1/* Copyright (C) 1991-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <fcntl.h>
20
21/* Perform file control operations on FD. */
22int
23__fcntl (int fd, int cmd, ...)
24{
25 if (fd < 0)
26 {
27 __set_errno (EBADF);
28 return -1;
29 }
30
31 __set_errno (ENOSYS);
32 return -1;
33}
34libc_hidden_def (__fcntl)
35stub_warning (fcntl)
36
37weak_alias (__fcntl, fcntl)
38

source code of glibc/io/fcntl.c