Luci change monitor

For Developers
1

I am writing a daemon for LEDE/OpenWRT, and I would like to reload configuration whenever there is a change by the user. So I'd like to detect if someone press "apply" on the GUI. I bet that this is done using ubus. My daemon is written in lua. Could you provide how to catch such events?

Thank you,
Levente

2

Please provide more details about what you want to do. A specific app? Any config in the system?

There is already existing functionality in procd (and old ucitrack system) for reloading/restarting necessary apps when config changes.

3

I'm writing an application that checks network connectivity, and when the network is up/down for whatever reason, it changes GPIO lines etc... I store configurations in the UCI system like which GPIO lines to use. I want this to be "real time", i.e. if someone changes something, my daemon shall react asap. I don't want to poll the configurations as it'd take too long... there are also an LTE modem there I shall manage.

Everything works as expected, I only miss the configuration monitoring function.

Thanks,
Lev

4

Check network connectivity using hotplug event:

cat<<'EOF' > /etc/hotplug.d/iface/99-wan-up-down
#!/bin/sh
[ "$ACTION" = "ifup" -a "$INTERFACE" = "wan" ] && {
    logger "wan up"
    sleep 10
    sh -x /etc/wan_up.sh
}
[ "$ACTION" = "ifdown" -a "$INTERFACE" = "wan" ] && {
    logger "wan down"
    sleep 11
    sh -x /etc/wan_down.sh
}
exit 0
EOF

chmod +x /etc/hotplug.d/iface/99-wan-up-down