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6d52618b | 1 | /* dirfd -- Return the file descriptor used by a DIR stream. Hurd version. |
04277e02 | 2 | Copyright (C) 1995-2019 Free Software Foundation, Inc. |
6d52618b | 3 | This file is part of the GNU C Library. |
22a1292a | 4 | |
6d52618b | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
22a1292a | 9 | |
6d52618b UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
22a1292a | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
22a1292a RM |
18 | |
19 | #include <dirent.h> | |
20 | #include <dirstream.h> | |
f0bf9cb9 RM |
21 | #include <hurd/fd.h> |
22 | #include <errno.h> | |
22a1292a RM |
23 | |
24 | int | |
2c7bbfaf | 25 | __dirfd (DIR *dirp) |
22a1292a RM |
26 | { |
27 | int fd; | |
802ca5a5 ST |
28 | |
29 | HURD_CRITICAL_BEGIN; | |
22a1292a RM |
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 | { | |
f0bf9cb9 | 36 | errno = EINVAL; |
22a1292a RM |
37 | fd = -1; |
38 | } | |
39 | __mutex_unlock (&_hurd_dtable_lock); | |
802ca5a5 | 40 | HURD_CRITICAL_END; |
22a1292a RM |
41 | |
42 | return fd; | |
43 | } | |
2c7bbfaf ST |
44 | |
45 | weak_alias (__dirfd, dirfd) | |
c120981d | 46 | libc_hidden_def (dirfd) |