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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* dirfd -- Return the file descriptor used by a DIR stream. Hurd version.
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Copyright (C) 1995-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <dirent.h>
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#include <dirstream.h>
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#include <hurd/fd.h>
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#include <errno.h>
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int
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__dirfd (DIR *dirp)
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{
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int fd;
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HURD_CRITICAL_BEGIN;
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__mutex_lock (&_hurd_dtable_lock);
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for (fd = 0; fd < _hurd_dtablesize; ++fd)
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if (_hurd_dtable[fd] == dirp->__fd)
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break;
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if (fd == _hurd_dtablesize)
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{
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errno = EINVAL;
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fd = -1;
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}
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__mutex_unlock (&_hurd_dtable_lock);
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HURD_CRITICAL_END;
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return fd;
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}
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weak_alias (__dirfd, dirfd)
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libc_hidden_def (dirfd)
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