1 /* Copyright (C) 2005-2021 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 #include <stdarg.h>
21 #include <stddef.h>
22 #include <stdio.h>
23 #include <sys/stat.h>
24
25 /* Open FILE with access OFLAG. Interpret relative paths relative to
26 the directory associated with FD. If O_CREAT or O_TMPFILE is in OFLAG, a
27 third argument is the file protection. */
28 int
__openat64(int fd,const char * file,int oflag,...)29 __openat64 (int fd, const char *file, int oflag, ...)
30 {
31 int mode;
32
33 if (file == NULL)
34 {
35 __set_errno (EINVAL);
36 return -1;
37 }
38
39 if (fd != AT_FDCWD && file[0] != '/')
40 {
41 /* Check FD is associated with a directory. */
42 struct stat64 st;
43 if (__fstat64 (fd, &st) != 0)
44 return -1;
45
46 if (!S_ISDIR (st.st_mode))
47 {
48 __set_errno (ENOTDIR);
49 return -1;
50 }
51 }
52
53 if (__OPEN_NEEDS_MODE (oflag))
54 {
55 va_list arg;
56 va_start (arg, oflag);
57 mode = va_arg (arg, int);
58 va_end (arg);
59
60 ignore_value (mode);
61 }
62
63 __set_errno (ENOSYS);
64 return -1;
65 }
66 libc_hidden_def (__openat64)
67 weak_alias (__openat64, openat64)
68 stub_warning (openat64)
69
70 /* __openat64_2 is a generic wrapper that calls __openat64.
71 So give a stub warning for that symbol too. */
72 stub_warning (__openat_2)
73