Bryan O'Donoghue <bryano at europlex.ie> 42 lines of wisdom included:
> Hmm.
>> 1 & 2 ahh, awful.
>> IPC_PRIVATE, good stuff.
>> It looks like if I were to accidentially use the same key for two
> different attempted semget operations (without) the IPC_EXCL bit, that
> the Kernel/runtime would happily give me back the same semaphore id,
> which implies if I did have collision due to using a port number or ftok
> key, I'd be .... irritated[1], to find I didn't have a unique semaphore
> later on.
It's possible that you could use a "magic number" at the start of
the semaphore as well, which would be another good indicator.
If you look in Google for "magic number semaphore", you'll get the
following, in the first few respones:
http://archives.postgresql.org/pgsql-hackers/2000-11/msg01141.php
Regards,
--
Philip Reynolds | RFC Networks Ltd.
philip.reynolds at rfc-networks.ie | +353 (0)1 8832063
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