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<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * 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 <fabien@symfony.com> */ 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. * * @return void * * @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. * * @return void * * @throws IOException On any directory creation failure */ public function mkdir(string|iterable $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. */ public function exists(string|iterable $files): bool { $maxPathLength = \PHP_MAXPATHLEN - 2; foreach ($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 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 * * @return void * * @throws IOException When touch fails */ public function touch(string|iterable $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. * * @return void * * @throws IOException When removal fails */ public function remove(string|iterable $files) { if ($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) { } } if (!file_exists($tmpName) && self::box('rename', $file, $tmpName)) { $origFile = $file; $file = $tmpName; } else { $origFile = null; } } $filesystemIterator = new \FilesystemIterator($file, \FilesystemIterator::CURRENT_AS_PATHNAME | \FilesystemIterator::SKIP_DOTS); self::doRemove(iterator_to_array($filesystemIterator, 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', $file) && (str_contains(self::$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 int $mode The new mode (octal) * @param int $umask The mode mask (octal) * @param bool $recursive Whether change the mod recursively or not * * @return void * * @throws IOException When the change fails */ public function chmod(string|iterable $files, int $mode, int $umask = 0000, bool $recursive = false) { foreach ($this->toIterable($files) as $file) { if (!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|int $user A user name or number * @param bool $recursive Whether change the owner recursively or not * * @return void * * @throws IOException When the change fails */ public function chown(string|iterable $files, string|int $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|int $group A group name or number * @param bool $recursive Whether change the group recursively or not * * @return void * * @throws IOException When the change fails */ public function chgrp(string|iterable $files, string|int $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. * * @return void * * @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. * * @return void * * @throws IOException When symlink fails */ public function symlink(string $originDir, string $targetDir, bool $copyOnWindows = false) { self::assertFunctionExists('symlink'); 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) * * @return void * * @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, string|iterable $targetFiles) { self::assertFunctionExists('link'); if (!$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 $linkType): never { if (self::$lastError) { if ('\\' === \DIRECTORY_SEPARATOR && str_contains(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 */ public function readlink(string $path, bool $canonicalize = false): ?string { if (!$canonicalize && !is_link($path)) { return null; } if ($canonicalize) { if (!$this->exists($path)) { return null; } return realpath($path); } return readlink($path); } /** * Given an existing path, convert it to a path relative to a given starting path. */ public function makePathRelative(string $endPath, string $startPath): string { if (!$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); } $splitDriveLetter = fn ($path) => (\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) * * @return void * * @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. */ public function isAbsolutePath(string $file): bool { 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 $suffix = ''): string { [$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 * * @return void * * @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_link($filename) && $linkTarget = $this->readlink($filename)) { $this->dumpFile(Path::makeAbsolute($linkTarget, $dir), $content); return; } if (!is_dir($dir)) { $this->mkdir($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 * @param bool $lock Whether the file should be locked when writing to it * * @return void * * @throws IOException If the file is not writable */ public function appendToFile(string $filename, $content/* , bool $lock = false */) { if (\is_array($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); } $lock = \func_num_args() > 2 && func_get_arg(2); if (false === self::box('file_put_contents', $filename, $content, \FILE_APPEND | ($lock ? \LOCK_EX : 0))) { throw new IOException(sprintf('Failed to write file "%s": ', $filename).self::$lastError, 0, null, $filename); } } private function toIterable(string|iterable $files): iterable { return is_iterable($files) ? $files : [$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]]; } private static function assertFunctionExists(string $func): void { if (!\function_exists($func)) { throw new IOException(sprintf('Unable to perform filesystem operation because the "%s()" function has been disabled.', $func)); } } private static function box(string $func, mixed ...$args): mixed { self::assertFunctionExists($func); self::$lastError = null; set_error_handler(__CLASS__.'::handleError'); try { return $func(...$args); } finally { restore_error_handler(); } } /** * @internal */ public static function handleError(int $type, string $msg): void { self::$lastError = $msg; } }