From: Alex Young <alex@...>
Date: 2011-03-25T19:32:10+09:00
Subject: Re: Pid of the other end of a popen3?

Robert K. wrote in post #989166:
> On Fri, Mar 25, 2011 at 10:58 AM, Alex Young <alex@blackkettle.org>
> wrote:
>>
>> And it always raises. Looking at the source for Open3.popen3, it looks
>> like the child pid gets swallowed by the double-fork. Is there any way
>> to get it back?
>
> What "double fork"?  It seems you are using the wrong method:
>
> irb(main):021:0> Open3.popen3("sleep", "5") {|a,b,c,t| p a.pid, t[:pid]}


Sorry, I missed a vital bit of information, that being which Ruby
version I'm on:

ruby-1.8.7-p302 :003 > Open3.popen3("sleep", "5") {|a,b,c,t| p a.pid; p
t[:pid]}
nil
NoMethodError: undefined method `[]' for nil:NilClass

--
Alex

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