init进程中和bt相关的部分

#首先是创建了两个文件夹和bluetooth相关
    mkdir /data/misc/bluetoothd 0770 bluetooth bluetooth
mkdir /data/misc/bluetooth 0770 system system
#新建了一个dbus的service，dbus是用于bluez和jni层交互的
#细心的同学已经发了，他是没有disabled的，所以，会直接启动哦
#不过dbus只是一个通路而已，我们暂时并不准备去详细地分析
service dbus /system/bin/dbus-daemon --system --nofork
    class main
    socket dbus stream 660 bluetooth bluetooth
    user bluetooth
    group bluetooth net_bt_admin
#新建了bluetoothd的service，这个就是bluez了
service bluetoothd /system/bin/bluetoothd -n
    class main
    socket bluetooth stream 660 bluetooth bluetooth
    socket dbus_bluetooth stream 660 bluetooth bluetooth
    # init.rc does not yet support applying capabilities, so run as root and
    # let bluetoothd drop uid to bluetooth with the right linux capabilities
    group bluetooth net_bt_admin misc
    disabled
#这里就是各个文件的权限配置了
    chmod 666 /dev/ttyS0
    chmod 666 /proc/bluetooth/sleep/proto
    chmod 666 /sys/class/rfkill/rfkill0/state
    chmod 666 /sys/class/rfkill/rfkill0/type
    chown bluetooth bluetooth /sys/class/rfkill/rfkill0/state
    chown bluetooth bluetooth /sys/class/rfkill/rfkill0/type
#一个hciattach的service，hciattach是bluetooth的一个工具，这里可以用来启动蓝牙
#涉及到一些vendor的信息后面就写成***了
service hciattach /system/bin/logwrapper /system/bin/hciattach -n /dev/ttyS0 ***
    class main
    user bluetooth
    group bluetooth net_bt_admin
    disabled
    oneshot