[PATCH] chg: handle EOF reading data block

[Jun Wu]

Excerpts from Yuya Nishihara's message of 2016-07-19 22:29:55 +0900:
> It's datagram socket (e.g. UDP).

You are right. I should have checked commandserver is using SOCK_STREAM and
unaffected.  Now we can treat an empty response as an error.

> Yeah, I have that patch to make commandserver channels thread safe. Do you
> have any extensions that can share ui across threads?

We have some "daemonize" code that use processes to build or rearrange cache
in the background. I think we may want some standard "daemonize" code in
util to make sure stdios are closed.