From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- hurd/hurdid.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 hurd/hurdid.c (limited to 'hurd/hurdid.c') diff --git a/hurd/hurdid.c b/hurd/hurdid.c new file mode 100644 index 0000000000..6f1c977cc8 --- /dev/null +++ b/hurd/hurdid.c @@ -0,0 +1,91 @@ +/* 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 +#include + +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); -- cgit 1.4.1