X2Go Bug report logs - #1134
No environment variable available for testing in .bash_profile or .bashrc

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Package: nxagent; Maintainer for nxagent is X2Go Developers <x2go-dev@lists.x2go.org>; Source for nxagent is src:nx-libs.

Reported by: Ted Toal <twtoal@ucdavis.edu>

Date: Tue, 10 Jan 2017 21:20:03 UTC

Severity: normal

Found in version 3.5.0

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Subject: Bug#1134: [X2Go-Dev] Bug#1134: Bug#1134: Bug#1134: No environment variable available for testing in .bash_profile or .bashrc
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From: Ted Toal <twtoal@ucdavis.edu>
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Cc: Rick Benkstein <rbenkstein@cendatsys.com>
To: Stefan Baur <X2Go-ML-1@baur-itcs.de>,
 1134@bugs.x2go.org
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[Message part 1 (text/plain, inline)]
I’m running in windowed mode (XFCE) through x2go and XQuartz.  The DISPLAY environment variable is not set. 

—
Ted Toal, Postdoctoral Researcher
Carvajal-Carmona Lab
4502 GBSF, One Shields Ave
Davis, CA  956626  (530) 263-5986
twtoal@ucdavis.edu




> On Jan 10, 2017, at 2:28 PM, Stefan Baur <X2Go-ML-1@baur-itcs.de> wrote:
> 
> Am 10.01.2017 um 23:12 schrieb Rick Benkstein:
> 
>> I have made my software switchable between GUI non-GUI by examining the DISPLAY variable - if it is NULL then x2go is not being used.
> 
> Unless, of course, you are occasionally using a local X session, or
> regular X forwarding, where this approach will bite you in the
> posterior, falsely assuming that you're running an X2Go session when
> it's regular X.
> 
> The deeper-rooted issue here is that X2Go-specific variables are only
> set when a session is run in fullscreen or windowed mode, displaying an
> entire desktop.
> 
> For single/published applications, no such X2Go-specific variable is set.
> 
> However, you can check if:
> 
> the command x2golistsessions is executable (=we're on an X2GoServer -
> important in case of NFS-mounted home directories)
> 
> AND the DISPLAY variable is set
> 
> AND client DISPLAY and SSH client IP match an X2Go session marked as "R"
> for running.
> 
> See <http://wiki.x2go.org/doku.php/doc:howto:ssh-agent-workaround>,
> section "# Part that runs in X2Go session", for an example where you
> could lift the required code.
> 
> What you don't need is the part that checks for a file named
> "~/.x2go/agent", so just remove that part.
> 
> Kind Regards,
> Stefan
> 
> -- 
> 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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