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BTHCID(8) NetBSD System Manager's Manual BTHCID(8)
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bthcid -- Bluetooth Link Key/PIN Code Manager
bthcid [-fn] [-d device] [-m mode] [-s socket_name]
The bthcid daemon handles Link Key and PIN code requests for Bluetooth
devices. It opens a raw HCI socket and listens for the following HCI
Link_Key_Request bthcid scans the /var/db/bthcid.keys file for a
cached link key matching the remote device
BD_ADDR and, if found, the
Link_Key_Request_Reply will be sent back to the
device, otherwise the
Link_Key_Request_Negative_Reply will be sent.
Link_Key_Notification When a new link key is created by the device,
it will be cached for future use in the
/var/db/bthcid.keys link keys file, which will
be created if it does not already exist.
PIN_Code_Request The bthcid daemon checks its PIN cache for a
matching remote device entry. If no PIN is
found, the bthcid daemon will send a message to
any PIN clients that have registered, with the
device details and a timeout value. When no
clients are available or the timeout has
expired, bthcid will send a
PIN_Code_Request_Negative_Reply back to the
device. When a PIN is found, or if a client
responds within the timeout period, a
PIN_Code_Request_Reply will be sent back to the
PINs received from clients will be cached for 5
minutes until used, and may be added to the
cache prior to pairing with the btpin(1) util-
Some of the functionality of bthcid can be handled by the Bluetooth con-
troller directly, and cached Link Keys may be examined, deleted or moved
to device storage using the btkey(1) program.
The command line options are as follows:
-d device Specify the local Bluetooth device address. The default
-f Run in foreground (do not detach).
-h Display usage message and exit.
-m Specify the file mode access bits for the PIN client
socket. The default is to allow readwrite access to user
and group (0660).
-n Do not listen for PIN clients.
-s socket_name Specify the socket name to listen on for PIN clients.
The default path is /var/run/bthcid.
btkey(1), btpin(1), bluetooth(4), btconfig(8)
The bthcid daemon first appeared in FreeBSD 5.3 as hcsecd. It was ported
to NetBSD 4.0 with its present name and extended to support PIN clients
by Iain Hibbert under the sponsorship of Itronix, Inc.
Maksim Yevmenkin <firstname.lastname@example.org>
NetBSD 9.99 September 29, 2006 NetBSD 9.99