mach/bootprivport.c

   1 /* Copyright (C) 1993 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
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <mach.h>
  20
  21 kern_return_t
  22 __mach_get_priv_ports (mach_port_t *host_priv_ptr,
  23                        mach_port_t *device_master_ptr)
  24 {
  25   kern_return_t err;
  26   mach_port_t bootstrap, reply;
  27
  28   struct
  29     {
  30       mach_msg_header_t hdr;
  31       mach_msg_type_t host_priv_type;
  32       mach_port_t host_priv;
  33       mach_msg_type_t dev_master_type;
  34       mach_port_t dev_master;
  35     } msg;
  36
  37   if (err = task_get_bootstrap_port (mach_task_self (), &bootstrap))
  38     return err;
  39
  40   /* We cannot simply use a MiG-generated user stub to do this,
  41      because the return message does not contain a return code datum.  */
  42   reply = __mach_reply_port ();
  43   msg.hdr.msgh_bits = MACH_MSGH_BITS (MACH_MSG_TYPE_COPY_SEND,
  44                                       MACH_MSG_TYPE_MAKE_SEND_ONCE);
  45   msg.hdr.msgh_size = 0;
  46   msg.hdr.msgh_remote_port = bootstrap;
  47   msg.hdr.msgh_local_port = reply;
  48   msg.hdr.msgh_kind = MACH_MSGH_KIND_NORMAL;
  49   msg.hdr.msgh_id = 999999;
  50   err = __mach_msg (&msg.hdr,
  51                     MACH_SEND_MSG|MACH_RCV_MSG|MACH_RCV_TIMEOUT,
  52                     sizeof (msg.hdr), sizeof (msg), reply,
  53                     500, MACH_PORT_NULL); /* XXX timeout is arbitrary */
  54   mach_port_deallocate (mach_task_self (), bootstrap);
  55   mach_port_deallocate (mach_task_self (), reply);
  56
  57   if (err == KERN_SUCCESS)
  58     {
  59       *host_priv_ptr = msg.host_priv;
  60       *device_master_ptr = msg.dev_master;
  61     }
  62
  63   return err;
  64 }