[X2go-Dev] x2godesktopsharing integration into x2goserver

[Mike Gabriel]

Hi all,

yesterday I have been working on the C++ code in x2godesktopsharing.

To make sure that x2godesktopsharing really gets shutdown on  
x2goterminate-session, I have added a script to the x2godesktopsharing  
package that detects the corresponding x2godesktopsharing process for  
a given session $X2GO_SESSION. This script  
,,x2godesktopsharing-terminate" will be exectuted by  
,,x2goterminate-session".

This brought up the next question: how do we want to handle  
x2godesktopsharing while a session is suspended. This older versions  
of X2go (I think) this has been possible. I consider this as a  
security problem and something that most users do not want. Imagine  
the scenario:

   o start x2go session
   o start x2godesktopsharing
   o allow user foo to share your desktop and remember this setting permanently
     (via .x2godesktopsharing/settings)
   o suspend your session (and x2godesktopsharing continues to offer desktop
     sharing... :-( )
   o user foo tries to connect to your desktop while you are away (while
     your session is suspended
   o -> this is YUK!

So what I have done is this:

   o on session suspend, terminate x2godesktopsharing and remember that it was
     running, place a server-side empty file ,,resume-desktopsharing'' into

       $HOME/.x2go/C-$X2GO_SESSION/

   o on session resume, check if that file is there and if so, launch a new
     instance of x2godesktopsharing, with sharing mode set to disabled.

Feedback, comments?

Mike

PS: I have just looked at my commits from yesterday and it feels like  
I should rename the provided scripts in this way:

   x2godesktopsharing-terminate -> x2goterminate-desktopsharing
   x2godesktopsharing-suspend -> x2gosuspend-desktopsharing
   etc.


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