Node.js process.setgroups() Method
The process.setgroups() method is an inbuilt application programming interface of the process module which is used to set the supplementary group IDs.
Syntax:
process.setgroups( groups )
Parameters: This method accepts a single parameter as mentioned above and described below.
- groups: This is a required parameter, an array of strings or integers or both denotes group ID or group name or both.
Return: It doesn’t return anything. For setting group Ids the Node.js process needs root permission as it is a privileged operation.
Note: This function will only work on POSIX platforms. Not available on windows or android platform so will cause to an error i.e. TypeError, setgroups is not a function.
Below examples illustrate the use of process.setgroups() method in Node.js:
Example 1:
// Allocating process module const process = require( 'process' ); // Printing the supplementary group // IDs before setting. console.log(process.getgroups()); // Array of Group Ids var arr= new Array(300, 400, 2000); // Setting the supplementary group IDs. process.setgroups(arr); // Printing the supplementary group IDs. console.log(process.getgroups()); |
Output:
[ 0 ] [ 300, 400, 2000, 0 ]
Example 2:
// Allocating process module const process = require( 'process' ); if (process.setgroups) { var arr= new Array(300, 400, 2000); // Setting the supplementary group IDs. process.setgroups(arr); } // Checking whether the method exists or not if (process.getgroups) { // Printing getgroups() console.log( "The supplementary group IDs :" , process.getgroups()); } |
Output:
The supplementary group IDs : [ 300, 400, 2000, 0 ]
Note: The above program will compile and run by using the node filename.js command, only in POSIX platforms.
Reference: https://nodejs.org/api/process.html#process_process_setgroups_groups
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