linux fork两次避免僵尸进程的程序（简单）

#include<stdio.h>
#include<unistd.h>

int main()
{
    pid_t pid,pid1;
    int status;

    if( (pid = fork())<)
    {
        printf("fork error\n");
        return -;
    }
    else if( pid == )
    {
        printf("%d,%d\n",getpid(),getppid());
        if( (pid1 = fork())<)
        {
            printf("fork error\n");
            return -;
        }
        else if(pid1 == )
        {
            printf("%d,%d\n",getpid(),getppid());
            system("ps -ef|grep dlsc30");
            return ;
        }
        exit();
    }
    wait(&status);
    printf("%d,%d\n",getpid(),getppid());
    while()
    {
        printf("i will not break\n");
        sleep();
    }
    exit();
}