Re: [gdm-list] Internet cafe application

[Guillaume Viguier-Just <gviguier cs umass edu>]

Thanks a lot for your answer, it helps me a lot !

Does anyone know at which piece of code I would need to look at to do
the modifications I want to do (in other words, which files control
the display of the greeter ?)

Guillaume.

2009/7/27 Ray Strode <halfline gmail com>:
> Hi,
>
>
>> I'm in the process of writing an Internet cafe application for Linux
>> and I'd like to, eventually, have on the GDM login screen 3 text
>> boxes:
>>  - one for a user login with a timecode (basically the idea would be
>> that the customer would purchase a timecode which would allow him to
>> login for a specific amount of time, and he would enter this timecode
>> in the GDM login screen, which would start a default session)
>>  - 2 other text boxes for the usual username/password combination,
>> which would allow members of the Internet cafe to login into a
>> "normal" unix account
>> (Note: another way to do this would be to have the timecode login
>> screen enabled by default and have a button "I'm a member" that would
>> redirect to another window which would show the usual
>> username/password combination)
>>
>> As for the authentication and session opening, I'm pretty sure what I
>> need to do is to write PAM module(s) that will do the work needed.
> That's right.  PAM modules can be stacked, so the easiest way to
> implement what you want is a PAM module that asks:
>
> "Please enter your time code or member user name:"
>
> And if what the user types starts with a number assume it's a timecode
> and process it, otherwise set
> the PAM_USER item and return early from your pam module so the next
> module in the stack can use it (pam_unix).
>
>> As for the login screen modification, I've looked at the GDM and
>> simple-greeter code, including GDM login themes, and did not see any
>> fairly easy way to do this. So, how should I go about this ? Is there
>> a way to write some kind of plugin to GDM ? Do I need to get into the
>> code and recompile my own version of GDM ?
> I've started on a plugin system here:
>
> http://git.gnome.org/cgit/gdm/log/?h=multi-stack
>
> It's not finished yet, though, and it doesn't support out of tree
> plugins, so either way you'd need to recompile your own version of
> GDM.
>
> --Ray
>



-- 
Guillaume Viguier-Just