> > Is there a white paper on file locking and how it works, including
> > techniques of use, particularly dotlocking and flock/fcntl?
>
> There may be, but in a nutshell, dot-locking is the most common
> method used for mail spools. Qpopper always uses dot-locking as well
> as either flock() or fcntl().
Thanks Randall. I am following your advice to upgrade from
procmail 3.13.1 and qpopper 2.52.
I would like to upgrade the procmail first as it is the easiest,
to procmail 3.15.1
I was taken aback by the new procmails use of username.lock in
/var/spool/mail to lock mailboxes. Will this be a problem with the
locking used by qpopper 2.52 which I believe is .username.lock in the
/var/spool/poplock directory?
Homer
