Trapping signals / awk, without leaning toothpicks

trapping.sh

#!/bin/bash

function shutdown {
     echo "Shutting down $PROGRAM"
     local -r QUIT="SIGQUIT"
     # TODO - What is the process is not found?
     local -r PID="$(ps aux | awk '( $0 ~ "/usr/bin/clickhouse-server" ) {print $2}')"
     echo "pid: $PID"
     #kill -s 3 "$PID"
     echo "Done killing"
}

trap shutdown EXIT

echo "sleeping..."
sleep 3600