From: Junio C Hamano <gitster@pobox.com>
Date: Thu, 29 Sep 2016 21:17:25 GMT
Subject: Re: [PATCH v8 00/11] Git filter protocol
Message-ID: <xmqqfuoie78a.fsf@gitster.mtv.corp.google.com>
In-Reply-To: <f9a6dd02-34c0-d48b-3cbc-73202488920c@gmail.com>

Jakub Narębski <jnareb@gmail.com> writes:

> Or even better: make filter driver write its pid to pidfile, and then
> "wait $(cat rot13-filter.pid)".  That's what we do in lib-git-daemon.sh
> (I think).

I am not sure if "wait"ing on a random process that is not a direct
child is a reasonable thing to do, but I like the direction.

Communicate with a pidfile and wait until "kill -0 $that_pid" fails,
or something like that, would be clean enough.