#!/bin/sh

N=$1

if which opendiff > /dev/null 2>&1; then
  TOOL="opendiff"
elif which tkdiff > /dev/null 2>&1; then
  TOOL="tkdiff -b -B "
else
  TOOL="diff -U 8 -b -B "
fi

${TOOL} firewall${N}.fw.orig firewall${N}.fw