Date: Tue, 02 May 2000 09:56:26 +0100 From: "Koster, K.J." <K.J.Koster@kpn.com> To: 'Rob Fowler' <rjf@cs.rice.edu>, hardware@FreeBSD.ORG Subject: RE: [Fwd: someone has an idea ?] Message-ID: <59063B5B4D98D311BC0D0001FA7E452201313B3C@l04.research.kpn.com>
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Signalling is easy, use /dev/speaker. You can write whole songs in simple
basic tunes. :-)
It's in use at TCCN in Nijmegen (NL) to signal that the printer servers are
available. I forget what song they use, but I'm sure you can come up with
something.
Kees Jan
==============================================
You are only young once,
but you can stay immature all your life
> -----Original Message-----
> From: Rob Fowler [mailto:rjf@cs.rice.edu]
> Sent: vrijdag 28 april 2000 20:42
> To: hardware@FreeBSD.ORG
> Subject: [Fwd: someone has an idea ?]
>
>
> It's easy if the operator can come in over the net, but if
> you want a "front-panel
> shutdown" function on a box without keyboard or other obvious
> I/O devices,
> you'll have to make do with what your hardware has. If there
> is a button or switch
> you can use as a sensor, then all you need is a demon
> monitoring that function.
> This may require hardware and/or software hacking.
>
> A couple of years ago we were running a small keyboard-less
> cluster that was usually
> FreeBSD, but occasionally had to be brought up under Linux.
> The solution was to
> use the presence absence of a LILO floppy as the control for
> bringing the
> system up. The drill was to put LILO floppies in all the
> drives (or remove them)
> and force reboots over the net through a script. Sleazy, but
> effective.
>
> If the floppy drive is not being used, you might try the
> inverse of the floppy trick.
> Write a script that tries to open a file called
> <obscure_name> on the floppy and halts
> if successful. Run it under cron with an appropriate
> interval, or just wrap it
> in sleep loop and start the script when the system boots.
> Tell the operator to
> stick the bright red floppy in the drive and wait xx seconds
> before powering down.
>
> The tricky thing may be signalling the operator when it
> really is OK to power down. If
> the box is new enough to shut itself off on a halt, then
> you're done. Otherwise,
> you may have to have the kernel beep a couple of times after
> it's done sync'ing.
>
> -- Rob
>
> >
> > On 28-Apr-00 Philippe Charron wrote:
> > > Hello,
> > >
> > > Im a trying to do a FreeBSD box without any keyboard
> (this machine will
> > > be a Squid, HTTP and FTP serveur for non specialist
> person that can't
> > > handle with a Unix system).
> > >
> > > As the user can't shutdown properly the computer, he has
> to press the
> > > power button to switch off the box.
> > > This leads to problems with fsck and inode lost in the system.
> > >
> > > Does anyone have an idea to solve this problem ?
> > >
> > > Thanx in avance
> > > Philippe
> > >>
> >
>
>
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