On Tue, Dec 11, 2001 at 01:46:11PM +0900, Olaf Meeuwissen wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Olaf Meeuwissen <[EMAIL PROTECTED]> wrote: > > > I'm maintaining a (small-time) group server for our department. In > > order to satisfy company policy requirements I need to provide a way > > to shutdown the server in case of emergencies. Our network admin was > > kind enough to give me two alternatives: > > > > 1) provide an on-screen shutdown button > > 2) provide a shutdown user account (and document its usage) > > > > Suggestions, discussions of pros and cons welcome, > > Thanks to everyone who responded. I should have been a little clearer > on the system setup. The machine in question consists of a main unit > and a bunch of externally attached hard disks connected to a network. > It has no monitor, keyboard (what Ctrl-Alt-Del?) and mouse.
That is pretty simple :-) run this script during the boot with "nohup /dir/send.sh &" --- begin of send.sh --- #!/bin/sh while true; do echo -n "pzn" > /dev/ttyS0 #send 3 bytes to serial port sleep 1 done --- end of send.sh --- and also run this during boot "nohup /dir/receive.sh &" --- begin of receive.sh --- #!/bin/sh head -c 9 /dev/ttyS0 #waits to receive 9 bits from serial port echo -n "\007" > /dev/console #beep the pcspeaker sleep 1 echo -n "\007" > /dev/console #beep the pcspeaker sleep 1 halt #shutdown the system --- end of receive.sh --- then put a switch that when pressed shorts pins 2 and 3 of your serial port /dev/ttyS0. that is it. just press the switch for 3 seconds to shutdown the machine. if it does not work, then configure setserial to use "no flow control" on /dev/ttyS0 Good luck, Pedro
