Shell - Python Implementation

A custom shell environment written in Python. The Shell supports basic built-in commands and can execute external commands from the system PATH. This project serves as a lightweight shell environment, showcasing the fundamentals of shell programming and Python scripting.

Table of Contents

• Introduction
• Features
• Getting Started
  • Prerequisites
  • Installation
• Usage
• Built-in Commands
• Directory Structure

Introduction

The Shell is a custom Python-based shell environment designed to handle common built-in commands such as echo, pwd, cd, and more. Additionally, it allows execution of external commands available in the system's PATH.

The shell is lightweight, making it a great starting point for learning shell programming or extending functionality for specific use cases.

Features

• Built-in commands: echo, pwd, cd, type, and exit.
• Command Execution: Supports running external commands from the system's PATH.
• Error Handling: Provides feedback for invalid commands or directories.
• Cross-platform Compatibility: Runs on any system with Python 3.x.

Getting Started

Prerequisites

• Python 3.6 or higher

Installation

1. Clone the repository:

   git clone https://github.com/artpedro/shell-python.git
   cd shell-python

Usage

Run the shell locally using the provided script:

./your_program.sh

Example Session

$ echo Hello, world!
Hello, world!
$ pwd
/home/user
$ cd /tmp
$ pwd
/tmp
$ exit 0

Built-in Commands

Command	Description
echo	Prints the input string to the terminal.
pwd	Displays the current working directory.
cd	Changes the current directory.
type	Checks if a command is a shell built-in or external.
exit 0	Exits the shell environment.

Directory Structure

artpedro-shell-python/
├── your_program.sh   # Shell script to run the program
└── app/
    └── main.py       # Python implementation of the shell