1 /* $NetBSD: basename.c,v 1.3 2002/01/21 21:33:42 tv Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Klaus Klein. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #if HAVE_CONFIG_H 40 #include "config.h" 41 #else 42 #include <sys/cdefs.h> 43 #if defined(LIBC_SCCS) && !defined(lint) 44 __RCSID("$NetBSD: basename.c,v 1.3 2002/01/21 21:33:42 tv Exp $"); 45 #endif /* !LIBC_SCCS && !lint */ 46 47 #include "namespace.h" 48 #include <libgen.h> 49 50 #ifdef __weak_alias 51 __weak_alias(basename,_basename) 52 #endif 53 #endif 54 55 #include <string.h> 56 57 #if !HAVE_BASENAME 58 char * 59 basename(path) 60 char *path; 61 { 62 static char singledot[] = "."; 63 char *p; 64 65 /* 66 * If `path' is a null pointer or points to an empty string, 67 * return a pointer to the string ".". 68 */ 69 if ((path == NULL) || (*path == '\0')) 70 return (singledot); 71 72 /* Strip trailing slashes, if any. */ 73 p = path + strlen(path) - 1; 74 while (*p == '/' && p != path) 75 *p-- = '\0'; 76 77 /* Return pointer to the final pathname component. */ 78 if (((p = strrchr(path, '/')) == NULL) || (*(p + 1) == '\0')) 79 return (path); 80 else 81 return (p + 1); 82 } 83 #endif 84