SysV_Sample

#!/bin/bash

PIDFILE=/var/run/os-<%= @name %>.pid

# Start the service
start() {
    if [ -f $PIDFILE ]; then
      echo "<%= @name %> already running, process `cat $PIDFILE`."
      exit 1
    fi
    echo "Starting os-<%= @name %>..."
    cd <%= @config[:app_home] %> && bundle exec ./<%= @name %>.sh &
    while [ ! -f $PIDFILE ]; do
      sleep 1
    done
    echo "os-<%= @name %> start/running, process `cat $PIDFILE`."
}

# Stop the service
stop() {
    if [ ! -f $PIDFILE ]; then
      echo "os-<%= @name %>: not running. Unable to stop."
      exit 1
    fi
    PID=`cat $PIDFILE`
    echo "Stopping os-<%= @name %>, process $PID.."
    sudo kill $PID
    while ps -p $PID > /dev/null
    do
      sleep 1
    done
    echo "Stopped os-<%= @name %>"
}

# To prevent cold start problem
reload() {
    if [ -f $PIDFILE ]; then
      OLDPID=`cat $PIDFILE`
      echo "Reloading os-<%= @name %>, process $OLDPID..."
      sudo kill -s USR2 $OLDPID
      while ps -p $OLDPID > /dev/null
      do
        sleep 1
      done
      echo "os-<%= @name %> start/running, process `cat $PIDFILE`."
    else
      echo "os-<%= @name %> not running. Starting instead."
      start
    fi
}

# Display the status of the service
status() {
    if [ ! -f $PIDFILE ]; then
        echo "os-<%= @name %>: not running."
    else
        echo "os-<%= @name %>: running, process `cat $PIDFILE`."
    fi
}

### main logic ###
case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  status)
        status
        ;;
  restart)
        stop
        start
        ;;
  reload)
        reload
        ;;
  *)
        echo $"Usage: $0 {start|stop|restart|reload|status}"
        exit 1
esac
exit 0