CODEWITHSUNDEEP
clinuxlibusb
Frotz
Frotz

Reputation: 592

libusb_get_device_descriptor() always returns 0. How do I detect failure?

Prior to version 1.0.16 of libusb, libusb_get_device_descriptor() would return 0 for success or a negative integer to indicate failure. With version 1.0.16 and later, this function always returns 0. How do I detect and figure out why I fail to get a descriptor now that that convenient means of figuring it out is gone?

Upvotes: 0

Views: 606

Answers (1)

Alex Skalozub
Alex Skalozub

Reputation: 2576

Documentation explicitly states that

Note since libusb-1.0.16, LIBUSB_API_VERSION >= 0x01000102, this function always succeeds.

This means you should never fail to get descriptor.

Upvotes: 1

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