[Dev] Tizen 3.0 Multiuser support architecture proposition

Dominig ar Foll (Intel OTC) dominig.arfoll at fridu.net
Mon Oct 28 09:36:16 GMT 2013

Le 26/10/2013 07:34, 김정훈 a écrit :
> Hi Dominig,
> I attached the material instead of Young.
> Regards,
> David.
> ------- Original Message -------
> Sender : YOUNG IK CHO<youngik.cho at samsung.com> S5/Senior Engineer/Service Platform Group/Samsung Electronics
> Date : 2013-10-25 20:52 (GMT+09:00)
> Title : Re: Multi user details questions.
> Actually there is a minor issue for $HOME directory. On the *NIX world, the actual user directory is /home/{username}. However, I proposed /opt/usr/uid instead of /opt/usr/username. There is subtle issue of assigning username in the literal form and I think using uid instead of username is fine. The file standard hierarchy does not specify the user directory name in detail and we just need to maintain symbolic link of /home correctly.
I do not think that deriving from the reliable and well accepted method 
of using the $HOME is the good idea.
Getting the $HOME from the environment is easy and reliable. It has 
proven its value over the years.

For me, using uid in a file path which is in a non standard location in 
the Tizen base platform should be avoided for two reasons :

  1) it creates a new hardwired link between the login and the uid that 
we might regret if we have to enforce Application isolation in a later 
version of Tizen (4.0 ?) by the use of container.
  2) it requires two rw mounting points on the any Tizen compliant 
platforms. That add complexity to the Flash organisation (in particular 
on device with only one small Flash) without adding any extra value.

I would propose that for the base Tizen, we stick to the use of $HOME in 
the compliance. Up to a platform manufacturer to create link (e.g. with 
mount -bind) to other locations to provide backward compatibility if needed.


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