minishell

A simple bash like shell Features:

• Quotes " and ', environment variables with $
• export a=b and unset
• Pipes |, and &&, or ||
• Parens for additional forking (ls && echo heyo) | cat
• Redirections < >> > and heredoc <<

Some stuff we use:

• A hashmap to store environment variables for faster access
• A cached path for faster command search
• No unnecesarry copies for things like envp generation, always using pointer references
• Unit testing with google test framework for testing tokenizer, parser and the hashmap
• Github Actions for automating tests and norminette linting.

Installation

git clone git@github.com:ytkimirti/minishell.git --recursive
cd minishell
make
./minishell

To run the tests, you have to have a C++ compiler

make test

Differences from bash

• It does not support word splitting.
• Redirections after parentheses does not work like (ls) >out
• Multiple readlines opening with cat <<a | cat <<b
• echo and exit command flags
• Handling of the signal SIGQUIT