Exit _Exit task termination exit int status _exit int status os9 F$EXIT Exit is the normal means of terminating a task. Exit does any cleaning up operations required before terminating, such as flushing out any file buffers (see Standard i/o), but _exit does not. A task finishing normally, that is returning from "main()", is equivalent to a call - "exit(0)". The status passed to exit is available to the parent task if it is executing a "wait". wait()