From 4549ce06a0caea6224cd4be56ecb5734a6681130 Mon Sep 17 00:00:00 2001
From: roynatech2544 <whiteshell2544@naver.com>
Date: Mon, 15 Nov 2021 02:07:21 +0900
Subject: [PATCH] universal7885: interfaces: use seteuid() to set fastcharge
 sysfs value

* SELinux denials
type=1400 audit(0.0:731): avc: denied { dac_override } for capability=1 scontext=u:r:hal_battery_default:s0 tcontext=u:r:hal_battery_default:s0 tclass=capability permissive=0

Change-Id: I500682520503e14594eb8661a97ebc0d199c77ff
Signed-off-by: roynatech2544 <whiteshell2544@naver.com>
---
 .../interfaces/hardware/battery/1.0/default/Battery.cpp     | 6 ++++++
 .../interfaces/hardware/battery/1.0/default/Battery.h       | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/universal7885-common/interfaces/hardware/battery/1.0/default/Battery.cpp b/universal7885-common/interfaces/hardware/battery/1.0/default/Battery.cpp
index 627379c..5b33778 100644
--- a/universal7885-common/interfaces/hardware/battery/1.0/default/Battery.cpp
+++ b/universal7885-common/interfaces/hardware/battery/1.0/default/Battery.cpp
@@ -16,6 +16,8 @@
 #include <iostream>
 #include <fstream>
 #include <sstream>
+#include <unistd.h>
+
 namespace vendor::eureka::hardware::battery::V1_0 {
 
 // Methods from ::android::hardware::battery::V1_0::IBattery follow.
@@ -61,6 +63,7 @@ Return<int32_t> Battery::getBatteryStats(battery::V1_0::SysfsType stats) {
 Return<int32_t> Battery::setBatteryWritable(battery::V1_0::SysfsType stats, battery::V1_0::Number value) {
         std::ofstream file;
         std::string filename;
+	bool FastCharge = false;
 	switch (stats){
 	   case SysfsType::CAPACITY_MAX:
 	      filename = "/sys/devices/platform/battery/power_supply/battery/charge_full";
@@ -76,6 +79,7 @@ Return<int32_t> Battery::setBatteryWritable(battery::V1_0::SysfsType stats, batt
 	      break;
 	   case SysfsType::FASTCHARGE:
 	      filename = "/sys/class/sec/switch/afc_disable";
+	      FastCharge = true;
 	      break;
 	   case SysfsType::CHARGE:
 	      filename = "/sys/devices/platform/battery/power_supply/battery/batt_slate_mode";
@@ -84,6 +88,7 @@ Return<int32_t> Battery::setBatteryWritable(battery::V1_0::SysfsType stats, batt
 	      filename = "";
 	      break;
 	}
+	if(FastCharge) seteuid(ANDROID_SYSTEM_UID);
         file.open(filename);
 	int write;
 	if (value == Number::ENABLE){
@@ -93,6 +98,7 @@ Return<int32_t> Battery::setBatteryWritable(battery::V1_0::SysfsType stats, batt
 	}
         file << write;
         file.close();
+        if(FastCharge) seteuid(ANDROID_ROOT_UID);
 	return 0;
 }
 
diff --git a/universal7885-common/interfaces/hardware/battery/1.0/default/Battery.h b/universal7885-common/interfaces/hardware/battery/1.0/default/Battery.h
index 5331afc..34daf76 100644
--- a/universal7885-common/interfaces/hardware/battery/1.0/default/Battery.h
+++ b/universal7885-common/interfaces/hardware/battery/1.0/default/Battery.h
@@ -18,6 +18,9 @@
 #include <hidl/MQDescriptor.h>
 #include <hidl/Status.h>
 
+#define ANDROID_SYSTEM_UID 1000
+#define ANDROID_ROOT_UID 0
+
 namespace vendor::eureka::hardware::battery::V1_0 {
 
 using ::android::hardware::hidl_array;