<term><varname>_SYSTEMD_CGROUP=</varname></term>
<term><varname>_SYSTEMD_SESSION=</varname></term>
<term><varname>_SYSTEMD_UNIT=</varname></term>
+ <term><varname>_SYSTEMD_USER_UNIT=</varname></term>
<term><varname>_SYSTEMD_OWNER_UID=</varname></term>
<listitem>
- <para>The contol group path in
+ <para>The control group path in
the systemd hierarchy, the
systemd session ID (if any),
- the systemd unit name (if any)
+ the systemd unit name (if any),
+ the systemd user session unit name (if any)
and the owner UID of the
systemd session (if any) of
the process the journal entry
journal protocol, for the
those read from a services'
standard output or error
- output, and for those read
- from the kernel, resp.
+ output, or for those read
+ from the kernel, respectively.
</para>
</listitem>
</varlistentry>
<refsect1>
<title>Address Fields</title>
- <para>During serialization into external formats the
- addresses of journal entries are serialized into
- fields prefixed with double underscores. Note that
- these aren't proper fields when stored in the journal,
- but addressing meta data of entries. They cannot be
- written as part of structured log entries via calls
- such as
+ <para>During serialization into external formats, such
+ as the <ulink
+ url="http://www.freedesktop.org/wiki/Software/systemd/export">Journal
+ Export Format</ulink> or the <ulink
+ url="http://www.freedesktop.org/wiki/Software/systemd/json">Journal
+ JSON Format</ulink>, the addresses of journal entries
+ are serialized into fields prefixed with double
+ underscores. Note that these aren't proper fields when
+ stored in the journal, but addressing meta data of
+ entries. They cannot be written as part of structured
+ log entries via calls such as
<citerefentry><refentrytitle>sd_journal_send</refentrytitle><manvolnum>3</manvolnum></citerefentry>. They
may also not be used as matches for
<citerefentry><refentrytitle>sd_journal_add_match</refentrytitle><manvolnum>3</manvolnum></citerefentry></para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>journald.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ <citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
</para>
</refsect1>