getcwd - get pathname of current working directory
require Cwd;
$dir = Cwd::getcwd();
<![CDATA[
use Cwd;
$dir = getcwd();
use Cwd 'chdir';
chdir "/tmp";
print $ENV{'PWD'};
]]>
The getcwd() function re-implements the getcwd(3) (or getwd(3)) functions
in Perl. If you ask to override your chdir() built-in function, then your
PWD environment variable will be kept up to date. (See
Overriding builtin functions.)
The fastgetcwd() function looks the same as getcwd(), but runs faster.
It's also more dangerous because you might conceivably chdir() out of a
directory that you can't chdir() back into.