int f=1;
void test(int a) {printf("%d\n", getpid()); f=0;};
int main(int ac, char **av) {
int p1, p2;
struct sigaction a;
a.sa_handler = test;
sigaction(SIGINT, &a, NULL);
if(ac == 1) {
p1=fork();
if((p2=fork()) > 0)
execl(av[0], av[0], "1", NULL);
}
while(f);
return 0;
}