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audk/ShellPkg/Library/UefiShellLevel2CommandsLib/Rm.c

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/** @file
Main file for attrib shell level 2 function.
(C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "UefiShellLevel2CommandsLib.h"
STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
{L"-q", TypeFlag},
{NULL, TypeMax}
};
/**
Determine if a directory has no files in it.
@param[in] FileHandle The EFI_HANDLE to the directory.
@retval TRUE The directory has no files (or directories).
@retval FALSE The directory has at least 1 file or directory in it.
**/
BOOLEAN
EFIAPI
IsDirectoryEmpty (
IN EFI_HANDLE FileHandle
)
{
EFI_FILE_INFO *FileInfo;
BOOLEAN NoFile;
BOOLEAN RetVal;
RetVal = TRUE;
NoFile = FALSE;
FileInfo = NULL;
for (FileHandleFindFirstFile(FileHandle, &FileInfo)
; !NoFile
; FileHandleFindNextFile(FileHandle, FileInfo, &NoFile)
){
if (StrStr(FileInfo->FileName, L".") != FileInfo->FileName
&&StrStr(FileInfo->FileName, L"..") != FileInfo->FileName) {
RetVal = FALSE;
}
}
return (RetVal);
}
/**
Delete a node and all nodes under it (including sub directories).
@param[in] Node The node to start deleting with.
@param[in] Quiet TRUE to print no messages.
@retval SHELL_SUCCESS The operation was successful.
@retval SHELL_ACCESS_DENIED A file was read only.
@retval SHELL_ABORTED The abort message was received.
@retval SHELL_DEVICE_ERROR A device error occured reading this Node.
**/
SHELL_STATUS
EFIAPI
CascadeDelete(
IN EFI_SHELL_FILE_INFO *Node,
IN CONST BOOLEAN Quiet
)
{
SHELL_STATUS ShellStatus;
EFI_SHELL_FILE_INFO *List;
EFI_SHELL_FILE_INFO *Node2;
EFI_STATUS Status;
SHELL_PROMPT_RESPONSE *Resp;
CHAR16 *TempName;
UINTN NewSize;
Resp = NULL;
ShellStatus = SHELL_SUCCESS;
List = NULL;
Status = EFI_SUCCESS;
if ((Node->Info->Attribute & EFI_FILE_READ_ONLY) == EFI_FILE_READ_ONLY) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DETELE_RO), gShellLevel2HiiHandle, L"rm", Node->FullName);
return (SHELL_ACCESS_DENIED);
}
if ((Node->Info->Attribute & EFI_FILE_DIRECTORY) == EFI_FILE_DIRECTORY) {
if (!IsDirectoryEmpty(Node->Handle)) {
if (!Quiet) {
Status = ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN(STR_RM_LOG_DELETE_CONF), gShellLevel2HiiHandle, Node->FullName);
Status = ShellPromptForResponse(ShellPromptResponseTypeYesNo, NULL, (VOID**)&Resp);
ASSERT(Resp != NULL);
if (EFI_ERROR(Status) || *Resp != ShellPromptResponseYes) {
SHELL_FREE_NON_NULL(Resp);
return (SHELL_ABORTED);
}
SHELL_FREE_NON_NULL(Resp);
}
//
// empty out the directory
//
Status = gEfiShellProtocol->FindFilesInDir(Node->Handle, &List);
if (EFI_ERROR(Status)) {
if (List!=NULL) {
gEfiShellProtocol->FreeFileList(&List);
}
return (SHELL_DEVICE_ERROR);
}
for (Node2 = (EFI_SHELL_FILE_INFO *)GetFirstNode(&List->Link)
; !IsNull(&List->Link, &Node2->Link)
; Node2 = (EFI_SHELL_FILE_INFO *)GetNextNode(&List->Link, &Node2->Link)
){
//
// skip the directory traversing stuff...
//
if (StrCmp(Node2->FileName, L".") == 0 || StrCmp(Node2->FileName, L"..") == 0) {
continue;
}
Node2->Status = gEfiShellProtocol->OpenFileByName (Node2->FullName, &Node2->Handle, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE);
if (EFI_ERROR(Node2->Status) && StrStr(Node2->FileName, L":") == NULL) {
//
// Update the node filename to have full path with file system identifier
//
NewSize = StrSize(Node->FullName) + StrSize(Node2->FullName);
TempName = AllocateZeroPool(NewSize);
if (TempName == NULL) {
ShellStatus = SHELL_OUT_OF_RESOURCES;
} else {
StrCpyS(TempName, NewSize/sizeof(CHAR16), Node->FullName);
TempName[StrStr(TempName, L":")+1-TempName] = CHAR_NULL;
StrCatS(TempName, NewSize/sizeof(CHAR16), Node2->FullName);
FreePool((VOID*)Node2->FullName);
Node2->FullName = TempName;
//
// Now try again to open the file
//
Node2->Status = gEfiShellProtocol->OpenFileByName (Node2->FullName, &Node2->Handle, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE);
}
}
if (!EFI_ERROR(Node2->Status)) {
ShellStatus = CascadeDelete(Node2, Quiet);
} else if (ShellStatus == SHELL_SUCCESS) {
ShellStatus = (SHELL_STATUS)(Node2->Status&(~0x80000000));
}
if (ShellStatus != SHELL_SUCCESS) {
if (List!=NULL) {
gEfiShellProtocol->FreeFileList(&List);
}
return (ShellStatus);
}
}
if (List!=NULL) {
gEfiShellProtocol->FreeFileList(&List);
}
}
}
if (!(StrCmp(Node->FileName, L".") == 0 || StrCmp(Node->FileName, L"..") == 0)) {
//
// now delete the current node...
//
if (!Quiet) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DELETE), gShellLevel2HiiHandle, Node->FullName);
}
Status = gEfiShellProtocol->DeleteFile(Node->Handle);
Node->Handle = NULL;
}
//
// We cant allow for the warning here! (Dont use EFI_ERROR Macro).
//
if (Status != EFI_SUCCESS){
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DELETE_ERR), gShellLevel2HiiHandle, Status);
return (SHELL_ACCESS_DENIED);
} else {
if (!Quiet) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DELETE_COMP), gShellLevel2HiiHandle);
}
return (SHELL_SUCCESS);
}
}
/**
Determines if a Node is a valid delete target. Will prevent deleting the root directory.
@param[in] List RESERVED. Not used.
@param[in] Node The node to analyze.
@param[in] Package RESERVED. Not used.
**/
BOOLEAN
EFIAPI
IsValidDeleteTarget(
IN CONST EFI_SHELL_FILE_INFO *List,
IN CONST EFI_SHELL_FILE_INFO *Node,
IN CONST LIST_ENTRY *Package
)
{
CONST CHAR16 *TempLocation;
BOOLEAN RetVal;
CHAR16 *SearchString;
CHAR16 *Pattern;
UINTN Size;
if (Node == NULL || Node->FullName == NULL) {
return (FALSE);
}
TempLocation = StrStr(Node->FullName, L":");
if (StrLen(TempLocation) <= 2) {
//
// Deleting the root directory is invalid.
//
return (FALSE);
}
TempLocation = ShellGetCurrentDir(NULL);
if (TempLocation == NULL) {
//
// No working directory is specified so whatever is left is ok.
//
return (TRUE);
}
Pattern = NULL;
SearchString = NULL;
Size = 0;
Pattern = StrnCatGrow(&Pattern, &Size, TempLocation , 0);
Pattern = StrnCatGrow(&Pattern, &Size, L"\\" , 0);
Size = 0;
SearchString = StrnCatGrow(&SearchString, &Size, Node->FullName, 0);
if (!EFI_ERROR(ShellIsDirectory(SearchString))) {
SearchString = StrnCatGrow(&SearchString, &Size, L"\\", 0);
SearchString = StrnCatGrow(&SearchString, &Size, L"*", 0);
}
if (Pattern == NULL || SearchString == NULL) {
RetVal = FALSE;
} else {
RetVal = TRUE;
if (gUnicodeCollation->MetaiMatch(gUnicodeCollation, Pattern, SearchString)) {
RetVal = FALSE;
}
}
SHELL_FREE_NON_NULL(Pattern );
SHELL_FREE_NON_NULL(SearchString);
return (RetVal);
}
/**
Function for 'rm' command.
@param[in] ImageHandle Handle to the Image (NULL if Internal).
@param[in] SystemTable Pointer to the System Table (NULL if Internal).
**/
SHELL_STATUS
EFIAPI
ShellCommandRunRm (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
LIST_ENTRY *Package;
CHAR16 *ProblemParam;
CONST CHAR16 *Param;
SHELL_STATUS ShellStatus;
UINTN ParamCount;
EFI_SHELL_FILE_INFO *FileList;
EFI_SHELL_FILE_INFO *Node;
ProblemParam = NULL;
ShellStatus = SHELL_SUCCESS;
ParamCount = 0;
FileList = NULL;
//
// initialize the shell lib (we must be in non-auto-init...)
//
Status = ShellInitialize();
ASSERT_EFI_ERROR(Status);
//
// parse the command line
//
Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
if (EFI_ERROR(Status)) {
if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, L"rm", ProblemParam);
FreePool(ProblemParam);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
ASSERT(FALSE);
}
} else {
//
// check for "-?"
//
if (ShellCommandLineGetFlag(Package, L"-?")) {
ASSERT(FALSE);
}
if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
//
// we insufficient parameters
//
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel2HiiHandle, L"rm");
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
//
// get a list with each file specified by parameters
// if parameter is a directory then add all the files below it to the list
//
for ( ParamCount = 1, Param = ShellCommandLineGetRawValue(Package, ParamCount)
; Param != NULL
; ParamCount++, Param = ShellCommandLineGetRawValue(Package, ParamCount)
){
Status = ShellOpenFileMetaArg((CHAR16*)Param, EFI_FILE_MODE_WRITE|EFI_FILE_MODE_READ, &FileList);
if (EFI_ERROR(Status) || FileList == NULL || IsListEmpty(&FileList->Link)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_NF), gShellLevel2HiiHandle, L"rm", (CHAR16*)Param);
ShellStatus = SHELL_NOT_FOUND;
break;
}
}
if (ShellStatus == SHELL_SUCCESS){
//
// loop through the list and make sure we are not aborting...
//
for ( Node = (EFI_SHELL_FILE_INFO*)GetFirstNode(&FileList->Link)
; !IsNull(&FileList->Link, &Node->Link) && !ShellGetExecutionBreakFlag()
; Node = (EFI_SHELL_FILE_INFO*)GetNextNode(&FileList->Link, &Node->Link)
){
//
// skip the directory traversing stuff...
//
if (StrCmp(Node->FileName, L".") == 0 || StrCmp(Node->FileName, L"..") == 0) {
continue;
}
//
// do the deleting of nodes
//
if (EFI_ERROR(Node->Status)){
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DELETE_ERR2), gShellLevel2HiiHandle, Node->Status);
ShellStatus = SHELL_ACCESS_DENIED;
break;
}
if (!IsValidDeleteTarget(FileList, Node, Package)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_RM_LOG_DELETE_ERR3), gShellLevel2HiiHandle, Node->FullName);
ShellStatus = SHELL_INVALID_PARAMETER;
break;
}
ShellStatus = CascadeDelete(Node, ShellCommandLineGetFlag(Package, L"-q"));
}
}
//
// Free the fileList
//
if (FileList != NULL) {
Status = ShellCloseFileMetaArg(&FileList);
}
FileList = NULL;
}
//
// free the command line package
//
ShellCommandLineFreeVarList (Package);
}
return (ShellStatus);
}
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