118 Zeilen
3.1 KiB
PHP
118 Zeilen
3.1 KiB
PHP
<?php
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/**
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* Project:
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* Contenido Content Management System
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*
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* Description:
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* PHPLIB Data Storage Container using Shared Memory
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*
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* Requirements:
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* @con_php_req 5
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* @con_template <Templatefiles>
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* @con_notice <Notice>
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*
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*
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* @package ContenidoBackendArea
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* @version 1.2
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* @author Sascha Schumann <sascha@schumann.cx>
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* @copyright four for business AG <www.4fb.de>
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* @license http://www.contenido.org/license/LIZENZ.txt
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* @link http://www.4fb.de
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* @link http://www.contenido.org
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* @since file available since contenido release <Contenido Version>
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* @deprecated file deprecated in contenido release <Contenido Version>
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*
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* {@internal
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* created 2000-01-01
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* modified 2008-07-03, bilal arslan, added security fix
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*
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* $Id$:
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* }}
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*
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*/
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if(!defined('CON_FRAMEWORK')) {
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die('Illegal call');
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}
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class CT_Shm {
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##
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## Define these parameters by overwriting or by
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## deriving your own class from it (recommened)
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##
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var $max_sessions = 500; ## maximum supported sessions
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var $shm_key = 900000; ## key of shared memory segment (unique)
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var $shm_size = 64000; ## size in bytes
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## end of configuration
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var $shmid; ## our shared memory handle
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var $semid; ## our semaphore handle
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function extract($id) {
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return substr($id, 0, strpos($id, "_"));
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}
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function ac_start() {
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$this->shmid = shm_attach($this->shm_key, $this->shm_size, 0600);
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}
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function ac_get_lock() {
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$this->semid = sem_get($this->shm_key + 1);
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sem_acquire($this->semid);
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}
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function ac_release_lock() {
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shm_detach($this->shmid);
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sem_release($this->semid);
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}
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function ac_newid($str, $name) {
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for($i = 1; $i <= $this->max_sessions &&
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(@shm_get_var($this->shmid, $i) != false); $i++);
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$id = $i."_".$str;
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$this->ac_store($id, $name, "");
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return $id;
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}
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function ac_store($id, $name, $str) {
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$val = "$id;".urlencode($name).";".urlencode($str).";".time();
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shm_put_var($this->shmid, $this->extract($id), $val);
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return true;
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}
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function ac_delete($id, $name) {
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shm_remove_var($this->shmid, $this->extract($id));
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}
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function ac_gc($gc_time, $name) {
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$cmp = time() - $gc_time * 60;
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for($i = 1; $i <= $this->max_sessions; $i++) {
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if(($val = @shm_get_var($this->shmid, $i)) != false) {
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$dat = explode(";", $val);
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if($name == $dat[1] && intval($dat[3]) < $cmp) {
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shm_remove_var($this->shmid, $i);
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}
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}
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}
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}
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function ac_halt($s) {
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echo "<b>$s</b>";
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exit;
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}
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function ac_get_value($id, $name) {
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$i = $this->extract($id);
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$var = shm_get_var($this->shmid, $i);
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if($var == "") return("");
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$dat = explode(";", $var);
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## if classname or md5 id does not match...
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if($name != urldecode($dat[1]) || $dat[0] != $id)
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$this->ac_halt("security stop");
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return urldecode($dat[2]);
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}
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}
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?>
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