/*********************************************************************************
 *      Copyright:  (C) 2025 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  waitpid.c
 *    Description:  This file waitpid() example program.
 *
 *        Version:  1.0.0(10/28/2025)
 *         Author:  Guo Wenxue <guowenxue@gmail.com>
 *      ChangeLog:  1, Release initial version on "10/28/2025 10:02:15 AM"
 *
 ********************************************************************************/

#include <stdio.h>
#include <sys/wait.h>
#include <unistd.h>

int main(void)
{
    pid_t pid, ret;
    int status;

    pid = fork();

    if (pid == 0)
    {
        printf("Child process running\n");
        _exit(3);
    }
    else
    {
        ret = waitpid(pid, &status, 0);
        if (ret > 0)
        {
            if (WIFEXITED(status))
                printf("Child exited normally, status = %d\n", WEXITSTATUS(status));
        }
    }
    return 0;
}