How do I get a device path of a efi image? about uefi-rs

[nicholasbishop]

Here's an example of getting the path of an executable in the same filesystem as the currently-running image:

uefi-rs/uefi-test-runner/src/bin/shell_launcher.rs

Lines 24 to 44 in 7e18c2d

	fn get_shell_app_device_path<'a>(
	boot_services: &BootServices,
	storage: &'a mut Vec<u8>,
	) -> &'a DevicePath {
	let loaded_image_device_path = boot_services
	.open_protocol_exclusive::<LoadedImageDevicePath>(boot_services.image_handle())
	.expect("failed to open LoadedImageDevicePath protocol");
	let mut builder = DevicePathBuilder::with_vec(storage);
	for node in loaded_image_device_path.node_iter() {
	if node.full_type() == (DeviceType::MEDIA, DeviceSubType::MEDIA_FILE_PATH) {
	break;
	}
	builder = builder.push(&node).unwrap();
	}
	builder = builder
	.push(&build::media::FilePath {
	path_name: cstr16!(r"efi\boot\shell.efi"),
	})
	.unwrap();
	builder.finalize().unwrap()

[Luxvao]

Okay that makes sense. Thanks!