From: Garance A Drosihn <drosih@...>
Date: 2003-11-25T07:08:51+09:00
Subject: Exit status on cmd executed via popen()

Sometimes I write ruby scripts to filter the output of some
other command.  So I write something like:

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

Is there any way to find out what the exit status was from
the command given to popen?  It would be nice to have some
method that I could use like:

if cmdout.popen_exit_status != 0
     #  Do Error-processing stuff
end

which could be done after reading all the lines, but before
the call to 'close'.

Or do I need to do something more complicated than 'popen'
if I need to know the exit code from that command?

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