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dff8da6b | 1 | /* Copyright (C) 2005-2024 Free Software Foundation, Inc. |
5c46041a UD |
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 | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
5c46041a UD |
17 | |
18 | #include <errno.h> | |
19 | #include <fcntl.h> | |
20 | #include <unistd.h> | |
21 | ||
22 | /* Read the contents of the symbolic link PATH relative to FD into no | |
23 | more than LEN bytes of BUF. The contents are not null-terminated. | |
24 | Returns the number of characters read, or -1 for errors. */ | |
6d893bd9 | 25 | ssize_t |
9d46370c | 26 | readlinkat (int fd, const char *path, char *buf, size_t len) |
5c46041a UD |
27 | { |
28 | if (path == NULL) | |
29 | { | |
30 | __set_errno (EINVAL); | |
31 | return -1; | |
32 | } | |
33 | ||
34 | if (fd != AT_FDCWD && fd < 0 && *path != '/') | |
35 | { | |
36 | __set_errno (EBADF); | |
37 | return -1; | |
38 | } | |
39 | ||
40 | __set_errno (ENOSYS); | |
41 | return -1; | |
42 | } | |
43 | stub_warning (readlinkat) | |
a346370d | 44 | libc_hidden_def (readlinkat) |