1 | /* dirfd -- Return the file descriptor used by a DIR stream. Hurd version. |
2 | Copyright (C) 1995-2022 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 <dirent.h> |
20 | #include <dirstream.h> |
21 | #include <hurd/fd.h> |
22 | #include <errno.h> |
23 | |
24 | int |
25 | __dirfd (DIR *dirp) |
26 | { |
27 | int fd; |
28 | |
29 | HURD_CRITICAL_BEGIN; |
30 | __mutex_lock (&_hurd_dtable_lock); |
31 | for (fd = 0; fd < _hurd_dtablesize; ++fd) |
32 | if (_hurd_dtable[fd] == dirp->__fd) |
33 | break; |
34 | if (fd == _hurd_dtablesize) |
35 | { |
36 | errno = EINVAL; |
37 | fd = -1; |
38 | } |
39 | __mutex_unlock (&_hurd_dtable_lock); |
40 | HURD_CRITICAL_END; |
41 | |
42 | return fd; |
43 | } |
44 | |
45 | weak_alias (__dirfd, dirfd) |
46 | libc_hidden_def (dirfd) |
47 | |