创建自己的僵尸进程

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

int main()
{
    pid_t pid;
    pid = fork();
    if(pid < 0)
        printf("error occurred!\n");
    else
    {
        if(pid == 0)/*child 进程*/
        {
            exit(0);
        }
        else
        {
            sleep(30);/*父进程pause*/
        }
    }
    wait(NULL);/*收集僵尸进程*/

    return 0;
}
ps -aux
lgy       3016  0.0  0.0      0     0 pts/0    Z+   19:27   0:00 [a.o] <defunct>