From: Garance A Drosihn <drosih@...>
Date: 2003-11-25T09:23:00+09:00
Subject: Re: Exit status on cmd executed via popen()

At 7:27 AM +0900 11/25/03, Gennady wrote:
>Try variable $?, it holds the status of the last executed
>command. Works for commands executed with 'system', I think
>it is valid for popen as well.

Interesting.  In the code sequence of:

cmdout = IO.popen(somecmd, "r")
cmdout.each_line {|aline|
     #  Do Stuff...
}
cmdout.close

I had tried checking $? just before cmdout.close, and it had a
value of nil.  However, checking it immediately *after* the
close, it does seem to have $? set to the desired value.  As
long as I can depend on this, it will do the job very nicely.
Thanks!

-- 
Garance Alistair Drosehn            =   gad@gilead.netel.rpi.edu
Senior Systems Programmer           or  gad@freebsd.org
Rensselaer Polytechnic Institute    or  drosih@rpi.edu