xref: /titanic_41/usr/src/lib/libc/port/gen/basename.c (revision 70025d765b044c6d8594bb965a2247a61e991a99)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 /*	Copyright (c) 1988 AT&T	*/
30 /*	  All Rights Reserved  	*/
31 
32 
33 /*
34  *	Return pointer to the last element of a pathname.
35  */
36 
37 #pragma weak basename = _basename
38 #include "synonyms.h"
39 #include <libgen.h>
40 #include <string.h>
41 #include <sys/types.h>
42 
43 
44 char *
45 basename(char *s)
46 {
47 	char	*p;
48 
49 	if (!s || !*s)			/* zero or empty argument */
50 		return (".");
51 
52 	p = s + strlen(s);
53 	while (p != s && *--p == '/')	/* skip trailing /s */
54 		*p = '\0';
55 
56 	if (p == s && *p == '\0')		/* all slashes */
57 		return ("/");
58 
59 	while (p != s)
60 		if (*--p == '/')
61 			return (++p);
62 
63 	return (p);
64 }
65