From owner-freebsd-current  Wed Nov 15 12:39:54 1995
Return-Path: owner-current
Received: (from root@localhost)
          by freefall.freebsd.org (8.6.12/8.6.6) id MAA22610
          for current-outgoing; Wed, 15 Nov 1995 12:39:54 -0800
Received: from GndRsh.aac.dev.com (GndRsh.aac.dev.com [198.145.92.241])
          by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id MAA22581
          for <current@freebsd.org>; Wed, 15 Nov 1995 12:39:49 -0800
Received: (from rgrimes@localhost) by GndRsh.aac.dev.com (8.6.12/8.6.12) id MAA19557; Wed, 15 Nov 1995 12:39:22 -0800
From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com>
Message-Id: <199511152039.MAA19557@GndRsh.aac.dev.com>
Subject: Re: cvs commit: src/usr.sbin/syslogd syslogd.c
To: wollman@lcs.mit.edu (Garrett A. Wollman)
Date: Wed, 15 Nov 1995 12:39:22 -0800 (PST)
Cc: davidg@Root.COM, current@freebsd.org
In-Reply-To: <9511151653.AA26197@halloran-eldar.lcs.mit.edu> from "Garrett A. Wollman" at Nov 15, 95 11:53:34 am
X-Mailer: ELM [version 2.4 PL24]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Content-Length: 1479      
Sender: owner-current@freebsd.org
Precedence: bulk

> 
> <<On Wed, 15 Nov 1995 05:54:22 -0800, David Greenman <davidg@Root.COM> said:
> 
> >    The sysctl crap in the Makefile is bogus and should be removed. My kernel
> > is often not called "/kernel" and pretending that it was is wrong. The bootfile
> > name should be read-only and the Makefile should not be messing with it.
> 
> No, the bootfile name should not be read-only; I knew what I was doing
> when I wrote that code.

Agree.

> Yes, the Makefile should not be messing with
> it.

Disagree, but it should be very carefull about messing with it:

        mv /kernel /kernel.old
        kernel=`sysctl kern.bootfile`
        if [ "X${kernel}" = "X/kernel"  ]; then
                sysctl -w kern.bootfile=/kernel.old
        fi

> The reason for making the bootfile name not be read-only is to allow
> LKMs to leave their symbol-files in some convenient place and set
> kern.bootfile to point there, so that other programs like `modload'
> and `netstat' are able to find it.

Likewise if make install does overwrite the running kernel but saves a
copy of it first kern.bootfile should point to this saved copy, otherwise
strange things can and _DO_ happen.  A lot of code now gets the running
kernel name from sysctl, and to screw this over due to lack of dilligenance
in the kernel install: target is just silly.


-- 
Rod Grimes                                      rgrimes@gndrsh.aac.dev.com
Accurate Automation Company                 Reliable computers for FreeBSD