1 /* $OpenBSD: basename.c,v 1.14 2016/10/28 07:22:59 schwarze Exp $ */
2 /* $NetBSD: basename.c,v 1.9 1995/09/02 05:29:46 jtc Exp $ */
3
4 /*-
5 * Copyright (c) 1991, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <err.h>
34 #include <libgen.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39
40 static void __dead usage(void);
41
42 int
main(int argc,char * argv[])43 main(int argc, char *argv[])
44 {
45 int ch;
46 char *p;
47
48 if (pledge("stdio", NULL) == -1)
49 err(1, "pledge");
50
51 while ((ch = getopt(argc, argv, "")) != -1) {
52 switch (ch) {
53 default:
54 usage();
55 }
56 }
57 argc -= optind;
58 argv += optind;
59
60 if (argc != 1 && argc != 2)
61 usage();
62
63 if (**argv == '\0') {
64 (void)puts("");
65 return 0;
66 }
67 p = basename(*argv);
68 if (p == NULL)
69 err(1, "%s", *argv);
70 /*
71 * If the suffix operand is present, is not identical to the
72 * characters remaining in string, and is identical to a suffix
73 * of the characters remaining in string, the suffix suffix
74 * shall be removed from string.
75 */
76 if (*++argv) {
77 size_t suffixlen, stringlen, off;
78
79 suffixlen = strlen(*argv);
80 stringlen = strlen(p);
81
82 if (suffixlen < stringlen) {
83 off = stringlen - suffixlen;
84 if (!strcmp(p + off, *argv))
85 p[off] = '\0';
86 }
87 }
88 (void)puts(p);
89 return 0;
90 }
91
92 extern char *__progname;
93
94 static void __dead
usage(void)95 usage(void)
96 {
97
98 (void)fprintf(stderr, "usage: %s string [suffix]\n", __progname);
99 exit(1);
100 }
101