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/** @file
Main file for Help shell level 3 function.
Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved. <BR>
Copyright (c) 2014, ARM Limited. All rights reserved. <BR>
Copyright (c) 2015, Hewlett-Packard Development Company, L.P.<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>
#include <Library/HandleParsingLib.h>
#include <Protocol/EfiShellDynamicCommand.h>
/**
Attempt to print help from a dynamically added command.
@param[in] CommandToGetHelpOn The unicode name of the command that help is
requested on.
@param[in] SectionToGetHelpOn Pointer to the section specifier(s).
@param[in] PrintCommandText Print the command followed by the help content
or just help.
@retval EFI_SUCCESS The help was displayed
@retval EFI_NOT_FOUND The command name could not be found
@retval EFI_DEVICE_ERROR The help data format was incorrect.
**/
EFI_STATUS
EFIAPI
PrintDynamicCommandHelp(
IN CHAR16 *CommandToGetHelpOn,
IN CHAR16 *SectionToGetHelpOn,
IN BOOLEAN PrintCommandText
)
{
EFI_STATUS Status;
BOOLEAN Found;
EFI_HANDLE *CommandHandleList;
EFI_HANDLE *NextCommand;
EFI_SHELL_DYNAMIC_COMMAND_PROTOCOL *DynamicCommand;
Status = EFI_NOT_FOUND;
Found = FALSE;
CommandHandleList = NULL;
CommandHandleList = GetHandleListByProtocol(&gEfiShellDynamicCommandProtocolGuid);
if (CommandHandleList == NULL) {
//
// not found or out of resources
//
return Status;
}
for (NextCommand = CommandHandleList; *NextCommand != NULL; NextCommand++) {
Status = gBS->HandleProtocol(
*NextCommand,
&gEfiShellDynamicCommandProtocolGuid,
(VOID **)&DynamicCommand
);
if (EFI_ERROR(Status)) {
continue;
}
//
// Check execution break flag when printing multiple command help information.
//
if (ShellGetExecutionBreakFlag ()) {
break;
}
if ((gUnicodeCollation->MetaiMatch (gUnicodeCollation, (CHAR16 *)DynamicCommand->CommandName, CommandToGetHelpOn)) ||
(gEfiShellProtocol->GetAlias (CommandToGetHelpOn, NULL) != NULL && (gUnicodeCollation->MetaiMatch (gUnicodeCollation, (CHAR16 *)DynamicCommand->CommandName, (CHAR16*)(gEfiShellProtocol->GetAlias(CommandToGetHelpOn, NULL)))))) {
// Print as Shell Help if in ManPage format.
Status = ShellPrintHelp (DynamicCommand->CommandName, SectionToGetHelpOn,
PrintCommandText);
if (Status == EFI_DEVICE_ERROR) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_HELP_INV),
gShellLevel3HiiHandle, DynamicCommand->CommandName);
} else if (EFI_ERROR(Status)) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_HELP_NF),
gShellLevel3HiiHandle, DynamicCommand->CommandName);
} else {
Found = TRUE;
}
}
}
return (Found ? EFI_SUCCESS : Status);
}
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;
CONST COMMAND_LIST *CommandList;
CONST COMMAND_LIST *Node;
CHAR16 *CommandToGetHelpOn;
CHAR16 *SectionToGetHelpOn;
CHAR16 *HiiString;
BOOLEAN Found;
BOOLEAN PrintCommandText;
PrintCommandText = TRUE;
ProblemParam = NULL;
ShellStatus = SHELL_SUCCESS;
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, L"help", 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, L"help");
ShellStatus = SHELL_INVALID_PARAMETER;
} else if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle, L"help");
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 {
PrintCommandText = FALSE;
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 {
//
// The output of help <command> will display NAME, SYNOPSIS, OPTIONS, DESCRIPTION, and EXAMPLES sections.
//
StrnCatGrow (&SectionToGetHelpOn, NULL, L"NAME,SYNOPSIS,OPTIONS,DESCRIPTION,EXAMPLES", 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)
){
//
// Checking execution break flag when print multiple command help information.
//
if (ShellGetExecutionBreakFlag ()) {
break;
}
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 = ShellPrintHelp(Node->CommandString, SectionToGetHelpOn, PrintCommandText);
if (Status == EFI_DEVICE_ERROR) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_INV), gShellLevel3HiiHandle, Node->CommandString);
} else if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_NF), gShellLevel3HiiHandle, Node->CommandString);
} else {
Found = TRUE;
}
}
}
//
// now try to match against the dynamic command list and print help
//
Status = PrintDynamicCommandHelp (CommandToGetHelpOn, SectionToGetHelpOn,
PrintCommandText);
if (!EFI_ERROR(Status)) {
Found = TRUE;
}
//
// Search the .man file for Shell applications (Shell external commands).
//
if (!Found) {
Status = ShellPrintHelp(CommandToGetHelpOn, SectionToGetHelpOn, FALSE);
if (Status == EFI_DEVICE_ERROR) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_INV), gShellLevel3HiiHandle, CommandToGetHelpOn);
} else if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_NF), gShellLevel3HiiHandle, CommandToGetHelpOn);
} else {
Found = TRUE;
}
}
}
if (!Found) {
ShellStatus = SHELL_NOT_FOUND;
}
//
// free the command line package
//
ShellCommandLineFreeVarList (Package);
}
}
if (CommandToGetHelpOn != NULL && StrCmp(CommandToGetHelpOn, L"*") == 0){
//
// If '*' then the command entered was 'Help' without qualifiers, This footer
// provides additional info on help switches
//
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_HELP_FOOTER), gShellLevel3HiiHandle);
}
if (CommandToGetHelpOn != NULL) {
FreePool(CommandToGetHelpOn);
}
if (SectionToGetHelpOn != NULL) {
FreePool(SectionToGetHelpOn);
}
return (ShellStatus);
}
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