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<?php
if ( ! defined( 'DUPLICATOR_VERSION' ) ) exit; // Exit if accessed directly
class DUP_Util {
/**
* PHP_SAPI for fcgi requires a data flush of at least 256
* bytes every 40 seconds or else it forces a script hault
*/
static public function FcgiFlush() {
echo(str_repeat(' ', 300));
@flush();
}
/**
* Language slug
*/
static public function _e($text)
{
_e($text, DUPLICATOR_LANG_SLUG);
}
static public function __($text)
{
return __($text, DUPLICATOR_LANG_SLUG);
}
/**
* returns the snapshot url
*/
static public function SSDirURL() {
return get_site_url(null, '', is_ssl() ? 'https' : 'http') . '/' . DUPLICATOR_SSDIR_NAME . '/';
}
/**
* Returns the last N lines of a file
* Equivelent to tail command
*/
static public function TailFile($filepath, $lines = 2) {
// Open file
$f = @fopen($filepath, "rb");
if ($f === false) return false;
// Sets buffer size
$buffer = 256;
// Jump to last character
fseek($f, -1, SEEK_END);
// Read it and adjust line number if necessary
// (Otherwise the result would be wrong if file doesn't end with a blank line)
if (fread($f, 1) != "\n") $lines -= 1;
// Start reading
$output = '';
$chunk = '';
// While we would like more
while (ftell($f) > 0 && $lines >= 0) {
// Figure out how far back we should jump
$seek = min(ftell($f), $buffer);
// Do the jump (backwards, relative to where we are)
fseek($f, -$seek, SEEK_CUR);
// Read a chunk and prepend it to our output
$output = ($chunk = fread($f, $seek)) . $output;
// Jump back to where we started reading
fseek($f, -mb_strlen($chunk, '8bit'), SEEK_CUR);
// Decrease our line counter
$lines -= substr_count($chunk, "\n");
}
// While we have too many lines
// (Because of buffer size we might have read too many)
while ($lines++ < 0) {
// Find first newline and remove all text before that
$output = substr($output, strpos($output, "\n") + 1);
}
fclose($f);
return trim($output);
}
/**
* Runs the APC cache to pre-cache the php files
* returns true if all files where cached
*/
static public function RunAPC() {
if(function_exists('apc_compile_file')){
$file01 = @apc_compile_file(DUPLICATOR_PLUGIN_PATH . "duplicator.php");
return ($file01);
} else {
return false;
}
}
/**
* Display human readable byte sizes
* @param string $size The size in bytes
*/
static public function ByteSize($size) {
try {
$units = array('B', 'KB', 'MB', 'GB', 'TB');
for ($i = 0; $size >= 1024 && $i < 4; $i++)
$size /= 1024;
return round($size, 2) . $units[$i];
} catch (Exception $e) {
return "n/a";
}
}
/**
* Makes path safe for any OS
* Paths should ALWAYS READ be "/"
* uni: /home/path/file.xt
* win: D:/home/path/file.txt
* @param string $path The path to make safe
*/
static public function SafePath($path) {
return str_replace("\\", "/", $path);
}
/**
* Get current microtime as a float. Can be used for simple profiling.
*/
static public function GetMicrotime() {
return microtime(true);
}
/**
* Append the value to the string if it doesn't already exist
*/
static public function StringAppend($string, $value ) {
return $string . (substr($string, -1) == $value ? '' : $value);
}
/**
* Return a string with the elapsed time.
* Order of $end and $start can be switched.
*/
static public function ElapsedTime($end, $start) {
return sprintf("%.2f sec.", abs($end - $start));
}
/**
* Get the MySQL system variables
* @param conn $dbh Database connection handle
* @return string the server variable to query for
*/
static public function MysqlVariableValue($variable) {
global $wpdb;
$row = $wpdb->get_row("SHOW VARIABLES LIKE '{$variable}'", ARRAY_N);
return isset($row[1]) ? $row[1] : null;
}
/**
* List all of the files of a path
* @path path to a system directory
* @return array of all files in that path
*/
static public function ListFiles($path = '.') {
$files = array();
//GLOB_BRACE is not an option on some systems
//{,.}* allows for hidden files to be shown
if (defined("GLOB_BRACE")) {
$files = glob("{$path}/{,.}*", GLOB_NOSORT | GLOB_BRACE);
} else {
foreach (new DirectoryIterator($path) as $file) {
$files[] = DUP_Util::SafePath($file->getPathname());
}
}
return $files;
}
/**
* List all of the directories of a path
* @path path to a system directory
* @return array of all directories in that path
*/
static public function ListDirs($path = '.') {
$dirs = array();
foreach (new DirectoryIterator($path) as $file) {
if ($file->isDir() && !$file->isDot()) {
$dirs[] = DUP_Util::SafePath($file->getPathname());
}
}
return $dirs;
}
/**
* Does the directory have content
*/
static public function IsDirectoryEmpty($dir) {
if (!is_readable($dir)) return NULL;
return (count(scandir($dir)) == 2);
}
/**
* Size of the directory recuresivly in bytes
*/
static public function GetDirectorySize($dir) {
if(!file_exists($dir))
return 0;
if(is_file($dir))
return filesize($dir);
$size = 0;
$list = glob($dir."/*");
if (! empty($list)) {
foreach($list as $file)
$size += self::GetDirectorySize($file);
}
return $size;
}
public static function IsShellExecAvailable() {
if (array_intersect(array('shell_exec', 'escapeshellarg', 'escapeshellcmd', 'extension_loaded'), array_map('trim', explode(',', @ini_get('disable_functions')))))
return false;
//Suhosin: http://www.hardened-php.net/suhosin/
//Will cause PHP to silently fail.
if (extension_loaded('suhosin'))
return false;
// Can we issue a simple echo command?
if (!@shell_exec('echo duplicator'))
return false;
return true;
}
public static function IsOSWindows() {
if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
return true;
}
return false;
}
public static function CheckPermissions($permission = 'read') {
$capability = $permission;
$capability = apply_filters('wpfront_user_role_editor_duplicator_translate_capability', $capability);
if(!current_user_can($capability)) {
wp_die(__('You do not have sufficient permissions to access this page.', 'wpduplicator'));
return;
}
}
/**
* Creates the snapshot directory if it doesn't already exisit
*/
public static function GetCurrentUser() {
$unreadable = 'Undetectable';
if (function_exists('get_current_user') && is_callable('get_current_user')) {
$user = get_current_user();
return strlen($user) ? $user : $unreadable;
}
return $unreadable;
}
/**
* Gets the owner of the PHP process
*/
public static function GetProcessOwner() {
$unreadable = 'Undetectable';
$user = '';
try {
if (function_exists('exec')) {
$user = exec('whoami');
}
if (! strlen($user) && function_exists('posix_getpwuid') && function_exists('posix_geteuid')) {
$user = posix_getpwuid(posix_geteuid());
$user = $user['name'];
}
return strlen($user) ? $user : $unreadable;
} catch (Exception $ex) {
return $unreadable;
}
}
/**
* Creates the snapshot directory if it doesn't already exisit
*/
static public function InitSnapshotDirectory() {
$path_wproot = DUP_Util::SafePath(DUPLICATOR_WPROOTPATH);
$path_ssdir = DUP_Util::SafePath(DUPLICATOR_SSDIR_PATH);
$path_plugin = DUP_Util::SafePath(DUPLICATOR_PLUGIN_PATH);
//--------------------------------
//CHMOD DIRECTORY ACCESS
//wordpress root directory
@chmod($path_wproot, 0755);
//snapshot directory
@mkdir($path_ssdir, 0755);
@chmod($path_ssdir, 0755);
//snapshot tmp directory
$path_ssdir_tmp = $path_ssdir . '/tmp';
@mkdir($path_ssdir_tmp, 0755);
@chmod($path_ssdir_tmp, 0755);
//plugins dir/files
@chmod($path_plugin . 'files', 0755);
//--------------------------------
//FILE CREATION
//SSDIR: Create Index File
$ssfile = @fopen($path_ssdir . '/index.php', 'w');
@fwrite($ssfile, '<?php error_reporting(0); if (stristr(php_sapi_name(), "fcgi")) { $url = "http://" . $_SERVER["HTTP_HOST"]; header("Location: {$url}/404.html");} else { header("HTTP/1.1 404 Not Found", true, 404);} exit(); ?>');
@fclose($ssfile);
//SSDIR: Create token file in snapshot
$tokenfile = @fopen($path_ssdir . '/dtoken.php', 'w');
@fwrite($tokenfile, '<?php error_reporting(0); if (stristr(php_sapi_name(), "fcgi")) { $url = "http://" . $_SERVER["HTTP_HOST"]; header("Location: {$url}/404.html");} else { header("HTTP/1.1 404 Not Found", true, 404);} exit(); ?>');
@fclose($tokenfile);
//SSDIR: Create .htaccess
$storage_htaccess_off = DUP_Settings::Get('storage_htaccess_off');
if ($storage_htaccess_off) {
@unlink($path_ssdir . '/.htaccess');
} else {
$htfile = @fopen($path_ssdir . '/.htaccess', 'w');
$htoutput = "Options -Indexes" ;
@fwrite($htfile, $htoutput);
@fclose($htfile);
}
//SSDIR: Robots.txt file
$robotfile = @fopen($path_ssdir . '/robots.txt', 'w');
@fwrite($robotfile, "User-agent: * \nDisallow: /" . DUPLICATOR_SSDIR_NAME . '/');
@fclose($robotfile);
//PLUG DIR: Create token file in plugin
$tokenfile2 = @fopen($path_plugin . 'installer/dtoken.php', 'w');
@fwrite($tokenfile2, '<?php @error_reporting(0); @require_once("../../../../wp-admin/admin.php"); global $wp_query; $wp_query->set_404(); header("HTTP/1.1 404 Not Found", true, 404); header("Status: 404 Not Found"); @include(get_template_directory () . "/404.php"); ?>');
@fclose($tokenfile2);
}
}
?>
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