getnextgid(int *gidp, int lo, int hi)
getnextgid(uid_t *gidp, uid_t lo, uid_t hi)
getnextgid(int *gidp, int lo, int hi){	for (*gidp = lo ; *gidp < hi ; *gidp += 1) {		if (getgrgid((gid_t)*gidp) == NULL) {			return 1;		}	}	return 0;}