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audk/ShellPkg/Application/Shell/ShellParametersProtocol.c

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/** @file
Member functions of EFI_SHELL_PARAMETERS_PROTOCOL and functions for creation,
manipulation, and initialization of EFI_SHELL_PARAMETERS_PROTOCOL.
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 "ShellParametersProtocol.h"
#include "ConsoleWrappers.h"
/**
return the next parameter from a command line string;
This function moves the next parameter from Walker into TempParameter and moves
Walker up past that parameter for recursive calling. When the final parameter
is moved *Walker will be set to NULL;
Temp Parameter must be large enough to hold the parameter before calling this
function.
@param[in, out] Walker pointer to string of command line. Adjusted to
reminaing command line on return
@param[in, out] TempParameter pointer to string of command line item extracted.
**/
VOID
EFIAPI
GetNextParameter(
CHAR16 **Walker,
CHAR16 **TempParameter
)
{
CHAR16 *NextDelim;
CHAR16 *TempLoc;
ASSERT(Walker != NULL);
ASSERT(*Walker != NULL);
ASSERT(TempParameter != NULL);
ASSERT(*TempParameter != NULL);
//
// make sure we dont have any leading spaces
//
while ((*Walker)[0] == L' ') {
(*Walker)++;
}
//
// make sure we still have some params now...
//
if (StrLen(*Walker) == 0) {
ASSERT((*Walker)[0] == CHAR_NULL);
*Walker = NULL;
return;
}
//
// we have a quoted parameter
// could be the last parameter, but SHOULD have a trailing quote
//
if ((*Walker)[0] == L'\"') {
NextDelim = NULL;
for (TempLoc = *Walker + 1 ; TempLoc != NULL && *TempLoc != CHAR_NULL ; TempLoc++) {
if (*TempLoc == L'^' && *(TempLoc+1) == L'\"') {
TempLoc++;
} else if (*TempLoc == L'\"') {
NextDelim = TempLoc;
break;
}
}
if (NextDelim - ((*Walker)+1) == 0) {
//
// found ""
//
StrCpy(*TempParameter, L"");
*Walker = NextDelim + 1;
} else if (NextDelim != NULL) {
StrnCpy(*TempParameter, (*Walker)+1, NextDelim - ((*Walker)+1));
*Walker = NextDelim + 1;
} else {
//
// last one... someone forgot the training quote!
//
StrCpy(*TempParameter, *Walker);
*Walker = NULL;
}
for (TempLoc = *TempParameter ; TempLoc != NULL && *TempLoc != CHAR_NULL ; TempLoc++) {
if (*TempLoc == L'^' && *(TempLoc+1) == L'\"') {
CopyMem(TempLoc, TempLoc+1, StrSize(TempLoc) - sizeof(TempLoc[0]));
}
}
} else {
//
// we have a regular parameter (no quote) OR
// we have the final parameter (no trailing space)
//
NextDelim = StrStr((*Walker), L" ");
if (NextDelim != NULL) {
StrnCpy(*TempParameter, *Walker, NextDelim - (*Walker));
(*TempParameter)[NextDelim - (*Walker)] = CHAR_NULL;
*Walker = NextDelim+1;
} else {
//
// last one.
//
StrCpy(*TempParameter, *Walker);
*Walker = NULL;
}
for (NextDelim = *TempParameter ; NextDelim != NULL && *NextDelim != CHAR_NULL ; NextDelim++) {
if (*NextDelim == L'^' && *(NextDelim+1) == L'^') {
CopyMem(NextDelim, NextDelim+1, StrSize(NextDelim) - sizeof(NextDelim[0]));
}
}
while ((*TempParameter)[StrLen(*TempParameter)-1] == L' ') {
(*TempParameter)[StrLen(*TempParameter)-1] = CHAR_NULL;
}
while ((*TempParameter)[0] == L' ') {
CopyMem(*TempParameter, (*TempParameter)+1, StrSize(*TempParameter) - sizeof((*TempParameter)[0]));
}
}
return;
}
/**
Function to populate Argc and Argv.
This function parses the CommandLine and divides it into standard C style Argc/Argv
parameters for inclusion in EFI_SHELL_PARAMETERS_PROTOCOL. this supports space
delimited and quote surrounded parameter definition.
@param[in] CommandLine String of command line to parse
@param[in, out] Argv pointer to array of strings; one for each parameter
@param[in, out] Argc pointer to number of strings in Argv array
@return EFI_SUCCESS the operation was sucessful
@return EFI_OUT_OF_RESOURCES a memory allocation failed.
**/
EFI_STATUS
EFIAPI
ParseCommandLineToArgs(
IN CONST CHAR16 *CommandLine,
IN OUT CHAR16 ***Argv,
IN OUT UINTN *Argc
)
{
UINTN Count;
CHAR16 *TempParameter;
CHAR16 *Walker;
CHAR16 *NewParam;
UINTN Size;
ASSERT(Argc != NULL);
ASSERT(Argv != NULL);
if (CommandLine == NULL || StrLen(CommandLine)==0) {
(*Argc) = 0;
(*Argv) = NULL;
return (EFI_SUCCESS);
}
Size = StrSize(CommandLine);
TempParameter = AllocateZeroPool(Size);
if (TempParameter == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
for ( Count = 0
, Walker = (CHAR16*)CommandLine
; Walker != NULL && *Walker != CHAR_NULL
; GetNextParameter(&Walker, &TempParameter)
, Count++
);
/* Count = 0;
Walker = (CHAR16*)CommandLine;
while(Walker != NULL) {
GetNextParameter(&Walker, &TempParameter);
Count++;
}
*/
//
// lets allocate the pointer array
//
(*Argv) = AllocateZeroPool((Count)*sizeof(CHAR16*));
if (*Argv == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
*Argc = 0;
Walker = (CHAR16*)CommandLine;
while(Walker != NULL && *Walker != CHAR_NULL) {
SetMem16(TempParameter, Size, CHAR_NULL);
GetNextParameter(&Walker, &TempParameter);
NewParam = AllocateZeroPool(StrSize(TempParameter));
ASSERT(NewParam != NULL);
StrCpy(NewParam, TempParameter);
((CHAR16**)(*Argv))[(*Argc)] = NewParam;
(*Argc)++;
}
ASSERT(Count >= (*Argc));
return (EFI_SUCCESS);
}
/**
creates a new EFI_SHELL_PARAMETERS_PROTOCOL instance and populates it and then
installs it on our handle and if there is an existing version of the protocol
that one is cached for removal later.
@param[in, out] NewShellParameters on a successful return, a pointer to pointer
to the newly installed interface.
@param[in, out] RootShellInstance on a successful return, pointer to boolean.
TRUE if this is the root shell instance.
@retval EFI_SUCCESS the operation completed successfully.
@return other the operation failed.
@sa ReinstallProtocolInterface
@sa InstallProtocolInterface
@sa ParseCommandLineToArgs
**/
EFI_STATUS
EFIAPI
CreatePopulateInstallShellParametersProtocol (
IN OUT EFI_SHELL_PARAMETERS_PROTOCOL **NewShellParameters,
IN OUT BOOLEAN *RootShellInstance
)
{
EFI_STATUS Status;
EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
CHAR16 *FullCommandLine;
UINTN Size;
Size = 0;
FullCommandLine = NULL;
LoadedImage = NULL;
//
// Assert for valid parameters
//
ASSERT(NewShellParameters != NULL);
ASSERT(RootShellInstance != NULL);
//
// See if we have a shell parameters placed on us
//
Status = gBS->OpenProtocol (
gImageHandle,
&gEfiShellParametersProtocolGuid,
(VOID **) &ShellInfoObject.OldShellParameters,
gImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
//
// if we don't then we must be the root shell (error is expected)
//
if (EFI_ERROR (Status)) {
*RootShellInstance = TRUE;
}
//
// Allocate the new structure
//
*NewShellParameters = AllocateZeroPool(sizeof(EFI_SHELL_PARAMETERS_PROTOCOL));
if ((*NewShellParameters) == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
//
// get loaded image protocol
//
Status = gBS->OpenProtocol (
gImageHandle,
&gEfiLoadedImageProtocolGuid,
(VOID **) &LoadedImage,
gImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
ASSERT_EFI_ERROR(Status);
//
// Build the full command line
//
Status = SHELL_GET_ENVIRONMENT_VARIABLE(L"ShellOpt", &Size, &FullCommandLine);
if (Status == EFI_BUFFER_TOO_SMALL) {
FullCommandLine = AllocateZeroPool(Size + LoadedImage->LoadOptionsSize);
Status = SHELL_GET_ENVIRONMENT_VARIABLE(L"ShellOpt", &Size, &FullCommandLine);
}
if (Status == EFI_NOT_FOUND) {
//
// no parameters via environment... ok
//
} else {
if (EFI_ERROR(Status)) {
return (Status);
}
}
if (Size == 0 && LoadedImage->LoadOptionsSize != 0) {
ASSERT(FullCommandLine == NULL);
//
// Now we need to include a NULL terminator in the size.
//
Size = LoadedImage->LoadOptionsSize + sizeof(FullCommandLine[0]);
FullCommandLine = AllocateZeroPool(Size);
}
if (FullCommandLine != NULL) {
if (LoadedImage->LoadOptionsSize != 0){
StrCpy(FullCommandLine, LoadedImage->LoadOptions);
}
//
// Populate Argc and Argv
//
Status = ParseCommandLineToArgs(FullCommandLine,
&(*NewShellParameters)->Argv,
&(*NewShellParameters)->Argc);
FreePool(FullCommandLine);
ASSERT_EFI_ERROR(Status);
} else {
(*NewShellParameters)->Argv = NULL;
(*NewShellParameters)->Argc = 0;
}
//
// Populate the 3 faked file systems...
//
if (*RootShellInstance) {
(*NewShellParameters)->StdIn = &FileInterfaceStdIn;
(*NewShellParameters)->StdOut = &FileInterfaceStdOut;
(*NewShellParameters)->StdErr = &FileInterfaceStdErr;
Status = gBS->InstallProtocolInterface(&gImageHandle,
&gEfiShellParametersProtocolGuid,
EFI_NATIVE_INTERFACE,
(VOID*)(*NewShellParameters));
} else {
//
// copy from the existing ones
//
(*NewShellParameters)->StdIn = ShellInfoObject.OldShellParameters->StdIn;
(*NewShellParameters)->StdOut = ShellInfoObject.OldShellParameters->StdOut;
(*NewShellParameters)->StdErr = ShellInfoObject.OldShellParameters->StdErr;
Status = gBS->ReinstallProtocolInterface(gImageHandle,
&gEfiShellParametersProtocolGuid,
(VOID*)ShellInfoObject.OldShellParameters,
(VOID*)(*NewShellParameters));
}
return (Status);
}
/**
frees all memory used by createion and installation of shell parameters protocol
and if there was an old version installed it will restore that one.
@param NewShellParameters the interface of EFI_SHELL_PARAMETERS_PROTOCOL that is
being cleaned up.
@retval EFI_SUCCESS the cleanup was successful
@return other the cleanup failed
@sa ReinstallProtocolInterface
@sa UninstallProtocolInterface
**/
EFI_STATUS
EFIAPI
CleanUpShellParametersProtocol (
IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *NewShellParameters
)
{
EFI_STATUS Status;
UINTN LoopCounter;
//
// If the old exists we need to restore it
//
if (ShellInfoObject.OldShellParameters != NULL) {
Status = gBS->ReinstallProtocolInterface(gImageHandle,
&gEfiShellParametersProtocolGuid,
(VOID*)NewShellParameters,
(VOID*)ShellInfoObject.OldShellParameters);
DEBUG_CODE(ShellInfoObject.OldShellParameters = NULL;);
} else {
//
// No old one, just uninstall us...
//
Status = gBS->UninstallProtocolInterface(gImageHandle,
&gEfiShellParametersProtocolGuid,
(VOID*)NewShellParameters);
}
if (NewShellParameters->Argv != NULL) {
for ( LoopCounter = 0
; LoopCounter < NewShellParameters->Argc
; LoopCounter++
){
FreePool(NewShellParameters->Argv[LoopCounter]);
}
FreePool(NewShellParameters->Argv);
}
FreePool(NewShellParameters);
return (Status);
}
/**
Determin if a file name represents a unicode file.
@param[in] FileName Pointer to the filename to open.
@retval EFI_SUCCESS The file is a unicode file.
@return An error upon failure.
**/
EFI_STATUS
EFIAPI
IsUnicodeFile(
IN CONST CHAR16 *FileName
)
{
SHELL_FILE_HANDLE Handle;
EFI_STATUS Status;
UINT64 OriginalFilePosition;
UINTN CharSize;
CHAR16 CharBuffer;
Status = gEfiShellProtocol->OpenFileByName(FileName, &Handle, EFI_FILE_MODE_READ);
if (EFI_ERROR(Status)) {
return (Status);
}
gEfiShellProtocol->GetFilePosition(Handle, &OriginalFilePosition);
gEfiShellProtocol->SetFilePosition(Handle, 0);
CharSize = sizeof(CHAR16);
Status = gEfiShellProtocol->ReadFile(Handle, &CharSize, &CharBuffer);
if (EFI_ERROR(Status) || CharBuffer != gUnicodeFileTag) {
Status = EFI_BUFFER_TOO_SMALL;
}
gEfiShellProtocol->SetFilePosition(Handle, OriginalFilePosition);
gEfiShellProtocol->CloseFile(Handle);
return (Status);
}
/**
Strips out quotes sections of a string.
All of the characters between quotes is replaced with spaces.
@param[in, out] TheString A pointer to the string to update.
**/
VOID
EFIAPI
StripQuotes (
IN OUT CHAR16 *TheString
)
{
BOOLEAN RemoveNow;
for (RemoveNow = FALSE ; TheString != NULL && *TheString != CHAR_NULL ; TheString++) {
if (*TheString == L'^' && *(TheString + 1) == L'\"') {
TheString++;
} else if (*TheString == L'\"') {
RemoveNow = (BOOLEAN)!RemoveNow;
} else if (RemoveNow) {
*TheString = L' ';
}
}
}
/**
Calcualte the 32-bit CRC in a EFI table using the service provided by the
gRuntime service.
@param Hdr Pointer to an EFI standard header
**/
VOID
CalculateEfiHdrCrc (
IN OUT EFI_TABLE_HEADER *Hdr
)
{
UINT32 Crc;
Hdr->CRC32 = 0;
//
// If gBS->CalculateCrce32 () == CoreEfiNotAvailableYet () then
// Crc will come back as zero if we set it to zero here
//
Crc = 0;
gBS->CalculateCrc32 ((UINT8 *)Hdr, Hdr->HeaderSize, &Crc);
Hdr->CRC32 = Crc;
}
/**
Funcion will replace the current StdIn and StdOut in the ShellParameters protocol
structure by parsing NewCommandLine. The current values are returned to the
user.
This will also update the system table.
@param[in, out] ShellParameters Pointer to parameter structure to modify.
@param[in] NewCommandLine The new command line to parse and use.
@param[out] OldStdIn Pointer to old StdIn.
@param[out] OldStdOut Pointer to old StdOut.
@param[out] OldStdErr Pointer to old StdErr.
@param[out] SystemTableInfo Pointer to old system table information.
@retval EFI_SUCCESS Operation was sucessful, Argv and Argc are valid.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
**/
EFI_STATUS
EFIAPI
UpdateStdInStdOutStdErr(
IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *ShellParameters,
IN CHAR16 *NewCommandLine,
OUT SHELL_FILE_HANDLE *OldStdIn,
OUT SHELL_FILE_HANDLE *OldStdOut,
OUT SHELL_FILE_HANDLE *OldStdErr,
OUT SYSTEM_TABLE_INFO *SystemTableInfo
)
{
CHAR16 *CommandLineCopy;
CHAR16 *CommandLineWalker;
CHAR16 *StdErrFileName;
CHAR16 *StdOutFileName;
CHAR16 *StdInFileName;
CHAR16 *StdInVarName;
CHAR16 *StdOutVarName;
CHAR16 *StdErrVarName;
EFI_STATUS Status;
SHELL_FILE_HANDLE TempHandle;
UINT64 FileSize;
BOOLEAN OutUnicode;
BOOLEAN InUnicode;
BOOLEAN ErrUnicode;
BOOLEAN OutAppend;
BOOLEAN ErrAppend;
UINTN Size;
CHAR16 TagBuffer[2];
SPLIT_LIST *Split;
CHAR16 *FirstLocation;
OutUnicode = TRUE;
InUnicode = TRUE;
ErrUnicode = TRUE;
StdInVarName = NULL;
StdOutVarName = NULL;
StdErrVarName = NULL;
StdErrFileName = NULL;
StdInFileName = NULL;
StdOutFileName = NULL;
ErrAppend = FALSE;
OutAppend = FALSE;
CommandLineCopy = NULL;
FirstLocation = NULL;
if (ShellParameters == NULL || SystemTableInfo == NULL || OldStdIn == NULL || OldStdOut == NULL || OldStdErr == NULL) {
return (EFI_INVALID_PARAMETER);
}
SystemTableInfo->ConIn = gST->ConIn;
SystemTableInfo->ConInHandle = gST->ConsoleInHandle;
SystemTableInfo->ConOut = gST->ConOut;
SystemTableInfo->ConOutHandle = gST->ConsoleOutHandle;
SystemTableInfo->ConErr = gST->StdErr;
SystemTableInfo->ConErrHandle = gST->StandardErrorHandle;
*OldStdIn = ShellParameters->StdIn;
*OldStdOut = ShellParameters->StdOut;
*OldStdErr = ShellParameters->StdErr;
if (NewCommandLine == NULL) {
return (EFI_SUCCESS);
}
CommandLineCopy = StrnCatGrow(&CommandLineCopy, NULL, NewCommandLine, 0);
if (CommandLineCopy == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
Status = EFI_SUCCESS;
Split = NULL;
FirstLocation = CommandLineCopy + StrLen(CommandLineCopy);
StripQuotes(CommandLineCopy);
if (!IsListEmpty(&ShellInfoObject.SplitList.Link)) {
Split = (SPLIT_LIST*)GetFirstNode(&ShellInfoObject.SplitList.Link);
if (Split != NULL && Split->SplitStdIn != NULL) {
ShellParameters->StdIn = Split->SplitStdIn;
}
if (Split != NULL && Split->SplitStdOut != NULL) {
ShellParameters->StdOut = Split->SplitStdOut;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 2>>v ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 12, L' ');
StdErrVarName = CommandLineWalker += 6;
ErrAppend = TRUE;
if (StrStr(CommandLineWalker, L" 2>>v ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 1>>v ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 12, L' ');
StdOutVarName = CommandLineWalker += 6;
OutAppend = TRUE;
if (StrStr(CommandLineWalker, L" 1>>v ") != NULL) {
Status = EFI_NOT_FOUND;
}
} else if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" >>v ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 10, L' ');
StdOutVarName = CommandLineWalker += 5;
OutAppend = TRUE;
if (StrStr(CommandLineWalker, L" >>v ") != NULL) {
Status = EFI_NOT_FOUND;
}
} else if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" >v ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 8, L' ');
StdOutVarName = CommandLineWalker += 4;
OutAppend = FALSE;
if (StrStr(CommandLineWalker, L" >v ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 1>>a ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 12, L' ');
StdOutFileName = CommandLineWalker += 6;
OutAppend = TRUE;
OutUnicode = FALSE;
if (StrStr(CommandLineWalker, L" 1>>a ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 1>> ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 10, L' ');
if (StdOutFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdOutFileName = CommandLineWalker += 5;
OutAppend = TRUE;
}
if (StrStr(CommandLineWalker, L" 1>> ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" >> ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 8, L' ');
if (StdOutFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdOutFileName = CommandLineWalker += 4;
OutAppend = TRUE;
}
if (StrStr(CommandLineWalker, L" >> ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" >>a ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 10, L' ');
if (StdOutFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdOutFileName = CommandLineWalker += 5;
OutAppend = TRUE;
OutUnicode = FALSE;
}
if (StrStr(CommandLineWalker, L" >>a ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 1>a ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 10, L' ');
if (StdOutFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdOutFileName = CommandLineWalker += 5;
OutAppend = FALSE;
OutUnicode = FALSE;
}
if (StrStr(CommandLineWalker, L" 1>a ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" >a ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 8, L' ');
if (StdOutFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdOutFileName = CommandLineWalker += 4;
OutAppend = FALSE;
OutUnicode = FALSE;
}
if (StrStr(CommandLineWalker, L" >a ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 2>> ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 10, L' ');
if (StdErrFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdErrFileName = CommandLineWalker += 5;
ErrAppend = TRUE;
}
if (StrStr(CommandLineWalker, L" 2>> ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 2>v ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 10, L' ');
if (StdErrVarName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdErrVarName = CommandLineWalker += 5;
ErrAppend = FALSE;
}
if (StrStr(CommandLineWalker, L" 2>v ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 1>v ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 10, L' ');
if (StdOutVarName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdOutVarName = CommandLineWalker += 5;
OutAppend = FALSE;
}
if (StrStr(CommandLineWalker, L" 1>v ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 2>a ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 10, L' ');
if (StdErrFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdErrFileName = CommandLineWalker += 5;
ErrAppend = FALSE;
ErrUnicode = FALSE;
}
if (StrStr(CommandLineWalker, L" 2>a ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 2> ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 8, L' ');
if (StdErrFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdErrFileName = CommandLineWalker += 4;
ErrAppend = FALSE;
}
if (StrStr(CommandLineWalker, L" 2> ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" 1> ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 8, L' ');
if (StdOutFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdOutFileName = CommandLineWalker += 4;
OutAppend = FALSE;
}
if (StrStr(CommandLineWalker, L" 1> ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" > ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 6, L' ');
if (StdOutFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdOutFileName = CommandLineWalker += 3;
OutAppend = FALSE;
}
if (StrStr(CommandLineWalker, L" > ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" < ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 6, L' ');
if (StdInFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdInFileName = CommandLineWalker += 3;
}
if (StrStr(CommandLineWalker, L" < ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" <a ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 8, L' ');
if (StdInFileName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdInFileName = CommandLineWalker += 4;
InUnicode = FALSE;
}
if (StrStr(CommandLineWalker, L" <a ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (!EFI_ERROR(Status) && (CommandLineWalker = StrStr(CommandLineCopy, L" <v ")) != NULL) {
FirstLocation = MIN(CommandLineWalker, FirstLocation);
SetMem16(CommandLineWalker, 8, L' ');
if (StdInVarName != NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
StdInVarName = CommandLineWalker += 4;
}
if (StrStr(CommandLineWalker, L" <v ") != NULL) {
Status = EFI_NOT_FOUND;
}
}
if (FirstLocation != CommandLineCopy + StrLen(CommandLineCopy)
&& ((UINTN)(FirstLocation - CommandLineCopy) < StrLen(NewCommandLine))
){
*(NewCommandLine + (UINTN)(FirstLocation - CommandLineCopy)) = CHAR_NULL;
}
if (!EFI_ERROR(Status)) {
if (StdErrFileName != NULL && (CommandLineWalker = StrStr(StdErrFileName, L" ")) != NULL) {
CommandLineWalker[0] = CHAR_NULL;
}
if (StdOutFileName != NULL && (CommandLineWalker = StrStr(StdOutFileName, L" ")) != NULL) {
CommandLineWalker[0] = CHAR_NULL;
}
if (StdInFileName != NULL && (CommandLineWalker = StrStr(StdInFileName , L" ")) != NULL) {
CommandLineWalker[0] = CHAR_NULL;
}
if (StdErrVarName != NULL && (CommandLineWalker = StrStr(StdErrVarName , L" ")) != NULL) {
CommandLineWalker[0] = CHAR_NULL;
}
if (StdOutVarName != NULL && (CommandLineWalker = StrStr(StdOutVarName , L" ")) != NULL) {
CommandLineWalker[0] = CHAR_NULL;
}
if (StdInVarName != NULL && (CommandLineWalker = StrStr(StdInVarName , L" ")) != NULL) {
CommandLineWalker[0] = CHAR_NULL;
}
//
// Verify not the same and not duplicating something from a split
//
if (
//
// Check that no 2 filenames are the same
//
(StdErrFileName != NULL && StdOutFileName!= NULL && StringNoCaseCompare(&StdErrFileName, &StdOutFileName) == 0)
||(StdErrFileName != NULL && StdInFileName != NULL && StringNoCaseCompare(&StdErrFileName, &StdInFileName ) == 0)
||(StdOutFileName != NULL && StdInFileName != NULL && StringNoCaseCompare(&StdOutFileName, &StdInFileName ) == 0)
//
// Check that no 2 variable names are the same
//
||(StdErrVarName != NULL && StdInVarName != NULL && StringNoCaseCompare(&StdErrVarName , &StdInVarName ) == 0)
||(StdOutVarName != NULL && StdInVarName != NULL && StringNoCaseCompare(&StdOutVarName , &StdInVarName ) == 0)
||(StdErrVarName != NULL && StdOutVarName != NULL && StringNoCaseCompare(&StdErrVarName , &StdOutVarName ) == 0)
//
// When a split (using | operator) is in place some are not allowed
//
||(Split != NULL && Split->SplitStdIn != NULL && (StdInVarName != NULL || StdInFileName != NULL))
||(Split != NULL && Split->SplitStdOut != NULL && (StdOutVarName != NULL || StdOutFileName != NULL))
//
// Check that nothing is trying to be output to 2 locations.
//
||(StdErrFileName != NULL && StdErrVarName != NULL)
||(StdOutFileName != NULL && StdOutVarName != NULL)
||(StdInFileName != NULL && StdInVarName != NULL)
//
// Check for no volatile environment variables
//
||(StdErrVarName != NULL && !IsVolatileEnv(StdErrVarName))
||(StdOutVarName != NULL && !IsVolatileEnv(StdOutVarName))
//
// Cant redirect during a reconnect operation.
//
||(StrStr(NewCommandLine, L"connect -r") != NULL
&& (StdOutVarName != NULL || StdOutFileName != NULL || StdErrFileName != NULL || StdErrVarName != NULL))
//
// Check that filetypes (Unicode/Ascii) do not change during an append
//
||(StdOutFileName != NULL && OutUnicode && OutAppend && (!EFI_ERROR(ShellFileExists(StdOutFileName)) && EFI_ERROR(IsUnicodeFile(StdOutFileName))))
||(StdErrFileName != NULL && ErrUnicode && ErrAppend && (!EFI_ERROR(ShellFileExists(StdErrFileName)) && EFI_ERROR(IsUnicodeFile(StdErrFileName))))
||(StdOutFileName != NULL && !OutUnicode && OutAppend && (!EFI_ERROR(ShellFileExists(StdOutFileName)) && !EFI_ERROR(IsUnicodeFile(StdOutFileName))))
||(StdErrFileName != NULL && !ErrUnicode && ErrAppend && (!EFI_ERROR(ShellFileExists(StdErrFileName)) && !EFI_ERROR(IsUnicodeFile(StdErrFileName))))
){
Status = EFI_INVALID_PARAMETER;
ShellParameters->StdIn = *OldStdIn;
ShellParameters->StdOut = *OldStdOut;
ShellParameters->StdErr = *OldStdErr;
} else if (!EFI_ERROR(Status)){
//
// Open the Std<Whatever> and we should not have conflicts here...
//
//
// StdErr to a file
//
if (StdErrFileName != NULL) {
if (!ErrAppend) {
//
// delete existing file.
//
ShellInfoObject.NewEfiShellProtocol->DeleteFileByName(StdErrFileName);
}
Status = ShellOpenFileByName(StdErrFileName, &TempHandle, EFI_FILE_MODE_WRITE|EFI_FILE_MODE_READ|EFI_FILE_MODE_CREATE,0);
if (!ErrAppend && ErrUnicode && !EFI_ERROR(Status)) {
//
// Write out the gUnicodeFileTag
//
Size = sizeof(CHAR16);
TagBuffer[0] = gUnicodeFileTag;
TagBuffer[1] = CHAR_NULL;
ShellInfoObject.NewEfiShellProtocol->WriteFile(TempHandle, &Size, TagBuffer);
}
if (!ErrUnicode && !EFI_ERROR(Status)) {
TempHandle = CreateFileInterfaceFile(TempHandle, FALSE);
ASSERT(TempHandle != NULL);
}
if (!EFI_ERROR(Status)) {
ShellParameters->StdErr = TempHandle;
gST->StdErr = CreateSimpleTextOutOnFile(TempHandle, &gST->StandardErrorHandle);
}
}
//
// StdOut to a file
//
if (!EFI_ERROR(Status) && StdOutFileName != NULL) {
if (!OutAppend) {
//
// delete existing file.
//
ShellInfoObject.NewEfiShellProtocol->DeleteFileByName(StdOutFileName);
}
Status = ShellOpenFileByName(StdOutFileName, &TempHandle, EFI_FILE_MODE_WRITE|EFI_FILE_MODE_READ|EFI_FILE_MODE_CREATE,0);
if (TempHandle == NULL) {
Status = EFI_INVALID_PARAMETER;
} else {
if (StrStr(StdOutFileName, L"NUL")==StdOutFileName) {
//no-op
} else if (!OutAppend && OutUnicode && !EFI_ERROR(Status)) {
//
// Write out the gUnicodeFileTag
//
Size = sizeof(CHAR16);
TagBuffer[0] = gUnicodeFileTag;
TagBuffer[1] = CHAR_NULL;
ShellInfoObject.NewEfiShellProtocol->WriteFile(TempHandle, &Size, TagBuffer);
} else if (OutAppend) {
//
// Move to end of file
//
Status = ShellInfoObject.NewEfiShellProtocol->GetFileSize(TempHandle, &FileSize);
if (!EFI_ERROR(Status)) {
Status = ShellInfoObject.NewEfiShellProtocol->SetFilePosition(TempHandle, FileSize);
}
}
if (!OutUnicode && !EFI_ERROR(Status)) {
TempHandle = CreateFileInterfaceFile(TempHandle, FALSE);
ASSERT(TempHandle != NULL);
}
if (!EFI_ERROR(Status)) {
ShellParameters->StdOut = TempHandle;
gST->ConOut = CreateSimpleTextOutOnFile(TempHandle, &gST->ConsoleOutHandle);
}
}
}
//
// StdOut to a var
//
if (!EFI_ERROR(Status) && StdOutVarName != NULL) {
if (!OutAppend) {
//
// delete existing variable.
//
SHELL_SET_ENVIRONMENT_VARIABLE_V(StdOutVarName, 0, L"");
}
TempHandle = CreateFileInterfaceEnv(StdOutVarName);
ASSERT(TempHandle != NULL);
ShellParameters->StdOut = TempHandle;
gST->ConOut = CreateSimpleTextOutOnFile(TempHandle, &gST->ConsoleOutHandle);
}
//
// StdErr to a var
//
if (!EFI_ERROR(Status) && StdErrVarName != NULL) {
if (!ErrAppend) {
//
// delete existing variable.
//
SHELL_SET_ENVIRONMENT_VARIABLE_V(StdErrVarName, 0, L"");
}
TempHandle = CreateFileInterfaceEnv(StdErrVarName);
ASSERT(TempHandle != NULL);
ShellParameters->StdErr = TempHandle;
gST->StdErr = CreateSimpleTextOutOnFile(TempHandle, &gST->StandardErrorHandle);
}
//
// StdIn from a var
//
if (!EFI_ERROR(Status) && StdInVarName != NULL) {
TempHandle = CreateFileInterfaceEnv(StdInVarName);
if (TempHandle == NULL) {
Status = EFI_OUT_OF_RESOURCES;
} else {
if (!InUnicode) {
TempHandle = CreateFileInterfaceFile(TempHandle, FALSE);
}
Size = 0;
if (TempHandle != NULL || ((EFI_FILE_PROTOCOL*)TempHandle)->Read(TempHandle, &Size, NULL) != EFI_BUFFER_TOO_SMALL) {
Status = EFI_INVALID_PARAMETER;
} else {
ShellParameters->StdIn = TempHandle;
gST->ConIn = CreateSimpleTextInOnFile(TempHandle, &gST->ConsoleInHandle);
}
}
}
//
// StdIn from a file
//
if (!EFI_ERROR(Status) && StdInFileName != NULL) {
Status = ShellOpenFileByName(
StdInFileName,
&TempHandle,
EFI_FILE_MODE_READ,
0);
if (!InUnicode && !EFI_ERROR(Status)) {
TempHandle = CreateFileInterfaceFile(TempHandle, FALSE);
}
if (!EFI_ERROR(Status)) {
ShellParameters->StdIn = TempHandle;
gST->ConIn = CreateSimpleTextInOnFile(TempHandle, &gST->ConsoleInHandle);
}
}
}
}
FreePool(CommandLineCopy);
CalculateEfiHdrCrc(&gST->Hdr);
if (gST->ConIn == NULL ||gST->ConOut == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
return (Status);
}
/**
Funcion will replace the current StdIn and StdOut in the ShellParameters protocol
structure with StdIn and StdOut. The current values are de-allocated.
@param[in, out] ShellParameters Pointer to parameter structure to modify.
@param[in] OldStdIn Pointer to old StdIn.
@param[in] OldStdOut Pointer to old StdOut.
@param[in] OldStdErr Pointer to old StdErr.
@param[in] SystemTableInfo Pointer to old system table information.
**/
EFI_STATUS
EFIAPI
RestoreStdInStdOutStdErr (
IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *ShellParameters,
IN SHELL_FILE_HANDLE *OldStdIn,
IN SHELL_FILE_HANDLE *OldStdOut,
IN SHELL_FILE_HANDLE *OldStdErr,
IN SYSTEM_TABLE_INFO *SystemTableInfo
)
{
SPLIT_LIST *Split;
if (ShellParameters == NULL
||OldStdIn == NULL
||OldStdOut == NULL
||OldStdErr == NULL
||SystemTableInfo == NULL) {
return (EFI_INVALID_PARAMETER);
}
if (!IsListEmpty(&ShellInfoObject.SplitList.Link)) {
Split = (SPLIT_LIST*)GetFirstNode(&ShellInfoObject.SplitList.Link);
} else {
Split = NULL;
}
if (ShellParameters->StdIn != *OldStdIn) {
if ((Split != NULL && Split->SplitStdIn != ShellParameters->StdIn) || Split == NULL) {
gEfiShellProtocol->CloseFile(ShellParameters->StdIn);
}
ShellParameters->StdIn = *OldStdIn;
}
if (ShellParameters->StdOut != *OldStdOut) {
if ((Split != NULL && Split->SplitStdOut != ShellParameters->StdOut) || Split == NULL) {
gEfiShellProtocol->CloseFile(ShellParameters->StdOut);
}
ShellParameters->StdOut = *OldStdOut;
}
if (ShellParameters->StdErr != *OldStdErr) {
gEfiShellProtocol->CloseFile(ShellParameters->StdErr);
ShellParameters->StdErr = *OldStdErr;
}
if (gST->ConIn != SystemTableInfo->ConIn) {
CloseSimpleTextInOnFile(gST->ConIn);
gST->ConIn = SystemTableInfo->ConIn;
gST->ConsoleInHandle = SystemTableInfo->ConInHandle;
}
if (gST->ConOut != SystemTableInfo->ConOut) {
CloseSimpleTextOutOnFile(gST->ConOut);
gST->ConOut = SystemTableInfo->ConOut;
gST->ConsoleOutHandle = SystemTableInfo->ConOutHandle;
}
if (gST->StdErr != SystemTableInfo->ConErr) {
CloseSimpleTextOutOnFile(gST->StdErr);
gST->StdErr = SystemTableInfo->ConErr;
gST->StandardErrorHandle = SystemTableInfo->ConErrHandle;
}
CalculateEfiHdrCrc(&gST->Hdr);
return (EFI_SUCCESS);
}
/**
Funcion will replace the current Argc and Argv in the ShellParameters protocol
structure by parsing NewCommandLine. The current values are returned to the
user.
If OldArgv or OldArgc is NULL then that value is not returned.
@param[in, out] ShellParameters Pointer to parameter structure to modify.
@param[in] NewCommandLine The new command line to parse and use.
@param[out] OldArgv Pointer to old list of parameters.
@param[out] OldArgc Pointer to old number of items in Argv list.
@retval EFI_SUCCESS Operation was sucessful, Argv and Argc are valid.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
**/
EFI_STATUS
EFIAPI
UpdateArgcArgv(
IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *ShellParameters,
IN CONST CHAR16 *NewCommandLine,
OUT CHAR16 ***OldArgv OPTIONAL,
OUT UINTN *OldArgc OPTIONAL
)
{
ASSERT(ShellParameters != NULL);
if (OldArgc != NULL) {
*OldArgc = ShellParameters->Argc;
}
if (OldArgc != NULL) {
*OldArgv = ShellParameters->Argv;
}
return (ParseCommandLineToArgs(NewCommandLine, &(ShellParameters->Argv), &(ShellParameters->Argc)));
}
/**
Funcion will replace the current Argc and Argv in the ShellParameters protocol
structure with Argv and Argc. The current values are de-allocated and the
OldArgv must not be deallocated by the caller.
@param[in, out] ShellParameters pointer to parameter structure to modify
@param[in] OldArgv pointer to old list of parameters
@param[in] OldArgc pointer to old number of items in Argv list
**/
VOID
EFIAPI
RestoreArgcArgv(
IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *ShellParameters,
IN CHAR16 ***OldArgv,
IN UINTN *OldArgc
)
{
UINTN LoopCounter;
ASSERT(ShellParameters != NULL);
ASSERT(OldArgv != NULL);
ASSERT(OldArgc != NULL);
if (ShellParameters->Argv != NULL) {
for ( LoopCounter = 0
; LoopCounter < ShellParameters->Argc
; LoopCounter++
){
FreePool(ShellParameters->Argv[LoopCounter]);
}
FreePool(ShellParameters->Argv);
}
ShellParameters->Argv = *OldArgv;
*OldArgv = NULL;
ShellParameters->Argc = *OldArgc;
*OldArgc = 0;
}
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