read_vtoc
retval = ((err = read_vtoc(fd, &vtoc)) >= 0) ? 0 : err;
} else if ((rc = read_vtoc(fd, &vtoc)) >= 0) {
extern int read_vtoc __P((int fd, struct vtoc *vtoc));
if ((ret = read_vtoc(fd, oldvtocp)) < 0)
extern int read_vtoc(int, struct vtoc *);