1 /* $NetBSD: basename.c,v 1.16 2019/02/01 08:29:04 mrg 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
40 static char sccsid[] = "@(#)basename.c 8.4 (Berkeley) 5/4/95";
41 #endif
42 __RCSID("$NetBSD: basename.c,v 1.16 2019/02/01 08:29:04 mrg 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
55 int
main(int argc,char ** argv)56 main(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 != NULL) {
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
97 static void
usage(void)98 usage(void)
99 {
100
101 (void)fprintf(stderr, "usage: basename string [suffix]\n");
102 exit(1);
103 }
104