From: "S. Robert James" <srobertjames@...>
Date: 2006-11-01T10:30:09+09:00
Subject: Re: Nonblocking IO read

Not very attractive...

Back to the original question: there is no simple way to read
nonblocking, or see if any output is available ?!?!


ara.t.howard@noaa.gov wrote:
> On Wed, 1 Nov 2006 srobertjames@gmail.com wrote:
>
> > I'm running an external command (using popen4 - yes, it is available on
> > Windows also). I capture stdout and stderr.  "what will your program do if
> > there is no input?" - I assume you mean output - Well, I hope there is no
> > stderr output.  If there is, I'd like to capture it and feed it to Logger.
> >
> > Likewise, if there is a problem, and there's no stdout, then I don't want to
> > wait for ever - I want to throw an exception.
>
> so, basically you want to timeout on a read right?  in unix you can just use
>
>    require 'timeout'
>
>    Timeout::timeout(n) do
>      Open4.popen4 ...
>      ...
>      ...
>    end
>
> but, this is implimented via a thread so i think the read is going to block
> your entire process in windows... you might try it.
>
> -a
> --
> my religion is very simple.  my religion is kindness. -- the dalai lama