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Simulate Key Press

/ Published in: C
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<pre>
To compile
$ gcc -lXtst -lX11 Util_KeyPressSimulator.c

To create shared library
$ gcc -lXtst -lX11 -c Util_KeyPressSimulator.c -o Util_KeyPressSimulator.o
$ gcc -lXtst -lX11 -shared -o Util_KeyPressSimulator.so Util_KeyPressSimulator.o
</pre>

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  1. #include <X11/Xlib.h>
  2. #include <X11/keysym.h>
  3. #include <X11/extensions/XTest.h>
  4.  
  5. #define PRESS_UP	0
  6. #define PRESS_DOWN	1
  7. #define PRESS_LEFT	2
  8. #define PRESS_RIGHT	3
  9. #define PRESS_ENTER	4
  10. #define PRESS_ESC	5
  11. #define PRESS_HOME	6
  12.  
  13.  Display *display;
  14.  unsigned int keycode;
  15.  
  16.  int press(int key){
  17. 	display = XOpenDisplay(NULL);
  18.  
  19. 	if(key == PRESS_UP)
  20. 		keycode = XKeysymToKeycode(display, XK_Up);
  21. 	else if(key == PRESS_DOWN)
  22. 		keycode = XKeysymToKeycode(display, XK_Down);
  23. 	else if(key == PRESS_LEFT)
  24. 		keycode = XKeysymToKeycode(display, XK_Left);
  25. 	else if(key == PRESS_RIGHT)
  26. 		keycode = XKeysymToKeycode(display, XK_Right);
  27. 	else if(key == PRESS_ENTER)
  28. 		keycode = XKeysymToKeycode(display, XK_Return);
  29. 	else if(key == PRESS_ESC)
  30. 		keycode = XKeysymToKeycode(display, XK_Escape);
  31. 	else if(key == PRESS_HOME)
  32. 		keycode = XKeysymToKeycode(display, XK_Home);
  33.  
  34. 	XTestFakeKeyEvent(display, keycode, True, 0);
  35. 	XTestFakeKeyEvent(display, keycode, False, 0);
  36. 	XFlush(display);
  37. 	return 0;
  38. }
  39.  
  40. int main(int argc, char *argv[]){
  41. 	press(PRESS_UP);
  42. }

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