szarp-iks transition from init.d to systemd

+ service is installed in /etc/ so we can customize it without adding extra config files

debian/services/websockify.service

+# This service file is installed in /etc/systemd/system on purpose,
+# so that you may edit this file and a package upgrade
+# won't overwrite your custom changes.
+
+[Unit]
+Description=Websockify service
+After=network.target
+StartLimitIntervalSec=0
+
+[Service]
+Type=simple
+User=root
+ExecStart=/usr/bin/websockify 19002 localhost:9002
+Restart=always
+RestartSec=3
+
+[Install]
+WantedBy=multi-user.target

debian/szarp-iks.init

-#! /bin/sh
-### BEGIN INIT INFO
-# Provides:          iks
-# Required-Start:    $remote_fs $syslog
-# Required-Stop:     $remote_fs $syslog
-# Default-Start:     2 3 4 5
-# Default-Stop:      0 1 6
-# Short-Description: SZARP iks system
-# Description:       Starts all necessary services for szarp-iks system. Right now its websockify only because iks-server has its own init script.
-### END INIT INFO
-
-# Author: Jakub Kotur <qba@newterm.pl>
-
-split () {
-	PATH=/sbin:/usr/sbin:/bin:/usr/bin
-	cnt=0
-	tmp_ifs="$1"
-	index="$2"
-	string="$3"
-	
-	IFS=$tmp_ifs	
-	for line in $string; do 
-		if [ $cnt -eq $index ]; then
-			echo $line
-		fi
-		cnt=`expr $cnt + 1`
-	done
-	unset IFS
-}
-
-get_iks_port () {
-	PATH=/sbin:/usr/sbin:/bin:/usr/bin
-	subsection=0
-	default_port=9002
-	ini="/etc/szarp/iks-server.ini"
-	if [ ! -e "$ini" ]; then
-		echo $default_port
-		exit 0
-	fi
-	while read line; do
-		prefix=`echo $line | cut -c1`
-		if [ "$prefix" = "[" ]; then
-			subsection=1
-		fi
-		prefix=`echo $line | cut -c1-4`
-		if [ "$prefix" = "port" ]; then
-			if [ $subsection -eq 0 ]; then
-				port=$(split "=" "1" "$line")
-				echo $port
-				exit 0
-			fi
-		fi
-	done < $ini
-	echo $default_port
-}
-
-PATH=/sbin:/usr/sbin:/bin:/usr/bin
-DESC="SZARP iks system"
-NAME=szarp-iks
-PIDFILE=/var/run/$NAME.pid
-DAEMON=/usr/bin/websockify
-SCRIPTNAME=/etc/init.d/$NAME
-CONF_IKS_PORT="$(get_iks_port)"
-
-[ -x "$DAEMON" ] || exit 0
-[ -r /etc/default/$NAME ] && . /etc/default/$NAME
-
-. /lib/init/vars.sh
-. /lib/lsb/init-functions
-
-: ${WEBSOCKET_PORT:=19002}
-: ${IKS_PORT:=$CONF_IKS_PORT}
-
-DAEMON_ARGS="$WEBSOCKET_PORT localhost:$IKS_PORT"
-
-#
-# Always be verbose
-#
-VERBOSE=yes
-
-#
-# Function that starts the daemon/service
-#
-do_start()
-{
-	# Return
-	#   0 if daemon has been started
-	#   1 if daemon was already running
-	#   2 if daemon could not be started
-	start-stop-daemon --status --quiet --pidfile $PIDFILE \
-		&& return 1
-	start-stop-daemon --start -q -b -m -p $PIDFILE --exec $DAEMON -- $DAEMON_ARGS \
-		|| return 2
-}
-
-#
-# Function that stops the daemon/service
-#
-do_stop()
-{
-	# Return
-	#   0 if daemon has been stopped
-	#   1 if daemon was already stopped
-	#   2 if daemon could not be stopped
-	#   other if a failure occurred
-	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE
-	RETVAL="$?"
-	[ "$RETVAL" = 2 ] && return 2
-
-	start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
-	[ "$?" = 2 ] && return 2
-
-	rm -f $PIDFILE
-	return "$RETVAL"
-}
-
-#
-# Function that sends a SIGHUP to the daemon/service
-#
-do_reload() {
-	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
-	return 0
-}
-
-case "$1" in
-  start)
-	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
-	do_start
-	case "$?" in
-		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
-		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
-	esac
-	;;
-  stop)
-	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
-	do_stop
-	case "$?" in
-		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
-		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
-	esac
-	;;
-  status)
-	status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
-	;;
-  #reload|force-reload)
-	#log_daemon_msg "Reloading $DESC" "$NAME"
-	#do_reload
-	#log_end_msg $?
-	#;;
-  restart|force-reload)
-
-	log_daemon_msg "Restarting $DESC" "$NAME"
-	do_stop
-	case "$?" in
-	  0|1)
-		do_start
-		case "$?" in
-			0) log_end_msg 0 ;;
-			1) log_end_msg 1 ;; # Old process is still running
-			*) log_end_msg 1 ;; # Failed to start
-		esac
-		;;
-	  *)
-		# Failed to stop
-		log_end_msg 1
-		;;
-	esac
-	;;
-  *)
-	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
-	exit 3
-	;;
-esac
-
-:

debian/szarp-iks.install

+../services/websockify.service /etc/systemd/system/

debian/szarp-iks.postinst

+#!/bin/sh
+
+systemctl unmask websockify
+systemctl enable websockify
+systemctl start websockify

debian/szarp-iks.prerm

+#!/bin/sh
+
+systemctl stop websockify
+systemctl disable websockify