[systemd-devel] Reading an "ao" signature message with the sdbus c library?

[James Johnson]

Hello,

Can someone please point me to the correct method for reading an "ao"
signature dbus message using the sd_bus C api?

I am trying to read all the network devices with the following call:

  result = sd_bus_get_property(m_bus, "org.freedesktop.NetworkManager",
                                 "/org/freedesktop/NetworkManager",
                                 "org.freedesktop.NetworkManager",
                                 "AllDevices", &error,
                                 &msgCall, "ao");
I have tried:

char * ptr;
size_t size;

result = sd_bus_message_read_array(msgCall, 'o', &ptr, &size);

as well as:

result = sd_bus_message_read(msgCall, "ao", ptr);

but these both return an error. I am not sure what method to use to parse
the returned message when it is an array of path objects.

Please note this interface gives me the following when executed via the
busctl command:

[jjohnson at macbookpro]$ busctl --verbose get-property
org.freedesktop.NetworkManager /org/freedesktop/NetworkManager
org.freedesktop.NetworkManager AllDevices
ARRAY "o" {
        OBJECT_PATH "/org/freedesktop/NetworkManager/Devices/1";
        OBJECT_PATH "/org/freedesktop/NetworkManager/Devices/3";
        OBJECT_PATH "/org/freedesktop/NetworkManager/Devices/11";
        OBJECT_PATH "/org/freedesktop/NetworkManager/Devices/12";
};


Thanks!
Jimmy
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