1  /* Test for localtime bug in year 2039 (bug 22639).
       2     Copyright (C) 2017-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library 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 GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <time.h>
      20  #include <stdlib.h>
      21  #include <stdio.h>
      22  #include <string.h>
      23  #include <support/check.h>
      24  
      25  static int
      26  do_test (void)
      27  {
      28    TEST_VERIFY_EXIT (setenv ("TZ", "PST8PDT,M3.2.0,M11.1.0", 1) == 0);
      29    tzset ();
      30    if (sizeof (time_t) > 4)
      31      {
      32        time_t ouch = (time_t) 2187810000LL;
      33        char buf[500];
      34        struct tm *tm = localtime (&ouch);
      35        TEST_VERIFY_EXIT (tm != NULL);
      36        TEST_VERIFY_EXIT (strftime (buf, sizeof buf, "%Y-%m-%d %H:%M:%S %Z", tm)
      37  			> 0);
      38        puts (buf);
      39        TEST_VERIFY (strcmp (buf, "2039-04-30 14:00:00 PDT") == 0);
      40  
      41        /* Same as before but for localtime_r.  */
      42        struct tm tmd;
      43        tm = localtime_r (&ouch, &tmd);
      44        TEST_VERIFY_EXIT (tm == &tmd);
      45  
      46        TEST_VERIFY_EXIT (strftime (buf, sizeof buf, "%Y-%m-%d %H:%M:%S %Z", tm)
      47  			> 0);
      48        puts (buf);
      49        TEST_VERIFY (strcmp (buf, "2039-04-30 14:00:00 PDT") == 0);
      50      }
      51    else
      52      FAIL_UNSUPPORTED ("32-bit time_t");
      53    return 0;
      54  }
      55  
      56  #include <support/test-driver.c>