Node.js process.setuid() Method
The process.setuid() method is an inbuilt application programming interface of the process module which is used to set the user identity of the Node.js process.
Syntax:
process.setuid(id)
Parameters: This method accepts single parameter as mentioned above and described below:
- id: It is a required parameter that holds a String or an integer denotes either numeric ID or username string, if username is passed, it blocks while resolving the associated numeric ID.
Return: It does not return any value.
Note: This function will only work on POSIX platforms. Not available on windows or android platforms so will cause an error i.e. TypeError, setuid is not a function.
Below examples illustrate the use of process.setuid() method in Node.js:
Example 1:
Javascript
// Node.js program to demonstrate the // process.setuid() Method // Including process module const process = require( 'process' ); // Print the user identity of the Node.js // process and check whether the methods // exists or not if (process.getuid && process.setuid ) { // Setting user id process.setuid(400); // Printing getuid() value console.log( "The user identity of the Node.js" + " process:" , process.getuid()); } |
Output:
The user identity of the Node.js process: 400
Example 2:
Javascript
// Node.js program to demonstrate the // process.setuid() Method // Including process module const process = require( 'process' ); // Set user id and check whether // the method exists or not if (process.setuid) { // Within try catch try { process.setuid(696); console.log( "User id has successfully been set" ); } catch (err) { console.log( "Failed to set user id:" , err); } } // Check whether the method exists or not if (process.getuid) { // Printing getuid() value console.log( "The user identity of the Node.js" + " process:" , process.getuid()); } |
Output:
User id has successfully been set The user identity of the Node.js process: 696
Note: The above program will compile and run by using the node filename.js command.
Reference: https://nodejs.org/api/process.html#process_process_setuid_id
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