A snippet to showcase how to trap and control signals in Bash

catchsig.sh

#!/bin/bash
main()
{
	echo "PID: $$"
	for s in SIGHUP SIGINT SIGQUIT SIGTERM EXIT; do
		if [ SIGTERM = $s ]; then
			trap "echo '$s is caught'; exit" $s
		else
			trap "echo '$s is caught'" $s
		fi
	done
	for i in {1..60}; do
		echo $i
		sleep 1
	done
}

main