#!/usr/bin/perl -w

use strict;
use Cwd;
use File::Find;


my $filespec   =  '*.pl *.txt';
my $dir        =  $ARGV[0] || getcwd(); 

find( { wanted => \&find_function, preprocess => \&globber }, $dir );

sub find_function {
   print $File::Find::name . $/;
}

sub globber {
   ( glob  "$filespec" );
}