| 1 | /* dirfd -- Return the file descriptor used by a DIR stream. Hurd version. |
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| 2 | Copyright (C) 1995-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <dirent.h> |
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| 20 | #include <dirstream.h> |
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| 21 | #include <hurd.h> |
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| 22 | #include <hurd/fd.h> |
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| 23 | #include <errno.h> |
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| 24 | |
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| 25 | int |
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| 26 | __dirfd (DIR *dirp) |
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| 27 | { |
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| 28 | int fd; |
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| 29 | |
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| 30 | HURD_CRITICAL_BEGIN; |
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| 31 | __mutex_lock (&_hurd_dtable_lock); |
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| 32 | for (fd = 0; fd < _hurd_dtablesize; ++fd) |
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| 33 | if (_hurd_dtable[fd] == dirp->__fd) |
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| 34 | break; |
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| 35 | if (fd == _hurd_dtablesize) |
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| 36 | fd = __hurd_fail (EINVAL); |
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| 37 | __mutex_unlock (&_hurd_dtable_lock); |
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| 38 | HURD_CRITICAL_END; |
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| 39 | |
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| 40 | return fd; |
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| 41 | } |
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| 42 | |
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| 43 | weak_alias (__dirfd, dirfd) |
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| 44 | libc_hidden_def (dirfd) |
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| 45 | |
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