system service feature enable/disable in android 5

ethernet service:

./services/java/com/android/server/SystemServer.java:674:                if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_ETHERNET)) {

    private void startOtherServices() {
        ...
        ...
                if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_ETHERNET)) {
                    mSystemServiceManager.startService(ETHERNET_SERVICE_CLASS);
                }

茶一下 FEATURE_ETHERNET...

./core/java/android/content/pm/PackageManager.java:1570:    public static final String FEATURE_ETHERNET = "android.hardware.ethernet";

這個： android.hardware.ethernet 是在：

frameworks/native/data/etc/android.hardware.ethernet.xml:

<permissions>
    <feature name="android.hardware.ethernet" />
</permissions>

這個 file 是被copy ...

device/fsl/imx6/sabreauto_6q.mk:

PRODUCT_COPY_FILES += \
        frameworks/native/data/etc/android.hardware.audio.output.xml:system/etc/permissions/android.hardware.audio.output.xml \
        frameworks/native/data/etc/android.hardware.sensor.compass.xml:system/etc/permissions/android.hardware.sensor.compass.xml \
        ....
        ...
        frameworks/native/data/etc/android.hardware.ethernet.xml:system/etc/permissions/android.hardware.ethernet.xml \

把這行刪掉以後，ethernet service 就不會起來了。