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1 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include <ssm/ssmcustomcommand.h> |
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17 #include <ssm/ssmcustomcommandinfo.h> |
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18 #include <f32file.h> |
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19 #include <s32file.h> |
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20 |
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21 #include "cmdcustomcommand.h" |
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22 #include "ssmcommandparameters.h" |
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23 #include "ssmcommandutilprovider.h" |
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24 |
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25 #include "ssmdebug.h" |
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26 #include "ssmpanic.h" |
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27 |
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28 // This file is used to store the handles of the libraries which has unload option as ENeverUnload. |
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29 // This is also defined in the CleSrv and these handles are used to release those libraries from |
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30 // CleSrv destrcutor. |
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31 _LIT(KNeverUnloadLibHandleFile, ":\\private\\2000d75b\\temp\\unloadlibhandles.bin"); |
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32 |
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33 /** |
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34 Used to create an instance of CCmdCustomCommand class from a read stream. |
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35 CSsmCommandList::InternalizeL() uses this method to construct a command from stream. |
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36 |
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37 @param aReadStream Read stream containing data through which object can be created |
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38 @return A pointer to an object of type CCmdCustomCommand. |
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39 */ |
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40 CCmdCustomCommand* CCmdCustomCommand::NewL(RReadStream& aReadStream) |
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41 { |
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42 CCmdCustomCommand* self = new (ELeave) CCmdCustomCommand(); |
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43 CleanupStack::PushL(self); |
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44 self->ConstructL(aReadStream); |
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45 CleanupStack::Pop(self); |
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46 return self; |
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47 } |
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48 |
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49 #ifdef SYMBIAN_SSM_FLEXIBLE_MERGE |
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50 /** |
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51 Used to create an instance of CCmdCustomCommand class from given parameters. |
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52 This method is used by SsmCommandFactory to create a command. |
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53 |
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54 @param aSeverity The severity of the command |
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55 @param aExecutionBehaviour Execution behaviour of this command |
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56 @param aInfo CustomCommand-specific info |
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57 @param aPriority The priority of the command in the list |
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58 @return A pointer to an object of type CCmdCustomCommand. |
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59 */ |
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60 CCmdCustomCommand* CCmdCustomCommand::NewL(TCmdErrorSeverity aSeverity, TSsmExecutionBehaviour aExecutionBehaviour, |
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61 const CSsmCustomCommandInfo& aInfo, const TUint16 aPriority) |
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62 { |
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63 CCmdCustomCommand* self = new (ELeave) CCmdCustomCommand(aSeverity, aExecutionBehaviour, aPriority); |
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64 CleanupStack::PushL(self); |
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65 self->ConstructL(aInfo); |
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66 CleanupStack::Pop(self); |
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67 return self; |
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68 } |
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69 #endif |
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70 |
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71 /** |
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72 Used to create an instance of CCmdCustomCommand class from given parameters. |
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73 This method is used by SsmCommandFactory to create a command. |
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74 |
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75 @param aSeverity The severity of the command |
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76 @param aExecutionBehaviour Execution behaviour of this command |
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77 @param aInfo CustomCommand-specific info |
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78 @return A pointer to an object of type CCmdCustomCommand. |
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79 */ |
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80 CCmdCustomCommand* CCmdCustomCommand::NewL(TCmdErrorSeverity aSeverity, TSsmExecutionBehaviour aExecutionBehaviour, const CSsmCustomCommandInfo& aInfo) |
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81 { |
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82 CCmdCustomCommand* self = new (ELeave) CCmdCustomCommand(aSeverity, aExecutionBehaviour); |
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83 CleanupStack::PushL(self); |
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84 self->ConstructL(aInfo); |
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85 CleanupStack::Pop(self); |
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86 return self; |
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87 } |
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88 |
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89 /** |
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90 Used to create an instance of CCmdCustomCommand class from resource. |
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91 |
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92 @param aCommandParameters Object data from a resource file |
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93 @return A pointer to an object of type CCmdCustomCommand. |
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94 */ |
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95 CCmdCustomCommand* CCmdCustomCommand::NewL(TSsmCommandParameters& aCommandParameters) |
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96 { |
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97 CCmdCustomCommand* self = new (ELeave) CCmdCustomCommand(); |
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98 CleanupStack::PushL(self); |
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99 self->ConstructL(aCommandParameters); |
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100 CleanupStack::Pop(self); |
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101 return self; |
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102 } |
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103 |
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104 /** |
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105 Used to create an instance of CCmdCustomCommand class from CCmdCustomCommand object |
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106 Must be used only by CLE |
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107 @param aCmdCustomCommand CCmdCustomCommand reference |
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108 @param aUtilProvider CSsmCommandUtilProvider reference |
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109 @return A pointer to an object of type CCmdCustomCommand. |
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110 */ |
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111 CCmdCustomCommand* CCmdCustomCommand::NewLC(const CCmdCustomCommand& aCmdCustomCommand, CSsmCommandUtilProvider* aUtilProvider) |
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112 { |
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113 #ifdef SYMBIAN_SSM_FLEXIBLE_MERGE |
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114 CCmdCustomCommand* self = new (ELeave) CCmdCustomCommand(aCmdCustomCommand.Severity(),aCmdCustomCommand.ExecutionBehaviour(), |
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115 aCmdCustomCommand.Priority()); |
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116 #else |
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117 CCmdCustomCommand* self = new (ELeave) CCmdCustomCommand(aCmdCustomCommand.Severity(),aCmdCustomCommand.ExecutionBehaviour()); |
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118 #endif |
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119 CleanupStack::PushL(self); |
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120 self->ConstructL(aCmdCustomCommand, aUtilProvider); |
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121 return self; |
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122 } |
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123 |
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124 void CCmdCustomCommand::ConstructL(const CCmdCustomCommand& aCmdCustomCommand, CSsmCommandUtilProvider* aUtilProvider) |
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125 { |
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126 iConditionalResourceId = aCmdCustomCommand.ConditionalInformation(); |
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127 SetUtilProvider(*aUtilProvider); |
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128 #ifdef SYMBIAN_SSM_FLEXIBLE_MERGE |
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129 if (iConditionalResourceId != 0) |
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130 { |
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131 SetCommandResourceFileNameL(aCmdCustomCommand.GetCommandResourceFileName()); |
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132 } |
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133 #endif |
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134 iInfo = new (ELeave) CSsmCustomCommandInfo(); |
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135 (*iInfo) = aCmdCustomCommand.SsmCustomCommandInfo(); |
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136 } |
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137 |
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138 /** |
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139 Destructor |
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140 */ |
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141 CCmdCustomCommand::~CCmdCustomCommand() |
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142 { |
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143 Cancel(); |
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144 |
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145 if (iCustomCommand) // we requested it so we are responsible for deleting it |
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146 { |
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147 iCustomCommand->Release(); |
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148 } |
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149 |
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150 if (iInfo) |
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151 { |
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152 // release the DLL if instructed, DLL's with ENeverUnload option needs unloading atleast when the server dies. |
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153 if (iInfo->Unloading() == EUnloadOnCommandCompletion) |
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154 { |
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155 iLibrary.Close(); |
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156 } |
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157 |
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158 delete iInfo; |
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159 } |
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160 if(iCmdEnv) |
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161 { |
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162 delete iCmdEnv; |
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163 } |
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164 } |
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165 |
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166 /** |
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167 Initialises the BIC's active object and initiates the command |
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168 |
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169 @param aStatus the TRequestStatus of the active object calling this BIC |
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170 */ |
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171 void CCmdCustomCommand::Execute(TRequestStatus& aStatus) |
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172 { |
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173 aStatus = KRequestPending; |
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174 iExecuteRequest = &aStatus; |
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175 iAction = EPrepareDll; |
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176 |
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177 if (iExecutionBehaviour != ESsmWaitForSignal) |
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178 { |
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179 CompleteExecuteRequest(KErrNone); |
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180 } |
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181 |
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182 CompleteRequest(iStatus, KErrNone); |
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183 SetActive(); |
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184 } |
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185 |
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186 /** |
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187 Releases resources associated with this BIC |
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188 */ |
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189 void CCmdCustomCommand::Release() |
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190 { |
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191 delete this; |
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192 } |
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193 |
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194 /** |
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195 Initiates a Cancel on the object. |
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196 */ |
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197 void CCmdCustomCommand::ExecuteCancel() |
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198 { |
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199 Cancel(); |
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200 CompleteDeferredExecuteRequest(KErrCancel); |
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201 } |
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202 |
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203 /** |
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204 Returns the type of the BIC |
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205 |
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206 @return The type of the BIC |
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207 */ |
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208 TSsmCommandType CCmdCustomCommand::Type() const |
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209 { |
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210 return (ESsmCmdCustomCommand); |
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211 } |
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212 |
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213 /** |
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214 Returns the Version of the BIC |
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215 |
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216 @return The maximum supported version of the BIC |
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217 */ |
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218 TInt CCmdCustomCommand::MaxSupportedVersion() |
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219 { |
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220 #ifdef SYMBIAN_SSM_FLEXIBLE_MERGE |
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221 return (static_cast<TInt>(ECmdCustomCommandVersionWithPriority)); |
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222 #else |
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223 return (static_cast<TInt>(ECmdCustomCommandInitialVersion)); |
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224 #endif |
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225 } |
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226 |
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227 /** |
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228 Configures the BIC using data contained in a ReadStream |
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229 |
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230 @param aReadStream A read stream containing BIC data |
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231 */ |
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232 void CCmdCustomCommand::InternalizeL(RReadStream& aReadStream) |
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233 { |
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234 iSeverity = static_cast<TCmdErrorSeverity>(aReadStream.ReadInt16L()); |
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235 iExecutionBehaviour = static_cast<TSsmExecutionBehaviour>(aReadStream.ReadUint8L()); |
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236 |
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237 iInfo = new (ELeave) CSsmCustomCommandInfo(); |
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238 iInfo->InternalizeL(aReadStream); |
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239 #ifdef SYMBIAN_SSM_FLEXIBLE_MERGE |
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240 iPriority = aReadStream.ReadUint16L(); |
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241 #endif |
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242 } |
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243 |
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244 /** |
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245 Externalises the configuration of the BIC |
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246 |
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247 @param aWriteStream A write stream to write BIC data to |
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248 @leave One of the system-wide error codes. |
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249 */ |
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250 void CCmdCustomCommand::ExternalizeL(RWriteStream& aWriteStream) const |
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251 { |
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252 aWriteStream.WriteInt16L(iSeverity); |
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253 aWriteStream.WriteUint8L(iExecutionBehaviour); |
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254 iInfo->ExternalizeL(aWriteStream); |
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255 #ifdef SYMBIAN_SSM_FLEXIBLE_MERGE |
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256 aWriteStream.WriteUint16L(iPriority); |
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257 #endif |
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258 } |
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259 |
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260 /** |
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261 Performs the tasks of the BIC |
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262 |
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263 @leave One of the system-wide error codes. |
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264 */ |
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265 void CCmdCustomCommand::RunL() |
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266 { |
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267 switch(iAction) |
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268 { |
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269 case EPrepareDll: |
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270 { |
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271 PrepareCustomCmdL(); |
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272 break; |
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273 } |
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274 case EInitialiseDll: |
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275 { |
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276 InitialiseCmdL(); |
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277 break; |
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278 } |
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279 case EExecuteMethod: |
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280 { |
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281 SSMLOGLEAVEIFNULL(iCustomCommand); |
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282 iCustomCommand->Execute(iInfo->Params(), iStatus); |
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283 MoveToNextStateL(KErrNone, EClose, EFalse); // custom command will complete this request |
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284 break; |
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285 } |
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286 case EClose: |
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287 { |
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288 TInt err = iStatus.Int(); |
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289 if (err != KErrNone) |
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290 { |
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291 // custom cmd call failed so try it again |
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292 MoveToNextStateL(err, EExecuteMethod); |
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293 } |
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294 else |
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295 { |
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296 SSMLOGLEAVEIFNULL(iCustomCommand); |
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297 iCustomCommand->Close(); |
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298 CompleteDeferredExecuteRequest(KErrNone); // success |
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299 } |
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300 break; |
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301 } |
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302 default: |
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303 { |
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304 PanicNow(KPanicCmdCustomCommand, EInvalidRunLAction); |
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305 break; |
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306 } |
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307 }; |
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308 } |
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309 |
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310 /** |
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311 Called to handle any cleanup if RunL leaves |
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312 |
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313 @param aError The error to finish with |
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314 @return KErrNone |
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315 */ |
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316 TInt CCmdCustomCommand::RunError(TInt aError) |
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317 { |
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318 CompleteDeferredExecuteRequest(aError); |
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319 return KErrNone; |
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320 } |
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321 |
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322 /** |
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323 Called during cancellation of the active BIC |
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324 */ |
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325 void CCmdCustomCommand::DoCancel() |
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326 { |
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327 if (iCustomCommand) // only cancel if Execute has been called |
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328 { |
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329 iCustomCommand->ExecuteCancel(); |
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330 } |
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331 } |
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332 |
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333 /** |
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334 Default Constructor. |
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335 */ |
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336 CCmdCustomCommand::CCmdCustomCommand() |
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337 { |
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338 } |
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339 |
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340 #ifdef SYMBIAN_SSM_FLEXIBLE_MERGE |
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341 /** |
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342 Overloaded constructor. |
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343 @param aSeverity The severity of the command |
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344 @param aExecutionBehaviour The execution behaviour of the command |
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345 @param aPriority The priority of the command in the list |
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346 */ |
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347 CCmdCustomCommand::CCmdCustomCommand(TCmdErrorSeverity aSeverity, TSsmExecutionBehaviour aExecutionBehaviour,const TUint16 aPriority) |
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348 : CSsmDeferrableCommand(aSeverity, aExecutionBehaviour, aPriority) |
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349 { |
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350 } |
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351 #endif |
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352 |
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353 /** |
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354 Overloaded constructor. |
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355 @param aSeverity The severity of the command |
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356 @param aExecutionBehaviour The execution behaviour of the command |
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357 */ |
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358 CCmdCustomCommand::CCmdCustomCommand(TCmdErrorSeverity aSeverity, TSsmExecutionBehaviour aExecutionBehaviour) |
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359 : CSsmDeferrableCommand(aSeverity, aExecutionBehaviour) |
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360 { |
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361 } |
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362 |
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363 /** |
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364 Constructs the object from custom command info. |
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365 @param aInfo A custom command info object containing BIC data |
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366 */ |
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367 void CCmdCustomCommand::ConstructL(const CSsmCustomCommandInfo& aInfo) |
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368 { |
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369 iInfo = new (ELeave) CSsmCustomCommandInfo(); |
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370 (*iInfo) = aInfo; |
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371 ValidateL(); |
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372 } |
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373 |
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374 /** |
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375 Constructs the object through read stream. |
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376 @param aReadStream A read stream containing BIC data |
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377 */ |
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378 void CCmdCustomCommand::ConstructL(RReadStream& aReadStream) |
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379 { |
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380 InternalizeL(aReadStream); |
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381 ValidateL(); |
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382 } |
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383 |
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384 /** |
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385 Constructs an object from resource file. |
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386 @param aCommandParameters Object data from a resource file |
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387 */ |
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388 void CCmdCustomCommand::ConstructL(TSsmCommandParameters& aCommandParameters) |
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389 { |
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390 RResourceReader& reader = aCommandParameters.MainReader(); |
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391 const TSsmCommandType type = static_cast<TSsmCommandType>(reader.ReadInt16L()); |
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392 SSMLOGLEAVEIFFALSE(type == Type(), KErrNotSupported); |
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393 const TInt version = reader.ReadInt16L(); |
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394 SSMLOGLEAVEIFFALSE(__COMPARE_VERSION(version, CCmdCustomCommand::MaxSupportedVersion()), KErrNotSupported); |
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395 iSeverity = static_cast<TCmdErrorSeverity>(reader.ReadInt16L()); |
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396 iExecutionBehaviour = static_cast<TSsmExecutionBehaviour>(reader.ReadUint8L()); |
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397 const TPtrC name = reader.ReadTPtrCL(); |
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398 const TInt32 ordinal = reader.ReadInt32L(); |
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399 TCmdCustomCommandLibUnloading unloading = static_cast<TCmdCustomCommandLibUnloading>(reader.ReadUint8L()); |
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400 TInt16 retries = reader.ReadInt16L(); |
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401 |
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402 // read dll data |
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403 const TInt32 paramDataId = reader.ReadUint32L(); |
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404 HBufC8* params = NULL; |
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405 if (paramDataId > 0) |
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406 { |
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407 params = aCommandParameters.AllocBufferForResourceIdL(paramDataId); |
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408 } |
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409 else |
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410 { |
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411 params = HBufC8::NewL(0); |
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412 } |
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413 CleanupStack::PushL(params); |
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414 |
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415 iInfo = new (ELeave) CSsmCustomCommandInfo(); |
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416 iInfo->SetL(name, ordinal, unloading, retries, *params); |
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417 |
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418 ValidateL(); |
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419 CleanupStack::PopAndDestroy(params); |
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420 #ifdef SYMBIAN_SSM_FLEXIBLE_MERGE |
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421 iPriority = (version > ECmdCustomCommandInitialVersion) ? reader.ReadUint16L() : KDefaultCommandPriority; |
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422 #endif |
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423 } |
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424 |
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425 /** |
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426 Loads and sets up the custom command dll |
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427 */ |
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428 void CCmdCustomCommand::PrepareCustomCmdL() |
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429 { |
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430 TInt err = KErrNone; |
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431 if (!iLoaded) |
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432 { |
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433 // load the dll |
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434 DEBUGPRINT2(_L("Loading library %S..."), &iInfo->FileName()); |
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435 err = iLibrary.Load(iInfo->FileName()); |
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436 if (err == KErrNone) |
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437 { |
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438 iLoaded = ETrue; |
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439 if(iInfo->Unloading() == ENeverUnload) |
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440 { |
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441 //Record the handle into the file. |
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442 //If it fails to write the handle, ignore it. |
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443 //We don't want to stop the processing of the command due to this failure. |
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444 TRAP_IGNORE(WriteHandleToFileL(iLibrary.Handle())); |
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445 } |
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446 } |
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447 } |
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448 |
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449 if (iLoaded) |
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450 { |
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451 err = KErrNotFound; |
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452 |
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453 // get a pointer to the function |
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454 DEBUGPRINT2A("Looking up ordinal %d...", iInfo->Ordinal()); |
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455 TLibraryFunction function = iLibrary.Lookup(iInfo->Ordinal()); |
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456 if (function) |
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457 { |
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458 // cast the pointer to our custom cmd type |
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459 CustomCmdFunctionType customCmdFunction = reinterpret_cast<CustomCmdFunctionType>(function); |
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460 iCustomCommand = (*customCmdFunction)(); |
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461 if (iCustomCommand) |
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462 { |
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463 err = KErrNone; |
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464 } |
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465 } |
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466 } |
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467 |
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468 MoveToNextStateL(err, EInitialiseDll); |
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469 } |
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470 |
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471 void CCmdCustomCommand::WriteHandleToFileL(TInt aHandle) |
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472 { |
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473 const TChar sysDrive = RFs::GetSystemDriveChar(); |
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474 RBuf filename; |
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475 filename.CreateL(KNeverUnloadLibHandleFile().Length() + 1); |
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476 filename.Append(sysDrive); |
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477 filename.Append(KNeverUnloadLibHandleFile()); |
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478 filename.CleanupClosePushL(); |
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479 RFs fs; |
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480 User::LeaveIfError(fs.Connect()); |
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481 CleanupClosePushL(fs); |
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482 |
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483 fs.MkDirAll(filename); // ignore any error |
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484 RFile file; |
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485 CleanupClosePushL(file); |
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486 TInt err=KErrNone; |
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487 TInt pos = 0; |
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488 if(KErrNotFound == (err = file.Open(fs, filename, EFileShareExclusive|EFileStream|EFileWrite))) |
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489 { |
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490 User::LeaveIfError(file.Replace(fs, filename, EFileShareExclusive|EFileStream|EFileWrite)); |
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491 } |
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492 else |
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493 { |
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494 User::LeaveIfError(err); |
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495 file.Seek(ESeekEnd, pos); |
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496 } |
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497 RFileWriteStream targetStream; |
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498 targetStream.Attach(file, pos); // file gets closed by this call, but that's okay, we don't need it any more (targetStream has its own copy of this RFile object that it owns) |
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499 CleanupClosePushL(targetStream); |
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500 targetStream.WriteInt32L(aHandle); |
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501 targetStream.CommitL(); |
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502 CleanupStack::PopAndDestroy(4); |
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503 } |
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504 |
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505 /** |
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506 Calls the Initialize() method on the DLL |
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507 */ |
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508 void CCmdCustomCommand::InitialiseCmdL() |
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509 { |
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510 SSMLOGLEAVEIFNULL(iCustomCommand); |
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511 SSMLOGLEAVEIFNULL(iUtilProvider); |
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512 iCmdEnv = CSsmCustomCommandEnv::NewL(iUtilProvider->RfsL()); |
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513 TInt err = iCustomCommand->Initialize(iCmdEnv); |
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514 if (err!=KErrNone) |
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515 { |
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516 iCustomCommand->Close(); |
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517 delete iCmdEnv; |
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518 iCmdEnv=NULL; |
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519 } |
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520 MoveToNextStateL(err, EExecuteMethod); |
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521 } |
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522 |
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523 /** |
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524 Sets the command up to run for another iteration |
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525 */ |
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526 void CCmdCustomCommand::MoveToNextStateL(TInt aError, TCustomCmdAction aNextState, TBool aCompleteRequest) |
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527 { |
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528 if (aError == KErrNone) |
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529 { |
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530 iAction = aNextState; |
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531 } |
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532 else |
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533 { |
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534 if (++iAttempts >= iInfo->Retries()) |
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535 { |
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536 DEBUGPRINT4A("Error encountered %d attempt %d retries %d", aError, iAttempts, iInfo->Retries()); |
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537 SSMLOGLEAVE(aError); |
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538 } |
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539 } |
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540 |
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541 if (aCompleteRequest) |
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542 { |
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543 CompleteRequest(iStatus, aError); |
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544 } |
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545 |
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546 SetActive(); |
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547 } |
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548 |
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549 /** |
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550 Performs command-specific validation |
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551 */ |
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552 void CCmdCustomCommand::ValidateL() |
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553 { |
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554 CSsmDeferrableCommand::ValidateL(); |
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555 |
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556 SSMLOGLEAVEIFFALSE(iInfo->FileName().Length()>0, KErrArgument); |
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557 SSMLOGLEAVEIFFALSE(iInfo->Ordinal()>0, KErrArgument); |
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558 SSMLOGLEAVEIFFALSE(iInfo->Unloading()>=EUnloadOnCommandCompletion, KErrArgument); |
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559 SSMLOGLEAVEIFFALSE(iInfo->Unloading()<=ENeverUnload, KErrArgument); |
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560 SSMLOGLEAVEIFFALSE(iInfo->Retries()>=0, KErrArgument); |
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561 } |
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562 |