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  I forgot a very simple C code from where I found it a long time ago, completed the character device registration, automatically obtained the device number (Master/Slave), and automatically created the device node. I have posted some similar

1. Fork Process Creation Code: #include #include #include #include #include #include #include #include #include int main(int argc, char *argv[]){ pid_t child; //create child process if((child = fork()) == -1) { printf("Fork Error: %

I recently studied qq2440 and want to perform pose detection for underwater robots. It is very troublesome to use Linux to program device drivers, it is good to find an example on the Internet. copy it for backup. On PC: OBJ-M: = Hello. o

Static compilation, dynamic loadingThe application wants to access the kernel through a system callDriven:1. Module (package, add kernel)2. Kernel mechanism3. Operating HardwareWhen configuring Menuconfig in Kconfig, different types will display the

Code for writing kernel driver modulesThe required header files typically involved in the driver module:Specification of the entry function for the drive module:int __init entry_name (void){/*xxx*/return 0;}Module_init (Entry_name);Specification for

1. TCP Program Design Code 1 server: #include #include #include #include #include #include #include #include #define portnumber 3333 int main(int argc, char *argv[]){ int sockfd, new_fd; struct sockaddr_in server_addr; struct sockaddr_in

The kernel module is an external plug-in provided by the Linux kernel. It is called the dynamic loadable kernel module (lkm. The Linux Kernel provides a module mechanism because it is a single kernel ). The biggest advantage of a single kernel is

DriverProgramHello. c ################################## # Include # Include Module_license ("dual BSD/GPL "); Static int hello_init (void){Printk (kern_alert "Hello, world \ n ");Return 0;} Static void hello_exit (void){Printk (kern_alert

Because the articles and experiments written in the Ubuntu environment do not have a tool that is easy to use in Linux, so there is not much screenshots, but hope haihan, but the descriptions are all in place.   I have been developing applications

1. File Creation Code: #include #include #include #include #include #include void create_file(char *filename){ //create a file if(creat(filename, 0666) Makefile: CC = gcc CURTDIR = $(shell pwd)TARGET = file_create %.o:%.c$(CC) -c

1. Thread Creation Code: #include #include #include #include #include #include #include #include #include #include struct member{ int a; char *s;}; void *create(void *arg){ struct member *temp; temp = (struct member *)arg;

Introduction APPRTC is what, webrtc.org official Experience App Ingredients: ubuntu14.04, other Linux versions are not limited, the official does not specify Chrome M51+stunnle Https://www.stunnel.org/ind Ex.htmlrfc5766-turn-server

Write the makefile file directly (assuming the file to be compiled is HELLO.C)1 Ifneq ($ (kernelrelease),)2 Obj-m: = hello.o3 Else4 Obj-m: = hello.o5 Kerneldir =/lib/modules/$ (Shell uname-r)/build6 pwd: = $ (Shell PWD)78 Default:9 $ (make)-C $

Input: Apt-cache Search Linux-source//view kernel version Input: Apt-get install linux-source-3.0.0//get the corresponding version of the kernel, by default installed in the/USR/SRC directory See: How to build the kernel source tree

The kernel module is a socket provided externally by the Linux kernel, which is known as the dynamic loadable kernel module (Loadable Kernel module,lkm), and is referred to as a module . The Linux kernel provides a modular mechanism because it

Reprint Annotated Source: http://blog.csdn.net/xhz1234/article/details/44278137 Copyright Xu Hongzhi (Macrosan). All rights reserved.A call relationship between modules is common, with two modules A, b,b using the function provided by the A module

++ The third part is the project organization of makefile. ++ Preface:If Library 1 depends on library 2 and the user only uses lib1, I haven't seen it yet. How can I avoid using-l library 2. That is to say, at the same time as-l database 1,-l

Generally, you can use a general makefile when writing the kernel driver, saving you from the trouble of writing your own. The following is a file I used: ifneq ($ (kernelrelease ),) # Call from kernel build system Module-objs: = Hello. o OBJ-M: =

The entire process of making the hello. Ko kernel module in Linux 1. Linux system is used redflag 6.0 SP1: ftp://ftp.redflag-linux.com/pub/redflag/dt6sp1/SP1/redflag-6-sp1.iso, the system installation is very easy, the installation prompt is

 I. experiment environment Development machine environment Operating System: Ubuntu 9.10 Cross-compiling environment: Arm-Linux-GCC 4.2.2, installation location/usr/local/ARM/4.3.2/ 6410 board kernel source code