You can use a negated character class: [^-\w] (match any character that isn't a \w or dash): 
if ( $dir =~ /[^-\w]/ ) {
     print "\t$dir is not clean.\n";
} else {
     print "\t$dir is clean.\n";
}#close if

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See perlretut, perlrequick and perlre for the details.

In reply to Re: Regex Problem by FunkyMonk
in thread Regex Problem by nimdokk

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