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Linux obtains IP and NIC information for the machineThe code comes from the network, I rewrite, have the United States dare not self-specialized, special share. The usage is simple, just 3 functions.Header file Getmac.h:/** * getmac.h * * 2014-07-08:

Message Queuing is a way to communicate between processes, at first I thought that Message Queuing was like a pipe that connected one process to another, and that only two processes could read and write to each other. In fact, this is wrong, Message

An ID value must be specified for the system to establish IPC communication (such as message queue and shared memory. Generally, this ID value is obtained through the ftok function. The ftok prototype is as follows: Key_t ftok (char * fname, int ID)

Introduction to Linux programming-Message Management-Linux general technology-Linux programming and kernel information. For details, see the following. Process Communication (IPC) in Linux) Process Communication (IPC) in Linux) POSIX unknown

Learn the excellent source code-orisun-blog Learning excellent source code Determine whether the image is used based on the suffix of the file name. ? 123456789101112131415 Char * Pic_list [] = { "Jpg" , "BMP" , "

Using Write\send to send datagrams Eagain:resource temporarily unavailable error under LinuxFirst of all, I set the socket to asynchronous, and then when I use write to send data, the way is to loop a large amount of data, because it is asynchronous,

As we all know, with the increase of the number of hosts on the Internet, the existing 32-bit IP address is not enough, so the introduction of the next generation of IP address IPv6, write network program to slightly change the existing network

In order to allow the custom error and exception handling mechanism to capture fatal errors, the thinkphp () method adds Trigger_error ($e [' message ') to the fatalerror () approach; // 重新设置错误及异常处理机制

Header file # include Defines the int flock (int fd, int operation) function ); Function Description: Flock () performs various locking or unlocking actions on the file referred to by the parameter FD according to the method specified by the

Memory Allocation Structure: # Ifndef hdb_h_defined# Define hdb_h_defined # Ifndef _ gnu_source# DEFINE _ gnu_source# Endif # Include # Include # Include # Include # Include # Include # Include Typedef uint64_t hdb_handle_t; /** Formatting for

Exception Handling in Ruby Ruby predefines common exception types, as shown in: All Exception classes are derived from the base class Exception, which is similar to Java, C #, and Python. Ruby special point-when an exception occurs, ruby will put

An ID value must be specified when the system establishes an IPC communication (such as Message Queuing, shared memory). Typically, this ID value is obtained through the Ftok function.The Ftok prototype is as follows:key_t Ftok (char * fname, int id)

Development test Environment: virtual machine centos,windows Network debugging assistantNon-blocking mode has 3 uses1. Three-time handshake to do other processing at the same time. Connect takes a round trip time, from a few milliseconds of LAN to a

The system must specify an ID value when it establishes an IPC communication, such as Message Queuing, shared memory. Typically, the ID value is obtained through the Ftok function. The Ftok prototype is as follows: key_t Ftok (char * fname, int id)

Directory (1) using Yum to install the related software package, always prompts the following error: Repodata/repomd.xml: [Errno 4] IOError: ,error:cannot retrieve Repository metadata (Repomd.xml) for repository:base. Please verify its path and try

Linux Socket programming We are well versed in the value of information exchange, so how can we communicate between processes on the network, such as how the browser processes communicate with the web server when we open a browser to browse the web

Reentrant: Lfl @ Ubuntu:/usr/include $ VI errno. h Focus on the content in the file /* Declare the 'errno' variable, unless it's defined as a macro Bits/errno. H. This is the case in GNU, where it is a per-Thread Variable. This redeclaration using

File Header name: (errno.h)File Header Description:The following macro is defined in the file errno The last error code 　Plus at least three other macro constants: EDOM , ERANGE andEILSEQ 宏定义　　　　　　　　　　　　　　　　　　　　

Socket programming practices in Linux (5) solutions for setting socket I/O timeout (1) Use the alarm function to set timeout   #include unsigned int alarm(unsigned int seconds);   Its main function is to set a signal transmission alarm.

The earliest IPC form on UNIX systems is pipeline, and pipeline creation uses the pipe function: #include int pipe (int pipefd[2]); The function creates a one-way pipeline that returns two descriptors pipefd[0], and