1: /* Copyright (C) 1993, 94, 97, 98 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: /* Set the uid set for the current user to UIDS (N of them).  */
   23: int
   24: seteuids (int n, const uid_t *uids)
   25: {
   26:   error_t err;
   27:   auth_t newauth;
   28:   int i;
   29:   gid_t new[n];
   30: 
   31:   /* Fault before taking locks.  */
   32:   for (i = 0; i < n; ++i)
   33:     new[i] = uids[i];
   34: 
   35:   HURD_CRITICAL_BEGIN;
   36:   __mutex_lock (&_hurd_id.lock);
   37:   err = _hurd_check_ids ();
   38:   if (! err)
   39:     {
   40:       /* Get a new auth port using those IDs.  */
   41:       err = __USEPORT (AUTH,
   42:                        __auth_makeauth (port, NULL, 0, 0,
   43:                                         new, n,
   44:                                         _hurd_id.aux.uids, _hurd_id.aux.nuids,
   45:                                         _hurd_id.gen.gids, _hurd_id.gen.ngids,
   46:                                         _hurd_id.aux.gids, _hurd_id.aux.ngids,
   47:                                         &newauth));
   48:     }
   49:   __mutex_unlock (&_hurd_id.lock);
   50:   HURD_CRITICAL_END;
   51: 
   52:   if (err)
   53:     return __hurd_fail (err);
   54: 
   55:   /* Install the new auth port and reauthenticate everything.  */
   56:   err = __setauth (newauth);
   57:   __mach_port_deallocate (__mach_task_self (), newauth);
   58:   return err;
   59: }