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/* Copyright (C) 1991, 92, 93, 94, 95, 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <hurd.h>
#include <hurd/msg_server.h>
#include <hurd/id.h>
#include <string.h>
int
_hurd_refport_secure_p (mach_port_t ref)
{
if (ref == __mach_task_self ())
return 1;
if (__USEPORT (AUTH, ref == port))
return 1;
return 0;
}
kern_return_t
_S_msg_add_auth (mach_port_t me,
auth_t addauth)
{
error_t err;
auth_t newauth;
if (err = __USEPORT (AUTH,
__auth_makeauth (port,
&addauth, MACH_MSG_TYPE_MOVE_SEND, 1,
NULL, 0,
NULL, 0,
NULL, 0,
NULL, 0,
&newauth)))
return err;
err = __setauth (newauth);
__mach_port_deallocate (__mach_task_self (), newauth);
if (err)
return errno;
return 0;
}
kern_return_t
_S_msg_del_auth (mach_port_t me,
task_t task,
intarray_t uids, mach_msg_type_number_t nuids,
intarray_t gids, mach_msg_type_number_t ngids)
{
error_t err;
auth_t newauth;
if (!_hurd_refport_secure_p (task))
return EPERM;
HURD_CRITICAL_BEGIN;
__mutex_lock (&_hurd_id.lock);
err = _hurd_check_ids ();
if (!err)
{
size_t i, j;
size_t nu = _hurd_id.gen.nuids, ng = _hurd_id.gen.ngids;
uid_t newu[nu];
gid_t newg[ng];
memcpy (newu, _hurd_id.gen.uids, nu * sizeof (uid_t));
memcpy (newg, _hurd_id.gen.gids, ng * sizeof (gid_t));
for (j = 0; j < nuids; ++j)
{
const uid_t uid = uids[j];
for (i = 0; i < nu; ++i)
if (newu[i] == uid)
/* Move the last uid into this slot, and decrease the
number of uids so the last slot is no longer used. */
newu[i] = newu[--nu];
}
__vm_deallocate (__mach_task_self (),
(vm_address_t) uids, nuids * sizeof (uid_t));
for (j = 0; j < ngids; ++j)
{
const gid_t gid = gids[j];
for (i = 0; i < nu; ++i)
if (newu[i] == gid)
/* Move the last gid into this slot, and decrease the
number of gids so the last slot is no longer used. */
newu[i] = newu[--nu];
}
__vm_deallocate (__mach_task_self (),
(vm_address_t) gids, ngids * sizeof (gid_t));
err = __USEPORT (AUTH, __auth_makeauth
(port,
NULL, MACH_MSG_TYPE_COPY_SEND, 0,
newu, nu,
_hurd_id.aux.uids, _hurd_id.aux.nuids,
newg, ng,
_hurd_id.aux.uids, _hurd_id.aux.ngids,
&newauth));
}
__mutex_unlock (&_hurd_id.lock);
HURD_CRITICAL_END;
if (err)
return err;
err = __setauth (newauth);
__mach_port_deallocate (__mach_task_self (), newauth);
if (err)
return errno;
return 0;
}
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