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5403 discussions

session files in /tmp
by yk+bug+x2go＠64.re 21 Feb '18

21 Feb '18

On Linux, the X2Go server stores the session files in /tmp/.x2go-* . Now, whenever a coworker leaves for vacation, those files are not getting updated and thus get deleted by tmpwatch on CentOS 6 or systemd-tmpfiles on CentOS 7; when the coworker comes back and tries to resume the session, it goes into failed mode since those files are gone, with no possibility of recovery. The current workaround that I set up is to exclude /tmp/.x2go-* from clean-up (e.g.[1]), but to prevent having to do it on every machine to which we want to connect, it would be nice to move the folder to a place that is not cleaned (at least as often). Although the Linux Filesystem Hierarchy Standard (FHS) has been widely disputed, it seems to be an admitted convention to put PID/lock/socket files and the like in /run (or /var/run). Is there a specific reason why those files are in /tmp and not in /var? [1] On CentOS 7 for systemd-tmpfiles: # cat /etc/tmpfiles.d/x2go.conf #Type Path Mode UID GID Age Argument # Exclude X2Go session files x /tmp/.x2go-*

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Bug#1261: Connect to local desktop: No protocol specified
by Petr Matula 21 Feb '18

21 Feb '18

Package: x2goserver Version: x2goserver I got a problem with x2go from https://download.opensuse.org/repositories/X11:/RemoteDesktop:/x2go/openSUS… When i try to "connect to local desktop" i receive message "no protocol specified" only. Starting single aplication is OK. ----------------------------------------------------------------------------------- x2go-INFO-1 "Starting X2Go Client..." x2go-WARNING-1 "Non-fatal: can't load translator: :/i18n/x2goclient_cs_cz" x2go-WARNING-1 "Trying to load language with lower preference, if existent." x2go-WARNING-1 "Non-fatal: can't load translator: :/i18n/qt_cs_cz" x2go-WARNING-1 "Trying to load language with lower preference, if existent." x2go-INFO-3 "Started X2Go Client." x2go-DEBUG-../src/onmainwindow.cpp:518 "$HOME=/home/petr" x2go-DEBUG-../src/onmainwindow.cpp:2279 Reading 1 sessions from config file. x2go-DEBUG-../src/sessionbutton.cpp:341 Creating QPixmap with session icon: ":/img/icons/128x128/x2gosession.png". x2go-DEBUG-../src/onmainwindow.cpp:2759 Creating QPixmap with session icon: '":/img/icons/128x128/x2gosession.png"'. x2go-INFO-8 "Starting connection to server: localhost:22" x2go-DEBUG-../src/onmainwindow.cpp:2860 Starting new ssh connection to server:"localhost":"22" krbLogin: false x2go-DEBUG-../src/sshmasterconnection.cpp:175 SshMasterConnection, host "localhost"port 22user "petr"useproxy falseproxyserver ""proxyport 22 x2go-DEBUG-../src/sshmasterconnection.cpp:212 Starting SSH connection without Kerberos authentication. x2go-DEBUG-../src/sshmasterconnection.cpp:216 SshMasterConnection, instance SshMasterConnection(0x5598a6517650) created. x2go-DEBUG-../src/sshmasterconnection.cpp:452 SshMasterConnection, instance SshMasterConnection(0x5598a6517650) entering thread. x2go-DEBUG-../src/sshmasterconnection.cpp:488 libssh not initialized yet. Initializing. x2go-DEBUG-../src/sshmasterconnection.cpp:799 cserverAuth x2go-DEBUG-../src/sshmasterconnection.cpp:814 state: 1 x2go-DEBUG-../src/sshmasterconnection.cpp:989 Challenge authentication requested. x2go-DEBUG-../src/sshmasterconnection.cpp:867 Have prompts: 1 x2go-DEBUG-../src/sshmasterconnection.cpp:873 Prompt[0]: |Password: | x2go-DEBUG-../src/sshmasterconnection.cpp:879 Password request x2go-DEBUG-../src/sshmasterconnection.cpp:867 Have prompts: 0 x2go-DEBUG-../src/sshmasterconnection.cpp:950 Challenge authentication OK. x2go-DEBUG-../src/sshmasterconnection.cpp:664 User authentication OK. x2go-DEBUG-../src/onmainwindow.cpp:2957 SSH connection established. x2go-DEBUG-../src/onmainwindow.cpp:3266 Continue normal X2Go session x2go-DEBUG-../src/sshprocess.cpp:199 Executing remote command via SshProcess object 0: "export HOSTNAME x2golistdesktops" x2go-DEBUG-../src/sshprocess.cpp:204 this=SshProcess(0x5598a663cfb0) Running masterCon- addChannelConnection(this, ' "85b698aa-3788-4045-b33e-612088853fc2" ', ' "bash -l -c 'echo "X2GODATABEGIN:85b698aa-3788-4045-b33e-612088853fc2"; export PATH="/usr/local/bin:/usr/bin:/bin"; export TERM="dumb"; export HOSTNAME x2golistdesktops; echo "X2GODATAEND:85b698aa-3" '); x2go-DEBUG-../src/sshmasterconnection.cpp:1325 Locking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:1327 Passing new channel conenction object to channelConnections. x2go-DEBUG-../src/sshmasterconnection.cpp:1329 Unlocking SSH channel connection MUTEX. x2go-DEBUG-../src/sshmasterconnection.cpp:1517 Creating new channel. x2go-DEBUG-../src/sshmasterconnection.cpp:1521 New channel:0x7f0174014ae0 x2go-DEBUG-../src/sshmasterconnection.cpp:1552 Executing remote: "bash -l -c 'echo "X2GODATABEGIN:85b698aa-3788-4045-b33e-612088853fc2"; export PATH="/usr/local/bin:/usr/bin:/bin"; export TERM="dumb"; export HOSTNAME x2golistdesktops; echo "X2GODATAEND:85b698aa-3788-4045-b33e-612088853fc2";'" x2go-DEBUG-../src/sshmasterconnection.cpp:1575 New exec channel created. x2go-DEBUG-../src/sshmasterconnection.cpp:1624 EOF on channel 0x7f0174014ae0; SshProcess object: 0 x2go-DEBUG-../src/sshmasterconnection.cpp:1747 EOF sent. x2go-DEBUG-../src/sshmasterconnection.cpp:1751 Channel closed. x2go-DEBUG-../src/sshprocess.cpp:517 SSH finished: raw output (stdout): "X2GODATABEGIN:85b698aa-3788-4045-b33e-612088853fc2 X2GODATAEND:85b698aa-3788-4045-b33e-612088853fc2 " x2go-DEBUG-../src/sshprocess.cpp:523 Have stderr only, something must be wrong. x2go-DEBUG-../src/sshprocess.cpp:528 SSH finished: false - "Invalid MIT-MAGIC-COOKIE-1 keyNo protocol specified No protocol specified No protocol specified No protocol specified No protocol specified No protocol specified No protocol specified

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Question re: LXDE
by o1bigtenor 20 Feb '18

20 Feb '18

Greetings As LXDE seems to be morphing into LXQT I'm curious as to an ETA for a version of X2Go, the use of which I'm quite happy with, that is capable of utilizing LXQT? Please advise. Dee

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[pulseaudio] main.c: User-configured server at localhost:, refusing to start/autospawn.
by Robert Kudyba 20 Feb '18

20 Feb '18

This seems to happen a couple of times a week. We are on Fedora 27. and just upgraded to x2goserver-4.1.0.0-0.0x2go1.0.git20180129.1511.heuler.fc27.x86_64 Every so often the logs start filling up with these: Feb 9 09:28:33 erdos pulseaudio[2124]: [pulseaudio] main.c: User-configured server at localhost:41031, refusing to start/autospawn. Should we remind users to uncheck the audio box when logging in? I see there is bug 161, https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=161 and 1143, https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=1143 that are quite old but perhaps related. here's a 'ps -auwx | grep x2go' when this happens: user1 20652 0.0 0.0 116572 1696 ? Ss Feb06 0:00 /bin/bash /usr/bin/x2goruncommand 333 20569 user1-333-1517963407_stDMATE_dp32 50324 mate-session nosnd D user1 20756 0.0 0.0 32340 1116 ? S Feb06 0:00 /usr/bin/dbus-run-session /etc/x2go/Xsession user2 30305 0.0 0.0 116704 3232 ? Ss Feb08 0:00 bash -l -c echo "X2GODATABEGIN:216fe65b-1b56-4b0f-99b9-4f5fd0da8929"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; x2goresume-session user2-334-1518126156_stDXFCE_dp32 fullscreen adsl 16m-jpeg-9 us query 0 both; echo "X2GODATAEND:216fe65b-1b56-4b0f-99b9-4f5fd0da8929"; user2 30396 0.0 0.0 116572 3184 ? S Feb08 0:29 /bin/bash /usr/bin/x2goresume-session user2-334-1518126156_stDXFCE_dp32 fullscreen adsl 16m-jpeg-9 us query 0 both user3 31106 0.0 0.0 116572 1692 ? Ss Feb06 0:00 /bin/bash /usr/bin/x2goruncommand 331 30861 user3-331-1517954980_stDMATE_dp32 41031 mate-session nosnd D user3 31230 0.0 0.0 32340 1116 ? S Feb06 0:00 /usr/bin/dbus-run-session /etc/x2go/Xsession user2 32682 0.0 0.0 116704 3216 ? Ss Feb08 0:00 bash -l -c echo "X2GODATABEGIN:c04d2709-19ac-4774-8a7e-0dee1c5164d2"; export PATH="/usr/local/bin:/usr/bin:/bin";export TERM="dumb"; x2goresume-session user2-335-1518126319_stDMATE_dp32 fullscreen adsl 16m-jpeg-9 us query 0 both; echo "X2GODATAEND:c04d2709-19ac-4774-8a7e-0dee1c5164d2"; user2 32731 0.0 0n. .0 116572 3136 ? S Feb08 0:28 /bin/bash /usr/bin/x2goresume-session user2-335-1518126319_stDMATE_dp32 fullscreen adsl 16m-jpeg-9 us query 0 both You can see the server load gets a bit high: top - 09:29:24 up 6 days, 16:37, 4 users, load average: 2.22, 3.07, 2.84 Tasks: 383 total, 2 running, 295 sleeping, 0 stopped, 0 zombie %Cpu(s): 0.8 us, 0.5 sy, 1.6 ni, 87.0 id, 9.8 wa, 0.1 hi, 0.2 si, 0.0 st KiB Mem : 24670328 total, 502868 free, 2891660 used, 21275800 buff/cache KiB Swap: 40959996 total, 40601596 free, 358400 used. 21282084 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3026 20 0 157764 12240 4772 R 41.2 0.0 0:00.07 x2gogetagentsta So I'm forced to kill the PIDs. After restarting x2goserver: Feb 9 09:32:37 erdos /usr/sbin/x2gocleansessions[4477]: user3-331-1517954980_stDMATE_dp32, pid 30861: cleaning up stale X11 socket file: /tmp/.X11-unix/X331 Feb 9 09:32:37 erdos /usr/sbin/x2gocleansessions[4477]: user3-331-1517954980_stDMATE_dp32, pid 30861: cleaning up stale X11 lock file: /tmp/.X331-lock Side note, why does /var/log/dnf.log have these nightly? DEBUG Unknown configuration option: protect = 0 in /etc/yum.repos.d/x2go.repo

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Bug#1258: Linux is affected
by Mike DePaulo 20 Feb '18

20 Feb '18

I can confirm that Linux is affected (including on 4.1.1.0 specifically), and that the commit fixes it.

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Bug#1259: Debian package from heuler repository fails to install
by Martin 19 Feb '18

19 Feb '18

Package: python-x2go Version: 0.5.99.0-0x2go1~git20180112.1367+9999.heuler.1 "apt-get install python-x2go" fails with Setting up python-x2go (0.5.99.0-0x2go1~git20180112.1367+9999.heuler.1) ... File "/usr/lib/python2.7/dist-packages/x2go/tests/test_printing.py", line 46 print(_printing, file=tf) ^ SyntaxError: invalid syntax dpkg: error processing package python-x2go (--configure): installed python-x2go package post-installation script subprocess returned error exit status 101 Errors were encountered while processing: python-x2go E: Sub-process /usr/bin/dpkg returned an error code (1) The bug was introduced by commit 327fa5e5f09d7fabb4d0052de1b2876c852797e1 (Port to Python3). The attached patch restores compatibility with Python 2.6+. Regards Martin

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Bug#883: Bug #883 is back - this time, on Linux
by Stefan Baur 19 Feb '18

19 Feb '18

Hi everyone, I hate to say this, but ... bug #883 is back. Somehow. And this time, on Linux. Situation: I run a Debian-Jessie-based X2Go-ThinClientEdition, in Mate-MiniDesktop, amd64 flavor. Mate-MiniDesktop means that there is a local desktop, Firefox, xterm, etc., and X2GoClient is set to run in Published Applications mode. Whenever I try to start LibreOffice as a Published Application, it pretty much instantly snaps to fullscreen and the window decoration is gone, so there's no way to un-maximize or resize the window (Pressing Alt+Space does bring up a menu, but it doesn't do anything). It does not happen on Windows. So I tried to resize the LibreOffice window to a size way smaller than the screen while running windows, then I closed the session, and started a new one via X2Go-TCE. Sadly, even though the window appears in the correct size for the fraction of a second, it remains without window decoration, and instantly resizes to full screen again. :'( Starting on Windows, keeping the window in a less-than-fullscreen-sized size, suspending the session, and resuming it on Linux works, though. At first, I thought it might be a xinerama issue, but it also happens with xinerama=false on Linux. Any idea as to what could be causing this? Kind Regards, Stefan Baur -- BAUR-ITCS UG (haftungsbeschränkt) Geschäftsführer: Stefan Baur Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364 Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243

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Bug#855: Update on file deletion issue in portable mode
by Stefan Baur 19 Feb '18

19 Feb '18

Package: x2goclient Version: 4.1.0.0 Severity: grave When you install X2GoClient on Windows in portable mode, in the directory some_dir\x2goclient, and create a batch file to start it in porable mode as some_dir\x2goclient.cmd, with the following content: @echo off cd /d %~dp0\x2goclient start "X2GoClient" x2goclient.exe --portable Then, either upon connecting to a server (causing ssh\known_hosts to be created/updated), or upon closing of x2goclient, the content of these directories gets deleted (save for the file ssh\known_hosts): some_dir\x2goclient\.ssh some_dir\x2goclient\ssh Obviously, this is NOT good, because people will be tempted to store their private keys in that directory, only to find them gone afterwards. My guess is that it hits .ssh as well because .ssh is no regular FAT file name, but rather one that can only be created in cmd.exe with "md .ssh", and probably only works on VFAT, not regular FAT, so a routine looking to match ssh that isn't VFAT-safe will hit .ssh instead. Could it be that we have a bug in x2goclient that purges the ssh directory whenever known_hosts is accessed for writing, or similar? Kind Regards, Stefan Baur -- BAUR-ITCS UG (haftungsbeschränkt) Geschäftsführer: Stefan Baur Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364 Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243

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Bug#1258: X2Go issue (in src:x2goclient) has been marked as pending for release
by Mike DePaulo 19 Feb '18

19 Feb '18

tag #1258 pending fixed #1258 4.1.1.2 thanks Hello, X2Go issue #1258 (src:x2goclient) reported by you has been fixed in X2Go Git. You can see the changelog below, and you can check the diff of the fix at: http://code.x2go.org/gitweb?p=x2goclient.git;a=commitdiff;h=36cad1d The issue will most likely be fixed in src:x2goclient (4.1.1.2). light+love X2Go Git Admin (on behalf of the sender of this mail) --- commit 36cad1de8183b90d66acfe6673474a75e488d852 Author: Mike DePaulo <mikedep333(a)gmail.com> Date: Sun Feb 18 23:34:31 2018 -0500 Update debian/changelog that commit "Do not attempt to perform Interaction with SSH Server" Fixes: #1258 diff --git a/debian/changelog b/debian/changelog index a0d78f4..2d72061 100644 --- a/debian/changelog +++ b/debian/changelog @@ -5,6 +5,7 @@ x2goclient (4.1.1.2-0x2go1) UNRELEASED; urgency=medium - src/sshmasterconnection.cpp: Do not attempt to perform Interaction with SSH Server (e.g. for changing expired password) when using GSSAPI/Kerberos because the interaction code does not support it yet. + Fixes: #1258 - Windows: Update PuTTY from 0.68 to 0.70, which fixes PuTTY vulns vuln-indirect-dll-hijack-2 & vuln-indirect-dll-hijack-3. Note that x2goclient was only ever affected if the permissions on the

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Bug#1258: x2goclient hangs when connecting with Kerberos auth
by Mike DePaulo 19 Feb '18

19 Feb '18

Package: x2goclient Version: 4.1.1.0 When attempting to connect to an X2Go server with GSSAPI/Kerberos auth, x2goclient hangs indefinitely. This was observed with nightly builds for Windows, and was assumed to be Windows-specific. The fix has already been committed to master. I will update master with another commit (& change to debian/changelog) stating that this was fixed: commit 7cbd8d525309edb8bd05d27ec57ac72e2d8c90e8 Author: Mike DePaulo <mikedep333(a)gmail.com> Date: Sun Feb 18 19:52:22 2018 -0500 Do not attempt to perform Interaction with SSH Server (e.g. for changing expired password) when using GSSAPI/Kerberos because the interaction code does not support it yet. But as I was fixing it, I noticed that Linux & Mac OS X are probably affected too. The cause of the issue is that the new Interaction Dialog feature introduced by this commit contains libssh-specific function calls, but we use PuTTY binaries on Windows & the OpenSSH ssh client binary on Linux/MacOS for GSSAPI/Kerberos: commit 68bbf328132125eaad5c53b0ac82490bf818e42e Author: Oleksandr Shneyder <o.shneyder(a)phoca-gmbh.de> Date: Wed May 10 15:22:11 2017 +0200 Interaction with SSH server (for example for changing expired password). Fixes: #592. And the "fix" for this is to bypass that new feature when GSSAPI/Kerberos auth is used. I will open up a separate issue about the fact that the Interaction Dialog feature does not work with GSSAPI/Kerberos. -Mike

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