/* sig4.c - an example from the Solaris 2 manual.
     The following sample C code creates a thread (sigint) to  handle  the
     receipt of the SIGINT signal.
     In Solaris2 compile with -D_POSIX_PTHREAD_SEMANTICS switch.
 */
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>

static void *threadTwo(void *);
static void *threadThree(void *);
static void *sigint(void *);
sigset_t signalSet;
static void *threadTwo(void *arg)
{
 printf("hello world, from threadTwo [tid: %lu]\n",
                (unsigned long)pthread_self());
while(1)
{
    printf(" . ");
    usleep(1000);

}

 pthread_exit((void *)0);
}

void *sigint(void *arg)
{
 int sig;
 int err;

 printf("thread sigint [tid: %lu] awaiting SIGINT\n",
                (unsigned long)pthread_self());

 /*
    * use POSIX sigwait() -- 2 args: signal set, signum
    */
    while(1){
 err = sigwait(&signalSet, &sig);

 //sigemptyset(&signalSet);

// sets = pthread_sigmask(SIG_SETMASK, &signalSet, NULL);
printf("received signal is %d \n",sig );
 /* test for SIGINT; could catch other signals */
 if (sig == SIGINT)
 {
     printf("\nSIGINT signal %d caught by sigint thread [tid: %lu]\n",
                 sig, (unsigned long)pthread_self());
                    exit(0);
      pthread_exit((void *)0);

    }
}

}

void error(char *message)
{
 perror(message);
 kill(0, SIGTERM);
 exit(EXIT_FAILURE);
}

int main(void)
{
 pthread_t t1;
 pthread_t t2;
 pthread_t t3;

 sigfillset(&signalSet);
 /*
    * Block signals in initial thread. New threads will
    * inherit this signal mask.
    */
    sigprocmask(SIG_SETMASK, &signalSet, NULL);
 //pthread_sigmask(SIG_BLOCK, &signalSet, NULL);

 if (pthread_create(&t1, NULL, sigint, NULL))
     error("t1");

 printf("Creating threads\n");
 printf("##################\n");
 printf("press CTRL-C to deliver SIGINT to sigint thread\n");
 printf("##################\n");

while(1)
{
printf(" . ");
usleep(10000);
}
 if (pthread_join(t1, NULL))
     perror("join");
 printf("Bye!\n");
 return 0;
}