🐚 Simple C Shell v2.0

A lightweight Unix-like shell implementation in C, supporting built-in commands and execution of external programs. Perfect for learning shell fundamentals! 🧠

---

🚀 Features

🛠️ Built-in Commands

Command	Emoji	Description
echo	📢	Display arguments
cd	📂	Change directory
pwd	🗺️	Print working directory
type	🔍	Identify command type
exit	🚪	Quit shell
cat	🐈	Display file contents
clear	🧹	Clear terminal screen
sort	🔢	Sort file contents
head	👆	Show file head
grep	🔎	Pattern search
rm	🗑️	Remove files or directories
mv	🔀	Move or rename files
cp	📄	Copy files or directories
mkdir	📁	Create directories
help	❓	Show help documentation
ps	📊	Show process status
df	💽	Show disk usage
top	📈	Show real-time system stats

• 🌐 External Command Execution: Searches PATH for valid executables
• 🛡️ Error Handling: Clear error messages for common issues
• 💻 Interactive Interface: Familiar shell prompt experience

---

📦 Installation & Usage

Compile the Shell 🔧

gcc main.c -o shell

Run the Executable 🚀

./shell

Start Exploring 🔭

$ pwd
/home/user
$ help grep

---

📚 Examples

📂 File Operations

cat document.txt          # 🐈 Display file
sort lines.txt            # 🔢 Sort content
head -n 5 log.txt         # 👆 Show first 5 lines
rm file.txt               # 🗑️ Remove a file
rm -r folder              # 🗑️ Remove a directory
mv file1 file2            # 🔀 Rename or move a file
cp source.txt dest.txt    # 📄 Copy a file
mkdir new_folder          # 📁 Create a new directory

🔍 Searching

grep -i "error" system.log   # 🔎 Case-insensitive search
grep -nv "debug" app.log     # 🔍 Inverted match with line numbers

🧭 Navigation

cd ~/projects  # 📂 Change directory
pwd            # 🗺️ Show current path

ℹ️ Information

type ls    # 🔍 Shows executable path
help cd    # ❓ Displays documentation

📊 System Monitoring

ps               # 📊 Show current shell processes
ps -e            # 📊 Show all processes
ps -u root       # 📊 Show processes by user
ps aux           # 📊 BSD-style output of all processes

df               # 💽 Show filesystem usage
df -h            # 💽 Human-readable sizes
df -T            # 💽 Show filesystem types

top              # 📈 Real-time CPU/memory usage
top -u username  # 📈 Filter by user
top -n 1         # 📈 Run for 1 iteration

---

🤝 Contribution

Contributions welcome! 🎉 Please:

1. 🐛 Open an issue to discuss changes
2. 🌱 Fork the repository
3. ✨ Create a feature branch
4. 📝 Submit a PR with a detailed description

---

📜 License

MIT License © 2023 Mohamed Selim Mahjoub

---

Author

👨💻 Mohamed Selim Mahjoub