Re: org.freedesktop.NetworkManager.Settings.PropertiesChanged deprecated

[mh mike franken de]

On Donnerstag, 15. Juli 2021 10:43:27 CEST Andrei Borzenkov wrote:
> On Thu, Jul 15, 2021 at 11:27 AM <mh mike franken de> wrote:
> > On Donnerstag, 15. Juli 2021 06:45:06 CEST Andrei Borzenkov via
> > networkmanager-list wrote:
> > [...]
> >
> > > > #!/usr/bin/perl -w
> > > >
> > > > use strict;
> > > >
> > > > use Data::Dumper;
> > > > $Data::Dumper::Sortkeys = 1;
> > > > $Data::Dumper::Indent = 1;
> > > > use Net::DBus;
> > > > use Net::DBus::Dumper;
> > > > use Net::DBus::Reactor;
> > > >
> > > > my $oBUS = Net::DBus->system || die $!;
> > > > my $nm = "org.freedesktop.NetworkManager";
> > > > my $oNM = $oBUS->get_service( $nm ) || die $!;
> > > > my $nmobjpath = "/org/freedesktop/NetworkManager";
> > > > my $nmif = "org.freedesktop.NetworkManager";
>
> my $nmif = "org.freedesktop.DBus.Properties";
>
> > > > my $oNMIF = $oNM->get_object( $nmobjpath, $nmif ) || die $!;
> > > >
> > > > $nmobjpath = "/org/freedesktop/NetworkManager/Settings";
> > > > $nmif = "org.freedesktop.NetworkManager.Settings";
>
> my $nmif = "org.freedesktop.DBus.Properties";
>
> > > > my $oNMIFS = $oNM->get_object( $nmobjpath, $nmif ) || die $!;
> > > >
> > > > $oNMIF->connect_to_signal(
> > > >
> > > >   "PropertiesChanged", sub {
> > > >   
> > > >     &{ \&dbnm_onNMPropertiesChanged }( $oNM, $oNMIF, $oNMIFS, @_ );
> > > >   
> > > >   }
> > > >
> > > > );
> > > > my $reactor = Net::DBus::Reactor->main() || die $!;
> > > > $reactor->run() || die $!;
> > > >
> > > > sub dbnm_onNMPropertiesChanged {
> > > >
> > > >   my( $oNM, $oNMIF, $oNMIFS, $props ) = @_;
>
> my( $oNM, $oNMIF, $oNMIFS, $interface, $props, $invalidated_props ) = @_;
>
> > > >   print "\n- props -\n", Dumper( $props ), "\n--\n";
> > > >
> > > > }
> > >
> > > NM PropertiesChanged and D-Bus
> > > org.freedesktop.DBus.Properties.PropertiesChanged have different
> > > signatures. You are dumping interface name, not properties dictionary.
> >
> > I am not sure, I understand this:
> > The example above is the one for NetworkManager's PropertiesChanged
> > signal.
> > It worked perfectly as long as this signal existed.
>
> If you replace NM signal with DBus signal you also need to change
> handler to look for different parameter
>
> > Besides that, what does "signature" mean in this context? Different
> > parameters?
>
> Yes.

So last questions regarding signatures:
A handler only is accepted, if all parameters are correct?
Or - a handler is accepted, but not executed, if paramaters are not correct?

Thx and bye.
Michael.