Date: Mon, 25 Jan 1999 13:28:28 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Mike Smith <mike@smith.net.au> Cc: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/sys/kern kern_mib.c Message-ID: <199901252128.NAA07749@apollo.backplane.com> References: <199901251918.LAA11257@dingo.cdrom.com>
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:Er, Matt, this is extremely ill-advised. The kernel's private sysctl
:space is *not* for use as a persistent environment store.
:
:For just about everything that rc.diskless needs, the process
:environment is more than adequate.
:
:If you feel a need to be able to pass this in, it should be seeded out
:of the kernel environment and set by the loader, then extracted using
:sysctl under kern.environment.
:
:Please consider an alternative method for passing this value around
:that doesn't involve polluting a totally inappropriate namespace.
Well, the reason I put it in there is because more and more administrative
scripts seem to be using rc.conf.
For example, 'ndc restart'. System rc.conf effectively controls the
entire startup configuration of the system, I think it would be really
excellent to actually *use* it in the same capacity for ongoing control of
the system. For example, we could eventually use this to hook realtime
reconfiguration, monitoring, and watchdog functions into the system.
I can't think of any other way to propogate the location of a local
rc configuration file that doesn't require writing some persistent
state to disk ( which I think would be bad, not to mention not working
in a mostly read-only boot environment ).
I'm not rabid about it, but whatever solution we come up with needs to
be at least as effective.
-Matt
:> dillon 1999/01/25 10:26:09 PST
:>
:> Modified files:
:> sys/kern kern_mib.c
:> Log:
:> Add kern.conf_dir sysctl. This is a R+W string used to specify the
:> directory containing rc.conf.local and rc.local, and possibly other
:> things in the future.
:>
:> This sysctl is used by the diskless startup code and new rc.conf. If
:> it cannot be found or is empty, the system should revert to using /etc.
:>
:> Revision Changes Path
:> 1.17 +6 -1 src/sys/kern/kern_mib.c
:>
:
:--
:\\ Sometimes you're ahead, \\ Mike Smith
:\\ sometimes you're behind. \\ mike@smith.net.au
:\\ The race is long, and in the \\ msmith@freebsd.org
:\\ end it's only with yourself. \\ msmith@cdrom.com
:
:
:
Matthew Dillon
<dillon@backplane.com>
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