Request for hints/pointers explaining the necessary support for dbus' UNIX_FD datatype ?

[rony]

Maybe an embarassing question, but one that also shows that my Linux
knowledge is not really the best (an understatement!), but may be needed
to be addressed in any case:

    what are UNIX_FDs used for and how is one supposed to use them in
    dbus ?

How important is it to support them? Is it already o.k. to be able to
accept and send arguments of type UNIX_FD (which I have implemented in
the ooRexx binding) or is there something else that must be supported in
addition? (Are there any working dbus examples somewhere using UNIX_FDs,
such that one can learn from them how to use these datatypes?)

I noticed that UNIX_FD values seem to be set by dbus which makes sure
that they get a unique counter value. However I have not found usages of
it so far, but noticed in another mailing on this list (dated July 15th,
2011, subject: "dbus-java for Bluethooth HDP"), that the Java
implementation does not support them at this time and that caused a
problem with a dbus service, "bluez".

Any hint/answer highly appreciated!

---rony
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/dbus/attachments/20110720/199efb13/attachment.html>