ShellPkg/Library/UefiShellLevel2CommandsLib/Cd.c

   1 /** @file
   2   Main file for attrib shell level 2 function.
   3
   4   Copyright (c) 2009 - 2011, 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 "UefiShellLevel2CommandsLib.h"
  16
  17 /**
  18   Function for 'cd' command.
  19
  20   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  21   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  22 **/
  23 SHELL_STATUS
  24 EFIAPI
  25 ShellCommandRunCd (
  26   IN EFI_HANDLE        ImageHandle,
  27   IN EFI_SYSTEM_TABLE  *SystemTable
  28   )
  29 {
  30   EFI_STATUS        Status;
  31   LIST_ENTRY        *Package;
  32   CONST CHAR16      *Directory;
  33   CHAR16            *Path;
  34   CHAR16            *Drive;
  35   UINTN             DriveSize;
  36   CHAR16            *ProblemParam;
  37   SHELL_STATUS      ShellStatus;
  38   SHELL_FILE_HANDLE Handle;
  39   CONST CHAR16      *Param1;
  40   CHAR16            *Param1Copy;
  41
  42   ProblemParam = NULL;
  43   ShellStatus = SHELL_SUCCESS;
  44   Drive = NULL;
  45   DriveSize = 0;
  46
  47   Status = CommandInit();
  48   ASSERT_EFI_ERROR(Status);
  49
  50   //
  51   // initialize the shell lib (we must be in non-auto-init...)
  52   //
  53   Status = ShellInitialize();
  54   ASSERT_EFI_ERROR(Status);
  55
  56   //
  57   // parse the command line
  58   //
  59   Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
  60   if (EFI_ERROR(Status)) {
  61     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  62       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, ProblemParam);
  63       FreePool(ProblemParam);
  64       ShellStatus = SHELL_INVALID_PARAMETER;
  65     } else {
  66       ASSERT(FALSE);
  67     }
  68   }
  69
  70   //
  71   // check for "-?"
  72   //
  73   if (ShellCommandLineGetFlag(Package, L"-?")) {
  74     ASSERT(FALSE);
  75   } else if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
  76     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle);
  77     ShellStatus = SHELL_INVALID_PARAMETER;
  78   } else {
  79     //
  80     // remember that param 0 is the command name
  81     // If there are 0 value parameters, then print the current directory
  82     // else If there are 2 value parameters, then print the error message
  83     // else If there is  1 value paramerer , then change the directory
  84     //
  85     Param1 = ShellCommandLineGetRawValue(Package, 1);
  86     if (Param1 == NULL) {
  87       //
  88       // display the current directory
  89       //
  90       Directory = ShellGetCurrentDir(NULL);
  91       if (Directory != NULL) {
  92         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_PRINT), gShellLevel2HiiHandle, Directory);
  93       } else {
  94         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle);
  95         ShellStatus = SHELL_NOT_FOUND;
  96       }
  97     } else {
  98       Param1Copy = CatSPrint(NULL, L"%s", Param1, NULL);
  99       if (Param1Copy != NULL) {
 100         Param1Copy = PathCleanUpDirectories(Param1Copy);
 101       }
 102       if (Param1Copy != NULL) {
 103         if (StrCmp(Param1Copy, L".") == 0) {
 104           //
 105           // nothing to do... change to current directory
 106           //
 107         } else if (StrCmp(Param1Copy, L"..") == 0) {
 108           //
 109           // Change up one directory...
 110           //
 111           Directory = ShellGetCurrentDir(NULL);
 112           if (Directory == NULL) {
 113             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle);
 114             ShellStatus = SHELL_NOT_FOUND;
 115           } else {
 116             Drive = GetFullyQualifiedPath(Directory);
 117             PathRemoveLastItem(Drive);
 118           }
 119           if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 120             //
 121             // change directory on current drive letter
 122             //
 123             Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 124             if (Status == EFI_NOT_FOUND) {
 125               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle);
 126               ShellStatus = SHELL_NOT_FOUND;
 127             }
 128           }
 129         } else if (StrCmp(Param1Copy, L"\\") == 0) {
 130           //
 131           // Move to root of current drive
 132           //
 133           Directory = ShellGetCurrentDir(NULL);
 134           if (Directory == NULL) {
 135             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle);
 136             ShellStatus = SHELL_NOT_FOUND;
 137           } else {
 138             Drive = GetFullyQualifiedPath(Directory);
 139             while (PathRemoveLastItem(Drive)) ;
 140           }
 141           if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 142             //
 143             // change directory on current drive letter
 144             //
 145             Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 146             if (Status == EFI_NOT_FOUND) {
 147               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle);
 148               ShellStatus = SHELL_NOT_FOUND;
 149             }
 150           }
 151         } else if (StrStr(Param1Copy, L":") == NULL) {
 152           if (ShellGetCurrentDir(NULL) == NULL) {
 153             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle);
 154             ShellStatus = SHELL_NOT_FOUND;
 155           } else {
 156             ASSERT((Drive == NULL && DriveSize == 0) || (Drive != NULL));
 157             Drive = StrnCatGrow(&Drive, &DriveSize, ShellGetCurrentDir(NULL), 0);
 158             if (*Param1Copy == L'\\') {
 159               while (PathRemoveLastItem(Drive)) ;
 160               Drive = StrnCatGrow(&Drive, &DriveSize, Param1Copy+1, 0);
 161             } else {
 162               Drive = StrnCatGrow(&Drive, &DriveSize, Param1Copy, 0);
 163             }
 164             //
 165             // Verify that this is a valid directory
 166             //
 167             Status = gEfiShellProtocol->OpenFileByName(Drive, &Handle, EFI_FILE_MODE_READ);
 168             if (EFI_ERROR(Status)) {
 169               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_DIR_NF), gShellLevel2HiiHandle, Drive);
 170               ShellStatus = SHELL_NOT_FOUND;
 171             } else if (EFI_ERROR(FileHandleIsDirectory(Handle))) {
 172               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NOT_DIR), gShellLevel2HiiHandle, Drive);
 173               ShellStatus = SHELL_NOT_FOUND;
 174             }
 175             if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 176               //
 177               // change directory on current drive letter
 178               //
 179               Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 180               if (Status == EFI_NOT_FOUND) {
 181                 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle);
 182                 ShellStatus = SHELL_NOT_FOUND;
 183               }
 184             }
 185             if (Handle != NULL) {
 186               gEfiShellProtocol->CloseFile(Handle);
 187               DEBUG_CODE(Handle = NULL;);
 188             }
 189           }
 190         } else {
 191           //
 192           // change directory on other drive letter
 193           //
 194           Drive = AllocateZeroPool(StrSize(Param1Copy));
 195           if (Drive == NULL) {
 196             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_MEM), gShellLevel2HiiHandle);
 197             ShellStatus = SHELL_OUT_OF_RESOURCES;
 198           } else {
 199             Drive = StrCpy(Drive, Param1Copy);
 200             Path = StrStr(Drive, L":");
 201             ASSERT(Path != NULL);
 202             if (*(Path+1) == CHAR_NULL) {
 203               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle);
 204               ShellStatus = SHELL_NOT_FOUND;
 205             } else {
 206               *(Path+1) = CHAR_NULL;
 207               if (Path == Drive + StrLen(Drive)) {
 208                 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle);
 209                 ShellStatus = SHELL_NOT_FOUND;
 210               } else {
 211                 Status = gEfiShellProtocol->SetCurDir(Drive, Path+2);
 212                 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_PRINT), gShellLevel2HiiHandle, ShellGetCurrentDir(Drive));
 213               }
 214             }
 215             if (Status == EFI_NOT_FOUND) {
 216               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle);
 217               Status = SHELL_NOT_FOUND;
 218             } else if (EFI_ERROR(Status)) {
 219               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_DIR_NF), gShellLevel2HiiHandle, Param1Copy);
 220               Status = SHELL_NOT_FOUND;
 221             }
 222           }
 223         }
 224       }
 225       FreePool(Param1Copy);
 226     }
 227   }
 228
 229   if (Drive != NULL) {
 230     FreePool(Drive);
 231   }
 232   //
 233   // free the command line package
 234   //
 235   ShellCommandLineFreeVarList (Package);
 236
 237   //
 238   // return the status
 239   //
 240   return (ShellStatus);
 241 }
 242