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diff --git a/program/lib/Crypt/GPG/ProcessControl.php b/program/lib/Crypt/GPG/ProcessControl.php
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+++ b/program/lib/Crypt/GPG/ProcessControl.php
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+<?php
+
+/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
+
+/**
+ * A class for monitoring and terminating processes
+ *
+ * PHP version 5
+ *
+ * LICENSE:
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * @category  Encryption
+ * @package   Crypt_GPG
+ * @author    Michael Gauthier <mike@silverorange.com>
+ * @copyright 2013 silverorange
+ * @license   http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
+ * @version   CVS: $Id$
+ * @link      http://pear.php.net/package/Crypt_GPG
+ */
+
+// {{{ class Crypt_GPG_ProcessControl
+
+/**
+ * A class for monitoring and terminating processes by PID
+ *
+ * This is used to safely terminate the gpg-agent for GnuPG 2.x. This class
+ * is limited in its abilities and can only check if a PID is running and
+ * send a PID SIGTERM.
+ *
+ * @category  Encryption
+ * @package   Crypt_GPG
+ * @author    Michael Gauthier <mike@silverorange.com>
+ * @copyright 2013 silverorange
+ * @license   http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
+ * @link      http://pear.php.net/package/Crypt_GPG
+ */
+class Crypt_GPG_ProcessControl
+{
+    // {{{ protected properties
+
+    /**
+     * The PID (process identifier) being monitored
+     *
+     * @var integer
+     */
+    protected $pid;
+
+    // }}}
+    // {{{ __construct()
+
+    /**
+     * Creates a new process controller from the given PID (process identifier)
+     *
+     * @param integer $pid the PID (process identifier).
+     */
+    public function __construct($pid)
+    {
+        $this->pid = $pid;
+    }
+
+    // }}}
+    // {{{ public function getPid()
+
+    /**
+     * Gets the PID (process identifier) being controlled
+     *
+     * @return integer the PID being controlled.
+     */
+    public function getPid()
+    {
+        return $this->pid;
+    }
+
+    // }}}
+    // {{{ isRunning()
+
+    /**
+     * Checks if the process is running
+     *
+     * Uses <kbd>ps</kbd> on UNIX-like systems and <kbd>tasklist</kbd> on
+     * Windows.
+     *
+     * @return boolean true if the process is running, false if not.
+     */
+    public function isRunning()
+    {
+        $running = false;
+
+        if (PHP_OS === 'WINNT') {
+            $command = 'tasklist /fo csv /nh /fi '
+                . escapeshellarg('PID eq ' . $this->pid);
+
+            $result  = exec($command);
+            $parts   = explode(',', $result);
+            $running = (count($parts) > 1 && trim($parts[1], '"') == $this->pid);
+        } else {
+            $result  = exec('ps -p ' . escapeshellarg($this->pid) . ' -o pid=');
+            $running = (trim($result) == $this->pid);
+        }
+
+        return $running;
+    }
+
+    // }}}
+    // {{{ terminate()
+
+    /**
+     * Ends the process gracefully
+     *
+     * The signal SIGTERM is sent to the process. The gpg-agent process will
+     * end gracefully upon receiving the SIGTERM signal. Upon 3 consecutive
+     * SIGTERM signals the gpg-agent will forcefully shut down.
+     *
+     * If the <kbd>posix</kbd> extension is available, <kbd>posix_kill()</kbd>
+     * is used. Otherwise <kbd>kill</kbd> is used on UNIX-like systems and
+     * <kbd>taskkill</kbd> is used in Windows.
+     *
+     * @return void
+     */
+    public function terminate()
+    {
+        if (function_exists('posix_kill')) {
+            posix_kill($this->pid, 15);
+        } elseif (PHP_OS === 'WINNT') {
+            exec('taskkill /PID ' . escapeshellarg($this->pid));
+        } else {
+            exec('kill -15 ' . escapeshellarg($this->pid));
+        }
+    }
+
+    // }}}
+}
+
+// }}}
+
+?>