122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <hurd.h>
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#include <hurd/port.h>
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#include <hurd/id.h>
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#include <hurdlock.h>
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#include "set-hooks.h"
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/* Things in the library which want to be run when the auth port changes. */
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DEFINE_HOOK (_hurd_reauth_hook, (auth_t new_auth));
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static unsigned int reauth_lock = LLL_INITIALIZER;
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/* Set the auth port to NEW, and reauthenticate
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everything used by the library. */
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error_t
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_hurd_setauth (auth_t new)
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{
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error_t err;
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unsigned int d;
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mach_port_t newport, ref;
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/* Give the new send right a user reference.
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This is a good way to check that it is valid. */
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if (err = __mach_port_mod_refs (__mach_task_self (), new,
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MACH_PORT_RIGHT_SEND, 1))
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return err;
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HURD_CRITICAL_BEGIN;
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/* We lock against another thread doing setauth. Anyone who sets
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_hurd_ports[INIT_PORT_AUTH] some other way is asking to lose. */
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__mutex_lock (&reauth_lock);
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/* Install the new port in the cell. */
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__mutex_lock (&_hurd_id.lock);
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_hurd_port_set (&_hurd_ports[INIT_PORT_AUTH], new);
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_hurd_id.valid = 0;
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if (_hurd_id.rid_auth)
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{
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__mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth);
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_hurd_id.rid_auth = MACH_PORT_NULL;
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}
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__mutex_unlock (&_hurd_id.lock);
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if (_hurd_init_dtable != NULL)
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/* We just have the simple table we got at startup.
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Otherwise, a reauth_hook in dtable.c takes care of this. */
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for (d = 0; d < _hurd_init_dtablesize; ++d)
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if (_hurd_init_dtable[d] != MACH_PORT_NULL)
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{
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mach_port_t new;
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ref = __mach_reply_port ();
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if (! __io_reauthenticate (_hurd_init_dtable[d],
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ref, MACH_MSG_TYPE_MAKE_SEND) &&
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! HURD_PORT_USE (&_hurd_ports[INIT_PORT_AUTH],
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__auth_user_authenticate
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(port,
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ref, MACH_MSG_TYPE_MAKE_SEND,
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&new)))
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{
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__mach_port_deallocate (__mach_task_self (),
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_hurd_init_dtable[d]);
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_hurd_init_dtable[d] = new;
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}
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__mach_port_destroy (__mach_task_self (), ref);
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}
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ref = __mach_reply_port ();
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if (__USEPORT (CRDIR,
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! __io_reauthenticate (port,
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ref, MACH_MSG_TYPE_MAKE_SEND) &&
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! __auth_user_authenticate (new,
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ref, MACH_MSG_TYPE_MAKE_SEND,
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&newport)))
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_hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], newport);
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__mach_port_destroy (__mach_task_self (), ref);
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ref = __mach_reply_port ();
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if (__USEPORT (CWDIR,
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! __io_reauthenticate (port,
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ref, MACH_MSG_TYPE_MAKE_SEND) &&
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! __auth_user_authenticate (new,
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ref, MACH_MSG_TYPE_MAKE_SEND,
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&newport)))
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_hurd_port_set (&_hurd_ports[INIT_PORT_CWDIR], newport);
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__mach_port_destroy (__mach_task_self (), ref);
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/* Run things which want to do reauthorization stuff. */
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RUN_HOOK (_hurd_reauth_hook, (new));
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__mutex_unlock (&reauth_lock);
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HURD_CRITICAL_END;
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return 0;
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}
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int
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__setauth (auth_t new)
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{
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error_t err = _hurd_setauth (new);
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return err ? __hurd_fail (err) : 0;
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}
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weak_alias (__setauth, setauth)
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