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ShellPkg: Refactor the RunCommand API

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This almost completely splits the RunCommand API into sub-routines.

 - the ProcessCommandLineToFinal API handles replacing the a found alias and any found environment variables.  This will redirect "-?" to "help", if necessary.  Upon return, the command line is complete and finalized.  It may still have redirection in it, and those will get chopped off later (but no further modifications occur).
 - the SetupAndRunCommandOrFile API handles updating and then later restoring StdIn, StdOut, and StdErr (and removing their information from the command line).  It will call into RunCommandOrFile.
 - the RunCommandOrFile API divides the logic to RunInternalCommand, RunScriptFile, or running an .EFI file directly.
 - the RunInternalCommand API handles updating and then restoring Argc and Argv.  It will run the internal command in between.
 - the SetLastError API handles updating of the environment variable "lasterror"
 - the DoHelpUpdateArgcArgv was changed to DoHelpUpdate and now works on the raw command line and not the argc/argv.  This allows the processing to be moved earlier.

Note this change has the following positive side effects (this eliminates unnecessary step):
 - Argc/Argv are only updated for internal commands (as they are library based)
 - no Argv/Argc/StdIn/StdOut/StdErr processing is done for file system changes.
 - The ProcessCommandLineToFinal API exists and it's critical to the ability to correctly pre-process split ("|") command lines ahead of time to verify their correctness.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15007 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Jaben Carsey
2013-12-19 16:05:34 +00:00
committed by jcarsey
parent 8dcd84b9d7
commit 806c49db05
1 changed files with 377 additions and 210 deletions
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589
ShellPkg/Application/Shell/Shell.c
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@@ -1674,52 +1674,355 @@ ChangeMappedDrive(
if found, will add "help" as argv[0], and move the rest later. if found, will add "help" as argv[0], and move the rest later.
@param[in,out] Argc The pointer to argc to update @param[in,out] CmdLine pointer to the command line to update
@param[in,out] Argv The pointer to argv to update (this is a pointer to an array of string pointers)
**/ **/
EFI_STATUS EFI_STATUS
EFIAPI EFIAPI
DoHelpUpdateArgcArgv( DoHelpUpdate(
IN OUT UINTN *Argc, IN OUT CHAR16 **CmdLine
IN OUT CHAR16 ***Argv
) )
{ {
UINTN Count; CHAR16 *CurrentParameter;
UINTN Count2; CHAR16 *Walker;
// CHAR16 *LastWalker;
// Check each parameter CHAR16 *NewCommandLine;
// EFI_STATUS Status;
for (Count = 0 ; Count < (*Argc) ; Count++) {
// Status = EFI_SUCCESS;
// if it's "-?" or if the first parameter is "?"
// CurrentParameter = AllocateZeroPool(StrSize(*CmdLine));
if (StrStr((*Argv)[Count], L"-?") == (*Argv)[Count] if (CurrentParameter == NULL) {
|| ((*Argv)[0][0] == L'?' && (*Argv)[0][1] == CHAR_NULL) return (EFI_OUT_OF_RESOURCES);
) { }
//
// We need to redo the arguments since a parameter was -? Walker = *CmdLine;
// move them all down 1 to the end, then up one then replace the first with help while(Walker != NULL && *Walker != CHAR_NULL) {
// LastWalker = Walker;
FreePool((*Argv)[Count]); GetNextParameter(&Walker, &CurrentParameter);
(*Argv)[Count] = NULL; if (StrStr(CurrentParameter, L"-?") == CurrentParameter) {
for (Count2 = Count ; (Count2 + 1) < (*Argc) ; Count2++) { LastWalker[0] = L' ';
(*Argv)[Count2] = (*Argv)[Count2+1]; LastWalker[1] = L' ';
} NewCommandLine = AllocateZeroPool(StrSize(L"help ") + StrSize(*CmdLine));
(*Argv)[Count2] = NULL; if (NewCommandLine == NULL) {
for (Count2 = (*Argc) -1 ; Count2 > 0 ; Count2--) { Status = EFI_OUT_OF_RESOURCES;
(*Argv)[Count2] = (*Argv)[Count2-1]; break;
}
(*Argv)[0] = NULL;
(*Argv)[0] = StrnCatGrow(&(*Argv)[0], NULL, L"help", 0);
if ((*Argv)[0] == NULL) {
return (EFI_OUT_OF_RESOURCES);
} }
StrCpy(NewCommandLine, L"help ");
StrCat(NewCommandLine, *CmdLine);
SHELL_FREE_NON_NULL(*CmdLine);
*CmdLine = NewCommandLine;
break; break;
} }
} }
SHELL_FREE_NON_NULL(CurrentParameter);
return (Status);
}
/**
Function to update the shell variable "lasterror"
@param[in] ErrorCode the error code to put into lasterror
**/
EFI_STATUS
EFIAPI
SetLastError(
IN CONST UINT64 ErrorCode
)
{
CHAR16 LeString[19];
if (sizeof(EFI_STATUS) == sizeof(UINT64)) {
UnicodeSPrint(LeString, sizeof(LeString), L"0x%Lx", ErrorCode);
} else {
UnicodeSPrint(LeString, sizeof(LeString), L"0x%x", ErrorCode);
}
DEBUG_CODE(InternalEfiShellSetEnv(L"debuglasterror", LeString, TRUE););
InternalEfiShellSetEnv(L"lasterror", LeString, TRUE);
return (EFI_SUCCESS); return (EFI_SUCCESS);
} }
/**
Converts the command line to it's post-processed form. this replaces variables and alias' per UEFI Shell spec.
@param[in,out] CmdLine pointer to the command line to update
@retval EFI_SUCCESS The operation was successful
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
@return some other error occured
**/
EFI_STATUS
EFIAPI
ProcessCommandLineAliasVariable(
IN OUT CHAR16 **CmdLine
)
{
EFI_STATUS Status;
TrimSpaces(CmdLine);
Status = ShellSubstituteAliases(CmdLine);
if (EFI_ERROR(Status)) {
return (Status);
}
TrimSpaces(CmdLine);
Status = ShellSubstituteVariables(CmdLine);
if (EFI_ERROR(Status)) {
return (Status);
}
TrimSpaces(CmdLine);
//
// update for help parsing
//
if (StrStr(*CmdLine, L"?") != NULL) {
//
// This may do nothing if the ? does not indicate help.
// Save all the details for in the API below.
//
Status = DoHelpUpdate(CmdLine);
}
TrimSpaces(CmdLine);
return (EFI_SUCCESS);
}
/**
Run an internal shell command.
This API will upadate the shell's environment since these commands are libraries.
@param[in] CmdLine the command line to run.
@param[in] FirstParameter the first parameter on the command line
@param[in] ParamProtocol the shell parameters protocol pointer
@retval EFI_SUCCESS The command was completed.
@retval EFI_ABORTED The command's operation was aborted.
**/
EFI_STATUS
EFIAPI
RunInternalCommand(
IN CONST CHAR16 *CmdLine,
IN CHAR16 *FirstParameter,
IN EFI_SHELL_PARAMETERS_PROTOCOL *ParamProtocol
)
{
EFI_STATUS Status;
UINTN Argc;
CHAR16 **Argv;
SHELL_STATUS CommandReturnedStatus;
BOOLEAN LastError;
//
// get the argc and argv updated for internal commands
//
Status = UpdateArgcArgv(ParamProtocol, CmdLine, &Argv, &Argc);
if (!EFI_ERROR(Status)) {
//
// Run the internal command.
//
Status = ShellCommandRunCommandHandler(FirstParameter, &CommandReturnedStatus, &LastError);
if (!EFI_ERROR(Status)) {
//
// Update last error status.
// some commands do not update last error.
//
if (LastError) {
SetLastError(CommandReturnedStatus);
}
//
// Pass thru the exitcode from the app.
//
if (ShellCommandGetExit()) {
Status = CommandReturnedStatus;
} else if (CommandReturnedStatus != 0 && IsScriptOnlyCommand(FirstParameter)) {
Status = EFI_ABORTED;
}
}
}
//
// This is guarenteed to be called after UpdateArgcArgv no matter what else happened.
// This is safe even if the update API failed. In this case, it may be a no-op.
//
RestoreArgcArgv(ParamProtocol, &Argv, &Argc);
if (ShellCommandGetCurrentScriptFile() != NULL && !IsScriptOnlyCommand(FirstParameter)) {
//
// if this is NOT a scipt only command return success so the script won't quit.
// prevent killing the script - this is the only place where we know the actual command name (after alias and variable replacement...)
//
Status = EFI_SUCCESS;
}
return (Status);
}
/**
Function to run the command or file.
@param[in] Type the type of operation being run.
@param[in] CmdLine the command line to run.
@param[in] FirstParameter the first parameter on the command line
@param[in] ParamProtocol the shell parameters protocol pointer
@retval EFI_SUCCESS The command was completed.
@retval EFI_ABORTED The command's operation was aborted.
**/
EFI_STATUS
EFIAPI
RunCommandOrFile(
IN SHELL_OPERATION_TYPES Type,
IN CONST CHAR16 *CmdLine,
IN CHAR16 *FirstParameter,
IN EFI_SHELL_PARAMETERS_PROTOCOL *ParamProtocol
)
{
EFI_STATUS Status;
EFI_STATUS StatusCode;
CHAR16 *CommandWithPath;
EFI_DEVICE_PATH_PROTOCOL *DevPath;
Status = EFI_SUCCESS;
CommandWithPath = NULL;
DevPath = NULL;
switch (Type) {
case INTERNAL_COMMAND:
Status = RunInternalCommand(CmdLine, FirstParameter, ParamProtocol);
break;
case SCRIPT_FILE_NAME:
case EFI_APPLICATION:
//
// Process a fully qualified path
//
if (StrStr(FirstParameter, L":") != NULL) {
ASSERT (CommandWithPath == NULL);
if (ShellIsFile(FirstParameter) == EFI_SUCCESS) {
CommandWithPath = StrnCatGrow(&CommandWithPath, NULL, FirstParameter, 0);
}
}
//
// Process a relative path and also check in the path environment variable
//
if (CommandWithPath == NULL) {
CommandWithPath = ShellFindFilePathEx(FirstParameter, mExecutableExtensions);
}
//
// This should be impossible now.
//
ASSERT(CommandWithPath != NULL);
//
// Make sure that path is not just a directory (or not found)
//
if (!EFI_ERROR(ShellIsDirectory(CommandWithPath))) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SHELL_NOT_FOUND), ShellInfoObject.HiiHandle, FirstParameter);
SetLastError(EFI_NOT_FOUND);
}
switch (Type) {
case SCRIPT_FILE_NAME:
Status = RunScriptFile (CommandWithPath);
break;
case EFI_APPLICATION:
//
// Get the device path of the application image
//
DevPath = ShellInfoObject.NewEfiShellProtocol->GetDevicePathFromFilePath(CommandWithPath);
if (DevPath == NULL){
Status = EFI_OUT_OF_RESOURCES;
break;
}
//
// Execute the device path
//
Status = InternalShellExecuteDevicePath(
&gImageHandle,
DevPath,
CmdLine,
NULL,
&StatusCode
);
SHELL_FREE_NON_NULL(DevPath);
//
// Update last error status.
//
SetLastError(StatusCode);
break;
}
break;
}
SHELL_FREE_NON_NULL(CommandWithPath);
return (Status);
}
/**
Function to setup StdIn, StdErr, StdOut, and then run the command or file.
@param[in] Type the type of operation being run.
@param[in] CmdLine the command line to run.
@param[in] FirstParameter the first parameter on the command line.
@param[in] ParamProtocol the shell parameters protocol pointer
@retval EFI_SUCCESS The command was completed.
@retval EFI_ABORTED The command's operation was aborted.
**/
EFI_STATUS
EFIAPI
SetupAndRunCommandOrFile(
IN SHELL_OPERATION_TYPES Type,
IN CHAR16 *CmdLine,
IN CHAR16 *FirstParameter,
IN EFI_SHELL_PARAMETERS_PROTOCOL *ParamProtocol
)
{
EFI_STATUS Status;
SHELL_FILE_HANDLE OriginalStdIn;
SHELL_FILE_HANDLE OriginalStdOut;
SHELL_FILE_HANDLE OriginalStdErr;
SYSTEM_TABLE_INFO OriginalSystemTableInfo;
//
// Update the StdIn, StdOut, and StdErr for redirection to environment variables, files, etc... unicode and ASCII
//
Status = UpdateStdInStdOutStdErr(ParamProtocol, CmdLine, &OriginalStdIn, &OriginalStdOut, &OriginalStdErr, &OriginalSystemTableInfo);
//
// The StdIn, StdOut, and StdErr are set up.
// Now run the command, script, or application
//
if (!EFI_ERROR(Status)) {
Status = RunCommandOrFile(Type, CmdLine, FirstParameter, ParamProtocol);
}
//
// Now print errors
//
if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SHELL_ERROR), ShellInfoObject.HiiHandle, (VOID*)(Status));
}
//
// put back the original StdIn, StdOut, and StdErr
//
RestoreStdInStdOutStdErr(ParamProtocol, &OriginalStdIn, &OriginalStdOut, &OriginalStdErr, &OriginalSystemTableInfo);
return (Status);
}
/** /**
Function will process and run a command line. Function will process and run a command line.
@@ -1738,31 +2041,16 @@ RunCommand(
) )
{ {
EFI_STATUS Status; EFI_STATUS Status;
EFI_STATUS StatusCode;
CHAR16 *CommandName;
SHELL_STATUS ShellStatus;
UINTN Argc;
CHAR16 **Argv;
BOOLEAN LastError;
CHAR16 LeString[19];
CHAR16 *CommandWithPath;
CONST EFI_DEVICE_PATH_PROTOCOL *DevPath;
CONST CHAR16 *TempLocation;
CONST CHAR16 *TempLocation2;
SHELL_FILE_HANDLE OriginalStdIn;
SHELL_FILE_HANDLE OriginalStdOut;
SHELL_FILE_HANDLE OriginalStdErr;
SYSTEM_TABLE_INFO OriginalSystemTableInfo;
CHAR16 *CleanOriginal; CHAR16 *CleanOriginal;
CHAR16 *FirstParameter;
CHAR16 *TempWalker;
SHELL_OPERATION_TYPES Type;
ASSERT(CmdLine != NULL); ASSERT(CmdLine != NULL);
if (StrLen(CmdLine) == 0) { if (StrLen(CmdLine) == 0) {
return (EFI_SUCCESS); return (EFI_SUCCESS);
} }
CommandName = NULL;
CommandWithPath = NULL;
DevPath = NULL;
Status = EFI_SUCCESS; Status = EFI_SUCCESS;
CleanOriginal = NULL; CleanOriginal = NULL;
@@ -1777,180 +2065,59 @@ RunCommand(
// Handle case that passed in command line is just 1 or more " " characters. // Handle case that passed in command line is just 1 or more " " characters.
// //
if (StrLen (CleanOriginal) == 0) { if (StrLen (CleanOriginal) == 0) {
if (CleanOriginal != NULL) { SHELL_FREE_NON_NULL(CleanOriginal);
FreePool(CleanOriginal);
CleanOriginal = NULL;
}
return (EFI_SUCCESS); return (EFI_SUCCESS);
} }
Status = ShellSubstituteAliases(&CleanOriginal); Status = ProcessCommandLineAliasVariable(&CleanOriginal);
if (EFI_ERROR(Status)) { if (EFI_ERROR(Status)) {
SHELL_FREE_NON_NULL(CleanOriginal);
return (Status); return (Status);
} }
Status = ShellSubstituteVariables(&CleanOriginal);
if (EFI_ERROR(Status)) {
return (Status);
}
TrimSpaces(&CleanOriginal);
// //
// We dont do normal processing with a split command line (output from one command input to another) // We dont do normal processing with a split command line (output from one command input to another)
// //
if (ContainsSplit(CleanOriginal)) { if (ContainsSplit(CleanOriginal)) {
Status = ProcessNewSplitCommandLine(CleanOriginal); Status = ProcessNewSplitCommandLine(CleanOriginal);
} else { SHELL_FREE_NON_NULL(CleanOriginal);
// return (Status);
// If this is a mapped drive change handle that... }
//
if (CleanOriginal[(StrLen(CleanOriginal)-1)] == L':' && StrStr(CleanOriginal, L" ") == NULL) { //
Status = ChangeMappedDrive(CleanOriginal); // We need the first parameter information so we can determine the operation type
SHELL_FREE_NON_NULL(CleanOriginal); //
return (Status); FirstParameter = AllocateZeroPool(StrSize(CleanOriginal));
} if (FirstParameter == NULL) {
SHELL_FREE_NON_NULL(CleanOriginal);
return (EFI_OUT_OF_RESOURCES);
///@todo update this section to divide into 3 ways - run internal command, run split (above), and run an external file... }
/// We waste a lot of time doing processing like StdIn,StdOut,Argv,Argc for things that are external files... TempWalker = CleanOriginal;
GetNextParameter(&TempWalker, &FirstParameter);
//
Status = UpdateStdInStdOutStdErr(ShellInfoObject.NewShellParametersProtocol, CleanOriginal, &OriginalStdIn, &OriginalStdOut, &OriginalStdErr, &OriginalSystemTableInfo); // Depending on the first parameter we change the behavior
if (EFI_ERROR(Status)) { //
if (Status == EFI_NOT_FOUND) { switch (Type = GetOperationType(FirstParameter)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SHELL_REDUNDA_REDIR), ShellInfoObject.HiiHandle); case FILE_SYS_CHANGE:
} else { Status = ChangeMappedDrive(CleanOriginal);
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SHELL_INVALID_REDIR), ShellInfoObject.HiiHandle); break;
} case INTERNAL_COMMAND:
} else { case SCRIPT_FILE_NAME:
TrimSpaces(&CleanOriginal); case EFI_APPLICATION:
Status = SetupAndRunCommandOrFile(Type, CleanOriginal, FirstParameter, ShellInfoObject.NewShellParametersProtocol);
// break;
// get the argc and argv updated for internal commands default:
// //
Status = UpdateArgcArgv(ShellInfoObject.NewShellParametersProtocol, CleanOriginal, &Argv, &Argc); // Whatever was typed, it was invalid.
ASSERT_EFI_ERROR(Status); //
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SHELL_NOT_FOUND), ShellInfoObject.HiiHandle, FirstParameter);
if (StrStr(CleanOriginal, L"?") != NULL) { SetLastError(EFI_NOT_FOUND);
Status = DoHelpUpdateArgcArgv( break;
&ShellInfoObject.NewShellParametersProtocol->Argc,
&ShellInfoObject.NewShellParametersProtocol->Argv);
}
//
// command or file?
//
if (ShellCommandIsCommandOnList(ShellInfoObject.NewShellParametersProtocol->Argv[0])) {
//
// Run the command (which was converted if it was an alias)
//
if (!EFI_ERROR(Status)) {
Status = ShellCommandRunCommandHandler(ShellInfoObject.NewShellParametersProtocol->Argv[0], &ShellStatus, &LastError);
ASSERT_EFI_ERROR(Status);
if (sizeof(EFI_STATUS) == sizeof(UINT64)) {
UnicodeSPrint(LeString, sizeof(LeString), L"0x%Lx", ShellStatus);
} else {
UnicodeSPrint(LeString, sizeof(LeString), L"0x%x", ShellStatus);
}
DEBUG_CODE(InternalEfiShellSetEnv(L"debuglasterror", LeString, TRUE););
if (LastError) {
InternalEfiShellSetEnv(L"lasterror", LeString, TRUE);
}
//
// Pass thru the exitcode from the app.
//
if (ShellCommandGetExit()) {
Status = ShellStatus;
} else if (ShellStatus != 0 && IsScriptOnlyCommand(ShellInfoObject.NewShellParametersProtocol->Argv[0])) {
Status = EFI_ABORTED;
}
}
} else {
//
// run an external file (or script)
//
if (StrStr(ShellInfoObject.NewShellParametersProtocol->Argv[0], L":") != NULL) {
ASSERT (CommandWithPath == NULL);
if (ShellIsFile(ShellInfoObject.NewShellParametersProtocol->Argv[0]) == EFI_SUCCESS) {
CommandWithPath = StrnCatGrow(&CommandWithPath, NULL, ShellInfoObject.NewShellParametersProtocol->Argv[0], 0);
}
}
if (CommandWithPath == NULL) {
CommandWithPath = ShellFindFilePathEx(ShellInfoObject.NewShellParametersProtocol->Argv[0], mExecutableExtensions);
}
if (CommandWithPath == NULL || ShellIsDirectory(CommandWithPath) == EFI_SUCCESS) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SHELL_NOT_FOUND), ShellInfoObject.HiiHandle, ShellInfoObject.NewShellParametersProtocol->Argv[0]);
if (sizeof(EFI_STATUS) == sizeof(UINT64)) {
UnicodeSPrint(LeString, sizeof(LeString), L"0x%Lx", EFI_NOT_FOUND);
} else {
UnicodeSPrint(LeString, sizeof(LeString), L"0x%x", EFI_NOT_FOUND);
}
DEBUG_CODE(InternalEfiShellSetEnv(L"debuglasterror", LeString, TRUE););
InternalEfiShellSetEnv(L"lasterror", LeString, TRUE);
} else {
//
// Check if it's a NSH (script) file.
//
TempLocation = CommandWithPath+StrLen(CommandWithPath)-4;
TempLocation2 = mScriptExtension;
if ((StrLen(CommandWithPath) > 4) && (StringNoCaseCompare((VOID*)(&TempLocation), (VOID*)(&TempLocation2)) == 0)) {
Status = RunScriptFile (CommandWithPath);
} else {
DevPath = ShellInfoObject.NewEfiShellProtocol->GetDevicePathFromFilePath(CommandWithPath);
ASSERT(DevPath != NULL);
Status = InternalShellExecuteDevicePath(
&gImageHandle,
DevPath,
CleanOriginal,
NULL,
&StatusCode
);
//
// Update last error status.
//
if (sizeof(EFI_STATUS) == sizeof(UINT64)) {
UnicodeSPrint(LeString, sizeof(LeString), L"0x%Lx", StatusCode);
} else {
UnicodeSPrint(LeString, sizeof(LeString), L"0x%x", StatusCode);
}
DEBUG_CODE(InternalEfiShellSetEnv(L"debuglasterror", LeString, TRUE););
InternalEfiShellSetEnv(L"lasterror", LeString, TRUE);
}
}
}
//
// Print some error info.
//
if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SHELL_ERROR), ShellInfoObject.HiiHandle, (VOID*)(Status));
}
CommandName = StrnCatGrow(&CommandName, NULL, ShellInfoObject.NewShellParametersProtocol->Argv[0], 0);
RestoreArgcArgv(ShellInfoObject.NewShellParametersProtocol, &Argv, &Argc);
RestoreStdInStdOutStdErr(ShellInfoObject.NewShellParametersProtocol, &OriginalStdIn, &OriginalStdOut, &OriginalStdErr, &OriginalSystemTableInfo);
}
if (CommandName != NULL) {
if (ShellCommandGetCurrentScriptFile() != NULL && !IsScriptOnlyCommand(CommandName)) {
//
// if this is NOT a scipt only command return success so the script won't quit.
// prevent killing the script - this is the only place where we know the actual command name (after alias and variable replacement...)
//
Status = EFI_SUCCESS;
}
}
} }
SHELL_FREE_NON_NULL(CommandName);
SHELL_FREE_NON_NULL(CommandWithPath);
SHELL_FREE_NON_NULL(CleanOriginal); SHELL_FREE_NON_NULL(CleanOriginal);
SHELL_FREE_NON_NULL(FirstParameter);
return (Status); return (Status);
} }