File::Glob has a :nocase option: 

use File::Glob qw(:nocase);

my @files = <[f]oobar>;

[download]

would return whatever is found in the filesystem, i.e. any of "foobar", "Foobar", FooBar", etc.

In reply to Re: Legacy Data Files on a Case-sensitive File-system by almut
in thread Legacy Data Files on a Case-sensitive File-system by pobocks

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