1 /* Copyright (C) 1993-2022 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 <https://www.gnu.org/licenses/>. */
17
18 #include <hurd.h>
19 #include <hurd/id.h>
20 #include "set-hooks.h"
21
22 struct hurd_id_data _hurd_id;
23
24
25 /* Check that _hurd_id.{gen,aux} are valid and update them if not.
26 Expects _hurd_id.lock to be held and does not release it. */
27
28 error_t
_hurd_check_ids(void)29 _hurd_check_ids (void)
30 {
31 if (! _hurd_id.valid)
32 {
33 inline void dealloc (__typeof (_hurd_id.gen) *p)
34 {
35 if (p->uids)
36 {
37 __vm_deallocate (__mach_task_self (),
38 (vm_address_t) p->uids,
39 p->nuids * sizeof (uid_t));
40 p->uids = NULL;
41 }
42 p->nuids = 0;
43 if (p->gids)
44 {
45 __vm_deallocate (__mach_task_self (),
46 (vm_address_t) p->gids,
47 p->ngids * sizeof (gid_t));
48 p->gids = NULL;
49 }
50 p->ngids = 0;
51 }
52
53 error_t err;
54
55 dealloc (&_hurd_id.gen);
56 dealloc (&_hurd_id.aux);
57
58 if (_hurd_id.rid_auth != MACH_PORT_NULL)
59 {
60 __mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth);
61 _hurd_id.rid_auth = MACH_PORT_NULL;
62 }
63
64 if (err = __USEPORT (AUTH, __auth_getids
65 (port,
66 &_hurd_id.gen.uids, &_hurd_id.gen.nuids,
67 &_hurd_id.aux.uids, &_hurd_id.aux.nuids,
68 &_hurd_id.gen.gids, &_hurd_id.gen.ngids,
69 &_hurd_id.aux.gids, &_hurd_id.aux.ngids)))
70 return err;
71
72 _hurd_id.valid = 1;
73 }
74
75 return 0;
76 }
77
78 static void attribute_used_retain
init_id(void)79 init_id (void)
80 {
81 __mutex_init (&_hurd_id.lock);
82 _hurd_id.valid = 0;
83 _hurd_id.rid_auth = MACH_PORT_NULL;
84 _hurd_id.gen.uids = _hurd_id.aux.uids = NULL;
85 _hurd_id.gen.nuids = _hurd_id.aux.nuids = 0;
86 _hurd_id.gen.gids = _hurd_id.aux.gids = NULL;
87 _hurd_id.gen.ngids = _hurd_id.aux.ngids = 0;
88 }
89 SET_RELHOOK (_hurd_preinit_hook, init_id);
90