分类:
2008-10-13 16:10:51
#include#include #include #include #include #include #define BUFSIZE 512 BOOL GetFileNameFromHandle(HANDLE hFile) { BOOL bSuccess = FALSE; TCHAR pszFilename[MAX_PATH+1]; HANDLE hFileMap; // Get the file size. DWORD dwFileSizeHi = 0; DWORD dwFileSizeLo = GetFileSize(hFile, &dwFileSizeHi); if( dwFileSizeLo == 0 && dwFileSizeHi == 0 ) { printf("Cannot map a file with a length of zero.\n"); return FALSE; } // Create a file mapping object. hFileMap = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, MAX_PATH, NULL); if (hFileMap) { // Create a file mapping to get the file name. void* pMem = MapViewOfFile(hFileMap, FILE_MAP_READ, 0, 0, 1); if (pMem) { if (GetMappedFileName (GetCurrentProcess(), pMem, pszFilename, MAX_PATH)) { // Translate path with device name to drive letters. TCHAR szTemp[BUFSIZE]; szTemp[0] = '\0'; if (GetLogicalDriveStrings(BUFSIZE-1, szTemp)) { TCHAR szName[MAX_PATH]; TCHAR szDrive[3] = TEXT(" :"); BOOL bFound = FALSE; TCHAR* p = szTemp; do { // Copy the drive letter to the template string *szDrive = *p; // Look up each device name if (QueryDosDevice(szDrive, szName, BUFSIZE)) { UINT uNameLen = _tcslen(szName); if (uNameLen < MAX_PATH) { bFound = _tcsnicmp(pszFilename, szName, uNameLen) == 0; if (bFound) { // Reconstruct pszFilename using szTempFile // Replace device path with DOS path TCHAR szTempFile[MAX_PATH]; StringCchPrintf(szTempFile, MAX_PATH, TEXT("%s%s"), szDrive, pszFilename+uNameLen); StringCchCopyN(pszFilename, MAX_PATH+1, szTempFile, _tcslen(szTempFile)); } } } // Go to the next NULL character. while (*p++); } while (!bFound && *p); // end of string } } bSuccess = TRUE; UnmapViewOfFile(pMem); } CloseHandle(hFileMap); } _tprintf(TEXT("File name is %s\n"), pszFilename); return(bSuccess); }