2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1991, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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 * 4. 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.
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
33 static const char copyright[] =
34 "@(#) Copyright (c) 1991, 1993, 1994\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)basename.c 8.4 (Berkeley) 5/4/95";
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
57 void stripsuffix(char *, const char *, size_t);
61 main(int argc, char **argv)
67 setlocale(LC_ALL, "");
73 while ((ch = getopt(argc, argv, "as:")) != -1)
95 if ((p = basename(argv[0])) == NULL)
96 err(1, "%s", argv[0]);
97 if ((suffix == NULL && !aflag) && argc == 2) {
102 suffixlen = strlen(suffix);
104 if ((p = basename(*argv)) == NULL)
105 err(1, "%s", argv[0]);
106 stripsuffix(p, suffix, suffixlen);
108 (void)printf("%s\n", p);
114 stripsuffix(char *p, const char *suffix, size_t suffixlen)
120 if (suffixlen && (q = strchr(p, '\0') - suffixlen) > p &&
121 strcmp(suffix, q) == 0) {
122 /* Ensure that the match occurred on a character boundary. */
123 memset(&mbs, 0, sizeof(mbs));
124 for (r = p; r < q; r += n) {
125 n = mbrlen(r, MB_LEN_MAX, &mbs);
126 if (n == (size_t)-1 || n == (size_t)-2) {
127 memset(&mbs, 0, sizeof(mbs));
131 /* Chop off the suffix. */
141 (void)fprintf(stderr,
142 "usage: basename string [suffix]\n"
143 " basename [-a] [-s suffix] string [...]\n");