From: Tim Pease <tim.pease@...>
Date: 2007-09-29T23:43:14+09:00
Subject: Re: trapping TERM in a daemonized (Daemon gem) script

On 9/28/07, Dean Holdren <deanholdren@gmail.com> wrote:
> I'm using the Daemon gem, and I'd like to trap the TERM signal so that
> I can have graceful termination of my main execution loop:
>
> $running = true;
> Signal.trap("TERM") do
>   $running = false
> end
>
> while($running) do
>   #some operations that could take a few seconds
>   sleep(5)
> end
>
> However, I get some memory errors when I stop the process, and I can
> sometimes get an extra process after a 'restart' is issued, that I
> can't kill with a 'stop'
>
> I looked at the source to the Daemon gem, and it warns not to trap the
> TERM signal in your script. So how can I gracefully end my loop if I
> don't trap TERM?
>

You can trap any signal and use that to terminate your script.  Try
the interrupt signal.

Signal.trap('INT') do
end

To send this to your daemon process on a *NIX host ...

kill -SIGINT pid


Blessings,
TwP