#!/usr/local/bin/cz --
use b
Main()
	if !tween(args, 2, 3)
		usage("file size [offset]")
	cstr file = arg[0]
	off_t size = atoll(arg[1])

	if args == 2
		create_hole(file, size)
	 else
		off_t offset = atoll(arg[2])
		insert_hole(file, offset, size)