text: /* Copyright (C) 1992,94,97,2001 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 ? */
  int
  getsockopt (fd, level, optname, optval, optlen)
       int fd;
       int level;
       int optname;
       void *optval;
       size_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;
  }
  