automating remote pg_dump

I notice pg_dump does'nt have a '-P' flag to provide a password, so I assume
you generally use it to pull data through a socket.

I need to run it remotely (to dump a live db and clone its structure to a test
db for unit testing), has anyone got a way to do this?

I've tried 'echo pass | pg_dump -h host -U user dbname' , but she doesnae like it....

extra points for answers that don't include the word 'expect' :D

-- 
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Rasputin :: Jack of All Trades - Master of Nuns