Add an option to log a message every day to be sure it is alive

lib/smsd/cli.rb

@@ -1,10 +1,11 @@
 require 'biju'
 require 'logger'
+require 'date'
 
 module SMSd
   class CLI
-    attr_accessor :machine
+    attr_accessor :machine, :last_pong
-    attr_reader :modem, :options, :logger
+    attr_reader :modem, :options, :logger, :running_since
 
     def initialize(args = [], &block)
       @options = Options.parse(args)
@@ -19,10 +20,14 @@ module SMSd
     end
 
     def run
+      @running_since = DateTime.now
+
       catch_signals
       Process.daemon if options[:daemonize]
 
       loop do
+        pong if options[:alive]
+
         sleep 5
         break if @terminate
 
@@ -111,5 +116,14 @@ module SMSd
 
       logger.info "#{sms}: #{log}"
     end
+
+    def pong
+      if last_pong.nil? || last_pong < (DateTime.now - 1)
+        now = DateTime.now
+
+        logger.info "I have been alive for #{(now - running_since).to_f.round} days (#{running_since})."
+        self.last_pong = now
+      end
+    end
   end
 end

lib/smsd/cli/options.rb

@@ -12,6 +12,11 @@ module SMSd
           opts.separator ''
           opts.separator 'Specific options:'
 
+          opts.on('-a', '--[no-]alive',
+                  'Send a message to the logger every day') do |alive|
+            options[:alive] = alive
+          end
+
           opts.on('-d', '--[no-]daemonize',
                   'Run in the background') do |daemon|
             options[:daemonize] = daemon