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Information which unit a log entry pertains to enables systemctl
status to display more log messages.
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Example:
journalctl -F _SYSTEMD_UNIT
will list all units that ever logged to the journal.
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entries of the journal
The new 'unique' API allows listing all unique field values that a field
specified by a field name can take in all entries of the journal. This
allows answering queries such as "What units logged to the journal?",
"What hosts have logged into the journal?", "Which boot IDs have logged
into the journal?".
Ultimately this allows implementation of tools similar to lastlog based
on journal data.
Note that listing these field values will not work for journal files
created with older journald, as the field values are not indexed in
older files.
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PID of systemd
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Quite long to read but hopefully less misleading.
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Much like logind has a client in loginctl, and journald in journalctl
introduce timedatectl, to change the system time (incl. RTC), timezones
and related settings.
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If a device unit has aliases defined in udev rules, and there are
other units that depend on that alias, as in
BindTo=sys-subsystem-net-devices-eth0.device
then systemd will fail the start the alias, and any dependent units
will time out. See
https://bugs.freedesktop.org/show_bug.cgi?id=52580
This is because unit_add_name() in device_add_escaped_name() will
return EEXIST.
The solution taken here is to call device_update_unit() on the alias
name. Thus if a unit with the alias name already exists, we reuse it;
otherwise a new unit is created. Creating multiple units for a single
device is perhaps suboptimal, but it's consistent with the treatment
of udev symlinks in device_process_new_device().
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This also enables time-based rotation (but not vacuuming) after 1month,
so that not more one month of journal is lost at a time per vacuuming.
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This should slightly optimize disk access patterns on rotating disks for
simple readers.
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initializing their basic fields
Under some circumstances this could lead to a segfault since we we
half-initialized a mount unit, then tried to hook it into the network of
things and while doing that recursively ended up looking at our
half-initialized mount unit again assuming it was fully initialized.
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instance actually created it
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If it is exported it would need to be prefixed, but since we need it
exclusively internally so far, simply move it to an internal header.
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This commit checks for a usage line which contains [{|]reload[|}"] (to
not errnously match force-reload).
Heuristics like this suck, but it solves a real problem and there
appears to be no better way...
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It seems the previous code was copy/pasted from context_detach_window()
but not updated.
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Checks were already in place to make sure that the number of
windows was limited to 64, but the count was never incremented
or decremented.
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systemctl status a and systemctl status a.service lead to same output but
systemctl status a.b and systemctl status a.b.service do not.
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This applies unit_name_mangle() to the specified unit names and hence
can handle weird characters nicely and will add unit suffixes as
necessary.
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The fstab generator adds Before=swap.target by default, and when creating
a custom .swap unit, you can also add Before=swap.target to the unit.
However, it is impossible to not have this ordering dependency right now.
Virtually all existing setups likely use the fstab generator, so this
change is unlikely to break anything.
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systemd.
Running as a user instance won't work at all if systemd isn't running as system
manager, so refuse to start in that case.
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context.
This patch does the dbus calls correctly.
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Use cases:
* iptables.service – atomically reload rules without having to flush
them beforehand (which may leave the system insecure if reload fails)
* rpc-nfsd.service – reexport filesystems after /etc/exports update
without completely stopping and restarting nfsd
(In both cases, the actual service is provided by a kernel module and
does not have any associated user-space processes, thus Type=oneshot.)
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AC_CHECK_FUNCS may be successful, even though name_to_handle_at and
'struct file_handle' are not available.
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From now on, always use ANSI-SQL-style comments in log streams, i.e.
prefix with --. We also suffix things with this, just to be nice...
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systemctl enable, disable, ... can also accept full path and in this case
we don't need to alter it.
https://bugzilla.redhat.com/show_bug.cgi?id=866346
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Stopped working after cfbc22ab 'journalctl: implement --since= and
--until for filtering by time'.
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When compiling without gcrypt, gcc emits an annoying warning.
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./src/journal/journald.h:123:114: warning: ‘struct ucred’ declared inside parameter list [enabled by default]
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Valgrind says:
==29176== Conditional jump or move depends on uninitialised value(s)
==29176== at 0x412A85: cunescape_length_with_prefix (util.c:1565)
==29176== by 0x40B351: dev_kmsg_record (journald-kmsg.c:301)
==29176== by 0x40B653: server_read_dev_kmsg (journald-kmsg.c:347)
==29176== by 0x40B701: server_flush_dev_kmsg (journald-kmsg.c:365)
==29176== by 0x409DE7: main (journald.c:1535)
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The MESSAGE_ID=... stanza will appear in countless number of places.
It is just too long to write it out in full each time.
Incidentally, this also fixes a typo of MESSSAGE is three places.
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