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Subject: Re: Semaphore operation
To: tpatel@ecpi.com (Tushar Patel)
Date: Tue, 20 Feb 1996 16:54:02 -0500 (EST)
From: "John Capo" <jc@irbs.com>
Cc: freebsd-isp@freebsd.org
In-Reply-To: <199602201222.MAA14593@ecpi.com> from "Tushar Patel" at Feb 20, 96 12:22:54 pm
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Tushar Patel writes:
> 
> Is there anything in the FreeBSD which will allow me to do semaphore 
> operation?
> 
> Like the semop() systemcall on the sun.
> 

goombay 241% man semop

SEMOP(2)                   UNIX Programmer's Manual                   SEMOP(2)

NAME
     semop - atomic array of operations on a semaphore set

SYNOPSIS
     #include <sys/types.h>
     #include <sys/ipc.h>
     #include <sys/sem.h>

     int
     semop(int semid, struct sembuf array[], unsigned nops)

etc....

You need to build a kernel with the SystemV options enabled.  Look
in /sys/i386/conf/LINT for the particulars.


John Capo                                                   jc@irbs.com
IRBS Engineering                       High performance FreeBSD systems
(305) 792-9551                      Internet Consulting - ISP Solutions