STYLE
void follow(file_info_t *, enum STYLE, off_t);
void forward(FILE *, const char *, enum STYLE, off_t, struct stat *);
void reverse(FILE *, const char *, enum STYLE, off_t, struct stat *);
follow(file_info_t *files, enum STYLE style, off_t off)
forward(FILE *fp, const char *fn, enum STYLE style, off_t off,
r_reg(FILE *fp, const char *fn, enum STYLE style, off_t off, struct stat *sbp)
static void r_reg(FILE *, const char *, enum STYLE, off_t, struct stat *);
reverse(FILE *fp, const char *fn, enum STYLE style, off_t off,
getarg(int units, enum STYLE forward_style, enum STYLE backward_style,
enum STYLE *style, int *style_set, off_t *off)
static void getarg(int, enum STYLE, enum STYLE, enum STYLE *, int *, off_t *);
enum STYLE style;