process.umask

History

process.umask(mask): void

Attributes

mask:string | integer

process.umask(mask) sets the Node.js process's file mode creation mask. Child processes inherit the mask from the parent process. Returns the previous mask.

import { umask } from 'node:process';

const newmask = 0o022;
const oldmask = umask(newmask);
console.log(
  `Changed umask from ${oldmask.toString(8)} to ${newmask.toString(8)}`,
);

JavaScript

const { umask } = require('node:process');

const newmask = 0o022;
const oldmask = umask(newmask);
console.log(
  `Changed umask from ${oldmask.toString(8)} to ${newmask.toString(8)}`,
);

JavaScript

In Worker threads, process.umask(mask) will throw an exception.