usr.bin/dirname/dirname.c

   1 /*      $NetBSD: dirname.c,v 1.10 2005/04/04 16:46:55 peter Exp $       */
   2
   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 <sys/cdefs.h>
  33 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1991, 1993, 1994\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)dirname.c   8.4 (Berkeley) 5/4/95";
  41 #endif
  42 __RCSID("$NetBSD: dirname.c,v 1.10 2005/04/04 16:46:55 peter Exp $");
  43 #endif /* not lint */
  44
  45 #include <err.h>
  46 #include <libgen.h>
  47 #include <locale.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <unistd.h>
  51
  52 static void usage(void);
  53
  54 int
  55 main(int argc, char **argv)
  56 {
  57         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)
  72                 usage();
  73
  74         if ((p = dirname(*argv)) == NULL)
  75                 err(1, "%s", *argv);
  76         (void)printf("%s\n", p);
  77         exit(0);
  78 }
  79
  80 static void
  81 usage(void)
  82 {
  83
  84         (void)fprintf(stderr, "usage: dirname path\n");
  85         exit(1);
  86 }