diff --git a/api/@ohos.fileio.d.ts b/api/@ohos.fileio.d.ts
index b0b6c666197ed74d2d7d59762721f5efdc990f23..d6b847336665ffc8d331e85b5c8ce17ab600a27e 100644
--- a/api/@ohos.fileio.d.ts
+++ b/api/@ohos.fileio.d.ts
@@ -12,888 +12,237 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import { AsyncCallback } from './basic'
 
 export default fileIO;
+
 /**
- * This callback is fileIO error callback
- */
-export type fileErrCallBack = (err: Error) => any;
-/**
- * This callback is fileIO error callback
- */
-export type fileStringCallBack = (err: Error, value: string) => any;
-/**
- * This callback is fileIO stat callback
- */
-export type fileStatCallBack = (err: Error, stat: Stat) => any;
-/**
- * This callback is fileIO dtemp callback
- */
-export type fileDtempCallBack = (err: Error, directory: string) => any;
-/**
- * This callback is fileIO open callback
- */
-export type fileOpenCallBack = (err: Error, fd: number) => any;
-/**
- * This callback is fileIO read callback
- */
-export type fileReadCallBack = (err: Error, bytesRead: number, buffer: ArrayBuffer) => any;
-/**
- * This callback is fileIO write callback
- */
-export type fileWriteCallBack = (err: Error, bytesWritten: number) => any;
-/**
- * This callback is fileIO Dir callback
- */
-export type fileDirCallBack = (err: Error, dir: Dir) => any;
-/**
- * This callback is fileIO Dir callback
- */
-export type fileDirentCallBack = (err: Error, dirent: Dirent) => any;
-/**
- * This callback is fileIO Stream callback
- */
-export type fileStreamCallBack = (err: Error, stream: Stream) => any;
-/**
- * This callback is fileIO watch listener
+ * fileio
+ * @sysCap N/A
+ * @since 6
+ * @devices phone, tablet, tv, wearable, car
+ * @import import fileio from '@ohos.fileio';
+ * @permission N/A
  */
-export type fileWatchFunc = (events: number) => any;
-export type ReadOut = {
-    bytesRead: number;
-    offset: number;
-    buffer: ArrayBuffer;
-};
 declare namespace fileIO {
-    export { stat };
-    export { statSync };
-    export { opendir };
-    export { opendirSync };
-    export { createStream };
-    export { createStreamSync };
-    export { fdopenStream };
-    export { fdopenStreamSync };
-    export { access };
     export { accessSync };
-    export { chown };
-    export { chownSync };
-    export { chmod };
     export { chmodSync };
-    export { close };
+    export { chownSync };
     export { closeSync };
-    export { copyFile };
     export { copyFileSync };
-    export { fchown };
-    export { fchownSync };
-    export { fchmod };
+    export { createStreamSync };
     export { fchmodSync };
-    export { fdatasync };
-    export { fdatasyncSync };
-    export { fstat };
+    export { fchownSync };
+    export { fdopenStreamSync };
     export { fstatSync };
-    export { fsync };
     export { fsyncSync };
-    export { ftruncate };
     export { ftruncateSync };
-    export { lchown };
-    export { lchownSync };
-    export { link };
-    export { linkSync };
-    export { lstat };
-    export { lstatSync };
-    export { mkdir };
     export { mkdirSync };
-    export { mkdtemp };
-    export { mkdtempSync };
-    export { open };
     export { openSync };
-    export { readText };
-    export { readTextSync };
-    export { read };
+    export { opendirSync };
     export { readSync };
-    export { rename };
     export { renameSync };
-    export { rmdir };
     export { rmdirSync };
-    export { symlink };
-    export { symlinkSync };
-    export { truncate };
+    export { statSync };
     export { truncateSync };
-    export { unlink };
     export { unlinkSync };
-    export { write };
     export { writeSync };
     export { Dir };
     export { Dirent };
     export { Stat };
     export { Stream };
-    export { createWatcher };
-    export { Watcher };
-}
-declare interface Stat {
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly dev: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly ino: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly mode: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly nlink: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly uid: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly gid: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly rdev: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly size: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly blocks: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly atime: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly mtime: number;
-    /**
-     * @type {number}
-     * @readonly
-     */
-    readonly ctime: number;
-    /**
-     * isBlockDevice.
-     * @returns {boolean} is or not
-     */
-    isBlockDevice(): boolean;
-    /**
-     * isCharacterDevice.
-     * @returns {boolean} is or not
-     */
-    isCharacterDevice(): boolean;
-    /**
-     * isDirectory.
-     * @returns {boolean} is or not
-     */
-    isDirectory(): boolean;
-    /**
-     * isFIFO.
-     * @returns {boolean} is or not
-     */
-    isFIFO(): boolean;
-    /**
-     * isFile.
-     * @returns {boolean} is or not
-     */
-    isFile(): boolean;
-    /**
-     * isSocket.
-     * @returns {boolean} is or not
-     */
-    isSocket(): boolean;
-    /**
-     * isSymbolicLink.
-     * @returns {boolean} is or not
-     */
-    isSymbolicLink(): boolean;
-}
-declare interface Dir {
-    /**
-     * read.
-     *
-     * @param {fileDirCallBack} [callback] - callback.
-     * @returns {undefined | Promise<Dirent>} no callback return Promise otherwise return undefined
-     * @throws {TypedError} Parameter check failed if read to end, Error.msg = "NoMore"
-     */
-    read(): Promise<Dirent>;
-    read(callback: fileDirentCallBack): undefined;
-    /**
-     * readSync.
-     *
-     * @returns {Dirent} Dirent Object
-     * @throws {TypedError | Error} read fail if read to end, Error.msg = "NoMore"
-     */
-    readSync(): Dirent;
-    /**
-     * closeSync.
-     *
-     * @param {fileErrCallBack} [callback] - callback.
-     * @returns {undefined | Promise<undefined>} close success
-     * @throws {TypedError | Error} close fail
-     */
-    close(): Promise<undefined>;
-    close(callback: fileErrCallBack): undefined;
-    /**
-     * closeSync.
-     *
-     * @returns {undefined} close success
-     * @throws {TypedError | Error} close fail
-     */
-    closeSync(): undefined;
-}
-declare interface Stream {
-    /**
-     * write.
-     *
-     * @param {ArrayBuffer | string} buffer - file description.
-     * @param {Object} [options] - options.
-     * @param {number} [options.offset = 0] - offset(bytes) ignored when buffer is string.
-     * @param {number} [options.length = -1] - length(bytes) ignored when buffer is string.
-     * @param {number} [options.position = -1] - position(bytes) where start to write < 0 use read, else use pread.
-     * @param {string} [options.encoding = 'utf-8'] -  encoding.
-     * @param {fileWriteCallBack} [callback] - callback.
-     * @returns {undefined | Promise<number>} no callback return Promise otherwise return undefined
-     * @throws {TypedError} Parameter check failed
-     */
-    write(buffer: ArrayBuffer | string, options?: {
-        offset?: number;
-        length?: number;
-        position?: number;
-        encoding?: string;
-    }): Promise<number>;
-    write(buffer: ArrayBuffer | string, callback: fileWriteCallBack): undefined;
-    write(buffer: ArrayBuffer | string, options: {
-        offset?: number;
-        length?: number;
-        position?: number;
-        encoding?: string;
-    }, callback: fileWriteCallBack): undefined;
-    /**
-     * writeSync.
-     *
-     * @param {ArrayBuffer | string} buffer - file description.
-     * @param {Object} [options] - options.
-     * @param {number} [options.offset = 0] - offset(bytes) ignored when buffer is string.
-     * @param {number} [options.length = -1] - length(bytes) ignored when buffer is string.
-     * @param {number} [options.position = -1] - position(bytes) where start to write < 0 use read, else use pread.
-     * @param {string} [options.encoding = 'utf-8'] -  encoding.
-     * @returns {number} on success number of bytes written
-     * @throws {TypedError | Error} write fail
-     */
-    writeSync(buffer: ArrayBuffer | string, options?: {
-        offset?: number;
-        length?: number;
-        position?: number;
-        encoding?: string;
-    }): number;
-    /**
-     * flush.
-     *
-     * @param {fileErrCallBack} [callback] - callback.
-     * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
-     * @throws {TypedError} Parameter check failed
-     */
-    flush(): Promise<undefined>;
-    flush(callback: fileErrCallBack): undefined;
-    /**
-     * flushSync.
-     *
-     * @returns {undefined} flush success
-     * @throws {Error} flush fail
-     */
-    flushSync(): undefined;
-    /**
-     * read.
-     *
-     * @param {ArrayBuffer} buffer - file description.
-     * @param {Object} [options] - options.
-     * @param {number} [options.offset = 0] - offset.
-     * @param {number} [options.length = -1] - length.
-     * @param {fileReadCallBack} [callback] - callback.
-     * @returns {undefined | Promise<ReadOut>} no callback return Promise otherwise return undefined
-     * @throws {TypedError} Parameter check failed
-     */
-    read(buffer: ArrayBuffer, options?: {
-        offset?: number;
-        length?: number;
-    }): Promise<ReadOut>;
-    read(buffer: ArrayBuffer, callback: fileReadCallBack): undefined;
-    read(buffer: ArrayBuffer, options: {
-        offset?: number;
-        length?: number;
-    }, callback: fileReadCallBack): undefined;
-    /**
-     * readSync.
-     *
-     * @param {ArrayBuffer} buffer - file description.
-     * @param {Object} [options] - options.
-     * @param {number} [options.offset = 0] - offset.
-     * @param {number} [options.length = -1] - length.
-     * @returns {number} number of bytesRead
-     * @throws {TypedError | Error} read fail
-     */
-    readSync(buffer: ArrayBuffer, options?: {
-        offset?: number;
-        length?: number;
-    }): number;
-    /**
-     * closeSync.
-     *
-     * @param {fileErrCallBack} [callback] - callback.
-     * @returns {undefined | Promise<undefined>} close success
-     * @throws {TypedError | Error} close fail
-     */
-    close(): Promise<undefined>;
-    close(callback: fileErrCallBack): undefined;
-    /**
-     * closeSync.
-     *
-     * @returns {undefined} close success
-     * @throws {TypedError | Error} close fail
-     */
-    closeSync(): undefined;
 }
 
-/**
- * This callback is fileIO error callback
- * @callback fileErrCallBack
- * @param {Error} err
- */
-/**
- * This callback is fileIO stat callback
- * @callback fileStatCallBack
- * @param {Error} err
- * @param {Stat} stat
- */
-/**
- * This callback is fileIO dtemp callback
- * @callback fileDtempCallBack
- * @param {Error} err
- * @param {string} directory
- */
-/**
- * This callback is fileIO open callback
- * @callback fileOpenCallBack
- * @param {Error} err
- * @param {number} fd
- */
-/**
- * This callback is fileIO read callback
- * @callback fileReadCallBack
- * @param {Error} err
- * @param {number} bytesRead
- * @param {ArrayBuffer} buffer
- */
-/**
- * This callback is fileIO write callback
- * @callback fileWriteCallBack
- * @param {Error} err
- * @param {bytesWritten} bytesWritten
- */
-/**
- * This callback is fileIO Dir callback
- * @callback fileDirCallBack
- * @param {Error} err
- * @param {Dir} Dir Object
- */
-/**
- * This callback is fileIO Stream callback
- * @callback fileStreamCallBack
- * @param {Error} err
- * @param {Stream} Dir Object
- */
-/**
- * This callback is fileIO watch listener
- * @callback fileWatchFunc
- * @param {number} events
- * @returns {Any} if return false, watch stopped
- */
-/**
- * @typedef ReadOut
- * @type {object}
- * @property {number} bytesRead
- * @property {number} offset
- * @property {ArrayBuffer} buffer
- */
 
 /**
- * stat.
- * @static
- * @param {string} path - path.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<Stat>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function stat(path: string): Promise<Stat>;
-declare function stat(path: string, callback: fileErrCallBack): undefined;
-
-/**
- * hash.
- * @static
- * @param {string} path - path.
- * @param {string} algorithm - algorithm md5 sha1 sha2-256.
- * @param {fileStringCallBack} [callback] - callback.
- * @returns {undefined | Promise<string>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function hash(path: string, algorithm: string): Promise<string>;
-declare function hash(path: string, callback: fileStringCallBack): undefined;
-
-/**
- * statSync.
- * @static
- * @param {string} path - path.
- * @returns {Stat} stat success
- * @throws {TypedError | Error} stat fail
- */
-declare function statSync(path: string): Stat;
-/**
- * opendir.
- *
- * @param {string} path - directory name.
- * @param {fileDirCallBack} [callback] - callback.
- * @returns {undefined | Promise<Dir>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function opendir(path: string): Promise<Dir>;
-declare function opendir(path: string, callback: fileDirCallBack): undefined;
-/**
- * opendirSync.
- *
- * @param {string} path - directory name.
- * @returns {Dir} opendir Dir Object
- * @throws {TypedError | Error} opendir fail
- */
-declare function opendirSync(path: string): Dir;
-/**
- * createStream.
- *
- * @param {string} path - path.
- * @param {string} mode - mode.
- * @param {fileStreamCallBack} [callback] - callback.
- * @returns {undefined | Promise<Stream>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function createStream(path: string, mode: string): Promise<Stream>;
-declare function createStream(path: string, mode: string, callback: fileStreamCallBack): undefined;
-/**
- * createStreamSync.
+ * accessSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
+ * @function accessSync
  * @param {string} path - path.
- * @param {string} mode - mode.
- * @returns {Stream} open stream from path
- * @throws {TypedError | Error} open fail
- */
-declare function createStreamSync(path: string, mode: string): Stream;
-/**
- * fdopenStream.
- *
- * @param {number} fd - fd.
- * @param {string} mode - mode.
- * @param {fileStreamCallBack} [callback] - callback.
- * @returns {undefined | Promise<Stream>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
+ * @param {number} [mode = 0] - mode.
+ * @returns {void} access success
+ * @throws {TypedError | Error} access fail
  */
-declare function fdopenStream(fd: number, mode: string): Promise<Stream>;
-declare function fdopenStream(fd: number, mode: string, callback: fileStreamCallBack): undefined;
+declare function accessSync(path: string, mode?: number): void;
 /**
- * fdopenStreamSync.
+ * closeSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
+ * @function closeSync
  * @param {number} fd - fd.
- * @param {string} mode - mode.
- * @returns {Stream} open stream from fd
- * @throws {TypedError | Error} open fail
- */
-declare function fdopenStreamSync(fd: number, mode: string): Stream;
-/**
- * access.
- *
- * @function appendFile
- * @param {string} path - path.
- * @param {number} [mode = 0] - mode.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
+ * @returns {void} close success
+ * @throws {TypedError | Error} close fail
  */
-declare function access(path: string, mode?: number): Promise<undefined>;
-declare function access(path: string, callback: fileErrCallBack): undefined;
-declare function access(path: string, mode: number, callback: fileErrCallBack): undefined;
+declare function closeSync(fd: number): void;
 /**
- * accessSync.
+ * copyFileSync.
  *
- * @function appendFile
- * @param {string} path - path.
+ * @note N/A
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
+ * @function copyFileSync
+ * @param {string} src - src.
+ * @param {string} dest - dest.
  * @param {number} [mode = 0] - mode.
- * @returns {undefined} access success
- * @throws {TypedError | Error} access fail
+ * @returns {void} copyFile success
+ * @throws {TypedError | Error} copyFile fail
  */
-declare function accessSync(path: string, mode?: number): undefined;
+declare function copyFileSync(src: string, dest: string, mode?: number): void;
 /**
- * chown.
+ * createStreamSync.
  *
- * @function appendFile
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
+ * @function createStreamSync
  * @param {string} path - path.
- * @param {number} uid - mode.
- * @param {number} gid - mode.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
+ * @param {string} mode - mode.
+ * @returns {Stream} createStream
  * @throws {TypedError} Parameter check failed
  */
-declare function chown(path: string, uid: number, gid: number): Promise<undefined>;
-declare function chown(path: string, uid: number, gid: number, callback: fileErrCallBack): undefined;
+declare function createStreamSync(path: string, mode: string): Stream;
 /**
  * chownSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
  * @function appendFile
  * @param {string} path - path.
  * @param {number} uid - mode.
  * @param {number} gid - mode.
- * @returns {undefined} chown success
+ * @returns {void} chown success
  * @throws {TypedError | Error} chown fail
  */
-declare function chownSync(path: string, uid: number, gid: number): undefined;
-/**
- * chmod.
- *
- * @function chmod
- * @param {string} path - path.
- * @param {number} mode - mode.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function chmod(path: string, mode: number): Promise<undefined>;
-declare function chmod(path: string, mode: number, callback: fileErrCallBack): undefined;
+declare function chownSync(path: string, uid: number, gid: number): void;
 /**
  * chmodSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
  * @function chmodSync
  * @param {string} path - path.
  * @param {number} mode - mode.
- * @returns {undefined} chmod success
+ * @returns {void} chmod success
  * @throws {TypedError | Error} chmod fail
  */
-declare function chmodSync(path: string, mode: number): undefined;
+declare function chmodSync(path: string, mode: number): void;
 /**
- * close.
+ * ftruncateSync.
  *
- * @function close
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
+ * @function ftruncateSync
  * @param {number} fd - fd.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
+ * @param {number} [len = 0] - len.
+ * @returns {void} ftruncate success
+ * @throws {TypedError | Error} ftruncate fail
  */
-declare function close(fd: number): Promise<undefined>;
-declare function close(fd: number, callback: fileErrCallBack): undefined;
+declare function ftruncateSync(fd: number, len?: number): void;
 /**
- * closeSync.
+ * fsyncSync.
  *
- * @function closeSync
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
+ * @function fsyncSync
  * @param {number} fd - fd.
- * @returns {undefined} close success
- * @throws {TypedError | Error} close fail
- */
-declare function closeSync(fd: number): undefined;
-/**
- * copyFile.
- *
- * @function copyFile
- * @param {string | number} src - src.
- * @param {string | number} dest - dest.
- * @param {number} [mode = 0] - mode.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function copyFile(src: string | number, dest: string | number, mode?: number): Promise<undefined>;
-declare function copyFile(src: string | number, dest: string | number, callback: fileErrCallBack): undefined;
-declare function copyFile(src: string | number, dest: string | number, mode: number, callback: fileErrCallBack): undefined;
-/**
- * copyFileSync.
- *
- * @function copyFileSync
- * @param {string | number} src - src.
- * @param {string | number} dest - dest.
- * @param {number} [mode = 0] - mode.
- * @returns {undefined} copyFile success
- * @throws {TypedError | Error} copyFile fail
+ * @returns {void} fsync success
+ * @throws {TypedError | Error} fsync fail
  */
-declare function copyFileSync(src: string | number, dest: string | number, mode?: number): undefined;
+declare function fsyncSync(fd: number): void;
 /**
- * fchown.
+ * fstatSync.
  *
- * @function fchown
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
+ * @function fstatSync
  * @param {number} fd - fd.
- * @param {number} uid - uid.
- * @param {number} gid - gid.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
+ * @returns {Stat}
+ * @throws {TypedError | Error} fstat fail
  */
-declare function fchown(fd: number, uid: number, gid: number): Promise<undefined>;
-declare function fchown(fd: number, uid: number, gid: number, callback: fileErrCallBack): undefined;
+declare function fstatSync(fd: number): Stat;
 /**
  * fchownSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
  * @function fchownSync
  * @param {number} fd - fd.
  * @param {number} uid - uid.
  * @param {number} gid - gid.
- * @returns {undefined} fchown success
+ * @returns {void} fchown success
  * @throws {TypedError | Error} fchown fail
  */
-declare function fchownSync(fd: number, uid: number, gid: number): undefined;
-/**
- * fchmod.
- *
- * @function fchmod
- * @param {number} fd - fd.
- * @param {number} mode - mode.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function fchmod(fd: number, mode: number): Promise<undefined>;
-declare function fchmod(fd: number, mode: number, callback: fileErrCallBack): undefined;
+declare function fchownSync(fd: number, uid: number, gid: number): void;
 /**
  * fchmodSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
  * @function fchmodSync
  * @param {number} fd - fd.
  * @param {number} mode - mode.
- * @returns {undefined} fchmod success
+ * @returns {void} fchmod success
  * @throws {TypedError | Error} fchmod fail
  */
-declare function fchmodSync(fd: number, mode: number): undefined;
-/**
- * fdatasync.
- *
- * @function fdatasync
- * @param {number} fd - fd.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function fdatasync(fd: number): Promise<undefined>;
-declare function fdatasync(fd: number, callback: fileErrCallBack): undefined;
-/**
- * fdatasyncSync.
- *
- * @function fdatasyncSync
- * @param {number} fd - fd.
- * @returns {undefined} fdatasync success
- * @throws {TypedError | Error} fdatasync fail
- */
-declare function fdatasyncSync(fd: number): undefined;
-/**
- * fstat.
- *
- * @function fstat
- * @param {number} fd - fd.
- * @param {fileStatCallBack} [callback] - callback.
- * @returns {undefined | Promise<Stat>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function fstat(fd: number): Promise<Stat>;
-declare function fstat(fd: number, callback: fileStatCallBack): undefined;
-/**
- * fstatSync.
- *
- * @function fstatSync
- * @param {number} fd - fd.
- * @returns {Stat}
- * @throws {TypedError | Error} fstat fail
- */
-declare function fstatSync(fd: number): Stat;
-/**
- * fsync.
- *
- * @function fsync
- * @param {number} fd - fd.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function fsync(fd: number): Promise<undefined>;
-declare function fsync(fd: number, callback: fileErrCallBack): undefined;
-/**
- * fsyncSync.
- *
- * @function fsyncSync
- * @param {number} fd - fd.
- * @returns {undefined} fsync success
- * @throws {TypedError | Error} fsync fail
- */
-declare function fsyncSync(fd: number): undefined;
-/**
- * ftruncate.
- *
- * @function ftruncate
- * @param {number} fd - fd.
- * @param {number} [len = 0] - len.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function ftruncate(fd: number, len?: number): Promise<undefined>;
-declare function ftruncate(fd: number, callback: fileErrCallBack): undefined;
-declare function ftruncate(fd: number, len: number, callback: fileErrCallBack): undefined;
-/**
- * ftruncateSync.
- *
- * @function ftruncateSync
- * @param {number} fd - fd.
- * @param {number} [len = 0] - len.
- * @returns {undefined} ftruncate success
- * @throws {TypedError | Error} ftruncate fail
- */
-declare function ftruncateSync(fd: number, len?: number): undefined;
-/**
- * lchown.
- *
- * @function lchown
- * @param {string} path - path.
- * @param {number} uid - uid.
- * @param {number} gid - gid.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function lchown(path: string, uid: number, gid: number): Promise<undefined>;
-declare function lchown(path: string, uid: number, gid: number, callback: fileErrCallBack): undefined;
-/**
- * lchownSync.
- *
- * @function lchownSync
- * @param {string} path - path.
- * @param {number} uid - uid.
- * @param {number} gid - gid.
- * @returns {undefined} lchown success
- * @throws {TypedError | Error} lchown fail
- */
-declare function lchownSync(path: string, uid: number, gid: number): undefined;
+declare function fchmodSync(fd: number, mode: number): void;
 /**
- * link.
- *
- * @function link
- * @param {string} existingPath - existingPath.
- * @param {string} newPath - newPath.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function link(existingPath: string, newPath: string): Promise<undefined>;
-declare function link(existingPath: string, newPath: string, callback: fileErrCallBack): undefined;
-/**
- * linkSync.
- *
- * @function linkSync
- * @param {string} existingPath - existingPath.
- * @param {string} newPath - newPath.
- * @returns {undefined} link success
- * @throws {TypedError | Error} link fail
- */
-declare function linkSync(existingPath: string, newPath: string): undefined;
-/**
- * lstat.
- *
- * @function lstat
- * @param {string} path - path.
- * @param {fileStatCallBack} [callback] - callback.
- * @returns {undefined | Promise<Stat>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function lstat(path: string): Promise<Stat>;
-declare function lstat(path: string, callback: fileStatCallBack): undefined;
-/**
- * lstatSync.
- *
- * @function lstatSync
- * @param {string} path - path.
- * @returns {Stat} lstat success
- * @throws {TypedError | Error} lstat fail
- */
-declare function lstatSync(path: string): Stat;
-/**
- * mkdir.
- *
- * @function mkdir
- * @param {string} path - path.
- * @param {string} [mode = 0o775] - path.
- * @param {fileStatCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function mkdir(path: string, mode?: string): Promise<undefined>;
-declare function mkdir(path: string, callback: fileStatCallBack): undefined;
-declare function mkdir(path: string, mode: string, callback: fileStatCallBack): undefined;
-/**
- * mkdirSync.
- *
- * @function mkdirSync
- * @param {string} path - path.
- * @param {string} [mode = 0o775] - path.
- * @returns {undefined} mkdir success
- * @throws {TypedError | Error} mkdir fail
- */
-declare function mkdirSync(path: string, mode?: string): undefined;
-/**
- * mkdtemp.
- *
- * @function mkdtemp
- * @param {string} prefix - dir prefix.
- * @param {fileDtempCallBack} [callback] - callback.
- * @returns {undefined | Promise<string>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function mkdtemp(prefix: string): Promise<string>;
-declare function mkdtemp(prefix: string, callback: fileDtempCallBack): undefined;
-/**
- * mkdtempSync.
- *
- * @function mkdtempSync
- * @param {string} prefix - dir prefix.
- * @returns {string} directory name
- * @throws {TypedError | Error} mkdtemp fail
+ * fdopenStreamSync.
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
+ * @function fdopenStreamSync
+ * @param {number} fd - fd.
+ * @param {string} mode - mode.
+ * @returns {Stream} open stream from fd
+ * @throws {TypedError | Error} open fail
  */
-declare function mkdtempSync(prefix: string): string;
+declare function fdopenStreamSync(fd: number, mode: string): Stream;
 /**
- * open.
+ * mkdirSync.
  *
- * @function open
+ * @note N/A
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
+ * @function mkdirSync
  * @param {string} path - path.
- * @param {number} [flags = 0] - flags.
- * @param {number} [mode = 0o666] - mode.
- * @param {fileOpenCallBack} [callback] - callback.
- * @returns {undefined | Promise<number>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
+ * @param {number} [mode = 0o775] - path.
+ * @returns {void} mkdir success
+ * @throws {TypedError | Error} mkdir fail
  */
-declare function open(path: string, flags?: number, mode?: number): Promise<number>;
-declare function open(path: string, callback: fileOpenCallBack): undefined;
-declare function open(path: string, flags: number, callback: fileOpenCallBack): undefined;
-declare function open(path: string, flags: number, mode: number, callback: fileOpenCallBack): undefined;
+declare function mkdirSync(path: string, mode?: number): void;
+
 /**
  * openSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
  * @function openSync
  * @param {string} path - path.
  * @param {number} [flags = 0] - flags.
@@ -904,76 +253,23 @@ declare function open(path: string, flags: number, mode: number, callback: fileO
 declare function openSync(path: string, flags?: number, mode?: number): number;
 
 /**
- * readText.
- *
- * @function readText
- * @param {string} filePath - file path.
- * @param {Object} [options] - options.
- * @param {number} [options.offset = 0] - offset in bytes.
- * @param {number} [options.length = -1] - length in bytes.
- * @param {number} [options.encoding = 'utf-8'] - encoding.
- * @param {fileStringCallBack} [callback] - callback.
- * @returns {undefined | Promise<string>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function readText(filePath: string, options?: {
-    offset?: number;
-    length?: number;
-    encoding?: string;
-}): Promise<string>;
-declare function readText(filePath: string, options?: {
-    offset?: number;
-    length?: number;
-    encoding?: string;
-}, callback: fileStringCallBack): undefined;
-
-/**
- * readTextSync.
- *
- * @function readTextSync
- * @param {string} filePath - file path.
- * @param {Object} [options] - options.
- * @param {number} [options.offset = 0] - offset in bytes.
- * @param {number} [options.length = -1] - length in bytes.
- * @param {number} [options.encoding = 'utf-8'] - encoding.
- * @returns {string} readout result
- * @throws {TypedError} Parameter check failed
- */
-declare function readTextSync(filePath: string, options?: {
-    offset?: number;
-    length?: number;
-    encoding?: string;
-}): string;
-
-/**
- * read.
+ * opendirSync.
  *
- * @function read
- * @param {number} fd - file description.
- * @param {ArrayBuffer} buffer - file description.
- * @param {Object} [options] - options.
- * @param {number} [options.offset = 0] - offset.
- * @param {number} [options.length = -1] - length.
- * @param {number} [options.position = -1] - position.
- * @param {fileReadCallBack} [callback] - callback.
- * @returns {undefined | Promise<ReadOut>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
+ * @param {string} path - directory name.
+ * @returns {Dir} opendir Dir Object
+ * @throws {TypedError | Error} opendir fail
  */
-declare function read(fd: number, buffer: ArrayBuffer, options?: {
-    offset?: number;
-    length?: number;
-}): Promise<ReadOut>;
-declare function read(fd: number, buffer: ArrayBuffer, callback: fileReadCallBack): undefined;
-declare function read(fd: number, buffer: ArrayBuffer, options: {
-    offset?: number;
-    length?: number;
-}, callback: fileReadCallBack): undefined;
+declare function opendirSync(path: string): Dir;
 /**
  * readSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
  * @function readSync
- * @param {number} fd - file description.
- * @param {ArrayBuffer} buffer - file description.
+ * @param {number} fd - file descriptor.
+ * @param {ArrayBuffer} buffer - file descriptor.
  * @param {Object} [options] - options.
  * @param {number} [options.offset = 0] - offset.
  * @param {number} [options.length = -1] - length.
@@ -984,148 +280,85 @@ declare function read(fd: number, buffer: ArrayBuffer, options: {
 declare function readSync(fd: number, buffer: ArrayBuffer, options?: {
     offset?: number;
     length?: number;
+    position?: number;
 }): number;
-/**
- * rename.
- *
- * @function rename
- * @param {string} oldPath - oldPath.
- * @param {string} newPath - newPath.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function rename(oldPath: string, newPath: string): Promise<undefined>;
-declare function rename(oldPath: string, newPath: string, callback: fileErrCallBack): undefined;
 /**
  * renameSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
  * @function renameSync
  * @param {string} oldPath - oldPath.
  * @param {string} newPath - newPath.
- * @returns {undefined} rename success
+ * @returns {void} rename success
  * @throws {TypedError | Error} rename fail
  */
-declare function renameSync(oldPath: string, newPath: string): undefined;
-/**
- * rmdir.
- *
- * @function rmdir
- * @param {string} path - path.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function rmdir(path: string): Promise<undefined>;
-declare function rmdir(path: string, callback: fileErrCallBack): undefined;
+declare function renameSync(oldPath: string, newPath: string): void;
+
 /**
  * rmdirSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
  * @function rmdirSync
  * @param {string} path - path.
- * @returns {undefined} rmdir success
+ * @returns {void} rmdir success
  * @throws {TypedError | Error} rmdir fail
  */
-declare function rmdirSync(path: string): undefined;
-/**
- * symlink.
- *
- * @function symlink
- * @param {string} target - target.
- * @param {string} srcPath - srcPath.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function symlink(target: string, srcPath: string): Promise<undefined>;
-declare function symlink(target: string, srcPath: string, callback: fileErrCallBack): undefined;
+declare function rmdirSync(path: string): void;
 /**
- * symlinkSync.
- *
- * @function symlinkSync
- * @param {string} target - target.
- * @param {string} srcPath - srcPath.
- * @returns {undefined} symlink success
- * @throws {TypedError | Error} symlink fail
- */
-declare function symlinkSync(target: string, srcPath: string): undefined;
-/**
- * truncate.
- *
- * @function truncate
+ * statSync.
+ * @static
+ * @note N/A
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
  * @param {string} path - path.
- * @param {number} [len = 0] - len.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
+ * @returns {Stat} stat success
+ * @throws {TypedError | Error} stat fail
  */
-declare function truncate(path: string, len?: number): Promise<undefined>;
-declare function truncate(path: string, callback: fileErrCallBack): undefined;
-declare function truncate(path: string, len: number, callback: fileErrCallBack): undefined;
+declare function statSync(path: string): Stat;
 /**
  * truncateSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 7
+ * @permission N/A
  * @function truncateSync
  * @param {string} path - path.
  * @param {number} [len = 0] - len.
- * @returns {undefined} truncate success
+ * @returns {void} truncate success
  * @throws {TypedError | Error} truncate fail
  */
-declare function truncateSync(path: string, len?: number): undefined;
-/**
- * unlink.
- *
- * @function unlink
- * @param {string} path - path.
- * @param {fileErrCallBack} [callback] - callback.
- * @returns {undefined | Promise<undefined>} no callback return Promise otherwise return undefined
- * @throws {TypedError} Parameter check failed
- */
-declare function unlink(path: string): Promise<undefined>;
-declare function unlink(path: string, callback: fileErrCallBack): undefined;
+declare function truncateSync(path: string, len?: number): void;
 /**
  * unlinkSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
  * @function unlinkSync
  * @param {string} path - path.
- * @returns {undefined} unlink success
+ * @returns {void} unlink success
  * @throws {TypedError | Error} unlink fail
  */
-declare function unlinkSync(path: string): undefined;
-/**
- * write.
- *
- * @function write
- * @param {number} fd - file description.
- * @param {ArrayBuffer | string} buffer - file description.
- * @param {Object} [options] - options.
- * @param {number} [options.offset = 0] - offset(bytes) ignored when buffer is string.
- * @param {number} [options.length = -1] - length(bytes) ignored when buffer is string.
- * @param {number} [options.position = -1] - position(bytes) where start to write < 0 use read, else use pread.
- * @param {string} [options.encoding = 'utf-8'] - encoding.
- * @param {fileWriteCallBack} [callback] - callback.
- * @returns {undefined | Promise<number>} no callback return Promise otherwise return undefined
- * @throws {TypedError | RangeError} Parameter check failed
- */
-declare function write(fd: number, buffer: ArrayBuffer | string, options?: {
-    offset?: number;
-    length?: number;
-    position?: number;
-    encoding?: string;
-}): Promise<number>;
-declare function write(fd: number, buffer: ArrayBuffer | string, callback: fileWriteCallBack): undefined;
-declare function write(fd: number, buffer: ArrayBuffer | string, options: {
-    offset?: number;
-    length?: number;
-    position?: number;
-    encoding?: string;
-}, callback: fileWriteCallBack): undefined;
+declare function unlinkSync(path: string): void;
 /**
  * writeSync.
  *
+ * @note N/A
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
  * @function writeSync
- * @param {number} fd - file description.
- * @param {ArrayBuffer | string} buffer - file description.
+ * @param {number} fd - file descriptor.
+ * @param {ArrayBuffer | string} buffer - file descriptor.
  * @param {Object} [options] - options.
  * @param {number} [options.offset = 0] - offset(bytes) ignored when buffer is string.
  * @param {number} [options.length = -1] - length(bytes) ignored when buffer is string.
@@ -1140,64 +373,371 @@ declare function writeSync(fd: number, buffer: ArrayBuffer | string, options?: {
     position?: number;
     encoding?: string;
 }): number;
+
 /**
- * watch.
- *
- * @param {string} filename - filename.
- * @param {number} events - events(depends on OS & filesystem).
- * @param {fileWatchFunc} listener - listener.
- * @returns {Watcher} watch success
- * @throws {TypedError | Error} watch fail
+ * Dir
+ * @devices phone, tablet, tv, wearable, car
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
  */
-declare function createWatcher(filename: string, events: number, listener: fileWatchFunc): Watcher;
+declare interface Dir {
+    /**
+     * readSync.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @function readSync
+     * @returns {Dirent} Dirent Object
+     * @throws {TypedError | Error} read fail if read to end, Error.msg = "NoMore"
+     */
+    readSync(): Dirent;
+    /**
+     * closeSync.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @function closeSync
+     * @returns {void} close success
+     * @throws {TypedError | Error} close fail
+     */
+    closeSync(): void;
+}
 
+/**
+ * Dirent
+ * @devices phone, tablet, tv, wearable, car
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
+ */
 declare interface Dirent {
     /**
      * @type {string}
      * @readonly
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
      */
     readonly name: string;
     /**
      * isBlockDevice.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
      * @returns {boolean} is or not
      */
     isBlockDevice(): boolean;
     /**
      * isCharacterDevice.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
      * @returns {boolean} is or not
      */
     isCharacterDevice(): boolean;
     /**
      * isDirectory.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
      * @returns {boolean} is or not
      */
     isDirectory(): boolean;
     /**
      * isFIFO.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
      * @returns {boolean} is or not
      */
     isFIFO(): boolean;
     /**
      * isFile.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
      * @returns {boolean} is or not
      */
     isFile(): boolean;
     /**
      * isSocket.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
      * @returns {boolean} is or not
      */
     isSocket(): boolean;
     /**
      * isSymbolicLink.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
      * @returns {boolean} is or not
      */
     isSymbolicLink(): boolean;
 }
-declare interface Watcher {
+
+/**
+ * Stat
+ * @devices phone, tablet, tv, wearable, car
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
+ */
+declare interface Stat {
     /**
-     * stop
-     *
-     * @returns {undefined}
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly dev: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly ino: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
      */
-    stop(): undefined;
+    readonly mode: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly nlink: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly uid: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly gid: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly rdev: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly size: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly blocks: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly atime: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly mtime: number;
+    /**
+     * @type {number}
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @readonly
+     */
+    readonly ctime: number;
+    /**
+     * isBlockDevice.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @returns {boolean} is or not
+     */
+    isBlockDevice(): boolean;
+    /**
+     * isCharacterDevice.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @returns {boolean} is or not
+     */
+    isCharacterDevice(): boolean;
+    /**
+     * isDirectory.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @returns {boolean} is or not
+     */
+    isDirectory(): boolean;
+    /**
+     * isFIFO.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @returns {boolean} is or not
+     */
+    isFIFO(): boolean;
+    /**
+     * isFile.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @returns {boolean} is or not
+     */
+    isFile(): boolean;
+    /**
+     * isSocket.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @returns {boolean} is or not
+     */
+    isSocket(): boolean;
+    /**
+     * isSymbolicLink.
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @returns {boolean} is or not
+     */
+    isSymbolicLink(): boolean;
 }
+
+/**
+ * Stream
+ * @devices phone, tablet, tv, wearable, car
+ * @sysCap N/A
+ * @since 6
+ * @permission N/A
+ */
+declare interface Stream {
+    /**
+     * closeSync.
+     *
+     * @note N/A
+     * @sysCap N/A
+     * @since 6
+     * @permission N/A
+     * @returns {void} close success
+     * @throws {TypedError | Error} close fail
+     */
+    closeSync(): void;
+    /**
+     * flushSync.
+     *
+     * @note N/A
+     * @sysCap N/A
+     * @since 7
+     * @permission N/A
+     * @returns {void} flush success
+     * @throws {Error} flush fail
+     */
+    flushSync(): void;
+    /**
+     * writeSync.
+     *
+     * @note N/A
+     * @sysCap N/A
+     * @since 7
+     * @permission N/A
+     * @param {ArrayBuffer | string} buffer - file description.
+     * @param {Object} [options] - options.
+     * @param {number} [options.offset = 0] - offset(bytes) ignored when buffer is string.
+     * @param {number} [options.length = -1] - length(bytes) ignored when buffer is string.
+     * @param {number} [options.position = -1] - position(bytes) where start to write < 0 use read, else use pread.
+     * @param {string} [options.encoding = 'utf-8'] -  encoding.
+     * @returns {number} on success number of bytes written
+     * @throws {TypedError | Error} write fail
+     */
+    writeSync(buffer: ArrayBuffer | string, options?: {
+        offset?: number;
+        length?: number;
+        position?: number;
+        encoding?: string;
+    }): number;
+    /**
+     * readSync.
+     *
+     * @note N/A
+     * @sysCap N/A
+     * @since 7
+     * @permission N/A
+     * @param {ArrayBuffer} buffer - file description.
+     * @param {Object} [options] - options.
+     * @param {number} [options.offset = 0] - offset.
+     * @param {number} [options.length = -1] - length.
+     * @returns {number} number of bytesRead
+     * @throws {TypedError | Error} read fail
+     */
+    readSync(buffer: ArrayBuffer, options?: {
+        position?: number;
+        offset?: number;
+        length?: number;
+    }): number;
+}
\ No newline at end of file