Goal:
-----
When using gnome-screensaver I would like a simple unlock dialog that
prompts for both user name and password. It should not show the current
user name. If the (user,password) pair authenticates, the current user
desktop is unlocked and the applications are again visible. The unlock
(user,password) pair need not be the owner of the desktop.
Background:
-----------
I am creating an information kiosk.
On power-up it does an auto-login and locks the screen with
gnome-screensaver-command. Finally it auto-starts a number of graphical
system status applications.
There exists a set of (user,password) pairs that should be able to
unlock the screen and see the currently running applications.
After one user authenticates with their (user,password) pair, the user
locks the screen with either the menu lock option or the screen will
eventually lock due to a screensaver timeout.
Another user can then walk up to the kiosk, unlock the screen with their
specific (user,password) pair, check the system status, and then leave.
This should be logged so I know which user is looking at the system
status apps at any given time.
The process continues with other (user,password) pairs as necessary.
We don't want the users to have a single (user,password) pair.
Current Status :
----------------
It looks like Fedora 7 will be the basic platform. I am using FC6 for now.
Auto-login, starting the apps, locking and unlocking the screen with the
auto-start system (user,password) are all working.
However the dialog that pops up to unlock the screen shows the
auto-login user name and prompts for a password.
So far I have tried adding "user1" and "user2" using the -o option to
useradd (giving them the same UID/GID as the auto-start account) and
then setting "user_switch_enabled" for gnome-screensaver.
Unfortunately this is not enough:
1) Actually switching users only shows "other UID" users in the
selection list, not the "sibling UID users".
2) Switching to a "other UID" user creates a new Desktop for the other
UID, which is as expected, but not desired. Useful for testing though.
3) Switching users again from an "other UID" shows all the "sibling UID"
accounts in the list. Selecting one of the "sibling UID" users (but not
the auto-login user) gets to the auto-login desktop configuration, but
without the auto-started applications visible.
It appears I will have to modify the gnome-screensaver-dialog and
possibly pam to get this to work.
I have looked at the g-s src rpm plugin code and have considered a few
mods but haven't tried anything yet.
Before continuing I thought I would ask here for advice, comments or
suggestions.
Thanks,
John
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