Chris Dickens 4d5df70911 linux_usbfs: libusb_init() should succeed if no devices are present
When using sysfs to scan for devices, libusb_init() will fail if there
are no USB devices present. There is no reason for this behavior, so
this commit modifies the logic to only return an error if one or more
devices are present but none could be successfully enumerated.

Closes #301

Signed-off-by: Chris Dickens <christopher.a.dickens@gmail.com>
2017-12-28 00:40:14 -08:00
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libusb

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libusb is a library for USB device access from Linux, Mac OS X, Windows, OpenBSD/NetBSD and Haiku userspace. It is written in C (Haiku backend in C++) and licensed under the GNU Lesser General Public License version 2.1 or, at your option, any later version (see COPYING).

libusb is abstracted internally in such a way that it can hopefully be ported to other operating systems. Please see the PORTING file for more information.

libusb homepage: http://libusb.info/

Developers will wish to consult the API documentation: http://api.libusb.info

Use the mailing list for questions, comments, etc: http://mailing-list.libusb.info

(Please use the mailing list rather than mailing developers directly)

S
Description
A cross-platform library to access USB devices
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