1 /* $OpenBSD: basename.c,v 1.14 2016/10/28 07:22:59 schwarze Exp $ */ 2 /* $NetBSD: basename.c,v 1.9 1995/09/02 05:29:46 jtc Exp $ */ 3 4 /*- 5 * Copyright (c) 1991, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <err.h> 34 #include <libgen.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 static void __dead usage(void); 41 42 int 43 main(int argc, char *argv[]) 44 { 45 int ch; 46 char *p; 47 48 if (pledge("stdio", NULL) == -1) 49 err(1, "pledge"); 50 51 while ((ch = getopt(argc, argv, "")) != -1) { 52 switch (ch) { 53 default: 54 usage(); 55 } 56 } 57 argc -= optind; 58 argv += optind; 59 60 if (argc != 1 && argc != 2) 61 usage(); 62 63 if (**argv == '\0') { 64 (void)puts(""); 65 return 0; 66 } 67 p = basename(*argv); 68 if (p == NULL) 69 err(1, "%s", *argv); 70 /* 71 * If the suffix operand is present, is not identical to the 72 * characters remaining in string, and is identical to a suffix 73 * of the characters remaining in string, the suffix suffix 74 * shall be removed from string. 75 */ 76 if (*++argv) { 77 size_t suffixlen, stringlen, off; 78 79 suffixlen = strlen(*argv); 80 stringlen = strlen(p); 81 82 if (suffixlen < stringlen) { 83 off = stringlen - suffixlen; 84 if (!strcmp(p + off, *argv)) 85 p[off] = '\0'; 86 } 87 } 88 (void)puts(p); 89 return 0; 90 } 91 92 extern char *__progname; 93 94 static void __dead 95 usage(void) 96 { 97 98 (void)fprintf(stderr, "usage: %s string [suffix]\n", __progname); 99 exit(1); 100 } 101