Re: How to reconnect to a new X Server

[Moon Elf]

On 2013-05-22, Sebastian Reitenbach <sebastia@l00-bugdead-prods.de> wrote:
> Hi,
>
> working with Riccardo on GAPs loginpanel, made some progress, but ran into 
> trouble now.
>
> What I do is starting the X Server, before I then start the loginpanel 
> application.
> Then the loginpanel actually has an X server running, where it can connect to.
>
> So far, that works well. I can login. When I logout, then I am killing the X 
> server, and
> want to restart it, and spawn the loginpanel again.
>
> First I tried in loginpanels main function:
>
>    while (1)
>      {
>        [XManager startXServer];
>        putenv("DISPLAY=:0.0");
>
>        NSApplicationMain(argc, argv);
>        
>      }
>
>
> That probably was too naive from me thinking it might work ;) Reading up 
> NSApplication
> documentation, I see that everything after NSApplicationMain(argc, argv); 
> will not be 
> exectuted, so the while loop will only runs once :(
>
> Anyways, then I tried to start the XServer again, after I teared it down.
> That works so far, but when the loginpanel wants to reset its window on the X 
> server, 
> I see it crying on the console, that the connection to the XServer broke:
>
> X connection to :0.0 broken (explicit kill or server shutdown)
>
> Even if there is a new server spawned already on the same display.
>
> Is there a way to tell the application that the X Server disappeared, and it
> should reconnect to the new one? Or tell it to kind of respawn itself?
>
> cheers,
> Sebastian
>
>
I think you better use the C interface to X, I've written a small self-managed
window app which displays on an X server, the code is here :
http://sf.net/projects/jackassbotchx/

You can also try to read the Xlib programming manual.

Then, when using while (1) { /**/ } try to use an interrupt such as an XEvent
(see my tarballed code above) or custom items.

ME

-- 
Member of the DR rogue circle. 
Search and you will find.