Date: Tue, 29 Sep 2009 15:46:56 +0200 From: Daniel Braniss <danny@cs.huji.ac.il> To: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> Cc: FreeBSD Current <freebsd-current@freebsd.org>, d@delphij.net Subject: Re: [PATCH] Shutdown cooloff feature Message-ID: <E1Msd2e-0008MR-0w@kabab.cs.huji.ac.il> In-Reply-To: <86fxa6gg8l.fsf@ds4.des.no> References: <4AC141B0.4090705@delphij.net> <E1MsXso-0005Eg-CY@kabab.cs.huji.ac.il> <86fxa6gg8l.fsf@ds4.des.no>
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> > Xin LI <delphij@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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