Notification when network becomes available?

Is it possible to get some notification into user space when a
network connection (Ethernet or WLAN) becomes available? I see
messages from the kernel via printk() when I insert or unplug the
patch cable from my NIC telling the link state has changed. Is this
notification also available i user space?

And is there something similar for WLAN, i.e. some notification when I
move into some hot spot? AFAIK, iwconfig can show I an AP is
reachable but I have to poll regulary with iwconfig to detect new
APs. Can this be done without polling?

urs

On 2005-01-11, Urs Thuermann <(E-Mail Removed)> wrote:
> patch cable from my NIC telling the link state has changed. Is this
> notification also available i user space?

There are many 'widgets' to show the status of network connections on
various desktops (Kde, Gnome...) just pick the one you like.

Davide

--
More systems have been wiped out by admins than any hacker could do
in a lifetime. - Rick Furniss

Urs Thuermann wrote:
> Is it possible to get some notification into user space when a
> network connection (Ethernet or WLAN) becomes available? I see
> messages from the kernel via printk() when I insert or unplug the
> patch cable from my NIC telling the link state has changed. Is this
> notification also available i user space?
>
> And is there something similar for WLAN, i.e. some notification when I
> move into some hot spot? AFAIK, iwconfig can show I an AP is
> reachable but I have to poll regulary with iwconfig to detect new
> APs. Can this be done without polling?
>

Have a look at ifplugd
<http://www.stud.uni-hamburg.de/users/lennart/projects/ifplugd/>.

--

Tauno Voipio
tauno voipio (at) iki fi