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 <stddef.h> |
21 | #include <unistd.h> |
22 | |
23 | |
24 | /* Make a link to FROM relative to FROMFD called TO relative to TOFD. */ |
25 | int |
26 | linkat (int fromfd, const char *from, int tofd, const char *to, int flags) |
27 | { |
28 | if (from == NULL || to == NULL) |
29 | { |
30 | __set_errno (EINVAL); |
31 | return -1; |
32 | } |
33 | |
34 | if ((tofd != AT_FDCWD && tofd < 0 && *to != '/') |
35 | || (fromfd != AT_FDCWD && fromfd < 0 && *from != '/')) |
36 | { |
37 | __set_errno (EBADF); |
38 | return -1; |
39 | } |
40 | |
41 | __set_errno (ENOSYS); |
42 | return -1; |
43 | } |
44 | stub_warning (linkat) |
45 | |