File locking question

[Olaf Frączyk <olaf cbk poznan pl>]

Hi,

I use several mailboxes.
Does Balsa lock (using flock, or fcntl) mailbox files.
Does this apply to /var/spool/mail/mymailbox only, or to all mailboxes I
use.
I would like to know if it is safe to use several Balsas by different
people with access to the same mailboxes. Does balsa lock file for all time
it is open, or only for time it writes changes to it?

Oh, and addresses, I remember, that it was not safe to update address book
in the same time by two different balsas. Is it possible now, to share
address books between users?

Best Regards,

Olaf Fraczyk