RK 默认root

一.默认root

1. adb shell 默认root
在build/core/main.mk下将ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=1
改成ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=0
2.挂载分区device ockchip k3399fstab.rk30board.bootmode.emmc
system 由 ro 改成 rw

二.补丁

diff --git a/build/core/main.mk b/build/core/main.mk
index a6b2544..98d0549 100755
--- a/build/core/main.mk
+++ b/build/core/main.mk
@@ -393,7 +393,7 @@ enable_target_debugging := true
 tags_to_install :=
 ifneq (,$(user_variant))
   # Target is secure in user builds.
-  ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=1
+  ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=0
   ADDITIONAL_DEFAULT_PROPERTIES += security.perf_harden=1
 
   ifeq ($(user_variant),user)
diff --git a/device/rockchip/rk3399/fstab.rk30board.bootmode.emmc b/device/rockchip/rk3399/fstab.rk30board.bootmode.emmc
index 8668a0f..b40ba17 100755
--- a/device/rockchip/rk3399/fstab.rk30board.bootmode.emmc
+++ b/device/rockchip/rk3399/fstab.rk30board.bootmode.emmc
@@ -3,7 +3,7 @@
 # The filesystem that contains the filesystem checker binary (typically /system) cannot
 # specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK
 
-/dev/block/platform/fe330000.sdhci/by-name/system         /system             ext4      ro,noatime,nodiratime,noauto_da_alloc                                  wait,resize
+/dev/block/platform/fe330000.sdhci/by-name/system         /system             ext4      rw,noatime,nodiratime,noauto_da_alloc                                  wait,resize
 # use this line below instead to enable verity
 #/dev/block/platform/fe330000.sdhci/by-name/system         /system             ext4      ro,noatime,nodiratime,noauto_da_alloc                                  wait,check,verify
 /dev/block/platform/fe330000.sdhci/by-name/cache          /cache              ext4      noatime,nodiratime,nosuid,nodev,noauto_da_alloc,discard                wait,check