nodejs fork

fork.js

const
  fs = require('fs'),
  child_process = require('child_process');

var workers = [];

for(var i=0; i<5; i++) {
  var worker = child_process.fork("lib/ExportWorker.js", [i]);
  workers.push(worker);
  console.log('Worker PID: ' + worker.pid);

  worker.on('error', function (err) {
    console.log('Exit on error: ', err);
  });

  worker.on('close', function (code) {
    console.log('Child process (' + worker.pid + ') exited with code: ' + code);
  });
}

process.on('SIGHUP',function(){
  for(var i=0; i < workers.length; i++){
    console.log('Sending SIGHUP to child process: ' + workers[i].pid)
    workers[i].kill('SIGHUP');
  }
});

process.on('SIGTERM',function(){
  for(var i=0; i < workers.length; i++){
    console.log('Sending SIGTERM to child process: ' + workers[i].pid)
    workers[i].kill('SIGTERM');
  }
  process.exit(1);
});

shell.md

node fork.js

Worker PID: 43248
Worker PID: 43249
Worker PID: 43250
Worker PID: 43251
Worker PID: 43252

shell2.md

ps aux |grep [n]ode

kpettijohn      43252   0.0  0.3  3113020  54716 s009  S+    7:06PM   0:00.40 /usr/local/bin/node lib/ExportWorker.js 4
kpettijohn      43251   0.0  0.3  3113020  54680 s009  S+    7:06PM   0:00.39 /usr/local/bin/node lib/ExportWorker.js 3
kpettijohn      43250   0.0  0.3  3113020  54708 s009  S+    7:06PM   0:00.39 /usr/local/bin/node lib/ExportWorker.js 2
kpettijohn      43249   0.0  0.3  3113020  54808 s009  S+    7:06PM   0:00.39 /usr/local/bin/node lib/ExportWorker.js 1
kpettijohn      43248   0.0  0.3  3113020  54752 s009  S+    7:06PM   0:00.39 /usr/local/bin/node lib/ExportWorker.js 0
kpettijohn      43247   0.0  0.1  3054064  14288 s009  S+    7:06PM   0:00.05 node fork.js

const
  fs = require('fs'),
  child_process = require('child_process');

var workers = [];

for(var i=0; i<5; i++) {
  var worker = child_process.fork("lib/ExportWorker.js", [i]);
  workers.push(worker);
  console.log('Worker PID: ' + worker.pid);

  worker.on('error', function (err) {
    console.log('Exit on error: ', err);
  });
}

process.on('SIGTERM',function(){
  for(var i=0; i < workers.length; i++){
    workers[i].kill('SIGTERM');
  }
  process.exit(1);
});

Nice! Updated with your changes!