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      1 /*	$NetBSD: closedir.c,v 1.16 2010/09/26 02:26:59 yamt 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
     35 static char sccsid[] = "@(#)closedir.c	8.1 (Berkeley) 6/10/93";
     36 #else
     37 __RCSID("$NetBSD: closedir.c,v 1.16 2010/09/26 02:26:59 yamt 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  */
     61 int
     62 closedir(DIR *dirp)
     63 {
     64 	int fd;
     65 
     66 	_DIAGASSERT(dirp != NULL);
     67 
     68 #ifdef _REENTRANT
     69 	if (__isthreaded)
     70 		mutex_lock((mutex_t *)dirp->dd_lock);
     71 #endif
     72 	fd = dirp->dd_fd;
     73 	dirp->dd_fd = -1;
     74 	_finidir(dirp);
     75 
     76 #ifdef _REENTRANT
     77 	if (__isthreaded) {
     78 		mutex_unlock((mutex_t *)dirp->dd_lock);
     79 		mutex_destroy((mutex_t *)dirp->dd_lock);
     80 		free(dirp->dd_lock);
     81 	}
     82 #endif
     83 	free((void *)dirp);
     84 	return(close(fd));
     85 }
     86