Hi Gary,

Am Montag, dem 15.02.2021 um 23:13 +0000 schrieb Gary Huband:

I have RAUC integrated with a Yocto Morty build (Linux 4.14) running on an iMX7D (arm). I'm trying to verify that the RAUC dbus interface is working, but I get an error when I use dbus-send:

do you do recent development on morty? This *very* old now. Don't you have to option to switch to a recent release?

# dbus-send --system --dest=de.pengutronix.rauc --type=method_call --print-reply /de/pengutronix/rauc de.pengutronix.rauc.GetSlotStatusError org.freedesktop.DBus.Error.UnknownMethod: No such interface 'de.pengutronix.rauc' on object at path /de/pengutronix/rauc

The proper call would be:

dbus-send --system --dest=de.pengutronix.rauc --type=method_call --print-reply / de.pengutronix.rauc.Installer.GetSlotStatus

So, the issue is that the object path in RAUC is only "/", which is possible but actually not the convention for D-Bus interfaces and does not allow versioned interfaces, etc.

In the documentation we have some examples using the D-Bus API with 'busctl': https://rauc.readthedocs.io/en/latest/using.html#using-the-d-bus-api

Hope that helps?

Best regards

Enrico

When I try introspection:

# dbus-send --system --dest=de.pengutronix.rauc --type=method_call --print-reply /de/pengutronix/rauc org.freedesktop.DBus.Introspectable.Introspect
method return time=1605228956.729035 sender=:1.6 -> destination=:1.8 serial=8 reply_serial=2
string "<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">

<node>
</node>
"

The RAUC service is on the system bus:

# dbus-send --system --dest=org.freedesktop.DBus --type=method_call --print-reply /org/freedesktop/DBus org.freedesktop.DBus.ListNames
method return time=1605229469.748648 sender=org.freedesktop.DBus -> destination=:1.13 serial=3 reply_serial=2
array [
string "org.freedesktop.DBus"
string "org.freedesktop.login1"
string "org.freedesktop.systemd1"
string "de.pengutronix.rauc"
string "org.freedesktop.Avahi"
string ":1.13"
string ":1.0"
string ":1.1"
string "org.freedesktop.network1"
string ":1.2"
string ":1.3"
string "org.freedesktop.resolve1"
string ":1.4"
string ":1.6"
]

Any help with what I am doing wrong is appreciated.

Gary

Gary Huband
Sr. Software and Systems Engineer

Office: 434.284.8071 x720
Direct: 434.260.4995
Gary@MissionSecure.com

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