extern int renamefile (const struct vol *, int, char *, char *, char *, struct adouble *);
extern int copyfile (const struct vol *, const struct vol *, int, char *, char *, char *, struct adouble *);
extern int deletefile (const struct vol *, int, char *, int);
extern int renamefile (const struct vol *, int, char *, char *, char *, struct adouble *);
extern int copyfile (const struct vol *, const struct vol *, int, char *, char *, char *, struct adouble *);
extern int deletefile (const struct vol *, int, char *, int);