On Thu, 2011-08-25 at 10:37 -0700, Thomas Bushnell, BSG wrote: > This method also has the advantage of not relying on lock promotion > semantics, which (apparently) will make the Windoze version easier. > > > Thomas > > On Thu, Aug 25, 2011 at 10:30 AM, David Henningsson > <david.henningsson at canonical.com> wrote: > On 08/21/2011 04:38 PM, Thomas Bushnell, BSG wrote: > Whoops. They need to repeat the read after obtaining > the write lock and > only update the file if the contents are still bad in > that case. > > > Would a good handling of this be: > > 1) Open the cookie read-only > 2) read the cookie > 3) close file > 4) if we have a correct cookie, do nothing more > 5) if we have the wrong cookie, do the old handling unchanged: > open with write lock, check the contents (again), and write if > something is (still) wrong. Thomas, David: Any news on this? Looks like we're agreed on an approach and this "just" needs to be implemented now. :) -- Arun
