# Custom Shell

A fully-featured custom command-line shell written in C, demonstrating system-level programming with features like piping, input/output redirection, command history with SQLite database support, command aliases, and tab completion.

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## Features

- Execute commands with support for I/O redirection (`>`, `<`) and pipes (`|`)
- Background job execution with `&`
- Command history stored persistently using SQLite
- User-defined command aliases
- Tab completion using GNU Readline
- Signal handling for clean interruption (Ctrl+C)
- Modular codebase for easy maintenance and extensibility

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## Prerequisites

- Linux environment (Recommended: WSL on Windows, Ubuntu, etc.)
- GCC compiler
- GNU Readline library
- SQLite3 development libraries
- Make

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## Installation & Build

1. Clone the repository:

   ```bash
   git clone https://github.com/yourusername/custom-shell.git
   cd custom-shell

2. Build the project:

   make

3. Run the shell:

   ./shell

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Usage

Type commands as you would in a regular shell. Use arrow keys for command history navigation. Press Tab for auto-completion of commands and aliases.

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Project Structure

• src/ — Source code files
• include/ — Header files
• Makefile — Build instructions
• README.md — This file

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Contribution

Contributions are welcome! Feel free to open issues or submit pull requests.

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License

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

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