From 38b68c6a0e4810b188ac875733d8f480d5e2cf8f Mon Sep 17 00:00:00 2001
From: Yi-Yo Chiang <yochiang@google.com>
Date: Tue, 22 Nov 2022 17:32:21 +0800
Subject: [PATCH] fastbootd: Add getvar is-force-debuggable

Export ro.force.debuggable property so that the user can check image
compatibility prior to running fastboot flash.
For example, if is-force-debuggable is yes, then the "system" and
"vendor" build fingerprint must match.

Bug: 191649082
Test: fastboot getvar is-force-debuggable
Change-Id: I772d98253f58ba208d5803e18b589ff693deebd0
---
 fastboot/constants.h          | 1 +
 fastboot/device/commands.cpp  | 1 +
 fastboot/device/variables.cpp | 6 ++++++
 fastboot/device/variables.h   | 2 ++
 4 files changed, 10 insertions(+)

diff --git a/fastboot/constants.h b/fastboot/constants.h
index f6fc74eda..ad169d1dc 100644
--- a/fastboot/constants.h
+++ b/fastboot/constants.h
@@ -64,6 +64,7 @@
 #define FB_VAR_SLOT_UNBOOTABLE "slot-unbootable"
 #define FB_VAR_IS_LOGICAL "is-logical"
 #define FB_VAR_IS_USERSPACE "is-userspace"
+#define FB_VAR_IS_FORCE_DEBUGGABLE "is-force-debuggable"
 #define FB_VAR_HW_REVISION "hw-revision"
 #define FB_VAR_VARIANT "variant"
 #define FB_VAR_OFF_MODE_CHARGE_STATE "off-mode-charge"
diff --git a/fastboot/device/commands.cpp b/fastboot/device/commands.cpp
index f8befd3b8..e929f42c2 100644
--- a/fastboot/device/commands.cpp
+++ b/fastboot/device/commands.cpp
@@ -131,6 +131,7 @@ const std::unordered_map<std::string, VariableHandlers> kVariableMap = {
         {FB_VAR_PARTITION_TYPE, {GetPartitionType, GetAllPartitionArgsWithSlot}},
         {FB_VAR_IS_LOGICAL, {GetPartitionIsLogical, GetAllPartitionArgsWithSlot}},
         {FB_VAR_IS_USERSPACE, {GetIsUserspace, nullptr}},
+        {FB_VAR_IS_FORCE_DEBUGGABLE, {GetIsForceDebuggable, nullptr}},
         {FB_VAR_OFF_MODE_CHARGE_STATE, {GetOffModeChargeState, nullptr}},
         {FB_VAR_BATTERY_VOLTAGE, {GetBatteryVoltage, nullptr}},
         {FB_VAR_BATTERY_SOC_OK, {GetBatterySoCOk, nullptr}},
diff --git a/fastboot/device/variables.cpp b/fastboot/device/variables.cpp
index 5f99656a1..d2a794715 100644
--- a/fastboot/device/variables.cpp
+++ b/fastboot/device/variables.cpp
@@ -379,6 +379,12 @@ bool GetIsUserspace(FastbootDevice* /* device */, const std::vector<std::string>
     return true;
 }
 
+bool GetIsForceDebuggable(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                          std::string* message) {
+    *message = android::base::GetBoolProperty("ro.force.debuggable", false) ? "yes" : "no";
+    return true;
+}
+
 std::vector<std::vector<std::string>> GetAllPartitionArgsWithSlot(FastbootDevice* device) {
     std::vector<std::vector<std::string>> args;
     auto partitions = ListPartitions(device);
diff --git a/fastboot/device/variables.h b/fastboot/device/variables.h
index aa4d9fc40..3b2d48447 100644
--- a/fastboot/device/variables.h
+++ b/fastboot/device/variables.h
@@ -54,6 +54,8 @@ bool GetPartitionIsLogical(FastbootDevice* device, const std::vector<std::string
                            std::string* message);
 bool GetIsUserspace(FastbootDevice* device, const std::vector<std::string>& args,
                     std::string* message);
+bool GetIsForceDebuggable(FastbootDevice* device, const std::vector<std::string>& args,
+                          std::string* message);
 bool GetHardwareRevision(FastbootDevice* device, const std::vector<std::string>& args,
                          std::string* message);
 bool GetVariant(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);