checking a file's dependents/cies?

[René J.V. Bertin]

Hi,

Is there a direct way to check what (binary) files depend on a given file belonging to a port, something a bit less blunt than moving the file aside and running `port -v rev-upgrade`?
I presume a mysql query of the registry could return that kind of information - just as it could return the file's own registered dependencies?

Thanks,
René