Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 3744
  • Last Modified:

X connection to :0.0 broken (explicit kill or server shutdown)

I obtain the error message 'X connection to :0.0 broken (explicit kill or server shutdown)' when I close an X graphical window using the window manager close button.

The graphical application is written in C and uses X11 library.

Applications written using MOTIF library doesn't do so, they seem to close cleanly.

How can I get rid of this?
What event have I to manage?
0
mliberi
Asked:
mliberi
1 Solution
 
zou3Commented:
Hi,
You have to gracefully handle WM_DELETE_WINDOW protocol
message from a window manager.
For this purpose, you can use XSetWMProtocols() and check ClientMessage event.

Please refer to the following sample program.
(There's no XSelectInput() in this sample since ClientMessage
event is not maskable. You may need to call it usually, though)

Xtoolkit used by Motif handles these stuff implicitly.

Compiling/linking is as simple as;
cc -I<X11 inc path> -L<X11lib path> -o prog prog.c  -lX11

------------------ >8 ---------------------
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>

main(void)
{
    Display *d;
    Window w;
    XEvent event;
    Atom    WM_DELETE_WINDOW;

    d = XOpenDisplay(0);
    w = XCreateSimpleWindow(d, RootWindow(d, 0), 0, 0, 100, 100, 2, 0, 1);

    WM_DELETE_WINDOW = XInternAtom(d, "WM_DELETE_WINDOW", True);
    (void)XSetWMProtocols(d, w, &WM_DELETE_WINDOW, 1);

    XMapWindow(d, w);

    while (True) {
        if (XPending(d)) {
            XNextEvent(d, &event);
            switch (event.type) {
            case ClientMessage:
                if (event.xclient.data.l[0] == WM_DELETE_WINDOW) {
                    fprintf(stderr, "ClientMessage with WM_DELETE_WINDOW\n");
                    exit(0);
                }
                break;
            default:
                break;
            }
        }
    }
}

0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Tackle projects and never again get stuck behind a technical roadblock.
Join Now