rewinddir.c revision 1.11 
11.11Schristos/*	$NetBSD: rewinddir.c,v 1.11 2006/01/24 19:33:10 christos Exp $	*/
21.4Scgd
31.1Scgd/*-
41.2Sjtc * Copyright (c) 1990, 1993
51.2Sjtc *	The Regents of the University of California.  All rights reserved.
61.1Scgd *
71.1Scgd * Redistribution and use in source and binary forms, with or without
81.1Scgd * modification, are permitted provided that the following conditions
91.1Scgd * are met:
101.1Scgd * 1. Redistributions of source code must retain the above copyright
111.1Scgd *    notice, this list of conditions and the following disclaimer.
121.1Scgd * 2. Redistributions in binary form must reproduce the above copyright
131.1Scgd *    notice, this list of conditions and the following disclaimer in the
141.1Scgd *    documentation and/or other materials provided with the distribution.
151.10Sagc * 3. Neither the name of the University nor the names of its contributors
161.1Scgd *    may be used to endorse or promote products derived from this software
171.1Scgd *    without specific prior written permission.
181.1Scgd *
191.1Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
201.1Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
211.1Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
221.1Scgd * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
231.1Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
241.1Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
251.1Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
261.1Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
271.1Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
281.1Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
291.1Scgd * SUCH DAMAGE.
301.1Scgd */
311.1Scgd
321.5Schristos#include <sys/cdefs.h>
331.1Scgd#if defined(LIBC_SCCS) && !defined(lint)
341.4Scgd#if 0
351.4Scgdstatic char sccsid[] = "@(#)rewinddir.c	8.1 (Berkeley) 6/8/93";
361.4Scgd#else
371.11Schristos__RCSID("$NetBSD: rewinddir.c,v 1.11 2006/01/24 19:33:10 christos Exp $");
381.4Scgd#endif
391.1Scgd#endif /* LIBC_SCCS and not lint */
401.1Scgd
411.6Sjtc#include "namespace.h"
421.11Schristos#include "reentrant.h"
431.11Schristos#include "extern.h"
441.1Scgd#include <sys/types.h>
451.7Slukem
461.1Scgd#include <dirent.h>
471.6Sjtc
481.6Sjtc#ifdef __weak_alias
491.9Smycroft__weak_alias(rewinddir,_rewinddir)
501.6Sjtc#endif
511.1Scgd
521.1Scgdvoid
531.1Scgdrewinddir(dirp)
541.1Scgd	DIR *dirp;
551.1Scgd{
561.7Slukem
571.11Schristos#ifdef _REENTRANT
581.11Schristos	if (__isthreaded) {
591.11Schristos		mutex_lock((mutex_t *)dirp->dd_lock);
601.11Schristos		_seekdir_unlocked(dirp, dirp->dd_rewind);
611.11Schristos		dirp->dd_rewind = _telldir_unlocked(dirp);
621.11Schristos		mutex_unlock((mutex_t *)dirp->dd_lock);
631.11Schristos		return;
641.11Schristos	}
651.11Schristos#endif
661.11Schristos	_seekdir_unlocked(dirp, dirp->dd_rewind);
671.11Schristos	dirp->dd_rewind = _telldir_unlocked(dirp);
681.1Scgd
691.1Scgd}
70