1 /* $NetBSD: basename.c,v 1.9 2009/11/24 13:34:20 tnozaki Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 2002 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 and Jason R. Thorpe. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 __RCSID("$NetBSD: basename.c,v 1.9 2009/11/24 13:34:20 tnozaki Exp $"); 35 #endif /* !LIBC_SCCS && !lint */ 36 37 #include "namespace.h" 38 #include <libgen.h> 39 #include <limits.h> 40 #include <string.h> 41 42 #ifdef __weak_alias 43 __weak_alias(basename,_basename) 44 #endif 45 46 #if !HAVE_BASENAME 47 char * 48 basename(char *path) 49 { 50 static char result[PATH_MAX]; 51 const char *p, *lastp; 52 size_t len; 53 54 /* 55 * If `path' is a null pointer or points to an empty string, 56 * return a pointer to the string ".". 57 */ 58 if ((path == NULL) || (*path == '\0')) { 59 result[0] = '.'; 60 result[1] = '\0'; 61 62 return (result); 63 } 64 65 /* Strip trailing slashes, if any. */ 66 lastp = path + strlen(path) - 1; 67 while (lastp != path && *lastp == '/') 68 lastp--; 69 70 /* Now find the beginning of this (final) component. */ 71 p = lastp; 72 while (p != path && *(p - 1) != '/') 73 p--; 74 75 /* ...and copy the result into the result buffer. */ 76 len = (lastp - p) + 1 /* last char */; 77 if (len > (PATH_MAX - 1)) 78 len = PATH_MAX - 1; 79 80 memcpy(result, p, len); 81 result[len] = '\0'; 82 83 return (result); 84 } 85 #endif 86