user roles and privileges

Hi DBAs,

Does anyone have a scipt to find out the various oracle roles and privileges for users in the database?

thanks in advence...

you can look at dba_role_privs, user_role_privs, user_sys_privs

Thnx...i've looked @ the above listed dd tables, but just thought s'one has a custom script that joins the various tables to produce a single report...