hurd/ports-get.c

   1 /* Copyright (C) 1994, 1995, 1996, 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 static error_t
  22 getbootstrap (mach_port_t *result)
  23 {
  24   return __task_get_special_port (__mach_task_self (),
  25                                   TASK_BOOTSTRAP_PORT,
  26                                   result);
  27 }
  28
  29 error_t (*_hurd_ports_getters[INIT_PORT_MAX]) (mach_port_t *result) =
  30   {
  31     [INIT_PORT_BOOTSTRAP] = getbootstrap,
  32   };
  33
  34 error_t
  35 _hurd_ports_get (unsigned int which, mach_port_t *result)
  36 {
  37   if (which >= _hurd_nports)
  38     return EINVAL;
  39   if (which >= INIT_PORT_MAX || _hurd_ports_getters[which] == NULL)
  40     return HURD_PORT_USE (&_hurd_ports[which],
  41                           (*result = port) == MACH_PORT_NULL ? 0
  42                           : __mach_port_mod_refs (__mach_task_self (),
  43                                                   port, MACH_PORT_RIGHT_SEND,
  44                                                   +1));
  45   return (*_hurd_ports_getters[which]) (result);
  46 }