CUpdateSystem::CheckUpdatability

static function CheckUpdatability($updates_dir, &$strError)
{
	$strError_tmp = "";

	$updates_dir_full = $_SERVER["DOCUMENT_ROOT"]."/bitrix/updates/".$updates_dir;
	if (!file_exists($updates_dir_full) || !is_dir($updates_dir_full))
	{
		$strError_tmp .= "[UCU01] ".str_replace("#FILE#", $updates_dir_full, GetMessage("SUPP_CU_NO_TMP_CAT")).".
";
	}

	if ($strError_tmp == '')
	{
		if (!is_readable($updates_dir_full))
		{
			$strError_tmp .= "[UCU02] ".str_replace("#FILE#", $updates_dir_full, GetMessage("SUPP_CU_RD_TMP_CAT")).".
";
		}
	}

	if ($handle = @opendir($updates_dir_full))
	{
		while (($file = readdir($handle)) !== false)
		{
			if ($file == "." || $file == "..") continue;

			if (is_dir($updates_dir_full."/".$file))
			{
				CUpdateSystem::CheckUpdatability($updates_dir."/".$file, $strError_tmp);
			}
			elseif (is_file($updates_dir_full."/".$file))
			{
				$strRealPath = $_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/".substr($updates_dir."/".$file, strpos($updates_dir."/".$file, "/"));
				if (file_exists($strRealPath))
				{
					if (!is_writeable($strRealPath))
					{
						$strError_tmp .= "[UCU03] ".str_replace("#FILE#", $strRealPath, GetMessage("SUPP_CU_MAIN_ERR_FILE")).".
";
					}
				}
				else
				{
					$p = CUpdateSystem::bxstrrpos($strRealPath, "/");
					$strRealPath = substr($strRealPath, 0, $p);

					if (strlen($strRealPath)>1)
						$strRealPath = rtrim($strRealPath, "/");

					$p = CUpdateSystem::bxstrrpos($strRealPath, "/");
					while ($p > 0)
					{
						if (file_exists($strRealPath) && is_dir($strRealPath))
						{
							if (!is_writable($strRealPath))
								$strError_tmp .= "[UCU04] ".str_replace("#FILE#", $strRealPath, GetMessage("SUPP_CU_MAIN_ERR_CAT")).".
";

							break;
						}
						$strRealPath = substr($strRealPath, 0, $p);
						$p = CUpdateSystem::bxstrrpos($strRealPath, "/");
					}
				}
			}
		}
		@closedir($handle);
	}

	if ($strError_tmp <> '')
	{
		CUpdateSystem::AddMessage2Log($strError_tmp, "CUCU");
		$strError .= $strError_tmp;
		return false;
	}
	else
		return true;
}