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-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to shadow in Ubuntu. https://bugs.launchpad.net/bugs/1475749 Title: usermod --add-subuids fails for users not in /etc/passwd Status in Canonical System Image: Fix Released Status in shadow package in Ubuntu: Fix Released Status in shadow source package in Vivid: Fix Released Bug description: [SRU justification] The (distro patched) subuid/subgid support in the shadow 'usermod' command only works with users present in /etc/passwd. As /etc/subuid and /etc/subgid are separate databases that do not require modification of /etc/passwd, this is an unnecessary restriction that appears to be due to a simple logic bug in the patch and not as a deliberate design decision. As Ubuntu Touch and Ubuntu Snappy systems will as a class have users in different NSS backends from /etc/passwd, and lxc should be supported for these users with uid namespacing, this bug warrants fixing. [Test case] 1. Install the libnss-extrausers package 2. Enable it by running "sudo sed -i -e'/passwd:/ s/$/ extrausers/' /etc/nsswitch.conf" 3. Create a test user by running "echo 'testuser:x:2000:2000::/nonexistent:/bin/false' | sudo tee /var/lib/extrausers/passwd" 4. Attempt to add subuids for this user by running "sudo usermod --add-subuids 10000-12000 testuser" 5. Confirm that this fails with the error message "usermod: user 'testuser' does not exist in /etc/passwd" 6. Install the new version of the 'passwd' package 7. Repeat the test from step 4 8. Confirm that the command now succeeds, and the user's entry has been added to /etc/subuid 9. Clean up by running 'sudo usermod --del-subuids 10000-12000 testuser" and removing the /var/lib/extrausers/passwd file [Regression potential] This is a targeted bugfix in the behavior of usermod, and users are unlikely to be relying on the usermod command failing for non-local users. [Original report] currently we have need to utilize lxc on vivid+stable overlay which requires adding subuser & subgroup ids. unfortunately, usermod currently fails since phablet password is readonly To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1475749/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
