/* Copyright (C) 1991-2018 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, see

   <http://www.gnu.org/licenses/>.  */

#include <unistd.h>

#include <hurd.h>

#include "hurdhost.h"

/* Return the current machine's Internet number.  */

long int

gethostid (void)

{

  /* The hostid is just the contents of the file /etc/hostid,

     kept as text of hexadecimal digits.  */

  /* XXX this is supposed to come from the hardware serial number */

  char buf[8];

  ssize_t n = _hurd_get_host_config ("/etc/hostid", buf, sizeof buf);

  if (n < 0)

    return -1;

  return strtol (buf, NULL, 16);

}