gistfile1.c

    pthread_t sysinthread;
    pthread_create(&sysinthread, NULL, sysin, NULL);

    while(!running)
    {
        usleep(100000);
    }

    while(running)
    {
        update_screen();
        usleep(10);
    }

    return 0;
}







void* sysin(void* arg)
{
    XEvent evt;
    while(1);
    {
        XNextEvent(dsp, &evt);
        if (evt.type == KeyPress)
        {
            screen[cursor++] = scribble;
            running = 1;
        }
   }
}