Linux

System Call System calls are provided to users by the operating system.ProgramA group of special interfaces called. The user program can use this special interface to obtain the services provided by the operating system kernel. 1. Linux

1) Create an NFS share operation: 0. You have logged on to the system as the root user. 1. By default, the system does not start the NFS service.Service NFS statusService NFS start 2. Modify the NFS configuration file/etc/exports, for example#

Original Definition: Include/Linux/init. hquote: # DEFINE _ init _ attribute _ (_ Section _ (". init. Text "))) # DEFINE _ initdata _ attribute _ (_ Section _ (". init. Data "))) # DEFINE _ exitdata _ attribute _ (_ Section _ (". Exit. Data "))

  Timer is a very important resource. in Linux, timer4 is used as a conventional timer. We can find the timer interrupt by viewing the interrupt Resource: [Root @ zhaocj/] # Cat/proc/interrupts ...... 30: 20118 s3c S3C2410 timer tick ......

I. Build a QT Project 2. Draw a display window 3. Add a program (because the v4l2 program is too long to be posted, please download it to the resource) 1. Working thread code video_thread::video_thread():QThread(){ quit_flag =

I. Overview: 1. in Linux, there is a philosophical saying "all files under Linux ". The device driver shields the application from hardware details. In this way, the hardware device is only a device file, and the application can operate the hardware

Linux interrupt implementation method (I): Establishment of Interrupt registration method and abnormal vector table I have read some articles about Linux interrupt implementation on the internet, and I feel that some of them are very well written.

Attribute category --------------------------------------------- The second parameter of the pthread_create function is about thread attribute settings. Attributes include bonding attributes, separation attributes, stack address, stack size, and

Bluez version: 2.25 ARM Linux: 2.6.17.8 The focus of bluez is on configuration. Here we mainly talk about the use of RFCOMM, that is, the use of Bluetooth analog serial ports. ## HCI daemon configuration file.## HCId optionsoptions { #

# Include # Include # Include # Include int main (INT argc, char ** argv) { /* First disable all our signals */ Sigset_t set; Sigfillset (& set ); Sigprocmask (sig_block, & set, null);/* send signals to all processes _ sort T _ PID 1 */ Printf ("

Dynamically open the memory in the device driver, instead of using malloc, but kmalloc, or directly apply for a page using get_free_pages. Kfree or free_pages are used to release the memory. Linux provides a complex Storage Management System for

  Linux memory linear address space is 4 GB, divided into two parts: user space (usually 3 GB) and kernel space (usually 1 GB ). Here we mainly focus on the kernel address space. The kernel manages all the physical memory through the global

Create a proc fileBased on the use of Proc files, the kernel provides a variety of packaging functions to create a proc file. Method 1:Struct proc_dir_entry * create_proc_entry (const char * Name, mode_t mode, struct proc_dir_entry * parent)This is

Topic: program structure of the Linux kernel module-module load function (required), module unload function (required), module license statement (required), module parameter (optional ), module export symbol (optional), module author's and other

struct sockaddr_in { sa_family_t sin_family; /* address family: AF_INET */ u_int16_t sin_port; /* port in network byte order */ struct in_addr sin_addr; /* internet address */};struct in_addr { u_int32_t s_addr; /* address in network byte

Kernel CompilationThis article tells you how to compile the kernel on the arm machine on the target platform.Here are some instructions to help you understand the related terms and conventions in this article:* "Bash $" and "bash #" are shell

Kernel version:Linux xok 2.6.18-128.1.6.el5.centos.plus #1 SMP Thu APR 2 12:53:36 EDT 2009 i686 i686 i386 GNU/Linux Test now: Note that the test may cause a crash. Do not test in the production environment. If you want to verify the vulnerability by

Linux UID and GID Each file has an owner, indicating who created the file. At the same time, the file also has a group number, indicating the group to which the file belongs, generally the group to which the file owner

This is the first article in the Linux System Call series. It introduces the definition, basic principles, usage methods, and precautions of Linux system calls, this gives readers a general impression of Linux system calls. What is system call?

/* Function, Linux read/write lock blog, http://blog.csdn.net/shunqiziranhao007/article/details/8700288date, April 1, March 21, 2013, including # include # include // only one thread can lock the mutex. Therefore, the concurrency is not high.