file.ex

  @doc """
  Get list of files and directories in `dir`.
  """
  def listdir(dir) do
    F.list_dir(dir)
  end

  @doc """
  Get list of files and directories in `dir`.

  Raises File.Error in case of an error.
  """
  def listdir!(dir) do
    case F.list_dir(dir) do
      { :ok, files } -> files
      { :error, reason } ->
        raise File.Error, reason: reason, action: "list directory", path: :unicode.characters_to_binary(dir)
    end
  end

Muchas Gracias!