external/bsd/libarchive/dist/tar/test/test_help.c

   1 /*-
   2  * Copyright (c) 2003-2007 Tim Kientzle
   3  * 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  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25 #include "test.h"
  26 __FBSDID("$FreeBSD: src/usr.bin/tar/test/test_help.c,v 1.2 2008/05/26 17:10:10 kientzle Exp $");
  27
  28 /*
  29  * Test that "--help", "-h", and "-W help" options all work and
  30  * generate reasonable output.
  31  */
  32
  33 static int
  34 in_first_line(const char *p, const char *substring)
  35 {
  36         size_t l = strlen(substring);
  37
  38         while (*p != '\0' && *p != '\n') {
  39                 if (memcmp(p, substring, l) == 0)
  40                         return (1);
  41                 ++p;
  42         }
  43         return (0);
  44 }
  45
  46 DEFINE_TEST(test_help)
  47 {
  48         int r;
  49         char *p;
  50         size_t plen;
  51
  52         /* Exercise --help option. */
  53         r = systemf("%s --help >help.stdout 2>help.stderr", testprog);
  54         failure("--help should generate nothing to stderr.");
  55         assertEmptyFile("help.stderr");
  56         /* Help message should start with name of program. */
  57         p = slurpfile(&plen, "help.stdout");
  58         failure("Help output should be long enough.");
  59         assert(plen >= 6);
  60         failure("First line of help output should contain 'bsdtar': %s", p);
  61         assert(in_first_line(p, "bsdtar"));
  62         /*
  63          * TODO: Extend this check to further verify that --help output
  64          * looks approximately right.
  65          */
  66         free(p);
  67
  68         /* -h option should generate the same output. */
  69         r = systemf("%s -h >h.stdout 2>h.stderr", testprog);
  70         failure("-h should generate nothing to stderr.");
  71         assertEmptyFile("h.stderr");
  72         failure("stdout should be same for -h and --help");
  73         assertEqualFile("h.stdout", "help.stdout");
  74
  75         /* -W help should be another synonym. */
  76         r = systemf("%s -W help >Whelp.stdout 2>Whelp.stderr", testprog);
  77         failure("-W help should generate nothing to stderr.");
  78         assertEmptyFile("Whelp.stderr");
  79         failure("stdout should be same for -W help and --help");
  80         assertEqualFile("Whelp.stdout", "help.stdout");
  81 }