| 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 | |
|---|
