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#!/bin/sh
set -e
#DEBHELPER#
# do some udev tricks to make rule effective without reboot if it's not an upgrade
if [ "$1" = configure ] && [ -n "$2" ]; then
# change udev rule action to 'change' instead of 'add', to have a safer udevadm trigger
sed -i 's/^ACTION=="add"/ACTION=="change"/g' /usr/lib/udev/rules.d/90-backlight.rules
# reload and trigger rules to make it effective without a reboot
udevadm control --reload
udevadm trigger --subsystem-match=backlight --subsystem-match=leds --action=change --settle
# reset udev rule action back to 'add'
sed -i 's/^ACTION=="change"/ACTION=="add"/g' /usr/lib/udev/rules.d/90-backlight.rules
# reload rules again to make sure original behavior is kept without a reboot
udevadm control --reload
fi
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