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 #ifndef lint
33 static const char copyright[] =
34 "@(#) Copyright (c) 1991, 1993, 1994\n\
35 The Regents of the University of California. All rights reserved.\n";
36 #endif
37
38 #if 0
39 #ifndef lint
40 static char sccsid[] = "@(#)basename.c 8.4 (Berkeley) 5/4/95";
41 #endif /* not lint */
42 #endif
43
44 #include <sys/cdefs.h>
45 #include <capsicum_helpers.h>
46 #include <err.h>
47 #include <libgen.h>
48 #include <limits.h>
49 #include <locale.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <unistd.h>
54 #include <wchar.h>
55
56 void stripsuffix(char *, const char *, size_t);
57 void usage(void);
58
59 int
main(int argc,char ** argv)60 main(int argc, char **argv)
61 {
62 char *p, *suffix;
63 size_t suffixlen;
64 int aflag, ch;
65
66 setlocale(LC_ALL, "");
67
68 if (caph_limit_stdio() < 0 || caph_enter() < 0)
69 err(1, "capsicum");
70
71 aflag = 0;
72 suffix = NULL;
73 suffixlen = 0;
74
75 while ((ch = getopt(argc, argv, "as:")) != -1)
76 switch(ch) {
77 case 'a':
78 aflag = 1;
79 break;
80 case 's':
81 suffix = optarg;
82 break;
83 case '?':
84 default:
85 usage();
86 }
87 argc -= optind;
88 argv += optind;
89
90 if (argc < 1)
91 usage();
92
93 if (!*argv[0]) {
94 printf("\n");
95 exit(0);
96 }
97 if ((p = basename(argv[0])) == NULL)
98 err(1, "%s", argv[0]);
99 if ((suffix == NULL && !aflag) && argc == 2) {
100 suffix = argv[1];
101 argc--;
102 }
103 if (suffix != NULL)
104 suffixlen = strlen(suffix);
105 while (argc--) {
106 if ((p = basename(*argv)) == NULL)
107 err(1, "%s", argv[0]);
108 stripsuffix(p, suffix, suffixlen);
109 argv++;
110 (void)printf("%s\n", p);
111 }
112 exit(0);
113 }
114
115 void
stripsuffix(char * p,const char * suffix,size_t suffixlen)116 stripsuffix(char *p, const char *suffix, size_t suffixlen)
117 {
118 char *q, *r;
119 mbstate_t mbs;
120 size_t n;
121
122 if (suffixlen && (q = strchr(p, '\0') - suffixlen) > p &&
123 strcmp(suffix, q) == 0) {
124 /* Ensure that the match occurred on a character boundary. */
125 memset(&mbs, 0, sizeof(mbs));
126 for (r = p; r < q; r += n) {
127 n = mbrlen(r, MB_LEN_MAX, &mbs);
128 if (n == (size_t)-1 || n == (size_t)-2) {
129 memset(&mbs, 0, sizeof(mbs));
130 n = 1;
131 }
132 }
133 /* Chop off the suffix. */
134 if (q == r)
135 *q = '\0';
136 }
137 }
138
139 void
usage(void)140 usage(void)
141 {
142
143 (void)fprintf(stderr,
144 "usage: basename string [suffix]\n"
145 " basename [-a] [-s suffix] string [...]\n");
146 exit(1);
147 }
148