From a95f55c3ef657411f92c0c00a2e23ceb1d52b851 Mon Sep 17 00:00:00 2001
From: Dees_Troy <dees_troy@teamw.in>
Date: Sat, 17 Aug 2013 13:14:43 +0000
Subject: Add SELinux support

Change-Id: I11e1a3d018d921d96ba08915925b14bf633be6ed
---
 Android.mk          | 13 +++++++++----
 partition.cpp       | 20 +++++++++++++++++++-
 prebuilt/Android.mk |  4 +++-
 twrp.cpp            | 16 ++++++++++++++++
 4 files changed, 47 insertions(+), 6 deletions(-)

diff --git a/Android.mk b/Android.mk
index da06b9a60..a6a82ef26 100644
--- a/Android.mk
+++ b/Android.mk
@@ -56,7 +56,7 @@ LOCAL_STATIC_LIBRARIES :=
 LOCAL_SHARED_LIBRARIES :=
 
 LOCAL_STATIC_LIBRARIES += libcrecovery libguitwrp
-LOCAL_SHARED_LIBRARIES += libz libc libstlport libcutils libstdc++ libext4_utils libtar libblkid libminuitwrp libminadbd libmtdutils libminzip libaosprecovery
+LOCAL_SHARED_LIBRARIES += libz libc libstlport libcutils libstdc++ libtar libblkid libminuitwrp libminadbd libmtdutils libminzip libaosprecovery
 
 ifneq ($(wildcard system/core/libsparse/Android.mk),)
 LOCAL_SHARED_LIBRARIES += libsparse
@@ -65,9 +65,9 @@ endif
 ifeq ($(TARGET_USERIMAGES_USE_EXT4), true)
     LOCAL_CFLAGS += -DUSE_EXT4
     LOCAL_C_INCLUDES += system/extras/ext4_utils
-    #LOCAL_STATIC_LIBRARIES += libext4_utils
+    LOCAL_SHARED_LIBRARIES += libext4_utils
 endif
-
+LOCAL_C_INCLUDES += external/libselinux/include
 ifeq ($(HAVE_SELINUX), true)
   #LOCAL_C_INCLUDES += external/libselinux/include
   #LOCAL_STATIC_LIBRARIES += libselinux
@@ -75,8 +75,13 @@ ifeq ($(HAVE_SELINUX), true)
 endif # HAVE_SELINUX
 ifneq ($(wildcard external/libselinux/Android.mk),)
     LOCAL_C_INCLUDES += external/libselinux/include
-    LOCAL_STATIC_LIBRARIES += libselinux
+    LOCAL_SHARED_LIBRARIES += libselinux
     LOCAL_CFLAGS += -DHAVE_SELINUX -g
+    ifneq ($(TARGET_USERIMAGES_USE_EXT4), true)
+        LOCAL_CFLAGS += -DUSE_EXT4
+        LOCAL_C_INCLUDES += system/extras/ext4_utils
+        LOCAL_SHARED_LIBRARIES += libext4_utils
+    endif
 endif
 
 # This binary is in the recovery ramdisk, which is otherwise a copy of root.
diff --git a/partition.cpp b/partition.cpp
index f81748d72..dc71bb9a4 100644
--- a/partition.cpp
+++ b/partition.cpp
@@ -49,10 +49,15 @@ extern "C" {
 #ifdef TW_INCLUDE_CRYPTO_SAMSUNG
 	#include "crypto/libcrypt_samsung/include/libcrypt_samsung.h"
 #endif
+#ifdef USE_EXT4
+	#include "make_ext4fs.h"
+#endif
 }
 
 using namespace std;
 
+extern struct selabel_handle *selinux_handle;
+
 TWPartition::TWPartition(void) {
 	Can_Be_Mounted = false;
 	Can_Be_Wiped = false;
@@ -1257,6 +1262,19 @@ bool TWPartition::Wipe_EXT4() {
 	if (!UnMount(true))
 		return false;
 
+#ifdef USE_EXT4
+	gui_print("Formatting %s using make_ext4fs function.\n", Display_Name.c_str());
+#ifdef HAVE_SELINUX
+	if (make_ext4fs(Actual_Block_Device.c_str(), Length, Mount_Point.c_str(), selinux_handle) != 0) {
+#else
+	if (make_ext4fs(Actual_Block_Device.c_str(), Length) != 0) {
+#endif
+		LOGERR("Unable to wipe '%s' using function call.\n", Mount_Point.c_str());
+		return false;
+	} else {
+		return true;
+	}
+#else
 	if (TWFunc::Path_Exists("/sbin/make_ext4fs")) {
 		string Command, result;
 
@@ -1283,7 +1301,7 @@ bool TWPartition::Wipe_EXT4() {
 		}
 	} else
 		return Wipe_EXT23("ext4");
-
+#endif
 	return false;
 }
 
diff --git a/prebuilt/Android.mk b/prebuilt/Android.mk
index e31ec8e31..74923a050 100644
--- a/prebuilt/Android.mk
+++ b/prebuilt/Android.mk
@@ -46,7 +46,9 @@ RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libbmlutils.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libflashutils.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libstlport.so
 #RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libmincrypt.so
-RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libext4_utils.so
+ifeq ($(TARGET_USERIMAGES_USE_EXT4), true)
+    RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libext4_utils.so
+endif
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libaosprecovery.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libjpeg.so
 ifneq ($(wildcard external/libselinux/Android.mk),)
diff --git a/twrp.cpp b/twrp.cpp
index bc3ce7b6d..04851aaf1 100644
--- a/twrp.cpp
+++ b/twrp.cpp
@@ -46,6 +46,11 @@ extern "C" {
 #include "openrecoveryscript.hpp"
 #include "variables.h"
 
+#ifdef HAVE_SELINUX
+#include "selinux/label.h"
+struct selabel_handle *selinux_handle;
+#endif
+
 TWPartitionManager PartitionManager;
 int Log_Offset;
 
@@ -90,6 +95,17 @@ int main(int argc, char **argv) {
 	// Load up all the resources
 	gui_loadResources();
 
+#ifdef HAVE_SELINUX
+	struct selinux_opt selinux_options[] = {
+		{ SELABEL_OPT_PATH, "/file_contexts" }
+	};
+    selinux_handle = selabel_open(SELABEL_CTX_FILE, selinux_options, 1);
+	if (!selinux_handle)
+		printf("No file contexts for SELinux\n");
+	else
+		printf("SELinux contexts loaded from /file_contexts\n");
+#endif
+
 	PartitionManager.Mount_By_Path("/cache", true);
 
 	string Zip_File, Reboot_Value;
-- 
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