Op 07-10-2021 om 02:33 schreef Aki Tuomi:

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On 06/10/2021 22:52 David Mandelberg david@mandelberg.org wrote:

Hi,

Is it safe to write to the Maildir subscriptions file directly?

I'm trying to figure out a way to make sure the subscriptions match the actual folders exactly. I know how to subscribe to existing mailboxes with doveadm mailbox list and doveadm mailbox subscribe, but the latter seems to only accept mailboxes on the command line, and any local user can see the command line of any other user's commands. Also, that doesn't handle unsubscribing from non-existent mailboxes. I think unsubscribing from any mailboxes listed in doveadm mailbox list -s but not in doveadm mailbox list would work, but it has the same issue of mailboxes on the command line.

It looks like I could do what I want with something like this command, but I'm not sure if it's safe to write directly to the subscriptions file:

{ echo INBOX; ls -1A | grep '^\.' | cut -c 2-; } > subscriptions

(I was also thinking about using doveadm mailbox list to write the subscriptions file directly, but it looks like they use different separators and encodings.)

You could also use the doveadm HTTP API to handle subscription changes? It should be safe to modify that file though, especially if the user is not logged in.

That API looks easy to use, thanks for the pointer! Though I'd rather not add credentials for it, and I don't see an easy way to make HTTP requests over a unix socket in Python. Oh well.

I also realized that if/when I set up dsync replication, writing directly to a file could get complicated. Maybe I'll just make a cron job to compare doveadm mailbox list and doveadm mailbox list -s, and send an email if there's any difference.