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Using Coreutils in Rust

David Li
3 min readMay 7, 2023

Rust is a systems programming language that aims to provide memory safety, concurrency, and performance. It is an excellent choice for building command-line tools and utilities, making it a natural fit for implementing coreutils, the collection of basic file, shell, and text manipulation tools found on Unix-like systems.

In this article, we will explore how to create coreutils in Rust, focusing on a few examples to demonstrate the power and flexibility of the language.

Table of contents

  1. Introduction to coreutils
  2. Setting up a Rust project
  3. Implementing cat
  4. Implementing wc
  5. Implementing ls
  6. Conclusion

Introduction to coreutils

Coreutils is a package that contains many essential Unix command-line utilities, such as ls, cat, rm, cp, and mv. These utilities are fundamental to working with Unix-like systems and help users perform simple tasks like listing directories, concatenating files, and deleting files.

In this article, we will implement three coreutils in Rust:

  • cat: concatenate files and print on the standard output
  • wc: print newline, word, and byte counts for each file

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