closedir.c revision 1.11 
1/*	$NetBSD: closedir.c,v 1.11 2003/05/28 20:03:37 christos 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. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <sys/cdefs.h>
37#if defined(LIBC_SCCS) && !defined(lint)
38#if 0
39static char sccsid[] = "@(#)closedir.c	8.1 (Berkeley) 6/10/93";
40#else
41__RCSID("$NetBSD: closedir.c,v 1.11 2003/05/28 20:03:37 christos Exp $");
42#endif
43#endif /* LIBC_SCCS and not lint */
44
45#include "namespace.h"
46#include "reentrant.h"
47#include <sys/types.h>
48
49#include <assert.h>
50#include <dirent.h>
51#include <errno.h>
52#include <stdlib.h>
53#include <unistd.h>
54
55#ifdef __weak_alias
56__weak_alias(closedir,_closedir)
57#endif
58
59/*
60 * close a directory.
61 */
62int
63closedir(dirp)
64	DIR *dirp;
65{
66	int fd;
67
68	_DIAGASSERT(dirp != NULL);
69
70#ifdef _REENTRANT
71	if (__isthreaded)
72		mutex_lock((mutex_t *)dirp->dd_lock);
73#endif
74	__seekdir(dirp, dirp->dd_rewind);	/* free seekdir storage */
75	fd = dirp->dd_fd;
76	dirp->dd_fd = -1;
77	dirp->dd_loc = 0;
78	free((void *)dirp->dd_buf);
79	free((void *)dirp);
80#ifdef _REENTRANT
81	if (__isthreaded) {
82		mutex_unlock((mutex_t *)dirp->dd_lock);
83		mutex_destroy((mutex_t *)dirp->dd_lock);
84		free(dirp->dd_lock);
85	}
86#endif
87	return(close(fd));
88}
89