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Date:      Tue, 29 Jun 2010 10:32:52 -0500
From:      "Rick C. Petty" <rick-freebsd2009@kiwi-computer.com>
To:        Adam Vande More <amvandemore@gmail.com>
Cc:        Rick Macklem <rmacklem@uoguelph.ca>, freebsd-stable@freebsd.org, Ian Smith <smithi@nimnet.asn.au>
Subject:   Re: Why is NFSv4 so slow? (root/toor)
Message-ID:  <20100629153252.GA71786@kay.kiwi-computer.com>
In-Reply-To: <AANLkTimjDIQ4FRYAD3N_L1C1VermRX3S1PhvG5dSvz5A@mail.gmail.com>
References:  <20100627221607.GA31646@kay.kiwi-computer.com> <Pine.GSO.4.63.1006271949220.3233@muncher.cs.uoguelph.ca> <20100628031401.GA45282@kay.kiwi-computer.com> <Pine.GSO.4.63.1006280017190.2680@muncher.cs.uoguelph.ca> <20100628140054.GA52174@kay.kiwi-computer.com> <Pine.GSO.4.63.1006281950260.13834@muncher.cs.uoguelph.ca> <20100629134033.O9227@sola.nimnet.asn.au> <Pine.GSO.4.63.1006291054350.24800@muncher.cs.uoguelph.ca> <AANLkTimjDIQ4FRYAD3N_L1C1VermRX3S1PhvG5dSvz5A@mail.gmail.com>

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On Tue, Jun 29, 2010 at 10:20:57AM -0500, Adam Vande More wrote:
> On Tue, Jun 29, 2010 at 9:58 AM, Rick Macklem <rmacklem@uoguelph.ca> wrote:
> 
> > I suppose if the FreeBSD world feels that "root" and "toor" must both
> > exist in the password database, then "nfsuserd" could be hacked to handle
> > the case of translating uid 0 to "root" without calling getpwuid(). It
> > seems ugly, but if deleting "toor" from the password database upsets
> > people, I can do that.
> 
> I agree with Ian on this.  I don't use toor either, but have seen people use
> it, and sometimes it will get recommended here for various reasons e.g.
> running a root account with a different default shell.  It wouldn't bother
> me having to do this provided it was documented, but having to do so would
> be a POLA violation to many users I think.

To be fair, I'm not sure this is even a problem.  Rick M. only suggested it
as a possibility.  I would think that getpwuid() would return the first
match which has always been root.  At least that's what it does when
scanning the passwd file; I'm not sure about NIS.  If someone can prove
that this will cause a problem with NFSv4, we could consider hackingit.
Otherwise I don't think we should change this behavior yet.

-- Rick C. Petty



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