[galaxy-dev] Getting the input name of the dataset

Hi there, I am new to Galaxy and I've just recently learned how to integrate a Perl script to it. Now, my code uses the input file's name as a header for a column in the output. When I ran it in Galaxy, I did get the filename, but it's the one ending in .dat (actually, I got the entire path of the file). I was wondering if it's possible to retain the original name of the file (or retrieve the name of the input dataset) and use it in the output file. I can't think of a Perl script for this yet, for my scripting's a bit rusty (I just started learning Perl last month). I've already checked the FAQs page, the wiki and the mailing list, but I did not get any useful hints. I hope my writing made sense. Thank you for your time! - Diana