Running code when a script exits

Questions & Help Questions
20

Alternatively, we could move System.stop() to the callback:

defmodule QuitScript do
  @behaviour :gen_event

  def init(_), do: {:ok, nil}
  def handle_event(:sigquit, _state), do: System.stop()
  def handle_event(signal, state), do: :erl_signal_handler.handle_event(signal, state)
  def handle_call(_, state), do: {:ok, :ok, state}

  def terminate(_reason, _state) do
    IO.puts("My exit code")
  end
end

:gen_event.swap_handler(:erl_signal_server, {:erl_signal_handler, []}, {QuitScript, []})

Looks more natural to me this way, though in the previous example the order in which the custom code runs is more obvious.