🐚 Minishell - 42 Project

A custom shell implementation in C as part of the 42 curriculum. Minishell replicates the behavior of a Unix shell, handling commands, environment variables, pipes, redirections, and more. This project provides an excellent opportunity to deepen your understanding of processes, system calls, and input/output redirection.

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📋 Table of Contents

• 📖 Introduction
• ✨ Features
• ⚙️ Installation
• 🚀 Usage
• 📜 Commands Supported
• 🎯 Project Goals

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📖 Introduction

Minishell is a simple shell program that emulates basic functionalities of Bash. The project adheres to the requirements outlined by the 42 curriculum, focusing on:

• System programming
• Process control
• Memory management

✨ Features

• 🔄 Interactive Mode: Provides a prompt for user commands.
• 🏃 Execution of Commands: Runs executables from the system PATH.
• 🌐 Environment Variables: Handles $VARIABLE expansion.
• 🔗 Pipes (|): Supports command chaining via pipes.
• 📤 Redirections (>, <, >>): Redirects input/output streams.
• 🔧 Built-in Commands:
  • echo
  • cd
  • pwd
  • export
  • unset
  • env
  • exit
• 🛡️ Signal Handling: Proper handling of Ctrl+C, Ctrl+D, and Ctrl+\.
• ❌ Error Handling: Displays descriptive error messages for invalid commands.

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⚙️ Installation

1. Clone the repository:

   git clone https://github.com/HoudaChairi/42_Minishell.git
   cd 42_Minishell
   make

🚀 Usage

Start the shell:

./minishell

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📜 Commands Supported

Command	Description
echo	🗣️ Print arguments to the standard output.
cd	📂 Change the current working directory.
pwd	📍 Print the current directory.
export	📤 Set environment variables.
unset	❌ Unset environment variables.
env	🌐 Display environment variables.
exit	🚪 Exit the shell.

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🎯 Project Goals

• 🧠 Learn system programming concepts.

• 🛠️ Gain a deeper understanding of:

  • Process creation and management (fork, exec, wait).
  • File descriptors and redirection.
  • Unix signals.

• 💻 Develop a robust and user-friendly application.