sql syntax to replace desc - Mailing list pgsql-general

Dear all,

I need to see my table structure complete with it's constraint (at least primary key, foreign key, not null, unique)
In oracle or mysql, I usually use desc table_name to achieve such result
But I find from pgsql-doc that desc isn't implemented.

Does anyone know some sql syntax to do that?

I'm not talking about \d option at psql console since I need that data
to be called from programming language such as PHP and Ruby

Thank you
Regards
Hendra