ctrlrunit
if ((unit = ctrlrunit(argv[i])) == -1) {
if ((unit = ctrlrunit(argv[i])) == -1) {
if ((unit = ctrlrunit(argv[1])) == -1) {
if ((argc < 1) || ((unit = ctrlrunit(argv[0])) == -1))
extern int ctrlrunit(char *str);