Moar filesystem

include/fs/archive_system_save_data.hpp

@@ -6,7 +6,7 @@ class SystemSaveDataArchive : public ArchiveBase {
 	SystemSaveDataArchive(Memory& mem) : ArchiveBase(mem) {}
 
 	u64 getFreeBytes() override {
-		Helpers::panic("Unimplemented GetFreeBytes for SystemSaveData archive");
+		Helpers::warn("Unimplemented GetFreeBytes for SystemSaveData archive");
 		return 32_MB;
 	}
 
@@ -14,14 +14,10 @@ class SystemSaveDataArchive : public ArchiveBase {
 
 	//HorizonResult createDirectory(const FSPath& path) override;
 	HorizonResult createFile(const FSPath& path, u64 size) override;
-
-	HorizonResult deleteFile(const FSPath& path) override {
-		Helpers::panic("Unimplemented DeleteFile for SystemSaveData archive");
-		return Result::Success;
-	};
+	HorizonResult deleteFile(const FSPath& path) override;
 
 	Rust::Result<ArchiveBase*, HorizonResult> openArchive(const FSPath& path) override;
-	//Rust::Result<DirectorySession, HorizonResult> openDirectory(const FSPath& path) override;
+	Rust::Result<DirectorySession, HorizonResult> openDirectory(const FSPath& path) override;
 
 	FileDescriptor openFile(const FSPath& path, const FilePerms& perms) override;
 

include/services/fs.hpp

@@ -46,11 +46,13 @@ class FSService {
 
 	// Service commands
 	void abnegateAccessRight(u32 messagePointer);
+	void cardSlotIsInserted(u32 messagePointer);
 	void createDirectory(u32 messagePointer);
 	void createExtSaveData(u32 messagePointer);
 	void createFile(u32 messagePointer);
 	void closeArchive(u32 messagePointer);
 	void controlArchive(u32 messagePointer);
+	void deleteDirectory(u32 messagePointer);
 	void deleteExtSaveData(u32 messagePointer);
 	void deleteFile(u32 messagePointer);
 	void formatSaveData(u32 messagePointer);

src/core/fs/archive_save_data.cpp

@@ -64,8 +64,9 @@ HorizonResult SaveDataArchive::createDirectory(const FSPath& path) {
 
 HorizonResult SaveDataArchive::deleteFile(const FSPath& path) {
 	if (path.type == PathType::UTF16) {
-		if (!isPathSafe<PathType::UTF16>(path))
+		if (!isPathSafe<PathType::UTF16>(path)) {
 			Helpers::panic("Unsafe path in SaveData::DeleteFile");
+		}
 
 		fs::path p = IOFile::getAppData() / "SaveData";
 		p += fs::path(path.utf16_string).make_preferred();

src/core/fs/archive_sdmc.cpp

@@ -4,7 +4,37 @@
 namespace fs = std::filesystem;
 
 HorizonResult SDMCArchive::createFile(const FSPath& path, u64 size) {
-	Helpers::panic("[SDMC] CreateFile not yet supported");
+	if (path.type == PathType::UTF16) {
+		if (!isPathSafe<PathType::UTF16>(path)) {
+			Helpers::panic("Unsafe path in SDMC::CreateFile");
+		}
+
+		fs::path p = IOFile::getAppData() / "SDMC";
+		p += fs::path(path.utf16_string).make_preferred();
+
+		if (fs::exists(p)) {
+			return Result::FS::AlreadyExists;
+		}
+
+		IOFile file(p.string().c_str(), "wb");
+
+		// If the size is 0, leave the file empty and return success
+		if (size == 0) {
+			file.close();
+			return Result::Success;
+		}
+
+		// If it is not empty, seek to size - 1 and write a 0 to create a file of size "size"
+		else if (file.seek(size - 1, SEEK_SET) && file.writeBytes("", 1).second == 1) {
+			file.close();
+			return Result::Success;
+		}
+
+		file.close();
+		return Result::FS::FileTooLarge;
+	}
+
+	Helpers::panic("SDMC::CreateFile: Failed");
 	return Result::Success;
 }
 

src/core/fs/archive_system_save_data.cpp

@@ -82,4 +82,63 @@ HorizonResult SystemSaveDataArchive::createFile(const FSPath& path, u64 size) {
 
 	Helpers::panic("SystemSaveData::CreateFile: Failed");
 	return Result::Success;
+}
+
+
+HorizonResult SystemSaveDataArchive::deleteFile(const FSPath& path) {
+	if (path.type == PathType::UTF16) {
+		if (!isPathSafe<PathType::UTF16>(path)) {
+			Helpers::panic("Unsafe path in SystemSaveData::DeleteFile");
+		}
+
+		fs::path p = IOFile::getAppData() / ".." / "SharedFiles" / "SystemSaveData";
+		p += fs::path(path.utf16_string).make_preferred();
+
+		if (fs::is_directory(p)) {
+			Helpers::panic("SystemSaveData::DeleteFile: Tried to delete directory");
+		}
+
+		if (!fs::is_regular_file(p)) {
+			return Result::FS::FileNotFoundAlt;
+		}
+
+		std::error_code ec;
+		bool success = fs::remove(p, ec);
+
+		// It might still be possible for fs::remove to fail, if there's eg an open handle to a file being deleted
+		// In this case, print a warning, but still return success for now
+		if (!success) {
+			Helpers::warn("SystemSaveData::DeleteFile: fs::remove failed\n");
+		}
+
+		return Result::Success;
+	}
+
+	Helpers::panic("SystemSaveData::DeleteFile: Unknown path type");
+	return Result::Success;
+}
+
+Rust::Result<DirectorySession, HorizonResult> SystemSaveDataArchive::openDirectory(const FSPath& path) {
+	if (path.type == PathType::UTF16) {
+		if (!isPathSafe<PathType::UTF16>(path)) {
+			Helpers::panic("Unsafe path in SystemSaveData::OpenDirectory");
+		}
+
+		fs::path p = IOFile::getAppData() / ".." / "SharedFiles" / "SystemSaveData";
+		p += fs::path(path.utf16_string).make_preferred();
+
+		if (fs::is_regular_file(p)) {
+			printf("SystemSaveData: OpenDirectory used with a file path");
+			return Err(Result::FS::UnexpectedFileOrDir);
+		}
+
+		if (fs::is_directory(p)) {
+			return Ok(DirectorySession(this, p));
+		} else {
+			return Err(Result::FS::FileNotFoundAlt);
+		}
+	}
+
+	Helpers::panic("SystemSaveData::OpenDirectory: Unimplemented path type");
+	return Err(Result::Success);
 }

src/core/services/fs.cpp

@@ -16,6 +16,8 @@ namespace FSCommands {
 		OpenFile = 0x080201C2,
 		OpenFileDirectly = 0x08030204,
 		DeleteFile = 0x08040142,
+		DeleteDirectory = 0x08060142,
+		DeleteDirectoryRecursively = 0x08070142,
 		CreateFile = 0x08080202,
 		CreateDirectory = 0x08090182,
 		OpenDirectory = 0x080B0102,
@@ -26,6 +28,7 @@ namespace FSCommands {
 		GetFreeBytes = 0x08120080,
 		IsSdmcDetected = 0x08170000,
 		IsSdmcWritable = 0x08180000,
+		CardSlotIsInserted = 0x08210000,
 		AbnegateAccessRight = 0x08400040,
 		GetFormatInfo = 0x084500C2,
 		GetArchiveResource = 0x08490040,
@@ -160,11 +163,13 @@ FSPath FSService::readPath(u32 type, u32 pointer, u32 size) {
 void FSService::handleSyncRequest(u32 messagePointer) {
 	const u32 command = mem.read32(messagePointer);
 	switch (command) {
+		case FSCommands::CardSlotIsInserted: cardSlotIsInserted(messagePointer); break;
 		case FSCommands::CreateDirectory: createDirectory(messagePointer); break;
 		case FSCommands::CreateExtSaveData: createExtSaveData(messagePointer); break;
 		case FSCommands::CreateFile: createFile(messagePointer); break;
 		case FSCommands::ControlArchive: controlArchive(messagePointer); break;
 		case FSCommands::CloseArchive: closeArchive(messagePointer); break;
+		case FSCommands::DeleteDirectory: deleteDirectory(messagePointer); break;
 		case FSCommands::DeleteExtSaveData: deleteExtSaveData(messagePointer); break;
 		case FSCommands::DeleteFile: deleteFile(messagePointer); break;
 		case FSCommands::FormatSaveData: formatSaveData(messagePointer); break;
@@ -414,6 +419,18 @@ void FSService::deleteFile(u32 messagePointer) {
 	mem.write32(messagePointer + 4, static_cast<u32>(res));
 }
 
+void FSService::deleteDirectory(u32 messagePointer) {
+	const Handle archiveHandle = Handle(mem.read64(messagePointer + 8));
+	const u32 filePathType = mem.read32(messagePointer + 16);
+	const u32 filePathSize = mem.read32(messagePointer + 20);
+	const u32 filePathPointer = mem.read32(messagePointer + 28);
+	log("FS::DeleteDirectory\n");
+
+	Helpers::warn("Stubbed FS::DeleteDirectory call!");
+	mem.write32(messagePointer, IPC::responseHeader(0x806, 1, 0));
+	mem.write32(messagePointer + 4, Result::Success);
+}
+
 void FSService::getFormatInfo(u32 messagePointer) {
 	const u32 archiveID = mem.read32(messagePointer + 4);
 	const u32 pathType = mem.read32(messagePointer + 8);
@@ -690,4 +707,13 @@ void FSService::isSdmcWritable(u32 messagePointer) {
 	mem.write32(messagePointer, IPC::responseHeader(0x818, 2, 0));
 	mem.write32(messagePointer + 4, Result::Success);
 	mem.write8(messagePointer + 8, writeProtected ? 0 : 1);
+}
+
+void FSService::cardSlotIsInserted(u32 messagePointer) {
+	log("FS::CardSlotIsInserted\n");
+	constexpr bool cardInserted = false;
+
+	mem.write32(messagePointer, IPC::responseHeader(0x821, 2, 0));
+	mem.write32(messagePointer + 4, Result::Success);
+	mem.write8(messagePointer + 8, cardInserted ? 1 : 0);
 }

src/core/services/service_manager.cpp

@@ -95,6 +95,7 @@ void ServiceManager::registerClient(u32 messagePointer) {
 // clang-format off
 static std::map<std::string, Handle> serviceMap = {
 	{ "ac:u", KernelHandles::AC },
+	{ "act:a", KernelHandles::ACT },
 	{ "act:u", KernelHandles::ACT },
 	{ "am:app", KernelHandles::AM },
 	{ "APT:S", KernelHandles::APT }, // TODO: APT:A, APT:S and APT:U are slightly different