unix programming book

The book "Advanced Programming in UNIX environments" comes with many small and exquisiteProgramWhen I read this bookCodeI have rewritten it according to my own understanding (most of it is on the copybook) and deepened my understanding (it is too difficult to read a book, haha ). This example is successfully tested on

, exec, and exit on IPC objects 1. Considering unknown synchronization variables (mutex lock, condition variable, read/write lock, POSIX memory-based semaphore), calling fork from a process with multiple threads will become messy. 2. System v ipc is not enabled or disabled in three forms. To access these three forms of IPC objects, you only need to know their identifiers, so any process that knows the identifiers can access them. 6. the IPC example index table in the

Socket Chapter Reading notesHighly recommended Linux/unix system programming manual, known as the God book Beyond Apue.Backlog meaning#include int listen(intint backlog)The backlog parameter limits the number of pending connections (not accept), and within that number,connect will succeed immediately .The upper limit on Linux is 128, defined inUDP is connected to

are are not intended to is replacements for fork and exec, however. They are intended to support systems, have difficulty implementing fork efficiently, especially systems without-hardwa Re support for memory management. vfork Function The function vfork has the same calling sequence and same return values as fork, but the semantics of the two functions di Ffer. The Vfork function originated with 2.9BSD. Some Consider the function a blemish, but all of the platforms covered in this

programmers have realized the benefits of ODBC under the Windows platform, while the database programming under the Linux/unix has to choose the specific API according to different databases to program, once the database has changed, All programs associated with these APIs must be modified. In fact, under the Linux/unix now also have their own ODBC, you can make

machines, it will take a second on programmers. 14. Generation Principle: Avoid manual hack and write programs to generate programs as much as possible. 15. Optimization Principle: you must first have the original type before carving, and learn to go before running. 16. Principles of diversity: never believe in the so-called "no two methods" assertions. 17. Expansion principle: design focuses on the future, and the future is always faster than expected. In addition: A program only does one thi

Odbc|unix| programming Installation, configuration and programming of ODBC under Linux/unix Ziliang (cavendish@eyou.com) July 2002 The main content of this article is to introduce the simple principle of ODBC and how to install, configure and program ODBC under Linux/unix

The book "Advanced Programming in UNIX environments" comes with many small and exquisite programs. When I read this book, rewrite the code in the book according to your own understanding (most of them are on the copybook) to deepen your understanding (it's too difficult to r

The book "Advanced Programming in UNIX environments" comes with many small and exquisite programs. When I read this book, rewrite the code in the book according to your own understanding (most of them are on the copybook) to deepen your understanding (it's too difficult to r

Linux/Unix System Programming Manual Reading Notes Chapter 2 This chapter mainly describes the file I/O buffer. System I/O calls (kernel) and C standard library I/O functions (stdio functions) buffer disk operations. Through buffering, the user space can be separated from the actual physical device to a certain extent, and the number of times the kernel accesses the disk can be reduced. Let's take a look at

UNIX Network Programming-Volume One: Socket Networking APIThe book is intended for those who want to write their own programs that can use the API to communicate with each other as sockets.Directory:1. Introduction2. Transport layer: TCP, UDP, and SCTP3. Introduction to Socket Programming4. Basic TCP Socket Programming5. TCP client/Server program example6. I/O mu

programmingBy knowing more about memory-related knowledge, when programming in peacetime, it should be clearer why we need to follow the rules below. After allocating a chunk of memory, do not change anything outside of this memory range. It is an error to release the same piece of allocated memory more than once. When the same piece of memory is released two times, the common consequence is unpredictable behavior. The free () functi

The book "Advanced Programming in UNIX environments" comes with many small and exquisiteProgramWhen I read this bookCodeI have rewritten it according to my own understanding (most of it is on the copybook) and deepened my understanding (it is too difficult to read a book, haha ). This example is successfully tested on

Unix shell programming (5) The filter TR is used to convert characters from standard input. Format:Tr from-chars to-charsFrom-chars and to-chars are one or more characters. For example:[Root @ localhost programs] # Cat introThe UNIX operating system was pioneered by KenThompson and Dennis Ritchie at Bell LaboratoriesIn the late 1960 s. One of the primary goals i

backup, such as terminals or network devices. When reading and writing a device, you usually do not want to buffer data. For example, writing data to a file representing a network device means you want the data to be sent out through a network device, instead of writing data to the buffer zone, the application will be notified immediately when the network device receives the data, therefore, the unbuffered I/O function is usually directly called for network

protocol family, but rather a method of performing client/server communication on a single host. The UNIX domain provides two types of sockets: a byte-stream socket (similar to TCP) and a datagram socket (similar to UDP). UNIX domain sockets are used for the following reasons: In some systems, UNIX domain sockets communicate faster than TCP sockets that

0 Preface Last week, I was reading the eighth chapter of advanced programming in the Unix environment-process control. In this chapter, I understand the principles of some processes in UNIX. Next I will mainly explain the three most important functions in the process. Let everyone thoroughly understand the process by reading this article. Hope to help you. 1. p

Advanced Programming for UNIX Environments (3rd edition)Advanced programming in the UNIX environmentLinux/unix System Programming ManualLinux/unix System

Today, I read # include "apue. H" in the "advanced programming for UNIX environments" book. It is a header file written by him. On www.apuebook.com, I can find allCode. Code package download link: http://www.apuebook.com/src.tar.gz 1. Download the code package 2. decompress the code package to the working directory and decompress it to/root/apue/and tar-xzvf

Linux/Unix System Programming Manual Reading Notes Chapter 2 This chapter describes users and groups, including the/etc/passwd, shadow,/etc/shadow, and/etc/group. Each user has a user name and a user ID (UID ). A user can belong to a group. Each group has a unique group name and associated Group Identifier (GID ). Users and groups are used as follows: 1. Ownership of various system resources can be determin