From: Roger Pack <rogerpack2005@...>
Date: 2009-06-20T03:04:10+09:00
Subject: Re: Capturing System Call Return Values?

Tyler Knappe wrote:
> I'm attempting to use Ruby to make system calls (in this case python
> scripts) which return values, that I then hand off to Ruby on Rails to
> populate a webpage.  However, I've run into a problem with capturing the
> return values of system calls.

appears to be $?, from some google work
http://74.125.155.132/search?q=cache:lNLxDxyXbj4J:www.rubyist.net/~slagell/ruby/globalvars.html+ruby+global+variables&cd=1&hl=en&ct=clnk&gl=us&client=firefox-a
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