Bash Script to handle mounting/unmounting a truecrypt encrypted drive with tcplay

tcmount

#!/bin/bash
losetup -f

while getopts “u” OPTION
do
     case $OPTION in
         u)
             UMOUNT=1
             ;;
     esac
done

if [ ! -n "$UMOUNT" ]; then
  DISKS=`lsblk -d -n |grep disk`
  echo "Available Disks:"
  echo "$DISKS"
  read -p "Which disk to attach? /dev/sd" input
fi

if [ ! -e /dev/mapper/tc ]; then
    if [ ! -n "$UMOUNT" ]; then
        echo "add dmcrypt mapping"
        tcplay -m tc -d /dev/sd$input
    fi
fi

if mount | grep /media/tc > /dev/null; then
    echo "already mounted"
    if [ -n "$UMOUNT" ]; then
       echo -n unmount
       umount /media/tc
       echo " .... done "
    fi
else
    echo "not yet mounted"
    if [ ! -n "$UMOUNT" ]; then
      mount /dev/mapper/tc /media/tc
      echo "now mounted"
    fi
fi

if [ -e /dev/mapper/tc ]; then
    echo "dmcrypt mapping exists"
    if [ -n "$UMOUNT" ]; then
        tcplay -u tc
	echo "removed dmcrypt mapping"
    fi
fi