hurd/ports-get.c

   1 /* Copyright (C) 1994-2021 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, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <hurd.h>
  19
  20 static error_t
  21 getbootstrap (mach_port_t *result)
  22 {
  23   return __task_get_special_port (__mach_task_self (),
  24                                   TASK_BOOTSTRAP_PORT,
  25                                   result);
  26 }
  27
  28 error_t (*_hurd_ports_getters[INIT_PORT_MAX]) (mach_port_t *result) =
  29   {
  30     [INIT_PORT_BOOTSTRAP] = getbootstrap,
  31   };
  32
  33 error_t
  34 _hurd_ports_get (unsigned int which, mach_port_t *result)
  35 {
  36   if (which >= _hurd_nports)
  37     return EINVAL;
  38   if (which >= INIT_PORT_MAX || _hurd_ports_getters[which] == NULL)
  39     return HURD_PORT_USE (&_hurd_ports[which],
  40                           (*result = port) == MACH_PORT_NULL ? 0
  41                           : __mach_port_mod_refs (__mach_task_self (),
  42                                                   port, MACH_PORT_RIGHT_SEND,
  43                                                   +1));
  44   return (*_hurd_ports_getters[which]) (result);
  45 }