does ros::ok return false if ros::init_options::NoSigintHandler

edit

does ros::ok always returns false irrespective of if signal handler is installed or not.? If I use ros::init_options::NoSigintHandler and use boost::asio::io_service io_service, how do I make sure that my node is terminated without escalating to SIGTERM. It never reaches to handler.

 int main( int argc , char** argv )
{
  ros::init(argc, argv, "name", ros::init_options::NoSigintHandler);
  boost::asio::io_service io_service;
 
// Construct a signal set registered for process termination.
  boost::asio::signal_set signals(io_service, SIGINT );
     signals.async_wait(
    &io_service
    {
      ROS_ERROR("inside signal handler");
      io_service.stop();
    });
 
boost::asio::spawn(io_service, {
    while(1);
 }
);
 
io_service.run();
  return 0;
}