1 /* $OpenBSD: dirname.c,v 1.15 2015/10/09 01:37:07 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <err.h> 20 #include <libgen.h> 21 #include <locale.h> 22 #include <stdio.h> 23 #include <stdlib.h> 24 #include <unistd.h> 25 26 void usage(void); 27 28 int 29 main(int argc, char *argv[]) 30 { 31 int ch; 32 char *dir; 33 34 setlocale(LC_ALL, ""); 35 36 if (pledge("stdio", NULL) == -1) 37 err(1, "pledge"); 38 39 while ((ch = getopt(argc, argv, "")) != -1) { 40 switch (ch) { 41 default: 42 usage(); 43 } 44 } 45 argc -= optind; 46 argv += optind; 47 48 if (argc != 1) 49 usage(); 50 51 if ((dir = dirname(argv[0])) == NULL) 52 err(1, "%s", argv[0]); 53 puts(dir); 54 exit(0); 55 } 56 57 extern char *__progname; 58 59 void 60 usage(void) 61 { 62 (void)fprintf(stderr, "usage: %s pathname\n", __progname); 63 exit(1); 64 } 65