General :: Init.d Process Does Not Return To Prompt?

I have a script in /etc/rc.d/init.d named foo. I want to start/stop/restart my process as follows:$ foo start But I do not see the [OK] message once it starts. There is no shell prompt returned either. It seems that my own process is the problem. The executable that foo calls is built from this sample code:

int main()
{
do {
printf("Hello world
");
sleep(1);
} while (1);
}

Do I have to return some kind of signal handle for this to work?