DOKK / manpages / debian 10 / libx11-doc / XUngrabServer.3.en
XGrabServer(3) XLIB FUNCTIONS XGrabServer(3)

XGrabServer, XUngrabServer - grab the server

int XGrabServer(Display *display);

int XUngrabServer(Display *display);

Specifies the connection to the X server.

The XGrabServer function disables processing of requests and close downs on all other connections than the one this request arrived on. You should not grab the X server any more than is absolutely necessary.

The XUngrabServer function restarts processing of requests and close downs on other connections. You should avoid grabbing the X server as much as possible.

XGrabButton(3), XGrabKey(3), XGrabKeyboard(3), XGrabPointer(3)
Xlib - C Language X Interface

libX11 1.6.7 X Version 11