Fixed: http://hg.dovecot.org/dovecot-2.2/rev/9091d0f2d971
And for LDAP: http://hg.dovecot.org/dovecot-2.2/rev/939aa051e3f1
On 6.7.2013, at 1.18, Axel Luttgens <AxelLuttgens at swing.be> wrote:
> Hello,
>
> Let's say dovecot.conf contains:
>
> mail_uid = dovemailer
> mail_gid = dovemailer
> mail_home = /some/path/%n
> mail_location = mbox:~/mboxes:INBOX=~/mboxes/inbox
>
> and that the password database query is of the form:
>
> password_query = \
> SELECT \
> passwd AS password, \
> nickname AS user, \
> mail_home AS userdb_home, \
> mail_location AS userdb_mail, \
> WHERE \
> ...
>
> The database initially comes with NULL for both mail_home and
mail_location, the goal being to be able to progressively replace legacy
settings.
>
> With the above, one gets such entries in the logs upon a pop or imap
connection:
>
> auth-worker(11262): Debug: auth(u12345678,127.0.0.1): username changed
u12345678 -> john.doe
> auth: Debug: auth(u12345678,127.0.0.1,<dsNsasbgRQB/AAAB>): username
changed u12345678 -> john.doe
> [...]
> auth: Debug: prefetch(john.doe,127.0.0.1,<dsNsasbgRQB/AAAB>): passdb
didn't return userdb entries, trying the next userdb
>
> and, of course, the userdb_query fails since it isn't supposed to be
invoked under such circumstances.
>
> Of course, the userdb_query could be adapted so as to handle pop/imap
connections in addition to say, lmtp or doveadm connections, but this would
anyway raise the question: why bother with a prefetch database setup?
>
> In fact, it seems that the problem comes from the fact that the
password_query returns NULL values (i.e. "do not override dovecot.conf
settings") for all userdb_xxx settings even if, technically speaking, it
returns such columns.
>
> A slight yet somewhat silly modification of the password_query, such as
this one:
>
> password_query = \
> SELECT \
> passwd AS password, \
> nickname AS user, \
> 'dovemailer' AS userdb_uid, \
> mail_home AS userdb_home, \
> mail_location AS userdb_mail, \
> WHERE \
> ...
>
> indeed seems to bring back all the expected behavior: now, the "passdb
returns userdb entries" and, for example, the config's mail_home
expands to the expected value /some/path/john.doe.
>
> Could it be that the case "userdb_xxx columns returned, even if all
with NULL values" has been somehow overlooked in the code?
> Or am I erring with my interpetation of all those matters?
>
> TIA,
> Axel
>