The application’s program name, as it appears on the command-line, may be
accessed from Clon. You may find it easier to do this way, as Clon
wraps around implementation-dependent access methods to argv[0].
In order to retrieve argv[0], use the progname function
like this: (progname). In fact, it is possible to modify
Clon’s notion of the program name, for example in cases where
argv[0] is not very informative (see Delivering Scripts).