On 08/12/2014 03:08 PM, Stéphane Desneux wrote:
Hi Valentina,
Hi Stephane,
As Casey and Carsten said: things are not black and white... but simply gray :) We *try* to reduce the daemons running as root as much as possible. But it's not an absolute rule. Sometimes, it's possible to migrate a daemon from root to <some system user> without much difficulties. A good example is weston in Tizen:Common: it runs as a 'display' user, who has the proper rights on the DRM and input devices. For some other daemons, it can become more tricky. If I take a quick look on a recent Tizen:Common snapshot, I can see that there are some daemons running as root, as you noticed: root 159 1 0 03:22 ? 00:00:00 /usr/sbin/ofonod -n root 161 1 0 03:22 ? 00:00:00 /usr/bin/alarm-server root 168 1 0 03:22 ? 00:00:00 /usr/sbin/connmand -n root 172 1 0 03:22 ? 00:00:00 /usr/bin/security-server root 173 1 0 03:22 ? 00:00:00 /usr/bin/media-server root 175 1 0 03:22 ? 00:00:00 /usr/bin/notification-service root 239 1 0 03:22 ? 00:00:00 /lib/bluetooth/bluetoothd -E root 344 1 0 03:22 ? 00:00:00 /usr/sbin/wpa_supplicant -u root 1037 173 0 03:23 ? 00:00:00 media-thumbnail-server In this list, I see 3 categories: - some daemons can very probably run as system users (media-server, media-thumbnail-server, ofonod, alarm-server), if we're able to define the appropriate rights - for network and connectivity daemons (connmand, wpa_supplicant, bluetoothd), it may be more tricky to migrate to non-root users, but this needs some investigation - some services need to run as root (security-server AFAIK) As Casey pointed, migrating from root to system users for some daemons is an ongoing effort.
thanks for your detailed answer. I was actually wondering how you proceeded with the identification of the processes that can be run as system processes and if you planned to continue in that direction for the services that still run as root. My guess is that this would help also with having a multi-user/multi-session system.
Best Regards, - Valentina
Best regards,
_______________________________________________ Dev mailing list [email protected] https://lists.tizen.org/listinfo/dev
