I've got a perl script to handle 404s but I need to know the filename of the page that triggered the 404 (the missing resource)

the ENV['REQUEST_URI'] returns the address of the 404script.

Basically I want to make it look like that file is there by generating the page on the fly and returning a 200 header, but I need to know which file to generate.

Any help would be appreciated.

Cheers,

lee