Redirect authentication to another module

["ananias moura" <ananias moura gmail com>]

Hello,

I'm writing a PAM module but I stumbled into something I'm not very sure if it's possible to solve in a clean way.

I want my module to redirect the authentication to the basic pam_unix.so in case the user is not root for example.

Is it possible using stacking or any other way?

Thanks.