Date: Tue, 26 Nov 1996 16:10:53 +1100 (EST) From: "Daniel O'Callaghan" <danny@panda.hilink.com.au> To: Bruce Evans <bde@zeta.org.au> Cc: hackers@FreeBSD.org Subject: Re: Hang your machine with ScrollLock Message-ID: <Pine.BSF.3.91.961126154551.1605A-100000@panda.hilink.com.au> In-Reply-To: <199611260210.NAA20353@godzilla.zeta.org.au>
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On Tue, 26 Nov 1996, Bruce Evans wrote: > >> > > As soon as I hit the scroll-lock key, everything was fine- > >> > > all of the uptime processes completed, and name serving > >> > > went on as usual. > >> > >> I belive this to be fixed in what was 2.2-current long ago... > > Nope. There is no bug to fix. Scroll lock says to stop output, so the > tty buffer fills up after a while and the tty driver sleeps on "ttywri". > > Workaround: `comcontrol /dev/console drainwait 10' times out the sleep > after 10 seconds. write() returns -1/EIO or a short count. Applications > may be confused by this. EIO normally means hangup. Would it be possible to put a timeout on the scroll lock, such that after 10 minutes the state is toggled back to 'off'? Danny
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