BOOTCLASSPATH

最新推荐文章于 2025-01-02 10:44:28 发布

原创最新推荐文章于 2025-01-02 10:44:28 发布 · 550 阅读

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本文详细介绍了如何在Android系统中初始化系统属性，包括Boot Class Path和Class Path的获取，以及环境变量的设置。

libcore/luni/src/main/java/java/lang/System.java

private static void initSystemProperties() {

VMRuntime runtime = VMRuntime.getRuntime();

Properties p = new Properties();

String projectUrl = "http://www.android.com/";

String projectName = "The Android Project";

p.put("java.boot.class.path", runtime.bootClassPath());

p.put("java.class.path", runtime.classPath());

system/core/rootdir/init.environ.rc.in:

# set up the global environment

on init

export PATH /sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin

export LD_LIBRARY_PATH /vendor/lib:/system/lib

export ANDROID_BOOTLOGO 1

export ANDROID_ROOT /system

export ANDROID_ASSETS /system/app

export ANDROID_DATA /data

export ANDROID_STORAGE /storage

export ASEC_MOUNTPOINT /mnt/asec

export LOOP_MOUNTPOINT /mnt/obb

export BOOTCLASSPATH %BOOTCLASSPATH%

system/core/rootdir/Android.mk:

include $(CLEAR_VARS)

LOCAL_MODULE_CLASS := ETC

LOCAL_MODULE := init.environ.rc

LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)

# Put it here instead of in init.rc module definition,

# because init.rc is conditionally included.

# create some directories (some are mount points)

LOCAL_POST_INSTALL_CMD := mkdir -p $(addprefix $(TARGET_ROOT_OUT)/, \

sbin dev proc sys system data \

backup)

include $(BUILD_SYSTEM)/base_rules.mk

$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/init.environ.rc.in

@echo "Generate: $< -> $@"

@mkdir -p $(dir $@)

$(hide) sed -e 's?%BOOTCLASSPATH%?$(PRODUCT_BOOTCLASSPATH)?g' $< >$@

build/core/dex_preopt.mk:

DEXPREOPT_BOOT_JARS := $(PRODUCT_BOOT_JARS)

DEXPREOPT_BOOT_JARS_MODULES := $(subst :, ,$(DEXPREOPT_BOOT_JARS))

PRODUCT_BOOTCLASSPATH := $(subst $(space),:,$(foreach m,$(DEXPREOPT_BOOT_JARS_MODULES),/system/framework/$(m).jar))

build/target/product/core_base.mk:

$(call inherit-product, $(SRC_TARGET_DIR)/product/core_minimal.mk)

# Override the PRODUCT_BOOT_JARS set in core_minimal.mk

PRODUCT_BOOT_JARS := core:conscrypt:okhttp:core-junit:bouncycastle:ext:framework:framework2:telephony-common:voip-common:mms-common:android.policy:services:apache-xml:webviewchromium

after compile, in out :

out/target/product/xxx $ grep -irsn BOOTCLASSPATH .

./root/init.environ.rc:12: export BOOTCLASSPATH /system/framework/core.jar:/system/framework/conscrypt.jar:/system/framework/okhttp.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/framework2.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/mms-common.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar:/system/framework/webviewchromium.jar

./obj/ETC/init.environ.rc_intermediates/init.environ.rc:12: export BOOTCLASSPATH /system/framework/core.jar:/system/framework/conscrypt.jar:/system/framework/okhttp.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/framework2.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/mms-common.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar:/system/framework/webviewchromium.jar

Can use $BOOTCLASSPATH in anroid command line to see what BOOTCLASSPATH is .