Rework configuration handling

libusb no longer caches descriptors in libusb_device but backends are
intended to be able to provide copies from memory. In the common linux
case we can use sysfs.

1 files changed, 8 insertions, 3 deletions

diff --git a/examples/lsusb.c b/examples/lsusb.c
index 509e0bd..5a83020 100644
--- a/examples/lsusb.c
+++ b/examples/lsusb.c
@@ -28,10 +28,15 @@ void print_devs(libusb_device **devs)
 	int i = 0;
 
 	while ((dev = devs[i++]) != NULL) {
-		const struct libusb_device_descriptor *desc =
-			libusb_get_device_descriptor(dev);
+		struct libusb_device_descriptor desc;
+		int r = libusb_get_device_descriptor(dev, &desc);
+		if (r < 0) {
+			fprintf(stderr, "failed to get device descriptor");
+			return;
+		}
+
 		printf("%04x:%04x (bus %d, device %d)\n",
-			desc->idVendor, desc->idProduct,
+			desc.idVendor, desc.idProduct,
 			libusb_get_bus_number(dev), libusb_get_device_address(dev));
 	}
 }