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Go Systems Programming

You're reading from Go Systems Programming Master Linux and Unix system level programming with Go

Product type Paperback

Published in Sep 2017

Publisher Packt

ISBN-13 9781787125643

Length 466 pages

Edition 1st Edition

Languages

Go

Tools

Linux

Concepts

System Programming

Table of Contents (20) Chapters

Title Page

Credits

About the Author

About the Reviewer

www.PacktPub.com

Customer Feedback

Preface

1. Getting Started with Go and Unix Systems Programming

2. Writing Programs in Go FREE CHAPTER

3. Advanced Go Features

4. Go Packages, Algorithms, and Data Structures

5. Files and Directories

6. File Input and Output

7. Working with System Files

8. Processes and Signals

9. Goroutines - Basic Features

10. Goroutines - Advanced Features

11. Writing Web Applications in Go

12. Network Programming

Index

Searching files revisited

This section will teach you how to find files using criteria such as user ID, group ID, and file permissions. Although this section could have been included in Chapter 5, Files and Directories, I decided to put it here, because there are times when you will want to use this kind of information in order to inform a system administrator that there is something wrong with the system.

Finding the user ID of a user

This subsection will present a program that shows the user ID of a user, given their username, which is more or less the output of the id -u utility:

$ id -u33$ id -u root0

The fact that there exists a Go package named user, which can be found under the os package that can help you implement the desired task, should not come as surprise to you. The name of the program will be userID.go, and it will be presented in two parts. If you give no command-line arguments to userID.go, it will print the user ID of the current user; otherwise, it will print the user ID of...

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