Categories
28°C, New York
Home NodeJS execFile() method

execFile() method

exec() method:

The child_process.execFile() function is does not spawn a shell by default. It is slightly more efficient than child_process.exec() as the specified executable file is spawned directly as a new process.

 Syntax:

child_process.execFile(file[, args][, options][, callback])

Parameters:

  • file: Accepts a string that specifies the name or path of the file to run.
  • args: List of string arguments.
  • options: Some of the options available are cwd, env, encoding, shell, timeout etc
  • callback: The callback function is called when the process terminates. The arguments to this function are error, stdout, and stderr respectively.

Return Value: Returns an instance of ChildProcess. 

Example: In this example, we will see the use of the execFile() method.

javascript




const { execFile } = require('child_process');
 
// Executes the exec.js file
const child = execFile('node', ['exec.js'],
    (error, stdout, stderr) => {
        if (error) {
            throw error;
        }
        console.log(stdout);
    });
 






                        









													
													
												

												
												

													
													
Output:

													
													
												

												
												

													
													

													
													
												

												
												

													
													

													
													
												

												
												

													
													

													
													
												

												
												

													
													

													
													
												

												
											

											
											

												
Node Child Process

												
												

													
													
Node is a tool that uses JavaScript and has many useful parts to it. Normally, it does work with one thread at a time, which means it can handle tasks without waiting. However, when there’s a lot of work to be done, we use the child_process module to create additional threads. These extra threads can talk to each other using a built-in messaging system.

													
													
												

												
												

													
													
The following are the four different ways to create a child process in Nodejs:

													
													
												

												
												

													
													


Table of Content


    

  • spawn() method
    • 

  • fork() method
    • 

  • exec() method
    • 

  • execFile() method
    • 




													
													
												

												
												

													
													
Above mentioned ways are explained below: 

													
													
												

												
											

										


										
										

											
Similar Reads

											
											

												
													

														spawn() method:

													

														spawn() method is a new process using the given command and the command line arguments in args. The ChildProcess instance implements EventEmitterAPI which enables us to register handlers for events on child objects directly. Some events that can be registered for handling with the ChildProcess are exit, disconnect, error, close, and message....
													

												
											

											
											

												
													

														fork() method:

													

														...
													

												
											

											
											

												
													

														exec() method:

													

														child_process.fork() is a variant of child_process.spawn() allowing communication between parent and child via send(). It facilitates the isolation of compute-heavy tasks from the main event loop, but numerous child processes can impact performance due to each having its own memory....
													

												
											

											
											

												
													

														execFile() method:

													

														...
													

												
											

											
										


									

									

										
Tags:

										
										#Node.js-Basics
										
										#Node.js
										
										#Web Technologies
										

									

									

										

											
											
												
												exec() method: