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131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
/* Copyright (C) 1991, 1992, 1993, 1994, 1995 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <hurd.h>
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#include <hurd/msg_server.h>
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#include <hurd/id.h>
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#include <string.h>
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int
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_hurd_refport_secure_p (mach_port_t ref)
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{
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if (ref == __mach_task_self ())
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return 1;
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if (__USEPORT (AUTH, ref == port))
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return 1;
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return 0;
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}
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kern_return_t
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_S_msg_add_auth (mach_port_t me,
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auth_t addauth)
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{
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error_t err;
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auth_t newauth;
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if (err = __USEPORT (AUTH,
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__auth_makeauth (port,
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&addauth, 1, MACH_MSG_TYPE_MOVE_SEND,
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NULL, 0,
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NULL, 0,
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NULL, 0,
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NULL, 0,
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&newauth)))
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return err;
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err = __setauth (newauth);
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__mach_port_deallocate (__mach_task_self (), newauth);
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if (err)
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return errno;
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return 0;
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}
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kern_return_t
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_S_msg_del_auth (mach_port_t me,
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task_t task,
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intarray_t uids, mach_msg_type_number_t nuids,
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intarray_t gids, mach_msg_type_number_t ngids)
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{
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error_t err;
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auth_t newauth;
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if (!_hurd_refport_secure_p (task))
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return EPERM;
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HURD_CRITICAL_BEGIN;
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__mutex_lock (&_hurd_id.lock);
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err = _hurd_check_ids ();
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if (!err)
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{
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size_t i, j;
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size_t nu = _hurd_id.gen.nuids, ng = _hurd_id.gen.ngids;
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uid_t newu[nu];
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gid_t newg[ng];
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memcpy (newu, _hurd_id.gen.uids, nu * sizeof (uid_t));
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memcpy (newg, _hurd_id.gen.gids, ng * sizeof (gid_t));
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for (j = 0; j < nuids; ++j)
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{
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const uid_t uid = uids[j];
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for (i = 0; i < nu; ++i)
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if (newu[i] == uid)
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/* Move the last uid into this slot, and decrease the
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number of uids so the last slot is no longer used. */
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newu[i] = newu[--nu];
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}
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__vm_deallocate (__mach_task_self (),
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(vm_address_t) uids, nuids * sizeof (uid_t));
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for (j = 0; j < ngids; ++j)
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{
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const gid_t gid = gids[j];
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for (i = 0; i < nu; ++i)
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if (newu[i] == gid)
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/* Move the last gid into this slot, and decrease the
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number of gids so the last slot is no longer used. */
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newu[i] = newu[--nu];
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}
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__vm_deallocate (__mach_task_self (),
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(vm_address_t) gids, ngids * sizeof (gid_t));
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err = __USEPORT (AUTH, __auth_makeauth
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(port,
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NULL, 0, MACH_MSG_TYPE_COPY_SEND,
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newu, nu,
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_hurd_id.aux.uids, _hurd_id.aux.nuids,
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newg, ng,
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_hurd_id.aux.uids, _hurd_id.aux.ngids,
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&newauth));
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}
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__mutex_unlock (&_hurd_id.lock);
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HURD_CRITICAL_END;
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if (err)
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return err;
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err = __setauth (newauth);
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__mach_port_deallocate (__mach_task_self (), newauth);
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if (err)
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return errno;
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return 0;
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}
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