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 35 static 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 */ 61 int 62 closedir(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