Hi Alex,

I have recently added means to set the clipboard (security) mode in
X2Go sessions. That there is no way of restricting clipboard
functionality in X2Go sessions has been quite an issue a while back on
our mailing list and on the Debian bug tracker.

So, what I have done...

NX:

First, a patch for NX was necessary [1]. This patch adds the clipboard
NX option to nxagent/x2goagent. There was some code for that already
present in NX, but it looked like the feature never got finished (or
other).

X2Go Server:

Second, I added a new cmdline arg to x2gostartagent and
x2goresume-session [2]. Clients, that want to set the clipboard mode,
have to send "both", "server", "client", or "none" as 10th cmdline
parameter to x2gostartagent and as 8th cmdline parameter to
x2goresume-session. If the client does not send that field, X2Go
Server uses the default mode ("both").

If you want to test if an X2Go Server supports the clipboard mode
feature, you can query

$ x2gofeature X2GO_CLIPBOARD_MODES ok

Client-side:

Third, and this is what this mail is about, X2Go Client needs to send
the clipboard mode to the server (x2gostartagent, x2goresume-session).
In Python X2Go / PyHoca-GUI, I have already implemented this.

Python X2Go stores the clipboard information in ~/.x2goclient/sessions
under the option name "clipboard=<str>" where its values can be
"both", "server", "client", "none".

Relevant commits are: [3], [4], [5].

In X2Go Client's session profile window, the clipboard mode has to be
made configurable.

Whenever you have time, can you take a look at that? Thanks.

light+love, Mike

NX:

[1]
http://code.x2go.org/gitweb?p=nx-libs.git;a=commitdiff;h=0cf283dca109ff29e18...

X2Go Server:

[2]
http://code.x2go.org/gitweb?p=x2goserver.git;a=commitdiff;h=669b3aabb8f574a2...

Python X2Go (combine the two commits to make sense):

[3]
http://code.x2go.org/gitweb?p=python-x2go.git;a=commitdiff;h=08ff742334427cb... [4]
http://code.x2go.org/gitweb?p=python-x2go.git;a=commitdiff;h=2aa779efe39a045...

PyHoca-GUI (session profile manager):

[5]
http://code.x2go.org/gitweb?p=pyhoca-gui.git;a=commitdiff;h=d9d413b00fc92e35...

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