Lists ISOs in given folder and allows you to turn the Steam Deck into a flash drive - Currently requires passwordless sudo for rmmod and modprobe to be setup

loader.py

#!/usr/bin/env python
import os
import subprocess
from PyQt6.QtWidgets import (
    QApplication, QMainWindow, QVBoxLayout, QPushButton, QWidget, QMessageBox, QScrollArea, QVBoxLayout
)

class IsoLoaderApp(QMainWindow):
    def __init__(self, iso_directory):
        super().__init__()
        self.iso_directory = iso_directory
        self.setWindowTitle('ISO/IMG Loader')
        
        # Maximize the window on launch
        self.showMaximized()
        
        # Main layout
        self.central_widget = QWidget()
        self.scroll_area = QScrollArea()
        self.button_container = QWidget()
        self.layout = QVBoxLayout(self.button_container)

        # Populate the container with buttons for ISO/IMG files
        self.populate_iso_buttons()

        self.scroll_area.setWidgetResizable(True)
        self.scroll_area.setWidget(self.button_container)

        # Add the scroll area to the central widget
        main_layout = QVBoxLayout(self.central_widget)
        main_layout.addWidget(self.scroll_area)
        self.setCentralWidget(self.central_widget)

    def populate_iso_buttons(self):
        """Create buttons for each ISO and IMG file in the directory."""
        if os.path.isdir(self.iso_directory):
            iso_img_files = sorted(
                [f for f in os.listdir(self.iso_directory) if f.endswith(('.iso', '.img'))]
            )
            for file_name in iso_img_files:
                button = QPushButton(file_name)
                button.setMinimumHeight(50)  # Set button height here
                button.clicked.connect(lambda checked, fn=file_name: self.load_iso(fn))
                self.layout.addWidget(button)
        else:
            self.show_message("Error", f"Directory '{self.iso_directory}' not found", is_error=True)

    def load_iso(self, file_name):
        """Load the selected ISO or IMG using the g_mass_storage module."""
        iso_path = os.path.join(self.iso_directory, file_name)
        try:
            # Unload the g_mass_storage module before loading a new file
            subprocess.run(
                ["sudo", "rmmod", "g_mass_storage"],
                check=False
            )
            
            # Command to load the ISO/IMG using g_mass_storage
            subprocess.run(
                ["sudo", "modprobe", "g_mass_storage", f"file={iso_path}"],
                check=True
            )
            self.show_message("Success", f"Loaded {file_name}")
        except subprocess.CalledProcessError as e:
            self.show_message("Error", f"Failed to load ISO/IMG: {e}", is_error=True)
        except Exception as e:
            self.show_message("Error", f"Unexpected error: {e}", is_error=True)

    def show_message(self, title, text, is_error=False):
        """Display a customized QMessageBox with a larger 'Ok' button."""
        msg_box = QMessageBox(self)
        msg_box.setWindowTitle(title)
        msg_box.setText(text)
        msg_box.setIcon(QMessageBox.Icon.Critical if is_error else QMessageBox.Icon.Information)
        
        # Customize the Ok button
        ok_button = msg_box.addButton(QMessageBox.StandardButton.Ok)
        ok_button.setMinimumHeight(50)  # Set button height here
        ok_button.setMinimumWidth(200)  # Optionally set the button width

        # Show the message box
        msg_box.exec()

if __name__ == "__main__":
    import sys
    app = QApplication(sys.argv)
    iso_directory = "/home/deck/iso"  
    window = IsoLoaderApp(iso_directory)
    window.show()
    sys.exit(app.exec())

usb-host.sh

#!/usr/bin/env bash
# PyQt6 is used which requires us to do some setup in a virtual environment
# Create the venv with
#    python -m venv ~/.local/share/usb-host
#    source ~/.local/share/usb-host/bin/activate
#    pip install PyQt6

source ~/.local/share/usb-host/bin/activate
python /home/deck/path/to/loader.py

For the passwordless sudo

/etc/sudoers.d/wheel

%wheel ALL=(ALL) ALL
%wheel ALL = (root) NOPASSWD: /usr/bin/rmmod g_mass_storage
%wheel ALL = (root) NOPASSWD: /usr/bin/modprobe g_mass_storage

Make sure DRD is enabled in the BIOS and that the /sys/class/udc/dwc3.1.auto exists before loading this up (I'll likely add this as a check later on)

20241101_230242.mp4