From: Robert Klemme <bob.news@...>
Date: 2003-02-27T21:19:10+09:00
Subject: Re: Threads, pipes, popen, whatever


"Brian Candler" <B.Candler@pobox.com> schrieb im Newsbeitrag
news:20030227105024.A89394@linnet.org...
> On Thu, Feb 27, 2003 at 06:57:18PM +0900, Michael Shigorin wrote:
> > On Tue, Feb 25, 2003 at 05:52:08PM +0900, Robert Klemme wrote:
> > > Normally you would use IO.popen but I can't see a way to access
> > > the exit status of the process directly.
> >
> > $? won't work?
>
> It does appear to work as advertised:

Thanks for the hint!

>   f = IO.popen("/usr/bin/false","w")
>   f.write "ignoreme"
>   f.close
>   puts $?    #>> 256
>
> It would be nice if the status hung around as an instance variable of f
> though.

Yes, I did not think of looking for a global variable.  This is a nice
example of the drawbacks: If two threads use popen you can't be sure any
more that the value you read from $? is the correct one.

Kind regards

    robert