writeSync

Start from API_LEVEL 2.0 . Please refer to API_LEVEL.

Synchronously write ArrayBuffer to the file specified by fd.

Type

function writeSync(option: Option): Result

Parameters

Option

Property	Type	Required	DefaultValue	Description	API_LEVEL
fd	number	Y	-	File handle, returned by the openSync, openAssetsSync and other APIs	2.0
buffer	ArrayBuffer	Y	-	The buffer that the data will be written to	2.0
options	Options	N	-	Other Options	2.0

Options

Property	Type	Required	DefaultValue	Description	API_LEVEL
offset	number	N	0	Based on first address offset in ArrayBuffer to write the data	2.0
length	number	N	buffer.byteLength	The number of bytes to write, the default is the length of the incoming buffer	2.0
position	number|null	N	null	Position refers to the offset from the beginning of the file where this data should be written. If position is 'null', the data will be written at the and the file position will be updated	2.0

Result

Type	Description
number	The number of bytes written

Example

import { openSync, writeSync, O_RDWR, O_CREAT } from '@zos/fs'

const fd = openSync({
  path: 'test.txt',
  flag: O_RDWR | O_CREAT,
})

const buffer = new ArrayBuffer(4)
const result = writeSync({
  fd,
  buffer,
})

if (result === 0) {
  console.log('writeSync success')
}