ShellPkg/Library/UefiShellLevel1CommandsLib/For.c

   1 /** @file
   2   Main file for endfor and for shell level 1 functions.
   3
   4   Copyright (c) 2009 - 2014, 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 "UefiShellLevel1CommandsLib.h"
  16 #include <Library/PrintLib.h>
  17
  18 /**
  19   Determine if a valid string is a valid number for the 'for' command.
  20
  21   @param[in] Number The pointer to the string representation of the number to test.
  22
  23   @retval TRUE    The number is valid.
  24   @retval FALSE   The number is not valid.
  25 **/
  26 BOOLEAN
  27 EFIAPI
  28 ShellIsValidForNumber (
  29   IN CONST CHAR16 *Number
  30   )
  31 {
  32   if (Number == NULL || *Number == CHAR_NULL) {
  33     return (FALSE);
  34   }
  35
  36   if (*Number == L'-') {
  37     Number++;
  38   }
  39
  40   if (StrLen(Number) == 0) {
  41     return (FALSE);
  42   }
  43
  44   if (StrLen(Number) >= 7) {
  45     if ((StrStr(Number, L" ") == NULL) || (((StrStr(Number, L" ") != NULL) && (StrStr(Number, L" ") - Number) >= 7))) {
  46       return (FALSE);
  47     }
  48   }
  49
  50   if (!ShellIsDecimalDigitCharacter(*Number)) {
  51     return (FALSE);
  52   }
  53
  54   return (TRUE);
  55 }
  56
  57 /**
  58   Function for 'endfor' command.
  59
  60   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  61   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  62 **/
  63 SHELL_STATUS
  64 EFIAPI
  65 ShellCommandRunEndFor (
  66   IN EFI_HANDLE        ImageHandle,
  67   IN EFI_SYSTEM_TABLE  *SystemTable
  68   )
  69 {
  70   EFI_STATUS          Status;
  71   BOOLEAN             Found;
  72   SCRIPT_FILE         *CurrentScriptFile;
  73
  74   Status = CommandInit();
  75   ASSERT_EFI_ERROR(Status);
  76
  77   if (!gEfiShellProtocol->BatchIsActive()) {
  78     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"EndFor");
  79     return (SHELL_UNSUPPORTED);
  80   }
  81
  82   if (gEfiShellParametersProtocol->Argc > 1) {
  83     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel1HiiHandle);
  84     return (SHELL_INVALID_PARAMETER);
  85   }
  86
  87   Found = MoveToTag(GetPreviousNode, L"for", L"endfor", NULL, ShellCommandGetCurrentScriptFile(), FALSE, FALSE, FALSE);
  88
  89   if (!Found) {
  90     CurrentScriptFile = ShellCommandGetCurrentScriptFile();
  91     ShellPrintHiiEx(
  92       -1,
  93       -1,
  94       NULL,
  95       STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
  96       gShellLevel1HiiHandle,
  97       L"For",
  98       L"EndFor",
  99       CurrentScriptFile!=NULL
 100         && CurrentScriptFile->CurrentCommand!=NULL
 101           ? CurrentScriptFile->CurrentCommand->Line:0);
 102     return (SHELL_NOT_FOUND);
 103   }
 104   return (SHELL_SUCCESS);
 105 }
 106
 107 typedef struct {
 108   UINT32          Signature;
 109   INTN            Current;
 110   INTN            End;
 111   INTN            Step;
 112   CHAR16          *ReplacementName;
 113   CHAR16          *CurrentValue;
 114   BOOLEAN         RemoveSubstAlias;
 115   CHAR16          Set[1];
 116   } SHELL_FOR_INFO;
 117 #define SIZE_OF_SHELL_FOR_INFO OFFSET_OF (SHELL_FOR_INFO, Set)
 118 #define SHELL_FOR_INFO_SIGNATURE SIGNATURE_32 ('S', 'F', 'I', 's')
 119
 120 /**
 121   Update the value of a given alias on the list.  If the alias is not there then add it.
 122
 123   @param[in] Alias               The alias to test for.
 124   @param[in] CommandString       The updated command string.
 125   @param[in, out] List           The list to search.
 126
 127   @retval EFI_SUCCESS           The operation was completed successfully.
 128   @retval EFI_OUT_OF_RESOURCES  There was not enough free memory.
 129 **/
 130 EFI_STATUS
 131 EFIAPI
 132 InternalUpdateAliasOnList(
 133   IN CONST CHAR16       *Alias,
 134   IN CONST CHAR16       *CommandString,
 135   IN OUT LIST_ENTRY     *List
 136   )
 137 {
 138   ALIAS_LIST *Node;
 139   BOOLEAN    Found;
 140
 141   //
 142   // assert for NULL parameter
 143   //
 144   ASSERT(Alias != NULL);
 145
 146   //
 147   // check for the Alias
 148   //
 149   for ( Node = (ALIAS_LIST *)GetFirstNode(List), Found = FALSE
 150       ; !IsNull(List, &Node->Link)
 151       ; Node = (ALIAS_LIST *)GetNextNode(List, &Node->Link)
 152      ){
 153     ASSERT(Node->CommandString != NULL);
 154     ASSERT(Node->Alias != NULL);
 155     if (StrCmp(Node->Alias, Alias)==0) {
 156       FreePool(Node->CommandString);
 157       Node->CommandString = NULL;
 158       Node->CommandString = StrnCatGrow(&Node->CommandString, NULL, CommandString, 0);
 159       Found = TRUE;
 160       break;
 161     }
 162   }
 163   if (!Found) {
 164     Node = AllocateZeroPool(sizeof(ALIAS_LIST));
 165     if (Node == NULL) {
 166       return (EFI_OUT_OF_RESOURCES);
 167     }
 168     ASSERT(Node->Alias == NULL);
 169     Node->Alias         = StrnCatGrow(&Node->Alias, NULL, Alias, 0);
 170     ASSERT(Node->CommandString == NULL);
 171     Node->CommandString = StrnCatGrow(&Node->CommandString, NULL, CommandString, 0);
 172     InsertTailList(List, &Node->Link);
 173   }
 174   return (EFI_SUCCESS);
 175 }
 176
 177 /**
 178   Find out if an alias is on the given list.
 179
 180   @param[in] Alias              The alias to test for.
 181   @param[in] List               The list to search.
 182
 183   @retval TRUE                  The alias is on the list.
 184   @retval FALSE                 The alias is not on the list.
 185 **/
 186 BOOLEAN
 187 EFIAPI
 188 InternalIsAliasOnList(
 189   IN CONST CHAR16       *Alias,
 190   IN CONST LIST_ENTRY   *List
 191   )
 192 {
 193   ALIAS_LIST *Node;
 194
 195   //
 196   // assert for NULL parameter
 197   //
 198   ASSERT(Alias != NULL);
 199
 200   //
 201   // check for the Alias
 202   //
 203   for ( Node = (ALIAS_LIST *)GetFirstNode(List)
 204       ; !IsNull(List, &Node->Link)
 205       ; Node = (ALIAS_LIST *)GetNextNode(List, &Node->Link)
 206      ){
 207     ASSERT(Node->CommandString != NULL);
 208     ASSERT(Node->Alias != NULL);
 209     if (StrCmp(Node->Alias, Alias)==0) {
 210       return (TRUE);
 211     }
 212   }
 213   return (FALSE);
 214 }
 215
 216 /**
 217   Remove an alias from the given list.
 218
 219   @param[in] Alias               The alias to remove.
 220   @param[in, out] List           The list to search.
 221 **/
 222 BOOLEAN
 223 EFIAPI
 224 InternalRemoveAliasFromList(
 225   IN CONST CHAR16       *Alias,
 226   IN OUT LIST_ENTRY     *List
 227   )
 228 {
 229   ALIAS_LIST *Node;
 230
 231   //
 232   // assert for NULL parameter
 233   //
 234   ASSERT(Alias != NULL);
 235
 236   //
 237   // check for the Alias
 238   //
 239   for ( Node = (ALIAS_LIST *)GetFirstNode(List)
 240       ; !IsNull(List, &Node->Link)
 241       ; Node = (ALIAS_LIST *)GetNextNode(List, &Node->Link)
 242      ){
 243     ASSERT(Node->CommandString != NULL);
 244     ASSERT(Node->Alias != NULL);
 245     if (StrCmp(Node->Alias, Alias)==0) {
 246       RemoveEntryList(&Node->Link);
 247       FreePool(Node->Alias);
 248       FreePool(Node->CommandString);
 249       FreePool(Node);
 250       return (TRUE);
 251     }
 252   }
 253   return (FALSE);
 254 }
 255
 256 /**
 257   Function to determine whether a string is decimal or hex representation of a number
 258   and return the number converted from the string.
 259
 260   @param[in] String   String representation of a number
 261
 262   @return             the number
 263   @retval (UINTN)(-1) An error ocurred.
 264 **/
 265 UINTN
 266 EFIAPI
 267 ReturnUintn(
 268   IN CONST CHAR16 *String
 269   )
 270 {
 271   UINT64        RetVal;
 272
 273   if (!EFI_ERROR(ShellConvertStringToUint64(String, &RetVal, FALSE, TRUE))) {
 274     return ((UINTN)RetVal);
 275   }
 276   return ((UINTN)(-1));
 277 }
 278
 279 /**
 280   Function for 'for' command.
 281
 282   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
 283   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
 284 **/
 285 SHELL_STATUS
 286 EFIAPI
 287 ShellCommandRunFor (
 288   IN EFI_HANDLE        ImageHandle,
 289   IN EFI_SYSTEM_TABLE  *SystemTable
 290   )
 291 {
 292   EFI_STATUS          Status;
 293   SHELL_STATUS        ShellStatus;
 294   SCRIPT_FILE         *CurrentScriptFile;
 295   CHAR16              *ArgSet;
 296   CHAR16              *ArgSetWalker;
 297   UINTN               ArgSize;
 298   UINTN               LoopVar;
 299   SHELL_FOR_INFO      *Info;
 300   CHAR16              *TempString;
 301   CHAR16              *TempSpot;
 302   BOOLEAN             FirstPass;
 303   EFI_SHELL_FILE_INFO *Node;
 304   EFI_SHELL_FILE_INFO *FileList;
 305   UINTN               NewSize;
 306
 307   ArgSet              = NULL;
 308   ArgSize             = 0;
 309   ShellStatus         = SHELL_SUCCESS;
 310   ArgSetWalker        = NULL;
 311   TempString          = NULL;
 312   FirstPass           = FALSE;
 313
 314   //
 315   // initialize the shell lib (we must be in non-auto-init...)
 316   //
 317   Status = ShellInitialize();
 318   ASSERT_EFI_ERROR(Status);
 319
 320   Status = CommandInit();
 321   ASSERT_EFI_ERROR(Status);
 322
 323   if (!gEfiShellProtocol->BatchIsActive()) {
 324     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"For");
 325     return (SHELL_UNSUPPORTED);
 326   }
 327
 328   if (gEfiShellParametersProtocol->Argc < 4) {
 329     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle);
 330     return (SHELL_INVALID_PARAMETER);
 331   }
 332
 333   CurrentScriptFile = ShellCommandGetCurrentScriptFile();
 334   ASSERT(CurrentScriptFile != NULL);
 335
 336   if ((CurrentScriptFile->CurrentCommand != NULL) && (CurrentScriptFile->CurrentCommand->Data == NULL)) {
 337     FirstPass = TRUE;
 338
 339     //
 340     // Make sure that an End exists.
 341     //
 342     if (!MoveToTag(GetNextNode, L"endfor", L"for", NULL, CurrentScriptFile, TRUE, TRUE, FALSE)) {
 343       ShellPrintHiiEx(
 344         -1,
 345         -1,
 346         NULL,
 347         STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
 348         gShellLevel1HiiHandle,
 349         L"EndFor",
 350         L"For",
 351         CurrentScriptFile->CurrentCommand->Line);
 352       return (SHELL_DEVICE_ERROR);
 353     }
 354
 355     //
 356     // Process the line.
 357     //
 358     if (gEfiShellParametersProtocol->Argv[1][0] != L'%' || gEfiShellParametersProtocol->Argv[1][2] != CHAR_NULL
 359       ||!((gEfiShellParametersProtocol->Argv[1][1] >= L'a' && gEfiShellParametersProtocol->Argv[1][1] <= L'z')
 360        ||(gEfiShellParametersProtocol->Argv[1][1] >= L'A' && gEfiShellParametersProtocol->Argv[1][1] <= L'Z'))
 361      ) {
 362       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_INV_VAR), gShellLevel1HiiHandle, gEfiShellParametersProtocol->Argv[1]);
 363       return (SHELL_INVALID_PARAMETER);
 364     }
 365
 366     if (gUnicodeCollation->StriColl(
 367         gUnicodeCollation,
 368         L"in",
 369         gEfiShellParametersProtocol->Argv[2]) == 0) {
 370       for (LoopVar = 0x3 ; LoopVar < gEfiShellParametersProtocol->Argc ; LoopVar++) {
 371         ASSERT((ArgSet == NULL && ArgSize == 0) || (ArgSet != NULL));
 372         if (StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"*") != NULL
 373           ||StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"?") != NULL
 374           ||StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"[") != NULL
 375           ||StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"]") != NULL) {
 376           FileList = NULL;
 377           Status = ShellOpenFileMetaArg ((CHAR16*)gEfiShellParametersProtocol->Argv[LoopVar], EFI_FILE_MODE_READ, &FileList);
 378           if (EFI_ERROR(Status) || FileList == NULL || IsListEmpty(&FileList->Link)) {
 379             ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" \"", 0);
 380             ArgSet = StrnCatGrow(&ArgSet, &ArgSize, gEfiShellParametersProtocol->Argv[LoopVar], 0);
 381             ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 382           } else {
 383             for (Node = (EFI_SHELL_FILE_INFO *)GetFirstNode(&FileList->Link)
 384               ;  !IsNull(&FileList->Link, &Node->Link)
 385               ;  Node = (EFI_SHELL_FILE_INFO *)GetNextNode(&FileList->Link, &Node->Link)
 386              ){
 387               ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" \"", 0);
 388               ArgSet = StrnCatGrow(&ArgSet, &ArgSize, Node->FullName, 0);
 389               ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 390             }
 391             ShellCloseFileMetaArg(&FileList);
 392           }
 393         } else {
 394           ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" \"", 0);
 395           ArgSet = StrnCatGrow(&ArgSet, &ArgSize, gEfiShellParametersProtocol->Argv[LoopVar], 0);
 396           ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 397         }
 398       }
 399       if (ArgSet == NULL) {
 400         ShellStatus = SHELL_OUT_OF_RESOURCES;
 401       } else {
 402         //
 403         // set up for an 'in' for loop
 404         //
 405         NewSize = StrSize(ArgSet);
 406         NewSize += sizeof(SHELL_FOR_INFO)+StrSize(gEfiShellParametersProtocol->Argv[1]);
 407         Info = AllocateZeroPool(NewSize);
 408         ASSERT(Info != NULL);
 409         Info->Signature = SHELL_FOR_INFO_SIGNATURE;
 410         CopyMem(Info->Set, ArgSet, StrSize(ArgSet));
 411         NewSize = StrSize(gEfiShellParametersProtocol->Argv[1]);
 412         CopyMem(Info->Set+(StrSize(ArgSet)/sizeof(Info->Set[0])), gEfiShellParametersProtocol->Argv[1], NewSize);
 413         Info->ReplacementName = Info->Set+StrSize(ArgSet)/sizeof(Info->Set[0]);
 414         Info->CurrentValue  = (CHAR16*)Info->Set;
 415         Info->Step          = 0;
 416         Info->Current       = 0;
 417         Info->End           = 0;
 418
 419         if (InternalIsAliasOnList(Info->ReplacementName, &CurrentScriptFile->SubstList)) {
 420           Info->RemoveSubstAlias  = FALSE;
 421         } else {
 422           Info->RemoveSubstAlias  = TRUE;
 423         }
 424         CurrentScriptFile->CurrentCommand->Data = Info;
 425       }
 426     } else if (gUnicodeCollation->StriColl(
 427         gUnicodeCollation,
 428         L"run",
 429         gEfiShellParametersProtocol->Argv[2]) == 0) {
 430       for (LoopVar = 0x3 ; LoopVar < gEfiShellParametersProtocol->Argc ; LoopVar++) {
 431         ASSERT((ArgSet == NULL && ArgSize == 0) || (ArgSet != NULL));
 432         if (ArgSet == NULL) {
 433 //        ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 434         } else {
 435           ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" ", 0);
 436         }
 437         ArgSet = StrnCatGrow(&ArgSet, &ArgSize, gEfiShellParametersProtocol->Argv[LoopVar], 0);
 438 //        ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" ", 0);
 439       }
 440       if (ArgSet == NULL) {
 441         ShellStatus = SHELL_OUT_OF_RESOURCES;
 442       } else {
 443         //
 444         // set up for a 'run' for loop
 445         //
 446         Info = AllocateZeroPool(sizeof(SHELL_FOR_INFO)+StrSize(gEfiShellParametersProtocol->Argv[1]));
 447         ASSERT(Info != NULL);
 448         Info->Signature = SHELL_FOR_INFO_SIGNATURE;
 449         CopyMem(Info->Set, gEfiShellParametersProtocol->Argv[1], StrSize(gEfiShellParametersProtocol->Argv[1]));
 450         Info->ReplacementName = Info->Set;
 451         Info->CurrentValue    = NULL;
 452         ArgSetWalker            = ArgSet;
 453         if (ArgSetWalker[0] != L'(') {
 454           ShellPrintHiiEx(
 455             -1,
 456             -1,
 457             NULL,
 458             STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 459             gShellLevel1HiiHandle,
 460             ArgSet,
 461             CurrentScriptFile->CurrentCommand->Line);
 462           ShellStatus = SHELL_INVALID_PARAMETER;
 463         } else {
 464           TempSpot = StrStr(ArgSetWalker, L")");
 465           if (TempSpot != NULL) {
 466             TempString = TempSpot+1;
 467             if (*(TempString) != CHAR_NULL) {
 468               while(TempString != NULL && *TempString == L' ') {
 469                 TempString++;
 470               }
 471               if (StrLen(TempString) > 0) {
 472                 TempSpot = NULL;
 473               }
 474             }
 475           }
 476           if (TempSpot == NULL) {
 477             ShellPrintHiiEx(
 478               -1,
 479               -1,
 480               NULL,
 481               STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 482               gShellLevel1HiiHandle,
 483               CurrentScriptFile->CurrentCommand->Line);
 484             ShellStatus = SHELL_INVALID_PARAMETER;
 485           } else {
 486             *TempSpot = CHAR_NULL;
 487             ArgSetWalker++;
 488             while (ArgSetWalker != NULL && ArgSetWalker[0] == L' ') {
 489               ArgSetWalker++;
 490             }
 491             if (!ShellIsValidForNumber(ArgSetWalker)) {
 492               ShellPrintHiiEx(
 493                 -1,
 494                 -1,
 495                 NULL,
 496                 STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 497                 gShellLevel1HiiHandle,
 498                 ArgSet,
 499                 CurrentScriptFile->CurrentCommand->Line);
 500               ShellStatus = SHELL_INVALID_PARAMETER;
 501             } else {
 502               if (ArgSetWalker[0] == L'-') {
 503                 Info->Current = 0 - (INTN)ReturnUintn(ArgSetWalker+1);
 504               } else {
 505                 Info->Current = (INTN)ReturnUintn(ArgSetWalker);
 506               }
 507               ArgSetWalker  = StrStr(ArgSetWalker, L" ");
 508               while (ArgSetWalker != NULL && ArgSetWalker[0] == L' ') {
 509                 ArgSetWalker++;
 510               }
 511               if (ArgSetWalker == NULL || *ArgSetWalker == CHAR_NULL || !ShellIsValidForNumber(ArgSetWalker)){
 512                 ShellPrintHiiEx(
 513                   -1,
 514                   -1,
 515                   NULL,
 516                   STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 517                   gShellLevel1HiiHandle,
 518                   ArgSet,
 519                   CurrentScriptFile->CurrentCommand->Line);
 520                 ShellStatus = SHELL_INVALID_PARAMETER;
 521               } else {
 522                 if (ArgSetWalker[0] == L'-') {
 523                   Info->End = 0 - (INTN)ReturnUintn(ArgSetWalker+1);
 524                 } else {
 525                   Info->End = (INTN)ReturnUintn(ArgSetWalker);
 526                 }
 527                 if (Info->Current < Info->End) {
 528                   Info->Step            = 1;
 529                 } else {
 530                   Info->Step            = -1;
 531                 }
 532
 533                 ArgSetWalker  = StrStr(ArgSetWalker, L" ");
 534                 while (ArgSetWalker != NULL && ArgSetWalker[0] == L' ') {
 535                   ArgSetWalker++;
 536                 }
 537                 if (ArgSetWalker != NULL && *ArgSetWalker != CHAR_NULL) {
 538                   if (ArgSetWalker == NULL || *ArgSetWalker == CHAR_NULL || !ShellIsValidForNumber(ArgSetWalker)){
 539                     ShellPrintHiiEx(
 540                       -1,
 541                       -1,
 542                       NULL,
 543                       STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 544                       gShellLevel1HiiHandle,
 545                       ArgSet,
 546                       CurrentScriptFile->CurrentCommand->Line);
 547                     ShellStatus = SHELL_INVALID_PARAMETER;
 548                   } else {
 549                     if (*ArgSetWalker == L')') {
 550                       ASSERT(Info->Step == 1 || Info->Step == -1);
 551                     } else {
 552                       if (ArgSetWalker[0] == L'-') {
 553                         Info->Step = 0 - (INTN)ReturnUintn(ArgSetWalker+1);
 554                       } else {
 555                         Info->Step = (INTN)ReturnUintn(ArgSetWalker);
 556                       }
 557
 558                       if (StrStr(ArgSetWalker, L" ") != NULL) {
 559                         ShellPrintHiiEx(
 560                           -1,
 561                           -1,
 562                           NULL,
 563                           STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 564                           gShellLevel1HiiHandle,
 565                           ArgSet,
 566                           CurrentScriptFile->CurrentCommand->Line);
 567                         ShellStatus = SHELL_INVALID_PARAMETER;
 568                       }
 569                     }
 570                   }
 571
 572                 }
 573               }
 574             }
 575           }
 576         }
 577         if (ShellStatus == SHELL_SUCCESS) {
 578           if (InternalIsAliasOnList(Info->ReplacementName, &CurrentScriptFile->SubstList)) {
 579             Info->RemoveSubstAlias  = FALSE;
 580           } else {
 581             Info->RemoveSubstAlias  = TRUE;
 582           }
 583         }
 584         if (CurrentScriptFile->CurrentCommand != NULL) {
 585           CurrentScriptFile->CurrentCommand->Data = Info;
 586         }
 587       }
 588     } else {
 589       ShellPrintHiiEx(
 590         -1,
 591         -1,
 592         NULL,
 593         STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 594         gShellLevel1HiiHandle,
 595         ArgSet,
 596         CurrentScriptFile!=NULL
 597           && CurrentScriptFile->CurrentCommand!=NULL
 598           ? CurrentScriptFile->CurrentCommand->Line:0);
 599       ShellStatus = SHELL_INVALID_PARAMETER;
 600     }
 601   } else {
 602     //
 603     // These need to be NULL since they are used to determine if this is the first pass later on...
 604     //
 605     ASSERT(ArgSetWalker == NULL);
 606     ASSERT(ArgSet       == NULL);
 607   }
 608
 609   if (CurrentScriptFile != NULL && CurrentScriptFile->CurrentCommand != NULL) {
 610     Info = (SHELL_FOR_INFO*)CurrentScriptFile->CurrentCommand->Data;
 611     if (CurrentScriptFile->CurrentCommand->Reset) {
 612       Info->CurrentValue  = (CHAR16*)Info->Set;
 613       FirstPass = TRUE;
 614       CurrentScriptFile->CurrentCommand->Reset = FALSE;
 615     }
 616   } else {
 617     ShellStatus = SHELL_UNSUPPORTED;
 618     Info = NULL;
 619   }
 620   if (ShellStatus == SHELL_SUCCESS) {
 621     ASSERT(Info != NULL);
 622     if (Info->Step != 0) {
 623       //
 624       // only advance if not the first pass
 625       //
 626       if (!FirstPass) {
 627         //
 628         // sequence version of for loop...
 629         //
 630         Info->Current += Info->Step;
 631       }
 632
 633       TempString = AllocateZeroPool(50*sizeof(CHAR16));
 634       UnicodeSPrint(TempString, 50*sizeof(CHAR16), L"%d", Info->Current);
 635       InternalUpdateAliasOnList(Info->ReplacementName, TempString, &CurrentScriptFile->SubstList);
 636       FreePool(TempString);
 637
 638       if ((Info->Step > 0 && Info->Current > Info->End) || (Info->Step < 0 && Info->Current < Info->End)) {
 639         CurrentScriptFile->CurrentCommand->Data = NULL;
 640         //
 641         // find the matching endfor (we're done with the loop)
 642         //
 643         if (!MoveToTag(GetNextNode, L"endfor", L"for", NULL, CurrentScriptFile, TRUE, FALSE, FALSE)) {
 644           ShellPrintHiiEx(
 645             -1,
 646             -1,
 647             NULL,
 648             STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
 649             gShellLevel1HiiHandle,
 650             L"EndFor",
 651             L"For",
 652             CurrentScriptFile!=NULL
 653               && CurrentScriptFile->CurrentCommand!=NULL
 654               ? CurrentScriptFile->CurrentCommand->Line:0);
 655           ShellStatus = SHELL_DEVICE_ERROR;
 656         }
 657         if (Info->RemoveSubstAlias) {
 658           //
 659           // remove item from list
 660           //
 661           InternalRemoveAliasFromList(Info->ReplacementName, &CurrentScriptFile->SubstList);
 662         }
 663         FreePool(Info);
 664       }
 665     } else {
 666       //
 667       // Must be in 'in' version of for loop...
 668       //
 669       ASSERT(Info->Set != NULL);
 670       if (Info->CurrentValue != NULL && *Info->CurrentValue != CHAR_NULL) {
 671         if (Info->CurrentValue[0] == L' ') {
 672           Info->CurrentValue++;
 673         }
 674         if (Info->CurrentValue[0] == L'\"') {
 675           Info->CurrentValue++;
 676         }
 677         //
 678         // do the next one of the set
 679         //
 680         ASSERT(TempString == NULL);
 681         TempString = StrnCatGrow(&TempString, NULL, Info->CurrentValue, 0);
 682         if (TempString == NULL) {
 683           ShellStatus = SHELL_OUT_OF_RESOURCES;
 684         } else {
 685           TempSpot   = StrStr(TempString, L"\" \"");
 686           if (TempSpot != NULL) {
 687             *TempSpot = CHAR_NULL;
 688           }
 689           while (TempString[StrLen(TempString)-1] == L'\"') {
 690             TempString[StrLen(TempString)-1] = CHAR_NULL;
 691           }
 692           InternalUpdateAliasOnList(Info->ReplacementName, TempString, &CurrentScriptFile->SubstList);
 693           Info->CurrentValue += StrLen(TempString);
 694
 695           if (Info->CurrentValue[0] == L'\"') {
 696             Info->CurrentValue++;
 697           }
 698           while (Info->CurrentValue[0] == L' ') {
 699             Info->CurrentValue++;
 700           }
 701           if (Info->CurrentValue[0] == L'\"') {
 702             Info->CurrentValue++;
 703           }
 704           FreePool(TempString);
 705         }
 706       } else {
 707         CurrentScriptFile->CurrentCommand->Data = NULL;
 708         //
 709         // find the matching endfor (we're done with the loop)
 710         //
 711         if (!MoveToTag(GetNextNode, L"endfor", L"for", NULL, CurrentScriptFile, TRUE, FALSE, FALSE)) {
 712           ShellPrintHiiEx(
 713             -1,
 714             -1,
 715             NULL,
 716             STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
 717             gShellLevel1HiiHandle,
 718             L"EndFor",
 719             L"For",
 720             CurrentScriptFile!=NULL
 721               && CurrentScriptFile->CurrentCommand!=NULL
 722               ? CurrentScriptFile->CurrentCommand->Line:0);
 723           ShellStatus = SHELL_DEVICE_ERROR;
 724         }
 725         if (Info->RemoveSubstAlias) {
 726           //
 727           // remove item from list
 728           //
 729           InternalRemoveAliasFromList(Info->ReplacementName, &CurrentScriptFile->SubstList);
 730         }
 731         FreePool(Info);
 732       }
 733     }
 734   }
 735   if (ArgSet != NULL) {
 736     FreePool(ArgSet);
 737   }
 738   return (ShellStatus);
 739 }
 740