ShellPkg/Library/UefiShellDebug1CommandsLib/SetVar.c

   1 /** @file
   2   Main file for SetVar shell Debug1 function.
   3
   4   Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "UefiShellDebug1CommandsLib.h"
  16
  17 STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
  18   {L"-guid", TypeValue},
  19   {L"-bs", TypeFlag},
  20   {L"-rt", TypeFlag},
  21   {L"-nv", TypeFlag},
  22   {NULL, TypeMax}
  23   };
  24
  25 /**
  26   Function for 'setvar' command.
  27
  28   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  29   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  30 **/
  31 SHELL_STATUS
  32 EFIAPI
  33 ShellCommandRunSetVar (
  34   IN EFI_HANDLE        ImageHandle,
  35   IN EFI_SYSTEM_TABLE  *SystemTable
  36   )
  37 {
  38   EFI_STATUS          Status;
  39   LIST_ENTRY          *Package;
  40   CHAR16              *ProblemParam;
  41   SHELL_STATUS        ShellStatus;
  42   CONST CHAR16        *VariableName;
  43   CONST CHAR16        *Data;
  44   EFI_GUID            Guid;
  45   CONST CHAR16        *StringGuid;
  46   UINT32              Attributes;
  47   UINT32              Attributes2;
  48   VOID                *Buffer;
  49   UINTN               Size;
  50   UINTN               LoopVar;
  51   EFI_DEVICE_PATH_PROTOCOL           *DevPath;
  52
  53   ShellStatus         = SHELL_SUCCESS;
  54   Status              = EFI_SUCCESS;
  55   Buffer              = NULL;
  56   Size                = 0;
  57   Attributes          = 0;
  58   DevPath             = NULL;
  59
  60   //
  61   // initialize the shell lib (we must be in non-auto-init...)
  62   //
  63   Status = ShellInitialize();
  64   ASSERT_EFI_ERROR(Status);
  65
  66   Status = CommandInit();
  67   ASSERT_EFI_ERROR(Status);
  68
  69   //
  70   // parse the command line
  71   //
  72   Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
  73   if (EFI_ERROR(Status)) {
  74     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  75       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellDebug1HiiHandle, ProblemParam);
  76       FreePool(ProblemParam);
  77       ShellStatus = SHELL_INVALID_PARAMETER;
  78     } else {
  79       ASSERT(FALSE);
  80     }
  81   } else {
  82     if (ShellCommandLineGetCount(Package) < 2) {
  83       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellDebug1HiiHandle);
  84       ShellStatus = SHELL_INVALID_PARAMETER;
  85     } else if (ShellCommandLineGetCount(Package) > 3) {
  86       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellDebug1HiiHandle);
  87       ShellStatus = SHELL_INVALID_PARAMETER;
  88     } else {
  89       VariableName  = ShellCommandLineGetRawValue(Package, 1);
  90       Data          = ShellCommandLineGetRawValue(Package, 2);
  91       if (!ShellCommandLineGetFlag(Package, L"-guid")){
  92         CopyGuid(&Guid, &gEfiGlobalVariableGuid);
  93       } else {
  94         StringGuid = ShellCommandLineGetValue(Package, L"-guid");
  95         Status = ConvertStringToGuid(StringGuid, &Guid);
  96         if (EFI_ERROR(Status)) {
  97           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellDebug1HiiHandle, StringGuid);
  98           ShellStatus = SHELL_INVALID_PARAMETER;
  99         }
 100       }
 101       if (Data == NULL) {
 102         //
 103         // Display what's there
 104         //
 105         Status = gRT->GetVariable((CHAR16*)VariableName, &Guid, &Attributes, &Size, Buffer);
 106         if (Status == EFI_BUFFER_TOO_SMALL) {
 107           Buffer = AllocateZeroPool(Size);
 108           Status = gRT->GetVariable((CHAR16*)VariableName, &Guid, &Attributes, &Size, Buffer);
 109         }
 110         if (!EFI_ERROR(Status)&& Buffer != NULL) {
 111           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_PRINT), gShellDebug1HiiHandle, &Guid, VariableName, Size);
 112           for (LoopVar = 0 ; LoopVar < Size ; LoopVar++) {
 113             ShellPrintEx(-1, -1, L"%02x ", ((UINT8*)Buffer)[LoopVar]);
 114           }
 115           ShellPrintEx(-1, -1, L"\r\n");
 116         } else {
 117           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_GET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
 118           ShellStatus = SHELL_ACCESS_DENIED;
 119         }
 120       } else if (StrCmp(Data, L"=") == 0) {
 121         //
 122         // Delete what's there!
 123         //
 124         Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, 0, NULL);
 125         if (EFI_ERROR(Status)) {
 126           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
 127           ShellStatus = SHELL_ACCESS_DENIED;
 128         } else {
 129           ASSERT(ShellStatus == SHELL_SUCCESS);
 130         }
 131       } else {
 132         if (Data[0] == L'=') {
 133           Data++;
 134         }
 135         //
 136         // Change what's there
 137         //
 138         if (ShellCommandLineGetFlag(Package, L"-bs")) {
 139           Attributes |= EFI_VARIABLE_BOOTSERVICE_ACCESS;
 140         }
 141         if (ShellCommandLineGetFlag(Package, L"-rt")) {
 142           Attributes |= EFI_VARIABLE_RUNTIME_ACCESS |
 143                         EFI_VARIABLE_BOOTSERVICE_ACCESS;
 144         }
 145         if (ShellCommandLineGetFlag(Package, L"-nv")) {
 146           Attributes |= EFI_VARIABLE_NON_VOLATILE;
 147         }
 148         if (ShellIsHexOrDecimalNumber(Data, TRUE, FALSE)) {
 149           if (StrLen(Data) % 2 != 0) {
 150             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM_VAL), gShellDebug1HiiHandle, Data);
 151             ShellStatus = SHELL_INVALID_PARAMETER;
 152           } else {
 153             //
 154             // arbitrary buffer
 155             //
 156             Buffer = AllocateZeroPool((StrLen(Data) / 2));
 157             if (Buffer == NULL) {
 158               Status = EFI_OUT_OF_RESOURCES;
 159             } else {
 160               for (LoopVar = 0 ; LoopVar < (StrLen(Data) / 2) ; LoopVar++) {
 161                 ((UINT8*)Buffer)[LoopVar] = (UINT8)(HexCharToUintn(Data[LoopVar*2]) * 16);
 162                 ((UINT8*)Buffer)[LoopVar] = (UINT8)(((UINT8*)Buffer)[LoopVar] + HexCharToUintn(Data[LoopVar*2+1]));
 163               }
 164               Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, StrLen(Data) / 2, Buffer);
 165             }
 166             if (EFI_ERROR(Status)) {
 167               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
 168               ShellStatus = SHELL_ACCESS_DENIED;
 169             } else {
 170               ASSERT(ShellStatus == SHELL_SUCCESS);
 171             }
 172           }
 173         } else if (StrnCmp(Data, L"\"", 1) == 0) {
 174           Size = 0;
 175           Attributes2 = 0;
 176           Status = gRT->GetVariable((CHAR16*)VariableName, &Guid, &Attributes2, &Size, Buffer);
 177           if (Status == EFI_BUFFER_TOO_SMALL) {
 178             Buffer = AllocateZeroPool(Size);
 179             Status = gRT->GetVariable((CHAR16*)VariableName, &Guid, &Attributes2, &Size, Buffer);
 180             if (Buffer != NULL) {
 181               FreePool(Buffer);
 182             }
 183             Attributes = Attributes2;
 184           }
 185           //
 186           // ascii text
 187           //
 188           Data++;
 189           Buffer = AllocateZeroPool(StrSize(Data) / 2);
 190           if (Buffer == NULL) {
 191             Status = EFI_OUT_OF_RESOURCES;
 192           } else {
 193             AsciiSPrint(Buffer, StrSize(Data) / 2, "%s", Data);
 194             ((CHAR8*)Buffer)[AsciiStrLen(Buffer)-1] = CHAR_NULL;
 195             Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, AsciiStrSize(Buffer)-sizeof(CHAR8), Buffer);
 196           }
 197           if (EFI_ERROR(Status)) {
 198             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
 199             ShellStatus = SHELL_ACCESS_DENIED;
 200           } else {
 201             ASSERT(ShellStatus == SHELL_SUCCESS);
 202           }
 203         } else if (StrnCmp(Data, L"L\"", 2) == 0) {
 204           //
 205           // ucs2 text
 206           //
 207           Data++;
 208           Data++;
 209           Buffer = AllocateZeroPool(StrSize(Data));
 210           if (Buffer == NULL) {
 211             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_OUT_MEM), gShellDebug1HiiHandle);
 212             ShellStatus = SHELL_OUT_OF_RESOURCES;
 213           } else {
 214             UnicodeSPrint(Buffer, StrSize(Data), L"%s", Data);
 215             ((CHAR16*)Buffer)[StrLen(Buffer)-1] = CHAR_NULL;
 216
 217             Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, StrSize(Buffer)-sizeof(CHAR16), Buffer);
 218             if (EFI_ERROR(Status)) {
 219               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
 220               ShellStatus = SHELL_ACCESS_DENIED;
 221             } else {
 222               ASSERT(ShellStatus == SHELL_SUCCESS);
 223             }
 224           }
 225         } else if (StrnCmp(Data, L"--", 2) == 0) {
 226           //
 227           // device path in text format
 228           //
 229           Data++;
 230           Data++;
 231           DevPath = ConvertTextToDevicePath(Data);
 232           if (DevPath == NULL) {
 233             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_DPFT), gShellDebug1HiiHandle, Status);
 234             ShellStatus = SHELL_INVALID_PARAMETER;
 235           } else {
 236             Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, GetDevicePathSize(DevPath), DevPath);
 237             if (EFI_ERROR(Status)) {
 238               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
 239               ShellStatus = SHELL_ACCESS_DENIED;
 240             } else {
 241               ASSERT(ShellStatus == SHELL_SUCCESS);
 242             }
 243           }
 244         } else {
 245           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellDebug1HiiHandle, Data);
 246           ShellStatus = SHELL_INVALID_PARAMETER;
 247         }
 248       }
 249     }
 250     ShellCommandLineFreeVarList (Package);
 251   }
 252
 253   if (Buffer != NULL) {
 254     FreePool(Buffer);
 255   }
 256
 257   if (DevPath != NULL) {
 258     FreePool(DevPath);
 259   }
 260
 261   return (ShellStatus);
 262 }