C API, PQconnectdb and options Q.

I'm using a Redhat version of PostgreSQL 7.2.3 with the C API. Mostly
things work right, but I need more debug output, as I have a query that
works fine from psql, but fails with the C API (perhaps this is because
I use PQescapeString). The only way to know there is an error is that
the insert never happens, and that the system log reports a parse error
at or near the first field of an insert. What I am wonder is (a) how to
use the tty= in the string passed to PQconnectdb, and (b) a reference
URL for what options are available in the options= part of the string
parameters accepted by PQconnectdb. So far all I end up with if I try to
name a file for tty= or a tty from /dev/ for tty= is a core dump.

D. Stimits