c3492bd9bb
In the for-loop condition of original code, the expression *CurrentCommand != CHAR_NULL is put before expression CurrentCommand < SortedCommandList + SortedCommandListSize/sizeof(CHAR16) When CurrentCommand walks to the end of string buffer, one more character over the end of string buffer will be read and then stop. To fix this issue, just move the last expression to the first one. Because of short-circuit evaludation of and-expression, the following one *CurrentCommand != CHAR_NULL will not be evaluated if the expression before it is evaludated as FALSE. Cc: Ruiyu Ni <ruiyu.ni@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jian J Wang <jian.j.wang@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
475 lines
16 KiB
C
475 lines
16 KiB
C
/** @file
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Main file for Help shell level 3 function.
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Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved. <BR>
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Copyright (c) 2014, ARM Limited. All rights reserved. <BR>
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(C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "UefiShellLevel3CommandsLib.h"
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#include <Library/ShellLib.h>
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#include <Library/HandleParsingLib.h>
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#include <Protocol/ShellDynamicCommand.h>
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/**
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function to insert string items into a list in the correct alphabetical place
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the resultant list is a double NULL terminated list of NULL terminated strings.
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upon successful return the memory must be caller freed (unless passed back in
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via a loop where it will get reallocated).
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@param[in,out] DestList double pointer to the list. may be NULL.
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@param[in,out] DestSize pointer to the size of list. may be 0, if DestList is NULL.
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@param[in] Item the item to insert.
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@retval EFI_SUCCESS the operation was successful.
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**/
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EFI_STATUS
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LexicalInsertIntoList(
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IN OUT CHAR16 **DestList,
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IN OUT UINTN *DestSize,
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IN CONST CHAR16 *Item
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)
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{
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CHAR16 *NewList;
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INTN LexicalMatchValue;
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CHAR16 *LexicalSpot;
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UINTN SizeOfAddedNameInBytes;
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//
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// If there are none, then just return with success
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//
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if (Item == NULL || *Item == CHAR_NULL || StrLen(Item)==0) {
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return (EFI_SUCCESS);
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}
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NewList = *DestList;
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SizeOfAddedNameInBytes = StrSize(Item);
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NewList = ReallocatePool(*DestSize, (*DestSize) + SizeOfAddedNameInBytes, NewList);
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(*DestSize) = (*DestSize) + SizeOfAddedNameInBytes;
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//
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// Find the correct spot in the list
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//
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for (LexicalSpot = NewList
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; LexicalSpot != NULL && LexicalSpot < NewList + (*DestSize)
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; LexicalSpot += StrLen(LexicalSpot) + 1
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) {
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//
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// Get Lexical Comparison Value between PrevCommand and Command list entry
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//
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LexicalMatchValue = gUnicodeCollation->StriColl (
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gUnicodeCollation,
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(CHAR16 *)LexicalSpot,
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(CHAR16 *)Item
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);
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//
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// The new item goes before this one.
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//
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if (LexicalMatchValue > 0 || StrLen(LexicalSpot) == 0) {
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if (StrLen(LexicalSpot) != 0) {
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//
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// Move this and all other items out of the way
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//
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CopyMem(
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LexicalSpot + (SizeOfAddedNameInBytes/sizeof(CHAR16)),
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LexicalSpot,
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(*DestSize) - SizeOfAddedNameInBytes - ((LexicalSpot - NewList) * sizeof(CHAR16))
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);
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}
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//
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// Stick this one in place
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//
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StrCpyS(LexicalSpot, SizeOfAddedNameInBytes/sizeof(CHAR16), Item);
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break;
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}
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}
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*DestList = NewList;
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return (EFI_SUCCESS);
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}
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/**
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function to add each command name from the linked list to the string list.
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the resultant list is a double NULL terminated list of NULL terminated strings.
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@param[in,out] DestList double pointer to the list. may be NULL.
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@param[in,out] DestSize pointer to the size of list. may be 0, if DestList is NULL.
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@param[in] SourceList the double linked list of commands.
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@retval EFI_SUCCESS the operation was successful.
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**/
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EFI_STATUS
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CopyListOfCommandNames(
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IN OUT CHAR16 **DestList,
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IN OUT UINTN *DestSize,
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IN CONST COMMAND_LIST *SourceList
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)
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{
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CONST COMMAND_LIST *Node;
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for ( Node = (COMMAND_LIST*)GetFirstNode(&SourceList->Link)
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; SourceList != NULL && !IsListEmpty(&SourceList->Link) && !IsNull(&SourceList->Link, &Node->Link)
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; Node = (COMMAND_LIST*)GetNextNode(&SourceList->Link, &Node->Link)
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) {
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LexicalInsertIntoList(DestList, DestSize, Node->CommandString);
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}
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return (EFI_SUCCESS);
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}
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/**
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function to add each dynamic command name to the string list.
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the resultant list is a double NULL terminated list of NULL terminated strings.
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@param[in,out] DestList double pointer to the list. may be NULL.
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@param[in,out] DestSize pointer to the size of list. may be 0, if DestList is NULL.
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@retval EFI_SUCCESS the operation was successful.
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@return an error from HandleProtocol
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**/
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STATIC
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EFI_STATUS
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CopyListOfCommandNamesWithDynamic(
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IN OUT CHAR16** DestList,
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IN OUT UINTN *DestSize
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)
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{
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EFI_HANDLE *CommandHandleList;
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CONST EFI_HANDLE *NextCommand;
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EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL *DynamicCommand;
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EFI_STATUS Status;
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CommandHandleList = GetHandleListByProtocol(&gEfiShellDynamicCommandProtocolGuid);
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//
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// If there are none, then just return with success
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//
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if (CommandHandleList == NULL) {
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return (EFI_SUCCESS);
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}
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Status = EFI_SUCCESS;
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//
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// Append those to the list.
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//
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for (NextCommand = CommandHandleList ; *NextCommand != NULL && !EFI_ERROR(Status) ; NextCommand++) {
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Status = gBS->HandleProtocol(
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*NextCommand,
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&gEfiShellDynamicCommandProtocolGuid,
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(VOID **)&DynamicCommand
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);
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if (EFI_ERROR(Status)) {
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continue;
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}
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Status = LexicalInsertIntoList(DestList, DestSize, DynamicCommand->CommandName);
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}
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SHELL_FREE_NON_NULL(CommandHandleList);
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return (Status);
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}
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/**
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Attempt to print help from a dynamically added command.
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@param[in] CommandToGetHelpOn The unicode name of the command that help is
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requested on.
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@param[in] SectionToGetHelpOn Pointer to the section specifier(s).
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@param[in] PrintCommandText Print the command followed by the help content
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or just help.
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@retval EFI_SUCCESS The help was displayed
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@retval EFI_NOT_FOUND The command name could not be found
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@retval EFI_DEVICE_ERROR The help data format was incorrect.
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**/
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EFI_STATUS
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PrintDynamicCommandHelp(
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IN CONST CHAR16 *CommandToGetHelpOn,
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IN CONST CHAR16 *SectionToGetHelpOn,
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IN BOOLEAN PrintCommandText
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)
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{
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EFI_STATUS Status;
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BOOLEAN Found;
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EFI_HANDLE *CommandHandleList;
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EFI_HANDLE *NextCommand;
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EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL *DynamicCommand;
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Status = EFI_NOT_FOUND;
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Found = FALSE;
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CommandHandleList = NULL;
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CommandHandleList = GetHandleListByProtocol(&gEfiShellDynamicCommandProtocolGuid);
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if (CommandHandleList == NULL) {
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//
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// not found or out of resources
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//
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return Status;
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}
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for (NextCommand = CommandHandleList; *NextCommand != NULL; NextCommand++) {
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Status = gBS->HandleProtocol(
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*NextCommand,
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&gEfiShellDynamicCommandProtocolGuid,
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(VOID **)&DynamicCommand
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);
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if (EFI_ERROR(Status)) {
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continue;
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}
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//
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// Check execution break flag when printing multiple command help information.
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//
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if (ShellGetExecutionBreakFlag ()) {
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break;
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}
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if ((gUnicodeCollation->MetaiMatch (gUnicodeCollation, (CHAR16 *)DynamicCommand->CommandName, (CHAR16*)CommandToGetHelpOn)) ||
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(gEfiShellProtocol->GetAlias (CommandToGetHelpOn, NULL) != NULL && (gUnicodeCollation->MetaiMatch (gUnicodeCollation, (CHAR16 *)DynamicCommand->CommandName, (CHAR16*)(gEfiShellProtocol->GetAlias(CommandToGetHelpOn, NULL)))))) {
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// Print as Shell Help if in ManPage format.
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Status = ShellPrintHelp (DynamicCommand->CommandName, SectionToGetHelpOn,
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PrintCommandText);
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if (Status == EFI_DEVICE_ERROR) {
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ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_HELP_INV),
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gShellLevel3HiiHandle, DynamicCommand->CommandName);
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} else if (EFI_ERROR(Status)) {
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ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_HELP_NF),
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gShellLevel3HiiHandle, DynamicCommand->CommandName);
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} else {
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Found = TRUE;
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}
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}
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}
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SHELL_FREE_NON_NULL(CommandHandleList);
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return (Found ? EFI_SUCCESS : Status);
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}
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STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
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{L"-usage", TypeFlag},
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{L"-section", TypeMaxValue},
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{L"-verbose", TypeFlag},
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{L"-v", TypeFlag},
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{NULL, TypeMax}
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};
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/**
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Function for 'help' command.
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@param[in] ImageHandle Handle to the Image (NULL if Internal).
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@param[in] SystemTable Pointer to the System Table (NULL if Internal).
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**/
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SHELL_STATUS
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EFIAPI
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ShellCommandRunHelp (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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LIST_ENTRY *Package;
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CHAR16 *ProblemParam;
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SHELL_STATUS ShellStatus;
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CHAR16 *SortedCommandList;
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CONST CHAR16 *CurrentCommand;
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CHAR16 *CommandToGetHelpOn;
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CHAR16 *SectionToGetHelpOn;
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CHAR16 *HiiString;
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BOOLEAN Found;
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BOOLEAN PrintCommandText;
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UINTN SortedCommandListSize;
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PrintCommandText = TRUE;
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ProblemParam = NULL;
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ShellStatus = SHELL_SUCCESS;
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CommandToGetHelpOn = NULL;
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SectionToGetHelpOn = NULL;
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SortedCommandList = NULL;
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Found = FALSE;
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//
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// initialize the shell lib (we must be in non-auto-init...)
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//
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Status = ShellInitialize();
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ASSERT_EFI_ERROR(Status);
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Status = CommandInit();
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ASSERT_EFI_ERROR(Status);
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//
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// parse the command line
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//
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Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
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if (EFI_ERROR(Status)) {
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if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, L"help", ProblemParam);
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FreePool(ProblemParam);
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ShellStatus = SHELL_INVALID_PARAMETER;
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} else {
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ASSERT(FALSE);
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}
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} else {
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//
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// Check for conflicting parameters.
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//
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if (ShellCommandLineGetFlag(Package, L"-usage")
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&&ShellCommandLineGetFlag(Package, L"-section")
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&&(ShellCommandLineGetFlag(Package, L"-verbose") || ShellCommandLineGetFlag(Package, L"-v"))
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){
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PARAM_CON), gShellLevel3HiiHandle, L"help");
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ShellStatus = SHELL_INVALID_PARAMETER;
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} else if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle, L"help");
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ShellStatus = SHELL_INVALID_PARAMETER;
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} else {
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//
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// Get the command name we are getting help on
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//
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ASSERT(CommandToGetHelpOn == NULL);
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StrnCatGrow(&CommandToGetHelpOn, NULL, ShellCommandLineGetRawValue(Package, 1), 0);
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if (CommandToGetHelpOn == NULL && ShellCommandLineGetFlag(Package, L"-?")) {
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//
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// If we dont have a command and we got a simple -?
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// we are looking for help on help command.
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//
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StrnCatGrow(&CommandToGetHelpOn, NULL, L"help", 0);
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}
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if (CommandToGetHelpOn == NULL) {
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StrnCatGrow(&CommandToGetHelpOn, NULL, L"*", 0);
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ASSERT(SectionToGetHelpOn == NULL);
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StrnCatGrow(&SectionToGetHelpOn, NULL, L"NAME", 0);
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} else {
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PrintCommandText = FALSE;
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ASSERT(SectionToGetHelpOn == NULL);
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//
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// Get the section name for the given command name
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//
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if (ShellCommandLineGetFlag(Package, L"-section")) {
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StrnCatGrow(&SectionToGetHelpOn, NULL, ShellCommandLineGetValue(Package, L"-section"), 0);
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} else if (ShellCommandLineGetFlag(Package, L"-usage")) {
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StrnCatGrow(&SectionToGetHelpOn, NULL, L"NAME,SYNOPSIS", 0);
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} else if (ShellCommandLineGetFlag(Package, L"-verbose") || ShellCommandLineGetFlag(Package, L"-v")) {
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} else {
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//
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// The output of help <command> will display NAME, SYNOPSIS, OPTIONS, DESCRIPTION, and EXAMPLES sections.
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//
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StrnCatGrow (&SectionToGetHelpOn, NULL, L"NAME,SYNOPSIS,OPTIONS,DESCRIPTION,EXAMPLES", 0);
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}
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}
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if (gUnicodeCollation->StriColl(gUnicodeCollation, CommandToGetHelpOn, L"special") == 0) {
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//
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// we need info on the special characters
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//
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_SC_HEADER), gShellLevel3HiiHandle);
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HiiString = HiiGetString(gShellLevel3HiiHandle, STRING_TOKEN(STR_HELP_SC_DATA), NULL);
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ShellPrintEx(-1, -1, L"%s", HiiString);
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FreePool(HiiString);
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Found = TRUE;
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} else {
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SortedCommandList = NULL;
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SortedCommandListSize = 0;
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CopyListOfCommandNames(&SortedCommandList, &SortedCommandListSize, ShellCommandGetCommandList(TRUE));
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CopyListOfCommandNamesWithDynamic(&SortedCommandList, &SortedCommandListSize);
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for (CurrentCommand = SortedCommandList
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; CurrentCommand != NULL && CurrentCommand < SortedCommandList + SortedCommandListSize/sizeof(CHAR16) && *CurrentCommand != CHAR_NULL
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; CurrentCommand += StrLen(CurrentCommand) + 1
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) {
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//
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// Checking execution break flag when print multiple command help information.
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//
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if (ShellGetExecutionBreakFlag ()) {
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break;
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}
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if ((gUnicodeCollation->MetaiMatch(gUnicodeCollation, (CHAR16*)CurrentCommand, CommandToGetHelpOn)) ||
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(gEfiShellProtocol->GetAlias(CommandToGetHelpOn, NULL) != NULL && (gUnicodeCollation->MetaiMatch(gUnicodeCollation, (CHAR16*)CurrentCommand, (CHAR16*)(gEfiShellProtocol->GetAlias(CommandToGetHelpOn, NULL)))))) {
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//
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// We have a command to look for help on.
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//
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Status = ShellPrintHelp(CurrentCommand, SectionToGetHelpOn, PrintCommandText);
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if (EFI_ERROR(Status)) {
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//
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// now try to match against the dynamic command list and print help
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//
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Status = PrintDynamicCommandHelp (CurrentCommand, SectionToGetHelpOn, PrintCommandText);
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}
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if (Status == EFI_DEVICE_ERROR) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_INV), gShellLevel3HiiHandle, CurrentCommand);
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} else if (EFI_ERROR(Status)) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_NF), gShellLevel3HiiHandle, CurrentCommand);
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} else {
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Found = TRUE;
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}
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}
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}
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//
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// Search the .man file for Shell applications (Shell external commands).
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//
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if (!Found) {
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Status = ShellPrintHelp(CommandToGetHelpOn, SectionToGetHelpOn, FALSE);
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if (Status == EFI_DEVICE_ERROR) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_INV), gShellLevel3HiiHandle, CommandToGetHelpOn);
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} else if (EFI_ERROR(Status)) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_NF), gShellLevel3HiiHandle, CommandToGetHelpOn);
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} else {
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Found = TRUE;
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}
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}
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}
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if (!Found) {
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ShellStatus = SHELL_NOT_FOUND;
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}
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//
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// free the command line package
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//
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ShellCommandLineFreeVarList (Package);
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}
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}
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if (CommandToGetHelpOn != NULL && StrCmp(CommandToGetHelpOn, L"*") == 0){
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//
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// If '*' then the command entered was 'Help' without qualifiers, This footer
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// provides additional info on help switches
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//
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_FOOTER), gShellLevel3HiiHandle);
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}
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if (CommandToGetHelpOn != NULL) {
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FreePool(CommandToGetHelpOn);
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}
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if (SectionToGetHelpOn != NULL) {
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FreePool(SectionToGetHelpOn);
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}
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SHELL_FREE_NON_NULL(SortedCommandList);
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return (ShellStatus);
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}
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