1/* Linux openat syscall implementation, LFS.
2 Copyright (C) 2007-2021 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#ifdef __OFF_T_MATCHES_OFF64_T
25# define EXTRA_OPEN_FLAGS 0
26#else
27# define EXTRA_OPEN_FLAGS O_LARGEFILE
28#endif
29
30/* Open FILE with access OFLAG. Interpret relative paths relative to
31 the directory associated with FD. If OFLAG includes O_CREAT or
32 O_TMPFILE, a fourth argument is the file protection. */
33int
34__libc_openat64 (int fd, const char *file, int oflag, ...)
35{
36 mode_t mode = 0;
37 if (__OPEN_NEEDS_MODE (oflag))
38 {
39 va_list arg;
40 va_start (arg, oflag);
41 mode = va_arg (arg, mode_t);
42 va_end (arg);
43 }
44
45 return SYSCALL_CANCEL (openat, fd, file, oflag | EXTRA_OPEN_FLAGS, mode);
46}
47
48strong_alias (__libc_openat64, __openat64)
49libc_hidden_weak (__openat64)
50weak_alias (__libc_openat64, openat64)
51
52#ifdef __OFF_T_MATCHES_OFF64_T
53strong_alias (__libc_openat64, __openat)
54libc_hidden_weak (__openat)
55weak_alias (__libc_openat64, openat)
56#endif
57