Node.js process.seteuid() 方法
process.seteuid() 方法是 process 模块的内置应用程序编程接口,用于设置 Node.js 进程的有效用户身份。
句法:
process.seteuid( id )
参数:此方法接受上面提到的单个参数,如下所述:
- id:它是一个必需的参数,它包含一个字符串或一个整数,表示数字 ID 或用户名字符串。如果传递了用户名,它会在解析关联的数字 ID 时阻塞。
返回值:不返回任何值。
注意:此函数仅适用于 POSIX 平台。它在 windows 或 android 平台上不可用,因此会导致错误,即 TypeError, seteuid is not a 函数。
下面的例子说明了在 Node.js 中process.seteuid() 方法的使用:
示例 1:
Javascript
// Node.js program to demonstrate the
// process.seteuid() method
// Include process module
const process = require('process');
// Printing the effective user identity
// of the Node.js process and checking
// whether the method exists or not
if (process.geteuid && process.seteuid ) {
// Setting user id
process.seteuid(400);
// Printing geteuid()
console.log("The effective user identity "
+ "of the Node.js process:"
+ process.geteuid());
}
Javascript
// Node.js program to demonstrate the
// process.seteuid() method
// Include process module
const process = require('process');
// Set user id and checking whether
// the method exists or not
if (process.seteuid) {
// Within try catch
try {
process.seteuid(696);
console.log("User id has successfully been set");
} catch (err) {
console.log("Failed to set user id:", err);
}
}
// Checking whether the method exists or not
if (process.geteuid) {
// Printing geteuid() value
console.log("The numerical effective user "
+ "identity of the Node.js process:"
+ process.geteuid());
}
输出:
The effective user identity of the Node.js process: 400
示例 2:
Javascript
// Node.js program to demonstrate the
// process.seteuid() method
// Include process module
const process = require('process');
// Set user id and checking whether
// the method exists or not
if (process.seteuid) {
// Within try catch
try {
process.seteuid(696);
console.log("User id has successfully been set");
} catch (err) {
console.log("Failed to set user id:", err);
}
}
// Checking whether the method exists or not
if (process.geteuid) {
// Printing geteuid() value
console.log("The numerical effective user "
+ "identity of the Node.js process:"
+ process.geteuid());
}
输出:
User id has successfully been set
The numerical effective user identity of the Node.js process: 696
注意:上面的程序将使用 node filename.js 命令编译和运行。
参考: https://nodejs.org/api/process.html#process_process_seteuid_id