[완료] 데몬이 종료시그널을 받기전까지 블럭시킬려면 어떻게 해야되나요??

boolean Daemonize()
{
	pid_t pid;
	if ( (pid = fork()) < 0 )
	{
		PERROR("fail to daemonize\n");
		return FALSE;
	}
	else if (pid != 0)
	{
		exit(0);		// parent goes bye-bye
	}
 
	// child continues
	setsid();			// become session leader
	chdir("/");			// change working directory
	umask(0);
 
	return TRUE;
}
 
boolean InitSignalSetForTermination(sigset_t* a_sigset)
{
	if ( !a_sigset )
	{
		PERROR("arg is NULL\n");
		return FALSE;
	}
 
	if ( sigemptyset(a_sigset) == -1
		|| sigaddset(a_sigset, SIGINT) == -1
		|| sigaddset(a_sigset, SIGTERM) == -1 )
	{
		PERROR("fail to init signal set\n");
		return FALSE;
	}
 
	return TRUE;
}
 
boolean BlockSignalsOfSignalSet(sigset_t* a_sigset)
{
	int retCode;
 
	if ( !a_sigset )
	{
		PERROR("arg is NULL\n");
		return FALSE;
	}
 
	retCode = pthread_sigmask(SIG_BLOCK, a_sigset, NULL);
	if ( retCode )
	{
		PERROR("fail to set signal mask: %d\n", retCode );
		return FALSE;
	}
 
	return TRUE;
}
 
int WaitUntilWantedSignalReceived(sigset_t* a_sigset)
{
	if ( !a_sigset )
	{
		PERROR("arg is NULL\n");
		return FALSE;
	}
 
	while ( TRUE )
	{
		int sigNum;
		int result = 0;
 
		sigwait(a_sigset, &sigNum);
		result = sigismember(a_sigset, sigNum);
		if ( result == 1 )
		{
			PDEBUG("wanted signal(%d) is received\n", sigNum);
			return sigNum;
		}
 
		if ( result == -1 )
		{
			PDEBUG("fail to check received signal(%d)\n", sigNum);
			break;
		}
 
		PDEBUG("other signal(%d) is received\n", sigNum);
	}
 
	return -1;
}
 
void CreateYourOwnWorkingThreads();
void DeleteYourOwnWorkingThreads();
 
int main()
{
	sigset_t sigSet;
 
	Daemonize();
	InitSignalSetForTermination(&sigSet);
	BlockSignalsOfSignalSet(&sigSet);
 
	CreateYourOwnWorkingThreads();
 
	WaitUntilWantedSignalReceived(&sigSet);
 
	DeleteYourOwnWorkingThreads();
 
	return 0;
}