ORG.FREEDESKTOP.LOGCONTROLorg.freedesktop.LogConORG.FREEDESKTOP.LOGCONTROL1(5)
NAME
org.freedesktop.LogControl1 - D-Bus interface to query and set logging
configuration
INTRODUCTION
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
The following interface is exposed:
node /org/freedesktop/LogControl1 {
interface org.freedesktop.LogControl1 {
properties:
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
@org.freedesktop.systemd1.Privileged("true")
readwrite s LogLevel = '...';
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
@org.freedesktop.systemd1.Privileged("true")
readwrite s LogTarget = '...';
@org.freedesktop.DBus.Property.EmitsChangedSignal("false")
readonly s SyslogIdentifier = '...';
};
interface org.freedesktop.DBus.Peer { ... };
interface org.freedesktop.DBus.Introspectable { ... };
interface org.freedesktop.DBus.Properties { ... };
};
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) call).
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
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 systemd-journald.
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 BusName=.)
SEE ALSO
systemd(1), journalctl(1), systemctl(1), systemd.service(5), syslog(3)
systemd 249 ORG.FREEDESKTOP.LOGCONTROL1(5)
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