Minishell

A simplified shell implementation written in C, inspired by bash. This is a 42 school project.

Features

• Interactive prompt with user, shell level and color display
• Command execution with absolute/relative paths and $PATH resolution
• Pipes (|) to chain commands
• Redirections: <, >, >>, << (heredoc)
• Environment variable expansion ($VAR, $?)
• Single and double quote handling
• Signal handling (Ctrl+C, Ctrl+D, Ctrl+\)
• Built-in commands:
  • echo (with -n option)
  • cd (with relative/absolute path, ~, ..)
  • pwd
  • export
  • unset
  • env
  • exit

Requirements

• macOS or Linux
• gcc
• make
• readline library (installed via Homebrew on macOS)

Build

make        # compile the project
make clean  # remove object files
make fclean # remove object files and executable
make re     # full recompile

Usage

./minishell

Project structure

.
├── Makefile
├── includes/
│   └── minishell.h
├── src/
│   ├── Main/           # Entry point
│   ├── Builtin/        # Built-in commands (cd, echo, env, exit, export, pwd, unset)
│   ├── Lexer/          # Tokenization of input
│   ├── Parse/          # Command parsing, redirections, heredoc
│   ├── Envvar/         # Environment variable expansion
│   ├── Execute/        # Command execution, pipes, redirections
│   ├── Signals/        # Signal handling
│   ├── Get_input/      # Readline input and validation
│   ├── Cleanup/        # Memory management and freeing
│   ├── Lib_utils/      # Utility functions
│   └── init/           # Shell initialization
└── Libft/              # Custom C library (libft, ft_printf, get_next_line)

Authors

42 school project.