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Diffstat (limited to 'client/node_modules/@types/node/ts4.8/fs.d.ts')
| -rwxr-xr-x | client/node_modules/@types/node/ts4.8/fs.d.ts | 3872 |
1 files changed, 3872 insertions, 0 deletions
diff --git a/client/node_modules/@types/node/ts4.8/fs.d.ts b/client/node_modules/@types/node/ts4.8/fs.d.ts new file mode 100755 index 0000000..75c53fb --- /dev/null +++ b/client/node_modules/@types/node/ts4.8/fs.d.ts @@ -0,0 +1,3872 @@ +/** + * The `fs` module enables interacting with the file system in a + * way modeled on standard POSIX functions. + * + * To use the promise-based APIs: + * + * ```js + * import * as fs from 'fs/promises'; + * ``` + * + * To use the callback and sync APIs: + * + * ```js + * import * as fs from 'fs'; + * ``` + * + * All file system operations have synchronous, callback, and promise-based + * forms, and are accessible using both CommonJS syntax and ES6 Modules (ESM). + * @see [source](https://github.com/nodejs/node/blob/v18.0.0/lib/fs.js) + */ +declare module 'fs' { + import * as stream from 'node:stream'; + import { Abortable, EventEmitter } from 'node:events'; + import { URL } from 'node:url'; + import * as promises from 'node:fs/promises'; + export { promises }; + /** + * Valid types for path values in "fs". + */ + export type PathLike = string | Buffer | URL; + export type PathOrFileDescriptor = PathLike | number; + export type TimeLike = string | number | Date; + export type NoParamCallback = (err: NodeJS.ErrnoException | null) => void; + export type BufferEncodingOption = + | 'buffer' + | { + encoding: 'buffer'; + }; + export interface ObjectEncodingOptions { + encoding?: BufferEncoding | null | undefined; + } + export type EncodingOption = ObjectEncodingOptions | BufferEncoding | undefined | null; + export type OpenMode = number | string; + export type Mode = number | string; + export interface StatsBase<T> { + isFile(): boolean; + isDirectory(): boolean; + isBlockDevice(): boolean; + isCharacterDevice(): boolean; + isSymbolicLink(): boolean; + isFIFO(): boolean; + isSocket(): boolean; + dev: T; + ino: T; + mode: T; + nlink: T; + uid: T; + gid: T; + rdev: T; + size: T; + blksize: T; + blocks: T; + atimeMs: T; + mtimeMs: T; + ctimeMs: T; + birthtimeMs: T; + atime: Date; + mtime: Date; + ctime: Date; + birthtime: Date; + } + export interface Stats extends StatsBase<number> {} + /** + * A `fs.Stats` object provides information about a file. + * + * Objects returned from {@link stat}, {@link lstat} and {@link fstat} and + * their synchronous counterparts are of this type. + * If `bigint` in the `options` passed to those methods is true, the numeric values + * will be `bigint` instead of `number`, and the object will contain additional + * nanosecond-precision properties suffixed with `Ns`. + * + * ```console + * Stats { + * dev: 2114, + * ino: 48064969, + * mode: 33188, + * nlink: 1, + * uid: 85, + * gid: 100, + * rdev: 0, + * size: 527, + * blksize: 4096, + * blocks: 8, + * atimeMs: 1318289051000.1, + * mtimeMs: 1318289051000.1, + * ctimeMs: 1318289051000.1, + * birthtimeMs: 1318289051000.1, + * atime: Mon, 10 Oct 2011 23:24:11 GMT, + * mtime: Mon, 10 Oct 2011 23:24:11 GMT, + * ctime: Mon, 10 Oct 2011 23:24:11 GMT, + * birthtime: Mon, 10 Oct 2011 23:24:11 GMT } + * ``` + * + * `bigint` version: + * + * ```console + * BigIntStats { + * dev: 2114n, + * ino: 48064969n, + * mode: 33188n, + * nlink: 1n, + * uid: 85n, + * gid: 100n, + * rdev: 0n, + * size: 527n, + * blksize: 4096n, + * blocks: 8n, + * atimeMs: 1318289051000n, + * mtimeMs: 1318289051000n, + * ctimeMs: 1318289051000n, + * birthtimeMs: 1318289051000n, + * atimeNs: 1318289051000000000n, + * mtimeNs: 1318289051000000000n, + * ctimeNs: 1318289051000000000n, + * birthtimeNs: 1318289051000000000n, + * atime: Mon, 10 Oct 2011 23:24:11 GMT, + * mtime: Mon, 10 Oct 2011 23:24:11 GMT, + * ctime: Mon, 10 Oct 2011 23:24:11 GMT, + * birthtime: Mon, 10 Oct 2011 23:24:11 GMT } + * ``` + * @since v0.1.21 + */ + export class Stats {} + /** + * A representation of a directory entry, which can be a file or a subdirectory + * within the directory, as returned by reading from an `fs.Dir`. The + * directory entry is a combination of the file name and file type pairs. + * + * Additionally, when {@link readdir} or {@link readdirSync} is called with + * the `withFileTypes` option set to `true`, the resulting array is filled with `fs.Dirent` objects, rather than strings or `Buffer` s. + * @since v10.10.0 + */ + export class Dirent { + /** + * Returns `true` if the `fs.Dirent` object describes a regular file. + * @since v10.10.0 + */ + isFile(): boolean; + /** + * Returns `true` if the `fs.Dirent` object describes a file system + * directory. + * @since v10.10.0 + */ + isDirectory(): boolean; + /** + * Returns `true` if the `fs.Dirent` object describes a block device. + * @since v10.10.0 + */ + isBlockDevice(): boolean; + /** + * Returns `true` if the `fs.Dirent` object describes a character device. + * @since v10.10.0 + */ + isCharacterDevice(): boolean; + /** + * Returns `true` if the `fs.Dirent` object describes a symbolic link. + * @since v10.10.0 + */ + isSymbolicLink(): boolean; + /** + * Returns `true` if the `fs.Dirent` object describes a first-in-first-out + * (FIFO) pipe. + * @since v10.10.0 + */ + isFIFO(): boolean; + /** + * Returns `true` if the `fs.Dirent` object describes a socket. + * @since v10.10.0 + */ + isSocket(): boolean; + /** + * The file name that this `fs.Dirent` object refers to. The type of this + * value is determined by the `options.encoding` passed to {@link readdir} or {@link readdirSync}. + * @since v10.10.0 + */ + name: string; + } + /** + * A class representing a directory stream. + * + * Created by {@link opendir}, {@link opendirSync}, or `fsPromises.opendir()`. + * + * ```js + * import { opendir } from 'fs/promises'; + * + * try { + * const dir = await opendir('./'); + * for await (const dirent of dir) + * console.log(dirent.name); + * } catch (err) { + * console.error(err); + * } + * ``` + * + * When using the async iterator, the `fs.Dir` object will be automatically + * closed after the iterator exits. + * @since v12.12.0 + */ + export class Dir implements AsyncIterable<Dirent> { + /** + * The read-only path of this directory as was provided to {@link opendir},{@link opendirSync}, or `fsPromises.opendir()`. + * @since v12.12.0 + */ + readonly path: string; + /** + * Asynchronously iterates over the directory via `readdir(3)` until all entries have been read. + */ + [Symbol.asyncIterator](): AsyncIterableIterator<Dirent>; + /** + * Asynchronously close the directory's underlying resource handle. + * Subsequent reads will result in errors. + * + * A promise is returned that will be resolved after the resource has been + * closed. + * @since v12.12.0 + */ + close(): Promise<void>; + close(cb: NoParamCallback): void; + /** + * Synchronously close the directory's underlying resource handle. + * Subsequent reads will result in errors. + * @since v12.12.0 + */ + closeSync(): void; + /** + * Asynchronously read the next directory entry via [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) as an `fs.Dirent`. + * + * A promise is returned that will be resolved with an `fs.Dirent`, or `null`if there are no more directory entries to read. + * + * Directory entries returned by this function are in no particular order as + * provided by the operating system's underlying directory mechanisms. + * Entries added or removed while iterating over the directory might not be + * included in the iteration results. + * @since v12.12.0 + * @return containing {fs.Dirent|null} + */ + read(): Promise<Dirent | null>; + read(cb: (err: NodeJS.ErrnoException | null, dirEnt: Dirent | null) => void): void; + /** + * Synchronously read the next directory entry as an `fs.Dirent`. See the + * POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more detail. + * + * If there are no more directory entries to read, `null` will be returned. + * + * Directory entries returned by this function are in no particular order as + * provided by the operating system's underlying directory mechanisms. + * Entries added or removed while iterating over the directory might not be + * included in the iteration results. + * @since v12.12.0 + */ + readSync(): Dirent | null; + } + /** + * Class: fs.StatWatcher + * @since v14.3.0, v12.20.0 + * Extends `EventEmitter` + * A successful call to {@link watchFile} method will return a new fs.StatWatcher object. + */ + export interface StatWatcher extends EventEmitter { + /** + * When called, requests that the Node.js event loop _not_ exit so long as the `fs.StatWatcher` is active. Calling `watcher.ref()` multiple times will have + * no effect. + * + * By default, all `fs.StatWatcher` objects are "ref'ed", making it normally + * unnecessary to call `watcher.ref()` unless `watcher.unref()` had been + * called previously. + * @since v14.3.0, v12.20.0 + */ + ref(): this; + /** + * When called, the active `fs.StatWatcher` object will not require the Node.js + * event loop to remain active. If there is no other activity keeping the + * event loop running, the process may exit before the `fs.StatWatcher` object's + * callback is invoked. Calling `watcher.unref()` multiple times will have + * no effect. + * @since v14.3.0, v12.20.0 + */ + unref(): this; + } + export interface FSWatcher extends EventEmitter { + /** + * Stop watching for changes on the given `fs.FSWatcher`. Once stopped, the `fs.FSWatcher` object is no longer usable. + * @since v0.5.8 + */ + close(): void; + /** + * events.EventEmitter + * 1. change + * 2. error + */ + addListener(event: string, listener: (...args: any[]) => void): this; + addListener(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this; + addListener(event: 'error', listener: (error: Error) => void): this; + addListener(event: 'close', listener: () => void): this; + on(event: string, listener: (...args: any[]) => void): this; + on(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this; + on(event: 'error', listener: (error: Error) => void): this; + on(event: 'close', listener: () => void): this; + once(event: string, listener: (...args: any[]) => void): this; + once(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this; + once(event: 'error', listener: (error: Error) => void): this; + once(event: 'close', listener: () => void): this; + prependListener(event: string, listener: (...args: any[]) => void): this; + prependListener(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this; + prependListener(event: 'error', listener: (error: Error) => void): this; + prependListener(event: 'close', listener: () => void): this; + prependOnceListener(event: string, listener: (...args: any[]) => void): this; + prependOnceListener(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this; + prependOnceListener(event: 'error', listener: (error: Error) => void): this; + prependOnceListener(event: 'close', listener: () => void): this; + } + /** + * Instances of `fs.ReadStream` are created and returned using the {@link createReadStream} function. + * @since v0.1.93 + */ + export class ReadStream extends stream.Readable { + close(callback?: (err?: NodeJS.ErrnoException | null) => void): void; + /** + * The number of bytes that have been read so far. + * @since v6.4.0 + */ + bytesRead: number; + /** + * The path to the file the stream is reading from as specified in the first + * argument to `fs.createReadStream()`. If `path` is passed as a string, then`readStream.path` will be a string. If `path` is passed as a `Buffer`, then`readStream.path` will be a + * `Buffer`. If `fd` is specified, then`readStream.path` will be `undefined`. + * @since v0.1.93 + */ + path: string | Buffer; + /** + * This property is `true` if the underlying file has not been opened yet, + * i.e. before the `'ready'` event is emitted. + * @since v11.2.0, v10.16.0 + */ + pending: boolean; + /** + * events.EventEmitter + * 1. open + * 2. close + * 3. ready + */ + addListener(event: 'close', listener: () => void): this; + addListener(event: 'data', listener: (chunk: Buffer | string) => void): this; + addListener(event: 'end', listener: () => void): this; + addListener(event: 'error', listener: (err: Error) => void): this; + addListener(event: 'open', listener: (fd: number) => void): this; + addListener(event: 'pause', listener: () => void): this; + addListener(event: 'readable', listener: () => void): this; + addListener(event: 'ready', listener: () => void): this; + addListener(event: 'resume', listener: () => void): this; + addListener(event: string | symbol, listener: (...args: any[]) => void): this; + on(event: 'close', listener: () => void): this; + on(event: 'data', listener: (chunk: Buffer | string) => void): this; + on(event: 'end', listener: () => void): this; + on(event: 'error', listener: (err: Error) => void): this; + on(event: 'open', listener: (fd: number) => void): this; + on(event: 'pause', listener: () => void): this; + on(event: 'readable', listener: () => void): this; + on(event: 'ready', listener: () => void): this; + on(event: 'resume', listener: () => void): this; + on(event: string | symbol, listener: (...args: any[]) => void): this; + once(event: 'close', listener: () => void): this; + once(event: 'data', listener: (chunk: Buffer | string) => void): this; + once(event: 'end', listener: () => void): this; + once(event: 'error', listener: (err: Error) => void): this; + once(event: 'open', listener: (fd: number) => void): this; + once(event: 'pause', listener: () => void): this; + once(event: 'readable', listener: () => void): this; + once(event: 'ready', listener: () => void): this; + once(event: 'resume', listener: () => void): this; + once(event: string | symbol, listener: (...args: any[]) => void): this; + prependListener(event: 'close', listener: () => void): this; + prependListener(event: 'data', listener: (chunk: Buffer | string) => void): this; + prependListener(event: 'end', listener: () => void): this; + prependListener(event: 'error', listener: (err: Error) => void): this; + prependListener(event: 'open', listener: (fd: number) => void): this; + prependListener(event: 'pause', listener: () => void): this; + prependListener(event: 'readable', listener: () => void): this; + prependListener(event: 'ready', listener: () => void): this; + prependListener(event: 'resume', listener: () => void): this; + prependListener(event: string | symbol, listener: (...args: any[]) => void): this; + prependOnceListener(event: 'close', listener: () => void): this; + prependOnceListener(event: 'data', listener: (chunk: Buffer | string) => void): this; + prependOnceListener(event: 'end', listener: () => void): this; + prependOnceListener(event: 'error', listener: (err: Error) => void): this; + prependOnceListener(event: 'open', listener: (fd: number) => void): this; + prependOnceListener(event: 'pause', listener: () => void): this; + prependOnceListener(event: 'readable', listener: () => void): this; + prependOnceListener(event: 'ready', listener: () => void): this; + prependOnceListener(event: 'resume', listener: () => void): this; + prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this; + } + /** + * * Extends `stream.Writable` + * + * Instances of `fs.WriteStream` are created and returned using the {@link createWriteStream} function. + * @since v0.1.93 + */ + export class WriteStream extends stream.Writable { + /** + * Closes `writeStream`. Optionally accepts a + * callback that will be executed once the `writeStream`is closed. + * @since v0.9.4 + */ + close(callback?: (err?: NodeJS.ErrnoException | null) => void): void; + /** + * The number of bytes written so far. Does not include data that is still queued + * for writing. + * @since v0.4.7 + */ + bytesWritten: number; + /** + * The path to the file the stream is writing to as specified in the first + * argument to {@link createWriteStream}. If `path` is passed as a string, then`writeStream.path` will be a string. If `path` is passed as a `Buffer`, then`writeStream.path` will be a + * `Buffer`. + * @since v0.1.93 + */ + path: string | Buffer; + /** + * This property is `true` if the underlying file has not been opened yet, + * i.e. before the `'ready'` event is emitted. + * @since v11.2.0 + */ + pending: boolean; + /** + * events.EventEmitter + * 1. open + * 2. close + * 3. ready + */ + addListener(event: 'close', listener: () => void): this; + addListener(event: 'drain', listener: () => void): this; + addListener(event: 'error', listener: (err: Error) => void): this; + addListener(event: 'finish', listener: () => void): this; + addListener(event: 'open', listener: (fd: number) => void): this; + addListener(event: 'pipe', listener: (src: stream.Readable) => void): this; + addListener(event: 'ready', listener: () => void): this; + addListener(event: 'unpipe', listener: (src: stream.Readable) => void): this; + addListener(event: string | symbol, listener: (...args: any[]) => void): this; + on(event: 'close', listener: () => void): this; + on(event: 'drain', listener: () => void): this; + on(event: 'error', listener: (err: Error) => void): this; + on(event: 'finish', listener: () => void): this; + on(event: 'open', listener: (fd: number) => void): this; + on(event: 'pipe', listener: (src: stream.Readable) => void): this; + on(event: 'ready', listener: () => void): this; + on(event: 'unpipe', listener: (src: stream.Readable) => void): this; + on(event: string | symbol, listener: (...args: any[]) => void): this; + once(event: 'close', listener: () => void): this; + once(event: 'drain', listener: () => void): this; + once(event: 'error', listener: (err: Error) => void): this; + once(event: 'finish', listener: () => void): this; + once(event: 'open', listener: (fd: number) => void): this; + once(event: 'pipe', listener: (src: stream.Readable) => void): this; + once(event: 'ready', listener: () => void): this; + once(event: 'unpipe', listener: (src: stream.Readable) => void): this; + once(event: string | symbol, listener: (...args: any[]) => void): this; + prependListener(event: 'close', listener: () => void): this; + prependListener(event: 'drain', listener: () => void): this; + prependListener(event: 'error', listener: (err: Error) => void): this; + prependListener(event: 'finish', listener: () => void): this; + prependListener(event: 'open', listener: (fd: number) => void): this; + prependListener(event: 'pipe', listener: (src: stream.Readable) => void): this; + prependListener(event: 'ready', listener: () => void): this; + prependListener(event: 'unpipe', listener: (src: stream.Readable) => void): this; + prependListener(event: string | symbol, listener: (...args: any[]) => void): this; + prependOnceListener(event: 'close', listener: () => void): this; + prependOnceListener(event: 'drain', listener: () => void): this; + prependOnceListener(event: 'error', listener: (err: Error) => void): this; + prependOnceListener(event: 'finish', listener: () => void): this; + prependOnceListener(event: 'open', listener: (fd: number) => void): this; + prependOnceListener(event: 'pipe', listener: (src: stream.Readable) => void): this; + prependOnceListener(event: 'ready', listener: () => void): this; + prependOnceListener(event: 'unpipe', listener: (src: stream.Readable) => void): this; + prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this; + } + /** + * Asynchronously rename file at `oldPath` to the pathname provided + * as `newPath`. In the case that `newPath` already exists, it will + * be overwritten. If there is a directory at `newPath`, an error will + * be raised instead. No arguments other than a possible exception are + * given to the completion callback. + * + * See also: [`rename(2)`](http://man7.org/linux/man-pages/man2/rename.2.html). + * + * ```js + * import { rename } from 'fs'; + * + * rename('oldFile.txt', 'newFile.txt', (err) => { + * if (err) throw err; + * console.log('Rename complete!'); + * }); + * ``` + * @since v0.0.2 + */ + export function rename(oldPath: PathLike, newPath: PathLike, callback: NoParamCallback): void; + export namespace rename { + /** + * Asynchronous rename(2) - Change the name or location of a file or directory. + * @param oldPath A path to a file. If a URL is provided, it must use the `file:` protocol. + * URL support is _experimental_. + * @param newPath A path to a file. If a URL is provided, it must use the `file:` protocol. + * URL support is _experimental_. + */ + function __promisify__(oldPath: PathLike, newPath: PathLike): Promise<void>; + } + /** + * Renames the file from `oldPath` to `newPath`. Returns `undefined`. + * + * See the POSIX [`rename(2)`](http://man7.org/linux/man-pages/man2/rename.2.html) documentation for more details. + * @since v0.1.21 + */ + export function renameSync(oldPath: PathLike, newPath: PathLike): void; + /** + * Truncates the file. No arguments other than a possible exception are + * given to the completion callback. A file descriptor can also be passed as the + * first argument. In this case, `fs.ftruncate()` is called. + * + * ```js + * import { truncate } from 'fs'; + * // Assuming that 'path/file.txt' is a regular file. + * truncate('path/file.txt', (err) => { + * if (err) throw err; + * console.log('path/file.txt was truncated'); + * }); + * ``` + * + * Passing a file descriptor is deprecated and may result in an error being thrown + * in the future. + * + * See the POSIX [`truncate(2)`](http://man7.org/linux/man-pages/man2/truncate.2.html) documentation for more details. + * @since v0.8.6 + * @param [len=0] + */ + export function truncate(path: PathLike, len: number | undefined | null, callback: NoParamCallback): void; + /** + * Asynchronous truncate(2) - Truncate a file to a specified length. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + export function truncate(path: PathLike, callback: NoParamCallback): void; + export namespace truncate { + /** + * Asynchronous truncate(2) - Truncate a file to a specified length. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param len If not specified, defaults to `0`. + */ + function __promisify__(path: PathLike, len?: number | null): Promise<void>; + } + /** + * Truncates the file. Returns `undefined`. A file descriptor can also be + * passed as the first argument. In this case, `fs.ftruncateSync()` is called. + * + * Passing a file descriptor is deprecated and may result in an error being thrown + * in the future. + * @since v0.8.6 + * @param [len=0] + */ + export function truncateSync(path: PathLike, len?: number | null): void; + /** + * Truncates the file descriptor. No arguments other than a possible exception are + * given to the completion callback. + * + * See the POSIX [`ftruncate(2)`](http://man7.org/linux/man-pages/man2/ftruncate.2.html) documentation for more detail. + * + * If the file referred to by the file descriptor was larger than `len` bytes, only + * the first `len` bytes will be retained in the file. + * + * For example, the following program retains only the first four bytes of the + * file: + * + * ```js + * import { open, close, ftruncate } from 'fs'; + * + * function closeFd(fd) { + * close(fd, (err) => { + * if (err) throw err; + * }); + * } + * + * open('temp.txt', 'r+', (err, fd) => { + * if (err) throw err; + * + * try { + * ftruncate(fd, 4, (err) => { + * closeFd(fd); + * if (err) throw err; + * }); + * } catch (err) { + * closeFd(fd); + * if (err) throw err; + * } + * }); + * ``` + * + * If the file previously was shorter than `len` bytes, it is extended, and the + * extended part is filled with null bytes (`'\0'`): + * + * If `len` is negative then `0` will be used. + * @since v0.8.6 + * @param [len=0] + */ + export function ftruncate(fd: number, len: number | undefined | null, callback: NoParamCallback): void; + /** + * Asynchronous ftruncate(2) - Truncate a file to a specified length. + * @param fd A file descriptor. + */ + export function ftruncate(fd: number, callback: NoParamCallback): void; + export namespace ftruncate { + /** + * Asynchronous ftruncate(2) - Truncate a file to a specified length. + * @param fd A file descriptor. + * @param len If not specified, defaults to `0`. + */ + function __promisify__(fd: number, len?: number | null): Promise<void>; + } + /** + * Truncates the file descriptor. Returns `undefined`. + * + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link ftruncate}. + * @since v0.8.6 + * @param [len=0] + */ + export function ftruncateSync(fd: number, len?: number | null): void; + /** + * Asynchronously changes owner and group of a file. No arguments other than a + * possible exception are given to the completion callback. + * + * See the POSIX [`chown(2)`](http://man7.org/linux/man-pages/man2/chown.2.html) documentation for more detail. + * @since v0.1.97 + */ + export function chown(path: PathLike, uid: number, gid: number, callback: NoParamCallback): void; + export namespace chown { + /** + * Asynchronous chown(2) - Change ownership of a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + function __promisify__(path: PathLike, uid: number, gid: number): Promise<void>; + } + /** + * Synchronously changes owner and group of a file. Returns `undefined`. + * This is the synchronous version of {@link chown}. + * + * See the POSIX [`chown(2)`](http://man7.org/linux/man-pages/man2/chown.2.html) documentation for more detail. + * @since v0.1.97 + */ + export function chownSync(path: PathLike, uid: number, gid: number): void; + /** + * Sets the owner of the file. No arguments other than a possible exception are + * given to the completion callback. + * + * See the POSIX [`fchown(2)`](http://man7.org/linux/man-pages/man2/fchown.2.html) documentation for more detail. + * @since v0.4.7 + */ + export function fchown(fd: number, uid: number, gid: number, callback: NoParamCallback): void; + export namespace fchown { + /** + * Asynchronous fchown(2) - Change ownership of a file. + * @param fd A file descriptor. + */ + function __promisify__(fd: number, uid: number, gid: number): Promise<void>; + } + /** + * Sets the owner of the file. Returns `undefined`. + * + * See the POSIX [`fchown(2)`](http://man7.org/linux/man-pages/man2/fchown.2.html) documentation for more detail. + * @since v0.4.7 + * @param uid The file's new owner's user id. + * @param gid The file's new group's group id. + */ + export function fchownSync(fd: number, uid: number, gid: number): void; + /** + * Set the owner of the symbolic link. No arguments other than a possible + * exception are given to the completion callback. + * + * See the POSIX [`lchown(2)`](http://man7.org/linux/man-pages/man2/lchown.2.html) documentation for more detail. + */ + export function lchown(path: PathLike, uid: number, gid: number, callback: NoParamCallback): void; + export namespace lchown { + /** + * Asynchronous lchown(2) - Change ownership of a file. Does not dereference symbolic links. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + function __promisify__(path: PathLike, uid: number, gid: number): Promise<void>; + } + /** + * Set the owner for the path. Returns `undefined`. + * + * See the POSIX [`lchown(2)`](http://man7.org/linux/man-pages/man2/lchown.2.html) documentation for more details. + * @param uid The file's new owner's user id. + * @param gid The file's new group's group id. + */ + export function lchownSync(path: PathLike, uid: number, gid: number): void; + /** + * Changes the access and modification times of a file in the same way as {@link utimes}, with the difference that if the path refers to a symbolic + * link, then the link is not dereferenced: instead, the timestamps of the + * symbolic link itself are changed. + * + * No arguments other than a possible exception are given to the completion + * callback. + * @since v14.5.0, v12.19.0 + */ + export function lutimes(path: PathLike, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void; + export namespace lutimes { + /** + * Changes the access and modification times of a file in the same way as `fsPromises.utimes()`, + * with the difference that if the path refers to a symbolic link, then the link is not + * dereferenced: instead, the timestamps of the symbolic link itself are changed. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param atime The last access time. If a string is provided, it will be coerced to number. + * @param mtime The last modified time. If a string is provided, it will be coerced to number. + */ + function __promisify__(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>; + } + /** + * Change the file system timestamps of the symbolic link referenced by `path`. + * Returns `undefined`, or throws an exception when parameters are incorrect or + * the operation fails. This is the synchronous version of {@link lutimes}. + * @since v14.5.0, v12.19.0 + */ + export function lutimesSync(path: PathLike, atime: TimeLike, mtime: TimeLike): void; + /** + * Asynchronously changes the permissions of a file. No arguments other than a + * possible exception are given to the completion callback. + * + * See the POSIX [`chmod(2)`](http://man7.org/linux/man-pages/man2/chmod.2.html) documentation for more detail. + * + * ```js + * import { chmod } from 'fs'; + * + * chmod('my_file.txt', 0o775, (err) => { + * if (err) throw err; + * console.log('The permissions for file "my_file.txt" have been changed!'); + * }); + * ``` + * @since v0.1.30 + */ + export function chmod(path: PathLike, mode: Mode, callback: NoParamCallback): void; + export namespace chmod { + /** + * Asynchronous chmod(2) - Change permissions of a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param mode A file mode. If a string is passed, it is parsed as an octal integer. + */ + function __promisify__(path: PathLike, mode: Mode): Promise<void>; + } + /** + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link chmod}. + * + * See the POSIX [`chmod(2)`](http://man7.org/linux/man-pages/man2/chmod.2.html) documentation for more detail. + * @since v0.6.7 + */ + export function chmodSync(path: PathLike, mode: Mode): void; + /** + * Sets the permissions on the file. No arguments other than a possible exception + * are given to the completion callback. + * + * See the POSIX [`fchmod(2)`](http://man7.org/linux/man-pages/man2/fchmod.2.html) documentation for more detail. + * @since v0.4.7 + */ + export function fchmod(fd: number, mode: Mode, callback: NoParamCallback): void; + export namespace fchmod { + /** + * Asynchronous fchmod(2) - Change permissions of a file. + * @param fd A file descriptor. + * @param mode A file mode. If a string is passed, it is parsed as an octal integer. + */ + function __promisify__(fd: number, mode: Mode): Promise<void>; + } + /** + * Sets the permissions on the file. Returns `undefined`. + * + * See the POSIX [`fchmod(2)`](http://man7.org/linux/man-pages/man2/fchmod.2.html) documentation for more detail. + * @since v0.4.7 + */ + export function fchmodSync(fd: number, mode: Mode): void; + /** + * Changes the permissions on a symbolic link. No arguments other than a possible + * exception are given to the completion callback. + * + * This method is only implemented on macOS. + * + * See the POSIX [`lchmod(2)`](https://www.freebsd.org/cgi/man.cgi?query=lchmod&sektion=2) documentation for more detail. + * @deprecated Since v0.4.7 + */ + export function lchmod(path: PathLike, mode: Mode, callback: NoParamCallback): void; + /** @deprecated */ + export namespace lchmod { + /** + * Asynchronous lchmod(2) - Change permissions of a file. Does not dereference symbolic links. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param mode A file mode. If a string is passed, it is parsed as an octal integer. + */ + function __promisify__(path: PathLike, mode: Mode): Promise<void>; + } + /** + * Changes the permissions on a symbolic link. Returns `undefined`. + * + * This method is only implemented on macOS. + * + * See the POSIX [`lchmod(2)`](https://www.freebsd.org/cgi/man.cgi?query=lchmod&sektion=2) documentation for more detail. + * @deprecated Since v0.4.7 + */ + export function lchmodSync(path: PathLike, mode: Mode): void; + /** + * Asynchronous [`stat(2)`](http://man7.org/linux/man-pages/man2/stat.2.html). The callback gets two arguments `(err, stats)` where`stats` is an `fs.Stats` object. + * + * In case of an error, the `err.code` will be one of `Common System Errors`. + * + * Using `fs.stat()` to check for the existence of a file before calling`fs.open()`, `fs.readFile()` or `fs.writeFile()` is not recommended. + * Instead, user code should open/read/write the file directly and handle the + * error raised if the file is not available. + * + * To check if a file exists without manipulating it afterwards, {@link access} is recommended. + * + * For example, given the following directory structure: + * + * ```text + * - txtDir + * -- file.txt + * - app.js + * ``` + * + * The next program will check for the stats of the given paths: + * + * ```js + * import { stat } from 'fs'; + * + * const pathsToCheck = ['./txtDir', './txtDir/file.txt']; + * + * for (let i = 0; i < pathsToCheck.length; i++) { + * stat(pathsToCheck[i], (err, stats) => { + * console.log(stats.isDirectory()); + * console.log(stats); + * }); + * } + * ``` + * + * The resulting output will resemble: + * + * ```console + * true + * Stats { + * dev: 16777220, + * mode: 16877, + * nlink: 3, + * uid: 501, + * gid: 20, + * rdev: 0, + * blksize: 4096, + * ino: 14214262, + * size: 96, + * blocks: 0, + * atimeMs: 1561174653071.963, + * mtimeMs: 1561174614583.3518, + * ctimeMs: 1561174626623.5366, + * birthtimeMs: 1561174126937.2893, + * atime: 2019-06-22T03:37:33.072Z, + * mtime: 2019-06-22T03:36:54.583Z, + * ctime: 2019-06-22T03:37:06.624Z, + * birthtime: 2019-06-22T03:28:46.937Z + * } + * false + * Stats { + * dev: 16777220, + * mode: 33188, + * nlink: 1, + * uid: 501, + * gid: 20, + * rdev: 0, + * blksize: 4096, + * ino: 14214074, + * size: 8, + * blocks: 8, + * atimeMs: 1561174616618.8555, + * mtimeMs: 1561174614584, + * ctimeMs: 1561174614583.8145, + * birthtimeMs: 1561174007710.7478, + * atime: 2019-06-22T03:36:56.619Z, + * mtime: 2019-06-22T03:36:54.584Z, + * ctime: 2019-06-22T03:36:54.584Z, + * birthtime: 2019-06-22T03:26:47.711Z + * } + * ``` + * @since v0.0.2 + */ + export function stat(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void; + export function stat( + path: PathLike, + options: + | (StatOptions & { + bigint?: false | undefined; + }) + | undefined, + callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void + ): void; + export function stat( + path: PathLike, + options: StatOptions & { + bigint: true; + }, + callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void + ): void; + export function stat(path: PathLike, options: StatOptions | undefined, callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void): void; + export namespace stat { + /** + * Asynchronous stat(2) - Get file status. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + function __promisify__( + path: PathLike, + options?: StatOptions & { + bigint?: false | undefined; + } + ): Promise<Stats>; + function __promisify__( + path: PathLike, + options: StatOptions & { + bigint: true; + } + ): Promise<BigIntStats>; + function __promisify__(path: PathLike, options?: StatOptions): Promise<Stats | BigIntStats>; + } + export interface StatSyncFn extends Function { + (path: PathLike, options?: undefined): Stats; + ( + path: PathLike, + options?: StatSyncOptions & { + bigint?: false | undefined; + throwIfNoEntry: false; + } + ): Stats | undefined; + ( + path: PathLike, + options: StatSyncOptions & { + bigint: true; + throwIfNoEntry: false; + } + ): BigIntStats | undefined; + ( + path: PathLike, + options?: StatSyncOptions & { + bigint?: false | undefined; + } + ): Stats; + ( + path: PathLike, + options: StatSyncOptions & { + bigint: true; + } + ): BigIntStats; + ( + path: PathLike, + options: StatSyncOptions & { + bigint: boolean; + throwIfNoEntry?: false | undefined; + } + ): Stats | BigIntStats; + (path: PathLike, options?: StatSyncOptions): Stats | BigIntStats | undefined; + } + /** + * Synchronous stat(2) - Get file status. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + export const statSync: StatSyncFn; + /** + * Invokes the callback with the `fs.Stats` for the file descriptor. + * + * See the POSIX [`fstat(2)`](http://man7.org/linux/man-pages/man2/fstat.2.html) documentation for more detail. + * @since v0.1.95 + */ + export function fstat(fd: number, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void; + export function fstat( + fd: number, + options: + | (StatOptions & { + bigint?: false | undefined; + }) + | undefined, + callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void + ): void; + export function fstat( + fd: number, + options: StatOptions & { + bigint: true; + }, + callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void + ): void; + export function fstat(fd: number, options: StatOptions | undefined, callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void): void; + export namespace fstat { + /** + * Asynchronous fstat(2) - Get file status. + * @param fd A file descriptor. + */ + function __promisify__( + fd: number, + options?: StatOptions & { + bigint?: false | undefined; + } + ): Promise<Stats>; + function __promisify__( + fd: number, + options: StatOptions & { + bigint: true; + } + ): Promise<BigIntStats>; + function __promisify__(fd: number, options?: StatOptions): Promise<Stats | BigIntStats>; + } + /** + * Retrieves the `fs.Stats` for the file descriptor. + * + * See the POSIX [`fstat(2)`](http://man7.org/linux/man-pages/man2/fstat.2.html) documentation for more detail. + * @since v0.1.95 + */ + export function fstatSync( + fd: number, + options?: StatOptions & { + bigint?: false | undefined; + } + ): Stats; + export function fstatSync( + fd: number, + options: StatOptions & { + bigint: true; + } + ): BigIntStats; + export function fstatSync(fd: number, options?: StatOptions): Stats | BigIntStats; + /** + * Retrieves the `fs.Stats` for the symbolic link referred to by the path. + * The callback gets two arguments `(err, stats)` where `stats` is a `fs.Stats` object. `lstat()` is identical to `stat()`, except that if `path` is a symbolic + * link, then the link itself is stat-ed, not the file that it refers to. + * + * See the POSIX [`lstat(2)`](http://man7.org/linux/man-pages/man2/lstat.2.html) documentation for more details. + * @since v0.1.30 + */ + export function lstat(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void; + export function lstat( + path: PathLike, + options: + | (StatOptions & { + bigint?: false | undefined; + }) + | undefined, + callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void + ): void; + export function lstat( + path: PathLike, + options: StatOptions & { + bigint: true; + }, + callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void + ): void; + export function lstat(path: PathLike, options: StatOptions | undefined, callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void): void; + export namespace lstat { + /** + * Asynchronous lstat(2) - Get file status. Does not dereference symbolic links. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + function __promisify__( + path: PathLike, + options?: StatOptions & { + bigint?: false | undefined; + } + ): Promise<Stats>; + function __promisify__( + path: PathLike, + options: StatOptions & { + bigint: true; + } + ): Promise<BigIntStats>; + function __promisify__(path: PathLike, options?: StatOptions): Promise<Stats | BigIntStats>; + } + /** + * Synchronous lstat(2) - Get file status. Does not dereference symbolic links. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + export const lstatSync: StatSyncFn; + /** + * Creates a new link from the `existingPath` to the `newPath`. See the POSIX [`link(2)`](http://man7.org/linux/man-pages/man2/link.2.html) documentation for more detail. No arguments other than + * a possible + * exception are given to the completion callback. + * @since v0.1.31 + */ + export function link(existingPath: PathLike, newPath: PathLike, callback: NoParamCallback): void; + export namespace link { + /** + * Asynchronous link(2) - Create a new link (also known as a hard link) to an existing file. + * @param existingPath A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param newPath A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + function __promisify__(existingPath: PathLike, newPath: PathLike): Promise<void>; + } + /** + * Creates a new link from the `existingPath` to the `newPath`. See the POSIX [`link(2)`](http://man7.org/linux/man-pages/man2/link.2.html) documentation for more detail. Returns `undefined`. + * @since v0.1.31 + */ + export function linkSync(existingPath: PathLike, newPath: PathLike): void; + /** + * Creates the link called `path` pointing to `target`. No arguments other than a + * possible exception are given to the completion callback. + * + * See the POSIX [`symlink(2)`](http://man7.org/linux/man-pages/man2/symlink.2.html) documentation for more details. + * + * The `type` argument is only available on Windows and ignored on other platforms. + * It can be set to `'dir'`, `'file'`, or `'junction'`. If the `type` argument is + * not set, Node.js will autodetect `target` type and use `'file'` or `'dir'`. If + * the `target` does not exist, `'file'` will be used. Windows junction points + * require the destination path to be absolute. When using `'junction'`, the`target` argument will automatically be normalized to absolute path. + * + * Relative targets are relative to the link’s parent directory. + * + * ```js + * import { symlink } from 'fs'; + * + * symlink('./mew', './mewtwo', callback); + * ``` + * + * The above example creates a symbolic link `mewtwo` which points to `mew` in the + * same directory: + * + * ```bash + * $ tree . + * . + * ├── mew + * └── mewtwo -> ./mew + * ``` + * @since v0.1.31 + */ + export function symlink(target: PathLike, path: PathLike, type: symlink.Type | undefined | null, callback: NoParamCallback): void; + /** + * Asynchronous symlink(2) - Create a new symbolic link to an existing file. + * @param target A path to an existing file. If a URL is provided, it must use the `file:` protocol. + * @param path A path to the new symlink. If a URL is provided, it must use the `file:` protocol. + */ + export function symlink(target: PathLike, path: PathLike, callback: NoParamCallback): void; + export namespace symlink { + /** + * Asynchronous symlink(2) - Create a new symbolic link to an existing file. + * @param target A path to an existing file. If a URL is provided, it must use the `file:` protocol. + * @param path A path to the new symlink. If a URL is provided, it must use the `file:` protocol. + * @param type May be set to `'dir'`, `'file'`, or `'junction'` (default is `'file'`) and is only available on Windows (ignored on other platforms). + * When using `'junction'`, the `target` argument will automatically be normalized to an absolute path. + */ + function __promisify__(target: PathLike, path: PathLike, type?: string | null): Promise<void>; + type Type = 'dir' | 'file' | 'junction'; + } + /** + * Returns `undefined`. + * + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link symlink}. + * @since v0.1.31 + */ + export function symlinkSync(target: PathLike, path: PathLike, type?: symlink.Type | null): void; + /** + * Reads the contents of the symbolic link referred to by `path`. The callback gets + * two arguments `(err, linkString)`. + * + * See the POSIX [`readlink(2)`](http://man7.org/linux/man-pages/man2/readlink.2.html) documentation for more details. + * + * The optional `options` argument can be a string specifying an encoding, or an + * object with an `encoding` property specifying the character encoding to use for + * the link path passed to the callback. If the `encoding` is set to `'buffer'`, + * the link path returned will be passed as a `Buffer` object. + * @since v0.1.31 + */ + export function readlink(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, linkString: string) => void): void; + /** + * Asynchronous readlink(2) - read value of a symbolic link. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function readlink(path: PathLike, options: BufferEncodingOption, callback: (err: NodeJS.ErrnoException | null, linkString: Buffer) => void): void; + /** + * Asynchronous readlink(2) - read value of a symbolic link. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function readlink(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, linkString: string | Buffer) => void): void; + /** + * Asynchronous readlink(2) - read value of a symbolic link. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + export function readlink(path: PathLike, callback: (err: NodeJS.ErrnoException | null, linkString: string) => void): void; + export namespace readlink { + /** + * Asynchronous readlink(2) - read value of a symbolic link. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__(path: PathLike, options?: EncodingOption): Promise<string>; + /** + * Asynchronous readlink(2) - read value of a symbolic link. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__(path: PathLike, options: BufferEncodingOption): Promise<Buffer>; + /** + * Asynchronous readlink(2) - read value of a symbolic link. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__(path: PathLike, options?: EncodingOption): Promise<string | Buffer>; + } + /** + * Returns the symbolic link's string value. + * + * See the POSIX [`readlink(2)`](http://man7.org/linux/man-pages/man2/readlink.2.html) documentation for more details. + * + * The optional `options` argument can be a string specifying an encoding, or an + * object with an `encoding` property specifying the character encoding to use for + * the link path returned. If the `encoding` is set to `'buffer'`, + * the link path returned will be passed as a `Buffer` object. + * @since v0.1.31 + */ + export function readlinkSync(path: PathLike, options?: EncodingOption): string; + /** + * Synchronous readlink(2) - read value of a symbolic link. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function readlinkSync(path: PathLike, options: BufferEncodingOption): Buffer; + /** + * Synchronous readlink(2) - read value of a symbolic link. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function readlinkSync(path: PathLike, options?: EncodingOption): string | Buffer; + /** + * Asynchronously computes the canonical pathname by resolving `.`, `..` and + * symbolic links. + * + * A canonical pathname is not necessarily unique. Hard links and bind mounts can + * expose a file system entity through many pathnames. + * + * This function behaves like [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html), with some exceptions: + * + * 1. No case conversion is performed on case-insensitive file systems. + * 2. The maximum number of symbolic links is platform-independent and generally + * (much) higher than what the native [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html) implementation supports. + * + * The `callback` gets two arguments `(err, resolvedPath)`. May use `process.cwd`to resolve relative paths. + * + * Only paths that can be converted to UTF8 strings are supported. + * + * The optional `options` argument can be a string specifying an encoding, or an + * object with an `encoding` property specifying the character encoding to use for + * the path passed to the callback. If the `encoding` is set to `'buffer'`, + * the path returned will be passed as a `Buffer` object. + * + * If `path` resolves to a socket or a pipe, the function will return a system + * dependent name for that object. + * @since v0.1.31 + */ + export function realpath(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void): void; + /** + * Asynchronous realpath(3) - return the canonicalized absolute pathname. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function realpath(path: PathLike, options: BufferEncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: Buffer) => void): void; + /** + * Asynchronous realpath(3) - return the canonicalized absolute pathname. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function realpath(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string | Buffer) => void): void; + /** + * Asynchronous realpath(3) - return the canonicalized absolute pathname. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + export function realpath(path: PathLike, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void): void; + export namespace realpath { + /** + * Asynchronous realpath(3) - return the canonicalized absolute pathname. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__(path: PathLike, options?: EncodingOption): Promise<string>; + /** + * Asynchronous realpath(3) - return the canonicalized absolute pathname. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__(path: PathLike, options: BufferEncodingOption): Promise<Buffer>; + /** + * Asynchronous realpath(3) - return the canonicalized absolute pathname. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__(path: PathLike, options?: EncodingOption): Promise<string | Buffer>; + /** + * Asynchronous [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html). + * + * The `callback` gets two arguments `(err, resolvedPath)`. + * + * Only paths that can be converted to UTF8 strings are supported. + * + * The optional `options` argument can be a string specifying an encoding, or an + * object with an `encoding` property specifying the character encoding to use for + * the path passed to the callback. If the `encoding` is set to `'buffer'`, + * the path returned will be passed as a `Buffer` object. + * + * On Linux, when Node.js is linked against musl libc, the procfs file system must + * be mounted on `/proc` in order for this function to work. Glibc does not have + * this restriction. + * @since v9.2.0 + */ + function native(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void): void; + function native(path: PathLike, options: BufferEncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: Buffer) => void): void; + function native(path: PathLike, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string | Buffer) => void): void; + function native(path: PathLike, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void): void; + } + /** + * Returns the resolved pathname. + * + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link realpath}. + * @since v0.1.31 + */ + export function realpathSync(path: PathLike, options?: EncodingOption): string; + /** + * Synchronous realpath(3) - return the canonicalized absolute pathname. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function realpathSync(path: PathLike, options: BufferEncodingOption): Buffer; + /** + * Synchronous realpath(3) - return the canonicalized absolute pathname. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function realpathSync(path: PathLike, options?: EncodingOption): string | Buffer; + export namespace realpathSync { + function native(path: PathLike, options?: EncodingOption): string; + function native(path: PathLike, options: BufferEncodingOption): Buffer; + function native(path: PathLike, options?: EncodingOption): string | Buffer; + } + /** + * Asynchronously removes a file or symbolic link. No arguments other than a + * possible exception are given to the completion callback. + * + * ```js + * import { unlink } from 'fs'; + * // Assuming that 'path/file.txt' is a regular file. + * unlink('path/file.txt', (err) => { + * if (err) throw err; + * console.log('path/file.txt was deleted'); + * }); + * ``` + * + * `fs.unlink()` will not work on a directory, empty or otherwise. To remove a + * directory, use {@link rmdir}. + * + * See the POSIX [`unlink(2)`](http://man7.org/linux/man-pages/man2/unlink.2.html) documentation for more details. + * @since v0.0.2 + */ + export function unlink(path: PathLike, callback: NoParamCallback): void; + export namespace unlink { + /** + * Asynchronous unlink(2) - delete a name and possibly the file it refers to. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + function __promisify__(path: PathLike): Promise<void>; + } + /** + * Synchronous [`unlink(2)`](http://man7.org/linux/man-pages/man2/unlink.2.html). Returns `undefined`. + * @since v0.1.21 + */ + export function unlinkSync(path: PathLike): void; + export interface RmDirOptions { + /** + * If an `EBUSY`, `EMFILE`, `ENFILE`, `ENOTEMPTY`, or + * `EPERM` error is encountered, Node.js will retry the operation with a linear + * backoff wait of `retryDelay` ms longer on each try. This option represents the + * number of retries. This option is ignored if the `recursive` option is not + * `true`. + * @default 0 + */ + maxRetries?: number | undefined; + /** + * @deprecated since v14.14.0 In future versions of Node.js and will trigger a warning + * `fs.rmdir(path, { recursive: true })` will throw if `path` does not exist or is a file. + * Use `fs.rm(path, { recursive: true, force: true })` instead. + * + * If `true`, perform a recursive directory removal. In + * recursive mode, operations are retried on failure. + * @default false + */ + recursive?: boolean | undefined; + /** + * The amount of time in milliseconds to wait between retries. + * This option is ignored if the `recursive` option is not `true`. + * @default 100 + */ + retryDelay?: number | undefined; + } + /** + * Asynchronous [`rmdir(2)`](http://man7.org/linux/man-pages/man2/rmdir.2.html). No arguments other than a possible exception are given + * to the completion callback. + * + * Using `fs.rmdir()` on a file (not a directory) results in an `ENOENT` error on + * Windows and an `ENOTDIR` error on POSIX. + * + * To get a behavior similar to the `rm -rf` Unix command, use {@link rm} with options `{ recursive: true, force: true }`. + * @since v0.0.2 + */ + export function rmdir(path: PathLike, callback: NoParamCallback): void; + export function rmdir(path: PathLike, options: RmDirOptions, callback: NoParamCallback): void; + export namespace rmdir { + /** + * Asynchronous rmdir(2) - delete a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + function __promisify__(path: PathLike, options?: RmDirOptions): Promise<void>; + } + /** + * Synchronous [`rmdir(2)`](http://man7.org/linux/man-pages/man2/rmdir.2.html). Returns `undefined`. + * + * Using `fs.rmdirSync()` on a file (not a directory) results in an `ENOENT` error + * on Windows and an `ENOTDIR` error on POSIX. + * + * To get a behavior similar to the `rm -rf` Unix command, use {@link rmSync} with options `{ recursive: true, force: true }`. + * @since v0.1.21 + */ + export function rmdirSync(path: PathLike, options?: RmDirOptions): void; + export interface RmOptions { + /** + * When `true`, exceptions will be ignored if `path` does not exist. + * @default false + */ + force?: boolean | undefined; + /** + * If an `EBUSY`, `EMFILE`, `ENFILE`, `ENOTEMPTY`, or + * `EPERM` error is encountered, Node.js will retry the operation with a linear + * backoff wait of `retryDelay` ms longer on each try. This option represents the + * number of retries. This option is ignored if the `recursive` option is not + * `true`. + * @default 0 + */ + maxRetries?: number | undefined; + /** + * If `true`, perform a recursive directory removal. In + * recursive mode, operations are retried on failure. + * @default false + */ + recursive?: boolean | undefined; + /** + * The amount of time in milliseconds to wait between retries. + * This option is ignored if the `recursive` option is not `true`. + * @default 100 + */ + retryDelay?: number | undefined; + } + /** + * Asynchronously removes files and directories (modeled on the standard POSIX `rm`utility). No arguments other than a possible exception are given to the + * completion callback. + * @since v14.14.0 + */ + export function rm(path: PathLike, callback: NoParamCallback): void; + export function rm(path: PathLike, options: RmOptions, callback: NoParamCallback): void; + export namespace rm { + /** + * Asynchronously removes files and directories (modeled on the standard POSIX `rm` utility). + */ + function __promisify__(path: PathLike, options?: RmOptions): Promise<void>; + } + /** + * Synchronously removes files and directories (modeled on the standard POSIX `rm`utility). Returns `undefined`. + * @since v14.14.0 + */ + export function rmSync(path: PathLike, options?: RmOptions): void; + export interface MakeDirectoryOptions { + /** + * Indicates whether parent folders should be created. + * If a folder was created, the path to the first created folder will be returned. + * @default false + */ + recursive?: boolean | undefined; + /** + * A file mode. If a string is passed, it is parsed as an octal integer. If not specified + * @default 0o777 + */ + mode?: Mode | undefined; + } + /** + * Asynchronously creates a directory. + * + * The callback is given a possible exception and, if `recursive` is `true`, the + * first directory path created, `(err[, path])`.`path` can still be `undefined` when `recursive` is `true`, if no directory was + * created. + * + * The optional `options` argument can be an integer specifying `mode` (permission + * and sticky bits), or an object with a `mode` property and a `recursive`property indicating whether parent directories should be created. Calling`fs.mkdir()` when `path` is a directory that + * exists results in an error only + * when `recursive` is false. + * + * ```js + * import { mkdir } from 'fs'; + * + * // Creates /tmp/a/apple, regardless of whether `/tmp` and /tmp/a exist. + * mkdir('/tmp/a/apple', { recursive: true }, (err) => { + * if (err) throw err; + * }); + * ``` + * + * On Windows, using `fs.mkdir()` on the root directory even with recursion will + * result in an error: + * + * ```js + * import { mkdir } from 'fs'; + * + * mkdir('/', { recursive: true }, (err) => { + * // => [Error: EPERM: operation not permitted, mkdir 'C:\'] + * }); + * ``` + * + * See the POSIX [`mkdir(2)`](http://man7.org/linux/man-pages/man2/mkdir.2.html) documentation for more details. + * @since v0.1.8 + */ + export function mkdir( + path: PathLike, + options: MakeDirectoryOptions & { + recursive: true; + }, + callback: (err: NodeJS.ErrnoException | null, path?: string) => void + ): void; + /** + * Asynchronous mkdir(2) - create a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders + * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`. + */ + export function mkdir( + path: PathLike, + options: + | Mode + | (MakeDirectoryOptions & { + recursive?: false | undefined; + }) + | null + | undefined, + callback: NoParamCallback + ): void; + /** + * Asynchronous mkdir(2) - create a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders + * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`. + */ + export function mkdir(path: PathLike, options: Mode | MakeDirectoryOptions | null | undefined, callback: (err: NodeJS.ErrnoException | null, path?: string) => void): void; + /** + * Asynchronous mkdir(2) - create a directory with a mode of `0o777`. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + export function mkdir(path: PathLike, callback: NoParamCallback): void; + export namespace mkdir { + /** + * Asynchronous mkdir(2) - create a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders + * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`. + */ + function __promisify__( + path: PathLike, + options: MakeDirectoryOptions & { + recursive: true; + } + ): Promise<string | undefined>; + /** + * Asynchronous mkdir(2) - create a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders + * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`. + */ + function __promisify__( + path: PathLike, + options?: + | Mode + | (MakeDirectoryOptions & { + recursive?: false | undefined; + }) + | null + ): Promise<void>; + /** + * Asynchronous mkdir(2) - create a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders + * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`. + */ + function __promisify__(path: PathLike, options?: Mode | MakeDirectoryOptions | null): Promise<string | undefined>; + } + /** + * Synchronously creates a directory. Returns `undefined`, or if `recursive` is`true`, the first directory path created. + * This is the synchronous version of {@link mkdir}. + * + * See the POSIX [`mkdir(2)`](http://man7.org/linux/man-pages/man2/mkdir.2.html) documentation for more details. + * @since v0.1.21 + */ + export function mkdirSync( + path: PathLike, + options: MakeDirectoryOptions & { + recursive: true; + } + ): string | undefined; + /** + * Synchronous mkdir(2) - create a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders + * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`. + */ + export function mkdirSync( + path: PathLike, + options?: + | Mode + | (MakeDirectoryOptions & { + recursive?: false | undefined; + }) + | null + ): void; + /** + * Synchronous mkdir(2) - create a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders + * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`. + */ + export function mkdirSync(path: PathLike, options?: Mode | MakeDirectoryOptions | null): string | undefined; + /** + * Creates a unique temporary directory. + * + * Generates six random characters to be appended behind a required`prefix` to create a unique temporary directory. Due to platform + * inconsistencies, avoid trailing `X` characters in `prefix`. Some platforms, + * notably the BSDs, can return more than six random characters, and replace + * trailing `X` characters in `prefix` with random characters. + * + * The created directory path is passed as a string to the callback's second + * parameter. + * + * The optional `options` argument can be a string specifying an encoding, or an + * object with an `encoding` property specifying the character encoding to use. + * + * ```js + * import { mkdtemp } from 'fs'; + * + * mkdtemp(path.join(os.tmpdir(), 'foo-'), (err, directory) => { + * if (err) throw err; + * console.log(directory); + * // Prints: /tmp/foo-itXde2 or C:\Users\...\AppData\Local\Temp\foo-itXde2 + * }); + * ``` + * + * The `fs.mkdtemp()` method will append the six randomly selected characters + * directly to the `prefix` string. For instance, given a directory `/tmp`, if the + * intention is to create a temporary directory _within_`/tmp`, the `prefix`must end with a trailing platform-specific path separator + * (`require('path').sep`). + * + * ```js + * import { tmpdir } from 'os'; + * import { mkdtemp } from 'fs'; + * + * // The parent directory for the new temporary directory + * const tmpDir = tmpdir(); + * + * // This method is *INCORRECT*: + * mkdtemp(tmpDir, (err, directory) => { + * if (err) throw err; + * console.log(directory); + * // Will print something similar to `/tmpabc123`. + * // A new temporary directory is created at the file system root + * // rather than *within* the /tmp directory. + * }); + * + * // This method is *CORRECT*: + * import { sep } from 'path'; + * mkdtemp(`${tmpDir}${sep}`, (err, directory) => { + * if (err) throw err; + * console.log(directory); + * // Will print something similar to `/tmp/abc123`. + * // A new temporary directory is created within + * // the /tmp directory. + * }); + * ``` + * @since v5.10.0 + */ + export function mkdtemp(prefix: string, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, folder: string) => void): void; + /** + * Asynchronously creates a unique temporary directory. + * Generates six random characters to be appended behind a required prefix to create a unique temporary directory. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function mkdtemp( + prefix: string, + options: + | 'buffer' + | { + encoding: 'buffer'; + }, + callback: (err: NodeJS.ErrnoException | null, folder: Buffer) => void + ): void; + /** + * Asynchronously creates a unique temporary directory. + * Generates six random characters to be appended behind a required prefix to create a unique temporary directory. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function mkdtemp(prefix: string, options: EncodingOption, callback: (err: NodeJS.ErrnoException | null, folder: string | Buffer) => void): void; + /** + * Asynchronously creates a unique temporary directory. + * Generates six random characters to be appended behind a required prefix to create a unique temporary directory. + */ + export function mkdtemp(prefix: string, callback: (err: NodeJS.ErrnoException | null, folder: string) => void): void; + export namespace mkdtemp { + /** + * Asynchronously creates a unique temporary directory. + * Generates six random characters to be appended behind a required prefix to create a unique temporary directory. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__(prefix: string, options?: EncodingOption): Promise<string>; + /** + * Asynchronously creates a unique temporary directory. + * Generates six random characters to be appended behind a required prefix to create a unique temporary directory. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__(prefix: string, options: BufferEncodingOption): Promise<Buffer>; + /** + * Asynchronously creates a unique temporary directory. + * Generates six random characters to be appended behind a required prefix to create a unique temporary directory. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__(prefix: string, options?: EncodingOption): Promise<string | Buffer>; + } + /** + * Returns the created directory path. + * + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link mkdtemp}. + * + * The optional `options` argument can be a string specifying an encoding, or an + * object with an `encoding` property specifying the character encoding to use. + * @since v5.10.0 + */ + export function mkdtempSync(prefix: string, options?: EncodingOption): string; + /** + * Synchronously creates a unique temporary directory. + * Generates six random characters to be appended behind a required prefix to create a unique temporary directory. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function mkdtempSync(prefix: string, options: BufferEncodingOption): Buffer; + /** + * Synchronously creates a unique temporary directory. + * Generates six random characters to be appended behind a required prefix to create a unique temporary directory. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function mkdtempSync(prefix: string, options?: EncodingOption): string | Buffer; + /** + * Reads the contents of a directory. The callback gets two arguments `(err, files)`where `files` is an array of the names of the files in the directory excluding`'.'` and `'..'`. + * + * See the POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more details. + * + * The optional `options` argument can be a string specifying an encoding, or an + * object with an `encoding` property specifying the character encoding to use for + * the filenames passed to the callback. If the `encoding` is set to `'buffer'`, + * the filenames returned will be passed as `Buffer` objects. + * + * If `options.withFileTypes` is set to `true`, the `files` array will contain `fs.Dirent` objects. + * @since v0.1.8 + */ + export function readdir( + path: PathLike, + options: + | { + encoding: BufferEncoding | null; + withFileTypes?: false | undefined; + } + | BufferEncoding + | undefined + | null, + callback: (err: NodeJS.ErrnoException | null, files: string[]) => void + ): void; + /** + * Asynchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function readdir( + path: PathLike, + options: + | { + encoding: 'buffer'; + withFileTypes?: false | undefined; + } + | 'buffer', + callback: (err: NodeJS.ErrnoException | null, files: Buffer[]) => void + ): void; + /** + * Asynchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function readdir( + path: PathLike, + options: + | (ObjectEncodingOptions & { + withFileTypes?: false | undefined; + }) + | BufferEncoding + | undefined + | null, + callback: (err: NodeJS.ErrnoException | null, files: string[] | Buffer[]) => void + ): void; + /** + * Asynchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + export function readdir(path: PathLike, callback: (err: NodeJS.ErrnoException | null, files: string[]) => void): void; + /** + * Asynchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options If called with `withFileTypes: true` the result data will be an array of Dirent. + */ + export function readdir( + path: PathLike, + options: ObjectEncodingOptions & { + withFileTypes: true; + }, + callback: (err: NodeJS.ErrnoException | null, files: Dirent[]) => void + ): void; + export namespace readdir { + /** + * Asynchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__( + path: PathLike, + options?: + | { + encoding: BufferEncoding | null; + withFileTypes?: false | undefined; + } + | BufferEncoding + | null + ): Promise<string[]>; + /** + * Asynchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__( + path: PathLike, + options: + | 'buffer' + | { + encoding: 'buffer'; + withFileTypes?: false | undefined; + } + ): Promise<Buffer[]>; + /** + * Asynchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + function __promisify__( + path: PathLike, + options?: + | (ObjectEncodingOptions & { + withFileTypes?: false | undefined; + }) + | BufferEncoding + | null + ): Promise<string[] | Buffer[]>; + /** + * Asynchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options If called with `withFileTypes: true` the result data will be an array of Dirent + */ + function __promisify__( + path: PathLike, + options: ObjectEncodingOptions & { + withFileTypes: true; + } + ): Promise<Dirent[]>; + } + /** + * Reads the contents of the directory. + * + * See the POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more details. + * + * The optional `options` argument can be a string specifying an encoding, or an + * object with an `encoding` property specifying the character encoding to use for + * the filenames returned. If the `encoding` is set to `'buffer'`, + * the filenames returned will be passed as `Buffer` objects. + * + * If `options.withFileTypes` is set to `true`, the result will contain `fs.Dirent` objects. + * @since v0.1.21 + */ + export function readdirSync( + path: PathLike, + options?: + | { + encoding: BufferEncoding | null; + withFileTypes?: false | undefined; + } + | BufferEncoding + | null + ): string[]; + /** + * Synchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function readdirSync( + path: PathLike, + options: + | { + encoding: 'buffer'; + withFileTypes?: false | undefined; + } + | 'buffer' + ): Buffer[]; + /** + * Synchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used. + */ + export function readdirSync( + path: PathLike, + options?: + | (ObjectEncodingOptions & { + withFileTypes?: false | undefined; + }) + | BufferEncoding + | null + ): string[] | Buffer[]; + /** + * Synchronous readdir(3) - read a directory. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param options If called with `withFileTypes: true` the result data will be an array of Dirent. + */ + export function readdirSync( + path: PathLike, + options: ObjectEncodingOptions & { + withFileTypes: true; + } + ): Dirent[]; + /** + * Closes the file descriptor. No arguments other than a possible exception are + * given to the completion callback. + * + * Calling `fs.close()` on any file descriptor (`fd`) that is currently in use + * through any other `fs` operation may lead to undefined behavior. + * + * See the POSIX [`close(2)`](http://man7.org/linux/man-pages/man2/close.2.html) documentation for more detail. + * @since v0.0.2 + */ + export function close(fd: number, callback?: NoParamCallback): void; + export namespace close { + /** + * Asynchronous close(2) - close a file descriptor. + * @param fd A file descriptor. + */ + function __promisify__(fd: number): Promise<void>; + } + /** + * Closes the file descriptor. Returns `undefined`. + * + * Calling `fs.closeSync()` on any file descriptor (`fd`) that is currently in use + * through any other `fs` operation may lead to undefined behavior. + * + * See the POSIX [`close(2)`](http://man7.org/linux/man-pages/man2/close.2.html) documentation for more detail. + * @since v0.1.21 + */ + export function closeSync(fd: number): void; + /** + * Asynchronous file open. See the POSIX [`open(2)`](http://man7.org/linux/man-pages/man2/open.2.html) documentation for more details. + * + * `mode` sets the file mode (permission and sticky bits), but only if the file was + * created. On Windows, only the write permission can be manipulated; see {@link chmod}. + * + * The callback gets two arguments `(err, fd)`. + * + * Some characters (`< > : " / \ | ? *`) are reserved under Windows as documented + * by [Naming Files, Paths, and Namespaces](https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file). Under NTFS, if the filename contains + * a colon, Node.js will open a file system stream, as described by [this MSDN page](https://docs.microsoft.com/en-us/windows/desktop/FileIO/using-streams). + * + * Functions based on `fs.open()` exhibit this behavior as well:`fs.writeFile()`, `fs.readFile()`, etc. + * @since v0.0.2 + * @param [flags='r'] See `support of file system `flags``. + * @param [mode=0o666] + */ + export function open(path: PathLike, flags: OpenMode | undefined, mode: Mode | undefined | null, callback: (err: NodeJS.ErrnoException | null, fd: number) => void): void; + /** + * Asynchronous open(2) - open and possibly create a file. If the file is created, its mode will be `0o666`. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param [flags='r'] See `support of file system `flags``. + */ + export function open(path: PathLike, flags: OpenMode | undefined, callback: (err: NodeJS.ErrnoException | null, fd: number) => void): void; + /** + * Asynchronous open(2) - open and possibly create a file. If the file is created, its mode will be `0o666`. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + */ + export function open(path: PathLike, callback: (err: NodeJS.ErrnoException | null, fd: number) => void): void; + + export namespace open { + /** + * Asynchronous open(2) - open and possibly create a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param mode A file mode. If a string is passed, it is parsed as an octal integer. If not supplied, defaults to `0o666`. + */ + function __promisify__(path: PathLike, flags: OpenMode, mode?: Mode | null): Promise<number>; + } + /** + * Returns an integer representing the file descriptor. + * + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link open}. + * @since v0.1.21 + * @param [flags='r'] + * @param [mode=0o666] + */ + export function openSync(path: PathLike, flags: OpenMode, mode?: Mode | null): number; + /** + * Change the file system timestamps of the object referenced by `path`. + * + * The `atime` and `mtime` arguments follow these rules: + * + * * Values can be either numbers representing Unix epoch time in seconds,`Date`s, or a numeric string like `'123456789.0'`. + * * If the value can not be converted to a number, or is `NaN`, `Infinity` or`-Infinity`, an `Error` will be thrown. + * @since v0.4.2 + */ + export function utimes(path: PathLike, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void; + export namespace utimes { + /** + * Asynchronously change file timestamps of the file referenced by the supplied path. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * @param atime The last access time. If a string is provided, it will be coerced to number. + * @param mtime The last modified time. If a string is provided, it will be coerced to number. + */ + function __promisify__(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>; + } + /** + * Returns `undefined`. + * + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link utimes}. + * @since v0.4.2 + */ + export function utimesSync(path: PathLike, atime: TimeLike, mtime: TimeLike): void; + /** + * Change the file system timestamps of the object referenced by the supplied file + * descriptor. See {@link utimes}. + * @since v0.4.2 + */ + export function futimes(fd: number, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void; + export namespace futimes { + /** + * Asynchronously change file timestamps of the file referenced by the supplied file descriptor. + * @param fd A file descriptor. + * @param atime The last access time. If a string is provided, it will be coerced to number. + * @param mtime The last modified time. If a string is provided, it will be coerced to number. + */ + function __promisify__(fd: number, atime: TimeLike, mtime: TimeLike): Promise<void>; + } + /** + * Synchronous version of {@link futimes}. Returns `undefined`. + * @since v0.4.2 + */ + export function futimesSync(fd: number, atime: TimeLike, mtime: TimeLike): void; + /** + * Request that all data for the open file descriptor is flushed to the storage + * device. The specific implementation is operating system and device specific. + * Refer to the POSIX [`fsync(2)`](http://man7.org/linux/man-pages/man2/fsync.2.html) documentation for more detail. No arguments other + * than a possible exception are given to the completion callback. + * @since v0.1.96 + */ + export function fsync(fd: number, callback: NoParamCallback): void; + export namespace fsync { + /** + * Asynchronous fsync(2) - synchronize a file's in-core state with the underlying storage device. + * @param fd A file descriptor. + */ + function __promisify__(fd: number): Promise<void>; + } + /** + * Request that all data for the open file descriptor is flushed to the storage + * device. The specific implementation is operating system and device specific. + * Refer to the POSIX [`fsync(2)`](http://man7.org/linux/man-pages/man2/fsync.2.html) documentation for more detail. Returns `undefined`. + * @since v0.1.96 + */ + export function fsyncSync(fd: number): void; + /** + * Write `buffer` to the file specified by `fd`. + * + * `offset` determines the part of the buffer to be written, and `length` is + * an integer specifying the number of bytes to write. + * + * `position` refers to the offset from the beginning of the file where this data + * should be written. If `typeof position !== 'number'`, the data will be written + * at the current position. See [`pwrite(2)`](http://man7.org/linux/man-pages/man2/pwrite.2.html). + * + * The callback will be given three arguments `(err, bytesWritten, buffer)` where`bytesWritten` specifies how many _bytes_ were written from `buffer`. + * + * If this method is invoked as its `util.promisify()` ed version, it returns + * a promise for an `Object` with `bytesWritten` and `buffer` properties. + * + * It is unsafe to use `fs.write()` multiple times on the same file without waiting + * for the callback. For this scenario, {@link createWriteStream} is + * recommended. + * + * On Linux, positional writes don't work when the file is opened in append mode. + * The kernel ignores the position argument and always appends the data to + * the end of the file. + * @since v0.0.2 + */ + export function write<TBuffer extends NodeJS.ArrayBufferView>( + fd: number, + buffer: TBuffer, + offset: number | undefined | null, + length: number | undefined | null, + position: number | undefined | null, + callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void + ): void; + /** + * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor. + * @param fd A file descriptor. + * @param offset The part of the buffer to be written. If not supplied, defaults to `0`. + * @param length The number of bytes to write. If not supplied, defaults to `buffer.length - offset`. + */ + export function write<TBuffer extends NodeJS.ArrayBufferView>( + fd: number, + buffer: TBuffer, + offset: number | undefined | null, + length: number | undefined | null, + callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void + ): void; + /** + * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor. + * @param fd A file descriptor. + * @param offset The part of the buffer to be written. If not supplied, defaults to `0`. + */ + export function write<TBuffer extends NodeJS.ArrayBufferView>( + fd: number, + buffer: TBuffer, + offset: number | undefined | null, + callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void + ): void; + /** + * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor. + * @param fd A file descriptor. + */ + export function write<TBuffer extends NodeJS.ArrayBufferView>(fd: number, buffer: TBuffer, callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void): void; + /** + * Asynchronously writes `string` to the file referenced by the supplied file descriptor. + * @param fd A file descriptor. + * @param string A string to write. + * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position. + * @param encoding The expected string encoding. + */ + export function write( + fd: number, + string: string, + position: number | undefined | null, + encoding: BufferEncoding | undefined | null, + callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void + ): void; + /** + * Asynchronously writes `string` to the file referenced by the supplied file descriptor. + * @param fd A file descriptor. + * @param string A string to write. + * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position. + */ + export function write(fd: number, string: string, position: number | undefined | null, callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void): void; + /** + * Asynchronously writes `string` to the file referenced by the supplied file descriptor. + * @param fd A file descriptor. + * @param string A string to write. + */ + export function write(fd: number, string: string, callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void): void; + export namespace write { + /** + * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor. + * @param fd A file descriptor. + * @param offset The part of the buffer to be written. If not supplied, defaults to `0`. + * @param length The number of bytes to write. If not supplied, defaults to `buffer.length - offset`. + * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position. + */ + function __promisify__<TBuffer extends NodeJS.ArrayBufferView>( + fd: number, + buffer?: TBuffer, + offset?: number, + length?: number, + position?: number | null + ): Promise<{ + bytesWritten: number; + buffer: TBuffer; + }>; + /** + * Asynchronously writes `string` to the file referenced by the supplied file descriptor. + * @param fd A file descriptor. + * @param string A string to write. + * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position. + * @param encoding The expected string encoding. + */ + function __promisify__( + fd: number, + string: string, + position?: number | null, + encoding?: BufferEncoding | null + ): Promise<{ + bytesWritten: number; + buffer: string; + }>; + } + /** + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link write}. + * @since v0.1.21 + * @return The number of bytes written. + */ + export function writeSync(fd: number, buffer: NodeJS.ArrayBufferView, offset?: number | null, length?: number | null, position?: number | null): number; + /** + * Synchronously writes `string` to the file referenced by the supplied file descriptor, returning the number of bytes written. + * @param fd A file descriptor. + * @param string A string to write. + * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position. + * @param encoding The expected string encoding. + */ + export function writeSync(fd: number, string: string, position?: number | null, encoding?: BufferEncoding | null): number; + export type ReadPosition = number | bigint; + export interface ReadSyncOptions { + /** + * @default 0 + */ + offset?: number | undefined; + /** + * @default `length of buffer` + */ + length?: number | undefined; + /** + * @default null + */ + position?: ReadPosition | null | undefined; + } + export interface ReadAsyncOptions<TBuffer extends NodeJS.ArrayBufferView> extends ReadSyncOptions { + buffer?: TBuffer; + } + /** + * Read data from the file specified by `fd`. + * + * The callback is given the three arguments, `(err, bytesRead, buffer)`. + * + * If the file is not modified concurrently, the end-of-file is reached when the + * number of bytes read is zero. + * + * If this method is invoked as its `util.promisify()` ed version, it returns + * a promise for an `Object` with `bytesRead` and `buffer` properties. + * @since v0.0.2 + * @param buffer The buffer that the data will be written to. + * @param offset The position in `buffer` to write the data to. + * @param length The number of bytes to read. + * @param position Specifies where to begin reading from in the file. If `position` is `null` or `-1 `, data will be read from the current file position, and the file position will be updated. If + * `position` is an integer, the file position will be unchanged. + */ + export function read<TBuffer extends NodeJS.ArrayBufferView>( + fd: number, + buffer: TBuffer, + offset: number, + length: number, + position: ReadPosition | null, + callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void + ): void; + /** + * Similar to the above `fs.read` function, this version takes an optional `options` object. + * If not otherwise specified in an `options` object, + * `buffer` defaults to `Buffer.alloc(16384)`, + * `offset` defaults to `0`, + * `length` defaults to `buffer.byteLength`, `- offset` as of Node 17.6.0 + * `position` defaults to `null` + * @since v12.17.0, 13.11.0 + */ + export function read<TBuffer extends NodeJS.ArrayBufferView>( + fd: number, + options: ReadAsyncOptions<TBuffer>, + callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void + ): void; + export function read(fd: number, callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: NodeJS.ArrayBufferView) => void): void; + export namespace read { + /** + * @param fd A file descriptor. + * @param buffer The buffer that the data will be written to. + * @param offset The offset in the buffer at which to start writing. + * @param length The number of bytes to read. + * @param position The offset from the beginning of the file from which data should be read. If `null`, data will be read from the current position. + */ + function __promisify__<TBuffer extends NodeJS.ArrayBufferView>( + fd: number, + buffer: TBuffer, + offset: number, + length: number, + position: number | null + ): Promise<{ + bytesRead: number; + buffer: TBuffer; + }>; + function __promisify__<TBuffer extends NodeJS.ArrayBufferView>( + fd: number, + options: ReadAsyncOptions<TBuffer> + ): Promise<{ + bytesRead: number; + buffer: TBuffer; + }>; + function __promisify__(fd: number): Promise<{ + bytesRead: number; + buffer: NodeJS.ArrayBufferView; + }>; + } + /** + * Returns the number of `bytesRead`. + * + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link read}. + * @since v0.1.21 + */ + export function readSync(fd: number, buffer: NodeJS.ArrayBufferView, offset: number, length: number, position: ReadPosition | null): number; + /** + * Similar to the above `fs.readSync` function, this version takes an optional `options` object. + * If no `options` object is specified, it will default with the above values. + */ + export function readSync(fd: number, buffer: NodeJS.ArrayBufferView, opts?: ReadSyncOptions): number; + /** + * Asynchronously reads the entire contents of a file. + * + * ```js + * import { readFile } from 'fs'; + * + * readFile('/etc/passwd', (err, data) => { + * if (err) throw err; + * console.log(data); + * }); + * ``` + * + * The callback is passed two arguments `(err, data)`, where `data` is the + * contents of the file. + * + * If no encoding is specified, then the raw buffer is returned. + * + * If `options` is a string, then it specifies the encoding: + * + * ```js + * import { readFile } from 'fs'; + * + * readFile('/etc/passwd', 'utf8', callback); + * ``` + * + * When the path is a directory, the behavior of `fs.readFile()` and {@link readFileSync} is platform-specific. On macOS, Linux, and Windows, an + * error will be returned. On FreeBSD, a representation of the directory's contents + * will be returned. + * + * ```js + * import { readFile } from 'fs'; + * + * // macOS, Linux, and Windows + * readFile('<directory>', (err, data) => { + * // => [Error: EISDIR: illegal operation on a directory, read <directory>] + * }); + * + * // FreeBSD + * readFile('<directory>', (err, data) => { + * // => null, <data> + * }); + * ``` + * + * It is possible to abort an ongoing request using an `AbortSignal`. If a + * request is aborted the callback is called with an `AbortError`: + * + * ```js + * import { readFile } from 'fs'; + * + * const controller = new AbortController(); + * const signal = controller.signal; + * readFile(fileInfo[0].name, { signal }, (err, buf) => { + * // ... + * }); + * // When you want to abort the request + * controller.abort(); + * ``` + * + * The `fs.readFile()` function buffers the entire file. To minimize memory costs, + * when possible prefer streaming via `fs.createReadStream()`. + * + * Aborting an ongoing request does not abort individual operating + * system requests but rather the internal buffering `fs.readFile` performs. + * @since v0.1.29 + * @param path filename or file descriptor + */ + export function readFile( + path: PathOrFileDescriptor, + options: + | ({ + encoding?: null | undefined; + flag?: string | undefined; + } & Abortable) + | undefined + | null, + callback: (err: NodeJS.ErrnoException | null, data: Buffer) => void + ): void; + /** + * Asynchronously reads the entire contents of a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag. + * If a flag is not provided, it defaults to `'r'`. + */ + export function readFile( + path: PathOrFileDescriptor, + options: + | ({ + encoding: BufferEncoding; + flag?: string | undefined; + } & Abortable) + | BufferEncoding, + callback: (err: NodeJS.ErrnoException | null, data: string) => void + ): void; + /** + * Asynchronously reads the entire contents of a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag. + * If a flag is not provided, it defaults to `'r'`. + */ + export function readFile( + path: PathOrFileDescriptor, + options: + | (ObjectEncodingOptions & { + flag?: string | undefined; + } & Abortable) + | BufferEncoding + | undefined + | null, + callback: (err: NodeJS.ErrnoException | null, data: string | Buffer) => void + ): void; + /** + * Asynchronously reads the entire contents of a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + */ + export function readFile(path: PathOrFileDescriptor, callback: (err: NodeJS.ErrnoException | null, data: Buffer) => void): void; + export namespace readFile { + /** + * Asynchronously reads the entire contents of a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param options An object that may contain an optional flag. + * If a flag is not provided, it defaults to `'r'`. + */ + function __promisify__( + path: PathOrFileDescriptor, + options?: { + encoding?: null | undefined; + flag?: string | undefined; + } | null + ): Promise<Buffer>; + /** + * Asynchronously reads the entire contents of a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * URL support is _experimental_. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag. + * If a flag is not provided, it defaults to `'r'`. + */ + function __promisify__( + path: PathOrFileDescriptor, + options: + | { + encoding: BufferEncoding; + flag?: string | undefined; + } + | BufferEncoding + ): Promise<string>; + /** + * Asynchronously reads the entire contents of a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * URL support is _experimental_. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag. + * If a flag is not provided, it defaults to `'r'`. + */ + function __promisify__( + path: PathOrFileDescriptor, + options?: + | (ObjectEncodingOptions & { + flag?: string | undefined; + }) + | BufferEncoding + | null + ): Promise<string | Buffer>; + } + /** + * Returns the contents of the `path`. + * + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link readFile}. + * + * If the `encoding` option is specified then this function returns a + * string. Otherwise it returns a buffer. + * + * Similar to {@link readFile}, when the path is a directory, the behavior of`fs.readFileSync()` is platform-specific. + * + * ```js + * import { readFileSync } from 'fs'; + * + * // macOS, Linux, and Windows + * readFileSync('<directory>'); + * // => [Error: EISDIR: illegal operation on a directory, read <directory>] + * + * // FreeBSD + * readFileSync('<directory>'); // => <data> + * ``` + * @since v0.1.8 + * @param path filename or file descriptor + */ + export function readFileSync( + path: PathOrFileDescriptor, + options?: { + encoding?: null | undefined; + flag?: string | undefined; + } | null + ): Buffer; + /** + * Synchronously reads the entire contents of a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag. + * If a flag is not provided, it defaults to `'r'`. + */ + export function readFileSync( + path: PathOrFileDescriptor, + options: + | { + encoding: BufferEncoding; + flag?: string | undefined; + } + | BufferEncoding + ): string; + /** + * Synchronously reads the entire contents of a file. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag. + * If a flag is not provided, it defaults to `'r'`. + */ + export function readFileSync( + path: PathOrFileDescriptor, + options?: + | (ObjectEncodingOptions & { + flag?: string | undefined; + }) + | BufferEncoding + | null + ): string | Buffer; + export type WriteFileOptions = + | (ObjectEncodingOptions & + Abortable & { + mode?: Mode | undefined; + flag?: string | undefined; + }) + | BufferEncoding + | null; + /** + * When `file` is a filename, asynchronously writes data to the file, replacing the + * file if it already exists. `data` can be a string or a buffer. + * + * When `file` is a file descriptor, the behavior is similar to calling`fs.write()` directly (which is recommended). See the notes below on using + * a file descriptor. + * + * The `encoding` option is ignored if `data` is a buffer. + * + * The `mode` option only affects the newly created file. See {@link open} for more details. + * + * ```js + * import { writeFile } from 'fs'; + * import { Buffer } from 'buffer'; + * + * const data = new Uint8Array(Buffer.from('Hello Node.js')); + * writeFile('message.txt', data, (err) => { + * if (err) throw err; + * console.log('The file has been saved!'); + * }); + * ``` + * + * If `options` is a string, then it specifies the encoding: + * + * ```js + * import { writeFile } from 'fs'; + * + * writeFile('message.txt', 'Hello Node.js', 'utf8', callback); + * ``` + * + * It is unsafe to use `fs.writeFile()` multiple times on the same file without + * waiting for the callback. For this scenario, {@link createWriteStream} is + * recommended. + * + * Similarly to `fs.readFile` \- `fs.writeFile` is a convenience method that + * performs multiple `write` calls internally to write the buffer passed to it. + * For performance sensitive code consider using {@link createWriteStream}. + * + * It is possible to use an `AbortSignal` to cancel an `fs.writeFile()`. + * Cancelation is "best effort", and some amount of data is likely still + * to be written. + * + * ```js + * import { writeFile } from 'fs'; + * import { Buffer } from 'buffer'; + * + * const controller = new AbortController(); + * const { signal } = controller; + * const data = new Uint8Array(Buffer.from('Hello Node.js')); + * writeFile('message.txt', data, { signal }, (err) => { + * // When a request is aborted - the callback is called with an AbortError + * }); + * // When the request should be aborted + * controller.abort(); + * ``` + * + * Aborting an ongoing request does not abort individual operating + * system requests but rather the internal buffering `fs.writeFile` performs. + * @since v0.1.29 + * @param file filename or file descriptor + */ + export function writeFile(file: PathOrFileDescriptor, data: string | NodeJS.ArrayBufferView, options: WriteFileOptions, callback: NoParamCallback): void; + /** + * Asynchronously writes data to a file, replacing the file if it already exists. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string. + */ + export function writeFile(path: PathOrFileDescriptor, data: string | NodeJS.ArrayBufferView, callback: NoParamCallback): void; + export namespace writeFile { + /** + * Asynchronously writes data to a file, replacing the file if it already exists. + * @param path A path to a file. If a URL is provided, it must use the `file:` protocol. + * URL support is _experimental_. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string. + * @param options Either the encoding for the file, or an object optionally specifying the encoding, file mode, and flag. + * If `encoding` is not supplied, the default of `'utf8'` is used. + * If `mode` is not supplied, the default of `0o666` is used. + * If `mode` is a string, it is parsed as an octal integer. + * If `flag` is not supplied, the default of `'w'` is used. + */ + function __promisify__(path: PathOrFileDescriptor, data: string | NodeJS.ArrayBufferView, options?: WriteFileOptions): Promise<void>; + } + /** + * Returns `undefined`. + * + * The `mode` option only affects the newly created file. See {@link open} for more details. + * + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link writeFile}. + * @since v0.1.29 + * @param file filename or file descriptor + */ + export function writeFileSync(file: PathOrFileDescriptor, data: string | NodeJS.ArrayBufferView, options?: WriteFileOptions): void; + /** + * Asynchronously append data to a file, creating the file if it does not yet + * exist. `data` can be a string or a `Buffer`. + * + * The `mode` option only affects the newly created file. See {@link open} for more details. + * + * ```js + * import { appendFile } from 'fs'; + * + * appendFile('message.txt', 'data to append', (err) => { + * if (err) throw err; + * console.log('The "data to append" was appended to file!'); + * }); + * ``` + * + * If `options` is a string, then it specifies the encoding: + * + * ```js + * import { appendFile } from 'fs'; + * + * appendFile('message.txt', 'data to append', 'utf8', callback); + * ``` + * + * The `path` may be specified as a numeric file descriptor that has been opened + * for appending (using `fs.open()` or `fs.openSync()`). The file descriptor will + * not be closed automatically. + * + * ```js + * import { open, close, appendFile } from 'fs'; + * + * function closeFd(fd) { + * close(fd, (err) => { + * if (err) throw err; + * }); + * } + * + * open('message.txt', 'a', (err, fd) => { + * if (err) throw err; + * + * try { + * appendFile(fd, 'data to append', 'utf8', (err) => { + * closeFd(fd); + * if (err) throw err; + * }); + * } catch (err) { + * closeFd(fd); + * throw err; + * } + * }); + * ``` + * @since v0.6.7 + * @param path filename or file descriptor + */ + export function appendFile(path: PathOrFileDescriptor, data: string | Uint8Array, options: WriteFileOptions, callback: NoParamCallback): void; + /** + * Asynchronously append data to a file, creating the file if it does not exist. + * @param file A path to a file. If a URL is provided, it must use the `file:` protocol. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string. + */ + export function appendFile(file: PathOrFileDescriptor, data: string | Uint8Array, callback: NoParamCallback): void; + export namespace appendFile { + /** + * Asynchronously append data to a file, creating the file if it does not exist. + * @param file A path to a file. If a URL is provided, it must use the `file:` protocol. + * URL support is _experimental_. + * If a file descriptor is provided, the underlying file will _not_ be closed automatically. + * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string. + * @param options Either the encoding for the file, or an object optionally specifying the encoding, file mode, and flag. + * If `encoding` is not supplied, the default of `'utf8'` is used. + * If `mode` is not supplied, the default of `0o666` is used. + * If `mode` is a string, it is parsed as an octal integer. + * If `flag` is not supplied, the default of `'a'` is used. + */ + function __promisify__(file: PathOrFileDescriptor, data: string | Uint8Array, options?: WriteFileOptions): Promise<void>; + } + /** + * Synchronously append data to a file, creating the file if it does not yet + * exist. `data` can be a string or a `Buffer`. + * + * The `mode` option only affects the newly created file. See {@link open} for more details. + * + * ```js + * import { appendFileSync } from 'fs'; + * + * try { + * appendFileSync('message.txt', 'data to append'); + * console.log('The "data to append" was appended to file!'); + * } catch (err) { + * // Handle the error + * } + * ``` + * + * If `options` is a string, then it specifies the encoding: + * + * ```js + * import { appendFileSync } from 'fs'; + * + * appendFileSync('message.txt', 'data to append', 'utf8'); + * ``` + * + * The `path` may be specified as a numeric file descriptor that has been opened + * for appending (using `fs.open()` or `fs.openSync()`). The file descriptor will + * not be closed automatically. + * + * ```js + * import { openSync, closeSync, appendFileSync } from 'fs'; + * + * let fd; + * + * try { + * fd = openSync('message.txt', 'a'); + * appendFileSync(fd, 'data to append', 'utf8'); + * } catch (err) { + * // Handle the error + * } finally { + * if (fd !== undefined) + * closeSync(fd); + * } + * ``` + * @since v0.6.7 + * @param path filename or file descriptor + */ + export function appendFileSync(path: PathOrFileDescriptor, data: string | Uint8Array, options?: WriteFileOptions): void; + /** + * Watch for changes on `filename`. The callback `listener` will be called each + * time the file is accessed. + * + * The `options` argument may be omitted. If provided, it should be an object. The`options` object may contain a boolean named `persistent` that indicates + * whether the process should continue to run as long as files are being watched. + * The `options` object may specify an `interval` property indicating how often the + * target should be polled in milliseconds. + * + * The `listener` gets two arguments the current stat object and the previous + * stat object: + * + * ```js + * import { watchFile } from 'fs'; + * + * watchFile('message.text', (curr, prev) => { + * console.log(`the current mtime is: ${curr.mtime}`); + * console.log(`the previous mtime was: ${prev.mtime}`); + * }); + * ``` + * + * These stat objects are instances of `fs.Stat`. If the `bigint` option is `true`, + * the numeric values in these objects are specified as `BigInt`s. + * + * To be notified when the file was modified, not just accessed, it is necessary + * to compare `curr.mtimeMs` and `prev.mtimeMs`. + * + * When an `fs.watchFile` operation results in an `ENOENT` error, it + * will invoke the listener once, with all the fields zeroed (or, for dates, the + * Unix Epoch). If the file is created later on, the listener will be called + * again, with the latest stat objects. This is a change in functionality since + * v0.10. + * + * Using {@link watch} is more efficient than `fs.watchFile` and`fs.unwatchFile`. `fs.watch` should be used instead of `fs.watchFile` and`fs.unwatchFile` when possible. + * + * When a file being watched by `fs.watchFile()` disappears and reappears, + * then the contents of `previous` in the second callback event (the file's + * reappearance) will be the same as the contents of `previous` in the first + * callback event (its disappearance). + * + * This happens when: + * + * * the file is deleted, followed by a restore + * * the file is renamed and then renamed a second time back to its original name + * @since v0.1.31 + */ + export interface WatchFileOptions { + bigint?: boolean | undefined; + persistent?: boolean | undefined; + interval?: number | undefined; + } + /** + * Watch for changes on `filename`. The callback `listener` will be called each + * time the file is accessed. + * + * The `options` argument may be omitted. If provided, it should be an object. The`options` object may contain a boolean named `persistent` that indicates + * whether the process should continue to run as long as files are being watched. + * The `options` object may specify an `interval` property indicating how often the + * target should be polled in milliseconds. + * + * The `listener` gets two arguments the current stat object and the previous + * stat object: + * + * ```js + * import { watchFile } from 'fs'; + * + * watchFile('message.text', (curr, prev) => { + * console.log(`the current mtime is: ${curr.mtime}`); + * console.log(`the previous mtime was: ${prev.mtime}`); + * }); + * ``` + * + * These stat objects are instances of `fs.Stat`. If the `bigint` option is `true`, + * the numeric values in these objects are specified as `BigInt`s. + * + * To be notified when the file was modified, not just accessed, it is necessary + * to compare `curr.mtimeMs` and `prev.mtimeMs`. + * + * When an `fs.watchFile` operation results in an `ENOENT` error, it + * will invoke the listener once, with all the fields zeroed (or, for dates, the + * Unix Epoch). If the file is created later on, the listener will be called + * again, with the latest stat objects. This is a change in functionality since + * v0.10. + * + * Using {@link watch} is more efficient than `fs.watchFile` and`fs.unwatchFile`. `fs.watch` should be used instead of `fs.watchFile` and`fs.unwatchFile` when possible. + * + * When a file being watched by `fs.watchFile()` disappears and reappears, + * then the contents of `previous` in the second callback event (the file's + * reappearance) will be the same as the contents of `previous` in the first + * callback event (its disappearance). + * + * This happens when: + * + * * the file is deleted, followed by a restore + * * the file is renamed and then renamed a second time back to its original name + * @since v0.1.31 + */ + export function watchFile( + filename: PathLike, + options: + | (WatchFileOptions & { + bigint?: false | undefined; + }) + | undefined, + listener: (curr: Stats, prev: Stats) => void + ): StatWatcher; + export function watchFile( + filename: PathLike, + options: + | (WatchFileOptions & { + bigint: true; + }) + | undefined, + listener: (curr: BigIntStats, prev: BigIntStats) => void + ): StatWatcher; + /** + * Watch for changes on `filename`. The callback `listener` will be called each time the file is accessed. + * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol. + */ + export function watchFile(filename: PathLike, listener: (curr: Stats, prev: Stats) => void): StatWatcher; + /** + * Stop watching for changes on `filename`. If `listener` is specified, only that + * particular listener is removed. Otherwise, _all_ listeners are removed, + * effectively stopping watching of `filename`. + * + * Calling `fs.unwatchFile()` with a filename that is not being watched is a + * no-op, not an error. + * + * Using {@link watch} is more efficient than `fs.watchFile()` and`fs.unwatchFile()`. `fs.watch()` should be used instead of `fs.watchFile()`and `fs.unwatchFile()` when possible. + * @since v0.1.31 + * @param listener Optional, a listener previously attached using `fs.watchFile()` + */ + export function unwatchFile(filename: PathLike, listener?: (curr: Stats, prev: Stats) => void): void; + export interface WatchOptions extends Abortable { + encoding?: BufferEncoding | 'buffer' | undefined; + persistent?: boolean | undefined; + recursive?: boolean | undefined; + } + export type WatchEventType = 'rename' | 'change'; + export type WatchListener<T> = (event: WatchEventType, filename: T) => void; + /** + * Watch for changes on `filename`, where `filename` is either a file or a + * directory. + * + * The second argument is optional. If `options` is provided as a string, it + * specifies the `encoding`. Otherwise `options` should be passed as an object. + * + * The listener callback gets two arguments `(eventType, filename)`. `eventType`is either `'rename'` or `'change'`, and `filename` is the name of the file + * which triggered the event. + * + * On most platforms, `'rename'` is emitted whenever a filename appears or + * disappears in the directory. + * + * The listener callback is attached to the `'change'` event fired by `fs.FSWatcher`, but it is not the same thing as the `'change'` value of`eventType`. + * + * If a `signal` is passed, aborting the corresponding AbortController will close + * the returned `fs.FSWatcher`. + * @since v0.5.10 + * @param listener + */ + export function watch( + filename: PathLike, + options: + | (WatchOptions & { + encoding: 'buffer'; + }) + | 'buffer', + listener?: WatchListener<Buffer> + ): FSWatcher; + /** + * Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`. + * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol. + * @param options Either the encoding for the filename provided to the listener, or an object optionally specifying encoding, persistent, and recursive options. + * If `encoding` is not supplied, the default of `'utf8'` is used. + * If `persistent` is not supplied, the default of `true` is used. + * If `recursive` is not supplied, the default of `false` is used. + */ + export function watch(filename: PathLike, options?: WatchOptions | BufferEncoding | null, listener?: WatchListener<string>): FSWatcher; + /** + * Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`. + * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol. + * @param options Either the encoding for the filename provided to the listener, or an object optionally specifying encoding, persistent, and recursive options. + * If `encoding` is not supplied, the default of `'utf8'` is used. + * If `persistent` is not supplied, the default of `true` is used. + * If `recursive` is not supplied, the default of `false` is used. + */ + export function watch(filename: PathLike, options: WatchOptions | string, listener?: WatchListener<string | Buffer>): FSWatcher; + /** + * Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`. + * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol. + */ + export function watch(filename: PathLike, listener?: WatchListener<string>): FSWatcher; + /** + * Test whether or not the given path exists by checking with the file system. + * Then call the `callback` argument with either true or false: + * + * ```js + * import { exists } from 'fs'; + * + * exists('/etc/passwd', (e) => { + * console.log(e ? 'it exists' : 'no passwd!'); + * }); + * ``` + * + * **The parameters for this callback are not consistent with other Node.js** + * **callbacks.** Normally, the first parameter to a Node.js callback is an `err`parameter, optionally followed by other parameters. The `fs.exists()` callback + * has only one boolean parameter. This is one reason `fs.access()` is recommended + * instead of `fs.exists()`. + * + * Using `fs.exists()` to check for the existence of a file before calling`fs.open()`, `fs.readFile()` or `fs.writeFile()` is not recommended. Doing + * so introduces a race condition, since other processes may change the file's + * state between the two calls. Instead, user code should open/read/write the + * file directly and handle the error raised if the file does not exist. + * + * **write (NOT RECOMMENDED)** + * + * ```js + * import { exists, open, close } from 'fs'; + * + * exists('myfile', (e) => { + * if (e) { + * console.error('myfile already exists'); + * } else { + * open('myfile', 'wx', (err, fd) => { + * if (err) throw err; + * + * try { + * writeMyData(fd); + * } finally { + * close(fd, (err) => { + * if (err) throw err; + * }); + * } + * }); + * } + * }); + * ``` + * + * **write (RECOMMENDED)** + * + * ```js + * import { open, close } from 'fs'; + * open('myfile', 'wx', (err, fd) => { + * if (err) { + * if (err.code === 'EEXIST') { + * console.error('myfile already exists'); + * return; + * } + * + * throw err; + * } + * + * try { + * writeMyData(fd); + * } finally { + * close(fd, (err) => { + * if (err) throw err; + * }); + * } + * }); + * ``` + * + * **read (NOT RECOMMENDED)** + * + * ```js + * import { open, close, exists } from 'fs'; + * + * exists('myfile', (e) => { + * if (e) { + * open('myfile', 'r', (err, fd) => { + * if (err) throw err; + * + * try { + * readMyData(fd); + * } finally { + * close(fd, (err) => { + * if (err) throw err; + * }); + * } + * }); + * } else { + * console.error('myfile does not exist'); + * } + * }); + * ``` + * + * **read (RECOMMENDED)** + * + * ```js + * import { open, close } from 'fs'; + * + * open('myfile', 'r', (err, fd) => { + * if (err) { + * if (err.code === 'ENOENT') { + * console.error('myfile does not exist'); + * return; + * } + * + * throw err; + * } + * + * try { + * readMyData(fd); + * } finally { + * close(fd, (err) => { + * if (err) throw err; + * }); + * } + * }); + * ``` + * + * The "not recommended" examples above check for existence and then use the + * file; the "recommended" examples are better because they use the file directly + * and handle the error, if any. + * + * In general, check for the existence of a file only if the file won’t be + * used directly, for example when its existence is a signal from another + * process. + * @since v0.0.2 + * @deprecated Since v1.0.0 - Use {@link stat} or {@link access} instead. + */ + export function exists(path: PathLike, callback: (exists: boolean) => void): void; + /** @deprecated */ + export namespace exists { + /** + * @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol. + * URL support is _experimental_. + */ + function __promisify__(path: PathLike): Promise<boolean>; + } + /** + * Returns `true` if the path exists, `false` otherwise. + * + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link exists}. + * + * `fs.exists()` is deprecated, but `fs.existsSync()` is not. The `callback`parameter to `fs.exists()` accepts parameters that are inconsistent with other + * Node.js callbacks. `fs.existsSync()` does not use a callback. + * + * ```js + * import { existsSync } from 'fs'; + * + * if (existsSync('/etc/passwd')) + * console.log('The path exists.'); + * ``` + * @since v0.1.21 + */ + export function existsSync(path: PathLike): boolean; + export namespace constants { + // File Access Constants + /** Constant for fs.access(). File is visible to the calling process. */ + const F_OK: number; + /** Constant for fs.access(). File can be read by the calling process. */ + const R_OK: number; + /** Constant for fs.access(). File can be written by the calling process. */ + const W_OK: number; + /** Constant for fs.access(). File can be executed by the calling process. */ + const X_OK: number; + // File Copy Constants + /** Constant for fs.copyFile. Flag indicating the destination file should not be overwritten if it already exists. */ + const COPYFILE_EXCL: number; + /** + * Constant for fs.copyFile. copy operation will attempt to create a copy-on-write reflink. + * If the underlying platform does not support copy-on-write, then a fallback copy mechanism is used. + */ + const COPYFILE_FICLONE: number; + /** + * Constant for fs.copyFile. Copy operation will attempt to create a copy-on-write reflink. + * If the underlying platform does not support copy-on-write, then the operation will fail with an error. + */ + const COPYFILE_FICLONE_FORCE: number; + // File Open Constants + /** Constant for fs.open(). Flag indicating to open a file for read-only access. */ + const O_RDONLY: number; + /** Constant for fs.open(). Flag indicating to open a file for write-only access. */ + const O_WRONLY: number; + /** Constant for fs.open(). Flag indicating to open a file for read-write access. */ + const O_RDWR: number; + /** Constant for fs.open(). Flag indicating to create the file if it does not already exist. */ + const O_CREAT: number; + /** Constant for fs.open(). Flag indicating that opening a file should fail if the O_CREAT flag is set and the file already exists. */ + const O_EXCL: number; + /** + * Constant for fs.open(). Flag indicating that if path identifies a terminal device, + * opening the path shall not cause that terminal to become the controlling terminal for the process + * (if the process does not already have one). + */ + const O_NOCTTY: number; + /** Constant for fs.open(). Flag indicating that if the file exists and is a regular file, and the file is opened successfully for write access, its length shall be truncated to zero. */ + const O_TRUNC: number; + /** Constant for fs.open(). Flag indicating that data will be appended to the end of the file. */ + const O_APPEND: number; + /** Constant for fs.open(). Flag indicating that the open should fail if the path is not a directory. */ + const O_DIRECTORY: number; + /** + * constant for fs.open(). + * Flag indicating reading accesses to the file system will no longer result in + * an update to the atime information associated with the file. + * This flag is available on Linux operating systems only. + */ + const O_NOATIME: number; + /** Constant for fs.open(). Flag indicating that the open should fail if the path is a symbolic link. */ + const O_NOFOLLOW: number; + /** Constant for fs.open(). Flag indicating that the file is opened for synchronous I/O. */ + const O_SYNC: number; + /** Constant for fs.open(). Flag indicating that the file is opened for synchronous I/O with write operations waiting for data integrity. */ + const O_DSYNC: number; + /** Constant for fs.open(). Flag indicating to open the symbolic link itself rather than the resource it is pointing to. */ + const O_SYMLINK: number; + /** Constant for fs.open(). When set, an attempt will be made to minimize caching effects of file I/O. */ + const O_DIRECT: number; + /** Constant for fs.open(). Flag indicating to open the file in nonblocking mode when possible. */ + const O_NONBLOCK: number; + // File Type Constants + /** Constant for fs.Stats mode property for determining a file's type. Bit mask used to extract the file type code. */ + const S_IFMT: number; + /** Constant for fs.Stats mode property for determining a file's type. File type constant for a regular file. */ + const S_IFREG: number; + /** Constant for fs.Stats mode property for determining a file's type. File type constant for a directory. */ + const S_IFDIR: number; + /** Constant for fs.Stats mode property for determining a file's type. File type constant for a character-oriented device file. */ + const S_IFCHR: number; + /** Constant for fs.Stats mode property for determining a file's type. File type constant for a block-oriented device file. */ + const S_IFBLK: number; + /** Constant for fs.Stats mode property for determining a file's type. File type constant for a FIFO/pipe. */ + const S_IFIFO: number; + /** Constant for fs.Stats mode property for determining a file's type. File type constant for a symbolic link. */ + const S_IFLNK: number; + /** Constant for fs.Stats mode property for determining a file's type. File type constant for a socket. */ + const S_IFSOCK: number; + // File Mode Constants + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by owner. */ + const S_IRWXU: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by owner. */ + const S_IRUSR: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by owner. */ + const S_IWUSR: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by owner. */ + const S_IXUSR: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by group. */ + const S_IRWXG: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by group. */ + const S_IRGRP: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by group. */ + const S_IWGRP: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by group. */ + const S_IXGRP: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by others. */ + const S_IRWXO: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by others. */ + const S_IROTH: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by others. */ + const S_IWOTH: number; + /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by others. */ + const S_IXOTH: number; + /** + * When set, a memory file mapping is used to access the file. This flag + * is available on Windows operating systems only. On other operating systems, + * this flag is ignored. + */ + const UV_FS_O_FILEMAP: number; + } + /** + * Tests a user's permissions for the file or directory specified by `path`. + * The `mode` argument is an optional integer that specifies the accessibility + * checks to be performed. `mode` should be either the value `fs.constants.F_OK`or a mask consisting of the bitwise OR of any of `fs.constants.R_OK`,`fs.constants.W_OK`, and `fs.constants.X_OK` + * (e.g.`fs.constants.W_OK | fs.constants.R_OK`). Check `File access constants` for + * possible values of `mode`. + * + * The final argument, `callback`, is a callback function that is invoked with + * a possible error argument. If any of the accessibility checks fail, the error + * argument will be an `Error` object. The following examples check if`package.json` exists, and if it is readable or writable. + * + * ```js + * import { access, constants } from 'fs'; + * + * const file = 'package.json'; + * + * // Check if the file exists in the current directory. + * access(file, constants.F_OK, (err) => { + * console.log(`${file} ${err ? 'does not exist' : 'exists'}`); + * }); + * + * // Check if the file is readable. + * access(file, constants.R_OK, (err) => { + * console.log(`${file} ${err ? 'is not readable' : 'is readable'}`); + * }); + * + * // Check if the file is writable. + * access(file, constants.W_OK, (err) => { + * console.log(`${file} ${err ? 'is not writable' : 'is writable'}`); + * }); + * + * // Check if the file is readable and writable. + * access(file, constants.R_OK | constants.W_OK, (err) => { + * console.log(`${file} ${err ? 'is not' : 'is'} readable and writable`); + * }); + * ``` + * + * Do not use `fs.access()` to check for the accessibility of a file before calling`fs.open()`, `fs.readFile()` or `fs.writeFile()`. Doing + * so introduces a race condition, since other processes may change the file's + * state between the two calls. Instead, user code should open/read/write the + * file directly and handle the error raised if the file is not accessible. + * + * **write (NOT RECOMMENDED)** + * + * ```js + * import { access, open, close } from 'fs'; + * + * access('myfile', (err) => { + * if (!err) { + * console.error('myfile already exists'); + * return; + * } + * + * open('myfile', 'wx', (err, fd) => { + * if (err) throw err; + * + * try { + * writeMyData(fd); + * } finally { + * close(fd, (err) => { + * if (err) throw err; + * }); + * } + * }); + * }); + * ``` + * + * **write (RECOMMENDED)** + * + * ```js + * import { open, close } from 'fs'; + * + * open('myfile', 'wx', (err, fd) => { + * if (err) { + * if (err.code === 'EEXIST') { + * console.error('myfile already exists'); + * return; + * } + * + * throw err; + * } + * + * try { + * writeMyData(fd); + * } finally { + * close(fd, (err) => { + * if (err) throw err; + * }); + * } + * }); + * ``` + * + * **read (NOT RECOMMENDED)** + * + * ```js + * import { access, open, close } from 'fs'; + * access('myfile', (err) => { + * if (err) { + * if (err.code === 'ENOENT') { + * console.error('myfile does not exist'); + * return; + * } + * + * throw err; + * } + * + * open('myfile', 'r', (err, fd) => { + * if (err) throw err; + * + * try { + * readMyData(fd); + * } finally { + * close(fd, (err) => { + * if (err) throw err; + * }); + * } + * }); + * }); + * ``` + * + * **read (RECOMMENDED)** + * + * ```js + * import { open, close } from 'fs'; + * + * open('myfile', 'r', (err, fd) => { + * if (err) { + * if (err.code === 'ENOENT') { + * console.error('myfile does not exist'); + * return; + * } + * + * throw err; + * } + * + * try { + * readMyData(fd); + * } finally { + * close(fd, (err) => { + * if (err) throw err; + * }); + * } + * }); + * ``` + * + * The "not recommended" examples above check for accessibility and then use the + * file; the "recommended" examples are better because they use the file directly + * and handle the error, if any. + * + * In general, check for the accessibility of a file only if the file will not be + * used directly, for example when its accessibility is a signal from another + * process. + * + * On Windows, access-control policies (ACLs) on a directory may limit access to + * a file or directory. The `fs.access()` function, however, does not check the + * ACL and therefore may report that a path is accessible even if the ACL restricts + * the user from reading or writing to it. + * @since v0.11.15 + * @param [mode=fs.constants.F_OK] + */ + export function access(path: PathLike, mode: number | undefined, callback: NoParamCallback): void; + /** + * Asynchronously tests a user's permissions for the file specified by path. + * @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol. + */ + export function access(path: PathLike, callback: NoParamCallback): void; + export namespace access { + /** + * Asynchronously tests a user's permissions for the file specified by path. + * @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol. + * URL support is _experimental_. + */ + function __promisify__(path: PathLike, mode?: number): Promise<void>; + } + /** + * Synchronously tests a user's permissions for the file or directory specified + * by `path`. The `mode` argument is an optional integer that specifies the + * accessibility checks to be performed. `mode` should be either the value`fs.constants.F_OK` or a mask consisting of the bitwise OR of any of`fs.constants.R_OK`, `fs.constants.W_OK`, and + * `fs.constants.X_OK` (e.g.`fs.constants.W_OK | fs.constants.R_OK`). Check `File access constants` for + * possible values of `mode`. + * + * If any of the accessibility checks fail, an `Error` will be thrown. Otherwise, + * the method will return `undefined`. + * + * ```js + * import { accessSync, constants } from 'fs'; + * + * try { + * accessSync('etc/passwd', constants.R_OK | constants.W_OK); + * console.log('can read/write'); + * } catch (err) { + * console.error('no access!'); + * } + * ``` + * @since v0.11.15 + * @param [mode=fs.constants.F_OK] + */ + export function accessSync(path: PathLike, mode?: number): void; + interface StreamOptions { + flags?: string | undefined; + encoding?: BufferEncoding | undefined; + fd?: number | promises.FileHandle | undefined; + mode?: number | undefined; + autoClose?: boolean | undefined; + /** + * @default false + */ + emitClose?: boolean | undefined; + start?: number | undefined; + highWaterMark?: number | undefined; + } + interface ReadStreamOptions extends StreamOptions { + end?: number | undefined; + } + /** + * Unlike the 16 kb default `highWaterMark` for a `stream.Readable`, the stream + * returned by this method has a default `highWaterMark` of 64 kb. + * + * `options` can include `start` and `end` values to read a range of bytes from + * the file instead of the entire file. Both `start` and `end` are inclusive and + * start counting at 0, allowed values are in the + * \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. If `fd` is specified and `start` is + * omitted or `undefined`, `fs.createReadStream()` reads sequentially from the + * current file position. The `encoding` can be any one of those accepted by `Buffer`. + * + * If `fd` is specified, `ReadStream` will ignore the `path` argument and will use + * the specified file descriptor. This means that no `'open'` event will be + * emitted. `fd` should be blocking; non-blocking `fd`s should be passed to `net.Socket`. + * + * If `fd` points to a character device that only supports blocking reads + * (such as keyboard or sound card), read operations do not finish until data is + * available. This can prevent the process from exiting and the stream from + * closing naturally. + * + * By default, the stream will emit a `'close'` event after it has been + * destroyed. Set the `emitClose` option to `false` to change this behavior. + * + * By providing the `fs` option, it is possible to override the corresponding `fs`implementations for `open`, `read`, and `close`. When providing the `fs` option, + * an override for `read` is required. If no `fd` is provided, an override for`open` is also required. If `autoClose` is `true`, an override for `close` is + * also required. + * + * ```js + * import { createReadStream } from 'fs'; + * + * // Create a stream from some character device. + * const stream = createReadStream('/dev/input/event0'); + * setTimeout(() => { + * stream.close(); // This may not close the stream. + * // Artificially marking end-of-stream, as if the underlying resource had + * // indicated end-of-file by itself, allows the stream to close. + * // This does not cancel pending read operations, and if there is such an + * // operation, the process may still not be able to exit successfully + * // until it finishes. + * stream.push(null); + * stream.read(0); + * }, 100); + * ``` + * + * If `autoClose` is false, then the file descriptor won't be closed, even if + * there's an error. It is the application's responsibility to close it and make + * sure there's no file descriptor leak. If `autoClose` is set to true (default + * behavior), on `'error'` or `'end'` the file descriptor will be closed + * automatically. + * + * `mode` sets the file mode (permission and sticky bits), but only if the + * file was created. + * + * An example to read the last 10 bytes of a file which is 100 bytes long: + * + * ```js + * import { createReadStream } from 'fs'; + * + * createReadStream('sample.txt', { start: 90, end: 99 }); + * ``` + * + * If `options` is a string, then it specifies the encoding. + * @since v0.1.31 + */ + export function createReadStream(path: PathLike, options?: BufferEncoding | ReadStreamOptions): ReadStream; + /** + * `options` may also include a `start` option to allow writing data at some + * position past the beginning of the file, allowed values are in the + * \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. Modifying a file rather than + * replacing it may require the `flags` option to be set to `r+` rather than the + * default `w`. The `encoding` can be any one of those accepted by `Buffer`. + * + * If `autoClose` is set to true (default behavior) on `'error'` or `'finish'`the file descriptor will be closed automatically. If `autoClose` is false, + * then the file descriptor won't be closed, even if there's an error. + * It is the application's responsibility to close it and make sure there's no + * file descriptor leak. + * + * By default, the stream will emit a `'close'` event after it has been + * destroyed. Set the `emitClose` option to `false` to change this behavior. + * + * By providing the `fs` option it is possible to override the corresponding `fs`implementations for `open`, `write`, `writev` and `close`. Overriding `write()`without `writev()` can reduce + * performance as some optimizations (`_writev()`) + * will be disabled. When providing the `fs` option, overrides for at least one of`write` and `writev` are required. If no `fd` option is supplied, an override + * for `open` is also required. If `autoClose` is `true`, an override for `close`is also required. + * + * Like `fs.ReadStream`, if `fd` is specified, `fs.WriteStream` will ignore the`path` argument and will use the specified file descriptor. This means that no`'open'` event will be + * emitted. `fd` should be blocking; non-blocking `fd`s + * should be passed to `net.Socket`. + * + * If `options` is a string, then it specifies the encoding. + * @since v0.1.31 + */ + export function createWriteStream(path: PathLike, options?: BufferEncoding | StreamOptions): WriteStream; + /** + * Forces all currently queued I/O operations associated with the file to the + * operating system's synchronized I/O completion state. Refer to the POSIX [`fdatasync(2)`](http://man7.org/linux/man-pages/man2/fdatasync.2.html) documentation for details. No arguments other + * than a possible + * exception are given to the completion callback. + * @since v0.1.96 + */ + export function fdatasync(fd: number, callback: NoParamCallback): void; + export namespace fdatasync { + /** + * Asynchronous fdatasync(2) - synchronize a file's in-core state with storage device. + * @param fd A file descriptor. + */ + function __promisify__(fd: number): Promise<void>; + } + /** + * Forces all currently queued I/O operations associated with the file to the + * operating system's synchronized I/O completion state. Refer to the POSIX [`fdatasync(2)`](http://man7.org/linux/man-pages/man2/fdatasync.2.html) documentation for details. Returns `undefined`. + * @since v0.1.96 + */ + export function fdatasyncSync(fd: number): void; + /** + * Asynchronously copies `src` to `dest`. By default, `dest` is overwritten if it + * already exists. No arguments other than a possible exception are given to the + * callback function. Node.js makes no guarantees about the atomicity of the copy + * operation. If an error occurs after the destination file has been opened for + * writing, Node.js will attempt to remove the destination. + * + * `mode` is an optional integer that specifies the behavior + * of the copy operation. It is possible to create a mask consisting of the bitwise + * OR of two or more values (e.g.`fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE`). + * + * * `fs.constants.COPYFILE_EXCL`: The copy operation will fail if `dest` already + * exists. + * * `fs.constants.COPYFILE_FICLONE`: The copy operation will attempt to create a + * copy-on-write reflink. If the platform does not support copy-on-write, then a + * fallback copy mechanism is used. + * * `fs.constants.COPYFILE_FICLONE_FORCE`: The copy operation will attempt to + * create a copy-on-write reflink. If the platform does not support + * copy-on-write, then the operation will fail. + * + * ```js + * import { copyFile, constants } from 'fs'; + * + * function callback(err) { + * if (err) throw err; + * console.log('source.txt was copied to destination.txt'); + * } + * + * // destination.txt will be created or overwritten by default. + * copyFile('source.txt', 'destination.txt', callback); + * + * // By using COPYFILE_EXCL, the operation will fail if destination.txt exists. + * copyFile('source.txt', 'destination.txt', constants.COPYFILE_EXCL, callback); + * ``` + * @since v8.5.0 + * @param src source filename to copy + * @param dest destination filename of the copy operation + * @param [mode=0] modifiers for copy operation. + */ + export function copyFile(src: PathLike, dest: PathLike, callback: NoParamCallback): void; + export function copyFile(src: PathLike, dest: PathLike, mode: number, callback: NoParamCallback): void; + export namespace copyFile { + function __promisify__(src: PathLike, dst: PathLike, mode?: number): Promise<void>; + } + /** + * Synchronously copies `src` to `dest`. By default, `dest` is overwritten if it + * already exists. Returns `undefined`. Node.js makes no guarantees about the + * atomicity of the copy operation. If an error occurs after the destination file + * has been opened for writing, Node.js will attempt to remove the destination. + * + * `mode` is an optional integer that specifies the behavior + * of the copy operation. It is possible to create a mask consisting of the bitwise + * OR of two or more values (e.g.`fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE`). + * + * * `fs.constants.COPYFILE_EXCL`: The copy operation will fail if `dest` already + * exists. + * * `fs.constants.COPYFILE_FICLONE`: The copy operation will attempt to create a + * copy-on-write reflink. If the platform does not support copy-on-write, then a + * fallback copy mechanism is used. + * * `fs.constants.COPYFILE_FICLONE_FORCE`: The copy operation will attempt to + * create a copy-on-write reflink. If the platform does not support + * copy-on-write, then the operation will fail. + * + * ```js + * import { copyFileSync, constants } from 'fs'; + * + * // destination.txt will be created or overwritten by default. + * copyFileSync('source.txt', 'destination.txt'); + * console.log('source.txt was copied to destination.txt'); + * + * // By using COPYFILE_EXCL, the operation will fail if destination.txt exists. + * copyFileSync('source.txt', 'destination.txt', constants.COPYFILE_EXCL); + * ``` + * @since v8.5.0 + * @param src source filename to copy + * @param dest destination filename of the copy operation + * @param [mode=0] modifiers for copy operation. + */ + export function copyFileSync(src: PathLike, dest: PathLike, mode?: number): void; + /** + * Write an array of `ArrayBufferView`s to the file specified by `fd` using`writev()`. + * + * `position` is the offset from the beginning of the file where this data + * should be written. If `typeof position !== 'number'`, the data will be written + * at the current position. + * + * The callback will be given three arguments: `err`, `bytesWritten`, and`buffers`. `bytesWritten` is how many bytes were written from `buffers`. + * + * If this method is `util.promisify()` ed, it returns a promise for an`Object` with `bytesWritten` and `buffers` properties. + * + * It is unsafe to use `fs.writev()` multiple times on the same file without + * waiting for the callback. For this scenario, use {@link createWriteStream}. + * + * On Linux, positional writes don't work when the file is opened in append mode. + * The kernel ignores the position argument and always appends the data to + * the end of the file. + * @since v12.9.0 + */ + export function writev(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, cb: (err: NodeJS.ErrnoException | null, bytesWritten: number, buffers: NodeJS.ArrayBufferView[]) => void): void; + export function writev( + fd: number, + buffers: ReadonlyArray<NodeJS.ArrayBufferView>, + position: number, + cb: (err: NodeJS.ErrnoException | null, bytesWritten: number, buffers: NodeJS.ArrayBufferView[]) => void + ): void; + export interface WriteVResult { + bytesWritten: number; + buffers: NodeJS.ArrayBufferView[]; + } + export namespace writev { + function __promisify__(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): Promise<WriteVResult>; + } + /** + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link writev}. + * @since v12.9.0 + * @return The number of bytes written. + */ + export function writevSync(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): number; + /** + * Read from a file specified by `fd` and write to an array of `ArrayBufferView`s + * using `readv()`. + * + * `position` is the offset from the beginning of the file from where data + * should be read. If `typeof position !== 'number'`, the data will be read + * from the current position. + * + * The callback will be given three arguments: `err`, `bytesRead`, and`buffers`. `bytesRead` is how many bytes were read from the file. + * + * If this method is invoked as its `util.promisify()` ed version, it returns + * a promise for an `Object` with `bytesRead` and `buffers` properties. + * @since v13.13.0, v12.17.0 + */ + export function readv(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, cb: (err: NodeJS.ErrnoException | null, bytesRead: number, buffers: NodeJS.ArrayBufferView[]) => void): void; + export function readv( + fd: number, + buffers: ReadonlyArray<NodeJS.ArrayBufferView>, + position: number, + cb: (err: NodeJS.ErrnoException | null, bytesRead: number, buffers: NodeJS.ArrayBufferView[]) => void + ): void; + export interface ReadVResult { + bytesRead: number; + buffers: NodeJS.ArrayBufferView[]; + } + export namespace readv { + function __promisify__(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): Promise<ReadVResult>; + } + /** + * For detailed information, see the documentation of the asynchronous version of + * this API: {@link readv}. + * @since v13.13.0, v12.17.0 + * @return The number of bytes read. + */ + export function readvSync(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): number; + export interface OpenDirOptions { + encoding?: BufferEncoding | undefined; + /** + * Number of directory entries that are buffered + * internally when reading from the directory. Higher values lead to better + * performance but higher memory usage. + * @default 32 + */ + bufferSize?: number | undefined; + } + /** + * Synchronously open a directory. See [`opendir(3)`](http://man7.org/linux/man-pages/man3/opendir.3.html). + * + * Creates an `fs.Dir`, which contains all further functions for reading from + * and cleaning up the directory. + * + * The `encoding` option sets the encoding for the `path` while opening the + * directory and subsequent read operations. + * @since v12.12.0 + */ + export function opendirSync(path: PathLike, options?: OpenDirOptions): Dir; + /** + * Asynchronously open a directory. See the POSIX [`opendir(3)`](http://man7.org/linux/man-pages/man3/opendir.3.html) documentation for + * more details. + * + * Creates an `fs.Dir`, which contains all further functions for reading from + * and cleaning up the directory. + * + * The `encoding` option sets the encoding for the `path` while opening the + * directory and subsequent read operations. + * @since v12.12.0 + */ + export function opendir(path: PathLike, cb: (err: NodeJS.ErrnoException | null, dir: Dir) => void): void; + export function opendir(path: PathLike, options: OpenDirOptions, cb: (err: NodeJS.ErrnoException | null, dir: Dir) => void): void; + export namespace opendir { + function __promisify__(path: PathLike, options?: OpenDirOptions): Promise<Dir>; + } + export interface BigIntStats extends StatsBase<bigint> { + atimeNs: bigint; + mtimeNs: bigint; + ctimeNs: bigint; + birthtimeNs: bigint; + } + export interface BigIntOptions { + bigint: true; + } + export interface StatOptions { + bigint?: boolean | undefined; + } + export interface StatSyncOptions extends StatOptions { + throwIfNoEntry?: boolean | undefined; + } + interface CopyOptionsBase { + /** + * Dereference symlinks + * @default false + */ + dereference?: boolean; + /** + * When `force` is `false`, and the destination + * exists, throw an error. + * @default false + */ + errorOnExist?: boolean; + /** + * Overwrite existing file or directory. _The copy + * operation will ignore errors if you set this to false and the destination + * exists. Use the `errorOnExist` option to change this behavior. + * @default true + */ + force?: boolean; + /** + * When `true` timestamps from `src` will + * be preserved. + * @default false + */ + preserveTimestamps?: boolean; + /** + * Copy directories recursively. + * @default false + */ + recursive?: boolean; + /** + * When true, path resolution for symlinks will be skipped + * @default false + */ + verbatimSymlinks?: boolean; + } + export interface CopyOptions extends CopyOptionsBase { + /** + * Function to filter copied files/directories. Return + * `true` to copy the item, `false` to ignore it. + */ + filter?(source: string, destination: string): boolean | Promise<boolean>; + } + export interface CopySyncOptions extends CopyOptionsBase { + /** + * Function to filter copied files/directories. Return + * `true` to copy the item, `false` to ignore it. + */ + filter?(source: string, destination: string): boolean; + } + /** + * Asynchronously copies the entire directory structure from `src` to `dest`, + * including subdirectories and files. + * + * When copying a directory to another directory, globs are not supported and + * behavior is similar to `cp dir1/ dir2/`. + * @since v16.7.0 + * @experimental + * @param src source path to copy. + * @param dest destination path to copy to. + */ + export function cp(source: string | URL, destination: string | URL, callback: (err: NodeJS.ErrnoException | null) => void): void; + export function cp(source: string | URL, destination: string | URL, opts: CopyOptions, callback: (err: NodeJS.ErrnoException | null) => void): void; + /** + * Synchronously copies the entire directory structure from `src` to `dest`, + * including subdirectories and files. + * + * When copying a directory to another directory, globs are not supported and + * behavior is similar to `cp dir1/ dir2/`. + * @since v16.7.0 + * @experimental + * @param src source path to copy. + * @param dest destination path to copy to. + */ + export function cpSync(source: string | URL, destination: string | URL, opts?: CopySyncOptions): void; +} +declare module 'node:fs' { + export * from 'fs'; +} |