/* Access to hardware i/o ports.  Hurd/x86 version.   Copyright (C) 2002 Free Software Foundation, Inc.   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <sys/io.h>#include <hurd.h>#include <mach/i386/mach_i386.h>intioperm (unsigned long int from, unsigned long int num, int turn_on){#if ! HAVE_I386_IO_PERM_MODIFY  return __hurd_fail (ENOSYS);#else  error_t err;  device_t devmaster;  /* With the device master port we get a capability that represents     this range of io ports.  */  err = __get_privileged_ports (NULL, &devmaster);  if (! err)    {      io_perm_t perm;      err = __i386_io_perm_create (devmaster, from, from + num - 1, &perm);      __mach_port_deallocate (__mach_task_self (), devmaster);      if (! err)	{	  /* Now we add or remove that set from our task's bitmap.  */	  err = __i386_io_perm_modify (__mach_task_self (), perm, turn_on);	  __mach_port_deallocate (__mach_task_self (), perm);	}      if (err == MIG_BAD_ID)	/* Old kernels don't have these RPCs.  */	err = ENOSYS;    }  return err ? __hurd_fail (err) : 0;#endif}