1// Copyright 2019 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
 5package unix
 6
 7import "unsafe"
 8
 9// FcntlInt performs a fcntl syscall on fd with the provided command and argument.
10func FcntlInt(fd uintptr, cmd, arg int) (int, error) {
11	return fcntl(int(fd), cmd, arg)
12}
13
14// FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command.
15func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error {
16	_, err := fcntl(int(fd), cmd, int(uintptr(unsafe.Pointer(lk))))
17	return err
18}
19
20// FcntlFstore performs a fcntl syscall for the F_PREALLOCATE command.
21func FcntlFstore(fd uintptr, cmd int, fstore *Fstore_t) error {
22	_, err := fcntl(int(fd), cmd, int(uintptr(unsafe.Pointer(fstore))))
23	return err
24}