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Roland McGrath
1995-02-18 01:27:10 +00:00
commit 28f540f45b
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hurd/hurdid.c Normal file
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/* Copyright (C) 1993, 1994, 1995 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#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);