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glibc/hurd/setauth.c
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/* Copyright (C) 1991-2016 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/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) |