Repository navigation
USB error -1: My error message : Other Error #74
Description
Activity
UPDATE:
The bug is not in the library, but in the user program. The method LibUSB.getDeviceList() returns the number of devices copied to the DeviceList, in my case fourteen devices - that's why I got result == 14. Changed the test to (result < 0) and now I'm getting the whole list without problems.
The constructor of LibUSBException changes the errorCode sign, which makes the exception message to appear as USB Error: -14. The negative number led me to a wrong conclusion that there had been an error.Previous comment:
I can confirm this behavior on Fedora 33 (stock kernel 5.14.18-100.fc33.x86_64), OpenJDK Runtime Environment (build 1.8.0_312-b07), libusb version 1.0.24.11584, usb4java version 1.3.0 from Maven central. Even tried to compile the libusb4java.so from sources (successfully) and replace it within the classpath, but to no success. The error code returned by LibUSB.getDeviceList is -14 and the debugging output is[ 0.004276] [001d0eff] libusb: debug [libusb_get_device_list] [ 0.004286] [001d0eff] libusb: debug [discovered_devs_append] need to increase capacity Exception in thread "main" org.usb4java.LibUsbException: USB error -14: Other errorI succeeded to get the device list using the same libusb in a simple C program.
Environment:
OS: macOS Mojave version 10.14.6
openjdk version "12.0.2" 2019-07-16
OpenJDK Runtime Environment (build 12.0.2+10)
OpenJDK 64-Bit Server VM (build 12.0.2+10, mixed mode, sharing)
Macintoshs-MacBook-Air:HegFrontSite macintoshhd$
usb4java version 1.3.0
Bug description
Error when i tried to call
LibUsb.getDeviceList(null, myList);I get error from compiler
Reproduction
Expected behavior
It should return me with device list.