Receiving dbus signals using low-level C API

Krishna R sith.list at
Wed Jan 24 18:20:41 PST 2007

Need some more help, sorry for the trouble...

I am able to send and recv fsignals fine, but i see that signals get dropped that even possible?

To send the signal i do the following  steps in my app

exits program.

One the recv side i add a match rule and set a filter function.

If i run the send app manually a few times from cmd line, i rarely see in
the recv terminal that the signal has not been got (i use fprintfs).
It happens once in 30 or 40 tries i do. Randomly.

I have error checks and debug print statements for each of the calls so i
know none of calls themselves fail. Send app exits as a sucess but the recv
side never got the signal sent.

Are there any tips for debugging this kind of problem. Or am i missing
something here.


On 1/24/07, John (J5) Palmieri <johnp at> wrote:
> On Wed, 2007-01-24 at 16:27 -0500, Havoc Pennington wrote:
> >
> > > 1. Is this a correct way to recv signals? Do i have to do
> > > dbus_message_unref(message) in the filter function after handling it
> > > before i return?
> >
> > I don't believe so, I could misremember, but it would be documented if
> > you did have to probably.
> Hmm, wait.  I might be misremembering too.  The filter function may
> unref for you and I think I was thinking of needing to unref after
> creating a reply message.  So if one needs to keep a message around they
> need to ref it.
> --
> John (J5) Palmieri <johnp at>
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