Mohammad Talim
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My Own Shell in C++

A POSIX-compliant shell built from scratch

🔹 Overview

This project is a fully functional shell written in C++ as part of the Build Your Own Shell challenge by CodeCrafters. It supports command execution, built-in commands, and a REPL (Read-Eval-Print Loop). The goal was to deepen my understanding of system programming, process management, and shell internals.

🚀 Features

✅ Command execution (runs external programs)

✅ Built-in commands: cd, pwd, echo, type, exit

✅ Command parsing and execution

✅ REPL (Read-Eval-Print Loop) for interactive shell experience

✅ Error handling and argument parsing

🔜 Planned Features:

  • Output redirection (>, <, |)
  • Autocompletion

Tech Stack & Tools

  • Language: C++
  • Build System: CMake
  • Dependency Management: vcpkg
  • Development Tools: VS Code, g++, Clang

Key Learnings

  • Process creation & management using fork() and execvp()
  • File system operations for commands like cd and pwd
  • Handling user input & tokenizing commands
  • CMake for build automation

Project Structure

  • src/ - Source code of the shell
  • include/ - Header files
  • build/ - Compiled files
  • CMakeLists.txt - Build configuration

Why I Built This?

I wanted to gain hands-on experience with system programming and operating system concepts like process creation, file handling, and command execution. This project helped me understand how real-world shells work under the hood.