From: Brian Candler <b.candler@...>
Date: 2011-04-06T17:43:58+09:00
Subject: Re: capture the output of a grandchild

Chandan Bansal wrote in post #991188:
> I tried using named pipes and `` to capture the output but its not
> working

Show your code. Show what B and C are doing, or write replacements in 
ruby to demonstrate.

If you use IO.popen(...) then you will capture stdout of the child; if 
that child forks a grandchild, which inherits the same stdout, then you 
will capture that as well.

Maybe the output which you're failing to capture is on stderr not 
stdout. If so, look at open3.rb in the standard library; or do

IO.popen("/path/to/prog 2>&1") { |io| ... }

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