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glibc/hurd/hurdid.c
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/* Copyright (C) 1993-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <hurd.h> | |
#include <hurd/id.h> | |
struct hurd_id_data _hurd_id; | |
/* Check that _hurd_id.{gen,aux} are valid and update them if not. | |
Expects _hurd_id.lock to be held and does not release it. */ | |
error_t | |
_hurd_check_ids (void) | |
{ | |
if (! _hurd_id.valid) | |
{ | |
inline void dealloc (__typeof (_hurd_id.gen) *p) | |
{ | |
if (p->uids) | |
{ | |
__vm_deallocate (__mach_task_self (), | |
(vm_address_t) p->uids, | |
p->nuids * sizeof (uid_t)); | |
p->uids = NULL; | |
} | |
p->nuids = 0; | |
if (p->gids) | |
{ | |
__vm_deallocate (__mach_task_self (), | |
(vm_address_t) p->gids, | |
p->ngids * sizeof (gid_t)); | |
p->gids = NULL; | |
} | |
p->ngids = 0; | |
} | |
error_t err; | |
dealloc (&_hurd_id.gen); | |
dealloc (&_hurd_id.aux); | |
if (_hurd_id.rid_auth != MACH_PORT_NULL) | |
{ | |
__mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth); | |
_hurd_id.rid_auth = MACH_PORT_NULL; | |
} | |
if (err = __USEPORT (AUTH, __auth_getids | |
(port, | |
&_hurd_id.gen.uids, &_hurd_id.gen.nuids, | |
&_hurd_id.aux.uids, &_hurd_id.aux.nuids, | |
&_hurd_id.gen.gids, &_hurd_id.gen.ngids, | |
&_hurd_id.aux.gids, &_hurd_id.aux.ngids))) | |
return err; | |
_hurd_id.valid = 1; | |
} | |
return 0; | |
} | |
static void | |
init_id (void) | |
{ | |
__mutex_init (&_hurd_id.lock); | |
_hurd_id.valid = 0; | |
_hurd_id.rid_auth = MACH_PORT_NULL; | |
_hurd_id.gen.uids = _hurd_id.aux.uids = NULL; | |
_hurd_id.gen.nuids = _hurd_id.aux.nuids = 0; | |
_hurd_id.gen.gids = _hurd_id.aux.gids = NULL; | |
_hurd_id.gen.ngids = _hurd_id.aux.ngids = 0; | |
(void) &init_id; /* Avoid "defined but not used" warning. */ | |
} | |
text_set_element (_hurd_preinit_hook, init_id); |