int mbx_write(char *, int, FILE *, int, long, long, off_t, int, int);
int mbx_copy (char *, int, int, int, int, char *, int);
int mbx_size (int, off_t, off_t);
int mbx_write(char *, int, FILE *, int, long, long, off_t, int, int);
int mbx_copy (char *, int, int, int, int, char *, int);
int mbx_size (int, off_t, off_t);