From owner-freebsd-current@freebsd.org  Fri Apr 21 12:56:31 2017
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Date: Fri, 21 Apr 2017 22:56:20 +1000 (EST)
From: Bruce Evans <brde@optusnet.com.au>
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To: Rick Macklem <rmacklem@uoguelph.ca>
cc: "freebsd-current@freebsd.org" <freebsd-current@freebsd.org>, 
 Bruce Evans <bde@freebsd.org>
Subject: Re: kernel coding of nobody/nogroup
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On Fri, 21 Apr 2017, Rick Macklem wrote:

> I need to set the default uid/gid values for nobody/nogroup into kernel
> variables. I reverted the commit that hardcoded them, since I agree that
> wasn't a good thing to do.
>
> I didn't realize that "nobody" was already defined in sys/conf.h and I can
> use that.

I didn't know nobody was already there either.  They are only used by zfs,
while the others were originally only sed for devices.

> There is no definition for "nogroup" in sys/conf.h.
> Would it be ok to add
> #define GID_NOGROUP  65533
> to syy/conf.h?
> (I know bde@ doesn't like expressing this as 65533, but that is what it is in /etc/group.)

sys/conf.h already has GID_NOBODY but it is subtly different from
GID_NOGROUP.  It seems to be a bug that zfs uses nobody's gid instead
of the gid nogroup which is used by no body.

Bruce