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/** @file
Main file for NULL named library for level 1 shell command functions.
(C) Copyright 2013 Hewlett-Packard Development Company, L.P.<BR>
Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "UefiShellLevel1CommandsLib.h"
STATIC CONST CHAR16 mFileName[] = L"ShellCommands";
EFI_HII_HANDLE gShellLevel1HiiHandle = NULL;
/**
Return the help text filename. Only used if no HII information found.
@retval the filename.
**/
CONST CHAR16 *
EFIAPI
ShellCommandGetManFileNameLevel1 (
VOID
)
{
return (mFileName);
}
/**
Constructor for the Shell Level 1 Commands library.
Install the handlers for level 1 UEFI Shell 2.0 commands.
@param ImageHandle the image handle of the process
@param SystemTable the EFI System Table pointer
@retval EFI_SUCCESS the shell command handlers were installed successfully
@retval EFI_UNSUPPORTED the shell level required was not found.
**/
EFI_STATUS
EFIAPI
ShellLevel1CommandsLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
//
// if shell level is less than 2 do nothing
//
if (PcdGet8 (PcdShellSupportLevel) < 1) {
return (EFI_SUCCESS);
}
gShellLevel1HiiHandle = HiiAddPackages (&gShellLevel1HiiGuid, gImageHandle, UefiShellLevel1CommandsLibStrings, NULL);
if (gShellLevel1HiiHandle == NULL) {
return (EFI_DEVICE_ERROR);
}
//
// install our shell command handlers that are always installed
//
ShellCommandRegisterCommandName (L"stall", ShellCommandRunStall, ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8 (PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN (STR_GET_HELP_STALL)));
ShellCommandRegisterCommandName (L"for", ShellCommandRunFor, ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8 (PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN (STR_GET_HELP_FOR)));
ShellCommandRegisterCommandName (L"goto", ShellCommandRunGoto, ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8 (PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN (STR_GET_HELP_GOTO)));
ShellCommandRegisterCommandName (L"if", ShellCommandRunIf, ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8 (PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN (STR_GET_HELP_IF)));
ShellCommandRegisterCommandName (L"shift", ShellCommandRunShift, ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8 (PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN (STR_GET_HELP_SHIFT)));
ShellCommandRegisterCommandName (L"exit", ShellCommandRunExit, ShellCommandGetManFileNameLevel1, 1, L"", TRUE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8 (PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN (STR_GET_HELP_EXIT)));
ShellCommandRegisterCommandName (L"else", ShellCommandRunElse, ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8 (PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN (STR_GET_HELP_ELSE)));
ShellCommandRegisterCommandName (L"endif", ShellCommandRunEndIf, ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8 (PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN (STR_GET_HELP_ENDIF)));
ShellCommandRegisterCommandName (L"endfor", ShellCommandRunEndFor, ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8 (PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN (STR_GET_HELP_ENDFOR)));
return (EFI_SUCCESS);
}
/**
Destructor for the library. free any resources.
@param ImageHandle The image handle of the process.
@param SystemTable The EFI System Table pointer.
**/
EFI_STATUS
EFIAPI
ShellLevel1CommandsLibDestructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
if (gShellLevel1HiiHandle != NULL) {
HiiRemovePackages (gShellLevel1HiiHandle);
}
return (EFI_SUCCESS);
}
/**
Test a node to see if meets the criterion.
It functions so that count starts at 1 and it increases or decreases when it
hits the specified tags. when it hits zero the location has been found.
DecrementerTag and IncrementerTag are used to get around for/endfor and
similar paired types where the entire middle should be ignored.
If label is used it will be used instead of the count.
@param[in] Function The function to use to enumerate through the
list. Normally GetNextNode or GetPreviousNode.
@param[in] DecrementerTag The tag to decrement the count at.
@param[in] IncrementerTag The tag to increment the count at.
@param[in] Label A label to look for.
@param[in, out] ScriptFile The pointer to the current script file structure.
@param[in] MovePast TRUE makes function return 1 past the found
location.
@param[in] FindOnly TRUE to not change the ScriptFile.
@param[in] CommandNode The pointer to the Node to test.
@param[in, out] TargetCount The pointer to the current count.
**/
BOOLEAN
TestNodeForMove (
IN CONST LIST_MANIP_FUNC Function,
IN CONST CHAR16 *DecrementerTag,
IN CONST CHAR16 *IncrementerTag,
IN CONST CHAR16 *Label OPTIONAL,
IN OUT SCRIPT_FILE *ScriptFile,
IN CONST BOOLEAN MovePast,
IN CONST BOOLEAN FindOnly,
IN CONST SCRIPT_COMMAND_LIST *CommandNode,
IN OUT UINTN *TargetCount
)
{
BOOLEAN Found;
CHAR16 *CommandName;
CHAR16 *CommandNameWalker;
CHAR16 *TempLocation;
Found = FALSE;
//
// get just the first part of the command line...
//
CommandName = NULL;
CommandName = StrnCatGrow (&CommandName, NULL, CommandNode->Cl, 0);
if (CommandName == NULL) {
return (FALSE);
}
CommandNameWalker = CommandName;
//
// Skip leading spaces and tabs.
//
while ((CommandNameWalker[0] == L' ') || (CommandNameWalker[0] == L'\t')) {
CommandNameWalker++;
}
TempLocation = StrStr (CommandNameWalker, L" ");
if (TempLocation != NULL) {
*TempLocation = CHAR_NULL;
}
//
// did we find a nested item ?
//
if (gUnicodeCollation->StriColl (
gUnicodeCollation,
(CHAR16 *)CommandNameWalker,
(CHAR16 *)IncrementerTag
) == 0)
{
(*TargetCount)++;
} else if (gUnicodeCollation->StriColl (
gUnicodeCollation,
(CHAR16 *)CommandNameWalker,
(CHAR16 *)DecrementerTag
) == 0)
{
if (*TargetCount > 0) {
(*TargetCount)--;
}
}
//
// did we find the matching one...
//
if (Label == NULL) {
if (*TargetCount == 0) {
Found = TRUE;
if (!FindOnly) {
if (MovePast) {
ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link);
} else {
ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)CommandNode;
}
}
}
} else {
if ( (gUnicodeCollation->StriColl (
gUnicodeCollation,
(CHAR16 *)CommandNameWalker,
(CHAR16 *)Label
) == 0)
&& ((*TargetCount) == 0))
{
Found = TRUE;
if (!FindOnly) {
//
// we found the target label without loops
//
if (MovePast) {
ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link);
} else {
ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)CommandNode;
}
}
}
}
//
// Free the memory for this loop...
//
FreePool (CommandName);
return (Found);
}
/**
Move the script pointer from 1 tag (line) to another.
It functions so that count starts at 1 and it increases or decreases when it
hits the specified tags. when it hits zero the location has been found.
DecrementerTag and IncrementerTag are used to get around for/endfor and
similar paired types where the entire middle should be ignored.
If label is used it will be used instead of the count.
@param[in] Function The function to use to enumerate through the
list. Normally GetNextNode or GetPreviousNode.
@param[in] DecrementerTag The tag to decrement the count at.
@param[in] IncrementerTag The tag to increment the count at.
@param[in] Label A label to look for.
@param[in, out] ScriptFile The pointer to the current script file structure.
@param[in] MovePast TRUE makes function return 1 past the found
location.
@param[in] FindOnly TRUE to not change the ScriptFile.
@param[in] WrapAroundScript TRUE to wrap end-to-beginning or vise versa in
searching.
**/
BOOLEAN
MoveToTag (
IN CONST LIST_MANIP_FUNC Function,
IN CONST CHAR16 *DecrementerTag,
IN CONST CHAR16 *IncrementerTag,
IN CONST CHAR16 *Label OPTIONAL,
IN OUT SCRIPT_FILE *ScriptFile,
IN CONST BOOLEAN MovePast,
IN CONST BOOLEAN FindOnly,
IN CONST BOOLEAN WrapAroundScript
)
{
SCRIPT_COMMAND_LIST *CommandNode;
BOOLEAN Found;
UINTN TargetCount;
if (Label == NULL) {
TargetCount = 1;
} else {
TargetCount = 0;
}
if (ScriptFile == NULL) {
return FALSE;
}
for (CommandNode = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &ScriptFile->CurrentCommand->Link), Found = FALSE
; !IsNull (&ScriptFile->CommandList, &CommandNode->Link) && !Found
; CommandNode = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link)
)
{
Found = TestNodeForMove (
Function,
DecrementerTag,
IncrementerTag,
Label,
ScriptFile,
MovePast,
FindOnly,
CommandNode,
&TargetCount
);
}
if (WrapAroundScript && !Found) {
for (CommandNode = (SCRIPT_COMMAND_LIST *)GetFirstNode (&ScriptFile->CommandList), Found = FALSE
; CommandNode != ScriptFile->CurrentCommand && !Found
; CommandNode = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link)
)
{
Found = TestNodeForMove (
Function,
DecrementerTag,
IncrementerTag,
Label,
ScriptFile,
MovePast,
FindOnly,
CommandNode,
&TargetCount
);
}
}
return (Found);
}
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