ShellPkg/Library/UefiShellLevel2CommandsLib/Rm.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 STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
  18   {L"-q", TypeFlag},
  19   {NULL, TypeMax}
  20   };
  21
  22 /**
  23   Determine if a directory has no files in it.
  24
  25   @param[in] FileHandle   The EFI_HANDLE to the directory.
  26
  27   @retval TRUE  The directory has no files (or directories).
  28   @retval FALSE The directory has at least 1 file or directory in it.
  29 **/
  30 BOOLEAN
  31 EFIAPI
  32 IsDirectoryEmpty (
  33   IN EFI_HANDLE   FileHandle
  34   )
  35 {
  36   EFI_STATUS      Status;
  37   EFI_FILE_INFO   *FileInfo;
  38   BOOLEAN         NoFile;
  39   BOOLEAN         RetVal;
  40
  41   RetVal = TRUE;
  42   NoFile = FALSE;
  43
  44   for (Status = FileHandleFindFirstFile(FileHandle, &FileInfo)
  45     ;  !NoFile
  46     ;  Status = FileHandleFindNextFile(FileHandle, FileInfo, &NoFile)
  47    ){
  48     if (StrStr(FileInfo->FileName, L".") != FileInfo->FileName
  49       &&StrStr(FileInfo->FileName, L"..") != FileInfo->FileName) {
  50       RetVal = FALSE;
  51     }
  52   }
  53   return (RetVal);
  54 }
  55
  56 /**
  57   Delete a node and all nodes under it (including sub directories).
  58
  59   @param[in] Node   The node to start deleting with.
  60   @param[in] Quiet  TRUE to print no messages.
  61
  62   @retval SHELL_SUCCESS       The operation was successful.
  63   @retval SHELL_ACCESS_DENIED A file was read only.
  64   @retval SHELL_ABORTED       The abort message was received.
  65   @retval SHELL_DEVICE_ERROR  A device error occured reading this Node.
  66 **/
  67 SHELL_STATUS
  68 EFIAPI
  69 CascadeDelete(
  70   IN EFI_SHELL_FILE_INFO  *Node,
  71   IN CONST BOOLEAN        Quiet
  72   )
  73 {
  74   SHELL_STATUS          ShellStatus;
  75   EFI_SHELL_FILE_INFO   *List;
  76   EFI_SHELL_FILE_INFO   *Node2;
  77   EFI_STATUS            Status;
  78   SHELL_PROMPT_RESPONSE *Resp;
  79
  80   Resp                  = NULL;
  81   ShellStatus           = SHELL_SUCCESS;
  82   List                  = NULL;
  83   Status                = EFI_SUCCESS;
  84
  85   if ((Node->Info->Attribute & EFI_FILE_READ_ONLY) == EFI_FILE_READ_ONLY) {
  86     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DETELE_RO), gShellLevel2HiiHandle, Node->FullName);
  87     return (SHELL_ACCESS_DENIED);
  88   }
  89
  90   if ((Node->Info->Attribute & EFI_FILE_DIRECTORY) == EFI_FILE_DIRECTORY) {
  91     if (!IsDirectoryEmpty(Node->Handle)) {
  92       if (!Quiet) {
  93         Status = ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN(STR_RM_LOG_DELETE_CONF), gShellLevel2HiiHandle, Node->FullName);
  94         Status = ShellPromptForResponse(ShellPromptResponseTypeYesNo, NULL, (VOID**)&Resp);
  95         ASSERT_EFI_ERROR(Status);
  96         ASSERT(Resp != NULL);
  97         if (EFI_ERROR(Status) || *Resp != ShellPromptResponseYes) {
  98           SHELL_FREE_NON_NULL(Resp);
  99           return (SHELL_ABORTED);
 100         }
 101         SHELL_FREE_NON_NULL(Resp);
 102       }
 103       //
 104       // empty out the directory
 105       //
 106       Status = gEfiShellProtocol->FindFilesInDir(Node->Handle, &List);
 107       if (EFI_ERROR(Status)) {
 108         if (List!=NULL) {
 109           gEfiShellProtocol->FreeFileList(&List);
 110         }
 111         return (SHELL_DEVICE_ERROR);
 112       }
 113       for (Node2 = (EFI_SHELL_FILE_INFO   *)GetFirstNode(&List->Link)
 114         ;  !IsNull(&List->Link, &Node2->Link)
 115         ;  Node2 = (EFI_SHELL_FILE_INFO   *)GetNextNode(&List->Link, &Node2->Link)
 116        ){
 117         //
 118         // skip the directory traversing stuff...
 119         //
 120         if (StrCmp(Node2->FileName, L".") == 0 || StrCmp(Node2->FileName, L"..") == 0) {
 121           continue;
 122         }
 123         Node2->Status = gEfiShellProtocol->OpenFileByName (Node2->FullName, &Node2->Handle, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE);
 124         ShellStatus = CascadeDelete(Node2, Quiet);
 125         if (ShellStatus != SHELL_SUCCESS) {
 126           if (List!=NULL) {
 127             gEfiShellProtocol->FreeFileList(&List);
 128           }
 129           return (ShellStatus);
 130         }
 131       }
 132       if (List!=NULL) {
 133         gEfiShellProtocol->FreeFileList(&List);
 134       }
 135     }
 136   }
 137
 138   if (!(StrCmp(Node->FileName, L".") == 0 || StrCmp(Node->FileName, L"..") == 0)) {
 139     //
 140     // now delete the current node...
 141     //
 142     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DELETE), gShellLevel2HiiHandle, Node->FullName);
 143     Status = gEfiShellProtocol->DeleteFile(Node->Handle);
 144     Node->Handle = NULL;
 145   }
 146
 147   //
 148   // We cant allow for the warning here! (Dont use EFI_ERROR Macro).
 149   //
 150   if (Status != EFI_SUCCESS){
 151     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DELETE_ERR), gShellLevel2HiiHandle, Status);
 152     return (SHELL_ACCESS_DENIED);
 153   } else {
 154     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DELETE_COMP), gShellLevel2HiiHandle);
 155     return (SHELL_SUCCESS);
 156   }
 157 }
 158
 159 /**
 160   Determins if a Node is a valid delete target.  Will prevent deleting the root directory.
 161
 162   @param[in] List       RESERVED.  Not used.
 163   @param[in] Node       The node to analyze.
 164   @param[in] Package    RESERVED.  Not used.
 165 **/
 166 BOOLEAN
 167 EFIAPI
 168 IsValidDeleteTarget(
 169   IN CONST EFI_SHELL_FILE_INFO  *List,
 170   IN CONST EFI_SHELL_FILE_INFO  *Node,
 171   IN CONST LIST_ENTRY           *Package
 172   )
 173 {
 174   CONST CHAR16        *TempLocation;
 175   CHAR16              *Temp2;
 176   UINTN               Size;
 177
 178   TempLocation = StrStr(Node->FullName, L":");
 179   if (StrLen(TempLocation) == 2) {
 180     //
 181     // Deleting the root directory is invalid.
 182     //
 183     return (FALSE);
 184   }
 185   TempLocation = ShellGetCurrentDir(NULL);
 186   Size = 0;
 187   Temp2 = NULL;
 188   StrnCatGrow(&Temp2, &Size, TempLocation, 0);
 189   if (StrStr(Temp2, Node->FullName) != NULL) {
 190     FreePool(Temp2);
 191     return (FALSE);
 192   }
 193   FreePool(Temp2);
 194
 195   return (TRUE);
 196 }
 197
 198 /**
 199   Function for 'rm' command.
 200
 201   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
 202   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
 203 **/
 204 SHELL_STATUS
 205 EFIAPI
 206 ShellCommandRunRm (
 207   IN EFI_HANDLE        ImageHandle,
 208   IN EFI_SYSTEM_TABLE  *SystemTable
 209   )
 210 {
 211   EFI_STATUS            Status;
 212   LIST_ENTRY            *Package;
 213   CHAR16                *ProblemParam;
 214   CONST CHAR16          *Param;
 215   SHELL_STATUS          ShellStatus;
 216   UINTN                 ParamCount;
 217   EFI_SHELL_FILE_INFO   *FileList;
 218   EFI_SHELL_FILE_INFO   *Node;
 219
 220   ProblemParam        = NULL;
 221   ShellStatus         = SHELL_SUCCESS;
 222   ParamCount          = 0;
 223   FileList            = NULL;
 224
 225   //
 226   // initialize the shell lib (we must be in non-auto-init...)
 227   //
 228   Status = ShellInitialize();
 229   ASSERT_EFI_ERROR(Status);
 230
 231   //
 232   // parse the command line
 233   //
 234   Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
 235   if (EFI_ERROR(Status)) {
 236     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
 237       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, ProblemParam);
 238       FreePool(ProblemParam);
 239       ShellStatus = SHELL_INVALID_PARAMETER;
 240     } else {
 241       ASSERT(FALSE);
 242     }
 243   } else {
 244     //
 245     // check for "-?"
 246     //
 247     if (ShellCommandLineGetFlag(Package, L"-?")) {
 248       ASSERT(FALSE);
 249     }
 250     if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
 251       //
 252       // we insufficient parameters
 253       //
 254       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel2HiiHandle);
 255       ShellStatus = SHELL_INVALID_PARAMETER;
 256     } else {
 257       //
 258       // get a list with each file specified by parameters
 259       // if parameter is a directory then add all the files below it to the list
 260       //
 261       for ( ParamCount = 1, Param = ShellCommandLineGetRawValue(Package, ParamCount)
 262           ; Param != NULL
 263           ; ParamCount++, Param = ShellCommandLineGetRawValue(Package, ParamCount)
 264          ){
 265         Status = ShellOpenFileMetaArg((CHAR16*)Param, EFI_FILE_MODE_WRITE|EFI_FILE_MODE_READ, &FileList);
 266         if (EFI_ERROR(Status) || FileList == NULL || IsListEmpty(&FileList->Link)) {
 267           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_NF), gShellLevel2HiiHandle, (CHAR16*)Param);
 268           ShellStatus = SHELL_NOT_FOUND;
 269           break;
 270         }
 271       }
 272
 273       if (ShellStatus == SHELL_SUCCESS){
 274         //
 275         // loop through the list and make sure we are not aborting...
 276         //
 277         for ( Node = (EFI_SHELL_FILE_INFO*)GetFirstNode(&FileList->Link)
 278             ; !IsNull(&FileList->Link, &Node->Link) && !ShellGetExecutionBreakFlag()
 279             ; Node = (EFI_SHELL_FILE_INFO*)GetNextNode(&FileList->Link, &Node->Link)
 280            ){
 281           //
 282           // skip the directory traversing stuff...
 283           //
 284           if (StrCmp(Node->FileName, L".") == 0 || StrCmp(Node->FileName, L"..") == 0) {
 285             continue;
 286           }
 287
 288           //
 289           // do the deleting of nodes
 290           //
 291           if (EFI_ERROR(Node->Status)){
 292             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DELETE_ERR2), gShellLevel2HiiHandle, Node->Status);
 293             ShellStatus = SHELL_ACCESS_DENIED;
 294             break;
 295           }
 296           if (!IsValidDeleteTarget(FileList, Node, Package)) {
 297             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DELETE_ERR3), gShellLevel2HiiHandle, Node->FullName);
 298             ShellStatus = SHELL_INVALID_PARAMETER;
 299             break;
 300           }
 301
 302           ShellStatus = CascadeDelete(Node, ShellCommandLineGetFlag(Package, L"-q"));
 303         }
 304       }
 305       //
 306       // Free the fileList
 307       //
 308       if (FileList != NULL) {
 309         Status = ShellCloseFileMetaArg(&FileList);
 310       }
 311       FileList = NULL;
 312     }
 313
 314     //
 315     // free the command line package
 316     //
 317     ShellCommandLineFreeVarList (Package);
 318   }
 319
 320   return (ShellStatus);
 321 }
 322