pre_upgrade() {
startelfmd5="$(md5sum /boot/start.elf| awk '{print $1}')"

for file in /boot/*.elf; do

        if [ $file != /boot/start.elf ]
        then
                currentmd5="$(md5sum $file| awk '{print $1}')"

                if [ "$currentmd5"  == "$startelfmd5" ]
                then
                echo "$file" > /tmp/rpifirmware.txt
		echo " >>>Current installed start.elf: $file"
                fi
        fi
done


}


post_upgrade() {

if [ -e /tmp/rpifirmware.txt ]
	then
	firmwarename=$(head -n 1 /tmp/rpifirmware.txt)
	if [ -e "$firmwarename" ]
	then
	echo " >>>Replacing /boot/start.elf with $firmwarename"
	cp $firmwarename /boot/start.elf
	fi
fi
}