fork function

Sometimes we need to start another program (process) in our own program to help us do some work, so how do we start other processes in our own process? There are a number of ways to do this in Linux, and here's a description of the differences

The C language under Linux can use fork () to establish a child process.The fork function returns two values, and returns 0 for the child process; The parent process, which returns the child process ID. So withif (fork () ==0){The code snippet

Linux Process Programming: Introduction to Child process creation and execution functionsThere are three child process creation and execution functions:(1) fork ();(2) exec ();(3) system ();The following are detailed descriptions of each.(1) Fork

1, the concept of the daemon process:A daemon (Daemon) is a special process that runs in the background, independent of the control terminal and periodically performs some sort of task or waits for certain occurrences to be handled. Because in Linux,

Description of the processIn layman's words, a process is a program or code that is being executed. We know that the program itself is a bunch of code, at the beginning of the storage on disk, it is static, lifeless, only when the code of the

Zhang Yu + "Linux kernel analysis" MOOC course http://mooc.study.163.com/course/USTC-1000029000Learning directory:(1) How the computer works http://www.cnblogs.com/20135131zxy/p/5224486.html(2) How the operating system works http://www.cnblogs.com/20

The functions used are mainly to get process ID, create process, process exit, process wait, execute program.Get process Id:getpid (), Getppid ()Create process: fork (), Vfork ()Process exit: Exit ()Process wait: Wait ()Execute program: EXEC (),

Source: CSDN Wang Wensong transferred from Linux commune------------------------------------------------------------------------------------------------Guardian Process OverviewDaemon, also known as the daemon process (somehow, I suddenly remembered

ProcessThe process represents a running instance of a program, which is the smallest unit of allocation of resources, which is particularly official.Process is a very important thing, we run a system running n processes at the same time, these

Linux Process Programming: Introduction to Child process creation and execution functionsThere are three child process creation and execution functions:(1) fork ();(2) exec ();(3) system ();The following are detailed descriptions of each.(1) Fork

Original address: http://blog.csdn.net/songxueyu/article/details/9115393 The fork () function is the foundation of multiple process programming in Linux, providing strong support for Linux as a powerful multi-user operating system. But for many

s under Linux we should try to avoid using system. Now let's look at a simple introduction to the system () function under Linux: #include int system (Const char* command) The system () function calls/bin/sh to execute the specified command of a

Reprint Please specify source:http://blog.csdn.net/allen315410/article/details/42521251Monitoring and unloading scenarios and principle analysis 1, situational analysisIn the previous blog I wrote about the NDK development practice project, the use

Python implements the compiling of the daemon in Linux, and the python daemon The example in this article describes how to compile the daemon process of Python in Linux. It is for your reference and I believe it will be helpful for your Python

1. Introduction We now turn to the process control provided by the UNIX System. This includes the creation for new processes, program execution, and process termination. We also look at the various IDs that is the property of the

By default, if shell is disabled, mongodb stops running. To run it in the background, you only need to add the -- fork function at startup. You can add -- logappend to the Log Path to prevent logs from being deleted. Binmongodb -- fork -- dbpath --

I. Concepts Inter-process communication is to spread or exchange messages between different processes. Pipelines, or anonymous pipelines, are one of the most common communication methods between processes in Linux. They are a channel for data flow

Recently, I took a closer look at the memcached instruction documents and looked at the source code. Sometimes I can skip some obscure C functions. However, it is not a success. Finally, LZ dared to read it again.C LanguageFinally, LZ saw the C

Your understanding is not necessarily correct. It is for reference only. Do not copy it! The same is the same. Lab 1 [Experiment Name]: concurrent program design (experiment 1) [Objective]: to learn how to create a process in a program, observe and

Source: Lupa open-source community Release date:  Network Programming in Linux is divided into two parts: Server programming and client programming. Generally, a daemon process must be created before a server program receives client connection