# By John Bazik## Usage: $cwd = &fastcwd;## This is a faster version of getcwd.  It's also more dangerous because# you might chdir out of a directory that you can't chdir back into.sub fastcwd {	local($odev, $oino, $cdev, $cino, $tdev, $tino);	local(@path, $path);	local(*DIR);	($cdev, $cino) = stat('.');	for (;;) {		($odev, $oino) = ($cdev, $cino);		chdir('..');		($cdev, $cino) = stat('.');		last if $odev == $cdev && $oino == $cino;		opendir(DIR, '.');		for (;;) {			$_ = readdir(DIR);			next if $_ eq '.';			next if $_ eq '..';			last unless $_;			($tdev, $tino) = lstat($_);			last unless $tdev != $odev || $tino != $oino;		}		closedir(DIR);		unshift(@path, $_);	}	chdir($path = '/' . join('/', @path));	$path;}1;