[maemo-developers] Starting a 3G traffic monitoring application for N900: some questions

[From: Thomas Perl]

Hi Andrea,

2010/11/29 a.grandi at gmail.com <a.grandi at gmail.com>:
> It's not easy to keep track of transfered data, so I'd like to write a
> desktop applet that monitor traffic and keep the amount updated.
> I'm going to write this in Qt/C++.
>
> I've some question before starting:
>
> 1) How can I detect, from a Qt/C++ application, if a 3G connection is
> estabilished and when it disconnects?

libconic can do that:

http://maemo.org/api_refs/5.0/5.0-final/libconic/

> 2) Is it ok if I monitor the trasmitted/received data using ifconfig?
> If yes, how can I execute ifconfig from an application running as
> user? (Usually you can only execute ifconfig if you "sudo gainroot"
> before).

There already exists a Personal Dataplan Monitor applet that might
already fulfill your use case :) And even if not, its source might be
a good starting point for your app (or simply add changes that you
need and submit a patch to Andrew):

http://maemo.org/downloads/product/Maemo5/personal-gprs-mon/

HTH.
Thomas