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.
5 // +build dragonfly freebsd linux netbsd openbsd
11 // fcntl64Syscall is usually SYS_FCNTL, but is overridden on 32-bit Linux
12 // systems by flock_linux_32bit.go to be SYS_FCNTL64.
13 var fcntl64Syscall uintptr = SYS_FCNTL
15 // FcntlInt performs a fcntl syscall on fd with the provided command and argument.
16 func FcntlInt(fd uintptr, cmd, arg int) (int, error) {
17 valptr, _, errno := Syscall(fcntl64Syscall, fd, uintptr(cmd), uintptr(arg))
22 return int(valptr), err
25 // FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command.
26 func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error {
27 _, _, errno := Syscall(fcntl64Syscall, fd, uintptr(cmd), uintptr(unsafe.Pointer(lk)))