That's not the attitude I would take. The %ENV hash can be replaced very easily with any one of the Config modules on CPAN. And, in fact, should be replaced with those. By doing that, you remove a huge area which is OS-dependent. It also removes a lot of the maintenance headaches for you. I would seriously look into doing that.

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We are the carpenters and bricklayers of the Information Age.

Don't go borrowing trouble. For programmers, this means Worry only about what you need to implement.

Please remember that I'm crufty and crochety. All opinions are purely mine and all code is untested, unless otherwise specified.