Date: Fri, 2 Oct 2009 10:38:20 -0400 From: "illoai@gmail.com" <illoai@gmail.com> To: Daniel Braniss <danny@cs.huji.ac.il> Cc: =?ISO-8859-1?Q?Dag=2DErling_Sm=F8rgrav?= <des@des.no>, FreeBSD Current <freebsd-current@freebsd.org>, d@delphij.net Subject: Re: [PATCH] Shutdown cooloff feature Message-ID: <d7195cff0910020738h44a91dafydfb6f2f98853e8ec@mail.gmail.com> In-Reply-To: <E1Msd2e-0008MR-0w@kabab.cs.huji.ac.il> References: <4AC141B0.4090705@delphij.net> <E1MsXso-0005Eg-CY@kabab.cs.huji.ac.il> <86fxa6gg8l.fsf@ds4.des.no> <E1Msd2e-0008MR-0w@kabab.cs.huji.ac.il>
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2009/9/29 Daniel Braniss <danny@cs.huji.ac.il>: >> > Xin LI <delphij@delphij.net> writes: >> > > I'm not sure if anyone would find this useful: >> > > > > > =A0- If a shutdown is initiated from a tty -and- >> > > =A0- It's not a restart -and- >> > > =A0- 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 he= lp > much if you are far away and the link is slow, so the 5 sec. grace is act= ually > taken up by the bandwidth - or you are connected via an iphone, how do yo= u > 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 % cat ~/bin/bikeshed #!/bin/sh echo "It's all gone pear-shaped!" sleep 5 shutdown -p now --=20 --
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