process.seteuid()方法是流程模块的内置应用程序编程接口,用于设置Node.js流程的有效用户身份。
用法:
process.seteuid( id )
参数:此方法接受上述和以下描述的单个参数:
- id:它是一个必需参数,它包含一个String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,则在解析关联的数字ID时会阻塞。
返回值:它不返回任何值。
注意:此函数仅在POSIX平台上有效。它在Windows或Android平台上不可用,因此会导致错误,即TypeError,seteuid不是函数。
以下示例说明了Node.js中process.seteuid()方法的使用:
范例1:
// 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());
}
输出:
The effective user identity of the Node.js process:400
范例2:
// 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) {
// Withinn 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:上面的程序将通过使用node filename.js
命令。
参考: https://nodejs.org/api/process.html#process_process_seteuid_id
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