run as daemon

Gemfile

@@ -5,3 +5,4 @@ gem "mysql2"
 gem "serialport"
 gem "state_pattern"
 gem 'rufus-scheduler'
+gem 'daemons'

Gemfile.lock

@@ -14,6 +14,7 @@ GEM
       multi_json (~> 1.0)
     arel (3.0.2)
     builder (3.0.4)
+    daemons (1.1.9)
     i18n (0.6.1)
     multi_json (1.7.7)
     mysql2 (0.3.11)
@@ -28,6 +29,7 @@ PLATFORMS
 
 DEPENDENCIES
   activerecord (= 3.2.13)
+  daemons
   mysql2
   rufus-scheduler
   serialport

daemonize.rb

@@ -0,0 +1,8 @@
+require 'rubygems'
+require 'daemons'
+ 
+pwd = Dir.pwd
+Daemons.run_proc('smartmeter', {:dir_mode => :normal, :dir => pwd+"/pids"}) do
+  Dir.chdir(pwd)
+  exec "ruby smartmeter.rb"
+end

etc/smartmeter

@@ -0,0 +1,11 @@
+#!/bin/bash
+#
+# Startup script (put in /etc/init.d/smartmeter)
+#
+# description: Starts Smartmeter as an unprivileged user.
+#
+
+sudo -u www-data ruby /mnt/usb/ruby/smartmeter/daemonize.rb $1
+RETVAL=$?
+
+exit $RETVAL