Function openFile

source/FileSystem/openFile.cpp:163–195

+---------------------------------------------------------------------------------------------------------------------*/

std::pair<int, FILE*> openFile(FileSystem& fileSystem, const char* const path, const char* const mode)
{
	assert(mode != nullptr);

	int flags;
	{
		const auto ret = __sflags(_REENT, mode, &flags);
		assert(ret != 0);
	}

	std::unique_ptr<File> file;
	{
		int ret;
		std::tie(ret, file) = fileSystem.openFile(path, flags);
		if (ret != 0)
			return {ret, {}};
	}

	assert(file != nullptr);

	auto closeScopeGuard = estd::makeScopeGuard([&file]()
			{
				file->close();
			});

	const auto ret = fopencookie(file.get(), mode, {fileRead, fileWrite, fileSeek, fileClose});
	if (ret == nullptr)
		return {errno, {}};

	closeScopeGuard.release();
	file.release();
	return {{}, ret};
}

}	// namespace distortos