🚀 Custom Shell in C++

A lightweight, minimalist shell built in C++ that mimics basic Unix shell behavior. This shell supports built-in commands, path resolution, and external command execution.

🔹 Features

✔️ Basic shell prompt with user info
✔️ Built-in commands: echo, exit, type
✔️ Execute system commands like ls, pwd, cat
✔️ Custom path resolution using $PATH
✔️ Handles single (' ') and double (" ") quotes correctly
✔️ Supports whitespace-separated arguments and paths as well

📌 Example Usage

ubuntu % echo "Hello, World!"
Hello, World!

ubuntu % ls
devsh.cpp  mysh

ubuntu % type echo
echo is a shell builtin

ubuntu % exit

📌 How It Works

🛠 Built-in Commands

Command	Description
echo "Hello"	Prints Hello to the console
exit && exit0	Exits the shell
type command	Checks if a command is built-in or present in binary path

💻 Running System Commands

You can execute any system command available in $PATH:

ls -l
pwd
cat file.txt

📦 Installation & Usage

🛠 Prerequisites

Ensure you have:

• g++ (GCC Compiler)
• Linux/macOS terminal (Windows users can use WSL)

⚡ Installation Steps

1️⃣ Clone the repository

git clone https://github.com/sd191100/devsh-shell.git

2️⃣ Compile the shell

g++ devsh.cpp -o devsh -std=c++17 -lstdc++fs

-std=c++17 and -lstdc++fs are optional parameters

3️⃣ Run the shell

./devsh

Now, you're inside your custom shell! 🎉

ubuntu % echo "Hello, World!"
Hello, World!