SPARCstation Monitor
Slack is full of contradictions.
dd at mips.com
Thu Jan 10 09:54:59 AEST 1991
In article <17394 at brahms.udel.edu> gdtltr at brahms.udel.edu (root at research.bdi.com (Systems Research Supervisor)) writes:
>
> Just get a SPARC? Miss the blinking LED's on your old Sun-3?
>
> Try blink.c !
I think it's more interesting to do this with a shell script...
#! /bin/sh
# $Header: sunbell,v 1.6 90/02/14 18:43:55 david Exp $
# ring the bell or rotate the LEDs on a Sun keyboard
# D. DiGiacomo
if sun ; then
:
else
echo "`basename $0`: not a Sun"
exit 1
fi
if [ -f /lib/ld.so ] ; then
# SunOS 4.x
belldev=/dev/kbd
else
# SunOS 3.x
belldev=/dev/bell
if [ ! -c $belldev ] ; then
echo "$belldev does not exist"
echo "try \"mknod $belldev c 12 2; chmod 666 /dev/bell\""
exit 1
fi
fi
if [ ! -w $belldev ] ; then
echo "`basename $0`: $belldev is not writable"
echo "(try \"chmod 666 $belldev\")"
exit 2
fi
if (echo "x" > $belldev) 2> /dev/null ; then
:
else
echo "`basename $0`: cannot write to $belldev"
echo "(no keyboard connected?)"
exit 3
fi
case $# in
0) set - $0 ;;
esac
case "$1" in
*bell*)
echo -n "beeeeeeeeeep!" | tr 'bp!' '\002\003\013' > $belldev
;;
*[lL][eE][dD]*|*)
# rotate LEDs -- type 4 only
case "`type usleep`" in
*not*found)
sleep="sleep 1"
ledpat="8 2 4 1 4 2"
;;
*)
sleep="usleep 250m"
ledpat="8 2 4 1 0"
;;
esac
setled=`echo -n a | tr a '\016'`
noclick=`echo -n a | tr a '\013'`
trap 'echo -n "${setled}0${noclick}" > $belldev; exit' 1 2 15
while true
do
for led in $ledpat
do
echo -n "${setled}${led}${noclick}"
$sleep
done > $belldev
done
;;
esac
--
David DiGiacomo, MIPS Computer Systems, Sunnyvale, CA dd at mips.com
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