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// Copyright 2009 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 hurd linux
// glibc library calls.
package syscall
import (
//sys Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error)
//__go_openat(dirfd _C_int, path *byte, flags _C_int, mode Mode_t) _C_int
//sys futimesat(dirfd int, path *byte, times *[2]Timeval) (err error)
//futimesat(dirfd _C_int, path *byte, times *[2]Timeval) _C_int
func Futimesat(dirfd int, path string, tv []Timeval) (err error) {
if len(tv) != 2 {
return EINVAL
return futimesat(dirfd, StringBytePtr(path), (*[2]Timeval)(unsafe.Pointer(&tv[0])))
func Futimes(fd int, tv []Timeval) (err error) {
// Believe it or not, this is the best we can do on GNU/Linux
// (and is what glibc does).
return Utimes("/proc/self/fd/"+itoa(fd), tv)
//sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error)
//__go_ptrace(request _C_int, pid Pid_t, addr *byte, data *byte) _C_long
//sys accept4(fd int, sa *RawSockaddrAny, len *Socklen_t, flags int) (nfd int, err error)
//accept4(fd _C_int, sa *RawSockaddrAny, len *Socklen_t, flags _C_int) _C_int
func Accept4(fd int, flags int) (nfd int, sa Sockaddr, err error) {
var rsa RawSockaddrAny
var len Socklen_t = SizeofSockaddrAny
nfd, err = accept4(fd, &rsa, &len, flags)
if err != nil {
return -1, nil, err
sa, err = anyToSockaddr(&rsa)
if err != nil {
return -1, nil, err
return nfd, sa, nil
//sysnb Dup3(oldfd int, newfd int, flags int) (err error)
//dup3(oldfd _C_int, newfd _C_int, flags _C_int) _C_int
//sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
//faccessat(dirfd _C_int, pathname *byte, mode _C_int, flags _C_int) _C_int
//sys Fallocate(fd int, mode uint32, off int64, len int64) (err error)
//fallocate(fd _C_int, mode _C_int, offset Offset_t, len Offset_t) _C_int
//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
//fchmodat(dirfd _C_int, pathname *byte, mode Mode_t, flags _C_int) _C_int
//sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
//fchownat(dirfd _C_int, path *byte, owner Uid_t, group Gid_t, flags _C_int) _C_int
//sys Flock(fd int, how int) (err error)
//flock(fd _C_int, how _C_int) _C_int
func Getdents(fd int, buf []byte) (n int, err error) {
var p *byte
if len(buf) > 0 {
p = &buf[0]
} else {
p = (*byte)(unsafe.Pointer(&_zero))
if s == 0 {
r1, _, errno := Syscall(uintptr(s), uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(len(buf)))
n = int(r1)
if n < 0 {
err = errno
func ReadDirent(fd int, buf []byte) (n int, err error) {
return Getdents(fd, buf)
//sys Mkdirat(dirfd int, path string, mode uint32) (err error)
//mkdirat(dirfd _C_int, path *byte, mode Mode_t) _C_int
//sys Mknodat(dirfd int, path string, mode uint32, dev int) (err error)
//mknodat(dirfd _C_int, path *byte, mode Mode_t, dev _dev_t) _C_int
//sysnb pipe2(p *[2]_C_int, flags int) (err error)
//pipe2(p *[2]_C_int, flags _C_int) _C_int
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])
//sys sendfile(outfd int, infd int, offset *Offset_t, count int) (written int, err error)
//sendfile64(outfd _C_int, infd _C_int, offset *Offset_t, count Size_t) Ssize_t
func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
if race.Enabled {
var soff Offset_t
var psoff *Offset_t
if offset != nil {
soff = Offset_t(*offset)
psoff = &soff
written, err = sendfile(outfd, infd, psoff, count)
if offset != nil {
*offset = int64(soff)
//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
//sync_file_range(fd _C_int, off Offset_t, n Offset_t, flags _C_uint) _C_int