On Mon, 6 May 2002, Tom Lane wrote:
> "Marc G. Fournier" <scrappy@hub.org> writes:
> >> We could get around this, of course: record the port number in the data
> >> directory lockfile, and test for existence of the old socket
> >> independently of trying to create a new one. But it seems ugly.
>
> > How about a second, data directory based socket simply named something
> > like '.inuse', that is not port dependent?
>
> Hmm ... but how do you use that to tell if there are still backends
> around?
As a backend is started up, connect to that socket ... if socket is open
when trying to start a new frontend, fail as there are currently other
connections attached to it?