bin/realpath/realpath.c

   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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: head/bin/realpath/realpath.c 223372 2011-06-21 19:34:57Z ru $
  30  */
  31
  32
  33 #include <sys/param.h>
  34
  35 #include <err.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <unistd.h>
  39
  40 static void usage(void) __dead2;
  41
  42 int
  43 main(int argc, char *argv[])
  44 {
  45         char buf[PATH_MAX];
  46         char *p;
  47         const char *path;
  48         int ch, qflag, rval;
  49
  50         qflag = 0;
  51         while ((ch = getopt(argc, argv, "q")) != -1) {
  52                 switch (ch) {
  53                 case 'q':
  54                         qflag = 1;
  55                         break;
  56                 case '?':
  57                 default:
  58                         usage();
  59                 }
  60         }
  61         argc -= optind;
  62         argv += optind;
  63         path = *argv != NULL ? *argv++ : ".";
  64         rval  = 0;
  65         do {
  66                 if ((p = realpath(path, buf)) == NULL) {
  67                         if (!qflag)
  68                                 warn("%s", path);
  69                         rval = 1;
  70                 } else
  71                         (void)printf("%s\n", p);
  72         } while ((path = *argv++) != NULL);
  73         exit(rval);
  74 }
  75
  76 static void
  77 usage(void)
  78 {
  79
  80         (void)fprintf(stderr, "usage: realpath [-q] [path ...]\n");
  81         exit(1);
  82 }