- Document ttyname_r().
[dragonfly.git] / lib / libc / gen / seekdir.c
CommitLineData
984263bc
MD
1/*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD: src/lib/libc/gen/seekdir.c,v 1.2.8.1 2001/03/05 09:52:13 obrien Exp $
b0e25abd 34 * $DragonFly: src/lib/libc/gen/seekdir.c,v 1.6 2005/11/19 22:32:53 swildner Exp $
1de703da
MD
35 *
36 * @(#)seekdir.c 8.1 (Berkeley) 6/4/93
984263bc
MD
37 */
38
17ea2221 39#include "namespace.h"
984263bc
MD
40#include <sys/param.h>
41#include <dirent.h>
17ea2221
MD
42#include <pthread.h>
43#include "un-namespace.h"
44
45#include "libc_private.h"
984263bc 46
984263bc
MD
47/*
48 * Seek to an entry in a directory.
49 * _seekdir is in telldir.c so that it can share opaque data structures.
50 */
51void
0f52d283 52seekdir(DIR *dirp, long loc)
984263bc 53{
17ea2221
MD
54 if (__isthreaded)
55 _pthread_mutex_lock((pthread_mutex_t *)&dirp->dd_lock);
56 _seekdir(dirp, loc);
57 if (__isthreaded)
58 _pthread_mutex_unlock((pthread_mutex_t *)&dirp->dd_lock);
984263bc 59}