Node is not shutting down on ros::ok()

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Hi all,

Mine is just a noob question about the expected behaviour of ros::ok() function. I've written this very simple piece of code :

int main(int argc, char **argv)
{
    ros::init(argc, argv, "bot");
    ros::NodeHandle nh("~");

    ros::Publisher odo_pub = nh.advertise<sensor_msgs::JointState>("odometry", 1000);
    ros::Subscriber cmd_sub = nh.subscribe(sub.c_str(), 1000, chatterCallback);

    // Define the odometry msg
    sensor_msgs::JointState msg;
    msg.header.frame_id="bot";
    msg.position.resize(4);
    msg.velocity.resize(4);
    msg.effort.resize(4);

    while( ros::ok())
    {
        ROS_INFO("In loop %d",ros::ok());

        msg.header.stamp=ros::Time::now();
        odo_pub.publish(msg);
        ros::spinOnce();
    }
    ROS_INFO("Exit");

    return 0;
}

Should the node exit when I Ctrl-c the ros framework (by killing the terminal on which roscore has been started)? Thanks!

P.S. I'm running ROS hydro on Ubuntu 12.04.2 LTS