[FAQ04776] 사용자 버전 debug 옵션을 기본적으로 열고 adb 연결을 기본적으로 여는 방법

[Description]
사용자 버전의 USB debug 옵션을 기본적으로 열고 adb 연결을 기본적으로 여는 방법
[Keyword]
양산 버전 user usb debug root adb 연결
[Solution] 1. android4.0 이전에 이 설정은 프레임워크/베이스/서비스/.../SystemServer.java에 설정하면 시스템property의persist에 따라service.adb.enable에서 설정합니다.코드와 유사하게 볼 수 있습니다.

       // make sure the ADB_ENABLED setting value matches the secure property value
       Settings.Secure.putInt(mContentResolver, Settings.Secure.ADB_ENABLED,
               "1".equals(SystemProperties.get("persist.service.adb.enable")) ? 1 : 0);
       // register observer to listen for settings changes
       mContentResolver.registerContentObserver(Settings.Secure.getUriFor(Settings.Secu
re.ADB_ENABLED),false, new AdbSettingsObserver());

   
이persist.service.adb.enable 기본값은default에 있습니다.prop에서 컴파일할 때
build/core/main.mk 중 확인,

ifeq (true,$(strip $(enable_target_debugging)))
  # Target is more debuggable and adbd is on by default
  ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=1 persist.service.adb.enable=1
  # Include the debugging/testing OTA keys in this build.
  INCLUDE_TEST_OTA_KEYS := true
else # !enable_target_debugging
  # Target is less debuggable and adbd is off by default
  ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=0 persist.service.adb.enable=0
endif # !enable_target_debugging

다음을 ADDITIONALDEFAULT_PROPERTIES += ro.debuggable=0
persist.service.adb.enable=0으로 변경
ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=1 persist.service.adb.enable=1
2.android4.0 이후adb의 제어로persist를 통일적으로 사용했습니다.sys.usb.config가 제어하기 때문에 대응하는 설정점도 프레임워크/베이스/서비스/.../로 변경되었습니다.usb/UsbDeviceManager.java에서도 다음과 같은 유사한 코드를 볼 수 있습니다.

public  UsbHandler(Looper looper) {
       // persist.sys.usb.config should never be unset.  But if it is, set it to "adb"
       // so we have a chance of debugging what happened.
        mDefaultFunctions = SystemProperties.get("persist.sys.usb.config", "adb");
       // sanity check the sys.usb.config system property
       // this may be necessary if we crashed while switching USB configurations
       String config = SystemProperties.get("sys.usb.config", "none");
       if (!config.equals(mDefaultFunctions)) {
           Slog.w(TAG, "resetting config to persistent property: " + mDefaultFunctions);
           SystemProperties.set("sys.usb.config", mDefaultFunctions);
       }
       mCurrentFunctions = mDefaultFunctions;
       String state = FileUtils.readTextFile(new File(STATE_PATH), 0, null).trim();
       updateState(state);
       mAdbEnabled = containsFunction(mCurrentFunctions, UsbManager.USB_FUNCTION_ADB);
public void  systemReady() {
// make sure the ADB_ENABLED setting value matches the current state
   Settings.Secure.putInt(mContentResolver, Settings.Secure.ADB_ENABLED, mAdbEnabled ?
1 : 0);

이persist.sys.usb.config에서adb의 설정은alps/build/tools/postprocess_props.py중
로.debuggable = 1 or 0으로 설정하고 1은adb를 켜고 0은adb debug를 닫습니다.이것
ro.debuggable도alps/build/core/main에 있습니다.mk에서 설정, 2.3 수정과 유사
그러나 이렇게 열면 사용자 버전adb 셸에 대한 루트 권한이 아니라 셸 권한이 열립니다.
루트 권한이 필요합니다. 시스템/core/adb/adb를 다시 고쳐야 합니다.c안의 shoulddrop_privileges () 이거
함수, #ifndef ALLOWADBD_ROOT 시 return 0;리턴 1이 아니라됐습니다.
---------------------------------------------------------------------------------------
1. 컴파일 명령에 따라 ro를 확정한다.debuggable
build/core/main.mk

## user/userdebug ##

user_variant := $(filter user userdebug,$(TARGET_BUILD_VARIANT))
enable_target_debugging := true
tags_to_install :=
ifneq (,$(user_variant))
  # Target is secure in user builds.
  ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=1

  ifeq ($(user_variant),userdebug)
    # Pick up some extra useful tools
    tags_to_install += debug

    # Enable Dalvik lock contention logging for userdebug builds.
    ADDITIONAL_BUILD_PROPERTIES += dalvik.vm.lockprof.threshold=500
  else
    # Disable debugging in plain user builds.
    enable_target_debugging :=
  endif

  # enable dex pre-optimization for all TARGET projects in default to 
  # speed up device first boot-up
  #add by yanqi.liu for costomization @{
  ifneq ($(JRD_IS_GOAL_PERSO),true)
     WITH_DEXPREOPT := true
  endif
#}
  # Turn on Dalvik preoptimization for user builds, but only if not
  # explicitly disabled and the build is running on Linux (since host
  # Dalvik isn't built for non-Linux hosts).
  ifneq (true,$(DISABLE_DEXPREOPT))
    ifeq ($(user_variant),user)
      ifeq ($(HOST_OS),linux)
        ifneq ($(JRD_IS_GOAL_PERSO),true)
           WITH_DEXPREOPT := true
        endif
      endif
    endif
  endif

  # Disallow mock locations by default for user builds
  ADDITIONAL_DEFAULT_PROPERTIES += ro.allow.mock.location=0

else # !user_variant
  # Turn on checkjni for non-user builds.
  # Kirby: turn off it temporarily to gain performance {
  # ADDITIONAL_BUILD_PROPERTIES += ro.kernel.android.checkjni=1
#  ADDITIONAL_BUILD_PROPERTIES += ro.kernel.android.checkjni=0
  # } Kirby
  # Set device insecure for non-user builds.
  ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=0
  # Allow mock locations by default for non user builds
  ADDITIONAL_DEFAULT_PROPERTIES += ro.allow.mock.location=1
endif # !user_variant


# always enable aed
ADDITIONAL_DEFAULT_PROPERTIES += persist.mtk.aee.aed=on

# Turn on Jazz AOT by default if not explicitly disabled and the build
# is running on Linux (since host Dalvik isn't built for non-Linux hosts).
ifneq (true,$(DISABLE_JAZZ))
  ifeq ($(strip $(MTK_JAZZ)),yes)
    ifeq ($(HOST_OS),linux)
      # Build host dalvikvm which Jazz AOT relies on.
      WITH_HOST_DALVIK := true
      WITH_JAZZ := true
    endif
  endif
endif

ifeq (true,$(strip $(enable_target_debugging)))
  # Target is more debuggable and adbd is on by default
  ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=1
  ADDITIONAL_DEFAULT_PROPERTIES += ro.adb.secure=0
  # Include the debugging/testing OTA keys in this build.
  INCLUDE_TEST_OTA_KEYS := true
else # !enable_target_debugging
  # Target is less debuggable and adbd is off by default
  ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=0
  ADDITIONAL_DEFAULT_PROPERTIES += ro.adb.secure=1
endif # !enable_target_debugging

2. 기본 usb 기능 확인
build/tools/post_process_props.py

# Put the modifications that you need to make into the /system/build.prop into this
# function. The prop object has get(name) and put(name,value) methods.
def mangle_build_prop(prop):
  #pass
  #If ro.mmitest is true, then disable MTP, add mass_storage for default
  if prop.get("ro.mmitest") == "true":
    prop.put("persist.sys.usb.config", "mass_storage")

  # If ro.debuggable is 1, then enable adb on USB by default
  # (this is for userdebug builds)
  if prop.get("ro.build.type") == "eng":
    val = prop.get("persist.sys.usb.config").strip('\r
')
    if val == "":
      val = "adb"
    else:
      val = val + ",adb"
    prop.put("persist.sys.usb.config", val)
  # UsbDeviceManager expects a value here.  If it doesn't get it, it will
  # default to "adb". That might not the right policy there, but it's better
  # to be explicit.
  if not prop.get("persist.sys.usb.config"):
    prop.put("persist.sys.usb.config", "none");


# Put the modifications that you need to make into the /system/build.prop into this
# function. The prop object has get(name) and put(name,value) methods.
def mangle_default_prop(prop):
  # If ro.debuggable is 1, then enable adb on USB by default
  # (this is for userdebug builds)
  if prop.get("ro.debuggable") == "1":
    val = prop.get("persist.sys.usb.config")
    if val == "":
      val = "adb"
    else:
      val = val + ",adb"
    prop.put("persist.sys.usb.config", val)
  # UsbDeviceManager expects a value here.  If it doesn't get it, it will
  # default to "adb". That might not the right policy there, but it's better
  # to be explicit.
  if not prop.get("persist.sys.usb.config"):
    prop.put("persist.sys.usb.config", "none");