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
1
Section 1: An Introduction to System Programming and Go
5
Section 2: Advanced File I/O Operations
9
Section 3: Understanding Process Communication
14
Section 4: Deep Dive into Concurrency
19
Section 5: A Guide to Using Reflection and CGO

Chapter 3

  1. What's the difference between an exported and an unexported symbol?
    Exported symbols can be used by other packages, whereas unexported symbols cannot. The first group has an identifier that starts with a capital letter, while the second group does not.
  2. Why are custom types important?
    Custom types allow methods to be defined and interfaces to be used effectively, or the data structure of another type to be inherited, but getting rid of its methods.
  3. What is the main limit of a short declaration?
    Short declarations do not allow the variable type inferred by the value to be defined. A type casting of the value enables this limitation to be overcome.
  4. What is scope and how does it affect variable shadowing?
    The scope of a variable represents its lifetime and visibility that can be package, function, or blocked. Shadowing is when the same identifier gets used...