/** @file
Main file for Help shell level 3 function.
Copyright (c) 2009 - 2011, 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 "UefiShellLevel3CommandsLib.h"
#include <Library/ShellLib.h>
STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
{L"-usage", TypeFlag},
{L"-section", TypeMaxValue},
{L"-verbose", TypeFlag},
{L"-v", TypeFlag},
{NULL, TypeMax}
};
/**
Function for 'help' 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
ShellCommandRunHelp (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
LIST_ENTRY *Package;
CHAR16 *ProblemParam;
SHELL_STATUS ShellStatus;
CHAR16 *OutText;
CONST COMMAND_LIST *CommandList;
CONST COMMAND_LIST *Node;
CHAR16 *CommandToGetHelpOn;
CHAR16 *SectionToGetHelpOn;
CHAR16 *HiiString;
BOOLEAN Found;
ProblemParam = NULL;
ShellStatus = SHELL_SUCCESS;
OutText = NULL;
CommandToGetHelpOn = NULL;
SectionToGetHelpOn = NULL;
Found = FALSE;
//
// initialize the shell lib (we must be in non-auto-init...)
//
Status = ShellInitialize();
ASSERT_EFI_ERROR(Status);
Status = CommandInit();
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), gShellLevel3HiiHandle, ProblemParam);
FreePool(ProblemParam);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
ASSERT(FALSE);
}
} else {
//
// Check for conflicting parameters.
//
if (ShellCommandLineGetFlag(Package, L"-usage")
&&ShellCommandLineGetFlag(Package, L"-section")
&&(ShellCommandLineGetFlag(Package, L"-verbose") || ShellCommandLineGetFlag(Package, L"-v"))
){
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PARAM_CON), gShellLevel3HiiHandle);
ShellStatus = SHELL_INVALID_PARAMETER;
} else if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
//
// Get the command name we are getting help on
//
ASSERT(CommandToGetHelpOn == NULL);
StrnCatGrow(&CommandToGetHelpOn, NULL, ShellCommandLineGetRawValue(Package, 1), 0);
if (CommandToGetHelpOn == NULL && ShellCommandLineGetFlag(Package, L"-?")) {
//
// If we dont have a command and we got a simple -?
// we are looking for help on help command.
//
StrnCatGrow(&CommandToGetHelpOn, NULL, L"help", 0);
}
if (CommandToGetHelpOn == NULL) {
StrnCatGrow(&CommandToGetHelpOn, NULL, L"*", 0);
ASSERT(SectionToGetHelpOn == NULL);
StrnCatGrow(&SectionToGetHelpOn, NULL, L"NAME", 0);
} else {
ASSERT(SectionToGetHelpOn == NULL);
//
// Get the section name for the given command name
//
if (ShellCommandLineGetFlag(Package, L"-section")) {
StrnCatGrow(&SectionToGetHelpOn, NULL, ShellCommandLineGetValue(Package, L"-section"), 0);
} else if (ShellCommandLineGetFlag(Package, L"-usage")) {
StrnCatGrow(&SectionToGetHelpOn, NULL, L"NAME,SYNOPSIS", 0);
} else if (ShellCommandLineGetFlag(Package, L"-verbose") || ShellCommandLineGetFlag(Package, L"-v")) {
} else {
StrnCatGrow(&SectionToGetHelpOn, NULL, L"NAME", 0);
}
}
if (gUnicodeCollation->StriColl(gUnicodeCollation, CommandToGetHelpOn, L"special") == 0) {
//
// we need info on the special characters
//
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_SC_HEADER), gShellLevel3HiiHandle);
HiiString = HiiGetString(gShellLevel3HiiHandle, STRING_TOKEN(STR_HELP_SC_DATA), NULL);
ShellPrintEx(-1, -1, L"%s", HiiString);
FreePool(HiiString);
Found = TRUE;
} else {
CommandList = ShellCommandGetCommandList(TRUE);
ASSERT(CommandList != NULL);
for ( Node = (COMMAND_LIST*)GetFirstNode(&CommandList->Link)
; CommandList != NULL && !IsListEmpty(&CommandList->Link) && !IsNull(&CommandList->Link, &Node->Link)
; Node = (COMMAND_LIST*)GetNextNode(&CommandList->Link, &Node->Link)
){
if ((gUnicodeCollation->MetaiMatch(gUnicodeCollation, Node->CommandString, CommandToGetHelpOn)) ||
(gEfiShellProtocol->GetAlias(CommandToGetHelpOn, NULL) != NULL && (gUnicodeCollation->MetaiMatch(gUnicodeCollation, Node->CommandString, (CHAR16*)(gEfiShellProtocol->GetAlias(CommandToGetHelpOn, NULL)))))) {
//
// We have a command to look for help on.
//
Status = gEfiShellProtocol->GetHelpText(Node->CommandString, SectionToGetHelpOn, &OutText);
if (EFI_ERROR(Status) || OutText == NULL) {
if (Status == EFI_DEVICE_ERROR) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_INV), gShellLevel3HiiHandle, Node->CommandString);
} else {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_NF), gShellLevel3HiiHandle, Node->CommandString);
}
ShellStatus = SHELL_NOT_FOUND;
} else {
while (OutText[StrLen(OutText)-1] == L'\r' || OutText[StrLen(OutText)-1] == L'\n' || OutText[StrLen(OutText)-1] == L' ') {
OutText[StrLen(OutText)-1] = CHAR_NULL;
}
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_COMMAND), gShellLevel3HiiHandle, Node->CommandString, OutText);
FreePool(OutText);
OutText = NULL;
Found = TRUE;
}
}
}
}
if (!Found && ShellStatus == SHELL_SUCCESS) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_NF), gShellLevel3HiiHandle, CommandToGetHelpOn);
ShellStatus = SHELL_NOT_FOUND;
}
//
// free the command line package
//
ShellCommandLineFreeVarList (Package);
}
}
if (CommandToGetHelpOn != NULL) {
FreePool(CommandToGetHelpOn);
}
if (SectionToGetHelpOn != NULL) {
FreePool(SectionToGetHelpOn);
}
return (ShellStatus);
}