System Programming

MiniShell - Custom Unix Shell

A lightweight Unix shell written in C, replicating essential Bash behaviors including pipes, redirections, environment variable expansion, and built-in commands.

Project Overview

Minishell is a custom command-line interpreter developed in C as part of the 42 Network curriculum. The project aims to replicate the core functionality of the Bash shell, providing an interactive environment where users can execute system commands, use pipes, and handle redirections.

It supports a set of built-in commands such as `cd`, `echo`, `pwd`, `env`, `export`, `unset`, and `exit`, along with full environment variable management and signal handling.

The implementation features a lexer and parser for tokenizing user input, an executor for process management, and a robust error-handling system to prevent crashes or leaks.

This project strengthened my understanding of processes, file descriptors, inter-process communication, and Unix system calls.