Asynchronously writes buffer to the file referenced by the supplied file descriptor.
Asynchronously writes buffer to the file referenced by the supplied file descriptor.
Asynchronously writes buffer to the file referenced by the supplied file descriptor.
A file descriptor.
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.Asynchronously writes string to the file referenced by the supplied file descriptor.
A file descriptor.
A string to write.
The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
The expected string encoding.
Asynchronously writes string to the file referenced by the supplied file descriptor.
A file descriptor.
A string to write.
The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
Asynchronously writes string to the file referenced by the supplied file descriptor.
A file descriptor.
A string to write.
Write
bufferto the file specified byfd.offsetdetermines the part of the buffer to be written, andlengthis an integer specifying the number of bytes to write.positionrefers to the offset from the beginning of the file where this data should be written. Iftypeof position !== 'number', the data will be written at the current position. Seepwrite(2).The callback will be given three arguments
(err, bytesWritten, buffer)wherebytesWrittenspecifies how many bytes were written frombuffer.If this method is invoked as its
util.promisify()ed version, it returns a promise for anObjectwithbytesWrittenandbufferproperties.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.