1  /* Test of command line argument processing.
       2     Copyright (C) 2009-2021 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 <https://www.gnu.org/licenses/>.  */
      16  
      17  /* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
      18  
      19  #include "signature.h"
      20  SIGNATURE_CHECK (getopt, int, (int, char * const[], char const *));
      21  
      22  #include <stdio.h>
      23  #include <stdlib.h>
      24  #include <string.h>
      25  #include <unistd.h>
      26  
      27  /* This test intentionally remaps stderr.  So, we arrange to have fd 10
      28     (outside the range of interesting fd's during the test) set up to
      29     duplicate the original stderr.  */
      30  
      31  #define BACKUP_STDERR_FILENO 10
      32  #define ASSERT_STREAM myerr
      33  #include "macros.h"
      34  
      35  static FILE *myerr;
      36  
      37  #include "test-getopt.h"
      38  #if TEST_GETOPT_GNU
      39  # include "test-getopt_long.h"
      40  #endif
      41  
      42  int
      43  main (void)
      44  {
      45     /* This test validates that stderr is used correctly, so move the
      46        original into fd 10.  */
      47    if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO
      48        || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL)
      49      return 2;
      50  
      51    ASSERT (freopen (TEST_GETOPT_TMP_NAME, "w", stderr) == stderr);
      52  
      53    /* These default values are required by POSIX.  */
      54    ASSERT (optind == 1);
      55    ASSERT (opterr != 0);
      56  
      57    setenv ("POSIXLY_CORRECT", "1", 1);
      58    test_getopt ();
      59  
      60  #if TEST_GETOPT_GNU
      61    test_getopt_long_posix ();
      62  #endif
      63  
      64    unsetenv ("POSIXLY_CORRECT");
      65    test_getopt ();
      66  
      67  #if TEST_GETOPT_GNU
      68    test_getopt_long ();
      69    test_getopt_long_only ();
      70  #endif
      71  
      72    ASSERT (fclose (stderr) == 0);
      73    ASSERT (remove (TEST_GETOPT_TMP_NAME) == 0);
      74  
      75    return 0;
      76  }