/** @file\r
function declarations for shell environment functions.\r
\r
- Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>\r
+ Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
\r
#include "Shell.h"\r
\r
+#define INIT_NAME_BUFFER_SIZE 128\r
+#define INIT_DATA_BUFFER_SIZE 1024\r
+\r
/**\r
Reports whether an environment variable is Volatile or Non-Volatile.\r
\r
{\r
CHAR16 *VariableName;\r
UINTN NameSize;\r
- UINT64 MaxStorSize;\r
- UINT64 RemStorSize;\r
- UINT64 MaxVarSize;\r
+ UINTN NameBufferSize;\r
EFI_STATUS Status;\r
EFI_GUID Guid;\r
UINTN ValSize;\r
+ UINTN ValBufferSize;\r
ENV_VAR_LIST *VarList;\r
\r
if (ListHead == NULL) {\r
return (EFI_INVALID_PARAMETER);\r
}\r
-\r
- if (gRT->Hdr.Revision >= EFI_2_00_SYSTEM_TABLE_REVISION) {\r
- Status = gRT->QueryVariableInfo(EFI_VARIABLE_NON_VOLATILE|EFI_VARIABLE_BOOTSERVICE_ACCESS, &MaxStorSize, &RemStorSize, &MaxVarSize);\r
- if (EFI_ERROR(Status)) {\r
- return (Status);\r
- }\r
- } else {\r
- Status = EFI_SUCCESS;\r
- MaxVarSize = 16384;\r
- }\r
-\r
- NameSize = (UINTN)MaxVarSize;\r
- VariableName = AllocateZeroPool(NameSize);\r
+ \r
+ Status = EFI_SUCCESS;\r
+ \r
+ ValBufferSize = INIT_DATA_BUFFER_SIZE;\r
+ NameBufferSize = INIT_NAME_BUFFER_SIZE;\r
+ VariableName = AllocateZeroPool(NameBufferSize);\r
if (VariableName == NULL) {\r
return (EFI_OUT_OF_RESOURCES);\r
}\r
- StrCpy(VariableName, L"");\r
+ *VariableName = CHAR_NULL;\r
\r
while (!EFI_ERROR(Status)) {\r
- NameSize = (UINTN)MaxVarSize;\r
+ NameSize = NameBufferSize;\r
Status = gRT->GetNextVariableName(&NameSize, VariableName, &Guid);\r
if (Status == EFI_NOT_FOUND){\r
Status = EFI_SUCCESS;\r
break;\r
+ } else if (Status == EFI_BUFFER_TOO_SMALL) {\r
+ NameBufferSize = NameSize > NameBufferSize * 2 ? NameSize : NameBufferSize * 2;\r
+ SHELL_FREE_NON_NULL(VariableName);\r
+ VariableName = AllocateZeroPool(NameBufferSize);\r
+ if (VariableName == NULL) {\r
+ Status = EFI_OUT_OF_RESOURCES;\r
+ break;\r
+ }\r
+ NameSize = NameBufferSize;\r
+ Status = gRT->GetNextVariableName(&NameSize, VariableName, &Guid);\r
}\r
+ \r
if (!EFI_ERROR(Status) && CompareGuid(&Guid, &gShellVariableGuid)){\r
VarList = AllocateZeroPool(sizeof(ENV_VAR_LIST));\r
if (VarList == NULL) {\r
Status = EFI_OUT_OF_RESOURCES;\r
} else {\r
- ValSize = 0;\r
+ ValSize = ValBufferSize;\r
+ VarList->Val = AllocateZeroPool(ValSize);\r
+ if (VarList->Val == NULL) {\r
+ SHELL_FREE_NON_NULL(VarList);\r
+ Status = EFI_OUT_OF_RESOURCES;\r
+ break;\r
+ }\r
Status = SHELL_GET_ENVIRONMENT_VARIABLE_AND_ATTRIBUTES(VariableName, &VarList->Atts, &ValSize, VarList->Val);\r
if (Status == EFI_BUFFER_TOO_SMALL){\r
- VarList->Val = AllocateZeroPool(ValSize);\r
+ ValBufferSize = ValSize > ValBufferSize * 2 ? ValSize : ValBufferSize * 2;\r
+ SHELL_FREE_NON_NULL (VarList->Val);\r
+ VarList->Val = AllocateZeroPool(ValBufferSize);\r
if (VarList->Val == NULL) {\r
SHELL_FREE_NON_NULL(VarList);\r
Status = EFI_OUT_OF_RESOURCES;\r
- } else {\r
- Status = SHELL_GET_ENVIRONMENT_VARIABLE_AND_ATTRIBUTES(VariableName, &VarList->Atts, &ValSize, VarList->Val);\r
+ break;\r
}\r
+ \r
+ ValSize = ValBufferSize;\r
+ Status = SHELL_GET_ENVIRONMENT_VARIABLE_AND_ATTRIBUTES(VariableName, &VarList->Atts, &ValSize, VarList->Val);\r
}\r
- if (!EFI_ERROR(Status) && VarList != NULL) {\r
- VarList->Key = AllocateZeroPool(StrSize(VariableName));\r
+ if (!EFI_ERROR(Status)) {\r
+ VarList->Key = AllocateCopyPool(StrSize(VariableName), VariableName);\r
if (VarList->Key == NULL) {\r
SHELL_FREE_NON_NULL(VarList->Val);\r
SHELL_FREE_NON_NULL(VarList);\r
Status = EFI_OUT_OF_RESOURCES;\r
} else {\r
- StrCpy(VarList->Key, VariableName);\r
InsertTailList(ListHead, &VarList->Link);\r
}\r
+ } else {\r
+ SHELL_FREE_NON_NULL(VarList->Val);\r
+ SHELL_FREE_NON_NULL(VarList);\r
}\r
- }\r
+ } // if (VarList == NULL) ... else ...\r
} // compare guid\r
} // while\r
- FreePool(VariableName);\r
+ SHELL_FREE_NON_NULL (VariableName);\r
\r
if (EFI_ERROR(Status)) {\r
FreeEnvironmentVariableList(ListHead);\r
UINTN CurrentCount;\r
ENV_VAR_LIST *VarList;\r
ENV_VAR_LIST *Node;\r
- UINTN NewSize;\r
\r
VarList = NULL;\r
\r
}\r
ASSERT(StrStr(CurrentString, L"=") != NULL);\r
Node = AllocateZeroPool(sizeof(ENV_VAR_LIST));\r
- ASSERT(Node != NULL);\r
+ if (Node == NULL) {\r
+ SetEnvironmentVariableList(&VarList->Link);\r
+ return (EFI_OUT_OF_RESOURCES);\r
+ }\r
+\r
Node->Key = AllocateZeroPool((StrStr(CurrentString, L"=") - CurrentString + 1) * sizeof(CHAR16));\r
- ASSERT(Node->Key != NULL);\r
+ if (Node->Key == NULL) {\r
+ SHELL_FREE_NON_NULL(Node);\r
+ SetEnvironmentVariableList(&VarList->Link);\r
+ return (EFI_OUT_OF_RESOURCES);\r
+ }\r
+\r
+ //\r
+ // Copy the string into the Key, leaving the last character allocated as NULL to terminate\r
+ //\r
StrnCpy(Node->Key, CurrentString, StrStr(CurrentString, L"=") - CurrentString);\r
- NewSize = StrSize(CurrentString);\r
- NewSize -= StrLen(Node->Key) - 1;\r
- Node->Val = AllocateZeroPool(NewSize);\r
- ASSERT(Node->Val != NULL);\r
- StrCpy(Node->Val, CurrentString + StrLen(Node->Key) + 1);\r
+\r
+ //\r
+ // ValueSize = TotalSize - already removed size - size for '=' + size for terminator (the last 2 items cancel each other)\r
+ //\r
+ Node->Val = AllocateCopyPool(StrSize(CurrentString) - StrSize(Node->Key), CurrentString + StrLen(Node->Key) + 1);\r
+ if (Node->Val == NULL) {\r
+ SHELL_FREE_NON_NULL(Node->Key);\r
+ SHELL_FREE_NON_NULL(Node);\r
+ SetEnvironmentVariableList(&VarList->Link);\r
+ return (EFI_OUT_OF_RESOURCES);\r
+ }\r
+\r
Node->Atts = EFI_VARIABLE_BOOTSERVICE_ACCESS;\r
\r
if (VarList == NULL) {\r
VarList = AllocateZeroPool(sizeof(ENV_VAR_LIST));\r
- ASSERT(VarList != NULL);\r
+ if (VarList == NULL) {\r
+ SHELL_FREE_NON_NULL(Node->Key);\r
+ SHELL_FREE_NON_NULL(Node->Val);\r
+ SHELL_FREE_NON_NULL(Node);\r
+ return (EFI_OUT_OF_RESOURCES);\r
+ }\r
InitializeListHead(&VarList->Link);\r
}\r
InsertTailList(&VarList->Link, &Node->Link);\r
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