fork function

One, process identificationEach process has a unique process ID that is represented by a nonnegative integer. Although the ID is unique, the process ID is reusable. When a process terminates, its process ID becomes a candidate for reuse.There are

First, the Linux classificationTypical branches of redhat such as: Redhat, CentOS, Fedora,mandrake,mandriva, domestic red X, etc.Debian branches such as: Debian,ubuntu, etc.Slackware branches such as SUSE, etc.Yum can be used to operate RPM packages,

Guardian Process OverviewThe daemon, which is commonly referred to as the daemon process, is a background service process in Linux.It is a long-lived process, usually independent of the control terminal and periodically performs some sort of task or

20135311 Fu DongAnalyzing the process of creating a new process in the Linux kernel learning contentProcess Control block--PCB TASK_STRUCT data structureThe PCB task_struct contains:进程状态、进程打开的文件、进程优先级信息操作系统管理的三个功能：1.进程管理 2.内存管理 3.文件系统Status of the

Http://www.cnblogs.com/leoo2sk/archive/2009/12/11/talk-about-fork-in-linux.htmlHttp://www.cnblogs.com/jimwind/archive/2012/12/26/2834147.htmlHttp://www.cnblogs.com/hicjiajia/archive/2011/01/20/1940154.htmlLinux the next process in memory has three

Analyzing the process of creating a new process for the Linux kernelGrasping Writer: Li Pengju No.: 20132201(* Original works reproduced please specify the source *)(Study course: "Linux kernel Analysis" MOOC course

Experimental Purpose:Familiar with the application of process creation functions in Linux.Experimental content:Program 1: Complete the creation of the child process with the fork () function. Output of word in parent process, child

[Go] DaemonHttp://www.cnblogs.com/coder2012/p/3168646.htmlThe daemon, which is usually called the daemon process, is the background service process in Linux. It is a long-lived process, usually independent of the control terminal and periodically

Before the implementation of the file IO to achieve a copy of the file, then for the process, we can also implement it?The answer is yes.Process resources:first, let's review what resources are needed to run the process.   Its resources include CPU

User buffers: child processes created by the fork function inherit the user buffer of the parent process. If there is still data in the buffer before the parent process calls the fork function to create the child process, the child process will copy

This article mainly refer to from: Linux system Programming process (eight): Daemon process detailed and create, daemon () use I. Overview Daemon (daemon) is a special process running in the background. It is independent of the control terminal

First, process creation steps and introduction to creating functions 1. Create a new process using the fork () or vfork () function 2. Use the EXEC function family to modify the process created. The process created using fork () is a full copy of

In Linux, there is a special function fork (). This function returns the process number PID of the subprocess to the parent process, and returns 0 to the child process. Have you ever wondered how a function might have two different return values? In

Forkthe fork () function is a system call under Linux that produces a child process that is a copy of the current process and has the same virtual content as the parent process, but there are some differences.However, it is noteworthy that after the

Process in real lifeIn many scenes, things are done at the same time, for example, when you drive a car with your hands and feet together, you can sing and dance at the same time.Here is a video of Michael

For Windows, the concepts of processes and threads are clearly defined, and the concept of a process corresponds to a running instance of a program (instance), while a thread is the smallest unit of execution of a program's code. This means that

This article describes the Python implementation of Linux under the protection process of writing methods, share for everyone to reference, I believe that the Python program design for everyone will play a role in helping. Here's how: 1. Call fork (

Daemon Xinted and Syslogd 1. Create a daemon 1. Make the init process the parent process of the newly generated process. After the fork function is called to create a sub-process, the parent process immediately exits. In this way, the child process

This article analyzes Linux kernel porting-hyper-threading-general Linux technology-Linux programming and kernel information. The following is a detailed description. Application 2.6 kernel hyper-threading Mode For most application software

Multi-process programming in Linux-general Linux technology-Linux programming and kernel information. For details, see the following. Abstr: The concept of multi-threaded programming was proposed as early as 1960s, but it was not until the middle of