C++ fs::file类代码示例

s32 sys_spu_image_open(vm::ptr<sys_spu_image_t> img, vm::cptr<char> path)
{
	sys_spu.warning("sys_spu_image_open(img=*0x%x, path=*0x%x)", img, path);

	const fs::file f(vfs::get(path.get_ptr()));
	if (!f)
	{
		sys_spu.error("sys_spu_image_open() error: '%s' not found!", path.get_ptr());
		return CELL_ENOENT;
	}

	SceHeader hdr;
	hdr.Load(f);

	if (hdr.CheckMagic())
	{
		throw fmt::exception("sys_spu_image_open() error: '%s' is encrypted! Try to decrypt it manually and try again.", path.get_ptr());
	}

	f.seek(0);

	u32 entry;
	u32 offset = LoadSpuImage(f, entry);

	img->type = SYS_SPU_IMAGE_TYPE_USER;
	img->entry_point = entry;
	img->segs.set(offset); // TODO: writing actual segment info
	img->nsegs = 1; // wrong value

	return CELL_OK;
}

extern bool verify_npdrm_self_headers(const fs::file& self, u8* klic_key)
{
	if (!self)
		return false;

	self.seek(0);

	if (self.size() >= 4 && self.read<u32>() == "SCE\0"_u32)
	{
		// Check the ELF file class (32 or 64 bit).
		bool isElf32 = IsSelfElf32(self);

		// Start the decrypter on this SELF file.
		SELFDecrypter self_dec(self);

		// Load the SELF file headers.
		if (!self_dec.LoadHeaders(isElf32))
		{
			LOG_ERROR(LOADER, "SELF: Failed to load SELF file headers!");
			return false;
		}

		// Load and decrypt the SELF file metadata.
		if (!self_dec.LoadMetadata(klic_key))
		{
			LOG_ERROR(LOADER, "SELF: Failed to load SELF file metadata!");
			return false;
		}
	}
	return true;
}

s32 cellUserInfoGetStat(u32 id, vm::ptr<CellUserInfoUserStat> stat)
{
	cellUserInfo.warning("cellUserInfoGetStat(id=%d, stat=*0x%x)", id, stat);

	if (id > CELL_SYSUTIL_USERID_MAX)
		return CELL_USERINFO_ERROR_NOUSER;

	if (id == CELL_SYSUTIL_USERID_CURRENT)
	{
		// TODO: Return current user/profile when that is implemented
		id = 1;
	}

	const std::string& path = vfs::get(fmt::format("/dev_hdd0/home/%08d/", id));
	if (!fs::is_dir(path))
		return CELL_USERINFO_ERROR_NOUSER;

	const fs::file f(path + "localusername");
	if (!f)
		return CELL_USERINFO_ERROR_INTERNAL;

	stat->id = id;
	strcpy_trunc(stat->name, f.to_string());
	return CELL_OK;
}

s32 sys_raw_spu_load(s32 id, vm::cptr<char> path, vm::ptr<u32> entry)
{
	sysPrxForUser.warning("sys_raw_spu_load(id=%d, path=*0x%x, entry=*0x%x)", id, path, entry);
	sysPrxForUser.warning("*** path = '%s'", path.get_ptr());

	const fs::file f(vfs::get(path.get_ptr()));
	if (!f)
	{
		sysPrxForUser.error("sys_raw_spu_load() error: '%s' not found!", path.get_ptr());
		return CELL_ENOENT;
	}

	SceHeader hdr;
	hdr.Load(f);

	if (hdr.CheckMagic())
	{
		throw fmt::exception("sys_raw_spu_load() error: '%s' is encrypted! Try to decrypt it manually and try again.", path.get_ptr());
	}

	f.seek(0);

	u32 _entry;
	LoadSpuImage(f, _entry, RAW_SPU_BASE_ADDR + RAW_SPU_OFFSET * id);

	*entry = _entry | 1;

	return CELL_OK;
}

void save_gui_cfg()
{
	YAML::Emitter out;
	out.SetSeqFormat(YAML::Flow);
	out << g_gui_cfg;

	// Save to file
	s_gui_cfg.seek(0);
	s_gui_cfg.trunc(0);
	s_gui_cfg.write(out.c_str(), out.size());
}

extern fs::file decrypt_self(fs::file elf_or_self, u8* klic_key)
{
	if (!elf_or_self)
	{
		return fs::file{};
	}

	elf_or_self.seek(0);

	// Check SELF header first. Check for a debug SELF.
	if (elf_or_self.size() >= 4 && elf_or_self.read<u32>() == "SCE\0"_u32 && !CheckDebugSelf(elf_or_self))
	{
		// Check the ELF file class (32 or 64 bit).
		bool isElf32 = IsSelfElf32(elf_or_self);

		// Start the decrypter on this SELF file.
		SELFDecrypter self_dec(elf_or_self);

		// Load the SELF file headers.
		if (!self_dec.LoadHeaders(isElf32))
		{
			LOG_ERROR(LOADER, "SELF: Failed to load SELF file headers!");
			return fs::file{};
		}

		// Load and decrypt the SELF file metadata.
		if (!self_dec.LoadMetadata(klic_key))
		{
			LOG_ERROR(LOADER, "SELF: Failed to load SELF file metadata!");
			return fs::file{};
		}

		// Decrypt the SELF file data.
		if (!self_dec.DecryptData())
		{
			LOG_ERROR(LOADER, "SELF: Failed to decrypt SELF file data!");
			return fs::file{};
		}

		// Make a new ELF file from this SELF.
		return self_dec.MakeElf(isElf32);
	}

	return elf_or_self;
}

void ControlInfo::Load(const fs::file& f)
{
	type = Read32(f);
	size = Read32(f);
	next = Read64(f);

	if (type == 1)
	{
		control_flags.ctrl_flag1 = Read32(f);
		control_flags.unknown1 = Read32(f);
		control_flags.unknown2 = Read32(f);
		control_flags.unknown3 = Read32(f);
		control_flags.unknown4 = Read32(f);
		control_flags.unknown5 = Read32(f);
		control_flags.unknown6 = Read32(f);
		control_flags.unknown7 = Read32(f);
	}
	else if (type == 2)
	{
		if (size == 0x30)
		{
			f.read(file_digest_30.digest, 20);
			file_digest_30.unknown = Read64(f);
		}
		else if (size == 0x40)
		{
			f.read(file_digest_40.digest1, 20);
			f.read(file_digest_40.digest2, 20);
			file_digest_40.unknown = Read64(f);
		}
	}
	else if (type == 3)
	{
		npdrm.magic = Read32(f);
		npdrm.unknown1 = Read32(f);
		npdrm.license = Read32(f);
		npdrm.type = Read32(f);
		f.read(npdrm.content_id, 48);
		f.read(npdrm.digest, 16);
		f.read(npdrm.invdigest, 16);
		f.read(npdrm.xordigest, 16);
		npdrm.unknown2 = Read64(f);
		npdrm.unknown3 = Read64(f);
	}
}

static bool IsSelfElf32(const fs::file& f)
{
	if (!f) return false;

	f.seek(0);

	SceHeader hdr;
	SelfHeader sh;
	hdr.Load(f);
	sh.Load(f);

	// Locate the class byte and check it.
	u8 elf_class[0x8];

	f.seek(sh.se_elfoff);
	f.read(elf_class, 0x8);

	return (elf_class[4] == 1);
}

static bool CheckDebugSelf(fs::file& s)
{
	if (s.size() < 0x18)
	{
		return false;
	}

	// Get the key version.
	s.seek(0x08);

	const u16 key_version = s.read<le_t<u16>>();

	// Check for DEBUG version.
	if (key_version == 0x80 || key_version == 0xc0)
	{
		LOG_WARNING(LOADER, "Debug SELF detected! Removing fake header...");

		// Get the real elf offset.
		s.seek(0x10);

		// Start at the real elf offset.
		s.seek(key_version == 0x80 ? +s.read<be_t<u64>>() : +s.read<le_t<u64>>());

		// Write the real ELF file back.
		fs::file e = fs::make_stream<std::vector<u8>>();

		// Copy the data.
		char buf[2048];
		while (u64 size = s.read(buf, 2048))
		{
			e.write(buf, size);
		}

		s = std::move(e);
		return true;
	}

	// Leave the file untouched.
	return false;
}

error_code cellUserInfoGetStat(u32 id, vm::ptr<CellUserInfoUserStat> stat)
{
	cellUserInfo.warning("cellUserInfoGetStat(id=%d, stat=*0x%x)", id, stat);

	if (id > CELL_SYSUTIL_USERID_MAX)
	{
		return CELL_USERINFO_ERROR_NOUSER;
	}

	if (id == CELL_SYSUTIL_USERID_CURRENT)
	{
		// TODO: Return current user/profile when that is implemented
		id = 1;
	}

	if (!stat)
		return CELL_USERINFO_ERROR_PARAM;

	const std::string& path = vfs::get(fmt::format("/dev_hdd0/home/%08d/", id));

	if (!fs::is_dir(path))
	{
		cellUserInfo.error("cellUserInfoGetStat(): CELL_USERINFO_ERROR_NOUSER. User %d doesn't exist. Did you delete the user folder?", id);
		return CELL_USERINFO_ERROR_NOUSER;
	}

	const fs::file f(path + "localusername");

	if (!f)
	{
		cellUserInfo.error("cellUserInfoGetStat(): CELL_USERINFO_ERROR_INTERNAL. Username for user %d doesn't exist. Did you delete the username file?", id);
		return CELL_USERINFO_ERROR_INTERNAL;
	}

	stat->id = id;
	strcpy_trunc(stat->name, f.to_string());

	return CELL_OK;
}

void Emulator::Init()
{
	if (!g_tty)
	{
		g_tty.open(fs::get_config_dir() + "TTY.log", fs::rewrite + fs::append);
	}
	
	idm::init();
	fxm::init();

	// Reset defaults, cache them
	cfg::root.from_default();
	g_cfg_defaults = cfg::root.to_string();

	// Reload global configuration
	cfg::root.from_string(fs::file(fs::get_config_dir() + "/config.yml", fs::read + fs::create).to_string());
}

void Emulator::Init()
{
	if (!g_tty)
	{
		g_tty.open(fs::get_config_dir() + "TTY.log", fs::rewrite + fs::append);
	}
	
	idm::init();
	fxm::init();

	// Reset defaults, cache them
	g_cfg.from_default();
	g_cfg_defaults = g_cfg.to_string();

	// Reload global configuration
	g_cfg.from_string(fs::file(fs::get_config_dir() + "/config.yml", fs::read + fs::create).to_string());

	// Create directories
	const std::string emu_dir_ = g_cfg.vfs.emulator_dir;
	const std::string emu_dir = emu_dir_.empty() ? fs::get_config_dir() : emu_dir_;
	const std::string dev_hdd0 = fmt::replace_all(g_cfg.vfs.dev_hdd0, "$(EmulatorDir)", emu_dir);
	const std::string dev_hdd1 = fmt::replace_all(g_cfg.vfs.dev_hdd1, "$(EmulatorDir)", emu_dir);
	const std::string dev_usb = fmt::replace_all(g_cfg.vfs.dev_usb000, "$(EmulatorDir)", emu_dir);

	fs::create_path(dev_hdd0);
	fs::create_dir(dev_hdd0 + "game/");
	fs::create_dir(dev_hdd0 + "game/TEST12345/");
	fs::create_dir(dev_hdd0 + "game/TEST12345/USRDIR/");
	fs::create_dir(dev_hdd0 + "home/");
	fs::create_dir(dev_hdd0 + "home/00000001/");
	fs::create_dir(dev_hdd0 + "home/00000001/exdata/");
	fs::create_dir(dev_hdd0 + "home/00000001/savedata/");
	fs::create_dir(dev_hdd0 + "home/00000001/trophy/");
	fs::write_file(dev_hdd0 + "home/00000001/localusername", fs::create + fs::excl + fs::write, "User"s);
	fs::create_dir(dev_hdd0 + "disc/");
	fs::create_dir(dev_hdd1 + "cache/");
	fs::create_dir(dev_hdd1 + "game/");
	fs::create_path(dev_hdd1);
	fs::create_path(dev_usb);
  
#ifdef WITH_GDB_DEBUGGER
	fxm::make<GDBDebugServer>();
#endif
	// Initialize patch engine
	fxm::make_always<patch_engine>()->append(fs::get_config_dir() + "/patch.yml");
}

inline void Write16LE(const fs::file& f, const u16 data)
{
	f.write(&data, sizeof(data));
}

void Elf32_Phdr::LoadLE(const fs::file& f)
{
	f.read(this, sizeof(*this));
}

error_code sys_tty_write(s32 ch, vm::cptr<char> buf, u32 len, vm::ptr<u32> pwritelen)
{
	sys_tty.notice("sys_tty_write(ch=%d, buf=*0x%x, len=%d, pwritelen=*0x%x)", ch, buf, len, pwritelen);

	if (ch > 15)
	{
		return CELL_EINVAL;
	}

	if (static_cast<s32>(len) <= 0)
	{
		*pwritelen = 0;

		return CELL_OK;
	}

	if (g_tty)
	{
		g_tty.write(buf.get_ptr(), len);
	}

	*pwritelen = len;

	return CELL_OK;
}