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X2goclient 3.99.0.0-0~94~lucid1 - core dump
by Fortier,Vincent [Montreal] 26 Jul '11

26 Jul '11

Used to work without any glitches using: ii x2goclient 3.01-5 x2goclient qt4 client But now using latest x2go client: [whoami@localhost ~]# dpkg -l | grep -i -e x2go -e nx ii libxcomp3 3.5.0-1-0~37~lucid1 NX X compression library ii lynx 2.8.8dev.2-1 Text-mode WWW Browser (transitional package) ii lynx-cur 2.8.8dev.2-1 Text-mode WWW Browser with NLS support (deve ii nxproxy 3.5.0-1-0~28~lucid1 NX X compression library ii pinentry-x2go 0.7.5.0-0~13~lucid1 Qt4-based PIN or pass-phrase entry dialog fo ii x2goclient 3.99.0.0-0~94~lucid1 X2go Client application (Qt4) I either get following message: "The remote proxy closed the connection while negotiating the session. This may be due to the wrong authentication credentials passed to the server" -- OR -- "The connection with the remote server was shut down. Please check the state of your network connection." -- OR -- It crashes with the following...: [whoami@localhost ~]# x2goclient ONMainWindow constructor Can't load translator (:/x2goclient_en_ca) ! Can't load translator :/qt_en_CA ONMainWindows constructor finished, home Directory is: "/net/wul/home/whoami" read 3 sessions from config file Have key, starting session start new ssh connection setting SSH DIR to "/net/wul/home/whoami/ssh" ssh connection ok continue normal x2go session Segmentation fault (core dumped) Note that this behaviour occurs with all Ubuntu builds... The old lenny based build works fine. - vin

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[PATCH] Allow users to edit their *own* sessions only
by Reinhard Tartler 25 Jul '11

25 Jul '11

previously, users could create sessions under wrong uids or delete sessions from other users. This patch implements prevents this by checking the userid of the caller with the session id. --- x2goserver/lib/x2gosqlitewrapper.pl | 23 ++++++++++++++++++++--- 1 files changed, 20 insertions(+), 3 deletions(-) diff --git a/x2goserver/lib/x2gosqlitewrapper.pl b/x2goserver/lib/x2gosqlitewrapper.pl index 70ee4e5..8483f32 100755 --- a/x2goserver/lib/x2gosqlitewrapper.pl +++ b/x2goserver/lib/x2gosqlitewrapper.pl @@ -25,14 +25,14 @@ use strict; use DBI; use POSIX; -# retrieve home dir of x2gouser +# retrieve home dir of x2gouser my $x2gouser='x2gouser'; my ($uname, $pass, $uid, $pgid, $quota, $comment, $gcos, $homedir, $shell, $expire) = getpwnam($x2gouser); my $dbfile="$homedir/x2go_sessions"; # retrieve account data of real user my $realuser=$<; -my ($uname, $pass, $uid, $pgid, $quota, $comment, $gcos, $homedir, $shell, $expire) = getpwnam($realuser); +my ($uname, $pass, $uid, $pgid, $quota, $comment, $gcos, $homedir, $shell, $expire) = getpwuid($realuser); my $dbh=DBI->connect("dbi:SQLite:dbname=$dbfile","","",{AutoCommit => 1}) or die $_; @@ -81,6 +81,7 @@ elsif($cmd eq "listsessionsroot_all") elsif($cmd eq "getmounts") { my $sid=shift or die "argument \"session_id\" missed"; + check_user($sid); my @strings; my $sth=$dbh->prepare("select client, path from mounts where session_id=?"); $sth->execute($sid)or die; @@ -91,6 +92,7 @@ elsif($cmd eq "deletemount") { my $sid=shift or die "argument \"session_id\" missed"; my $path=shift or die "argument \"path\" missed"; + check_user($sid); my $sth=$dbh->prepare("delete from mounts where session_id=? and path=?"); $sth->execute($sid, $path); $sth->finish(); @@ -101,6 +103,7 @@ elsif($cmd eq "insertmount") my $sid=shift or die "argument \"session_id\" missed"; my $path=shift or die "argument \"path\" missed"; my $client=shift or die "argument \"client\" missed"; + check_user($sid); my $sth=$dbh->prepare("insert into mounts (session_id,path,client) values (?, ?, ?)"); $sth->execute($sid, $path, $client); if(!$sth->err()) @@ -115,6 +118,7 @@ elsif($cmd eq "insertsession") my $display=shift or die "argument \"display\" missed"; my $server=shift or die "argument \"server\" missed"; my $sid=shift or die "argument \"session_id\" missed"; + check_user($sid); my $sth=$dbh->prepare("insert into sessions (display,server,uname,session_id, init_time, last_time) values (?, ?, ?, ?, datetime('now','localtime'), datetime('now','localtime'))"); $sth->execute($display, $server, $realuser, $sid) or die $_; @@ -131,6 +135,7 @@ elsif($cmd eq "createsession") my $snd_port=shift or die"argument \"snd_port\" missed"; my $fs_port=shift or die"argument \"fs_port\" missed"; my $sid=shift or die "argument \"session_id\" missed"; + check_user($sid); my $sth=$dbh->prepare("update sessions set status='R',last_time=datetime('now','localtime'),cookie=?,agent_pid=?, client=?,gr_port=?,sound_port=?,fs_port=? where session_id=? and uname=?"); $sth->execute($cookie, $pid, $client, $gr_port, $snd_port, $fs_port, $sid, $realuser)or die; @@ -144,6 +149,7 @@ elsif($cmd eq "insertport") my $sid=shift or die "argument \"session_id\" missed"; my $sshport=shift or die "argument \"port\" missed"; my $sth=$dbh->prepare("insert into used_ports (server,session_id,port) values (?, ?, ?)"); + check_user($sid); $sth->execute($server, $sid, $sshport) or die; $sth->finish(); } @@ -152,6 +158,7 @@ elsif($cmd eq "resume") { my $client=shift or die "argument \"client\" missed"; my $sid=shift or die "argument \"session_id\" missed"; + check_user($sid); my $sth=$dbh->prepare("update sessions set last_time=datetime('now','localtime'),status='R', client=? where session_id = ? and uname=?"); $sth->execute($client, $sid, $realuser) or die; @@ -162,6 +169,7 @@ elsif($cmd eq "changestatus") { my $status=shift or die "argument \"status\" missed"; my $sid=shift or die "argument \"session_id\" missed"; + check_user($sid); my $sth=$dbh->prepare("update sessions set last_time=datetime('now','localtime'), status=? where session_id = ? and uname=?"); $sth->execute($status, $sid, $realuser)or die; @@ -170,7 +178,6 @@ elsif($cmd eq "changestatus") elsif($cmd eq "getdisplays") { - #ignore $server my @strings; my $sth=$dbh->prepare("select display from sessions"); @@ -222,6 +229,7 @@ elsif($cmd eq "getagent") { my $sid=shift or die "argument \"session_id\" missed"; my $agent; + check_user($sid); my $sth=$dbh->prepare("select agent_pid from sessions where session_id=?"); $sth->execute($sid)or die; @@ -239,6 +247,7 @@ elsif($cmd eq "getdisplay") { my $sid=shift or die "argument \"session_id\" missed"; my $display; + check_user($sid); my $sth=$dbh->prepare("select display from sessions where session_id =?"); $sth->execute($sid)or die; @@ -296,6 +305,14 @@ sub checkroot } } +sub check_user +{ + my $sid=shift or die "argument \"session_id\" missed"; + # session id looks like someuser-51-1304005895_stDgnome-session_dp24 + my ( $user, $rest ) = split('-', $sid, 2); + $user eq $uname or die "$uname is not authorized (should be $user)"; +} + sub fetchrow_printall_array { # print all arrays separated by the pipe symbol -- 1.7.4.1

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3.99 Testing - General sluggishness
by John A. Sullivan III 22 Jul '11

22 Jul '11

I suppose I'll cover this one next as John Williams raised one of the issues. This is another Windows only issue. This issue has two categories. It is complicated by the packing problem because we can only run the Windows client now with sub-optimal packing but it was a problem before the corruption issue struck. Screen painting is just slower - not just a little slower - a lot slower. The typical anecdotal test I've been using is scrolling through my Evolution Inbox. Evolution has always seemed to have terrible graphics handling. I don't know what it does but it is always sluggish and awkward - thus an excellent test of how well we handle challenging graphics. Even under Linux on a LAN, scrolling is miserably slow. Shift down arrow and wait 1/4 second for a response. This is really annoying. However, in Windows, it is wait 1/2 to 3/4 seconds for a response. This takes it from annoying to dangerous as users wind up deleting or opening unintended emails, i.e., the hold the shift down arrow until they think they have highlighted the mails they want and then press enter. What they don't realize is that five more emails will be selected because of the delay between what they see and the key buffer. The other problem is a show stopper but I'm not sure it is an X2Go issue. I think this is the same issue John Williams is seeing. We see it only in Windows and Iceweasel. It appears that Iceweasel hangs for quite a long time - not just a few seconds. My guess is 30 seconds to a minute or more. The system is really not hung. All other applications work fine and the screen paints normally. It is just the Iceweasel screen which does not paint. Then, all at once, all the keystrokes and clicks are suddenly executed. It's as if the events are being buffered or stored and not sent. Although we cannot rule it out, we think we have only seen this in a single scenario - when using the Zimbra web client chat feature. All other browsing and multi-tab activity seems to be fine but, as soon as someone sends me a chat message, Iceweasel painting stops . . . some of the time. Other times it works perfectly fine. Once, it gave me a white screen of death. Another time, it completely killed vcxsrv. Most of the time, it causes this event execution delay. I can merrily go and use other applications and all events are processed with no noticeable delay; I just can use Iceweasel. Then, everything catches up, all the events are processed, and all is well with the world once again. Zimbra is a heavy AJAX application. I don't know if the application John Williams is using is also heavily AJAX driven - John

2 5

x2goclient win32 build howto
by Mike Gabriel 22 Jul '11

22 Jul '11

Hi Alex, Heinz, Phil, AFAIK your are the only three people you know how to build x2goclient for Win32. It would be really great to have some build instructions (a cook recipe) in the X2go Wiki. Here is the still empty page for this: http://wiki.x2go.org/build-x2goclient-for-win32 It would be great if any of you could see to this job!!!! THANKS!!! Mike -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 GnuPG Key ID 0xB588399B mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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3.99 Testing - Return from full screen mode not working
by John A. Sullivan III 22 Jul '11

22 Jul '11

This is also a Windows only issue. When in full screen mode there is no way to exit it other than <Alt><Tab>. The standard ways of leaving full screen (magic pixel in top right, Alt-Ctl-F, or Alt-Ctl-M) do not work. Hmm . . . come to think of it, I do not think I tried Alt-Ctl-Enter but I am not in Windows now to test it - John

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3.99 Testing - Return from full screen mode not working
by John A. Sullivan III 22 Jul '11

22 Jul '11

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3.99 Testing - Clean up of old installations
by John A. Sullivan III 22 Jul '11

22 Jul '11

It does not seem that we do a good job of cleaning up after ourselves in Windows after uninstalling. Perhaps this is intentional but I would think we should at least give an option for complete removal. While working on the packing problem, I scoured through file system and registry to ensure I had cleaned everything. The ~/.x2go directory remained in place after uninstalling. We also left the registry entries in place. I also noticed there were Cygwin entries in the registry. I do not know if these were left over from the 3.0.1-4 installation or from Pyhoca. We do not want to delete them if there is an independent Cygwin installation but, if the only one is the one installed by an old x2goclient, I would think we should remove references to it in the registry - John

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3.99 Testing - Task bar icon does not disappear on close
by John A. Sullivan III 22 Jul '11

22 Jul '11

Small item on Windows. After clicking on exit on the x2goclient task bar icon, the icon does not disappear. I need to mouse over the task bar again for it do disappear - John

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3.99 Testing - Alt tab not working as expected in full screen
by John A. Sullivan III 22 Jul '11

22 Jul '11

I would expect that <ALT><TAB> would operate within the X2Go desktop when in full screen mode. Arguably, we might even want it when in Windowed mode or at least as a toggleable option. It is not behaving that way. In some ways, that is fortuitous because of the bug of not being able to leave full screen mode - <ALT><TAB> is the only way I have seen to escape. I know this can work because Phil had it working in our labs although I'm not sure it that was in all modes or only rootless. I do not know if is is simply a command line switch we need to pass to vcxsrv but not having it has an impact on end user productivity. Thanks - John

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3.99 Testing - knotify: no process found
by John A. Sullivan III 22 Jul '11

22 Jul '11

This one is on Linux. If I suspend a session from my Trinity desktop on Squeeze, I get a knotify: no process found error message - John

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