current host and dbname info - Mailing list pgsql-sql

Hi,

I've been searching the docs and been unable to find the answer to this --
is there a way to get the current database server host tcpip address,
postmaster port, and database name from a SQL query?

I'd like to access those from within a plpgsql function without having to
create and populate some sort of identification table.

Thanks,

Joe