bash_background_redirection_example.sh

#!/bin/bash

on_exit() {
	echo "#Exited unexpectidly"
	zenity --display=:0 --error --text="Program has exited unexpectidly!"
}

exec &> >(zenity --display=:0 --progress --title 'Redirection example' --text 'Running...' --auto-close)

trap "on_exit" EXIT

for i in $(seq 1 100); do
	echo $i
	echo "#Running... $i%"
	sleep 0.1
	if [ $i == 50 ]; then
		exit 42
	fi
done