setup/classes/class.ilSetup.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2006 ILIAS open source, University of Cologne            |
        |                                                                             |
        | 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 2              |
        | 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, write to the Free Software                 |
        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/

class ilSetup extends PEAR
{
        var $ini;                       // ini file object
        var $ini_file_path;     // full path to setup.ini, containing the client list
        var $error = "";        // error text

        var $ini_ilias_exists = false;  // control flag ilias.ini
        var $ini_client_exists = false; // control flag client.ini
        
        var $setup_defaults;                    // ilias.master.ini
        var $ilias_nic_server = "http://homer.ilias.uni-koeln.de/ilias-nic/index.php";  // URL to ilias nic server

        var $preliminaries_result = array();    // preliminaries check results
        var $preliminaries = true;                              //

        var $SQL_FILE = "../sql/ilias3.sql";

        var $dsn = "";

        var $db;

        var $setup_password;            // master setup password
        var $default_client;            // client id of default client
        
        var $safe_mode;                         // safe mode enabled (true) or disabled (false)
        var $safe_mode_exec_dir;        // contains exec_dir_path 
        
        var $auth;                                      // current user is authenticated? (true)
        var $access_mode;                       // if "admin", admin functions are enabled

        function ilSetup($a_auth,$a_auth_type)
        {
                global $log;

                $this->PEAR();
                
                define("ILIAS_MODULE","setup");
                
                $this->auth = ($a_auth) ? true : false;
                $this->access_mode = $a_auth_type;

                // safe mode status & exec_dir
                if ($this->safe_mode = ini_get("safe_mode"))
                {
                        $this->safe_mode_exec_dir = ilFile::deleteTrailingSlash(ini_get("safe_mode_exec_dir"));
                }
                
                // Error Handling
                $this->error_obj = new ilErrorHandling();
                $this->setErrorHandling(PEAR_ERROR_CALLBACK,array($this->error_obj,'errorHandler'));

                // set path to ilias.ini
                $this->ini_file_path = ILIAS_ABSOLUTE_PATH."/ilias.ini.php";
                $this->setup_defaults = ILIAS_ABSOLUTE_PATH."/setup/ilias.master.ini.php";

                // init setup.ini
                $this->ini_ilias_exists = $this->init();

                if ($this->ini_ilias_exists)
                {
                        if ($this->ini->readVariable("log","path") != "")
                        {
                                $log->path = $this->ini->readVariable("log","path");
                        }

                        if ($this->ini->readVariable("log","file") != "")
                        {
                                $log->filename = $this->ini->readVariable("log","file");
                        }

                        if ($this->ini->readVariable("log","enabled") != "")
                        {
                                $log->enabled = $this->ini->readVariable("log","enabled");
                        }
                }
        }

        function init()
        {
                // load data from setup.ini file
                $this->ini = new ilIniFile($this->ini_file_path);
                
                if (!$this->ini->read())
                {
                        $this->ini->GROUPS = parse_ini_file($this->setup_defaults,true);
                        $this->error = get_class($this).": ".$this->ini->getError();
                        return false;
                }
                
                $this->setup_password = $this->ini->readVariable("setup","pass");
                $this->default_client = $this->ini->readVariable("clients","default");

                define("ILIAS_DATA_DIR",$this->ini->readVariable("clients","datadir"));
                define("ILIAS_WEB_DIR",$this->ini->readVariable("clients","path"));

                return true;
        }
        
        function saveNewClient()
        {
                // save client id to session
                $_SESSION["ClientId"] = $this->client->getId();
                
                // create client
                if (!$this->client->create())
                {
                        $this->error = $this->client->getError();
                        return false;
                }

                //everything okay
                $this->ini_client_exists = true;

                return true;            
        }
        
        function updateNewClient($a_old_client_id)
        {
                return true;
                //var_dump("<pre>",$this->client,"</pre>");exit;

                if ($a_old_client_id != $this->client->getId())
                {
                        // check for existing client dir
                        if (file_exists(ILIAS_ABSOLUTE_PATH."/".ILIAS_WEB_DIR."/".$this->client->getId()))
                        {
                                $this->raiseError($this->lng->txt("client_id_already_exists"),$this->error_obj->MESSAGE);
                        }
                        
                        if (!$this->saveNewClient())
                        {
                                $this->raiseError($this->lng->txt("save_error"),$this->error_obj->MESSAGE);
                        }
                        
                        ilUtil::delDir(ILIAS_ABSOLUTE_PATH."/".ILIAS_WEB_DIR."/".$a_old_client_id);
                        ilUtil::delDir(ILIAS_DATA_DIR."/".$a_old_client_id);    
                }
                
                //everything okay
                $this->ini_client_exists = true;

                return true;            
        }

        function execQuery($db,$str)
        {
                $sql = explode("\n",trim($str));
                for ($i=0; $i<count($sql); $i++)
                {
                        $sql[$i] = trim($sql[$i]);
                        if ($sql[$i] != "" && substr($sql[$i],0,1)!="#")
                        {
                                //take line per line, until last char is ";"
                                if (substr($sql[$i],-1)==";")
                                {
                                        //query is complete
                                        $q .= " ".substr($sql[$i],0,-1);
                                        $r = $db->query($q);
                                        if ($r == false)
                                                return false;
                                        unset($q);
                                } //if
                                else
                                {
                                        $q .= " ".$sql[$i];
                                } //else
                        } //if
                } //for
                return true;
        }

        function createDatabase($a_collation = "")
        {
                if ($this->client->checkDatabaseExists())
                {
                        $this->error = $this->lng->txt("database_exists");
                        return false;
                }
                
                //create database
                $db = DB::connect($this->client->dsn_host);
                if (DB::isError($db))
                {
                        $this->error = "connection_failed";
                        return false;
                }

                if ($a_collation != "")
                {
                        $sql = "CREATE DATABASE ".$this->client->getdbName().
                                " CHARACTER SET utf8".
                                " COLLATE ".$a_collation;
                }
                else
                {
                        $sql = "CREATE DATABASE ".$this->client->getdbName();
                }
                $r = $db->query($sql);

                if (DB::isError($r))
                {
                        $this->error = "create_database_failed";
                        return false;
                }

                //database is created, now disconnect and reconnect
                $db->disconnect();
                
                $this->client->db_exists = true;
                return true;
        }
        
        function installDatabase()
        {
                if (!$this->client->checkDatabaseHost())
                {
                        $this->error = "no_connection_to_host";
                        return false;
                }

                if (!$this->client->connect())
                {
                        return false;
                }

                //take sql dump an put it in
                if ($this->readDump($this->client->db, $this->SQL_FILE))
                {
                        $this->client->db_installed = true;
                        return true;
                }
                else
                {
                        return false;
                }
        }

        function getline( $fp, $delim )
        {
                $result = "";
                while( !feof( $fp ) )
                {
                        $tmp = fgetc( $fp );
                        if( $tmp == $delim )
                                return $result;
                        $result .= $tmp;
                }
                return $result;
        }

        function readDump($db, $file)
        {
                $fp = fopen($file, 'r');

                while(!feof($fp))
                {
                        //$line = trim(fgets($fp, 200000));
                        $line = trim($this->getline($fp, "\n"));

                        if ($line != "" && substr($line,0,1)!="#"
                                && substr($line,0,1)!="-")
                        {
                                //take line per line, until last char is ";"
                                if (substr($line,-1)==";")
                                {
                                        //query is complete
                                        $q .= " ".substr($line,0,-1);
                                        $r = $db->query($q);
                                        if (mysql_errno() > 0)
                                        {
                                                echo "<br />ERROR: ".mysql_error().
                                                        "<br />SQL: $q";
                                                return false;
                                        }
                                        unset($q);
                                        unset($line);
                                } //if
                                else
                                {
                                        $q .= " ".$line;
                                } //else
                        } //if
                } //for
                
                fclose($fp);
                return true;
        }

        
        function checkIniFileExists()
        {
                $a = @file_exists($this->INI_FILE);
                return $a;
        }

        function checkWritable($a_dir = "..")
        {
                clearstatcache();
                if (is_writable($a_dir))
                {
                        $arr["status"] = true;
                        $arr["comment"] = "";
                }
                else
                {
                        $arr["status"] = false;
                        $arr["comment"] = $this->lng->txt("pre_folder_write_error");
                }

                return $arr;
        }

        function checkCreatable($a_dir = "..")
        {
                clearstatcache();
                if (mkdir($a_dir."/crst879dldsk9d", 0774))
                {
                        $arr["status"] = true;
                        $arr["comment"] = "";

                        rmdir($a_dir."/crst879dldsk9d");
                }
                else
                {
                        $arr["status"] = false;
                        $arr["comment"] = $this->lng->txt("pre_folder_create_error");
                }

                return $arr;
        }

        function checkCookiesEnabled()
        {
                global $sess;

                if ($sess->usesCookies)
                {
                        $arr["status"] = true;
                        $arr["comment"] = "";
                }
                else
                {
                        $arr["status"] = false;
                        $arr["comment"] = $this->lng->txt("pre_cookies_disabled");
                }

                return $arr;
        }

        function checkPHPVersion()
        {
                $version =  phpversion();
                $arr["version"] = $version;
                $first = (integer) substr($version,0,1);

                switch ($first)
                {
                        case 2:
                        case 3:
                                $arr["status"] = false;
                                $arr["comment"] = $this->lng->txt("pre_php_version_3");
                                break;

                        case 4:
                                $second = (integer) substr($version,2,1);
                                if ($second >= 3)
                                {
                                        $arr["status"] = true;
                                        $arr["comment"] = "";
                                }
                                elseif ($second == 2)
                                {
                                        $arr["status"] = false;
                                        $arr["comment"] = $this->lng->txt("pre_php_version_4.2");
                                }
                                else
                                {
                                        $arr["status"] = false;
                                        $arr["comment"] = $this->lng->txt("pre_php_version_4.1");
                                }
                                break;

                        case 5:
                                $arr["status"] = true;
                                $arr["comment"] = $this->lng->txt("pre_php_version_5");
                                break;

                        default:
                                $arr["status"] = true;
                                $arr["comment"] = $this->lng->txt("pre_php_version_unknown");
                                break;
                }

                return $arr;
        }

        function checkAuth()
        {
                if ($_SESSION["auth"] === true)
                {
                        return true;
                }

                return false;
        }
        
        function queryPreliminaries()
        {
                $a = array();
                $a["php"] = $this->checkPHPVersion();
                $a["root"] = $this->checkWritable();
                $a["create"] = $this->checkCreatable();
                $a["cookies"] = $this->checkCookiesEnabled();

                return $a;
        }

        function checkPreliminaries()
        {
                $this->preliminaries_result = $this->queryPreliminaries();

                foreach ($this->preliminaries_result as $val)
                {
                        if ($val["status"] === false)
                        {
                                $this->preliminaries = false;
                                return false;
                        }
                }

                return true;
        }

        function getPassword ()
        {
                return $this->ini->readVariable("setup","pass");
        }

        function setPassword ($a_password)
        {
                $this->ini->setVariable("setup","pass",md5($a_password));

                if ($this->ini->write() == false)
                {
                        $this->error = $this->ini->getError();
                        return false;
                }
                
                return true;
        }
        
        function loginAsClient($a_auth_data)
        {
                if (empty($a_auth_data["client_id"]))
                {
                        $this->error = "no_client_id";
                        return false;
                }

                if (empty($a_auth_data["username"]))
                {
                        $this->error = "no_username";
                        return false;
                }

                if (empty($a_auth_data["password"]))
                {
                        $this->error = "no_password";
                        return false;
                }
                
                if (!$this->newClient($a_auth_data["client_id"]))
                {
                        $this->error = "unknown_client_id";
                        unset($this->client);
                        return false;
                }
                
                if (!$this->client->db_exists)
                {
                        $this->error = "no_db_connect_consult_admin";
                        unset($this->client);
                        return false;           
                }
                
                $q = "SELECT usr_data.usr_id FROM usr_data ".
                         "LEFT JOIN rbac_ua ON rbac_ua.usr_id=usr_data.usr_id ".
                         "LEFT JOIN settings ON settings.value = rbac_ua.rol_id ".
                         "WHERE settings.keyword='system_role_id' ".
                         "AND usr_data.login='".$a_auth_data["username"]."' ".
                         "AND usr_data.passwd='".md5($a_auth_data["password"])."'";
                $r = $this->client->db->query($q);
                
                if (!$r->numRows())
                {
                        $this->error = "login_invalid";
                        return false;
                }

                // all checks passed -> user valid
                $_SESSION["auth"] = true;
                $_SESSION["access_mode"] = "client";
                $_SESSION["ClientId"] = $this->client->getId();         
                return true;
        }

        function loginAsAdmin($a_password)
        {
                $a_password = md5($a_password);
                
                if ($this->ini->readVariable("setup","pass") == $a_password)
                {
                        $_SESSION["auth"] = true;
                        $_SESSION["access_mode"] = "admin";
                        return true;
                }
                
                return false;
        }

        function newClient($a_client_id = 0)
        {
                if (!$this->isInstalled())
                {
                        return false;
                }

                $this->client = new ilClient($a_client_id);

                if (!$this->client->init())
                {
                        $this->error = get_class($this).": ".$this->client->getError();
                        $_SESSION["ClientId"] = "";
                        return false;
                }
                
                $_SESSION["ClientId"] = $a_client_id;
                
                return true;
        }
        
        function getStatus ($client = 0)
        {
                if (!is_object($client))
                {
                        if ($this->ini_client_exists)
                        {
                                $client =& $this->client;
                        }
                        else
                        {
                                $client = new ilClient();
                        }
                }
                
                $status = array();
                $status["ini"] = $this->checkClientIni($client);
                $status["db"] = $this->checkClientDatabase($client);
                
                if ($status["db"]["status"] === false and $status["db"]["update"] !== true)
                {
                        $status["lang"]["status"] = false;
                        $status["lang"]["comment"] = $status["db"]["comment"];
                        $status["contact"]["status"] = false;
                        $status["contact"]["comment"] = $status["db"]["comment"];
                        $status["nic"]["status"] = false;
                        $status["nic"]["comment"] = $status["db"]["comment"];
                }
                else
                {
                        $status["lang"] = $this->checkClientLanguages($client);
                        $status["contact"] = $this->checkClientContact($client);
                        $status["nic"] = $this->checkClientNIC($client);
                        $status["finish"] = $this->checkFinish($client);
                        $status["access"] = $this->checkAccess($client);
                }

                //return value
                return $status;
        }
        
        function checkFinish(&$client)
        {
                if ($client->getSetting("setup_ok"))
                {
                        $arr["status"] = true;
                        $arr["comment"] = $this->lng->txt("setup_finished");
                }
                else
                {
                        $arr["status"] = false;
                        $arr["comment"] = $this->lng->txt("setup_not_finished");
                }
                
                return $arr;
        }
        
        function checkAccess(&$client)
        {
                if ($client->ini->readVariable("client","access") == "1")
                {
                        $arr["status"] = true;
                        $arr["comment"] = $this->lng->txt("online");
                }
                else
                {
                        $arr["status"] = false;
                        $arr["comment"] = $this->lng->txt("disabled");
                }
                
                return $arr;
        }

        function checkClientIni(&$client)
        {
                if (!$arr["status"] = $client->init())
                {
                        $arr["comment"] = $client->getError();
                }
                else
                {
                        $arr["comment"] = "dir: /".ILIAS_WEB_DIR."/".$client->getId();                  
                }
                
                return $arr; 
        }
        
        function checkClientDatabase(&$client)
        {
                if (!$arr["status"] = $client->db_exists)
                {
                        $arr["comment"] = $this->lng->txt("no_database");
                        return $arr;
                }
                
                if (!$arr["status"] = $client->db_installed)
                {
                        $arr["comment"] = $this->lng->txt("db_not_installed");
                        return $arr;
                }
                
                // TODO: move this to client class!!
                $client->setup_ok = (bool) $client->getSetting("setup_ok");
                        
                $this->lng->setDbHandler($client->db);
                include_once "../classes/class.ilDBUpdate.php";
                $dbupdate = new ilDBUpdate($client->db);
                                
                if (!$arr["status"] = $dbupdate->getDBVersionStatus())
                {
                        $arr["comment"] = $this->lng->txt("db_needs_update");
                        $arr["update"] = true;
                        return $arr;
                }

                // check control information
                $q = "SELECT count(*) as cnt FROM ctrl_calls";
                $cset = $client->db->query($q);
                $crec = $cset->fetchRow(DB_FETCHMODE_ASSOC);
                if ($crec["cnt"] == 0)
                {
                        $arr["status"] = false;
                        $arr["comment"] = $this->lng->txt("db_control_structure_missing");
                        $arr["update"] = true;
                        return $arr;
                }

                $arr["comment"] = "version ".$dbupdate->getCurrentVersion();
                return $arr;
        }

        function checkClientLanguages(&$client)
        {
                $installed_langs = $this->lng->getInstalledLanguages();
                
                $count = count($installed_langs);
                
                if ($count < 1)
                {
                        $arr["status"] = false;
                        $arr["comment"] = $this->lng->txt("lang_none_installed");               
                }
                else
                {
                        $arr["status"] = true;
                        $arr["comment"] = $count." ".$this->lng->txt("languages_installed");
                }
                
                return $arr;
        }
        
        function checkClientContact(&$client)
        {
                $arr["status"] = true;
                $arr["comment"] = $this->lng->txt("filled_out");

                $settings = $client->getAllSettings();
                $client_name = $client->getName();

                // check required fields
                if (empty($settings["admin_firstname"]) or empty($settings["admin_lastname"])
                        or empty($settings["admin_street"]) or empty($settings["admin_zipcode"])
                        or empty($settings["admin_country"]) or empty($settings["admin_city"])
                        or empty($settings["admin_phone"]) or empty($settings["admin_email"])
                        or empty($client_name) or empty($settings["inst_institution"]))
                {
                        $arr["status"] = false;
                        $arr["comment"] = $this->lng->txt("missing_data");
                }
                        
                // admin email
                if (!ilUtil::is_email($settings["admin_email"]) and $arr["status"] != false)
                {
                        $arr["status"] = false;
                        $arr["comment"] = $this->lng->txt("email_not_valid");
                }
                
                return $arr;
        }
        
        function checkClientNIC(&$client)
        {
                $settings = $client->getAllSettings();
                
                if (!isset($settings["nic_enabled"]))
                {
                        $arr["status"] = false;
                        $arr["comment"] = $this->lng->txt("nic_not_disabled");
                        return $arr;
                }
                
                $arr["status"] = true;

                if ($settings["nic_enabled"] == "-1")
                {
                        $arr["comment"] = $this->lng->txt("nic_reg_failed");
                        return $arr;
                }

                if (!$settings["nic_enabled"])
                {
                        $arr["comment"] = $this->lng->txt("nic_reg_disabled");
                }
                else
                {
                        $arr["comment"] = $this->lng->txt("nic_reg_enabled");
                        if ($settings["inst_id"] <= 0)
                        {
                                $arr["status"] = false;
                        }
                }

                return $arr;
        }
        
        function isInstalled()
        {
                return $this->ini_ilias_exists;
        }
        
        function isAuthenticated()
        {
                return $this->auth;
        }

        function isAdmin()
        {
                return ($this->access_mode == "admin") ? true : false;
        }
        
        function saveMasterSetup($a_formdata)
        {
                $datadir_path = preg_replace("/\\\\/","/",ilFile::deleteTrailingSlash(ilUtil::stripSlashes($a_formdata["datadir_path"])));

                if ($a_formdata["chk_datadir_path"] == 1)       // mode create dir 
                {
                        if (!ilUtil::makeDir($datadir_path))
                        {
                                $this->error = "create_datadir_failed";
                                return false;
                        }
                }

                // create webspace dir if it does not exist
                if (!@file_exists(ILIAS_ABSOLUTE_PATH."/".$this->ini->readVariable("clients","path")) and !@is_dir(ILIAS_ABSOLUTE_PATH."/".$this->ini->readVariable("clients","path")))
                {
                        if (!ilUtil::makeDir(ILIAS_ABSOLUTE_PATH."/".$this->ini->readVariable("clients","path")))
                        {
                                $this->error = "create_webdir_failed";
                                return false;
                        }                       
                }
                
                $form_log_path = preg_replace("/\\\\/","/",ilFile::deleteTrailingSlash(ilUtil::stripSlashes($a_formdata["log_path"])));
                $log_path = substr($form_log_path,0,strrpos($form_log_path,"/"));
                $log_file = substr($form_log_path,strlen($log_path)+1);
                
                $this->ini->setVariable("server","http_path",ILIAS_HTTP_PATH);
                $this->ini->setVariable("server","absolute_path",ILIAS_ABSOLUTE_PATH);
                $this->ini->setVariable("clients", "datadir", $datadir_path);
                $this->ini->setVariable("tools", "convert", preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["convert_path"])));
                $this->ini->setVariable("tools", "zip", preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["zip_path"])));
                $this->ini->setVariable("tools", "unzip", preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["unzip_path"])));
                $this->ini->setVariable("tools", "java", preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["java_path"])));
                $this->ini->setVariable("tools", "htmldoc", preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["htmldoc_path"])));
                $this->ini->setVariable("tools", "latex", ilUtil::stripSlashes($a_formdata["latex_url"]));
                $this->ini->setVariable("tools", "vscantype", preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["vscanner_type"])));
                $this->ini->setVariable("tools", "scancommand", preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["scan_command"])));
                $this->ini->setVariable("tools", "cleancommand", preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["clean_command"])));
                $this->ini->setVariable("setup", "pass", md5($a_formdata["setup_pass"]));
                $this->ini->setVariable("log", "path", $log_path);
                $this->ini->setVariable("log", "file", $log_file);
                $this->ini->setVariable("log", "enabled", (isset($a_formdata["chk_log_status"])) ? "0" : 1);

                if (!$this->ini->write())
                {
                        $this->error = get_class($this).": ".$this->ini->getError();
                        return false;
                }

                // everything is fine. so we authenticate the user and set access mode to 'admin'
                $_SESSION["auth"] = true;
                $_SESSION["access_mode"] = "admin";     

                return true;
        }
        
        function updateMasterSettings($a_formdata)
        {
                $convert_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["convert_path"]));
                $zip_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["zip_path"]));
                $unzip_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["unzip_path"]));
                $java_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["java_path"]));
                $htmldoc_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["htmldoc_path"]));
                $latex_url = ilUtil::stripSlashes($a_formdata["latex_url"]);
                $fop_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["fop_path"]));
                $scan_type = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["vscanner_type"]));
                $scan_command = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["scan_command"]));
                $clean_command = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["clean_command"]));

                $this->ini->setVariable("tools", "convert", $convert_path);
                $this->ini->setVariable("tools", "zip", $zip_path);
                $this->ini->setVariable("tools", "unzip", $unzip_path);
                $this->ini->setVariable("tools", "java", $java_path);
                $this->ini->setVariable("tools", "htmldoc", $htmldoc_path);
                $this->ini->setVariable("tools", "latex", $latex_url);
                $this->ini->setVariable("tools", "fop", $fop_path);
                $this->ini->setVariable("tools", "vscantype", $scan_type);
                $this->ini->setVariable("tools", "scancommand", $scan_command);
                $this->ini->setVariable("tools", "cleancommand", $clean_command);

                $form_log_path = preg_replace("/\\\\/","/",ilFile::deleteTrailingSlash(ilUtil::stripSlashes($a_formdata["log_path"])));
                $log_path = substr($form_log_path,0,strrpos($form_log_path,"/"));
                $log_file = substr($form_log_path,strlen($log_path)+1);

                $this->ini->setVariable("log", "path", $log_path);
                $this->ini->setVariable("log", "file", $log_file);
                $this->ini->setVariable("log", "enabled", (isset($a_formdata["chk_log_status"])) ? "0" : 1);

                if (!$this->ini->write())
                {
                        $this->error = get_class($this).": ".$this->ini->getError();
                        return false;
                }

                return true;
        }

        function checkToolsSetup($a_formdata)
        {
                // convert path
                if (!isset($a_formdata["chk_convert_path"]))
                {
                        // convert backslashes to forwardslashes
                        $convert_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["convert_path"]));

                        if (empty($convert_path))
                        {
                                $this->error = "no_path_convert";
                                return false;
                        }
                        
                        if (!$this->testConvert($convert_path))
                        {
                                $this->error = "check_failed_convert";
                                return false;
                        }
                }
                
                // zip path
                if (!isset($a_formdata["chk_zip_path"]))
                {
                        // convert backslashes to forwardslashes
                        $zip_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["zip_path"]));
                        
                        if (empty($zip_path))
                        {
                                $this->error = "no_path_zip";
                                return false;
                        }
                
                        if (!$this->testZip($zip_path))
                        {
                                $this->error = "check_failed_zip";
                                return false;
                        }
                }

                // unzip path
                if (!isset($a_formdata["chk_unzip_path"]))
                {
                        // convert backslashes to forwardslashes
                        $unzip_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["unzip_path"]));

                        if (empty($unzip_path))
                        {
                                $this->error = "no_path_unzip";
                                return false;
                        }

                        if (!$this->testUnzip($unzip_path))
                        {
                                $this->error = "check_failed_unzip";
                                return false;
                        }
                }
                
                // java path
                if (!isset($a_formdata["chk_java_path"]))
                {
                        // convert backslashes to forwardslashes
                        $java_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["java_path"]));

                        if (empty($java_path))
                        {
                                $this->error = "no_path_java";
                                return false;
                        }
                
                        if (!$this->testJava($java_path))
                        {
                                $this->error = "check_failed_java";
                                return false;
                        }
                }
                
                // htmldoc path
                if (!isset($a_formdata["chk_htmldoc_path"]))
                {
                        // convert backslashes to forwardslashes
                        $htmldoc_path = preg_replace("/\\\\/","/",ilUtil::stripSlashes($a_formdata["htmldoc_path"]));

                        if (empty($htmldoc_path))
                        {
                                $this->error = "no_path_htmldoc";
                                return false;
                        }
                
                        if (!$this->testHtmldoc($htmldoc_path))
                        {
                                $this->error = "check_failed_htmldoc";
                                return false;
                        }
                }

                // latex  url
                if (!isset($a_formdata["chk_latex_url"]))
                {
                        $latex_url = ilUtil::stripSlashes($a_formdata["latex_url"]);
                        if (empty($latex_url))
                        {
                                $this->error = "no_latex_url";
                                return false;
                        }
                
                        if (!$this->testLatex($latex_url))
                        {
                                $this->error = "check_failed_latex";
                                return false;
                        }
                }
                
                return true;
        }
                
        function checkDataDirSetup($a_formdata)
        {
                // remove trailing slash & convert backslashes to forwardslashes
                $datadir_path = preg_replace("/\\\\/","/",ilFile::deleteTrailingSlash(ilUtil::stripSlashes($a_formdata["datadir_path"])));

                if (empty($datadir_path))
                {
                        $this->error = "no_path_datadir";
                        return false;
                }

                $webspace_dir = ILIAS_ABSOLUTE_PATH . "/data";
                
                // datadir may not point to webspace dir or to any place under webspace_dir
                if (strpos($datadir_path,$webspace_dir) !== false)
                {
                        $this->error = "datadir_webspacedir_match";
                        return false;
                }

                // create dir
                if ($a_formdata["chk_datadir_path"] == 1)
                {
                        $dir_to_create = substr(strrchr($datadir_path, "/"), 1);
                        $dir_to_check = substr($datadir_path,0,- strlen($dir_to_create)-1);

                        if (is_writable($datadir_path))
                        {
                                $this->error = "dir_exists_create";
                                return false;
                        }

                        if (!is_writable($dir_to_check))
                        {
                                $this->error = "cannot_create_datadir_no_write_access";
                                return false;
                        }
                }
                else    // check set target dir
                {
                        if (!is_writable($datadir_path))
                        {
                                $this->error = "cannot_create_datadir_no_write_access";
                                return false;
                        }
                }

                return true;
        }

        function checkPasswordSetup($a_formdata)
        {
                if (!$a_formdata["setup_pass"])
                {
                        $this->error = "no_setup_pass_given";
                        return false;
                }

                if ($a_formdata["setup_pass"] != $a_formdata["setup_pass2"])
                {
                        $this->error = "pass_does_not_match";
                        return false;
                }
                
                return true;
        }
        
        function checkLogSetup($a_formdata)
        {
                // log path
                if (!isset($a_formdata["chk_log_status"]))
                {
                        // remove trailing slash & convert backslashes to forwardslashes
                        $log_path = preg_replace("/\\\\/","/",ilFile::deleteTrailingSlash(ilUtil::stripSlashes($a_formdata["log_path"])));

                        if (empty($log_path))
                        {
                                $this->error = "no_path_log";
                                return false;
                        }

                        if (!@touch($log_path))
                        {
                                $this->error = "could_not_create_logfile";
                                return false;
                        }
                }
                
                return true;
        }
        
        function getError()
        {
                if (empty($this->error))
                {
                        return false;
                }
                
                $error = $this->error;
                $this->error = "";
                
                return $error;
        }

        function _ilSetup()
        {
                //if ($this->ini->readVariable("db","type") != "")
                //{
                //      $this->db->disconnect();
                //}
                return true;
        }

        function testConvert ($a_convert_path)
        {
                // generate gif with convert
                if (file_exists(ILIAS_ABSOLUTE_PATH."/images/test.gif"))
                {
                        unlink(ILIAS_ABSOLUTE_PATH."/images/test.gif");
                }

                system($a_convert_path." ".ILIAS_ABSOLUTE_PATH."/images/test.jpg GIF:".ILIAS_ABSOLUTE_PATH."/images/test.gif");
        
                // check wether convert generated file
                if (file_exists(ILIAS_ABSOLUTE_PATH."/images/test.gif"))
                {
                        unlink(ILIAS_ABSOLUTE_PATH."/images/test.gif");
                        return true;
                }
                else
                {
                        return false;
                }
        }

        function testJava ($a_java_path)
        {
                exec($a_java_path, $out, $back);
        
                unset($out);
        
                return ($back != 1) ? false : true;
        }

        function testLatex($a_latex_url)
        {
                // open the URL
                include_once "class.ilHttpRequest.php";
                $http = new ilHttpRequest(ilUtil::stripSlashes($a_latex_url) . "?x_0");
                $result = $http->downloadToString();
                if ((strpos((substr($result, 0, 5)), "PNG") !== FALSE) || (strpos((substr($result, 0, 5)), "GIF") !== FALSE))
                {
                        return true;
                }
                else
                {
                        return false;
                }
        }
        
        function testZip ($a_zip_path)
        {
                // create test file and run zip
                $fp = fopen(ILIAS_ABSOLUTE_PATH."/test.dat", "w");
                        
                fwrite($fp, "test");
                fclose($fp);
                                        
                if (file_exists(ILIAS_ABSOLUTE_PATH."/test.dat"))
                {
                        $curDir = getcwd();
                        chdir(ILIAS_ABSOLUTE_PATH);
                                
                        $zipCmd = $a_zip_path." -m zip_test_file.zip test.dat";
                                
                        exec($zipCmd);
                                
                        chdir($curDir);

                }
        
                // check wether zip generated test file or not
                if (file_exists(ILIAS_ABSOLUTE_PATH."/zip_test_file.zip"))
                {
                        unlink(ILIAS_ABSOLUTE_PATH."/zip_test_file.zip");
                        return true;
                }
                else
                {
                        unlink(ILIAS_ABSOLUTE_PATH."/test.dat");
                        return false;
                }
        }
        
        
        function testUnzip ($a_unzip_path)
        {
                $curDir = getcwd();
                                
                chdir(ILIAS_ABSOLUTE_PATH);
                                
                if (file_exists(ILIAS_ABSOLUTE_PATH."/unzip_test_file.zip"))
                {
                        $unzipCmd = $a_unzip_path." unzip_test_file.zip";
                        exec($unzipCmd);
                }

                chdir($curDir);
        
                // check wether unzip extracted the test file or not
                if (file_exists(ILIAS_ABSOLUTE_PATH."/unzip_test_file.txt"))
                {
                        unlink(ILIAS_ABSOLUTE_PATH."/unzip_test_file.txt");
                
                        return true;
                }
                else
                {
                        return false;
                }
        }

        function testHtmldoc($a_htmldoc_path)
        {
                $curDir = getcwd();
                                
                chdir(ILIAS_ABSOLUTE_PATH);

                $html = "<html><head><title></title></head><body><p>test</p></body></html>";

                $html_file = "htmldoc_test_file.html";
        
        $fp = fopen( $html_file ,"wb");
        fwrite($fp, $html);
        fclose($fp);

        $htmldoc = $a_htmldoc_path." ";
        $htmldoc .= "--no-toc ";
        $htmldoc .= "--no-jpeg ";
        $htmldoc .= "--webpage ";
        $htmldoc .= "--outfile htmldoc_test_file.pdf ";
        $htmldoc .= "--bodyfont Arial ";
        $htmldoc .= "--charset iso-8859-15 ";
        $htmldoc .= "--color ";
        $htmldoc .= "--size A4  ";      // --landscape
        $htmldoc .= "--format pdf ";
        $htmldoc .= "--footer ... ";
        $htmldoc .= "--header ... ";
        $htmldoc .= "--left 60 ";
        // $htmldoc .= "--right 200 ";
        $htmldoc .= $html_file;
                exec($htmldoc);

                unlink(ILIAS_ABSOLUTE_PATH."/".$html_file);

                chdir($curDir);

                if (file_exists(ILIAS_ABSOLUTE_PATH."/htmldoc_test_file.pdf"))
                {
                        unlink(ILIAS_ABSOLUTE_PATH."/htmldoc_test_file.pdf");
                        return true;
                }
                else
                {
                        return false;
                }
        }
        
        function unzipTiny()
        {
                $this->unzip(ILIAS_ABSOLUTE_PATH . "/Services/RTE/tiny_mce.zip", TRUE);
                $this->ini->setVariable("tools", "tiny_md5", md5_file(ILIAS_ABSOLUTE_PATH . "/Services/RTE/tiny_mce.zip"));
                if ($this->ini->write() == false)
                {
                        $this->error = $this->ini->getError();
                        return false;
                }
                return TRUE;
        }

        function unzip($a_file, $overwrite = false)
        {
                //global $ilias;

                $pathinfo = pathinfo($a_file);
                $dir = $pathinfo["dirname"];
                $file = $pathinfo["basename"];

                // unzip
                $cdir = getcwd();
                chdir($dir);
                $unzip = $this->ini->readVariable("tools","unzip");
                $unzipcmd = $unzip." -Z -1 ".ilUtil::escapeShellArg($file);
                exec($unzipcmd, $arr);
                $zdirs = array();

                foreach($arr as $line)
                {
                        if(is_int(strpos($line, "/")))
                        {
                                $zdir = substr($line, 0, strrpos($line, "/"));
                                $nr = substr_count($zdir, "/");
                                //echo $zdir." ".$nr."<br>";
                                while ($zdir != "")
                                {
                                        $nr = substr_count($zdir, "/");
                                        $zdirs[$zdir] = $nr;                            // collect directories
                                        //echo $dir." ".$nr."<br>";
                                        $zdir = substr($zdir, 0, strrpos($zdir, "/"));
                                }
                        }
                }

                asort($zdirs);

                foreach($zdirs as $zdir => $nr)                         // create directories
                {
                        ilUtil::createDirectory($zdir);
                }

                // real unzip
                if ($overvwrite)
                {
                        $unzipcmd = $unzip." ".ilUtil::escapeShellArg($file);
                }
                else
                {
                        $unzipcmd = $unzip." -o ".ilUtil::escapeShellArg($file);
                }
                exec($unzipcmd);

                chdir($cdir);
        }

} // END class.ilSetup
?>