Starting the Daemonizing process.... doesn't seem to detach and run in the background but commiting anyway since I'm thinking of taking another aproach but want to be able to go back

tripal_daemon/classes/TripalJobDaemon.inc

@@ -31,6 +31,9 @@ class TripalJobDaemon {
   // The filename & path of the status file
   public $status_filename;
 
+  // Whether or not the current process is a Daemon (ie: child) or not (ie: parent)
+  protected $is_daemon = FALSE;
+
   /**
    * Creates a new TripalDaemon object
    */
@@ -54,13 +57,44 @@ class TripalJobDaemon {
     if (isset($args['memory_threshold'])) {
       $this->memory_threshold = $args['memory_threshold'];
     }
+
+    // Whether or not the current process is a Daemon (ie: child) or not (ie: parent)
+    // There are VERY FEW cases where it's a good idea to pass this option in yourself
+    if (isset($args['is_daemon'])) {
+      $this->is_daemon = $args['is_daemon'];
+    }
   }
 
   /**
    * Start the Daemon
    */
   public function start() {
-    print "Starting the Tripal Daemon...\n";
+
+    // If we are not currently dealing with the daemon/child process then we need to first
+    // create it via forking
+    if (!$this->is_daemon) {
+      print "Starting the Tripal Daemon...\n";
+      $this->fork();
+    }
+
+
+    // If we are a Daemon, we need to implement the never-ending daemonizing loop
+    if ($this->is_daemon) {
+
+      //Now, we detach from the terminal window, so that we stay alive when it is closed.
+      if ( posix_setsid() == -1 ) {
+	      echo "\n Error: Unable to detach from the terminal window. \n";
+      }
+
+      for ($i=0; $i<=10; $i++) {
+        print posix_getpid() . " Mua" . str_repeat("ha",rand(1,15)) . "\n";
+      }
+    }
+    // Otherwise, we are going to be an irresponsible parent and let our child run amok
+    else {
+      print posix_getpid() . " Letting my child run amok :)\n";
+      exit;
+    }
   }
 
   /**
@@ -90,4 +124,26 @@ class TripalJobDaemon {
   public function log() {
     print "Showing the Tripal Daemon Log...\n";
   }
+
+  /**
+   * Fork off a new process to be the daemon since nobody wants to be the daemon themselves ;-)
+   */
+  protected function fork() {
+    $pid = pcntl_fork();
+    pcntl_signal(SIGCHLD, SIG_IGN);
+
+    // Problem launching the job
+    if ($pid == -1){
+      error_log('Could not launch new job, exiting');
+      return FALSE;
+    }
+    // Parent Process since children are not self-aware
+    else if ($pid) {
+      print "Daemon Process ID: $pid.\n";
+    }
+    // Child Process (we should never get here b/c of the is_daemon logic in start)
+    else {
+      $this->is_daemon = TRUE;
+    }
+  }
 }

tripal_daemon/tripal_daemon.drush.inc

@@ -90,8 +90,9 @@ function drush_tripal_daemon_tripal_jobs_daemon($action) {
       $options[] = $opt . '=' . $val;
     }
   }
-  $command = "php $script_path/tripal_daemon_script.php $action module_path=$module_path " . implode(" ",$options);
-  exec($command, $output, $return_value);
+  $command = "php $script_path/tripal_daemon_script.php $action module_path=$module_path " . implode(" ",$options) . " &";
+  exec($command); //, $output, $return_value);
+  /**
   drush_print(implode("\n",$output));
 
   switch($return_value) {
@@ -102,4 +103,5 @@ function drush_tripal_daemon_tripal_jobs_daemon($action) {
       drush_log("Unable to $action the Daemon.",'error');
       break;
   }
+  */
 }