sysdeps/unix/sysv/linux/settimezone.c

   1 /* Obsolete set system time.  Linux version.
   2    Copyright (C) 2019-2024 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <sys/time.h>
  21 #include <stddef.h>
  22 #include <sysdep.h>
  23
  24 /* Set the system-wide timezone.
  25    This call is restricted to the super-user.
  26    This operation is considered obsolete, kernel support may not be
  27    available on all architectures.  */
  28 int
  29 __settimezone (const struct timezone *tz)
  30 {
  31 #ifdef __NR_settimeofday
  32   return INLINE_SYSCALL_CALL (settimeofday, NULL, tz);
  33 #else
  34   __set_errno (ENOSYS);
  35   return -1;
  36 #endif
  37 }