Linux

[Access System Call]Function Description:Check whether the calling process can perform certain operations on the specified file.Usage:# Include # Include Int access (const char * pathname, int mode );Parameters:Pathname: name of the file to be

Problem: How can more people use Linux? This is not realistic. There are too many Linux versions and too few games. What do you think people buy a PC for? Most people use it to play games. to popularize it in Linux, they must spend time on

Create and disable sqlite3: # Include # Include # Include # Include Int main () { Int RC; Sqlite3 * DB Rc = sqlite3_open ("test. DB", & dB ); If (RC) { Fprintf ("stderr, can't open and create a SQLite dB \ n ");

1. Check that the local machine has all NICs (including disabled NICS) Ifconfig- 2. enable or disable a NIC Ifconfig Nic name up | down 3. Modify the IP address and mask Ifconfig Nic name 192.168.0.87 netmask 255.255.255.0 4.

The key to installing a wireless network card in Linux is whether the driver is correct. Here we will introduce two solutions, namely ndisw rapper or Linux-WLAN-ng. The former virtualizes the Windows API on the Linux platform, and then uses the

Like windows, Linux also has a static/dynamic link library. The following describes how to create and use it: Suppose there are the following files:The header file string. h declares the prototype of the relevant function. The

Summary: Writing device drivers is a challenging and adventurous job. When the device passes the init_mo During dule function registration, device resources should be allocated. A major device resource is the I/O port. As a

In Linux, the file type does not depend on its suffix, but generally speaking:. O is the target file, which is equivalent to the. OBJ file in windows.. So is a shared library and is a shared object, used for dynamic connection, similar to DLL. A is

After reading the Linux code, I feel that the kernel memory protection is not very good, I also feel that some of you do not understand it correctly (the Linux code looks different from the actual one ), so I will talk about the Linux kernel space

1. first introduce the meaning of the bufsiz Keyword: Bufsiz [= 8192]. This value has a statement in row 182 of your stdio. h. 2. Sender Program   snd.c#include#include#include#include#include#include#include#define MAX_TEXT 512struct my_msg_st{

1. Basic Attributes of a process Attributes related to the process are: process ID (PID), parent process ID (ppid), and process group number (pgid). The first process of the system is the INIT process, and its pid = 1 2. Function for retrieving

Each program is essentially linked to one or more databases. For example, a program using the C function is linked to the C Runtime Library, and a GUI program is linked to the window library. In either case, you have to decide whether to link to

In Linux, I usually use the source code compilation method to install Apache. There are two ways to enable Apache to automatically start when the system starts.1. Add the command to start Apache in/etc/rc. d/rc. Local, for

Fdisk-L # check the number of hard disks on the current system. Disk/dev/SDA: 36.4 GB, 36401479680 bytes255 heads, 63 sectors/track, 4425 CylindersUnits = cylinders of 16065*512 = 8225280 bytes Device boot start end blocks ID system/Dev/sda1*1 255 2

We often encounter this problem. We use Telnet/ssh to log on to a remote Linux server and run some time-consuming tasks. As a result, the task fails midway through due to network instability. After the command is submitted, how does one prevent the

1. What is a process? A process is a program in the execution period and a general term for all its resources, including virtual processors, virtual spaces, registers, stacks, and global data segments.   In Linux, each process is assigned a data

What is thread   A Linux thread is a special type of process with its own task_struct. The kernel does not have a special scheduling algorithm or data structure to characterize the thread. Instead, it is just a common process, only process space is

The Mail List discusses how writel is implemented. This function writes data to a register or memory address at the operating system layer with memory protection. In ARCH/alpha/kernel/IO. C 188 void writel(u32 b, volatile void __iomem *addr)189 {190

A rough understanding of request_mem_region in Linux Source: http://gliethttp.cublog.cn In Linux, I/O ing-based I/O port resources and memory ing-based I/O port resources are collectively referred to as "I/O Region" (I/O Region ). I/O Region is

Recently, we have seen the device driver model of Linux. It is not clear about kobject, kset, and so on. When I saw the structure of struct device_driver, I thought of a question: Where can I call its initialization function? Previously engaged in