Nodejs child_process

[DrProfSagi]

Hey, i am building a site at work using node js, i need it to run a cmd commands (figured out how to do it with shell_process), but the thing is, that i need to run this as a function that parse the data and process it a bit, then retrun it to be compared, displayed and stroed in a db.

I also need to run it multiple times, so i figured that putting the function in an external js file, but i cant for the life of me, get the output from the function into the main function, not even to a console.log.

 

Is there any way to use the stdout of the shell_process in the main app?

 

I can really use the help, it is holding me back so badly...

Thanks

[reniat]

You can do this using callbacks: https://nodejs.org/api/child_process.html#child_process_child_process_exec_command_options_callback

an example which just calls ls of the current directory and prints it to the console:
 

const exec = require('child_process').exec;

function example() {
    exec('ls', (error, stdout, stderr) => {
        if (error) {
            console.log(stderr);
        }
        else {
            console.log(stdout);
        }
    });
}
example();