trap

#!/bin/bash

function trap_handler() {
  echo "Caught $1, signalling pilot PID: $pilotpid"
  kill -s $1 $pilotpid
  wait
}

trap 'trap_handler SIGTERM' SIGTERM
trap 'trap_handler SIGQUIT' SIGQUIT
trap 'trap_handler SIGSEGV' SIGSEGV
trap 'trap_handler SIGXCPU' SIGXCPU
trap 'trap_handler SIGUSR1' SIGUSR1
trap 'trap_handler SIGBUS' SIGBUS

sleep 30 &
pilotpid=$!
echo pilotpid: $pilotpid
wait $pilotpid

ps. you can test by sending a signal to the trap.sh process, not the pilotpid. Use pstree -p to get the correct pid.