From: Ken Bloom <kbloom@...>
Date: 2008-10-23T09:39:09+09:00
Subject: Re: Block method to yield stdout?

On Mon, 20 Oct 2008 13:19:56 -0500, List.rb wrote:

> All, I've written a distribution service that spawns processes using
> IO.popen in a seperate thread for each job.
> 
> In my Task class, I would like to create a block method such as
> 'Task.monitor(mode="stdout")', which would yield the stdout for that
> task from that point forward. -- similar to tail -f, but for a
> multithreaded environment.
> 
> The result would in essence be called like:
> 
> task = Task.new(:cmd => "tail -f /some/log") sleep 10
> task.monitor
> # fresh content from some/log will be yielded
> 
> 
> Since $stdout is global, what would be the beat way tackle this?

Maybe use Open3, or popen. Worst case, look at how Open3 does a fork/exec 
to call the appropriate program.

--Ken

-- 
Chanoch (Ken) Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/