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backup.php
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backup.php
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<?php
if (!defined('SYNC_ZIP_EXECUTABLE')) define('SYNC_ZIP_EXECUTABLE', "/usr/bin/zip,/bin/zip,/usr/local/bin/zip,/usr/sfw/bin/zip,/usr/xdg4/bin/zip,/opt/bin/zip");
if (!defined('SYNC_ZIP_NOCOMPRESS')) define('SYNC_ZIP_NOCOMPRESS', '.jpg,.jpeg,.png,.gif,.zip,.gz,.bz2,.xz,.rar,.mp3,.mp4,.mpeg,.avi,.mov');
if (!defined('SYNC_BINZIP_OPTS')) {
$zip_nocompress = array_map('trim', explode(',', SYNC_ZIP_NOCOMPRESS));
$zip_binzip_opts = '';
foreach ($zip_nocompress as $ext) {
if (empty($zip_binzip_opts)) {
$zip_binzip_opts = "-n $ext:".strtoupper($ext);
} else {
$zip_binzip_opts .= ':'.$ext.':'.strtoupper($ext);
}
}
define('SYNC_BINZIP_OPTS', $zip_binzip_opts);
}
class SYNC_Backup{
public $binzip = 0;
public $debug = false;
public $use_zip_object = 'SYNC_ZipArchive';
public function __construct(){
if (@file_exists('/proc/user_beancounters') && @file_exists('/proc/meminfo') && @is_readable('/proc/meminfo')) {
$meminfo = @file_get_contents('/proc/meminfo', false, null, -1, 200);
if (is_string($meminfo) && preg_match('/MemTotal:\s+(\d+) kB/', $meminfo, $matches)) {
$memory_mb = $matches[1]/1024;
# If the report is of a large amount, then we're probably getting the total memory on the hypervisor (this has been observed), and don't really know the VPS's memory
$vz_log = "OpenVZ; reported memory: ".round($memory_mb, 1)." MB";
if ($memory_mb < 1024 || $memory_mb > 8192) {
$openvz_lowmem = true;
$vz_log .= " (will not use BinZip)";
}
}
}
if (empty($openvz_lowmem)) {
$binzip = $this->find_working_bin_zip();
if (is_string($binzip)) {
$this->binzip = $binzip;
$this->use_zip_object = 'SYNC_BinZip';
}
}
}
public function find_working_bin_zip($logit = true, $cacheit = true) {
if ($this->detect_safe_mode()) return false;
// The hosting provider may have explicitly disabled the popen or proc_open functions
if (!function_exists('popen') || !function_exists('proc_open') || !function_exists('escapeshellarg')) {
return false;
}
$existing = null;
# Theoretically, we could have moved machines, due to a migration
if (null !== $existing && (!is_string($existing) || @is_executable($existing))) return $existing;
$backup_dir = $this->backups_dir_location();
foreach (explode(',', SYNC_ZIP_EXECUTABLE) as $potzip) {
if (!@is_executable($potzip)) continue;
// if ($logit) $this->log("Testing: $potzip");
# Test it, see if it is compatible with Info-ZIP
# If you have another kind of zip, then feel free to tell me about it
@mkdir($backup_dir.'/binziptest/subdir1/subdir2', 0777, true);
if (!file_exists($backup_dir.'/binziptest/subdir1/subdir2')) return false;
file_put_contents($backup_dir.'/binziptest/subdir1/subdir2/test.html', '<html><body><h1>Test content</h1></body></html>');
@unlink($backup_dir.'/binziptest/test.zip');
if (is_file($backup_dir.'/binziptest/subdir1/subdir2/test.html')) {
$exec = "cd ".escapeshellarg($backup_dir)."; $potzip";
if (defined('SYNC_BINZIP_OPTS') && SYNC_BINZIP_OPTS) $exec .= ' '.SYNC_BINZIP_OPTS;
$exec .= " -v -u -r binziptest/test.zip binziptest/subdir1";
$all_ok=true;
$handle = popen($exec, "r");
if ($handle) {
while (!feof($handle)) {
$w = fgets($handle);
// if ($w && $logit) $this->log("Output: ".trim($w));
}
$ret = pclose($handle);
if ($ret !=0) {
// if ($logit) $this->log("Binary zip: error (code: $ret)");
$all_ok = false;
}
} else {
// if ($logit) $this->log("Error: popen failed");
$all_ok = false;
}
# Now test -@
if (true == $all_ok) {
file_put_contents($backup_dir.'/binziptest/subdir1/subdir2/test2.html', '<html><body><a href="https://infinitewp.com">InfiniteWP is a really great backup and restoration plugin for WordPress.</a></body></html>');
$exec = $potzip;
if (defined('SYNC_BINZIP_OPTS') && SYNC_BINZIP_OPTS) $exec .= ' '.SYNC_BINZIP_OPTS;
$exec .= " -v -@ binziptest/test.zip";
$all_ok=true;
$descriptorspec = array(
0 => array('pipe', 'r'),
1 => array('pipe', 'w'),
2 => array('pipe', 'w')
);
$handle = proc_open($exec, $descriptorspec, $pipes, $backup_dir);
if (is_resource($handle)) {
if (!fwrite($pipes[0], "binziptest/subdir1/subdir2/test2.html\n")) {
@fclose($pipes[0]);
@fclose($pipes[1]);
@fclose($pipes[2]);
$all_ok = false;
} else {
fclose($pipes[0]);
while (!feof($pipes[1])) {
$w = fgets($pipes[1]);
// if ($w && $logit) $this->log("Output: ".trim($w));
}
fclose($pipes[1]);
while (!feof($pipes[2])) {
$last_error = fgets($pipes[2]);
// if (!empty($last_error) && $logit) $this->log("Stderr output: ".trim($w));
}
fclose($pipes[2]);
$ret = proc_close($handle);
if ($ret !=0) {
// if ($logit) $this->log("Binary zip: error (code: $ret)");
$all_ok = false;
}
}
} else {
// if ($logit) $this->log("Error: proc_open failed");
$all_ok = false;
}
}
// Do we now actually have a working zip? Need to test the created object using PclZip
// If it passes, then remove dirs and then return $potzip;
$found_first = false;
$found_second = false;
if ($all_ok && file_exists($backup_dir.'/binziptest/test.zip')) {
if (function_exists('gzopen')) {
if(!class_exists('PclZip')) {
if (file_exists(ABSPATH.'/wp-admin/includes/class-pclzip.php')) {
include_once(ABSPATH.'/wp-admin/includes/class-pclzip.php');
}else{
include_once('class-pclzip.php');
}
}
$zip = new PclZip($backup_dir.'/binziptest/test.zip');
$foundit = 0;
if (($list = $zip->listContent()) != 0) {
foreach ($list as $obj) {
if ($obj['filename'] && !empty($obj['stored_filename']) && 'binziptest/subdir1/subdir2/test.html' == $obj['stored_filename'] && $obj['size']==129) $found_first=true;
if ($obj['filename'] && !empty($obj['stored_filename']) && 'binziptest/subdir1/subdir2/test2.html' == $obj['stored_filename'] && $obj['size']==136) $found_second=true;
}
}
} else {
// PclZip will die() if gzopen is not found
// Obviously, this is a kludge - we assume it's working. We could, of course, just return false - but since we already know now that PclZip can't work, that only leaves ZipArchive
// $this->log("gzopen function not found; PclZip cannot be invoked; will assume that binary zip works if we have a non-zero file");
if (filesize($backup_dir.'/binziptest/test.zip') > 0) {
$found_first = true;
$found_second = true;
}
}
}
$this->remove_binzip_test_files($backup_dir);
if ($found_first && $found_second) {
// if ($logit) $this->log("Working binary zip found: $potzip");
// if ($cacheit) $this->jobdata_set('binzip', $potzip);
return $potzip;
}
}
$this->remove_binzip_test_files($backup_dir);
}
// if ($cacheit) $this->jobdata_set('binzip', false);
return false;
}
public function detect_safe_mode() {
return (@ini_get('safe_mode') && strtolower(@ini_get('safe_mode')) != "off") ? 1 : 0;
}
private function remove_binzip_test_files($backup_dir) {
@unlink($backup_dir.'/binziptest/subdir1/subdir2/test.html');
@unlink($backup_dir.'/binziptest/subdir1/subdir2/test2.html');
@rmdir($backup_dir.'/binziptest/subdir1/subdir2');
@rmdir($backup_dir.'/binziptest/subdir1');
@unlink($backup_dir.'/binziptest/test.zip');
@rmdir($backup_dir.'/binziptest');
}
public function backups_dir_location() {
return dirname(__FILE__);
}
public function str_lreplace($search, $replace, $subject) {
$pos = strrpos($subject, $search);
if($pos !== false) $subject = substr_replace($subject, $replace, $pos, strlen($search));
return $subject;
}
}
if (class_exists('ZipArchive')):
class SYNC_ZipArchive extends ZipArchive {
public $last_error = 'Unknown: ZipArchive does not return error messages';
}
endif;
class SYNC_PclZip {
protected $pclzip;
protected $path;
protected $addfiles;
protected $adddirs;
private $statindex;
private $include_mtime = false;
public $last_error;
public function __construct() {
$this->addfiles = array();
$this->adddirs = array();
// Put this in a non-backed-up, writeable location, to make sure that huge temporary files aren't created and then added to the backup - and that we have somewhere writable
global $backup_core;
if (!defined('PCLZIP_TEMPORARY_DIR')) define('PCLZIP_TEMPORARY_DIR', trailingslashit($backup_core->backups_dir_location()));
}
# Used to include mtime in statindex (by default, not done - to save memory; probably a bit paranoid)
public function ud_include_mtime() {
$this->include_mtime = true;
}
public function __get($name) {
if ($name == 'numFiles' || $name == 'numAll') {
if (empty($this->pclzip)) return false;
$statindex = $this->pclzip->listContent();
if (empty($statindex)) {
$this->statindex = array();
// We return a value that is == 0, but allowing a PclZip error to be detected (PclZip returns 0 in the case of an error).
if (0 === $statindex) $this->last_error = $this->pclzip->errorInfo(true);
return (0 === $statindex) ? false : 0;
}
if ($name == 'numFiles') {
$result = array();
foreach ($statindex as $i => $file) {
if (!isset($statindex[$i]['folder']) || 0 == $statindex[$i]['folder']) {
$result[] = $file;
}
unset($statindex[$i]);
}
$this->statindex=$result;
} else {
$this->statindex=$statindex;
}
return count($this->statindex);
}
return null;
}
public function statIndex($i) {
if (empty($this->statindex[$i])) return array('name' => null, 'size' => 0);
$v = array('name' => $this->statindex[$i]['filename'], 'size' => $this->statindex[$i]['size']);
if ($this->include_mtime) $v['mtime'] = $this->statindex[$i]['mtime'];
return $v;
}
public function open($path, $flags = 0) {
if(!class_exists('PclZip')){
if (file_exists(ABSPATH.'/wp-admin/includes/class-pclzip.php')) {
include_once(ABSPATH.'/wp-admin/includes/class-pclzip.php');
}else{
include_once('class-pclzip.php');
}
}
if(!class_exists('PclZip')) {
$this->last_error = "No PclZip class was found";
return false;
}
# Route around PHP bug (exact version with the problem not known)
$ziparchive_create_match = (version_compare(PHP_VERSION, '5.2.12', '>') && defined('ZIPARCHIVE::CREATE')) ? ZIPARCHIVE::CREATE : 1;
if ($flags == $ziparchive_create_match && file_exists($path)) @unlink($path);
$this->pclzip = new PclZip($path);
if (empty($this->pclzip)) {
$this->last_error = 'Could not get a PclZip object';
return false;
}
# Make the empty directory we need to implement addEmptyDir()
global $backup_core;
$backup_dir = $backup_core->backups_dir_location();
if (!is_dir($backup_dir.'/emptydir') && !mkdir($backup_dir.'/emptydir')) {
$this->last_error = "Could not create empty directory ($backup_dir/emptydir)";
return false;
}
$this->path = $path;
return true;
}
# Do the actual write-out - it is assumed that close() is where this is done. Needs to return true/false
public function close() {
if (empty($this->pclzip)) {
$this->last_error = 'Zip file was not opened';
return false;
}
global $backup_core;
$backup_dir = $backup_core->backups_dir_location();
$activity = false;
# Add the empty directories
foreach ($this->adddirs as $dir) {
if (false == $this->pclzip->add($backup_dir.'/emptydir', PCLZIP_OPT_REMOVE_PATH, $backup_dir.'/emptydir', PCLZIP_OPT_ADD_PATH, $dir)) {
$this->last_error = $this->pclzip->errorInfo(true);
return false;
}
$activity = true;
}
foreach ($this->addfiles as $rdirname => $adirnames) {
foreach ($adirnames as $adirname => $files) {
if (false == $this->pclzip->add($files, PCLZIP_OPT_REMOVE_PATH, $rdirname, PCLZIP_OPT_ADD_PATH, $adirname)) {
$this->last_error = $this->pclzip->errorInfo(true);
return false;
}
$activity = true;
}
unset($this->addfiles[$rdirname]);
}
$this->pclzip = false;
$this->addfiles = array();
$this->adddirs = array();
clearstatcache();
if ($activity && filesize($this->path) < 50) {
$this->last_error = "Write failed - unknown cause (check your file permissions)";
return false;
}
return true;
}
# Note: basename($add_as) is irrelevant; that is, it is actually basename($file) that will be used. But these are always identical in our usage.
public function addFile($file, $add_as) {
# Add the files. PclZip appears to do the whole (copy zip to temporary file, add file, move file) cycle for each file - so batch them as much as possible. We have to batch by dirname(). On a test with 1000 files of 25KB each in the same directory, this reduced the time needed on that directory from 120s to 15s (or 5s with primed caches).
$rdirname = dirname($file);
$adirname = dirname($add_as);
$this->addfiles[$rdirname][$adirname][] = $file;
}
# PclZip doesn't have a direct way to do this
public function addEmptyDir($dir) {
$this->adddirs[] = $dir;
}
public function extract($path_to_extract, $path) {
return $this->pclzip->extract(PCLZIP_OPT_PATH, $path_to_extract, PCLZIP_OPT_BY_NAME, $path);
}
}
class SYNC_BinZip extends SYNC_PclZip {
private $binzip;
public function __construct() {
global $backup_core;
$this->binzip = $backup_core->binzip;
if (!is_string($this->binzip)) {
$this->last_error = "No binary zip was found";
return false;
}
return parent::__construct();
}
public function addFile($file, $add_as) {
global $backup_core;
# Get the directory that $add_as is relative to
$base = $backup_core->str_lreplace($add_as, '', $file);
if ($file == $base) {
// Shouldn't happen; but see: https://bugs.php.net/bug.php?id=62119
// $backup_core->log("File skipped due to unexpected name mismatch (locale: ".setlocale(LC_CTYPE, "0")."): file=$file add_as=$add_as", 'notice', false, true);
} else {
$rdirname = untrailingslashit($base);
# Note: $file equals $rdirname/$add_as
$this->addfiles[$rdirname][] = $add_as;
}
}
# The standard zip binary cannot list; so we use PclZip for that
# Do the actual write-out - it is assumed that close() is where this is done. Needs to return true/false
public function close() {
if (empty($this->pclzip)) {
$this->last_error = 'Zip file was not opened';
return false;
}
global $backup_core, $backup_core;
$backup_dir = $backup_core->backups_dir_location();
$activity = false;
# BinZip does not like zero-sized zip files
if (file_exists($this->path) && 0 == filesize($this->path)) @unlink($this->path);
$descriptorspec = array(
0 => array('pipe', 'r'),
1 => array('pipe', 'w'),
2 => array('pipe', 'w')
);
$exec = $this->binzip;
if (defined('SYNC_BINZIP_OPTS') && SYNC_BINZIP_OPTS) $exec .= ' '.SYNC_BINZIP_OPTS;
$exec .= " -v -@ ".escapeshellarg($this->path);
$last_recorded_alive = time();
$orig_size = file_exists($this->path) ? filesize($this->path) : 0;
$last_size = $orig_size;
clearstatcache();
$added_dirs_yet = false;
# If there are no files to add, but there are empty directories, then we need to make sure the directories actually get added
if (0 == count($this->addfiles) && 0 < count($this->adddirs)) {
$dir = realpath($backup_core->make_zipfile_source);
$this->addfiles[$dir] = '././.';
}
// Loop over each destination directory name
foreach ($this->addfiles as $rdirname => $files) {
$process = proc_open($exec, $descriptorspec, $pipes, $rdirname);
if (!is_resource($process)) {
$backup_core->log('BinZip error: proc_open failed');
$this->last_error = 'BinZip error: proc_open failed';
return false;
}
if (!$added_dirs_yet) {
# Add the directories - (in fact, with binzip, non-empty directories automatically have their entries added; but it doesn't hurt to add them explicitly)
foreach ($this->adddirs as $dir) {
fwrite($pipes[0], $dir."/\n");
}
$added_dirs_yet=true;
}
$read = array($pipes[1], $pipes[2]);
$except = null;
if (!is_array($files) || 0 == count($files)) {
fclose($pipes[0]);
$write = array();
} else {
$write = array($pipes[0]);
}
while ((!feof($pipes[1]) || !feof($pipes[2]) || (is_array($files) && count($files)>0)) && false !== ($changes = @stream_select($read, $write, $except, 0, 200000))) {
if (is_array($write) && in_array($pipes[0], $write) && is_array($files) && count($files)>0) {
$file = array_pop($files);
// Send the list of files on stdin
fwrite($pipes[0], $file."\n");
if (0 == count($files)) fclose($pipes[0]);
}
if (is_array($read) && in_array($pipes[1], $read)) {
$w = fgets($pipes[1]);
// Logging all this really slows things down; use debug to mitigate
// if ($w && $backup_core->debug) $backup_core->log("Output from zip: ".trim($w), 'debug');
if (time() > $last_recorded_alive + 5) {
$backup_core->record_still_alive();
$last_recorded_alive = time();
}
if (file_exists($this->path)) {
$new_size = @filesize($this->path);
clearstatcache();
# Log when 20% bigger or at least every 50MB
if ($new_size > $last_size*1.2 || $new_size > $last_size + 52428800) {
$backup_core->log(basename($this->path).sprintf(": size is now: %.2f MB", round($new_size/1048576,1)));
$last_size = $new_size;
}
}
}
if (is_array($read) && in_array($pipes[2], $read)) {
$last_error = fgets($pipes[2]);
if (!empty($last_error)) $this->last_error = rtrim($last_error);
}
// Re-set
$read = array($pipes[1], $pipes[2]);
$write = (is_array($files) && count($files) >0) ? array($pipes[0]) : array();
$except = null;
}
fclose($pipes[1]);
fclose($pipes[2]);
$ret = proc_close($process);
if ($ret != 0 && $ret != 12) {
if ($ret < 128) {
// $backup_core->log("Binary zip: error (code: $ret - look it up in the Diagnostics section of the zip manual at http://www.info-zip.org/mans/zip.html for interpretation... and also check that your hosting account quota is not full)");
} else {
// $backup_core->log("Binary zip: error (code: $ret - a code above 127 normally means that the zip process was deliberately killed ... and also check that your hosting account quota is not full)");
}
// if (!empty($w) && !$backup_core->debug) $backup_core->log("Last output from zip: ".trim($w), 'debug');
return false;
}
unset($this->addfiles[$rdirname]);
}
return true;
}
}