\&Recursive is a callback function (or more precisely, a reference to it) that is being called by File::Find as it walks through the tree.  Why do you want to pass it a parameter?

Maybe you want a closure(?)  Something like this: 

use File::Find;

my $source = "/mnt/usbdisk";

sub make_wanted {
    my $arg = shift;
    return sub {
        my $diskpathfile = $File::Find::name;
        print "$arg: $diskpathfile\n";
    }
}

find (make_wanted("hello"), $source);

[download]

Here, make_wanted() returns a parameterized function (closure) to be used as the callback routine, i.e. the function instance retains its parameter "hello" as $arg.

In reply to Re: Pass an "extra' variable to Find::File subroutine by almut
in thread Pass an "extra' variable to Find::File subroutine by timtowtdi

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