#include <stdio.h>
#include <stdlib.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Intrinsic.h>

Display *display;

void sendsym(KeySym sym)
{
  Window focus = 0;
  int revert = 0;
  XKeyEvent event;

  XGetInputFocus(display, &focus, &revert);

  event.display = display;
  event.window = focus;
  event.subwindow = None;
  event.time = CurrentTime;
  event.x = 1;
  event.y = 1;
  event.x_root = 1;
  event.y_root = 1;
  event.same_screen = 1;
  event.state = 0;

  event.keycode = sym;

  event.type = KeyPress;
  XSendEvent(event.display, event.window,1, KeyPressMask,
             (XEvent *)&event);

  event.type = KeyRelease;
  XSendEvent(event.display, event.window,1, KeyReleaseMask,
             (XEvent *)&event);
}

int main(int argc, char *argv[])
{
  char *display_name;

  XrmInitialize();

  display_name = XDisplayName(NULL);
  display = XOpenDisplay(display_name);
  if (display == NULL)
  {
    perror("Error opening display");
    exit(EXIT_FAILURE);
  }

  sendsym(XK_Up);

  XFlush(display);
  XCloseDisplay(display);
  return EXIT_SUCCESS;
}