Simple Command Line Interface

This repository contains a simple shell emulator implemented in Python. The shell provides basic functionalities such as executing built-in commands, navigating the filesystem, and running external commands.

Features

• Built-in Commands:

  • echo: Prints the provided message to the console.
  • pwd: Displays the current working directory.
  • cd: Changes the current working directory. Supports relative, absolute, and home directory paths.
  • type: Displays the type of a command (builtin or external).
  • exit: Exits the shell. Optionally accepts 0 as an argument for a clean exit.

• External Command Execution:

  • Executes commands found in directories listed in the PATH environment variable.

Usage

1. Clone the repository:

   git clone https://github.com/<username>/python-shell-emulator.git
   cd python-shell-emulator

2. Run the shell emulator

   python shell_emulator.py
   

3. Interact with the shell by typing commands:

   $ echo Hello, World!
   Hello, World!
   
   $ pwd
   /home/user/python-shell-emulator
   
   $ cd ..
   $ pwd
   /home/user
   
   $ type echo
   echo is a shell builtin
   

4. Exit the shell:

   $ exit 0
   

Requirements

• Python 3.x

Limitations

• Limited to basic command-line functionalities.
• Assumes a Unix-like environment (e.g., Linux, macOS) for PATH handling and command execution.
• Does not handle advanced shell features like pipes, redirection, or background processes.

Contributions

Contributions are welcome! Feel free to fork the repository and submit a pull request for improvements or new features.

License

This project is licensed under the MIT License. See the LICENSE file for details.

bash Copy code $ exit 0