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for await (const dirent of dir)
* console.log(dirent.name);
* } catch (err) {
* console.error(err);
* }
* ```
*
* When using the async iterator, the `fs.Dir` object will be automatically
* closed after the iterator exits.
* @since v12.12.0
*/
export class Dir implements AsyncIterable<Dirent> {
/**
* The read-only path of this directory as was provided to {@link opendir},{@link opendirSync}, or `fsPromises.opendir()`.
* @since v12.12.0
*/
readonly path: string;
/**
* Asynchronously iterates over the directory via `readdir(3)` until all entries have been read.
*/
[Symbol.asyncIterator](): AsyncIterableIterator<Dirent>;
/**
* Asynchronously close the directory's underlying resource handle.
* Subsequent reads will result in errors.
*
* A promise is returned that will be fulfilled after the resource has been
* closed.
* @since v12.12.0
*/
close(): Promise<void>;
close(cb: NoParamCallback): void;
/**
* Synchronously close the directory's underlying resource handle.
* Subsequent reads will result in errors.
* @since v12.12.0
*/
closeSync(): void;
/**
* Asynchronously read the next directory entry via [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) as an `fs.Dirent`.
*
* A promise is returned that will be fulfilled with an `fs.Dirent`, or `null`if there are no more directory entries to read.
*
* Directory entries returned by this function are in no particular order as
* provided by the operating system's underlying directory mechanisms.
* Entries added or removed while iterating over the directory might not be
* included in the iteration results.
* @since v12.12.0
* @return containing {fs.Dirent|null}
*/
read(): Promise<Dirent | null>;
read(cb: (err: NodeJS.ErrnoException | null, dirEnt: Dirent | null) => void): void;
/**
* Synchronously read the next directory entry as an `fs.Dirent`. See the
* POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more detail.
*
* If there are no more directory entries to read, `null` will be returned.
*
* Directory entries returned by this function are in no particular order as
* provided by the operating system's underlying directory mechanisms.
* Entries added or removed while iterating over the directory might not be
* included in the iteration results.
* @since v12.12.0
*/
readSync(): Dirent | null;
}
/**
* Class: fs.StatWatcher
* @since v14.3.0, v12.20.0
* Extends `EventEmitter`
* A successful call to {@link watchFile} method will return a new fs.StatWatcher object.
*/
export interface StatWatcher extends EventEmitter {
/**
* When called, requests that the Node.js event loop _not_ exit so long as the `fs.StatWatcher` is active. Calling `watcher.ref()` multiple times will have
* no effect.
*
* By default, all `fs.StatWatcher` objects are "ref'ed", making it normally
* unnecessary to call `watcher.ref()` unless `watcher.unref()` had been
* called previously.
* @since v14.3.0, v12.20.0
*/
ref(): this;
/**
* When called, the active `fs.StatWatcher` object will not require the Node.js
* event loop to remain active. If there is no other activity keeping the
* event loop running, the process may exit before the `fs.StatWatcher` object's
* callback is invoked. Calling `watcher.unref()` multiple times will have
* no effect.
* @since v14.3.0, v12.20.0
|
*/
unref(): this;
}
export interface FSWatcher extends EventEmitter {
/**
* Stop watching for changes on the given `fs.FSWatcher`. Once stopped, the `fs.FSWatcher` object is no longer usable.
* @since v0.5.8
*/
close(): void;
/**
* When called, requests that the Node.js event loop _not_ exit so long as the `fs.FSWatcher` is active. Calling `watcher.ref()` multiple times will have
* no effect.
*
* By default, all `fs.FSWatcher` objects are "ref'ed", making it normally
* unnecessary to call `watcher.ref()` unless `watcher.unref()` had been
* called previously.
* @since v14.3.0, v12.20.0
*/
ref(): this;
/**
* When called, the active `fs.FSWatcher` object will not require the Node.js
* event loop to remain active. If there is no other activity keeping the
* event loop running, the process may exit before the `fs.FSWatcher` object's
* callback is invoked. Calling `watcher.unref()` multiple times will have
* no effect.
* @since v14.3.0, v12.20.0
*/
unref(): this;
/**
* events.EventEmitter
* 1. change
* 2. close
* 3. error
*/
addListener(event: string, listener: (...args: any[]) => void): this;
addListener(event: "change", listener: (eventType: string, filename: string | Buffer) => void): this;
addListener(event: "close", listener: () => void): this;
addListener(event: "error", listener: (error: Error) => void): this;
on(event: string, listener: (...args: any[]) => void): this;
on(event: "change", listener: (eventType: string, filename: string | Buffer) => void): this;
on(event: "close", listener: () => void): this;
on(event: "error", listener: (error: Error) => void): this;
once(event: string, listener: (...args: any[]) => void): this;
once(event: "change", listener: (eventType: string, filename: string | Buffer) => void): this;
once(event: "close", listener: () => void): this;
once(event: "error", listener: (error: Error) => void): this;
prependListener(event: string, listener: (...args: any[]) => void): this;
prependListener(event: "change", listener: (eventType: string, filename: string | Buffer) => void): this;
prependListener(event: "close", listener: () => void): this;
prependListener(event: "error", listener: (error: Error) => void): this;
prependOnceListener(event: string, listener: (...args: any[]) => void): this;
prependOnceListener(event: "change", listener: (eventType: string, filename: string | Buffer) => void): this;
prependOnceListener(event: "close", listener: () => void): this;
prependOnceListener(event: "error", listener: (error: Error) => void): this;
}
/**
* Instances of `fs.ReadStream` are created and returned using the {@link createReadStream} function.
* @since v0.1.93
*/
export class ReadStream extends stream.Readable {
close(callback?: (err?: NodeJS.ErrnoException | null) => void): void;
/**
* The number of bytes that have been read so far.
* @since v6.4.0
*/
bytesRead: number;
/**
* The path to the file the stream is reading from as specified in the first
* argument to `fs.createReadStream()`. If `path` is passed as a string, then`readStream.path` will be a string. If `path` is passed as a `Buffer`, then`readStream.path` will be a
* `Buffer`. If `fd` is specified, then`readStream.path` will be `undefined`.
* @since v0.1.93
*/
path: string | Buffer;
/**
* This property is `true` if the underlying file has not been opened yet,
* i.e. before the `'ready'` event is emitted.
* @since v11.2.0, v10.16.0
|
*/
pending: boolean;
/**
* events.EventEmitter
* 1. open
* 2. close
* 3. ready
*/
addListener(event: "close", listener: () => void): this;
addListener(event: "data", listener: (chunk: Buffer | string) => void): this;
addListener(event: "end", listener: () => void): this;
addListener(event: "error", listener: (err: Error) => void): this;
addListener(event: "open", listener: (fd: number) => void): this;
addListener(event: "pause", listener: () => void): this;
addListener(event: "readable", listener: () => void): this;
addListener(event: "ready", listener: () => void): this;
addListener(event: "resume", listener: () => void): this;
addListener(event: string | symbol, listener: (...args: any[]) => void): this;
on(event: "close", listener: () => void): this;
on(event: "data", listener: (chunk: Buffer | string) => void): this;
on(event: "end", listener: () => void): this;
on(event: "error", listener: (err: Error) => void): this;
on(event: "open", listener: (fd: number) => void): this;
on(event: "pause", listener: () => void): this;
on(event: "readable", listener: () => void): this;
on(event: "ready", listener: () => void): this;
on(event: "resume", listener: () => void): this;
on(event: string | symbol, listener: (...args: any[]) => void): this;
once(event: "close", listener: () => void): this;
once(event: "data", listener: (chunk: Buffer | string) => void): this;
once(event: "end", listener: () => void): this;
once(event: "error", listener: (err: Error) => void): this;
once(event: "open", listener: (fd: number) => void): this;
once(event: "pause", listener: () => void): this;
once(event: "readable", listener: () => void): this;
once(event: "ready", listener: () => void): this;
once(event: "resume", listener: () => void): this;
once(event: string | symbol, listener: (...args: any[]) => void): this;
prependListener(event: "close", listener: () => void): this;
prependListener(event: "data", listener: (chunk: Buffer | string) => void): this;
prependListener(event: "end", listener: () => void): this;
prependListener(event: "error", listener: (err: Error) => void): this;
prependListener(event: "open", listener: (fd: number) => void): this;
prependListener(event: "pause", listener: () => void): this;
prependListener(event: "readable", listener: () => void): this;
prependListener(event: "ready", listener: () => void): this;
prependListener(event: "resume", listener: () => void): this;
prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
prependOnceListener(event: "close", listener: () => void): this;
prependOnceListener(event: "data", listener: (chunk: Buffer | string) => void): this;
prependOnceListener(event: "end", listener: () => void): this;
prependOnceListener(event: "error", listener: (err: Error) => void): this;
prependOnceListener(event: "open", listener: (fd: number) => void): this;
prependOnceListener(event: "pause", listener: () => void): this;
prependOnceListener(event: "readable", listener: () => void): this;
prependOnceListener(event: "ready", listener: () => void): this;
prependOnceListener(event: "resume", listener: () => void): this;
prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
}
/**
* * Extends `stream.Writable`
*
* Instances of `fs.WriteStream` are created and returned using the {@link createWriteStream} function.
* @since v0.1.93
*/
export class WriteStream extends stream.Writable {
/**
* Closes `writeStream`. Optionally accepts |
a
* callback that will be executed once the `writeStream`is closed.
* @since v0.9.4
*/
close(callback?: (err?: NodeJS.ErrnoException | null) => void): void;
/**
* The number of bytes written so far. Does not include data that is still queued
* for writing.
* @since v0.4.7
*/
bytesWritten: number;
/**
* The path to the file the stream is writing to as specified in the first
* argument to {@link createWriteStream}. If `path` is passed as a string, then`writeStream.path` will be a string. If `path` is passed as a `Buffer`, then`writeStream.path` will be a
* `Buffer`.
* @since v0.1.93
*/
path: string | Buffer;
/**
* This property is `true` if the underlying file has not been opened yet,
* i.e. before the `'ready'` event is emitted.
* @since v11.2.0
*/
pending: boolean;
/**
* events.EventEmitter
* 1. open
* 2. close
* 3. ready
*/
addListener(event: "close", listener: () => void): this;
addListener(event: "drain", listener: () => void): this;
addListener(event: "error", listener: (err: Error) => void): this;
addListener(event: "finish", listener: () => void): this;
addListener(event: "open", listener: (fd: number) => void): this;
addListener(event: "pipe", listener: (src: stream.Readable) => void): this;
addListener(event: "ready", listener: () => void): this;
addListener(event: "unpipe", listener: (src: stream.Readable) => void): this;
addListener(event: string | symbol, listener: (...args: any[]) => void): this;
on(event: "close", listener: () => void): this;
on(event: "drain", listener: () => void): this;
on(event: "error", listener: (err: Error) => void): this;
on(event: "finish", listener: () => void): this;
on(event: "open", listener: (fd: number) => void): this;
on(event: "pipe", listener: (src: stream.Readable) => void): this;
on(event: "ready", listener: () => void): this;
on(event: "unpipe", listener: (src: stream.Readable) => void): this;
on(event: string | symbol, listener: (...args: any[]) => void): this;
once(event: "close", listener: () => void): this;
once(event: "drain", listener: () => void): this;
once(event: "error", listener: (err: Error) => void): this;
once(event: "finish", listener: () => void): this;
once(event: "open", listener: (fd: number) => void): this;
once(event: "pipe", listener: (src: stream.Readable) => void): this;
once(event: "ready", listener: () => void): this;
once(event: "unpipe", listener: (src: stream.Readable) => void): this;
once(event: string | symbol, listener: (...args: any[]) => void): this;
prependListener(event: "close", listener: () => void): this;
prependListener(event: "drain", listener: () => void): this;
prependListener(event: "error", listener: (err: Error) => void): this;
prependListener(event: "finish", listener: () => void): this;
prependListener(event: "open", listener: (fd: number) => void): this;
prependListener(event: "pipe", listener: (src: stream.Readable) => void): this;
prependListener(event: "ready", listener: () => void): this;
prependListener(event: "unpipe", listener: (src: stream.Readable) => void): this;
prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
prependOnceListener(event: "close", listener: () => void): this;
prependOnceListener(event: "drain", listener: () => void): this;
prependOnceListener(event: "error", listener: (err: Error) => void): this;
prependOnceListener(event: "finish", listener: () => void): this;
prependOnceListener(event: "open" |
, listener: (fd: number) => void): this;
prependOnceListener(event: "pipe", listener: (src: stream.Readable) => void): this;
prependOnceListener(event: "ready", listener: () => void): this;
prependOnceListener(event: "unpipe", listener: (src: stream.Readable) => void): this;
prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
}
/**
* Asynchronously rename file at `oldPath` to the pathname provided
* as `newPath`. In the case that `newPath` already exists, it will
* be overwritten. If there is a directory at `newPath`, an error will
* be raised instead. No arguments other than a possible exception are
* given to the completion callback.
*
* See also: [`rename(2)`](http://man7.org/linux/man-pages/man2/rename.2.html).
*
* ```js
* import { rename } from 'node:fs';
*
* rename('oldFile.txt', 'newFile.txt', (err) => {
* if (err) throw err;
* console.log('Rename complete!');
* });
* ```
* @since v0.0.2
*/
export function rename(oldPath: PathLike, newPath: PathLike, callback: NoParamCallback): void;
export namespace rename {
/**
* Asynchronous rename(2) - Change the name or location of a file or directory.
* @param oldPath A path to a file. If a URL is provided, it must use the `file:` protocol.
* URL support is _experimental_.
* @param newPath A path to a file. If a URL is provided, it must use the `file:` protocol.
* URL support is _experimental_.
*/
function __promisify__(oldPath: PathLike, newPath: PathLike): Promise<void>;
}
/**
* Renames the file from `oldPath` to `newPath`. Returns `undefined`.
*
* See the POSIX [`rename(2)`](http://man7.org/linux/man-pages/man2/rename.2.html) documentation for more details.
* @since v0.1.21
*/
export function renameSync(oldPath: PathLike, newPath: PathLike): void;
/**
* Truncates the file. No arguments other than a possible exception are
* given to the completion callback. A file descriptor can also be passed as the
* first argument. In this case, `fs.ftruncate()` is called.
*
* ```js
* import { truncate } from 'node:fs';
* // Assuming that 'path/file.txt' is a regular file.
* truncate('path/file.txt', (err) => {
* if (err) throw err;
* console.log('path/file.txt was truncated');
* });
* ```
*
* Passing a file descriptor is deprecated and may result in an error being thrown
* in the future.
*
* See the POSIX [`truncate(2)`](http://man7.org/linux/man-pages/man2/truncate.2.html) documentation for more details.
* @since v0.8.6
* @param [len=0]
*/
export function truncate(path: PathLike, len: number | undefined | null, callback: NoParamCallback): void;
/**
* Asynchronous truncate(2) - Truncate a file to a specified length.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
export function truncate(path: PathLike, callback: NoParamCallback): void;
export namespace truncate {
/**
* Asynchronous truncate(2) - Truncate a file to a specified length.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param len If not specified, defaults to `0`.
*/
function __promisify__(path: PathLike, len?: number | null): Promise<void>;
}
/**
* Truncates the file. Returns `undefined`. A file descriptor can also be
* passed as the first argument. In this case, `fs.ftruncateSync()` is called.
*
* Passing a file descriptor is deprecated and may result in an error being thrown
* in the future.
* @since v0.8.6
* @param [len=0]
*/
export function truncateSync(path: PathLike, len?: number | null): void;
/**
* Truncates th |
e file descriptor. No arguments other than a possible exception are
* given to the completion callback.
*
* See the POSIX [`ftruncate(2)`](http://man7.org/linux/man-pages/man2/ftruncate.2.html) documentation for more detail.
*
* If the file referred to by the file descriptor was larger than `len` bytes, only
* the first `len` bytes will be retained in the file.
*
* For example, the following program retains only the first four bytes of the
* file:
*
* ```js
* import { open, close, ftruncate } from 'node:fs';
*
* function closeFd(fd) {
* close(fd, (err) => {
* if (err) throw err;
* });
* }
*
* open('temp.txt', 'r+', (err, fd) => {
* if (err) throw err;
*
* try {
* ftruncate(fd, 4, (err) => {
* closeFd(fd);
* if (err) throw err;
* });
* } catch (err) {
* closeFd(fd);
* if (err) throw err;
* }
* });
* ```
*
* If the file previously was shorter than `len` bytes, it is extended, and the
* extended part is filled with null bytes (`'\0'`):
*
* If `len` is negative then `0` will be used.
* @since v0.8.6
* @param [len=0]
*/
export function ftruncate(fd: number, len: number | undefined | null, callback: NoParamCallback): void;
/**
* Asynchronous ftruncate(2) - Truncate a file to a specified length.
* @param fd A file descriptor.
*/
export function ftruncate(fd: number, callback: NoParamCallback): void;
export namespace ftruncate {
/**
* Asynchronous ftruncate(2) - Truncate a file to a specified length.
* @param fd A file descriptor.
* @param len If not specified, defaults to `0`.
*/
function __promisify__(fd: number, len?: number | null): Promise<void>;
}
/**
* Truncates the file descriptor. Returns `undefined`.
*
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link ftruncate}.
* @since v0.8.6
* @param [len=0]
*/
export function ftruncateSync(fd: number, len?: number | null): void;
/**
* Asynchronously changes owner and group of a file. No arguments other than a
* possible exception are given to the completion callback.
*
* See the POSIX [`chown(2)`](http://man7.org/linux/man-pages/man2/chown.2.html) documentation for more detail.
* @since v0.1.97
*/
export function chown(path: PathLike, uid: number, gid: number, callback: NoParamCallback): void;
export namespace chown {
/**
* Asynchronous chown(2) - Change ownership of a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
function __promisify__(path: PathLike, uid: number, gid: number): Promise<void>;
}
/**
* Synchronously changes owner and group of a file. Returns `undefined`.
* This is the synchronous version of {@link chown}.
*
* See the POSIX [`chown(2)`](http://man7.org/linux/man-pages/man2/chown.2.html) documentation for more detail.
* @since v0.1.97
*/
export function chownSync(path: PathLike, uid: number, gid: number): void;
/**
* Sets the owner of the file. No arguments other than a possible exception are
* given to the completion callback.
*
* See the POSIX [`fchown(2)`](http://man7.org/linux/man-pages/man2/fchown.2.html) documentation for more detail.
* @since v0.4.7
*/
export function fchown(fd: number, uid: number, gid: number, callback: NoParamCallback): void;
export namespace fchown {
/**
* Asynchronous fchown(2) - Change ownership of a file.
* @param fd A file descriptor.
*/
function __promisify__(fd: number, uid: number, gid: number): Promise<void>;
}
/**
* Sets the owner of the file. R |
eturns `undefined`.
*
* See the POSIX [`fchown(2)`](http://man7.org/linux/man-pages/man2/fchown.2.html) documentation for more detail.
* @since v0.4.7
* @param uid The file's new owner's user id.
* @param gid The file's new group's group id.
*/
export function fchownSync(fd: number, uid: number, gid: number): void;
/**
* Set the owner of the symbolic link. No arguments other than a possible
* exception are given to the completion callback.
*
* See the POSIX [`lchown(2)`](http://man7.org/linux/man-pages/man2/lchown.2.html) documentation for more detail.
*/
export function lchown(path: PathLike, uid: number, gid: number, callback: NoParamCallback): void;
export namespace lchown {
/**
* Asynchronous lchown(2) - Change ownership of a file. Does not dereference symbolic links.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
function __promisify__(path: PathLike, uid: number, gid: number): Promise<void>;
}
/**
* Set the owner for the path. Returns `undefined`.
*
* See the POSIX [`lchown(2)`](http://man7.org/linux/man-pages/man2/lchown.2.html) documentation for more details.
* @param uid The file's new owner's user id.
* @param gid The file's new group's group id.
*/
export function lchownSync(path: PathLike, uid: number, gid: number): void;
/**
* Changes the access and modification times of a file in the same way as {@link utimes}, with the difference that if the path refers to a symbolic
* link, then the link is not dereferenced: instead, the timestamps of the
* symbolic link itself are changed.
*
* No arguments other than a possible exception are given to the completion
* callback.
* @since v14.5.0, v12.19.0
*/
export function lutimes(path: PathLike, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void;
export namespace lutimes {
/**
* Changes the access and modification times of a file in the same way as `fsPromises.utimes()`,
* with the difference that if the path refers to a symbolic link, then the link is not
* dereferenced: instead, the timestamps of the symbolic link itself are changed.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param atime The last access time. If a string is provided, it will be coerced to number.
* @param mtime The last modified time. If a string is provided, it will be coerced to number.
*/
function __promisify__(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>;
}
/**
* Change the file system timestamps of the symbolic link referenced by `path`.
* Returns `undefined`, or throws an exception when parameters are incorrect or
* the operation fails. This is the synchronous version of {@link lutimes}.
* @since v14.5.0, v12.19.0
*/
export function lutimesSync(path: PathLike, atime: TimeLike, mtime: TimeLike): void;
/**
* Asynchronously changes the permissions of a file. No arguments other than a
* possible exception are given to the completion callback.
*
* See the POSIX [`chmod(2)`](http://man7.org/linux/man-pages/man2/chmod.2.html) documentation for more detail.
*
* ```js
* import { chmod } from 'node:fs';
*
* chmod('my_file.txt', 0o775, (err) => {
* if (err) throw err;
* console.log('The permissions for file "my_file.txt" have been changed!');
* });
* ```
* @since v0.1.30
*/
export function chmod(path: PathLike, mode: Mode, callback: NoParamCallback): void;
export namespace chmod {
/**
* Asynchronous chmod(2) - Change permissions of a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param mode A file |
mode. If a string is passed, it is parsed as an octal integer.
*/
function __promisify__(path: PathLike, mode: Mode): Promise<void>;
}
/**
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link chmod}.
*
* See the POSIX [`chmod(2)`](http://man7.org/linux/man-pages/man2/chmod.2.html) documentation for more detail.
* @since v0.6.7
*/
export function chmodSync(path: PathLike, mode: Mode): void;
/**
* Sets the permissions on the file. No arguments other than a possible exception
* are given to the completion callback.
*
* See the POSIX [`fchmod(2)`](http://man7.org/linux/man-pages/man2/fchmod.2.html) documentation for more detail.
* @since v0.4.7
*/
export function fchmod(fd: number, mode: Mode, callback: NoParamCallback): void;
export namespace fchmod {
/**
* Asynchronous fchmod(2) - Change permissions of a file.
* @param fd A file descriptor.
* @param mode A file mode. If a string is passed, it is parsed as an octal integer.
*/
function __promisify__(fd: number, mode: Mode): Promise<void>;
}
/**
* Sets the permissions on the file. Returns `undefined`.
*
* See the POSIX [`fchmod(2)`](http://man7.org/linux/man-pages/man2/fchmod.2.html) documentation for more detail.
* @since v0.4.7
*/
export function fchmodSync(fd: number, mode: Mode): void;
/**
* Changes the permissions on a symbolic link. No arguments other than a possible
* exception are given to the completion callback.
*
* This method is only implemented on macOS.
*
* See the POSIX [`lchmod(2)`](https://www.freebsd.org/cgi/man.cgi?query=lchmod&sektion=2) documentation for more detail.
* @deprecated Since v0.4.7
*/
export function lchmod(path: PathLike, mode: Mode, callback: NoParamCallback): void;
/** @deprecated */
export namespace lchmod {
/**
* Asynchronous lchmod(2) - Change permissions of a file. Does not dereference symbolic links.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param mode A file mode. If a string is passed, it is parsed as an octal integer.
*/
function __promisify__(path: PathLike, mode: Mode): Promise<void>;
}
/**
* Changes the permissions on a symbolic link. Returns `undefined`.
*
* This method is only implemented on macOS.
*
* See the POSIX [`lchmod(2)`](https://www.freebsd.org/cgi/man.cgi?query=lchmod&sektion=2) documentation for more detail.
* @deprecated Since v0.4.7
*/
export function lchmodSync(path: PathLike, mode: Mode): void;
/**
* Asynchronous [`stat(2)`](http://man7.org/linux/man-pages/man2/stat.2.html). The callback gets two arguments `(err, stats)` where`stats` is an `fs.Stats` object.
*
* In case of an error, the `err.code` will be one of `Common System Errors`.
*
* {@link stat} follows symbolic links. Use {@link lstat} to look at the
* links themselves.
*
* Using `fs.stat()` to check for the existence of a file before calling`fs.open()`, `fs.readFile()`, or `fs.writeFile()` is not recommended.
* Instead, user code should open/read/write the file directly and handle the
* error raised if the file is not available.
*
* To check if a file exists without manipulating it afterwards, {@link access} is recommended.
*
* For example, given the following directory structure:
*
* ```text
* - txtDir
* -- file.txt
* - app.js
* ```
*
* The next program will check for the stats of the given paths:
*
* ```js
* import { stat } from 'node:fs';
*
* const pathsToCheck = ['./txtDir', './txtDir/file.txt'];
*
* for (let i = 0; i < pathsToCheck.length; i++) {
* stat(pathsToCheck[i |
], (err, stats) => {
* console.log(stats.isDirectory());
* console.log(stats);
* });
* }
* ```
*
* The resulting output will resemble:
*
* ```console
* true
* Stats {
* dev: 16777220,
* mode: 16877,
* nlink: 3,
* uid: 501,
* gid: 20,
* rdev: 0,
* blksize: 4096,
* ino: 14214262,
* size: 96,
* blocks: 0,
* atimeMs: 1561174653071.963,
* mtimeMs: 1561174614583.3518,
* ctimeMs: 1561174626623.5366,
* birthtimeMs: 1561174126937.2893,
* atime: 2019-06-22T03:37:33.072Z,
* mtime: 2019-06-22T03:36:54.583Z,
* ctime: 2019-06-22T03:37:06.624Z,
* birthtime: 2019-06-22T03:28:46.937Z
* }
* false
* Stats {
* dev: 16777220,
* mode: 33188,
* nlink: 1,
* uid: 501,
* gid: 20,
* rdev: 0,
* blksize: 4096,
* ino: 14214074,
* size: 8,
* blocks: 8,
* atimeMs: 1561174616618.8555,
* mtimeMs: 1561174614584,
* ctimeMs: 1561174614583.8145,
* birthtimeMs: 1561174007710.7478,
* atime: 2019-06-22T03:36:56.619Z,
* mtime: 2019-06-22T03:36:54.584Z,
* ctime: 2019-06-22T03:36:54.584Z,
* birthtime: 2019-06-22T03:26:47.711Z
* }
* ```
* @since v0.0.2
*/
export function stat(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
export function stat(
path: PathLike,
options:
| (StatOptions & {
bigint?: false | undefined;
})
| undefined,
callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void,
): void;
export function stat(
path: PathLike,
options: StatOptions & {
bigint: true;
},
callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void,
): void;
export function stat(
path: PathLike,
options: StatOptions | undefined,
callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void,
): void;
export namespace stat {
/**
* Asynchronous stat(2) - Get file status.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
function __promisify__(
path: PathLike,
options?: StatOptions & {
bigint?: false | undefined;
},
): Promise<Stats>;
function __promisify__(
path: PathLike,
options: StatOptions & {
bigint: true;
},
): Promise<BigIntStats>;
function __promisify__(path: PathLike, options?: StatOptions): Promise<Stats | BigIntStats>;
}
export interface StatSyncFn extends Function {
(path: PathLike, options?: undefined): Stats;
(
path: PathLike,
options?: StatSyncOptions & {
bigint?: false | undefined;
throwIfNoEntry: false;
},
): Stats | undefined;
(
path: PathLike,
options: StatSyncOptions & {
bigint: true;
throwIfNoEntry: false;
},
): BigIntStats | undefined;
(
path: PathLike,
options?: StatSyncOptions & {
bigint?: false | undefined;
},
): Stats;
(
path: PathLike,
options: StatSyncOptions & {
bigint: true;
},
): BigIntStats;
(
path: PathLike,
options: StatSyncOptions & {
bigint: boolean;
throwIfNoEntry?: false | undefined;
},
): Stats | BigIntStats;
(path: PathLike, options?: StatSyncOptions): Stats | BigIntStats | undefined;
}
/**
* Synchronous stat(2) |
- Get file status.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
export const statSync: StatSyncFn;
/**
* Invokes the callback with the `fs.Stats` for the file descriptor.
*
* See the POSIX [`fstat(2)`](http://man7.org/linux/man-pages/man2/fstat.2.html) documentation for more detail.
* @since v0.1.95
*/
export function fstat(fd: number, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
export function fstat(
fd: number,
options:
| (StatOptions & {
bigint?: false | undefined;
})
| undefined,
callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void,
): void;
export function fstat(
fd: number,
options: StatOptions & {
bigint: true;
},
callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void,
): void;
export function fstat(
fd: number,
options: StatOptions | undefined,
callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void,
): void;
export namespace fstat {
/**
* Asynchronous fstat(2) - Get file status.
* @param fd A file descriptor.
*/
function __promisify__(
fd: number,
options?: StatOptions & {
bigint?: false | undefined;
},
): Promise<Stats>;
function __promisify__(
fd: number,
options: StatOptions & {
bigint: true;
},
): Promise<BigIntStats>;
function __promisify__(fd: number, options?: StatOptions): Promise<Stats | BigIntStats>;
}
/**
* Retrieves the `fs.Stats` for the file descriptor.
*
* See the POSIX [`fstat(2)`](http://man7.org/linux/man-pages/man2/fstat.2.html) documentation for more detail.
* @since v0.1.95
*/
export function fstatSync(
fd: number,
options?: StatOptions & {
bigint?: false | undefined;
},
): Stats;
export function fstatSync(
fd: number,
options: StatOptions & {
bigint: true;
},
): BigIntStats;
export function fstatSync(fd: number, options?: StatOptions): Stats | BigIntStats;
/**
* Retrieves the `fs.Stats` for the symbolic link referred to by the path.
* The callback gets two arguments `(err, stats)` where `stats` is a `fs.Stats` object. `lstat()` is identical to `stat()`, except that if `path` is a symbolic
* link, then the link itself is stat-ed, not the file that it refers to.
*
* See the POSIX [`lstat(2)`](http://man7.org/linux/man-pages/man2/lstat.2.html) documentation for more details.
* @since v0.1.30
*/
export function lstat(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
export function lstat(
path: PathLike,
options:
| (StatOptions & {
bigint?: false | undefined;
})
| undefined,
callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void,
): void;
export function lstat(
path: PathLike,
options: StatOptions & {
bigint: true;
},
callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void,
): void;
export function lstat(
path: PathLike,
options: StatOptions | undefined,
callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void,
): void;
export namespace lstat {
/**
* Asynchronous lstat(2) - Get file status. Does not dereference symbolic links.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
function __promisify__(
path: PathLike,
options?: StatOptions & |
{
bigint?: false | undefined;
},
): Promise<Stats>;
function __promisify__(
path: PathLike,
options: StatOptions & {
bigint: true;
},
): Promise<BigIntStats>;
function __promisify__(path: PathLike, options?: StatOptions): Promise<Stats | BigIntStats>;
}
/**
* Asynchronous [`statfs(2)`](http://man7.org/linux/man-pages/man2/statfs.2.html). Returns information about the mounted file system which
* contains `path`. The callback gets two arguments `(err, stats)` where `stats`is an `fs.StatFs` object.
*
* In case of an error, the `err.code` will be one of `Common System Errors`.
* @since v19.6.0, v18.15.0
* @param path A path to an existing file or directory on the file system to be queried.
*/
export function statfs(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: StatsFs) => void): void;
export function statfs(
path: PathLike,
options:
| (StatFsOptions & {
bigint?: false | undefined;
})
| undefined,
callback: (err: NodeJS.ErrnoException | null, stats: StatsFs) => void,
): void;
export function statfs(
path: PathLike,
options: StatFsOptions & {
bigint: true;
},
callback: (err: NodeJS.ErrnoException | null, stats: BigIntStatsFs) => void,
): void;
export function statfs(
path: PathLike,
options: StatFsOptions | undefined,
callback: (err: NodeJS.ErrnoException | null, stats: StatsFs | BigIntStatsFs) => void,
): void;
export namespace statfs {
/**
* Asynchronous statfs(2) - Returns information about the mounted file system which contains path. The callback gets two arguments (err, stats) where stats is an <fs.StatFs> object.
* @param path A path to an existing file or directory on the file system to be queried.
*/
function __promisify__(
path: PathLike,
options?: StatFsOptions & {
bigint?: false | undefined;
},
): Promise<StatsFs>;
function __promisify__(
path: PathLike,
options: StatFsOptions & {
bigint: true;
},
): Promise<BigIntStatsFs>;
function __promisify__(path: PathLike, options?: StatFsOptions): Promise<StatsFs | BigIntStatsFs>;
}
/**
* Synchronous [`statfs(2)`](http://man7.org/linux/man-pages/man2/statfs.2.html). Returns information about the mounted file system which
* contains `path`.
*
* In case of an error, the `err.code` will be one of `Common System Errors`.
* @since v19.6.0, v18.15.0
* @param path A path to an existing file or directory on the file system to be queried.
*/
export function statfsSync(
path: PathLike,
options?: StatFsOptions & {
bigint?: false | undefined;
},
): StatsFs;
export function statfsSync(
path: PathLike,
options: StatFsOptions & {
bigint: true;
},
): BigIntStatsFs;
export function statfsSync(path: PathLike, options?: StatFsOptions): StatsFs | BigIntStatsFs;
/**
* Synchronous lstat(2) - Get file status. Does not dereference symbolic links.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
export const lstatSync: StatSyncFn;
/**
* Creates a new link from the `existingPath` to the `newPath`. See the POSIX [`link(2)`](http://man7.org/linux/man-pages/man2/link.2.html) documentation for more detail. No arguments other than
* a possible
* exception are given to the completion callback.
* @since v0.1.31
*/
export function link(existingPath: PathLike, newPath: PathLike, callback: NoParamCallback): void;
export namespace link {
/**
* A |
synchronous link(2) - Create a new link (also known as a hard link) to an existing file.
* @param existingPath A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param newPath A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
function __promisify__(existingPath: PathLike, newPath: PathLike): Promise<void>;
}
/**
* Creates a new link from the `existingPath` to the `newPath`. See the POSIX [`link(2)`](http://man7.org/linux/man-pages/man2/link.2.html) documentation for more detail. Returns `undefined`.
* @since v0.1.31
*/
export function linkSync(existingPath: PathLike, newPath: PathLike): void;
/**
* Creates the link called `path` pointing to `target`. No arguments other than a
* possible exception are given to the completion callback.
*
* See the POSIX [`symlink(2)`](http://man7.org/linux/man-pages/man2/symlink.2.html) documentation for more details.
*
* The `type` argument is only available on Windows and ignored on other platforms.
* It can be set to `'dir'`, `'file'`, or `'junction'`. If the `type` argument is
* not a string, Node.js will autodetect `target` type and use `'file'` or `'dir'`.
* If the `target` does not exist, `'file'` will be used. Windows junction points
* require the destination path to be absolute. When using `'junction'`, the`target` argument will automatically be normalized to absolute path. Junction
* points on NTFS volumes can only point to directories.
*
* Relative targets are relative to the link's parent directory.
*
* ```js
* import { symlink } from 'node:fs';
*
* symlink('./mew', './mewtwo', callback);
* ```
*
* The above example creates a symbolic link `mewtwo` which points to `mew` in the
* same directory:
*
* ```bash
* $ tree .
* .
* ├── mew
* └── mewtwo -> ./mew
* ```
* @since v0.1.31
* @param [type='null']
*/
export function symlink(
target: PathLike,
path: PathLike,
type: symlink.Type | undefined | null,
callback: NoParamCallback,
): void;
/**
* Asynchronous symlink(2) - Create a new symbolic link to an existing file.
* @param target A path to an existing file. If a URL is provided, it must use the `file:` protocol.
* @param path A path to the new symlink. If a URL is provided, it must use the `file:` protocol.
*/
export function symlink(target: PathLike, path: PathLike, callback: NoParamCallback): void;
export namespace symlink {
/**
* Asynchronous symlink(2) - Create a new symbolic link to an existing file.
* @param target A path to an existing file. If a URL is provided, it must use the `file:` protocol.
* @param path A path to the new symlink. If a URL is provided, it must use the `file:` protocol.
* @param type May be set to `'dir'`, `'file'`, or `'junction'` (default is `'file'`) and is only available on Windows (ignored on other platforms).
* When using `'junction'`, the `target` argument will automatically be normalized to an absolute path.
*/
function __promisify__(target: PathLike, path: PathLike, type?: string | null): Promise<void>;
type Type = "dir" | "file" | "junction";
}
/**
* Returns `undefined`.
*
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link symlink}.
* @since v0.1.31
* @param [type='null']
*/
export function symlinkSync(target: PathLike, path: PathLike, type?: symlink.Type | null): void;
/**
* Reads the contents of the symbolic link referred to by `path`. The callback gets
* two arguments `(err, linkString)`.
*
* See the POSIX [`readlink(2)`](http://man7.org/linux/man-pages/man2/readlink.2.html) documentation for more details.
|
*
* The optional `options` argument can be a string specifying an encoding, or an
* object with an `encoding` property specifying the character encoding to use for
* the link path passed to the callback. If the `encoding` is set to `'buffer'`,
* the link path returned will be passed as a `Buffer` object.
* @since v0.1.31
*/
export function readlink(
path: PathLike,
options: EncodingOption,
callback: (err: NodeJS.ErrnoException | null, linkString: string) => void,
): void;
/**
* Asynchronous readlink(2) - read value of a symbolic link.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function readlink(
path: PathLike,
options: BufferEncodingOption,
callback: (err: NodeJS.ErrnoException | null, linkString: Buffer) => void,
): void;
/**
* Asynchronous readlink(2) - read value of a symbolic link.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function readlink(
path: PathLike,
options: EncodingOption,
callback: (err: NodeJS.ErrnoException | null, linkString: string | Buffer) => void,
): void;
/**
* Asynchronous readlink(2) - read value of a symbolic link.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
export function readlink(
path: PathLike,
callback: (err: NodeJS.ErrnoException | null, linkString: string) => void,
): void;
export namespace readlink {
/**
* Asynchronous readlink(2) - read value of a symbolic link.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(path: PathLike, options?: EncodingOption): Promise<string>;
/**
* Asynchronous readlink(2) - read value of a symbolic link.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(path: PathLike, options: BufferEncodingOption): Promise<Buffer>;
/**
* Asynchronous readlink(2) - read value of a symbolic link.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(path: PathLike, options?: EncodingOption): Promise<string | Buffer>;
}
/**
* Returns the symbolic link's string value.
*
* See the POSIX [`readlink(2)`](http://man7.org/linux/man-pages/man2/readlink.2.html) documentation for more details.
*
* The optional `options` argument can be a string specifying an encoding, or an
* object with an `encoding` property specifying the character encoding to use for
* the link path returned. If the `encoding` is set to `'buffer'`,
* the link path returned will be passed as a `Buffer` object.
* @since v0.1.31
*/
export function readlinkSync(path: PathLike, options?: EncodingOption): string;
/**
* Synchronous readlink(2) - read value of a symbolic link.
* @param path A path to a file. If a URL is provided, it must use the `f |
ile:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function readlinkSync(path: PathLike, options: BufferEncodingOption): Buffer;
/**
* Synchronous readlink(2) - read value of a symbolic link.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function readlinkSync(path: PathLike, options?: EncodingOption): string | Buffer;
/**
* Asynchronously computes the canonical pathname by resolving `.`, `..`, and
* symbolic links.
*
* A canonical pathname is not necessarily unique. Hard links and bind mounts can
* expose a file system entity through many pathnames.
*
* This function behaves like [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html), with some exceptions:
*
* 1. No case conversion is performed on case-insensitive file systems.
* 2. The maximum number of symbolic links is platform-independent and generally
* (much) higher than what the native [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html) implementation supports.
*
* The `callback` gets two arguments `(err, resolvedPath)`. May use `process.cwd`to resolve relative paths.
*
* Only paths that can be converted to UTF8 strings are supported.
*
* The optional `options` argument can be a string specifying an encoding, or an
* object with an `encoding` property specifying the character encoding to use for
* the path passed to the callback. If the `encoding` is set to `'buffer'`,
* the path returned will be passed as a `Buffer` object.
*
* If `path` resolves to a socket or a pipe, the function will return a system
* dependent name for that object.
* @since v0.1.31
*/
export function realpath(
path: PathLike,
options: EncodingOption,
callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void,
): void;
/**
* Asynchronous realpath(3) - return the canonicalized absolute pathname.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function realpath(
path: PathLike,
options: BufferEncodingOption,
callback: (err: NodeJS.ErrnoException | null, resolvedPath: Buffer) => void,
): void;
/**
* Asynchronous realpath(3) - return the canonicalized absolute pathname.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function realpath(
path: PathLike,
options: EncodingOption,
callback: (err: NodeJS.ErrnoException | null, resolvedPath: string | Buffer) => void,
): void;
/**
* Asynchronous realpath(3) - return the canonicalized absolute pathname.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
export function realpath(
path: PathLike,
callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void,
): void;
export namespace realpath {
/**
* Asynchronous realpath(3) - return the canonicalized absolute pathname.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
|
*/
function __promisify__(path: PathLike, options?: EncodingOption): Promise<string>;
/**
* Asynchronous realpath(3) - return the canonicalized absolute pathname.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(path: PathLike, options: BufferEncodingOption): Promise<Buffer>;
/**
* Asynchronous realpath(3) - return the canonicalized absolute pathname.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(path: PathLike, options?: EncodingOption): Promise<string | Buffer>;
/**
* Asynchronous [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html).
*
* The `callback` gets two arguments `(err, resolvedPath)`.
*
* Only paths that can be converted to UTF8 strings are supported.
*
* The optional `options` argument can be a string specifying an encoding, or an
* object with an `encoding` property specifying the character encoding to use for
* the path passed to the callback. If the `encoding` is set to `'buffer'`,
* the path returned will be passed as a `Buffer` object.
*
* On Linux, when Node.js is linked against musl libc, the procfs file system must
* be mounted on `/proc` in order for this function to work. Glibc does not have
* this restriction.
* @since v9.2.0
*/
function native(
path: PathLike,
options: EncodingOption,
callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void,
): void;
function native(
path: PathLike,
options: BufferEncodingOption,
callback: (err: NodeJS.ErrnoException | null, resolvedPath: Buffer) => void,
): void;
function native(
path: PathLike,
options: EncodingOption,
callback: (err: NodeJS.ErrnoException | null, resolvedPath: string | Buffer) => void,
): void;
function native(
path: PathLike,
callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void,
): void;
}
/**
* Returns the resolved pathname.
*
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link realpath}.
* @since v0.1.31
*/
export function realpathSync(path: PathLike, options?: EncodingOption): string;
/**
* Synchronous realpath(3) - return the canonicalized absolute pathname.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function realpathSync(path: PathLike, options: BufferEncodingOption): Buffer;
/**
* Synchronous realpath(3) - return the canonicalized absolute pathname.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function realpathSync(path: PathLike, options?: EncodingOption): string | Buffer;
export namespace realpathSync {
function native(path: PathLike, options?: EncodingOption): string;
function native(path: PathLike, options: BufferEncodingOption): Buffer;
function native(path: Pa |
thLike, options?: EncodingOption): string | Buffer;
}
/**
* Asynchronously removes a file or symbolic link. No arguments other than a
* possible exception are given to the completion callback.
*
* ```js
* import { unlink } from 'node:fs';
* // Assuming that 'path/file.txt' is a regular file.
* unlink('path/file.txt', (err) => {
* if (err) throw err;
* console.log('path/file.txt was deleted');
* });
* ```
*
* `fs.unlink()` will not work on a directory, empty or otherwise. To remove a
* directory, use {@link rmdir}.
*
* See the POSIX [`unlink(2)`](http://man7.org/linux/man-pages/man2/unlink.2.html) documentation for more details.
* @since v0.0.2
*/
export function unlink(path: PathLike, callback: NoParamCallback): void;
export namespace unlink {
/**
* Asynchronous unlink(2) - delete a name and possibly the file it refers to.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
function __promisify__(path: PathLike): Promise<void>;
}
/**
* Synchronous [`unlink(2)`](http://man7.org/linux/man-pages/man2/unlink.2.html). Returns `undefined`.
* @since v0.1.21
*/
export function unlinkSync(path: PathLike): void;
export interface RmDirOptions {
/**
* If an `EBUSY`, `EMFILE`, `ENFILE`, `ENOTEMPTY`, or
* `EPERM` error is encountered, Node.js will retry the operation with a linear
* backoff wait of `retryDelay` ms longer on each try. This option represents the
* number of retries. This option is ignored if the `recursive` option is not
* `true`.
* @default 0
*/
maxRetries?: number | undefined;
/**
* @deprecated since v14.14.0 In future versions of Node.js and will trigger a warning
* `fs.rmdir(path, { recursive: true })` will throw if `path` does not exist or is a file.
* Use `fs.rm(path, { recursive: true, force: true })` instead.
*
* If `true`, perform a recursive directory removal. In
* recursive mode, operations are retried on failure.
* @default false
*/
recursive?: boolean | undefined;
/**
* The amount of time in milliseconds to wait between retries.
* This option is ignored if the `recursive` option is not `true`.
* @default 100
*/
retryDelay?: number | undefined;
}
/**
* Asynchronous [`rmdir(2)`](http://man7.org/linux/man-pages/man2/rmdir.2.html). No arguments other than a possible exception are given
* to the completion callback.
*
* Using `fs.rmdir()` on a file (not a directory) results in an `ENOENT` error on
* Windows and an `ENOTDIR` error on POSIX.
*
* To get a behavior similar to the `rm -rf` Unix command, use {@link rm} with options `{ recursive: true, force: true }`.
* @since v0.0.2
*/
export function rmdir(path: PathLike, callback: NoParamCallback): void;
export function rmdir(path: PathLike, options: RmDirOptions, callback: NoParamCallback): void;
export namespace rmdir {
/**
* Asynchronous rmdir(2) - delete a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
function __promisify__(path: PathLike, options?: RmDirOptions): Promise<void>;
}
/**
* Synchronous [`rmdir(2)`](http://man7.org/linux/man-pages/man2/rmdir.2.html). Returns `undefined`.
*
* Using `fs.rmdirSync()` on a file (not a directory) results in an `ENOENT` error
* on Windows and an `ENOTDIR` error on POSIX.
*
* To get a behavior similar to the `rm -rf` Unix command, use {@link rmSync} with options `{ recursive: true, force: true }`.
* @since v0.1.21
*/
export function rmdirSync(path: PathLike, options?: RmDirOptions): v |
oid;
export interface RmOptions {
/**
* When `true`, exceptions will be ignored if `path` does not exist.
* @default false
*/
force?: boolean | undefined;
/**
* If an `EBUSY`, `EMFILE`, `ENFILE`, `ENOTEMPTY`, or
* `EPERM` error is encountered, Node.js will retry the operation with a linear
* backoff wait of `retryDelay` ms longer on each try. This option represents the
* number of retries. This option is ignored if the `recursive` option is not
* `true`.
* @default 0
*/
maxRetries?: number | undefined;
/**
* If `true`, perform a recursive directory removal. In
* recursive mode, operations are retried on failure.
* @default false
*/
recursive?: boolean | undefined;
/**
* The amount of time in milliseconds to wait between retries.
* This option is ignored if the `recursive` option is not `true`.
* @default 100
*/
retryDelay?: number | undefined;
}
/**
* Asynchronously removes files and directories (modeled on the standard POSIX `rm`utility). No arguments other than a possible exception are given to the
* completion callback.
* @since v14.14.0
*/
export function rm(path: PathLike, callback: NoParamCallback): void;
export function rm(path: PathLike, options: RmOptions, callback: NoParamCallback): void;
export namespace rm {
/**
* Asynchronously removes files and directories (modeled on the standard POSIX `rm` utility).
*/
function __promisify__(path: PathLike, options?: RmOptions): Promise<void>;
}
/**
* Synchronously removes files and directories (modeled on the standard POSIX `rm`utility). Returns `undefined`.
* @since v14.14.0
*/
export function rmSync(path: PathLike, options?: RmOptions): void;
export interface MakeDirectoryOptions {
/**
* Indicates whether parent folders should be created.
* If a folder was created, the path to the first created folder will be returned.
* @default false
*/
recursive?: boolean | undefined;
/**
* A file mode. If a string is passed, it is parsed as an octal integer. If not specified
* @default 0o777
*/
mode?: Mode | undefined;
}
/**
* Asynchronously creates a directory.
*
* The callback is given a possible exception and, if `recursive` is `true`, the
* first directory path created, `(err[, path])`.`path` can still be `undefined` when `recursive` is `true`, if no directory was
* created (for instance, if it was previously created).
*
* The optional `options` argument can be an integer specifying `mode` (permission
* and sticky bits), or an object with a `mode` property and a `recursive`property indicating whether parent directories should be created. Calling`fs.mkdir()` when `path` is a directory that
* exists results in an error only
* when `recursive` is false. If `recursive` is false and the directory exists,
* an `EEXIST` error occurs.
*
* ```js
* import { mkdir } from 'node:fs';
*
* // Create ./tmp/a/apple, regardless of whether ./tmp and ./tmp/a exist.
* mkdir('./tmp/a/apple', { recursive: true }, (err) => {
* if (err) throw err;
* });
* ```
*
* On Windows, using `fs.mkdir()` on the root directory even with recursion will
* result in an error:
*
* ```js
* import { mkdir } from 'node:fs';
*
* mkdir('/', { recursive: true }, (err) => {
* // => [Error: EPERM: operation not permitted, mkdir 'C:\']
* });
* ```
*
* See the POSIX [`mkdir(2)`](http://man7.org/linux/man-pages/man2/mkdir.2.html) documentation for more details.
* @since v0.1.8
*/
export function mkdir(
path: PathLike, |
options: MakeDirectoryOptions & {
recursive: true;
},
callback: (err: NodeJS.ErrnoException | null, path?: string) => void,
): void;
/**
* Asynchronous mkdir(2) - create a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
* should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
*/
export function mkdir(
path: PathLike,
options:
| Mode
| (MakeDirectoryOptions & {
recursive?: false | undefined;
})
| null
| undefined,
callback: NoParamCallback,
): void;
/**
* Asynchronous mkdir(2) - create a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
* should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
*/
export function mkdir(
path: PathLike,
options: Mode | MakeDirectoryOptions | null | undefined,
callback: (err: NodeJS.ErrnoException | null, path?: string) => void,
): void;
/**
* Asynchronous mkdir(2) - create a directory with a mode of `0o777`.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
export function mkdir(path: PathLike, callback: NoParamCallback): void;
export namespace mkdir {
/**
* Asynchronous mkdir(2) - create a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
* should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
*/
function __promisify__(
path: PathLike,
options: MakeDirectoryOptions & {
recursive: true;
},
): Promise<string | undefined>;
/**
* Asynchronous mkdir(2) - create a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
* should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
*/
function __promisify__(
path: PathLike,
options?:
| Mode
| (MakeDirectoryOptions & {
recursive?: false | undefined;
})
| null,
): Promise<void>;
/**
* Asynchronous mkdir(2) - create a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
* should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
*/
function __promisify__(
path: PathLike,
options?: Mode | MakeDirectoryOptions | null,
): Promise<string | undefined>;
}
/**
* Synchronously creates a directory. Returns `undefined`, or if `recursive` is`true`, the first directory path created.
* This is the synchronous version of {@link mkdir}.
*
* See the POSIX [`mkdir(2)`](http://man7.org/linux/man-pages/man2/mkdir.2.html) documentation for more details.
* @since v0.1.21
|
*/
export function mkdirSync(
path: PathLike,
options: MakeDirectoryOptions & {
recursive: true;
},
): string | undefined;
/**
* Synchronous mkdir(2) - create a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
* should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
*/
export function mkdirSync(
path: PathLike,
options?:
| Mode
| (MakeDirectoryOptions & {
recursive?: false | undefined;
})
| null,
): void;
/**
* Synchronous mkdir(2) - create a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
* should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
*/
export function mkdirSync(path: PathLike, options?: Mode | MakeDirectoryOptions | null): string | undefined;
/**
* Creates a unique temporary directory.
*
* Generates six random characters to be appended behind a required`prefix` to create a unique temporary directory. Due to platform
* inconsistencies, avoid trailing `X` characters in `prefix`. Some platforms,
* notably the BSDs, can return more than six random characters, and replace
* trailing `X` characters in `prefix` with random characters.
*
* The created directory path is passed as a string to the callback's second
* parameter.
*
* The optional `options` argument can be a string specifying an encoding, or an
* object with an `encoding` property specifying the character encoding to use.
*
* ```js
* import { mkdtemp } from 'node:fs';
* import { join } from 'node:path';
* import { tmpdir } from 'node:os';
*
* mkdtemp(join(tmpdir(), 'foo-'), (err, directory) => {
* if (err) throw err;
* console.log(directory);
* // Prints: /tmp/foo-itXde2 or C:\Users\...\AppData\Local\Temp\foo-itXde2
* });
* ```
*
* The `fs.mkdtemp()` method will append the six randomly selected characters
* directly to the `prefix` string. For instance, given a directory `/tmp`, if the
* intention is to create a temporary directory _within_`/tmp`, the `prefix`must end with a trailing platform-specific path separator
* (`require('node:path').sep`).
*
* ```js
* import { tmpdir } from 'node:os';
* import { mkdtemp } from 'node:fs';
*
* // The parent directory for the new temporary directory
* const tmpDir = tmpdir();
*
* // This method is *INCORRECT*:
* mkdtemp(tmpDir, (err, directory) => {
* if (err) throw err;
* console.log(directory);
* // Will print something similar to `/tmpabc123`.
* // A new temporary directory is created at the file system root
* // rather than *within* the /tmp directory.
* });
*
* // This method is *CORRECT*:
* import { sep } from 'node:path';
* mkdtemp(`${tmpDir}${sep}`, (err, directory) => {
* if (err) throw err;
* console.log(directory);
* // Will print something similar to `/tmp/abc123`.
* // A new temporary directory is created within
* // the /tmp directory.
* });
* ```
* @since v5.10.0
*/
export function mkdtemp(
prefix: string,
options: EncodingOption,
callback: (err: NodeJS.ErrnoException | null, folder: string) => void,
): void;
/**
* Asynchronously creates a unique temporary directory.
* Generates six random characters to be appended b |
ehind a required prefix to create a unique temporary directory.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function mkdtemp(
prefix: string,
options:
| "buffer"
| {
encoding: "buffer";
},
callback: (err: NodeJS.ErrnoException | null, folder: Buffer) => void,
): void;
/**
* Asynchronously creates a unique temporary directory.
* Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function mkdtemp(
prefix: string,
options: EncodingOption,
callback: (err: NodeJS.ErrnoException | null, folder: string | Buffer) => void,
): void;
/**
* Asynchronously creates a unique temporary directory.
* Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
*/
export function mkdtemp(
prefix: string,
callback: (err: NodeJS.ErrnoException | null, folder: string) => void,
): void;
export namespace mkdtemp {
/**
* Asynchronously creates a unique temporary directory.
* Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(prefix: string, options?: EncodingOption): Promise<string>;
/**
* Asynchronously creates a unique temporary directory.
* Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(prefix: string, options: BufferEncodingOption): Promise<Buffer>;
/**
* Asynchronously creates a unique temporary directory.
* Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(prefix: string, options?: EncodingOption): Promise<string | Buffer>;
}
/**
* Returns the created directory path.
*
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link mkdtemp}.
*
* The optional `options` argument can be a string specifying an encoding, or an
* object with an `encoding` property specifying the character encoding to use.
* @since v5.10.0
*/
export function mkdtempSync(prefix: string, options?: EncodingOption): string;
/**
* Synchronously creates a unique temporary directory.
* Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function mkdtempSync(prefix: string, options: BufferEncodingOption): Buffer;
/**
* Synchronously creates a unique temporary directory.
* Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function |
mkdtempSync(prefix: string, options?: EncodingOption): string | Buffer;
/**
* Reads the contents of a directory. The callback gets two arguments `(err, files)`where `files` is an array of the names of the files in the directory excluding`'.'` and `'..'`.
*
* See the POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more details.
*
* The optional `options` argument can be a string specifying an encoding, or an
* object with an `encoding` property specifying the character encoding to use for
* the filenames passed to the callback. If the `encoding` is set to `'buffer'`,
* the filenames returned will be passed as `Buffer` objects.
*
* If `options.withFileTypes` is set to `true`, the `files` array will contain `fs.Dirent` objects.
* @since v0.1.8
*/
export function readdir(
path: PathLike,
options:
| {
encoding: BufferEncoding | null;
withFileTypes?: false | undefined;
recursive?: boolean | undefined;
}
| BufferEncoding
| undefined
| null,
callback: (err: NodeJS.ErrnoException | null, files: string[]) => void,
): void;
/**
* Asynchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function readdir(
path: PathLike,
options:
| {
encoding: "buffer";
withFileTypes?: false | undefined;
recursive?: boolean | undefined;
}
| "buffer",
callback: (err: NodeJS.ErrnoException | null, files: Buffer[]) => void,
): void;
/**
* Asynchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function readdir(
path: PathLike,
options:
| (ObjectEncodingOptions & {
withFileTypes?: false | undefined;
recursive?: boolean | undefined;
})
| BufferEncoding
| undefined
| null,
callback: (err: NodeJS.ErrnoException | null, files: string[] | Buffer[]) => void,
): void;
/**
* Asynchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
export function readdir(
path: PathLike,
callback: (err: NodeJS.ErrnoException | null, files: string[]) => void,
): void;
/**
* Asynchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options If called with `withFileTypes: true` the result data will be an array of Dirent.
*/
export function readdir(
path: PathLike,
options: ObjectEncodingOptions & {
withFileTypes: true;
recursive?: boolean | undefined;
},
callback: (err: NodeJS.ErrnoException | null, files: Dirent[]) => void,
): void;
export namespace readdir {
/**
* Asynchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(
path: PathLike,
options?:
| {
encoding: BufferEncoding | nu |
ll;
withFileTypes?: false | undefined;
recursive?: boolean | undefined;
}
| BufferEncoding
| null,
): Promise<string[]>;
/**
* Asynchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(
path: PathLike,
options:
| "buffer"
| {
encoding: "buffer";
withFileTypes?: false | undefined;
recursive?: boolean | undefined;
},
): Promise<Buffer[]>;
/**
* Asynchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
function __promisify__(
path: PathLike,
options?:
| (ObjectEncodingOptions & {
withFileTypes?: false | undefined;
recursive?: boolean | undefined;
})
| BufferEncoding
| null,
): Promise<string[] | Buffer[]>;
/**
* Asynchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options If called with `withFileTypes: true` the result data will be an array of Dirent
*/
function __promisify__(
path: PathLike,
options: ObjectEncodingOptions & {
withFileTypes: true;
recursive?: boolean | undefined;
},
): Promise<Dirent[]>;
}
/**
* Reads the contents of the directory.
*
* See the POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more details.
*
* The optional `options` argument can be a string specifying an encoding, or an
* object with an `encoding` property specifying the character encoding to use for
* the filenames returned. If the `encoding` is set to `'buffer'`,
* the filenames returned will be passed as `Buffer` objects.
*
* If `options.withFileTypes` is set to `true`, the result will contain `fs.Dirent` objects.
* @since v0.1.21
*/
export function readdirSync(
path: PathLike,
options?:
| {
encoding: BufferEncoding | null;
withFileTypes?: false | undefined;
recursive?: boolean | undefined;
}
| BufferEncoding
| null,
): string[];
/**
* Synchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function readdirSync(
path: PathLike,
options:
| {
encoding: "buffer";
withFileTypes?: false | undefined;
recursive?: boolean | undefined;
}
| "buffer",
): Buffer[];
/**
* Synchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
*/
export function readdirSync(
path: PathLike,
options?:
|
| (ObjectEncodingOptions & {
withFileTypes?: false | undefined;
recursive?: boolean | undefined;
})
| BufferEncoding
| null,
): string[] | Buffer[];
/**
* Synchronous readdir(3) - read a directory.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param options If called with `withFileTypes: true` the result data will be an array of Dirent.
*/
export function readdirSync(
path: PathLike,
options: ObjectEncodingOptions & {
withFileTypes: true;
recursive?: boolean | undefined;
},
): Dirent[];
/**
* Closes the file descriptor. No arguments other than a possible exception are
* given to the completion callback.
*
* Calling `fs.close()` on any file descriptor (`fd`) that is currently in use
* through any other `fs` operation may lead to undefined behavior.
*
* See the POSIX [`close(2)`](http://man7.org/linux/man-pages/man2/close.2.html) documentation for more detail.
* @since v0.0.2
*/
export function close(fd: number, callback?: NoParamCallback): void;
export namespace close {
/**
* Asynchronous close(2) - close a file descriptor.
* @param fd A file descriptor.
*/
function __promisify__(fd: number): Promise<void>;
}
/**
* Closes the file descriptor. Returns `undefined`.
*
* Calling `fs.closeSync()` on any file descriptor (`fd`) that is currently in use
* through any other `fs` operation may lead to undefined behavior.
*
* See the POSIX [`close(2)`](http://man7.org/linux/man-pages/man2/close.2.html) documentation for more detail.
* @since v0.1.21
*/
export function closeSync(fd: number): void;
/**
* Asynchronous file open. See the POSIX [`open(2)`](http://man7.org/linux/man-pages/man2/open.2.html) documentation for more details.
*
* `mode` sets the file mode (permission and sticky bits), but only if the file was
* created. On Windows, only the write permission can be manipulated; see {@link chmod}.
*
* The callback gets two arguments `(err, fd)`.
*
* Some characters (`< > : " / \ | ? *`) are reserved under Windows as documented
* by [Naming Files, Paths, and Namespaces](https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file). Under NTFS, if the filename contains
* a colon, Node.js will open a file system stream, as described by [this MSDN page](https://docs.microsoft.com/en-us/windows/desktop/FileIO/using-streams).
*
* Functions based on `fs.open()` exhibit this behavior as well:`fs.writeFile()`, `fs.readFile()`, etc.
* @since v0.0.2
* @param [flags='r'] See `support of file system `flags``.
* @param [mode=0o666]
*/
export function open(
path: PathLike,
flags: OpenMode | undefined,
mode: Mode | undefined | null,
callback: (err: NodeJS.ErrnoException | null, fd: number) => void,
): void;
/**
* Asynchronous open(2) - open and possibly create a file. If the file is created, its mode will be `0o666`.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param [flags='r'] See `support of file system `flags``.
*/
export function open(
path: PathLike,
flags: OpenMode | undefined,
callback: (err: NodeJS.ErrnoException | null, fd: number) => void,
): void;
/**
* Asynchronous open(2) - open and possibly create a file. If the file is created, its mode will be `0o666`.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
*/
export function open(path: PathLike, callback: (err: NodeJS.ErrnoException | null, fd: number) => void): void;
export namespace open {
/**
* Asynchronous open(2) - open and possib |
ly create a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param mode A file mode. If a string is passed, it is parsed as an octal integer. If not supplied, defaults to `0o666`.
*/
function __promisify__(path: PathLike, flags: OpenMode, mode?: Mode | null): Promise<number>;
}
/**
* Returns an integer representing the file descriptor.
*
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link open}.
* @since v0.1.21
* @param [flags='r']
* @param [mode=0o666]
*/
export function openSync(path: PathLike, flags: OpenMode, mode?: Mode | null): number;
/**
* Change the file system timestamps of the object referenced by `path`.
*
* The `atime` and `mtime` arguments follow these rules:
*
* * Values can be either numbers representing Unix epoch time in seconds,`Date`s, or a numeric string like `'123456789.0'`.
* * If the value can not be converted to a number, or is `NaN`, `Infinity`, or`-Infinity`, an `Error` will be thrown.
* @since v0.4.2
*/
export function utimes(path: PathLike, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void;
export namespace utimes {
/**
* Asynchronously change file timestamps of the file referenced by the supplied path.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* @param atime The last access time. If a string is provided, it will be coerced to number.
* @param mtime The last modified time. If a string is provided, it will be coerced to number.
*/
function __promisify__(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>;
}
/**
* Returns `undefined`.
*
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link utimes}.
* @since v0.4.2
*/
export function utimesSync(path: PathLike, atime: TimeLike, mtime: TimeLike): void;
/**
* Change the file system timestamps of the object referenced by the supplied file
* descriptor. See {@link utimes}.
* @since v0.4.2
*/
export function futimes(fd: number, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void;
export namespace futimes {
/**
* Asynchronously change file timestamps of the file referenced by the supplied file descriptor.
* @param fd A file descriptor.
* @param atime The last access time. If a string is provided, it will be coerced to number.
* @param mtime The last modified time. If a string is provided, it will be coerced to number.
*/
function __promisify__(fd: number, atime: TimeLike, mtime: TimeLike): Promise<void>;
}
/**
* Synchronous version of {@link futimes}. Returns `undefined`.
* @since v0.4.2
*/
export function futimesSync(fd: number, atime: TimeLike, mtime: TimeLike): void;
/**
* Request that all data for the open file descriptor is flushed to the storage
* device. The specific implementation is operating system and device specific.
* Refer to the POSIX [`fsync(2)`](http://man7.org/linux/man-pages/man2/fsync.2.html) documentation for more detail. No arguments other
* than a possible exception are given to the completion callback.
* @since v0.1.96
*/
export function fsync(fd: number, callback: NoParamCallback): void;
export namespace fsync {
/**
* Asynchronous fsync(2) - synchronize a file's in-core state with the underlying storage device.
* @param fd A file descriptor.
*/
function __promisify__(fd: number): Promise<void>;
}
/**
* Request that all data for the open file descriptor is flushed to the storage
* device. The specific implementation is operating system and device sp |
ecific.
* Refer to the POSIX [`fsync(2)`](http://man7.org/linux/man-pages/man2/fsync.2.html) documentation for more detail. Returns `undefined`.
* @since v0.1.96
*/
export function fsyncSync(fd: number): void;
/**
* Write `buffer` to the file specified by `fd`.
*
* `offset` determines the part of the buffer to be written, and `length` is
* an integer specifying the number of bytes to write.
*
* `position` refers to the offset from the beginning of the file where this data
* should be written. If `typeof position !== 'number'`, the data will be written
* at the current position. See [`pwrite(2)`](http://man7.org/linux/man-pages/man2/pwrite.2.html).
*
* The callback will be given three arguments `(err, bytesWritten, buffer)` where`bytesWritten` specifies how many _bytes_ were written from `buffer`.
*
* If this method is invoked as its `util.promisify()` ed version, it returns
* a promise for an `Object` with `bytesWritten` and `buffer` properties.
*
* It is unsafe to use `fs.write()` multiple times on the same file without waiting
* for the callback. For this scenario, {@link createWriteStream} is
* recommended.
*
* On Linux, positional writes don't work when the file is opened in append mode.
* The kernel ignores the position argument and always appends the data to
* the end of the file.
* @since v0.0.2
* @param [offset=0]
* @param [length=buffer.byteLength - offset]
* @param [position='null']
*/
export function write<TBuffer extends NodeJS.ArrayBufferView>(
fd: number,
buffer: TBuffer,
offset: number | undefined | null,
length: number | undefined | null,
position: number | undefined | null,
callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void,
): void;
/**
* Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
* @param fd A file descriptor.
* @param offset The part of the buffer to be written. If not supplied, defaults to `0`.
* @param length The number of bytes to write. If not supplied, defaults to `buffer.length - offset`.
*/
export function write<TBuffer extends NodeJS.ArrayBufferView>(
fd: number,
buffer: TBuffer,
offset: number | undefined | null,
length: number | undefined | null,
callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void,
): void;
/**
* Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
* @param fd A file descriptor.
* @param offset The part of the buffer to be written. If not supplied, defaults to `0`.
*/
export function write<TBuffer extends NodeJS.ArrayBufferView>(
fd: number,
buffer: TBuffer,
offset: number | undefined | null,
callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void,
): void;
/**
* Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
* @param fd A file descriptor.
*/
export function write<TBuffer extends NodeJS.ArrayBufferView>(
fd: number,
buffer: TBuffer,
callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void,
): void;
/**
* Asynchronously writes `string` to the file referenced by the supplied file descriptor.
* @param fd A file descriptor.
* @param string A string to write.
* @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
* @param encoding The expected string encoding.
*/
export function write(
fd: number,
string: string,
position: number | undefined | null,
encoding: BufferEncoding | undefined |
| null,
callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void,
): void;
/**
* Asynchronously writes `string` to the file referenced by the supplied file descriptor.
* @param fd A file descriptor.
* @param string A string to write.
* @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
*/
export function write(
fd: number,
string: string,
position: number | undefined | null,
callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void,
): void;
/**
* Asynchronously writes `string` to the file referenced by the supplied file descriptor.
* @param fd A file descriptor.
* @param string A string to write.
*/
export function write(
fd: number,
string: string,
callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void,
): void;
export namespace write {
/**
* Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
* @param fd A file descriptor.
* @param offset The part of the buffer to be written. If not supplied, defaults to `0`.
* @param length The number of bytes to write. If not supplied, defaults to `buffer.length - offset`.
* @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
*/
function __promisify__<TBuffer extends NodeJS.ArrayBufferView>(
fd: number,
buffer?: TBuffer,
offset?: number,
length?: number,
position?: number | null,
): Promise<{
bytesWritten: number;
buffer: TBuffer;
}>;
/**
* Asynchronously writes `string` to the file referenced by the supplied file descriptor.
* @param fd A file descriptor.
* @param string A string to write.
* @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
* @param encoding The expected string encoding.
*/
function __promisify__(
fd: number,
string: string,
position?: number | null,
encoding?: BufferEncoding | null,
): Promise<{
bytesWritten: number;
buffer: string;
}>;
}
/**
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link write}.
* @since v0.1.21
* @param [offset=0]
* @param [length=buffer.byteLength - offset]
* @param [position='null']
* @return The number of bytes written.
*/
export function writeSync(
fd: number,
buffer: NodeJS.ArrayBufferView,
offset?: number | null,
length?: number | null,
position?: number | null,
): number;
/**
* Synchronously writes `string` to the file referenced by the supplied file descriptor, returning the number of bytes written.
* @param fd A file descriptor.
* @param string A string to write.
* @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
* @param encoding The expected string encoding.
*/
export function writeSync(
fd: number,
string: string,
position?: number | null,
encoding?: BufferEncoding | null,
): number;
export type ReadPosition = number | bigint;
export interface ReadSyncOptions {
/**
* @default 0
*/
offset?: number | undefined;
/**
* @default `length of buffer`
*/
length?: number | undefined;
/**
* @defaul |
t null
*/
position?: ReadPosition | null | undefined;
}
export interface ReadAsyncOptions<TBuffer extends NodeJS.ArrayBufferView> extends ReadSyncOptions {
buffer?: TBuffer;
}
/**
* Read data from the file specified by `fd`.
*
* The callback is given the three arguments, `(err, bytesRead, buffer)`.
*
* If the file is not modified concurrently, the end-of-file is reached when the
* number of bytes read is zero.
*
* If this method is invoked as its `util.promisify()` ed version, it returns
* a promise for an `Object` with `bytesRead` and `buffer` properties.
* @since v0.0.2
* @param buffer The buffer that the data will be written to.
* @param offset The position in `buffer` to write the data to.
* @param length The number of bytes to read.
* @param position Specifies where to begin reading from in the file. If `position` is `null` or `-1 `, data will be read from the current file position, and the file position will be updated. If
* `position` is an integer, the file position will be unchanged.
*/
export function read<TBuffer extends NodeJS.ArrayBufferView>(
fd: number,
buffer: TBuffer,
offset: number,
length: number,
position: ReadPosition | null,
callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void,
): void;
/**
* Similar to the above `fs.read` function, this version takes an optional `options` object.
* If not otherwise specified in an `options` object,
* `buffer` defaults to `Buffer.alloc(16384)`,
* `offset` defaults to `0`,
* `length` defaults to `buffer.byteLength`, `- offset` as of Node 17.6.0
* `position` defaults to `null`
* @since v12.17.0, 13.11.0
*/
export function read<TBuffer extends NodeJS.ArrayBufferView>(
fd: number,
options: ReadAsyncOptions<TBuffer>,
callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void,
): void;
export function read(
fd: number,
callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: NodeJS.ArrayBufferView) => void,
): void;
export namespace read {
/**
* @param fd A file descriptor.
* @param buffer The buffer that the data will be written to.
* @param offset The offset in the buffer at which to start writing.
* @param length The number of bytes to read.
* @param position The offset from the beginning of the file from which data should be read. If `null`, data will be read from the current position.
*/
function __promisify__<TBuffer extends NodeJS.ArrayBufferView>(
fd: number,
buffer: TBuffer,
offset: number,
length: number,
position: number | null,
): Promise<{
bytesRead: number;
buffer: TBuffer;
}>;
function __promisify__<TBuffer extends NodeJS.ArrayBufferView>(
fd: number,
options: ReadAsyncOptions<TBuffer>,
): Promise<{
bytesRead: number;
buffer: TBuffer;
}>;
function __promisify__(fd: number): Promise<{
bytesRead: number;
buffer: NodeJS.ArrayBufferView;
}>;
}
/**
* Returns the number of `bytesRead`.
*
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link read}.
* @since v0.1.21
* @param [position='null']
*/
export function readSync(
fd: number,
buffer: NodeJS.ArrayBufferView,
offset: number,
length: number,
position: ReadPosition | null,
): number;
/**
* Similar to the above `fs.readSync` function, this version takes an optional `options` object.
* If no `options` object is specified, it will default |
with the above values.
*/
export function readSync(fd: number, buffer: NodeJS.ArrayBufferView, opts?: ReadSyncOptions): number;
/**
* Asynchronously reads the entire contents of a file.
*
* ```js
* import { readFile } from 'node:fs';
*
* readFile('/etc/passwd', (err, data) => {
* if (err) throw err;
* console.log(data);
* });
* ```
*
* The callback is passed two arguments `(err, data)`, where `data` is the
* contents of the file.
*
* If no encoding is specified, then the raw buffer is returned.
*
* If `options` is a string, then it specifies the encoding:
*
* ```js
* import { readFile } from 'node:fs';
*
* readFile('/etc/passwd', 'utf8', callback);
* ```
*
* When the path is a directory, the behavior of `fs.readFile()` and {@link readFileSync} is platform-specific. On macOS, Linux, and Windows, an
* error will be returned. On FreeBSD, a representation of the directory's contents
* will be returned.
*
* ```js
* import { readFile } from 'node:fs';
*
* // macOS, Linux, and Windows
* readFile('<directory>', (err, data) => {
* // => [Error: EISDIR: illegal operation on a directory, read <directory>]
* });
*
* // FreeBSD
* readFile('<directory>', (err, data) => {
* // => null, <data>
* });
* ```
*
* It is possible to abort an ongoing request using an `AbortSignal`. If a
* request is aborted the callback is called with an `AbortError`:
*
* ```js
* import { readFile } from 'node:fs';
*
* const controller = new AbortController();
* const signal = controller.signal;
* readFile(fileInfo[0].name, { signal }, (err, buf) => {
* // ...
* });
* // When you want to abort the request
* controller.abort();
* ```
*
* The `fs.readFile()` function buffers the entire file. To minimize memory costs,
* when possible prefer streaming via `fs.createReadStream()`.
*
* Aborting an ongoing request does not abort individual operating
* system requests but rather the internal buffering `fs.readFile` performs.
* @since v0.1.29
* @param path filename or file descriptor
*/
export function readFile(
path: PathOrFileDescriptor,
options:
| ({
encoding?: null | undefined;
flag?: string | undefined;
} & Abortable)
| undefined
| null,
callback: (err: NodeJS.ErrnoException | null, data: Buffer) => void,
): void;
/**
* Asynchronously reads the entire contents of a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
* If a flag is not provided, it defaults to `'r'`.
*/
export function readFile(
path: PathOrFileDescriptor,
options:
| ({
encoding: BufferEncoding;
flag?: string | undefined;
} & Abortable)
| BufferEncoding,
callback: (err: NodeJS.ErrnoException | null, data: string) => void,
): void;
/**
* Asynchronously reads the entire contents of a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
* If a flag is not provided, it defaults to `'r'`.
*/
export function readFile(
path: PathOrFileDescriptor,
options:
| (ObjectEncodingOp |
tions & {
flag?: string | undefined;
} & Abortable)
| BufferEncoding
| undefined
| null,
callback: (err: NodeJS.ErrnoException | null, data: string | Buffer) => void,
): void;
/**
* Asynchronously reads the entire contents of a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
*/
export function readFile(
path: PathOrFileDescriptor,
callback: (err: NodeJS.ErrnoException | null, data: Buffer) => void,
): void;
export namespace readFile {
/**
* Asynchronously reads the entire contents of a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param options An object that may contain an optional flag.
* If a flag is not provided, it defaults to `'r'`.
*/
function __promisify__(
path: PathOrFileDescriptor,
options?: {
encoding?: null | undefined;
flag?: string | undefined;
} | null,
): Promise<Buffer>;
/**
* Asynchronously reads the entire contents of a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* URL support is _experimental_.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
* If a flag is not provided, it defaults to `'r'`.
*/
function __promisify__(
path: PathOrFileDescriptor,
options:
| {
encoding: BufferEncoding;
flag?: string | undefined;
}
| BufferEncoding,
): Promise<string>;
/**
* Asynchronously reads the entire contents of a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* URL support is _experimental_.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
* If a flag is not provided, it defaults to `'r'`.
*/
function __promisify__(
path: PathOrFileDescriptor,
options?:
| (ObjectEncodingOptions & {
flag?: string | undefined;
})
| BufferEncoding
| null,
): Promise<string | Buffer>;
}
/**
* Returns the contents of the `path`.
*
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link readFile}.
*
* If the `encoding` option is specified then this function returns a
* string. Otherwise it returns a buffer.
*
* Similar to {@link readFile}, when the path is a directory, the behavior of`fs.readFileSync()` is platform-specific.
*
* ```js
* import { readFileSync } from 'node:fs';
*
* // macOS, Linux, and Windows
* readFileSync('<directory>');
* // => [Error: EISDIR: illegal operation on a directory, read <directory>]
*
* // FreeBSD
* readFileSync('<directory>'); // => <data>
* ```
* @since v0.1.8
* @param path filename or file descriptor
*/
export function readFileSync(
path: PathOrFileDescriptor,
options?: {
encoding?: null | undefined;
flag?: string | undefined;
} | null,
): Buffer;
|
/**
* Synchronously reads the entire contents of a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
* If a flag is not provided, it defaults to `'r'`.
*/
export function readFileSync(
path: PathOrFileDescriptor,
options:
| {
encoding: BufferEncoding;
flag?: string | undefined;
}
| BufferEncoding,
): string;
/**
* Synchronously reads the entire contents of a file.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
* If a flag is not provided, it defaults to `'r'`.
*/
export function readFileSync(
path: PathOrFileDescriptor,
options?:
| (ObjectEncodingOptions & {
flag?: string | undefined;
})
| BufferEncoding
| null,
): string | Buffer;
export type WriteFileOptions =
| (
& ObjectEncodingOptions
& Abortable
& {
mode?: Mode | undefined;
flag?: string | undefined;
flush?: boolean | undefined;
}
)
| BufferEncoding
| null;
/**
* When `file` is a filename, asynchronously writes data to the file, replacing the
* file if it already exists. `data` can be a string or a buffer.
*
* When `file` is a file descriptor, the behavior is similar to calling`fs.write()` directly (which is recommended). See the notes below on using
* a file descriptor.
*
* The `encoding` option is ignored if `data` is a buffer.
*
* The `mode` option only affects the newly created file. See {@link open} for more details.
*
* ```js
* import { writeFile } from 'node:fs';
* import { Buffer } from 'node:buffer';
*
* const data = new Uint8Array(Buffer.from('Hello Node.js'));
* writeFile('message.txt', data, (err) => {
* if (err) throw err;
* console.log('The file has been saved!');
* });
* ```
*
* If `options` is a string, then it specifies the encoding:
*
* ```js
* import { writeFile } from 'node:fs';
*
* writeFile('message.txt', 'Hello Node.js', 'utf8', callback);
* ```
*
* It is unsafe to use `fs.writeFile()` multiple times on the same file without
* waiting for the callback. For this scenario, {@link createWriteStream} is
* recommended.
*
* Similarly to `fs.readFile` \- `fs.writeFile` is a convenience method that
* performs multiple `write` calls internally to write the buffer passed to it.
* For performance sensitive code consider using {@link createWriteStream}.
*
* It is possible to use an `AbortSignal` to cancel an `fs.writeFile()`.
* Cancelation is "best effort", and some amount of data is likely still
* to be written.
*
* ```js
* import { writeFile } from 'node:fs';
* import { Buffer } from 'node:buffer';
*
* const controller = new AbortController();
* const { signal } = controller;
* const data = new Uint8Array(Buffer.from('Hello Node.js'));
* writeFile('message.txt', data, { signal }, (err) => {
* // When a request is aborted - the callback is called with an AbortError
* });
* // When the request should be aborted
* controller.abort();
* ```
*
* Aborting an ongoing request does not abort individual operating
* syste |
m requests but rather the internal buffering `fs.writeFile` performs.
* @since v0.1.29
* @param file filename or file descriptor
*/
export function writeFile(
file: PathOrFileDescriptor,
data: string | NodeJS.ArrayBufferView,
options: WriteFileOptions,
callback: NoParamCallback,
): void;
/**
* Asynchronously writes data to a file, replacing the file if it already exists.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
*/
export function writeFile(
path: PathOrFileDescriptor,
data: string | NodeJS.ArrayBufferView,
callback: NoParamCallback,
): void;
export namespace writeFile {
/**
* Asynchronously writes data to a file, replacing the file if it already exists.
* @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
* URL support is _experimental_.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
* @param options Either the encoding for the file, or an object optionally specifying the encoding, file mode, and flag.
* If `encoding` is not supplied, the default of `'utf8'` is used.
* If `mode` is not supplied, the default of `0o666` is used.
* If `mode` is a string, it is parsed as an octal integer.
* If `flag` is not supplied, the default of `'w'` is used.
*/
function __promisify__(
path: PathOrFileDescriptor,
data: string | NodeJS.ArrayBufferView,
options?: WriteFileOptions,
): Promise<void>;
}
/**
* Returns `undefined`.
*
* The `mode` option only affects the newly created file. See {@link open} for more details.
*
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link writeFile}.
* @since v0.1.29
* @param file filename or file descriptor
*/
export function writeFileSync(
file: PathOrFileDescriptor,
data: string | NodeJS.ArrayBufferView,
options?: WriteFileOptions,
): void;
/**
* Asynchronously append data to a file, creating the file if it does not yet
* exist. `data` can be a string or a `Buffer`.
*
* The `mode` option only affects the newly created file. See {@link open} for more details.
*
* ```js
* import { appendFile } from 'node:fs';
*
* appendFile('message.txt', 'data to append', (err) => {
* if (err) throw err;
* console.log('The "data to append" was appended to file!');
* });
* ```
*
* If `options` is a string, then it specifies the encoding:
*
* ```js
* import { appendFile } from 'node:fs';
*
* appendFile('message.txt', 'data to append', 'utf8', callback);
* ```
*
* The `path` may be specified as a numeric file descriptor that has been opened
* for appending (using `fs.open()` or `fs.openSync()`). The file descriptor will
* not be closed automatically.
*
* ```js
* import { open, close, appendFile } from 'node:fs';
*
* function closeFd(fd) {
* close(fd, (err) => {
* if (err) throw err;
* });
* }
*
* open('message.txt', 'a', (err, fd) => {
* if (err) throw err;
*
* try {
* appendFile(fd, 'data to append', 'utf8', (err) => {
* closeFd(fd);
* if (err) throw err;
* });
* } catch (err) {
* closeFd(fd);
|
* throw err;
* }
* });
* ```
* @since v0.6.7
* @param path filename or file descriptor
*/
export function appendFile(
path: PathOrFileDescriptor,
data: string | Uint8Array,
options: WriteFileOptions,
callback: NoParamCallback,
): void;
/**
* Asynchronously append data to a file, creating the file if it does not exist.
* @param file A path to a file. If a URL is provided, it must use the `file:` protocol.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
*/
export function appendFile(file: PathOrFileDescriptor, data: string | Uint8Array, callback: NoParamCallback): void;
export namespace appendFile {
/**
* Asynchronously append data to a file, creating the file if it does not exist.
* @param file A path to a file. If a URL is provided, it must use the `file:` protocol.
* URL support is _experimental_.
* If a file descriptor is provided, the underlying file will _not_ be closed automatically.
* @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
* @param options Either the encoding for the file, or an object optionally specifying the encoding, file mode, and flag.
* If `encoding` is not supplied, the default of `'utf8'` is used.
* If `mode` is not supplied, the default of `0o666` is used.
* If `mode` is a string, it is parsed as an octal integer.
* If `flag` is not supplied, the default of `'a'` is used.
*/
function __promisify__(
file: PathOrFileDescriptor,
data: string | Uint8Array,
options?: WriteFileOptions,
): Promise<void>;
}
/**
* Synchronously append data to a file, creating the file if it does not yet
* exist. `data` can be a string or a `Buffer`.
*
* The `mode` option only affects the newly created file. See {@link open} for more details.
*
* ```js
* import { appendFileSync } from 'node:fs';
*
* try {
* appendFileSync('message.txt', 'data to append');
* console.log('The "data to append" was appended to file!');
* } catch (err) {
* // Handle the error
* }
* ```
*
* If `options` is a string, then it specifies the encoding:
*
* ```js
* import { appendFileSync } from 'node:fs';
*
* appendFileSync('message.txt', 'data to append', 'utf8');
* ```
*
* The `path` may be specified as a numeric file descriptor that has been opened
* for appending (using `fs.open()` or `fs.openSync()`). The file descriptor will
* not be closed automatically.
*
* ```js
* import { openSync, closeSync, appendFileSync } from 'node:fs';
*
* let fd;
*
* try {
* fd = openSync('message.txt', 'a');
* appendFileSync(fd, 'data to append', 'utf8');
* } catch (err) {
* // Handle the error
* } finally {
* if (fd !== undefined)
* closeSync(fd);
* }
* ```
* @since v0.6.7
* @param path filename or file descriptor
*/
export function appendFileSync(
path: PathOrFileDescriptor,
data: string | Uint8Array,
options?: WriteFileOptions,
): void;
/**
* Watch for changes on `filename`. The callback `listener` will be called each
* time the file is accessed.
*
* The `options` argument may be omitted. If provided, it should be an object. The`options` object may contain a boolean named `persistent` that indicates
* whether the process should continue to run as long as files are being watched.
* The `options` object may specify an `interval` property ind |
icating how often the
* target should be polled in milliseconds.
*
* The `listener` gets two arguments the current stat object and the previous
* stat object:
*
* ```js
* import { watchFile } from 'fs';
*
* watchFile('message.text', (curr, prev) => {
* console.log(`the current mtime is: ${curr.mtime}`);
* console.log(`the previous mtime was: ${prev.mtime}`);
* });
* ```
*
* These stat objects are instances of `fs.Stat`. If the `bigint` option is `true`,
* the numeric values in these objects are specified as `BigInt`s.
*
* To be notified when the file was modified, not just accessed, it is necessary
* to compare `curr.mtimeMs` and `prev.mtimeMs`.
*
* When an `fs.watchFile` operation results in an `ENOENT` error, it
* will invoke the listener once, with all the fields zeroed (or, for dates, the
* Unix Epoch). If the file is created later on, the listener will be called
* again, with the latest stat objects. This is a change in functionality since
* v0.10.
*
* Using {@link watch} is more efficient than `fs.watchFile` and`fs.unwatchFile`. `fs.watch` should be used instead of `fs.watchFile` and`fs.unwatchFile` when possible.
*
* When a file being watched by `fs.watchFile()` disappears and reappears,
* then the contents of `previous` in the second callback event (the file's
* reappearance) will be the same as the contents of `previous` in the first
* callback event (its disappearance).
*
* This happens when:
*
* * the file is deleted, followed by a restore
* * the file is renamed and then renamed a second time back to its original name
* @since v0.1.31
*/
export interface WatchFileOptions {
bigint?: boolean | undefined;
persistent?: boolean | undefined;
interval?: number | undefined;
}
/**
* Watch for changes on `filename`. The callback `listener` will be called each
* time the file is accessed.
*
* The `options` argument may be omitted. If provided, it should be an object. The`options` object may contain a boolean named `persistent` that indicates
* whether the process should continue to run as long as files are being watched.
* The `options` object may specify an `interval` property indicating how often the
* target should be polled in milliseconds.
*
* The `listener` gets two arguments the current stat object and the previous
* stat object:
*
* ```js
* import { watchFile } from 'node:fs';
*
* watchFile('message.text', (curr, prev) => {
* console.log(`the current mtime is: ${curr.mtime}`);
* console.log(`the previous mtime was: ${prev.mtime}`);
* });
* ```
*
* These stat objects are instances of `fs.Stat`. If the `bigint` option is `true`,
* the numeric values in these objects are specified as `BigInt`s.
*
* To be notified when the file was modified, not just accessed, it is necessary
* to compare `curr.mtimeMs` and `prev.mtimeMs`.
*
* When an `fs.watchFile` operation results in an `ENOENT` error, it
* will invoke the listener once, with all the fields zeroed (or, for dates, the
* Unix Epoch). If the file is created later on, the listener will be called
* again, with the latest stat objects. This is a change in functionality since
* v0.10.
*
* Using {@link watch} is more efficient than `fs.watchFile` and`fs.unwatchFile`. `fs.watch` should be used instead of `fs.watchFile` and`fs.unwatchFile` when possible.
*
* When a file being watched by `fs.watchFile()` disappears and reappears,
* then the contents of `previous` in the second callback event (the file's
* reappearance) will be the same as the contents of `previous` in the first
* callback event (its disappearance).
*
* This happens when:
*
|
* * the file is deleted, followed by a restore
* * the file is renamed and then renamed a second time back to its original name
* @since v0.1.31
*/
export function watchFile(
filename: PathLike,
options:
| (WatchFileOptions & {
bigint?: false | undefined;
})
| undefined,
listener: StatsListener,
): StatWatcher;
export function watchFile(
filename: PathLike,
options:
| (WatchFileOptions & {
bigint: true;
})
| undefined,
listener: BigIntStatsListener,
): StatWatcher;
/**
* Watch for changes on `filename`. The callback `listener` will be called each time the file is accessed.
* @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
*/
export function watchFile(filename: PathLike, listener: StatsListener): StatWatcher;
/**
* Stop watching for changes on `filename`. If `listener` is specified, only that
* particular listener is removed. Otherwise, _all_ listeners are removed,
* effectively stopping watching of `filename`.
*
* Calling `fs.unwatchFile()` with a filename that is not being watched is a
* no-op, not an error.
*
* Using {@link watch} is more efficient than `fs.watchFile()` and`fs.unwatchFile()`. `fs.watch()` should be used instead of `fs.watchFile()`and `fs.unwatchFile()` when possible.
* @since v0.1.31
* @param listener Optional, a listener previously attached using `fs.watchFile()`
*/
export function unwatchFile(filename: PathLike, listener?: StatsListener): void;
export function unwatchFile(filename: PathLike, listener?: BigIntStatsListener): void;
export interface WatchOptions extends Abortable {
encoding?: BufferEncoding | "buffer" | undefined;
persistent?: boolean | undefined;
recursive?: boolean | undefined;
}
export type WatchEventType = "rename" | "change";
export type WatchListener<T> = (event: WatchEventType, filename: T | null) => void;
export type StatsListener = (curr: Stats, prev: Stats) => void;
export type BigIntStatsListener = (curr: BigIntStats, prev: BigIntStats) => void;
/**
* Watch for changes on `filename`, where `filename` is either a file or a
* directory.
*
* The second argument is optional. If `options` is provided as a string, it
* specifies the `encoding`. Otherwise `options` should be passed as an object.
*
* The listener callback gets two arguments `(eventType, filename)`. `eventType`is either `'rename'` or `'change'`, and `filename` is the name of the file
* which triggered the event.
*
* On most platforms, `'rename'` is emitted whenever a filename appears or
* disappears in the directory.
*
* The listener callback is attached to the `'change'` event fired by `fs.FSWatcher`, but it is not the same thing as the `'change'` value of`eventType`.
*
* If a `signal` is passed, aborting the corresponding AbortController will close
* the returned `fs.FSWatcher`.
* @since v0.5.10
* @param listener
*/
export function watch(
filename: PathLike,
options:
| (WatchOptions & {
encoding: "buffer";
})
| "buffer",
listener?: WatchListener<Buffer>,
): FSWatcher;
/**
* Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`.
* @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
* @param options Either the encoding for the filename provided to the listener, or an object optionally specifying encoding, persistent, and recursive options.
* If `encoding` is not supplied, the default of `'utf8'` is used.
* If `persistent` is not supplied, the |
default of `true` is used.
* If `recursive` is not supplied, the default of `false` is used.
*/
export function watch(
filename: PathLike,
options?: WatchOptions | BufferEncoding | null,
listener?: WatchListener<string>,
): FSWatcher;
/**
* Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`.
* @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
* @param options Either the encoding for the filename provided to the listener, or an object optionally specifying encoding, persistent, and recursive options.
* If `encoding` is not supplied, the default of `'utf8'` is used.
* If `persistent` is not supplied, the default of `true` is used.
* If `recursive` is not supplied, the default of `false` is used.
*/
export function watch(
filename: PathLike,
options: WatchOptions | string,
listener?: WatchListener<string | Buffer>,
): FSWatcher;
/**
* Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`.
* @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
*/
export function watch(filename: PathLike, listener?: WatchListener<string>): FSWatcher;
/**
* Test whether or not the given path exists by checking with the file system.
* Then call the `callback` argument with either true or false:
*
* ```js
* import { exists } from 'node:fs';
*
* exists('/etc/passwd', (e) => {
* console.log(e ? 'it exists' : 'no passwd!');
* });
* ```
*
* **The parameters for this callback are not consistent with other Node.js**
* **callbacks.** Normally, the first parameter to a Node.js callback is an `err`parameter, optionally followed by other parameters. The `fs.exists()` callback
* has only one boolean parameter. This is one reason `fs.access()` is recommended
* instead of `fs.exists()`.
*
* Using `fs.exists()` to check for the existence of a file before calling`fs.open()`, `fs.readFile()`, or `fs.writeFile()` is not recommended. Doing
* so introduces a race condition, since other processes may change the file's
* state between the two calls. Instead, user code should open/read/write the
* file directly and handle the error raised if the file does not exist.
*
* **write (NOT RECOMMENDED)**
*
* ```js
* import { exists, open, close } from 'node:fs';
*
* exists('myfile', (e) => {
* if (e) {
* console.error('myfile already exists');
* } else {
* open('myfile', 'wx', (err, fd) => {
* if (err) throw err;
*
* try {
* writeMyData(fd);
* } finally {
* close(fd, (err) => {
* if (err) throw err;
* });
* }
* });
* }
* });
* ```
*
* **write (RECOMMENDED)**
*
* ```js
* import { open, close } from 'node:fs';
* open('myfile', 'wx', (err, fd) => {
* if (err) {
* if (err.code === 'EEXIST') {
* console.error('myfile already exists');
* return;
* }
*
* throw err;
* }
*
* try {
* writeMyData(fd);
* } finally {
* close(fd, (err) => {
* if (err) throw err;
* });
* }
* });
* ```
*
* **read (NOT RECOMMENDED)**
*
* ```js
* import { open, close, exists } from 'node:fs';
*
* exists('myfile', (e) => {
* if (e) {
* open('myfile', 'r', (err, fd) => {
* if (err) throw err;
*
* try {
* readMyData(fd);
* } finally {
* close(fd, (err) => {
* if (err) throw err;
|
* });
* }
* });
* } else {
* console.error('myfile does not exist');
* }
* });
* ```
*
* **read (RECOMMENDED)**
*
* ```js
* import { open, close } from 'node:fs';
*
* open('myfile', 'r', (err, fd) => {
* if (err) {
* if (err.code === 'ENOENT') {
* console.error('myfile does not exist');
* return;
* }
*
* throw err;
* }
*
* try {
* readMyData(fd);
* } finally {
* close(fd, (err) => {
* if (err) throw err;
* });
* }
* });
* ```
*
* The "not recommended" examples above check for existence and then use the
* file; the "recommended" examples are better because they use the file directly
* and handle the error, if any.
*
* In general, check for the existence of a file only if the file won't be
* used directly, for example when its existence is a signal from another
* process.
* @since v0.0.2
* @deprecated Since v1.0.0 - Use {@link stat} or {@link access} instead.
*/
export function exists(path: PathLike, callback: (exists: boolean) => void): void;
/** @deprecated */
export namespace exists {
/**
* @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
* URL support is _experimental_.
*/
function __promisify__(path: PathLike): Promise<boolean>;
}
/**
* Returns `true` if the path exists, `false` otherwise.
*
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link exists}.
*
* `fs.exists()` is deprecated, but `fs.existsSync()` is not. The `callback`parameter to `fs.exists()` accepts parameters that are inconsistent with other
* Node.js callbacks. `fs.existsSync()` does not use a callback.
*
* ```js
* import { existsSync } from 'node:fs';
*
* if (existsSync('/etc/passwd'))
* console.log('The path exists.');
* ```
* @since v0.1.21
*/
export function existsSync(path: PathLike): boolean;
export namespace constants {
// File Access Constants
/** Constant for fs.access(). File is visible to the calling process. */
const F_OK: number;
/** Constant for fs.access(). File can be read by the calling process. */
const R_OK: number;
/** Constant for fs.access(). File can be written by the calling process. */
const W_OK: number;
/** Constant for fs.access(). File can be executed by the calling process. */
const X_OK: number;
// File Copy Constants
/** Constant for fs.copyFile. Flag indicating the destination file should not be overwritten if it already exists. */
const COPYFILE_EXCL: number;
/**
* Constant for fs.copyFile. copy operation will attempt to create a copy-on-write reflink.
* If the underlying platform does not support copy-on-write, then a fallback copy mechanism is used.
*/
const COPYFILE_FICLONE: number;
/**
* Constant for fs.copyFile. Copy operation will attempt to create a copy-on-write reflink.
* If the underlying platform does not support copy-on-write, then the operation will fail with an error.
*/
const COPYFILE_FICLONE_FORCE: number;
// File Open Constants
/** Constant for fs.open(). Flag indicating to open a file for read-only access. */
const O_RDONLY: number;
/** Constant for fs.open(). Flag indicating to open a file for write-only access. */
const O_WRONLY: number;
/** Constant for fs.open(). Flag indicating to open a file for read-write access. */
const O_RDWR: number;
/** Constant for fs.open(). Flag indicating to create the file if it does not already ex |
ist. */
const O_CREAT: number;
/** Constant for fs.open(). Flag indicating that opening a file should fail if the O_CREAT flag is set and the file already exists. */
const O_EXCL: number;
/**
* Constant for fs.open(). Flag indicating that if path identifies a terminal device,
* opening the path shall not cause that terminal to become the controlling terminal for the process
* (if the process does not already have one).
*/
const O_NOCTTY: number;
/** Constant for fs.open(). Flag indicating that if the file exists and is a regular file, and the file is opened successfully for write access, its length shall be truncated to zero. */
const O_TRUNC: number;
/** Constant for fs.open(). Flag indicating that data will be appended to the end of the file. */
const O_APPEND: number;
/** Constant for fs.open(). Flag indicating that the open should fail if the path is not a directory. */
const O_DIRECTORY: number;
/**
* constant for fs.open().
* Flag indicating reading accesses to the file system will no longer result in
* an update to the atime information associated with the file.
* This flag is available on Linux operating systems only.
*/
const O_NOATIME: number;
/** Constant for fs.open(). Flag indicating that the open should fail if the path is a symbolic link. */
const O_NOFOLLOW: number;
/** Constant for fs.open(). Flag indicating that the file is opened for synchronous I/O. */
const O_SYNC: number;
/** Constant for fs.open(). Flag indicating that the file is opened for synchronous I/O with write operations waiting for data integrity. */
const O_DSYNC: number;
/** Constant for fs.open(). Flag indicating to open the symbolic link itself rather than the resource it is pointing to. */
const O_SYMLINK: number;
/** Constant for fs.open(). When set, an attempt will be made to minimize caching effects of file I/O. */
const O_DIRECT: number;
/** Constant for fs.open(). Flag indicating to open the file in nonblocking mode when possible. */
const O_NONBLOCK: number;
// File Type Constants
/** Constant for fs.Stats mode property for determining a file's type. Bit mask used to extract the file type code. */
const S_IFMT: number;
/** Constant for fs.Stats mode property for determining a file's type. File type constant for a regular file. */
const S_IFREG: number;
/** Constant for fs.Stats mode property for determining a file's type. File type constant for a directory. */
const S_IFDIR: number;
/** Constant for fs.Stats mode property for determining a file's type. File type constant for a character-oriented device file. */
const S_IFCHR: number;
/** Constant for fs.Stats mode property for determining a file's type. File type constant for a block-oriented device file. */
const S_IFBLK: number;
/** Constant for fs.Stats mode property for determining a file's type. File type constant for a FIFO/pipe. */
const S_IFIFO: number;
/** Constant for fs.Stats mode property for determining a file's type. File type constant for a symbolic link. */
const S_IFLNK: number;
/** Constant for fs.Stats mode property for determining a file's type. File type constant for a socket. */
const S_IFSOCK: number;
// File Mode Constants
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by owner. */
const S_IRWXU: number;
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by owner. */
const S_IRUSR: number;
/** Constant for fs.Stats mode property for determining ac |
cess permissions for a file. File mode indicating writable by owner. */
const S_IWUSR: number;
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by owner. */
const S_IXUSR: number;
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by group. */
const S_IRWXG: number;
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by group. */
const S_IRGRP: number;
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by group. */
const S_IWGRP: number;
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by group. */
const S_IXGRP: number;
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by others. */
const S_IRWXO: number;
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by others. */
const S_IROTH: number;
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by others. */
const S_IWOTH: number;
/** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by others. */
const S_IXOTH: number;
/**
* When set, a memory file mapping is used to access the file. This flag
* is available on Windows operating systems only. On other operating systems,
* this flag is ignored.
*/
const UV_FS_O_FILEMAP: number;
}
/**
* Tests a user's permissions for the file or directory specified by `path`.
* The `mode` argument is an optional integer that specifies the accessibility
* checks to be performed. `mode` should be either the value `fs.constants.F_OK`or a mask consisting of the bitwise OR of any of `fs.constants.R_OK`,`fs.constants.W_OK`, and `fs.constants.X_OK`
* (e.g.`fs.constants.W_OK | fs.constants.R_OK`). Check `File access constants` for
* possible values of `mode`.
*
* The final argument, `callback`, is a callback function that is invoked with
* a possible error argument. If any of the accessibility checks fail, the error
* argument will be an `Error` object. The following examples check if`package.json` exists, and if it is readable or writable.
*
* ```js
* import { access, constants } from 'node:fs';
*
* const file = 'package.json';
*
* // Check if the file exists in the current directory.
* access(file, constants.F_OK, (err) => {
* console.log(`${file} ${err ? 'does not exist' : 'exists'}`);
* });
*
* // Check if the file is readable.
* access(file, constants.R_OK, (err) => {
* console.log(`${file} ${err ? 'is not readable' : 'is readable'}`);
* });
*
* // Check if the file is writable.
* access(file, constants.W_OK, (err) => {
* console.log(`${file} ${err ? 'is not writable' : 'is writable'}`);
* });
*
* // Check if the file is readable and writable.
* access(file, constants.R_OK | constants.W_OK, (err) => {
* console.log(`${file} ${err ? 'is not' : 'is'} readable and writable`);
* });
* ```
*
* Do not use `fs.access()` to check for the accessibility of a file before calling`fs.open()`, `fs.readFile()`, or `fs.writeFile()`. Doing
* so introduces a race condition, since other processes may change the file's
* state between the two calls. Instead, user code should open/read/write the
* file directly and hand |
le the error raised if the file is not accessible.
*
* **write (NOT RECOMMENDED)**
*
* ```js
* import { access, open, close } from 'node:fs';
*
* access('myfile', (err) => {
* if (!err) {
* console.error('myfile already exists');
* return;
* }
*
* open('myfile', 'wx', (err, fd) => {
* if (err) throw err;
*
* try {
* writeMyData(fd);
* } finally {
* close(fd, (err) => {
* if (err) throw err;
* });
* }
* });
* });
* ```
*
* **write (RECOMMENDED)**
*
* ```js
* import { open, close } from 'node:fs';
*
* open('myfile', 'wx', (err, fd) => {
* if (err) {
* if (err.code === 'EEXIST') {
* console.error('myfile already exists');
* return;
* }
*
* throw err;
* }
*
* try {
* writeMyData(fd);
* } finally {
* close(fd, (err) => {
* if (err) throw err;
* });
* }
* });
* ```
*
* **read (NOT RECOMMENDED)**
*
* ```js
* import { access, open, close } from 'node:fs';
* access('myfile', (err) => {
* if (err) {
* if (err.code === 'ENOENT') {
* console.error('myfile does not exist');
* return;
* }
*
* throw err;
* }
*
* open('myfile', 'r', (err, fd) => {
* if (err) throw err;
*
* try {
* readMyData(fd);
* } finally {
* close(fd, (err) => {
* if (err) throw err;
* });
* }
* });
* });
* ```
*
* **read (RECOMMENDED)**
*
* ```js
* import { open, close } from 'node:fs';
*
* open('myfile', 'r', (err, fd) => {
* if (err) {
* if (err.code === 'ENOENT') {
* console.error('myfile does not exist');
* return;
* }
*
* throw err;
* }
*
* try {
* readMyData(fd);
* } finally {
* close(fd, (err) => {
* if (err) throw err;
* });
* }
* });
* ```
*
* The "not recommended" examples above check for accessibility and then use the
* file; the "recommended" examples are better because they use the file directly
* and handle the error, if any.
*
* In general, check for the accessibility of a file only if the file will not be
* used directly, for example when its accessibility is a signal from another
* process.
*
* On Windows, access-control policies (ACLs) on a directory may limit access to
* a file or directory. The `fs.access()` function, however, does not check the
* ACL and therefore may report that a path is accessible even if the ACL restricts
* the user from reading or writing to it.
* @since v0.11.15
* @param [mode=fs.constants.F_OK]
*/
export function access(path: PathLike, mode: number | undefined, callback: NoParamCallback): void;
/**
* Asynchronously tests a user's permissions for the file specified by path.
* @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
*/
export function access(path: PathLike, callback: NoParamCallback): void;
export namespace access {
/**
* Asynchronously tests a user's permissions for the file specified by path.
* @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
* URL support is _experimental_.
*/
function __promisify__(path: PathLike, mode?: number): Promise<void>;
}
/**
* Synchronously tests a user's permissions for the file or directory specified
* by `path`. The `mode` argument is an optional integer that specifies the
|
* accessibility checks to be performed. `mode` should be either the value`fs.constants.F_OK` or a mask consisting of the bitwise OR of any of`fs.constants.R_OK`, `fs.constants.W_OK`, and
* `fs.constants.X_OK` (e.g.`fs.constants.W_OK | fs.constants.R_OK`). Check `File access constants` for
* possible values of `mode`.
*
* If any of the accessibility checks fail, an `Error` will be thrown. Otherwise,
* the method will return `undefined`.
*
* ```js
* import { accessSync, constants } from 'node:fs';
*
* try {
* accessSync('etc/passwd', constants.R_OK | constants.W_OK);
* console.log('can read/write');
* } catch (err) {
* console.error('no access!');
* }
* ```
* @since v0.11.15
* @param [mode=fs.constants.F_OK]
*/
export function accessSync(path: PathLike, mode?: number): void;
interface StreamOptions {
flags?: string | undefined;
encoding?: BufferEncoding | undefined;
fd?: number | promises.FileHandle | undefined;
mode?: number | undefined;
autoClose?: boolean | undefined;
emitClose?: boolean | undefined;
start?: number | undefined;
signal?: AbortSignal | null | undefined;
highWaterMark?: number | undefined;
}
interface FSImplementation {
open?: (...args: any[]) => any;
close?: (...args: any[]) => any;
}
interface CreateReadStreamFSImplementation extends FSImplementation {
read: (...args: any[]) => any;
}
interface CreateWriteStreamFSImplementation extends FSImplementation {
write: (...args: any[]) => any;
writev?: (...args: any[]) => any;
}
interface ReadStreamOptions extends StreamOptions {
fs?: CreateReadStreamFSImplementation | null | undefined;
end?: number | undefined;
}
interface WriteStreamOptions extends StreamOptions {
fs?: CreateWriteStreamFSImplementation | null | undefined;
flush?: boolean | undefined;
}
/**
* Unlike the 16 KiB default `highWaterMark` for a `stream.Readable`, the stream
* returned by this method has a default `highWaterMark` of 64 KiB.
*
* `options` can include `start` and `end` values to read a range of bytes from
* the file instead of the entire file. Both `start` and `end` are inclusive and
* start counting at 0, allowed values are in the
* \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. If `fd` is specified and `start` is
* omitted or `undefined`, `fs.createReadStream()` reads sequentially from the
* current file position. The `encoding` can be any one of those accepted by `Buffer`.
*
* If `fd` is specified, `ReadStream` will ignore the `path` argument and will use
* the specified file descriptor. This means that no `'open'` event will be
* emitted. `fd` should be blocking; non-blocking `fd`s should be passed to `net.Socket`.
*
* If `fd` points to a character device that only supports blocking reads
* (such as keyboard or sound card), read operations do not finish until data is
* available. This can prevent the process from exiting and the stream from
* closing naturally.
*
* By default, the stream will emit a `'close'` event after it has been
* destroyed. Set the `emitClose` option to `false` to change this behavior.
*
* By providing the `fs` option, it is possible to override the corresponding `fs`implementations for `open`, `read`, and `close`. When providing the `fs` option,
* an override for `read` is required. If no `fd` is provided, an override for`open` is also required. If `autoClose` is `true`, an override for `close` is
* also required.
*
* ```js
* import { createReadStream } from 'node:fs';
*
* // Create a stream from some character device.
|
* const stream = createReadStream('/dev/input/event0');
* setTimeout(() => {
* stream.close(); // This may not close the stream.
* // Artificially marking end-of-stream, as if the underlying resource had
* // indicated end-of-file by itself, allows the stream to close.
* // This does not cancel pending read operations, and if there is such an
* // operation, the process may still not be able to exit successfully
* // until it finishes.
* stream.push(null);
* stream.read(0);
* }, 100);
* ```
*
* If `autoClose` is false, then the file descriptor won't be closed, even if
* there's an error. It is the application's responsibility to close it and make
* sure there's no file descriptor leak. If `autoClose` is set to true (default
* behavior), on `'error'` or `'end'` the file descriptor will be closed
* automatically.
*
* `mode` sets the file mode (permission and sticky bits), but only if the
* file was created.
*
* An example to read the last 10 bytes of a file which is 100 bytes long:
*
* ```js
* import { createReadStream } from 'node:fs';
*
* createReadStream('sample.txt', { start: 90, end: 99 });
* ```
*
* If `options` is a string, then it specifies the encoding.
* @since v0.1.31
*/
export function createReadStream(path: PathLike, options?: BufferEncoding | ReadStreamOptions): ReadStream;
/**
* `options` may also include a `start` option to allow writing data at some
* position past the beginning of the file, allowed values are in the
* \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. Modifying a file rather than
* replacing it may require the `flags` option to be set to `r+` rather than the
* default `w`. The `encoding` can be any one of those accepted by `Buffer`.
*
* If `autoClose` is set to true (default behavior) on `'error'` or `'finish'`the file descriptor will be closed automatically. If `autoClose` is false,
* then the file descriptor won't be closed, even if there's an error.
* It is the application's responsibility to close it and make sure there's no
* file descriptor leak.
*
* By default, the stream will emit a `'close'` event after it has been
* destroyed. Set the `emitClose` option to `false` to change this behavior.
*
* By providing the `fs` option it is possible to override the corresponding `fs`implementations for `open`, `write`, `writev`, and `close`. Overriding `write()`without `writev()` can reduce
* performance as some optimizations (`_writev()`)
* will be disabled. When providing the `fs` option, overrides for at least one of`write` and `writev` are required. If no `fd` option is supplied, an override
* for `open` is also required. If `autoClose` is `true`, an override for `close`is also required.
*
* Like `fs.ReadStream`, if `fd` is specified, `fs.WriteStream` will ignore the`path` argument and will use the specified file descriptor. This means that no`'open'` event will be
* emitted. `fd` should be blocking; non-blocking `fd`s
* should be passed to `net.Socket`.
*
* If `options` is a string, then it specifies the encoding.
* @since v0.1.31
*/
export function createWriteStream(path: PathLike, options?: BufferEncoding | WriteStreamOptions): WriteStream;
/**
* Forces all currently queued I/O operations associated with the file to the
* operating system's synchronized I/O completion state. Refer to the POSIX [`fdatasync(2)`](http://man7.org/linux/man-pages/man2/fdatasync.2.html) documentation for details. No arguments other
* than a possible
* exception are given to the completion callback.
* @since v0.1.96
*/
export function fdatasync(fd: number, callback |
: NoParamCallback): void;
export namespace fdatasync {
/**
* Asynchronous fdatasync(2) - synchronize a file's in-core state with storage device.
* @param fd A file descriptor.
*/
function __promisify__(fd: number): Promise<void>;
}
/**
* Forces all currently queued I/O operations associated with the file to the
* operating system's synchronized I/O completion state. Refer to the POSIX [`fdatasync(2)`](http://man7.org/linux/man-pages/man2/fdatasync.2.html) documentation for details. Returns `undefined`.
* @since v0.1.96
*/
export function fdatasyncSync(fd: number): void;
/**
* Asynchronously copies `src` to `dest`. By default, `dest` is overwritten if it
* already exists. No arguments other than a possible exception are given to the
* callback function. Node.js makes no guarantees about the atomicity of the copy
* operation. If an error occurs after the destination file has been opened for
* writing, Node.js will attempt to remove the destination.
*
* `mode` is an optional integer that specifies the behavior
* of the copy operation. It is possible to create a mask consisting of the bitwise
* OR of two or more values (e.g.`fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE`).
*
* * `fs.constants.COPYFILE_EXCL`: The copy operation will fail if `dest` already
* exists.
* * `fs.constants.COPYFILE_FICLONE`: The copy operation will attempt to create a
* copy-on-write reflink. If the platform does not support copy-on-write, then a
* fallback copy mechanism is used.
* * `fs.constants.COPYFILE_FICLONE_FORCE`: The copy operation will attempt to
* create a copy-on-write reflink. If the platform does not support
* copy-on-write, then the operation will fail.
*
* ```js
* import { copyFile, constants } from 'node:fs';
*
* function callback(err) {
* if (err) throw err;
* console.log('source.txt was copied to destination.txt');
* }
*
* // destination.txt will be created or overwritten by default.
* copyFile('source.txt', 'destination.txt', callback);
*
* // By using COPYFILE_EXCL, the operation will fail if destination.txt exists.
* copyFile('source.txt', 'destination.txt', constants.COPYFILE_EXCL, callback);
* ```
* @since v8.5.0
* @param src source filename to copy
* @param dest destination filename of the copy operation
* @param [mode=0] modifiers for copy operation.
*/
export function copyFile(src: PathLike, dest: PathLike, callback: NoParamCallback): void;
export function copyFile(src: PathLike, dest: PathLike, mode: number, callback: NoParamCallback): void;
export namespace copyFile {
function __promisify__(src: PathLike, dst: PathLike, mode?: number): Promise<void>;
}
/**
* Synchronously copies `src` to `dest`. By default, `dest` is overwritten if it
* already exists. Returns `undefined`. Node.js makes no guarantees about the
* atomicity of the copy operation. If an error occurs after the destination file
* has been opened for writing, Node.js will attempt to remove the destination.
*
* `mode` is an optional integer that specifies the behavior
* of the copy operation. It is possible to create a mask consisting of the bitwise
* OR of two or more values (e.g.`fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE`).
*
* * `fs.constants.COPYFILE_EXCL`: The copy operation will fail if `dest` already
* exists.
* * `fs.constants.COPYFILE_FICLONE`: The copy operation will attempt to create a
* copy-on-write reflink. If the platform does not support copy-on-write, then a
* fallback copy mechanism is used.
* * `fs.constants.COPYFILE_FICLONE_FORCE`: The copy operation will attempt to
* create a copy-on-write reflink. If the platform does not support
* |
copy-on-write, then the operation will fail.
*
* ```js
* import { copyFileSync, constants } from 'node:fs';
*
* // destination.txt will be created or overwritten by default.
* copyFileSync('source.txt', 'destination.txt');
* console.log('source.txt was copied to destination.txt');
*
* // By using COPYFILE_EXCL, the operation will fail if destination.txt exists.
* copyFileSync('source.txt', 'destination.txt', constants.COPYFILE_EXCL);
* ```
* @since v8.5.0
* @param src source filename to copy
* @param dest destination filename of the copy operation
* @param [mode=0] modifiers for copy operation.
*/
export function copyFileSync(src: PathLike, dest: PathLike, mode?: number): void;
/**
* Write an array of `ArrayBufferView`s to the file specified by `fd` using`writev()`.
*
* `position` is the offset from the beginning of the file where this data
* should be written. If `typeof position !== 'number'`, the data will be written
* at the current position.
*
* The callback will be given three arguments: `err`, `bytesWritten`, and`buffers`. `bytesWritten` is how many bytes were written from `buffers`.
*
* If this method is `util.promisify()` ed, it returns a promise for an`Object` with `bytesWritten` and `buffers` properties.
*
* It is unsafe to use `fs.writev()` multiple times on the same file without
* waiting for the callback. For this scenario, use {@link createWriteStream}.
*
* On Linux, positional writes don't work when the file is opened in append mode.
* The kernel ignores the position argument and always appends the data to
* the end of the file.
* @since v12.9.0
* @param [position='null']
*/
export function writev(
fd: number,
buffers: readonly NodeJS.ArrayBufferView[],
cb: (err: NodeJS.ErrnoException | null, bytesWritten: number, buffers: NodeJS.ArrayBufferView[]) => void,
): void;
export function writev(
fd: number,
buffers: readonly NodeJS.ArrayBufferView[],
position: number,
cb: (err: NodeJS.ErrnoException | null, bytesWritten: number, buffers: NodeJS.ArrayBufferView[]) => void,
): void;
export interface WriteVResult {
bytesWritten: number;
buffers: NodeJS.ArrayBufferView[];
}
export namespace writev {
function __promisify__(
fd: number,
buffers: readonly NodeJS.ArrayBufferView[],
position?: number,
): Promise<WriteVResult>;
}
/**
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link writev}.
* @since v12.9.0
* @param [position='null']
* @return The number of bytes written.
*/
export function writevSync(fd: number, buffers: readonly NodeJS.ArrayBufferView[], position?: number): number;
/**
* Read from a file specified by `fd` and write to an array of `ArrayBufferView`s
* using `readv()`.
*
* `position` is the offset from the beginning of the file from where data
* should be read. If `typeof position !== 'number'`, the data will be read
* from the current position.
*
* The callback will be given three arguments: `err`, `bytesRead`, and`buffers`. `bytesRead` is how many bytes were read from the file.
*
* If this method is invoked as its `util.promisify()` ed version, it returns
* a promise for an `Object` with `bytesRead` and `buffers` properties.
* @since v13.13.0, v12.17.0
* @param [position='null']
*/
export function readv(
fd: number,
buffers: readonly NodeJS.ArrayBufferView[],
cb: (err: NodeJS.ErrnoException | null, bytesRead: number, buffers: NodeJS.ArrayBufferView[]) => void,
): void;
export function readv(
fd: number,
buffers: readonly NodeJS.ArrayBufferView[],
position: |
number,
cb: (err: NodeJS.ErrnoException | null, bytesRead: number, buffers: NodeJS.ArrayBufferView[]) => void,
): void;
export interface ReadVResult {
bytesRead: number;
buffers: NodeJS.ArrayBufferView[];
}
export namespace readv {
function __promisify__(
fd: number,
buffers: readonly NodeJS.ArrayBufferView[],
position?: number,
): Promise<ReadVResult>;
}
/**
* For detailed information, see the documentation of the asynchronous version of
* this API: {@link readv}.
* @since v13.13.0, v12.17.0
* @param [position='null']
* @return The number of bytes read.
*/
export function readvSync(fd: number, buffers: readonly NodeJS.ArrayBufferView[], position?: number): number;
export interface OpenAsBlobOptions {
/**
* An optional mime type for the blob.
*
* @default 'undefined'
*/
type?: string | undefined;
}
/**
* Returns a `Blob` whose data is backed by the given file.
*
* The file must not be modified after the `Blob` is created. Any modifications
* will cause reading the `Blob` data to fail with a `DOMException` error.
* Synchronous stat operations on the file when the `Blob` is created, and before
* each read in order to detect whether the file data has been modified on disk.
*
* ```js
* import { openAsBlob } from 'node:fs';
*
* const blob = await openAsBlob('the.file.txt');
* const ab = await blob.arrayBuffer();
* blob.stream();
* ```
* @since v19.8.0
* @experimental
*/
export function openAsBlob(path: PathLike, options?: OpenAsBlobOptions): Promise<Blob>;
export interface OpenDirOptions {
/**
* @default 'utf8'
*/
encoding?: BufferEncoding | undefined;
/**
* Number of directory entries that are buffered
* internally when reading from the directory. Higher values lead to better
* performance but higher memory usage.
* @default 32
*/
bufferSize?: number | undefined;
/**
* @default false
*/
recursive?: boolean;
}
/**
* Synchronously open a directory. See [`opendir(3)`](http://man7.org/linux/man-pages/man3/opendir.3.html).
*
* Creates an `fs.Dir`, which contains all further functions for reading from
* and cleaning up the directory.
*
* The `encoding` option sets the encoding for the `path` while opening the
* directory and subsequent read operations.
* @since v12.12.0
*/
export function opendirSync(path: PathLike, options?: OpenDirOptions): Dir;
/**
* Asynchronously open a directory. See the POSIX [`opendir(3)`](http://man7.org/linux/man-pages/man3/opendir.3.html) documentation for
* more details.
*
* Creates an `fs.Dir`, which contains all further functions for reading from
* and cleaning up the directory.
*
* The `encoding` option sets the encoding for the `path` while opening the
* directory and subsequent read operations.
* @since v12.12.0
*/
export function opendir(path: PathLike, cb: (err: NodeJS.ErrnoException | null, dir: Dir) => void): void;
export function opendir(
path: PathLike,
options: OpenDirOptions,
cb: (err: NodeJS.ErrnoException | null, dir: Dir) => void,
): void;
export namespace opendir {
function __promisify__(path: PathLike, options?: OpenDirOptions): Promise<Dir>;
}
export interface BigIntStats extends StatsBase<bigint> {
atimeNs: bigint;
mtimeNs: bigint;
ctimeNs: bigint;
birthtimeNs: bigint;
}
export interface BigIntOptions {
bigint: true;
}
export interface StatOptions {
bigint?: boolean | undefined;
}
export interface StatSyncOptions extends StatOptions {
|
throwIfNoEntry?: boolean | undefined;
}
interface CopyOptionsBase {
/**
* Dereference symlinks
* @default false
*/
dereference?: boolean;
/**
* When `force` is `false`, and the destination
* exists, throw an error.
* @default false
*/
errorOnExist?: boolean;
/**
* Overwrite existing file or directory. _The copy
* operation will ignore errors if you set this to false and the destination
* exists. Use the `errorOnExist` option to change this behavior.
* @default true
*/
force?: boolean;
/**
* Modifiers for copy operation. See `mode` flag of {@link copyFileSync()}
*/
mode?: number;
/**
* When `true` timestamps from `src` will
* be preserved.
* @default false
*/
preserveTimestamps?: boolean;
/**
* Copy directories recursively.
* @default false
*/
recursive?: boolean;
/**
* When true, path resolution for symlinks will be skipped
* @default false
*/
verbatimSymlinks?: boolean;
}
export interface CopyOptions extends CopyOptionsBase {
/**
* Function to filter copied files/directories. Return
* `true` to copy the item, `false` to ignore it.
*/
filter?(source: string, destination: string): boolean | Promise<boolean>;
}
export interface CopySyncOptions extends CopyOptionsBase {
/**
* Function to filter copied files/directories. Return
* `true` to copy the item, `false` to ignore it.
*/
filter?(source: string, destination: string): boolean;
}
/**
* Asynchronously copies the entire directory structure from `src` to `dest`,
* including subdirectories and files.
*
* When copying a directory to another directory, globs are not supported and
* behavior is similar to `cp dir1/ dir2/`.
* @since v16.7.0
* @experimental
* @param src source path to copy.
* @param dest destination path to copy to.
*/
export function cp(
source: string | URL,
destination: string | URL,
callback: (err: NodeJS.ErrnoException | null) => void,
): void;
export function cp(
source: string | URL,
destination: string | URL,
opts: CopyOptions,
callback: (err: NodeJS.ErrnoException | null) => void,
): void;
/**
* Synchronously copies the entire directory structure from `src` to `dest`,
* including subdirectories and files.
*
* When copying a directory to another directory, globs are not supported and
* behavior is similar to `cp dir1/ dir2/`.
* @since v16.7.0
* @experimental
* @param src source path to copy.
* @param dest destination path to copy to.
*/
export function cpSync(source: string | URL, destination: string | URL, opts?: CopySyncOptions): void;
}
declare module "node:fs" {
export * from "fs";
}
|
/**
* The `node:child_process` module provides the ability to spawn subprocesses in
* a manner that is similar, but not identical, to [`popen(3)`](http://man7.org/linux/man-pages/man3/popen.3.html). This capability
* is primarily provided by the {@link spawn} function:
*
* ```js
* const { spawn } = require('node:child_process');
* const ls = spawn('ls', ['-lh', '/usr']);
*
* ls.stdout.on('data', (data) => {
* console.log(`stdout: ${data}`);
* });
*
* ls.stderr.on('data', (data) => {
* console.error(`stderr: ${data}`);
* });
*
* ls.on('close', (code) => {
* console.log(`child process exited with code ${code}`);
* });
* ```
*
* By default, pipes for `stdin`, `stdout`, and `stderr` are established between
* the parent Node.js process and the spawned subprocess. These pipes have
* limited (and platform-specific) capacity. If the subprocess writes to
* stdout in excess of that limit without the output being captured, the
* subprocess blocks waiting for the pipe buffer to accept more data. This is
* identical to the behavior of pipes in the shell. Use the `{ stdio: 'ignore' }`option if the output will not be consumed.
*
* The command lookup is performed using the `options.env.PATH` environment
* variable if `env` is in the `options` object. Otherwise, `process.env.PATH` is
* used. If `options.env` is set without `PATH`, lookup on Unix is performed
* on a default search path search of `/usr/bin:/bin` (see your operating system's
* manual for execvpe/execvp), on Windows the current processes environment
* variable `PATH` is used.
*
* On Windows, environment variables are case-insensitive. Node.js
* lexicographically sorts the `env` keys and uses the first one that
* case-insensitively matches. Only first (in lexicographic order) entry will be
* passed to the subprocess. This might lead to issues on Windows when passing
* objects to the `env` option that have multiple variants of the same key, such as`PATH` and `Path`.
*
* The {@link spawn} method spawns the child process asynchronously,
* without blocking the Node.js event loop. The {@link spawnSync} function provides equivalent functionality in a synchronous manner that blocks
* the event loop until the spawned process either exits or is terminated.
*
* For convenience, the `node:child_process` module provides a handful of
* synchronous and asynchronous alternatives to {@link spawn} and {@link spawnSync}. Each of these alternatives are implemented on
* top of {@link spawn} or {@link spawnSync}.
*
* * {@link exec}: spawns a shell and runs a command within that
* shell, passing the `stdout` and `stderr` to a callback function when
* complete.
* * {@link execFile}: similar to {@link exec} except
* that it spawns the command directly without first spawning a shell by
* default.
* * {@link fork}: spawns a new Node.js process and invokes a
* specified module with an IPC communication channel established that allows
* sending messages between parent and child.
* * {@link execSync}: a synchronous version of {@link exec} that will block the Node.js event loop.
* * {@link execFileSync}: a synchronous version of {@link execFile} that will block the Node.js event loop.
*
* For certain use cases, such as automating shell scripts, the `synchronous counterparts` may be more convenient. In many cases, however,
* the synchronous methods can have significant impact on performance due to
* stalling the event loop while spawned processes complete.
* @see [source](https://github.com/nodejs/node/blob/v20.2.0/lib/child_process.js)
*/
declare module "child_process" {
import { ObjectEncodingOptions } from "node:fs";
import { Abortable, EventEmitter } from "node:events";
import * as net from "node:net";
import { Pipe, Readable, Stream, Writable } from "node:stream";
import { URL } from "node:url";
type Serializable = string | object | number | boolean | bigint;
type SendHandle = net.Socket | net.Server;
/** |
* Instances of the `ChildProcess` represent spawned child processes.
*
* Instances of `ChildProcess` are not intended to be created directly. Rather,
* use the {@link spawn}, {@link exec},{@link execFile}, or {@link fork} methods to create
* instances of `ChildProcess`.
* @since v2.2.0
*/
class ChildProcess extends EventEmitter {
/**
* A `Writable Stream` that represents the child process's `stdin`.
*
* If a child process waits to read all of its input, the child will not continue
* until this stream has been closed via `end()`.
*
* If the child was spawned with `stdio[0]` set to anything other than `'pipe'`,
* then this will be `null`.
*
* `subprocess.stdin` is an alias for `subprocess.stdio[0]`. Both properties will
* refer to the same value.
*
* The `subprocess.stdin` property can be `null` or `undefined`if the child process could not be successfully spawned.
* @since v0.1.90
*/
stdin: Writable | null;
/**
* A `Readable Stream` that represents the child process's `stdout`.
*
* If the child was spawned with `stdio[1]` set to anything other than `'pipe'`,
* then this will be `null`.
*
* `subprocess.stdout` is an alias for `subprocess.stdio[1]`. Both properties will
* refer to the same value.
*
* ```js
* const { spawn } = require('node:child_process');
*
* const subprocess = spawn('ls');
*
* subprocess.stdout.on('data', (data) => {
* console.log(`Received chunk ${data}`);
* });
* ```
*
* The `subprocess.stdout` property can be `null` or `undefined`if the child process could not be successfully spawned.
* @since v0.1.90
*/
stdout: Readable | null;
/**
* A `Readable Stream` that represents the child process's `stderr`.
*
* If the child was spawned with `stdio[2]` set to anything other than `'pipe'`,
* then this will be `null`.
*
* `subprocess.stderr` is an alias for `subprocess.stdio[2]`. Both properties will
* refer to the same value.
*
* The `subprocess.stderr` property can be `null` or `undefined`if the child process could not be successfully spawned.
* @since v0.1.90
*/
stderr: Readable | null;
/**
* The `subprocess.channel` property is a reference to the child's IPC channel. If
* no IPC channel exists, this property is `undefined`.
* @since v7.1.0
*/
readonly channel?: Pipe | null | undefined;
/**
* A sparse array of pipes to the child process, corresponding with positions in
* the `stdio` option passed to {@link spawn} that have been set
* to the value `'pipe'`. `subprocess.stdio[0]`, `subprocess.stdio[1]`, and`subprocess.stdio[2]` are also available as `subprocess.stdin`,`subprocess.stdout`, and `subprocess.stderr`,
* respectively.
*
* In the following example, only the child's fd `1` (stdout) is configured as a
* pipe, so only the parent's `subprocess.stdio[1]` is a stream, all other values
* in the array are `null`.
*
* ```js
* const assert = require('node:assert');
* const fs = require('node:fs');
* const child_process = require('node:child_process');
*
* const subprocess = child_process.spawn('ls', {
* stdio: [
* 0, // Use parent's stdin for child.
* 'pipe', // Pipe child's stdout to parent.
* fs.openSync('err.out', 'w'), // Direct child's stderr to a file.
* ],
* });
*
* assert.strictEqual(subprocess.stdio[0], null);
* assert.strictEqua |
l(subprocess.stdio[0], subprocess.stdin);
*
* assert(subprocess.stdout);
* assert.strictEqual(subprocess.stdio[1], subprocess.stdout);
*
* assert.strictEqual(subprocess.stdio[2], null);
* assert.strictEqual(subprocess.stdio[2], subprocess.stderr);
* ```
*
* The `subprocess.stdio` property can be `undefined` if the child process could
* not be successfully spawned.
* @since v0.7.10
*/
readonly stdio: [
Writable | null,
// stdin
Readable | null,
// stdout
Readable | null,
// stderr
Readable | Writable | null | undefined,
// extra
Readable | Writable | null | undefined, // extra
];
/**
* The `subprocess.killed` property indicates whether the child process
* successfully received a signal from `subprocess.kill()`. The `killed` property
* does not indicate that the child process has been terminated.
* @since v0.5.10
*/
readonly killed: boolean;
/**
* Returns the process identifier (PID) of the child process. If the child process
* fails to spawn due to errors, then the value is `undefined` and `error` is
* emitted.
*
* ```js
* const { spawn } = require('node:child_process');
* const grep = spawn('grep', ['ssh']);
*
* console.log(`Spawned child pid: ${grep.pid}`);
* grep.stdin.end();
* ```
* @since v0.1.90
*/
readonly pid?: number | undefined;
/**
* The `subprocess.connected` property indicates whether it is still possible to
* send and receive messages from a child process. When `subprocess.connected` is`false`, it is no longer possible to send or receive messages.
* @since v0.7.2
*/
readonly connected: boolean;
/**
* The `subprocess.exitCode` property indicates the exit code of the child process.
* If the child process is still running, the field will be `null`.
*/
readonly exitCode: number | null;
/**
* The `subprocess.signalCode` property indicates the signal received by
* the child process if any, else `null`.
*/
readonly signalCode: NodeJS.Signals | null;
/**
* The `subprocess.spawnargs` property represents the full list of command-line
* arguments the child process was launched with.
*/
readonly spawnargs: string[];
/**
* The `subprocess.spawnfile` property indicates the executable file name of
* the child process that is launched.
*
* For {@link fork}, its value will be equal to `process.execPath`.
* For {@link spawn}, its value will be the name of
* the executable file.
* For {@link exec}, its value will be the name of the shell
* in which the child process is launched.
*/
readonly spawnfile: string;
/**
* The `subprocess.kill()` method sends a signal to the child process. If no
* argument is given, the process will be sent the `'SIGTERM'` signal. See [`signal(7)`](http://man7.org/linux/man-pages/man7/signal.7.html) for a list of available signals. This function
* returns `true` if [`kill(2)`](http://man7.org/linux/man-pages/man2/kill.2.html) succeeds, and `false` otherwise.
*
* ```js
* const { spawn } = require('node:child_process');
* const grep = spawn('grep', ['ssh']);
*
* grep.on('close', (code, signal) => {
* console.log(
* `child process terminated due to receipt of signal ${signal}`);
* });
*
* // Send SIGHUP to process.
* grep.kill('SIGHUP');
* ```
*
|
* The `ChildProcess` object may emit an `'error'` event if the signal
* cannot be delivered. Sending a signal to a child process that has already exited
* is not an error but may have unforeseen consequences. Specifically, if the
* process identifier (PID) has been reassigned to another process, the signal will
* be delivered to that process instead which can have unexpected results.
*
* While the function is called `kill`, the signal delivered to the child process
* may not actually terminate the process.
*
* See [`kill(2)`](http://man7.org/linux/man-pages/man2/kill.2.html) for reference.
*
* On Windows, where POSIX signals do not exist, the `signal` argument will be
* ignored, and the process will be killed forcefully and abruptly (similar to`'SIGKILL'`).
* See `Signal Events` for more details.
*
* On Linux, child processes of child processes will not be terminated
* when attempting to kill their parent. This is likely to happen when running a
* new process in a shell or with the use of the `shell` option of `ChildProcess`:
*
* ```js
* 'use strict';
* const { spawn } = require('node:child_process');
*
* const subprocess = spawn(
* 'sh',
* [
* '-c',
* `node -e "setInterval(() => {
* console.log(process.pid, 'is alive')
* }, 500);"`,
* ], {
* stdio: ['inherit', 'inherit', 'inherit'],
* },
* );
*
* setTimeout(() => {
* subprocess.kill(); // Does not terminate the Node.js process in the shell.
* }, 2000);
* ```
* @since v0.1.90
*/
kill(signal?: NodeJS.Signals | number): boolean;
/**
* Calls {@link ChildProcess.kill} with `'SIGTERM'`.
* @since v20.5.0
*/
[Symbol.dispose](): void;
/**
* When an IPC channel has been established between the parent and child (
* i.e. when using {@link fork}), the `subprocess.send()` method can
* be used to send messages to the child process. When the child process is a
* Node.js instance, these messages can be received via the `'message'` event.
*
* The message goes through serialization and parsing. The resulting
* message might not be the same as what is originally sent.
*
* For example, in the parent script:
*
* ```js
* const cp = require('node:child_process');
* const n = cp.fork(`${__dirname}/sub.js`);
*
* n.on('message', (m) => {
* console.log('PARENT got message:', m);
* });
*
* // Causes the child to print: CHILD got message: { hello: 'world' }
* n.send({ hello: 'world' });
* ```
*
* And then the child script, `'sub.js'` might look like this:
*
* ```js
* process.on('message', (m) => {
* console.log('CHILD got message:', m);
* });
*
* // Causes the parent to print: PARENT got message: { foo: 'bar', baz: null }
* process.send({ foo: 'bar', baz: NaN });
* ```
*
* Child Node.js processes will have a `process.send()` method of their own
* that allows the child to send messages back to the parent.
*
* There is a special case when sending a `{cmd: 'NODE_foo'}` message. Messages
* containing a `NODE_` prefix in the `cmd` property are reserved for use within
* Node.js core and will not be emitted in the child's `'message'` event. Rather, such messages are emitted using the`'internalMessage'` event and are consumed internally by Node.js.
* Applications should avoid using such messages or listening for`' |
internalMessage'` events as it is subject to change without notice.
*
* The optional `sendHandle` argument that may be passed to `subprocess.send()` is
* for passing a TCP server or socket object to the child process. The child will
* receive the object as the second argument passed to the callback function
* registered on the `'message'` event. Any data that is received
* and buffered in the socket will not be sent to the child.
*
* The optional `callback` is a function that is invoked after the message is
* sent but before the child may have received it. The function is called with a
* single argument: `null` on success, or an `Error` object on failure.
*
* If no `callback` function is provided and the message cannot be sent, an`'error'` event will be emitted by the `ChildProcess` object. This can
* happen, for instance, when the child process has already exited.
*
* `subprocess.send()` will return `false` if the channel has closed or when the
* backlog of unsent messages exceeds a threshold that makes it unwise to send
* more. Otherwise, the method returns `true`. The `callback` function can be
* used to implement flow control.
*
* #### Example: sending a server object
*
* The `sendHandle` argument can be used, for instance, to pass the handle of
* a TCP server object to the child process as illustrated in the example below:
*
* ```js
* const subprocess = require('node:child_process').fork('subprocess.js');
*
* // Open up the server object and send the handle.
* const server = require('node:net').createServer();
* server.on('connection', (socket) => {
* socket.end('handled by parent');
* });
* server.listen(1337, () => {
* subprocess.send('server', server);
* });
* ```
*
* The child would then receive the server object as:
*
* ```js
* process.on('message', (m, server) => {
* if (m === 'server') {
* server.on('connection', (socket) => {
* socket.end('handled by child');
* });
* }
* });
* ```
*
* Once the server is now shared between the parent and child, some connections
* can be handled by the parent and some by the child.
*
* While the example above uses a server created using the `node:net` module,`node:dgram` module servers use exactly the same workflow with the exceptions of
* listening on a `'message'` event instead of `'connection'` and using`server.bind()` instead of `server.listen()`. This is, however, only
* supported on Unix platforms.
*
* #### Example: sending a socket object
*
* Similarly, the `sendHandler` argument can be used to pass the handle of a
* socket to the child process. The example below spawns two children that each
* handle connections with "normal" or "special" priority:
*
* ```js
* const { fork } = require('node:child_process');
* const normal = fork('subprocess.js', ['normal']);
* const special = fork('subprocess.js', ['special']);
*
* // Open up the server and send sockets to child. Use pauseOnConnect to prevent
* // the sockets from being read before they are sent to the child process.
* const server = require('node:net').createServer({ pauseOnConnect: true });
* server.on('connection', (socket) => {
*
* // If this is special priority...
* if (socket.remoteAddress === '74.125.127.100') {
* special.send('socket', socket);
* return;
* }
* // This is normal priority.
|
* normal.send('socket', socket);
* });
* server.listen(1337);
* ```
*
* The `subprocess.js` would receive the socket handle as the second argument
* passed to the event callback function:
*
* ```js
* process.on('message', (m, socket) => {
* if (m === 'socket') {
* if (socket) {
* // Check that the client socket exists.
* // It is possible for the socket to be closed between the time it is
* // sent and the time it is received in the child process.
* socket.end(`Request handled with ${process.argv[2]} priority`);
* }
* }
* });
* ```
*
* Do not use `.maxConnections` on a socket that has been passed to a subprocess.
* The parent cannot track when the socket is destroyed.
*
* Any `'message'` handlers in the subprocess should verify that `socket` exists,
* as the connection may have been closed during the time it takes to send the
* connection to the child.
* @since v0.5.9
* @param options The `options` argument, if present, is an object used to parameterize the sending of certain types of handles. `options` supports the following properties:
*/
send(message: Serializable, callback?: (error: Error | null) => void): boolean;
send(message: Serializable, sendHandle?: SendHandle, callback?: (error: Error | null) => void): boolean;
send(
message: Serializable,
sendHandle?: SendHandle,
options?: MessageOptions,
callback?: (error: Error | null) => void,
): boolean;
/**
* Closes the IPC channel between parent and child, allowing the child to exit
* gracefully once there are no other connections keeping it alive. After calling
* this method the `subprocess.connected` and `process.connected` properties in
* both the parent and child (respectively) will be set to `false`, and it will be
* no longer possible to pass messages between the processes.
*
* The `'disconnect'` event will be emitted when there are no messages in the
* process of being received. This will most often be triggered immediately after
* calling `subprocess.disconnect()`.
*
* When the child process is a Node.js instance (e.g. spawned using {@link fork}), the `process.disconnect()` method can be invoked
* within the child process to close the IPC channel as well.
* @since v0.7.2
*/
disconnect(): void;
/**
* By default, the parent will wait for the detached child to exit. To prevent the
* parent from waiting for a given `subprocess` to exit, use the`subprocess.unref()` method. Doing so will cause the parent's event loop to not
* include the child in its reference count, allowing the parent to exit
* independently of the child, unless there is an established IPC channel between
* the child and the parent.
*
* ```js
* const { spawn } = require('node:child_process');
*
* const subprocess = spawn(process.argv[0], ['child_program.js'], {
* detached: true,
* stdio: 'ignore',
* });
*
* subprocess.unref();
* ```
* @since v0.7.10
*/
unref(): void;
/**
* Calling `subprocess.ref()` after making a call to `subprocess.unref()` will
* restore the removed reference count for the child process, forcing the parent
* to wait for the child to exit before exiting itself.
*
* ```js
* const { spawn } = require('node:child_process');
*
* const subprocess = spawn(process.argv[0], ['child_program.js'], {
* detached: |
true,
* stdio: 'ignore',
* });
*
* subprocess.unref();
* subprocess.ref();
* ```
* @since v0.7.10
*/
ref(): void;
/**
* events.EventEmitter
* 1. close
* 2. disconnect
* 3. error
* 4. exit
* 5. message
* 6. spawn
*/
addListener(event: string, listener: (...args: any[]) => void): this;
addListener(event: "close", listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
addListener(event: "disconnect", listener: () => void): this;
addListener(event: "error", listener: (err: Error) => void): this;
addListener(event: "exit", listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
addListener(event: "message", listener: (message: Serializable, sendHandle: SendHandle) => void): this;
addListener(event: "spawn", listener: () => void): this;
emit(event: string | symbol, ...args: any[]): boolean;
emit(event: "close", code: number | null, signal: NodeJS.Signals | null): boolean;
emit(event: "disconnect"): boolean;
emit(event: "error", err: Error): boolean;
emit(event: "exit", code: number | null, signal: NodeJS.Signals | null): boolean;
emit(event: "message", message: Serializable, sendHandle: SendHandle): boolean;
emit(event: "spawn", listener: () => void): boolean;
on(event: string, listener: (...args: any[]) => void): this;
on(event: "close", listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
on(event: "disconnect", listener: () => void): this;
on(event: "error", listener: (err: Error) => void): this;
on(event: "exit", listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
on(event: "message", listener: (message: Serializable, sendHandle: SendHandle) => void): this;
on(event: "spawn", listener: () => void): this;
once(event: string, listener: (...args: any[]) => void): this;
once(event: "close", listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
once(event: "disconnect", listener: () => void): this;
once(event: "error", listener: (err: Error) => void): this;
once(event: "exit", listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
once(event: "message", listener: (message: Serializable, sendHandle: SendHandle) => void): this;
once(event: "spawn", listener: () => void): this;
prependListener(event: string, listener: (...args: any[]) => void): this;
prependListener(event: "close", listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
prependListener(event: "disconnect", listener: () => void): this;
prependListener(event: "error", listener: (err: Error) => void): this;
prependListener(event: "exit", listener: (code: number | null, signal: NodeJS.Signals | null) => void): this;
prependListener(event: "message", listener: (message: Serializable, sendHandle: SendHandle) => void): this;
prependListener(event: "spawn", listener: () => void): this;
prependOnceListener(event: string, listener: (...args: any[]) => void): this;
prependOnceListener(
event: "close",
listener: (code: number | null, signal: NodeJS.Signals | null) => void,
): this;
prependOnceListener(event: "disconnect", listener: () => void): this;
prependOnceListener(event: "error", listener: (err: Error) => void): this;
prependOnceListener(
event: "exit",
listener: (code: number | null, signal: NodeJS.Signals | null) => void,
): this;
prependOnceListener(event: "message", listener: (message: Serializable, sendHandle: SendHandle) => void): this;
prependOnceLi |
stener(event: "spawn", listener: () => void): this;
}
// return this object when stdio option is undefined or not specified
interface ChildProcessWithoutNullStreams extends ChildProcess {
stdin: Writable;
stdout: Readable;
stderr: Readable;
readonly stdio: [
Writable,
Readable,
Readable,
// stderr
Readable | Writable | null | undefined,
// extra, no modification
Readable | Writable | null | undefined, // extra, no modification
];
}
// return this object when stdio option is a tuple of 3
interface ChildProcessByStdio<I extends null | Writable, O extends null | Readable, E extends null | Readable>
extends ChildProcess
{
stdin: I;
stdout: O;
stderr: E;
readonly stdio: [
I,
O,
E,
Readable | Writable | null | undefined,
// extra, no modification
Readable | Writable | null | undefined, // extra, no modification
];
}
interface MessageOptions {
keepOpen?: boolean | undefined;
}
type IOType = "overlapped" | "pipe" | "ignore" | "inherit";
type StdioOptions = IOType | Array<IOType | "ipc" | Stream | number | null | undefined>;
type SerializationType = "json" | "advanced";
interface MessagingOptions extends Abortable {
/**
* Specify the kind of serialization used for sending messages between processes.
* @default 'json'
*/
serialization?: SerializationType | undefined;
/**
* The signal value to be used when the spawned process will be killed by the abort signal.
* @default 'SIGTERM'
*/
killSignal?: NodeJS.Signals | number | undefined;
/**
* In milliseconds the maximum amount of time the process is allowed to run.
*/
timeout?: number | undefined;
}
interface ProcessEnvOptions {
uid?: number | undefined;
gid?: number | undefined;
cwd?: string | URL | undefined;
env?: NodeJS.ProcessEnv | undefined;
}
interface CommonOptions extends ProcessEnvOptions {
/**
* @default false
*/
windowsHide?: boolean | undefined;
/**
* @default 0
*/
timeout?: number | undefined;
}
interface CommonSpawnOptions extends CommonOptions, MessagingOptions, Abortable {
argv0?: string | undefined;
/**
* Can be set to 'pipe', 'inherit', 'overlapped', or 'ignore', or an array of these strings.
* If passed as an array, the first element is used for `stdin`, the second for
* `stdout`, and the third for `stderr`. A fourth element can be used to
* specify the `stdio` behavior beyond the standard streams. See
* {@link ChildProcess.stdio} for more information.
*
* @default 'pipe'
*/
stdio?: StdioOptions | undefined;
shell?: boolean | string | undefined;
windowsVerbatimArguments?: boolean | undefined;
}
interface SpawnOptions extends CommonSpawnOptions {
detached?: boolean | undefined;
}
interface SpawnOptionsWithoutStdio extends SpawnOptions {
stdio?: StdioPipeNamed | StdioPipe[] | undefined;
}
type StdioNull = "inherit" | "ignore" | Stream;
type StdioPipeNamed = "pipe" | "overlapped";
type StdioPipe = undefined | null | StdioPipeNamed;
interface SpawnOptionsWithStdioTuple<
Stdin extends StdioNull | StdioPipe,
Stdout extends StdioNull | StdioPipe,
Stderr extends StdioNull | StdioPipe,
> extends SpawnOptions {
stdio: [Stdin, Stdout, Stderr];
}
/**
* The `child_process.spawn()` method spawns a new process using the given`command`, with command-line arguments in `args`. If omitted, `args` defaults
* to an empty array.
*
|
* **If the `shell` option is enabled, do not pass unsanitized user input to this**
* **function. Any input containing shell metacharacters may be used to trigger**
* **arbitrary command execution.**
*
* A third argument may be used to specify additional options, with these defaults:
*
* ```js
* const defaults = {
* cwd: undefined,
* env: process.env,
* };
* ```
*
* Use `cwd` to specify the working directory from which the process is spawned.
* If not given, the default is to inherit the current working directory. If given,
* but the path does not exist, the child process emits an `ENOENT` error
* and exits immediately. `ENOENT` is also emitted when the command
* does not exist.
*
* Use `env` to specify environment variables that will be visible to the new
* process, the default is `process.env`.
*
* `undefined` values in `env` will be ignored.
*
* Example of running `ls -lh /usr`, capturing `stdout`, `stderr`, and the
* exit code:
*
* ```js
* const { spawn } = require('node:child_process');
* const ls = spawn('ls', ['-lh', '/usr']);
*
* ls.stdout.on('data', (data) => {
* console.log(`stdout: ${data}`);
* });
*
* ls.stderr.on('data', (data) => {
* console.error(`stderr: ${data}`);
* });
*
* ls.on('close', (code) => {
* console.log(`child process exited with code ${code}`);
* });
* ```
*
* Example: A very elaborate way to run `ps ax | grep ssh`
*
* ```js
* const { spawn } = require('node:child_process');
* const ps = spawn('ps', ['ax']);
* const grep = spawn('grep', ['ssh']);
*
* ps.stdout.on('data', (data) => {
* grep.stdin.write(data);
* });
*
* ps.stderr.on('data', (data) => {
* console.error(`ps stderr: ${data}`);
* });
*
* ps.on('close', (code) => {
* if (code !== 0) {
* console.log(`ps process exited with code ${code}`);
* }
* grep.stdin.end();
* });
*
* grep.stdout.on('data', (data) => {
* console.log(data.toString());
* });
*
* grep.stderr.on('data', (data) => {
* console.error(`grep stderr: ${data}`);
* });
*
* grep.on('close', (code) => {
* if (code !== 0) {
* console.log(`grep process exited with code ${code}`);
* }
* });
* ```
*
* Example of checking for failed `spawn`:
*
* ```js
* const { spawn } = require('node:child_process');
* const subprocess = spawn('bad_command');
*
* subprocess.on('error', (err) => {
* console.error('Failed to start subprocess.');
* });
* ```
*
* Certain platforms (macOS, Linux) will use the value of `argv[0]` for the process
* title while others (Windows, SunOS) will use `command`.
*
* Node.js overwrites `argv[0]` with `process.execPath` on startup, so`process.argv[0]` in a Node.js child process will not match the `argv0`parameter passed to `spawn` from the parent. Retrieve
* it with the`process.argv0` property instead.
*
* If the `signal` option is enabled, calling `.abort()` on the corresponding`AbortController` is similar to calling `.kill()` on the child process except
* the error passed to the callback will be an `AbortError`:
*
* ```js
* const { spawn } = require('node:child_process');
* const controller = new AbortController();
* const { signal } = controller;
* const grep = spawn('grep', ['ssh'], { signal });
* grep.on('error', (err) => {
* // This will be called with err being an AbortError if the controller aborts
* });
* controller.abort(); // Stops the child process
* ```
* @since v0.1.90
* @param command The command to run.
* @param args List of string arguments.
*/
funct |
ion spawn(command: string, options?: SpawnOptionsWithoutStdio): ChildProcessWithoutNullStreams;
function spawn(
command: string,
options: SpawnOptionsWithStdioTuple<StdioPipe, StdioPipe, StdioPipe>,
): ChildProcessByStdio<Writable, Readable, Readable>;
function spawn(
command: string,
options: SpawnOptionsWithStdioTuple<StdioPipe, StdioPipe, StdioNull>,
): ChildProcessByStdio<Writable, Readable, null>;
function spawn(
command: string,
options: SpawnOptionsWithStdioTuple<StdioPipe, StdioNull, StdioPipe>,
): ChildProcessByStdio<Writable, null, Readable>;
function spawn(
command: string,
options: SpawnOptionsWithStdioTuple<StdioNull, StdioPipe, StdioPipe>,
): ChildProcessByStdio<null, Readable, Readable>;
function spawn(
command: string,
options: SpawnOptionsWithStdioTuple<StdioPipe, StdioNull, StdioNull>,
): ChildProcessByStdio<Writable, null, null>;
function spawn(
command: string,
options: SpawnOptionsWithStdioTuple<StdioNull, StdioPipe, StdioNull>,
): ChildProcessByStdio<null, Readable, null>;
function spawn(
command: string,
options: SpawnOptionsWithStdioTuple<StdioNull, StdioNull, StdioPipe>,
): ChildProcessByStdio<null, null, Readable>;
function spawn(
command: string,
options: SpawnOptionsWithStdioTuple<StdioNull, StdioNull, StdioNull>,
): ChildProcessByStdio<null, null, null>;
function spawn(command: string, options: SpawnOptions): ChildProcess;
// overloads of spawn with 'args'
function spawn(
command: string,
args?: readonly string[],
options?: SpawnOptionsWithoutStdio,
): ChildProcessWithoutNullStreams;
function spawn(
command: string,
args: readonly string[],
options: SpawnOptionsWithStdioTuple<StdioPipe, StdioPipe, StdioPipe>,
): ChildProcessByStdio<Writable, Readable, Readable>;
function spawn(
command: string,
args: readonly string[],
options: SpawnOptionsWithStdioTuple<StdioPipe, StdioPipe, StdioNull>,
): ChildProcessByStdio<Writable, Readable, null>;
function spawn(
command: string,
args: readonly string[],
options: SpawnOptionsWithStdioTuple<StdioPipe, StdioNull, StdioPipe>,
): ChildProcessByStdio<Writable, null, Readable>;
function spawn(
command: string,
args: readonly string[],
options: SpawnOptionsWithStdioTuple<StdioNull, StdioPipe, StdioPipe>,
): ChildProcessByStdio<null, Readable, Readable>;
function spawn(
command: string,
args: readonly string[],
options: SpawnOptionsWithStdioTuple<StdioPipe, StdioNull, StdioNull>,
): ChildProcessByStdio<Writable, null, null>;
function spawn(
command: string,
args: readonly string[],
options: SpawnOptionsWithStdioTuple<StdioNull, StdioPipe, StdioNull>,
): ChildProcessByStdio<null, Readable, null>;
function spawn(
command: string,
args: readonly string[],
options: SpawnOptionsWithStdioTuple<StdioNull, StdioNull, StdioPipe>,
): ChildProcessByStdio<null, null, Readable>;
function spawn(
command: string,
args: readonly string[],
options: SpawnOptionsWithStdioTuple<StdioNull, StdioNull, StdioNull>,
): ChildProcessByStdio<null, null, null>;
function spawn(command: string, args: readonly string[], options: SpawnOptions): ChildProcess;
interface ExecOptions extends CommonOptions {
shell?: string | undefined;
signal?: AbortSignal | undefined;
maxBuffer?: number | undefined;
killSignal?: NodeJS.Signals | number | undefined;
}
interface ExecOptionsWithStringEncoding extends ExecOptions {
encoding: BufferEncoding;
}
interface ExecOptionsWithBufferEncoding extends ExecOptions {
encoding: BufferEncoding | null; // specify `null`.
|
}
interface ExecException extends Error {
cmd?: string | undefined;
killed?: boolean | undefined;
code?: number | undefined;
signal?: NodeJS.Signals | undefined;
}
/**
* Spawns a shell then executes the `command` within that shell, buffering any
* generated output. The `command` string passed to the exec function is processed
* directly by the shell and special characters (vary based on [shell](https://en.wikipedia.org/wiki/List_of_command-line_interpreters))
* need to be dealt with accordingly:
*
* ```js
* const { exec } = require('node:child_process');
*
* exec('"/path/to/test file/test.sh" arg1 arg2');
* // Double quotes are used so that the space in the path is not interpreted as
* // a delimiter of multiple arguments.
*
* exec('echo "The \\$HOME variable is $HOME"');
* // The $HOME variable is escaped in the first instance, but not in the second.
* ```
*
* **Never pass unsanitized user input to this function. Any input containing shell**
* **metacharacters may be used to trigger arbitrary command execution.**
*
* If a `callback` function is provided, it is called with the arguments`(error, stdout, stderr)`. On success, `error` will be `null`. On error,`error` will be an instance of `Error`. The
* `error.code` property will be
* the exit code of the process. By convention, any exit code other than `0`indicates an error. `error.signal` will be the signal that terminated the
* process.
*
* The `stdout` and `stderr` arguments passed to the callback will contain the
* stdout and stderr output of the child process. By default, Node.js will decode
* the output as UTF-8 and pass strings to the callback. The `encoding` option
* can be used to specify the character encoding used to decode the stdout and
* stderr output. If `encoding` is `'buffer'`, or an unrecognized character
* encoding, `Buffer` objects will be passed to the callback instead.
*
* ```js
* const { exec } = require('node:child_process');
* exec('cat *.js missing_file | wc -l', (error, stdout, stderr) => {
* if (error) {
* console.error(`exec error: ${error}`);
* return;
* }
* console.log(`stdout: ${stdout}`);
* console.error(`stderr: ${stderr}`);
* });
* ```
*
* If `timeout` is greater than `0`, the parent will send the signal
* identified by the `killSignal` property (the default is `'SIGTERM'`) if the
* child runs longer than `timeout` milliseconds.
*
* Unlike the [`exec(3)`](http://man7.org/linux/man-pages/man3/exec.3.html) POSIX system call, `child_process.exec()` does not replace
* the existing process and uses a shell to execute the command.
*
* If this method is invoked as its `util.promisify()` ed version, it returns
* a `Promise` for an `Object` with `stdout` and `stderr` properties. The returned`ChildProcess` instance is attached to the `Promise` as a `child` property. In
* case of an error (including any error resulting in an exit code other than 0), a
* rejected promise is returned, with the same `error` object given in the
* callback, but with two additional properties `stdout` and `stderr`.
*
* ```js
* const util = require('node:util');
* const exec = util.promisify(require('node:child_process').exec);
*
* async function lsExample() {
* const { stdout, stderr } = await exec('ls');
* console.log('stdout:', stdout);
* console.error('stderr:', stderr);
* }
* lsExample();
* ```
*
* If the `signal` option is enabled, calling `.abort()` on the corresponding`AbortController` is similar to calling `.kill()` on the child process except
* the error passed to the callback will be an `AbortError`:
*
* ```js
* const { exec } = require('node: |
child_process');
* const controller = new AbortController();
* const { signal } = controller;
* const child = exec('grep ssh', { signal }, (error) => {
* console.error(error); // an AbortError
* });
* controller.abort();
* ```
* @since v0.1.90
* @param command The command to run, with space-separated arguments.
* @param callback called with the output when process terminates.
*/
function exec(
command: string,
callback?: (error: ExecException | null, stdout: string, stderr: string) => void,
): ChildProcess;
// `options` with `"buffer"` or `null` for `encoding` means stdout/stderr are definitely `Buffer`.
function exec(
command: string,
options: {
encoding: "buffer" | null;
} & ExecOptions,
callback?: (error: ExecException | null, stdout: Buffer, stderr: Buffer) => void,
): ChildProcess;
// `options` with well known `encoding` means stdout/stderr are definitely `string`.
function exec(
command: string,
options: {
encoding: BufferEncoding;
} & ExecOptions,
callback?: (error: ExecException | null, stdout: string, stderr: string) => void,
): ChildProcess;
// `options` with an `encoding` whose type is `string` means stdout/stderr could either be `Buffer` or `string`.
// There is no guarantee the `encoding` is unknown as `string` is a superset of `BufferEncoding`.
function exec(
command: string,
options: {
encoding: BufferEncoding;
} & ExecOptions,
callback?: (error: ExecException | null, stdout: string | Buffer, stderr: string | Buffer) => void,
): ChildProcess;
// `options` without an `encoding` means stdout/stderr are definitely `string`.
function exec(
command: string,
options: ExecOptions,
callback?: (error: ExecException | null, stdout: string, stderr: string) => void,
): ChildProcess;
// fallback if nothing else matches. Worst case is always `string | Buffer`.
function exec(
command: string,
options: (ObjectEncodingOptions & ExecOptions) | undefined | null,
callback?: (error: ExecException | null, stdout: string | Buffer, stderr: string | Buffer) => void,
): ChildProcess;
interface PromiseWithChild<T> extends Promise<T> {
child: ChildProcess;
}
namespace exec {
function __promisify__(command: string): PromiseWithChild<{
stdout: string;
stderr: string;
}>;
function __promisify__(
command: string,
options: {
encoding: "buffer" | null;
} & ExecOptions,
): PromiseWithChild<{
stdout: Buffer;
stderr: Buffer;
}>;
function __promisify__(
command: string,
options: {
encoding: BufferEncoding;
} & ExecOptions,
): PromiseWithChild<{
stdout: string;
stderr: string;
}>;
function __promisify__(
command: string,
options: ExecOptions,
): PromiseWithChild<{
stdout: string;
stderr: string;
}>;
function __promisify__(
command: string,
options?: (ObjectEncodingOptions & ExecOptions) | null,
): PromiseWithChild<{
stdout: string | Buffer;
stderr: string | Buffer;
}>;
}
interface ExecFileOptions extends CommonOptions, Abortable {
maxBuffer?: number | undefined;
killSignal?: NodeJS.Signals | number | undefined;
windowsVerbatimArguments?: boolean | undefined;
shell?: boolean | string | undefined;
signal?: AbortSignal | undefined;
}
interface ExecFileOptionsWithStringEncoding extends ExecFileOptions {
encoding: BufferEncoding;
}
interface ExecFileOptionsWithBufferEnc |
oding extends ExecFileOptions {
encoding: "buffer" | null;
}
interface ExecFileOptionsWithOtherEncoding extends ExecFileOptions {
encoding: BufferEncoding;
}
type ExecFileException =
& Omit<ExecException, "code">
& Omit<NodeJS.ErrnoException, "code">
& { code?: string | number | undefined | null };
/**
* The `child_process.execFile()` function is similar to {@link exec} except that it does not spawn a shell by default. Rather, the specified
* executable `file` is spawned directly as a new process making it slightly more
* efficient than {@link exec}.
*
* The same options as {@link exec} are supported. Since a shell is
* not spawned, behaviors such as I/O redirection and file globbing are not
* supported.
*
* ```js
* const { execFile } = require('node:child_process');
* const child = execFile('node', ['--version'], (error, stdout, stderr) => {
* if (error) {
* throw error;
* }
* console.log(stdout);
* });
* ```
*
* The `stdout` and `stderr` arguments passed to the callback will contain the
* stdout and stderr output of the child process. By default, Node.js will decode
* the output as UTF-8 and pass strings to the callback. The `encoding` option
* can be used to specify the character encoding used to decode the stdout and
* stderr output. If `encoding` is `'buffer'`, or an unrecognized character
* encoding, `Buffer` objects will be passed to the callback instead.
*
* If this method is invoked as its `util.promisify()` ed version, it returns
* a `Promise` for an `Object` with `stdout` and `stderr` properties. The returned`ChildProcess` instance is attached to the `Promise` as a `child` property. In
* case of an error (including any error resulting in an exit code other than 0), a
* rejected promise is returned, with the same `error` object given in the
* callback, but with two additional properties `stdout` and `stderr`.
*
* ```js
* const util = require('node:util');
* const execFile = util.promisify(require('node:child_process').execFile);
* async function getVersion() {
* const { stdout } = await execFile('node', ['--version']);
* console.log(stdout);
* }
* getVersion();
* ```
*
* **If the `shell` option is enabled, do not pass unsanitized user input to this**
* **function. Any input containing shell metacharacters may be used to trigger**
* **arbitrary command execution.**
*
* If the `signal` option is enabled, calling `.abort()` on the corresponding`AbortController` is similar to calling `.kill()` on the child process except
* the error passed to the callback will be an `AbortError`:
*
* ```js
* const { execFile } = require('node:child_process');
* const controller = new AbortController();
* const { signal } = controller;
* const child = execFile('node', ['--version'], { signal }, (error) => {
* console.error(error); // an AbortError
* });
* controller.abort();
* ```
* @since v0.1.91
* @param file The name or path of the executable file to run.
* @param args List of string arguments.
* @param callback Called with the output when process terminates.
*/
function execFile(file: string): ChildProcess;
function execFile(
file: string,
options: (ObjectEncodingOptions & ExecFileOptions) | undefined | null,
): ChildProcess;
function execFile(file: string, args?: readonly string[] | null): ChildProcess;
function execFile(
file: string,
args: readonly string[] | undefined | null,
options: (ObjectEncodingOptions & ExecFileOptions) | undefined | null,
): ChildProcess;
// no `options` definitely means stdout/stderr are `string`.
function execFile(
file: string,
callback: ( |
error: ExecFileException | null, stdout: string, stderr: string) => void,
): ChildProcess;
function execFile(
file: string,
args: readonly string[] | undefined | null,
callback: (error: ExecFileException | null, stdout: string, stderr: string) => void,
): ChildProcess;
// `options` with `"buffer"` or `null` for `encoding` means stdout/stderr are definitely `Buffer`.
function execFile(
file: string,
options: ExecFileOptionsWithBufferEncoding,
callback: (error: ExecFileException | null, stdout: Buffer, stderr: Buffer) => void,
): ChildProcess;
function execFile(
file: string,
args: readonly string[] | undefined | null,
options: ExecFileOptionsWithBufferEncoding,
callback: (error: ExecFileException | null, stdout: Buffer, stderr: Buffer) => void,
): ChildProcess;
// `options` with well known `encoding` means stdout/stderr are definitely `string`.
function execFile(
file: string,
options: ExecFileOptionsWithStringEncoding,
callback: (error: ExecFileException | null, stdout: string, stderr: string) => void,
): ChildProcess;
function execFile(
file: string,
args: readonly string[] | undefined | null,
options: ExecFileOptionsWithStringEncoding,
callback: (error: ExecFileException | null, stdout: string, stderr: string) => void,
): ChildProcess;
// `options` with an `encoding` whose type is `string` means stdout/stderr could either be `Buffer` or `string`.
// There is no guarantee the `encoding` is unknown as `string` is a superset of `BufferEncoding`.
function execFile(
file: string,
options: ExecFileOptionsWithOtherEncoding,
callback: (error: ExecFileException | null, stdout: string | Buffer, stderr: string | Buffer) => void,
): ChildProcess;
function execFile(
file: string,
args: readonly string[] | undefined | null,
options: ExecFileOptionsWithOtherEncoding,
callback: (error: ExecFileException | null, stdout: string | Buffer, stderr: string | Buffer) => void,
): ChildProcess;
// `options` without an `encoding` means stdout/stderr are definitely `string`.
function execFile(
file: string,
options: ExecFileOptions,
callback: (error: ExecFileException | null, stdout: string, stderr: string) => void,
): ChildProcess;
function execFile(
file: string,
args: readonly string[] | undefined | null,
options: ExecFileOptions,
callback: (error: ExecFileException | null, stdout: string, stderr: string) => void,
): ChildProcess;
// fallback if nothing else matches. Worst case is always `string | Buffer`.
function execFile(
file: string,
options: (ObjectEncodingOptions & ExecFileOptions) | undefined | null,
callback:
| ((error: ExecFileException | null, stdout: string | Buffer, stderr: string | Buffer) => void)
| undefined
| null,
): ChildProcess;
function execFile(
file: string,
args: readonly string[] | undefined | null,
options: (ObjectEncodingOptions & ExecFileOptions) | undefined | null,
callback:
| ((error: ExecFileException | null, stdout: string | Buffer, stderr: string | Buffer) => void)
| undefined
| null,
): ChildProcess;
namespace execFile {
function __promisify__(file: string): PromiseWithChild<{
stdout: string;
stderr: string;
}>;
function __promisify__(
file: string,
args: readonly string[] | undefined | null,
): PromiseWithChild<{
stdout: string;
stderr: string;
}>;
function __promisify__(
file: string,
options: ExecFileOptionsWithBufferEncoding,
): PromiseWithChild<{
stdout: Buffer;
|
stderr: Buffer;
}>;
function __promisify__(
file: string,
args: readonly string[] | undefined | null,
options: ExecFileOptionsWithBufferEncoding,
): PromiseWithChild<{
stdout: Buffer;
stderr: Buffer;
}>;
function __promisify__(
file: string,
options: ExecFileOptionsWithStringEncoding,
): PromiseWithChild<{
stdout: string;
stderr: string;
}>;
function __promisify__(
file: string,
args: readonly string[] | undefined | null,
options: ExecFileOptionsWithStringEncoding,
): PromiseWithChild<{
stdout: string;
stderr: string;
}>;
function __promisify__(
file: string,
options: ExecFileOptionsWithOtherEncoding,
): PromiseWithChild<{
stdout: string | Buffer;
stderr: string | Buffer;
}>;
function __promisify__(
file: string,
args: readonly string[] | undefined | null,
options: ExecFileOptionsWithOtherEncoding,
): PromiseWithChild<{
stdout: string | Buffer;
stderr: string | Buffer;
}>;
function __promisify__(
file: string,
options: ExecFileOptions,
): PromiseWithChild<{
stdout: string;
stderr: string;
}>;
function __promisify__(
file: string,
args: readonly string[] | undefined | null,
options: ExecFileOptions,
): PromiseWithChild<{
stdout: string;
stderr: string;
}>;
function __promisify__(
file: string,
options: (ObjectEncodingOptions & ExecFileOptions) | undefined | null,
): PromiseWithChild<{
stdout: string | Buffer;
stderr: string | Buffer;
}>;
function __promisify__(
file: string,
args: readonly string[] | undefined | null,
options: (ObjectEncodingOptions & ExecFileOptions) | undefined | null,
): PromiseWithChild<{
stdout: string | Buffer;
stderr: string | Buffer;
}>;
}
interface ForkOptions extends ProcessEnvOptions, MessagingOptions, Abortable {
execPath?: string | undefined;
execArgv?: string[] | undefined;
silent?: boolean | undefined;
/**
* Can be set to 'pipe', 'inherit', 'overlapped', or 'ignore', or an array of these strings.
* If passed as an array, the first element is used for `stdin`, the second for
* `stdout`, and the third for `stderr`. A fourth element can be used to
* specify the `stdio` behavior beyond the standard streams. See
* {@link ChildProcess.stdio} for more information.
*
* @default 'pipe'
*/
stdio?: StdioOptions | undefined;
detached?: boolean | undefined;
windowsVerbatimArguments?: boolean | undefined;
}
/**
* The `child_process.fork()` method is a special case of {@link spawn} used specifically to spawn new Node.js processes.
* Like {@link spawn}, a `ChildProcess` object is returned. The
* returned `ChildProcess` will have an additional communication channel
* built-in that allows messages to be passed back and forth between the parent and
* child. See `subprocess.send()` for details.
*
* Keep in mind that spawned Node.js child processes are
* independent of the parent with exception of the IPC communication channel
* that is established between the two. Each process has its own memory, with
* their own V8 instances. Because of the additional resource allocations
* required, spawning a large number of child Node.js processes is not
* recommended.
*
* By default, `child_process.fork( |
)` will spawn new Node.js instances using the `process.execPath` of the parent process. The `execPath` property in the`options` object allows for an alternative
* execution path to be used.
*
* Node.js processes launched with a custom `execPath` will communicate with the
* parent process using the file descriptor (fd) identified using the
* environment variable `NODE_CHANNEL_FD` on the child process.
*
* Unlike the [`fork(2)`](http://man7.org/linux/man-pages/man2/fork.2.html) POSIX system call, `child_process.fork()` does not clone the
* current process.
*
* The `shell` option available in {@link spawn} is not supported by`child_process.fork()` and will be ignored if set.
*
* If the `signal` option is enabled, calling `.abort()` on the corresponding`AbortController` is similar to calling `.kill()` on the child process except
* the error passed to the callback will be an `AbortError`:
*
* ```js
* if (process.argv[2] === 'child') {
* setTimeout(() => {
* console.log(`Hello from ${process.argv[2]}!`);
* }, 1_000);
* } else {
* const { fork } = require('node:child_process');
* const controller = new AbortController();
* const { signal } = controller;
* const child = fork(__filename, ['child'], { signal });
* child.on('error', (err) => {
* // This will be called with err being an AbortError if the controller aborts
* });
* controller.abort(); // Stops the child process
* }
* ```
* @since v0.5.0
* @param modulePath The module to run in the child.
* @param args List of string arguments.
*/
function fork(modulePath: string, options?: ForkOptions): ChildProcess;
function fork(modulePath: string, args?: readonly string[], options?: ForkOptions): ChildProcess;
interface SpawnSyncOptions extends CommonSpawnOptions {
input?: string | NodeJS.ArrayBufferView | undefined;
maxBuffer?: number | undefined;
encoding?: BufferEncoding | "buffer" | null | undefined;
}
interface SpawnSyncOptionsWithStringEncoding extends SpawnSyncOptions {
encoding: BufferEncoding;
}
interface SpawnSyncOptionsWithBufferEncoding extends SpawnSyncOptions {
encoding?: "buffer" | null | undefined;
}
interface SpawnSyncReturns<T> {
pid: number;
output: Array<T | null>;
stdout: T;
stderr: T;
status: number | null;
signal: NodeJS.Signals | null;
error?: Error | undefined;
}
/**
* The `child_process.spawnSync()` method is generally identical to {@link spawn} with the exception that the function will not return
* until the child process has fully closed. When a timeout has been encountered
* and `killSignal` is sent, the method won't return until the process has
* completely exited. If the process intercepts and handles the `SIGTERM` signal
* and doesn't exit, the parent process will wait until the child process has
* exited.
*
* **If the `shell` option is enabled, do not pass unsanitized user input to this**
* **function. Any input containing shell metacharacters may be used to trigger**
* **arbitrary command execution.**
* @since v0.11.12
* @param command The command to run.
* @param args List of string arguments.
*/
function spawnSync(command: string): SpawnSyncReturns<Buffer>;
function spawnSync(command: string, options: SpawnSyncOptionsWithStringEncoding): SpawnSyncReturns<string>;
function spawnSync(command: string, options: SpawnSyncOptionsWithBufferEncoding): SpawnSyncReturns<Buffer>;
function spawnSync(command: string, options?: SpawnSyncOptions): SpawnSyncReturns<string | Buffer>;
function spawnSync(command: string, args: readonly string[]): SpawnSyncReturns<Buffer>;
function spawnSync(
command: string,
args: readonly string[],
|
options: SpawnSyncOptionsWithStringEncoding,
): SpawnSyncReturns<string>;
function spawnSync(
command: string,
args: readonly string[],
options: SpawnSyncOptionsWithBufferEncoding,
): SpawnSyncReturns<Buffer>;
function spawnSync(
command: string,
args?: readonly string[],
options?: SpawnSyncOptions,
): SpawnSyncReturns<string | Buffer>;
interface CommonExecOptions extends CommonOptions {
input?: string | NodeJS.ArrayBufferView | undefined;
/**
* Can be set to 'pipe', 'inherit, or 'ignore', or an array of these strings.
* If passed as an array, the first element is used for `stdin`, the second for
* `stdout`, and the third for `stderr`. A fourth element can be used to
* specify the `stdio` behavior beyond the standard streams. See
* {@link ChildProcess.stdio} for more information.
*
* @default 'pipe'
*/
stdio?: StdioOptions | undefined;
killSignal?: NodeJS.Signals | number | undefined;
maxBuffer?: number | undefined;
encoding?: BufferEncoding | "buffer" | null | undefined;
}
interface ExecSyncOptions extends CommonExecOptions {
shell?: string | undefined;
}
interface ExecSyncOptionsWithStringEncoding extends ExecSyncOptions {
encoding: BufferEncoding;
}
interface ExecSyncOptionsWithBufferEncoding extends ExecSyncOptions {
encoding?: "buffer" | null | undefined;
}
/**
* The `child_process.execSync()` method is generally identical to {@link exec} with the exception that the method will not return
* until the child process has fully closed. When a timeout has been encountered
* and `killSignal` is sent, the method won't return until the process has
* completely exited. If the child process intercepts and handles the `SIGTERM`signal and doesn't exit, the parent process will wait until the child process
* has exited.
*
* If the process times out or has a non-zero exit code, this method will throw.
* The `Error` object will contain the entire result from {@link spawnSync}.
*
* **Never pass unsanitized user input to this function. Any input containing shell**
* **metacharacters may be used to trigger arbitrary command execution.**
* @since v0.11.12
* @param command The command to run.
* @return The stdout from the command.
*/
function execSync(command: string): Buffer;
function execSync(command: string, options: ExecSyncOptionsWithStringEncoding): string;
function execSync(command: string, options: ExecSyncOptionsWithBufferEncoding): Buffer;
function execSync(command: string, options?: ExecSyncOptions): string | Buffer;
interface ExecFileSyncOptions extends CommonExecOptions {
shell?: boolean | string | undefined;
}
interface ExecFileSyncOptionsWithStringEncoding extends ExecFileSyncOptions {
encoding: BufferEncoding;
}
interface ExecFileSyncOptionsWithBufferEncoding extends ExecFileSyncOptions {
encoding?: "buffer" | null; // specify `null`.
}
/**
* The `child_process.execFileSync()` method is generally identical to {@link execFile} with the exception that the method will not
* return until the child process has fully closed. When a timeout has been
* encountered and `killSignal` is sent, the method won't return until the process
* has completely exited.
*
* If the child process intercepts and handles the `SIGTERM` signal and
* does not exit, the parent process will still wait until the child process has
* exited.
*
* If the process times out or has a non-zero exit code, this method will throw an `Error` that will include the full result of the underlying {@link spawnSync}.
*
* **If the `shell` option is enabled, do not pass unsanitized user input to this**
* **function. Any inp |
ut containing shell metacharacters may be used to trigger**
* **arbitrary command execution.**
* @since v0.11.12
* @param file The name or path of the executable file to run.
* @param args List of string arguments.
* @return The stdout from the command.
*/
function execFileSync(file: string): Buffer;
function execFileSync(file: string, options: ExecFileSyncOptionsWithStringEncoding): string;
function execFileSync(file: string, options: ExecFileSyncOptionsWithBufferEncoding): Buffer;
function execFileSync(file: string, options?: ExecFileSyncOptions): string | Buffer;
function execFileSync(file: string, args: readonly string[]): Buffer;
function execFileSync(
file: string,
args: readonly string[],
options: ExecFileSyncOptionsWithStringEncoding,
): string;
function execFileSync(
file: string,
args: readonly string[],
options: ExecFileSyncOptionsWithBufferEncoding,
): Buffer;
function execFileSync(file: string, args?: readonly string[], options?: ExecFileSyncOptions): string | Buffer;
}
declare module "node:child_process" {
export * from "child_process";
}
|
/**
* @since v0.3.7
* @experimental
*/
declare module "module" {
import { URL } from "node:url";
import { MessagePort } from "node:worker_threads";
namespace Module {
/**
* The `module.syncBuiltinESMExports()` method updates all the live bindings for
* builtin `ES Modules` to match the properties of the `CommonJS` exports. It
* does not add or remove exported names from the `ES Modules`.
*
* ```js
* const fs = require('node:fs');
* const assert = require('node:assert');
* const { syncBuiltinESMExports } = require('node:module');
*
* fs.readFile = newAPI;
*
* delete fs.readFileSync;
*
* function newAPI() {
* // ...
* }
*
* fs.newAPI = newAPI;
*
* syncBuiltinESMExports();
*
* import('node:fs').then((esmFS) => {
* // It syncs the existing readFile property with the new value
* assert.strictEqual(esmFS.readFile, newAPI);
* // readFileSync has been deleted from the required fs
* assert.strictEqual('readFileSync' in fs, false);
* // syncBuiltinESMExports() does not remove readFileSync from esmFS
* assert.strictEqual('readFileSync' in esmFS, true);
* // syncBuiltinESMExports() does not add names
* assert.strictEqual(esmFS.newAPI, undefined);
* });
* ```
* @since v12.12.0
*/
function syncBuiltinESMExports(): void;
/**
* `path` is the resolved path for the file for which a corresponding source map
* should be fetched.
* @since v13.7.0, v12.17.0
* @return Returns `module.SourceMap` if a source map is found, `undefined` otherwise.
*/
function findSourceMap(path: string, error?: Error): SourceMap;
interface SourceMapPayload {
file: string;
version: number;
sources: string[];
sourcesContent: string[];
names: string[];
mappings: string;
sourceRoot: string;
}
interface SourceMapping {
generatedLine: number;
generatedColumn: number;
originalSource: string;
originalLine: number;
originalColumn: number;
}
interface SourceOrigin {
/**
* The name of the range in the source map, if one was provided
*/
name?: string;
/**
* The file name of the original source, as reported in the SourceMap
*/
fileName: string;
/**
* The 1-indexed lineNumber of the corresponding call site in the original source
*/
lineNumber: number;
/**
* The 1-indexed columnNumber of the corresponding call site in the original source
*/
columnNumber: number;
}
/**
* @since v13.7.0, v12.17.0
*/
class SourceMap {
/**
* Getter for the payload used to construct the `SourceMap` instance.
*/
readonly payload: SourceMapPayload;
constructor(payload: SourceMapPayload);
/**
* Given a line offset and column offset in the generated source
* file, returns an object representing the SourceMap range in the
* original file if found, or an empty object if not.
*
* The object returned contains the following keys:
*
* The returned value represents the raw range as it appears in the
* SourceMap, based on zero-indexed offsets, _not_ 1-indexed line and
* column numbers as they appear in Error messages and CallSite
* objects.
*
* To get the correspondin |
g 1-indexed line and column numbers from a
* lineNumber and columnNumber as they are reported by Error stacks
* and CallSite objects, use `sourceMap.findOrigin(lineNumber, columnNumber)`
* @param lineOffset The zero-indexed line number offset in the generated source
* @param columnOffset The zero-indexed column number offset in the generated source
*/
findEntry(lineOffset: number, columnOffset: number): SourceMapping;
/**
* Given a 1-indexed `lineNumber` and `columnNumber` from a call site in the generated source,
* find the corresponding call site location in the original source.
*
* If the `lineNumber` and `columnNumber` provided are not found in any source map,
* then an empty object is returned.
* @param lineNumber The 1-indexed line number of the call site in the generated source
* @param columnNumber The 1-indexed column number of the call site in the generated source
*/
findOrigin(lineNumber: number, columnNumber: number): SourceOrigin | {};
}
/** @deprecated Use `ImportAttributes` instead */
interface ImportAssertions extends ImportAttributes {}
interface ImportAttributes extends NodeJS.Dict<string> {
type?: string | undefined;
}
type ModuleFormat = "builtin" | "commonjs" | "json" | "module" | "wasm";
type ModuleSource = string | ArrayBuffer | NodeJS.TypedArray;
interface GlobalPreloadContext {
port: MessagePort;
}
/**
* @deprecated This hook will be removed in a future version.
* Use `initialize` instead. When a loader has an `initialize` export, `globalPreload` will be ignored.
*
* Sometimes it might be necessary to run some code inside of the same global scope that the application runs in.
* This hook allows the return of a string that is run as a sloppy-mode script on startup.
*
* @param context Information to assist the preload code
* @return Code to run before application startup
*/
type GlobalPreloadHook = (context: GlobalPreloadContext) => string;
/**
* The `initialize` hook provides a way to define a custom function that runs in the hooks thread
* when the hooks module is initialized. Initialization happens when the hooks module is registered via `register`.
*
* This hook can receive data from a `register` invocation, including ports and other transferrable objects.
* The return value of `initialize` can be a `Promise`, in which case it will be awaited before the main application thread execution resumes.
*/
type InitializeHook<Data = any> = (data: Data) => void | Promise<void>;
interface ResolveHookContext {
/**
* Export conditions of the relevant `package.json`
*/
conditions: string[];
/**
* @deprecated Use `importAttributes` instead
*/
importAssertions: ImportAttributes;
/**
* An object whose key-value pairs represent the assertions for the module to import
*/
importAttributes: ImportAttributes;
/**
* The module importing this one, or undefined if this is the Node.js entry point
*/
parentURL: string | undefined;
}
interface ResolveFnOutput {
/**
* A hint to the load hook (it might be ignored)
*/
format?: ModuleFormat | null | undefined;
/**
* @deprecated Use `importAttributes` instead
*/
importAssertions?: ImportAttributes | undefined;
/**
* The import attributes to use when caching the module (optional; |
if excluded the input will be used)
*/
importAttributes?: ImportAttributes | undefined;
/**
* A signal that this hook intends to terminate the chain of `resolve` hooks.
* @default false
*/
shortCircuit?: boolean | undefined;
/**
* The absolute URL to which this input resolves
*/
url: string;
}
/**
* The `resolve` hook chain is responsible for resolving file URL for a given module specifier and parent URL, and optionally its format (such as `'module'`) as a hint to the `load` hook.
* If a format is specified, the load hook is ultimately responsible for providing the final `format` value (and it is free to ignore the hint provided by `resolve`);
* if `resolve` provides a format, a custom `load` hook is required even if only to pass the value to the Node.js default `load` hook.
*
* @param specifier The specified URL path of the module to be resolved
* @param context
* @param nextResolve The subsequent `resolve` hook in the chain, or the Node.js default `resolve` hook after the last user-supplied resolve hook
*/
type ResolveHook = (
specifier: string,
context: ResolveHookContext,
nextResolve: (
specifier: string,
context?: ResolveHookContext,
) => ResolveFnOutput | Promise<ResolveFnOutput>,
) => ResolveFnOutput | Promise<ResolveFnOutput>;
interface LoadHookContext {
/**
* Export conditions of the relevant `package.json`
*/
conditions: string[];
/**
* The format optionally supplied by the `resolve` hook chain
*/
format: ModuleFormat;
/**
* @deprecated Use `importAttributes` instead
*/
importAssertions: ImportAttributes;
/**
* An object whose key-value pairs represent the assertions for the module to import
*/
importAttributes: ImportAttributes;
}
interface LoadFnOutput {
format: ModuleFormat;
/**
* A signal that this hook intends to terminate the chain of `resolve` hooks.
* @default false
*/
shortCircuit?: boolean | undefined;
/**
* The source for Node.js to evaluate
*/
source?: ModuleSource;
}
/**
* The `load` hook provides a way to define a custom method of determining how a URL should be interpreted, retrieved, and parsed.
* It is also in charge of validating the import assertion.
*
* @param url The URL/path of the module to be loaded
* @param context Metadata about the module
* @param nextLoad The subsequent `load` hook in the chain, or the Node.js default `load` hook after the last user-supplied `load` hook
*/
type LoadHook = (
url: string,
context: LoadHookContext,
nextLoad: (url: string, context?: LoadHookContext) => LoadFnOutput | Promise<LoadFnOutput>,
) => LoadFnOutput | Promise<LoadFnOutput>;
}
interface RegisterOptions<Data> {
parentURL: string | URL;
data?: Data | undefined;
transferList?: any[] | undefined;
}
interface Module extends NodeModule {}
class Module {
static runMain(): void;
static wrap(code: string): string;
static createRequire(path: string | URL): NodeRequire;
static builtinModules: string[];
static isBuiltin(moduleName: string): boolean;
static Module: typeof Module;
static register<Data = any>(
specifier: string | URL,
parentURL?: string | URL,
options?: RegisterOptions<Data>,
|
): void;
static register<Data = any>(specifier: string | URL, options?: RegisterOptions<Data>): void;
constructor(id: string, parent?: Module);
}
global {
interface ImportMeta {
/**
* The directory name of the current module. This is the same as the `path.dirname()` of the `import.meta.filename`.
* **Caveat:** only present on `file:` modules.
*/
dirname: string;
/**
* The full absolute path and filename of the current module, with symlinks resolved.
* This is the same as the `url.fileURLToPath()` of the `import.meta.url`.
* **Caveat:** only local modules support this property. Modules not using the `file:` protocol will not provide it.
*/
filename: string;
/**
* The absolute `file:` URL of the module.
*/
url: string;
/**
* Provides a module-relative resolution function scoped to each module, returning
* the URL string.
*
* Second `parent` parameter is only used when the `--experimental-import-meta-resolve`
* command flag enabled.
*
* @since v20.6.0
*
* @param specifier The module specifier to resolve relative to `parent`.
* @param parent The absolute parent module URL to resolve from.
* @returns The absolute (`file:`) URL string for the resolved module.
*/
resolve(specifier: string, parent?: string | URL | undefined): string;
}
}
export = Module;
}
declare module "node:module" {
import module = require("module");
export = module;
}
|
declare module "process" {
import * as tty from "node:tty";
import { Worker } from "node:worker_threads";
global {
var process: NodeJS.Process;
namespace NodeJS {
// this namespace merge is here because these are specifically used
// as the type for process.stdin, process.stdout, and process.stderr.
// they can't live in tty.d.ts because we need to disambiguate the imported name.
interface ReadStream extends tty.ReadStream {}
interface WriteStream extends tty.WriteStream {}
interface MemoryUsageFn {
/**
* The `process.memoryUsage()` method iterate over each page to gather informations about memory
* usage which can be slow depending on the program memory allocations.
*/
(): MemoryUsage;
/**
* method returns an integer representing the Resident Set Size (RSS) in bytes.
*/
rss(): number;
}
interface MemoryUsage {
rss: number;
heapTotal: number;
heapUsed: number;
external: number;
arrayBuffers: number;
}
interface CpuUsage {
user: number;
system: number;
}
interface ProcessRelease {
name: string;
sourceUrl?: string | undefined;
headersUrl?: string | undefined;
libUrl?: string | undefined;
lts?: string | undefined;
}
interface ProcessVersions extends Dict<string> {
http_parser: string;
node: string;
v8: string;
ares: string;
uv: string;
zlib: string;
modules: string;
openssl: string;
}
type Platform =
| "aix"
| "android"
| "darwin"
| "freebsd"
| "haiku"
| "linux"
| "openbsd"
| "sunos"
| "win32"
| "cygwin"
| "netbsd";
type Architecture =
| "arm"
| "arm64"
| "ia32"
| "mips"
| "mipsel"
| "ppc"
| "ppc64"
| "riscv64"
| "s390"
| "s390x"
| "x64";
type Signals =
| "SIGABRT"
| "SIGALRM"
| "SIGBUS"
| "SIGCHLD"
| "SIGCONT"
| "SIGFPE"
| "SIGHUP"
| "SIGILL"
| "SIGINT"
| "SIGIO"
| "SIGIOT"
| "SIGKILL"
| "SIGPIPE"
| "SIGPOLL"
| "SIGPROF"
| "SIGPWR"
| "SIGQUIT"
| "SIGSEGV"
| "SIGSTKFLT"
| "SIGSTOP"
| "SIGSYS"
| "SIGTERM"
| "SIGTRAP"
| "SIGTSTP"
| "SIGTTIN"
| "SIGTTOU"
| "SIGUNUSED"
| "SIGURG"
| "SIGUSR1"
| "SIGUSR2"
| "SIGVTALRM"
| "SIGWINCH"
| "SIGXCPU"
| "SIGXFSZ"
| "SIGBREAK"
| "SIGLOST"
| "SIGINFO";
type UncaughtExceptionOrigin = "uncaughtException" | "unhandledRejection";
type MultipleResolveType = "resolve" | "reject";
type BeforeExitListener = (code: number) => void;
type DisconnectListener = () => void;
type ExitListener = (code: number) => void;
|
type RejectionHandledListener = (promise: Promise<unknown>) => void;
type UncaughtExceptionListener = (error: Error, origin: UncaughtExceptionOrigin) => void;
/**
* Most of the time the unhandledRejection will be an Error, but this should not be relied upon
* as *anything* can be thrown/rejected, it is therefore unsafe to assume that the value is an Error.
*/
type UnhandledRejectionListener = (reason: unknown, promise: Promise<unknown>) => void;
type WarningListener = (warning: Error) => void;
type MessageListener = (message: unknown, sendHandle: unknown) => void;
type SignalsListener = (signal: Signals) => void;
type MultipleResolveListener = (
type: MultipleResolveType,
promise: Promise<unknown>,
value: unknown,
) => void;
type WorkerListener = (worker: Worker) => void;
interface Socket extends ReadWriteStream {
isTTY?: true | undefined;
}
// Alias for compatibility
interface ProcessEnv extends Dict<string> {
/**
* Can be used to change the default timezone at runtime
*/
TZ?: string;
}
interface HRTime {
(time?: [number, number]): [number, number];
bigint(): bigint;
}
interface ProcessReport {
/**
* Directory where the report is written.
* working directory of the Node.js process.
* @default '' indicating that reports are written to the current
*/
directory: string;
/**
* Filename where the report is written.
* The default value is the empty string.
* @default '' the output filename will be comprised of a timestamp,
* PID, and sequence number.
*/
filename: string;
/**
* Returns a JSON-formatted diagnostic report for the running process.
* The report's JavaScript stack trace is taken from err, if present.
*/
getReport(err?: Error): string;
/**
* If true, a diagnostic report is generated on fatal errors,
* such as out of memory errors or failed C++ assertions.
* @default false
*/
reportOnFatalError: boolean;
/**
* If true, a diagnostic report is generated when the process
* receives the signal specified by process.report.signal.
* @default false
*/
reportOnSignal: boolean;
/**
* If true, a diagnostic report is generated on uncaught exception.
* @default false
*/
reportOnUncaughtException: boolean;
/**
* The signal used to trigger the creation of a diagnostic report.
* @default 'SIGUSR2'
*/
signal: Signals;
/**
* Writes a diagnostic report to a file. If filename is not provided, the default filename
* includes the date, time, PID, and a sequence number.
* The report's JavaScript stack trace is taken from err, if present.
*
* @param fileName Name of the file where the report is written.
* This should be a relative path, that will be appended to the directory specified in
* `process.report.directory`, or the current working directory of the Node.js process,
* if unspecified.
* @param error A custom error used |
for reporting the JavaScript stack.
* @return Filename of the generated report.
*/
writeReport(fileName?: string): string;
writeReport(error?: Error): string;
writeReport(fileName?: string, err?: Error): string;
}
interface ResourceUsage {
fsRead: number;
fsWrite: number;
involuntaryContextSwitches: number;
ipcReceived: number;
ipcSent: number;
majorPageFault: number;
maxRSS: number;
minorPageFault: number;
sharedMemorySize: number;
signalsCount: number;
swappedOut: number;
systemCPUTime: number;
unsharedDataSize: number;
unsharedStackSize: number;
userCPUTime: number;
voluntaryContextSwitches: number;
}
interface EmitWarningOptions {
/**
* When `warning` is a `string`, `type` is the name to use for the _type_ of warning being emitted.
*
* @default 'Warning'
*/
type?: string | undefined;
/**
* A unique identifier for the warning instance being emitted.
*/
code?: string | undefined;
/**
* When `warning` is a `string`, `ctor` is an optional function used to limit the generated stack trace.
*
* @default process.emitWarning
*/
ctor?: Function | undefined;
/**
* Additional text to include with the error.
*/
detail?: string | undefined;
}
interface ProcessConfig {
readonly target_defaults: {
readonly cflags: any[];
readonly default_configuration: string;
readonly defines: string[];
readonly include_dirs: string[];
readonly libraries: string[];
};
readonly variables: {
readonly clang: number;
readonly host_arch: string;
readonly node_install_npm: boolean;
readonly node_install_waf: boolean;
readonly node_prefix: string;
readonly node_shared_openssl: boolean;
readonly node_shared_v8: boolean;
readonly node_shared_zlib: boolean;
readonly node_use_dtrace: boolean;
readonly node_use_etw: boolean;
readonly node_use_openssl: boolean;
readonly target_arch: string;
readonly v8_no_strict_aliasing: number;
readonly v8_use_snapshot: boolean;
readonly visibility: string;
};
}
interface Process extends EventEmitter {
/**
* The `process.stdout` property returns a stream connected to`stdout` (fd `1`). It is a `net.Socket` (which is a `Duplex` stream) unless fd `1` refers to a file, in which case it is
* a `Writable` stream.
*
* For example, to copy `process.stdin` to `process.stdout`:
*
* ```js
* import { stdin, stdout } from 'node:process';
*
* stdin.pipe(stdout);
* ```
*
* `process.stdout` differs from other Node.js streams in important ways. See `note on process I/O` for more information.
*/
stdout: WriteStream & {
fd: 1;
};
/**
|
* The `process.stderr` property returns a stream connected to`stderr` (fd `2`). It is a `net.Socket` (which is a `Duplex` stream) unless fd `2` refers to a file, in which case it is
* a `Writable` stream.
*
* `process.stderr` differs from other Node.js streams in important ways. See `note on process I/O` for more information.
*/
stderr: WriteStream & {
fd: 2;
};
/**
* The `process.stdin` property returns a stream connected to`stdin` (fd `0`). It is a `net.Socket` (which is a `Duplex` stream) unless fd `0` refers to a file, in which case it is
* a `Readable` stream.
*
* For details of how to read from `stdin` see `readable.read()`.
*
* As a `Duplex` stream, `process.stdin` can also be used in "old" mode that
* is compatible with scripts written for Node.js prior to v0.10\.
* For more information see `Stream compatibility`.
*
* In "old" streams mode the `stdin` stream is paused by default, so one
* must call `process.stdin.resume()` to read from it. Note also that calling`process.stdin.resume()` itself would switch stream to "old" mode.
*/
stdin: ReadStream & {
fd: 0;
};
openStdin(): Socket;
/**
* The `process.argv` property returns an array containing the command-line
* arguments passed when the Node.js process was launched. The first element will
* be {@link execPath}. See `process.argv0` if access to the original value
* of `argv[0]` is needed. The second element will be the path to the JavaScript
* file being executed. The remaining elements will be any additional command-line
* arguments.
*
* For example, assuming the following script for `process-args.js`:
*
* ```js
* import { argv } from 'node:process';
*
* // print process.argv
* argv.forEach((val, index) => {
* console.log(`${index}: ${val}`);
* });
* ```
*
* Launching the Node.js process as:
*
* ```bash
* node process-args.js one two=three four
* ```
*
* Would generate the output:
*
* ```text
* 0: /usr/local/bin/node
* 1: /Users/mjr/work/node/process-args.js
* 2: one
* 3: two=three
* 4: four
* ```
* @since v0.1.27
*/
argv: string[];
/**
* The `process.argv0` property stores a read-only copy of the original value of`argv[0]` passed when Node.js starts.
*
* ```console
* $ bash -c 'exec -a customArgv0 ./node'
* > process.argv[0]
* '/Volumes/code/external/node/out/Release/node'
* > process.argv0
* 'customArgv0'
* ```
* @since v6.4.0
*/
argv0: string;
/**
* The `process.execArgv` property returns the set of Node.js-specific command-line
* options passed when the Node.js process was launched. These options do not
* appear in the array returned by the {@link argv} property, and do not
* include the Node.js executable, the name of the script, or any options |
following
* the script name. These options are useful in order to spawn child processes with
* the same execution environment as the parent.
*
* ```bash
* node --harmony script.js --version
* ```
*
* Results in `process.execArgv`:
*
* ```js
* ['--harmony']
* ```
*
* And `process.argv`:
*
* ```js
* ['/usr/local/bin/node', 'script.js', '--version']
* ```
*
* Refer to `Worker constructor` for the detailed behavior of worker
* threads with this property.
* @since v0.7.7
*/
execArgv: string[];
/**
* The `process.execPath` property returns the absolute pathname of the executable
* that started the Node.js process. Symbolic links, if any, are resolved.
*
* ```js
* '/usr/local/bin/node'
* ```
* @since v0.1.100
*/
execPath: string;
/**
* The `process.abort()` method causes the Node.js process to exit immediately and
* generate a core file.
*
* This feature is not available in `Worker` threads.
* @since v0.7.0
*/
abort(): never;
/**
* The `process.chdir()` method changes the current working directory of the
* Node.js process or throws an exception if doing so fails (for instance, if
* the specified `directory` does not exist).
*
* ```js
* import { chdir, cwd } from 'node:process';
*
* console.log(`Starting directory: ${cwd()}`);
* try {
* chdir('/tmp');
* console.log(`New directory: ${cwd()}`);
* } catch (err) {
* console.error(`chdir: ${err}`);
* }
* ```
*
* This feature is not available in `Worker` threads.
* @since v0.1.17
*/
chdir(directory: string): void;
/**
* The `process.cwd()` method returns the current working directory of the Node.js
* process.
*
* ```js
* import { cwd } from 'node:process';
*
* console.log(`Current directory: ${cwd()}`);
* ```
* @since v0.1.8
*/
cwd(): string;
/**
* The port used by the Node.js debugger when enabled.
*
* ```js
* import process from 'node:process';
*
* process.debugPort = 5858;
* ```
* @since v0.7.2
*/
debugPort: number;
/**
* The `process.emitWarning()` method can be used to emit custom or application
* specific process warnings. These can be listened for by adding a handler to the `'warning'` event.
*
* ```js
* import { emitWarning } from 'node:process';
*
* // Emit a warning with a code and additional detail.
* emitWarning('Something happened!', {
* code: 'MY_WARNING',
* detail: 'This is some additional information',
* });
* // Emits:
|
* // (node:56338) [MY_WARNING] Warning: Something happened!
* // This is some additional information
* ```
*
* In this example, an `Error` object is generated internally by`process.emitWarning()` and passed through to the `'warning'` handler.
*
* ```js
* import process from 'node:process';
*
* process.on('warning', (warning) => {
* console.warn(warning.name); // 'Warning'
* console.warn(warning.message); // 'Something happened!'
* console.warn(warning.code); // 'MY_WARNING'
* console.warn(warning.stack); // Stack trace
* console.warn(warning.detail); // 'This is some additional information'
* });
* ```
*
* If `warning` is passed as an `Error` object, the `options` argument is ignored.
* @since v8.0.0
* @param warning The warning to emit.
*/
emitWarning(warning: string | Error, ctor?: Function): void;
emitWarning(warning: string | Error, type?: string, ctor?: Function): void;
emitWarning(warning: string | Error, type?: string, code?: string, ctor?: Function): void;
emitWarning(warning: string | Error, options?: EmitWarningOptions): void;
/**
* The `process.env` property returns an object containing the user environment.
* See [`environ(7)`](http://man7.org/linux/man-pages/man7/environ.7.html).
*
* An example of this object looks like:
*
* ```js
* {
* TERM: 'xterm-256color',
* SHELL: '/usr/local/bin/bash',
* USER: 'maciej',
* PATH: '~/.bin/:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin',
* PWD: '/Users/maciej',
* EDITOR: 'vim',
* SHLVL: '1',
* HOME: '/Users/maciej',
* LOGNAME: 'maciej',
* _: '/usr/local/bin/node'
* }
* ```
*
* It is possible to modify this object, but such modifications will not be
* reflected outside the Node.js process, or (unless explicitly requested)
* to other `Worker` threads.
* In other words, the following example would not work:
*
* ```bash
* node -e 'process.env.foo = "bar"' && echo $foo
* ```
*
* While the following will:
*
* ```js
* import { env } from 'node:process';
*
* env.foo = 'bar';
* console.log(env.foo);
* ```
*
* Assigning a property on `process.env` will implicitly convert the value
* to a string. **This behavior is deprecated.** Future versions of Node.js may
* throw an error when the value is not a string, number, or boolean.
*
* ```js
* import { env } from 'node:process';
*
* env.test = null;
* console.log(env.test);
* // => 'null'
* env.test = undefined;
* console.log(env.test);
* // => 'undefined'
* ```
*
* Use `delete` to delete a property from `process.env`.
*
* ```js
* import { env } from 'node:process';
*
* env |
.TEST = 1;
* delete env.TEST;
* console.log(env.TEST);
* // => undefined
* ```
*
* On Windows operating systems, environment variables are case-insensitive.
*
* ```js
* import { env } from 'node:process';
*
* env.TEST = 1;
* console.log(env.test);
* // => 1
* ```
*
* Unless explicitly specified when creating a `Worker` instance,
* each `Worker` thread has its own copy of `process.env`, based on its
* parent thread's `process.env`, or whatever was specified as the `env` option
* to the `Worker` constructor. Changes to `process.env` will not be visible
* across `Worker` threads, and only the main thread can make changes that
* are visible to the operating system or to native add-ons. On Windows, a copy of`process.env` on a `Worker` instance operates in a case-sensitive manner
* unlike the main thread.
* @since v0.1.27
*/
env: ProcessEnv;
/**
* The `process.exit()` method instructs Node.js to terminate the process
* synchronously with an exit status of `code`. If `code` is omitted, exit uses
* either the 'success' code `0` or the value of `process.exitCode` if it has been
* set. Node.js will not terminate until all the `'exit'` event listeners are
* called.
*
* To exit with a 'failure' code:
*
* ```js
* import { exit } from 'node:process';
*
* exit(1);
* ```
*
* The shell that executed Node.js should see the exit code as `1`.
*
* Calling `process.exit()` will force the process to exit as quickly as possible
* even if there are still asynchronous operations pending that have not yet
* completed fully, including I/O operations to `process.stdout` and`process.stderr`.
*
* In most situations, it is not actually necessary to call `process.exit()`explicitly. The Node.js process will exit on its own _if there is no additional_
* _work pending_ in the event loop. The `process.exitCode` property can be set to
* tell the process which exit code to use when the process exits gracefully.
*
* For instance, the following example illustrates a _misuse_ of the`process.exit()` method that could lead to data printed to stdout being
* truncated and lost:
*
* ```js
* import { exit } from 'node:process';
*
* // This is an example of what *not* to do:
* if (someConditionNotMet()) {
* printUsageToStdout();
* exit(1);
* }
* ```
*
* The reason this is problematic is because writes to `process.stdout` in Node.js
* are sometimes _asynchronous_ and may occur over multiple ticks of the Node.js
* event loop. Calling `process.exit()`, however, forces the process to exit _before_ those additional writes to `stdout` can be performed.
*
* Rather than calling `process.exit()` directly, the code _should_ set the`process.exitCode` and allow the process to exit naturally by avoiding
* scheduling any additional work for the event loop:
*
* ```js
* import process fro |
m 'node:process';
*
* // How to properly set the exit code while letting
* // the process exit gracefully.
* if (someConditionNotMet()) {
* printUsageToStdout();
* process.exitCode = 1;
* }
* ```
*
* If it is necessary to terminate the Node.js process due to an error condition,
* throwing an _uncaught_ error and allowing the process to terminate accordingly
* is safer than calling `process.exit()`.
*
* In `Worker` threads, this function stops the current thread rather
* than the current process.
* @since v0.1.13
* @param [code=0] The exit code. For string type, only integer strings (e.g.,'1') are allowed.
*/
exit(code?: number): never;
/**
* A number which will be the process exit code, when the process either
* exits gracefully, or is exited via {@link exit} without specifying
* a code.
*
* Specifying a code to {@link exit} will override any
* previous setting of `process.exitCode`.
* @since v0.11.8
*/
exitCode?: number | undefined;
/**
* The `process.getgid()` method returns the numerical group identity of the
* process. (See [`getgid(2)`](http://man7.org/linux/man-pages/man2/getgid.2.html).)
*
* ```js
* import process from 'process';
*
* if (process.getgid) {
* console.log(`Current gid: ${process.getgid()}`);
* }
* ```
*
* This function is only available on POSIX platforms (i.e. not Windows or
* Android).
* @since v0.1.31
*/
getgid?: () => number;
/**
* The `process.setgid()` method sets the group identity of the process. (See [`setgid(2)`](http://man7.org/linux/man-pages/man2/setgid.2.html).) The `id` can be passed as either a
* numeric ID or a group name
* string. If a group name is specified, this method blocks while resolving the
* associated numeric ID.
*
* ```js
* import process from 'process';
*
* if (process.getgid && process.setgid) {
* console.log(`Current gid: ${process.getgid()}`);
* try {
* process.setgid(501);
* console.log(`New gid: ${process.getgid()}`);
* } catch (err) {
* console.log(`Failed to set gid: ${err}`);
* }
* }
* ```
*
* This function is only available on POSIX platforms (i.e. not Windows or
* Android).
* This feature is not available in `Worker` threads.
* @since v0.1.31
* @param id The group name or ID
*/
setgid?: (id: number | string) => void;
/**
* The `process.getuid()` method returns the numeric user identity of the process.
* (See [`getuid(2)`](http://man7.org/linux/man-pages/man2/getuid.2.html).)
*
* ```js
* import process from 'process';
*
* if (process.getuid) {
* console.log(`Current uid: ${process.getuid()}`);
* }
* ```
*
|
* This function is only available on POSIX platforms (i.e. not Windows or
* Android).
* @since v0.1.28
*/
getuid?: () => number;
/**
* The `process.setuid(id)` method sets the user identity of the process. (See [`setuid(2)`](http://man7.org/linux/man-pages/man2/setuid.2.html).) The `id` can be passed as either a
* numeric ID or a username string.
* If a username is specified, the method blocks while resolving the associated
* numeric ID.
*
* ```js
* import process from 'process';
*
* if (process.getuid && process.setuid) {
* console.log(`Current uid: ${process.getuid()}`);
* try {
* process.setuid(501);
* console.log(`New uid: ${process.getuid()}`);
* } catch (err) {
* console.log(`Failed to set uid: ${err}`);
* }
* }
* ```
*
* This function is only available on POSIX platforms (i.e. not Windows or
* Android).
* This feature is not available in `Worker` threads.
* @since v0.1.28
*/
setuid?: (id: number | string) => void;
/**
* The `process.geteuid()` method returns the numerical effective user identity of
* the process. (See [`geteuid(2)`](http://man7.org/linux/man-pages/man2/geteuid.2.html).)
*
* ```js
* import process from 'process';
*
* if (process.geteuid) {
* console.log(`Current uid: ${process.geteuid()}`);
* }
* ```
*
* This function is only available on POSIX platforms (i.e. not Windows or
* Android).
* @since v2.0.0
*/
geteuid?: () => number;
/**
* The `process.seteuid()` method sets the effective user identity of the process.
* (See [`seteuid(2)`](http://man7.org/linux/man-pages/man2/seteuid.2.html).) The `id` can be passed as either a numeric ID or a username
* string. If a username is specified, the method blocks while resolving the
* associated numeric ID.
*
* ```js
* import process from 'process';
*
* if (process.geteuid && process.seteuid) {
* console.log(`Current uid: ${process.geteuid()}`);
* try {
* process.seteuid(501);
* console.log(`New uid: ${process.geteuid()}`);
* } catch (err) {
* console.log(`Failed to set uid: ${err}`);
* }
* }
* ```
*
* This function is only available on POSIX platforms (i.e. not Windows or
* Android).
* This feature is not available in `Worker` threads.
* @since v2.0.0
* @param id A user name or ID
*/
seteuid?: (id: number | string) => void;
/**
* The `process.getegid()` method returns the numerical effective group identity
* of the Node.js process. (See [`getegid(2)`](http://man7.org/linux/man-pages/man2/getegid.2.html).)
*
* ```js
* import process from 'process';
*
* if (process.getegid) {
* console.log(`Current gid: ${process.getegid()}`); |
* }
* ```
*
* This function is only available on POSIX platforms (i.e. not Windows or
* Android).
* @since v2.0.0
*/
getegid?: () => number;
/**
* The `process.setegid()` method sets the effective group identity of the process.
* (See [`setegid(2)`](http://man7.org/linux/man-pages/man2/setegid.2.html).) The `id` can be passed as either a numeric ID or a group
* name string. If a group name is specified, this method blocks while resolving
* the associated a numeric ID.
*
* ```js
* import process from 'process';
*
* if (process.getegid && process.setegid) {
* console.log(`Current gid: ${process.getegid()}`);
* try {
* process.setegid(501);
* console.log(`New gid: ${process.getegid()}`);
* } catch (err) {
* console.log(`Failed to set gid: ${err}`);
* }
* }
* ```
*
* This function is only available on POSIX platforms (i.e. not Windows or
* Android).
* This feature is not available in `Worker` threads.
* @since v2.0.0
* @param id A group name or ID
*/
setegid?: (id: number | string) => void;
/**
* The `process.getgroups()` method returns an array with the supplementary group
* IDs. POSIX leaves it unspecified if the effective group ID is included but
* Node.js ensures it always is.
*
* ```js
* import process from 'process';
*
* if (process.getgroups) {
* console.log(process.getgroups()); // [ 16, 21, 297 ]
* }
* ```
*
* This function is only available on POSIX platforms (i.e. not Windows or
* Android).
* @since v0.9.4
*/
getgroups?: () => number[];
/**
* The `process.setgroups()` method sets the supplementary group IDs for the
* Node.js process. This is a privileged operation that requires the Node.js
* process to have `root` or the `CAP_SETGID` capability.
*
* The `groups` array can contain numeric group IDs, group names, or both.
*
* ```js
* import process from 'process';
*
* if (process.getgroups && process.setgroups) {
* try {
* process.setgroups([501]);
* console.log(process.getgroups()); // new groups
* } catch (err) {
* console.log(`Failed to set groups: ${err}`);
* }
* }
* ```
*
* This function is only available on POSIX platforms (i.e. not Windows or
* Android).
* This feature is not available in `Worker` threads.
* @since v0.9.4
*/
setgroups?: (groups: ReadonlyArray<string | number>) => void;
/**
* The `process.setUncaughtExceptionCaptureCallback()` function sets a function
* that will be invoked when an uncaught exception occurs, which will receive the
* exception value itself as its first argument.
*
* If such a function is set, the `'uncaughtExceptio |
n'` event will
* not be emitted. If `--abort-on-uncaught-exception` was passed from the
* command line or set through `v8.setFlagsFromString()`, the process will
* not abort. Actions configured to take place on exceptions such as report
* generations will be affected too
*
* To unset the capture function,`process.setUncaughtExceptionCaptureCallback(null)` may be used. Calling this
* method with a non-`null` argument while another capture function is set will
* throw an error.
*
* Using this function is mutually exclusive with using the deprecated `domain` built-in module.
* @since v9.3.0
*/
setUncaughtExceptionCaptureCallback(cb: ((err: Error) => void) | null): void;
/**
* Indicates whether a callback has been set using {@link setUncaughtExceptionCaptureCallback}.
* @since v9.3.0
*/
hasUncaughtExceptionCaptureCallback(): boolean;
/**
* The `process.sourceMapsEnabled` property returns whether the [Source Map v3](https://sourcemaps.info/spec.html) support for stack traces is enabled.
* @since v20.7.0
* @experimental
*/
readonly sourceMapsEnabled: boolean;
/**
* This function enables or disables the [Source Map v3](https://sourcemaps.info/spec.html) support for
* stack traces.
*
* It provides same features as launching Node.js process with commandline options`--enable-source-maps`.
*
* Only source maps in JavaScript files that are loaded after source maps has been
* enabled will be parsed and loaded.
* @since v16.6.0, v14.18.0
* @experimental
*/
setSourceMapsEnabled(value: boolean): void;
/**
* The `process.version` property contains the Node.js version string.
*
* ```js
* import { version } from 'node:process';
*
* console.log(`Version: ${version}`);
* // Version: v14.8.0
* ```
*
* To get the version string without the prepended _v_, use`process.versions.node`.
* @since v0.1.3
*/
readonly version: string;
/**
* The `process.versions` property returns an object listing the version strings of
* Node.js and its dependencies. `process.versions.modules` indicates the current
* ABI version, which is increased whenever a C++ API changes. Node.js will refuse
* to load modules that were compiled against a different module ABI version.
*
* ```js
* import { versions } from 'node:process';
*
* console.log(versions);
* ```
*
* Will generate an object similar to:
*
* ```console
* { node: '20.2.0',
* acorn: '8.8.2',
* ada: '2.4.0',
* ares: '1.19.0',
* base64: '0.5.0',
* brotli: '1.0.9',
* cjs_module_lexer: '1.2.2',
* cldr: '43.0',
* icu: '73.1',
* llhttp: '8.1.0',
* modules: '115',
* napi: '8',
* nghttp2: '1.52.0',
* nghttp3: '0.7.0',
* ngtcp2: '0.8.1',
* openssl: '3.0.8+qu |
ic',
* simdutf: '3.2.9',
* tz: '2023c',
* undici: '5.22.0',
* unicode: '15.0',
* uv: '1.44.2',
* uvwasi: '0.0.16',
* v8: '11.3.244.8-node.9',
* zlib: '1.2.13' }
* ```
* @since v0.2.0
*/
readonly versions: ProcessVersions;
/**
* The `process.config` property returns a frozen `Object` containing the
* JavaScript representation of the configure options used to compile the current
* Node.js executable. This is the same as the `config.gypi` file that was produced
* when running the `./configure` script.
*
* An example of the possible output looks like:
*
* ```js
* {
* target_defaults:
* { cflags: [],
* default_configuration: 'Release',
* defines: [],
* include_dirs: [],
* libraries: [] },
* variables:
* {
* host_arch: 'x64',
* napi_build_version: 5,
* node_install_npm: 'true',
* node_prefix: '',
* node_shared_cares: 'false',
* node_shared_http_parser: 'false',
* node_shared_libuv: 'false',
* node_shared_zlib: 'false',
* node_use_openssl: 'true',
* node_shared_openssl: 'false',
* strict_aliasing: 'true',
* target_arch: 'x64',
* v8_use_snapshot: 1
* }
* }
* ```
* @since v0.7.7
*/
readonly config: ProcessConfig;
/**
* The `process.kill()` method sends the `signal` to the process identified by`pid`.
*
* Signal names are strings such as `'SIGINT'` or `'SIGHUP'`. See `Signal Events` and [`kill(2)`](http://man7.org/linux/man-pages/man2/kill.2.html) for more information.
*
* This method will throw an error if the target `pid` does not exist. As a special
* case, a signal of `0` can be used to test for the existence of a process.
* Windows platforms will throw an error if the `pid` is used to kill a process
* group.
*
* Even though the name of this function is `process.kill()`, it is really just a
* signal sender, like the `kill` system call. The signal sent may do something
* other than kill the target process.
*
* ```js
* import process, { kill } from 'node:process';
*
* process.on('SIGHUP', () => {
* console.log('Got SIGHUP signal.');
* });
*
* setTimeout(() => {
* console.log('Exiting.');
* process.exit(0);
* }, 100);
*
* kill(process.pid, 'SIGHUP');
* ```
*
* When `SIGUSR1` is received by a Node.js process, Node.js will start the
* debugger. See `Signal Events`.
* @since v0.0.6
* @param pid A process ID
* @param [signal='SIGTERM'] The signal to send, either as a string or number.
*/
kill(pid: number, signal?: string | number): true;
/**
* The `process.pid` property returns |
the PID of the process.
*
* ```js
* import { pid } from 'node:process';
*
* console.log(`This process is pid ${pid}`);
* ```
* @since v0.1.15
*/
readonly pid: number;
/**
* The `process.ppid` property returns the PID of the parent of the
* current process.
*
* ```js
* import { ppid } from 'node:process';
*
* console.log(`The parent process is pid ${ppid}`);
* ```
* @since v9.2.0, v8.10.0, v6.13.0
*/
readonly ppid: number;
/**
* The `process.title` property returns the current process title (i.e. returns
* the current value of `ps`). Assigning a new value to `process.title` modifies
* the current value of `ps`.
*
* When a new value is assigned, different platforms will impose different maximum
* length restrictions on the title. Usually such restrictions are quite limited.
* For instance, on Linux and macOS, `process.title` is limited to the size of the
* binary name plus the length of the command-line arguments because setting the`process.title` overwrites the `argv` memory of the process. Node.js v0.8
* allowed for longer process title strings by also overwriting the `environ`memory but that was potentially insecure and confusing in some (rather obscure)
* cases.
*
* Assigning a value to `process.title` might not result in an accurate label
* within process manager applications such as macOS Activity Monitor or Windows
* Services Manager.
* @since v0.1.104
*/
title: string;
/**
* The operating system CPU architecture for which the Node.js binary was compiled.
* Possible values are: `'arm'`, `'arm64'`, `'ia32'`, `'loong64'`, `'mips'`,`'mipsel'`, `'ppc'`, `'ppc64'`, `'riscv64'`, `'s390'`, `'s390x'`, and `'x64'`.
*
* ```js
* import { arch } from 'node:process';
*
* console.log(`This processor architecture is ${arch}`);
* ```
* @since v0.5.0
*/
readonly arch: Architecture;
/**
* The `process.platform` property returns a string identifying the operating
* system platform for which the Node.js binary was compiled.
*
* Currently possible values are:
*
* * `'aix'`
* * `'darwin'`
* * `'freebsd'`
* * `'linux'`
* * `'openbsd'`
* * `'sunos'`
* * `'win32'`
*
* ```js
* import { platform } from 'node:process';
*
* console.log(`This platform is ${platform}`);
* ```
*
* The value `'android'` may also be returned if the Node.js is built on the
* Android operating system. However, Android support in Node.js [is experimental](https://github.com/nodejs/node/blob/HEAD/BUILDING.md#androidandroid-based-devices-eg-firefox-os).
* @since v0.1.16
*/
readonly platform: Platform;
/**
* The `process.mainModule` property provides an alternative way of retrieving `require.main`. The difference is that if the main module changes at
* runtime, `require. |
main` may still refer to the original main module in
* modules that were required before the change occurred. Generally, it's
* safe to assume that the two refer to the same module.
*
* As with `require.main`, `process.mainModule` will be `undefined` if there
* is no entry script.
* @since v0.1.17
* @deprecated Since v14.0.0 - Use `main` instead.
*/
mainModule?: Module | undefined;
memoryUsage: MemoryUsageFn;
/**
* Gets the amount of memory available to the process (in bytes) based on
* limits imposed by the OS. If there is no such constraint, or the constraint
* is unknown, `undefined` is returned.
*
* See [`uv_get_constrained_memory`](https://docs.libuv.org/en/v1.x/misc.html#c.uv_get_constrained_memory) for more
* information.
* @since v19.6.0, v18.15.0
* @experimental
*/
constrainedMemory(): number | undefined;
/**
* The `process.cpuUsage()` method returns the user and system CPU time usage of
* the current process, in an object with properties `user` and `system`, whose
* values are microsecond values (millionth of a second). These values measure time
* spent in user and system code respectively, and may end up being greater than
* actual elapsed time if multiple CPU cores are performing work for this process.
*
* The result of a previous call to `process.cpuUsage()` can be passed as the
* argument to the function, to get a diff reading.
*
* ```js
* import { cpuUsage } from 'node:process';
*
* const startUsage = cpuUsage();
* // { user: 38579, system: 6986 }
*
* // spin the CPU for 500 milliseconds
* const now = Date.now();
* while (Date.now() - now < 500);
*
* console.log(cpuUsage(startUsage));
* // { user: 514883, system: 11226 }
* ```
* @since v6.1.0
* @param previousValue A previous return value from calling `process.cpuUsage()`
*/
cpuUsage(previousValue?: CpuUsage): CpuUsage;
/**
* `process.nextTick()` adds `callback` to the "next tick queue". This queue is
* fully drained after the current operation on the JavaScript stack runs to
* completion and before the event loop is allowed to continue. It's possible to
* create an infinite loop if one were to recursively call `process.nextTick()`.
* See the [Event Loop](https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/#process-nexttick) guide for more background.
*
* ```js
* import { nextTick } from 'node:process';
*
* console.log('start');
* nextTick(() => {
* console.log('nextTick callback');
* });
* console.log('scheduled');
* // Output:
* // start
* // scheduled
* // nextTick callback
* ```
*
* This is important when developing APIs in order to give users the opportunity
* to assign event handlers _after_ an object has been constructed but before any
* I/O has occurred:
*
* ```js
* import { nextTick } from 'node |
:process';
*
* function MyThing(options) {
* this.setupOptions(options);
*
* nextTick(() => {
* this.startDoingStuff();
* });
* }
*
* const thing = new MyThing();
* thing.getReadyForStuff();
*
* // thing.startDoingStuff() gets called now, not before.
* ```
*
* It is very important for APIs to be either 100% synchronous or 100%
* asynchronous. Consider this example:
*
* ```js
* // WARNING! DO NOT USE! BAD UNSAFE HAZARD!
* function maybeSync(arg, cb) {
* if (arg) {
* cb();
* return;
* }
*
* fs.stat('file', cb);
* }
* ```
*
* This API is hazardous because in the following case:
*
* ```js
* const maybeTrue = Math.random() > 0.5;
*
* maybeSync(maybeTrue, () => {
* foo();
* });
*
* bar();
* ```
*
* It is not clear whether `foo()` or `bar()` will be called first.
*
* The following approach is much better:
*
* ```js
* import { nextTick } from 'node:process';
*
* function definitelyAsync(arg, cb) {
* if (arg) {
* nextTick(cb);
* return;
* }
*
* fs.stat('file', cb);
* }
* ```
* @since v0.1.26
* @param args Additional arguments to pass when invoking the `callback`
*/
nextTick(callback: Function, ...args: any[]): void;
/**
* The `process.release` property returns an `Object` containing metadata related
* to the current release, including URLs for the source tarball and headers-only
* tarball.
*
* `process.release` contains the following properties:
*
* ```js
* {
* name: 'node',
* lts: 'Hydrogen',
* sourceUrl: 'https://nodejs.org/download/release/v18.12.0/node-v18.12.0.tar.gz',
* headersUrl: 'https://nodejs.org/download/release/v18.12.0/node-v18.12.0-headers.tar.gz',
* libUrl: 'https://nodejs.org/download/release/v18.12.0/win-x64/node.lib'
* }
* ```
*
* In custom builds from non-release versions of the source tree, only the`name` property may be present. The additional properties should not be
* relied upon to exist.
* @since v3.0.0
*/
readonly release: ProcessRelease;
features: {
inspector: boolean;
debug: boolean;
uv: boolean;
ipv6: boolean;
tls_alpn: boolean;
tls_sni: boolean;
tls_ocsp: boolean;
tls: boolean;
};
/**
* `process.umask()` returns the Node.js process's file mode creation mask. Child
* processes inherit the mask from the parent process.
* @since v0.1.19
* @deprecated Calling `process.umask()` with no argum |
ent causes the process-wide umask to be written twice. This introduces a race condition between threads, and is a potential *
* security vulnerability. There is no safe, cross-platform alternative API.
*/
umask(): number;
/**
* Can only be set if not in worker thread.
*/
umask(mask: string | number): number;
/**
* The `process.uptime()` method returns the number of seconds the current Node.js
* process has been running.
*
* The return value includes fractions of a second. Use `Math.floor()` to get whole
* seconds.
* @since v0.5.0
*/
uptime(): number;
hrtime: HRTime;
/**
* If the Node.js process was spawned with an IPC channel, the process.channel property is a reference to the IPC channel.
* If no IPC channel exists, this property is undefined.
* @since v7.1.0
*/
channel?: {
/**
* This method makes the IPC channel keep the event loop of the process running if .unref() has been called before.
* @since v7.1.0
*/
ref(): void;
/**
* This method makes the IPC channel not keep the event loop of the process running, and lets it finish even while the channel is open.
* @since v7.1.0
*/
unref(): void;
};
/**
* If Node.js is spawned with an IPC channel, the `process.send()` method can be
* used to send messages to the parent process. Messages will be received as a `'message'` event on the parent's `ChildProcess` object.
*
* If Node.js was not spawned with an IPC channel, `process.send` will be `undefined`.
*
* The message goes through serialization and parsing. The resulting message might
* not be the same as what is originally sent.
* @since v0.5.9
* @param options used to parameterize the sending of certain types of handles.`options` supports the following properties:
*/
send?(
message: any,
sendHandle?: any,
options?: {
swallowErrors?: boolean | undefined;
},
callback?: (error: Error | null) => void,
): boolean;
/**
* If the Node.js process is spawned with an IPC channel (see the `Child Process` and `Cluster` documentation), the `process.disconnect()` method will close the
* IPC channel to the parent process, allowing the child process to exit gracefully
* once there are no other connections keeping it alive.
*
* The effect of calling `process.disconnect()` is the same as calling `ChildProcess.disconnect()` from the parent process.
*
* If the Node.js process was not spawned with an IPC channel,`process.disconnect()` will be `undefined`.
* @since v0.7.2
*/
disconnect(): void;
/**
* If the Node.js process is spawned with an IPC channel (see the `Child Process` and `Cluster` documentation), the `process.connected` property will return`true` so long as the IPC
* channel is connected and will return `false` after`process.disconnect()` is called.
*
* Once `process.connected` is `false`, it is no longer possible to send messages
|
* over the IPC channel using `process.send()`.
* @since v0.7.2
*/
connected: boolean;
/**
* The `process.allowedNodeEnvironmentFlags` property is a special,
* read-only `Set` of flags allowable within the `NODE_OPTIONS` environment variable.
*
* `process.allowedNodeEnvironmentFlags` extends `Set`, but overrides`Set.prototype.has` to recognize several different possible flag
* representations. `process.allowedNodeEnvironmentFlags.has()` will
* return `true` in the following cases:
*
* * Flags may omit leading single (`-`) or double (`--`) dashes; e.g.,`inspect-brk` for `--inspect-brk`, or `r` for `-r`.
* * Flags passed through to V8 (as listed in `--v8-options`) may replace
* one or more _non-leading_ dashes for an underscore, or vice-versa;
* e.g., `--perf_basic_prof`, `--perf-basic-prof`, `--perf_basic-prof`,
* etc.
* * Flags may contain one or more equals (`=`) characters; all
* characters after and including the first equals will be ignored;
* e.g., `--stack-trace-limit=100`.
* * Flags _must_ be allowable within `NODE_OPTIONS`.
*
* When iterating over `process.allowedNodeEnvironmentFlags`, flags will
* appear only _once_; each will begin with one or more dashes. Flags
* passed through to V8 will contain underscores instead of non-leading
* dashes:
*
* ```js
* import { allowedNodeEnvironmentFlags } from 'node:process';
*
* allowedNodeEnvironmentFlags.forEach((flag) => {
* // -r
* // --inspect-brk
* // --abort_on_uncaught_exception
* // ...
* });
* ```
*
* The methods `add()`, `clear()`, and `delete()` of`process.allowedNodeEnvironmentFlags` do nothing, and will fail
* silently.
*
* If Node.js was compiled _without_ `NODE_OPTIONS` support (shown in {@link config}), `process.allowedNodeEnvironmentFlags` will
* contain what _would have_ been allowable.
* @since v10.10.0
*/
allowedNodeEnvironmentFlags: ReadonlySet<string>;
/**
* `process.report` is an object whose methods are used to generate diagnostic
* reports for the current process. Additional documentation is available in the `report documentation`.
* @since v11.8.0
*/
report?: ProcessReport | undefined;
/**
* ```js
* import { resourceUsage } from 'node:process';
*
* console.log(resourceUsage());
* /*
* Will output:
* {
* userCPUTime: 82872,
* systemCPUTime: 4143,
* maxRSS: 33164,
* sharedMemorySize: 0,
* unsharedDataSize: 0,
* unsharedStackSize: 0,
* minorPageFault: 2469,
* majorPageFault: 0,
* swappedOut: 0,
* fsRead: 0,
* fsWrite: 8,
* ipcSent: 0,
* ipcReceived: 0,
* signalsCount: 0,
* voluntaryContextSwitches: 79,
* involuntaryContextSwitches: 1
* }
*
* ```
* @since v12.6.0
|
* @return the resource usage for the current process. All of these values come from the `uv_getrusage` call which returns a [`uv_rusage_t` struct][uv_rusage_t].
*/
resourceUsage(): ResourceUsage;
/**
* The `process.traceDeprecation` property indicates whether the`--trace-deprecation` flag is set on the current Node.js process. See the
* documentation for the `'warning' event` and the `emitWarning() method` for more information about this
* flag's behavior.
* @since v0.8.0
*/
traceDeprecation: boolean;
/* EventEmitter */
addListener(event: "beforeExit", listener: BeforeExitListener): this;
addListener(event: "disconnect", listener: DisconnectListener): this;
addListener(event: "exit", listener: ExitListener): this;
addListener(event: "rejectionHandled", listener: RejectionHandledListener): this;
addListener(event: "uncaughtException", listener: UncaughtExceptionListener): this;
addListener(event: "uncaughtExceptionMonitor", listener: UncaughtExceptionListener): this;
addListener(event: "unhandledRejection", listener: UnhandledRejectionListener): this;
addListener(event: "warning", listener: WarningListener): this;
addListener(event: "message", listener: MessageListener): this;
addListener(event: Signals, listener: SignalsListener): this;
addListener(event: "multipleResolves", listener: MultipleResolveListener): this;
addListener(event: "worker", listener: WorkerListener): this;
emit(event: "beforeExit", code: number): boolean;
emit(event: "disconnect"): boolean;
emit(event: "exit", code: number): boolean;
emit(event: "rejectionHandled", promise: Promise<unknown>): boolean;
emit(event: "uncaughtException", error: Error): boolean;
emit(event: "uncaughtExceptionMonitor", error: Error): boolean;
emit(event: "unhandledRejection", reason: unknown, promise: Promise<unknown>): boolean;
emit(event: "warning", warning: Error): boolean;
emit(event: "message", message: unknown, sendHandle: unknown): this;
emit(event: Signals, signal?: Signals): boolean;
emit(
event: "multipleResolves",
type: MultipleResolveType,
promise: Promise<unknown>,
value: unknown,
): this;
emit(event: "worker", listener: WorkerListener): this;
on(event: "beforeExit", listener: BeforeExitListener): this;
on(event: "disconnect", listener: DisconnectListener): this;
on(event: "exit", listener: ExitListener): this;
on(event: "rejectionHandled", listener: RejectionHandledListener): this;
on(event: "uncaughtException", listener: UncaughtExceptionListener): this;
on(event: "uncaughtExceptionMonitor", listener: UncaughtExceptionListener): this;
on(event: "unhandledRejection", listener: UnhandledRejectionListener): this;
on(event: "warning", listener: WarningListener): this;
on(event: "message", listener: MessageListener): this;
on(event: Signals, listener: SignalsListener): this;
on(event: "multipleResolves", listener: MultipleResolveListener): this;
on(event: "worker", listener: WorkerListener): this;
on(event: string | symbol, listener: (...args: any[]) => void): this;
once(event: "beforeExit", listener: BeforeExitListener): this;
once(event: "disconnect", listener: DisconnectListener): this;
|
once(event: "exit", listener: ExitListener): this;
once(event: "rejectionHandled", listener: RejectionHandledListener): this;
once(event: "uncaughtException", listener: UncaughtExceptionListener): this;
once(event: "uncaughtExceptionMonitor", listener: UncaughtExceptionListener): this;
once(event: "unhandledRejection", listener: UnhandledRejectionListener): this;
once(event: "warning", listener: WarningListener): this;
once(event: "message", listener: MessageListener): this;
once(event: Signals, listener: SignalsListener): this;
once(event: "multipleResolves", listener: MultipleResolveListener): this;
once(event: "worker", listener: WorkerListener): this;
once(event: string | symbol, listener: (...args: any[]) => void): this;
prependListener(event: "beforeExit", listener: BeforeExitListener): this;
prependListener(event: "disconnect", listener: DisconnectListener): this;
prependListener(event: "exit", listener: ExitListener): this;
prependListener(event: "rejectionHandled", listener: RejectionHandledListener): this;
prependListener(event: "uncaughtException", listener: UncaughtExceptionListener): this;
prependListener(event: "uncaughtExceptionMonitor", listener: UncaughtExceptionListener): this;
prependListener(event: "unhandledRejection", listener: UnhandledRejectionListener): this;
prependListener(event: "warning", listener: WarningListener): this;
prependListener(event: "message", listener: MessageListener): this;
prependListener(event: Signals, listener: SignalsListener): this;
prependListener(event: "multipleResolves", listener: MultipleResolveListener): this;
prependListener(event: "worker", listener: WorkerListener): this;
prependOnceListener(event: "beforeExit", listener: BeforeExitListener): this;
prependOnceListener(event: "disconnect", listener: DisconnectListener): this;
prependOnceListener(event: "exit", listener: ExitListener): this;
prependOnceListener(event: "rejectionHandled", listener: RejectionHandledListener): this;
prependOnceListener(event: "uncaughtException", listener: UncaughtExceptionListener): this;
prependOnceListener(event: "uncaughtExceptionMonitor", listener: UncaughtExceptionListener): this;
prependOnceListener(event: "unhandledRejection", listener: UnhandledRejectionListener): this;
prependOnceListener(event: "warning", listener: WarningListener): this;
prependOnceListener(event: "message", listener: MessageListener): this;
prependOnceListener(event: Signals, listener: SignalsListener): this;
prependOnceListener(event: "multipleResolves", listener: MultipleResolveListener): this;
prependOnceListener(event: "worker", listener: WorkerListener): this;
listeners(event: "beforeExit"): BeforeExitListener[];
listeners(event: "disconnect"): DisconnectListener[];
listeners(event: "exit"): ExitListener[];
listeners(event: "rejectionHandled"): RejectionHandledListener[];
listeners(event: "uncaughtException"): UncaughtExceptionListener[];
listeners(event: "uncaughtExceptionMonitor"): UncaughtExceptionListener[];
listeners(event: "unhandledRejection"): UnhandledRejectionListener[];
listeners(event: "warning"): WarningListener[];
listeners(event: "message"): MessageListener[];
listeners(event: Signals): SignalsListener[];
listeners(event: "multipleResolves"): MultipleResolveListener[];
|
listeners(event: "worker"): WorkerListener[];
}
}
}
export = process;
}
declare module "node:process" {
import process = require("process");
export = process;
}
|
/**
* **The `node:wasi` module does not currently provide the**
* **comprehensive file system security properties provided by some WASI runtimes.**
* **Full support for secure file system sandboxing may or may not be implemented in**
* **future. In the mean time, do not rely on it to run untrusted code.**
*
* The WASI API provides an implementation of the [WebAssembly System Interface](https://wasi.dev/) specification. WASI gives WebAssembly applications access to the underlying
* operating system via a collection of POSIX-like functions.
*
* ```js
* import { readFile } from 'node:fs/promises';
* import { WASI } from 'wasi';
* import { argv, env } from 'node:process';
*
* const wasi = new WASI({
* version: 'preview1',
* args: argv,
* env,
* preopens: {
* '/local': '/some/real/path/that/wasm/can/access',
* },
* });
*
* const wasm = await WebAssembly.compile(
* await readFile(new URL('./demo.wasm', import.meta.url)),
* );
* const instance = await WebAssembly.instantiate(wasm, wasi.getImportObject());
*
* wasi.start(instance);
* ```
*
* To run the above example, create a new WebAssembly text format file named`demo.wat`:
*
* ```text
* (module
* ;; Import the required fd_write WASI function which will write the given io vectors to stdout
* ;; The function signature for fd_write is:
* ;; (File Descriptor, *iovs, iovs_len, nwritten) -> Returns number of bytes written
* (import "wasi_snapshot_preview1" "fd_write" (func $fd_write (param i32 i32 i32 i32) (result i32)))
*
* (memory 1)
* (export "memory" (memory 0))
*
* ;; Write 'hello world\n' to memory at an offset of 8 bytes
* ;; Note the trailing newline which is required for the text to appear
* (data (i32.const 8) "hello world\n")
*
* (func $main (export "_start")
* ;; Creating a new io vector within linear memory
* (i32.store (i32.const 0) (i32.const 8)) ;; iov.iov_base - This is a pointer to the start of the 'hello world\n' string
* (i32.store (i32.const 4) (i32.const 12)) ;; iov.iov_len - The length of the 'hello world\n' string
*
* (call $fd_write
* (i32.const 1) ;; file_descriptor - 1 for stdout
* (i32.const 0) ;; *iovs - The pointer to the iov array, which is stored at memory location 0
* (i32.const 1) ;; iovs_len - We're printing 1 string stored in an iov - so one.
* (i32.const 20) ;; nwritten - A place in memory to store the number of bytes written
* )
* drop ;; Discard the number of bytes written from the top of the stack
* )
* )
* ```
*
* Use [wabt](https://github.com/WebAssembly/wabt) to compile `.wat` to `.wasm`
*
* ```bash
* wat2wasm demo.wat
* ```
* @experimental
* @see [source](https://github.com/nodejs/node/blob/v20.2.0/lib/wasi.js)
*/
declare module "wasi" {
interface WASIOptions {
/**
* An array of strings that the WebAssembly application will
* see as command line arguments. The first argument is the virtual path to the
* WASI command itself.
*/
args?: string[] | undefined;
/**
* An object similar to `process.env` that the WebAssembly
* application will see as its environment.
*/
env?: object | undefined;
/**
* This object represents the WebAssembly application's
* sandbox directory structure. The string keys of `preopens` are treated as
* directories within the sandbox. The corresponding values in `preopens` are
* the real paths to those directories on the host machine.
*/
preopens?: NodeJS.Dict<string> | undefined;
/**
* By default, when WASI applications call `__wasi_proc_exit()`
* `wasi.start()` will return with the exit code specified rather than terminatng the process.
* Setting this option to `false` will cause the Node.js process to exit wi |
th
* the specified exit code instead.
* @default true
*/
returnOnExit?: boolean | undefined;
/**
* The file descriptor used as standard input in the WebAssembly application.
* @default 0
*/
stdin?: number | undefined;
/**
* The file descriptor used as standard output in the WebAssembly application.
* @default 1
*/
stdout?: number | undefined;
/**
* The file descriptor used as standard error in the WebAssembly application.
* @default 2
*/
stderr?: number | undefined;
/**
* The version of WASI requested.
* Currently the only supported versions are `'unstable'` and `'preview1'`.
* @since v20.0.0
*/
version: string;
}
/**
* The `WASI` class provides the WASI system call API and additional convenience
* methods for working with WASI-based applications. Each `WASI` instance
* represents a distinct environment.
* @since v13.3.0, v12.16.0
*/
class WASI {
constructor(options?: WASIOptions);
/**
* Return an import object that can be passed to `WebAssembly.instantiate()` if no other WASM imports are needed beyond those provided by WASI.
*
* If version `unstable` was passed into the constructor it will return:
*
* ```js
* { wasi_unstable: wasi.wasiImport }
* ```
*
* If version `preview1` was passed into the constructor or no version was specified it will return:
*
* ```js
* { wasi_snapshot_preview1: wasi.wasiImport }
* ```
* @since v19.8.0
*/
getImportObject(): object;
/**
* Attempt to begin execution of `instance` as a WASI command by invoking its`_start()` export. If `instance` does not contain a `_start()` export, or if`instance` contains an `_initialize()`
* export, then an exception is thrown.
*
* `start()` requires that `instance` exports a [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) named`memory`. If
* `instance` does not have a `memory` export an exception is thrown.
*
* If `start()` is called more than once, an exception is thrown.
* @since v13.3.0, v12.16.0
*/
start(instance: object): number; // TODO: avoid DOM dependency until WASM moved to own lib.
/**
* Attempt to initialize `instance` as a WASI reactor by invoking its`_initialize()` export, if it is present. If `instance` contains a `_start()`export, then an exception is thrown.
*
* `initialize()` requires that `instance` exports a [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) named`memory`.
* If `instance` does not have a `memory` export an exception is thrown.
*
* If `initialize()` is called more than once, an exception is thrown.
* @since v14.6.0, v12.19.0
*/
initialize(instance: object): void; // TODO: avoid DOM dependency until WASM moved to own lib.
/**
* `wasiImport` is an object that implements the WASI system call API. This object
* should be passed as the `wasi_snapshot_preview1` import during the instantiation
* of a [`WebAssembly.Instance`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Instance).
* @since v13.3.0, v12.16.0
*/
readonly wasiImport: NodeJS.Dict<any>; // TODO: Narrow to DOM types
}
}
declare module "node:wasi" {
export * from "wasi";
}
|
/**
* License for programmatically and manually incorporated
* documentation aka. `JSDoc` from https://github.com/nodejs/node/tree/master/doc
*
* Copyright Node.js contributors. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
// NOTE: These definitions support NodeJS and TypeScript 4.9+.
// Reference required types from the default lib:
/// <reference lib="es2020" />
/// <reference lib="esnext.asynciterable" />
/// <reference lib="esnext.intl" />
/// <reference lib="esnext.bigint" />
// Base definitions for all NodeJS modules that are not specific to any version of TypeScript:
/// <reference path="assert.d.ts" />
/// <reference path="assert/strict.d.ts" />
/// <reference path="globals.d.ts" />
/// <reference path="async_hooks.d.ts" />
/// <reference path="buffer.d.ts" />
/// <reference path="child_process.d.ts" />
/// <reference path="cluster.d.ts" />
/// <reference path="console.d.ts" />
/// <reference path="constants.d.ts" />
/// <reference path="crypto.d.ts" />
/// <reference path="dgram.d.ts" />
/// <reference path="diagnostics_channel.d.ts" />
/// <reference path="dns.d.ts" />
/// <reference path="dns/promises.d.ts" />
/// <reference path="dns/promises.d.ts" />
/// <reference path="domain.d.ts" />
/// <reference path="dom-events.d.ts" />
/// <reference path="events.d.ts" />
/// <reference path="fs.d.ts" />
/// <reference path="fs/promises.d.ts" />
/// <reference path="http.d.ts" />
/// <reference path="http2.d.ts" />
/// <reference path="https.d.ts" />
/// <reference path="inspector.d.ts" />
/// <reference path="module.d.ts" />
/// <reference path="net.d.ts" />
/// <reference path="os.d.ts" />
/// <reference path="path.d.ts" />
/// <reference path="perf_hooks.d.ts" />
/// <reference path="process.d.ts" />
/// <reference path="punycode.d.ts" />
/// <reference path="querystring.d.ts" />
/// <reference path="readline.d.ts" />
/// <reference path="readline/promises.d.ts" />
/// <reference path="repl.d.ts" />
/// <reference path="stream.d.ts" />
/// <reference path="stream/promises.d.ts" />
/// <reference path="stream/consumers.d.ts" />
/// <reference path="stream/web.d.ts" />
/// <reference path="string_decoder.d.ts" />
/// <reference path="test.d.ts" />
/// <reference path="timers.d.ts" />
/// <reference path="timers/promises.d.ts" />
/// <reference path="tls.d.ts" />
/// <reference path="trace_events.d.ts" />
/// <reference path="tty.d.ts" />
/// <reference path="url.d.ts" />
/// <reference path="util.d.ts" />
/// <reference path="v8.d.ts" />
/// <reference path="vm.d.ts" />
/// <reference path="wasi.d.ts" />
/// <reference path="worker_threads.d.ts" />
/// <reference path="zlib.d.ts" />
/// <reference path="globals.global.d.ts" />
|
/**
* > Stability: 2 - Stable
*
* The `node:net` module provides an asynchronous network API for creating stream-based
* TCP or `IPC` servers ({@link createServer}) and clients
* ({@link createConnection}).
*
* It can be accessed using:
*
* ```js
* const net = require('node:net');
* ```
* @see [source](https://github.com/nodejs/node/blob/v20.2.0/lib/net.js)
*/
declare module "net" {
import * as stream from "node:stream";
import { Abortable, EventEmitter } from "node:events";
import * as dns from "node:dns";
type LookupFunction = (
hostname: string,
options: dns.LookupOptions,
callback: (err: NodeJS.ErrnoException | null, address: string | dns.LookupAddress[], family?: number) => void,
) => void;
interface AddressInfo {
address: string;
family: string;
port: number;
}
interface SocketConstructorOpts {
fd?: number | undefined;
allowHalfOpen?: boolean | undefined;
readable?: boolean | undefined;
writable?: boolean | undefined;
signal?: AbortSignal;
}
interface OnReadOpts {
buffer: Uint8Array | (() => Uint8Array);
/**
* This function is called for every chunk of incoming data.
* Two arguments are passed to it: the number of bytes written to buffer and a reference to buffer.
* Return false from this function to implicitly pause() the socket.
*/
callback(bytesWritten: number, buf: Uint8Array): boolean;
}
interface ConnectOpts {
/**
* If specified, incoming data is stored in a single buffer and passed to the supplied callback when data arrives on the socket.
* Note: this will cause the streaming functionality to not provide any data, however events like 'error', 'end', and 'close' will
* still be emitted as normal and methods like pause() and resume() will also behave as expected.
*/
onread?: OnReadOpts | undefined;
}
interface TcpSocketConnectOpts extends ConnectOpts {
port: number;
host?: string | undefined;
localAddress?: string | undefined;
localPort?: number | undefined;
hints?: number | undefined;
family?: number | undefined;
lookup?: LookupFunction | undefined;
noDelay?: boolean | undefined;
keepAlive?: boolean | undefined;
keepAliveInitialDelay?: number | undefined;
/**
* @since v18.13.0
*/
autoSelectFamily?: boolean | undefined;
/**
* @since v18.13.0
*/
autoSelectFamilyAttemptTimeout?: number | undefined;
}
interface IpcSocketConnectOpts extends ConnectOpts {
path: string;
}
type SocketConnectOpts = TcpSocketConnectOpts | IpcSocketConnectOpts;
type SocketReadyState = "opening" | "open" | "readOnly" | "writeOnly" | "closed";
/**
* This class is an abstraction of a TCP socket or a streaming `IPC` endpoint
* (uses named pipes on Windows, and Unix domain sockets otherwise). It is also
* an `EventEmitter`.
*
* A `net.Socket` can be created by the user and used directly to interact with
* a server. For example, it is returned by {@link createConnection},
* so the user can use it to talk to the server.
*
* It can also be created by Node.js and passed to the user when a connection
* is received. For example, it is passed to the listeners of a `'connection'` event emitted on a {@link Server}, so the user can use
* it to interact with the client.
* @since v0.3.4
*/
class Socket extends stream.Duplex {
constructor(options?: SocketConstructorOpts);
/**
* Destroys the socket after all data is written. If the `finish` event was already emitted the socket is destroyed immediately.
* If the socket is still writable it implicitly calls `socket.end()`.
* @since v0.3.4
*/
dest |
roySoon(): void;
/**
* Sends data on the socket. The second parameter specifies the encoding in the
* case of a string. It defaults to UTF8 encoding.
*
* Returns `true` if the entire data was flushed successfully to the kernel
* buffer. Returns `false` if all or part of the data was queued in user memory.`'drain'` will be emitted when the buffer is again free.
*
* The optional `callback` parameter will be executed when the data is finally
* written out, which may not be immediately.
*
* See `Writable` stream `write()` method for more
* information.
* @since v0.1.90
* @param [encoding='utf8'] Only used when data is `string`.
*/
write(buffer: Uint8Array | string, cb?: (err?: Error) => void): boolean;
write(str: Uint8Array | string, encoding?: BufferEncoding, cb?: (err?: Error) => void): boolean;
/**
* Initiate a connection on a given socket.
*
* Possible signatures:
*
* * `socket.connect(options[, connectListener])`
* * `socket.connect(path[, connectListener])` for `IPC` connections.
* * `socket.connect(port[, host][, connectListener])` for TCP connections.
* * Returns: `net.Socket` The socket itself.
*
* This function is asynchronous. When the connection is established, the `'connect'` event will be emitted. If there is a problem connecting,
* instead of a `'connect'` event, an `'error'` event will be emitted with
* the error passed to the `'error'` listener.
* The last parameter `connectListener`, if supplied, will be added as a listener
* for the `'connect'` event **once**.
*
* This function should only be used for reconnecting a socket after`'close'` has been emitted or otherwise it may lead to undefined
* behavior.
*/
connect(options: SocketConnectOpts, connectionListener?: () => void): this;
connect(port: number, host: string, connectionListener?: () => void): this;
connect(port: number, connectionListener?: () => void): this;
connect(path: string, connectionListener?: () => void): this;
/**
* Set the encoding for the socket as a `Readable Stream`. See `readable.setEncoding()` for more information.
* @since v0.1.90
* @return The socket itself.
*/
setEncoding(encoding?: BufferEncoding): this;
/**
* Pauses the reading of data. That is, `'data'` events will not be emitted.
* Useful to throttle back an upload.
* @return The socket itself.
*/
pause(): this;
/**
* Close the TCP connection by sending an RST packet and destroy the stream.
* If this TCP socket is in connecting status, it will send an RST packet and destroy this TCP socket once it is connected.
* Otherwise, it will call `socket.destroy` with an `ERR_SOCKET_CLOSED` Error.
* If this is not a TCP socket (for example, a pipe), calling this method will immediately throw an `ERR_INVALID_HANDLE_TYPE` Error.
* @since v18.3.0, v16.17.0
*/
resetAndDestroy(): this;
/**
* Resumes reading after a call to `socket.pause()`.
* @return The socket itself.
*/
resume(): this;
/**
* Sets the socket to timeout after `timeout` milliseconds of inactivity on
* the socket. By default `net.Socket` do not have a timeout.
*
* When an idle timeout is triggered the socket will receive a `'timeout'` event but the connection will not be severed. The user must manually call `socket.end()` or `socket.destroy()` to
* end the connection.
*
* ```js
* socket.setTimeout(3000);
* socket.on('timeout', () => {
* console.log('socket timeout');
|
* socket.end();
* });
* ```
*
* If `timeout` is 0, then the existing idle timeout is disabled.
*
* The optional `callback` parameter will be added as a one-time listener for the `'timeout'` event.
* @since v0.1.90
* @return The socket itself.
*/
setTimeout(timeout: number, callback?: () => void): this;
/**
* Enable/disable the use of Nagle's algorithm.
*
* When a TCP connection is created, it will have Nagle's algorithm enabled.
*
* Nagle's algorithm delays data before it is sent via the network. It attempts
* to optimize throughput at the expense of latency.
*
* Passing `true` for `noDelay` or not passing an argument will disable Nagle's
* algorithm for the socket. Passing `false` for `noDelay` will enable Nagle's
* algorithm.
* @since v0.1.90
* @param [noDelay=true]
* @return The socket itself.
*/
setNoDelay(noDelay?: boolean): this;
/**
* Enable/disable keep-alive functionality, and optionally set the initial
* delay before the first keepalive probe is sent on an idle socket.
*
* Set `initialDelay` (in milliseconds) to set the delay between the last
* data packet received and the first keepalive probe. Setting `0` for`initialDelay` will leave the value unchanged from the default
* (or previous) setting.
*
* Enabling the keep-alive functionality will set the following socket options:
*
* * `SO_KEEPALIVE=1`
* * `TCP_KEEPIDLE=initialDelay`
* * `TCP_KEEPCNT=10`
* * `TCP_KEEPINTVL=1`
* @since v0.1.92
* @param [enable=false]
* @param [initialDelay=0]
* @return The socket itself.
*/
setKeepAlive(enable?: boolean, initialDelay?: number): this;
/**
* Returns the bound `address`, the address `family` name and `port` of the
* socket as reported by the operating system:`{ port: 12346, family: 'IPv4', address: '127.0.0.1' }`
* @since v0.1.90
*/
address(): AddressInfo | {};
/**
* Calling `unref()` on a socket will allow the program to exit if this is the only
* active socket in the event system. If the socket is already `unref`ed calling`unref()` again will have no effect.
* @since v0.9.1
* @return The socket itself.
*/
unref(): this;
/**
* Opposite of `unref()`, calling `ref()` on a previously `unref`ed socket will _not_ let the program exit if it's the only socket left (the default behavior).
* If the socket is `ref`ed calling `ref` again will have no effect.
* @since v0.9.1
* @return The socket itself.
*/
ref(): this;
/**
* This property is only present if the family autoselection algorithm is enabled in `socket.connect(options)`
* and it is an array of the addresses that have been attempted.
*
* Each address is a string in the form of `$IP:$PORT`.
* If the connection was successful, then the last address is the one that the socket is currently connected to.
* @since v19.4.0
*/
readonly autoSelectFamilyAttemptedAddresses: string[];
/**
* This property shows the number of characters buffered for writing. The buffer
* may contain strings whose length after encoding is not yet known. So this number
* is only an approximation of the number of bytes in the buffer.
*
* `net.Socket` has the property that `socket.write()` always works. This is to
* help users get up and running quickly. The computer cannot always keep up
* with the amount of data that is written to a socket. The network connection
* simply might |
be too slow. Node.js will internally queue up the data written to a
* socket and send it out over the wire when it is possible.
*
* The consequence of this internal buffering is that memory may grow.
* Users who experience large or growing `bufferSize` should attempt to
* "throttle" the data flows in their program with `socket.pause()` and `socket.resume()`.
* @since v0.3.8
* @deprecated Since v14.6.0 - Use `writableLength` instead.
*/
readonly bufferSize: number;
/**
* The amount of received bytes.
* @since v0.5.3
*/
readonly bytesRead: number;
/**
* The amount of bytes sent.
* @since v0.5.3
*/
readonly bytesWritten: number;
/**
* If `true`,`socket.connect(options[, connectListener])` was
* called and has not yet finished. It will stay `true` until the socket becomes
* connected, then it is set to `false` and the `'connect'` event is emitted. Note
* that the `socket.connect(options[, connectListener])` callback is a listener for the `'connect'` event.
* @since v6.1.0
*/
readonly connecting: boolean;
/**
* This is `true` if the socket is not connected yet, either because `.connect()`has not yet been called or because it is still in the process of connecting
* (see `socket.connecting`).
* @since v11.2.0, v10.16.0
*/
readonly pending: boolean;
/**
* See `writable.destroyed` for further details.
*/
readonly destroyed: boolean;
/**
* The string representation of the local IP address the remote client is
* connecting on. For example, in a server listening on `'0.0.0.0'`, if a client
* connects on `'192.168.1.1'`, the value of `socket.localAddress` would be`'192.168.1.1'`.
* @since v0.9.6
*/
readonly localAddress?: string;
/**
* The numeric representation of the local port. For example, `80` or `21`.
* @since v0.9.6
*/
readonly localPort?: number;
/**
* The string representation of the local IP family. `'IPv4'` or `'IPv6'`.
* @since v18.8.0, v16.18.0
*/
readonly localFamily?: string;
/**
* This property represents the state of the connection as a string.
*
* * If the stream is connecting `socket.readyState` is `opening`.
* * If the stream is readable and writable, it is `open`.
* * If the stream is readable and not writable, it is `readOnly`.
* * If the stream is not readable and writable, it is `writeOnly`.
* @since v0.5.0
*/
readonly readyState: SocketReadyState;
/**
* The string representation of the remote IP address. For example,`'74.125.127.100'` or `'2001:4860:a005::68'`. Value may be `undefined` if
* the socket is destroyed (for example, if the client disconnected).
* @since v0.5.10
*/
readonly remoteAddress?: string | undefined;
/**
* The string representation of the remote IP family. `'IPv4'` or `'IPv6'`. Value may be `undefined` if
* the socket is destroyed (for example, if the client disconnected).
* @since v0.11.14
*/
readonly remoteFamily?: string | undefined;
/**
* The numeric representation of the remote port. For example, `80` or `21`. Value may be `undefined` if
* the socket is destroyed (for example, if the client disconnected).
* @since v0.5.10
*/
readonly remotePort?: number | undefined;
/**
* The socket timeout in milliseconds as set by `socket.setTimeout()`.
* It is `undefined` if a timeout has not been set.
* @since v10.7.0
*/
readonly timeout?: number | unde |
fined;
/**
* Half-closes the socket. i.e., it sends a FIN packet. It is possible the
* server will still send some data.
*
* See `writable.end()` for further details.
* @since v0.1.90
* @param [encoding='utf8'] Only used when data is `string`.
* @param callback Optional callback for when the socket is finished.
* @return The socket itself.
*/
end(callback?: () => void): this;
end(buffer: Uint8Array | string, callback?: () => void): this;
end(str: Uint8Array | string, encoding?: BufferEncoding, callback?: () => void): this;
/**
* events.EventEmitter
* 1. close
* 2. connect
* 3. data
* 4. drain
* 5. end
* 6. error
* 7. lookup
* 8. ready
* 9. timeout
*/
addListener(event: string, listener: (...args: any[]) => void): this;
addListener(event: "close", listener: (hadError: boolean) => void): this;
addListener(event: "connect", listener: () => void): this;
addListener(event: "data", listener: (data: Buffer) => void): this;
addListener(event: "drain", listener: () => void): this;
addListener(event: "end", listener: () => void): this;
addListener(event: "error", listener: (err: Error) => void): this;
addListener(
event: "lookup",
listener: (err: Error, address: string, family: string | number, host: string) => void,
): this;
addListener(event: "ready", listener: () => void): this;
addListener(event: "timeout", listener: () => void): this;
emit(event: string | symbol, ...args: any[]): boolean;
emit(event: "close", hadError: boolean): boolean;
emit(event: "connect"): boolean;
emit(event: "data", data: Buffer): boolean;
emit(event: "drain"): boolean;
emit(event: "end"): boolean;
emit(event: "error", err: Error): boolean;
emit(event: "lookup", err: Error, address: string, family: string | number, host: string): boolean;
emit(event: "ready"): boolean;
emit(event: "timeout"): boolean;
on(event: string, listener: (...args: any[]) => void): this;
on(event: "close", listener: (hadError: boolean) => void): this;
on(event: "connect", listener: () => void): this;
on(event: "data", listener: (data: Buffer) => void): this;
on(event: "drain", listener: () => void): this;
on(event: "end", listener: () => void): this;
on(event: "error", listener: (err: Error) => void): this;
on(
event: "lookup",
listener: (err: Error, address: string, family: string | number, host: string) => void,
): this;
on(event: "ready", listener: () => void): this;
on(event: "timeout", listener: () => void): this;
once(event: string, listener: (...args: any[]) => void): this;
once(event: "close", listener: (hadError: boolean) => void): this;
once(event: "connect", listener: () => void): this;
once(event: "data", listener: (data: Buffer) => void): this;
once(event: "drain", listener: () => void): this;
once(event: "end", listener: () => void): this;
once(event: "error", listener: (err: Error) => void): this;
once(
event: "lookup",
listener: (err: Error, address: string, family: string | number, host: string) => void,
): this;
once(event: "ready", listener: () => void): this;
once(event: "timeout", listener: () => void): this;
prependListener(event: string, listener: (...args: any[]) => void): this;
prependListener(event: "close", listener: (hadError: boolean) => void): this;
prependListener(event: "connect", listener: () => void): this;
prependListener(event: "data", listener: (data: Buffer) => void): this;
|
prependListener(event: "drain", listener: () => void): this;
prependListener(event: "end", listener: () => void): this;
prependListener(event: "error", listener: (err: Error) => void): this;
prependListener(
event: "lookup",
listener: (err: Error, address: string, family: string | number, host: string) => void,
): this;
prependListener(event: "ready", listener: () => void): this;
prependListener(event: "timeout", listener: () => void): this;
prependOnceListener(event: string, listener: (...args: any[]) => void): this;
prependOnceListener(event: "close", listener: (hadError: boolean) => void): this;
prependOnceListener(event: "connect", listener: () => void): this;
prependOnceListener(event: "data", listener: (data: Buffer) => void): this;
prependOnceListener(event: "drain", listener: () => void): this;
prependOnceListener(event: "end", listener: () => void): this;
prependOnceListener(event: "error", listener: (err: Error) => void): this;
prependOnceListener(
event: "lookup",
listener: (err: Error, address: string, family: string | number, host: string) => void,
): this;
prependOnceListener(event: "ready", listener: () => void): this;
prependOnceListener(event: "timeout", listener: () => void): this;
}
interface ListenOptions extends Abortable {
port?: number | undefined;
host?: string | undefined;
backlog?: number | undefined;
path?: string | undefined;
exclusive?: boolean | undefined;
readableAll?: boolean | undefined;
writableAll?: boolean | undefined;
/**
* @default false
*/
ipv6Only?: boolean | undefined;
}
interface ServerOpts {
/**
* Indicates whether half-opened TCP connections are allowed.
* @default false
*/
allowHalfOpen?: boolean | undefined;
/**
* Indicates whether the socket should be paused on incoming connections.
* @default false
*/
pauseOnConnect?: boolean | undefined;
/**
* If set to `true`, it disables the use of Nagle's algorithm immediately after a new incoming connection is received.
* @default false
* @since v16.5.0
*/
noDelay?: boolean | undefined;
/**
* If set to `true`, it enables keep-alive functionality on the socket immediately after a new incoming connection is received,
* similarly on what is done in `socket.setKeepAlive([enable][, initialDelay])`.
* @default false
* @since v16.5.0
*/
keepAlive?: boolean | undefined;
/**
* If set to a positive number, it sets the initial delay before the first keepalive probe is sent on an idle socket.
* @default 0
* @since v16.5.0
*/
keepAliveInitialDelay?: number | undefined;
}
interface DropArgument {
localAddress?: string;
localPort?: number;
localFamily?: string;
remoteAddress?: string;
remotePort?: number;
remoteFamily?: string;
}
/**
* This class is used to create a TCP or `IPC` server.
* @since v0.1.90
*/
class Server extends EventEmitter {
constructor(connectionListener?: (socket: Socket) => void);
constructor(options?: ServerOpts, connectionListener?: (socket: Socket) => void);
/**
* Start a server listening for connections. A `net.Server` can be a TCP or
* an `IPC` server depending on what it listens to.
*
* Possible signatures:
*
* * `server.listen(handle[, backlog][, callback])`
* * `server.listen(options[, callback])`
* * `server.listen(path[, backlog][, callback])` for `IPC` servers
* * `server.listen([port[, host[, backlog]] |
][, callback])` for TCP servers
*
* This function is asynchronous. When the server starts listening, the `'listening'` event will be emitted. The last parameter `callback`will be added as a listener for the `'listening'`
* event.
*
* All `listen()` methods can take a `backlog` parameter to specify the maximum
* length of the queue of pending connections. The actual length will be determined
* by the OS through sysctl settings such as `tcp_max_syn_backlog` and `somaxconn`on Linux. The default value of this parameter is 511 (not 512).
*
* All {@link Socket} are set to `SO_REUSEADDR` (see [`socket(7)`](https://man7.org/linux/man-pages/man7/socket.7.html) for
* details).
*
* The `server.listen()` method can be called again if and only if there was an
* error during the first `server.listen()` call or `server.close()` has been
* called. Otherwise, an `ERR_SERVER_ALREADY_LISTEN` error will be thrown.
*
* One of the most common errors raised when listening is `EADDRINUSE`.
* This happens when another server is already listening on the requested`port`/`path`/`handle`. One way to handle this would be to retry
* after a certain amount of time:
*
* ```js
* server.on('error', (e) => {
* if (e.code === 'EADDRINUSE') {
* console.error('Address in use, retrying...');
* setTimeout(() => {
* server.close();
* server.listen(PORT, HOST);
* }, 1000);
* }
* });
* ```
*/
listen(port?: number, hostname?: string, backlog?: number, listeningListener?: () => void): this;
listen(port?: number, hostname?: string, listeningListener?: () => void): this;
listen(port?: number, backlog?: number, listeningListener?: () => void): this;
listen(port?: number, listeningListener?: () => void): this;
listen(path: string, backlog?: number, listeningListener?: () => void): this;
listen(path: string, listeningListener?: () => void): this;
listen(options: ListenOptions, listeningListener?: () => void): this;
listen(handle: any, backlog?: number, listeningListener?: () => void): this;
listen(handle: any, listeningListener?: () => void): this;
/**
* Stops the server from accepting new connections and keeps existing
* connections. This function is asynchronous, the server is finally closed
* when all connections are ended and the server emits a `'close'` event.
* The optional `callback` will be called once the `'close'` event occurs. Unlike
* that event, it will be called with an `Error` as its only argument if the server
* was not open when it was closed.
* @since v0.1.90
* @param callback Called when the server is closed.
*/
close(callback?: (err?: Error) => void): this;
/**
* Returns the bound `address`, the address `family` name, and `port` of the server
* as reported by the operating system if listening on an IP socket
* (useful to find which port was assigned when getting an OS-assigned address):`{ port: 12346, family: 'IPv4', address: '127.0.0.1' }`.
*
* For a server listening on a pipe or Unix domain socket, the name is returned
* as a string.
*
* ```js
* const server = net.createServer((socket) => {
* socket.end('goodbye\n');
* }).on('error', (err) => {
* // Handle errors here.
* throw err;
* });
*
* // Grab an arbitrary unused port.
* server.listen(() => {
* console.log('opened server on', server.address());
* });
* ```
*
* `server.address()` returns `null` before the `'listening'` even |
t has been
* emitted or after calling `server.close()`.
* @since v0.1.90
*/
address(): AddressInfo | string | null;
/**
* Asynchronously get the number of concurrent connections on the server. Works
* when sockets were sent to forks.
*
* Callback should take two arguments `err` and `count`.
* @since v0.9.7
*/
getConnections(cb: (error: Error | null, count: number) => void): void;
/**
* Opposite of `unref()`, calling `ref()` on a previously `unref`ed server will _not_ let the program exit if it's the only server left (the default behavior).
* If the server is `ref`ed calling `ref()` again will have no effect.
* @since v0.9.1
*/
ref(): this;
/**
* Calling `unref()` on a server will allow the program to exit if this is the only
* active server in the event system. If the server is already `unref`ed calling`unref()` again will have no effect.
* @since v0.9.1
*/
unref(): this;
/**
* Set this property to reject connections when the server's connection count gets
* high.
*
* It is not recommended to use this option once a socket has been sent to a child
* with `child_process.fork()`.
* @since v0.2.0
*/
maxConnections: number;
connections: number;
/**
* Indicates whether or not the server is listening for connections.
* @since v5.7.0
*/
readonly listening: boolean;
/**
* events.EventEmitter
* 1. close
* 2. connection
* 3. error
* 4. listening
* 5. drop
*/
addListener(event: string, listener: (...args: any[]) => void): this;
addListener(event: "close", listener: () => void): this;
addListener(event: "connection", listener: (socket: Socket) => void): this;
addListener(event: "error", listener: (err: Error) => void): this;
addListener(event: "listening", listener: () => void): this;
addListener(event: "drop", listener: (data?: DropArgument) => void): this;
emit(event: string | symbol, ...args: any[]): boolean;
emit(event: "close"): boolean;
emit(event: "connection", socket: Socket): boolean;
emit(event: "error", err: Error): boolean;
emit(event: "listening"): boolean;
emit(event: "drop", data?: DropArgument): boolean;
on(event: string, listener: (...args: any[]) => void): this;
on(event: "close", listener: () => void): this;
on(event: "connection", listener: (socket: Socket) => void): this;
on(event: "error", listener: (err: Error) => void): this;
on(event: "listening", listener: () => void): this;
on(event: "drop", listener: (data?: DropArgument) => void): this;
once(event: string, listener: (...args: any[]) => void): this;
once(event: "close", listener: () => void): this;
once(event: "connection", listener: (socket: Socket) => void): this;
once(event: "error", listener: (err: Error) => void): this;
once(event: "listening", listener: () => void): this;
once(event: "drop", listener: (data?: DropArgument) => void): this;
prependListener(event: string, listener: (...args: any[]) => void): this;
prependListener(event: "close", listener: () => void): this;
prependListener(event: "connection", listener: (socket: Socket) => void): this;
prependListener(event: "error", listener: (err: Error) => void): this;
prependListener(event: "listening", listener: () => void): this;
prependListener(event: "drop", listener: (data?: DropArgument) => void): this;
prependOnceListener(event: string, listener: (...args: any[]) => void): this;
prependOnceListener(event: "close", listener: () => void) |
: this;
prependOnceListener(event: "connection", listener: (socket: Socket) => void): this;
prependOnceListener(event: "error", listener: (err: Error) => void): this;
prependOnceListener(event: "listening", listener: () => void): this;
prependOnceListener(event: "drop", listener: (data?: DropArgument) => void): this;
/**
* Calls {@link Server.close()} and returns a promise that fulfills when the server has closed.
* @since v20.5.0
*/
[Symbol.asyncDispose](): Promise<void>;
}
type IPVersion = "ipv4" | "ipv6";
/**
* The `BlockList` object can be used with some network APIs to specify rules for
* disabling inbound or outbound access to specific IP addresses, IP ranges, or
* IP subnets.
* @since v15.0.0, v14.18.0
*/
class BlockList {
/**
* Adds a rule to block the given IP address.
* @since v15.0.0, v14.18.0
* @param address An IPv4 or IPv6 address.
* @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
*/
addAddress(address: string, type?: IPVersion): void;
addAddress(address: SocketAddress): void;
/**
* Adds a rule to block a range of IP addresses from `start` (inclusive) to`end` (inclusive).
* @since v15.0.0, v14.18.0
* @param start The starting IPv4 or IPv6 address in the range.
* @param end The ending IPv4 or IPv6 address in the range.
* @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
*/
addRange(start: string, end: string, type?: IPVersion): void;
addRange(start: SocketAddress, end: SocketAddress): void;
/**
* Adds a rule to block a range of IP addresses specified as a subnet mask.
* @since v15.0.0, v14.18.0
* @param net The network IPv4 or IPv6 address.
* @param prefix The number of CIDR prefix bits. For IPv4, this must be a value between `0` and `32`. For IPv6, this must be between `0` and `128`.
* @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
*/
addSubnet(net: SocketAddress, prefix: number): void;
addSubnet(net: string, prefix: number, type?: IPVersion): void;
/**
* Returns `true` if the given IP address matches any of the rules added to the`BlockList`.
*
* ```js
* const blockList = new net.BlockList();
* blockList.addAddress('123.123.123.123');
* blockList.addRange('10.0.0.1', '10.0.0.10');
* blockList.addSubnet('8592:757c:efae:4e45::', 64, 'ipv6');
*
* console.log(blockList.check('123.123.123.123')); // Prints: true
* console.log(blockList.check('10.0.0.3')); // Prints: true
* console.log(blockList.check('222.111.111.222')); // Prints: false
*
* // IPv6 notation for IPv4 addresses works:
* console.log(blockList.check('::ffff:7b7b:7b7b', 'ipv6')); // Prints: true
* console.log(blockList.check('::ffff:123.123.123.123', 'ipv6')); // Prints: true
* ```
* @since v15.0.0, v14.18.0
* @param address The IP address to check
* @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
*/
check(address: SocketAddress): boolean;
check(address: string, type?: IPVersion): boolean;
}
interface TcpNetConnectOpts extends TcpSocketConnectOpts, SocketConstructorOpts {
timeout?: number | undefined;
}
interface IpcNetConnectOpts extends IpcSocketConnectOpts, SocketConstructorOpts {
timeout?: number | undefined;
}
type NetConnectOpts = TcpNetConnectOpts | IpcNetConnectOpts;
/**
* Creates a new TCP or `IPC` server.
*
* If `allowHalfOpen` is set to `true`, when the other end of the socket
* signals the end of transmission, the server will only send back the end of
* transmission when `socket.end()` is explicitly called. For example, in the
|
* context of TCP, when a FIN packed is received, a FIN packed is sent
* back only when `socket.end()` is explicitly called. Until then the
* connection is half-closed (non-readable but still writable). See `'end'` event and [RFC 1122](https://tools.ietf.org/html/rfc1122) (section 4.2.2.13) for more information.
*
* If `pauseOnConnect` is set to `true`, then the socket associated with each
* incoming connection will be paused, and no data will be read from its handle.
* This allows connections to be passed between processes without any data being
* read by the original process. To begin reading data from a paused socket, call `socket.resume()`.
*
* The server can be a TCP server or an `IPC` server, depending on what it `listen()` to.
*
* Here is an example of a TCP echo server which listens for connections
* on port 8124:
*
* ```js
* const net = require('node:net');
* const server = net.createServer((c) => {
* // 'connection' listener.
* console.log('client connected');
* c.on('end', () => {
* console.log('client disconnected');
* });
* c.write('hello\r\n');
* c.pipe(c);
* });
* server.on('error', (err) => {
* throw err;
* });
* server.listen(8124, () => {
* console.log('server bound');
* });
* ```
*
* Test this by using `telnet`:
*
* ```bash
* telnet localhost 8124
* ```
*
* To listen on the socket `/tmp/echo.sock`:
*
* ```js
* server.listen('/tmp/echo.sock', () => {
* console.log('server bound');
* });
* ```
*
* Use `nc` to connect to a Unix domain socket server:
*
* ```bash
* nc -U /tmp/echo.sock
* ```
* @since v0.5.0
* @param connectionListener Automatically set as a listener for the {@link 'connection'} event.
*/
function createServer(connectionListener?: (socket: Socket) => void): Server;
function createServer(options?: ServerOpts, connectionListener?: (socket: Socket) => void): Server;
/**
* Aliases to {@link createConnection}.
*
* Possible signatures:
*
* * {@link connect}
* * {@link connect} for `IPC` connections.
* * {@link connect} for TCP connections.
*/
function connect(options: NetConnectOpts, connectionListener?: () => void): Socket;
function connect(port: number, host?: string, connectionListener?: () => void): Socket;
function connect(path: string, connectionListener?: () => void): Socket;
/**
* A factory function, which creates a new {@link Socket},
* immediately initiates connection with `socket.connect()`,
* then returns the `net.Socket` that starts the connection.
*
* When the connection is established, a `'connect'` event will be emitted
* on the returned socket. The last parameter `connectListener`, if supplied,
* will be added as a listener for the `'connect'` event **once**.
*
* Possible signatures:
*
* * {@link createConnection}
* * {@link createConnection} for `IPC` connections.
* * {@link createConnection} for TCP connections.
*
* The {@link connect} function is an alias to this function.
*/
function createConnection(options: NetConnectOpts, connectionListener?: () => void): Socket;
function createConnection(port: number, host?: string, connectionListener?: () => void): Socket;
function createConnection(path: string, connectionListener?: () => void): Socket;
/**
* Gets the current default value of the `autoSelectFamily` option of `socket.connect(options)`.
* The initial default value is `true`, unless the command line option`--no-network-family-autoselection` is provided.
* @since v19.4.0
*/
function getDefaultAutoSelectFamily(): boolean;
/**
* Sets the default value of the `autoSelectFamily` option of `socket.connect(o |