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comparison vendor/golang.org/x/sys/unix/fcntl.go @ 66:787b5ee0289d draft

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Use vendored modules Signed-off-by: Izuru Yakumo <yakumo.izuru@chaotic.ninja>
author yakumo.izuru
date Sun, 23 Jul 2023 13:18:53 +0000
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65:6d985efa0f7a 66:787b5ee0289d
1 // Copyright 2014 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4
5 //go:build dragonfly || freebsd || linux || netbsd || openbsd
6 // +build dragonfly freebsd linux netbsd openbsd
7
8 package unix
9
10 import "unsafe"
11
12 // fcntl64Syscall is usually SYS_FCNTL, but is overridden on 32-bit Linux
13 // systems by fcntl_linux_32bit.go to be SYS_FCNTL64.
14 var fcntl64Syscall uintptr = SYS_FCNTL
15
16 func fcntl(fd int, cmd, arg int) (int, error) {
17 valptr, _, errno := Syscall(fcntl64Syscall, uintptr(fd), uintptr(cmd), uintptr(arg))
18 var err error
19 if errno != 0 {
20 err = errno
21 }
22 return int(valptr), err
23 }
24
25 // FcntlInt performs a fcntl syscall on fd with the provided command and argument.
26 func FcntlInt(fd uintptr, cmd, arg int) (int, error) {
27 return fcntl(int(fd), cmd, arg)
28 }
29
30 // FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command.
31 func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error {
32 _, _, errno := Syscall(fcntl64Syscall, fd, uintptr(cmd), uintptr(unsafe.Pointer(lk)))
33 if errno == 0 {
34 return nil
35 }
36 return errno
37 }