Asynchronous subprocess handling in bash

bash-asynch.sh

set -euo pipefail

exitHandler(){
    echo ""
    echo "script failed"
    trap - SIGTERM && kill 0
}

trap exitHandler USR1 SIGINT SIGTERM EXIT
#(sleep 4; kill -USR1 $$) &
(sleep 3 && kill -USR1 $$) &
(sleep 4 ) &
wait

exitHandler(){
    echo "Success"
}