box.ctl.on_shutdown()

Create a "shutdown trigger". The trigger-function will be executed whenever os.exit() happens, or when the server is shut down after receiving a SIGTERM or SIGINT or SIGHUP signal (but not after SIGSEGV or SIGABORT or any signal that causes immediate program termination).

Parameters:

• trigger-function (function) — function which will become the trigger function

• old-trigger-function (function) — existing trigger function which will be replaced by trigger-function

Returns

nil or function pointer

If the parameters are (nil, old-trigger-function), then the old trigger is deleted.

If you want to set a timeout for this trigger, use the set_on_shutdown_timeout function.