How to kill all processes that were opened by a shell script upon ctrl + C?

Question

I\'ve got a couple python scripts which I start collectively from a shell script as follows:

#!/bin/bash
python prog1.py &
python prog2.py &
python prog3         


        

Answer 1

Let the bash script catch SIGINT, and have it kill everything in the current process group:

intexit() {
    # Kill all subprocesses (all processes in the current process group)
    kill -HUP -$$
}

hupexit() {
    # HUP'd (probably by intexit)
    echo
    echo "Interrupted"
    exit
}

trap hupexit HUP
trap intexit INT

python prog1.py &
python prog2.py &
python prog3.py &

wait