/* Copyright (C) 1993-2018 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 <hurd/id.h>

struct hurd_id_data _hurd_id;

/* Check that _hurd_id.{gen,aux} are valid and update them if not.

   Expects _hurd_id.lock to be held and does not release it.  */

error_t

_hurd_check_ids (void)

{

  if (! _hurd_id.valid)

    {

      inline void dealloc (__typeof (_hurd_id.gen) *p)

	{

	  if (p->uids)

	    {

	      __vm_deallocate (__mach_task_self (),

			       (vm_address_t) p->uids,

			       p->nuids * sizeof (uid_t));

	      p->uids = NULL;

	    }

	  p->nuids = 0;

	  if (p->gids)

	    {

	      __vm_deallocate (__mach_task_self (),

			       (vm_address_t) p->gids,

			       p->ngids * sizeof (gid_t));

	      p->gids = NULL;

	    }

	  p->ngids = 0;

	}

      error_t err;

      dealloc (&_hurd_id.gen);

      dealloc (&_hurd_id.aux);

      if (_hurd_id.rid_auth != MACH_PORT_NULL)

	{

	  __mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth);

	  _hurd_id.rid_auth = MACH_PORT_NULL;

	}

      if (err = __USEPORT (AUTH, __auth_getids

			   (port,

			    &_hurd_id.gen.uids, &_hurd_id.gen.nuids,

			    &_hurd_id.aux.uids, &_hurd_id.aux.nuids,

			    &_hurd_id.gen.gids, &_hurd_id.gen.ngids,

			    &_hurd_id.aux.gids, &_hurd_id.aux.ngids)))

	return err;

      _hurd_id.valid = 1;

    }

  return 0;

}

static void

init_id (void)

{

  __mutex_init (&_hurd_id.lock);

  _hurd_id.valid = 0;

  _hurd_id.rid_auth = MACH_PORT_NULL;

  _hurd_id.gen.uids = _hurd_id.aux.uids = NULL;

  _hurd_id.gen.nuids = _hurd_id.aux.nuids = 0;

  _hurd_id.gen.gids = _hurd_id.aux.gids = NULL;

  _hurd_id.gen.ngids = _hurd_id.aux.ngids = 0;

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

}

text_set_element (_hurd_preinit_hook, init_id);