nodejs c++ function

gistfile1.cpp

static Handle<Value> GetPwUid(const Arguments& args) {
  HandleScope scope;

  if (args.Length() < 1) {
    return ThrowException(Exception::Error(
      String::New("getpwuid requires 1 argument")));
  }

  int uid;

  if (args[0]->IsNumber()) {
    uid = args[0]->Int32Value();
  } else {
    return ThrowException(Exception::Error(
      String::New("getpwuid argument must be a number")));
  }

  struct passwd *pwd;

  if ((pwd = getpwuid(uid)) == NULL && errno != 0) {
    return ThrowException(ErrnoException(errno, "getpwuid"));
  }

  if (pwd == NULL) {
    return Null();
  }

  Local<Object> pwd_object = Object::New();
  pwd_object->Set(String::NewSymbol("pw_name"), String::New(pwd->pw_name));
  pwd_object->Set(String::NewSymbol("pw_uid"), Integer::New(pwd->pw_uid));
  pwd_object->Set(String::NewSymbol("pw_gid"), Integer::New(pwd->pw_gid));
  pwd_object->Set(String::NewSymbol("pw_dir"), String::New(pwd->pw_dir));
  pwd_object->Set(String::NewSymbol("pw_shell"), String::New(pwd->pw_shell));

  return scope.Close(pwd_object);
}