1 /* $OpenBSD: readdir_r.c,v 1.3 2013/04/17 17:40:35 tedu Exp $ */ 2 /* 3 * Copyright (c) 1983, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/param.h> 32 #include <dirent.h> 33 #include <string.h> 34 #include <errno.h> 35 #include "telldir.h" 36 #include "thread_private.h" 37 38 int _readdir_unlocked(DIR *, struct dirent **, int); 39 40 int 41 readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result) 42 { 43 struct dirent *dp; 44 45 _MUTEX_LOCK(&dirp->dd_lock); 46 if (_readdir_unlocked(dirp, &dp, 1) != 0) { 47 _MUTEX_UNLOCK(&dirp->dd_lock); 48 return errno; 49 } 50 if (dp != NULL) 51 memcpy(entry, dp, 52 sizeof (struct dirent) - MAXNAMLEN + dp->d_namlen); 53 _MUTEX_UNLOCK(&dirp->dd_lock); 54 if (dp != NULL) 55 *result = entry; 56 else 57 *result = NULL; 58 return 0; 59 } 60