Win32API ファイルの情報を取得する GetFileInformationByHandle

ファイルの情報を取得する

使用するAPI

GetFileInformationByHandle

//ファイル情報を取得し、コンソールに表示する


#include <windows.h>

void PrintFileTimeByLocalTime(const FILETIME *lpFileTime, 
			const char *lpTitle)
{
	FILETIME localFileTime;
	SYSTEMTIME systemTime;
	static char *dayOfWeek[] = 
		{"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};

	FileTimeToLocalFileTime(lpFileTime, &localFileTime);
	FileTimeToSystemTime(&localFileTime, &systemTime);

	printf("%s = ", lpTitle);
	printf("%04d/%02d/%02d %02d:%02d:%02d.%03d (%s)\n",
		systemTime.wYear,
		systemTime.wMonth,
		systemTime.wDay,
		systemTime.wHour,
		systemTime.wMinute,
		systemTime.wSecond,
		systemTime.wMilliseconds,
		dayOfWeek[systemTime.wDayOfWeek]);
}

void PrintFileAttributes(DWORD dwAttributes)
{
	printf("FileAttributes = ");
	if (dwAttributes & FILE_ATTRIBUTE_ARCHIVE) {
		printf("Archive ");
	}
	if (dwAttributes & FILE_ATTRIBUTE_DIRECTORY) {
		printf("Directory ");
	}
	if (dwAttributes & FILE_ATTRIBUTE_HIDDEN) {
		printf("Hidden ");
	}
	if (dwAttributes & FILE_ATTRIBUTE_NORMAL) {
		printf("Normal ");
	}
	if (dwAttributes & FILE_ATTRIBUTE_READONLY) {
		printf("Readonly ");
	}
	if (dwAttributes & FILE_ATTRIBUTE_SYSTEM) {
		printf("System ");
	}
	if (dwAttributes & FILE_ATTRIBUTE_TEMPORARY) {
		printf("Temporary ");
	}
	putc('\n', stdout);
}

int main()
{
	HANDLE hFile;
	BY_HANDLE_FILE_INFORMATION fileInformation;
	char *lpFileName = "test.txt";

	hFile = CreateFile(lpFileName,
		GENERIC_READ,
		FILE_SHARE_READ,
		NULL,
		OPEN_EXISTING,
		FILE_ATTRIBUTE_NORMAL,
		NULL);

	if (hFile == INVALID_HANDLE_VALUE) {
		printf("CreateFile failed\n");
		return 1;
	}

	GetFileInformationByHandle(hFile, &fileInformation);
	CloseHandle(hFile);

	//FileTimes
	PrintFileTimeByLocalTime(
		&fileInformation.ftCreationTime, "CreationTime");
	
	PrintFileTimeByLocalTime(
		&fileInformation.ftLastAccessTime, "LastAccessTime");
	
	PrintFileTimeByLocalTime(
		&fileInformation.ftLastWriteTime, "LastWriteTime");


	//FileAttributes
	PrintFileAttributes(fileInformation.dwFileAttributes);
	
	//VolumeSerialNumber
	printf("VolumeSerialNumber = %u\n", 
		fileInformation.dwVolumeSerialNumber);

	//FileSize
	printf("FileSizeLow = %u, FileSizeHigh = %u\n", 
		fileInformation.nFileSizeLow, 
		fileInformation.nFileIndexHigh);

	//FileIndex
	printf("FileIndexLow = %u, FileIndexHigh = %u\n", 
		fileInformation.nFileIndexLow, 
		fileInformation.nFileIndexHigh);

	//NumberOfLinks
	printf("NumberOfLinks = %u\n", 
		fileInformation.nNumberOfLinks);

	return 0;
}