What does XCloseDisplay return?

xlib, xorg

Solution

I looked in the source code (`lib/X11/ClDisplay.c`)

It says:

return 0;

So there's nothing you can really do with the return value.

Problem

I can see from various documentations that `XCloseDisplay` returns an integer, which I suspect to be an error code. What should I do with this value? Is it an error code? If so how do I handle the error?

Original source