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/** @file
*
* Copyright (c) 2011, ARM Limited. All rights reserved.
*
* 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
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
**/
#include "Ebl.h"
#include <Guid/GlobalVariable.h>
EFI_STATUS
EblGetCmd (
IN UINTN Argc,
IN CHAR8 **Argv
)
{
EFI_STATUS Status = EFI_INVALID_PARAMETER;
UINTN Size;
VOID* Value;
CHAR8* AsciiVariableName = NULL;
CHAR16* VariableName;
UINT32 Index;
if (Argc == 1) {
AsciiPrint("Variable name is missing.\n");
return Status;
}
for (Index = 1; Index < Argc; Index++) {
if (Argv[Index][0] == '-') {
AsciiPrint("Warning: '%a' not recognized.\n",Argv[Index]);
} else {
AsciiVariableName = Argv[Index];
}
}
if (AsciiVariableName == NULL) {
AsciiPrint("Variable name is missing.\n");
return Status;
} else {
VariableName = AllocatePool((AsciiStrLen (AsciiVariableName) + 1) * sizeof (CHAR16));
AsciiStrToUnicodeStr (AsciiVariableName,VariableName);
}
// Try to get the variable size.
Value = NULL;
Size = 0;
Status = gRT->GetVariable (VariableName, &gEfiGlobalVariableGuid, NULL, &Size, Value);
if (Status == EFI_NOT_FOUND) {
AsciiPrint("Variable name '%s' not found.\n",VariableName);
} else if (Status == EFI_BUFFER_TOO_SMALL) {
// Get the environment variable value
Value = AllocatePool (Size);
if (Value == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = gRT->GetVariable ((CHAR16 *)VariableName, &gEfiGlobalVariableGuid, NULL, &Size, Value);
if (EFI_ERROR (Status)) {
AsciiPrint("Error: '%r'\n",Status);
} else {
AsciiPrint("%a=%a\n",AsciiVariableName,Value);
}
FreePool(Value);
} else {
AsciiPrint("Error: '%r'\n",Status);
}
FreePool(VariableName);
return Status;
}
EFI_STATUS
EblSetCmd (
IN UINTN Argc,
IN CHAR8 **Argv
)
{
EFI_STATUS Status = EFI_INVALID_PARAMETER;
CHAR8* AsciiVariableSetting = NULL;
CHAR8* AsciiVariableName;
CHAR8* AsciiValue;
UINT32 AsciiValueLength;
CHAR16* VariableName;
UINT32 Index;
UINT32 EscapedQuotes = 0;
BOOLEAN Volatile = FALSE;
if (Argc == 1) {
AsciiPrint("Variable name is missing.\n");
return Status;
}
for (Index = 1; Index < Argc; Index++) {
if (AsciiStrCmp(Argv[Index],"-v") == 0) {
Volatile = 0;
} else if (Argv[Index][0] == '-') {
AsciiPrint("Warning: '%a' not recognized.\n",Argv[Index]);
} else {
AsciiVariableSetting = Argv[Index];
}
}
if (AsciiVariableSetting == NULL) {
AsciiPrint("Variable name is missing.\n");
return Status;
}
// Check if it is a valid variable setting
AsciiValue = AsciiStrStr (AsciiVariableSetting,"=");
if (AsciiValue == NULL) {
//
// There is no value. It means this variable will be deleted
//
// Convert VariableName into Unicode
VariableName = AllocatePool((AsciiStrLen (AsciiVariableSetting) + 1) * sizeof (CHAR16));
AsciiStrToUnicodeStr (AsciiVariableSetting,VariableName);
Status = gRT->SetVariable (
VariableName,
&gEfiGlobalVariableGuid,
( !Volatile ? EFI_VARIABLE_NON_VOLATILE : 0) |
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
0,
NULL
);
if (!EFI_ERROR(Status)) {
AsciiPrint("Variable '%s' deleted\n",VariableName);
} else {
AsciiPrint("Variable setting is incorrect. It should be VariableName=Value\n");
}
return Status;
}
AsciiValue[0] = '\0';
AsciiVariableName = AsciiVariableSetting;
AsciiValue++;
// Clean AsciiValue from quote
if (AsciiValue[0] == '"') {
AsciiValue++;
}
AsciiValueLength = AsciiStrLen (AsciiValue);
if ((AsciiValue[AsciiValueLength-2] != '\\') && (AsciiValue[AsciiValueLength-1] == '"')) {
AsciiValue[AsciiValueLength-1] = '\0';
}
// Clean AsciiValue from escaped quotes
for (Index = 0; Index < AsciiValueLength; Index++) {
if ((Index > 0) && (AsciiValue[Index-1] == '\\') && (AsciiValue[Index] == '"')) {
EscapedQuotes++;
}
AsciiValue[Index-EscapedQuotes] = AsciiValue[Index];
}
// Fill the end of the value with '\0'
for (Index = 0; Index < EscapedQuotes; Index++) {
AsciiValue[AsciiValueLength-1-Index] = '\0';
}
// Convert VariableName into Unicode
VariableName = AllocatePool((AsciiStrLen (AsciiVariableName) + 1) * sizeof (CHAR16));
AsciiStrToUnicodeStr (AsciiVariableName,VariableName);
Status = gRT->SetVariable (
VariableName,
&gEfiGlobalVariableGuid,
( !Volatile ? EFI_VARIABLE_NON_VOLATILE : 0) |
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
AsciiStrLen (AsciiValue)+1,
AsciiValue
);
if (!EFI_ERROR(Status)) {
AsciiPrint("'%a'='%a'\n",AsciiVariableName,AsciiValue);
}
return Status;
}
GLOBAL_REMOVE_IF_UNREFERENCED const EBL_COMMAND_TABLE mCmdVariableTemplate[] =
{
{
"get",
" ; get UEFI variable\n\r [v]; verbose",
NULL,
EblGetCmd
},
{
"set",
" ; set UEFI variable\n\r [v]; create volatile variable",
NULL,
EblSetCmd
}
};
/**
Initialize the commands in this in this file
**/
VOID
EblInitializeVariableCmds (
VOID
)
{
EblAddCommands (mCmdVariableTemplate, sizeof (mCmdVariableTemplate)/sizeof (EBL_COMMAND_TABLE));
}
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