UNIX Shell in C

This is a simple UNIX-like shell implemented in C. The shell supports running Linux commands, I/O redirection, piping, command history, and signal handling.

---

Features

1. Display a shell prompt (sh>) and read user input
2. Execute Linux system commands using fork and exec
3. Input (<) and output (>, >>) redirection
4. Command piping (|) – supports multiple pipes
5. Multiple commands in-line separated by (;)
6. Multiple commands in sequence using (&&)
7. Command history support (history command)
8. Signal handling – pressing Ctrl+C won’t terminate the shell, only the running process

---

Compilation & Run

1. Command for Clone the repository

   git clone https://github.com/MahirFaisal08/unix-shell-c.git
   cd unix-shell-c
   
   

2. Command for Compile the shell

   gcc unix-shell-c.c -o mysh
   
   

3. Command for Run the shell

   ./mysh

---

Example Usage

sh> pwd /home/user/projects

sh> ls -l > files.txt

sh> cat files.txt | grep ".c"

sh> echo "Hello" >> output.txt

sh> history

1. pwd
2. ls -l > files.txt
3. cat files.txt | grep ".c"
4. echo "Hello" >> output.txt

---

Project Specs

• Basic shell functionality & built-in command support
• Input/output redirection (<, >, >>)
• Command piping (|)
• Signal handling (Ctrl+C)
• Logical operators (;, &&)
• Command history support

---

Future Improvements

• Add support for environment variables
• Implement tab auto-completion
• Add advanced error handling
• Improve history persistence (save across sessions)

---

Author

• Mahir Faisal
• GitHub Profile

---

License

This project is licensed under the MIT License – you are free to use, modify, and distribute this software with proper credit.
For more details, see the LICENSE file in this repository or visit the official MIT License.

---

Contributing

Contributions, issues, and feature requests are welcome!

If you’d like to contribute:

1. Fork the repository
2. Create a new branch (git checkout -b feature-branch)
3. Make your changes and commit (git commit -m "Add new feature")
4. Push to your branch (git push origin feature-branch)
5. Open a Pull Request

Check the Issues page for open tasks or feature requests.