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 <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