1/*-
2 * Copyright (c) 1991, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef lint
31static const char copyright[] =
32"@(#) Copyright (c) 1991, 1993, 1994\n\
33	The Regents of the University of California.  All rights reserved.\n";
34#endif
35
36#if 0
37#ifndef lint
38static char sccsid[] = "@(#)basename.c	8.4 (Berkeley) 5/4/95";
39#endif /* not lint */
40#endif
41
42#include <sys/cdefs.h>
43__FBSDID("$FreeBSD$");
44
45#include <err.h>
46#include <libgen.h>
47#include <limits.h>
48#include <locale.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <string.h>
52#include <unistd.h>
53#include <wchar.h>
54
55void stripsuffix(char *, const char *, size_t);
56void usage(void);
57
58int
59main(int argc, char **argv)
60{
61	char *p, *suffix;
62	size_t suffixlen;
63	int aflag, ch;
64
65	setlocale(LC_ALL, "");
66
67	aflag = 0;
68	suffix = NULL;
69	suffixlen = 0;
70
71	while ((ch = getopt(argc, argv, "as:")) != -1)
72		switch(ch) {
73		case 'a':
74			aflag = 1;
75			break;
76		case 's':
77			suffix = optarg;
78			break;
79		case '?':
80		default:
81			usage();
82		}
83	argc -= optind;
84	argv += optind;
85
86	if (argc < 1)
87		usage();
88
89	if (!*argv[0]) {
90		printf("\n");
91		exit(0);
92	}
93	if ((p = basename(argv[0])) == NULL)
94		err(1, "%s", argv[0]);
95	if ((suffix == NULL && !aflag) && argc == 2) {
96		suffix = argv[1];
97		argc--;
98	}
99	if (suffix != NULL)
100		suffixlen = strlen(suffix);
101	while (argc--) {
102		if ((p = basename(*argv)) == NULL)
103			err(1, "%s", argv[0]);
104		stripsuffix(p, suffix, suffixlen);
105		argv++;
106		(void)printf("%s\n", p);
107	}
108	exit(0);
109}
110
111void
112stripsuffix(char *p, const char *suffix, size_t suffixlen)
113{
114	char *q, *r;
115	mbstate_t mbs;
116	size_t n;
117
118	if (suffixlen && (q = strchr(p, '\0') - suffixlen) > p &&
119	    strcmp(suffix, q) == 0) {
120		/* Ensure that the match occurred on a character boundary. */
121		memset(&mbs, 0, sizeof(mbs));
122		for (r = p; r < q; r += n) {
123			n = mbrlen(r, MB_LEN_MAX, &mbs);
124			if (n == (size_t)-1 || n == (size_t)-2) {
125				memset(&mbs, 0, sizeof(mbs));
126				n = 1;
127			}
128		}
129		/* Chop off the suffix. */
130		if (q == r)
131			*q = '\0';
132	}
133}
134
135void
136usage(void)
137{
138
139	(void)fprintf(stderr,
140"usage: basename string [suffix]\n"
141"       basename [-a] [-s suffix] string [...]\n");
142	exit(1);
143}
144