#!/bin/bash
state="$3"
intf="$2"
[ -n "$state" -a -n "$intf" ] || exit 1

vrrp_dir=/var/state/vrrp_state

echo "$state" > $vrrp_dir/"$intf"

if grep -q "BACKUP\|MASTER" $vrrp_dir/*; then
  if grep -q "BACKUP" $vrrp_dir/*; then
    global="BACKUP"
  else
    global="MASTER"
  fi
else
  if grep -q "INIT" $vrrp_dir/*; then
    global="INIT"
  else
    global="FAULT"
  fi
fi

# we can write this state so that other processes can check it
echo "$global" > $vrrp_dir/.global

lcddev=/dev/lcd
hname="$(/bin/uname -n)"
hname="${hname%%.*}"
[ -c "$lcddev" ] || exit 0
exec 2>/dev/null

# write the state on the LCD panel
if [ "$global" = "MASTER" ]; then
  echo -e "\e[H\e[2J${hname}\nVRRP MASTER" >$lcddev
elif [ "$global" = "BACKUP" ]; then
  echo -e "\e[H\e[2J${hname}\nVRRP BACKUP" >$lcddev
elif [ "$global" = "INIT" ]; then
  echo -e "\e[H\e[2J${hname}\nVRRP INIT" >$lcddev
elif [ "$global" = "FAULT" ]; then
  echo -e "\e[H\e[2J${hname}\nVRRP FAULT" >$lcddev
else
  :
fi
exit 0