ShellPkg/Library/UefiShellLevel2CommandsLib/Cd.c

   1 /** @file
   2   Main file for attrib shell level 2 function.
   3
   4   Copyright (c) 2009 - 2010, 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
  41   ProblemParam = NULL;
  42   ShellStatus = SHELL_SUCCESS;
  43   Drive = NULL;
  44   DriveSize = 0;
  45
  46   Status = CommandInit();
  47   ASSERT_EFI_ERROR(Status);
  48
  49   //
  50   // initialize the shell lib (we must be in non-auto-init...)
  51   //
  52   Status = ShellInitialize();
  53   ASSERT_EFI_ERROR(Status);
  54
  55   //
  56   // parse the command line
  57   //
  58   Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
  59   if (EFI_ERROR(Status)) {
  60     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  61       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, ProblemParam);
  62       FreePool(ProblemParam);
  63       ShellStatus = SHELL_INVALID_PARAMETER;
  64     } else {
  65       ASSERT(FALSE);
  66     }
  67   }
  68
  69   //
  70   // check for "-?"
  71   //
  72   if (ShellCommandLineGetFlag(Package, L"-?")) {
  73     ASSERT(FALSE);
  74   } else if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
  75     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle);
  76     ShellStatus = SHELL_INVALID_PARAMETER;
  77   } else {
  78     //
  79     // remember that param 0 is the command name
  80     // If there are 0 value parameters, then print the current directory
  81     // else If there are 2 value parameters, then print the error message
  82     // else If there is  1 value paramerer , then change the directory
  83     //
  84     Param1 = ShellCommandLineGetRawValue(Package, 1);
  85     if (Param1 == NULL) {
  86       //
  87       // display the current directory
  88       //
  89       Directory = ShellGetCurrentDir(NULL);
  90       if (Directory != NULL) {
  91         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_PRINT), gShellLevel2HiiHandle, Directory);
  92       } else {
  93         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle);
  94         ShellStatus = SHELL_NOT_FOUND;
  95       }
  96     } else {
  97       if (StrCmp(Param1, L".") == 0) {
  98         //
  99         // nothing to do... change to current directory
 100         //
 101       } else if (StrCmp(Param1, L"..") == 0) {
 102         //
 103         // Change up one directory...
 104         //
 105         Directory = ShellGetCurrentDir(NULL);
 106         if (Directory == NULL) {
 107           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle);
 108           ShellStatus = SHELL_NOT_FOUND;
 109         } else {
 110           Drive = GetFullyQualifiedPath(Directory);
 111           ChopLastSlash(Drive);
 112         }
 113         if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 114           //
 115           // change directory on current drive letter
 116           //
 117           Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 118           if (Status == EFI_NOT_FOUND) {
 119             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle);
 120             ShellStatus = SHELL_NOT_FOUND;
 121           }
 122         }
 123       } else if (StrCmp(Param1, L"\\") == 0) {
 124         //
 125         // Move to root of current drive
 126         //
 127         Directory = ShellGetCurrentDir(NULL);
 128         if (Directory == NULL) {
 129           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle);
 130           ShellStatus = SHELL_NOT_FOUND;
 131         } else {
 132           Drive = GetFullyQualifiedPath(Directory);
 133           while (ChopLastSlash(Drive)) ;
 134         }
 135         if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 136           //
 137           // change directory on current drive letter
 138           //
 139           Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 140           if (Status == EFI_NOT_FOUND) {
 141             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle);
 142             ShellStatus = SHELL_NOT_FOUND;
 143           }
 144         }
 145       } else if (StrStr(Param1, L":") == NULL) {
 146         if (ShellGetCurrentDir(NULL) == NULL) {
 147           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_CWD), gShellLevel2HiiHandle);
 148           ShellStatus = SHELL_NOT_FOUND;
 149         } else {
 150           ASSERT((Drive == NULL && DriveSize == 0) || (Drive != NULL));
 151           Drive = StrnCatGrow(&Drive, &DriveSize, ShellGetCurrentDir(NULL), 0);
 152           if (*Param1 == L'\\') {
 153             while (ChopLastSlash(Drive)) ;
 154             Drive = StrnCatGrow(&Drive, &DriveSize, Param1+1, 0);
 155           } else {
 156             Drive = StrnCatGrow(&Drive, &DriveSize, Param1, 0);
 157           }
 158           //
 159           // Verify that this is a valid directory
 160           //
 161           Status = gEfiShellProtocol->OpenFileByName(Drive, &Handle, EFI_FILE_MODE_READ);
 162           if (EFI_ERROR(Status)) {
 163             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_DIR_NF), gShellLevel2HiiHandle, Drive);
 164             ShellStatus = SHELL_NOT_FOUND;
 165           } else if (EFI_ERROR(FileHandleIsDirectory(Handle))) {
 166             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NOT_DIR), gShellLevel2HiiHandle, Drive);
 167             ShellStatus = SHELL_NOT_FOUND;
 168           }
 169           if (ShellStatus == SHELL_SUCCESS && Drive != NULL) {
 170             //
 171             // change directory on current drive letter
 172             //
 173             Status = gEfiShellProtocol->SetCurDir(NULL, Drive);
 174             if (Status == EFI_NOT_FOUND) {
 175               ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle);
 176               ShellStatus = SHELL_NOT_FOUND;
 177             }
 178           }
 179           if (Handle != NULL) {
 180             gEfiShellProtocol->CloseFile(Handle);
 181             DEBUG_CODE(Handle = NULL;);
 182           }
 183         }
 184       } else {
 185         //
 186         // change directory on other drive letter
 187         //
 188         Drive = AllocateZeroPool(StrSize(Param1));
 189         Drive = StrCpy(Drive, Param1);
 190         Path = StrStr(Drive, L":");
 191         *(++Path) = CHAR_NULL;
 192         Status = gEfiShellProtocol->SetCurDir(Drive, ++Path);
 193
 194         if (Status == EFI_NOT_FOUND) {
 195           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_CD_NF), gShellLevel2HiiHandle);
 196           Status = SHELL_NOT_FOUND;
 197         } else if (EFI_ERROR(Status)) {
 198           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_DIR_NF), gShellLevel2HiiHandle, Param1);
 199           Status = SHELL_NOT_FOUND;
 200         }
 201       }
 202     }
 203   }
 204
 205   if (Drive != NULL) {
 206     FreePool(Drive);
 207   }
 208   //
 209   // free the command line package
 210   //
 211   ShellCommandLineFreeVarList (Package);
 212
 213   //
 214   // return the status
 215   //
 216   return (ShellStatus);
 217 }
 218