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=head1 NAME
getcwd - get pathname of current working directory
=head1 SYNOPSIS
require Cwd;
$dir = Cwd::getcwd()'
use Cwd;
$dir = getcwd()'
use Cwd 'chdir';
chdir "/tmp";
print $ENV{'PWD'};
=head1 DESCRIPTION
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
L<perlsub/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.
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