<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Filesystem;
use Symfony\Component\Filesystem\Exception\FileNotFoundException;
use Symfony\Component\Filesystem\Exception\InvalidArgumentException;
use Symfony\Component\Filesystem\Exception\IOException;
/**
* Provides basic utility to manipulate the file system.
*
* @author Fabien Potencier <[email protected]>
*/
class Filesystem
{
private static $lastError;
/**
* Copies a file.
*
* If the target file is older than the origin file, it's always overwritten.
* If the target file is newer, it is overwritten only when the
* $overwriteNewerFiles option is set to true.
*
* @throws FileNotFoundException When originFile doesn't exist
* @throws IOException When copy fails
*/
public function copy(string $originFile, string $targetFile, bool $overwriteNewerFiles = false)
{
$originIsLocal = stream_is_local($originFile) || 0 === stripos($originFile, 'file://');
if ($originIsLocal && !is_file($originFile)) {
throw new FileNotFoundException(sprintf('Failed to copy "%s" because file does not exist.', $originFile), 0, null, $originFile);
}
$this->mkdir(\dirname($targetFile));
$doCopy = true;
if (!$overwriteNewerFiles && null === parse_url($originFile, \PHP_URL_HOST) && is_file($targetFile)) {
$doCopy = filemtime($originFile) > filemtime($targetFile);
}
if ($doCopy) {
// https://bugs.php.net/64634
if (!$source = self::box('fopen', $originFile, 'r')) {
throw new IOException(sprintf('Failed to copy "%s" to "%s" because source file could not be opened for reading: ', $originFile, $targetFile).self::$lastError, 0, null, $originFile);
}
// Stream context created to allow files overwrite when using FTP stream wrapper - disabled by default
if (!$target = self::box('fopen', $targetFile, 'w', false, stream_context_create(['ftp' => ['overwrite' => true]]))) {
throw new IOException(sprintf('Failed to copy "%s" to "%s" because target file could not be opened for writing: ', $originFile, $targetFile).self::$lastError, 0, null, $originFile);
}
$bytesCopied = stream_copy_to_stream($source, $target);
fclose($source);
fclose($target);
unset($source, $target);
if (!is_file($targetFile)) {
throw new IOException(sprintf('Failed to copy "%s" to "%s".', $originFile, $targetFile), 0, null, $originFile);
}
if ($originIsLocal) {
// Like `cp`, preserve executable permission bits
self::box('chmod', $targetFile, fileperms($targetFile) | (fileperms($originFile) & 0111));
if ($bytesCopied !== $bytesOrigin = filesize($originFile)) {
throw new IOException(sprintf('Failed to copy the whole content of "%s" to "%s" (%g of %g bytes copied).', $originFile, $targetFile, $bytesCopied, $bytesOrigin), 0, null, $originFile);
}
}
}
}
/**
* Creates a directory recursively.
*
* @param string|iterable $dirs The directory path
*
* @throws IOException On any directory creation failure
*/
public function mkdir($dirs, int $mode = 0777)
{
foreach ($this->toIterable($dirs) as $dir) {
if (is_dir($dir)) {
continue;
}
if (!self::box('mkdir', $dir, $mode, true) && !is_dir($dir)) {
throw new IOException(sprintf('Failed to create "%s": ', $dir).self::$lastError, 0, null, $dir);
}
}
}
/**
* Checks the existence of files or directories.
*
* @param string|iterable $files A filename, an array of files, or a \Traversable instance to check
*
* @return bool true if the file exists, false otherwise
*/
public function exists($files)
{
$maxPathLength = \PHP_MAXPATHLEN - 2;
foreach ($this->toIterable($files) as $file) {
if (\strlen($file) > $maxPathLength) {
throw new IOException(sprintf('Could not check if file exist because path length exceeds %d characters.', $maxPathLength), 0, null, $file);
}
if (!file_exists($file)) {
return false;
}
}
return true;
}
/**
* Sets access and modification time of file.
*
* @param string|iterable $files A filename, an array of files, or a \Traversable instance to create
* @param int|null $time The touch time as a Unix timestamp, if not supplied the current system time is used
* @param int|null $atime The access time as a Unix timestamp, if not supplied the current system time is used
*
* @throws IOException When touch fails
*/
public function touch($files, int $time = null, int $atime = null)
{
foreach ($this->toIterable($files) as $file) {
if (!($time ? self::box('touch', $file, $time, $atime) : self::box('touch', $file))) {
throw new IOException(sprintf('Failed to touch "%s": ', $file).self::$lastError, 0, null, $file);
}
}
}
/**
* Removes files or directories.
*
* @param string|iterable $files A filename, an array of files, or a \Traversable instance to remove
*
* @throws IOException When removal fails
*/
public function remove($files)
{
if ($files instanceof \Traversable) {
$files = iterator_to_array($files, false);
} elseif (!\is_array($files)) {
$files = [$files];
}
self::doRemove($files, false);
}
private static function doRemove(array $files, bool $isRecursive): void
{
$files = array_reverse($files);
foreach ($files as $file) {
if (is_link($file)) {
// See https://bugs.php.net/52176
if (!(self::box('unlink', $file) || '\\' !== \DIRECTORY_SEPARATOR || self::box('rmdir', $file)) && file_exists($file)) {
throw new IOException(sprintf('Failed to remove symlink "%s": ', $file).self::$lastError);
}
} elseif (is_dir($file)) {
if (!$isRecursive) {
$tmpName = \dirname(realpath($file)).'/.'.strrev(strtr(base64_encode(random_bytes(2)), '/=', '-.'));
if (file_exists($tmpName)) {
try {
self::doRemove([$tmpName], true);
} catch (IOException $e) {
}
}
if (!file_exists($tmpName) && self::box('rename', $file, $tmpName)) {
$origFile = $file;
$file = $tmpName;
} else {
$origFile = null;
}
}
$files = new \FilesystemIterator($file, \FilesystemIterator::CURRENT_AS_PATHNAME | \FilesystemIterator::SKIP_DOTS);
self::doRemove(iterator_to_array($files, true), true);
if (!self::box('rmdir', $file) && file_exists($file) && !$isRecursive) {
$lastError = self::$lastError;
if (null !== $origFile && self::box('rename', $file, $origFile)) {
$file = $origFile;
}
throw new IOException(sprintf('Failed to remove directory "%s": ', $file).$lastError);
}
} elseif (!self::box('unlink', $file) && (false !== strpos(self::$lastError, 'Permission denied') || file_exists($file))) {
throw new IOException(sprintf('Failed to remove file "%s": ', $file).self::$lastError);
}
}
}
/**
* Change mode for an array of files or directories.
*
* @param string|iterable $files A filename, an array of files, or a \Traversable instance to change mode
* @param int $mode The new mode (octal)
* @param int $umask The mode mask (octal)
* @param bool $recursive Whether change the mod recursively or not
*
* @throws IOException When the change fails
*/
public function chmod($files, int $mode, int $umask = 0000, bool $recursive = false)
{
foreach ($this->toIterable($files) as $file) {
if ((\PHP_VERSION_ID < 80000 || \is_int($mode)) && !self::box('chmod', $file, $mode & ~$umask)) {
throw new IOException(sprintf('Failed to chmod file "%s": ', $file).self::$lastError, 0, null, $file);
}
if ($recursive && is_dir($file) && !is_link($file)) {
$this->chmod(new \FilesystemIterator($file), $mode, $umask, true);
}
}
}
/**
* Change the owner of an array of files or directories.
*
* @param string|iterable $files A filename, an array of files, or a \Traversable instance to change owner
* @param string|int $user A user name or number
* @param bool $recursive Whether change the owner recursively or not
*
* @throws IOException When the change fails
*/
public function chown($files, $user, bool $recursive = false)
{
foreach ($this->toIterable($files) as $file) {
if ($recursive && is_dir($file) && !is_link($file)) {
$this->chown(new \FilesystemIterator($file), $user, true);
}
if (is_link($file) && \function_exists('lchown')) {
if (!self::box('lchown', $file, $user)) {
throw new IOException(sprintf('Failed to chown file "%s": ', $file).self::$lastError, 0, null, $file);
}
} else {
if (!self::box('chown', $file, $user)) {
throw new IOException(sprintf('Failed to chown file "%s": ', $file).self::$lastError, 0, null, $file);
}
}
}
}
/**
* Change the group of an array of files or directories.
*
* @param string|iterable $files A filename, an array of files, or a \Traversable instance to change group
* @param string|int $group A group name or number
* @param bool $recursive Whether change the group recursively or not
*
* @throws IOException When the change fails
*/
public function chgrp($files, $group, bool $recursive = false)
{
foreach ($this->toIterable($files) as $file) {
if ($recursive && is_dir($file) && !is_link($file)) {
$this->chgrp(new \FilesystemIterator($file), $group, true);
}
if (is_link($file) && \function_exists('lchgrp')) {
if (!self::box('lchgrp', $file, $group)) {
throw new IOException(sprintf('Failed to chgrp file "%s": ', $file).self::$lastError, 0, null, $file);
}
} else {
if (!self::box('chgrp', $file, $group)) {
throw new IOException(sprintf('Failed to chgrp file "%s": ', $file).self::$lastError, 0, null, $file);
}
}
}
}
/**
* Renames a file or a directory.
*
* @throws IOException When target file or directory already exists
* @throws IOException When origin cannot be renamed
*/
public function rename(string $origin, string $target, bool $overwrite = false)
{
// we check that target does not exist
if (!$overwrite && $this->isReadable($target)) {
throw new IOException(sprintf('Cannot rename because the target "%s" already exists.', $target), 0, null, $target);
}
if (!self::box('rename', $origin, $target)) {
if (is_dir($origin)) {
// See https://bugs.php.net/54097 & https://php.net/rename#113943
$this->mirror($origin, $target, null, ['override' => $overwrite, 'delete' => $overwrite]);
$this->remove($origin);
return;
}
throw new IOException(sprintf('Cannot rename "%s" to "%s": ', $origin, $target).self::$lastError, 0, null, $target);
}
}
/**
* Tells whether a file exists and is readable.
*
* @throws IOException When windows path is longer than 258 characters
*/
private function isReadable(string $filename): bool
{
$maxPathLength = \PHP_MAXPATHLEN - 2;
if (\strlen($filename) > $maxPathLength) {
throw new IOException(sprintf('Could not check if file is readable because path length exceeds %d characters.', $maxPathLength), 0, null, $filename);
}
return is_readable($filename);
}
/**
* Creates a symbolic link or copy a directory.
*
* @throws IOException When symlink fails
*/
public function symlink(string $originDir, string $targetDir, bool $copyOnWindows = false)
{
if ('\\' === \DIRECTORY_SEPARATOR) {
$originDir = strtr($originDir, '/', '\\');
$targetDir = strtr($targetDir, '/', '\\');
if ($copyOnWindows) {
$this->mirror($originDir, $targetDir);
return;
}
}
$this->mkdir(\dirname($targetDir));
if (is_link($targetDir)) {
if (readlink($targetDir) === $originDir) {
return;
}
$this->remove($targetDir);
}
if (!self::box('symlink', $originDir, $targetDir)) {
$this->linkException($originDir, $targetDir, 'symbolic');
}
}
/**
* Creates a hard link, or several hard links to a file.
*
* @param string|string[] $targetFiles The target file(s)
*
* @throws FileNotFoundException When original file is missing or not a file
* @throws IOException When link fails, including if link already exists
*/
public function hardlink(string $originFile, $targetFiles)
{
if (!$this->exists($originFile)) {
throw new FileNotFoundException(null, 0, null, $originFile);
}
if (!is_file($originFile)) {
throw new FileNotFoundException(sprintf('Origin file "%s" is not a file.', $originFile));
}
foreach ($this->toIterable($targetFiles) as $targetFile) {
if (is_file($targetFile)) {
if (fileinode($originFile) === fileinode($targetFile)) {
continue;
}
$this->remove($targetFile);
}
if (!self::box('link', $originFile, $targetFile)) {
$this->linkException($originFile, $targetFile, 'hard');
}
}
}
/**
* @param string $linkType Name of the link type, typically 'symbolic' or 'hard'
*/
private function linkException(string $origin, string $target, string $linkType)
{
if (self::$lastError) {
if ('\\' === \DIRECTORY_SEPARATOR && false !== strpos(self::$lastError, 'error code(1314)')) {
throw new IOException(sprintf('Unable to create "%s" link due to error code 1314: \'A required privilege is not held by the client\'. Do you have the required Administrator-rights?', $linkType), 0, null, $target);
}
}
throw new IOException(sprintf('Failed to create "%s" link from "%s" to "%s": ', $linkType, $origin, $target).self::$lastError, 0, null, $target);
}
/**
* Resolves links in paths.
*
* With $canonicalize = false (default)
* - if $path does not exist or is not a link, returns null
* - if $path is a link, returns the next direct target of the link without considering the existence of the target
*
* With $canonicalize = true
* - if $path does not exist, returns null
* - if $path exists, returns its absolute fully resolved final version
*
* @return string|null
*/
public function readlink(string $path, bool $canonicalize = false)
{
if (!$canonicalize && !is_link($path)) {
return null;
}
if ($canonicalize) {
if (!$this->exists($path)) {
return null;
}
if ('\\' === \DIRECTORY_SEPARATOR && \PHP_VERSION_ID < 70410) {
$path = readlink($path);
}
return realpath($path);
}
if ('\\' === \DIRECTORY_SEPARATOR && \PHP_VERSION_ID < 70400) {
return realpath($path);
}
return readlink($path);
}
/**
* Given an existing path, convert it to a path relative to a given starting path.
*
* @return string Path of target relative to starting path
*/
public function makePathRelative(string $endPath, string $startPath)
{
if (!$this->isAbsolutePath($startPath)) {
throw new InvalidArgumentException(sprintf('The start path "%s" is not absolute.', $startPath));
}
if (!$this->isAbsolutePath($endPath)) {
throw new InvalidArgumentException(sprintf('The end path "%s" is not absolute.', $endPath));
}
// Normalize separators on Windows
if ('\\' === \DIRECTORY_SEPARATOR) {
$endPath = str_replace('\\', '/', $endPath);
$startPath = str_replace('\\', '/', $startPath);
}
$splitDriveLetter = function ($path) {
return (\strlen($path) > 2 && ':' === $path[1] && '/' === $path[2] && ctype_alpha($path[0]))
? [substr($path, 2), strtoupper($path[0])]
: [$path, null];
};
$splitPath = function ($path) {
$result = [];
foreach (explode('/', trim($path, '/')) as $segment) {
if ('..' === $segment) {
array_pop($result);
} elseif ('.' !== $segment && '' !== $segment) {
$result[] = $segment;
}
}
return $result;
};
[$endPath, $endDriveLetter] = $splitDriveLetter($endPath);
[$startPath, $startDriveLetter] = $splitDriveLetter($startPath);
$startPathArr = $splitPath($startPath);
$endPathArr = $splitPath($endPath);
if ($endDriveLetter && $startDriveLetter && $endDriveLetter != $startDriveLetter) {
// End path is on another drive, so no relative path exists
return $endDriveLetter.':/'.($endPathArr ? implode('/', $endPathArr).'/' : '');
}
// Find for which directory the common path stops
$index = 0;
while (isset($startPathArr[$index]) && isset($endPathArr[$index]) && $startPathArr[$index] === $endPathArr[$index]) {
++$index;
}
// Determine how deep the start path is relative to the common path (ie, "web/bundles" = 2 levels)
if (1 === \count($startPathArr) && '' === $startPathArr[0]) {
$depth = 0;
} else {
$depth = \count($startPathArr) - $index;
}
// Repeated "../" for each level need to reach the common path
$traverser = str_repeat('../', $depth);
$endPathRemainder = implode('/', \array_slice($endPathArr, $index));
// Construct $endPath from traversing to the common path, then to the remaining $endPath
$relativePath = $traverser.('' !== $endPathRemainder ? $endPathRemainder.'/' : '');
return '' === $relativePath ? './' : $relativePath;
}
/**
* Mirrors a directory to another.
*
* Copies files and directories from the origin directory into the target directory. By default:
*
* - existing files in the target directory will be overwritten, except if they are newer (see the `override` option)
* - files in the target directory that do not exist in the source directory will not be deleted (see the `delete` option)
*
* @param \Traversable|null $iterator Iterator that filters which files and directories to copy, if null a recursive iterator is created
* @param array $options An array of boolean options
* Valid options are:
* - $options['override'] If true, target files newer than origin files are overwritten (see copy(), defaults to false)
* - $options['copy_on_windows'] Whether to copy files instead of links on Windows (see symlink(), defaults to false)
* - $options['delete'] Whether to delete files that are not in the source directory (defaults to false)
*
* @throws IOException When file type is unknown
*/
public function mirror(string $originDir, string $targetDir, \Traversable $iterator = null, array $options = [])
{
$targetDir = rtrim($targetDir, '/\\');
$originDir = rtrim($originDir, '/\\');
$originDirLen = \strlen($originDir);
if (!$this->exists($originDir)) {
throw new IOException(sprintf('The origin directory specified "%s" was not found.', $originDir), 0, null, $originDir);
}
// Iterate in destination folder to remove obsolete entries
if ($this->exists($targetDir) && isset($options['delete']) && $options['delete']) {
$deleteIterator = $iterator;
if (null === $deleteIterator) {
$flags = \FilesystemIterator::SKIP_DOTS;
$deleteIterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($targetDir, $flags), \RecursiveIteratorIterator::CHILD_FIRST);
}
$targetDirLen = \strlen($targetDir);
foreach ($deleteIterator as $file) {
$origin = $originDir.substr($file->getPathname(), $targetDirLen);
if (!$this->exists($origin)) {
$this->remove($file);
}
}
}
$copyOnWindows = $options['copy_on_windows'] ?? false;
if (null === $iterator) {
$flags = $copyOnWindows ? \FilesystemIterator::SKIP_DOTS | \FilesystemIterator::FOLLOW_SYMLINKS : \FilesystemIterator::SKIP_DOTS;
$iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($originDir, $flags), \RecursiveIteratorIterator::SELF_FIRST);
}
$this->mkdir($targetDir);
$filesCreatedWhileMirroring = [];
foreach ($iterator as $file) {
if ($file->getPathname() === $targetDir || $file->getRealPath() === $targetDir || isset($filesCreatedWhileMirroring[$file->getRealPath()])) {
continue;
}
$target = $targetDir.substr($file->getPathname(), $originDirLen);
$filesCreatedWhileMirroring[$target] = true;
if (!$copyOnWindows && is_link($file)) {
$this->symlink($file->getLinkTarget(), $target);
} elseif (is_dir($file)) {
$this->mkdir($target);
} elseif (is_file($file)) {
$this->copy($file, $target, $options['override'] ?? false);
} else {
throw new IOException(sprintf('Unable to guess "%s" file type.', $file), 0, null, $file);
}
}
}
/**
* Returns whether the file path is an absolute path.
*
* @return bool
*/
public function isAbsolutePath(string $file)
{
return '' !== $file && (strspn($file, '/\\', 0, 1)
|| (\strlen($file) > 3 && ctype_alpha($file[0])
&& ':' === $file[1]
&& strspn($file, '/\\', 2, 1)
)
|| null !== parse_url($file, \PHP_URL_SCHEME)
);
}
/**
* Creates a temporary file with support for custom stream wrappers.
*
* @param string $prefix The prefix of the generated temporary filename
* Note: Windows uses only the first three characters of prefix
* @param string $suffix The suffix of the generated temporary filename
*
* @return string The new temporary filename (with path), or throw an exception on failure
*/
public function tempnam(string $dir, string $prefix/*, string $suffix = ''*/)
{
$suffix = \func_num_args() > 2 ? func_get_arg(2) : '';
[$scheme, $hierarchy] = $this->getSchemeAndHierarchy($dir);
// If no scheme or scheme is "file" or "gs" (Google Cloud) create temp file in local filesystem
if ((null === $scheme || 'file' === $scheme || 'gs' === $scheme) && '' === $suffix) {
// If tempnam failed or no scheme return the filename otherwise prepend the scheme
if ($tmpFile = self::box('tempnam', $hierarchy, $prefix)) {
if (null !== $scheme && 'gs' !== $scheme) {
return $scheme.'://'.$tmpFile;
}
return $tmpFile;
}
throw new IOException('A temporary file could not be created: '.self::$lastError);
}
// Loop until we create a valid temp file or have reached 10 attempts
for ($i = 0; $i < 10; ++$i) {
// Create a unique filename
$tmpFile = $dir.'/'.$prefix.uniqid(mt_rand(), true).$suffix;
// Use fopen instead of file_exists as some streams do not support stat
// Use mode 'x+' to atomically check existence and create to avoid a TOCTOU vulnerability
if (!$handle = self::box('fopen', $tmpFile, 'x+')) {
continue;
}
// Close the file if it was successfully opened
self::box('fclose', $handle);
return $tmpFile;
}
throw new IOException('A temporary file could not be created: '.self::$lastError);
}
/**
* Atomically dumps content into a file.
*
* @param string|resource $content The data to write into the file
*
* @throws IOException if the file cannot be written to
*/
public function dumpFile(string $filename, $content)
{
if (\is_array($content)) {
throw new \TypeError(sprintf('Argument 2 passed to "%s()" must be string or resource, array given.', __METHOD__));
}
$dir = \dirname($filename);
if (!is_dir($dir)) {
$this->mkdir($dir);
}
if (!is_writable($dir)) {
throw new IOException(sprintf('Unable to write to the "%s" directory.', $dir), 0, null, $dir);
}
// Will create a temp file with 0600 access rights
// when the filesystem supports chmod.
$tmpFile = $this->tempnam($dir, basename($filename));
try {
if (false === self::box('file_put_contents', $tmpFile, $content)) {
throw new IOException(sprintf('Failed to write file "%s": ', $filename).self::$lastError, 0, null, $filename);
}
self::box('chmod', $tmpFile, file_exists($filename) ? fileperms($filename) : 0666 & ~umask());
$this->rename($tmpFile, $filename, true);
} finally {
if (file_exists($tmpFile)) {
self::box('unlink', $tmpFile);
}
}
}
/**
* Appends content to an existing file.
*
* @param string|resource $content The content to append
*
* @throws IOException If the file is not writable
*/
public function appendToFile(string $filename, $content)
{
if (\is_array($content)) {
throw new \TypeError(sprintf('Argument 2 passed to "%s()" must be string or resource, array given.', __METHOD__));
}
$dir = \dirname($filename);
if (!is_dir($dir)) {
$this->mkdir($dir);
}
if (!is_writable($dir)) {
throw new IOException(sprintf('Unable to write to the "%s" directory.', $dir), 0, null, $dir);
}
if (false === self::box('file_put_contents', $filename, $content, \FILE_APPEND)) {
throw new IOException(sprintf('Failed to write file "%s": ', $filename).self::$lastError, 0, null, $filename);
}
}
private function toIterable($files): iterable
{
return \is_array($files) || $files instanceof \Traversable ? $files : [$files];
}
/**
* Gets a 2-tuple of scheme (may be null) and hierarchical part of a filename (e.g. file:///tmp -> [file, tmp]).
*/
private function getSchemeAndHierarchy(string $filename): array
{
$components = explode('://', $filename, 2);
return 2 === \count($components) ? [$components[0], $components[1]] : [null, $components[0]];
}
/**
* @param mixed ...$args
*
* @return mixed
*/
private static function box(callable $func, ...$args)
{
self::$lastError = null;
set_error_handler(__CLASS__.'::handleError');
try {
$result = $func(...$args);
restore_error_handler();
return $result;
} catch (\Throwable $e) {
}
restore_error_handler();
throw $e;
}
/**
* @internal
*/
public static function handleError($type, $msg)
{
self::$lastError = $msg;
}
}