Re: Triggers Documentation?

Hello, I would like to write a cobbler trigger to do something every time I add a system. I looked at the documentation at: https://fedorahosted.org/cobbler/wiki/CobblerTriggers but I think I am missing something. A simple example is given in the form of a shell script and it shows $1 used as the name of a newly added system. However, I see nothing defining the arguments passed, nor the environment. I see that one can use the CobblerApi, but when I follow the link it tells me not to use "BootApi" (is BootApi == CobblerApi?) but to use "CobblerXmlrpc" instead. That seems to be a client/server system. The trigger docs say not to use it. A says use B. B says don't use B, use C. A says don't use C. ???? So, is there anything defining the trigger API? Does one really need to use Python to do anything meaningful? I'm definitely not a Python wiz. It says that pre-triggers can prevent an add operation. How? Just exit(1)? How do I report errors back to the user? In case it would help to understand my situation, I would like to be able to leave the networking empty and have a system add operation automatically define eth0 using the hostname to look up the MAC via "getent ethers hostname". I can easily write the code to do the lookup in sh/bash/ksh or perl, but I need to be able to supply the information back to the cobbler system after the lookup. I need to be able to fail on errors.