Control: reassign -1 x2goserver Control: found -1 4.0.1.18

Hi Stefan,

On Sa 11 Okt 2014 11:03:48 CEST, Mike Gabriel wrote:

Package: x2gobroker Severity: important Version: 0.3.0.0

Since X2Go Server 4.0.1.16, all session relevant files moved to
/tmp/.x2go-<user>. In $HOME/.x2go there only is a symlink to the
session dir on /tmp.

This change breaks x2gobroker-agent in LOCAL mode (evoked on the
broker host itself, assuming all session files are available).

In LOCAL mode, x2gobroker-agent is evoked on the X2Go Broker host
itself and assumes that it can access all session files in
$HOME/.x2go/C-<session>.

But what it finds is a dangling symlink to a non-existent
C-<session> dir in /tmp/.x2go-<user>.

The wanted session dir, of course, can only be found on

X2Go-Server-node-N:/tmp/.x2go-<user>/C-<session>

This issue should actually be silenced (not really fixed, as it is not
fixable) in X2Go Server.

Most of the session manipulation happens via the X2Go Server node's
x2gocleansessions daemon script.

The x2golistsessions command (evoked by x2gobroker-agent), which
triggers the observed bug, does not necessarily need access to the
session state file. If it can gain access, it will check the session
state, and update the session DB, if the DB value differs from the
actual state in the session state file (the session state file should
be more up-to-date).

If we omit this DB update in x2golistsessions, we need to rely on a
working x2gocleansessions daemon, which should still be enough.

Thus, I will test for the existence of the state file in
x2golistsessions first and then execute the DB update code. If there
is no session state file, we should be clear, as well (and need to
rely on x2gocleansessions on the X2Go Server nodes).

Mike

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