From: Sean Slavik <lists@...>
Date: 2012-09-07T01:03:48+09:00
Subject: Passing Sockets (or other FDs) to target of Exec()

I've been playing around with an issue that is giving me a bit of a
headache and I'm hoping someone can point me in a more useful
direction...

On a standard startup, I have two variables:

$nCS = TCPServer.new(HOST, PORT)
$connected = Array.new

As users connect to $nCS and login, their connection (and user data) is
passed to $connected.

I have a command that triggers a function "copyover" that is intended to
hot-reboot the server, hopefully maintaining the connections. While I've
tried writing the connections to a file and reloading them that way, the
closest I seem to have gotten is the following:

exec "./main.rb", "--copyover", *$nCS, *$connected

Then passing:

$nCS = ARGV[1]
$connected = ARGV[2]

Since Exec replaces the process, it should maintain the files until the
process is destroyed, correct?

However, this still tells me "ERROR: Caught error in Client Thread:
Socket is not connected"

Can anyone point me in the right direction on this? I'm stumped!

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