Score: 125/100
Finished: 27.05.2024
Team: @jojomo96 & @flomero

minishell

As beautiful as a shell

Summary:

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

Usage

$ make
$ ./minishell

Features

• A Prompt just like Bash with working history
• History is saved during sessions
• Builtin Commands:
  • echo (with option -n)
  • cd (with relative & absolute path and - and ~)
  • pwd
  • export (with and without args, supports +=)
  • unset
  • env
  • exit
• execution of external Commands using the $PATH, as well as relative or absolute Paths
• Redirections: <, >, << & >>
• Logic Operators: &&, || and parenthesis
• Pipes |: The output of each command in the pipeline is connected to the input of the next command via a pipe.
• Expansion:
  • handle env Variables starting with $
  • handle $?
  • handle wildcard expansion using * and ?
• Support interactive and non-interactive mode
• Signal Handling for CRTl+C, CRTl+D & CRTl+\

Debug

• run make debug to enable debug prints
• run make tree to enable outputting of the AST to dot-format

Example of AST Visulization

(echo ok1 && echo ok2) || cd /fail3 && echo ok4 || echo ok5 || echo ok6 | grep ok1 >> out