From: Jim Menard <jim.menard@...>
Date: 2008-07-22T04:13:26+09:00
Subject: Re: How to invoke an external program and get anything the pgm returns back

On Mon, Jul 21, 2008 at 2:35 PM, Victor Reyes <victor.reyes@gmail.com> wrote:
> Team,
>
> I have a Ruby script which might invoke an external program.
> The external program could be written in: Ruby, Perl, KSH, CSH, BSH, Etc.
> The invoked program might return a value in the the form of a return code.
> For example, a KSH script might execute an *exit 99* stmt and which value I
> would like to capture in the invoker, Ruby script.

The global variable $? holds the exit status. If you require 'English'
then you can use the name $CHILD_STATUS instead of $?

>
> I tried:
> Ruby script segment:
>      rc = `/usr/local/bin/script_name`
>
> I also tried in the Ruby caller script:
>     system("/usr/local/bin/script_name")
>
>
>
> KSH:
> exit 99
>
> But *rc* does not have anything of value. It has either *true* or *false*.
> ========================
>
> Also, using Ruby to Ruby I still can't get a Ruby script called another Ruby
> script, have the called script returns a value and have the invoker Ruby
> script get the value.
>
> Is there anyway to get what I described above?
>
> Thank you
>
> Victor
>

Jim
-- 
Jim Menard, jimm@io.com, jim.menard@gmail.com
http://www.io.com/~jimm/