hurd/privports.c

   1 /* Copyright (C) 1993, 1994, 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <hurd.h>
  20
  21 /* The program might set these if it is the initial task
  22    bootstrapped by the microkernel.  */
  23
  24 mach_port_t _hurd_host_priv, _hurd_device_master;
  25
  26
  27 kern_return_t
  28 get_privileged_ports (host_priv_t *host_priv_ptr, device_t *device_master_ptr)
  29 {
  30   if (! _hurd_host_priv)
  31     {
  32       error_t err;
  33
  34       if (_hurd_ports)
  35         /* We have gotten some initial ports, so perhaps
  36            we have a proc server to talk to.  */
  37         err = __USEPORT (PROC, __proc_getprivports (port,
  38                                                     &_hurd_host_priv,
  39                                                     &_hurd_device_master));
  40       else
  41         return MACH_SEND_INVALID_DEST;
  42
  43       if (err)
  44         return err;
  45     }
  46
  47   if (host_priv_ptr)
  48     {
  49       mach_port_mod_refs (mach_task_self (),
  50                           _hurd_host_priv, MACH_PORT_RIGHT_SEND, 1);
  51       *host_priv_ptr = _hurd_host_priv;
  52     }
  53   if (device_master_ptr)
  54     {
  55       mach_port_mod_refs (mach_task_self (),
  56                           _hurd_device_master, MACH_PORT_RIGHT_SEND, 1);
  57       *device_master_ptr = _hurd_device_master;
  58     }
  59   return KERN_SUCCESS;
  60 }