# Bootloader Update Manager

A C-based web application for updating kernel, device-tree, and U-Boot environment files on Orange Pi Zero 2W.

## Features

- **Web Interface**: Modern, responsive UI for easy file management
- **Kernel Update**: Upload `Image.gz` to boot partition
- **Device-Tree Update**: Upload `sun50i-h618-orangepi-zero2w.dtb`
- **U-Boot Environment**: Upload `uboot.env`
- **extlinux.conf Editor**: View and edit boot configuration
- **Progress Bar**: Real-time upload progress tracking
- **Auto-mount**: Automatically mounts `/dev/mmcblk1p1` to `/media`
- **Large File Support**: Upload files up to 200MB

## Requirements

- GCC compiler
- [Mongoose](https://mongoose.ws) - Embedded web server
- [cJSON](https://github.com/DaveGamble/cJSON) - JSON parser
- Root privileges (for mounting devices)

### Installing Dependencies

**Ubuntu/Debian:**
```bash
# Install mongoose (or build from source)
sudo apt-get install libmongoose-dev

# Install cJSON
sudo apt-get install libcjson-dev
```

**Build from source:**
```bash
# Mongoose
git clone https://github.com/cesanta/mongoose.git
cd mongoose && make && sudo make install

# cJSON
git clone https://github.com/DaveGamble/cJSON.git
cd cJSON && mkdir build && cd build && cmake .. && make && sudo make install
```

## Building

```bash
make
```

## Running

```bash
sudo make run
# or
sudo ./up
```

The server will start on **http://localhost:8080**

## API Endpoints

| Endpoint | Method | Description |
|----------|--------|-------------|
| `/api/upload` | POST | Upload files (kernel, dtb, uboot) |
| `/api/extlinux` | GET | Read extlinux.conf |
| `/api/extlinux` | POST | Write extlinux.conf |
| `/api/progress` | GET | Get upload progress |
| `/api/mount` | GET | Get mount status |

## Upload Parameters

For `/api/upload`:
- `type`: File type (`kernel`, `dtb`, or `uboot`)
- `file`: The file to upload

## File Locations

| Type | Destination File |
|------|------------------|
| Kernel | `/media/Image.gz` |
| Device-Tree | `/media/sun50i-h618-orangepi-zero2w.dtb` |
| U-Boot Env | `/media/uboot.env` |
| Extlinux | `/media/extlinux.conf` |

## Project Structure

```
.
├── main.c          # Main application (C server)
├── index.html      # Web interface HTML
├── style.css       # Web interface styles
├── app.js          # Frontend JavaScript
├── Makefile        # Build configuration
└── README.md       # This file
```

## Screenshots

The web interface includes:
- System status panel showing mount state
- Tabbed upload interface for different file types
- Real-time progress bar during uploads
- Full-featured text editor for extlinux.conf

## Security Notes

⚠️ **Warning**: This application requires root privileges to mount devices. Use with caution and ensure proper access controls in production environments.

## License

MIT License