1/* Linux openat syscall implementation, non-LFS.
2 Copyright (C) 2005-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <fcntl.h>
20#include <stdarg.h>
21
22#include <sysdep-cancel.h>
23
24#ifndef __OFF_T_MATCHES_OFF64_T
25
26/* Open FILE with access OFLAG. Interpret relative paths relative to
27 the directory associated with FD. If OFLAG includes O_CREAT or
28 O_TMPFILE, a fourth argument is the file protection. */
29int
30__libc_openat (int fd, const char *file, int oflag, ...)
31{
32 mode_t mode = 0;
33 if (__OPEN_NEEDS_MODE (oflag))
34 {
35 va_list arg;
36 va_start (arg, oflag);
37 mode = va_arg (arg, mode_t);
38 va_end (arg);
39 }
40
41 return SYSCALL_CANCEL (openat, fd, file, oflag, mode);
42}
43weak_alias (__libc_openat, __openat)
44libc_hidden_weak (__openat)
45weak_alias (__libc_openat, openat)
46#endif
47

source code of glibc/sysdeps/unix/sysv/linux/openat.c