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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