namespace

fs.write

function write<TBuffer extends ArrayBufferView<ArrayBufferLike>>(

fd: number,

buffer: TBuffer,

offset?: null | number,

length?: null | number,

position?: null | number,

callback: (err: null | ErrnoException, written: number, buffer: TBuffer) => void

): void;

Write buffer to the file specified by fd.

offset determines the part of the buffer to be written, and length is an integer specifying the number of bytes to write.

position refers to the offset from the beginning of the file where this data should be written. If typeof position !== 'number', the data will be written at the current position. See pwrite(2).

The callback will be given three arguments (err, bytesWritten, buffer) where bytesWritten specifies how many bytes were written from buffer.

If this method is invoked as its util.promisify() ed version, it returns a promise for an Object with bytesWritten and buffer properties.

It is unsafe to use fs.write() multiple times on the same file without waiting for the callback. For this scenario, createWriteStream is recommended.

On Linux, positional writes don't work when the file is opened in append mode. The kernel ignores the position argument and always appends the data to the end of the file.

function write<TBuffer extends ArrayBufferView<ArrayBufferLike>>(

fd: number,

buffer: TBuffer,

offset: undefined | null | number,

length: undefined | null | number,

callback: (err: null | ErrnoException, 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 ArrayBufferView<ArrayBufferLike>>(

fd: number,

buffer: TBuffer,

offset: undefined | null | number,

callback: (err: null | ErrnoException, 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 ArrayBufferView<ArrayBufferLike>>(

fd: number,

buffer: TBuffer,

callback: (err: null | ErrnoException, 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 ArrayBufferView<ArrayBufferLike>>(

fd: number,

buffer: TBuffer,

options: WriteOptions,

callback: (err: null | ErrnoException, written: number, buffer: TBuffer) => void

): void;

Asynchronously writes buffer to the file referenced by the supplied file descriptor.

@param fd

A file descriptor.

@param options

An object with the following properties:

offset The part of the buffer to be written. If not supplied, defaults to 0.
length The number of bytes to write. If not supplied, defaults to buffer.length - offset.
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: string,

position: undefined | null | number,

encoding: undefined | null | BufferEncoding,

callback: (err: null | ErrnoException, written: number, str: string) => void

): void;

Asynchronously writes string to the file referenced by the supplied file descriptor.

@param fd

A file descriptor.

@param string

A string to write.

@param position

The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.

@param encoding

The expected string encoding.

function write(

fd: number,

string: string,

position: undefined | null | number,

callback: (err: null | ErrnoException, written: number, str: string) => void

): void;

Asynchronously writes string to the file referenced by the supplied file descriptor.

@param fd

A file descriptor.

@param string

A string to write.

@param position

The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.

function write(

fd: number,

string: string,

callback: (err: null | ErrnoException, 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.

fs.write

namespace write