fork : add startDetachedChild

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@4007 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

fork.php

@@ -55,6 +55,42 @@ class fork
     exit;
   }
 
+  /** Create a detached child. The terminal is closed. All the displayed
+    * messages from the child are silently dropped.
+    * If some parameters are provided, the called child method will receive them
+    * This function fork and return the child PID
+    * @param callable $callable The callback method to use in child
+    * @param mixed|null $params The params to provide to child method
+    * @return The child PID
+    */
+  public function startDetachedChild ($callable, $params = array ())
+  {
+    $pid = pcntl_fork ();
+    if ($pid === -1)
+      throw new \Exception ("Can't fork the child", 500);
+    elseif ($pid)
+    {
+      // The parent
+      $this->pidList[$pid] = $pid;
+      return $pid;
+    }
+    // Call the child method
+    $sid = posix_setsid();
+
+    // Will catch all the text messages from the application to not crash if
+    // there is an "echo"
+    ob_start ();
+
+    // Close the file handlers STDOUT/STDIN
+    fclose (STDIN);
+    fclose (STDOUT);
+    fclose (STDERR);
+    $args = func_get_args ();
+    unset ($args[0]);
+    call_user_func_array ($callable, $args);
+    exit;
+  }
+
   /** Wait the end of one child
     * Return the PID of the dead child
     */