I'd like to turn on a relay to the power for my laserprinter 3 rooms away
where the server is located.
I have an i/o board with a 8255 24 bit i/o port.(IIRC)
So I wrote a simple userland program to do inb/outb, but it dumped core with
BUSERR, I presume because userland is not supposed to do i/o to the
hardware.
I guess I have these options:
A: write a driver/kernel module to access the port.
B: use an extra parallel port. (I use 2 at the moment)
C: use a serial port; I have 3-4 available.
What would be the simplest to interface from a shellscript, i.e. the spooler
to turn on and off the printer? (The relay has a turn-off delay, so I don't
have to worry about turning off the power after everything has been sent,
but the printer not finished, or turning off/on between printjobs)
Leif
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