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 __FBSDID("$FreeBSD$"); 46 47 #include <capsicum_helpers.h> 48 #include <err.h> 49 #include <libgen.h> 50 #include <limits.h> 51 #include <locale.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 #include <wchar.h> 57 58 void stripsuffix(char *, const char *, size_t); 59 void usage(void); 60 61 int 62 main(int argc, char **argv) 63 { 64 char *p, *suffix; 65 size_t suffixlen; 66 int aflag, ch; 67 68 setlocale(LC_ALL, ""); 69 70 if (caph_limit_stdio() < 0 || (cap_enter() < 0 && errno != ENOSYS)) 71 err(1, "capsicum"); 72 73 aflag = 0; 74 suffix = NULL; 75 suffixlen = 0; 76 77 while ((ch = getopt(argc, argv, "as:")) != -1) 78 switch(ch) { 79 case 'a': 80 aflag = 1; 81 break; 82 case 's': 83 suffix = optarg; 84 break; 85 case '?': 86 default: 87 usage(); 88 } 89 argc -= optind; 90 argv += optind; 91 92 if (argc < 1) 93 usage(); 94 95 if (!*argv[0]) { 96 printf("\n"); 97 exit(0); 98 } 99 if ((p = basename(argv[0])) == NULL) 100 err(1, "%s", argv[0]); 101 if ((suffix == NULL && !aflag) && argc == 2) { 102 suffix = argv[1]; 103 argc--; 104 } 105 if (suffix != NULL) 106 suffixlen = strlen(suffix); 107 while (argc--) { 108 if ((p = basename(*argv)) == NULL) 109 err(1, "%s", argv[0]); 110 stripsuffix(p, suffix, suffixlen); 111 argv++; 112 (void)printf("%s\n", p); 113 } 114 exit(0); 115 } 116 117 void 118 stripsuffix(char *p, const char *suffix, size_t suffixlen) 119 { 120 char *q, *r; 121 mbstate_t mbs; 122 size_t n; 123 124 if (suffixlen && (q = strchr(p, '\0') - suffixlen) > p && 125 strcmp(suffix, q) == 0) { 126 /* Ensure that the match occurred on a character boundary. */ 127 memset(&mbs, 0, sizeof(mbs)); 128 for (r = p; r < q; r += n) { 129 n = mbrlen(r, MB_LEN_MAX, &mbs); 130 if (n == (size_t)-1 || n == (size_t)-2) { 131 memset(&mbs, 0, sizeof(mbs)); 132 n = 1; 133 } 134 } 135 /* Chop off the suffix. */ 136 if (q == r) 137 *q = '\0'; 138 } 139 } 140 141 void 142 usage(void) 143 { 144 145 (void)fprintf(stderr, 146 "usage: basename string [suffix]\n" 147 " basename [-a] [-s suffix] string [...]\n"); 148 exit(1); 149 } 150