Provided by: dbus-broker_35-2_amd64 
NAME
dbus-broker-launch - Launcher for D-Bus Message Brokers
SYNOPSIS
dbus-broker-launch [ OPTIONS ]
dbus-broker-launch --version
dbus-broker-launch --help
DESCRIPTION
dbus-broker-launch is a launcher for dbus-broker, spawning and managing a D-Bus Message Bus. The launcher
aims to be fully compatible to the D-Bus reference implementation dbus-daemon(1), supporting the same
configuration syntax and runtime environment.
Each instance of dbus-broker-launch manages exactly one message bus. Each message bus is independent. The
configuration file can either be specified via the command-line, or the default is picked from
/usr/share/dbus-1/. Nearly all of the configuration attributes are supported. See dbus-daemon(1) for
details on the configuration syntax.
OPTIONS
The following command-line options are supported. If an option is passed, which is not listed here, the
launcher will deny startup and exit with an error.
-h, --help
print usage information and exit immediately
--version
print build-version and exit immediately
--audit
enable logging to the linux audit subsystem (no-op if audit support was not compiled in; Default:
off)
--config-file=PATH
config file to use (Default: /usr/share/dbus-1/{system,session}.conf)
--scope=SCOPE
select scope to run in (one of: system, user; Default: system)
LOGGING
By default, dbus-broker-launch logs messages to the system journal. The messages are augmented with lots
of metadata, so be sure to check the additional journal-fields. The human-readable log-message is
intentionally kept short.
On startup and shutdown, the launcher logs initial messages that contain information on the parsed
configuration files and service definitions. No other log-messages are generated, except those
originating in dbus-broker(1).
SCOPE
Unlike dbus-daemon(1), dbus-broker-launch activates all services as systemd units. Services that already
come with a systemd-unit are activated as usual, but services that lack a systemd unit are activated as
transient unit, with an ad-hoc unit-file generated at runtime. This guarantees that all services run in a
well-defined environment.
The --scope parameter defines which systemd instance the launcher shall use to activate services. In case
of system, the launcher will use the system instance of systemd. In case of user, the user instance is
used instead.
Furthermore, the selected scope also defines which configuration file is used if none is specified on the
command-line.
The selected scope does not have any further effect. It is only needed to define the activation
environment for loaded service definitions. If no activatable services are declared, the scope will have
no effect at all.
SOCKETS
The socket to listen on for client connections must be created and passed to dbus-broker-launch by its
parent process. The protocol must follow the socket-activation as defined by systemd.socket(1). Only a
single socket is supported right now.
Additional <listen>%path%</listen> attributes in the configuration are ignored.
PRIVILEGES
The launcher needs read-access to its configuration file. Other than that, no privileges are needed. If
the <user>%user%</user> configuration attribute is used, the launcher will drop privileges when executing
dbus-broker.
If activatable services are declared, the launcher will need access to the corresponding systemd
instance. The launcher must be allowed to spawn transient units, as well as manage units declared in the
service definitions.
SEE ALSO
dbus-daemon(1) dbus-broker(1)
DBUS-BROKER-LAUNCH(1)