1  /* settimeofday -- set system time - Linux version supporting 64 bit time.
       2     Copyright (C) 2020-2023 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 <errno.h>
      20  #include <time.h>
      21  #include <sys/time.h>
      22  
      23  /* Set the current time of day and timezone information.
      24     This call is restricted to the super-user.  */
      25  int
      26  __settimeofday64 (const struct __timeval64 *tv, const struct timezone *tz)
      27  {
      28    /* Backwards compatibility for setting the UTC offset.  */
      29    if (__glibc_unlikely (tz != 0))
      30      {
      31        if (tv != 0)
      32  	{
      33  	  __set_errno (EINVAL);
      34  	  return -1;
      35  	}
      36        return __settimezone (tz);
      37      }
      38  
      39    struct __timespec64 ts = timeval64_to_timespec64 (*tv);
      40    return __clock_settime64 (CLOCK_REALTIME, &ts);
      41  }
      42  
      43  #if __TIMESIZE != 64
      44  libc_hidden_def (__settimeofday64)
      45  
      46  int
      47  __settimeofday (const struct timeval *tv, const struct timezone *tz)
      48  {
      49    if (__glibc_unlikely (tv == NULL))
      50      return __settimeofday64 (NULL, tz);
      51    else
      52      {
      53        struct __timeval64 tv64 = valid_timeval_to_timeval64 (*tv);
      54        return __settimeofday64 (&tv64, tz);
      55      }
      56  }
      57  #endif
      58  weak_alias (__settimeofday, settimeofday);