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[Launchpad Bug Tracker <1748147@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package systemd - 237-3ubuntu10.2

---------------
systemd (237-3ubuntu10.2) bionic; urgency=medium

  * logind: backport v238/v239 fixes for handling DRM devices.
    These changes introduce all the fixes that correct handling of open fd's
    related to the DRM devices, as used by for example NVIDIA GPUs. This backport
    includes some refactoring, corrections, and comment updates. This to insure
    that correct history is preserved, code comments match reality, and to ease
    backporting logind fixes in the future SRUs. (LP: #1777099)
  * Disable dh_installinit generation of tmpfiles for the systemd package.
    Replace with a manual safe call to systemd-tmpfiles which will process any
    updates to the tmpfiles shipped by systemd package, taking into account any
    overrides shipped by other packages, sysadmin, or specified in the runtime
    directories. (LP: #1748147)

systemd (237-3ubuntu10.1) bionic; urgency=medium

  [ Dimitri John Ledkov ]
  * hwdb: Fix wlan/rfkill keycode on Dell systems. (LP: #1762385)
  * Cherrypick upstream fix for corrected detection of Virtualbox & Xen.
    (LP: #1768104)
  * Further improve captive portal workarounds.
    Retry any NXDOMAIN results with lower feature levels, instead of just those
    with 'secure' in the domain name. (LP: #1766969)

  [ Michael Biebl ]
  * Add dependencies of libsystemd-shared to Pre-Depends.
    This is necessary so systemctl is functional at all times during a
    dist-upgrade. (Closes: #897986) (LP: #1771791)

  [ Mario Limonciello ]
  * Fix hibernate disk offsets.
    Configure resume offset via sysfs, to enable resume from a swapfile.
    (LP: #1760106)

 -- Dimitri John Ledkov 🌈 <xnox@xxxxxxxxxx>  Fri, 22 Jun 2018 13:55:09
+0100

** Changed in: systemd (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1748147

Title:
  [SRU] debhelper support override from /etc/tmpfiles.d for systemd

Status in debhelper:
  Fix Released
Status in debhelper package in Ubuntu:
  Fix Released
Status in rsyslog package in Ubuntu:
  Invalid
Status in systemd package in Ubuntu:
  Fix Committed
Status in debhelper source package in Xenial:
  Won't Fix
Status in rsyslog source package in Xenial:
  Invalid
Status in systemd source package in Xenial:
  Confirmed
Status in debhelper source package in Artful:
  Won't Fix
Status in rsyslog source package in Artful:
  Invalid
Status in systemd source package in Artful:
  Confirmed
Status in debhelper source package in Bionic:
  Won't Fix
Status in rsyslog source package in Bionic:
  Invalid
Status in systemd source package in Bionic:
  Fix Released

Bug description:
  [Impact]

  /var/log's Permission is going back to 755
  after upgrading systemd
  if there are rsyslog's configuration on /var/lib/tmpfiles.d/

  Affected X, A, B, C

  This is because rsyslog's pkg has 00rsyslog.conf and copied it on /var/lib/tmpfiles.d/ when it is installing.
  after upgrading systemd, systemd only refresh it's own tmpfiles so disappear conf for 00rsyslog.conf ( it doesn't remove file itself )
  so, systemd-tmpfiles --create /var/lib/tmpfiles.d/00rsyslog.conf back permission to 775

  [Test Case]

  1. deploy 16.04 vm
  2. check ll /var (775)
  3. apt install --reinstall systemd
  4. check ll /var (755)

  [Regression Potential]
  This fix changes debhelper's override process by using absolute path to filename. so if the other pkgs using debhelper e.g systemd are there, It should be re-build with new debhelper after patching in theory, now only systemd is affected. but building is not affected. also, pkg like rsyslog which is using systemd's tmpfile system need to be changed to use /etc/tmpfiles.d/[SAME_FILENAME_IN_VAR_LIB_TMPFILES.D_FOR_OVERRIDING] instead of 00rsyslog.conf.

  [Others]

  For this issue, need to fix below pkgs

  debhelper
  systemd ( rebuilding with new debhelper is needed )
  rsyslog ( 00rsyslog.conf to var.conf and location should be /etc/tmpfiles.d, to support override supported by debhelper )

  [Original description]

  Upgrading or reinstalling the systemd package when using rsyslogd
  results in bad permissions (0755 instead of 0775) being set on
  /var/log/. As a consequence of this, rsyslogd can no longer create new
  files within this directory, resulting in lost log messages.

  The default configuration of rsyslogd provided by Ubuntu runs the
  daemon as syslog:syslog and sets ownership of /var/log to syslog:adm
  with mode 0775.

  Systemd's default tmpfiles configuration sets /var/log to 0755 in
  /usr/lib/tmpfiles.d/var.conf, however this is overridden in
  /usr/lib/tmpfiles.d/00rsyslog.conf which is provided by package
  rsyslog.

  It looks as though an upgrade of the systemd package fails to take
  /usr/lib/tmpfiles.d/00rsyslog.conf into account, as demonstrated
  below. This results in /var/log receiving mode 0755 instead of the
  expected 0775:

  nick @ log2.be1.ams1:~ $ lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu 16.04.3 LTS
  Release:	16.04
  Codename:	xenial

  nick @ log2.be1.ams1:~ $ apt policy systemd
  systemd:
    Installed: 229-4ubuntu21.1
    Candidate: 229-4ubuntu21.1
    Version table:
   *** 229-4ubuntu21.1 500
          500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
          500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
          100 /var/lib/dpkg/status
       229-4ubuntu4 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages

  nick @ log2.be1.ams1:~ $ apt policy rsyslog
  rsyslog:
    Installed: 8.16.0-1ubuntu3
    Candidate: 8.16.0-1ubuntu3
    Version table:
   *** 8.16.0-1ubuntu3 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

  nick @ log2.be1.ams1:~ $ grep -F /var/log /usr/lib/tmpfiles.d/var.conf
  d /var/log 0755 - - -
  f /var/log/wtmp 0664 root utmp -
  f /var/log/btmp 0600 root utmp -

  nick @ log2.be1.ams1:~ $ cat /usr/lib/tmpfiles.d/00rsyslog.conf
  # Override systemd's default tmpfiles.d/var.conf to make /var/log writable by
  # the syslog group, so that rsyslog can run as user.
  # See tmpfiles.d(5) for details.

  # Type Path    Mode UID  GID  Age Argument
  d /var/log 0775 root syslog -

  nick @ log2.be1.ams1:~ $ ls -ld /var/log
  drwxrwxr-x 8 root syslog 4096 Feb  7 13:45 /var/log

  nick @ log2.be1.ams1:~ $ sudo apt install --reinstall systemd
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 7 not upgraded.
  Need to get 3,634 kB of archives.
  After this operation, 0 B of additional disk space will be used.
  Get:1 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 systemd amd64 229-4ubuntu21.1 [3,634 kB]
  Fetched 3,634 kB in 0s (24.3 MB/s)
  (Reading database ... 86614 files and directories currently installed.)
  Preparing to unpack .../systemd_229-4ubuntu21.1_amd64.deb ...
  Unpacking systemd (229-4ubuntu21.1) over (229-4ubuntu21.1) ...
  Processing triggers for dbus (1.10.6-1ubuntu3.3) ...
  Processing triggers for ureadahead (0.100.0-19) ...
  Processing triggers for man-db (2.7.5-1) ...
  Setting up systemd (229-4ubuntu21.1) ...
  addgroup: The group `systemd-journal' already exists as a system group. Exiting.

  nick @ log2.be1.ams1:~ $ ls -ld /var/log
  drwxr-xr-x 8 root syslog 4096 Feb  7 13:45 /var/log

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