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systemd-stable/extras/dbus/etc/dbus-1/system.d/udev_sysbus_policy.conf

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[PATCH] D-BUS patch for udev-008 Attached is a patch against udev-008 to send out a D-BUS message when a device node is added or removed. Using D-BUS lingo, udev acquires the org.kernel.udev service and sends out a NodeCreated or NodeDeleted signal on the org.kernel.udev.NodeMonitor interface. Each signal carries two parameters: the node in question and the corresponding sysfs path. [Note: the D-BUS concepts of service, interface, object can be a bit confusing at first glance] An example program listening for these messages looks like this #!/usr/bin/python import dbus import gtk def udev_signal_received(dbus_iface, member, service, object_path, message): [filename, sysfs_path] = message.get_args_list() if member=='NodeCreated': print 'Node %s created for %s'%(filename, sysfs_path) elif member=='NodeDeleted': print 'Node %s deleted for %s'%(filename, sysfs_path) def main(): bus = dbus.Bus(dbus.Bus.TYPE_SYSTEM) bus.add_signal_receiver(udev_signal_received, 'org.kernel.udev.NodeMonitor', # interface 'org.kernel.udev', # service '/org/kernel/udev/NodeMonitor') # object gtk.mainloop() if __name__ == '__main__': main() and this is the output when hot-plugging some usb-storage. [david@laptop udev-008]$ ~/node_monitor.py Node /udev/sda created for /block/sda Node /udev/sda1 created for /block/sda/sda1 Node /udev/sda1 deleted for /block/sda/sda1 Node /udev/sda deleted for /block/sda The patch requires D-BUS 0.20 or later while the python example program requires D-BUS from CVS as I only recently applied a patch against the python bindings.
2003-12-08 20:19:19 +03:00
<!DOCTYPE busconfig PUBLIC
"-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
<!-- This configuration file specifies the required security policies
for udev to work. -->
<!-- Only root can own the udev service and only root can use the
org.kernel.udev.NodeMonitor interface to send signals -->
<policy user="root">
<allow own="org.kernel.udev"/>
<allow send_interface="org.kernel.udev.NodeMonitor"/>
</policy>
<!-- Allow anyone to listen to the org.kernel.udev.NodeMonitor interface
for messages send from the owner of the org.kernel.udev service -->
<policy context="default">
<allow receive_interface="org.kernel.udev.NodeMonitor"/>
</policy>
</busconfig>