Minishell

🗣️ About

Minishell is a shell written in C as a team project of the 42 Madrid common core (grade: 100/100). It provides a basic command-line interface where users can execute commands and interact with the operating system, mimicking the behavior of bash.

✨ Features

• Command Execution: Runs external programs from PATH and the built-ins echo, cd, pwd, export, unset, env and exit.
• Redirection: Handle input (<, <<) and output (>, >>) redirections.
• Pipes: Chain multiple commands using pipes (|).
• Environment Variables: Manage environment variables with export and unset, and expand them with $.
• Signal Handling: Ctrl+C, Ctrl+D and Ctrl+\ behave as they do in bash.
• Command History: Previous commands with the arrow keys, through readline.

🏗️ Architecture

The parsing logic is a critical component of Minishell. The following diagram illustrates how the command line input is processed:

🚀 Getting Started

Prerequisites

• GCC or Clang
• Make
• Readline library

Installation

1. Clone the repository:

   git clone https://github.com/VolmerES/Minishell.git

2. Navigate to the project directory:

   cd Minishell

3. Compile the project:

   make

🛠️ Usage

Run the shell:

./minishell

Examples

Execute commands:

minishell$ ls -l

Redirection:

minishell$ grep "error" < log.txt > errors.txt

Pipes:

minishell$ ps aux | grep minishell

Environment Variables:

minishell$ export MY_VAR="Hello World"
minishell$ echo $MY_VAR

Authors

• Luis David Díaz (ldiaz-ra) · @davidiaz1251
• Juan Bautista Delorme (jdelorme) · @VolmerES · Portfolio · LinkedIn