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basename.c revision 1.3 
      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