closedir.c revision 1.15 
1/*	$NetBSD: closedir.c,v 1.15 2006/05/17 20:36:50 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. 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 1.15 2006/05/17 20:36:50 christos Exp $");
38#endif
39#endif /* LIBC_SCCS and not lint */
40
41#include "namespace.h"
42#include "reentrant.h"
43#include "extern.h"
44#include <sys/types.h>
45
46#include <assert.h>
47#include <dirent.h>
48#include <errno.h>
49#include <stdlib.h>
50#include <unistd.h>
51
52#include "dirent_private.h"
53
54#ifdef __weak_alias
55__weak_alias(closedir,_closedir)
56#endif
57
58/*
59 * close a directory.
60 */
61int
62closedir(DIR *dirp)
63{
64	int fd;
65	struct dirpos *poslist;
66
67	_DIAGASSERT(dirp != NULL);
68
69#ifdef _REENTRANT
70	if (__isthreaded)
71		mutex_lock((mutex_t *)dirp->dd_lock);
72#endif
73	fd = dirp->dd_fd;
74	dirp->dd_fd = -1;
75	dirp->dd_loc = 0;
76	free(dirp->dd_buf);
77
78	/* free seekdir/telldir storage */
79	for (poslist = dirp->dd_internal; poslist; ) {
80		struct dirpos *nextpos = poslist->dp_next;
81		free(poslist);
82		poslist = nextpos;
83	}
84
85#ifdef _REENTRANT
86	if (__isthreaded) {
87		mutex_unlock((mutex_t *)dirp->dd_lock);
88		mutex_destroy((mutex_t *)dirp->dd_lock);
89		free(dirp->dd_lock);
90	}
91#endif
92	free((void *)dirp);
93	return(close(fd));
94}
95