[systemd-devel] [Patch 0/5] support for logging the unit of user session units

[Mirco Tischler]

Hi

The following series of patches implements support for logging user
session units to the journal. Messages by the unit itself are marked with
_SYSTEMD_USER_UNIT and messages regarding the unit from the systemd
instance are marked with USER_UNIT.

Patch 1: log _SYSTEMD_USER_UNIT into the journal
Patch 2: log USER_UNIT from systemd core and use it.
Patch 3+4: use _SYSTEMD_USER_UNIT and USER_UNIT in systemctl --user status
Patch 5: update the man page

However, something isn't working quite right. The output of
systemctl --user status sometimes shows entries that belong to different
units and it doesn't always show the configured number of entries, even
if there are enough available. I suspect a bug in the seek and match code
that's triggered by Patches 3+4. But I don't have a very good understanding
of the lower level journal code so even though I tried I couldn't locate the
bug :/ Of cause the possibility remains that the patches are simply faulty,
so please take a look ;)

Here are some todos I didn't get to yet:

- support for coredumps (COREDUMP_USER_UNIT)
- (maybe) only open logfiles of one user (SD_JOURNAL_USER_ONLY)

Thanks

Mirco