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1/* Copyright (C) 1993-2019 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
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.
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
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#include <hurd.h>
19#include <hurd/id.h>
20
21/* Set the uid set for the current user to UIDS (N of them). */
22int
23seteuids (int n, const uid_t *uids)
24{
25 error_t err;
26 auth_t newauth;
27 int i;
28 gid_t new[n];
29
30 /* Fault before taking locks. */
31 for (i = 0; i < n; ++i)
32 new[i] = uids[i];
33
34 HURD_CRITICAL_BEGIN;
35 __mutex_lock (&_hurd_id.lock);
36 err = _hurd_check_ids ();
37 if (! err)
38 {
39 /* Get a new auth port using those IDs. */
40 err = __USEPORT (AUTH,
41 __auth_makeauth (port, NULL, 0, 0,
42 new, n,
43 _hurd_id.aux.uids, _hurd_id.aux.nuids,
44 _hurd_id.gen.gids, _hurd_id.gen.ngids,
45 _hurd_id.aux.gids, _hurd_id.aux.ngids,
46 &newauth));
47 }
48 __mutex_unlock (&_hurd_id.lock);
49 HURD_CRITICAL_END;
50
51 if (err)
52 return __hurd_fail (err);
53
54 /* Install the new auth port and reauthenticate everything. */
55 err = __setauth (newauth);
56 __mach_port_deallocate (__mach_task_self (), newauth);
57 return err;
58}
59

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