42-minishell

About · Running · Features

💡 About

As beautiful as a shell

This project is about creating a simple shell. Yes, your own little bash. You will learn a lot about processes and file descriptors.

🚀 Running

You need to install readline

sudo apt-get update
sudo apt-get install libreadline-dev

make run

It will automatically compile the project and run it.

./minishell

Will launch the previously compiled project with make and run it.

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📜 Features

• History
  -- Working history

• \
  -- Supports escaping characters with backslashes for proper command interpretation

• ' "
  -- Supports proper parsing of single and double quotes for string handling

• Redirections
  -- Supports input (<), here-doc (<<), output (>), and append (>>) redirections

• Environnemts variables
  -- Supports retrieving, setting, and expanding environment variables

• $?
  -- Displays the exit status of the last executed command

• Signals
  -- Handles signals like CTRL-C (interrupt), CTRL-D (EOF), and CTRL-\ (quit)

• Builtins
  -- echo with -n option
  -- cd with relative, absolute, and - ($OLDPWD) paths
  -- pwd
  -- export
  -- unset
  -- env
  -- exit

• Others
  -- $SHLEVEL
  Increments SHLVL by one. Sets it to one if SHLVL is invalid (not between 1 and 999)
  -- $PWD
  Updates PWD to reflect the current directory after a cd command or if no PWD is present in the environment
  -- $OLDPWD
  Updates OLDPWD after a cd command or if no OLDPWD is present in the environment
  -- Prompt
  A beautiful, colorful prompt that displays the current PWD at the beginning

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This group project was done by MVPee and Nour Echaara