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<?php
defined("ABSPATH") or die("");
use Duplicator\Libs\Snap\SnapOS;
use Duplicator\Libs\Snap\SnapUtil;
/**
* Runs a recursive scan on a directory and finds symlinks and unreadable files
* and returns the results as an array
*
* @package DupicatorPro\classes
*/
class DUP_PRO_ScanValidator
{
/** @var string[] Paths to scan */
public $scanPaths = array();
/** @var int The number of files scanned */
public $fileCount = 0;
/** @var int The number of directories scanned*/
public $dirCount = 0;
/** @var int The maximum count of files before the recursive function stops */
public $maxFiles = 1000000;
/** @var int The maximum count of directories before the recursive function stops */
public $maxDirs = 75000;
/** @var bool Recursively scan the root directory provided */
public $recursion = true;
/** @var string[] Stores a list of symbolic link files */
public $symLinks = array();
/** @var string[] Stores a list of files unreadable by PHP */
public $unreadable = array();
/** @var string[] Stores a list of directories with UTF8 settings */
public $nameTestDirs = array();
/** @var string[] Stores a list of files with utf8 settings */
public $nameTestFiles = array();
/** @var bool If the maxFiles or maxDirs limit is reached then true */
protected $limitReached = false;
/**
* Class constructor
*/
public function __construct()
{
}
/**
* Run the scan
*
* @param string[] $scanPaths An array of paths to scan
*
* @return self The scan check object with the results of the scan
*/
public function run($scanPaths)
{
$this->scanPaths = $scanPaths;
foreach ($this->scanPaths as $path) {
$this->recursiveScan($path);
}
return $this;
}
/**
* Start the scan process
*
* @param string $dir A valid directory path where the scan will run
* @param string[] $results Used for recursion, do not pass in value with calling
*
* @return self The scan check object with the results of the scan
*/
private function recursiveScan($dir, &$results = array())
{
//Stop Recursion if Max search is reached
if ($this->fileCount > $this->maxFiles || $this->dirCount > $this->maxDirs) {
$this->limitReached = true;
return $this;
}
$files = array_diff(@scandir($dir), array('..', '.'));
if (is_array($files)) {
foreach ($files as $key => $value) {
$path = $dir . '/' . $value;
//Files
if (!is_dir($path)) {
if (!is_readable($path)) {
$results[] = $path;
$this->unreadable[] = $path;
} elseif ($this->isLink($path)) {
$results[] = $path;
$this->symLinks[] = $path;
} else {
$name = basename($path);
$invalid_test = preg_match('/(\/|\*|\?|\>|\<|\:|\\|\|)/', $name) || trim($name) == '' || (strrpos($name, '.') == strlen($name) - 1 && substr($name, -1) == '.') || preg_match('/[^\x20-\x7f]/', $name);
if ($invalid_test) {
if (!SnapUtil::isPHP7Plus() && SnapOS::isWindows()) {
$this->nameTestFiles[] = utf8_decode($path);
} else {
$this->nameTestFiles[] = $path;
}
}
}
$this->fileCount++;
} elseif ($value != "." && $value != "..") {
//Dirs
if (!$this->isLink($path) && $this->recursion) {
$this->recursiveScan($path, $results);
}
if (!is_readable($path)) {
$results[] = $path;
$this->unreadable[] = $path;
} elseif ($this->isLink($path)) {
$results[] = $path;
$this->symLinks[] = $path;
} else {
$invalid_test = strlen($path) > 244 || trim($path) == '' || preg_match('/[^\x20-\x7f]/', $path);
if ($invalid_test) {
if (!SnapUtil::isPHP7Plus() && SnapOS::isWindows()) {
$this->nameTestDirs[] = utf8_decode($path);
} else {
$this->nameTestDirs[] = $path;
}
}
}
$this->dirCount++;
}
}
}
return $this;
}
/**
* Separation logic for supporting how different operating systems work
*
* @param string $target A valid file path
*
* @return bool Is the target a sym link
*/
private function isLink($target)
{
//Currently Windows does not support sym-link detection
if (SnapOS::isWindows()) {
return false;
} elseif (is_link($target)) {
return true;
}
return false;
}
}