use Hook::LexWrap;
use File::Copy::Recursive qw(dircopy);
use strict;
use vars qw($dir_from $dir_to);
$dir_from = "/tmp/from";
$dir_to = "/tmp/to";

$|=1;

# Using Hook::LexWrap
my @dirs;
wrap *File::Copy::Recursive::copy,
	pre => sub { @dirs = @_ },
	post => sub { printf "copying %s to %s. \r", @dirs };

dircopy($dir_from, $dir_to);
print "\n";

##</code><code>##

use File::Copy::Recursive qw(dircopy);
use strict;
use vars qw($dir_from $dir_to *mycopy);
$dir_from = "/tmp/from";
$dir_to = "/tmp/to";

sub mycopy_func {
	# call the original
	&mycopy(@_);

	# call my sub after
	mycopy_showprogress(@_); 
}

sub mycopy_showprogress {
	# this could call anything to show progress or even
	# to operate on the file being copied
	printf "copying %s to %s. \r",@_;
}

$|=1;

# Add the hook
*mycopy = *File::Copy::Recursive::copy;
*File::Copy::Recursive::copy = *mycopy_func;

dircopy($dir_from, $dir_to);
print "\n";