From: Pito Salas <rps@...>
Date: 2009-08-25T05:29:18+09:00
Subject: Re: Asynchronous process to process pipe IO

Joel VanderWerf wrote:
> Pito Salas wrote:
>>         worker.each_line do |line|
>> iacommand.rb is invoked as a process within ruby. It does a lot of
>> So in other words, how do I asynchronously read from a pipe that is
>> being fed by a process?
> 
> Hm, the following shows output at 1 sec intervals:
> 
> open("|-", "r") do |worker|
>    if worker
>      i = 0
>      worker.each_line do |line|
>        puts "line #{i}:#{line}"
>        i = i+1
>      end
>    else
>      exec("ruby -e '3.times {|i| p i; sleep 1}'")
>    end
> end
> 
> Does it work that way for you?

Yes it does. Double-hm.

My case is using a second ruby file, iacommand.rb, which is doing much 
the same as what your -e is doing. I wonder if that makes the 
difference? Or it must be something else.
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