ShellPkg/Library/UefiShellLevel2CommandsLib/Cd.c

   1 /** @file
   2   Main file for attrib shell level 2 function.
   3
   4   Copyright (c) 2015, Hewlett-Packard Development Company, L.P.<BR>
   5   Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
   6   This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include "UefiShellLevel2CommandsLib.h"
  17
  18 /**
  19   Function for 'cd' command.
  20
  21   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  22   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  23 **/
  24 SHELL_STATUS
  25 EFIAPI
  26 ShellCommandRunCd (
  27   IN EFI_HANDLE        ImageHandle,
  28   IN EFI_SYSTEM_TABLE  *SystemTable
  29   )
  30 {
  31   EFI_STATUS        Status;
  32   LIST_ENTRY        *Package;
  33   CONST CHAR16      *Directory;
  34   CHAR16            *Path;
  35   CHAR16            *Drive;
  36   UINTN             DriveSize;
  37   CHAR16            *ProblemParam;
  38   SHELL_STATUS      ShellStatus;
  39   SHELL_FILE_HANDLE Handle;
  40   CONST CHAR16      *Param1;
  41   CHAR16            *Param1Copy;
  42   CHAR16*           Walker;
  43
  44   ProblemParam = NULL;
  45   ShellStatus = SHELL_SUCCESS;
  46   Drive = NULL;
  47   DriveSize = 0;
  48
  49   Status = CommandInit();
  50   ASSERT_EFI_ERROR(Status);
  51
  52   //
  53   // initialize the shell lib (we must be in non-auto-init...)
  54   //
  55   Status = ShellInitialize();
  56   ASSERT_EFI_ERROR(Status);
  57
  58   //
  59   // parse the command line
  60   //
  61   Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
  62   if (EFI_ERROR(Status)) {
  63     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  64       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, L"cd", ProblemParam);
  65       FreePool(ProblemParam);
  66       ShellStatus = SHELL_INVALID_PARAMETER;
  67     } else {
  68       ASSERT(FALSE);
  69     }
  70   }
  71
  72   //
  73   // check for "-?"
  74   //
  75   if (ShellCommandLineGetFlag(Package, L"-?")) {
  76     ASSERT(FALSE);
  77   } else if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
  78     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"cd");
  79     ShellStatus = SHELL_INVALID_PARAMETER;
  80   } else {
  81     //
  82     // remember that param 0 is the command name
  83     // If there are 0 value parameters, then print the current directory
  84     // else If there are 2 value parameters, then print the error message
  85     // else If there is  1 value paramerer , then change the directory
  86     //
  87     Param1 = ShellCommandLineGetRawValue(Package, 1);
  88     if (Param1 == NULL) {
  89       //
  90       // display the current directory
  91       //
  92       Directory = ShellGetCurrentDir(NULL);
  93       if (Directory != NULL) {
  94         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_PRINT), gShellLevel2HiiHandle, Directory);
  95       } else {
  96         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle, L"cd");
  97         ShellStatus = SHELL_NOT_FOUND;
  98       }
  99     } else {
 100       Param1Copy = CatSPrint(NULL, L"%s", Param1, NULL);
 101       for (Walker = Param1Copy; Walker != NULL && *Walker != CHAR_NULL ; Walker++) {
 102         if (*Walker == L'\"') {
 103           CopyMem(Walker, Walker+1, StrSize(Walker) - sizeof(Walker[0]));
 104         }
 105       }
 106
 107       if (Param1Copy != NULL) {
 108         Param1Copy = PathCleanUpDirectories(Param1Copy);
 109       }
 110       if (Param1Copy != NULL) {
 111         if (StrCmp(Param1Copy, L".") == 0) {
 112           //
 113           // nothing to do... change to current directory
 114           //
 115         } else if (StrCmp(Param1Copy, L"..") == 0) {
 116           //
 117           // Change up one directory...
 118           //
 119           Directory = ShellGetCurrentDir(NULL);
 120           if (Directory == NULL) {
 121             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle, L"cd");
 122             ShellStatus = SHELL_NOT_FOUND;
 123           } else {
 124             Drive = GetFullyQualifiedPath(Directory);
 125             PathRemoveLastItem(Drive);
 126           }
 127           if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 128             //
 129             // change directory on current drive letter
 130             //
 131             Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 132             if (Status == EFI_NOT_FOUND) {
 133               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 134               ShellStatus = SHELL_NOT_FOUND;
 135             }
 136           }
 137         } else if (StrCmp(Param1Copy, L"\\") == 0) {
 138           //
 139           // Move to root of current drive
 140           //
 141           Directory = ShellGetCurrentDir(NULL);
 142           if (Directory == NULL) {
 143             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle, L"cd");
 144             ShellStatus = SHELL_NOT_FOUND;
 145           } else {
 146             Drive = GetFullyQualifiedPath(Directory);
 147             while (PathRemoveLastItem(Drive)) ;
 148           }
 149           if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 150             //
 151             // change directory on current drive letter
 152             //
 153             Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 154             if (Status == EFI_NOT_FOUND) {
 155               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 156               ShellStatus = SHELL_NOT_FOUND;
 157             }
 158           }
 159         } else if (StrStr(Param1Copy, L":") == NULL) {
 160           //
 161           // change directory without a drive identifier
 162           //
 163           if (ShellGetCurrentDir(NULL) == NULL) {
 164             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle, L"cd");
 165             ShellStatus = SHELL_NOT_FOUND;
 166           } else {
 167             ASSERT((Drive == NULL && DriveSize == 0) || (Drive != NULL));
 168             Drive = StrnCatGrow(&Drive, &DriveSize, ShellGetCurrentDir(NULL), 0);
 169             if (*Param1Copy == L'\\') {
 170               while (PathRemoveLastItem(Drive)) ;
 171               Drive = StrnCatGrow(&Drive, &DriveSize, Param1Copy+1, 0);
 172             } else {
 173               Drive = StrnCatGrow(&Drive, &DriveSize, Param1Copy, 0);
 174             }
 175             //
 176             // Verify that this is a valid directory
 177             //
 178             Status = gEfiShellProtocol->OpenFileByName(Drive, &Handle, EFI_FILE_MODE_READ);
 179             if (EFI_ERROR(Status)) {
 180               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_DIR_NF), gShellLevel2HiiHandle, L"cd", Drive);
 181               ShellStatus = SHELL_NOT_FOUND;
 182             } else if (EFI_ERROR(FileHandleIsDirectory(Handle))) {
 183               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NOT_DIR), gShellLevel2HiiHandle, L"cd", Drive);
 184               ShellStatus = SHELL_NOT_FOUND;
 185             }
 186             if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 187               //
 188               // change directory on current drive letter
 189               //
 190               Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 191               if (Status == EFI_NOT_FOUND) {
 192                 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 193                 ShellStatus = SHELL_NOT_FOUND;
 194               }
 195             }
 196             if (Handle != NULL) {
 197               gEfiShellProtocol->CloseFile(Handle);
 198               DEBUG_CODE(Handle = NULL;);
 199             }
 200           }
 201         } else {
 202           //
 203           // change directory with a drive letter
 204           //
 205           Drive = AllocateCopyPool(StrSize(Param1Copy), Param1Copy);
 206           if (Drive == NULL) {
 207             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_MEM), gShellLevel2HiiHandle, L"cd");
 208             ShellStatus = SHELL_OUT_OF_RESOURCES;
 209           } else {
 210             Path = StrStr(Drive, L":");
 211             ASSERT(Path != NULL);
 212             if (EFI_ERROR(ShellIsDirectory(Param1Copy))) {
 213               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NOT_DIR), gShellLevel2HiiHandle, L"cd", Param1Copy);
 214               ShellStatus = SHELL_NOT_FOUND;
 215             } else if (*(Path+1) == CHAR_NULL) {
 216               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 217               ShellStatus = SHELL_NOT_FOUND;
 218             } else {
 219               *(Path+1) = CHAR_NULL;
 220               if (Path == Drive + StrLen(Drive)) {
 221                 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 222                 ShellStatus = SHELL_NOT_FOUND;
 223               } else {
 224                 Status = gEfiShellProtocol->SetCurDir(Drive, Path+2);
 225                 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_PRINT), gShellLevel2HiiHandle, ShellGetCurrentDir(Drive));
 226               }
 227             }
 228             if (Status == EFI_NOT_FOUND) {
 229               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 230               Status = SHELL_NOT_FOUND;
 231             } else if (EFI_ERROR(Status)) {
 232               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_DIR_NF), gShellLevel2HiiHandle, L"cd", Param1Copy);
 233               Status = SHELL_NOT_FOUND;
 234             }
 235           }
 236         }
 237       }
 238       FreePool(Param1Copy);
 239     }
 240   }
 241
 242   if (Drive != NULL) {
 243     FreePool(Drive);
 244   }
 245   //
 246   // free the command line package
 247   //
 248   ShellCommandLineFreeVarList (Package);
 249
 250   //
 251   // return the status
 252   //
 253   return (ShellStatus);
 254 }
 255