Thanks Tom. I found the relevant bit of code in the psql files. Looks like
it's just a simple loop that compares the error with the phrase
"fe_sendauth: no password supplied" and then prompts for the password and
tries again. Of course, if someone in the future decides to change the error
message, then the code gets broke. I doubt that's likely however.
-Tony
----- Original Message -----
From: "Tom Lane" <tgl@sss.pgh.pa.us>
To: "Tony Reina" <reina_ga@hotmail.com>
Cc: <pgsql-admin@postgresql.org>
Sent: Monday, June 28, 2004 12:12 AM
Subject: Re: [ADMIN] Password with libpq
> reina_ga@hotmail.com (Tony Reina) writes:
> > However, what about in the general case where my client program
> > doesn't know if a password is required or not. Is there any libpq
> > function to query the server if a password is required? Perhaps,
> > there's a return value for PQconnectdb which would tell me that the
> > connection failed because of the password? (In which case, I can ask
> > for the password and try the connection again.)
>
> Look into the psql source code; it does essentially this.
>
> regards, tom lane
>