grab-keyboard.c

#include "grab-keyboard.h"

static int ApplicationErrorHandler(Display *display, XErrorEvent *theEvent)
{
  exit(127); /* clearly we aren't calling the error handler :-( */
    (void) fprintf(stderr,
     "Ignoring Xlib error: error code %d request code %d\n",
     theEvent->error_code,
     theEvent->request_code) ;

    /* No exit! - but keep lint happy */

    return 0 ;
}

int main(int argc, char **argv)
{
  Display *dpy;
  int x=0;
  XEvent ev;

  if((dpy = XOpenDisplay(NULL)) == NULL) {
    perror(argv[0]);
    exit(1);
  }

  XSetErrorHandler(&ApplicationErrorHandler);
  XGrabKeyboard(dpy, 0x3c00022,
      False, GrabModeAsync, GrabModeAsync, CurrentTime);

  for (x=0;x<=10; x++) {
    XNextEvent(dpy, &ev);

    if ( ev.type == KeyPress || ev.type == KeyRelease ) {
      ev.xkey.window = 0x3c00022;
      printf("%d\n", XSendEvent(dpy, 0x3c00022, False, NoEventMask, &ev));
      XSync(dpy, 1);
    }
  }

  XUngrabKeyboard(dpy, CurrentTime);
}