litespeed fork

1, Pid_t PID; Int listenfd, connfd; Listenfd = socket (...); BIND (...);Listen (...); While (1){Connfd = accept (....);If (pid = fork () = 0){// Why Should listenfd be disabled for the derived self-process? If it is disabled, the parent process cannot be reused.Close (listenfd );Doit (connfd );Close (connfd ); Exit (0) }Close (connfd );} 2, If fork is executed repeatedly, will the code abov

Fork creates a new process. The newly created process is a sub-process. It is a copy of the code of the parent process and is usually used on the server where multiple processes are processed, you can also run independent code in a sub-process.You can use getpid to determine whether the current process is a child process or a parent process. Let's look at the example below: # Include # Include # Include Int main (){Pid_t PID;Static int n = 0;Printf (

Friends who have written fork () functions should have experience. Generally, after using the fork () function, the subprocess is always executed first when printing the execution sequence. But the book says that the execution sequence between the sub-process of the fork function and the parent process is uncertain. Why? This involves a kernel technology: Copy-o

Preface? If you do not know what zygote is, or how curious zygote to start, you can go to see the old Luo article:Source code Analysis for Android process zygote startup processAll Android application processes are zygote fork, the new fork out of the application process also maintains the root authority, which is obviously not allowed, so the fork out of the chi

About fork () in Linux:Parent/child processes created by fork () share the same file table (Linux file descriptor or called ' Open file Descriptor ' )Which code would the new process execute?Acutally they share the same code, the different is the return value of fork ();For a child process, fork () returns zero, but fo

A process with ID 0 is typically a scheduling process. is often referred to as the Swap process (swapper), which is a system process in the kernel.A process with ID 1, called the init process, is a normal user process that is not part of the kernel and is called by the kernel.An existing process can call the fork function to create a new process (child process). The fork function is called once. Returned tw

I. Related concepts of trees 1. Basic concept SubtreeA subtree is composed of a node and its descendants.The degree of the nodeThe number of subtrees owned by the node.The degree of the treeThe maximum number of nodes in a treeThe depth of the nodeThe depth of the node equals the number of ancestor nodesHeight of the treeThe height of the tree is equal to the maximum value of all node depthsForestA collection of trees that do not intersect in several classes. Any tree, deleting the root node bec

Two fork Tree: Use the widest range, and the most regular to follow, easy to maintain and handle Using a two-fork list to represent the storage structure of a binary tree typedef struct BITNODE { elemtype data; Store node Data struct Bitnode *lchild,*rchild;//Pointer to left child and right child node }bitnode,*bitree; Traversal of binary tree:Starting from the root node, ac

K-Fork Huffman Tree THINK What is Huffman tree. Huffman Tree is a two-fork tree with a weighted path length of the smallest. The K-Fork Huffman Tree is the smallest K-fork tree with weighted path length. Huffman tree is also an optimal decision tree in the context of the need for conditional judgment. What is the u

#include A new process created by Fork is called a subprocess (child process). The function is called once, but returns two times. The difference of two returns is that the return value of the child process is 0, and the return value of the parent process is the process ID of the new process (child process). The reason for returning the child process ID to the parent process is that because there are more than one child process in a process, there is

/master * * The above steps are already able to fork others in the project synchronized update;But the actual situation is often fork other's project, you will also modify the project, of course, the original author will also modify his own project, at this time the synchronization method is as follows: * process : Fork source warehouse-①

Main (){Pid_t PID;If (pid = fork () {Printf ("error! ");}Else{If (pid = 0)Printf ("A/N ");ElsePrintf ("B/N ");}}Returns a, B, or B,.Because the fork call will execute two returned results respectively from the child process and the parent processBecause the parent process has nothing to do with the child process, both the parent process and the child process may first returnReading a programMain (){Pid_t a_

Recently in the reading of Linux programming, and then also online access to the relevant information found a fork () a few questions, here to record!#include "Sys/types.h"#include "Unistd.h"#include pit_t fork (void);The fork () function call succeeds and returns two values;Parent process: Returns the PID of the child process;Child process: returns 0;Error: retu

The last time, the content of the nonlinear logical data structure tree is opened, and the deep review and summary of the two-fork tree is started. First, let's review a few important concepts:First, review1. Full two fork tree with complete binary treeA two-prong tree means that all nodes except the leaf node have two child nodes. This makes it easy to calculate the depth of a two-

A new process created by Fork is called a subprocess (child process). The fork function was invoked once, but returned two times. The return value of the child process is 0, and the return value of the parent process is the process ID of the new process. The reason for returning the child process ID to the parent process is that because a process can have more than one child process, and there is not a sing

The definition of a tree Tree-shaped structure is a kind of important nonlinear structure. A tree structure is a structure with a branch and a hierarchical relationship between nodes. It is very similar to the tree in nature.Recursive definition of tree:A tree is a finite set of n (n≥0) nodes t,t is called an empty tree, otherwise it satisfies the following two conditions:(1) Having and having only a specific node called root (Roots);(2) The remaining nodes can be divided into m (m≥0) disjoint

Article reference: HTTP://WWW.JIANSHU.COM/P/9FD449340EA5 First confirm the noun:Main Warehouse: Everyone usesFork Library: Fork The main warehouse, you use it alone.Local library: Local working library 1. Workaround 1 First, determine if you have established a remote source for the main repo: Git remote-vIf you can only see your own two sources (fetch and push), then you need to add the source of the main repo: Git remote add upstream URLGit remote-vT

The main contents of the tree Tree structure: A non-linear structure, a hierarchical structure defined by branching relationships. main content: The concept of the tree and the two-fork tree, the nature of two fork tree storage Two cross-tree traverse clue two fork Tree and two

I received a telephone interview from an Internet company a few days ago. The interviewer asked me twice about the role of fork (). I was confused and said I did not know. The knowledge is still too narrow. The following summarizes the functions of the two fork () statements. First, you need to know what a zombie process is, what an orphan process is, and the conditions required for running server processes

Fork () function Create a new process in LinuxUniqueYou can use the fork () function. The fork () function is a very important function in Linux. It is different from the functions we have encountered before, because it looks like two values are returned after one execution, what is the explanation? Don't worry, take a look. Function Description The