42sh is a custom Unix shell written in C as part of the EPITECH curriculum.
Inspired by tcsh, this project aims to recreate a powerful, interactive command-line interface, complete with many built-in features, scripting capabilities, and user-friendly enhancements.
- Built-in commands:
cd,echo,exit,alias,setenv,unsetenv,env,printenv,which,where,repeat,yes,termname,expr, and more...
- Redirections:
- Input/output redirection support:
>,<,>>,<<(here-documents)
- Input/output redirection support:
- Pipelines:
- Command chaining using pipes (
|)
- Command chaining using pipes (
- Globbing:
- Wildcard expansion (
*,?, etc.)
- Wildcard expansion (
- Job control:
- Background job handling with
&fgbgCtrl+Z
- Background job handling with
- History:
- Command history navigation using arrow keys
- Interractive reverse search:
- Search in the history with
Ctrl+R
- Search in the history with
- Line editing:
- Interactive line editing and cursor movement
- Auto completion:
- Interactive auto completion with
TAB
- Interactive auto completion with
- Git integration:
- Dynamic prompt with branch name, ahead and behind indicator
- Alias system:
- Define and expand custom aliases
- Environment variables:
- Manage the shell’s environment
- And more...
git clone https://github.com/Savapitech/42sh.git
cd 42sh
make
./42sh- Requires a POSIX-compliant system and a C compiler (tested with gcc on Linux).
42sh/
├── include/ # Header files
├── src/ # Shell source code
├── ulib/ # Custom utility libraries
├── validation_tests.py # Functional tests
├── Makefile # Build system
└── README.md # You're reading it!- Lexer/Parser: Tokenizes user input into an Abstract Syntax Tree (AST)
- Executor: Traverses the AST to execute commands
- Builtins: Custom implementation of standard shell commands
You can run the test suite using:
make tests_run(Requires python3)
This project provides full support for Nix:
- You can run the shell directly with:
nix run github:Savapitech/42sh- If you are working on the project, a development environment is available via the flake:
nix developThis gives you access to a reproducible devShell with all required dependencies.
Written in C99
Follows the EPITECH coding style
No memory leaks (only if no errors occured)
Handles signals (e.g., Ctrl+C, Ctrl+D)
Compatible with tcsh-style interactive behavior
This project is part of the Epitech curriculum and is shared for educational purposes.
@savalet, @tekClovis, @Arthur-gtr, @Titouanhct, @eiffis