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Date:      Thu, 14 Jun 2018 07:20:17 +0800
From:      blubee blubeeme <gurenchan@gmail.com>
To:        Valeri Galtsev <galtsev@kicp.uchicago.edu>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: How to detect single user mode in FreeBSD ?
Message-ID:  <CALM2mEk9oVaswyAPLoe1G+gO1Ftyw0NOt_0eksn68m5mE0tHtQ@mail.gmail.com>
In-Reply-To: <d4130902-917c-39d4-979a-87c3769bb620@kicp.uchicago.edu>
References:  <e9731c0f-1269-8919-836a-29b9a2f6b0dc@yandex.com> <c0718db9-8b46-2301-a770-cd334cbf0f07@ShaneWare.Biz> <f66e1b62-a6d5-c969-78ca-3ae9eb82efc5@yandex.com> <20180613141217.a3ab7160a55398bf5ed56ef2@sohara.org> <d4130902-917c-39d4-979a-87c3769bb620@kicp.uchicago.edu>

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On Wed, Jun 13, 2018, 22:49 Valeri Galtsev <galtsev@kicp.uchicago.edu>
wrote:

>
>
> On 06/13/18 08:12, Steve O'Hara-Smith wrote:
> > On Wed, 13 Jun 2018 18:04:08 +0530
> > Manish Jain <jude.obscure@yandex.com> wrote:
> >
> >> Tx for replying. But don't you think there should ideally be a sysctl to
> >> be detect the runlevel, particularly single user mode ? It makes things
> >
> >       The runlevel concept comes from sysV init, it isn't a BSD thing at
> > all. There isn't a real difference at all between single user and multi
> > user. Single user mode is really just one of two states - before enabling
> > ttys and running the rc scripts with start or after disabling the ttys
> and
> > running the rc.shutdown script. There's nothing special about it.
> >
> >       If you feel a need to test for single user then you should probably
> > be testing for something else - such as whether a filesystem is mounted
> > before running fsck on it which is what really matters and is completely
> > independent of whether or not the system is running multi-user.
> >
> Thanks, Steve, for great explanation!
>
> Being Linux refugee myself I know the gang from inside: we fall into
> wide spread of the spectrum, from learning hard (or re-learning and
> expanding knowledge in case of those of us who had a journey from UNIX
> to Linus and back) to actively demanding introduction into FreeBSD of
> familiar things: Linuxisms. Explanations like yours always are
> ultimately teach Linux refugees what FreeBSD is, and hopefully makes
> them (us ;-) stop demanding introduction of Linuxisms into FreeBSD.
>

I can't agree with you more. FreeBSD isn't a Linux distribution.

>
> Valeri
> --
> ++++++++++++++++++++++++++++++++++++++++
> Valeri Galtsev
> Sr System Administrator
> Department of Astronomy and Astrophysics
> Kavli Institute for Cosmological Physics
> University of Chicago
> Phone: 773-702-4247
> ++++++++++++++++++++++++++++++++++++++++
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