I am working on an application where I need to detect a system shutdown.
However, I have not found any reliable way get a notification on this event.
I know that on shutdown, my app will receive a
There is no way to determine if a
SIGTERM is a part of a shutdown sequence. To detect a shutdown sequence you can either use use
rc.d scripts like ereOn and Eric Sepanson suggested or use mechanisms like DBus.
However, from a design point of view it makes no sense to ignore
SIGTERM even if it is not part of a shutdown.
SIGTERM's primary purpose is to politely ask apps to exit cleanly and it is not likely that someone with enough privileges will issue a
SIGTERM if he/she does not want the app to exit.