1/*	$OpenBSD: readdir_r.c,v 1.6 2013/11/12 20:19:23 deraadt Exp $ */
2/*
3 * Copyright (c) 1983, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the University nor the names of its contributors
15 *    may be used to endorse or promote products derived from this software
16 *    without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <dirent.h>
32#include <errno.h>
33#include <limits.h>
34#include <string.h>
35#include "telldir.h"
36#include "thread_private.h"
37
38int
39readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result)
40{
41	struct dirent *dp;
42
43	_MUTEX_LOCK(&dirp->dd_lock);
44	if (_readdir_unlocked(dirp, &dp) != 0) {
45		_MUTEX_UNLOCK(&dirp->dd_lock);
46		return errno;
47	}
48	if (dp != NULL)
49		memcpy(entry, dp,
50		    sizeof (struct dirent) - NAME_MAX + dp->d_namlen);
51	_MUTEX_UNLOCK(&dirp->dd_lock);
52	if (dp != NULL)
53		*result = entry;
54	else
55		*result = NULL;
56	return 0;
57}
58