#!/bin/bash

currentUser=$(/bin/ls -la /dev/console | /usr/bin/cut -d' ' -f4)

# Makes sure a user is logged in
if [[ "${currentUser}" != "" && "${currentUser}" != "root" ]]; then
    echo "${currentUser}"
    su - "${currentUser}" -c 'read -r q _ < <(/usr/bin/brctl quota); [ -n "$q" ] || exit 0; f=$(echo "scale=2; $q/1024^3" | /usr/bin/bc -l); echo "$f GB"'
else
    echo 'No logged-in user detected.'
    exit 1
fi