1 /* $NetBSD: seekdir.c,v 1.11 2003/08/07 16:42:56 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The 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[] = "@(#)seekdir.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: seekdir.c,v 1.11 2003/08/07 16:42:56 agc Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include "reentrant.h" 43 #include <sys/param.h> 44 45 #include <dirent.h> 46 47 #ifdef __weak_alias 48 __weak_alias(seekdir,_seekdir) 49 #endif 50 51 /* 52 * Seek to an entry in a directory. 53 * __seekdir is in telldir.c so that it can share opaque data structures. 54 */ 55 void 56 seekdir(dirp, loc) 57 DIR *dirp; 58 long loc; 59 { 60 61 #ifdef _REENTRANT 62 if (__isthreaded) 63 mutex_lock((mutex_t *)dirp->dd_lock); 64 #endif 65 66 __seekdir(dirp, loc); 67 68 #ifdef _REENTRANT 69 if (__isthreaded) 70 mutex_unlock((mutex_t *)dirp->dd_lock); 71 #endif 72 } 73