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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
Tools
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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

Deleting files

In this recipe, we learn how to delete files using a system call and where the name—unlink()—comes from. This recipe will enhance your understanding of links and close the circle. This will improve your overall knowledge of Linux and its filesystem. Knowing how to delete files using the system call will enable you to remove files directly from within your programs.

Here we will write our own version of rm, which we will call remove. After this recipe, we know how to create and delete files and how to make links. These are some of the most common filesystem operations.

Getting ready

In this recipe, we will use the my-stat-v1 program, which we wrote in the Reading inode information and learning the filesystem recipe. We will also continue experimenting on the filenames we created in the previous recipes, my-file, another-name, and third-name. Except for that, you'll need what's listed under Technical requirements for this chapter, that...

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