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Linux System Programming Techniques

You're reading from   Linux System Programming Techniques Become a proficient Linux system programmer using expert recipes and techniques

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Product type Paperback
Published in May 2021
Publisher Packt
ISBN-13 9781789951288
Length 432 pages
Edition 1st Edition
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Author (1):
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Jack-Benny Persson Jack-Benny Persson
Author Profile Icon Jack-Benny Persson
Jack-Benny Persson
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Table of Contents (14) Chapters Close

Preface 1. Chapter 1: Getting the Necessary Tools and Writing Our First Linux Programs 2. Chapter 2: Making Your Programs Easy to Script FREE CHAPTER 3. Chapter 3: Diving Deep into C in Linux 4. Chapter 4: Handling Errors in Your Programs 5. Chapter 5: Working with File I/O and Filesystem Operations 6. Chapter 6: Spawning Processes and Using Job Control 7. Chapter 7: Using systemd to Handle Your Daemons 8. Chapter 8: Creating Shared Libraries 9. Chapter 9: Terminal I/O and Changing Terminal Behavior 10. Chapter 10: Using Different Kinds of IPC 11. Chapter 11: Using Threads in Your Programs 12. Chapter 12: Debugging Your Programs 13. Other Books You May Enjoy

The what and why of libraries

Before we go into the details of libraries, it's essential to understand what they are and why they matter to us. It's also important to understand the difference between static and dynamic libraries:

This knowledge will enable you to make smarter choices when making your own libraries.

A dynamic library is dynamically linked to the binary that uses it. What this means is that the library code isn't included in the binary. The library resides outside of the binary. This has several advantages. First, the resulting binary will be smaller in size since the library code isn't included. Second, the library can be updated without needing to recompile the binary. The disadvantage is that we can't move or delete the dynamic library from the system. If we do, the binary won't work anymore.

A static library, on the other hand, is included inside the binary file. The advantage of this is that the binary will be completely independent...

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