<varlistentry>
<term><varname>MESSAGE=</varname></term>
<listitem>
- <para>The human readable
+ <para>The human-readable
message string for this
entry. This is supposed to be
the primary text shown to the
<varlistentry>
<term><varname>MESSAGE_ID=</varname></term>
<listitem>
- <para>A 128bit message
+ <para>A 128-bit message
identifier ID for recognizing
certain message types, if this
is desirable. This should
- contain a 128bit id formatted
- as lower-case hexadecimal
+ contain a 128-bit ID formatted
+ as a lower-case hexadecimal
string, without any separating
dashes or suchlike. This is
- recommended to be a UUID
- compatible ID, but this is not
+ recommended to be a
+ UUID-compatible ID, but this is not
enforced, and formatted
differently. Developers can
generate a new ID for this
- purpose with
- <command>journalctl
- --new-id</command>.</para>
+ purpose with <command>journalctl
+ <option>--new-id</option></command>.
+ </para>
</listitem>
</varlistentry>
0 (<literal>emerg</literal>)
and 7
(<literal>debug</literal>)
- formatted as decimal
+ formatted as a decimal
string. This field is
compatible with syslog's
priority concept.</para>
<para>The code location
generating this message, if
known. Contains the source
- file name, the line number and
+ filename, the line number and
the function name.</para>
</listitem>
</varlistentry>
any. Contains the numeric
value of
<citerefentry><refentrytitle>errno</refentrytitle><manvolnum>3</manvolnum></citerefentry>
- formatted as decimal
+ formatted as a decimal
string.</para>
</listitem>
</varlistentry>
<para>The process, user and
group ID of the process the
journal entry originates from
- formatted as decimal
+ formatted as a decimal
string.</para>
</listitem>
</varlistentry>
any is known that is different
from the reception time of the
journal. This is the time in
- usec since the epoch UTC
- formatted as decimal
+ microseconds since the epoch UTC,
+ formatted as a decimal
string.</para>
</listitem>
</varlistentry>
<para>The kernel boot ID for
the boot the message was
generated in, formatted as
- 128bit hexadecimal
+ a 128-bit hexadecimal
string.</para>
</listitem>
</varlistentry>
<listitem>
<para>How the entry was
received by the journal
- service. One of
- <literal>driver</literal>,
- <literal>syslog</literal>,
- <literal>journal</literal>,
- <literal>stdout</literal>,
- <literal>kernel</literal> for
- internally generated messages,
- for those received via the
- local syslog socket with the
- syslog protocol, for those
- received via the native
- journal protocol, for the
- those read from a services'
- standard output or error
- output, or for those read
- from the kernel, respectively.
+ service. Valid transports are:
</para>
+ <variablelist>
+ <varlistentry>
+ <term>
+ <option>driver</option>
+ </term>
+ <listitem>
+ <para>for
+ internally
+ generated
+ messages
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>syslog</option>
+ </term>
+ <listitem>
+ <para>for those
+ received via the
+ local syslog
+ socket with the
+ syslog protocol
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>journal</option>
+ </term>
+ <listitem>
+ <para>for those
+ received via the
+ native journal
+ protocol
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>stdout</option>
+ </term>
+ <listitem>
+ <para>for those
+ read from a
+ service's
+ standard output
+ or error output
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>kernel</option>
+ </term>
+ <listitem>
+ <para>for those
+ read from the
+ kernel
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
</listitem>
</varlistentry>
</variablelist>
messages originating in the kernel and stored in the
journal.</para>
- <variablelist>
+ <variablelist class='journal-directives'>
<varlistentry>
- <term>_KERNEL_DEVICE=</term>
+ <term><varname>_KERNEL_DEVICE=</varname></term>
<listitem>
<para>The kernel device
name. If the entry is
associated to a block device,
the major and minor of the
- device node, separated by ':'
- and prefixed by 'b'. Similar
+ device node, separated by <literal>:</literal>
+ and prefixed by <literal>b</literal>. Similar
for character devices, but
- prefixed by 'c'. For network
+ prefixed by <literal>c</literal>. For network
devices the interface index,
- prefixed by 'n'. For all other
- devices '+' followed by the
+ prefixed by <literal>n</literal>. For all other
+ devices <literal>+</literal> followed by the
subsystem name, followed by
- ':', followed by the kernel
+ <literal>:</literal>, followed by the kernel
device name.</para>
</listitem>
</varlistentry>
<varlistentry>
- <term>_KERNEL_SUBSYSTEM=</term>
+ <term><varname>_KERNEL_SUBSYSTEM=</varname></term>
<listitem>
<para>The kernel subsystem name.</para>
</listitem>
</varlistentry>
<varlistentry>
- <term>_UDEV_SYSNAME=</term>
+ <term><varname>_UDEV_SYSNAME=</varname></term>
<listitem>
<para>The kernel device name
as it shows up in the device
</listitem>
</varlistentry>
<varlistentry>
- <term>_UDEV_DEVNODE=</term>
+ <term><varname>_UDEV_DEVNODE=</varname></term>
<listitem>
<para>The device node path of
this device in
</listitem>
</varlistentry>
<varlistentry>
- <term>_UDEV_DEVLINK=</term>
+ <term><varname>_UDEV_DEVLINK=</varname></term>
<listitem>
<para>Additional symlink names
pointing to the device node in
</variablelist>
</refsect1>
+ <refsect1>
+ <title>Special Journal Fields</title>
+
+ <para>Fields used by the <command>systemd-coredump</command>
+ coredump kernel helper.
+ </para>
+
+ <variablelist class='journal-directives'>
+ <varlistentry>
+ <term><varname>COREDUMP_UNIT=</varname></term>
+ <term><varname>COREDUMP_USER_UNIT=</varname></term>
+ <listitem>
+ <para>Used to annotate
+ messages containing coredumps from
+ system and session units.
+ See
+ <citerefentry><refentrytitle>systemd-coredumpctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
<refsect1>
<title>Address Fields</title>
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
+ stored in the journal but for 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
describes the position of an
entry in the journal and is
portable across machines,
- platforms and journal
- files.</para>
+ platforms and journal files.
+ </para>
</listitem>
</varlistentry>
<term><varname>__REALTIME_TIMESTAMP=</varname></term>
<listitem>
<para>The wallclock time
- (CLOCK_REALTIME) at the point
- in time the entry was received
- by the journal, in usec since
- the epoch UTC formatted as
- decimal string. This has
- different properties from
- <literal>_SOURCE_REALTIME_TIMESTAMP=</literal>
+ (<constant>CLOCK_REALTIME</constant>)
+ at the point in time the entry
+ was received by the journal,
+ in microseconds since the epoch
+ UTC, formatted as a decimal
+ string. This has different
+ properties from
+ <literal>_SOURCE_REALTIME_TIMESTAMP=</literal>,
as it is usually a bit later
- but more likely to be
- monotonic.</para>
+ but more likely to be monotonic.
+ </para>
</listitem>
</varlistentry>
<term><varname>__MONOTONIC_TIMESTAMP=</varname></term>
<listitem>
<para>The monotonic time
- (CLOCK_MONOTONIC) at the point
- in time the entry was received
- by the journal in usec
- formatted as decimal
+ (<constant>CLOCK_MONOTONIC</constant>)
+ at the point in time the entry
+ was received by the journal in
+ microseconds, formatted as a decimal
string. To be useful as an
- address for the entry this
- should be combined with with
- boot ID in
- <literal>_BOOT_ID=</literal>.</para>
+ address for the entry, this
+ should be combined with with the
+ boot ID in <literal>_BOOT_ID=</literal>.
+ </para>
</listitem>
</varlistentry>
</variablelist>
<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>systemd-coredumpctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
</para>
</refsect1>
~ianmdlvl / elogind.git / blobdiff