hyperion.ng/cmake/debian/prerm

#!/bin/sh

echo "---Hyperion ambient light prerm ---"

# search for users in system, returns first entry
FOUND_USR=`who | grep -o '^\w*\b'` || "root"

# stop running daemon before we delete it
HYPERION_RUNNING=false
pgrep hyperiond > /dev/null 2>&1 && HYPERION_RUNNING=true

if grep -m1 systemd /proc/1/comm > /dev/null
then
	echo "---> stop init deamon: systemd"
	# systemd
	$HYPERION_RUNNING && systemctl stop hyperiond"@${FOUND_USR}" 2> /dev/null
	# disable user specific symlink
	echo "---> Disable service and remove entry"
	systemctl -q disable hyperiond"@${FOUND_USR}"
	rm -v /etc/systemd/system/hyperiond@.service 2>/dev/null

elif [ -e /sbin/initctl ]
then
	echo "---> stop init deamon: upstart"
	# upstart
	$HYPERION_RUNNING && initctl stop hyperiond
	echo "---> Remove upstart service"
	rm -v /etc/init/hyperion* 2>/dev/null
	initctl reload-configuration

else
	echo "---> stop init deamon: sysV"
	# sysV
	$HYPERION_RUNNING && service hyperiond stop 2>/dev/null
	echo "---> Remove sysV service"
	update-rc.d -f hyperion remove
	rm /etc/init.d/hyperion* 2>/dev/null
fi

# In case we don't use a service kill all instances
killall hyperiond 2> /dev/null

exit 0