﻿example/hotplugtest: Ignore unavailable devices (libusb#1425)

sonatique · web-flow · commit a790a6df7998 · 2025-08-20T18:15:15.000+02:00
Depending on the devices or drivers, open() may return
 LIBUSB_ERROR_ACCESS
 LIBUSB_ERROR_NOT_FOUND
 LIBUSB_ERROR_NOT_SUPPORTED
for devices "out of reach" to libusb.
diff --git a/examples/hotplugtest.c b/examples/hotplugtest.c
@@ -53,7 +53,12 @@ static int LIBUSB_CALL hotplug_callback(libusb_context *ctx, libusb_device *dev,
 			libusb_close (handle);
 		}
 		handle = new_handle;
-	} else {
+	} else if (LIBUSB_ERROR_ACCESS != rc
+#if defined(PLATFORM_WINDOWS)
+		&& LIBUSB_ERROR_NOT_SUPPORTED != rc
+		&& LIBUSB_ERROR_NOT_FOUND != rc
+#endif
+		) {
 		fprintf (stderr, "No access to device: %s\n",
 			 libusb_strerror((enum libusb_error)rc));
 	}

Original file line number	Diff line number	Diff line change
`@@ -53,7 +53,12 @@ static int LIBUSB_CALL hotplug_callback(libusb_context ctx, libusb_device dev,`
`53`	`53`	`libusb_close (handle);`
`54`	`54`	`}`
`55`	`55`	`handle = new_handle;`
`56`		`- } else {`
	`56`	`+ } else if (LIBUSB_ERROR_ACCESS != rc`
	`57`	`+#if defined(PLATFORM_WINDOWS)`
	`58`	`+ && LIBUSB_ERROR_NOT_SUPPORTED != rc`
	`59`	`+ && LIBUSB_ERROR_NOT_FOUND != rc`
	`60`	`+#endif`
	`61`	`+ ) {`
`57`	`62`	`fprintf (stderr, "No access to device: %s\n",`
`58`	`63`	`libusb_strerror((enum libusb_error)rc));`
`59`	`64`	`}`