Hi there!

The bluez-libs functions hci_for_each_dev(), hci_devinfo() and
hci_inquiry() don't save the 'errno' value when an error occurs.
This causes the value of 'errno' to be overwrinting on some kind
of errors.

The attached patch fixes it. Note that was necessary to change
hci_inquiry() a bit, and I've added the missing error code to 'errno'
when a device is not found by hci_for_each_dev(), it fixes things like
that:

~/ hcitool scan
Device is not available: Success
~/ 

src/hci.c |   70 ++++++++++++++++++++++++++++++++++++--------------------------
1 files changed, 41 insertions(+), 29 deletions(-)

Thank you,

-- 
Luiz Fernando N. Capitulino