1/*	$NetBSD: basename.c,v 1.14 2008/07/21 14:19:21 lukem Exp $	*/
2
3/*-
4 * Copyright (c) 1991, 1993, 1994
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#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1991, 1993, 1994\
35 The Regents of the University of California.  All rights reserved.");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)basename.c	8.4 (Berkeley) 5/4/95";
41#endif
42__RCSID("$NetBSD: basename.c,v 1.14 2008/07/21 14:19:21 lukem Exp $");
43#endif /* not lint */
44
45#include <err.h>
46#include <libgen.h>
47#include <locale.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <string.h>
51#include <unistd.h>
52
53__dead static void usage(void);
54
55int
56main(int argc, char **argv)
57{
58	char *p;
59	int ch;
60
61	setlocale(LC_ALL, "");
62
63	while ((ch = getopt(argc, argv, "")) != -1)
64		switch (ch) {
65		case '?':
66		default:
67			usage();
68		}
69	argc -= optind;
70	argv += optind;
71
72	if (argc != 1 && argc != 2)
73		usage();
74
75	if (**argv == '\0') {
76		(void)printf("\n");
77		exit(0);
78	}
79	if ((p = basename(*argv)) == NULL)
80		err(1, "%s", *argv);
81	if (*++argv != '\0') {
82		int suffixlen, stringlen, off;
83
84		suffixlen = strlen(*argv);
85		stringlen = strlen(p);
86
87		if (suffixlen < stringlen) {
88			off = stringlen - suffixlen;
89			if (strcmp(p + off, *argv) == 0)
90				p[off] = '\0';
91		}
92	}
93	(void)printf("%s\n", p);
94	exit(0);
95}
96
97static void
98usage(void)
99{
100
101	(void)fprintf(stderr, "usage: basename string [suffix]\n");
102	exit(1);
103}
104