1 /* Public domain. */ 2 main()3int main() 4 { 5 short x[4]; 6 7 x[0] = x[1] = 1; 8 if (getgroups(1,x) == 0) if (setgroups(1,x) == -1) _exit(1); 9 10 if (getgroups(1,x) == -1) _exit(1); 11 if (x[1] != 1) _exit(1); 12 x[1] = 2; 13 if (getgroups(1,x) == -1) _exit(1); 14 if (x[1] != 2) _exit(1); 15 _exit(0); 16 } 17