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#!/bin/sh
#
# /etc/rc.d/rc.ak820-lcd: show CPU/GPU temperature and time on the
# Ajazz AK820 Pro TFT screen.
#
# To start at boot, make this script executable and add to /etc/rc.d/rc.local:
# [ -x /etc/rc.d/rc.ak820-lcd ] && /etc/rc.d/rc.ak820-lcd start
# and to /etc/rc.d/rc.local_shutdown:
# [ -x /etc/rc.d/rc.ak820-lcd ] && /etc/rc.d/rc.ak820-lcd stop
PIDFILE=/var/run/ak820-lcd.pid
# Extra options for "ak820-ctl lcd", e.g. "--interval 5 --max-interval 60".
LCD_OPTS=""
running() {
[ -r $PIDFILE ] && kill -0 $(cat $PIDFILE) 2>/dev/null
}
start() {
if running ; then
echo "ak820-lcd is already running."
return
fi
echo "Starting ak820-lcd."
# ak820-ctl exits when the keyboard is unplugged or the upload fails, so
# restart it in a loop. setsid makes the loop a process group leader,
# which lets stop() kill the loop and ak820-ctl together. Progress
# output goes to /dev/null, errors to syslog.
setsid /bin/sh -c "while : ; do
/usr/bin/ak820-ctl lcd $LCD_OPTS 2>&1 >/dev/null | /usr/bin/logger -t ak820-lcd
sleep 30
done" </dev/null >/dev/null 2>&1 &
echo $! > $PIDFILE
}
stop() {
if running ; then
echo "Stopping ak820-lcd."
kill -- -$(cat $PIDFILE)
fi
rm -f $PIDFILE
}
case "$1" in
start) start ;;
stop) stop ;;
restart) stop ; sleep 1 ; start ;;
status)
if running ; then
echo "ak820-lcd is running."
else
echo "ak820-lcd is stopped."
exit 1
fi
;;
*) echo "usage: $0 start|stop|restart|status" ; exit 1 ;;
esac
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