acl_shared_dict = file:/private/dovecot/var/etc/shared-mailboxes
The '../var/etc' directory is something like 755. I have to create
the file first and make it 666.
That should work.
When it is updated, ownership& permissions are changed such that
the user giving acl permissions then owns the file and it's 600.
That shouldn't happen. It should preserve the original file
permissions. If the file doesn't exist, it should get parent
directory's permissions and use them. Wonder if the problem is the
parent dir's permissions?
It's of course also possible that there is a bug. It would speed
things up a bit if you could try this with latest v2.0 nightly
snapshot if it's still broken:
http://dovecot.org/nightly/dovecot-latest.tar.gz
I tried setting it back to 644 afterward, so other users could read
it, but they tried setting a lock in that dir as well.
Yes, lock files are created every time the file is updated (it's
recreated every time).
If users need to set locks, then the directory will need to be writable
by everyone.
I tried this:
acl_shared_dict =
file:/private/dovecot/var/etc/shared-list/shared-mailboxes-%u
That just won't work (or at least do anything useful). Each user
would have his own file, and no one else would see it.
My second choice was to use sqlite for this acl_shared_dict, but,
even though I compiled dovecot with sqlite support and 'ldd' shows
that '../libexec/dict' is linked against sqlite libraries, when I
tried this config:
acl_shared_dict = sqlite:/private/dovecot/etc/acl-shared-dict.conf
I get this, and dovecot fails to start up.
EUnknown dict module: sqlite
Right. This is because typically all except file backend goes through
dict process, and you need to use proxy backend to do that. See for
example quota dict configuration.
I'll see if that helps.
On a related note, I thought I'd increase debugging to see if that
helped out any. When I change 'mail_debug' to 'yes', as soon as I
issue the imap login command, it logs some stuff, then kicks me
out.
Jun 09 15:57:53 IMAP(tom2): Info: acl: initializing backend with
data: vfile Jun 09 15:57:53 IMAP(tom2): Info: acl: acl username =
tom2 Jun 09 15:57:53 IMAP(tom2): Info: acl: owner = 1 Jun 09
15:57:53 dovecot: Error: child 6000 (imap) killed with signal 11
(core dumps disabled)
Signal 11 means a crash. It's always a bug. A gdb backtrace would be
helpful in fixing it. See http://dovecot.org/bugreport.html
I'll see if I can generate a gdb backtrace. I did figure out that this
only happens when I have the 'mail_plugins = acl imap_acl' in the
'protocol imap' section and only with mail_debug. When that combination
is not in play, I don't get the crash.
I have been frustrated by the shared namespace documentation. I've
been through it again and again, but haven't found the answers I've
been looking for.
I guess it's not ideal yet, but I don't yet have any ideas how to
improve it. Maybe once you get it working, you could suggest
something?
I'll try. I think the documentation makes perfect sense for those who
have it working, but not for those fumbling in the dark.... :-) I'll
have to find my way out of this dark room before I can help illuminate
it for anyone else. ;-)
namespace shared { location =
mbox:%%h/mail/shared:INDEX=%%h/mail/shared/.imap
Don't set the :INDEX directory that way. It probably won't break
anything, but it's confusing. Root level mailbox indexes share the
indexes with the originating user, but non-root level mailboxes are
added under shared/.imap/ directory rather than shared/sub/.imap/
directory.
Although .. the whole idea of using mail/shared here doesn't really
seem right. You want users to be able to share only mailboxes under
shared/ and show them as shared/user/.. without the additional
shared? I don't think I've tried that kind of a setup before. Maybe
it should work .. maybe it does work and isn't the problem. But try
removing that first and see if it's actually the cause of your
problem.
Also I'm not sure if I ever tried using mbox for shared mailboxes,
but I think it should work..
k. I'm still trying to understand that; sorry. Yes, I was thinking of
separating out the shared folders into a subdirectory. I was thinking
that the folder would need special permissions so that others could
write to it. Perhaps maildir solves all of these issues.
So, you'd recommend using maildir instead of mbox for shared mailboxes?
I don't understand how that would work if my default namespace is
using mbox.
Would I end up with yet another namespace for maildir use? The person
who is sharing the mailbox will need to access that shared mailbox
somehow, and I assume *not* using the shared namespace, as it is their
own mailbox.
So, would it be accessed as something like 'MAILDIR/mailfolder' by that
user (assuming 'MAILDIR' is the namespace), and
'shared/shareuser/mailfolder' by the others?
thank you
Tom Lieuallen
