gl/tests/test-getopt.c

   1 /* Test of command line argument processing.
   2    Copyright (C) 2009-2012 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
  18
  19 #include <config.h>
  20
  21 /* None of the files accessed by this test are large, so disable the
  22    ftell link warning if we are not using the gnulib ftell module.  */
  23 #define _GL_NO_LARGE_FILES
  24
  25 #if GNULIB_TEST_GETOPT_GNU
  26 # include <getopt.h>
  27
  28 # ifndef __getopt_argv_const
  29 #  define __getopt_argv_const const
  30 # endif
  31 # include "signature.h"
  32 SIGNATURE_CHECK (getopt_long, int, (int, char *__getopt_argv_const *,
  33                                     char const *, struct option const *,
  34                                     int *));
  35 SIGNATURE_CHECK (getopt_long_only, int, (int, char *__getopt_argv_const *,
  36                                          char const *, struct option const *,
  37                                          int *));
  38
  39 #endif
  40
  41 #include <unistd.h>
  42
  43 #include "signature.h"
  44 SIGNATURE_CHECK (getopt, int, (int, char * const[], char const *));
  45
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49
  50 /* This test intentionally remaps stderr.  So, we arrange to have fd 10
  51    (outside the range of interesting fd's during the test) set up to
  52    duplicate the original stderr.  */
  53
  54 #define BACKUP_STDERR_FILENO 10
  55 #define ASSERT_STREAM myerr
  56 #include "macros.h"
  57
  58 static FILE *myerr;
  59
  60 #include "test-getopt.h"
  61 #if GNULIB_TEST_GETOPT_GNU
  62 # include "test-getopt_long.h"
  63 #endif
  64
  65 int
  66 main (void)
  67 {
  68    /* This test validates that stderr is used correctly, so move the
  69       original into fd 10.  */
  70   if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO
  71       || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL)
  72     return 2;
  73
  74   ASSERT (freopen ("test-getopt.tmp", "w", stderr) == stderr);
  75
  76   /* These default values are required by POSIX.  */
  77   ASSERT (optind == 1);
  78   ASSERT (opterr != 0);
  79
  80   setenv ("POSIXLY_CORRECT", "1", 1);
  81   test_getopt ();
  82
  83 #if GNULIB_TEST_GETOPT_GNU
  84   test_getopt_long_posix ();
  85 #endif
  86
  87   unsetenv ("POSIXLY_CORRECT");
  88   test_getopt ();
  89
  90 #if GNULIB_TEST_GETOPT_GNU
  91   test_getopt_long ();
  92   test_getopt_long_only ();
  93 #endif
  94
  95   ASSERT (fclose (stderr) == 0);
  96   ASSERT (remove ("test-getopt.tmp") == 0);
  97
  98   return 0;
  99 }