int get_root_path(int want, char *fsname, int *outfd, char *path, int index);
int root_ioctl(const char *mdtname, int opc, void *data, int *mdtidxp,
int want_error);
int get_root_path(int want, char *fsname, int *outfd, char *path, int index);
int root_ioctl(const char *mdtname, int opc, void *data, int *mdtidxp,
int want_error);