#!/bin/bash

main(){
  local device_name=$1
  local new_name=$1

  if [[ -e /sys/block/$device_name/dm/name ]] ; then
    name_file=$(cat /sys/block/$device_name/dm/name)
  elif [[ -e /sys/class/block/$device_name/dm/name ]] ; then
    name_file=$(cat /sys/class/block/$device_name/dm/name)
  elif [[ -e /sys/devices/virtual/block/$device_name/dm/name ]] ; then
    name_file=$(cat /sys/devices/virtual/block/$device_name/dm/name)
  fi

  echo $name_file
}

main $1

unset main
