Improve init script by supporting all LSB requirements

runner/defaults

-DEPLOY_DIR="/var/www/cron-control-runner"
-CMD="${DEPLOY_DIR}/runner"
-CMD_ARGS="-workers-run 10"
+# DAEMON_ARGS="-workers-run 10"

runner/init.sh

@@ -2,69 +2,86 @@
 ### BEGIN INIT INFO
 # Provides:          cron-control-runner
 # Required-Start:    $network $local_fs
-# Required-Stop:
+# Required-Stop:     $network $local_fs
 # Default-Start:     2 3 4 5
 # Default-Stop:      0 1 6
 # Short-Description: Runner for Cron Control events
-# Description:       Automattic Inc
-#### END INIT INFO
+# Description:       Runner for Cron Control events
+### END INIT INFO
+
+. /lib/lsb/init-functions
 
 NAME=cron-control-runner
 USER=www-data
-DEPLOY_DIR="/var/lib/cron_control_runner"
-CMD="${DEPLOY_DIR}/runner"
-CMD_ARGS=""
-
-########## Common
-PATH=/sbin:/bin:/usr/sbin:/usr/bin:$PATH
-SSD=start-stop-daemon
-PID=/var/run/${NAME}.pid
+DAEMON="/usr/local/bin/${NAME}"
+DAEMON_ARGS=""
+PIDFILE="/var/run/${NAME}.pid"
 
-########## Overrides
+# Overrides
 [ -f "/etc/default/$NAME" ] && . /etc/default/$NAME
 
-start () {
-    echo "Starting $NAME"
-    $SSD --start --chuid $USER --pidfile $PID --make-pidfile --background -d $DEPLOY_DIR --exec $CMD -- $CMD_ARGS
-    RETVAL=$?
-    echo
-    return $RETVAL
-}
-
-stop () {
-    echo "Stopping $NAME"
-    $SSD --stop --oknodo --pidfile $PID
-    RETVAL=$?
-    echo
-    return $RETVAL
-}
-
-restart () {
-    stop
-    sleep 1
-    start
-}
-
-case "$1" in
-start)
-    start
-    ;;
-
-stop)
-    stop
-    ;;
-
-status)
-    echo "not supported"
-    ;;
-
-restart)
-    restart
-    ;;
-
-*)
-    echo "Usage: $0 {start|stop|restart}"
-    exit 1
-esac
+# If the daemon is not there, then exit.
+test -x $DAEMON || exit 5
 
-exit $RETVAL
+case $1 in
+ start)
+  # Checked the PID file exists and check the actual status of process
+  if [ -e $PIDFILE ]; then
+   status_of_proc -p $PIDFILE $DAEMON "$NAME process" && status="0" || status="$?"
+   # If the status is SUCCESS then don't need to start again.
+   if [ $status = "0" ]; then
+    exit # Exit
+   fi
+  fi
+  # Start the daemon.
+  log_daemon_msg "Starting the process" "$NAME"
+  # Start the daemon with the help of start-stop-daemon
+  # Log the message appropriately
+  if start-stop-daemon --start --chuid $USER --background --oknodo --pidfile $PIDFILE --make-pidfile --exec $DAEMON -- $DAEMON_ARGS; then
+   log_end_msg 0
+  else
+   log_end_msg 1
+  fi
+  ;;
+ stop)
+  # Stop the daemon.
+  if [ -e $PIDFILE ]; then
+   status_of_proc -p $PIDFILE $DAEMON "Stoppping the $NAME process" && status="0" || status="$?"
+   if [ "$status" = 0 ]; then
+    start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE
+    /bin/rm -rf $PIDFILE
+   fi
+  else
+   log_daemon_msg "$NAME process is not running"
+   log_end_msg 0
+  fi
+  ;;
+ restart)
+  # Restart the daemon.
+  $0 stop && sleep 2 && $0 start
+  ;;
+ status)
+  # Check the status of the process.
+  if [ -e $PIDFILE ]; then
+   status_of_proc -p $PIDFILE $DAEMON "$NAME process" && exit 0 || exit $?
+  else
+   log_daemon_msg "$NAME Process is not running"
+   log_end_msg 0
+  fi
+  ;;
+ reload)
+  # Reload the process. Basically sending some signal to a daemon to reload
+  # it configurations.
+  if [ -e $PIDFILE ]; then
+   start-stop-daemon --stop --signal USR1 --quiet --pidfile $PIDFILE --name $NAME
+   log_success_msg "$NAME process reloaded successfully"
+  else
+   log_failure_msg "$PIDFILE does not exists"
+  fi
+  ;;
+ *)
+  # For invalid arguments, print the usage message.
+  echo "Usage: $0 {start|stop|restart|reload|status}"
+  exit 2
+  ;;
+esac
\ No newline at end of file