Date: Wed, 13 Jun 2018 09:46:47 -0500 From: Valeri Galtsev <galtsev@kicp.uchicago.edu> To: freebsd-questions@freebsd.org Subject: Re: How to detect single user mode in FreeBSD ? Message-ID: <d4130902-917c-39d4-979a-87c3769bb620@kicp.uchicago.edu> In-Reply-To: <20180613141217.a3ab7160a55398bf5ed56ef2@sohara.org> 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>
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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. 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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