Parts of the OP suggest that File::Basename may be preferable to custom coding.

> my $suffix = $file; # suggests a file name
> ...
> rev1.config # looks like a file name

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The desired result may need some care in reading the module documentation 
perldoc File::Basename

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with extra attention near the helpful line: 
fileparse("/foo/bar/baz.txt", qr/\.[^.]*/);

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Ron

In reply to Re^2: How to remove the words before the dot using perl? by mr_ron
in thread How to remove the words before the dot using perl? by finddata

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