From: Gary Wright <gwtmp01@...>
Date: 2009-12-30T08:15:47+09:00
Subject: Re: IO.popen('-') === fork ?


On Dec 29, 2009, at 6:03 PM, Nilez Parker wrote:

>> I don't see why you go through this instead using one of the #popen
>> family of methods (there is also #popen3).
> 
> Thanks again .. but I've looked around at the docs and I don't see how I 
> could accomplish the same thing as my example code. Perhaps the main 
> problem is that with popen* the parent process goes into the block too, 
> and its pipes with the child are closed when it leaves the block. This 
> is a problem because I need to start several child forks and be able to 
> communicate with them all, and then start and stop them at will from 
> there. Any pointers as to how I can / should use popen, or popen2, or 
> popen3?

If you don't pass a block to IO#popen, it just returns the IO object.
popen3() works similarly.


Gary Wright