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<!-- 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>@DBUS_USER@</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>@DBUS_LIBEXECDIR@/dbus-daemon-launch-helper</servicehelper>
<!-- Write a pid file -->
<pidfile>@DBUS_SYSTEM_PID_FILE@</pidfile>
<!-- 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>@DBUS_SYSTEM_BUS_DEFAULT_ADDRESS@</listen>
<policy context="default">
<!-- Deny everything then punch holes -->
<deny send_interface="*"/>
<deny receive_interface="*"/>
<deny own="*"/>
<!-- But allow all users to connect -->
<allow user="*"/>
<!-- Allow anyone to talk to the message bus -->
<!-- FIXME I think currently these allow rules are always implicit
even if they aren't in here -->
<allow send_destination="org.freedesktop.DBus"/>
<allow receive_sender="org.freedesktop.DBus"/>
<!-- allow sending valid replies -->
<allow send_requested_reply="true" send_type="method_return"/>
<allow send_requested_reply="true" send_type="error"/>
<!-- allow receiving valid replies -->
<allow receive_requested_reply="true"/>
<!-- Note: the rule above also allows receiving of all non-reply messages
that are not denied later. See:
https://bugs.freedesktop.org/show_bug.cgi?id=18229
Potentially this will be replaced in the future by the
following two rules:
<allow receive_requested_reply="true" receive_type="method_return"/>
<allow receive_requested_reply="true" receive_type="error"/>
-->
<!-- disallow changing the activation environment of system 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>
</busconfig>
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