game zombie

Basic concepts: In Unix/Linux, a child process is created by a parent process and a new process is created by a child process. The end of the Child process and the running of the parent process are asynchronous processes, that is, the parent process can never predict when the child process ends. After a process terminates its work, its parent process needs to call wait () or waitpid () to obtain the termination status of the child process. Orphan process: if a parent process exits and one or mor

The eye of death seventh customs clearance steps are also more, there are 35 steps, time in 120 seconds. Because the customs clearance procedures are more complex, small series with the figure to show you the path, directly to the map position, the next step when the zombie will move, so this road is safe, we do not worry. Starting position Avoid the first zombie path The

Zombie Process: The child process terminated, but the parent process did not reclaim the resource PCB for the child process. Make it a zombie processOrphan process: The parent process ends with the child process, which causes the child process to lose the parent process, and this time the subprocess is adopted by the 1th process init process as an orphan processTo prevent the above two cases, we should be s

1. What is a zombie process?A zombie process is a child process that ends before the parent process, but the parent process does not reclaim the child process and frees the resources that the child process occupies. The zombie process also occupies a slot in the process table, but the process table has limited capacity, and the defunct process not only consumes s

ObjectiveIf the parent process does not end, and the child process terminates. The child process will always be a zombie process until the parent process calls the wait function to reclaim the child process or the parent process terminates.This article will provide two ways to deal with this problem.Method One: Parent process recovery methodThe wait function blocks its callers until one of its child processes terminates. Therefore, the parent process

Zombie Network is listed as one of the top ten computer viruses, Microsoft This July has a reward for 250,000 of dollars to capture zombie network operators, it can be seen how abhorrent. Recently, there is news that the Kaspersky Lab teamed up with Microsoft, Kyrus Tech, successfully annihilated the infamous Kelihos botnet, and also hit the back of the zombie ne

When a process calls the Exit command to end its own life, it is not actually destroyed, but it leaves behind a data structure that becomes zombie. The zombie process is a very special kind of because it has given up almost all of the memory space, no executable code, can not be scheduled, only in the process list to keep a position, log the process of the exit status and other information for other process

For multi-process concurrent programming with PHP, it is unavoidable to encounter the problem of zombie process.The zombie process refers to the parent process that has exited,And the process dead after the process is not accepted,It becomes the zombie process (zombie) process. Any process that exits before exiting (us

Reprint: http://blog.csdn.net/shanzhizi/article/details/47320595On linux servers, there are some zombie processes , and here's how to quickly find and destroy these zombie processesFirst, we can use the top command to see if the server currently has a zombie process, in which you can see the number of zombie process hi

For multi-process concurrent programming with PHP, it is unavoidable to encounter the problem of zombie process.A zombie process is a zombie process (zombie) process in which a parent process has exited, and the process dead after it has not been accepted by the process. Any process that exits before exiting (using exi

the background of waitWhen the child process exits, the kernel sends a SIGCHLD signal to the parent process, and the exit of the child process is an asynchronous event (the child process can terminate at any time the parent process runs)When a child process exits, the kernel resets the subprocess to zombie state, a process called a zombie process that retains only the smallest number of kernel data structur

Recently, wrote a pcap aspect of the program, when the program started, there is a daemon monitoring, will restart;The program itself will be multi-threaded monitoring of all active network cards, while using two threads, one to do time-out check, a connection status display;Today in the replacement, found that there is a zombie process this situation occurs, because the internal use of a lot of sleep, maybe you kill the main thread, the child thread

Orphan process: The process of a child process being adopted by the INIT process as a result of the parent process exiting is the orphan process, which is the parent of the orphan process being changed to the INIT process, which reclaims its kernel space resources after the orphan process exits. Zombie Process: The process has exited, but its father process has not yet reclaimed the kernel resources of the process as a

.*/ Result: Current process ID: 1995A = 8PID = 1, 1996Ppid = 1995AA = 9Child pid = 1996Parent pid = 1995 Generation of zombie processes: /*========================================================== ==========================================Name: jianshiprocess. cAuthor:Version:Copyright: Your copyright noticeDescription: Hello world in C, ANSI-style========================================================== ==========================================*

In the Wikipedia explanation:In the operating system realm, the orphan process refers to a class of processes that continue to run after the parent process finishes or is terminated.In a Unix-like system, a zombie process is the completion of execution (via the exit system call, or a fatal error at run time or a termination signal), but there is still one table entry in the operating system's process table ( process control block PCB), The process of

TCP/IP network programming (transcription note 3) – Zombie process and multitasking concurrent server table of Contents The production of zombie processes Avoid zombie processes Signal Multi-tasking Concurrent server The production of zombie processes Child process exits first, parent

TCP/IP network programming (transcription note 3) – Zombie process and multitasking concurrent server table of Contents The production of zombie processes Avoid zombie processes Signal Multi-tasking Concurrent server The production of zombie processes Child process exits first, parent

#-c Specify the number of packages,--spoof Forge ip,src,-p Specify Port Dsthping 192.168.1.1 (eth0 192.168.1.1): S set, headers + 0 data bytes---192.168.1.1 hping statistic---packets tr ansmitted, 0 packets received, 100% packet Lossround-trip Min/avg/max = 0.0/0.0/0.0 ms Zombie Scan Extreme concealment, the implementation of harsh conditions, principle: can achieve address f

Start working on the IRC botnet this week, first to understand its principles and processes.(1) Infection: Zombie hosts download bot.py and attack programs from the Hanging Horse website(2) Registration: Bot.py automatically runs on the zombie host to connect to the server(3) View bot list: The controller connects to the server to see if those machines have been infected.(4) Send Attack command: The control

is the main process at sleep (10), which achieves our goal.2. Here is the main discussion of the use of the waitpid hereFunction: Reclaim the sub-process generated by the 1th Fork, where the code shows that the child process is generated immediately after calling exit.3. Doubts: the fork function after the parent-child process sequence of execution, Waitpid always successful recovery?To do 2 experiments here,The first time the code in line 20th sleep (3), uncomment, run, observe the results. (A