Forcing a rpm install to fail on some condition

["Dukhan, Meir" <Mdukhan ndsisrael com>]

Hi,

I would like to know if some kind of %script exists and help to do the following:
	1. fail to install the rpm package if architecture is wrong 
	2. fail to install the rpm package if OS is wrong 
	3. fail to install the rpm package if a specific user or environment variables are missing 

I know bout %ifarch (%ifnoarch), %ifos (%ifnos) but I want to make the rpm install 
to fail if one of the above condition is missing. 

Thanks a lot

-- Meir 
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