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91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/* Copyright (C) 1993-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <hurd.h>
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#include <hurd/id.h>
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struct hurd_id_data _hurd_id;
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/* Check that _hurd_id.{gen,aux} are valid and update them if not.
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Expects _hurd_id.lock to be held and does not release it. */
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error_t
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_hurd_check_ids (void)
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{
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if (! _hurd_id.valid)
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{
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inline void dealloc (__typeof (_hurd_id.gen) *p)
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{
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if (p->uids)
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{
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__vm_deallocate (__mach_task_self (),
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(vm_address_t) p->uids,
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p->nuids * sizeof (uid_t));
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p->uids = NULL;
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}
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p->nuids = 0;
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if (p->gids)
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{
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__vm_deallocate (__mach_task_self (),
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(vm_address_t) p->gids,
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p->ngids * sizeof (gid_t));
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p->gids = NULL;
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}
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p->ngids = 0;
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}
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error_t err;
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dealloc (&_hurd_id.gen);
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dealloc (&_hurd_id.aux);
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if (_hurd_id.rid_auth != MACH_PORT_NULL)
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{
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__mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth);
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_hurd_id.rid_auth = MACH_PORT_NULL;
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}
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if (err = __USEPORT (AUTH, __auth_getids
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(port,
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&_hurd_id.gen.uids, &_hurd_id.gen.nuids,
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&_hurd_id.aux.uids, &_hurd_id.aux.nuids,
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&_hurd_id.gen.gids, &_hurd_id.gen.ngids,
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&_hurd_id.aux.gids, &_hurd_id.aux.ngids)))
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return err;
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_hurd_id.valid = 1;
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}
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return 0;
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}
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static void
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init_id (void)
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{
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__mutex_init (&_hurd_id.lock);
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_hurd_id.valid = 0;
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_hurd_id.rid_auth = MACH_PORT_NULL;
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_hurd_id.gen.uids = _hurd_id.aux.uids = NULL;
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_hurd_id.gen.nuids = _hurd_id.aux.nuids = 0;
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_hurd_id.gen.gids = _hurd_id.aux.gids = NULL;
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_hurd_id.gen.ngids = _hurd_id.aux.ngids = 0;
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(void) &init_id; /* Avoid "defined but not used" warning. */
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}
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text_set_element (_hurd_preinit_hook, init_id);
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