clean exit in bash

cleanInterrupt.sh

#!/bin/sh

# How To Die Gracefully

cleanup() {
	echo clean up…
}

die() {
	echo dying gracefully
	kill $proc
	exit 0
}

bg(){
	while :; do
		echo bla
		sleep 3
	done
}

trap cleanup EXIT
trap die INT

bg&
proc=$!

while :; do
	echo blubb
	sleep 13
done