in my scenario I want to run a script when my device is not connected.
specifically, I use an GliNet device that extends my gateway ...
when the device is connected the wlan-sta virtual interface is activated and by executing the iw command the following result is obtained:
$iw wlan-sta info
Interface wlan-sta
ifindex 12
wdev 0x8
addr e4:95:6e:aa:aa:aa
ssid MYESSID
type managed
wiphy 0
channel 1 (2412 MHz), width: 20 MHz, center1: 2412 MHz
txpower 18.00 dBm
when the device is not connected, the interface does not exist (the iw command does not recognize wlan-sta as an interface, just as wlan-sta does not even appear in the output of ifconfig ...)
my question is: how can I insert a trigger that goes to perform operations (a trivial script) when wlan-sta is enabled / disabled?
I'd like to follow a best practice and not set up a crontab or use software that acts as a watcher ...
thank you for your support 