argc 2

Basic concepts of interprocess communicationinterprocess communication means that data can be exchanged between two different processes, but from the previous chapter we know that different processes are independent of each other, so to achieve

Operating system Ubuntu 14.04 LTS[OPENCV Version] 3.0.0-beta[Eclipse Version] 3.8.1Knowledge Required: Linux System shell Command basics Compilation fundamentals, Precompiled--compilation---Links Make, CMake knowledge IDE Usage

Inter-Program Collaboration mode-shell outShell out this noun although not how to hear, but perhaps in silent use, plainly is through a program through the form of a command to invoke another program, that is, System (2) systems call. The existence

Ten years did not write C, this can be said to re-learn, the bottom of the program is to change from W.richard Stevens's masterpiece-Networking apis:sockets and XTI, for two reasons: (1) In my development environment scientific LI Nux 7.0 on the

/** * CVE-2014-4014 Linux Kernel Local Privilege Escalation PoC * * Vitaly Nikolenko * http://hashcrack.org * * Usage: ./poc [file_path] *  * where file_path is the file on which you want to set the sgid bit */#define _GNU_SOURCE#include #include

IdeasThe main thread is responsible for sending messages, and the other thread is responsible for receiving messages. This is true for both the server and the client.AttentionThe port will not be shut down immediately after a party closes the socket

Ubuntu under errno valuewhenever an error occurs in a UNIX function (such as the socket function), the global variable errno is set to a positive integer that indicates the type of error, and if the function does not return an error, the value of

Objective:In the recent development process, there is a need to format the XML to convert from one format to another. Therefore, it is necessary to read the XML for processing. Originally intended to be written as a tool to run under Linux, but

This paper gives a very useful small example of TCP communication between the server and the client. Concrete implementation is very simple, but usually write a similar program, the specific steps are often forgotten, but also always check, for the

Linux Hybrid character deviceHybrid Device Driver ModelHybrid Equipment ConceptIn a Linux system, there are a class of character devices, which have the same main device number (10), but the second device number is different, we call this device a

Advanced Programming in the UNIX Environment (third edition) is a well-known programming book for Unix systems.However, the code example in the book, in order to correctly compile the run, you need to prepare the work:1. Download the source

Linux acquires network interface information needed for the function of the IOCTL (), struct struct ifreq,struct ifconf1.ioctl () function prototypes and functions1 #include 2 3int ioctl (intint Request, ...); 4 5 // Parameters 6 // int D: is a

#!/bin/SH# Usage:./resetusb ARGUMENT (the keyword for your USB device)Var1=$1keyword=${var1:=Storage}debug=$ (LSUSB) bus=$ (lsusb|grep$keyword |Perl-ne"/\d+ (\d+) \d+ (\d+) +/; print QQ (\$1)") Device=$ (lsusb|grep$keyword |Perl-ne"/\d+ (\d+) \d+

1Linux Process OverviewThe process is that once the program runs, he and the program are essentially different. The program is static, and he is instructed to collect instructions stored on disk. The process is a dynamic concept. He is the executor

Recently saw the shell script. The shell script has been used many times in a lot of ready-made kits. In short, the effect of this thing is to integrate a series of operations.• Integration makes a set of work more modular and standardized.• Batch

Theoretical basis Stream: Call fopen Open file after file read and write operation will create a stream, socket network communication will also create a flow, the flow is a data transmission for the purpose of a bridge, in fact, refers to

2015.3.2There are three different processes and procedures:1, there are different locations, programs: Hard disk, disk. Process: Memory2. The program is static and the process is dynamicExecute the./a.out-->bash->bash Program Call Fork ()--and the

This article is about the difference and connection between wait and Waitpid. To avoid the creation of a zombie process, whenever we create a subprocess, the master process waits for the child process to return to clean up the subprocess.  To do

DUP, DUP2,FCNTL,IOCTL system call1 1 . DUP, dup2 function 2 int dup (int OLDFD)3int dup (intint newfd)The file descriptor used by DUP to copy the parameter OLDFDDuo2 can use NEWFD to specify the value of the new file descriptor2.fcntl

One, POSIX signal volumeThe 1.Posix semaphore is divided into two types:1. Known semaphores: Using POSIX IPC name identifiers (known semaphores are always available for synchronization between threads and for inter-process synchronization)2. Memory