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 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 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 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