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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Message #15 received at 1134@bugs.x2go.org (full text, mbox, reply):

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Subject: Re: [X2Go-Dev] Bug#1134: Bug#1134: No environment variable available
 for testing in .bash_profile or .bashrc
To: Rick Benkstein <rbenkstein@cendatsys.com>, 1134@bugs.x2go.org
References: <9E59DC33-FF80-4D84-BA9F-96BCFDA8B8CE@ucdavis.edu>
 <1fe5ef7f8e274faf9c51e7e06369ea01@CDS-EXCHG2.cds.local>
From: Stefan Baur <X2Go-ML-1@baur-itcs.de>
Message-ID: <047392b2-73a1-b2c6-9ad5-512b1cc06696@baur-itcs.de>
Date: Tue, 10 Jan 2017 23:28:31 +0100
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[Message part 1 (text/plain, inline)]
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

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