Re: sysctl to prevent reboot?

From: Warner Losh <imp_at_bsdimp.com>
Date: Thu, 10 Jul 2025 14:01:57 UTC
On Thu, Jul 10, 2025, 7:52 AM Bjoern A. Zeeb <bzeeb-lists@lists.zabbadoz.net>
wrote:

> On Thu, 10 Jul 2025, Zhenlei Huang wrote:
>
> Hi,
>
> > I believe Konstantin's work [1] and  [2] are precisely what you need.
> >
> > [1]
> https://cgit.freebsd.org/src/commit/?id=7fb88c20eccc3fd2118fda2ba58d7afe2b87f7e3
> <
> https://cgit.freebsd.org/src/commit/?id=7fb88c20eccc3fd2118fda2ba58d7afe2b87f7e3>
>  shutdown(8): refuse to run if /var/run/noshutdown is present
> > [2]
> https://cgit.freebsd.org/src/commit/?id=384d976725a5c29734a9227fcdb6ef0807485c91
> <
> https://cgit.freebsd.org/src/commit/?id=384d976725a5c29734a9227fcdb6ef0807485c91>
> rc.d: Add precious_machine rc.conf knob to create /var/run/noshutdown
>
> Thanks!  I was looking in the wrong place.
>
> That doesn't catch reboot, does it?  For me that's the offending command
> as I type that at the loader prompt (if I am in the correct window).
>

'alias reboot shurdown -r' has other benefits as well

Warner

/bz
>
> --
> Bjoern A. Zeeb                                                     r15:7
>
>