From: ara.t.howard@...
Date: 2006-03-21T01:59:04+09:00
Subject: Re: IO#popen and exit status

On Tue, 21 Mar 2006, Claudio Jeker wrote:

> I'm a bit stuck with this porblem:
> I need to write data to a process and then wait for the exit code of it to
> see if it was successful or not.
>
> Now I can IO.popen the process but there is no pclose instance method to
> get the exitcode back. Additionally my workaround via Process.waitpid2 does
> not work either. I think io.close does already all the cleanup.
>
> e.g.
>
> io = IO.popen(cmd, "w")
> io.write(msg)
> io.close
> pid, status = Process.waitpid2(0)
>
> Raises a "Errno::ECHILD: No child processes" exception.
>
> How do other handle this situation? Do I need to take the hard road via
> pipe, fork, exec or did I miss something obvious?


   gem install open4

-a
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