process.initgroups(user, extraGroup)

• user <string> | <number> 用户名或数字标识符。
• extraGroup <string> | <number> 组名或数字标识符。

process.initgroups() 方法读取 /etc/group 文件并初始化组访问列表，使用用户所属的所有组。这是一个需要特权的操作，要求 Node.js 进程拥有 root 权限或 CAP_SETGID 能力。

【The process.initgroups() method reads the /etc/group file and initializes the group access list, using all groups of which the user is a member. This is a privileged operation that requires that the Node.js process either have root access or the CAP_SETGID capability.】

删除权限时要小心：

【Use care when dropping privileges:】

import { getgroups, initgroups, setgid } from 'node:process';

console.log(getgroups());         // [ 0 ]
initgroups('nodeuser', 1000);     // switch user
console.log(getgroups());         // [ 27, 30, 46, 1000, 0 ]
setgid(1000);                     // drop root gid
console.log(getgroups());         // [ 27, 30, 46, 1000 ]const { getgroups, initgroups, setgid } = require('node:process');

console.log(getgroups());         // [ 0 ]
initgroups('nodeuser', 1000);     // switch user
console.log(getgroups());         // [ 27, 30, 46, 1000, 0 ]
setgid(1000);                     // drop root gid
console.log(getgroups());         // [ 27, 30, 46, 1000 ]拷贝

此功能仅在 POSIX 平台上可用（即不支持 Windows 或 Android）。 此功能在 Worker 线程中不可用。

【This function is only available on POSIX platforms (i.e. not Windows or Android). This feature is not available in Worker threads.】