unbreak USB printing on OpenBSD

[michaelrsweet]

Version: 2.0.1
CUPS.org User: ajacoutot

Hi.

On OpenBSD, 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 on at least OpenBSD.

[michaelrsweet]

CUPS.org User: mike

Fixed in Subversion repository.

[michaelrsweet]

"backend_usb-libusb_c.patch":

--- backend/usb-libusb.c.orig Fri Feb 14 21:09:01 2014
+++ backend/usb-libusb.c Fri Oct 3 15:35:39 2014
@@ -1451,9 +1451,14 @@ open_device(usb_printer_t printer, / I - Printer */
else
{
printer->usblp_attached = 0;

• fprintf(stderr, "DEBUG: Failed to check whether %04x:%04x has the "usblp" kernel module attached\n",

•     devdesc.idVendor, devdesc.idProduct);
  

• goto error;

• if (errcode != LIBUSB_ERROR_NOT_SUPPORTED)
• {

•  fprintf(stderr,
  

•          "DEBUG: Failed to check whether %04x:%04x has the \"usblp\" "
  

•          "kernel module attached\n", devdesc.idVendor, devdesc.idProduct);
  

•  goto error;
  

• }
  }

/*