ShellPkg/Library/UefiShellLevel1CommandsLib/For.c

   1 /** @file
   2   Main file for endfor and for shell level 1 functions.
   3
   4   Copyright (c) 2009 - 2012, 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 for 'for' command.
 258
 259   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
 260   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
 261 **/
 262 SHELL_STATUS
 263 EFIAPI
 264 ShellCommandRunFor (
 265   IN EFI_HANDLE        ImageHandle,
 266   IN EFI_SYSTEM_TABLE  *SystemTable
 267   )
 268 {
 269   EFI_STATUS          Status;
 270   SHELL_STATUS        ShellStatus;
 271   SCRIPT_FILE         *CurrentScriptFile;
 272   CHAR16              *ArgSet;
 273   CHAR16              *ArgSetWalker;
 274   UINTN               ArgSize;
 275   UINTN               LoopVar;
 276   SHELL_FOR_INFO      *Info;
 277   CHAR16              *TempString;
 278   CHAR16              *TempSpot;
 279   BOOLEAN             FirstPass;
 280   EFI_SHELL_FILE_INFO *Node;
 281   EFI_SHELL_FILE_INFO *FileList;
 282   UINTN               NewSize;
 283
 284   ArgSet              = NULL;
 285   ArgSize             = 0;
 286   ShellStatus         = SHELL_SUCCESS;
 287   ArgSetWalker        = NULL;
 288   TempString          = NULL;
 289   FirstPass           = FALSE;
 290
 291   //
 292   // initialize the shell lib (we must be in non-auto-init...)
 293   //
 294   Status = ShellInitialize();
 295   ASSERT_EFI_ERROR(Status);
 296
 297   Status = CommandInit();
 298   ASSERT_EFI_ERROR(Status);
 299
 300   if (!gEfiShellProtocol->BatchIsActive()) {
 301     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"For");
 302     return (SHELL_UNSUPPORTED);
 303   }
 304
 305   if (gEfiShellParametersProtocol->Argc < 4) {
 306     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle);
 307     return (SHELL_INVALID_PARAMETER);
 308   }
 309
 310   CurrentScriptFile = ShellCommandGetCurrentScriptFile();
 311   ASSERT(CurrentScriptFile != NULL);
 312
 313   if (CurrentScriptFile->CurrentCommand->Data == NULL) {
 314     FirstPass = TRUE;
 315
 316     //
 317     // Make sure that an End exists.
 318     //
 319     if (!MoveToTag(GetNextNode, L"endfor", L"for", NULL, CurrentScriptFile, TRUE, TRUE, FALSE)) {
 320       ShellPrintHiiEx(
 321         -1,
 322         -1,
 323         NULL,
 324         STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
 325         gShellLevel1HiiHandle,
 326         L"EndFor",
 327         L"For",
 328         CurrentScriptFile->CurrentCommand!=NULL
 329           ?CurrentScriptFile->CurrentCommand->Line:0);
 330       return (SHELL_DEVICE_ERROR);
 331     }
 332
 333     //
 334     // Process the line.
 335     //
 336     if (gEfiShellParametersProtocol->Argv[1][0] != L'%' || gEfiShellParametersProtocol->Argv[1][2] != CHAR_NULL
 337       ||!((gEfiShellParametersProtocol->Argv[1][1] >= L'a' && gEfiShellParametersProtocol->Argv[1][1] <= L'z')
 338        ||(gEfiShellParametersProtocol->Argv[1][1] >= L'A' && gEfiShellParametersProtocol->Argv[1][1] <= L'Z'))
 339      ) {
 340       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_INV_VAR), gShellLevel1HiiHandle, gEfiShellParametersProtocol->Argv[1]);
 341       return (SHELL_INVALID_PARAMETER);
 342     }
 343
 344     if (gUnicodeCollation->StriColl(
 345         gUnicodeCollation,
 346         L"in",
 347         gEfiShellParametersProtocol->Argv[2]) == 0) {
 348       for (LoopVar = 0x3 ; LoopVar < gEfiShellParametersProtocol->Argc ; LoopVar++) {
 349         ASSERT((ArgSet == NULL && ArgSize == 0) || (ArgSet != NULL));
 350         if (ArgSet == NULL) {
 351   //        ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 352         } else {
 353           ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" \"", 0);
 354         }
 355         if (StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"*") != NULL
 356           ||StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"?") != NULL
 357           ||StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"[") != NULL
 358           ||StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"]") != NULL) {
 359           FileList = NULL;
 360           Status = ShellOpenFileMetaArg ((CHAR16*)gEfiShellParametersProtocol->Argv[LoopVar], EFI_FILE_MODE_READ, &FileList);
 361           if (EFI_ERROR(Status) || FileList == NULL || IsListEmpty(&FileList->Link)) {
 362             ArgSet = StrnCatGrow(&ArgSet, &ArgSize, gEfiShellParametersProtocol->Argv[LoopVar], 0);
 363           } else {
 364             for (Node = (EFI_SHELL_FILE_INFO *)GetFirstNode(&FileList->Link)
 365               ;  !IsNull(&FileList->Link, &Node->Link)
 366               ;  Node = (EFI_SHELL_FILE_INFO *)GetNextNode(&FileList->Link, &Node->Link)
 367              ){
 368               ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" \"", 0);
 369               ArgSet = StrnCatGrow(&ArgSet, &ArgSize, Node->FullName, 0);
 370               ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 371             }
 372             ShellCloseFileMetaArg(&FileList);
 373           }
 374         } else {
 375           ArgSet = StrnCatGrow(&ArgSet, &ArgSize, gEfiShellParametersProtocol->Argv[LoopVar], 0);
 376         }
 377         ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 378       }
 379       if (ArgSet == NULL) {
 380         ShellStatus = SHELL_OUT_OF_RESOURCES;
 381       } else {
 382         //
 383         // set up for an 'in' for loop
 384         //
 385         NewSize = StrSize(ArgSet);
 386         NewSize += sizeof(SHELL_FOR_INFO)+StrSize(gEfiShellParametersProtocol->Argv[1]);
 387         Info = AllocateZeroPool(NewSize);
 388         ASSERT(Info != NULL);
 389         Info->Signature = SHELL_FOR_INFO_SIGNATURE;
 390         CopyMem(Info->Set, ArgSet, StrSize(ArgSet));
 391         NewSize = StrSize(gEfiShellParametersProtocol->Argv[1]);
 392         CopyMem(Info->Set+(StrSize(ArgSet)/sizeof(Info->Set[0])), gEfiShellParametersProtocol->Argv[1], NewSize);
 393         Info->ReplacementName = Info->Set+StrSize(ArgSet)/sizeof(Info->Set[0]);
 394         Info->CurrentValue  = (CHAR16*)Info->Set;
 395         Info->Step          = 0;
 396         Info->Current       = 0;
 397         Info->End           = 0;
 398
 399         if (InternalIsAliasOnList(Info->ReplacementName, &CurrentScriptFile->SubstList)) {
 400           Info->RemoveSubstAlias  = FALSE;
 401         } else {
 402           Info->RemoveSubstAlias  = TRUE;
 403         }
 404         CurrentScriptFile->CurrentCommand->Data = Info;
 405       }
 406     } else if (gUnicodeCollation->StriColl(
 407         gUnicodeCollation,
 408         L"run",
 409         gEfiShellParametersProtocol->Argv[2]) == 0) {
 410       for (LoopVar = 0x3 ; LoopVar < gEfiShellParametersProtocol->Argc ; LoopVar++) {
 411         ASSERT((ArgSet == NULL && ArgSize == 0) || (ArgSet != NULL));
 412         if (ArgSet == NULL) {
 413 //        ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 414         } else {
 415           ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" ", 0);
 416         }
 417         ArgSet = StrnCatGrow(&ArgSet, &ArgSize, gEfiShellParametersProtocol->Argv[LoopVar], 0);
 418 //        ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" ", 0);
 419       }
 420       if (ArgSet == NULL) {
 421         ShellStatus = SHELL_OUT_OF_RESOURCES;
 422       } else {
 423         //
 424         // set up for a 'run' for loop
 425         //
 426         Info = AllocateZeroPool(sizeof(SHELL_FOR_INFO)+StrSize(gEfiShellParametersProtocol->Argv[1]));
 427         ASSERT(Info != NULL);
 428         Info->Signature = SHELL_FOR_INFO_SIGNATURE;
 429         CopyMem(Info->Set, gEfiShellParametersProtocol->Argv[1], StrSize(gEfiShellParametersProtocol->Argv[1]));
 430         Info->ReplacementName = Info->Set;
 431         Info->CurrentValue    = NULL;
 432         ArgSetWalker            = ArgSet;
 433         if (ArgSetWalker[0] != L'(') {
 434           ShellPrintHiiEx(
 435             -1,
 436             -1,
 437             NULL,
 438             STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 439             gShellLevel1HiiHandle,
 440             ArgSet,
 441             CurrentScriptFile!=NULL
 442               && CurrentScriptFile->CurrentCommand!=NULL
 443               ? CurrentScriptFile->CurrentCommand->Line:0);
 444           ShellStatus = SHELL_INVALID_PARAMETER;
 445         } else {
 446           TempSpot = StrStr(ArgSetWalker, L")");
 447           if (TempSpot != NULL) {
 448             TempString = TempSpot+1;
 449             if (*(TempString) != CHAR_NULL) {
 450               while(TempString != NULL && *TempString == L' ') {
 451                 TempString++;
 452               }
 453               if (StrLen(TempString) > 0) {
 454                 TempSpot = NULL;
 455               }
 456             }
 457           }
 458           if (TempSpot == NULL) {
 459             ShellPrintHiiEx(
 460               -1,
 461               -1,
 462               NULL,
 463               STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 464               gShellLevel1HiiHandle,
 465               CurrentScriptFile!=NULL
 466                 && CurrentScriptFile->CurrentCommand!=NULL
 467                 ? CurrentScriptFile->CurrentCommand->Line:0);
 468             ShellStatus = SHELL_INVALID_PARAMETER;
 469           } else {
 470             *TempSpot = CHAR_NULL;
 471             ArgSetWalker++;
 472             while (ArgSetWalker != NULL && ArgSetWalker[0] == L' ') {
 473               ArgSetWalker++;
 474             }
 475             if (!ShellIsValidForNumber(ArgSetWalker)) {
 476               ShellPrintHiiEx(
 477                 -1,
 478                 -1,
 479                 NULL,
 480                 STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 481                 gShellLevel1HiiHandle,
 482                 ArgSet,
 483                 CurrentScriptFile!=NULL
 484                   && CurrentScriptFile->CurrentCommand!=NULL
 485                   ? CurrentScriptFile->CurrentCommand->Line:0);
 486               ShellStatus = SHELL_INVALID_PARAMETER;
 487             } else {
 488               if (ArgSetWalker[0] == L'-') {
 489                 Info->Current = 0 - (INTN)ShellStrToUintn(ArgSetWalker+1);
 490               } else {
 491                 Info->Current = (INTN)ShellStrToUintn(ArgSetWalker);
 492               }
 493               ArgSetWalker  = StrStr(ArgSetWalker, L" ");
 494               while (ArgSetWalker != NULL && ArgSetWalker[0] == L' ') {
 495                 ArgSetWalker++;
 496               }
 497               if (ArgSetWalker == NULL || *ArgSetWalker == CHAR_NULL || !ShellIsValidForNumber(ArgSetWalker)){
 498                 ShellPrintHiiEx(
 499                   -1,
 500                   -1,
 501                   NULL,
 502                   STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 503                   gShellLevel1HiiHandle,
 504                   ArgSet,
 505                   CurrentScriptFile!=NULL
 506                     && CurrentScriptFile->CurrentCommand!=NULL
 507                     ? CurrentScriptFile->CurrentCommand->Line:0);
 508                 ShellStatus = SHELL_INVALID_PARAMETER;
 509               } else {
 510                 if (ArgSetWalker[0] == L'-') {
 511                   Info->End = 0 - (INTN)ShellStrToUintn(ArgSetWalker+1);
 512                 } else {
 513                   Info->End = (INTN)ShellStrToUintn(ArgSetWalker);
 514                 }
 515                 if (Info->Current < Info->End) {
 516                   Info->Step            = 1;
 517                 } else {
 518                   Info->Step            = -1;
 519                 }
 520
 521                 ArgSetWalker  = StrStr(ArgSetWalker, L" ");
 522                 while (ArgSetWalker != NULL && ArgSetWalker[0] == L' ') {
 523                   ArgSetWalker++;
 524                 }
 525                 if (ArgSetWalker != NULL && *ArgSetWalker != CHAR_NULL) {
 526                   if (ArgSetWalker == NULL || *ArgSetWalker == CHAR_NULL || !ShellIsValidForNumber(ArgSetWalker)){
 527                     ShellPrintHiiEx(
 528                       -1,
 529                       -1,
 530                       NULL,
 531                       STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 532                       gShellLevel1HiiHandle,
 533                       ArgSet,
 534                       CurrentScriptFile!=NULL
 535                         && CurrentScriptFile->CurrentCommand!=NULL
 536                         ? CurrentScriptFile->CurrentCommand->Line:0);
 537                     ShellStatus = SHELL_INVALID_PARAMETER;
 538                   } else {
 539                     if (*ArgSetWalker == L')') {
 540                       ASSERT(Info->Step == 1 || Info->Step == -1);
 541                     } else {
 542                       if (ArgSetWalker[0] == L'-') {
 543                         Info->Step = 0 - (INTN)ShellStrToUintn(ArgSetWalker+1);
 544                       } else {
 545                         Info->Step = (INTN)ShellStrToUintn(ArgSetWalker);
 546                       }
 547
 548                       if (StrStr(ArgSetWalker, L" ") != NULL) {
 549                         ShellPrintHiiEx(
 550                           -1,
 551                           -1,
 552                           NULL,
 553                           STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 554                           gShellLevel1HiiHandle,
 555                           ArgSet,
 556                           CurrentScriptFile!=NULL
 557                             && CurrentScriptFile->CurrentCommand!=NULL
 558                             ? CurrentScriptFile->CurrentCommand->Line:0);
 559                         ShellStatus = SHELL_INVALID_PARAMETER;
 560                       }
 561                     }
 562                   }
 563
 564                 }
 565               }
 566             }
 567           }
 568         }
 569         if (ShellStatus == SHELL_SUCCESS) {
 570           if (InternalIsAliasOnList(Info->ReplacementName, &CurrentScriptFile->SubstList)) {
 571             Info->RemoveSubstAlias  = FALSE;
 572           } else {
 573             Info->RemoveSubstAlias  = TRUE;
 574           }
 575         }
 576         if (CurrentScriptFile->CurrentCommand != NULL) {
 577           CurrentScriptFile->CurrentCommand->Data = Info;
 578         }
 579       }
 580     } else {
 581       ShellPrintHiiEx(
 582         -1,
 583         -1,
 584         NULL,
 585         STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 586         gShellLevel1HiiHandle,
 587         ArgSet,
 588         CurrentScriptFile!=NULL
 589           && CurrentScriptFile->CurrentCommand!=NULL
 590           ? CurrentScriptFile->CurrentCommand->Line:0);
 591       ShellStatus = SHELL_INVALID_PARAMETER;
 592     }
 593   } else {
 594     //
 595     // These need to be NULL since they are used to determine if this is the first pass later on...
 596     //
 597     ASSERT(ArgSetWalker == NULL);
 598     ASSERT(ArgSet       == NULL);
 599   }
 600
 601   if (CurrentScriptFile != NULL && CurrentScriptFile->CurrentCommand != NULL) {
 602     Info = (SHELL_FOR_INFO*)CurrentScriptFile->CurrentCommand->Data;
 603     if (CurrentScriptFile->CurrentCommand->Reset) {
 604       Info->CurrentValue  = (CHAR16*)Info->Set;
 605       FirstPass = TRUE;
 606       CurrentScriptFile->CurrentCommand->Reset = FALSE;
 607     }
 608   } else {
 609     ShellStatus = SHELL_UNSUPPORTED;
 610     Info = NULL;
 611   }
 612   if (ShellStatus == SHELL_SUCCESS) {
 613     ASSERT(Info != NULL);
 614     if (Info->Step != 0) {
 615       //
 616       // only advance if not the first pass
 617       //
 618       if (!FirstPass) {
 619         //
 620         // sequence version of for loop...
 621         //
 622         Info->Current += Info->Step;
 623       }
 624
 625       TempString = AllocateZeroPool(50*sizeof(CHAR16));
 626       UnicodeSPrint(TempString, 50*sizeof(CHAR16), L"%d", Info->Current);
 627       InternalUpdateAliasOnList(Info->ReplacementName, TempString, &CurrentScriptFile->SubstList);
 628       FreePool(TempString);
 629
 630       if ((Info->Step > 0 && Info->Current > Info->End) || (Info->Step < 0 && Info->Current < Info->End)) {
 631         CurrentScriptFile->CurrentCommand->Data = NULL;
 632         //
 633         // find the matching endfor (we're done with the loop)
 634         //
 635         if (!MoveToTag(GetNextNode, L"endfor", L"for", NULL, CurrentScriptFile, TRUE, FALSE, FALSE)) {
 636           ShellPrintHiiEx(
 637             -1,
 638             -1,
 639             NULL,
 640             STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
 641             gShellLevel1HiiHandle,
 642             L"EndFor",
 643             L"For",
 644             CurrentScriptFile!=NULL
 645               && CurrentScriptFile->CurrentCommand!=NULL
 646               ? CurrentScriptFile->CurrentCommand->Line:0);
 647           ShellStatus = SHELL_DEVICE_ERROR;
 648         }
 649         if (Info->RemoveSubstAlias) {
 650           //
 651           // remove item from list
 652           //
 653           InternalRemoveAliasFromList(Info->ReplacementName, &CurrentScriptFile->SubstList);
 654         }
 655         FreePool(Info);
 656       }
 657     } else {
 658       //
 659       // Must be in 'in' version of for loop...
 660       //
 661       ASSERT(Info->Set != NULL);
 662       if (Info->CurrentValue != NULL && *Info->CurrentValue != CHAR_NULL) {
 663         if (Info->CurrentValue[0] == L' ') {
 664           Info->CurrentValue++;
 665         }
 666         if (Info->CurrentValue[0] == L'\"') {
 667           Info->CurrentValue++;
 668         }
 669         //
 670         // do the next one of the set
 671         //
 672         ASSERT(TempString == NULL);
 673         TempString = StrnCatGrow(&TempString, NULL, Info->CurrentValue, 0);
 674         if (TempString == NULL) {
 675           ShellStatus = SHELL_OUT_OF_RESOURCES;
 676         } else {
 677           TempSpot   = StrStr(TempString, L"\" \"");
 678           if (TempSpot != NULL) {
 679             *TempSpot = CHAR_NULL;
 680           }
 681           while (TempString[StrLen(TempString)-1] == L'\"') {
 682             TempString[StrLen(TempString)-1] = CHAR_NULL;
 683           }
 684           InternalUpdateAliasOnList(Info->ReplacementName, TempString, &CurrentScriptFile->SubstList);
 685           Info->CurrentValue += StrLen(TempString);
 686
 687           if (Info->CurrentValue[0] == L'\"') {
 688             Info->CurrentValue++;
 689           }
 690           while (Info->CurrentValue[0] == L' ') {
 691             Info->CurrentValue++;
 692           }
 693           if (Info->CurrentValue[0] == L'\"') {
 694             Info->CurrentValue++;
 695           }
 696           FreePool(TempString);
 697         }
 698       } else {
 699         CurrentScriptFile->CurrentCommand->Data = NULL;
 700         //
 701         // find the matching endfor (we're done with the loop)
 702         //
 703         if (!MoveToTag(GetNextNode, L"endfor", L"for", NULL, CurrentScriptFile, TRUE, FALSE, FALSE)) {
 704           ShellPrintHiiEx(
 705             -1,
 706             -1,
 707             NULL,
 708             STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
 709             gShellLevel1HiiHandle,
 710             L"EndFor",
 711             L"For",
 712             CurrentScriptFile!=NULL
 713               && CurrentScriptFile->CurrentCommand!=NULL
 714               ? CurrentScriptFile->CurrentCommand->Line:0);
 715           ShellStatus = SHELL_DEVICE_ERROR;
 716         }
 717         if (Info->RemoveSubstAlias) {
 718           //
 719           // remove item from list
 720           //
 721           InternalRemoveAliasFromList(Info->ReplacementName, &CurrentScriptFile->SubstList);
 722         }
 723         FreePool(Info);
 724       }
 725     }
 726   }
 727   if (ArgSet != NULL) {
 728     FreePool(ArgSet);
 729   }
 730   return (ShellStatus);
 731 }
 732