Using .spawn() is similar to .exec() in general terms. Let's now use a separate process to read a directory and send its results back. We will be passing the path we want to process using a stream, and we'll get the list of found files also through streaming.

To start, let's have the main code, which will spawn a process:

// Source file: src/process_spawn.js

const path = require("path");
const { spawn } = require("child_process");

const child = spawn("node", [path.resolve("out/process_spawn_dir.js")]);

child.stdin.write("/home/fkereki");

child.stdout.on("data", data => {
    console.log(String(data));
});

child.stdout.on("end", () => {
    child.kill();
});

To finish, we need the child process, which would be as follows:

// Source file: src/process_spawn.js

const fs = require("fs");

process.stdin.resume();

process.stdin.on("data", path => {
    // Received a path to process
    fs
        .readdirSync(path)
        .sort((a, b) => a.localeCompare(b, [], { sensitivity: "base" }))
        .filter(file => !file.startsWith("."))
        .forEach(file => process.stdout.write(file + "
"));

    process.stdout.end();
});