Some debugging output for usb_open().

1 files changed, 3 insertions, 0 deletions

diff --git a/src/usbmux.c b/src/usbmux.c
index e86e3bc..90aeb84 100644
--- a/src/usbmux.c
+++ b/src/usbmux.c
@@ -329,6 +329,9 @@ int usbmux_get_specific_device(int bus_n, int dev_n,
                         if (dev->devnum == dev_n) {
                                 newdevice->__device = dev;
                                 newdevice->usbdev = usb_open(newdevice->__device);
+                                if (!newdevice->usbdev) {
+                                        fprintf(stderr, "%s: Error: usb_open(): %s\n", __func__, usb_strerror());
+                                }
                                 if (usbmux_config_usb_device(newdevice) == 0) {
                                         goto found;
                                 }