man/man3c/pthread_sigmask.3c

/* cc thisfile.c -lthread -lpthread */
#define _REENTRANT /* basic first 3-lines for threads */
#include <pthread.h>
#include <thread.h>
thread_t user_threadID;
sigset_t new;
void *handler(\|), interrupt(\|);

int
main( int argc, char *argv[\|] ) {
 test_argv(argv[1]);

 sigemptyset(&new);
 sigaddset(&new, SIGINT);
 switch(*argv[1]) {

 case '0': /* POSIX */
 pthread_sigmask(SIG_BLOCK, &new, NULL);
 pthread_create(&user_threadID, NULL, handler,
 argv[1]);
 pthread_join(user_threadID, NULL);
 break;

 case '1': /* Solaris */
 thr_sigsetmask(SIG_BLOCK, &new, NULL);
 thr_create(NULL, 0, handler, argv[1], 0,
 &user_threadID);
 thr_join(user_threadID, NULL, NULL);
 break;
 } /* switch */

 printf("thread handler, # %d, has exited\en",user_threadID);
 sleep(2);
 printf("main thread, # %d is done\en", thr_self(\|));
 return (0)
} /* end main */

struct sigaction act;

void *
handler(char *argv1)
{
 act.sa_handler = interrupt;
 sigaction(SIGINT, &act, NULL);
 switch(*argv1) {
 case '0': /* POSIX */
 pthread_sigmask(SIG_UNBLOCK, &new, NULL);
 break;
 case '1': /* Solaris */
 thr_sigsetmask(SIG_UNBLOCK, &new, NULL);
 break;
 }
 printf("\en Press CTRL-C to deliver SIGINT signal to the
 process\en");
 sleep(8); /* give user time to hit CTRL-C */
 return (NULL)
}

void
interrupt(int sig)
{
 printf("thread %d caught signal %d\en", thr_self(\|), sig);
}

void test_argv(char argv1[\|]) {
 if(argv1 == NULL) {
 printf("use 0 as arg1 to use thr_create(\|);\en \e
 or use 1 as arg1 to use pthread_create(\|)\en");
 exit(NULL);
 }
}