text: const fs = require('fs');
  const child_process = require('child_process');
  
  for (var i = 0; i < 3; i++) {
      var workerProcess = child_process.exec('node support.js ' + i,
          function(err, stdout, stderr) {
              if (err) {
                  console.log(err.stack);
                  console.log('Error code:' + err.code);
                  console.log('signal received:' + err.signal);
              }
              console.log('stdout:' + stdout);
              console.log('stderr:' + stderr);
          });
  
      workerProcess.on('exit', function(code) {
          console.log('子进程已退出，退出码 ' + code);
      });
  }