42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
/* dirfd -- Return the file desciptor used by a DIR stream. Hurd version.
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Copyright (C) 1995 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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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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__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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return fd;
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}
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