<?php

/**
 * kpasswd Driver
 *
 * Driver that adds functionality to change the systems user password via
 * the 'kpasswd' command.
 *
 * For installation instructions please read the README file.
 *
 * @version 1.0
 *
 * @author Peter Allgeyer <peter.allgeyer@salzburgresearch.at>
 *
 * Based on chpasswd roundcubemail password driver by
 * @author Alex Cartwright <acartwright@mutinydesign.co.uk>
 */

class rcube_kpasswd_password
{
    public function save($currpass, $newpass, $username)
    {
        $bin = rcmail::get_instance()->config->get('password_kpasswd_cmd', '/usr/bin/kpasswd');
        $cmd = $bin . ' ' . escapeshellarg($username) . ' 2>&1';

        $handle = popen($cmd, 'w');
        fwrite($handle, $currpass . "\n");
        fwrite($handle, $newpass . "\n");
        fwrite($handle, $newpass . "\n");

        if (pclose($handle) == 0) {
            return PASSWORD_SUCCESS;
        }

        rcube::raise_error("Password plugin: Unable to execute {$cmd}", true);

        return PASSWORD_ERROR;
    }
}