Re: dynamis class creation

[Jeremy Dreese]

I think there's a simpler way to do what you're trying to accomplish. 
Cfengine has builtin classes (see
http://www.cfengine.org/docs/cfengine-Reference.html#Hard%20classes) to
detect the OS version.  For example, on a Redhat 7.2 machine there is a
class called redhat_7_2 and on a Redhat 7.3 there is a class called
redhat_7_3.  To get the listing of all the classes on a particular host,
just run "cfagent -p -v" as root.  I use these classes to then do
different actions based on the OS version.

redhat_7_2::

        do_one_thing

redhat_7_3::

        do_another_thing

I guess this all assumes you're running cfengine 2.x.  I hope this
helps!

On Mon, 2002-07-15 at 14:02, Bob Van Cleef wrote:
> 
> This has got to be an FAQ, but I can't find it anywhere.
> 
> I want to define a custom class based on the level of OS.  So,
> I wrote a simple little script that checks /etc/redhat-release
> and returns rh60 for red hat 6.0 and rh6.2 for red hat 6.2 
> systems, etc.  Now, the question is, "How to use that script to
> define a corresponding class?
> 
> It appears that can create a separate line for each class:
>       rh60 = ( "script that returns non-null only on 6.0 system" )
>         rh62 = ( "script that returns non-null only on 6.2 system" )
> which seems counter intuitive.
> 
> but there does not appear to be a method for having a script
> that returns the name of the class that you want to define.
> 
>       define = ( "script returns name of class that is defined )
> 
> There are enough differences between various versions of Red Hat that
> this has become critical.  (Three different "amd" configuration files
> for one example.)  The standard classes include the kernel level, but
> not the OS distribution level.
> 
> Bob
> -- 
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-- 
-----------------------------------------
Jeremy Dreese
Engineering Computing Systems Integrator
College of Engineering
Bucknell University
voice: (570) 577-3714
fax: (570) 577-3579
email: jdreese@bucknell.edu