node get functions

if ($2.indexOf(':') !== -1) {
  gpuid = split($2, ':');
  fs.getpwuid($2[0], function (err, resp) {
    // handle err
    fs.getgrgid($2[1], function (err, resp) {
      // checking and stuff
    });
  })
} else {
  fs.getpwuid($2, function (err, resp) {
    // stuff
  })
}