VeraCrypt volume (secure) mounting via GUI

veracrypt_mount.sh

#!/bin/bash

DEVICE=/dev/sda1
IMAGE_PATH='/media/$1/Storage/.veracrypt/volume'
MOUNT_PATH='/mnt/volume'

if [[ "$USER" != "root" ]]; then
  gvfs-mount -d $DEVICE
  gksu -D $(basename $0) $0 $USER
  exit $?
fi

test -z "$1" && exit 1

IMAGE_PATH=$(eval echo $IMAGE_PATH)
MOUNT_PATH=$(eval echo $MOUNT_PATH)
veracrypt -t -l "${IMAGE_PATH}" 1> /dev/null 2>&1 

if [ "$?" -eq 1 ]; then
  PWD=$(zenity --password --title="Unlock Volume")
  test -z "$PWD" && exit 0
  veracrypt -t ${IMAGE_PATH} ${MOUNT_PATH} --mount --non-interactive --stdin <<< "$PWD"

  # Old (insecure) method
  #veracrypt -t ${IMAGE_PATH} ${MOUNT_PATH} --mount --non-interactive -p "$PWD"

  test "$?" -eq 0 \
    && zenity --info --title "Mount Volume" --text "Successfully mounted the encrypted volume." \
    || zenity --error --title "Mount Volume" --text "Failed to mount the encrypted volume." 
else
  zenity --warning --title "Mount Volume" --text "The volume is already mounted."
fi