9.7 Exiting

(exit [v]) → any

v : any/c = #t

Passes v to the current exit handler. If the exit handler does not escape or terminate the thread, #<void> is returned.

(exit-handler) → (any/c . -> . any)

(exit-handler proc) → void?

proc : (any/c . -> . any)

A parameter that determines the current exit handler. The exit handler is called by exit.

The default exit handler in the mzscheme executable takes any argument and shuts down the OS-level Scheme process. The argument is used as the OS-level exit code if it is an exact integer between 1 and 255 (which normally means “failure”); otherwise, the exit code is 0, (which normally means “success”).