journal: rework vacuuming logic Implement a maximum limit on number of journal files to keep around. Enforcing a limit is useful on this since our performance when viewing pays a heavy penalty for each journal file to interleve. This setting is turned on now by default, and set to 100. Also, actully implement what 348ced909724a1331b85d57aede80a102a00e428 promised: use whatever we find on disk at startup as lower bound on how much disk space we can use. That commit introduced some provisions to implement this, but actually never did. This also adds "journalctl --vacuum-files=" to vacuum files on disk by their number explicitly.

Do not advertise .d snippets over main config file For daemons which have a main configuration file, there's little reason for the administrator to use configuration snippets. They are useful for packagers which need to override settings, but we shouldn't advertise that as the main way of configuring those services. https://bugs.freedesktop.org/show_bug.cgi?id=89397

journald: Support journald.conf.d directories in the usual search paths

journald: turn ForwardToSyslog= off by default After all, rsyslog and friends nowadays read their data directly from the journal, hence the forwarding is unnecessary in most cases.

journald: make SplitMode=uid the default Now that we actually can distuingish system and normal users there's no point in taking session information into account anymore when splitting up logs. This has the beenfit with that coredump information will actually end up in each user's own journal.

journald: add support for wall forwarding This will let journald forward logs as messages sent to all logged in users (like wall). Two options are added: * ForwardToWall (default yes) * MaxLevelWall (default emerg) 'ForwardToWall' is overridable by kernel command line option 'systemd.journald.forward_to_wall'. This is used to emulate the traditional syslogd behaviour of sending emergency messages to all logged in users.

journald: bump the journal per-unit ratelimit defaults Too many people kept hitting them, so let's increase the limits a bit. https://bugzilla.redhat.com/show_bug.cgi?id=965803

journal: Add sync timer to journal server Add option to force journal sync with fsync. Default timeout is 5min. Interval configured via SyncIntervalSec option at journal.conf. Synced journal files will be marked as OFFLINE. Manual sync can be performed via sending SIGUSR1.

journald.conf: remove MinSize= settings There's no point in making this configurable, so let's drop it in order to simplify configuration a bit.

journal: implement time-based rotation/vacuuming 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.

journald: make splitting up of journal files per-user configurable

journald: add new Seal= configuration option

journald: basic support for /dev/kmsg parsing

journal: default ImportKernel=no until we make use of structured logging

journal: move Storage=auto stanza to right file

journal: allow setting of a cutoff log level for disk storage, syslog, kmsg, console forwarding

journal: support changing the console tty to forward to

journald: refer to the correct man page Fix the reference to the journald.conf man page in the config file of the same name.

relicense to LGPLv2.1 (with exceptions) We finally got the OK from all contributors with non-trivial commits to relicense systemd from GPL2+ to LGPL2.1+. Some udev bits continue to be GPL2+ for now, but we are looking into relicensing them too, to allow free copy/paste of all code within systemd. The bits that used to be MIT continue to be MIT. The big benefit of the relicensing is that closed source code may now link against libsystemd-login.so and friends.

rename /etc/systemd/systemd-{login,journal}d.conf to {login,journal}d.conf