1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * 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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)basename.c 5.1 (Berkeley) 3/9/91";*/ 42 static char rcsid[] = "$Id: basename.c,v 1.5 1993/11/19 19:58:46 jtc Exp $"; 43 #endif /* not lint */ 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <locale.h> 49 50 static void usage __P((void)); 51 52 int 53 main(argc, argv) 54 int argc; 55 char **argv; 56 { 57 register char *p; 58 int ch; 59 60 setlocale(LC_ALL, ""); 61 62 while ((ch = getopt(argc, argv, "")) != -1) 63 switch(ch) { 64 case '?': 65 default: 66 usage(); 67 } 68 argc -= optind; 69 argv += optind; 70 71 if (argc != 1 && argc != 2) 72 usage(); 73 74 /* 75 * (1) If string is // it is implementation defined whether steps (2) 76 * through (5) are skipped or processed. 77 * 78 * (2) If string consists entirely of slash characters, string shall 79 * be set to a single slash character. In this case, skip steps 80 * (3) through (5). 81 */ 82 for (p = *argv;; ++p) { 83 if (!*p) { 84 if (p > *argv) 85 (void)printf("/\n"); 86 else 87 (void)printf("\n"); 88 exit(0); 89 } 90 if (*p != '/') 91 break; 92 } 93 94 /* 95 * (3) If there are any trailing slash characters in string, they 96 * shall be removed. 97 */ 98 for (; *p; ++p) 99 ; 100 while (*--p == '/') 101 ; 102 *++p = '\0'; 103 104 /* 105 * (4) If there are any slash characters remaining in string, the 106 * prefix of string up to an including the last slash character 107 * in string shall be removed. 108 */ 109 while (--p >= *argv) 110 if (*p == '/') 111 break; 112 ++p; 113 114 /* 115 * (5) If the suffix operand is present, is not identical to the 116 * characters remaining in string, and is identical to a suffix 117 * of the characters remaining in string, the suffix suffix 118 * shall be removed from string. 119 */ 120 if (*++argv) { 121 int suffixlen, stringlen, off; 122 123 suffixlen = strlen(*argv); 124 stringlen = strlen(p); 125 126 if (suffixlen < stringlen) { 127 off = stringlen - suffixlen; 128 if (!strcmp(p + off, *argv)) 129 p[off] = '\0'; 130 } 131 } 132 (void)printf("%s\n", p); 133 exit(0); 134 } 135 136 static void 137 usage() 138 { 139 (void)fprintf(stderr, "usage: basename string [suffix]\n"); 140 exit(1); 141 } 142