Firebird 2.5.1 List databases in use by the server (superserver mode)

Question

I want to write a C++ administrative app to simplify management of DBs I am in charge of. Currently, when I want to tell if there are users connected to multiple Firebird databases operated by 2 different instances of it, I have to connect to every single DB and check. That's ok, but I don't want to register every new database that is being created when i don't look, I want some way to list databases that are currently open or otherwise in use by the server. Current 2 uses of this functionality I can think of are:

1. Auto-inclusion in backup procedure
2. Application update, which require users to log off (one-look and I would be able to tell whom to kick or at least which department to call)

Answer 1

Firebird does not have an API to list all available databases. Technically Firebird simply doesn't know about the existence of a database until you actually connect to it.

You might be able to find all databases that are being connected to using the Trace API or the monitoring tables, but that does not exclude the possibility that other databases exist on your system.