daniyel

#!/bin/bash

programname=$0

function usage {
    echo "usage: $programname -l folder1 -r folder2 -d folder3 [-e lrd]"
    echo "  -l      folder on the left side"
    echo "  -r      folder on the right side"
    echo "  -d      destination folder"
    echo "  -e      exclude l (left side), r (right side) or d (differ)"