-C

Display the program copyright message and execute the command. 

-f

Remove shadow file entries that do not have corresponding UNIX files. 

-r

Perform a consistency check in all subdirectories in the volume. 

-s

Execute the command without a screen display. 

-u

Display the program usage message only. 

-V

Display the program version number and execute the command. 

-v

Execute the command in verbose mode, listing all affected files or directories. 

-y

Answer "yes" to all confirmation prompts during the execution of this command. 

dirname

Specify the relative or absolute path to the directory that serves as the root of the Macintosh volume that you want to check.