On tis, 2011-09-27 at 16:13 -0700, Steve Crawford wrote:
> It would perhaps be useful to add optional --old-confdir and
> --new-confdir parameters to pg_upgrade. If these parameters are absent
> then pg_upgrade would work as it does now and assume that the config
> files are in the datadir.
It should work the same way the postmaster itself works: If the given
directory is not a data directory, look for the postgresql.conf file and
look there for the location of the data directory.