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ShellPkg: Refactor string manipulation

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This patch replaces StrCpy with StrnCpy or refactors out the usage of StrCpy through some other means.
This patch replaces StrCat with StrnCat or refactors out the usage of StrCat through some other means.


Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16038 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Jaben Carsey
2014-09-02 20:17:38 +00:00
committed by jcarsey
parent 8ac6e336ff
commit 7f79b01e8e
7 changed files with 115 additions and 98 deletions
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46
ShellPkg/Application/Shell/ShellEnvVar.c
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@ -152,7 +152,7 @@ GetEnvironmentVariableList(
if (VariableName == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
StrCpy(VariableName, L"");
*VariableName = CHAR_NULL;
while (!EFI_ERROR(Status)) {
NameSize = (UINTN)MaxVarSize;
@ -178,13 +178,12 @@ GetEnvironmentVariableList(
}
}
if (!EFI_ERROR(Status) && VarList != NULL) {
VarList->Key = AllocateZeroPool(StrSize(VariableName));
VarList->Key = AllocateCopyPool(StrSize(VariableName), VariableName);
if (VarList->Key == NULL) {
SHELL_FREE_NON_NULL(VarList->Val);
SHELL_FREE_NON_NULL(VarList);
Status = EFI_OUT_OF_RESOURCES;
} else {
StrCpy(VarList->Key, VariableName);
InsertTailList(ListHead, &VarList->Link);
}
}
@ -286,7 +285,6 @@ SetEnvironmentVariables(
UINTN CurrentCount;
ENV_VAR_LIST *VarList;
ENV_VAR_LIST *Node;
UINTN NewSize;
VarList = NULL;
@ -307,20 +305,44 @@ SetEnvironmentVariables(
}
ASSERT(StrStr(CurrentString, L"=") != NULL);
Node = AllocateZeroPool(sizeof(ENV_VAR_LIST));
ASSERT(Node != NULL);
if (Node == NULL) {
SetEnvironmentVariableList(&VarList->Link);
return (EFI_OUT_OF_RESOURCES);
}
Node->Key = AllocateZeroPool((StrStr(CurrentString, L"=") - CurrentString + 1) * sizeof(CHAR16));
ASSERT(Node->Key != NULL);
if (Node->Key == NULL) {
SHELL_FREE_NON_NULL(Node);
SetEnvironmentVariableList(&VarList->Link);
return (EFI_OUT_OF_RESOURCES);
}
//
// Copy the string into the Key, leaving the last character allocated as NULL to terminate
//
StrnCpy(Node->Key, CurrentString, StrStr(CurrentString, L"=") - CurrentString);
NewSize = StrSize(CurrentString);
NewSize -= StrLen(Node->Key) - 1;
Node->Val = AllocateZeroPool(NewSize);
ASSERT(Node->Val != NULL);
StrCpy(Node->Val, CurrentString + StrLen(Node->Key) + 1);
//
// ValueSize = TotalSize - already removed size - size for '=' + size for terminator (the last 2 items cancel each other)
//
Node->Val = AllocateCopyPool(StrSize(CurrentString) - StrSize(Node->Key), CurrentString + StrLen(Node->Key) + 1);
if (Node->Val == NULL) {
SHELL_FREE_NON_NULL(Node->Key);
SHELL_FREE_NON_NULL(Node);
SetEnvironmentVariableList(&VarList->Link);
return (EFI_OUT_OF_RESOURCES);
}
Node->Atts = EFI_VARIABLE_BOOTSERVICE_ACCESS;
if (VarList == NULL) {
VarList = AllocateZeroPool(sizeof(ENV_VAR_LIST));
ASSERT(VarList != NULL);
if (VarList == NULL) {
SHELL_FREE_NON_NULL(Node->Key);
SHELL_FREE_NON_NULL(Node->Val);
SHELL_FREE_NON_NULL(Node);
return (EFI_OUT_OF_RESOURCES);
}
InitializeListHead(&VarList->Link);
}
InsertTailList(&VarList->Link, &Node->Link);