From 9edea9976bd605071e0694a90d704266c0b7e0f9 Mon Sep 17 00:00:00 2001
From: Till Brehm <tbrehm@ispconfig.org>
Date: Thu, 14 Aug 2014 11:30:03 -0400
Subject: [PATCH] - Added warning in the interface when a path for a shelluser is set that is outside of the website docroot. - Added security settings feature to allow the root user of a server to control most aspects of whet the admin user of the controlpanel is allowed to do in system settings. This is especially useful for managed severs where the ispconfig admin user and the root user of the server are different persons.

---
 interface/lib/classes/db_mysql.inc.php |  991 +++++++++++++++++++++++++++++++++------------------------
 1 files changed, 568 insertions(+), 423 deletions(-)

diff --git a/interface/lib/classes/db_mysql.inc.php b/interface/lib/classes/db_mysql.inc.php
index 4572dac..56d43f8 100644
--- a/interface/lib/classes/db_mysql.inc.php
+++ b/interface/lib/classes/db_mysql.inc.php
@@ -1,225 +1,227 @@
 <?php
 /*
-Copyright (c) 2007, Till Brehm, projektfarm Gmbh
-All rights reserved.
+   Copyright (c) 2005, Till Brehm, projektfarm Gmbh
+   All rights reserved.
 
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
+   Redistribution and use in source and binary forms, with or without modification,
+   are permitted provided that the following conditions are met:
 
-    * Redistributions of source code must retain the above copyright notice,
-      this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above copyright notice,
-      this list of conditions and the following disclaimer in the documentation
-      and/or other materials provided with the distribution.
-    * Neither the name of ISPConfig nor the names of its contributors
-      may be used to endorse or promote products derived from this software without
-      specific prior written permission.
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+ * Neither the name of ISPConfig nor the names of its contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission.
 
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
-OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
-EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
 
-class db {
-	private $dbHost = '';		   // hostname of the MySQL server
-	private $dbName = '';		   // logical database name on that server
-	private $dbUser = '';		   // database authorized user
-	private $dbPass = '';		   // user's password
-	private $dbCharset = '';	   // what charset comes and goes to mysql: utf8 / latin1
-	private $linkId = 0;		   // last result of mysql_connect()
-	private $queryId = 0;		   // last result of mysql_query()
-	private $record	= array();	   // last record fetched
-	private $autoCommit = 1;	    // Autocommit Transactions
-	private $currentRow;		   // current row number
-	private $errorNumber = 0;	   // last error number
-	public $errorMessage = '';	   // last error message
-	private $errorLocation = '';   // last error location
-	public $show_error_messages = false;
+class db extends mysqli
+{
+	private $dbHost = '';  // hostname of the MySQL server
+	private $dbName = '';  // logical database name on that server
+	private $dbUser = '';  // database authorized user
+	private $dbPass = '';  // user's password
+	private $dbCharset = 'utf8';// Database charset
+	private $dbNewLink = false; // Return a new linkID when connect is called again
+	private $dbClientFlags = 0; // MySQL Client falgs
+	private $linkId = 0;  // last result of mysqli_connect()
+	private $queryId = 0;  // last result of mysqli_query()
+	private $record = array(); // last record fetched
+	private $autoCommit = 1;    // Autocommit Transactions
+	private $currentRow;  // current row number
+	private $errorNumber = 0; // last error number
+	public $errorMessage = ''; // last error message
+	private $errorLocation = '';// last error location
+	public $show_error_messages = false; // false in server, true in interface
+	private $isConnected = false; // needed to know if we have a valid mysqli object from the constructor
 
-	public function __construct()
-    {
+	// constructor
+	public function __construct($prefix = '') {
 		global $conf;
-		$this->dbHost = $conf['db_host'];
-		$this->dbName = $conf['db_database'];
-		$this->dbUser = $conf['db_user'];
-		$this->dbPass = $conf['db_password'];
-		$this->dbCharset = $conf['db_charset'];
-		//$this->connect();
+		if($prefix != '') $prefix .= '_';
+		$this->dbHost = $conf[$prefix.'db_host'];
+		$this->dbName = $conf[$prefix.'db_database'];
+		$this->dbUser = $conf[$prefix.'db_user'];
+		$this->dbPass = $conf[$prefix.'db_password'];
+		$this->dbCharset = $conf[$prefix.'db_charset'];
+		$this->dbNewLink = $conf[$prefix.'db_new_link'];
+		$this->dbClientFlags = $conf[$prefix.'db_client_flags'];
+		parent::__construct($conf[$prefix.'db_host'], $conf[$prefix.'db_user'], $conf[$prefix.'db_password'], $conf[$prefix.'db_database']);
+		$try = 0;
+		//while(!is_null($this->connect_error) && $try < 5) {
+		while(mysqli_connect_error() && $try < 5) {
+			if($try > 0) sleep(1);
+
+			$try++;
+			$this->updateError('DB::__construct');
+
+			parent::__construct($conf[$prefix.'db_host'], $conf[$prefix.'db_user'], $conf[$prefix.'db_password'], $conf[$prefix.'db_database']);
+		}
+
+		//if(is_null($this->connect_error)) $this->isConnected = true;
+		//else return false;
+		if(!mysqli_connect_error()) $this->isConnected = true;
+		else return false;
+
+		$this->setCharacterEncoding();
 	}
 
 	public function __destruct() {
-		$this->closeConn();
+		$this->close(); // helps avoid memory leaks, and persitent connections that don't go away.
 	}
 
-	/**  Error handler */
-	public function updateError($location)
-    {
-		$this->errorNumber = mysql_errno();
-		$this->errorMessage = mysql_error();
+	// error handler
+	public function updateError($location) {
+		global $app, $conf;
+
+		/*
+    if(!is_null($this->connect_error)) {
+      $this->errorNumber = $this->connect_errno;
+      $this->errorMessage = $this->connect_error;
+    } else {
+      $this->errorNumber = $this->errno;
+      $this->errorMessage = $this->error;
+    }
+	*/
+		if(mysqli_connect_error()) {
+			$this->errorNumber = mysqli_connect_errno();
+			$this->errorMessage = mysqli_connect_error();
+		} else {
+			$this->errorNumber = mysqli_errno($this);
+			$this->errorMessage = mysqli_error($this);
+		}
+
+
 		$this->errorLocation = $location;
-		if($this->errorNumber && $this->show_error_messages){
-			echo('<br /><b>'.$this->errorLocation.'</b><br />'.$this->errorMessage);
-			flush();
+		if($this->errorNumber) {
+			$error_msg = $this->errorLocation .' '. $this->errorMessage;
+			// This right here will allow us to use the same file for server & interface
+			if($this->show_error_messages && $conf['demo_mode'] === false) {
+				echo $error_msg;
+			} else if(is_object($app) && method_exists($app, 'log')) {
+					$app->log($error_msg, LOGLEVEL_WARN);
+				}
 		}
 	}
 
-	public function connect()
-	{
-		if($this->linkId == 0){
-			$this->linkId = mysql_connect($this->dbHost, $this->dbUser, $this->dbPass);
-			if(!$this->linkId){
-				$this->updateError('DB::connect()<br />mysql_connect');
-				return false;
+	private function setCharacterEncoding() {
+		if($this->isConnected == false) return false;
+		parent::query( 'SET NAMES '.$this->dbCharset);
+		parent::query( "SET character_set_results = '".$this->dbCharset."', character_set_client = '".$this->dbCharset."', character_set_connection = '".$this->dbCharset."', character_set_database = '".$this->dbCharset."', character_set_server = '".$this->dbCharset."'");
+	}
+
+	public function query($queryString) {
+		global $conf;
+		if($this->isConnected == false) return false;
+		$try = 0;
+		do {
+			$try++;
+			$ok = $this->ping();
+			if(!$ok) {
+				if(!$this->real_connect($this->dbHost, $this->dbUser, $this->dbPass, $this->dbName)) {
+					if($try > 4) {
+						$this->updateError('DB::query -> reconnect');
+						return false;
+					} else {
+						sleep(1);
+					}
+				} else {
+					$this->setCharacterEncoding();
+					$ok = true;
+				}
 			}
-    		$this->queryId = @mysql_query('SET NAMES '.$this->dbCharset, $this->linkId);
-			$this->queryId = @mysql_query("SET character_set_results = '".$this->dbCharset."', character_set_client = '".$this->dbCharset."', character_set_connection = '".$this->dbCharset."', character_set_database = '".$this->dbCharset."', character_set_server = '".$this->dbCharset."'", $this->linkId);
-		}
-		return true;
-	}
-
-	public function query($queryString)
-	{
-		if(!$this->connect()){
-			return false;
-		}
-		if(!mysql_select_db($this->dbName, $this->linkId)){
-			$this->updateError('DB::connect()<br />mysql_select_db');
-			return false;
-		}
-		$this->queryId = @mysql_query($queryString, $this->linkId);
-		$this->updateError('DB::query('.$queryString.')<br />mysql_query');
-		if(!$this->queryId){
+		} while($ok == false);
+		$this->queryId = parent::query($queryString);
+		$this->updateError('DB::query('.$queryString.') -> mysqli_query');
+		if($this->errorNumber && $conf['demo_mode'] === false) debug_print_backtrace();
+		if(!$this->queryId) {
 			return false;
 		}
 		$this->currentRow = 0;
 		return $this->queryId;
 	}
 
-	/** Returns all records as an array */
-	public function queryAllRecords($queryString)
-	{
-		if(!$this->query($queryString)){
+	// returns all records in an array
+	public function queryAllRecords($queryString) {
+		if(!$this->query($queryString))
+		{
 			return false;
 		}
 		$ret = array();
-		while($line = $this->nextRecord()){
+		while($line = $this->nextRecord())
+		{
 			$ret[] = $line;
 		}
 		return $ret;
 	}
 
-	/** Returns one row as an array */
-	public function queryOneRecord($queryString)
-	{
-		if(!$this->query($queryString) || $this->numRows() == 0){
+	// returns one record in an array
+	public function queryOneRecord($queryString) {
+		if(!$this->query($queryString) || $this->numRows() == 0)
+		{
 			return false;
 		}
 		return $this->nextRecord();
 	}
 
-	/** Returns the next record as an array */
-	public function nextRecord()
-	{
-	$this->record = mysql_fetch_assoc($this->queryId);
-		$this->updateError('DB::nextRecord()<br />mysql_fetch_array');
-		if(!$this->record || !is_array($this->record)){
+	// returns the next record in an array
+	public function nextRecord() {
+		$this->record = $this->queryId->fetch_assoc();
+		$this->updateError('DB::nextRecord()-> mysql_fetch_array');
+		if(!$this->record || !is_array($this->record))
+		{
 			return false;
 		}
 		$this->currentRow++;
 		return $this->record;
 	}
 
-	/** Returns the number of rows returned by the last select query */
-	public function numRows()
-    {
-		return mysql_num_rows($this->queryId);
+	// returns number of rows returned by the last select query
+	public function numRows() {
+		return intval($this->queryId->num_rows);
 	}
 
-	public function affectedRows()
-    {
-		return mysql_affected_rows($this->linkId);
+	public function affectedRows() {
+		return intval($this->queryId->affected_rows);
 	}
-		
-	/** Returns the last mySQL insert_id() */
-	public function insertID()
-	{
-		return mysql_insert_id($this->linkId);
+
+	// returns mySQL insert id
+	public function insertID() {
+		return $this->insert_id;
 	}
-        
-    /** Checks a variable - Depreciated, use quote() */
-    public function check($formfield)
-    {
-        return $this->quote($formfield);
-    }
-		
-	/** Escapes quotes in variable. mysql_real_escape_string() */
-    public function quote($formfield)
-    {	
-		if(!$this->connect()){
-			$this->updateError('WARNING: mysql_connect: Used addslashes instead of mysql_real_escape_string');
-			return addslashes($formfield);
-		}
-        return mysql_real_escape_string($formfield, $this->linkId);
-    }
-		
-	/** Unquotes a variable, strip_slashes() */
-    public function unquote($formfield)
-    {
-        return stripslashes($formfield);
-    }
-		
-	public function toLower($record)
-    {
-		if(is_array($record)){
+
+
+	//* Function to quote strings
+	public function quote($formfield) {
+		return $this->escape_string($formfield);
+	}
+
+	//* Function to unquotae strings
+	public function unquote($formfield) {
+		return stripslashes($formfield);
+	}
+
+	public function toLower($record) {
+		if(is_array($record)) {
 			foreach($record as $key => $val) {
 				$key = strtolower($key);
 				$out[$key] = $val;
 			}
 		}
-	    return $out;
+		return $out;
 	}
-       
-    // deprecated
-	/*
-    public function insert($tablename, $form, $debug = 0)
-    {
-        if(is_array($form)){
-	        foreach($form as $key => $value){
-                $sql_key .= "$key, ";
-                $sql_value .= "'".$this->check($value)."', ";
-            }
-            $sql_key = substr($sql_key,0,strlen($sql_key) - 2);
-            $sql_value = substr($sql_value,0,strlen($sql_value) - 2);
-            $sql = "INSERT INTO $tablename (".$sql_key.') VALUES ('.$sql_value.')';
-            //TODO: where has $debug come from !???
-            if($debug == 1){ echo "SQL-Statement: $sql<br><br>"; }
-            $this->query($sql);
-            if($debug == 1){ echo 'mySQL Error Message: '.$this->errorMessage; }
-        }
-    }
-    
-	// Deprecated
-    public function update($tablename, $form, $bedingung, $debug = 0)
-    {
-	    if(is_array($form)){
-            foreach($form as $key => $value){
-                $insql .= "$key = '".$this->check($value)."', ";
-            }
-            $insql = substr($insql, 0, strlen($insql) - 2);
-            $sql = "UPDATE $tablename SET " . $insql . " WHERE $bedingung";
-            if($debug == 1){ echo "SQL-Statement: $sql<br><br>"; }
-            $this->query($sql);
-            if($debug == 1){ echo 'mySQL Error Message: '.$this->errorMessage; }
-        }
-    }
-	*/
 
 	public function diffrec($record_old, $record_new) {
 		$diffrec_full = array();
@@ -228,10 +230,10 @@
 		if(is_array($record_old) && count($record_old) > 0) {
 			foreach($record_old as $key => $val) {
 				// if(!isset($record_new[$key]) || $record_new[$key] != $val) {
-				if($record_new[$key] != $val) {
+				if(@$record_new[$key] != $val) {
 					// Record has changed
 					$diffrec_full['old'][$key] = $val;
-					$diffrec_full['new'][$key] = $record_new[$key];
+					$diffrec_full['new'][$key] = @$record_new[$key];
 					$diff_num++;
 				} else {
 					$diffrec_full['old'][$key] = $val;
@@ -251,31 +253,38 @@
 				}
 			}
 		}
-		
-		return array('diff_num' => $diff_num, 'diff_rec' => $diffrec_full);
-		
-	}
-	
-	//** Function to fill the datalog with a full differential record.
-	public function datalogSave($db_table, $action, $primary_field, $primary_id, $record_old, $record_new) {
-		global $app,$conf;
 
-		// Insert backticks only for incomplete table names.
-		if(stristr($db_table,'.')) {
-			$escape = '';
+		return array('diff_num' => $diff_num, 'diff_rec' => $diffrec_full);
+
+	}
+
+	//** Function to fill the datalog with a full differential record.
+	public function datalogSave($db_table, $action, $primary_field, $primary_id, $record_old, $record_new, $force_update = false) {
+		global $app, $conf;
+
+		// Check fields
+		if(!preg_match('/^[a-zA-Z0-9\-\_\.]{1,64}$/',$db_table)) $app->error('Invalid table name '.$db_table);
+		if(!preg_match('/^[a-zA-Z0-9\-\_]{1,64}$/',$primary_field)) $app->error('Invalid primary field '.$primary_field.' in table '.$db_table);
+		
+		$primary_field = $this->quote($primary_field);
+		$primary_id = intval($primary_id);
+
+		if($force_update == true) {
+			//* We force a update even if no record has changed
+			$diffrec_full = array('new' => $record_new, 'old' => $record_old);
+			$diff_num = count($record_new);
 		} else {
-			$escape = '`';
+			//* get the difference record between old and new record
+			$tmp = $this->diffrec($record_old, $record_new);
+			$diffrec_full = $tmp['diff_rec'];
+			$diff_num = $tmp['diff_num'];
+			unset($tmp);
 		}
 
-		$tmp = $this->diffrec($record_old, $record_new);
-		$diffrec_full = $tmp['diff_rec'];
-		$diff_num = $tmp['diff_num'];
-		unset($tmp);
-		
 		// Insert the server_id, if the record has a server_id
 		$server_id = (isset($record_old['server_id']) && $record_old['server_id'] > 0)?$record_old['server_id']:0;
 		if(isset($record_new['server_id'])) $server_id = $record_new['server_id'];
-		
+		$server_id = intval($server_id);
 
 		if($diff_num > 0) {
 			//print_r($diff_num);
@@ -283,7 +292,7 @@
 			$diffstr = $app->db->quote(serialize($diffrec_full));
 			$username = $app->db->quote($_SESSION['s']['user']['username']);
 			$dbidx = $primary_field.':'.$primary_id;
-						
+
 			if($action == 'INSERT') $action = 'i';
 			if($action == 'UPDATE') $action = 'u';
 			if($action == 'DELETE') $action = 'd';
@@ -293,264 +302,400 @@
 
 		return true;
 	}
-	
+
 	//** Inserts a record and saves the changes into the datalog
 	public function datalogInsert($tablename, $insert_data, $index_field) {
 		global $app;
 		
-		$old_rec = array();
-		$this->query("INSERT INTO $tablename $insert_data");
-		$index_value = $this->insertID();
-		$new_rec = $this->queryOneRecord("SELECT * FROM $tablename WHERE $index_field = '$index_value'");
-		$this->datalogSave($tablename, 'INSERT', $index_field, $index_value, $old_rec, $new_rec);
+		// Check fields
+		if(!preg_match('/^[a-zA-Z0-9\-\_\.]{1,64}$/',$tablename)) $app->error('Invalid table name '.$tablename);
+		if(!preg_match('/^[a-zA-Z0-9\-\_]{1,64}$/',$index_field)) $app->error('Invalid index field '.$index_field.' in table '.$tablename);
 		
+		if(strpos($tablename, '.') !== false) {
+			$tablename_escaped = preg_replace('/^(.+)\.(.+)$/', '`$1`.`$2`', $tablename);
+		} else {
+			$tablename_escaped = '`' . $tablename . '`';
+		}
+		
+		$index_field = $this->quote($index_field);
+
+		if(is_array($insert_data)) {
+			$key_str = '';
+			$val_str = '';
+			foreach($insert_data as $key => $val) {
+				$key_str .= "`".$key ."`,";
+				$val_str .= "'".$this->quote($val)."',";
+			}
+			$key_str = substr($key_str, 0, -1);
+			$val_str = substr($val_str, 0, -1);
+			$insert_data_str = '('.$key_str.') VALUES ('.$val_str.')';
+		} else {
+			$insert_data_str = $insert_data;
+		}
+
+		$old_rec = array();
+		$this->query("INSERT INTO $tablename_escaped $insert_data_str");
+		$index_value = $this->insertID();
+		$new_rec = $this->queryOneRecord("SELECT * FROM $tablename_escaped WHERE $index_field = '$index_value'");
+		$this->datalogSave($tablename, 'INSERT', $index_field, $index_value, $old_rec, $new_rec);
+
 		return $index_value;
 	}
-	
+
 	//** Updates a record and saves the changes into the datalog
-	public function datalogUpdate($tablename, $update_data, $index_field, $index_value) {
+	public function datalogUpdate($tablename, $update_data, $index_field, $index_value, $force_update = false) {
 		global $app;
 		
-		$old_rec = $this->queryOneRecord("SELECT * FROM $tablename WHERE $index_field = '$index_value'");
-		$this->query("UPDATE $tablename SET $update_data WHERE $index_field = '$index_value'");
-		$new_rec = $this->queryOneRecord("SELECT * FROM $tablename WHERE $index_field = '$index_value'");
-		$this->datalogSave($tablename, 'UPDATE', $index_field, $index_value, $old_rec, $new_rec);
+		// Check fields
+		if(!preg_match('/^[a-zA-Z0-9\-\_\.]{1,64}$/',$tablename)) $app->error('Invalid table name '.$tablename);
+		if(!preg_match('/^[a-zA-Z0-9\-\_]{1,64}$/',$index_field)) $app->error('Invalid index field '.$index_field.' in table '.$tablename);
 		
+		if(strpos($tablename, '.') !== false) {
+			$tablename_escaped = preg_replace('/^(.+)\.(.+)$/', '`$1`.`$2`', $tablename);
+		} else {
+			$tablename_escaped = '`' . $tablename . '`';
+		}
+		
+		$index_field = $this->quote($index_field);
+		$index_value = $this->quote($index_value);
+
+		$old_rec = $this->queryOneRecord("SELECT * FROM $tablename_escaped WHERE $index_field = '$index_value'");
+
+		if(is_array($update_data)) {
+			$update_data_str = '';
+			foreach($update_data as $key => $val) {
+				$update_data_str .= "`".$key ."` = '".$this->quote($val)."',";
+			}
+			$update_data_str = substr($update_data_str, 0, -1);
+		} else {
+			$update_data_str = $update_data;
+		}
+
+		$this->query("UPDATE $tablename_escaped SET $update_data_str WHERE $index_field = '$index_value'");
+		$new_rec = $this->queryOneRecord("SELECT * FROM $tablename_escaped WHERE $index_field = '$index_value'");
+		$this->datalogSave($tablename, 'UPDATE', $index_field, $index_value, $old_rec, $new_rec, $force_update);
+
 		return true;
 	}
-	
+
 	//** Deletes a record and saves the changes into the datalog
 	public function datalogDelete($tablename, $index_field, $index_value) {
 		global $app;
 		
-		$old_rec = $this->queryOneRecord("SELECT * FROM $tablename WHERE $index_field = '$index_value'");
-		$this->query("DELETE FROM $tablename WHERE $index_field = '$index_value'");
+		// Check fields
+		if(!preg_match('/^[a-zA-Z0-9\-\_\.]{1,64}$/',$tablename)) $app->error('Invalid table name '.$tablename);
+		if(!preg_match('/^[a-zA-Z0-9\-\_]{1,64}$/',$index_field)) $app->error('Invalid index field '.$index_field.' in table '.$tablename);
+		
+		if(strpos($tablename, '.') !== false) {
+			$tablename_escaped = preg_replace('/^(.+)\.(.+)$/', '`$1`.`$2`', $tablename);
+		} else {
+			$tablename_escaped = '`' . $tablename . '`';
+		}
+		
+		$index_field = $this->quote($index_field);
+		$index_value = $this->quote($index_value);
+
+		$old_rec = $this->queryOneRecord("SELECT * FROM $tablename_escaped WHERE $index_field = '$index_value'");
+		$this->query("DELETE FROM $tablename_escaped WHERE $index_field = '$index_value'");
 		$new_rec = array();
 		$this->datalogSave($tablename, 'DELETE', $index_field, $index_value, $old_rec, $new_rec);
-		
+
 		return true;
 	}
 
+	//* get the current datalog status for the specified login (or currently logged in user)
+	public function datalogStatus($login = '') {
+		global $app;
 
-       
-    public function closeConn()
-    {
-    	if($this->linkId)
-    	{
-    		mysql_close($this->linkId);
-    		return true;
-    	} else { return false; }
-    }
-    
-    public function freeResult($query) 
-    {
-    	if(mysql_free_result($query))
-    	{
-    		return true;
-    	} else {
-    		return false;
-    	}
-    }
-    
+		$return = array('count' => 0, 'entries' => array());
+		if($_SESSION['s']['user']['typ'] == 'admin') return $return; // these information should not be displayed to admin users
+
+		if($login == '' && isset($_SESSION['s']['user'])) {
+			$login = $_SESSION['s']['user']['username'];
+		}
+
+		$result = $this->queryAllRecords("SELECT COUNT( * ) AS cnt, sys_datalog.action, sys_datalog.dbtable FROM sys_datalog, server WHERE server.server_id = sys_datalog.server_id AND sys_datalog.user = '" . $this->quote($login) . "' AND sys_datalog.datalog_id > server.updated GROUP BY sys_datalog.dbtable, sys_datalog.action");
+		foreach($result as $row) {
+			if(!$row['dbtable'] || in_array($row['dbtable'], array('aps_instances', 'aps_instances_settings', 'mail_access', 'mail_content_filter'))) continue; // ignore some entries, maybe more to come
+			$return['entries'][] = array('table' => $row['dbtable'], 'action' => $row['action'], 'count' => $row['cnt'], 'text' => $app->lng('datalog_status_' . $row['action'] . '_' . $row['dbtable']));
+			$return['count'] += $row['cnt'];
+		}
+		unset($result);
+
+		return $return;
+	}
+
+
+	public function freeResult($query)
+	{
+		if(is_object($query) && (get_class($query) == "mysqli_result")) {
+			$query->free();
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/* TODO: Does anything use this? */
+	public function delete() {
+
+	}
+
+	/* TODO: Does anything use this? */
+	public function Transaction($action) {
+		//action = begin, commit oder rollback
+
+	}
+
 	/*
-    public function delete()
-    {
-    }
-	*/
-    
+       $columns = array(action =>   add | alter | drop
+       name =>     Spaltenname
+       name_new => neuer Spaltenname, nur bei 'alter' belegt
+       type =>     42go-Meta-Type: int16, int32, int64, double, char, varchar, text, blob
+       typeValue => Wert z.B. bei Varchar
+       defaultValue =>  Default Wert
+       notNull =>   true | false
+       autoInc =>   true | false
+       option =>   unique | primary | index)
+
+
+     */
+
+	public function createTable($table_name, $columns) {
+		$index = '';
+		$sql = "CREATE TABLE $table_name (";
+		foreach($columns as $col){
+			$sql .= $col['name'].' '.$this->mapType($col['type'], $col['typeValue']).' ';
+
+			if($col['defaultValue'] != '') $sql .= "DEFAULT '".$col['defaultValue']."' ";
+			if($col['notNull'] == true) {
+				$sql .= 'NOT NULL ';
+			} else {
+				$sql .= 'NULL ';
+			}
+			if($col['autoInc'] == true) $sql .= 'auto_increment ';
+			$sql.= ',';
+			// key Definitionen
+			if($col['option'] == 'primary') $index .= 'PRIMARY KEY ('.$col['name'].'),';
+			if($col['option'] == 'index') $index .= 'INDEX ('.$col['name'].'),';
+			if($col['option'] == 'unique') $index .= 'UNIQUE ('.$col['name'].'),';
+		}
+		$sql .= $index;
+		$sql = substr($sql, 0, -1);
+		$sql .= ')';
+		$this->query($sql);
+		return true;
+	}
+
 	/*
-    public function Transaction($action)
-    {
-        //action = begin, commit oder rollback
-    }
-	*/
-    
-    /** Creates a database table with the following format for the $columns array   
-    * <code>
-    * $columns = array(action =>   add | alter | drop
-    *                  name =>     Spaltenname
-    *                  name_new => neuer Spaltenname, nur bei 'alter' belegt
-    *                  type =>     42go-Meta-Type: int16, int32, int64, double, char, varchar, text, blob
-    *                  typeValue => Wert z.B. bei Varchar
-    *                  defaultValue =>  Default Wert
-    *                  notNull =>   true | false
-    *                  autoInc =>   true | false
-    *                  option =>   unique | primary | index)
-    * </code>   
-    */
-	
-	
-    public function createTable($table_name, $columns)
-    {
-        $index = '';
-        $sql = "CREATE TABLE $table_name (";
-        foreach($columns as $col){
-            $sql .= $col['name'].' '.$this->mapType($col['type'], $col['typeValue']).' ';
-            //* Set default value
-            if(isset($col['defaultValue']) && $col['defaultValue'] != '') {
-			    if($col['defaultValue'] == 'NULL' or $col['defaultValue'] == 'NOT NULL') {
-				    $sql .= 'DEFAULT '.$col['defaultValue'].' ';
-			    } else {
-				    $sql .= "DEFAULT '".$col['defaultValue']."' ";
-			    }
-		    } elseif($col['defaultValue'] != false) {
-			    $sql .= "DEFAULT '' ";
-		    }
-		    if(isset($col['defaultValue']) && $col['defaultValue'] != 'NULL' && $col['defaultValue'] != 'NOT NULL') {
-                if($col['notNull'] == true) {
-                    $sql .= 'NOT NULL ';
-                } else {
-                    $sql .= 'NULL ';
-                }
-		    }
-            if(isset($col['autoInc']) && $col['autoInc'] == true){ $sql .= 'auto_increment '; }
-            $sql.= ',';
-            //* Index Definitions
-            if(isset($col['option']) && $col['option'] == 'primary'){ $index .= 'PRIMARY KEY ('.$col['name'].'),'; }
-            if(isset($col['option']) && $col['option'] == 'index'){   $index .= 'INDEX ('.$col['name'].'),'; }
-            if(isset($col['option']) && $col['option'] == 'unique'){  $index .= 'UNIQUE ('.$col['name'].'),'; }
-       }
-       $sql .= $index;
-       $sql = substr($sql,0,-1);
-       $sql .= ')';
-       $this->query($sql);
-       return true;
-    }
-       
-    /** Changes a table definition. The format for the $columns array is 
-    * <code>
-    * $columns = array(action =>   add | alter | drop
-    *                  name =>     Spaltenname
-    *                 name_new => neuer Spaltenname, nur bei 'alter' belegt
-    *                 type =>     42go-Meta-Type: int16, int32, int64, double, char, varchar, text, blob
-    *                 typeValue => Wert z.B. bei Varchar
-    *                 defaultValue =>  Default Wert
-    *                 notNull =>   true | false
-    *                 autoInc =>   true | false
-    *                 option =>   unique | primary | index)
-    */
-    public function alterTable($table_name,$columns)
-    {
-       $index = '';
-       $sql = "ALTER TABLE $table_name ";
-       foreach($columns as $col){
-            if($col['action'] == 'add'){
-                $sql .= 'ADD '.$col['name'].' '.$this->mapType($col['type'],$col['typeValue']).' ';
-            }elseif($col['action'] == 'alter') {
-                $sql .= 'CHANGE '.$col['name'].' '.$col['name_new'].' '.$this->mapType($col['type'],$col['typeValue']).' ';
-            }elseif($col['action'] == 'drop') {
-                $sql .= 'DROP '.$col['name'].' ';
-            }
-            if($col['action'] != 'drop') {  
-            if($col['defaultValue'] != '') $sql .= "DEFAULT '".$col['defaultValue']."' ";
-            if($col['notNull'] == true) {
-                $sql .= 'NOT NULL ';
-            } else {
-                $sql .= 'NULL ';
-            }
-            if($col['autoInc'] == true) $sql .= 'auto_increment ';
-            $sql.= ',';
-            //* Index definitions
-            if($col['option'] == 'primary') $index .= 'PRIMARY KEY ('.$col['name'].'),';
-            if($col['option'] == 'index') $index .= 'INDEX ('.$col['name'].'),';
-            if($col['option'] == 'unique') $index .= 'UNIQUE ('.$col['name'].'),';
-            }
-       }
-       $sql .= $index;
-       $sql = substr($sql,0,-1);
-       //die($sql);
-       $this->query($sql);
-       return true;
-    }
-       
-    public function dropTable($table_name) 
-    {
-        $this->check($table_name);
-        $sql = "DROP TABLE '". $table_name."'";
-        return $this->query($sql);
-    }
-       
-    /** Return an array of table names */
-    public function getTables($database_name = '')
-    {
-		if($database_name == ''){
-            $database_name = $this->dbName;
-        }
-        $result = @mysql_list_tables($database_name);
-        $tb_names = array();
-        for ($i = 0; $i < @mysql_num_rows($result); $i++) {
-            $tb_names[$i] = @mysql_tablename($result, $i);
-        }
-        return $tb_names;       
-    }
-       
-       
-    public function tableInfo($table_name) {
-        //* Tabellenfelder einlesen ?
-        if($rows = $this->queryAllRecords('SHOW FIELDS FROM '.$table_name)){
-        foreach($rows as $row) {
-            $name    = $row['Field'];
-            $default = $row['Default'];
-            $key     = $row['Key'];
-            $extra   = $row['Extra'];
-            $isnull  = $row['Null'];
-            $type    = $row['Type'];
-        
-            $column = array('name' => $name, 'defaultValue' => $default);
-            //$column["type"] = $type;
-            if(stristr($key, 'PRI')){ $column['option'] = 'primary'; }
-            $column['notNull'] = stristr($isnull,'YES') ? false : true;
-            if($extra == 'auto_increment'){ $column['autoInc'] = true; }         
-            
-            //* Get the Data and Metatype
-            if( stristr($type, 'int(') ){    $metaType = 'int32'; }
-            if( stristr($type, 'bigint') ){  $metaType = 'int64'; }
-            if( stristr($type, 'char') ) {
-                $metaType = 'char';
-                $tmp_typeValue = explode('(',$type);
-                $column['typeValue'] = substr($tmp_typeValue[1], 0, -1);  
-            }
-            if( stristr($type, 'varchar') ){
-                $metaType = 'varchar';
-                $tmp_typeValue = explode('(',$type);
-                $column['typeValue'] = substr($tmp_typeValue[1], 0, -1);  
-            }
-            if(stristr($type,'text'))   $metaType = 'text';
-            if(stristr($type,'double')) $metaType = 'double';
-            if(stristr($type,'blob'))   $metaType = 'blob';
-            
-            $column['type'] = $metaType;
-            $columns[] = $column;
-        }
-            return $columns;
-        } else {
-            return false;
-        }
-    }
-       
-    public function mapType($metaType, $typeValue) {
-        //TODO: ? this is not required ?? global $go_api;
-        $metaType = strtolower($metaType);
-        switch ($metaType) {
-        case 'int16':
-            return 'smallint';
-        case 'int32':
-            return 'int';
-        case 'int64':
-            return 'bigint';
-        case 'double':
-            return 'double';
-        case 'char':
-            return 'char';
-        case 'varchar':
-            if($typeValue < 1) die('Datenbank Fehler: F�r diesen Datentyp ist eine L�ngenangabe notwendig.');
-            return 'varchar('.$typeValue.')';
-        case 'text':
-            return 'text';
-        case 'blob':
-            return 'blob';
-        }
-    }
+       $columns = array(action =>   add | alter | drop
+       name =>     Spaltenname
+       name_new => neuer Spaltenname, nur bei 'alter' belegt
+       type =>     42go-Meta-Type: int16, int32, int64, double, char, varchar, text, blob
+       typeValue => Wert z.B. bei Varchar
+       defaultValue =>  Default Wert
+       notNull =>   true | false
+       autoInc =>   true | false
+       option =>   unique | primary | index)
+
+
+     */
+	public function alterTable($table_name, $columns) {
+		$index = '';
+		$sql = "ALTER TABLE $table_name ";
+		foreach($columns as $col){
+			if($col['action'] == 'add') {
+				$sql .= 'ADD '.$col['name'].' '.$this->mapType($col['type'], $col['typeValue']).' ';
+			} elseif ($col['action'] == 'alter') {
+				$sql .= 'CHANGE '.$col['name'].' '.$col['name_new'].' '.$this->mapType($col['type'], $col['typeValue']).' ';
+			} elseif ($col['action'] == 'drop') {
+				$sql .= 'DROP '.$col['name'].' ';
+			}
+			if($col['action'] != 'drop') {
+				if($col['defaultValue'] != '') $sql .= "DEFAULT '".$col['defaultValue']."' ";
+				if($col['notNull'] == true) {
+					$sql .= 'NOT NULL ';
+				} else {
+					$sql .= 'NULL ';
+				}
+				if($col['autoInc'] == true) $sql .= 'auto_increment ';
+				$sql.= ',';
+				// Index definitions
+				if($col['option'] == 'primary') $index .= 'PRIMARY KEY ('.$col['name'].'),';
+				if($col['option'] == 'index') $index .= 'INDEX ('.$col['name'].'),';
+				if($col['option'] == 'unique') $index .= 'UNIQUE ('.$col['name'].'),';
+			}
+		}
+		$sql .= $index;
+		$sql = substr($sql, 0, -1);
+
+		//die($sql);
+		$this->query($sql);
+		return true;
+	}
+
+	public function dropTable($table_name) {
+		$this->check($table_name);
+		$sql = "DROP TABLE '". $table_name."'";
+		return $this->query($sql);
+	}
+
+	// gibt Array mit Tabellennamen zur�ck
+	public function getTables($database_name = '') {
+		if($this->isConnected == false) return false;
+		if($database_name == '') $database_name = $this->dbName;
+		$result = parent::query("SHOW TABLES FROM $database_name");
+		for ($i = 0; $i < $result->num_rows; $i++) {
+			$tb_names[$i] = (($result->data_seek( $i) && (($___mysqli_tmp = $result->fetch_row()) !== NULL)) ? array_shift($___mysqli_tmp) : false);
+		}
+		return $tb_names;
+	}
+
+	// gibt Feldinformationen zur Tabelle zur�ck
+	/*
+       $columns = array(action =>   add | alter | drop
+       name =>     Spaltenname
+       name_new => neuer Spaltenname, nur bei 'alter' belegt
+       type =>     42go-Meta-Type: int16, int32, int64, double, char, varchar, text, blob
+       typeValue => Wert z.B. bei Varchar
+       defaultValue =>  Default Wert
+       notNull =>   true | false
+       autoInc =>   true | false
+       option =>   unique | primary | index)
+
+
+     */
+
+	function tableInfo($table_name) {
+
+		global $go_api, $go_info, $app;
+		// Tabellenfelder einlesen
+
+		if($rows = $app->db->queryAllRecords('SHOW FIELDS FROM '.$table_name)){
+			foreach($rows as $row) {
+				/*
+	  $name = $row[0];
+	  $default = $row[4];
+	  $key = $row[3];
+	  $extra = $row[5];
+	  $isnull = $row[2];
+	  $type = $row[1];
+	  */
+
+				$name = $row['Field'];
+				$default = $row['Default'];
+				$key = $row['Key'];
+				$extra = $row['Extra'];
+				$isnull = $row['Null'];
+				$type = $row['Type'];
+
+
+				$column = array();
+
+				$column['name'] = $name;
+				//$column['type'] = $type;
+				$column['defaultValue'] = $default;
+				if(stristr($key, 'PRI')) $column['option'] = 'primary';
+				if(stristr($isnull, 'YES')) {
+					$column['notNull'] = false;
+				} else {
+					$column['notNull'] = true;
+				}
+				if($extra == 'auto_increment') $column['autoInc'] = true;
+
+
+				// Type in Metatype umsetzen
+
+				if(stristr($type, 'int(')) $metaType = 'int32';
+				if(stristr($type, 'bigint')) $metaType = 'int64';
+				if(stristr($type, 'char')) {
+					$metaType = 'char';
+					$tmp_typeValue = explode('(', $type);
+					$column['typeValue'] = substr($tmp_typeValue[1], 0, -1);
+				}
+				if(stristr($type, 'varchar')) {
+					$metaType = 'varchar';
+					$tmp_typeValue = explode('(', $type);
+					$column['typeValue'] = substr($tmp_typeValue[1], 0, -1);
+				}
+				if(stristr($type, 'text')) $metaType = 'text';
+				if(stristr($type, 'double')) $metaType = 'double';
+				if(stristr($type, 'blob')) $metaType = 'blob';
+
+
+				$column['type'] = $metaType;
+
+				$columns[] = $column;
+			}
+			return $columns;
+		} else {
+			return false;
+		}
+
+
+		//$this->createTable('tester',$columns);
+
+		/*
+	 $result = mysql_list_fields($go_info["server"]["db_name"],$table_name);
+	 $fields = mysql_num_fields ($result);
+	 $i = 0;
+	 $table = mysql_field_table ($result, $i);
+	 while ($i < $fields) {
+	 $name  = mysql_field_name  ($result, $i);
+	 $type  = mysql_field_type  ($result, $i);
+	 $len   = mysql_field_len   ($result, $i);
+	 $flags = mysql_field_flags ($result, $i);
+	 print_r($flags);
+
+	 $columns = array(name => $name,
+	 type =>     "",
+	 defaultValue =>  "",
+	 isnull =>   1,
+	 option =>   "");
+	 $returnvar[] = $columns;
+
+	 $i++;
+	 }
+       */
+
+
+
+	}
+
+	public function mapType($metaType, $typeValue) {
+		global $go_api;
+		$metaType = strtolower($metaType);
+		switch ($metaType) {
+		case 'int16':
+			return 'smallint';
+			break;
+		case 'int32':
+			return 'int';
+			break;
+		case 'int64':
+			return 'bigint';
+			break;
+		case 'double':
+			return 'double';
+			break;
+		case 'char':
+			return 'char';
+			break;
+		case 'varchar':
+			if($typeValue < 1) die('Database failure: Lenght required for these data types.');
+			return 'varchar('.$typeValue.')';
+			break;
+		case 'text':
+			return 'text';
+			break;
+		case 'blob':
+			return 'blob';
+			break;
+		case 'date':
+			return 'date';
+			break;
+		}
+	}
 
 }
 

--
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