mkdev
struct dev *mkdev(char *, struct aparams *, int, int);
mkdev(default_devs[i], &par, 0, autovol);
d = mkdev(optarg, &par, hold, autovol);
a->dev = mkdev(optarg, &par, hold, autovol);
mkdev(default_devs[i], &par, 0, autovol);