sysdeps/mach/hurd/clock_settime.c

   1 /* Copyright (C) 1991-2020 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 <hurd.h>
  21 #include <hurd/port.h>
  22 #include <shlib-compat.h>
  23
  24 /* Set the current time of day.
  25    This call is restricted to the super-user.  */
  26 int
  27 __clock_settime (clockid_t clock_id, const struct timespec *ts)
  28 {
  29   error_t err;
  30   mach_port_t hostpriv;
  31   time_value_t tv;
  32
  33   if (clock_id != CLOCK_REALTIME
  34       || ! valid_nanoseconds (ts->tv_nsec))
  35     return __hurd_fail (EINVAL);
  36
  37   err = __get_privileged_ports (&hostpriv, NULL);
  38   if (err)
  39     return __hurd_fail (EPERM);
  40
  41   TIMESPEC_TO_TIME_VALUE (&tv, ts);
  42   err = __host_set_time (hostpriv, tv);
  43   __mach_port_deallocate (__mach_task_self (), hostpriv);
  44
  45   return __hurd_fail (err);
  46 }
  47 libc_hidden_def (__clock_settime)
  48
  49 versioned_symbol (libc, __clock_settime, clock_settime, GLIBC_2_17);
  50 /* clock_settime moved to libc in version 2.17;
  51    old binaries may expect the symbol version it had in librt.  */
  52 #if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)
  53 strong_alias (__clock_settime, __clock_settime_2);
  54 compat_symbol (libc, __clock_settime_2, clock_settime, GLIBC_2_2);
  55 #endif