🐚 Rust Shell

A Unix-like shell implemented in Rust, built incrementally to closely match real shell behavior while keeping the implementation understandable and explicit.

This project was developed stage-by-stage, focusing on correct semantics rather than shortcuts provided by existing libraries.

---

✨ Features

✅ Core Execution

• Execute external commands via $PATH
• Built-in commands:
  • echo
  • cd
  • pwd
  • type
  • exit
  • history

---

📜 History Management

• In-memory command history
• Plain-text history persistence (POSIX-style, no metadata headers)
• Supports:
  • history — show full history
  • history N — show last N entries (correct global numbering)
  • history -r FILE — read history from file
  • history -w FILE — write history to file
  • history -a FILE — append new entries only
• Honors $HISTFILE on startup
• Matches bash-style numbering and behavior

---

🔗 Pipelines

• Supports multi-command pipelines:

  cmd1 | cmd2 | cmd3 | ...
  
  

⚠️ Current Limitations

The shell currently implements a subset of basic bash features.
The following are still not supported

• No logical operators

  • && and || are not supported
  • Expressions like cmd1 && cmd2 or cmd1 || cmd2 result in error

• No background execution

  • & is not supported
  • All commands run in the foreground

• No command substitution

  • Constructs like $(command) or `command` are not supported

will implement them ass soon ass possible

Yes this is written by AI i am too lazy sorry