--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/password/drivers/pw_usermod.php	Thu Jan 04 15:50:29 2018 -0500
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * pw_usermod Driver
+ *
+ * Driver that adds functionality to change the systems user password via
+ * the 'pw usermod' command.
+ *
+ * For installation instructions please read the README file.
+ *
+ * @version 2.0
+ * @author Alex Cartwright <acartwright@mutinydesign.co.uk>
+ * @author Adamson Huang <adomputer@gmail.com>
+ *
+ * Copyright (C) 2005-2013, The Roundcube Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ */
+
+class rcube_pw_usermod_password
+{
+    public function save($currpass, $newpass)
+    {
+        $username = $_SESSION['username'];
+        $cmd = rcmail::get_instance()->config->get('password_pw_usermod_cmd');
+        $cmd .= " $username > /dev/null";
+
+        $handle = popen($cmd, "w");
+        fwrite($handle, "$newpass\n");
+
+        if (pclose($handle) == 0) {
+            return PASSWORD_SUCCESS;
+        }
+        else {
+            rcube::raise_error(array(
+                'code' => 600,
+                'type' => 'php',
+                'file' => __FILE__, 'line' => __LINE__,
+                'message' => "Password plugin: Unable to execute $cmd"
+                ), true, false);
+        }
+
+        return PASSWORD_ERROR;
+    }
+}