usr bin env bash function usage echo -e Usage echo -e -a Alert echo -e

#!/usr/bin/env bash

function usage() {
    echo -e "Usage:";
    echo -e "\t$0 -a - Alert";
    echo -e "\t$0 -v - Verbose mode";
    echo -e "\t$0 -h - Show this help";
}

while getopts "avh" opt;
do
    case $opt in
        a)
            PARAM_A="PARAM_A";
            ;;
        v)
            PARAM_V="PARAM_V";
            ;;
        h)
            usage;
            exit 0;
            ;;
        *)
            usage;
            exit 1;
            ;;
    esac
done

test -z "$PARAM_A" && test -z "$PARAM_V" && {
    echo "You should not pass!";
    usage;
    exit 2;
}

test -n "${PARAM_V}" && echo -e "Beep!";
test -n "${PARAM_A}" && echo -en "\a";

exit 0;