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audk/ShellPkg/Library/UefiShellDebug1CommandsLib/SetVar.c

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/** @file
Main file for SetVar shell Debug1 function.
Copyright (c) 2010 - 2014, 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
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 "UefiShellDebug1CommandsLib.h"
STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
{L"-guid", TypeValue},
{L"-bs", TypeFlag},
{L"-rt", TypeFlag},
{L"-nv", TypeFlag},
{NULL, TypeMax}
};
/**
Function for 'setvar' command.
@param[in] ImageHandle Handle to the Image (NULL if Internal).
@param[in] SystemTable Pointer to the System Table (NULL if Internal).
**/
SHELL_STATUS
EFIAPI
ShellCommandRunSetVar (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
LIST_ENTRY *Package;
CHAR16 *ProblemParam;
SHELL_STATUS ShellStatus;
CONST CHAR16 *VariableName;
CONST CHAR16 *Data;
EFI_GUID Guid;
CONST CHAR16 *StringGuid;
UINT32 Attributes;
VOID *Buffer;
UINTN Size;
UINTN LoopVar;
EFI_DEVICE_PATH_PROTOCOL *DevPath;
ShellStatus = SHELL_SUCCESS;
Status = EFI_SUCCESS;
Buffer = NULL;
Size = 0;
Attributes = 0;
DevPath = NULL;
//
// initialize the shell lib (we must be in non-auto-init...)
//
Status = ShellInitialize();
ASSERT_EFI_ERROR(Status);
Status = CommandInit();
ASSERT_EFI_ERROR(Status);
//
// parse the command line
//
Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
if (EFI_ERROR(Status)) {
if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellDebug1HiiHandle, ProblemParam);
FreePool(ProblemParam);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
ASSERT(FALSE);
}
} else {
if (ShellCommandLineGetCount(Package) < 2) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellDebug1HiiHandle);
ShellStatus = SHELL_INVALID_PARAMETER;
} else if (ShellCommandLineGetCount(Package) > 3) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellDebug1HiiHandle);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
VariableName = ShellCommandLineGetRawValue(Package, 1);
Data = ShellCommandLineGetRawValue(Package, 2);
if (!ShellCommandLineGetFlag(Package, L"-guid")){
CopyGuid(&Guid, &gEfiGlobalVariableGuid);
} else {
StringGuid = ShellCommandLineGetValue(Package, L"-guid");
Status = ConvertStringToGuid(StringGuid, &Guid);
if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellDebug1HiiHandle, StringGuid);
ShellStatus = SHELL_INVALID_PARAMETER;
}
}
if (Data == NULL || Data[0] != L'=') {
//
// Display what's there
//
Status = gRT->GetVariable((CHAR16*)VariableName, &Guid, &Attributes, &Size, Buffer);
if (Status == EFI_BUFFER_TOO_SMALL) {
Buffer = AllocateZeroPool(Size);
Status = gRT->GetVariable((CHAR16*)VariableName, &Guid, &Attributes, &Size, Buffer);
}
if (!EFI_ERROR(Status)&& Buffer != NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_PRINT), gShellDebug1HiiHandle, &Guid, VariableName, Size);
for (LoopVar = 0 ; LoopVar < Size ; LoopVar++) {
ShellPrintEx(-1, -1, L"%02x ", ((UINT8*)Buffer)[LoopVar]);
}
ShellPrintEx(-1, -1, L"\r\n");
} else {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_GET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
ShellStatus = SHELL_ACCESS_DENIED;
}
} else if (StrCmp(Data, L"=") == 0) {
//
// Delete what's there!
//
Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, 0, NULL);
if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
ShellStatus = SHELL_ACCESS_DENIED;
} else {
ASSERT(ShellStatus == SHELL_SUCCESS);
}
} else {
//
// Change what's there or create a new one.
//
ASSERT(Data[0] == L'=');
Data++;
//
// Determine if the variable exists and get the attributes
//
Status = gRT->GetVariable((CHAR16*)VariableName, &Guid, &Attributes, &Size, Buffer);
if (Status == EFI_BUFFER_TOO_SMALL) {
Buffer = AllocateZeroPool(Size);
Status = gRT->GetVariable((CHAR16*)VariableName, &Guid, &Attributes, &Size, Buffer);
}
if (EFI_ERROR(Status) || Buffer == NULL) {
//
// Creating a new variable. determine attributes from command line.
//
Attributes = 0;
if (ShellCommandLineGetFlag(Package, L"-bs")) {
Attributes |= EFI_VARIABLE_BOOTSERVICE_ACCESS;
}
if (ShellCommandLineGetFlag(Package, L"-rt")) {
Attributes |= EFI_VARIABLE_RUNTIME_ACCESS |
EFI_VARIABLE_BOOTSERVICE_ACCESS;
}
if (ShellCommandLineGetFlag(Package, L"-nv")) {
Attributes |= EFI_VARIABLE_NON_VOLATILE;
}
}
SHELL_FREE_NON_NULL(Buffer);
//
// What type is the new data.
//
if (ShellIsHexOrDecimalNumber(Data, TRUE, FALSE)) {
if (StrLen(Data) % 2 != 0) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM_VAL), gShellDebug1HiiHandle, Data);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
//
// arbitrary buffer
//
Buffer = AllocateZeroPool((StrLen(Data) / 2));
if (Buffer == NULL) {
Status = EFI_OUT_OF_RESOURCES;
} else {
for (LoopVar = 0 ; LoopVar < (StrLen(Data) / 2) ; LoopVar++) {
((UINT8*)Buffer)[LoopVar] = (UINT8)(HexCharToUintn(Data[LoopVar*2]) * 16);
((UINT8*)Buffer)[LoopVar] = (UINT8)(((UINT8*)Buffer)[LoopVar] + HexCharToUintn(Data[LoopVar*2+1]));
}
Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, StrLen(Data) / 2, Buffer);
}
if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
ShellStatus = SHELL_ACCESS_DENIED;
} else {
ASSERT(ShellStatus == SHELL_SUCCESS);
}
}
} else if (StrnCmp(Data, L"\"", 1) == 0) {
//
// ascii text
//
Data++;
Buffer = AllocateZeroPool(StrSize(Data) / 2);
if (Buffer == NULL) {
Status = EFI_OUT_OF_RESOURCES;
} else {
AsciiSPrint(Buffer, StrSize(Data) / 2, "%s", Data);
((CHAR8*)Buffer)[AsciiStrLen(Buffer)-1] = CHAR_NULL;
Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, AsciiStrSize(Buffer)-sizeof(CHAR8), Buffer);
}
if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
ShellStatus = SHELL_ACCESS_DENIED;
} else {
ASSERT(ShellStatus == SHELL_SUCCESS);
}
} else if (StrnCmp(Data, L"L\"", 2) == 0) {
//
// ucs2 text
//
Data++;
Data++;
Buffer = AllocateZeroPool(StrSize(Data));
if (Buffer == NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_OUT_MEM), gShellDebug1HiiHandle);
ShellStatus = SHELL_OUT_OF_RESOURCES;
} else {
UnicodeSPrint(Buffer, StrSize(Data), L"%s", Data);
((CHAR16*)Buffer)[StrLen(Buffer)-1] = CHAR_NULL;
Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, StrSize(Buffer)-sizeof(CHAR16), Buffer);
if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
ShellStatus = SHELL_ACCESS_DENIED;
} else {
ASSERT(ShellStatus == SHELL_SUCCESS);
}
}
} else if (StrnCmp(Data, L"--", 2) == 0) {
//
// device path in text format
//
Data++;
Data++;
DevPath = ConvertTextToDevicePath(Data);
if (DevPath == NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_DPFT), gShellDebug1HiiHandle, Status);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, GetDevicePathSize(DevPath), DevPath);
if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
ShellStatus = SHELL_ACCESS_DENIED;
} else {
ASSERT(ShellStatus == SHELL_SUCCESS);
}
}
} else {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellDebug1HiiHandle, Data);
ShellStatus = SHELL_INVALID_PARAMETER;
}
}
}
ShellCommandLineFreeVarList (Package);
}
if (Buffer != NULL) {
FreePool(Buffer);
}
if (DevPath != NULL) {
FreePool(DevPath);
}
return (ShellStatus);
}
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