1: /* Copyright (C) 1993, 1994, 1995, 1997 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, write to the Free
   16:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   17:    02111-1307 USA.  */
   18: 
   19: #include <hurd.h>
   20: #include <hurd/id.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
   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:   (void) &init_id;              /* Avoid "defined but not used" warning.  */
   90: }
   91: text_set_element (_hurd_preinit_hook, init_id);