ssize_t read_string_list_or_die(const char *, const char * const[],
const char *);
-u64 get_size(const char *, int);
-unsigned get_blocksize(const char *, int);
-int open_for_format(const char *, bool);
+u64 get_size(int);
+unsigned get_blocksize(int);
+struct dev_opts;
+int open_for_format(struct dev_opts *, bool);
bool ask_yn(void);