#!/bin/sh
################################################################################
#      This file is part of OpenELEC - http://www.openelec.tv
#      Copyright (C) 2009-2012 Stephan Raue (stephan@openelec.tv)
#
#  This Program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2, or (at your option)
#  any later version.
#
#  This Program 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 General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with OpenELEC.tv; see the file COPYING.  If not, write to
#  the Free Software Foundation, 51 Franklin Street, Suite 500, Boston, MA 02110, USA.
#  http://www.gnu.org/copyleft/gpl.html
################################################################################

# Attempts to generate a unique machine ID based on one local MAC address
# MACHINEID SHOULD be the same between upgrades/reinstalls
# MAC is hashed so that it cant be reversed making it anonymous
# Used to help with global usage statistics, also used for dbus and systemd

# creating machine-id, systemd otherwise does this automatically if not present.
# this we want to avoid to have the same machine-id over reboot, fallback
# to systemd's solution if this dont work here

if [ -e "/sys/class/net/eth0/address" ]; then
  MAC_ADRESS=`cat /sys/class/net/eth0/address`
elif [ -e "/sys/class/net/wlan0/address" ]; then
  MAC_ADRESS=`cat /sys/class/net/wlan0/address`
fi

if [ -n "$MAC_ADRESS" ]; then
  MACHINEID=`echo $MAC_ADRESS | md5sum | cut -f1 -d" "`
fi

echo "$MACHINEID" > /run/machine-id