use warnings;
use strict;
my $PATH = '/tmp/foo';
opendir my $dh, $PATH or die $!;
print "\"$_\"\n" for
	grep { -f "$PATH/$_" && /^([0-9][\w.:,=\-]+)$/ }
		readdir $dh;
closedir $dh;
__END__
"1231125716.6864.bLyyk:2,S"
"123test"
"1422830161.R3.asus64:2,S"