/* Copyright (C) 1992,94,97,2001,02 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 <errno.h>#include <sys/socket.h>#include <hurd.h>#include <hurd/fd.h>#include <hurd/socket.h>#include <string.h>/* Put the current value for socket FD's option OPTNAME at protocol level LEVEL   into OPTVAL (which is *OPTLEN bytes long), and set *OPTLEN to the value's   actual length.  Returns 0 on success, -1 for errors.  *//* XXX should be __getsockopt ? */intgetsockopt (int fd,	    int level,	    int optname,	    void *optval,	    socklen_t *optlen){  error_t err;  char *buf = optval;  mach_msg_type_number_t buflen = *optlen;  if (err = HURD_DPORT_USE (fd, __socket_getopt (port,						 level, optname,						 &buf, &buflen)))    return __hurd_dfail (fd, err);  if (*optlen > buflen)    *optlen = buflen;  if (buf != optval)    {      memcpy (optval, buf, *optlen);      __vm_deallocate (__mach_task_self (), (vm_address_t) buf, buflen);    }  return 0;}