<!-- This configuration file controls the systemwide message bus.
Add a system-local.conf and edit that rather than changing this
file directly. -->

<!-- Note that there are any number of ways you can hose yourself
security-wise by screwing up this file; in particular, you
probably don't want to listen on any more addresses, add any more
auth mechanisms, run as a different user, etc. -->

<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-Bus Bus Configuration 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>

<!-- Our well-known bus type, do not change this -->
<type>system</type>

<!-- Run as special user -->
<user>messagebus</user>

<!-- Fork into daemon mode -->
<fork/>

<!-- We use system service launching using a helper -->
<standard_system_servicedirs/>

<!-- This is a setuid helper that is used to launch system services -->
<servicehelper>/usr/lib/dbus-1.0/dbus-daemon-launch-helper</servicehelper>

<!-- Write a pid file -->
<pidfile>/var/run/dbus/pid</pidfile>

<!-- Enable logging to syslog -->
<syslog/>

<!-- Only allow socket-credentials-based authentication -->
<auth>EXTERNAL</auth>

<!-- Only listen on a local socket. (abstract=/path/to/socket
means use abstract namespace, don't really create filesystem
file; only Linux supports this. Use path=/whatever on other
systems.) -->
<listen>unix:path=/var/run/dbus/system_bus_socket</listen>

<policy context="default">
<!-- All users can connect to system bus -->
<allow user="*"/>

<!-- Holes must be punched in service configuration files for
name ownership and sending method calls -->
<deny own="*"/>
<deny send_type="method_call"/>

<!-- Signals and reply messages (method returns, errors) are allowed
by default -->
<allow send_type="signal"/>
<allow send_requested_reply="true" send_type="method_return"/>
<allow send_requested_reply="true" send_type="error"/>

<!-- All messages may be received by default -->
<allow receive_type="method_call"/>
<allow receive_type="method_return"/>
<allow receive_type="error"/>
<allow receive_type="signal"/>

<!-- Allow anyone to talk to the message bus -->
<allow send_destination="org.freedesktop.DBus"/>
<!-- But disallow some specific bus services -->
<deny send_destination="org.freedesktop.DBus"
send_interface="org.freedesktop.DBus"
send_member="UpdateActivationEnvironment"/>
</policy>

<!-- Config files are placed here that among other things, punch
holes in the above policy for specific services. -->
<includedir>system.d</includedir>

<!-- This is included last so local configuration can override what's
in this standard file -->
<include ignore_missing="yes">system-local.conf</include>

<include if_selinux_enabled="yes" selinux_root_relative="yes">contexts/dbus_contexts</include>

<!-- increase default match rules limit from 512 to 5000 because the
aptdaemon needs relatively many per package in the queue -->
<limit name="max_match_rules_per_connection">5000</limit>
</busconfig>