1 | /* $Id: VBoxManageSnapshot.cpp 33425 2010-10-25 14:30:43Z vboxsync $ */
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2 | /** @file
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3 | * VBoxManage - The 'snapshot' command.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2010 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 | /*******************************************************************************
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19 | * Header Files *
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20 | *******************************************************************************/
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21 | #include <VBox/com/com.h>
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22 | #include <VBox/com/string.h>
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23 | #include <VBox/com/array.h>
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24 | #include <VBox/com/ErrorInfo.h>
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25 | #include <VBox/com/errorprint.h>
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26 |
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27 | #include <VBox/com/VirtualBox.h>
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28 |
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29 | #include <iprt/stream.h>
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30 | #include <iprt/getopt.h>
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31 |
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32 | #include "VBoxManage.h"
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33 | using namespace com;
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34 |
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35 | /**
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36 | * Helper function used with "VBoxManage snapshot ... dump". Gets called to find the
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37 | * snapshot in the machine's snapshot tree that uses a particular diff image child of
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38 | * a medium.
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39 | * Horribly inefficient since we keep re-querying the snapshots tree for each image,
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40 | * but this is for quick debugging only.
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41 | * @param pMedium
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42 | * @param pThisSnapshot
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43 | * @param pCurrentSnapshot
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44 | * @param uMediumLevel
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45 | * @param uSnapshotLevel
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46 | * @return
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47 | */
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48 | bool FindAndPrintSnapshotUsingMedium(ComPtr<IMedium> &pMedium,
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49 | ComPtr<ISnapshot> &pThisSnapshot,
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50 | ComPtr<ISnapshot> &pCurrentSnapshot,
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51 | uint32_t uMediumLevel,
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52 | uint32_t uSnapshotLevel)
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53 | {
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54 | HRESULT rc;
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55 |
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56 | do
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57 | {
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58 | // get snapshot machine so we can figure out which diff image this created
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59 | ComPtr<IMachine> pSnapshotMachine;
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60 | CHECK_ERROR_BREAK(pThisSnapshot, COMGETTER(Machine)(pSnapshotMachine.asOutParam()));
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61 |
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62 | // get media attachments
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63 | SafeIfaceArray<IMediumAttachment> aAttachments;
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64 | CHECK_ERROR_BREAK(pSnapshotMachine, COMGETTER(MediumAttachments)(ComSafeArrayAsOutParam(aAttachments)));
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65 |
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66 | for (uint32_t i = 0;
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67 | i < aAttachments.size();
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68 | ++i)
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69 | {
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70 | ComPtr<IMediumAttachment> pAttach(aAttachments[i]);
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71 | DeviceType_T type;
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72 | CHECK_ERROR_BREAK(pAttach, COMGETTER(Type)(&type));
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73 | if (type == DeviceType_HardDisk)
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74 | {
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75 | ComPtr<IMedium> pMediumInSnapshot;
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76 | CHECK_ERROR_BREAK(pAttach, COMGETTER(Medium)(pMediumInSnapshot.asOutParam()));
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77 |
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78 | if (pMediumInSnapshot == pMedium)
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79 | {
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80 | // get snapshot name
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81 | Bstr bstrSnapshotName;
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82 | CHECK_ERROR_BREAK(pThisSnapshot, COMGETTER(Name)(bstrSnapshotName.asOutParam()));
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83 |
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84 | RTPrintf("%*s \"%ls\"%s\n",
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85 | 50 + uSnapshotLevel * 2, "", // indent
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86 | bstrSnapshotName.raw(),
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87 | (pThisSnapshot == pCurrentSnapshot) ? " (CURSNAP)" : "");
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88 | return true; // found
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89 | }
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90 | }
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91 | }
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92 |
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93 | // not found: then recurse into child snapshots
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94 | SafeIfaceArray<ISnapshot> aSnapshots;
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95 | CHECK_ERROR_BREAK(pThisSnapshot, COMGETTER(Children)(ComSafeArrayAsOutParam(aSnapshots)));
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96 |
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97 | for (uint32_t i = 0;
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98 | i < aSnapshots.size();
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99 | ++i)
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100 | {
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101 | ComPtr<ISnapshot> pChild(aSnapshots[i]);
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102 | if (FindAndPrintSnapshotUsingMedium(pMedium,
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103 | pChild,
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104 | pCurrentSnapshot,
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105 | uMediumLevel,
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106 | uSnapshotLevel + 1))
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107 | // found:
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108 | break;
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109 | }
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110 | } while (0);
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111 |
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112 | return false;
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113 | }
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114 |
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115 | /**
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116 | * Helper function used with "VBoxManage snapshot ... dump". Called from DumpSnapshot()
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117 | * for each hard disk attachment found in a virtual machine. This then writes out the
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118 | * root (base) medium for that hard disk attachment and recurses into the children
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119 | * tree of that medium, correlating it with the snapshots of the machine.
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120 | * @param pCurrentStateMedium constant, the medium listed in the current machine data (latest diff image).
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121 | * @param pMedium variant, initially the base medium, then a child of the base medium when recursing.
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122 | * @param pRootSnapshot constant, the root snapshot of the machine, if any; this then looks into the child snapshots.
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123 | * @param pCurrentSnapshot constant, the machine's current snapshot (so we can mark it in the output).
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124 | * @param uLevel variant, the recursion level for output indentation.
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125 | */
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126 | void DumpMediumWithChildren(ComPtr<IMedium> &pCurrentStateMedium,
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127 | ComPtr<IMedium> &pMedium,
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128 | ComPtr<ISnapshot> &pRootSnapshot,
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129 | ComPtr<ISnapshot> &pCurrentSnapshot,
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130 | uint32_t uLevel)
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131 | {
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132 | HRESULT rc;
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133 | do
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134 | {
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135 | // print this medium
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136 | Bstr bstrMediumName;
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137 | CHECK_ERROR_BREAK(pMedium, COMGETTER(Name)(bstrMediumName.asOutParam()));
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138 | RTPrintf("%*s \"%ls\"%s\n",
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139 | uLevel * 2, "", // indent
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140 | bstrMediumName.raw(),
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141 | (pCurrentStateMedium == pMedium) ? " (CURSTATE)" : "");
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142 |
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143 | // find and print the snapshot that uses this particular medium (diff image)
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144 | FindAndPrintSnapshotUsingMedium(pMedium, pRootSnapshot, pCurrentSnapshot, uLevel, 0);
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145 |
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146 | // recurse into children
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147 | SafeIfaceArray<IMedium> aChildren;
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148 | CHECK_ERROR_BREAK(pMedium, COMGETTER(Children)(ComSafeArrayAsOutParam(aChildren)));
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149 | for (uint32_t i = 0;
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150 | i < aChildren.size();
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151 | ++i)
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152 | {
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153 | ComPtr<IMedium> pChild(aChildren[i]);
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154 | DumpMediumWithChildren(pCurrentStateMedium, pChild, pRootSnapshot, pCurrentSnapshot, uLevel + 1);
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155 | }
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156 | } while (0);
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157 | }
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158 |
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159 | /**
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160 | * Implementation for "VBoxManage snapshot ... dump". This goes thru the machine's
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161 | * medium attachments and calls DumpMediumWithChildren() for each hard disk medium found,
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162 | * which then dumps the parent/child tree of that medium together with the corresponding
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163 | * snapshots.
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164 | * @param pMachine Machine to dump snapshots for.
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165 | */
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166 | void DumpSnapshot(ComPtr<IMachine> &pMachine)
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167 | {
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168 | HRESULT rc;
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169 |
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170 | do
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171 | {
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172 | // get root snapshot
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173 | ComPtr<ISnapshot> pSnapshot;
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174 | CHECK_ERROR_BREAK(pMachine, FindSnapshot(Bstr("").raw(), pSnapshot.asOutParam()));
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175 |
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176 | // get current snapshot
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177 | ComPtr<ISnapshot> pCurrentSnapshot;
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178 | CHECK_ERROR_BREAK(pMachine, COMGETTER(CurrentSnapshot)(pCurrentSnapshot.asOutParam()));
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179 |
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180 | // get media attachments
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181 | SafeIfaceArray<IMediumAttachment> aAttachments;
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182 | CHECK_ERROR_BREAK(pMachine, COMGETTER(MediumAttachments)(ComSafeArrayAsOutParam(aAttachments)));
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183 | for (uint32_t i = 0;
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184 | i < aAttachments.size();
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185 | ++i)
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186 | {
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187 | ComPtr<IMediumAttachment> pAttach(aAttachments[i]);
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188 | DeviceType_T type;
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189 | CHECK_ERROR_BREAK(pAttach, COMGETTER(Type)(&type));
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190 | if (type == DeviceType_HardDisk)
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191 | {
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192 | ComPtr<IMedium> pCurrentStateMedium;
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193 | CHECK_ERROR_BREAK(pAttach, COMGETTER(Medium)(pCurrentStateMedium.asOutParam()));
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194 |
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195 | ComPtr<IMedium> pBaseMedium;
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196 | CHECK_ERROR_BREAK(pCurrentStateMedium, COMGETTER(Base)(pBaseMedium.asOutParam()));
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197 |
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198 | Bstr bstrBaseMediumName;
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199 | CHECK_ERROR_BREAK(pBaseMedium, COMGETTER(Name)(bstrBaseMediumName.asOutParam()));
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200 |
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201 | RTPrintf("[%RI32] Images and snapshots for medium \"%ls\"\n", i, bstrBaseMediumName.raw());
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202 |
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203 | DumpMediumWithChildren(pCurrentStateMedium,
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204 | pBaseMedium,
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205 | pSnapshot,
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206 | pCurrentSnapshot,
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207 | 0);
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208 | }
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209 | }
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210 | } while (0);
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211 | }
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212 |
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213 | /**
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214 | * Implementation for all VBoxManage snapshot ... subcommands.
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215 | * @param a
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216 | * @return
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217 | */
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218 | int handleSnapshot(HandlerArg *a)
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219 | {
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220 | HRESULT rc;
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221 |
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222 | /* we need at least a VM and a command */
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223 | if (a->argc < 2)
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224 | return errorSyntax(USAGE_SNAPSHOT, "Not enough parameters");
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225 |
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226 | /* the first argument must be the VM */
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227 | Bstr bstrMachine(a->argv[0]);
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228 | ComPtr<IMachine> pMachine;
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229 | CHECK_ERROR(a->virtualBox, FindMachine(bstrMachine.raw(),
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230 | pMachine.asOutParam()));
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231 | if (!pMachine)
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232 | return 1;
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233 |
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234 | do
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235 | {
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236 | /* we have to open a session for this task (new or shared) */
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237 | rc = pMachine->LockMachine(a->session, LockType_Shared);
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238 | ComPtr<IConsole> console;
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239 | CHECK_ERROR_BREAK(a->session, COMGETTER(Console)(console.asOutParam()));
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240 |
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241 | /* switch based on the command */
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242 | bool fDelete = false,
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243 | fRestore = false,
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244 | fRestoreCurrent = false;
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245 |
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246 | if (!strcmp(a->argv[1], "take"))
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247 | {
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248 | /* there must be a name */
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249 | if (a->argc < 3)
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250 | {
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251 | errorSyntax(USAGE_SNAPSHOT, "Missing snapshot name");
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252 | rc = E_FAIL;
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253 | break;
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254 | }
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255 | Bstr name(a->argv[2]);
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256 |
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257 | /* parse the optional arguments */
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258 | Bstr desc;
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259 | bool fPause = false;
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260 | static const RTGETOPTDEF s_aTakeOptions[] =
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261 | {
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262 | { "--description", 'd', RTGETOPT_REQ_STRING },
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263 | { "-description", 'd', RTGETOPT_REQ_STRING },
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264 | { "-desc", 'd', RTGETOPT_REQ_STRING },
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265 | { "--pause", 'p', RTGETOPT_REQ_NOTHING }
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266 | };
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267 | RTGETOPTSTATE GetOptState;
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268 | RTGetOptInit(&GetOptState, a->argc, a->argv, s_aTakeOptions, RT_ELEMENTS(s_aTakeOptions),
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269 | 3, RTGETOPTINIT_FLAGS_NO_STD_OPTS);
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270 | int ch;
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271 | RTGETOPTUNION Value;
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272 | while ( SUCCEEDED(rc)
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273 | && (ch = RTGetOpt(&GetOptState, &Value)))
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274 | {
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275 | switch (ch)
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276 | {
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277 | case 'p':
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278 | fPause = true;
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279 | break;
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280 |
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281 | case 'd':
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282 | desc = Value.psz;
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283 | break;
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284 |
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285 | default:
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286 | errorGetOpt(USAGE_SNAPSHOT, ch, &Value);
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287 | rc = E_FAIL;
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288 | break;
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289 | }
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290 | }
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291 | if (FAILED(rc))
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292 | break;
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293 |
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294 | if (fPause)
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295 | {
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296 | MachineState_T machineState;
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297 | CHECK_ERROR_BREAK(console, COMGETTER(State)(&machineState));
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298 | if (machineState == MachineState_Running)
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299 | CHECK_ERROR_BREAK(console, Pause());
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300 | else
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301 | fPause = false;
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302 | }
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303 |
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304 | ComPtr<IProgress> progress;
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305 | CHECK_ERROR_BREAK(console, TakeSnapshot(name.raw(), desc.raw(),
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306 | progress.asOutParam()));
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307 |
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308 | rc = showProgress(progress);
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309 | if (FAILED(rc))
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310 | {
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311 | com::ProgressErrorInfo info(progress);
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312 | if (info.isBasicAvailable())
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313 | RTMsgError("Failed to take snapshot. Error message: %lS", info.getText().raw());
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314 | else
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315 | RTMsgError("Failed to take snapshot. No error message available!");
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316 | }
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317 |
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318 | if (fPause)
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319 | {
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320 | MachineState_T machineState;
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321 | CHECK_ERROR_BREAK(console, COMGETTER(State)(&machineState));
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322 | if (machineState == MachineState_Paused)
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323 | {
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324 | if (SUCCEEDED(rc))
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325 | CHECK_ERROR_BREAK(console, Resume());
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326 | else
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327 | console->Resume();
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328 | }
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329 | }
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330 | }
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331 | else if ( (fDelete = !strcmp(a->argv[1], "delete"))
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332 | || (fRestore = !strcmp(a->argv[1], "restore"))
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333 | || (fRestoreCurrent = !strcmp(a->argv[1], "restorecurrent"))
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334 | )
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335 | {
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336 | if (fRestoreCurrent)
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337 | {
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338 | if (a->argc > 2)
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339 | {
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340 | errorSyntax(USAGE_SNAPSHOT, "Too many arguments");
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341 | rc = E_FAIL;
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342 | break;
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343 | }
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344 | }
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345 | /* exactly one parameter: snapshot name */
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346 | else if (a->argc != 3)
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347 | {
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348 | errorSyntax(USAGE_SNAPSHOT, "Expecting snapshot name only");
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349 | rc = E_FAIL;
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350 | break;
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351 | }
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352 |
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353 | ComPtr<ISnapshot> pSnapshot;
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354 | ComPtr<IProgress> pProgress;
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355 | Bstr bstrSnapGuid;
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356 |
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357 | if (fRestoreCurrent)
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358 | {
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359 | CHECK_ERROR_BREAK(pMachine, COMGETTER(CurrentSnapshot)(pSnapshot.asOutParam()));
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360 | }
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361 | else
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362 | {
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363 | // restore or delete snapshot: then resolve cmd line argument to snapshot instance
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364 | CHECK_ERROR_BREAK(pMachine, FindSnapshot(Bstr(a->argv[2]).raw(),
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365 | pSnapshot.asOutParam()));
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366 | }
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367 |
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368 | CHECK_ERROR_BREAK(pSnapshot, COMGETTER(Id)(bstrSnapGuid.asOutParam()));
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369 |
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370 | if (fDelete)
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371 | {
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372 | CHECK_ERROR_BREAK(console, DeleteSnapshot(bstrSnapGuid.raw(),
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373 | pProgress.asOutParam()));
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374 | }
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375 | else
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376 | {
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377 | // restore or restore current
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378 | RTPrintf("Restoring snapshot %ls\n", bstrSnapGuid.raw());
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379 | CHECK_ERROR_BREAK(console, RestoreSnapshot(pSnapshot, pProgress.asOutParam()));
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380 | }
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381 |
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382 | rc = showProgress(pProgress);
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383 | if (FAILED(rc))
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384 | {
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385 | com::ProgressErrorInfo info(pProgress);
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386 | if (info.isBasicAvailable())
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387 | RTMsgError("Snapshot operation failed. Error message: %lS", info.getText().raw());
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388 | else
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389 | RTMsgError("Snapshot operation failed. No error message available!");
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390 | }
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391 | }
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392 | else if (!strcmp(a->argv[1], "edit"))
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393 | {
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394 | if (a->argc < 3)
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395 | {
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396 | errorSyntax(USAGE_SNAPSHOT, "Missing snapshot name");
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397 | rc = E_FAIL;
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398 | break;
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399 | }
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400 |
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401 | ComPtr<ISnapshot> snapshot;
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402 |
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403 | if ( !strcmp(a->argv[2], "--current")
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404 | || !strcmp(a->argv[2], "-current"))
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405 | {
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406 | CHECK_ERROR_BREAK(pMachine, COMGETTER(CurrentSnapshot)(snapshot.asOutParam()));
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407 | }
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408 | else
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409 | {
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410 | CHECK_ERROR_BREAK(pMachine, FindSnapshot(Bstr(a->argv[2]).raw(),
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411 | snapshot.asOutParam()));
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412 | }
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413 |
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414 | /* parse options */
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415 | for (int i = 3; i < a->argc; i++)
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416 | {
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417 | if ( !strcmp(a->argv[i], "--name")
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418 | || !strcmp(a->argv[i], "-name")
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419 | || !strcmp(a->argv[i], "-newname"))
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420 | {
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421 | if (a->argc <= i + 1)
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422 | {
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423 | errorArgument("Missing argument to '%s'", a->argv[i]);
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424 | rc = E_FAIL;
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425 | break;
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426 | }
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427 | i++;
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428 | snapshot->COMSETTER(Name)(Bstr(a->argv[i]).raw());
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429 | }
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430 | else if ( !strcmp(a->argv[i], "--description")
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431 | || !strcmp(a->argv[i], "-description")
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432 | || !strcmp(a->argv[i], "-newdesc"))
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433 | {
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434 | if (a->argc <= i + 1)
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435 | {
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436 | errorArgument("Missing argument to '%s'", a->argv[i]);
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437 | rc = E_FAIL;
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438 | break;
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439 | }
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440 | i++;
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441 | snapshot->COMSETTER(Description)(Bstr(a->argv[i]).raw());
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442 | }
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443 | else
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444 | {
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445 | errorSyntax(USAGE_SNAPSHOT, "Invalid parameter '%s'", Utf8Str(a->argv[i]).c_str());
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446 | rc = E_FAIL;
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447 | break;
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448 | }
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449 | }
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450 |
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451 | }
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452 | else if (!strcmp(a->argv[1], "showvminfo"))
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453 | {
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454 | /* exactly one parameter: snapshot name */
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455 | if (a->argc != 3)
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456 | {
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457 | errorSyntax(USAGE_SNAPSHOT, "Expecting snapshot name only");
|
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458 | rc = E_FAIL;
|
---|
459 | break;
|
---|
460 | }
|
---|
461 |
|
---|
462 | ComPtr<ISnapshot> snapshot;
|
---|
463 |
|
---|
464 | CHECK_ERROR_BREAK(pMachine, FindSnapshot(Bstr(a->argv[2]).raw(),
|
---|
465 | snapshot.asOutParam()));
|
---|
466 |
|
---|
467 | /* get the machine of the given snapshot */
|
---|
468 | ComPtr<IMachine> pMachine2;
|
---|
469 | snapshot->COMGETTER(Machine)(pMachine2.asOutParam());
|
---|
470 | showVMInfo(a->virtualBox, pMachine2, VMINFO_NONE, console);
|
---|
471 | }
|
---|
472 | else if (!strcmp(a->argv[1], "dump")) // undocumented parameter to debug snapshot info
|
---|
473 | DumpSnapshot(pMachine);
|
---|
474 | else
|
---|
475 | {
|
---|
476 | errorSyntax(USAGE_SNAPSHOT, "Invalid parameter '%s'", Utf8Str(a->argv[1]).c_str());
|
---|
477 | rc = E_FAIL;
|
---|
478 | }
|
---|
479 | } while (0);
|
---|
480 |
|
---|
481 | a->session->UnlockMachine();
|
---|
482 |
|
---|
483 | return SUCCEEDED(rc) ? 0 : 1;
|
---|
484 | }
|
---|
485 |
|
---|