Book Image

Hands-On System Programming with Go

By : Alex Guerrieri
Book Image

Hands-On System Programming with Go

By: Alex Guerrieri

Overview of this book

System software and applications were largely created using low-level languages such as C or C++. Go is a modern language that combines simplicity, concurrency, and performance, making it a good alternative for building system applications for Linux and macOS. This Go book introduces Unix and systems programming to help you understand the components the OS has to offer, ranging from the kernel API to the filesystem. You'll then familiarize yourself with Go and its specifications. You'll also learn how to optimize input and output operations with files and streams of data, which are useful tools in building pseudo-terminal applications. You'll gain insights into how processes communicate with each other, and learn about processes and daemon control using signals, pipes, and exit codes. This book will also enable you to understand how to use network communication using various protocols, including TCP and HTTP. As you advance, you'll focus on Go's best feature - concurrency, which will help you handle communication with channels and goroutines, other concurrency tools to synchronize shared resources, and the context package to write elegant applications. By the end of this book, you will have learned how to build concurrent system applications using Go
Table of Contents (24 chapters)
Free Chapter
Section 1: An Introduction to System Programming and Go
Section 2: Advanced File I/O Operations
Section 3: Understanding Process Communication
Section 4: Deep Dive into Concurrency
Section 5: A Guide to Using Reflection and CGO


In this chapter, we looked at an overview of how to execute file operations in Go. In order to locate files, an extensive array of functions are offered by the filepath package. These can help you execute all kind of operations, from composing paths to extracting elements from it.

We also looked at how to read an operation using various methods, from the easiest and less memory efficient ones that are located in the io/ioutil package to the ones that require an io.Writer implementation to read a fixed chunk of bytes. The importance of the ability to peek content, as implemented in the bufio package, allows for a whole set of operations like read word or read line, which stop the reading operation when a token is found. There are other interfaces that are satisfied by files that are very useful; for example, io.Closer ensures that the resource is...