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File Content: `fs.d.ts`

declare module 'fs' {
    import * as stream from 'stream';
    import EventEmitter = require('events');
    import { URL } from 'url';

    /**
     * Valid types for path values in "fs".
     */
    type PathLike = string | Buffer | URL;

    type NoParamCallback = (err: NodeJS.ErrnoException | null) => void;

    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;
    }

    interface Stats extends StatsBase<number> {
    }

    class Stats {
    }

    class Dirent {
        isFile(): boolean;
        isDirectory(): boolean;
        isBlockDevice(): boolean;
        isCharacterDevice(): boolean;
        isSymbolicLink(): boolean;
        isFIFO(): boolean;
        isSocket(): boolean;
        name: string;
    }

    /**
     * A class representing a directory stream.
     */
    class Dir {
        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.
         */
        close(): Promise<void>;
        close(cb: NoParamCallback): void;

        /**
         * Synchronously close the directory's underlying resource handle.
         * Subsequent reads will result in errors.
         */
        closeSync(): void;

        /**
         * Asynchronously read the next directory entry via `readdir(3)` as an `Dirent`.
         * After the read is completed, a value is returned that will be resolved with an `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.
         */
        read(): Promise<Dirent | null>;
        read(cb: (err: NodeJS.ErrnoException | null, dirEnt: Dirent | null) => void): void;

        /**
         * Synchronously read the next directory entry via `readdir(3)` as a `Dirent`.
         * 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.
         */
        readSync(): Dirent;
    }

    interface FSWatcher extends EventEmitter {
        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;
    }

    class ReadStream extends stream.Readable {
        close(callback?: (err?: NodeJS.ErrnoException | null) => void): void;
        bytesRead: number;
        path: string | Buffer;

        /**
         * events.EventEmitter
         *   1. open
         *   2. close
         */
        addListener(event: string, listener: (...args: any[]) => void): this;
        addListener(event: "open", listener: (fd: number) => void): this;
        addListener(event: "close", listener: () => void): this;

        on(event: string, listener: (...args: any[]) => void): this;
        on(event: "open", listener: (fd: number) => void): this;
        on(event: "close", listener: () => void): this;

        once(event: string, listener: (...args: any[]) => void): this;
        once(event: "open", listener: (fd: number) => void): this;
        once(event: "close", listener: () => void): this;

        prependListener(event: string, listener: (...args: any[]) => void): this;
        prependListener(event: "open", listener: (fd: number) => void): this;
        prependListener(event: "close", listener: () => void): this;

        prependOnceListener(event: string, listener: (...args: any[]) => void): this;
        prependOnceListener(event: "open", listener: (fd: number) => void): this;
        prependOnceListener(event: "close", listener: () => void): this;
    }

    class WriteStream extends stream.Writable {
        close(callback?: (err?: NodeJS.ErrnoException | null) => void): void;
        bytesWritten: number;
        path: string | Buffer;

        /**
         * events.EventEmitter
         *   1. open
         *   2. close
         */
        addListener(event: string, listener: (...args: any[]) => void): this;
        addListener(event: "open", listener: (fd: number) => void): this;
        addListener(event: "close", listener: () => void): this;

        on(event: string, listener: (...args: any[]) => void): this;
        on(event: "open", listener: (fd: number) => void): this;
        on(event: "close", listener: () => void): this;

        once(event: string, listener: (...args: any[]) => void): this;
        once(event: "open", listener: (fd: number) => void): this;
        once(event: "close", listener: () => void): this;

        prependListener(event: string, listener: (...args: any[]) => void): this;
        prependListener(event: "open", listener: (fd: number) => void): this;
        prependListener(event: "close", listener: () => void): this;

        prependOnceListener(event: string, listener: (...args: any[]) => void): this;
        prependOnceListener(event: "open", listener: (fd: number) => void): this;
        prependOnceListener(event: "close", listener: () => void): this;
    }

    /**
     * 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 rename(oldPath: PathLike, newPath: PathLike, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous 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 renameSync(oldPath: PathLike, newPath: PathLike): 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.
     * @param len If not specified, defaults to `0`.
     */
    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.
     * URL support is _experimental_.
     */
    function truncate(path: PathLike, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous 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 truncateSync(path: PathLike, len?: number | null): void;

    /**
     * Asynchronous ftruncate(2) - Truncate a file to a specified length.
     * @param fd A file descriptor.
     * @param len If not specified, defaults to `0`.
     */
    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.
     */
    function ftruncate(fd: number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous ftruncate(2) - Truncate a file to a specified length.
     * @param fd A file descriptor.
     * @param len If not specified, defaults to `0`.
     */
    function ftruncateSync(fd: number, len?: number | null): void;

    /**
     * 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 chown(path: PathLike, uid: number, gid: number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous 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 chownSync(path: PathLike, uid: number, gid: number): void;

    /**
     * Asynchronous fchown(2) - Change ownership of a file.
     * @param fd A file descriptor.
     */
    function fchown(fd: number, uid: number, gid: number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous fchown(2) - Change ownership of a file.
     * @param fd A file descriptor.
     */
    function fchownSync(fd: number, uid: number, gid: number): void;

    /**
     * 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 lchown(path: PathLike, uid: number, gid: number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous 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 lchownSync(path: PathLike, uid: number, gid: number): void;

    /**
     * Changes the access and modification times of a file in the same way as `fs.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 lutimes(path: PathLike, atime: string | number | Date, mtime: string | number | Date, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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: string | number | Date, mtime: string | number | Date): 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 `fs.lutimes()`.
     * @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 lutimesSync(path: PathLike, atime: string | number | Date, mtime: string | number | Date): void;

    /**
     * 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 chmod(path: PathLike, mode: string | number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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: string | number): Promise<void>;
    }

    /**
     * Synchronous 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 chmodSync(path: PathLike, mode: string | number): void;

    /**
     * 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 fchmod(fd: number, mode: string | number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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: string | number): Promise<void>;
    }

    /**
     * Synchronous 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 fchmodSync(fd: number, mode: string | number): void;

    /**
     * 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 lchmod(path: PathLike, mode: string | number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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: string | number): Promise<void>;
    }

    /**
     * Synchronous 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 lchmodSync(path: PathLike, mode: string | number): void;

    /**
     * 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 stat(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
    function stat(path: PathLike, options: StatOptions & { bigint?: false | undefined } | undefined, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
    function stat(path: PathLike, options: StatOptions & { bigint: true }, callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void): void;
    function stat(path: PathLike, options: StatOptions | undefined, callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous stat(2) - Get file status.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     */
    function statSync(path: PathLike, options?: StatOptions & { bigint?: false | undefined }): Stats;
    function statSync(path: PathLike, options: StatOptions & { bigint: true }): BigIntStats;
    function statSync(path: PathLike, options?: StatOptions): Stats | BigIntStats;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous fstat(2) - Get file status.
     * @param fd A file descriptor.
     */
    function fstatSync(fd: number, options?: StatOptions & { bigint?: false | undefined }): Stats;
    function fstatSync(fd: number, options: StatOptions & { bigint: true }): BigIntStats;
    function fstatSync(fd: number, options?: StatOptions): Stats | BigIntStats;

    /**
     * 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 lstat(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
    function lstat(path: PathLike, options: StatOptions & { bigint?: false | undefined } | undefined, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
    function lstat(path: PathLike, options: StatOptions & { bigint: true }, callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void): void;
    function lstat(path: PathLike, options: StatOptions | undefined, callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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.
     */
    function lstatSync(path: PathLike, options?: StatOptions & { bigint?: false | undefined }): Stats;
    function lstatSync(path: PathLike, options: StatOptions & { bigint: true }): BigIntStats;
    function lstatSync(path: PathLike, options?: StatOptions): Stats | BigIntStats;

    /**
     * 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 link(existingPath: PathLike, newPath: PathLike, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous 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 linkSync(existingPath: PathLike, newPath: PathLike): 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.
     * @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 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.
     */
    function symlink(target: PathLike, path: PathLike, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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";
    }

    /**
     * Synchronous 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 symlinkSync(target: PathLike, path: PathLike, type?: symlink.Type | null): 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.
     */
    function readlink(
        path: PathLike,
        options: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | undefined | null,
        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.
     */
    function readlink(path: PathLike, options: { encoding: "buffer" } | "buffer", 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.
     */
    function readlink(
        path: PathLike,
        options: { encoding?: string | null | undefined } | string | undefined | null,
        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.
     */
    function readlink(path: PathLike, callback: (err: NodeJS.ErrnoException | null, linkString: string) => void): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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?: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | null): 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: { encoding: "buffer" } | "buffer"): 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?: { encoding?: string | null | undefined } | string | null): Promise<string | 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.
     */
    function readlinkSync(path: PathLike, options?: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | null): 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.
     */
    function readlinkSync(path: PathLike, options: { encoding: "buffer" } | "buffer"): 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.
     */
    function readlinkSync(path: PathLike, options?: { encoding?: string | null | undefined } | string | null): string | 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 realpath(
        path: PathLike,
        options: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | undefined | null,
        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.
     */
    function realpath(path: PathLike, options: { encoding: "buffer" } | "buffer", 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.
     */
    function realpath(
        path: PathLike,
        options: { encoding?: string | null | undefined } | string | undefined | null,
        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.
     */
    function realpath(path: PathLike, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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?: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | null): 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: { encoding: "buffer" } | "buffer"): 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?: { encoding?: string | null | undefined } | string | null): Promise<string | Buffer>;

        function native(
            path: PathLike,
            options: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | undefined | null,
            callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void
        ): void;
        function native(path: PathLike, options: { encoding: "buffer" } | "buffer", callback: (err: NodeJS.ErrnoException | null, resolvedPath: Buffer) => void): void;
        function native(
            path: PathLike,
            options: { encoding?: string | null | undefined } | string | undefined | null,
            callback: (err: NodeJS.ErrnoException | null, resolvedPath: string | Buffer) => void
        ): void;
        function native(path: PathLike, callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void): void;
    }

    /**
     * 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.
     */
    function realpathSync(path: PathLike, options?: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | null): 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.
     */
    function realpathSync(path: PathLike, options: { encoding: "buffer" } | "buffer"): 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.
     */
    function realpathSync(path: PathLike, options?: { encoding?: string | null | undefined } | string | null): string | Buffer;

    namespace realpathSync {
        function native(path: PathLike, options?: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | null): string;
        function native(path: PathLike, options: { encoding: "buffer" } | "buffer"): Buffer;
        function native(path: PathLike, options?: { encoding?: string | null | undefined } | string | null): string | Buffer;
    }

    /**
     * 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 unlink(path: PathLike, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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) - 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 unlinkSync(path: PathLike): void;

    interface RmDirOptions {
        /**
         * If an `EBUSY`, `ENOTEMPTY`, or `EPERM` error is
         * encountered, Node.js will retry the operation with a linear backoff wait of
         * 100ms longer on each try. This option represents the number of retries. This
         * option is ignored if the `recursive` option is not `true`.
         * @default 3
         */
        maxRetries?: number | undefined;
        /**
         * If `true`, perform a recursive directory removal. In
         * recursive mode, errors are not reported if `path` does not exist, and
         * operations are retried on failure.
         * @experimental
         * @default false
         */
        recursive?: boolean | undefined;
        /**
         * If an `EMFILE` error is encountered, Node.js will
         * retry the operation with a linear backoff of 1ms longer on each try until the
         * timeout duration passes this limit. This option is ignored if the `recursive`
         * option is not `true`.
         * @default 1000
         */
        emfileWait?: number | undefined;
    }

    /**
     * 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 rmdir(path: PathLike, callback: NoParamCallback): void;
    function rmdir(path: PathLike, options: RmDirOptions, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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) - delete a directory.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     */
    function rmdirSync(path: PathLike, options?: RmDirOptions): void;

    interface MakeDirectoryOptions {
        /**
         * Indicates whether parent folders should be created.
         * @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?: number | 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 mkdir(path: PathLike, options: number | string | MakeDirectoryOptions | undefined | null, callback: NoParamCallback): 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.
     */
    function mkdir(path: PathLike, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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?: number | string | MakeDirectoryOptions | null): Promise<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`.
     */
    function mkdirSync(path: PathLike, options?: number | string | MakeDirectoryOptions | null): 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.
     */
    function mkdtemp(
        prefix: string,
        options: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | undefined | null,
        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.
     */
    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.
     */
    function mkdtemp(
        prefix: string,
        options: { encoding?: string | null | undefined } | string | undefined | null,
        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.
     */
    function mkdtemp(prefix: string, callback: (err: NodeJS.ErrnoException | null, folder: string) => void): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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?: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | null): 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: { encoding: "buffer" } | "buffer"): 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?: { encoding?: string | null | undefined } | string | null): Promise<string | 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.
     */
    function mkdtempSync(prefix: string, options?: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | null): 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.
     */
    function mkdtempSync(prefix: string, options: { encoding: "buffer" } | "buffer"): 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.
     */
    function mkdtempSync(prefix: string, options?: { encoding?: string | null | undefined } | string | null): 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 The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
     */
    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.
     */
    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.
     */
    function readdir(
        path: PathLike,
        options: { encoding?: string | null | undefined; withFileTypes?: false | undefined } | string | 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.
     */
    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.
     */
    function readdir(path: PathLike, options: { encoding?: string | null | undefined; withFileTypes: true }, callback: (err: NodeJS.ErrnoException | null, files: Dirent[]) => void): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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?: { encoding?: string | null | undefined; withFileTypes?: false | undefined } | string | 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: { encoding?: string | null | undefined; withFileTypes: true }): Promise<Dirent[]>;
    }

    /**
     * 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.
     */
    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.
     */
    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.
     */
    function readdirSync(path: PathLike, options?: { encoding?: string | null | undefined; withFileTypes?: false | undefined } | string | 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.
     */
    function readdirSync(path: PathLike, options: { encoding?: string | null | undefined; withFileTypes: true }): Dirent[];

    /**
     * Asynchronous close(2) - close a file descriptor.
     * @param fd A file descriptor.
     */
    function close(fd: number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    namespace close {
        /**
         * Asynchronous close(2) - close a file descriptor.
         * @param fd A file descriptor.
         */
        function __promisify__(fd: number): Promise<void>;
    }

    /**
     * Synchronous close(2) - close a file descriptor.
     * @param fd A file descriptor.
     */
    function closeSync(fd: number): void;

    /**
     * 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 open(path: PathLike, flags: string | number, mode: string | number | 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.
     */
    function open(path: PathLike, flags: string | number, callback: (err: NodeJS.ErrnoException | null, fd: number) => void): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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: string | number, mode?: string | number | null): Promise<number>;
    }

    /**
     * Synchronous open(2) - open and possibly create a file, returning a file descriptor..
     * @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 openSync(path: PathLike, flags: string | number, mode?: string | number | null): number;

    /**
     * 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 utimes(path: PathLike, atime: string | number | Date, mtime: string | number | Date, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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: string | number | Date, mtime: string | number | Date): Promise<void>;
    }

    /**
     * Synchronously 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 utimesSync(path: PathLike, atime: string | number | Date, mtime: string | number | Date): void;

    /**
     * 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 futimes(fd: number, atime: string | number | Date, mtime: string | number | Date, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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: string | number | Date, mtime: string | number | Date): Promise<void>;
    }

    /**
     * Synchronously 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 futimesSync(fd: number, atime: string | number | Date, mtime: string | number | Date): void;

    /**
     * Asynchronous fsync(2) - synchronize a file's in-core state with the underlying storage device.
     * @param fd A file descriptor.
     */
    function fsync(fd: number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous fsync(2) - synchronize a file's in-core state with the underlying storage device.
     * @param fd A file descriptor.
     */
    function fsyncSync(fd: number): 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`.
     * @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 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`.
     */
    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`.
     */
    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.
     */
    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. If something other than a string is supplied it will be coerced to a string.
     * @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 write(
        fd: number,
        string: any,
        position: number | undefined | null,
        encoding: string | 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. If something other than a string is supplied it will be coerced to a string.
     * @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 write(fd: number, string: any, 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. If something other than a string is supplied it will be coerced to a string.
     */
    function write(fd: number, string: any, callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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. If something other than a string is supplied it will be coerced to a string.
         * @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: any, position?: number | null, encoding?: string | null): Promise<{ bytesWritten: number, buffer: string }>;
    }

    /**
     * Synchronously writes `buffer` to the file referenced by the supplied file descriptor, returning the number of bytes written.
     * @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 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. If something other than a string is supplied it will be coerced to a string.
     * @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 writeSync(fd: number, string: any, position?: number | null, encoding?: string | null): number;

    /**
     * Asynchronously reads data from the file referenced by the supplied file descriptor.
     * @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 read<TBuffer extends NodeJS.ArrayBufferView>(
        fd: number,
        buffer: TBuffer,
        offset: number,
        length: number,
        position: number | null,
        callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void,
    ): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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 }>;
    }

    /**
     * Synchronously reads data from the file referenced by the supplied file descriptor, returning the number of bytes 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 readSync(fd: number, buffer: NodeJS.ArrayBufferView, offset: number, length: number, position: number | null): number;

    /**
     * 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 readFile(
        path: PathLike | number,
        options: { encoding?: null | undefined; flag?: string | undefined; } | 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.
     * 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 readFile(path: PathLike | number, options: { encoding: string; flag?: string | undefined; } | string, 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.
     * 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 readFile(
        path: PathLike | number,
        options: { encoding?: string | null | undefined; flag?: string | undefined; } | string | 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.
     */
    function readFile(path: PathLike | number, callback: (err: NodeJS.ErrnoException | null, data: Buffer) => void): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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: PathLike | number, 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: PathLike | number, options: { encoding: string; flag?: string | undefined; } | string): 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: PathLike | number, options?: { encoding?: string | null | undefined; flag?: string | undefined; } | string | null): Promise<string | 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.
     * URL support is _experimental_.
     * 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 readFileSync(path: PathLike | number, 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.
     * 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 readFileSync(path: PathLike | number, options: { encoding: string; flag?: string | undefined; } | string): 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.
     * 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 readFileSync(path: PathLike | number, options?: { encoding?: string | null | undefined; flag?: string | undefined; } | string | null): string | Buffer;

    type WriteFileOptions = { encoding?: string | null | undefined; mode?: number | string | undefined; flag?: string | undefined; } | string | null;

    /**
     * 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 writeFile(path: PathLike | number, data: any, 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.
     * 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.
     */
    function writeFile(path: PathLike | number, data: any, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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: PathLike | number, data: any, options?: WriteFileOptions): Promise<void>;
    }

    /**
     * Synchronously 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 writeFileSync(path: PathLike | number, data: any, options?: WriteFileOptions): 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.
     * 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 appendFile(file: PathLike | number, data: any, 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.
     * 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.
     */
    function appendFile(file: PathLike | number, data: any, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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: PathLike | number, data: any, options?: WriteFileOptions): Promise<void>;
    }

    /**
     * Synchronously 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 appendFileSync(file: PathLike | number, data: any, options?: WriteFileOptions): void;

    /**
     * Watch for changes on `filename`. The callback `listener` will be called each time the file is accessed.
     */
    function watchFile(filename: PathLike, options: { persistent?: boolean | undefined; interval?: number | undefined; } | undefined, listener: (curr: Stats, prev: Stats) => void): void;

    /**
     * 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.
     * URL support is _experimental_.
     */
    function watchFile(filename: PathLike, listener: (curr: Stats, prev: Stats) => void): void;

    /**
     * Stop watching for changes on `filename`.
     * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
     * URL support is _experimental_.
     */
    function unwatchFile(filename: PathLike, listener?: (curr: Stats, prev: Stats) => void): void;

    /**
     * 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.
     * URL support is _experimental_.
     * @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.
     */
    function watch(
        filename: PathLike,
        options: { encoding?: BufferEncoding | null | undefined, persistent?: boolean | undefined, recursive?: boolean | undefined } | BufferEncoding | undefined | null,
        listener?: (event: string, filename: string) => void,
    ): 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.
     * URL support is _experimental_.
     * @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.
     */
    function watch(
        filename: PathLike,
        options: { encoding: "buffer", persistent?: boolean | undefined, recursive?: boolean | undefined } | "buffer",
        listener?: (event: string, filename: Buffer) => void
    ): 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.
     * URL support is _experimental_.
     * @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.
     */
    function watch(
        filename: PathLike,
        options: { encoding?: string | null | undefined, persistent?: boolean | undefined, recursive?: boolean | undefined } | string | null,
        listener?: (event: string, filename: string | Buffer) => void,
    ): 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.
     * URL support is _experimental_.
     */
    function watch(filename: PathLike, listener?: (event: string, filename: string) => any): FSWatcher;

    /**
     * Asynchronously tests whether or not the given path exists by checking with the file system.
     * @deprecated
     * @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 exists(path: PathLike, callback: (exists: boolean) => void): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronously tests whether or not the given path exists by checking with the file system.
     * @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 existsSync(path: PathLike): boolean;

    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;
    }

    /**
     * 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 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.
     * URL support is _experimental_.
     */
    function access(path: PathLike, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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 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 accessSync(path: PathLike, mode?: number): void;

    /**
     * Returns a new `ReadStream` object.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * URL support is _experimental_.
     */
    function createReadStream(path: PathLike, options?: string | {
        flags?: string | undefined;
        encoding?: string | undefined;
        fd?: number | undefined;
        mode?: number | undefined;
        autoClose?: boolean | undefined;
        /**
         * @default false
         */
        emitClose?: boolean | undefined;
        start?: number | undefined;
        end?: number | undefined;
        highWaterMark?: number | undefined;
    }): ReadStream;

    /**
     * Returns a new `WriteStream` object.
     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
     * URL support is _experimental_.
     */
    function createWriteStream(path: PathLike, options?: string | {
        flags?: string | undefined;
        encoding?: string | undefined;
        fd?: number | undefined;
        mode?: number | undefined;
        autoClose?: boolean | undefined;
        emitClose?: boolean | undefined;
        start?: number | undefined;
        highWaterMark?: number | undefined;
    }): WriteStream;

    /**
     * Asynchronous fdatasync(2) - synchronize a file's in-core state with storage device.
     * @param fd A file descriptor.
     */
    function fdatasync(fd: number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    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>;
    }

    /**
     * Synchronous fdatasync(2) - synchronize a file's in-core state with storage device.
     * @param fd A file descriptor.
     */
    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.
     * @param src A path to the source file.
     * @param dest A path to the destination file.
     */
    function copyFile(src: PathLike, dest: PathLike, callback: NoParamCallback): 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.
     * @param src A path to the source file.
     * @param dest A path to the destination file.
     * @param flags An integer that specifies the behavior of the copy operation. The only supported flag is fs.constants.COPYFILE_EXCL, which causes the copy operation to fail if dest already exists.
     */
    function copyFile(src: PathLike, dest: PathLike, flags: number, callback: NoParamCallback): void;

    // NOTE: This namespace provides design-time support for util.promisify. Exported members do not exist at runtime.
    namespace copyFile {
        /**
         * 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.
         * @param src A path to the source file.
         * @param dest A path to the destination file.
         * @param flags An optional integer that specifies the behavior of the copy operation.
         * The only supported flag is fs.constants.COPYFILE_EXCL,
         * which causes the copy operation to fail if dest already exists.
         */
        function __promisify__(src: PathLike, dst: PathLike, flags?: number): Promise<void>;
    }

    /**
     * Synchronously copies src to dest. By default, dest is overwritten if it already exists.
     * 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.
     * @param src A path to the source file.
     * @param dest A path to the destination file.
     * @param flags An optional integer that specifies the behavior of the copy operation.
     * The only supported flag is fs.constants.COPYFILE_EXCL, which causes the copy operation to fail if dest already exists.
     */
    function copyFileSync(src: PathLike, dest: PathLike, flags?: number): void;

    /**
     * Write an array of ArrayBufferViews to the file specified by fd using writev().
     * position is the offset from the beginning of the file where this data should be written.
     * It is unsafe to use fs.writev() multiple times on the same file without waiting for the callback. For this scenario, use fs.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.
     */
    function writev(
        fd: number,
        buffers: ReadonlyArray<NodeJS.ArrayBufferView>,
        cb: (err: NodeJS.ErrnoException | null, bytesWritten: number, buffers: NodeJS.ArrayBufferView[]) => void
    ): void;
    function writev(
        fd: number,
        buffers: ReadonlyArray<NodeJS.ArrayBufferView>,
        position: number,
        cb: (err: NodeJS.ErrnoException | null, bytesWritten: number, buffers: NodeJS.ArrayBufferView[]) => void
    ): void;

    interface WriteVResult {
        bytesWritten: number;
        buffers: NodeJS.ArrayBufferView[];
    }

    namespace writev {
        function __promisify__(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): Promise<WriteVResult>;
    }

    /**
     * See `writev`.
     */
    function writevSync(fd: number, buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): number;

    interface OpenDirOptions {
        encoding?: BufferEncoding | undefined;
    }

    function opendirSync(path: PathLike, options?: OpenDirOptions): Dir;

    function opendir(path: PathLike, cb: (err: NodeJS.ErrnoException | null, dir: Dir) => void): void;
    function opendir(path: PathLike, options: OpenDirOptions, cb: (err: NodeJS.ErrnoException | null, dir: Dir) => void): void;

    namespace opendir {
        function __promisify__(path: PathLike, options?: OpenDirOptions): Promise<Dir>;
    }

    namespace promises {
        interface FileHandle {
            /**
             * Gets the file descriptor for this file handle.
             */
            readonly fd: number;

            /**
             * Asynchronously append data to a file, creating the file if it does not exist. The underlying file will _not_ be closed automatically.
             * The `FileHandle` must have been opened for appending.
             * @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.
             */
            appendFile(data: any, options?: { encoding?: string | null | undefined, mode?: string | number | undefined, flag?: string | number | undefined } | string | null): Promise<void>;

            /**
             * Asynchronous fchown(2) - Change ownership of a file.
             */
            chown(uid: number, gid: number): Promise<void>;

            /**
             * Asynchronous fchmod(2) - Change permissions of a file.
             * @param mode A file mode. If a string is passed, it is parsed as an octal integer.
             */
            chmod(mode: string | number): Promise<void>;

            /**
             * Asynchronous fdatasync(2) - synchronize a file's in-core state with storage device.
             */
            datasync(): Promise<void>;

            /**
             * Asynchronous fsync(2) - synchronize a file's in-core state with the underlying storage device.
             */
            sync(): Promise<void>;

            /**
             * Asynchronously reads data from the file.
             * The `FileHandle` must have been opened for reading.
             * @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.
             */
            read<TBuffer extends Uint8Array>(buffer: TBuffer, offset?: number | null, length?: number | null, position?: number | null): Promise<{ bytesRead: number, buffer: TBuffer }>;

            /**
             * Asynchronously reads the entire contents of a file. The underlying file will _not_ be closed automatically.
             * The `FileHandle` must have been opened for reading.
             * @param options An object that may contain an optional flag.
             * If a flag is not provided, it defaults to `'r'`.
             */
            readFile(options?: { encoding?: null | undefined, flag?: string | number | undefined } | null): Promise<Buffer>;

            /**
             * Asynchronously reads the entire contents of a file. The underlying file will _not_ be closed automatically.
             * The `FileHandle` must have been opened for reading.
             * @param options An object that may contain an optional flag.
             * If a flag is not provided, it defaults to `'r'`.
             */
            readFile(options: { encoding: BufferEncoding, flag?: string | number | undefined } | BufferEncoding): Promise<string>;

            /**
             * Asynchronously reads the entire contents of a file. The underlying file will _not_ be closed automatically.
             * The `FileHandle` must have been opened for reading.
             * @param options An object that may contain an optional flag.
             * If a flag is not provided, it defaults to `'r'`.
             */
            readFile(options?: { encoding?: string | null | undefined, flag?: string | number | undefined } | string | null): Promise<string | Buffer>;

            /**
             * Asynchronous fstat(2) - Get file status.
             */
            stat(opts?: StatOptions & { bigint?: false | undefined }): Promise<Stats>;
            stat(opts: StatOptions & { bigint: true }): Promise<BigIntStats>;
            stat(opts: StatOptions): Promise<Stats | BigIntStats>;

            /**
             * Asynchronous ftruncate(2) - Truncate a file to a specified length.
             * @param len If not specified, defaults to `0`.
             */
            truncate(len?: number): Promise<void>;

            /**
             * Asynchronously change file timestamps of the file.
             * @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.
             */
            utimes(atime: string | number | Date, mtime: string | number | Date): Promise<void>;

            /**
             * Asynchronously writes `buffer` to the file.
             * The `FileHandle` must have been opened for writing.
             * @param buffer The buffer that the data will be written to.
             * @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.
             */
            write<TBuffer extends Uint8Array>(buffer: TBuffer, offset?: number | null, length?: number | null, position?: number | null): Promise<{ bytesWritten: number, buffer: TBuffer }>;

            /**
             * Asynchronously writes `string` to the file.
             * The `FileHandle` must have been opened for writing.
             * It is unsafe to call `write()` multiple times on the same file without waiting for the `Promise`
             * to be resolved (or rejected). For this scenario, `fs.createWriteStream` is strongly recommended.
             * @param string A string to write. If something other than a string is supplied it will be coerced to a string.
             * @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.
             */
            write(data: any, position?: number | null, encoding?: string | null): Promise<{ bytesWritten: number, buffer: string }>;

            /**
             * Asynchronously writes data to a file, replacing the file if it already exists. The underlying file will _not_ be closed automatically.
             * The `FileHandle` must have been opened for writing.
             * It is unsafe to call `writeFile()` multiple times on the same file without waiting for the `Promise` to be resolved (or rejected).
             * @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.
             */
            writeFile(data: any, options?: { encoding?: string | null | undefined, mode?: string | number | undefined, flag?: string | number | undefined } | string | null): Promise<void>;

            /**
             * See `fs.writev` promisified version.
             */
            writev(buffers: ReadonlyArray<NodeJS.ArrayBufferView>, position?: number): Promise<WriteVResult>;

            /**
             * Asynchronous close(2) - close a `FileHandle`.
             */
            close(): Promise<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.
         * URL support is _experimental_.
         */
        function access(path: PathLike, mode?: number): Promise<void>;

        /**
         * Asynchronously copies `src` to `dest`. By default, `dest` is overwritten if it already exists.
         * 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.
         * @param src A path to the source file.
         * @param dest A path to the destination file.
         * @param flags An optional integer that specifies the behavior of the copy operation. The only
         * supported flag is `fs.constants.COPYFILE_EXCL`, which causes the copy operation to fail if
         * `dest` already exists.
         */
        function copyFile(src: PathLike, dest: PathLike, flags?: number): Promise<void>;

        /**
         * 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 open(path: PathLike, flags: string | number, mode?: string | number): Promise<FileHandle>;

        /**
         * Asynchronously reads data from the file referenced by the supplied `FileHandle`.
         * @param handle A `FileHandle`.
         * @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 read<TBuffer extends Uint8Array>(
            handle: FileHandle,
            buffer: TBuffer,
            offset?: number | null,
            length?: number | null,
            position?: number | null,
        ): Promise<{ bytesRead: number, buffer: TBuffer }>;

        /**
         * Asynchronously writes `buffer` to the file referenced by the supplied `FileHandle`.
         * It is unsafe to call `fsPromises.write()` multiple times on the same file without waiting for the `Promise`
         * to be resolved (or rejected). For this scenario, `fs.createWriteStream` is strongly recommended.
         * @param handle A `FileHandle`.
         * @param buffer The buffer that the data will be written to.
         * @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 write<TBuffer extends Uint8Array>(
            handle: FileHandle,
            buffer: TBuffer,
            offset?: number | null,
            length?: number | null, position?: number | null): Promise<{ bytesWritten: number, buffer: TBuffer }>;

        /**
         * Asynchronously writes `string` to the file referenced by the supplied `FileHandle`.
         * It is unsafe to call `fsPromises.write()` multiple times on the same file without waiting for the `Promise`
         * to be resolved (or rejected). For this scenario, `fs.createWriteStream` is strongly recommended.
         * @param handle A `FileHandle`.
         * @param string A string to write. If something other than a string is supplied it will be coerced to a string.
         * @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 write(handle: FileHandle, string: any, position?: number | null, encoding?: string | null): Promise<{ bytesWritten: number, buffer: string }>;

        /**
         * 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 rename(oldPath: PathLike, newPath: PathLike): Promise<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.
         * @param len If not specified, defaults to `0`.
         */
        function truncate(path: PathLike, len?: number): Promise<void>;

        /**
         * Asynchronous ftruncate(2) - Truncate a file to a specified length.
         * @param handle A `FileHandle`.
         * @param len If not specified, defaults to `0`.
         */
        function ftruncate(handle: FileHandle, len?: number): Promise<void>;

        /**
         * 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 rmdir(path: PathLike, options?: RmDirOptions): Promise<void>;

        /**
         * Asynchronous fdatasync(2) - synchronize a file's in-core state with storage device.
         * @param handle A `FileHandle`.
         */
        function fdatasync(handle: FileHandle): Promise<void>;

        /**
         * Asynchronous fsync(2) - synchronize a file's in-core state with the underlying storage device.
         * @param handle A `FileHandle`.
         */
        function fsync(handle: FileHandle): 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 mkdir(path: PathLike, options?: number | string | MakeDirectoryOptions | null): Promise<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.
         */
        function readdir(path: PathLike, options?: { encoding?: BufferEncoding | null | undefined; 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 readdir(path: PathLike, options: { encoding: "buffer"; withFileTypes?: false | undefined } | "buffer"): 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 readdir(path: PathLike, options?: { encoding?: string | null | undefined; withFileTypes?: false | undefined } | string | 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 readdir(path: PathLike, options: { encoding?: string | null | undefined; withFileTypes: true }): Promise<Dirent[]>;

        /**
         * 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 readlink(path: PathLike, options?: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | null): 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 readlink(path: PathLike, options: { encoding: "buffer" } | "buffer"): 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 readlink(path: PathLike, options?: { encoding?: string | null | undefined } | string | null): Promise<string | Buffer>;

        /**
         * 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 symlink(target: PathLike, path: PathLike, type?: string | null): Promise<void>;

        /**
         * 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 lstat(path: PathLike, opts?: StatOptions & { bigint?: false | undefined }): Promise<Stats>;
        function lstat(path: PathLike, opts: StatOptions & { bigint: true }): Promise<BigIntStats>;
        function lstat(path: PathLike, opts?: StatOptions): Promise<Stats | BigIntStats>;

        /**
         * 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 stat(path: PathLike, opts?: StatOptions & { bigint?: false | undefined }): Promise<Stats>;
        function stat(path: PathLike, opts: StatOptions & { bigint: true }): Promise<BigIntStats>;
        function stat(path: PathLike, opts?: StatOptions): Promise<Stats | BigIntStats>;

        /**
         * 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 link(existingPath: PathLike, newPath: PathLike): Promise<void>;

        /**
         * 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 unlink(path: PathLike): Promise<void>;

        /**
         * Asynchronous fchmod(2) - Change permissions of a file.
         * @param handle A `FileHandle`.
         * @param mode A file mode. If a string is passed, it is parsed as an octal integer.
         */
        function fchmod(handle: FileHandle, mode: string | number): Promise<void>;

        /**
         * 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 chmod(path: PathLike, mode: string | number): Promise<void>;

        /**
         * 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 lchmod(path: PathLike, mode: string | number): Promise<void>;

        /**
         * 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 lchown(path: PathLike, uid: number, gid: number): Promise<void>;

        /**
         * 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 lutimes(path: PathLike, atime: string | number | Date, mtime: string | number | Date): Promise<void>;

        /**
         * Asynchronous fchown(2) - Change ownership of a file.
         * @param handle A `FileHandle`.
         */
        function fchown(handle: FileHandle, uid: number, gid: number): Promise<void>;

        /**
         * 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 chown(path: PathLike, uid: number, gid: number): Promise<void>;

        /**
         * 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 utimes(path: PathLike, atime: string | number | Date, mtime: string | number | Date): Promise<void>;

        /**
         * Asynchronously change file timestamps of the file referenced by the supplied `FileHandle`.
         * @param handle A `FileHandle`.
         * @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 futimes(handle: FileHandle, atime: string | number | Date, mtime: string | number | Date): Promise<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.
         */
        function realpath(path: PathLike, options?: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | null): 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 realpath(path: PathLike, options: { encoding: "buffer" } | "buffer"): 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 realpath(path: PathLike, options?: { encoding?: string | null | undefined } | string | null): Promise<string | 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 mkdtemp(prefix: string, options?: { encoding?: BufferEncoding | null | undefined } | BufferEncoding | null): 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 mkdtemp(prefix: string, options: { encoding: "buffer" } | "buffer"): 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 mkdtemp(prefix: string, options?: { encoding?: string | null | undefined } | string | null): Promise<string | Buffer>;

        /**
         * Asynchronously writes data to a file, replacing the file if it already exists.
         * It is unsafe to call `fsPromises.writeFile()` multiple times on the same file without waiting for the `Promise` to be resolved (or rejected).
         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
         * URL support is _experimental_.
         * If a `FileHandle` 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 writeFile(
            path: PathLike | FileHandle,
            data: any,
            options?: { encoding?: string | null | undefined, mode?: string | number | undefined, flag?: string | number | undefined } | string | null
        ): Promise<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.
         * URL support is _experimental_.
         * If a `FileHandle` 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 appendFile(
            path: PathLike | FileHandle,
            data: any,
            options?: { encoding?: string | null | undefined, mode?: string | number | undefined, flag?: string | number | undefined } | string | null
        ): Promise<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 `FileHandle` 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 readFile(path: PathLike | FileHandle, options?: { encoding?: null | undefined, flag?: string | number | 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.
         * If a `FileHandle` 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 readFile(path: PathLike | FileHandle, options: { encoding: BufferEncoding, flag?: string | number | 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.
         * If a `FileHandle` 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 readFile(path: PathLike | FileHandle, options?: { encoding?: string | null | undefined, flag?: string | number | undefined } | string | null): Promise<string | Buffer>;

        function opendir(path: PathLike, options?: OpenDirOptions): Promise<Dir>;
    }

    interface BigIntStats extends StatsBase<bigint> {
    }

    class BigIntStats {
        atimeNs: bigint;
        mtimeNs: bigint;
        ctimeNs: bigint;
        birthtimeNs: bigint;
    }

    interface BigIntOptions {
        bigint: true;
    }

    interface StatOptions {
        bigint: boolean;
    }
}
Name	Size	Permission
LICENSE	1141 bytes	0755
README.md	2291 bytes	0755
assert.d.ts	5088 bytes	0755
async_hooks.d.ts	10831 bytes	0755
buffer.d.ts	706 bytes	0755
child_process.d.ts	25573 bytes	0755
cluster.d.ts	16162 bytes	0755
console.d.ts	51 bytes	0755
constants.d.ts	22966 bytes	0755
crypto.d.ts	45767 bytes	0755
dgram.d.ts	5959 bytes	0755
dns.d.ts	16239 bytes	0755
domain.d.ts	547 bytes	0755
events.d.ts	1869 bytes	0755
fs.d.ts	139247 bytes	0755
globals.d.ts	50333 bytes	0755
globals.global.d.ts	55 bytes	0755
http.d.ts	24133 bytes	0755
http2.d.ts	57095 bytes	0755
https.d.ts	12427 bytes	0755
index.d.ts	4396 bytes	0755
inspector.d.ts	123550 bytes	0755
module.d.ts	56 bytes	0755
net.d.ts	13531 bytes	0755
os.d.ts	7965 bytes	0755
package.json	5881 bytes	0755
path.d.ts	5992 bytes	0755
perf_hooks.d.ts	9939 bytes	0755
process.d.ts	517 bytes	0755
punycode.d.ts	3470 bytes	0755
querystring.d.ts	1096 bytes	0755
readline.d.ts	7144 bytes	0755
repl.d.ts	18094 bytes	0755
stream.d.ts	18310 bytes	0755
string_decoder.d.ts	185 bytes	0755
timers.d.ts	826 bytes	0755
tls.d.ts	35150 bytes	0755
trace_events.d.ts	2113 bytes	0755
tty.d.ts	2442 bytes	0755
url.d.ts	4449 bytes	0755
util.d.ts	12352 bytes	0755
v8.d.ts	6927 bytes	0755
vm.d.ts	4900 bytes	0755
wasi.d.ts	2257 bytes	0755
worker_threads.d.ts	9718 bytes	0755
zlib.d.ts	14258 bytes	0755
File Content: fs.d.ts

File Content: `fs.d.ts`
