Node.js process.setegid()方法
原文:https://www . geesforgeks . org/node-js-process-setegid-method/
process.setegid()方法是流程模块的内置应用编程接口，用于设置 Node.js 流程的数字有效组标识。
语法:
process.setegid(id)
参数:该方法接受如上所述的单个参数，描述如下:
- ID: is required. It is a string or integer that represents the group name or ID. If the group name is passed, it will block when resolving the associated digital ID.
返回:不返回任何东西。
注意:此功能仅在 POSIX 平台上有效。在 windows 或 android 平台上不可用，因此会导致错误，即 TypeError，setegid 不是一个函数。
下面的例子说明了 process.setegid()方法在 Node.js 中的使用:
例 1:
// Node.js program to demonstrate the
// process.setegid() Method
// Include process module
const process = require('process');
// Printing the numerical effective group
// identity of the Node.js process checking
// whether the methods exists or not
if (process.getegid && process.setegid ) {
// Setting gid
process.setegid(400);
// Printing getegid() value
console.log("The numerical effective group"
+ " identity of the Node.js process:"
+ process.getegid());
}
输出:
The numerical effective group identity of the Node.js process: 400
例 2:
// Node.js program to demonstrate the
// process.setegid() Method
// Include process module
const process = require('process');
// Checking whether the method
// exists or not
if (process.setegid) {
try {
process.setegid(696);
console.log("gid has successfully been set");
} catch (err) {
console.log("Failed to set gid:", err);
}
}
// Checking whether the method exists or not
if (process.getegid) {
// Printing getegid() value
console.log("The numerical effective group identity"
+ " of the Node.js process:"
+ process.getegid());
}
输出:
gid has successfully been set
The numerical effective group identity of the Node.js process: 696
注意:以上程序使用node filename.js命令编译运行。
参考:T2】https://nodejs.org/api/process.html#process_process_setegid
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