1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
#include "shadow.h"
#define WIN32_LEAN_AND_MEAN
#include "windows.h"
#include "inc/vss.h"
#include "inc/vswriter.h"
#include "inc/vsbackup.h"
#include <algorithm>
#include <string>
#include <cstdio>
#include <comdef.h>
//typedef GUID VSS_ID;
void writeString(const wchar_t* input, wchar_t* output, unsigned int outputBufferLen)
{
const unsigned int newSize = min(wcslen(input) + 1, outputBufferLen); //including null-termination
memcpy(output, input, newSize * sizeof(wchar_t));
}
std::wstring numberToHexString(const long number)
{
wchar_t result[100];
swprintf(result, 100, L"0x%08x", number);
return std::wstring(result);
}
void writeErrorMsg(const wchar_t* input, HRESULT hr, wchar_t* output, unsigned int outputBufferLen)
{
std::wstring formattedMsg(input);
formattedMsg += L" (";
formattedMsg += numberToHexString(hr);
formattedMsg += L": ";
formattedMsg += _com_error(hr).ErrorMessage();
formattedMsg += L")";
writeString(formattedMsg.c_str(), output, outputBufferLen);
}
bool shadow::createShadowCopy(const wchar_t* volumeName,
wchar_t* shadowVolName,
unsigned int shadowBufferLen,
void** backupHandle,
wchar_t* errorMessage,
unsigned int errorBufferLen)
{
//MessageBox(0, L"backup err", L"", 0); */
*backupHandle = NULL;
HRESULT hr = NULL;
IVssBackupComponents* pBackupComponents = NULL;
if (FAILED(hr = CreateVssBackupComponents(&pBackupComponents)))
{
if (hr == E_ACCESSDENIED)
writeErrorMsg(L"The caller does not have sufficient backup privileges or is not an administrator.", hr, errorMessage, errorBufferLen);
else
writeErrorMsg(L"Error calling \"CreateVssBackupComponents\".", hr, errorMessage, errorBufferLen);
return false;
}
if (FAILED(hr = pBackupComponents->InitializeForBackup()))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"Error calling \"InitializeForBackup\".", hr, errorMessage, errorBufferLen);
return false;
}
IVssAsync* pWriteMetaData = NULL;
if (FAILED(hr = pBackupComponents->GatherWriterMetadata( &pWriteMetaData )))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"\"Shadow.dll\" might be incompatible with this Operating System!\n\
Error calling \"GatherWriterMetadata\".", hr, errorMessage, errorBufferLen);
return false;
}
//wait for shadow copy writers to complete
hr = pWriteMetaData->Wait();
if (SUCCEEDED(hr))
pWriteMetaData->QueryStatus(&hr, NULL); //check if the async operation succeeded...
pWriteMetaData->Release();
if (FAILED(hr))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"Error calling \"ppWriteMetaData->Wait\".", hr, errorMessage, errorBufferLen);
return false;
}
VSS_ID snapshotSetId = {0};
if (FAILED(hr = pBackupComponents->StartSnapshotSet( &snapshotSetId )))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"Error calling \"StartSnapshotSet\".", hr, errorMessage, errorBufferLen);
return false;
}
VSS_ID SnapShotId = {0};
if (FAILED(hr = pBackupComponents->AddToSnapshotSet(const_cast<wchar_t*>(volumeName), GUID_NULL, &SnapShotId)))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"Error calling \"AddToSnapshotSet\".", hr, errorMessage, errorBufferLen);
return false;
}
if (FAILED(hr = pBackupComponents->SetBackupState( false, false, VSS_BT_FULL )))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"Error calling \"SetBackupState\".", hr, errorMessage, errorBufferLen);
return false;
}
IVssAsync* pPrepare = NULL;
if (FAILED(hr = pBackupComponents->PrepareForBackup( &pPrepare )))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"Error calling \"PrepareForBackup\".", hr, errorMessage, errorBufferLen);
return false;
}
hr = pPrepare->Wait();
if (SUCCEEDED(hr))
pPrepare->QueryStatus(&hr, NULL); //check if the async operation succeeded...
pPrepare->Release();
if (FAILED(hr))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"Error calling \"pPrepare->Wait\".", hr, errorMessage, errorBufferLen);
return false;
}
IVssAsync* pDoShadowCopy = NULL;
if (FAILED(hr = pBackupComponents->DoSnapshotSet( &pDoShadowCopy )))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"Error calling \"DoSnapshotSet\".", hr, errorMessage, errorBufferLen);
return false;
}
hr = pDoShadowCopy->Wait();
if (SUCCEEDED(hr))
pDoShadowCopy->QueryStatus(&hr, NULL); //check if the async operation succeeded...
pDoShadowCopy->Release();
if (FAILED(hr))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"Error calling \"pPrepare->Wait\".", hr, errorMessage, errorBufferLen);
return false;
}
VSS_SNAPSHOT_PROP props;
if (FAILED(hr = pBackupComponents->GetSnapshotProperties( SnapShotId, &props )))
{
releaseShadowCopy(pBackupComponents);
writeErrorMsg(L"Error calling \"GetSnapshotProperties\".", hr, errorMessage, errorBufferLen);
return false;
}
//finally: write volume name of newly created shadow copy
writeString(props.m_pwszSnapshotDeviceObject, shadowVolName, shadowBufferLen);
VssFreeSnapshotProperties(&props);
*backupHandle = pBackupComponents;
return true;
}
void shadow::releaseShadowCopy(void* backupHandle)
{
if (backupHandle != NULL)
static_cast<IVssBackupComponents*>(backupHandle)->Release();
}
|
