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 * 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 * $FreeBSD: src/usr.bin/basename/basename.c,v 1.3.6.2 2001/08/02 00:59:28 obrien Exp $ 34 * $DragonFly: src/usr.bin/basename/basename.c,v 1.3 2003/10/02 17:42:25 hmp Exp $ 35 * 36 * @(#) Copyright (c) 1991, 1993, 1994 The Regents of the University of California. All rights reserved. 37 * @(#)basename.c 8.4 (Berkeley) 5/4/95 38 */ 39 40 #include <err.h> 41 #include <libgen.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 int main(int, char **); 48 void usage(void); 49 50 int 51 main(int argc, char **argv) 52 { 53 char *p, *q; 54 int ch; 55 56 while ((ch = getopt(argc, argv, "")) != -1) 57 switch(ch) { 58 case '?': 59 default: 60 usage(); 61 } 62 argc -= optind; 63 argv += optind; 64 65 if (argc != 1 && argc != 2) 66 usage(); 67 68 if (!*argv[0]) { 69 printf("\n"); 70 exit(0); 71 } 72 if ((p = basename(argv[0])) == NULL) 73 err(1, "%s", argv[0]); 74 if (*++argv && (q = strchr(p, '\0') - strlen(*argv)) > p && 75 strcmp(*argv, q) == 0) 76 *q = '\0'; 77 (void)printf("%s\n", p); 78 exit(0); 79 } 80 81 void 82 usage(void) 83 { 84 85 (void)fprintf(stderr, "usage: basename string [suffix]\n"); 86 exit(1); 87 } 88