1  /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library 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 GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <time.h>
      20  #include <sys/time.h>
      21  
      22  /* Set the current time of day and timezone information.
      23     This call is restricted to the super-user.  */
      24  int
      25  __settimeofday (const struct timeval *tv, const struct timezone *tz)
      26  {
      27    if (__glibc_unlikely (tz != 0))
      28      {
      29        if (tv != 0)
      30  	{
      31  	  __set_errno (EINVAL);
      32  	  return -1;
      33  	}
      34        return __settimezone (tz);
      35      }
      36  
      37    struct timespec ts;
      38    TIMEVAL_TO_TIMESPEC (tv, &ts);
      39    return __clock_settime (CLOCK_REALTIME, &ts);
      40  }
      41  
      42  #ifdef VERSION_settimeofday
      43  weak_alias (__settimeofday, __settimeofday_w);
      44  default_symbol_version (__settimeofday_w, settimeofday, VERSION_settimeofday);
      45  #else
      46  weak_alias (__settimeofday, settimeofday);
      47  #endif