please fix your archive filename scheme

Sometimes, when dealing with proprietary software, you do not have such a luxury. In the present case, I'd bet my lunch on the fact that the OP is dealing with Checkpoint FW-1 logs. Yes, the naming scheme sucks, but I doubt filing a bug report would do anything because they would probably reply that it would breaking existing code that deals with the current scheme. Renaming them to do local processing is just a hassle. This is exactly the sort of task Perl excels at, making the difficult things easy.