#include <stdio.h>
#include <signal.h>
#include <errno.h>
#include <string.h>


int main(void)
{
	int err = 0;
	bool bShutdown = 0;
	sigset_t set, old;

	sigfillset(&set);
	sigdelset(&set,SIGTRAP);
//	sigdelset(&set, SIGINT );

	//
	//	Needed by gdb
	// 
	sigdelset(&set, SIGUSR1 );
	sigdelset(&set, SIGUSR2 );
	sigdelset(&set, SIGUNUSED );

   /* Java VM uses these signals in Linux */
   for(int s=SIGRTMIN; s <= SIGRTMAX - 4; s++)
		sigdelset(&set,s);

	if (pthread_sigmask(SIG_BLOCK, &set, 0) != 0)
		fprintf(stderr, "pthread_sigprocmask failed: %s\n", strerror(errno)); 

	//
	// Start additional threads
	//

	while (bShutdown == false)
	{ 
		int sig = 0; 
		siginfo_t info;

		if ((sig = sigwaitinfo(&set, &info)) == -1)
		{
			fprintf(stderr, "Received invalid signal -1.\n");
			continue;
		}

		switch (sig)
		{
			case SIGINT:
				fprintf(stderr, "Received SIGINT\n"); 
				// fall through
			case SIGTERM:
				fprintf(stderr, "Got SIGINT/SIGTERM signal, shutting down\n"); 
				bShutdown = true;
				break;
			default:
				fprintf(stderr, "Ignoring the unexpected signal, %d\n", sig);
				break;
		}
	}
	//
	// Do additional cleanup
	//
	return 0;
}