test.cpp

#include <signal.h>

#include <sys/types.h>

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>

void new_op(int,siginfo_t*,void*);

void *func(void *) 
{
	printf("new thread %lu\n", pthread_self() ) ;
	sleep(10) ;
return NULL ;
}
int main(int argc,char**argv)

{

	pthread_t tid ;
	pthread_create(&tid, NULL, func, NULL) ;
	printf("main thread info %lu\n", pthread_self());
        struct sigaction act;  

        union sigval mysigval;

        int i;

        int sig;

        pid_t pid;         

        char data[10];

        memset(data,0,sizeof(data));

        for(i=0;i < 5;i++)

                data[i]='2';

        mysigval.sival_ptr=data;

       

//        sig=atoi(argv[1]);

        pid=getpid();

       

        sigemptyset(&act.sa_mask);

        act.sa_sigaction=new_op;//三参数信号处理函数

        act.sa_flags=SA_SIGINFO;//信息传递开关，允许传说参数信息给new_op
		for (int i = 1; i < 28; i++)
		{

				if(sigaction(i,&act,NULL) < 0)

				{

						printf("install sigal error\n");

				}
		}

        while(1)

        {

                sleep(2);

                printf("wait for the signal\n");

                sigqueue(pid,sig,mysigval);//向本进程发送信号，并传递附加信息

        }

}

void new_op(int signum,siginfo_t *info,void *myact)//三参数信号处理函数的实现

{
	printf("pthread info %lu\n", pthread_self() ) ;

        int i;

        for(i=0;i<10;i++)

        {

                printf("%c\n ",(*( (char*)((*info).si_ptr)+i)));

        }

        printf("handle signal %d over;",signum);

}