From owner-freebsd-current  Wed Oct 16  9:31: 1 2002
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 6402137B401; Wed, 16 Oct 2002 09:31:00 -0700 (PDT)
Received: from pintail.mail.pas.earthlink.net (pintail.mail.pas.earthlink.net [207.217.120.122])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id C3CF743EAC; Wed, 16 Oct 2002 09:30:59 -0700 (PDT)
	(envelope-from tlambert2@mindspring.com)
Received: from pool0308.cvx40-bradley.dialup.earthlink.net ([216.244.43.53] helo=mindspring.com)
	by pintail.mail.pas.earthlink.net with esmtp (Exim 3.33 #1)
	id 181r4U-0005Yw-00; Wed, 16 Oct 2002 09:30:58 -0700
Message-ID: <3DAD93FB.78324E0E@mindspring.com>
Date: Wed, 16 Oct 2002 09:29:47 -0700
From: Terry Lambert <tlambert2@mindspring.com>
X-Mailer: Mozilla 4.79 [en] (Win98; U)
X-Accept-Language: en
MIME-Version: 1.0
To: Maxim Sobolev <sobomax@FreeBSD.ORG>
Cc: Robert Watson <rwatson@FreeBSD.ORG>,
	"Danny J. Zerkel" <dzerkel@columbus.rr.com>,
	"Vladimir B. Grebenschikov,Moscow,408-7227,123-4567,Some-info" <vova@express.ru>,
	freebsd-arch@FreeBSD.ORG, freebsd-current@FreeBSD.ORG
Subject: Re: short uid/gid
References: <Pine.NEB.3.96L.1021016004135.36711H-100000@fledge.watson.org> <3DAD2B79.AD5412CA@mindspring.com> <20021016093048.GB10908@vega.vega.com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-current.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-current>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-current>
X-Loop: FreeBSD.ORG

Maxim Sobolev wrote:
> > You could also simply use non-intersecting cmd parameter values
> > for the new calls, which avaids the special flag, and leaves the
> > backward compatability without adding grundles of new system calls.
> 
> What about source-level compatibility, which IMO is a good thing,
> at least if it doesn't add too much complexity (it clearly doesn't
> in this case)? Also, handling single flag should be easier from
> the coding perspective than a load of new values, after all
> we can do something like:
> 
> #define IPC_STAT_OLD    0xXY
> #define IPC_SET_OLD     0xZW
> [...]
> 
> #define IPC_64          0x100
> 
> #define IPC_STAT        (IPC_STAT_OLD | IPC_64)
> #define IPC_SET         (IPC_SET_OLD | IPC_64)
> [...]
> 
> Which automagically will bring 64-version of syscalls after
> recompilation, while retaining ABI compatibility.

This is exactly what I was suggesting.  In Linux, you do this manually
(read their header files).

-- Terry

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message