...

Finding Cycles in a UNIX File System

Let’s learn how to find cycles in a UNIX file system.

We'll cover the following...

Coding example
Let’s try our code

This lesson implements a practical UNIX command-line utility that can find cycles (loops) in UNIX file systems. The idea behind the utility is that with UNIX symbolic links, there is a possibility to create cycles in our file system. This can perplex backup software such as tar(1) or utilities such as find(1) and can create security-related issues. The presented utility, which is called FScycles.go, tries to inform us about such situations.

Coding example

The idea behind the solution is that we keep every visited directory path in a map, and if a path appears for the second time, then we have a cycle. The map is called ...

Course Introduction

Introduction to Go

Basic Go Data Types

Composite Data Types

Reflection and Interfaces

Go Packages and Functions

Telling a UNIX System What to Do

Go Concurrency

Building Web Services

Working with TCP/IP and WebSocket

Working with REST APIs

Code Testing and Profiling

Working with gRPC

Go Generics

Conclusion

Appendix A—Go Garbage Collector

Finding Cycles in a UNIX File System

Coding example