1  /* Test for settimeofday
       2     Copyright (C) 2021-2023 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 <sys/time.h>
      22  #include <support/check.h>
      23  #include <support/xtime.h>
      24  
      25  #define TIMESPEC_SEC_Y2038_OV 0x7FFFFFFF
      26  #define FUTURE_TIME (TIMESPEC_SEC_Y2038_OV - 10)
      27  
      28  static int
      29  do_test (void)
      30  {
      31    const struct timeval tv = { FUTURE_TIME, 0};
      32    struct timespec tv_future, tv_now;
      33  
      34    /* Check if altering target time is allowed.  */
      35    if (getenv (SETTIME_ENV_NAME) == NULL)
      36      FAIL_UNSUPPORTED ("settimeofday is executed only when "\
      37                        SETTIME_ENV_NAME" is set\n");
      38  
      39    tv_now = xclock_now (CLOCK_REALTIME);
      40    int ret = settimeofday (&tv, NULL);
      41    if (ret == -1)
      42      FAIL_EXIT1 ("settimeofday failed: %m\n");
      43  
      44    tv_future = xclock_now (CLOCK_REALTIME);
      45  
      46    /* Restore old time value on target machine.  */
      47    xclock_settime (CLOCK_REALTIME, (const struct timespec*) &tv_now);
      48  
      49    if (tv_future.tv_sec < tv.tv_sec)
      50      FAIL_EXIT1 ("settimeofday set wrong time!\n");
      51  
      52    return 0;
      53  }
      54  
      55  #include <support/test-driver.c>