1 | /* Copyright (C) 2005-2022 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 | #include <stdarg.h> |
21 | #include <stddef.h> |
22 | #include <stdio.h> |
23 | #include <sys/stat.h> |
24 | #include <kernel-features.h> |
25 | |
26 | |
27 | /* Open FILE with access OFLAG. Interpret relative paths relative to |
28 | the directory associated with FD. If O_CREAT or O_TMPFILE is in OFLAG, a |
29 | third argument is the file protection. */ |
30 | int |
31 | __openat (int fd, const char *file, int oflag, ...) |
32 | { |
33 | int mode; |
34 | |
35 | if (file == NULL) |
36 | { |
37 | __set_errno (EINVAL); |
38 | return -1; |
39 | } |
40 | |
41 | if (fd != AT_FDCWD && file[0] != '/') |
42 | { |
43 | /* Check FD is associated with a directory. */ |
44 | struct stat64 st; |
45 | if (__fstat64 (fd, &st) != 0) |
46 | return -1; |
47 | |
48 | if (!S_ISDIR (st.st_mode)) |
49 | { |
50 | __set_errno (ENOTDIR); |
51 | return -1; |
52 | } |
53 | } |
54 | |
55 | if (__OPEN_NEEDS_MODE (oflag)) |
56 | { |
57 | va_list arg; |
58 | va_start (arg, oflag); |
59 | mode = va_arg (arg, int); |
60 | va_end (arg); |
61 | |
62 | ignore_value (mode); |
63 | } |
64 | |
65 | __set_errno (ENOSYS); |
66 | return -1; |
67 | } |
68 | libc_hidden_def (__openat) |
69 | weak_alias (__openat, openat) |
70 | stub_warning (openat) |
71 | |
72 | /* __openat_2 is a generic wrapper that calls __openat. |
73 | So give a stub warning for that symbol too. */ |
74 | stub_warning (__openat_2) |
75 | |