What command line tools exist to list and manage X server grabs? (That's grab as in key and pointer grabs, i.e. restricting the use of a particular key or mouse button to a particular application, or constricting the mouse pointer to remain in a particular screen area.) I'm looking for a hypothetical
xgrab utility that would show things like
Key 0x00f00ba5 0x123 0 Button 0x00f00ba5 2 Pointer 0x00abcdef
meaning that there has been a call to
XGrabKey(display, 0x123, 0, 0x00f00ba5, ...) and so on with
XGrabServer (if possible). The display format doesn't matter, what I want is some way to see who's grabbing what, and possibly some way of revoking these grabs (if it's possible, I'm not sure if the X11 API allows that).