[LightDM] Guest logins and PAM

[Robert Ancell]

Guest logins are done using a newly created user and the autologin stack.


On 22 February 2014 02:21, Veli-Matti Lintu <veli-matti.lintu at opinsys.fi>wrote:

> Hi,
>
> I've been going through lightdm's guest login flow to find a place where I
> could initialise sessions for normal logins and guest sessions the same
> way. This includes creating some directories and files as root and setting
> some env variables. So far I've been using pam_env.so and pam_exec.so to
> call the scripts in various stages of the PAM stack. Some of these are
> called also for ssh logins, so PAM has been a natural place for these.
>
> lightdm uses a separate PAM stacks for normal and autologins, but it seems
> to bypass PAM completely for guest logins. What is the background for this?
> Would it be possible to add PAM support for guest logins? I'm not yet
> familiar enough with the code to say this myself. I'm about to start
> digging into the code better, but having some pointers would be really nice.
>
> Thanks,
>
> Veli-Matti
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