Dave Hart wrote: > On Tue, Mar 29, 2011 at 7:41 UTC, Martin Burnicki > <martin.burni...@meinberg.de> wrote: >> Whether addressing of either mode is done by separate driver numbers >> (which I still find a good idea in this case, since SHM is a generic >> driver), or by a mode number for the existing SHM driver, is a totally >> different question. > > I'm leaning towards using the existing shared memory layout and > protocol for units 0-3, which until relatively recently were the only > possibilities, and POSIX named shared memory with new, safer layout > and protocol for units 4 and up. gpsd today only provides 0-3. 0 & 1 > have root-only permission, while 2 & 3 are world-writable. I'm also > tending towards ntpd never creating the POSIX named shared memory nor > relying on its presence to configure the clock, but attempting to open > it read-only if it's not already on each poll, and close it if there > are no updates for a timeout period.
Sounds good to me. Martin -- Martin Burnicki Meinberg Funkuhren Bad Pyrmont Germany _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
