text: // Copyright 2015 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // +build arm64,linux
  
  package unix
  
  import "unsafe"
  
  func EpollCreate(size int) (fd int, err error) {
  	if size <= 0 {
  		return -1, EINVAL
  	}
  	return EpollCreate1(0)
  }
  
  //sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT
  //sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
  //sys	Fchown(fd int, uid int, gid int) (err error)
  //sys	Fstat(fd int, stat *Stat_t) (err error)
  //sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
  //sys	Fstatfs(fd int, buf *Statfs_t) (err error)
  //sys	Ftruncate(fd int, length int64) (err error)
  //sysnb	Getegid() (egid int)
  //sysnb	Geteuid() (euid int)
  //sysnb	Getgid() (gid int)
  //sysnb	Getrlimit(resource int, rlim *Rlimit) (err error)
  //sysnb	Getuid() (uid int)
  //sys	Listen(s int, n int) (err error)
  //sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
  //sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
  //sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
  
  func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
  	var ts *Timespec
  	if timeout != nil {
  		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
  	}
  	return Pselect(nfd, r, w, e, ts, nil)
  }
  
  //sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
  //sys	Setfsgid(gid int) (err error)
  //sys	Setfsuid(uid int) (err error)
  //sysnb	Setregid(rgid int, egid int) (err error)
  //sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
  //sysnb	Setresuid(ruid int, euid int, suid int) (err error)
  //sysnb	Setrlimit(resource int, rlim *Rlimit) (err error)
  //sysnb	Setreuid(ruid int, euid int) (err error)
  //sys	Shutdown(fd int, how int) (err error)
  //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
  
  func Stat(path string, stat *Stat_t) (err error) {
  	return Fstatat(AT_FDCWD, path, stat, 0)
  }
  
  func Lchown(path string, uid int, gid int) (err error) {
  	return Fchownat(AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW)
  }
  
  func Lstat(path string, stat *Stat_t) (err error) {
  	return Fstatat(AT_FDCWD, path, stat, AT_SYMLINK_NOFOLLOW)
  }
  
  //sys	Statfs(path string, buf *Statfs_t) (err error)
  //sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
  //sys	Truncate(path string, length int64) (err error)
  
  func Ustat(dev int, ubuf *Ustat_t) (err error) {
  	return ENOSYS
  }
  
  //sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
  //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
  //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
  //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
  //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
  //sysnb	setgroups(n int, list *_Gid_t) (err error)
  //sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
  //sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
  //sysnb	socket(domain int, typ int, proto int) (fd int, err error)
  //sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
  //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
  //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
  //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
  //sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
  //sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
  //sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
  //sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
  
  //sysnb	Gettimeofday(tv *Timeval) (err error)
  
  func setTimespec(sec, nsec int64) Timespec {
  	return Timespec{Sec: sec, Nsec: nsec}
  }
  
  func setTimeval(sec, usec int64) Timeval {
  	return Timeval{Sec: sec, Usec: usec}
  }
  
  func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
  	if tv == nil {
  		return utimensat(dirfd, path, nil, 0)
  	}
  
  	ts := []Timespec{
  		NsecToTimespec(TimevalToNsec(tv[0])),
  		NsecToTimespec(TimevalToNsec(tv[1])),
  	}
  	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
  }
  
  func Time(t *Time_t) (Time_t, error) {
  	var tv Timeval
  	err := Gettimeofday(&tv)
  	if err != nil {
  		return 0, err
  	}
  	if t != nil {
  		*t = Time_t(tv.Sec)
  	}
  	return Time_t(tv.Sec), nil
  }
  
  func Utime(path string, buf *Utimbuf) error {
  	tv := []Timeval{
  		{Sec: buf.Actime},
  		{Sec: buf.Modtime},
  	}
  	return Utimes(path, tv)
  }
  
  func utimes(path string, tv *[2]Timeval) (err error) {
  	if tv == nil {
  		return utimensat(AT_FDCWD, path, nil, 0)
  	}
  
  	ts := []Timespec{
  		NsecToTimespec(TimevalToNsec(tv[0])),
  		NsecToTimespec(TimevalToNsec(tv[1])),
  	}
  	return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
  }
  
  func Pipe(p []int) (err error) {
  	if len(p) != 2 {
  		return EINVAL
  	}
  	var pp [2]_C_int
  	err = pipe2(&pp, 0)
  	p[0] = int(pp[0])
  	p[1] = int(pp[1])
  	return
  }
  
  //sysnb pipe2(p *[2]_C_int, flags int) (err error)
  
  func Pipe2(p []int, flags int) (err error) {
  	if len(p) != 2 {
  		return EINVAL
  	}
  	var pp [2]_C_int
  	err = pipe2(&pp, flags)
  	p[0] = int(pp[0])
  	p[1] = int(pp[1])
  	return
  }
  
  func (r *PtraceRegs) PC() uint64 { return r.Pc }
  
  func (r *PtraceRegs) SetPC(pc uint64) { r.Pc = pc }
  
  func (iov *Iovec) SetLen(length int) {
  	iov.Len = uint64(length)
  }
  
  func (msghdr *Msghdr) SetControllen(length int) {
  	msghdr.Controllen = uint64(length)
  }
  
  func (cmsg *Cmsghdr) SetLen(length int) {
  	cmsg.Len = uint64(length)
  }
  
  func InotifyInit() (fd int, err error) {
  	return InotifyInit1(0)
  }
  
  func Dup2(oldfd int, newfd int) (err error) {
  	return Dup3(oldfd, newfd, 0)
  }
  
  func Pause() (err error) {
  	_, _, e1 := Syscall6(SYS_PPOLL, 0, 0, 0, 0, 0, 0)
  	if e1 != 0 {
  		err = errnoErr(e1)
  	}
  	return
  }
  
  func Poll(fds []PollFd, timeout int) (n int, err error) {
  	var ts *Timespec
  	if timeout >= 0 {
  		ts = new(Timespec)
  		*ts = NsecToTimespec(int64(timeout) * 1e6)
  	}
  	if len(fds) == 0 {
  		return ppoll(nil, 0, ts, nil)
  	}
  	return ppoll(&fds[0], len(fds), ts, nil)
  }
  