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#!/bin/sh
# redirect stderr and stdout to file
exec >> /mnt/us/log 2>&1
# kill other instances of this script
me=$$
ps -ef | grep 'start.sh' | awk -v me=$me '$2 != me {print $2}' | xargs kill
echo "$(date) starting"
update_screensaver() {
echo "$(date) downloading screensaver"
#echo "$(date) enabling wifi"
#lipc-set-prop com.lab126.cmd wirelessEnable 1
for i in 1 2 3 4 5
do
curl "CHANGETHIS.png" --output /mnt/us/screensaver.png --fail --silent --show-error && break
sleep 10
done
# turning off wireless during ready to suspend causes issues with Kindle Wifi
# - the Kindle forgets the gateway, the configuration gets desynced,
# leading to the Kindle being connected but having no network
#echo "$(date) disabling wifi"
#lipc-set-prop com.lab126.cmd wirelessEnable 0
echo "$(date) updating screen"
eips -f -g /mnt/us/screensaver.png
}
LAST_UPDATE=0
lipc-wait-event -m com.lab126.powerd goingToScreenSaver,readyToSuspend | while read event
do
echo "$(date) event $event"
# throttle to 1/minute
NOW=$(date +%s)
if [ "$(($NOW - $LAST_UPDATE))" -ge 60 ]
then
# run in background so loop is not blocked
update_screensaver &
fi
LAST_UPDATE=$NOW
case "$event" in
# event looks like "goingToScreenSaver 7" so use a regex
readyToSuspend*)
echo "$(date) scheduling wakeup"
# must be called within 5s after readyToSuspend
# 60s until screensaver + 29min sleep
lipc-set-prop -i com.lab126.powerd rtcWakeup 1740
;;
goingToScreenSaver*)
;;
esac
echo "$(date) waiting for next event"
done;
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