Return when we can't open the USB device

Most commonly this means insufficent permissions (ie. for got to use sudo).

1 files changed, 4 insertions, 0 deletions

diff --git a/riff/main.cpp b/riff/main.cpp
index 5ce8e65..803ebe7 100644
--- a/riff/main.cpp
+++ b/riff/main.cpp
@@ -131,6 +131,10 @@ void UsbDeviceEventCallback(DeviceStatus_t status, DeviceEvent_t event, Device_t
             logger_->log(Logger::ERROR, "Unknown USB event %d", event);
             break;
         }
+    } else if (COMM_DEVICE_LIBUSB_FAILED_TO_OPEN_PORT == status) {
+        logger_->log(Logger::ERROR, "Cannot open USB device. Are you root?", status);
+        isDone = true;
+        exitstatus = 1;
     } else {
         logger_->log(Logger::ERROR, "USB device error %d", status);
     }