basename.c revision 102084 
1/*-
2 * Copyright (c) 1991, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1991, 1993, 1994\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif
39
40#if 0
41#ifndef lint
42static char sccsid[] = "@(#)basename.c	8.4 (Berkeley) 5/4/95";
43#endif /* not lint */
44#endif
45
46#include <sys/cdefs.h>
47__FBSDID("$FreeBSD: head/usr.bin/basename/basename.c 102084 2002-08-19 03:07:56Z jmallett $");
48
49#include <err.h>
50#include <libgen.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <unistd.h>
55
56void usage(void);
57
58int
59main(argc, argv)
60	int argc;
61	char **argv;
62{
63	char *p, *q, *suffix;
64	size_t suffixlen;
65	int aflag, ch;
66
67	aflag = 0;
68	suffix = NULL;
69	suffixlen = 0;
70
71	while ((ch = getopt(argc, argv, "as:")) != -1)
72		switch(ch) {
73		case 'a':
74			aflag = 1;
75			break;
76		case 's':
77			suffix = optarg;
78			break;
79		case '?':
80		default:
81			usage();
82		}
83	argc -= optind;
84	argv += optind;
85
86	if (argc < 1)
87		usage();
88
89	if (!*argv[0]) {
90		printf("\n");
91		exit(0);
92	}
93	if ((p = basename(argv[0])) == NULL)
94		err(1, "%s", argv[0]);
95	if ((suffix == NULL && !aflag) && argc == 2) {
96		suffix = argv[1];
97		argc--;
98	}
99	if (suffix != NULL)
100		suffixlen = strlen(suffix);
101	while (argc--) {
102		if ((p = basename(*argv)) == NULL)
103			err(1, "%s", argv[0]);
104		if (suffixlen && (q = strchr(p, '\0') - suffixlen) > p &&
105		    strcmp(suffix, q) == 0)
106			*q = '\0';
107		argv++;
108		(void)printf("%s\n", p);
109	}
110	exit(0);
111}
112
113void
114usage()
115{
116
117	(void)fprintf(stderr,
118"usage: basename string [suffix]\n"
119"       basename [-a] [-s suffix] string [...]\n");
120	exit(1);
121}
122