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#!/bin/sh
# Copyright (c) 2016 DisplayLink (UK) Ltd.
# File autogenerated by udev-installer.sh script
get_evdi_dev_count()
{
if [ "$(ls -l /sys/devices/platform/* | grep evdi | wc -l)" = "0" ]; then
echo "0"
return
fi
cat /sys/devices/platform/evdi.*/drm/card*/card*/status | grep "^connected$" | wc -l
}
get_displaylink_dev_count()
{
cat /sys/bus/usb/devices/*/idVendor | grep 17e9 | wc -l
}
start_displaylink()
{
if [ "$(get_displaylink_dev_count)" != "0" ]; then
start_service
fi
}
try_stop_displaylink()
{
if [ "$(get_evdi_dev_count)" = "0" ]; then
parent_dev_path="$1"
if [ -d "$parent_dev_path" ]; then
echo "1"
return
fi
if [ "$(get_displaylink_dev_count)" = "0" ]; then
stop_service
echo "0"
return
fi
fi
echo "1"
}
stop_displaylink()
{
parent_devpath=$(dirname /sys$1)
retry_num="50" # 5s
while [ "$(try_stop_displaylink $parent_devpath)" != "0" ] && [ "$retry_num" != "0" ];
do
sleep 0.1
retry_num=$((retry_num-1))
done
}
main()
{
op=$1
devpath=$2
if [ "$op" = "START" ]; then
start_displaylink
elif [ "$op" = "STOP" ]; then
stop_displaylink $devpath
fi
}
start_service()
{
sh /etc/rc.d/rc.displaylink start &
}
stop_service()
{
sh /etc/rc.d/rc.displaylink stop &
}
main $1 $2
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