/* Copyright (C) 1991-2018 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 <hurd.h>

#include <lowlevellock.h>

pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp;

int _hurd_orphaned;

static void

init_pids (void)

{

  __USEPORT (PROC,

	     ({

	       __proc_getpids (port, &_hurd_pid, &_hurd_ppid, &_hurd_orphaned);

	       __proc_getpgrp (port, _hurd_pid, &_hurd_pgrp);

	     }));

  (void) &init_pids;		/* Avoid "defined but not used" warning.  */

}

text_set_element (_hurd_proc_subinit, init_pids);

#include <hurd/msg_server.h>

#include "set-hooks.h"

#include <cthreads.h>

DEFINE_HOOK (_hurd_pgrp_changed_hook, (pid_t));

/* These let user threads synchronize with an operation which changes ids.  */

unsigned int _hurd_pids_changed_stamp;

struct condition _hurd_pids_changed_sync;

kern_return_t

_S_msg_proc_newids (mach_port_t me,

		    task_t task,

		    pid_t ppid, pid_t pgrp, int orphaned)

{

  int pgrp_changed;

  if (task != __mach_task_self ())

    return EPERM;

  __mach_port_deallocate (__mach_task_self (), task);

  pgrp_changed = pgrp != _hurd_pgrp;

  _hurd_ppid = ppid;

  _hurd_pgrp = pgrp;

  _hurd_orphaned = orphaned;

  if (pgrp_changed)

    /* Run things that want notification of a pgrp change.  */

    RUN_HOOK (_hurd_pgrp_changed_hook, (pgrp));

  /* Notify any waiting user threads that the id change as been completed.  */

  ++_hurd_pids_changed_stamp;

  lll_wake (&_hurd_pids_changed_stamp, GSYNC_BROADCAST);

  return 0;

}