1  /*
       2   * Copyright (C) 2005, 2007, 2009-2021 Free Software Foundation, Inc.
       3   * Written by Jim Meyering.
       4   *
       5   * This program is free software: you can redistribute it and/or modify
       6   * it under the terms of the GNU General Public License as published by
       7   * the Free Software Foundation; either version 3 of the License, or
       8   * (at your option) any later version.
       9   *
      10   * This program is distributed in the hope that it will be useful,
      11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
      12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13   * GNU General Public License for more details.
      14   *
      15   * You should have received a copy of the GNU General Public License
      16   * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <config.h>
      19  
      20  #include <sys/time.h>
      21  
      22  #include "signature.h"
      23  SIGNATURE_CHECK (gettimeofday, int,
      24                   (struct timeval *, GETTIMEOFDAY_TIMEZONE *));
      25  
      26  #include <time.h>
      27  
      28  #include <stdio.h>
      29  #include <string.h>
      30  
      31  int
      32  main (void)
      33  {
      34    time_t t = 0;
      35    struct tm *lt;
      36    struct tm saved_lt;
      37    struct timeval tv;
      38    lt = localtime (&t);
      39    saved_lt = *lt;
      40    gettimeofday (&tv, NULL);
      41    if (memcmp (lt, &saved_lt, sizeof (struct tm)) != 0)
      42      {
      43        fprintf (stderr, "gettimeofday still clobbers the localtime buffer!\n");
      44        return 1;
      45      }
      46    return 0;
      47  }