how to expose methods on system bus using Qtdbus - dbus

Question

I want to expose methods of my application on System bus using Qt Dbus in Qt Creator.
while using session bus ,the methods get exposed, but with system bus I am only able to see the Service name with which i registered but no methods to be exposed under it.(I am checking it in D-feet)
What should i do ?

Answer 1

You have to place your config file (e.g: example-dbus.conf) in /etc/dbus-1/system.d/
The example-dbus.conf file looks like:
<!DOCTYPE busconfig PUBLIC
"-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
<!-- Only root user can own the service -->
<policy user="root">
<allow own="com.company.qtdbus"/>
</policy>
<!-- Allow anyone to invoke methods on server, except SetHostName -->
<policy context="default">
<allow send_destination="com.company.qtdbus"/>
<allow receive_sender="com.company.qtdbus"/>
<deny send_destination="com.company.qtdbus"
send_interface="com.company.qtdbus.Server" send_member="SetHostName"/>
</policy>
<!-- Allow everything, including access to SetHostName -->
<policy user="root">
<allow send_destination="com.company.qtdbus"/>
<allow receive_sender="com.company.qtdbus"/>
</policy>
</busconfig>
Restart the dbus daemon with /etc/init.d/d-bus restart and now you should be allowed to connect to the system bus. In fact, if you not allowed to connect to the system bus, a error message will be shown.