org.freedesktop.logcontrol1(5) — Linux manual page



NAME         top

       org.freedesktop.LogControl1 - D-Bus interface to query and set
       logging configuration

INTRODUCTION         top

       org.freedesktop.LogControl1 is a generic interface that is intended
       to be used by any daemon which allows the log level and target to be
       set over D-Bus. It is implemented by various daemons that are part of
       the systemd(1) suite.

       It is assumed that those settings are global for the whole program,
       so a fixed object path is used. The interface should always be
       available under the path /org/freedesktop/LogControl1.

DESCRIPTION         top

       The following interface is exposed:

           node /org/freedesktop/LogControl1 {
             interface org.freedesktop.LogControl1 {
                 readwrite s LogLevel = '...';
                 readwrite s LogTarget = '...';
                 readonly s SyslogIdentifier = '...';
             interface org.freedesktop.DBus.Peer { ... };
             interface org.freedesktop.DBus.Introspectable { ... };
             interface org.freedesktop.DBus.Properties { ... };

       LogLevel describes the syslog(3)-style log-level, and should be one
       of "emerg", "alert", "crit", "err", "warning", "notice", "info",
       "debug", in order of increasing verbosity.

       LogTarget describes the log target (mechanism). It should be one of
       "console" (log to the console or standard output), "kmsg" (log to the
       kernel ring buffer), "journal" (log to the journal natively, see
       systemd-journald.service(8)), "syslog" (log using the syslog(3)

       Those two properties are writable, so they may be set by sufficiently
       privileged users.

       SyslogIdentifier is a read-only property that shows the "syslog
       identifier". It is a short string that identifies the program that is
       the source of log messages that is passed to the syslog(3) call.

TOOLS         top

       journalctl option -p/--priority= may be used to filter log messages
       by log level, option -t/--identifier= may be used to by the syslog
       identifier, and filters like "_TRANSPORT=syslog",
       "_TRANSPORT=journal", and "_TRANSPORT=kernel" may be used to filter
       messages by the mechanism through which they reached

       systemctl log-level and systemctl log-target verbs may be used to
       query and set the LogLevel and LogTarget properties of the service
       manager.  systemctl service-log-level and systemctl
       service-log-target may similarly be used for individual services.
       (Services must have the BusName= property set and must implement the
       interface described here. See systemd.service(5) for details about

SEE ALSO         top

       systemd(1), journalctl(1), systemctl(1), systemd.service(5),

COLOPHON         top

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       ⟨⟩ on 2020-11-01.  (At that
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systemd 247                                   ORG.FREEDESKTOP.LOGCONTROL1(5)