From: Farrel Lifson <farrel.lifson@...>
Date: 2006-03-23T05:36:00+09:00
Subject: Re: Return code of process from IO

Just solved it. Just run Process.wait after the call to the IO.popen
and $? gets updated.

On 3/22/06, Farrel Lifson <farrel.lifson@gmail.com> wrote:
> Hi folks,
>
> I'm using IO.popen to communicate with an external process. At some
> point the external process will exit either with a true or false
> condition. It uses shell return codes (0 for true, 1 for false) to
> indicate that this is happened. Is there a way to get the vale of this
> return code from an IO object? Or will it be better to use Kernel.` or
> suchlike. The $? system var doesn't seem to be updated using IO.
>
> Farrel
>