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         }
 144         if (ShellCommandLineGetFlag(Package, L"-nv")) {
 145           Attributes |= EFI_VARIABLE_NON_VOLATILE;
 146         }
 147         if (ShellIsHexOrDecimalNumber(Data, TRUE, FALSE)) {
 148           if (StrLen(Data) % 2 != 0) {
 149             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM_VAL), gShellDebug1HiiHandle, Data);
 150             ShellStatus = SHELL_INVALID_PARAMETER;
 151           } else {
 152             //
 153             // arbitrary buffer
 154             //
 155             Buffer = AllocateZeroPool((StrLen(Data) / 2));
 156             if (Buffer == NULL) {
 157               Status = EFI_OUT_OF_RESOURCES;
 158             } else {
 159               for (LoopVar = 0 ; LoopVar < (StrLen(Data) / 2) ; LoopVar++) {
 160                 ((UINT8*)Buffer)[LoopVar] = (UINT8)(HexCharToUintn(Data[LoopVar*2]) * 16);
 161                 ((UINT8*)Buffer)[LoopVar] = (UINT8)(((UINT8*)Buffer)[LoopVar] + HexCharToUintn(Data[LoopVar*2+1]));
 162               }
 163               Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, StrLen(Data) / 2, Buffer);
 164             }
 165             if (EFI_ERROR(Status)) {
 166               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
 167               ShellStatus = SHELL_ACCESS_DENIED;
 168             } else {
 169               ASSERT(ShellStatus == SHELL_SUCCESS);
 170             }
 171           }
 172         } else if (StrnCmp(Data, L"\"", 1) == 0) {
 173           Size = 0;
 174           Attributes2 = 0;
 175           Status = gRT->GetVariable((CHAR16*)VariableName, &Guid, &Attributes2, &Size, Buffer);
 176           if (Status == EFI_BUFFER_TOO_SMALL) {
 177             Buffer = AllocateZeroPool(Size);
 178             Status = gRT->GetVariable((CHAR16*)VariableName, &Guid, &Attributes2, &Size, Buffer);
 179             FreePool(Buffer);
 180             Attributes = Attributes2;
 181           }
 182           //
 183           // ascii text
 184           //
 185           Data++;
 186           Buffer = AllocateZeroPool(StrSize(Data) / 2);
 187           if (Buffer == NULL) {
 188             Status = EFI_OUT_OF_RESOURCES;
 189           } else {
 190             AsciiSPrint(Buffer, StrSize(Data) / 2, "%s", Data);
 191             ((CHAR8*)Buffer)[AsciiStrLen(Buffer)-1] = CHAR_NULL;
 192             Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, AsciiStrSize(Buffer)-sizeof(CHAR8), Buffer);
 193           }
 194           if (EFI_ERROR(Status)) {
 195             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
 196             ShellStatus = SHELL_ACCESS_DENIED;
 197           } else {
 198             ASSERT(ShellStatus == SHELL_SUCCESS);
 199           }
 200         } else if (StrnCmp(Data, L"L\"", 2) == 0) {
 201           //
 202           // ucs2 text
 203           //
 204           Data++;
 205           Data++;
 206           Buffer = AllocateZeroPool(StrSize(Data));
 207           if (Buffer == NULL) {
 208             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_OUT_MEM), gShellDebug1HiiHandle);
 209             ShellStatus = SHELL_OUT_OF_RESOURCES;
 210           } else {
 211             UnicodeSPrint(Buffer, StrSize(Data), L"%s", Data);
 212             ((CHAR16*)Buffer)[StrLen(Buffer)-1] = CHAR_NULL;
 213
 214             Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, StrSize(Buffer)-sizeof(CHAR16), Buffer);
 215             if (EFI_ERROR(Status)) {
 216               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
 217               ShellStatus = SHELL_ACCESS_DENIED;
 218             } else {
 219               ASSERT(ShellStatus == SHELL_SUCCESS);
 220             }
 221           }
 222         } else if (StrnCmp(Data, L"--", 2) == 0) {
 223           //
 224           // device path in text format
 225           //
 226           Data++;
 227           Data++;
 228           DevPath = ConvertTextToDevicePath(Data);
 229           if (DevPath == NULL) {
 230             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_DPFT), gShellDebug1HiiHandle, Status);
 231             ShellStatus = SHELL_INVALID_PARAMETER;
 232           } else {
 233             Status = gRT->SetVariable((CHAR16*)VariableName, &Guid, Attributes, GetDevicePathSize(DevPath), DevPath);
 234             if (EFI_ERROR(Status)) {
 235               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SETVAR_ERROR_SET), gShellDebug1HiiHandle, &Guid, VariableName, Status);
 236               ShellStatus = SHELL_ACCESS_DENIED;
 237             } else {
 238               ASSERT(ShellStatus == SHELL_SUCCESS);
 239             }
 240           }
 241         } else {
 242           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellDebug1HiiHandle, Data);
 243           ShellStatus = SHELL_INVALID_PARAMETER;
 244         }
 245       }
 246     }
 247     ShellCommandLineFreeVarList (Package);
 248   }
 249
 250   if (Buffer != NULL) {
 251     FreePool(Buffer);
 252   }
 253
 254   if (DevPath != NULL) {
 255     FreePool(DevPath);
 256   }
 257
 258   return (ShellStatus);
 259 }