Case insensitive file open in Perl

Maybe I'm just braindead tonight (likely as it seems as though I've not
adjusted to the time change yet).

I'm working on a program that will load a user supplied file.  Since
the file will be downloaded from the Web, it's possible that it will be
all upper case, all lower, or a mixture.  Nice, huh?

I'm trying to recall how one goes about doing a case insensitive search
for the filename.  I know that I can use the //i matching operator. 
Would a foreach loop and passing each glob by the /filename.ext/i match
be the way to go?

Thanks!

- Nate >>

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