Erlang escript + signal handling

gistfile1.txt

$ ./main.sh 
erl: started.
erl: working...
erl: working...
erl: working...
^Cerl: working...
erl: stopped.

main.es

#!/usr/bin/env escript

-export([
    main/1
]).

main([Node, Cookie]) ->
    {ok, _} = net_kernel:start([list_to_atom(Node), shortnames]),
    true = erlang:set_cookie(node(), list_to_atom(Cookie)),
    Self = self(),
    Worker = spawn(fun() -> loop(Self) end),
    true = register(worker, Worker),
    io:format("erl: started.~n"),
    receive
        {stopped, Worker} ->
            io:format("erl: stopped.~n")
    after infinity ->
        ok
    end.

loop(Notifee) ->
    io:format("erl: working...~n"),
    receive
        stop ->
            Notifee ! {stopped, self()},
            ok
    after
        1000 ->
            loop(Notifee)
    end.

main.sh

#!/bin/bash

node=${RANDOM}
host=$(hostname)
cookie=test

function notify_erl {
    erl -sname ${RANDOM} -setcookie ${cookie} -noshell -eval "{worker, '"${node}@${host}"'} ! stop, halt(0)."
    exit 1
}

trap notify_erl SIGHUP SIGINT SIGTERM

./main.es ${node} ${cookie} &

while true; do sleep 1; done