I wonder how hard it is to make a fake USB printer.
Like, a printer that takes any printout and goes "yep, that printed just fine" but nothing ever comes out anywhere
@foone the linux g_printer module and a raspberry pi is probably the most straightforward path, someone already has a project for it: https://github.com/Raspberryy/Emulated_USB_Printer
GitHub - Raspberryy/Emulated_USB_Printer: Using a Raspberry Pi Zero to emulate a USB-Printer

Using a Raspberry Pi Zero to emulate a USB-Printer - Raspberryy/Emulated_USB_Printer

GitHub