What is the search_path for a given database and user?

I can see the current search_path with:

show search_path ;

And I can set the search_path for the current session with:

set search_path = "$user", public, postgis;

As well, I can permanently set the search_path for a given database with:

alter database mydb set search_path = "$user", public, postgis ;

And I can permanently set the search_path for a given role (user) with:

alter role johnny set search_path = "$user", public, postgis ;

But I would like to know how to determine what the database and role settings are (with respect to search_path) prior to altering them?