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<?php
/**
* Akeeba Engine
* The modular PHP5 site backup engine
* @copyright Copyright (c)2009-2012 Nicholas K. Dionysopoulos
* @license GNU GPL version 3 or, at your option, any later version
* @package akeebaengine
* @version $Id: smart.php 604 2011-05-17 08:29:51Z nikosdion $
*/
// Protection against direct access
defined('AKEEBAENGINE') or die('Restricted access');
/* Windows system detection */
if(!defined('_AKEEBA_IS_WINDOWS'))
{
if (function_exists('php_uname'))
define('_AKEEBA_IS_WINDOWS', stristr(php_uname(), 'windows'));
else
define('_AKEEBA_IS_WINDOWS', DIRECTORY_SEPARATOR == '\\');
}
/**
* A filesystem scanner which uses opendir() and is smart enough to make large directories
* be scanned inside a step of their own.
*
* The idea is that if it's not the first operation of this step and the number of contained
* directories AND files is more than double the number of allowed files per fragment, we should
* break the step immediately.
*
*/
class AEScanSmart extends AEAbstractScan
{
private $method = 'opendir';
public function __construct() {
parent::__construct();
$this->method = AEFactory::getConfiguration()->get('engine.scan.smart.scan_method','opendir');
}
public function &getFiles($folder)
{
$registry =& AEFactory::getConfiguration();
// Was the breakflag set BEFORE starting? -- This workaround is required due to PHP5 defaulting to assigning variables by reference
$breakflag_before_process = $registry->get('volatile.breakflag', false);
// Reset break flag before continuing
$breakflag = false;
// Initialize variables
$arr = array();
$false = false;
if(!is_dir($folder) && !is_dir($folder.'/')) return $false;
$counter = 0;
$registry =& AEFactory::getConfiguration();
$maxCounter = $registry->get('engine.scan.smart.large_dir_threshold',100);
$allowBreakflag = ($registry->get('volatile.operation_counter', 0) != 0) && !$breakflag_before_process;
if($this->method == 'opendir') {
$handle = @opendir($folder);
/* If opening the directory doesn't work, try adding a trailing slash. This is useful in cases
* like this: open_basedir=/home/user/www/ and the root is /home/user/www. Trying to scan
* /home/user/www results in error, trying to scan /home/user/www/ succeeds. Duh!
*/
if ($handle === FALSE) {
$handle = @opendir($folder.'/');
}
// If directory is not accessible, just return FALSE
if ($handle === FALSE) {
$this->setWarning( 'Unreadable directory '.$folder);
return $false;
}
} else {
$handle = dir($folder);
if($handle->handle === false) {
$handle = dir($folder.'/');
if($handle->handle === false) {
$this->setWarning( 'Unreadable directory '.$folder);
return $false;
}
}
}
while ( (($file = ($this->method == 'opendir' ? @readdir($handle) : $handle->read()) ) !== false) && (!$breakflag) )
{
if (($file != '.') && ($file != '..'))
{
// # Fix 2.4.b1: Do not add DS if we are on the site's root and it's an empty string
// # Fix 2.4.b2: Do not add DS is the last character _is_ DS
$ds = ($folder == '') || ($folder == '/') || (@substr($folder, -1) == '/') || (@substr($folder, -1) == DIRECTORY_SEPARATOR) ? '' : DIRECTORY_SEPARATOR;
$dir = $folder . $ds . $file;
$isDir = is_dir($dir);
if (!$isDir) {
$data = _AKEEBA_IS_WINDOWS ? AEUtilFilesystem::TranslateWinPath($dir) : $dir;
if($data) $arr[] = $data;
}
}
$counter++;
if($counter >= $maxCounter) $breakflag = $allowBreakflag;
}
$this->method == 'opendir' ? @closedir($handle) : $handle->close();
// Save break flag status
$registry->set('volatile.breakflag', $breakflag);
return $arr;
}
public function &getFolders($folder)
{
// Was the breakflag set BEFORE starting? -- This workaround is required due to PHP5 defaulting to assigning variables by reference
$registry =& AEFactory::getConfiguration();
$breakflag_before_process = $registry->get('volatile.breakflag', false);
// Reset break flag before continuing
$breakflag = false;
// Initialize variables
$arr = array();
$false = false;
if(!is_dir($folder) && !is_dir($folder.'/')) return $false;
$counter = 0;
$registry =& AEFactory::getConfiguration();
$maxCounter = $registry->get('engine.scan.smart.large_dir_threshold',100);
$allowBreakflag = ($registry->get('volatile.operation_counter', 0) != 0) && !$breakflag_before_process;
if($this->method == 'opendir') {
$handle = @opendir($folder);
/* If opening the directory doesn't work, try adding a trailing slash. This is useful in cases
* like this: open_basedir=/home/user/www/ and the root is /home/user/www. Trying to scan
* /home/user/www results in error, trying to scan /home/user/www/ succeeds. Duh!
*/
if ($handle === FALSE) {
$handle = @opendir($folder.'/');
}
// If directory is not accessible, just return FALSE
if ($handle === FALSE) {
$this->setWarning( 'Unreadable directory '.$folder);
return $false;
}
} else {
$handle = dir($folder);
if($handle->handle === false) {
$handle = dir($folder.'/');
if($handle->handle === false) {
$this->setWarning( 'Unreadable directory '.$folder);
return $false;
}
}
}
while ( (($file = ($this->method == 'opendir' ? @readdir($handle) : $handle->read()) ) !== false) && (!$breakflag) )
{
if (($file != '.') && ($file != '..'))
{
// # Fix 2.4: Do not add DS if we are on the site's root and it's an empty string
$ds = ($folder == '') || ($folder == '/') || (@substr($folder, -1) == '/') || (@substr($folder, -1) == DIRECTORY_SEPARATOR) ? '' : DIRECTORY_SEPARATOR;
$dir = $folder . $ds . $file;
$isDir = is_dir($dir);
if ($isDir) {
$data = _AKEEBA_IS_WINDOWS ? AEUtilFilesystem::TranslateWinPath($dir) : $dir;
if($data) $arr[] = $data;
}
}
$counter++;
if($counter >= $maxCounter) $breakflag = $allowBreakflag;
}
$this->method == 'opendir' ? @closedir($handle) : $handle->close();
// Save break flag status
$registry->set('volatile.breakflag', $breakflag);
return $arr;
}
}