Hi all:
   When I develop one feature for Luci, i want that  clicking "save & apply" on Luci to run my script on.
   Like "system" or "network" configuration , "save & apply" may trigger /etc/init.d/system restart or /etc/init.d/network reload, i guess. But really i don't know how does Luci implement this triggering. i try to search "init.d" in Luci code, it seems that Luci doesn't call init.d 's scirpt to update config.
   Could anyone give some idea? Thank you.

Hi ,
I have 2 solutions for you.
a.First:
You can use "Save & Apply Hooks" to trigger your own script.
    Link :  https://github.com/elationfoundation/lu … del-cbi.md
   
For example ,I modified the "system.lua"
   (In my case ,it located :  src/modules/admin-cpxwrt/luasrc/model/cbi/admin_system/system.lua)

    +function m.on_after_commit(map) 
    +          luci.sys.call(" <my script ^_^>  restart ")
    +end

b.Second:
you can modify the  "/etc/config/ucitrack"
For example :
      + config system
      +       list affects network
It means after "save & apply"  it will restart both /etc/init.d/system and /etc/init.d/network

Hope it helps