dos_to_dev
if (!(is_dos = dos_to_dev(argv[0], &devpath, &dos_num))) {
static boolean_t dos_to_dev(char *path, char **devpath, int *num);
static gboolean dos_to_dev(char *path, char **devpath, int *partnum);
if (!dos_to_dev(raw_device_file, &rdevpath, &dos_num)) {
if (!(is_dos = dos_to_dev(device_file, &devpath, &dos_num))) {
boolean_t dos_to_dev(char *path, char **devpath, int *num);