** Description changed: + [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/subuids + 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
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1475749 Title: usermod --add-subuids fails for users not in /etc/passwd To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1475749/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
