| // Copyright 2018 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 linux openbsd netbsd dragonfly |
| |
| package unix |
| |
| import ( |
| "syscall" |
| ) |
| |
| //extern unlinkat |
| func unlinkat(int32, *byte, int32) int32 |
| |
| //extern __go_openat |
| func openat(int32, *byte, int32, syscall.Mode_t) int32 |
| |
| func Unlinkat(dirfd int, path string, flags int) error { |
| var p *byte |
| p, err := syscall.BytePtrFromString(path) |
| if err != nil { |
| return err |
| } |
| |
| syscall.Entersyscall() |
| r := unlinkat(int32(dirfd), p, int32(flags)) |
| var errno syscall.Errno |
| if r < 0 { |
| errno = syscall.GetErrno() |
| } |
| syscall.Exitsyscall() |
| if r < 0 { |
| return errno |
| } |
| return nil |
| } |
| |
| func Openat(dirfd int, path string, flags int, perm uint32) (int, error) { |
| var p *byte |
| p, err := syscall.BytePtrFromString(path) |
| if err != nil { |
| return 0, err |
| } |
| |
| syscall.Entersyscall() |
| fd := openat(int32(dirfd), p, int32(flags), syscall.Mode_t(perm)) |
| var errno syscall.Errno |
| if fd < 0 { |
| errno = syscall.GetErrno() |
| } |
| syscall.Exitsyscall() |
| if fd < 0 { |
| return 0, errno |
| } |
| return int(fd), nil |
| } |
| |
| func Fstatat(dirfd int, path string, stat *syscall.Stat_t, flags int) error { |
| var p *byte |
| p, err := syscall.BytePtrFromString(path) |
| if err != nil { |
| return err |
| } |
| |
| syscall.Entersyscall() |
| r := fstatat(int32(dirfd), p, stat, int32(flags)) |
| var errno syscall.Errno |
| if r < 0 { |
| errno = syscall.GetErrno() |
| } |
| syscall.Exitsyscall() |
| if r < 0 { |
| return errno |
| } |
| |
| return nil |
| } |