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#include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <signal.h> #include <errno.h> /* Simple error handling functions */ #define handle_error_en(en, msg) \ do { errno = en; perror(msg); exit(EXIT_FAILURE); } while (0) static void * sig_thread(void *arg) { printf( "yyyyy, thread id is: %ld\n", pthread_self() ); sigset_t aset; int s, sig; sigemptyset(&aset); sigaddset(&aset, SIGQUIT); sigaddset(&aset, SIGUSR1); //s = pthread_sigmask(SIG_BLOCK, &aset, NULL); sigset_t *set = (sigset_t *) arg; for (;;) { s = sigwait(set, &sig); if (s != 0) handle_error_en(s, "sigwait"); printf("Signal handling thread got signal %d\n", sig); } } static void handler( int arg ) { printf( "xxxxx, thread id is: %ld\n", pthread_self() ); } int main(int argc, char *argv[]) { pthread_t thread; sigset_t set; int s; /* Block SIGINT; other threads created by main() will inherit * a copy of the signal mask. */ signal( SIGQUIT, handler ); // if (s != 0) // handle_error_en(s, "pthread_sigmask"); s = pthread_create(&thread, NULL, &sig_thread, (void *) &set); sigemptyset(&set); sigaddset(&set, SIGQUIT); sigaddset(&set, SIGUSR1); //s = pthread_sigmask(SIG_BLOCK, &set, NULL); if (s != 0) handle_error_en(s, "pthread_create"); printf( "sub thread with id: %ld\n", thread ); /* Main thread carries on to create other threads and/or do * other work */ pause(); /* Dummy pause so we can test program */ }