ShellPkg/Library/UefiShellLevel2CommandsLib/Cd.c

   1 /** @file
   2   Main file for attrib shell level 2 function.
   3
   4   (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
   5   (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
   6   Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
   7   This program and the accompanying materials
   8   are licensed and made available under the terms and conditions of the BSD License
   9   which accompanies this distribution.  The full text of the license may be found at
  10   http://opensource.org/licenses/bsd-license.php
  11
  12   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14
  15 **/
  16
  17 #include "UefiShellLevel2CommandsLib.h"
  18
  19 /**
  20   Function for 'cd' command.
  21
  22   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  23   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  24 **/
  25 SHELL_STATUS
  26 EFIAPI
  27 ShellCommandRunCd (
  28   IN EFI_HANDLE        ImageHandle,
  29   IN EFI_SYSTEM_TABLE  *SystemTable
  30   )
  31 {
  32   EFI_STATUS        Status;
  33   LIST_ENTRY        *Package;
  34   CONST CHAR16      *Directory;
  35   CHAR16            *Cwd;
  36   CHAR16            *Path;
  37   CHAR16            *Drive;
  38   UINTN             CwdSize;
  39   UINTN             DriveSize;
  40   CHAR16            *ProblemParam;
  41   SHELL_STATUS      ShellStatus;
  42   SHELL_FILE_HANDLE Handle;
  43   CONST CHAR16      *Param1;
  44   CHAR16            *Param1Copy;
  45   CHAR16*           Walker;
  46
  47   ProblemParam = NULL;
  48   ShellStatus = SHELL_SUCCESS;
  49   Drive = NULL;
  50   DriveSize = 0;
  51
  52   Status = CommandInit();
  53   ASSERT_EFI_ERROR(Status);
  54
  55   //
  56   // initialize the shell lib (we must be in non-auto-init...)
  57   //
  58   Status = ShellInitialize();
  59   ASSERT_EFI_ERROR(Status);
  60
  61   //
  62   // parse the command line
  63   //
  64   Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
  65   if (EFI_ERROR(Status)) {
  66     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  67       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, L"cd", ProblemParam);
  68       FreePool(ProblemParam);
  69       ShellStatus = SHELL_INVALID_PARAMETER;
  70     } else {
  71       ASSERT(FALSE);
  72     }
  73   }
  74
  75   //
  76   // check for "-?"
  77   //
  78   if (ShellCommandLineGetFlag(Package, L"-?")) {
  79     ASSERT(FALSE);
  80   } else if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
  81     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"cd");
  82     ShellStatus = SHELL_INVALID_PARAMETER;
  83   } else {
  84     //
  85     // remember that param 0 is the command name
  86     // If there are 0 value parameters, then print the current directory
  87     // else If there are 2 value parameters, then print the error message
  88     // else If there is  1 value paramerer , then change the directory
  89     //
  90     Param1 = ShellCommandLineGetRawValue(Package, 1);
  91     if (Param1 == NULL) {
  92       //
  93       // display the current directory
  94       //
  95       Directory = ShellGetCurrentDir(NULL);
  96       if (Directory != NULL) {
  97         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_PRINT), gShellLevel2HiiHandle, Directory);
  98       } else {
  99         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle, L"cd");
 100         ShellStatus = SHELL_NOT_FOUND;
 101       }
 102     } else {
 103       Param1Copy = CatSPrint(NULL, L"%s", Param1, NULL);
 104       for (Walker = Param1Copy; Walker != NULL && *Walker != CHAR_NULL ; Walker++) {
 105         if (*Walker == L'\"') {
 106           CopyMem(Walker, Walker+1, StrSize(Walker) - sizeof(Walker[0]));
 107         }
 108       }
 109
 110       if (Param1Copy != NULL) {
 111         Param1Copy = PathCleanUpDirectories(Param1Copy);
 112       }
 113       if (Param1Copy != NULL) {
 114         if (StrCmp(Param1Copy, L".") == 0) {
 115           //
 116           // nothing to do... change to current directory
 117           //
 118         } else if (StrCmp(Param1Copy, L"..") == 0) {
 119           //
 120           // Change up one directory...
 121           //
 122           Directory = ShellGetCurrentDir(NULL);
 123           if (Directory == NULL) {
 124             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle, L"cd");
 125             ShellStatus = SHELL_NOT_FOUND;
 126           } else {
 127             CwdSize = StrSize(Directory) + sizeof(CHAR16);
 128             Cwd = AllocateZeroPool(CwdSize);
 129             if (Cwd == NULL) {
 130               ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_OUT_MEM), gShellLevel2HiiHandle, L"cd");
 131               ShellStatus = SHELL_OUT_OF_RESOURCES;
 132             } else {
 133               StrCpyS (Cwd, StrSize (Directory) / sizeof (CHAR16) + 1, Directory);
 134               StrCatS (Cwd, StrSize (Directory) / sizeof (CHAR16) + 1, L"\\");
 135               Drive = GetFullyQualifiedPath (Cwd);
 136               PathRemoveLastItem (Drive);
 137               FreePool (Cwd);
 138             }
 139           }
 140           if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 141             //
 142             // change directory on current drive letter
 143             //
 144             Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 145             if (Status == EFI_NOT_FOUND) {
 146               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 147               ShellStatus = SHELL_NOT_FOUND;
 148             }
 149           }
 150         } else if (StrCmp(Param1Copy, L"\\") == 0) {
 151           //
 152           // Move to root of current drive
 153           //
 154           Directory = ShellGetCurrentDir(NULL);
 155           if (Directory == NULL) {
 156             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle, L"cd");
 157             ShellStatus = SHELL_NOT_FOUND;
 158           } else {
 159             CwdSize = StrSize(Directory) + sizeof(CHAR16);
 160             Cwd = AllocateZeroPool(CwdSize);
 161             if (Cwd == NULL) {
 162               ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_OUT_MEM), gShellLevel2HiiHandle, L"cd");
 163               ShellStatus = SHELL_OUT_OF_RESOURCES;
 164             } else {
 165               StrCpyS (Cwd, StrSize (Directory) / sizeof (CHAR16) + 1, Directory);
 166               StrCatS (Cwd, StrSize (Directory) / sizeof (CHAR16) + 1, L"\\");
 167               Drive = GetFullyQualifiedPath (Cwd);
 168               while (PathRemoveLastItem (Drive)) {
 169                 //
 170                 // Check if Drive contains 'fsx:\' only or still points to a sub-directory.
 171                 // Don't remove trailing '\' from Drive if it points to the root directory.
 172                 //
 173                 Path = StrStr (Drive, L":\\");
 174                 if ((Path != NULL) && (*(Path + 2) == CHAR_NULL)) {
 175                   break;
 176                 }
 177               }
 178               FreePool (Cwd);
 179             }
 180           }
 181           if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 182             //
 183             // change directory on current drive letter
 184             //
 185             Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 186             if (Status == EFI_NOT_FOUND) {
 187               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 188               ShellStatus = SHELL_NOT_FOUND;
 189             }
 190           }
 191         } else if (StrStr(Param1Copy, L":") == NULL) {
 192           //
 193           // change directory without a drive identifier
 194           //
 195           if (ShellGetCurrentDir(NULL) == NULL) {
 196             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle, L"cd");
 197             ShellStatus = SHELL_NOT_FOUND;
 198           } else {
 199             ASSERT((Drive == NULL && DriveSize == 0) || (Drive != NULL));
 200             Drive = StrnCatGrow(&Drive, &DriveSize, ShellGetCurrentDir(NULL), 0);
 201             Drive = StrnCatGrow(&Drive, &DriveSize, L"\\", 0);
 202             if (*Param1Copy == L'\\') {
 203               while (PathRemoveLastItem(Drive)) ;
 204               Drive = StrnCatGrow(&Drive, &DriveSize, Param1Copy+1, 0);
 205             } else {
 206               Drive = StrnCatGrow(&Drive, &DriveSize, Param1Copy, 0);
 207             }
 208             //
 209             // Verify that this is a valid directory
 210             //
 211             Status = gEfiShellProtocol->OpenFileByName(Drive, &Handle, EFI_FILE_MODE_READ);
 212             if (EFI_ERROR(Status)) {
 213               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_DIR_NF), gShellLevel2HiiHandle, L"cd", Drive);
 214               ShellStatus = SHELL_NOT_FOUND;
 215             } else if (EFI_ERROR(FileHandleIsDirectory(Handle))) {
 216               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NOT_DIR), gShellLevel2HiiHandle, L"cd", Drive);
 217               ShellStatus = SHELL_NOT_FOUND;
 218             }
 219             if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 220               //
 221               // change directory on current drive letter
 222               //
 223               Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 224               if (Status == EFI_NOT_FOUND) {
 225                 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 226                 ShellStatus = SHELL_NOT_FOUND;
 227               }
 228             }
 229             if (Handle != NULL) {
 230               gEfiShellProtocol->CloseFile(Handle);
 231               DEBUG_CODE(Handle = NULL;);
 232             }
 233           }
 234         } else {
 235           //
 236           // change directory with a drive letter
 237           //
 238           Drive = AllocateCopyPool(StrSize(Param1Copy), Param1Copy);
 239           if (Drive == NULL) {
 240             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_MEM), gShellLevel2HiiHandle, L"cd");
 241             ShellStatus = SHELL_OUT_OF_RESOURCES;
 242           } else {
 243             Path = StrStr(Drive, L":");
 244             ASSERT(Path != NULL);
 245             if (EFI_ERROR(ShellIsDirectory(Param1Copy))) {
 246               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NOT_DIR), gShellLevel2HiiHandle, L"cd", Param1Copy);
 247               ShellStatus = SHELL_NOT_FOUND;
 248             } else if (*(Path+1) == CHAR_NULL) {
 249               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 250               ShellStatus = SHELL_NOT_FOUND;
 251             } else {
 252               *(Path+1) = CHAR_NULL;
 253               if (Path == Drive + StrLen(Drive)) {
 254                 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 255                 ShellStatus = SHELL_NOT_FOUND;
 256               } else {
 257                 Status = gEfiShellProtocol->SetCurDir(Drive, Path+2);
 258                 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_PRINT), gShellLevel2HiiHandle, ShellGetCurrentDir(Drive));
 259               }
 260             }
 261             if (Status == EFI_NOT_FOUND) {
 262               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle, L"cd");
 263               Status = SHELL_NOT_FOUND;
 264             } else if (EFI_ERROR(Status)) {
 265               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_DIR_NF), gShellLevel2HiiHandle, L"cd", Param1Copy);
 266               Status = SHELL_NOT_FOUND;
 267             }
 268           }
 269         }
 270       }
 271       FreePool(Param1Copy);
 272     }
 273   }
 274
 275   if (Drive != NULL) {
 276     FreePool(Drive);
 277   }
 278   //
 279   // free the command line package
 280   //
 281   ShellCommandLineFreeVarList (Package);
 282
 283   //
 284   // return the status
 285   //
 286   return (ShellStatus);
 287 }
 288