(Default=`process.argv.slice(2)`)

* `silent` {Boolean} whether or not to send output to parent's stdio.

(Default=`false`)

* `stdio` {Array} Configures the stdio of forked processes. Because the

cluster module relies on IPC to function, this configuration must contain an

`'ipc'` entry. When this option is provided, it overrides `silent`.

* `uid` {Number} Sets the user identity of the process. (See setuid(2).)

* `gid` {Number} Sets the group identity of the process. (See setgid(2).)

(Default=`process.argv.slice(2)`)

* `silent` {Boolean} whether or not to send output to parent's stdio.

(Default=`false`)

* `stdio` {Array} Configures the stdio of forked processes. When this option

is provided, it overrides `silent`.

`setupMaster` is used to change the default 'fork' behavior. Once called,

the settings will be present in `cluster.settings`.

env: workerEnv,

silent: cluster.settings.silent,

execArgv: execArgv,

stdio: cluster.settings.stdio,

gid: cluster.settings.gid,

uid: cluster.settings.uid

});

'use strict';

const common = require('../common');

const assert = require('assert');

const cluster = require('cluster');

const net = require('net');

if (cluster.isMaster) {

const buf = Buffer.from('foobar');

cluster.setupMaster({

stdio: ['pipe', 'pipe', 'pipe', 'ipc', 'pipe']

});

const worker = cluster.fork();

const channel = worker.process.stdio[4];

let response = '';

worker.on('exit', common.mustCall((code, signal) => {

assert.strictEqual(code, 0);

assert.strictEqual(signal, null);

}));

channel.setEncoding('utf8');

channel.on('data', (data) => {

response += data;

if (response === buf.toString()) {

worker.disconnect();

}

});

channel.write(buf);

} else {

const pipe = new net.Socket({ fd: 4 });

pipe.unref();

pipe.on('data', (data) => {

assert.ok(data instanceof Buffer);

pipe.write(data);

});

}