ways. If the password is known, use the @option{-p} option
(documented below) or allow @command{pspp-convert} to prompt for it.
If the password is unknown, use the @option{-a} and @option{-l}
-options to specify how to search for it.
+options to specify how to search for it, or @option{--password-list}
+to specify a file of passwords to try.
Use @code{-O @var{extension}} to override the inferred format or to
specify the format for unrecognized extensions.
@item --password-length=@var{max-length}
Specifies the maximum length of the passwords to try.
+@item --password-list=@var{file}
+Specifies a file to read containing a list of passwords to try, one
+per line. If @var{file} is @file{-}, reads from stdin.
+
@item -h
@itemx --help
Prints a usage message on stdout and exits.