Change:
<ins> From e4449f06a8989ff22947309151855b388c311aed Mon Sep 17 00:00:00 2001 From: Jared Baur <jaredbaur@fastmail.com> Date: Mon, 22 Jan 2024 20:42:48 -0800 Subject: [PATCH] Add dlopen discoverer --- internal/lookup/dlopen.go  | 57 ++++++++++++++++++++++++++++++++++++++ internal/lookup/library.go |  3 ++ 2 files changed, 60 insertions(+) create mode 100644 internal/lookup/dlopen.go diff --git a/internal/lookup/dlopen.go b/internal/lookup/dlopen.go new file mode 100644 index 00000000..7cd84522 --- /dev/null +++ b/internal/lookup/dlopen.go @@ -0,0 +1,57 @@ +package lookup + +// #cgo LDFLAGS: -ldl +// #define _GNU_SOURCE +// #include <dlfcn.h> +// #include <stdlib.h> +import "C" + +import ( +	"fmt" +	"path/filepath" +	"unsafe" +) + +// dlopenLocator can be used to locate libraries given a system's dynamic +// linker. +type dlopenLocator struct { +	file +} + +// NewDlopenLocator creats a locator that can be used for locating libraries +// through the dlopen mechanism. +func NewDlopenLocator(opts ...Option) Locator { +	f := newFileLocator(opts...) +	d := dlopenLocator{file: *f} +	return &d +} + +// Locate finds the specified pattern if the systems' dynamic linker can find +// it via dlopen. Note that patterns with wildcard patterns will likely not be +// found as it is uncommon for libraries to have wildcard patterns in their +// file name. +func (d dlopenLocator) Locate(pattern string) ([]string, error) { +	libname := C.CString(pattern) +	defer C.free(unsafe.Pointer(libname)) + +	d.logger.Debugf("Calling dlopen for %s", pattern) + +	handle := C.dlopen(libname, C.RTLD_LAZY) +	if handle == nil { +		return nil, fmt.Errorf("dlopen %s failed", pattern) +	} +	defer C.dlclose(handle) + +	libParentPath := C.CString("") + +	d.logger.Debugf("Calling dlinfo on handle for %s", pattern) +	ret := C.dlinfo(handle, C.RTLD_DI_ORIGIN, unsafe.Pointer(libParentPath)) +	if ret == -1 { +		return nil, fmt.Errorf("dlinfo on handle for %s failed", pattern) +	} + +	libAbsolutePath := filepath.Join(C.GoString(libParentPath), pattern) +	d.logger.Debugf("Found library for %s at %s", pattern, libAbsolutePath) + +	return []string{libAbsolutePath}, nil +} diff --git a/internal/lookup/library.go b/internal/lookup/library.go index 7f5cf7c8..916edde2 100644 --- a/internal/lookup/library.go +++ b/internal/lookup/library.go @@ -61,7 +61,10 @@ func NewLibraryLocator(opts ...Option) Locator { // We construct a symlink locator for expected library locations. symlinkLocator := NewSymlinkLocator(opts...) +	dlopenLocator := NewDlopenLocator(opts...) + l := First( +		dlopenLocator, symlinkLocator, newLdcacheLocator(opts...), ) -- </ins>

Discussion:
Project description The NVIDIA Container Toolkit CLI provides a number of utilities that are useful for working with the NVIDIA Container Toolkit. Metadata homepage URL: source URL: license: Apache License platforms: linux More Info Looks some of the related tools for the container runtime. Have already been included. But not . Add a :+1: [reaction] to [issues you find important]. [reaction]: [issues you find important]:

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As a workaround, I mount into the container explicitly.