Re: Mandatory locking?

[Ville-Pertti Keinonen]

[EMAIL PROTECTED] (John-Mark Gurney) writes:

> Ville-Pertti Keinonen scribbled this message on Aug 24:

> >     cat writes part of oldmail to /var/mail/grog
> >     sendmail locks /var/mail/grog
> >     (cat may try to write more to /var/mail/grog but blocks)
> >     sendmail delivers new mail
> >     sendmail unlocks /var/mail/grog
> >     cat writes the rest of oldmail to /var/mail/grog
> > 
> > You'll still probably end up with a broken mailbox.
> 
> what you do is this:
> lockf -k $mailfile cat ${mailtmp} >> $mailfile

Which doesn't support Greg's arguments for mandatory locking, as
you're now doing locking in both programs.


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