main()1 main() 2 { 3 short x[4]; 4 5 x[0] = x[1] = 1; 6 if (getgroups(1,x) == 0) if (setgroups(1,x) == -1) _exit(1); 7 8 if (getgroups(1,x) == -1) _exit(1); 9 if (x[1] != 1) _exit(1); 10 x[1] = 2; 11 if (getgroups(1,x) == -1) _exit(1); 12 if (x[1] != 2) _exit(1); 13 _exit(0); 14 } 15