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Month: February 2014

Re: [trinity-devel] TDE running on systemd will require code changes proper session tracking?

From: "David C. Rankin" <drankinatty@...>
Date: Mon, 03 Feb 2014 17:37:04 -0600
On 02/03/2014 04:41 PM, Slávek Banko wrote:
> On Monday 03 of February 2014 23:32:02 David C. Rankin wrote:
>> On 02/03/2014 04:15 PM, Slávek Banko wrote:
>>> Now I read it again and if I understand it correctly, is that about
>>> correct setting PAM => no need to change the source code of TDM?
>> Yes -- there may be minor changes, but I believe the key is #3 and making
>> sure the pam stack has the needed information including pam_systemd. The
>> coding should be negligible. We just have to figure out how to tell if the
>> pam stack is set properly in TDE/TDM. How in the heck do you do that?
>> The environment settings are what was suggested in #2 and #4 on the
>> page.
> Aha, so #1 is a little different :)
> For #1: WITH_CONSOLE_KIT is defined in dm.h => is always set. However, if 
> ConsoleKit is not available on your system, it should not be a problem. 
> Session will not be registered under the ConsoleKit and XDG_SESSION_COOKIE 
> will not be set => no need to change source code TDM.
> If I understand correctly, #2 can be set in PAM configuration => no need to 
> change source code TDM. And #4 is optional => no need to change source code 
> TDM.
> Slavek

I see what you are saying, but I'm a bit concerned that all the preprocessor
directives may be causing problems.

For example, since WITH_CONSOLE_KIT is aways set, then what if
(ck_session_cookie != NULL), then the XDG_SESSION_COOKIE is still set. Won't
that screw up the pure systemd session tracking?

For #2 how in the heck to we set that? I don't see any options to register the
greeter session via the PAM session stack or how to make sure the PAM session
modules include pam_systemd?? It seems simple, but how/where are these things
set? Are these additional pam_misc_setenv() or pam_setenv() calls that are
needed are is there another way to set these? What does it mean "make sure the
PAM session modules include pam_systemd"?

#3 is a reminder to make sure we did #2 correctly.... and then to do it AGAIN
for the "logged in user". What?

#4 that is optional, but I don't see the harm in adding the pam_misc_setenv()
calls to make sure pam has "seat0" and vt"7" -- or at least we need a way to
confirm that it does. The running process information show vt7 is set correctly,
but what is "seat0" and how to check?

 \_ /usr/bin/X -br -nolisten tcp :0 vt7 -auth /var/run/xauth/A:0-LI4Qla
 \_ -:0
     \_ /bin/sh /opt/trinity/bin/starttde
         \_ /opt/trinity/bin/tdeinit_phase1
             \_ kwrapper ksmserver --windowmanager twin

I need more aspirin...

David C. Rankin, J.D.,P.E.