/* Time-triggered process termination.

   Copyright (C) 2016-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <support/xthread.h>

#include <support/xsignal.h>

#include <stdint.h>

#include <stdio.h>

#include <stdlib.h>

#include <support/check.h>

#include <time.h>

static void *

delayed_exit_thread (void *seconds_as_ptr)

{

  int seconds = (uintptr_t) seconds_as_ptr;

  struct timespec delay = { seconds, 0 };

  struct timespec remaining = { 0 };

  if (nanosleep (&delay, &remaining) != 0)

    FAIL_EXIT1 ("nanosleep: %m");

  /* Exit the process sucessfully.  */

  exit (0);

  return NULL;

}

void

delayed_exit (int seconds)

{

  /* Create the new thread with all signals blocked.  */

  sigset_t all_blocked;

  sigfillset (&all_blocked);

  sigset_t old_set;

  xpthread_sigmask (SIG_SETMASK, &all_blocked, &old_set);

  /* Create a detached thread. */

  pthread_t thr = xpthread_create

    (NULL, delayed_exit_thread, (void *) (uintptr_t) seconds);

  xpthread_detach (thr);

  /* Restore the original signal mask.  */

  xpthread_sigmask (SIG_SETMASK, &old_set, NULL);

}