PureBasic Forums - English

Code: Select all

#include <stdio.h>
#include <tchar.h>
#include <shlwapi.h>
#include <vss.h>
#include <vswriter.h>
#include <vsbackup.h>

int _tmain(int argc, _TCHAR* argv[])
{
int returnValue = 1;
if (argc != 3)
{
printf("Usage: LockedFileCopy.exe sourcefile destinationfile\n");
return 1;
}
TCHAR sourceFile[_MAX_PATH] = {0};
LPTSTR destinationFile = argv[2];

//
// Create an absolute path if it is relative
//
_tcscpy(sourceFile, argv[1]);
if (PathIsRelative(sourceFile))
{
::PathFindFileName(sourceFile);
}

if (_taccess(sourceFile,0) != 0)
{
_tprintf(_T("\"%s\" does not exist!\n"), argv[1]);
return 1;
}

if (CoInitialize(NULL) != S_OK)
{
printf("CoInitialize failed!\n");
return 1;
}

//
// Create the IVssBackupComponents Interface
//
IVssBackupComponents *pBackup = NULL;
HRESULT result = CreateVssBackupComponents(&pBackup);
if (result == S_OK)
{
//
// Initialize for backup
//
result = pBackup->InitializeForBackup();</code>

if (result == S_OK)
{
//
// Prompts each writer to send the metadata they have collected
//
IVssAsync *pAsync = NULL;
result = pBackup->GatherWriterMetadata(&pAsync);
if (result == S_OK)
{
printf("Gathering metadata from writers...\n");
result = pAsync->Wait();
if (result == S_OK)
{
//
// Creates a new, empty shadow copy set
//
VSS_ID snapshotSetId;
result = pBackup->StartSnapshotSet(&snapshotSetId);
if (result == S_OK)
{
//
// Add Volume to the shadow copy set
//
WCHAR volumeName[4] = {sourceFile[0], _T(':'), _T("\\")};
wprintf(L"Adding %s volume to snapshot set...\n", volumeName);
result = pBackup->AddToSnapshotSet(volumeName, GUID_NULL, &snapshotSetId);
if (result == S_OK)
{
//
// Configure the backup operation for Copy with no backup history
//
result = pBackup->SetBackupState(false, false, VSS_BT_COPY);
if (result == S_OK)
{
//
// Make VSS generate a PrepareForBackup event
//
IVssAsync* pPrepare = NULL;
result = pBackup->PrepareForBackup(&pPrepare);
if (result == S_OK)
{
printf("Preparing for backup...\n");
result = pPrepare->Wait();
if (result == S_OK)
{
//
// Commit all snapshots in this set
//
IVssAsync* pDoShadowCopy = NULL;
result = pBackup->DoSnapshotSet(&pDoShadowCopy);
if (result == S_OK)
{
printf("Taking snapshots...\n");
result = pDoShadowCopy->Wait();
if (result == S_OK)
{
//
// Get the snapshot device object from the properties
//
VSS_SNAPSHOT_PROP snapshotProp = {0};
result = pBackup->GetSnapshotProperties(snapshotSetId, &snapshotProp);
if (result == S_OK)
{
//
// Create the source path by using the volume specified in
// m_pwszSnapshotDeviceObject and appending the path of
// the source file (minus the drive letter)
//
int sourceLength = wcslen(snapshotProp.m_pwszSnapshotDeviceObject) +
_tcslen(sourceFile);
LPTSTR sourceSnapshotFile = new TCHAR[sourceLength];
_tcscpy_s(sourceSnapshotFile, sourceLength,
snapshotProp.m_pwszSnapshotDeviceObject);
_tcscat_s(sourceSnapshotFile, sourceLength, &sourceFile[2]);</code>

//
// Copy the file from the snapshot device object
//
if (!::CopyFile(sourceSnapshotFile, destinationFile, FALSE))
{
DWORD lastError = GetLastError();
printf("Failed to copy file - Error: %d\n", lastError);
}
else
{
printf("Successfully copied file!\n");
returnValue = 0;
}
delete [] sourceSnapshotFile;</code>

//
// Cleanup properties
//
VssFreeSnapshotProperties(&snapshotProp);
}
}
pDoShadowCopy->Release();
}
}
pPrepare->Release();
}
}
}
//
// Delete the snapshot
//
LONG deletedSnapshots = 0;
VSS_ID nonDeletedSnapshotId;
result = pBackup->DeleteSnapshots(snapshotSetId, VSS_OBJECT_SNAPSHOT,
TRUE, &deletedSnapshots, &nonDeletedSnapshotId);
}
}
pAsync->Release();
}
}
pBackup->Release();
}
return returnValue;
}