需求描述
将adb root模式默认开启
解决方案
system/core/adb/daemon/main.cpp
static bool should_drop_privileges() {
#if defined(ALLOW_ADBD_ROOT)char value[PROPERTY_VALUE_MAX];// The properties that affect `adb root` and `adb unroot` are ro.secure and// ro.debuggable. In this context the names don't make the expected behavior// particularly obvious.//// ro.debuggable:// Allowed to become root, but not necessarily the default. Set to 1 on// eng and userdebug builds.//// ro.secure:// Drop privileges by default. Set to 1 on userdebug and user builds.property_get("ro.secure", value, "1");bool ro_secure = (strcmp(value, "1") == 0);property_get("ro.debuggable", value, "");bool ro_debuggable = (strcmp(value, "1") == 0);// Drop privileges if ro.secure is set...bool drop = ro_secure;property_get("service.adb.root", value, "");bool adb_root = (strcmp(value, "1") == 0);bool adb_unroot = (strcmp(value, "0") == 0);// ... except "adb root" lets you keep privileges in a debuggable build.if (ro_debuggable && adb_root) {drop = false;}// ... and "adb unroot" lets you explicitly drop privileges.if (adb_unroot) {drop = true;}return drop;
#elsereturn true; // "adb root" not allowed, always drop privileges.
#endif // ALLOW_ADBD_ROOT
}
修改system/core/adb/daemon/main.cpp的should_drop_privileges()方法返回为false
修改build/core/main.mk,使ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=0
添加属性device/qcom/msm8953_64/system.prop，该属性会编译到root/default.prop
ro.secure=0
ro.adb.secure=0
ro.duebuggbale=1
