Unnamed

[CODE]
use Cwd;
use warnings;
use strict;
checkdatabase();
sub usage {
	print "Usage: perl $0 file_to_find\n";
	exit;
}
sub checkdatabase {
	my $dbfile = 'c:/windows/locate.db';
	open(my $fh,$dbfile) or createdatabase();
	close($fh);
	my $checkage = lastmodif($dbfile);
	if($checkage > 10) {
		print "warning: database is more than 10 days old\n";
		my $ans;
		while($ans ne "y" || $ans ne "n") {
			print "Do you want to update? [y/n]: ";
			chomp(my $ans = <STDIN>);
		}
		if($ans eq "y") {
			unlink("c:/windows/locate.db");
			createdatabase();
		}
	}
	my $file = @ARGV or usage();
	filesearch($file);
}
sub filesearch {
	my $file = shift;
	my $dbfile = 'c:/windows/locate.db';
	open(my $fh,$dbfile) or createdatabase();
	while(<$fh>) {
		if($_ =~ $file) {
			print "$_\n";
		}
	}
	close $fh;
	exit;
}
sub lastmodif {
	my $file = shift;
	my $mtime = (stat($file))[9];
	my $secs = time - $mtime;
	my $days = int($secs / 86400);
	return $days;
}
sub createdatabase {
	scandir("/");
	print "Database created/updated\nexiting\n";
	exit;
}
sub scandir {
	my $curdir = shift;
	my $startdir = &cwd;
	chdir($curdir) or die $!;
	opendir(my $dir,".") or die $!;
	my @files = readdir($dir) or die $!;
	closedir($dir);
	open(my $fh,'>>',"c:/windows/locate.db") or die $!;
	foreach my $file (@files) {
		next if ($file eq ".");
		next if ($file eq "..");
		if(-d $file) {
			scandir($file);
			next;
		}
		print $fh "$startdir/$curdir/$file\n";
	}
	close($fh);
	chdir($startdir) or die $!;
}
[/CODE]
[Unwanted output]
C://C://a
C://C://a.txt
C://C://acrack.pl
C://C://asdf.pl
C://C://AUTOEXEC.BAT
C://C://boot.ini
C://C://ciasteczka.txt
C://C://ciscos.c
C://C://CONFIG.SYS
C://C://DebugTrace-RockallDLL.log
C://C://djpeg.exe
C://C://Endocing.txt
C://C://error.txt
C://C://faks_VAZNO!@#%@$#.txt
C://C://FLV2Video_Setup_r44744.exe
C://C://get_video.flv
C://C://gocr.exe
C://C://IO.SYS
C://C://item1771.jpg
C://C://locate.pl
C://C://Matrix-sida.jpg
C://C://MSDOS.SYS
C://C://NTDETECT.COM
C://C://ntldr
C://C://pass.txt
C://C://PDOXUSRS.NET
C://C://RivaEncoderSetup.exe
C://C://sambal.c
C://C://showMessagePane.php
[/Unwanted output]
sub scandir() wont finish, it always stops when it needs to scan the very root directory and it exits with error:
Invalid argument at locate.pl line 57.