#!/bin/bash
#
# (c) 2006 Pawel Maziarz <drg@secprog.org>, te sprawy..

TIMEOUT=60
tmpdir=tmp
tmpname="tmpischange-`date +'%Y%m%d%H%M%S'`"
mailcmd="mutt -x"
mailto="drg@secprog.org"

usage() {
	echo "usage: $0 <url> [timeout]"
	exit 0
}

if [ ! $1 ]; then
	usage
else
	url="$1"
fi

if [ $2 ]; then
	timeout=$2
else
	timeout=$TIMEOUT
fi

if [ $timeout -lt 1 ]; then
	timeout=$TIMEOUT
fi

echo $url
echo $timeout

file1=$tmpdir/$tmpname-orig
file2=$tmpdir/$tmpname

wget "$url" -O $file1 >/dev/null 2>&1

while [ 1 ]; do
	wget "$url" -O $file2 >/dev/null 2>&1 || continue

	change=`diff $file1 $file2 2>/dev/null` || break

	sleep $timeout
done

echo $change | $mailcmd -s "change $url" $mailto