closedir.c revision 1.13 
1/*	$NetBSD: closedir.c,v 1.13 2003/08/07 16:42:46 agc Exp $	*/
2
3/*
4 * Copyright (c) 1983, 1993
5 *	Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#if defined(LIBC_SCCS) && !defined(lint)
34#if 0
35static char sccsid[] = "@(#)closedir.c	8.1 (Berkeley) 6/10/93";
36#else
37__RCSID("$NetBSD: closedir.c,v 1.13 2003/08/07 16:42:46 agc Exp $");
38#endif
39#endif /* LIBC_SCCS and not lint */
40
41#include "namespace.h"
42#include "reentrant.h"
43#include <sys/types.h>
44
45#include <assert.h>
46#include <dirent.h>
47#include <errno.h>
48#include <stdlib.h>
49#include <unistd.h>
50
51#ifdef __weak_alias
52__weak_alias(closedir,_closedir)
53#endif
54
55/*
56 * close a directory.
57 */
58int
59closedir(dirp)
60	DIR *dirp;
61{
62	int fd;
63
64	_DIAGASSERT(dirp != NULL);
65
66#ifdef _REENTRANT
67	if (__isthreaded)
68		mutex_lock((mutex_t *)dirp->dd_lock);
69#endif
70	__seekdir(dirp, dirp->dd_rewind);	/* free seekdir storage */
71	fd = dirp->dd_fd;
72	dirp->dd_fd = -1;
73	dirp->dd_loc = 0;
74	free((void *)dirp->dd_buf);
75#ifdef _REENTRANT
76	if (__isthreaded) {
77		mutex_unlock((mutex_t *)dirp->dd_lock);
78		mutex_destroy((mutex_t *)dirp->dd_lock);
79		free(dirp->dd_lock);
80	}
81#endif
82	free((void *)dirp);
83	return(close(fd));
84}
85