hurd/ports-get.c

   1 /* Copyright (C) 1994, 1995, 1996 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 <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 }