CRASH

Project Overview

CRASH is a shell I built as my final project for Operating Systems. It's written in C++ for a Linux environment and implements the GNU Readline library for input handling.

The shell executes commands, manages background processes, keeps command history, runs startup scripts, and even suggests the closest valid command when one isn't found.

Features:

• Interactive Linux Shell prompt with current user and current working directory.
• Executes programs using PATH lookup and recursive file searching.
• Command suggestion using Levenshtein Distance.
• Supports:
  • Background processes with: &
  • Sequential commands with: ;
  • Change Directory with: cd
  • Script execution with: .(filename)
  • Environment Variable expansion and assignment.
• Full implementation of GNU Readline.
• Startup config with .crash script.
• Signal handling to terminate processes.