From owner-freebsd-questions  Mon Apr 30 11:33:38 2001
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Date: Mon, 30 Apr 2001 14:33:15 -0400 (EDT)
From: Zhihui Zhang <zzhang@cs.binghamton.edu>
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To: Abdul Mehdi <amehdi_2000@yahoo.com>
Cc: freebsd-questions@FreeBSD.ORG
Subject: Re: FreeBSD and system V Semaphores
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Check the following options in your kernel configuration file to see if
they exist:

options         SYSVSHM                 #SYSV-style shared memory
options         SYSVMSG                 #SYSV-style message queues
options         SYSVSEM                 #SYSV-style semaphores

I can guarantee that these stuff work perfectly on FreeBSD from my
personal experiences.

-Zhihui

On Mon, 30 Apr 2001, Abdul Mehdi wrote:

> I have tried to write some simple programs about the
> binary semaphores, I didn't get the result that I
> expected but I was able to create one
> set of semaphores has one track. I think my question
> is, if I'm able to create a semaphore and delete it,
> does this mean my FreeBSD 4.0 
> supports system V semaphores, or I need to rebuild the
> kernel with new options? I have another
> question/request: Is there any body can 
> send me a simple semaphore program that has two
> processes one process take the track and write to a
> file and another process waiting 
> for the track to be free. I need to see the
> synchronization in FreeBSD please. Thanks.
> abdul
> 
> 
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