1 // +build linux darwin freebsd openbsd netbsd dragonfly 2 3 // Copyright 2014 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 package syscall 8 9 import "unsafe" 10 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 14 15 // FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command. 16 func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error { 17 _, _, errno := Syscall(fcntl64Syscall, fd, uintptr(cmd), uintptr(unsafe.Pointer(lk))) 18 if errno == 0 { 19 return nil 20 } 21 return errno 22 } 23
