Messages in this thread | | | Subject | Re: Problems in 1.3.93 | From | Matti E Aarnio <> | Date | Mon, 22 Apr 1996 20:25:59 +0300 (EET DST) |
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> It is interesting, has POSIX.???? mandatory locks? > > UNUX^{TM} contains a lot of such queer beasts. > All the textbooks (well, maybe, not all, I've read nothing > except for Stevens 8)8)) explain that nobody knows for what > mandatory locking was invented. Nobody knows useful applications > for SYSV IPC semaphores and message queues.
Semaphores are a must for shared memory processes, where the memory has multiple writers (and readers). Message queues are a great way to do IPC in pretty clean manner.
These strange looking things have propably appeared because they pleased somebody's theory-oriented mind, and/or as a customer wanted them... (And we all know that the paying customer is always right... Right ?)
> Unfortunately, linux should comply any standards. > POSIX must be respected. The requirements of SVID are allowed > to be ignored: linux is not UNIX, isn't it?
POSIX does not cover everything... One can do POSIX.1, and to a certain degree also POSIX.2 (shells) at the MVS!
> Alexey Kuznetsov.
/Matti Aarnio <mea@utu.fi>
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