#!/usr/bin/env bash

if [ "$#" -ne 1 ]; then
    echo -e >&2 "\x1B[1;31merror:\x1B[0;1m this program expects one argument\x1B[0m"
    echo -e >&2 "\x1B[1;33musage:\x1B[0;1m sudo lumount <mount point>"

    exit 1
fi

if [ "$USER" != "root" ]; then
    echo -e >&2 "\x1B[1;31merror:\x1B[0;1m this program must be run as root\x1B[0m"
    echo -e >&2 "\x1B[1;33musage:\x1B[0;1m sudo lumount <mount point>"

    exit 1
fi

# Mounts an encrypt external drive to a specified mount point
umount $1
cryptsetup luksClose external