Linux模拟僵尸进程并kill

模拟系统有僵尸进程后怎么解决

僵尸进程

#include <stdio.h>
#include <sys/types.h>

int main()
{
    //fork a child process
    pid_t pid = fork();

    if (pid > 0)   //parent process
    {
        printf("in parent process, sleep for one miniute...zZ...
");
        sleep(60);
        printf("after sleeping, and exit!
");
    }
    else if (pid == 0)  
    {
        //child process exit, and to be a zombie process
        printf("in child process, and exit!
");
        exit(0);
    }

    return 0;
}

首先top

zombie代表僵尸进程

演示

创建一个zombie.c, 把最前面的C复制下来

编译
gcc zombie.c -o zombie

会在本地当前目录生成一个zombie的可执行文件

运行它

此时再看top

查询僵尸进程

ps -A -ostat,ppid,pid,cmd |grep -e '^[Zz]'

kill

kill -HUP 3073