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

Chapter 16

  1. What is CGO?
    CGO is a powerful Go tool that handles communication between C code and Go code. This allows C code to be used in a Go application and to leverage the huge amount of existing C libraries.
  2. How can you call C code from Go?
    Go offers a pseudo package called C that exposed C types, such as, and some functions that will convert Go strings and bytes into C character arrays, and vice versa. The comment that comes before the import C package will be interpreted as C code, and all the functions defined in it ( be it directly, or by importing files), will be available in Go as functions of the C package.
  3. How can you use Go code in C?
    If a Go function is preceded by a special comment, //export, this function will be available to the C code. It will also have to be defined as an external function in C.
  4. What are the differences in data types between Go and C...