From: Ema Fuma <emanuelef@...>
Date: 2008-06-16T03:00:04+09:00
Subject: Re: Timeout lengthy external executable


> require 'rubygems'
> require 'systemu'

Thanks, with that it worked perfectly!

> you cannot do this on windows safely.  if you are on *nix you can
> easily parse in realtime using the open4 lib, which is much more
> powerful than systemu.  however, only systemu is cross platform.

Yes, I tried systemu and work exactly as you explained.
Yes, for me it would be better to have my script cross-platform 
(providing for each OS the compiled executables to launch).
With IO.popen I was able to parse at run-time line by line the stdout 
like this:

           IO.popen(command) do |pipe|
        pipe.each("\n") do |line|
        puts line
      end

And it's working (Windows and OSX), the only problem I had was that 
timeout(10) wasn't ignored.
Now what I want to achieve by the run-time parsing are two things:
- display a progess of what is happening
- check that the process keeps writing on stdout, so I know it's still 
alive. If it doesn't for 10 sec. exit the entire program.

Is that possible?

Thanks a lot again for your kindness!

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