/*************************************************************************

	> File Name: sigquque.c

	> Author:

	> Mail:

	> Created Time: 2015年11月21日 星期六 14时33分25秒

 ************************************************************************/

#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <signal.h>

#include <sys/types.h>

#include <sys/wait.h>

//用新的回到函数接受数据。。。。

void myHandle_forsigaction(int signum, siginfo_t *s_t, void *p)

{

	printf("parent recv a sig=%d data=%d data=%d\n", signum, s_t->si_value.sival_int, s_t->si_int);

}

int main(int argc, char *argv[])

{

	pid_t 	pid;

	int ret = 0;

	struct sigaction act;

	act.sa_sigaction = myHandle_forsigaction;

	sigemptyset(&act.sa_mask);

	//如果父进程的回调函数， 准备接受额外数据

	act.sa_flags = SA_SIGINFO;

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

	    perror("sigaction error\n");

	pid = fork();

	if (pid == -1)

	{

		printf("fork err...\n");

		return 0;

	}

	if (pid == 0)

	{

		int i = 0;

		/*

         union sigval {

             int   sival_int;

             void *sival_ptr;

         }; */

	   union sigval  mysigval;

	   //mysigval.sival_ptr = (void *)&t;

	   mysigval.sival_int = 222;	

		//kill(getppid(), SIGINT);

		//带额外数据

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

		{

			ret  = sigqueue(getppid(), SIGINT, mysigval);

			if (ret != 0)

			{

				printf("sigqueue .....\n");

				exit(0);

			}

			else

			{

				printf("child send the SIGINT signal by the funtion sigqueue...%d\n", i+1);

				sleep(1);

			}

		}

        exit(10);

	}

	else if (pid > 0)

	{

        int status;

        int time = 20;

        while(time){

            time = sleep(time);

        }

        wait(&status);

        if(WIFEXITED(status)){

            printf("the child exit code is %d\n", WEXITSTATUS(status));

        }

	}

    exit(0);

}