[cups.bugs] [HIGH] STR #4088: libusb_kernel_driver_active may may return unsupported

[Antoine Jacoutot]

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[STR New]

Hi.

On OpenBSD (but I guess other BSDs may have the same issue), the
libusb_kernel_* functions return LIBUSB_ERROR_NOT_SUPPORTED because there
is no implementation for it (also "usblp" is a Linux thing).

The following patch adds a check to open_device() that catches
LIBUSB_ERROR_NOT_SUPPORTED and continues with a warning assuming that the
kernel hasn't attached the device so that libusb is used.
This allows my USB printers to work with version 1.5.3.

Link: http://www.cups.org/str.php?L4088
Version: 1.5.3
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