opendir(my $dh, '.')
  or die("Unable to list directory: $!\n");

my @patterns = map { qr/\Q$_\E/ } 
               grep { /^\.\.?$/ }
               readdir($dh);

open(my $fh_in, 'test.txt')
   or die("Unable to open input file test.txt: $!\n");

while (my $line = <$fh_in>) {
   chomp $line;
   foreach my $pattern (@patterns) {
      print("Match found\n") if $line =~ $pattern;
   }
}