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-rw-r--r--ShellPkg/Application/Shell/ShellEnvVar.c69
-rw-r--r--ShellPkg/Application/Shell/ShellProtocol.c41
2 files changed, 72 insertions, 38 deletions
diff --git a/ShellPkg/Application/Shell/ShellEnvVar.c b/ShellPkg/Application/Shell/ShellEnvVar.c
index b94711142a..de09174c62 100644
--- a/ShellPkg/Application/Shell/ShellEnvVar.c
+++ b/ShellPkg/Application/Shell/ShellEnvVar.c
@@ -1,7 +1,7 @@
/** @file
function declarations for shell environment functions.
- Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -14,6 +14,9 @@
#include "Shell.h"
+#define INIT_NAME_BUFFER_SIZE 128
+#define INIT_DATA_BUFFER_SIZE 1024
+
/**
Reports whether an environment variable is Volatile or Non-Volatile.
@@ -125,59 +128,72 @@ GetEnvironmentVariableList(
{
CHAR16 *VariableName;
UINTN NameSize;
- UINT64 MaxStorSize;
- UINT64 RemStorSize;
- UINT64 MaxVarSize;
+ UINTN NameBufferSize;
EFI_STATUS Status;
EFI_GUID Guid;
UINTN ValSize;
+ UINTN ValBufferSize;
ENV_VAR_LIST *VarList;
if (ListHead == NULL) {
return (EFI_INVALID_PARAMETER);
}
-
- if (gRT->Hdr.Revision >= EFI_2_00_SYSTEM_TABLE_REVISION) {
- Status = gRT->QueryVariableInfo(EFI_VARIABLE_NON_VOLATILE|EFI_VARIABLE_BOOTSERVICE_ACCESS, &MaxStorSize, &RemStorSize, &MaxVarSize);
- if (EFI_ERROR(Status)) {
- return (Status);
- }
- } else {
- Status = EFI_SUCCESS;
- MaxVarSize = 16384;
- }
-
- NameSize = (UINTN)MaxVarSize;
- VariableName = AllocateZeroPool(NameSize);
+
+ Status = EFI_SUCCESS;
+
+ ValBufferSize = INIT_DATA_BUFFER_SIZE;
+ NameBufferSize = INIT_NAME_BUFFER_SIZE;
+ VariableName = AllocateZeroPool(NameBufferSize);
if (VariableName == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
*VariableName = CHAR_NULL;
while (!EFI_ERROR(Status)) {
- NameSize = (UINTN)MaxVarSize;
+ NameSize = NameBufferSize;
Status = gRT->GetNextVariableName(&NameSize, VariableName, &Guid);
if (Status == EFI_NOT_FOUND){
Status = EFI_SUCCESS;
break;
+ } else if (Status == EFI_BUFFER_TOO_SMALL) {
+ NameBufferSize = NameSize > NameBufferSize * 2 ? NameSize : NameBufferSize * 2;
+ SHELL_FREE_NON_NULL(VariableName);
+ VariableName = AllocateZeroPool(NameBufferSize);
+ if (VariableName == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ break;
+ }
+ NameSize = NameBufferSize;
+ Status = gRT->GetNextVariableName(&NameSize, VariableName, &Guid);
}
+
if (!EFI_ERROR(Status) && CompareGuid(&Guid, &gShellVariableGuid)){
VarList = AllocateZeroPool(sizeof(ENV_VAR_LIST));
if (VarList == NULL) {
Status = EFI_OUT_OF_RESOURCES;
} else {
- ValSize = 0;
+ ValSize = ValBufferSize;
+ VarList->Val = AllocateZeroPool(ValSize);
+ if (VarList->Val == NULL) {
+ SHELL_FREE_NON_NULL(VarList);
+ Status = EFI_OUT_OF_RESOURCES;
+ break;
+ }
Status = SHELL_GET_ENVIRONMENT_VARIABLE_AND_ATTRIBUTES(VariableName, &VarList->Atts, &ValSize, VarList->Val);
if (Status == EFI_BUFFER_TOO_SMALL){
- VarList->Val = AllocateZeroPool(ValSize);
+ ValBufferSize = ValSize > ValBufferSize * 2 ? ValSize : ValBufferSize * 2;
+ SHELL_FREE_NON_NULL (VarList->Val);
+ VarList->Val = AllocateZeroPool(ValBufferSize);
if (VarList->Val == NULL) {
SHELL_FREE_NON_NULL(VarList);
Status = EFI_OUT_OF_RESOURCES;
- } else {
- Status = SHELL_GET_ENVIRONMENT_VARIABLE_AND_ATTRIBUTES(VariableName, &VarList->Atts, &ValSize, VarList->Val);
+ break;
}
+
+ ValSize = ValBufferSize;
+ Status = SHELL_GET_ENVIRONMENT_VARIABLE_AND_ATTRIBUTES(VariableName, &VarList->Atts, &ValSize, VarList->Val);
}
- if (!EFI_ERROR(Status) && VarList != NULL) {
+ if (!EFI_ERROR(Status)) {
VarList->Key = AllocateCopyPool(StrSize(VariableName), VariableName);
if (VarList->Key == NULL) {
SHELL_FREE_NON_NULL(VarList->Val);
@@ -186,11 +202,14 @@ GetEnvironmentVariableList(
} else {
InsertTailList(ListHead, &VarList->Link);
}
+ } else {
+ SHELL_FREE_NON_NULL(VarList->Val);
+ SHELL_FREE_NON_NULL(VarList);
}
- }
+ } // if (VarList == NULL) ... else ...
} // compare guid
} // while
- FreePool(VariableName);
+ SHELL_FREE_NON_NULL (VariableName);
if (EFI_ERROR(Status)) {
FreeEnvironmentVariableList(ListHead);
diff --git a/ShellPkg/Application/Shell/ShellProtocol.c b/ShellPkg/Application/Shell/ShellProtocol.c
index 6fc566856f..72d42d7222 100644
--- a/ShellPkg/Application/Shell/ShellProtocol.c
+++ b/ShellPkg/Application/Shell/ShellProtocol.c
@@ -3,7 +3,7 @@
manipulation, and initialization of EFI_SHELL_PROTOCOL.
(C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
- Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -16,6 +16,8 @@
#include "Shell.h"
+#define INIT_NAME_BUFFER_SIZE 128
+
/**
Close an open file handle.
@@ -3102,20 +3104,17 @@ EFIAPI
InternalEfiShellGetListAlias(
)
{
- UINT64 MaxStorSize;
- UINT64 RemStorSize;
- UINT64 MaxVarSize;
+
EFI_STATUS Status;
EFI_GUID Guid;
CHAR16 *VariableName;
UINTN NameSize;
+ UINTN NameBufferSize;
CHAR16 *RetVal;
UINTN RetSize;
- Status = gRT->QueryVariableInfo(EFI_VARIABLE_NON_VOLATILE|EFI_VARIABLE_BOOTSERVICE_ACCESS, &MaxStorSize, &RemStorSize, &MaxVarSize);
- ASSERT_EFI_ERROR(Status);
-
- VariableName = AllocateZeroPool((UINTN)MaxVarSize);
+ NameBufferSize = INIT_NAME_BUFFER_SIZE;
+ VariableName = AllocateZeroPool(NameBufferSize);
RetSize = 0;
RetVal = NULL;
@@ -3126,22 +3125,38 @@ InternalEfiShellGetListAlias(
VariableName[0] = CHAR_NULL;
while (TRUE) {
- NameSize = (UINTN)MaxVarSize;
+ NameSize = NameBufferSize;
Status = gRT->GetNextVariableName(&NameSize, VariableName, &Guid);
if (Status == EFI_NOT_FOUND){
break;
- }
- ASSERT_EFI_ERROR(Status);
- if (EFI_ERROR(Status)) {
+ } else if (Status == EFI_BUFFER_TOO_SMALL) {
+ NameBufferSize = NameSize > NameBufferSize * 2 ? NameSize : NameBufferSize * 2;
+ SHELL_FREE_NON_NULL(VariableName);
+ VariableName = AllocateZeroPool(NameBufferSize);
+ if (VariableName == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ SHELL_FREE_NON_NULL(RetVal);
+ RetVal = NULL;
+ break;
+ }
+
+ NameSize = NameBufferSize;
+ Status = gRT->GetNextVariableName(&NameSize, VariableName, &Guid);
+ }
+
+ if (EFI_ERROR (Status)) {
+ SHELL_FREE_NON_NULL(RetVal);
+ RetVal = NULL;
break;
}
+
if (CompareGuid(&Guid, &gShellAliasGuid)){
ASSERT((RetVal == NULL && RetSize == 0) || (RetVal != NULL));
RetVal = StrnCatGrow(&RetVal, &RetSize, VariableName, 0);
RetVal = StrnCatGrow(&RetVal, &RetSize, L";", 0);
} // compare guid
} // while
- FreePool(VariableName);
+ SHELL_FREE_NON_NULL(VariableName);
return (RetVal);
}
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