I have a machine running as VM as Hyper-V with tinycore.I am running a script in bootsync.sh and it starts a blocking menu. Till the user do not select an option from the menu, it remains blocked on the menu which is what I want. However, when I try to shutdown the VM from Hyper-V, the machine do not shutdown as the menu is still blocking. How can I make the tiny core accept the shutdown signal?