This bug was fixed in the package shadow - 1:4.5-1.1ubuntu4
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shadow (1:4.5-1.1ubuntu4) eoan; urgency=medium
* debian/patches/1015_add_zsys_support.patch:
- Call zsys to handle home directory if available.
We call zsys to handle dataset creation for zsys system in a separate
home dataset for each user on the system.
This allows one to handle user dataset outside of /home and also renaming.
We don't support yet deletion, as removing the dataset would remove as
well every snapshot of the history, and so, revert to previous version
will result in user created, but no home directory, which is unwanted.
(LP: #1842902)
-- Didier Roche <[email protected]> Thu, 29 Aug 2019 15:00:07 +0200
** Changed in: shadow (Ubuntu)
Status: Triaged => Fix Released
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https://bugs.launchpad.net/bugs/1842902
Title:
FFe: create zfs dataset for each user automatically
Status in shadow package in Ubuntu:
Fix Released
Status in zsys package in Ubuntu:
Fix Released
Bug description:
Part of the zsys spec is creating/associating one user dataset for
each HOME user.
As zsys is an official experimentation for 19.10, we would like to
include this feature in a safe way, and reachable for any tool
creating users (adduser, gnome-control-center, ubiquity…). Those are
using useradd under the scene.
For this, the proposed implementation:
- patch useradd trying to execute "zsys useradd create USER HOMEDIR". If zsys
isn't present or zsys returns a status code != 0 (which will be the case if the
running system isn't a zsys one: pure zfs or non zfs like / on ext4), it will
fallback to mkdir. Then the code does the usual chmod()
- patch usermod, trying as well to execute "zsys useradd rename-home OLDHOME
NEWHOME". Same failing reason (not a zsys system, not installed, OLDHOME isn't
a zsys handled datasets) and fallback to rename(). Then the code does the usual
chmod().
Tested with and without zsys installed, the code does what we expect.
I'm attaching the shadow (useradd/usermod) patches, as you can see it's very
minimal.
A new ZSYS release will be needed (https://github.com/ubuntu/zsys). As you
can see, there are quite some commits since the last release, but it's all
baked (as usual) by a huge suite of tests (in ZFS and machine layers) with
corner cases tested and such. I'm confident on that change.
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