1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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 <capsicum_helpers.h>
33 #include <err.h>
34 #include <libgen.h>
35 #include <limits.h>
36 #include <locale.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <unistd.h>
41 #include <wchar.h>
42
43 void stripsuffix(char *, const char *, size_t);
44 void usage(void);
45
46 int
main(int argc,char ** argv)47 main(int argc, char **argv)
48 {
49 char *p, *suffix;
50 size_t suffixlen;
51 int aflag, ch;
52
53 setlocale(LC_ALL, "");
54
55 if (caph_limit_stdio() < 0 || caph_enter() < 0)
56 err(1, "capsicum");
57
58 aflag = 0;
59 suffix = NULL;
60 suffixlen = 0;
61
62 while ((ch = getopt(argc, argv, "as:")) != -1)
63 switch(ch) {
64 case 'a':
65 aflag = 1;
66 break;
67 case 's':
68 suffix = optarg;
69 break;
70 case '?':
71 default:
72 usage();
73 }
74 argc -= optind;
75 argv += optind;
76
77 if (argc < 1)
78 usage();
79
80 if (!*argv[0]) {
81 printf("\n");
82 exit(0);
83 }
84 if ((p = basename(argv[0])) == NULL)
85 err(1, "%s", argv[0]);
86 if ((suffix == NULL && !aflag) && argc == 2) {
87 suffix = argv[1];
88 argc--;
89 }
90 if (suffix != NULL)
91 suffixlen = strlen(suffix);
92 while (argc--) {
93 if ((p = basename(*argv)) == NULL)
94 err(1, "%s", argv[0]);
95 stripsuffix(p, suffix, suffixlen);
96 argv++;
97 (void)printf("%s\n", p);
98 }
99 exit(0);
100 }
101
102 void
stripsuffix(char * p,const char * suffix,size_t suffixlen)103 stripsuffix(char *p, const char *suffix, size_t suffixlen)
104 {
105 char *q, *r;
106 mbstate_t mbs;
107 size_t n;
108
109 if (suffixlen && (q = strchr(p, '\0') - suffixlen) > p &&
110 strcmp(suffix, q) == 0) {
111 /* Ensure that the match occurred on a character boundary. */
112 memset(&mbs, 0, sizeof(mbs));
113 for (r = p; r < q; r += n) {
114 n = mbrlen(r, MB_LEN_MAX, &mbs);
115 if (n == (size_t)-1 || n == (size_t)-2) {
116 memset(&mbs, 0, sizeof(mbs));
117 n = 1;
118 }
119 }
120 /* Chop off the suffix. */
121 if (q == r)
122 *q = '\0';
123 }
124 }
125
126 void
usage(void)127 usage(void)
128 {
129
130 (void)fprintf(stderr,
131 "usage: basename string [suffix]\n"
132 " basename [-a] [-s suffix] string [...]\n");
133 exit(1);
134 }
135