On Thu, Apr 12, 2018 at 2:55 AM, Thomas Haller <[email protected]> wrote:
> On Wed, 2018-04-11 at 23:17 -0400, Doug Torrance wrote:
> > Hello,
> >
> > I'm coding a small utility using libnm. I'd like the bitrate of wifi
> > devices to update over time, just like in the "Connection
> > Information" dialog of nm-applet. However, the bitrate never seems
> > to change.
> >
> > The code below illustrates my problem:
> >
> > #include <NetworkManager.h>
> > #include <unistd.h>
> > #include <stdio.h>
> >
> > int main(int argc, char *argv[])
> > {
> > NMClient *client;
> > const GPtrArray *devices;
> > NMDevice *device;
> >
> > client = nm_client_new(NULL, NULL);
> > devices = nm_client_get_devices(client);
> > device = g_ptr_array_index(devices, 0);
> >
> > while (1) {
> > printf("%d\n",
> >
> > nm_device_wifi_get_bitrate(NM_DEVICE_WIFI(device)));
> > sleep(5);
> > }
>
> you never iterate the mainloop, hence, no D-Bus signals from
> NetworkManager are processed, and the value never changes.
>
> You need to run the mainloop, like g_main_loop_run() or
> g_main_context_iterate().
>
> Also, note that unless you keep references to the instances, they might
> be destroyed while the mainloop processes events. So, you could take a
> reference, but better is probably to re-fetch it every time (or watch
> whether the device gets deleted in the meantime, by listening to
> signals).
That worked perfectly -- thank you!
Doug
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