Beyond Linux® From Scratch (systemd edition) - Version 8.4

Chapter 12. System Utilities

BlueZ-5.50

Introduction to BlueZ

The BlueZ package contains the Bluetooth protocol stack for Linux.

This package is known to build and work properly using an LFS-8.4 platform.

Package Information

BlueZ Dependencies

Required

dbus-1.12.12, GLib-2.58.3, and libical-3.0.4

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/bluez

Kernel Configuration

If you are building this package to use bluetooth devices (rather than as a build dependency), enable the following options in the kernel configuration, also the options below the next paragraph if you intend to run the tests, and recompile the kernel if necessary: 

[*] Networking support --->                [CONFIG_NET]
  </M> Bluetooth subsystem support --->    [CONFIG_BT]
    <*/M> RFCOMM protocol support          [CONFIG_BT_RFCOMM]
    [*]   RFCOMM TTY support               [CONFIG_BT_RFCOMM_TTY]
    <*/M> BNEP protocol support            [CONFIG_BT_BNEP]
    [*]   Multicast filter support         [CONFIG_BT_BNEP_MC_FILTER]
    [*]   Protocol filter support          [CONFIG_BT_BNEP_PROTO_FILTER]
    <*/M> HIDP protocol support            [CONFIG_BT_HIDP]
        Bluetooth device drivers --->
          (Select the appropriate drivers for your Bluetooth hardware)

  <*/M> RF switch subsystem support --->   [CONFIG_RFKILL]

If you wish to run the testsuite (even if treating this package as a build dependency), you will need to enable the following options in the kernel configuration and recompile the kernel if necessary: 

[*] Networking support --->                                     [CONFIG_NET]
-*- Cryptographic API --->                                      [CONFIG_CRYPTO]
  </M> User-space interface for hash algorithms                 [CONFIG_CRYPTO_USER_API_HASH]
  </M> User-space interface for symmetric key cipher algorithms [CONFIG_CRYPTO_USER_API_SKCIPHER]

Installation of BlueZ

Install BlueZ by running the following commands: 

./configure --prefix=/usr         \
            --sysconfdir=/etc     \
            --localstatedir=/var  \
            --enable-library      &&
make

To test the results, issue: make check.

Now, as the root user: 

make install &&
ln -svf ../libexec/bluetooth/bluetoothd /usr/sbin

Install the main configuration file as the root user: 

install -v -dm755 /etc/bluetooth &&
install -v -m644 src/main.conf /etc/bluetooth/main.conf

If desired, install the API documentation as the root user: 

install -v -dm755 /usr/share/doc/bluez-5.50 &&
install -v -m644 doc/*.txt /usr/share/doc/bluez-5.50

Command Explanations

--enable-library: This switch enables building the BlueZ 4 compatibility library which is required by some applications.

ln -svf ../libexec/bluetooth/bluetoothd /usr/sbin: This command makes access to the bluetooth daemon more convenient.

Configuring BlueZ

Configuration Files

/etc/bluetooth/main.conf is installed automatically during the install. Additionally, there are three supplementary configuration files. /etc/sysconfig/bluetooth is installed as a part of the boot script below. In addition, you optionally can install the following, as the root user: 

cat > /etc/bluetooth/rfcomm.conf << "EOF"
# Start rfcomm.conf
# Set up the RFCOMM configuration of the Bluetooth subsystem in the Linux kernel.
# Use one line per command
# See the rfcomm man page for options


# End of rfcomm.conf
EOF

cat > /etc/bluetooth/uart.conf << "EOF"
# Start uart.conf
# Attach serial devices via UART HCI to BlueZ stack
# Use one line per device
# See the hciattach man page for options

# End of uart.conf
EOF

Systemd Bluez Services

To start the bluetoothd daemon at boot, enable the previously installed systemd unit by running the following command as the root user: 

systemctl enable bluetooth

To start the obexd daemon for a user session (to support some Bluetooth programs using it), enable the previously installed systemd unit for all users by running the following command as the root user: 

systemctl enable --global obex
[Note]

Note

Systemd will start the Bluetooth daemon only when a bluetooth device is detected on the system.

Contents

Installed Programs: bccmd, bluemoon, bluetoothctl, bluetoothd (symlink), btattach, btmon, hex2hcd, l2ping, l2test, mpris-proxy, and rctest
Installed Library: libbluetooth.so
Installed Directories: /etc/bluetooth, /usr/{include,libexec}/bluetooth, and /usr/share/doc/bluez-5.50

Short Descriptions

bccmd

is used to issue BlueCore commands to Cambridge Silicon Radio devices.

bluemoon

is a Bluemoon configuration utility.

bluetoothctl

is the interactive Bluetooth control program.

bluetoothd

is the Bluetooth daemon.

btmon

provides access to the Bluetooth subsystem monitor infrastructure for reading HCI traces.

hex2hcd

is used to convert a file needed by Broadcom devices to hcd (Broadcom bluetooth firmware) format.

l2ping

is used to send a L2CAP echo request to the Bluetooth MAC address given in dotted hex notation.

l2test

is a L2CAP testing program.

rctest

is used to test RFCOMM communications on the Bluetooth stack.

libbluetooth.so

contains the BlueZ 4 API functions.

Last updated on 2019-02-17 13:55:58 -0800