[Pkg-systemd-maintainers] Bug#719444: systemd: incompatibility between systemd 204 and libsystemd-login0 44

[Sven Joachim]

Package: systemd
Version: 204-2
Severity: normal

Since systemd 203, user sessions are placed in cgroups suffixed with
".session" (e.g. my current session is under
/sys/fs/cgroup/systemd/user/1000.user/c1.session).  Unfortunately,
libsystemd-login0 from unstable is not prepared for that, and the
following more or less plausible code breaks with it:

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With libsystemd-login0 44-12, this program prints:

,----
| err=0
| session=c1.session
| sd_session_is_active=-2
| sd_session_get_seat=-2
`----

where -2 indicates ENOENT.  With libsystemd-login0 204-2, the output is
better:

,----
| err=0
| session=c1
| sd_session_is_active=1
| sd_session_get_seat=0
`----

A real-world package where this incompatibility causes problems is
weston: the weston-launch wrapper failed for me until I upgraded
libsystemd-login0 to the version in experimental.


-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (101, 'experimental')
Architecture: i386 (x86_64)

Kernel: Linux 3.11.0-rc4-nouveau (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages systemd depends on:
ii  initscripts          2.88dsf-43
ii  libacl1              2.2.52-1
ii  libaudit0            1:1.7.18-1.1
ii  libc6                2.17-92
ii  libcap2              1:2.22-1.2
ii  libcryptsetup4       2:1.6.1-1
ii  libdbus-1-3          1.6.12-1
ii  libgcrypt11          1.5.3-1
ii  libkmod2             9-3
ii  liblzma5             5.1.1alpha+20120614-2
ii  libpam0g             1.1.3-9
ii  libselinux1          2.1.13-2
ii  libsystemd-daemon0   44-12
ii  libsystemd-journal0  204-2
ii  libudev1             204-2
ii  libwrap0             7.6.q-24
ii  udev                 204-2
ii  util-linux           2.20.1-5.5

Versions of packages systemd recommends:
ii  libpam-systemd  204-2

Versions of packages systemd suggests:
pn  systemd-ui  <none>

-- no debconf information