xnoop(3x11) xfree86 man page | unix.com

XNoOp(3X11)							  XLIB FUNCTIONS						       XNoOp(3X11)

NAME
       XNoOp - No Operation

SYNTAX
       int XNoOp(Display *display);

ARGUMENTS
       display	 Specifies the connection to the X server.

DESCRIPTION
       The XNoOp function sends a NoOperation protocol request to the X server, thereby exercising the connection.

SEE ALSO
       Xlib - C Language X Interface

XFree86 							   Version 4.7.0						       XNoOp(3X11)