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 |
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 |
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 | |