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

my %searchlist = map { $_ => 1 }
                 grep { /^\.\.?$/ }
                 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;
   print("Match found\n") if $searchlist{$line};
}