gistfile1.sh

#!/usr/bin/bash

shopt -s dotglob nullglob

# returns true if empty, false otherwise
is_empty_dir() {
  set - "echo $1/*"
    test -z "$1"
    }

#if [ "$is_empty_dir(/media/btrfs)" ]; then
if [ "$is_empty_dir(/home/roey/emptydir/)" ]; then

    echo "/media/btrfs is empty!"
    exit 1
  else
    echo "/media/btrfs is NOT empty!"
    exit 0
  fi