process.umask(mask)

• mask <string> | <integer>

process.umask(mask) 设置 Node.js 进程的文件模式创建掩码。 子进程从父进程继承掩码。 返回上一个掩码。

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

在 Worker 线程中，process.umask(mask) 会抛出异常。

• 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.

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

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