How to detect single user mode in FreeBSD ?
gurenchan at gmail.com
Wed Jun 13 23:20:15 UTC 2018
On Wed, Jun 13, 2018, 22:49 Valeri Galtsev <galtsev at kicp.uchicago.edu>
> On 06/13/18 08:12, Steve O'Hara-Smith wrote:
> > On Wed, 13 Jun 2018 18:04:08 +0530
> > Manish Jain <jude.obscure at 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
> > 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 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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