mini-linux-shell

Mini Linux Shell in C++ using fork–exec–wait, built for learning system-level processes and command execution.

This is a minimal Linux shell implemented in C++ to explore how commands are executed and processes are managed behind the scenes.

Features

Shell

• Execute system commands (ls, pwd, date)
• Command arguments support (ls -l)
• Built-in cd command handled in parent process
• Error handling for invalid commands

MCP (Model Context Protocol) - Experimental

• Minimal MCP server implemented in cpp
• Communicates via JSON-RPC over stdin/stdout
• Exposes shell context as a tool :
  • get_last_shell_command → returns the most recently executed command and exit code
• Focuses on tooling & protocol, not AI logic

Environment

• Ubuntu (WSL2) on Windows, tested with g++ and Makefile

Future Improvements

• Pipe support (|)
• Input/output redirection (> / <)
• Signal handling (Ctrl+C)
• Command history

This project demonstrates practical system programming concepts in C++ in a compact, easy-to-understand way.

Run

make
./mini-shell --mcp