[PATCH] Shutdown cooloff feature
Daniel Braniss
danny at cs.huji.ac.il
Tue Sep 29 13:46:58 UTC 2009
> > Xin LI <delphij at delphij.net> writes:
> > > I'm not sure if anyone would find this useful:
> > > > > > - If a shutdown is initiated from a tty -and-
> > > - It's not a restart -and-
> > > - The time parameter is set to "now"
> > >
> > > Then, the shutdown(8) program would give something like this:
> > >
> > > Shutting down <hostname> NOW, press ^C within 5 seconds to cancel...
> > >
> > > So the user would get a chance to terminate it before it's too late.
> > I know we are living in a virtual world, where even shutting down
> > a computer is just a 'wish', but lets keep some sanity, now means now.
> The "now" is not an issue; I think his point is that you *really* don't
> want to accidentally type "shutdown -h now" or "shutdown now" instead of
> "shutdown -r now" in an ssh session to a remote system - especially at 6
> pm on a Friday night when the machine is in a colo center that's only
> manned during business hours.
I understand what is at stake, my problem is that in other *Unixes, sysV/Solaris
'shutdown now' is actually sometime in the future :-), and it does not help
much if you are far away and the link is slow, so the 5 sec. grace is actually
taken up by the bandwidth - or you are connected via an iphone, how do you
hit ^C :-)
what if the machine is compromised and you really want to power it off,
now the intruder has another 5 seconds ...
thankfully +0 works, or are there plans to change that too? :-)
careful! bikeshead ahead
cheers,
danny
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