DOS_FILE
DOS_FILE *f;
if ((f = malloc(sizeof (DOS_FILE))) == NULL) {
bzero(f, sizeof (DOS_FILE));
DOS_FILE *f = (DOS_FILE *)fd->f_fsdata;
DOS_FILE *f = (DOS_FILE *)fd->f_fsdata;
DOS_FILE *f = (DOS_FILE *)fd->f_fsdata;
DOS_FILE *f = (DOS_FILE *)fd->f_fsdata;