[thirdparty/glibc.git] / hurd / setauth.c

/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <hurd.h>
#include <hurd/port.h>
#include <hurd/id.h>
#include "set-hooks.h"

/* Things in the library which want to be run when the auth port changes.  */
DEFINE_HOOK (_hurd_reauth_hook, (auth_t new_auth));

#include <cthreads.h>
static struct mutex reauth_lock = MUTEX_INITIALIZER;


/* Set the auth port to NEW, and reauthenticate
   everything used by the library.  */
error_t
_hurd_setauth (auth_t new)
{
  error_t err;
  unsigned int d;
  mach_port_t newport, ref;

  /* Give the new send right a user reference.
     This is a good way to check that it is valid.  */
  if (err = __mach_port_mod_refs (__mach_task_self (), new,
				  MACH_PORT_RIGHT_SEND, 1))
    return err;

  HURD_CRITICAL_BEGIN;

  /* We lock against another thread doing setauth.  Anyone who sets
     _hurd_ports[INIT_PORT_AUTH] some other way is asking to lose.  */
  __mutex_lock (&reauth_lock);

  /* Install the new port in the cell.  */
  __mutex_lock (&_hurd_id.lock);
  _hurd_port_set (&_hurd_ports[INIT_PORT_AUTH], new);
  _hurd_id.valid = 0;
  if (_hurd_id.rid_auth)
    {
      __mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth);
      _hurd_id.rid_auth = MACH_PORT_NULL;
    }
  __mutex_unlock (&_hurd_id.lock);

  if (_hurd_init_dtable != NULL)
    /* We just have the simple table we got at startup.
       Otherwise, a reauth_hook in dtable.c takes care of this.  */
    for (d = 0; d < _hurd_init_dtablesize; ++d)
      if (_hurd_init_dtable[d] != MACH_PORT_NULL)
	{
	  mach_port_t new;
	  ref = __mach_reply_port ();
	  if (! __io_reauthenticate (_hurd_init_dtable[d],
				     ref, MACH_MSG_TYPE_MAKE_SEND) &&
	      ! HURD_PORT_USE (&_hurd_ports[INIT_PORT_AUTH],
			       __auth_user_authenticate
			       (port,
				ref, MACH_MSG_TYPE_MAKE_SEND,
				&new)))
	    {
	      __mach_port_deallocate (__mach_task_self (),
				      _hurd_init_dtable[d]);
	      _hurd_init_dtable[d] = new;
	    }
	  __mach_port_destroy (__mach_task_self (), ref);
	}

  ref = __mach_reply_port ();
  if (__USEPORT (CRDIR,
		 ! __io_reauthenticate (port,
					ref, MACH_MSG_TYPE_MAKE_SEND) &&
		 ! __auth_user_authenticate (new,
					     ref, MACH_MSG_TYPE_MAKE_SEND,
					     &newport)))
    _hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], newport);
  __mach_port_destroy (__mach_task_self (), ref);

  ref = __mach_reply_port ();
  if (__USEPORT (CWDIR,
		 ! __io_reauthenticate (port,
					ref, MACH_MSG_TYPE_MAKE_SEND) &&
		 ! __auth_user_authenticate (new,
					     ref, MACH_MSG_TYPE_MAKE_SEND,
					     &newport)))
    _hurd_port_set (&_hurd_ports[INIT_PORT_CWDIR], newport);
  __mach_port_destroy (__mach_task_self (), ref);

  /* Run things which want to do reauthorization stuff.  */
  RUN_HOOK (_hurd_reauth_hook, (new));

  __mutex_unlock (&reauth_lock);

  HURD_CRITICAL_END;

  return 0;
}

int
__setauth (auth_t new)
{
  error_t err = _hurd_setauth (new);
  return err ? __hurd_fail (err) : 0;
}

weak_alias (__setauth, setauth)
Commit	Line	Data
c84142e8 UD	1	/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 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
41bdb6e2 AJ	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.
c84142e8 UD	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
41bdb6e2	12	Lesser General Public License for more details.
c84142e8	13
41bdb6e2 AJ	14	You should have received a copy of the GNU Lesser General Public
	15	License along with the GNU C Library; if not, write to the Free
	16	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	17	02111-1307 USA. */
28f540f4 RM	18
	19	#include <hurd.h>
	20	#include <hurd/port.h>
	21	#include <hurd/id.h>
	22	#include "set-hooks.h"
	23
	24	/* Things in the library which want to be run when the auth port changes. */
	25	DEFINE_HOOK (_hurd_reauth_hook, (auth_t new_auth));
	26
	27	#include <cthreads.h>
	28	static struct mutex reauth_lock = MUTEX_INITIALIZER;
	29
	30
	31	/* Set the auth port to NEW, and reauthenticate
	32	everything used by the library. */
	33	error_t
	34	_hurd_setauth (auth_t new)
	35	{
	36	error_t err;
1e9dc039	37	unsigned int d;
28f540f4 RM	38	mach_port_t newport, ref;
	39
	40	/* Give the new send right a user reference.
	41	This is a good way to check that it is valid. */
	42	if (err = __mach_port_mod_refs (__mach_task_self (), new,
	43	MACH_PORT_RIGHT_SEND, 1))
	44	return err;
	45
	46	HURD_CRITICAL_BEGIN;
	47
	48	/* We lock against another thread doing setauth. Anyone who sets
	49	_hurd_ports[INIT_PORT_AUTH] some other way is asking to lose. */
	50	__mutex_lock (&reauth_lock);
	51
	52	/* Install the new port in the cell. */
	53	__mutex_lock (&_hurd_id.lock);
	54	_hurd_port_set (&_hurd_ports[INIT_PORT_AUTH], new);
	55	_hurd_id.valid = 0;
	56	if (_hurd_id.rid_auth)
	57	{
	58	__mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth);
	59	_hurd_id.rid_auth = MACH_PORT_NULL;
	60	}
	61	__mutex_unlock (&_hurd_id.lock);
	62
	63	if (_hurd_init_dtable != NULL)
	64	/* We just have the simple table we got at startup.
	65	Otherwise, a reauth_hook in dtable.c takes care of this. */
	66	for (d = 0; d < _hurd_init_dtablesize; ++d)
	67	if (_hurd_init_dtable[d] != MACH_PORT_NULL)
	68	{
	69	mach_port_t new;
	70	ref = __mach_reply_port ();
	71	if (! __io_reauthenticate (_hurd_init_dtable[d],
	72	ref, MACH_MSG_TYPE_MAKE_SEND) &&
	73	! HURD_PORT_USE (&_hurd_ports[INIT_PORT_AUTH],
	74	__auth_user_authenticate
	75	(port,
28f540f4 RM	76	ref, MACH_MSG_TYPE_MAKE_SEND,
	77	&new)))
	78	{
	79	__mach_port_deallocate (__mach_task_self (),
	80	_hurd_init_dtable[d]);
	81	_hurd_init_dtable[d] = new;
	82	}
	83	__mach_port_destroy (__mach_task_self (), ref);
	84	}
	85
	86	ref = __mach_reply_port ();
	87	if (__USEPORT (CRDIR,
	88	! __io_reauthenticate (port,
	89	ref, MACH_MSG_TYPE_MAKE_SEND) &&
8f0c527e	90	! __auth_user_authenticate (new,
28f540f4 RM	91	ref, MACH_MSG_TYPE_MAKE_SEND,
	92	&newport)))
	93	_hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], newport);
	94	__mach_port_destroy (__mach_task_self (), ref);
	95
	96	ref = __mach_reply_port ();
	97	if (__USEPORT (CWDIR,
	98	! __io_reauthenticate (port,
	99	ref, MACH_MSG_TYPE_MAKE_SEND) &&
8f0c527e	100	! __auth_user_authenticate (new,
28f540f4 RM	101	ref, MACH_MSG_TYPE_MAKE_SEND,
	102	&newport)))
	103	_hurd_port_set (&_hurd_ports[INIT_PORT_CWDIR], newport);
	104	__mach_port_destroy (__mach_task_self (), ref);
	105
	106	/* Run things which want to do reauthorization stuff. */
	107	RUN_HOOK (_hurd_reauth_hook, (new));
	108
	109	__mutex_unlock (&reauth_lock);
	110
	111	HURD_CRITICAL_END;
	112
	113	return 0;
	114	}
	115
	116	int
	117	__setauth (auth_t new)
	118	{
	119	error_t err = _hurd_setauth (new);
	120	return err ? __hurd_fail (err) : 0;
	121	}
	122
	123	weak_alias (__setauth, setauth)