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system76-edk2/ShellPkg/Library/UefiShellLib/UefiShellLib.c
darylm503 b0934ac4b0 ShellPkg: Update comments for functions to clarify buffer origin. 
Signed-off-by: darylm503
Reviewed-by: jljusten



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12687 6f19259b-4bc3-4df7-8a09-765794883524
2011-11-12 00:35:11 +00:00

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124 KiB
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/** @file
Provides interface to shell functionality for shell commands and applications.
Copyright (c) 2006 - 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 "UefiShellLib.h"
#include <ShellBase.h>
#include <Library/SortLib.h>
#define FIND_XXXXX_FILE_BUFFER_SIZE (SIZE_OF_EFI_FILE_INFO + MAX_FILE_NAME_LEN)
//
// globals...
//
SHELL_PARAM_ITEM EmptyParamList[] = {
{NULL, TypeMax}
};
SHELL_PARAM_ITEM SfoParamList[] = {
{L"-sfo", TypeFlag},
{NULL, TypeMax}
};
EFI_SHELL_ENVIRONMENT2 *mEfiShellEnvironment2;
EFI_SHELL_INTERFACE *mEfiShellInterface;
EFI_SHELL_PROTOCOL *gEfiShellProtocol;
EFI_SHELL_PARAMETERS_PROTOCOL *gEfiShellParametersProtocol;
EFI_HANDLE mEfiShellEnvironment2Handle;
FILE_HANDLE_FUNCTION_MAP FileFunctionMap;
/**
Check if a Unicode character is a hexadecimal character.
This internal function checks if a Unicode character is a
numeric character. The valid hexadecimal characters are
L'0' to L'9', L'a' to L'f', or L'A' to L'F'.
@param Char The character to check against.
@retval TRUE If the Char is a hexadecmial character.
@retval FALSE If the Char is not a hexadecmial character.
**/
BOOLEAN
EFIAPI
ShellIsHexaDecimalDigitCharacter (
IN CHAR16 Char
)
{
return (BOOLEAN) ((Char >= L'0' && Char <= L'9') || (Char >= L'A' && Char <= L'F') || (Char >= L'a' && Char <= L'f'));
}
/**
Check if a Unicode character is a decimal character.
This internal function checks if a Unicode character is a
decimal character. The valid characters are
L'0' to L'9'.
@param Char The character to check against.
@retval TRUE If the Char is a hexadecmial character.
@retval FALSE If the Char is not a hexadecmial character.
**/
BOOLEAN
EFIAPI
ShellIsDecimalDigitCharacter (
IN CHAR16 Char
)
{
return (BOOLEAN) (Char >= L'0' && Char <= L'9');
}
/**
Helper function to find ShellEnvironment2 for constructor.
@param[in] ImageHandle A copy of the calling image's handle.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
**/
EFI_STATUS
EFIAPI
ShellFindSE2 (
IN EFI_HANDLE ImageHandle
)
{
EFI_STATUS Status;
EFI_HANDLE *Buffer;
UINTN BufferSize;
UINTN HandleIndex;
BufferSize = 0;
Buffer = NULL;
Status = gBS->OpenProtocol(ImageHandle,
&gEfiShellEnvironment2Guid,
(VOID **)&mEfiShellEnvironment2,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
//
// look for the mEfiShellEnvironment2 protocol at a higher level
//
if (EFI_ERROR (Status) || !(CompareGuid (&mEfiShellEnvironment2->SESGuid, &gEfiShellEnvironment2ExtGuid))){
//
// figure out how big of a buffer we need.
//
Status = gBS->LocateHandle (ByProtocol,
&gEfiShellEnvironment2Guid,
NULL, // ignored for ByProtocol
&BufferSize,
Buffer
);
//
// maybe it's not there???
//
if (Status == EFI_BUFFER_TOO_SMALL) {
Buffer = (EFI_HANDLE*)AllocateZeroPool(BufferSize);
if (Buffer == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
Status = gBS->LocateHandle (ByProtocol,
&gEfiShellEnvironment2Guid,
NULL, // ignored for ByProtocol
&BufferSize,
Buffer
);
}
if (!EFI_ERROR (Status) && Buffer != NULL) {
//
// now parse the list of returned handles
//
Status = EFI_NOT_FOUND;
for (HandleIndex = 0; HandleIndex < (BufferSize/sizeof(Buffer[0])); HandleIndex++) {
Status = gBS->OpenProtocol(Buffer[HandleIndex],
&gEfiShellEnvironment2Guid,
(VOID **)&mEfiShellEnvironment2,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (CompareGuid (&mEfiShellEnvironment2->SESGuid, &gEfiShellEnvironment2ExtGuid)) {
mEfiShellEnvironment2Handle = Buffer[HandleIndex];
Status = EFI_SUCCESS;
break;
}
}
}
}
if (Buffer != NULL) {
FreePool (Buffer);
}
return (Status);
}
/**
Function to do most of the work of the constructor. Allows for calling
multiple times without complete re-initialization.
@param[in] ImageHandle A copy of the ImageHandle.
@param[in] SystemTable A pointer to the SystemTable for the application.
@retval EFI_SUCCESS The operationw as successful.
**/
EFI_STATUS
EFIAPI
ShellLibConstructorWorker (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// UEFI 2.0 shell interfaces (used preferentially)
//
Status = gBS->OpenProtocol(
ImageHandle,
&gEfiShellProtocolGuid,
(VOID **)&gEfiShellProtocol,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR(Status)) {
//
// Search for the shell protocol
//
Status = gBS->LocateProtocol(
&gEfiShellProtocolGuid,
NULL,
(VOID **)&gEfiShellProtocol
);
if (EFI_ERROR(Status)) {
gEfiShellProtocol = NULL;
}
}
Status = gBS->OpenProtocol(
ImageHandle,
&gEfiShellParametersProtocolGuid,
(VOID **)&gEfiShellParametersProtocol,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR(Status)) {
gEfiShellParametersProtocol = NULL;
}
if (gEfiShellParametersProtocol == NULL || gEfiShellProtocol == NULL) {
//
// Moved to seperate function due to complexity
//
Status = ShellFindSE2(ImageHandle);
if (EFI_ERROR(Status)) {
DEBUG((DEBUG_ERROR, "Status: 0x%08x\r\n", Status));
mEfiShellEnvironment2 = NULL;
}
Status = gBS->OpenProtocol(ImageHandle,
&gEfiShellInterfaceGuid,
(VOID **)&mEfiShellInterface,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR(Status)) {
mEfiShellInterface = NULL;
}
}
//
// only success getting 2 of either the old or new, but no 1/2 and 1/2
//
if ((mEfiShellEnvironment2 != NULL && mEfiShellInterface != NULL) ||
(gEfiShellProtocol != NULL && gEfiShellParametersProtocol != NULL) ) {
if (gEfiShellProtocol != NULL) {
FileFunctionMap.GetFileInfo = gEfiShellProtocol->GetFileInfo;
FileFunctionMap.SetFileInfo = gEfiShellProtocol->SetFileInfo;
FileFunctionMap.ReadFile = gEfiShellProtocol->ReadFile;
FileFunctionMap.WriteFile = gEfiShellProtocol->WriteFile;
FileFunctionMap.CloseFile = gEfiShellProtocol->CloseFile;
FileFunctionMap.DeleteFile = gEfiShellProtocol->DeleteFile;
FileFunctionMap.GetFilePosition = gEfiShellProtocol->GetFilePosition;
FileFunctionMap.SetFilePosition = gEfiShellProtocol->SetFilePosition;
FileFunctionMap.FlushFile = gEfiShellProtocol->FlushFile;
FileFunctionMap.GetFileSize = gEfiShellProtocol->GetFileSize;
} else {
FileFunctionMap.GetFileInfo = (EFI_SHELL_GET_FILE_INFO)FileHandleGetInfo;
FileFunctionMap.SetFileInfo = (EFI_SHELL_SET_FILE_INFO)FileHandleSetInfo;
FileFunctionMap.ReadFile = (EFI_SHELL_READ_FILE)FileHandleRead;
FileFunctionMap.WriteFile = (EFI_SHELL_WRITE_FILE)FileHandleWrite;
FileFunctionMap.CloseFile = (EFI_SHELL_CLOSE_FILE)FileHandleClose;
FileFunctionMap.DeleteFile = (EFI_SHELL_DELETE_FILE)FileHandleDelete;
FileFunctionMap.GetFilePosition = (EFI_SHELL_GET_FILE_POSITION)FileHandleGetPosition;
FileFunctionMap.SetFilePosition = (EFI_SHELL_SET_FILE_POSITION)FileHandleSetPosition;
FileFunctionMap.FlushFile = (EFI_SHELL_FLUSH_FILE)FileHandleFlush;
FileFunctionMap.GetFileSize = (EFI_SHELL_GET_FILE_SIZE)FileHandleGetSize;
}
return (EFI_SUCCESS);
}
return (EFI_NOT_FOUND);
}
/**
Constructor for the Shell library.
Initialize the library and determine if the underlying is a UEFI Shell 2.0 or an EFI shell.
@param ImageHandle the image handle of the process
@param SystemTable the EFI System Table pointer
@retval EFI_SUCCESS the initialization was complete sucessfully
@return others an error ocurred during initialization
**/
EFI_STATUS
EFIAPI
ShellLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
mEfiShellEnvironment2 = NULL;
gEfiShellProtocol = NULL;
gEfiShellParametersProtocol = NULL;
mEfiShellInterface = NULL;
mEfiShellEnvironment2Handle = NULL;
//
// verify that auto initialize is not set false
//
if (PcdGetBool(PcdShellLibAutoInitialize) == 0) {
return (EFI_SUCCESS);
}
return (ShellLibConstructorWorker(ImageHandle, SystemTable));
}
/**
Destructor for the library. free any resources.
@param[in] ImageHandle A copy of the ImageHandle.
@param[in] SystemTable A pointer to the SystemTable for the application.
@retval EFI_SUCCESS The operation was successful.
@return An error from the CloseProtocol function.
**/
EFI_STATUS
EFIAPI
ShellLibDestructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
if (mEfiShellEnvironment2 != NULL) {
gBS->CloseProtocol(mEfiShellEnvironment2Handle==NULL?ImageHandle:mEfiShellEnvironment2Handle,
&gEfiShellEnvironment2Guid,
ImageHandle,
NULL);
mEfiShellEnvironment2 = NULL;
}
if (mEfiShellInterface != NULL) {
gBS->CloseProtocol(ImageHandle,
&gEfiShellInterfaceGuid,
ImageHandle,
NULL);
mEfiShellInterface = NULL;
}
if (gEfiShellProtocol != NULL) {
gBS->CloseProtocol(ImageHandle,
&gEfiShellProtocolGuid,
ImageHandle,
NULL);
gEfiShellProtocol = NULL;
}
if (gEfiShellParametersProtocol != NULL) {
gBS->CloseProtocol(ImageHandle,
&gEfiShellParametersProtocolGuid,
ImageHandle,
NULL);
gEfiShellParametersProtocol = NULL;
}
mEfiShellEnvironment2Handle = NULL;
return (EFI_SUCCESS);
}
/**
This function causes the shell library to initialize itself. If the shell library
is already initialized it will de-initialize all the current protocol poitners and
re-populate them again.
When the library is used with PcdShellLibAutoInitialize set to true this function
will return EFI_SUCCESS and perform no actions.
This function is intended for internal access for shell commands only.
@retval EFI_SUCCESS the initialization was complete sucessfully
**/
EFI_STATUS
EFIAPI
ShellInitialize (
)
{
//
// if auto initialize is not false then skip
//
if (PcdGetBool(PcdShellLibAutoInitialize) != 0) {
return (EFI_SUCCESS);
}
//
// deinit the current stuff
//
ASSERT_EFI_ERROR(ShellLibDestructor(gImageHandle, gST));
//
// init the new stuff
//
return (ShellLibConstructorWorker(gImageHandle, gST));
}
/**
This function will retrieve the information about the file for the handle
specified and store it in allocated pool memory.
This function allocates a buffer to store the file's information. It is the
caller's responsibility to free the buffer
@param FileHandle The file handle of the file for which information is
being requested.
@retval NULL information could not be retrieved.
@return the information about the file
**/
EFI_FILE_INFO*
EFIAPI
ShellGetFileInfo (
IN SHELL_FILE_HANDLE FileHandle
)
{
return (FileFunctionMap.GetFileInfo(FileHandle));
}
/**
This function sets the information about the file for the opened handle
specified.
@param[in] FileHandle The file handle of the file for which information
is being set.
@param[in] FileInfo The information to set.
@retval EFI_SUCCESS The information was set.
@retval EFI_INVALID_PARAMETER A parameter was out of range or invalid.
@retval EFI_UNSUPPORTED The FileHandle does not support FileInfo.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write protected.
@retval EFI_ACCESS_DENIED The file was opened read only.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
ShellSetFileInfo (
IN SHELL_FILE_HANDLE FileHandle,
IN EFI_FILE_INFO *FileInfo
)
{
return (FileFunctionMap.SetFileInfo(FileHandle, FileInfo));
}
/**
This function will open a file or directory referenced by DevicePath.
This function opens a file with the open mode according to the file path. The
Attributes is valid only for EFI_FILE_MODE_CREATE.
@param FilePath on input the device path to the file. On output
the remaining device path.
@param DeviceHandle pointer to the system device handle.
@param FileHandle pointer to the file handle.
@param OpenMode the mode to open the file with.
@param Attributes the file's file attributes.
@retval EFI_SUCCESS The information was set.
@retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
@retval EFI_UNSUPPORTED Could not open the file path.
@retval EFI_NOT_FOUND The specified file could not be found on the
device or the file system could not be found on
the device.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_MEDIA_CHANGED The device has a different medium in it or the
medium is no longer supported.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write protected.
@retval EFI_ACCESS_DENIED The file was opened read only.
@retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the
file.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
ShellOpenFileByDevicePath(
IN OUT EFI_DEVICE_PATH_PROTOCOL **FilePath,
OUT EFI_HANDLE *DeviceHandle,
OUT SHELL_FILE_HANDLE *FileHandle,
IN UINT64 OpenMode,
IN UINT64 Attributes
)
{
CHAR16 *FileName;
EFI_STATUS Status;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *EfiSimpleFileSystemProtocol;
EFI_FILE_PROTOCOL *Handle1;
EFI_FILE_PROTOCOL *Handle2;
if (FilePath == NULL || FileHandle == NULL || DeviceHandle == NULL) {
return (EFI_INVALID_PARAMETER);
}
//
// which shell interface should we use
//
if (gEfiShellProtocol != NULL) {
//
// use UEFI Shell 2.0 method.
//
FileName = gEfiShellProtocol->GetFilePathFromDevicePath(*FilePath);
if (FileName == NULL) {
return (EFI_INVALID_PARAMETER);
}
Status = ShellOpenFileByName(FileName, FileHandle, OpenMode, Attributes);
FreePool(FileName);
return (Status);
}
//
// use old shell method.
//
Status = gBS->LocateDevicePath (&gEfiSimpleFileSystemProtocolGuid,
FilePath,
DeviceHandle);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gBS->OpenProtocol(*DeviceHandle,
&gEfiSimpleFileSystemProtocolGuid,
(VOID**)&EfiSimpleFileSystemProtocol,
gImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (EFI_ERROR (Status)) {
return Status;
}
Status = EfiSimpleFileSystemProtocol->OpenVolume(EfiSimpleFileSystemProtocol, &Handle1);
if (EFI_ERROR (Status)) {
FileHandle = NULL;
return Status;
}
//
// go down directories one node at a time.
//
while (!IsDevicePathEnd (*FilePath)) {
//
// For file system access each node should be a file path component
//
if (DevicePathType (*FilePath) != MEDIA_DEVICE_PATH ||
DevicePathSubType (*FilePath) != MEDIA_FILEPATH_DP
) {
FileHandle = NULL;
return (EFI_INVALID_PARAMETER);
}
//
// Open this file path node
//
Handle2 = Handle1;
Handle1 = NULL;
//
// Try to test opening an existing file
//
Status = Handle2->Open (
Handle2,
&Handle1,
((FILEPATH_DEVICE_PATH*)*FilePath)->PathName,
OpenMode &~EFI_FILE_MODE_CREATE,
0
);
//
// see if the error was that it needs to be created
//
if ((EFI_ERROR (Status)) && (OpenMode != (OpenMode &~EFI_FILE_MODE_CREATE))) {
Status = Handle2->Open (
Handle2,
&Handle1,
((FILEPATH_DEVICE_PATH*)*FilePath)->PathName,
OpenMode,
Attributes
);
}
//
// Close the last node
//
Handle2->Close (Handle2);
if (EFI_ERROR(Status)) {
return (Status);
}
//
// Get the next node
//
*FilePath = NextDevicePathNode (*FilePath);
}
//
// This is a weak spot since if the undefined SHELL_FILE_HANDLE format changes this must change also!
//
*FileHandle = (VOID*)Handle1;
return (EFI_SUCCESS);
}
/**
This function will open a file or directory referenced by filename.
If return is EFI_SUCCESS, the Filehandle is the opened file's handle;
otherwise, the Filehandle is NULL. The Attributes is valid only for
EFI_FILE_MODE_CREATE.
if FileName is NULL then ASSERT()
@param FileName pointer to file name
@param FileHandle pointer to the file handle.
@param OpenMode the mode to open the file with.
@param Attributes the file's file attributes.
@retval EFI_SUCCESS The information was set.
@retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
@retval EFI_UNSUPPORTED Could not open the file path.
@retval EFI_NOT_FOUND The specified file could not be found on the
device or the file system could not be found
on the device.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_MEDIA_CHANGED The device has a different medium in it or the
medium is no longer supported.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write protected.
@retval EFI_ACCESS_DENIED The file was opened read only.
@retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the
file.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
ShellOpenFileByName(
IN CONST CHAR16 *FileName,
OUT SHELL_FILE_HANDLE *FileHandle,
IN UINT64 OpenMode,
IN UINT64 Attributes
)
{
EFI_HANDLE DeviceHandle;
EFI_DEVICE_PATH_PROTOCOL *FilePath;
EFI_STATUS Status;
EFI_FILE_INFO *FileInfo;
//
// ASSERT if FileName is NULL
//
ASSERT(FileName != NULL);
if (FileName == NULL) {
return (EFI_INVALID_PARAMETER);
}
if (gEfiShellProtocol != NULL) {
if ((OpenMode & EFI_FILE_MODE_CREATE) == EFI_FILE_MODE_CREATE && (Attributes & EFI_FILE_DIRECTORY) == EFI_FILE_DIRECTORY) {
return ShellCreateDirectory(FileName, FileHandle);
}
//
// Use UEFI Shell 2.0 method
//
Status = gEfiShellProtocol->OpenFileByName(FileName,
FileHandle,
OpenMode);
if (StrCmp(FileName, L"NUL") != 0 && !EFI_ERROR(Status) && ((OpenMode & EFI_FILE_MODE_CREATE) != 0)){
FileInfo = FileFunctionMap.GetFileInfo(*FileHandle);
ASSERT(FileInfo != NULL);
FileInfo->Attribute = Attributes;
Status = FileFunctionMap.SetFileInfo(*FileHandle, FileInfo);
FreePool(FileInfo);
}
return (Status);
}
//
// Using EFI Shell version
// this means convert name to path and call that function
// since this will use EFI method again that will open it.
//
ASSERT(mEfiShellEnvironment2 != NULL);
FilePath = mEfiShellEnvironment2->NameToPath ((CHAR16*)FileName);
if (FilePath != NULL) {
return (ShellOpenFileByDevicePath(&FilePath,
&DeviceHandle,
FileHandle,
OpenMode,
Attributes));
}
return (EFI_DEVICE_ERROR);
}
/**
This function create a directory
If return is EFI_SUCCESS, the Filehandle is the opened directory's handle;
otherwise, the Filehandle is NULL. If the directory already existed, this
function opens the existing directory.
@param DirectoryName pointer to directory name
@param FileHandle pointer to the file handle.
@retval EFI_SUCCESS The information was set.
@retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
@retval EFI_UNSUPPORTED Could not open the file path.
@retval EFI_NOT_FOUND The specified file could not be found on the
device or the file system could not be found
on the device.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_MEDIA_CHANGED The device has a different medium in it or the
medium is no longer supported.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write protected.
@retval EFI_ACCESS_DENIED The file was opened read only.
@retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the
file.
@retval EFI_VOLUME_FULL The volume is full.
@sa ShellOpenFileByName
**/
EFI_STATUS
EFIAPI
ShellCreateDirectory(
IN CONST CHAR16 *DirectoryName,
OUT SHELL_FILE_HANDLE *FileHandle
)
{
if (gEfiShellProtocol != NULL) {
//
// Use UEFI Shell 2.0 method
//
return (gEfiShellProtocol->CreateFile(DirectoryName,
EFI_FILE_DIRECTORY,
FileHandle
));
} else {
return (ShellOpenFileByName(DirectoryName,
FileHandle,
EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE,
EFI_FILE_DIRECTORY
));
}
}
/**
This function reads information from an opened file.
If FileHandle is not a directory, the function reads the requested number of
bytes from the file at the file's current position and returns them in Buffer.
If the read goes beyond the end of the file, the read length is truncated to the
end of the file. The file's current position is increased by the number of bytes
returned. If FileHandle is a directory, the function reads the directory entry
at the file's current position and returns the entry in Buffer. If the Buffer
is not large enough to hold the current directory entry, then
EFI_BUFFER_TOO_SMALL is returned and the current file position is not updated.
BufferSize is set to be the size of the buffer needed to read the entry. On
success, the current position is updated to the next directory entry. If there
are no more directory entries, the read returns a zero-length buffer.
EFI_FILE_INFO is the structure returned as the directory entry.
@param FileHandle the opened file handle
@param BufferSize on input the size of buffer in bytes. on return
the number of bytes written.
@param Buffer the buffer to put read data into.
@retval EFI_SUCCESS Data was read.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_BUFFER_TO_SMALL Buffer is too small. ReadSize contains required
size.
**/
EFI_STATUS
EFIAPI
ShellReadFile(
IN SHELL_FILE_HANDLE FileHandle,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
return (FileFunctionMap.ReadFile(FileHandle, BufferSize, Buffer));
}
/**
Write data to a file.
This function writes the specified number of bytes to the file at the current
file position. The current file position is advanced the actual number of bytes
written, which is returned in BufferSize. Partial writes only occur when there
has been a data error during the write attempt (such as "volume space full").
The file is automatically grown to hold the data if required. Direct writes to
opened directories are not supported.
@param FileHandle The opened file for writing
@param BufferSize on input the number of bytes in Buffer. On output
the number of bytes written.
@param Buffer the buffer containing data to write is stored.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORTED Writes to an open directory are not supported.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The device is write-protected.
@retval EFI_ACCESS_DENIED The file was open for read only.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
ShellWriteFile(
IN SHELL_FILE_HANDLE FileHandle,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
)
{
return (FileFunctionMap.WriteFile(FileHandle, BufferSize, Buffer));
}
/**
Close an open file handle.
This function closes a specified file handle. All "dirty" cached file data is
flushed to the device, and the file is closed. In all cases the handle is
closed.
@param FileHandle the file handle to close.
@retval EFI_SUCCESS the file handle was closed sucessfully.
**/
EFI_STATUS
EFIAPI
ShellCloseFile (
IN SHELL_FILE_HANDLE *FileHandle
)
{
return (FileFunctionMap.CloseFile(*FileHandle));
}
/**
Delete a file and close the handle
This function closes and deletes a file. In all cases the file handle is closed.
If the file cannot be deleted, the warning code EFI_WARN_DELETE_FAILURE is
returned, but the handle is still closed.
@param FileHandle the file handle to delete
@retval EFI_SUCCESS the file was closed sucessfully
@retval EFI_WARN_DELETE_FAILURE the handle was closed, but the file was not
deleted
@retval INVALID_PARAMETER One of the parameters has an invalid value.
**/
EFI_STATUS
EFIAPI
ShellDeleteFile (
IN SHELL_FILE_HANDLE *FileHandle
)
{
return (FileFunctionMap.DeleteFile(*FileHandle));
}
/**
Set the current position in a file.
This function sets the current file position for the handle to the position
supplied. With the exception of seeking to position 0xFFFFFFFFFFFFFFFF, only
absolute positioning is supported, and seeking past the end of the file is
allowed (a subsequent write would grow the file). Seeking to position
0xFFFFFFFFFFFFFFFF causes the current position to be set to the end of the file.
If FileHandle is a directory, the only position that may be set is zero. This
has the effect of starting the read process of the directory entries over.
@param FileHandle The file handle on which the position is being set
@param Position Byte position from begining of file
@retval EFI_SUCCESS Operation completed sucessfully.
@retval EFI_UNSUPPORTED the seek request for non-zero is not valid on
directories.
@retval INVALID_PARAMETER One of the parameters has an invalid value.
**/
EFI_STATUS
EFIAPI
ShellSetFilePosition (
IN SHELL_FILE_HANDLE FileHandle,
IN UINT64 Position
)
{
return (FileFunctionMap.SetFilePosition(FileHandle, Position));
}
/**
Gets a file's current position
This function retrieves the current file position for the file handle. For
directories, the current file position has no meaning outside of the file
system driver and as such the operation is not supported. An error is returned
if FileHandle is a directory.
@param FileHandle The open file handle on which to get the position.
@param Position Byte position from begining of file.
@retval EFI_SUCCESS the operation completed sucessfully.
@retval INVALID_PARAMETER One of the parameters has an invalid value.
@retval EFI_UNSUPPORTED the request is not valid on directories.
**/
EFI_STATUS
EFIAPI
ShellGetFilePosition (
IN SHELL_FILE_HANDLE FileHandle,
OUT UINT64 *Position
)
{
return (FileFunctionMap.GetFilePosition(FileHandle, Position));
}
/**
Flushes data on a file
This function flushes all modified data associated with a file to a device.
@param FileHandle The file handle on which to flush data
@retval EFI_SUCCESS The data was flushed.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write protected.
@retval EFI_ACCESS_DENIED The file was opened for read only.
**/
EFI_STATUS
EFIAPI
ShellFlushFile (
IN SHELL_FILE_HANDLE FileHandle
)
{
return (FileFunctionMap.FlushFile(FileHandle));
}
/** Retrieve first entry from a directory.
This function takes an open directory handle and gets information from the
first entry in the directory. A buffer is allocated to contain
the information and a pointer to the buffer is returned in *Buffer. The
caller can use ShellFindNextFile() to get subsequent directory entries.
The buffer will be freed by ShellFindNextFile() when the last directory
entry is read. Otherwise, the caller must free the buffer, using FreePool,
when finished with it.
@param[in] DirHandle The file handle of the directory to search.
@param[out] Buffer The pointer to the buffer for the file's information.
@retval EFI_SUCCESS Found the first file.
@retval EFI_NOT_FOUND Cannot find the directory.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@return Others status of ShellGetFileInfo, ShellSetFilePosition,
or ShellReadFile
**/
EFI_STATUS
EFIAPI
ShellFindFirstFile (
IN SHELL_FILE_HANDLE DirHandle,
OUT EFI_FILE_INFO **Buffer
)
{
//
// pass to file handle lib
//
return (FileHandleFindFirstFile(DirHandle, Buffer));
}
/** Retrieve next entries from a directory.
To use this function, the caller must first call the ShellFindFirstFile()
function to get the first directory entry. Subsequent directory entries are
retrieved by using the ShellFindNextFile() function. This function can
be called several times to get each entry from the directory. If the call of
ShellFindNextFile() retrieved the last directory entry, the next call of
this function will set *NoFile to TRUE and free the buffer.
@param[in] DirHandle The file handle of the directory.
@param[out] Buffer The pointer to buffer for file's information.
@param[out] NoFile The pointer to boolean when last file is found.
@retval EFI_SUCCESS Found the next file, or reached last file
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
**/
EFI_STATUS
EFIAPI
ShellFindNextFile(
IN SHELL_FILE_HANDLE DirHandle,
OUT EFI_FILE_INFO *Buffer,
OUT BOOLEAN *NoFile
)
{
//
// pass to file handle lib
//
return (FileHandleFindNextFile(DirHandle, Buffer, NoFile));
}
/**
Retrieve the size of a file.
if FileHandle is NULL then ASSERT()
if Size is NULL then ASSERT()
This function extracts the file size info from the FileHandle's EFI_FILE_INFO
data.
@param FileHandle file handle from which size is retrieved
@param Size pointer to size
@retval EFI_SUCCESS operation was completed sucessfully
@retval EFI_DEVICE_ERROR cannot access the file
**/
EFI_STATUS
EFIAPI
ShellGetFileSize (
IN SHELL_FILE_HANDLE FileHandle,
OUT UINT64 *Size
)
{
return (FileFunctionMap.GetFileSize(FileHandle, Size));
}
/**
Retrieves the status of the break execution flag
this function is useful to check whether the application is being asked to halt by the shell.
@retval TRUE the execution break is enabled
@retval FALSE the execution break is not enabled
**/
BOOLEAN
EFIAPI
ShellGetExecutionBreakFlag(
VOID
)
{
//
// Check for UEFI Shell 2.0 protocols
//
if (gEfiShellProtocol != NULL) {
//
// We are using UEFI Shell 2.0; see if the event has been triggered
//
if (gBS->CheckEvent(gEfiShellProtocol->ExecutionBreak) != EFI_SUCCESS) {
return (FALSE);
}
return (TRUE);
}
//
// using EFI Shell; call the function to check
//
if (mEfiShellEnvironment2 != NULL) {
return (mEfiShellEnvironment2->GetExecutionBreak());
}
return (FALSE);
}
/**
return the value of an environment variable
this function gets the value of the environment variable set by the
ShellSetEnvironmentVariable function
@param EnvKey The key name of the environment variable.
@retval NULL the named environment variable does not exist.
@return != NULL pointer to the value of the environment variable
**/
CONST CHAR16*
EFIAPI
ShellGetEnvironmentVariable (
IN CONST CHAR16 *EnvKey
)
{
//
// Check for UEFI Shell 2.0 protocols
//
if (gEfiShellProtocol != NULL) {
return (gEfiShellProtocol->GetEnv(EnvKey));
}
//
// Check for EFI shell
//
if (mEfiShellEnvironment2 != NULL) {
return (mEfiShellEnvironment2->GetEnv((CHAR16*)EnvKey));
}
return NULL;
}
/**
set the value of an environment variable
This function changes the current value of the specified environment variable. If the
environment variable exists and the Value is an empty string, then the environment
variable is deleted. If the environment variable exists and the Value is not an empty
string, then the value of the environment variable is changed. If the environment
variable does not exist and the Value is an empty string, there is no action. If the
environment variable does not exist and the Value is a non-empty string, then the
environment variable is created and assigned the specified value.
This is not supported pre-UEFI Shell 2.0.
@param EnvKey The key name of the environment variable.
@param EnvVal The Value of the environment variable
@param Volatile Indicates whether the variable is non-volatile (FALSE) or volatile (TRUE).
@retval EFI_SUCCESS the operation was completed sucessfully
@retval EFI_UNSUPPORTED This operation is not allowed in pre UEFI 2.0 Shell environments
**/
EFI_STATUS
EFIAPI
ShellSetEnvironmentVariable (
IN CONST CHAR16 *EnvKey,
IN CONST CHAR16 *EnvVal,
IN BOOLEAN Volatile
)
{
//
// Check for UEFI Shell 2.0 protocols
//
if (gEfiShellProtocol != NULL) {
return (gEfiShellProtocol->SetEnv(EnvKey, EnvVal, Volatile));
}
//
// This feature does not exist under EFI shell
//
return (EFI_UNSUPPORTED);
}
/**
Cause the shell to parse and execute a command line.
This function creates a nested instance of the shell and executes the specified
command (CommandLine) with the specified environment (Environment). Upon return,
the status code returned by the specified command is placed in StatusCode.
If Environment is NULL, then the current environment is used and all changes made
by the commands executed will be reflected in the current environment. If the
Environment is non-NULL, then the changes made will be discarded.
The CommandLine is executed from the current working directory on the current
device.
The EnvironmentVariables and Status parameters are ignored in a pre-UEFI Shell 2.0
environment. The values pointed to by the parameters will be unchanged by the
ShellExecute() function. The Output parameter has no effect in a
UEFI Shell 2.0 environment.
@param[in] ParentHandle The parent image starting the operation.
@param[in] CommandLine The pointer to a NULL terminated command line.
@param[in] Output True to display debug output. False to hide it.
@param[in] EnvironmentVariables Optional pointer to array of environment variables
in the form "x=y". If NULL, the current set is used.
@param[out] Status The status of the run command line.
@retval EFI_SUCCESS The operation completed sucessfully. Status
contains the status code returned.
@retval EFI_INVALID_PARAMETER A parameter contains an invalid value.
@retval EFI_OUT_OF_RESOURCES Out of resources.
@retval EFI_UNSUPPORTED The operation is not allowed.
**/
EFI_STATUS
EFIAPI
ShellExecute (
IN EFI_HANDLE *ParentHandle,
IN CHAR16 *CommandLine OPTIONAL,
IN BOOLEAN Output OPTIONAL,
IN CHAR16 **EnvironmentVariables OPTIONAL,
OUT EFI_STATUS *Status OPTIONAL
)
{
//
// Check for UEFI Shell 2.0 protocols
//
if (gEfiShellProtocol != NULL) {
//
// Call UEFI Shell 2.0 version (not using Output parameter)
//
return (gEfiShellProtocol->Execute(ParentHandle,
CommandLine,
EnvironmentVariables,
Status));
}
//
// Check for EFI shell
//
if (mEfiShellEnvironment2 != NULL) {
//
// Call EFI Shell version (not using EnvironmentVariables or Status parameters)
// Due to oddity in the EFI shell we want to dereference the ParentHandle here
//
return (mEfiShellEnvironment2->Execute(*ParentHandle,
CommandLine,
Output));
}
return (EFI_UNSUPPORTED);
}
/**
Retreives the current directory path
If the DeviceName is NULL, it returns the current device's current directory
name. If the DeviceName is not NULL, it returns the current directory name
on specified drive.
@param DeviceName the name of the drive to get directory on
@retval NULL the directory does not exist
@return != NULL the directory
**/
CONST CHAR16*
EFIAPI
ShellGetCurrentDir (
IN CHAR16 * CONST DeviceName OPTIONAL
)
{
//
// Check for UEFI Shell 2.0 protocols
//
if (gEfiShellProtocol != NULL) {
return (gEfiShellProtocol->GetCurDir(DeviceName));
}
//
// Check for EFI shell
//
if (mEfiShellEnvironment2 != NULL) {
return (mEfiShellEnvironment2->CurDir(DeviceName));
}
return (NULL);
}
/**
sets (enabled or disabled) the page break mode
when page break mode is enabled the screen will stop scrolling
and wait for operator input before scrolling a subsequent screen.
@param CurrentState TRUE to enable and FALSE to disable
**/
VOID
EFIAPI
ShellSetPageBreakMode (
IN BOOLEAN CurrentState
)
{
//
// check for enabling
//
if (CurrentState != 0x00) {
//
// check for UEFI Shell 2.0
//
if (gEfiShellProtocol != NULL) {
//
// Enable with UEFI 2.0 Shell
//
gEfiShellProtocol->EnablePageBreak();
return;
} else {
//
// Check for EFI shell
//
if (mEfiShellEnvironment2 != NULL) {
//
// Enable with EFI Shell
//
mEfiShellEnvironment2->EnablePageBreak (DEFAULT_INIT_ROW, DEFAULT_AUTO_LF);
return;
}
}
} else {
//
// check for UEFI Shell 2.0
//
if (gEfiShellProtocol != NULL) {
//
// Disable with UEFI 2.0 Shell
//
gEfiShellProtocol->DisablePageBreak();
return;
} else {
//
// Check for EFI shell
//
if (mEfiShellEnvironment2 != NULL) {
//
// Disable with EFI Shell
//
mEfiShellEnvironment2->DisablePageBreak ();
return;
}
}
}
}
///
/// version of EFI_SHELL_FILE_INFO struct, except has no CONST pointers.
/// This allows for the struct to be populated.
///
typedef struct {
LIST_ENTRY Link;
EFI_STATUS Status;
CHAR16 *FullName;
CHAR16 *FileName;
SHELL_FILE_HANDLE Handle;
EFI_FILE_INFO *Info;
} EFI_SHELL_FILE_INFO_NO_CONST;
/**
Converts a EFI shell list of structures to the coresponding UEFI Shell 2.0 type of list.
if OldStyleFileList is NULL then ASSERT()
this function will convert a SHELL_FILE_ARG based list into a callee allocated
EFI_SHELL_FILE_INFO based list. it is up to the caller to free the memory via
the ShellCloseFileMetaArg function.
@param[in] FileList the EFI shell list type
@param[in, out] ListHead the list to add to
@retval the resultant head of the double linked new format list;
**/
LIST_ENTRY*
EFIAPI
InternalShellConvertFileListType (
IN LIST_ENTRY *FileList,
IN OUT LIST_ENTRY *ListHead
)
{
SHELL_FILE_ARG *OldInfo;
LIST_ENTRY *Link;
EFI_SHELL_FILE_INFO_NO_CONST *NewInfo;
//
// ASSERTs
//
ASSERT(FileList != NULL);
ASSERT(ListHead != NULL);
//
// enumerate through each member of the old list and copy
//
for (Link = FileList->ForwardLink; Link != FileList; Link = Link->ForwardLink) {
OldInfo = CR (Link, SHELL_FILE_ARG, Link, SHELL_FILE_ARG_SIGNATURE);
ASSERT(OldInfo != NULL);
//
// Skip ones that failed to open...
//
if (OldInfo->Status != EFI_SUCCESS) {
continue;
}
//
// make sure the old list was valid
//
ASSERT(OldInfo->Info != NULL);
ASSERT(OldInfo->FullName != NULL);
ASSERT(OldInfo->FileName != NULL);
//
// allocate a new EFI_SHELL_FILE_INFO object
//
NewInfo = AllocateZeroPool(sizeof(EFI_SHELL_FILE_INFO));
if (NewInfo == NULL) {
ShellCloseFileMetaArg((EFI_SHELL_FILE_INFO**)(&ListHead));
ListHead = NULL;
break;
}
//
// copy the simple items
//
NewInfo->Handle = OldInfo->Handle;
NewInfo->Status = OldInfo->Status;
// old shell checks for 0 not NULL
OldInfo->Handle = 0;
//
// allocate new space to copy strings and structure
//
NewInfo->FullName = AllocateZeroPool(StrSize(OldInfo->FullName));
NewInfo->FileName = AllocateZeroPool(StrSize(OldInfo->FileName));
NewInfo->Info = AllocateZeroPool((UINTN)OldInfo->Info->Size);
//
// make sure all the memory allocations were sucessful
//
if (NULL == NewInfo->FullName || NewInfo->FileName == NULL || NewInfo->Info == NULL) {
ShellCloseFileMetaArg((EFI_SHELL_FILE_INFO**)(&ListHead));
ListHead = NULL;
break;
}
//
// Copt the strings and structure
//
StrCpy(NewInfo->FullName, OldInfo->FullName);
StrCpy(NewInfo->FileName, OldInfo->FileName);
gBS->CopyMem (NewInfo->Info, OldInfo->Info, (UINTN)OldInfo->Info->Size);
//
// add that to the list
//
InsertTailList(ListHead, &NewInfo->Link);
}
return (ListHead);
}
/**
Opens a group of files based on a path.
This function uses the Arg to open all the matching files. Each matched
file has a SHELL_FILE_ARG structure to record the file information. These
structures are placed on the list ListHead. Users can get the SHELL_FILE_ARG
structures from ListHead to access each file. This function supports wildcards
and will process '?' and '*' as such. the list must be freed with a call to
ShellCloseFileMetaArg().
If you are NOT appending to an existing list *ListHead must be NULL. If
*ListHead is NULL then it must be callee freed.
@param Arg pointer to path string
@param OpenMode mode to open files with
@param ListHead head of linked list of results
@retval EFI_SUCCESS the operation was sucessful and the list head
contains the list of opened files
@return != EFI_SUCCESS the operation failed
@sa InternalShellConvertFileListType
**/
EFI_STATUS
EFIAPI
ShellOpenFileMetaArg (
IN CHAR16 *Arg,
IN UINT64 OpenMode,
IN OUT EFI_SHELL_FILE_INFO **ListHead
)
{
EFI_STATUS Status;
LIST_ENTRY mOldStyleFileList;
//
// ASSERT that Arg and ListHead are not NULL
//
ASSERT(Arg != NULL);
ASSERT(ListHead != NULL);
//
// Check for UEFI Shell 2.0 protocols
//
if (gEfiShellProtocol != NULL) {
if (*ListHead == NULL) {
*ListHead = (EFI_SHELL_FILE_INFO*)AllocateZeroPool(sizeof(EFI_SHELL_FILE_INFO));
if (*ListHead == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
InitializeListHead(&((*ListHead)->Link));
}
Status = gEfiShellProtocol->OpenFileList(Arg,
OpenMode,
ListHead);
if (EFI_ERROR(Status)) {
gEfiShellProtocol->RemoveDupInFileList(ListHead);
} else {
Status = gEfiShellProtocol->RemoveDupInFileList(ListHead);
}
if (*ListHead != NULL && IsListEmpty(&(*ListHead)->Link)) {
FreePool(*ListHead);
*ListHead = NULL;
return (EFI_NOT_FOUND);
}
return (Status);
}
//
// Check for EFI shell
//
if (mEfiShellEnvironment2 != NULL) {
//
// make sure the list head is initialized
//
InitializeListHead(&mOldStyleFileList);
//
// Get the EFI Shell list of files
//
Status = mEfiShellEnvironment2->FileMetaArg(Arg, &mOldStyleFileList);
if (EFI_ERROR(Status)) {
*ListHead = NULL;
return (Status);
}
if (*ListHead == NULL) {
*ListHead = (EFI_SHELL_FILE_INFO *)AllocateZeroPool(sizeof(EFI_SHELL_FILE_INFO));
if (*ListHead == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
InitializeListHead(&((*ListHead)->Link));
}
//
// Convert that to equivalent of UEFI Shell 2.0 structure
//
InternalShellConvertFileListType(&mOldStyleFileList, &(*ListHead)->Link);
//
// Free the EFI Shell version that was converted.
//
mEfiShellEnvironment2->FreeFileList(&mOldStyleFileList);
if ((*ListHead)->Link.ForwardLink == (*ListHead)->Link.BackLink && (*ListHead)->Link.BackLink == &((*ListHead)->Link)) {
FreePool(*ListHead);
*ListHead = NULL;
Status = EFI_NOT_FOUND;
}
return (Status);
}
return (EFI_UNSUPPORTED);
}
/**
Free the linked list returned from ShellOpenFileMetaArg.
if ListHead is NULL then ASSERT().
@param ListHead the pointer to free.
@retval EFI_SUCCESS the operation was sucessful.
**/
EFI_STATUS
EFIAPI
ShellCloseFileMetaArg (
IN OUT EFI_SHELL_FILE_INFO **ListHead
)
{
LIST_ENTRY *Node;
//
// ASSERT that ListHead is not NULL
//
ASSERT(ListHead != NULL);
//
// Check for UEFI Shell 2.0 protocols
//
if (gEfiShellProtocol != NULL) {
return (gEfiShellProtocol->FreeFileList(ListHead));
} else if (mEfiShellEnvironment2 != NULL) {
//
// Since this is EFI Shell version we need to free our internally made copy
// of the list
//
for ( Node = GetFirstNode(&(*ListHead)->Link)
; *ListHead != NULL && !IsListEmpty(&(*ListHead)->Link)
; Node = GetFirstNode(&(*ListHead)->Link)) {
RemoveEntryList(Node);
((EFI_FILE_PROTOCOL*)((EFI_SHELL_FILE_INFO_NO_CONST*)Node)->Handle)->Close(((EFI_SHELL_FILE_INFO_NO_CONST*)Node)->Handle);
FreePool(((EFI_SHELL_FILE_INFO_NO_CONST*)Node)->FullName);
FreePool(((EFI_SHELL_FILE_INFO_NO_CONST*)Node)->FileName);
FreePool(((EFI_SHELL_FILE_INFO_NO_CONST*)Node)->Info);
FreePool((EFI_SHELL_FILE_INFO_NO_CONST*)Node);
}
return EFI_SUCCESS;
}
return (EFI_UNSUPPORTED);
}
/**
Find a file by searching the CWD and then the path.
If FileName is NULL then ASSERT.
If the return value is not NULL then the memory must be caller freed.
@param FileName Filename string.
@retval NULL the file was not found
@return !NULL the full path to the file.
**/
CHAR16 *
EFIAPI
ShellFindFilePath (
IN CONST CHAR16 *FileName
)
{
CONST CHAR16 *Path;
SHELL_FILE_HANDLE Handle;
EFI_STATUS Status;
CHAR16 *RetVal;
CHAR16 *TestPath;
CONST CHAR16 *Walker;
UINTN Size;
CHAR16 *TempChar;
RetVal = NULL;
//
// First make sure its not an absolute path.
//
Status = ShellOpenFileByName(FileName, &Handle, EFI_FILE_MODE_READ, 0);
if (!EFI_ERROR(Status)){
if (FileHandleIsDirectory(Handle) != EFI_SUCCESS) {
ASSERT(RetVal == NULL);
RetVal = StrnCatGrow(&RetVal, NULL, FileName, 0);
ShellCloseFile(&Handle);
return (RetVal);
} else {
ShellCloseFile(&Handle);
}
}
Path = ShellGetEnvironmentVariable(L"cwd");
if (Path != NULL) {
Size = StrSize(Path);
Size += StrSize(FileName);
TestPath = AllocateZeroPool(Size);
if (TestPath == NULL) {
return (NULL);
}
StrCpy(TestPath, Path);
StrCat(TestPath, FileName);
Status = ShellOpenFileByName(TestPath, &Handle, EFI_FILE_MODE_READ, 0);
if (!EFI_ERROR(Status)){
if (FileHandleIsDirectory(Handle) != EFI_SUCCESS) {
ASSERT(RetVal == NULL);
RetVal = StrnCatGrow(&RetVal, NULL, TestPath, 0);
ShellCloseFile(&Handle);
FreePool(TestPath);
return (RetVal);
} else {
ShellCloseFile(&Handle);
}
}
FreePool(TestPath);
}
Path = ShellGetEnvironmentVariable(L"path");
if (Path != NULL) {
Size = StrSize(Path)+sizeof(CHAR16);
Size += StrSize(FileName);
TestPath = AllocateZeroPool(Size);
if (TestPath == NULL) {
return (NULL);
}
Walker = (CHAR16*)Path;
do {
CopyMem(TestPath, Walker, StrSize(Walker));
if (TestPath != NULL) {
TempChar = StrStr(TestPath, L";");
if (TempChar != NULL) {
*TempChar = CHAR_NULL;
}
if (TestPath[StrLen(TestPath)-1] != L'\\') {
StrCat(TestPath, L"\\");
}
if (FileName[0] == L'\\') {
FileName++;
}
StrCat(TestPath, FileName);
if (StrStr(Walker, L";") != NULL) {
Walker = StrStr(Walker, L";") + 1;
} else {
Walker = NULL;
}
Status = ShellOpenFileByName(TestPath, &Handle, EFI_FILE_MODE_READ, 0);
if (!EFI_ERROR(Status)){
if (FileHandleIsDirectory(Handle) != EFI_SUCCESS) {
ASSERT(RetVal == NULL);
RetVal = StrnCatGrow(&RetVal, NULL, TestPath, 0);
ShellCloseFile(&Handle);
break;
} else {
ShellCloseFile(&Handle);
}
}
}
} while (Walker != NULL && Walker[0] != CHAR_NULL);
FreePool(TestPath);
}
return (RetVal);
}
/**
Find a file by searching the CWD and then the path with a variable set of file
extensions. If the file is not found it will append each extension in the list
in the order provided and return the first one that is successful.
If FileName is NULL, then ASSERT.
If FileExtension is NULL, then behavior is identical to ShellFindFilePath.
If the return value is not NULL then the memory must be caller freed.
@param[in] FileName Filename string.
@param[in] FileExtension Semi-colon delimeted list of possible extensions.
@retval NULL The file was not found.
@retval !NULL The path to the file.
**/
CHAR16 *
EFIAPI
ShellFindFilePathEx (
IN CONST CHAR16 *FileName,
IN CONST CHAR16 *FileExtension
)
{
CHAR16 *TestPath;
CHAR16 *RetVal;
CONST CHAR16 *ExtensionWalker;
UINTN Size;
CHAR16 *TempChar;
CHAR16 *TempChar2;
ASSERT(FileName != NULL);
if (FileExtension == NULL) {
return (ShellFindFilePath(FileName));
}
RetVal = ShellFindFilePath(FileName);
if (RetVal != NULL) {
return (RetVal);
}
Size = StrSize(FileName);
Size += StrSize(FileExtension);
TestPath = AllocateZeroPool(Size);
if (TestPath == NULL) {
return (NULL);
}
for (ExtensionWalker = FileExtension, TempChar2 = (CHAR16*)FileExtension; TempChar2 != NULL ; ExtensionWalker = TempChar2 + 1){
StrCpy(TestPath, FileName);
if (ExtensionWalker != NULL) {
StrCat(TestPath, ExtensionWalker);
}
TempChar = StrStr(TestPath, L";");
if (TempChar != NULL) {
*TempChar = CHAR_NULL;
}
RetVal = ShellFindFilePath(TestPath);
if (RetVal != NULL) {
break;
}
ASSERT(ExtensionWalker != NULL);
TempChar2 = StrStr(ExtensionWalker, L";");
}
FreePool(TestPath);
return (RetVal);
}
typedef struct {
LIST_ENTRY Link;
CHAR16 *Name;
SHELL_PARAM_TYPE Type;
CHAR16 *Value;
UINTN OriginalPosition;
} SHELL_PARAM_PACKAGE;
/**
Checks the list of valid arguments and returns TRUE if the item was found. If the
return value is TRUE then the type parameter is set also.
if CheckList is NULL then ASSERT();
if Name is NULL then ASSERT();
if Type is NULL then ASSERT();
@param Name pointer to Name of parameter found
@param CheckList List to check against
@param Type pointer to type of parameter if it was found
@retval TRUE the Parameter was found. Type is valid.
@retval FALSE the Parameter was not found. Type is not valid.
**/
BOOLEAN
EFIAPI
InternalIsOnCheckList (
IN CONST CHAR16 *Name,
IN CONST SHELL_PARAM_ITEM *CheckList,
OUT SHELL_PARAM_TYPE *Type
)
{
SHELL_PARAM_ITEM *TempListItem;
CHAR16 *TempString;
//
// ASSERT that all 3 pointer parameters aren't NULL
//
ASSERT(CheckList != NULL);
ASSERT(Type != NULL);
ASSERT(Name != NULL);
//
// question mark and page break mode are always supported
//
if ((StrCmp(Name, L"-?") == 0) ||
(StrCmp(Name, L"-b") == 0)
) {
*Type = TypeFlag;
return (TRUE);
}
//
// Enumerate through the list
//
for (TempListItem = (SHELL_PARAM_ITEM*)CheckList ; TempListItem->Name != NULL ; TempListItem++) {
//
// If the Type is TypeStart only check the first characters of the passed in param
// If it matches set the type and return TRUE
//
if (TempListItem->Type == TypeStart) {
if (StrnCmp(Name, TempListItem->Name, StrLen(TempListItem->Name)) == 0) {
*Type = TempListItem->Type;
return (TRUE);
}
TempString = NULL;
TempString = StrnCatGrow(&TempString, NULL, Name, StrLen(TempListItem->Name));
if (TempString != NULL) {
if (StringNoCaseCompare(&TempString, &TempListItem->Name) == 0) {
*Type = TempListItem->Type;
FreePool(TempString);
return (TRUE);
}
FreePool(TempString);
}
} else if (StringNoCaseCompare(&Name, &TempListItem->Name) == 0) {
*Type = TempListItem->Type;
return (TRUE);
}
}
return (FALSE);
}
/**
Checks the string for indicators of "flag" status. this is a leading '/', '-', or '+'
@param[in] Name pointer to Name of parameter found
@param[in] AlwaysAllowNumbers TRUE to allow numbers, FALSE to not.
@retval TRUE the Parameter is a flag.
@retval FALSE the Parameter not a flag.
**/
BOOLEAN
EFIAPI
InternalIsFlag (
IN CONST CHAR16 *Name,
IN BOOLEAN AlwaysAllowNumbers
)
{
//
// ASSERT that Name isn't NULL
//
ASSERT(Name != NULL);
//
// If we accept numbers then dont return TRUE. (they will be values)
//
if (((Name[0] == L'-' || Name[0] == L'+') && ShellIsHexaDecimalDigitCharacter(Name[1])) && AlwaysAllowNumbers) {
return (FALSE);
}
//
// If the Name has a /, +, or - as the first character return TRUE
//
if ((Name[0] == L'/') ||
(Name[0] == L'-') ||
(Name[0] == L'+')
) {
return (TRUE);
}
return (FALSE);
}
/**
Checks the command line arguments passed against the list of valid ones.
If no initialization is required, then return RETURN_SUCCESS.
@param[in] CheckList pointer to list of parameters to check
@param[out] CheckPackage pointer to pointer to list checked values
@param[out] ProblemParam optional pointer to pointer to unicode string for
the paramater that caused failure. If used then the
caller is responsible for freeing the memory.
@param[in] AutoPageBreak will automatically set PageBreakEnabled for "b" parameter
@param[in] Argv pointer to array of parameters
@param[in] Argc Count of parameters in Argv
@param[in] AlwaysAllowNumbers TRUE to allow numbers always, FALSE otherwise.
@retval EFI_SUCCESS The operation completed sucessfully.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed
@retval EFI_INVALID_PARAMETER A parameter was invalid
@retval EFI_VOLUME_CORRUPTED the command line was corrupt. an argument was
duplicated. the duplicated command line argument
was returned in ProblemParam if provided.
@retval EFI_NOT_FOUND a argument required a value that was missing.
the invalid command line argument was returned in
ProblemParam if provided.
**/
EFI_STATUS
EFIAPI
InternalCommandLineParse (
IN CONST SHELL_PARAM_ITEM *CheckList,
OUT LIST_ENTRY **CheckPackage,
OUT CHAR16 **ProblemParam OPTIONAL,
IN BOOLEAN AutoPageBreak,
IN CONST CHAR16 **Argv,
IN UINTN Argc,
IN BOOLEAN AlwaysAllowNumbers
)
{
UINTN LoopCounter;
SHELL_PARAM_TYPE CurrentItemType;
SHELL_PARAM_PACKAGE *CurrentItemPackage;
UINTN GetItemValue;
UINTN ValueSize;
UINTN Count;
CONST CHAR16 *TempPointer;
CurrentItemPackage = NULL;
GetItemValue = 0;
ValueSize = 0;
Count = 0;
//
// If there is only 1 item we dont need to do anything
//
if (Argc < 1) {
*CheckPackage = NULL;
return (EFI_SUCCESS);
}
//
// ASSERTs
//
ASSERT(CheckList != NULL);
ASSERT(Argv != NULL);
//
// initialize the linked list
//
*CheckPackage = (LIST_ENTRY*)AllocateZeroPool(sizeof(LIST_ENTRY));
if (*CheckPackage == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
InitializeListHead(*CheckPackage);
//
// loop through each of the arguments
//
for (LoopCounter = 0 ; LoopCounter < Argc ; ++LoopCounter) {
if (Argv[LoopCounter] == NULL) {
//
// do nothing for NULL argv
//
} else if (InternalIsOnCheckList(Argv[LoopCounter], CheckList, &CurrentItemType)) {
//
// We might have leftover if last parameter didnt have optional value
//
if (GetItemValue != 0) {
GetItemValue = 0;
InsertHeadList(*CheckPackage, &CurrentItemPackage->Link);
}
//
// this is a flag
//
CurrentItemPackage = AllocateZeroPool(sizeof(SHELL_PARAM_PACKAGE));
if (CurrentItemPackage == NULL) {
ShellCommandLineFreeVarList(*CheckPackage);
*CheckPackage = NULL;
return (EFI_OUT_OF_RESOURCES);
}
CurrentItemPackage->Name = AllocateZeroPool(StrSize(Argv[LoopCounter]));
if (CurrentItemPackage->Name == NULL) {
ShellCommandLineFreeVarList(*CheckPackage);
*CheckPackage = NULL;
return (EFI_OUT_OF_RESOURCES);
}
StrCpy(CurrentItemPackage->Name, Argv[LoopCounter]);
CurrentItemPackage->Type = CurrentItemType;
CurrentItemPackage->OriginalPosition = (UINTN)(-1);
CurrentItemPackage->Value = NULL;
//
// Does this flag require a value
//
switch (CurrentItemPackage->Type) {
//
// possibly trigger the next loop(s) to populate the value of this item
//
case TypeValue:
GetItemValue = 1;
ValueSize = 0;
break;
case TypeDoubleValue:
GetItemValue = 2;
ValueSize = 0;
break;
case TypeMaxValue:
GetItemValue = (UINTN)(-1);
ValueSize = 0;
break;
default:
//
// this item has no value expected; we are done
//
InsertHeadList(*CheckPackage, &CurrentItemPackage->Link);
ASSERT(GetItemValue == 0);
break;
}
} else if (GetItemValue != 0 && !InternalIsFlag(Argv[LoopCounter], AlwaysAllowNumbers)) {
ASSERT(CurrentItemPackage != NULL);
//
// get the item VALUE for a previous flag
//
CurrentItemPackage->Value = ReallocatePool(ValueSize, ValueSize + StrSize(Argv[LoopCounter]) + sizeof(CHAR16), CurrentItemPackage->Value);
ASSERT(CurrentItemPackage->Value != NULL);
if (ValueSize == 0) {
StrCpy(CurrentItemPackage->Value, Argv[LoopCounter]);
} else {
StrCat(CurrentItemPackage->Value, L" ");
StrCat(CurrentItemPackage->Value, Argv[LoopCounter]);
}
ValueSize += StrSize(Argv[LoopCounter]) + sizeof(CHAR16);
GetItemValue--;
if (GetItemValue == 0) {
InsertHeadList(*CheckPackage, &CurrentItemPackage->Link);
}
} else if (!InternalIsFlag(Argv[LoopCounter], AlwaysAllowNumbers) ){ //|| ProblemParam == NULL) {
//
// add this one as a non-flag
//
TempPointer = Argv[LoopCounter];
if ((*TempPointer == L'^' && *(TempPointer+1) == L'-')
|| (*TempPointer == L'^' && *(TempPointer+1) == L'/')
|| (*TempPointer == L'^' && *(TempPointer+1) == L'+')
){
TempPointer++;
}
CurrentItemPackage = AllocateZeroPool(sizeof(SHELL_PARAM_PACKAGE));
if (CurrentItemPackage == NULL) {
ShellCommandLineFreeVarList(*CheckPackage);
*CheckPackage = NULL;
return (EFI_OUT_OF_RESOURCES);
}
CurrentItemPackage->Name = NULL;
CurrentItemPackage->Type = TypePosition;
CurrentItemPackage->Value = AllocateZeroPool(StrSize(TempPointer));
if (CurrentItemPackage->Value == NULL) {
ShellCommandLineFreeVarList(*CheckPackage);
*CheckPackage = NULL;
return (EFI_OUT_OF_RESOURCES);
}
StrCpy(CurrentItemPackage->Value, TempPointer);
CurrentItemPackage->OriginalPosition = Count++;
InsertHeadList(*CheckPackage, &CurrentItemPackage->Link);
} else {
//
// this was a non-recognised flag... error!
//
if (ProblemParam != NULL) {
*ProblemParam = AllocateZeroPool(StrSize(Argv[LoopCounter]));
if (*ProblemParam != NULL) {
StrCpy(*ProblemParam, Argv[LoopCounter]);
}
}
ShellCommandLineFreeVarList(*CheckPackage);
*CheckPackage = NULL;
return (EFI_VOLUME_CORRUPTED);
}
}
if (GetItemValue != 0) {
GetItemValue = 0;
InsertHeadList(*CheckPackage, &CurrentItemPackage->Link);
}
//
// support for AutoPageBreak
//
if (AutoPageBreak && ShellCommandLineGetFlag(*CheckPackage, L"-b")) {
ShellSetPageBreakMode(TRUE);
}
return (EFI_SUCCESS);
}
/**
Checks the command line arguments passed against the list of valid ones.
Optionally removes NULL values first.
If no initialization is required, then return RETURN_SUCCESS.
@param[in] CheckList The pointer to list of parameters to check.
@param[out] CheckPackage The package of checked values.
@param[out] ProblemParam Optional pointer to pointer to unicode string for
the paramater that caused failure.
@param[in] AutoPageBreak Will automatically set PageBreakEnabled.
@param[in] AlwaysAllowNumbers Will never fail for number based flags.
@retval EFI_SUCCESS The operation completed sucessfully.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
@retval EFI_INVALID_PARAMETER A parameter was invalid.
@retval EFI_VOLUME_CORRUPTED The command line was corrupt.
@retval EFI_DEVICE_ERROR The commands contained 2 opposing arguments. One
of the command line arguments was returned in
ProblemParam if provided.
@retval EFI_NOT_FOUND A argument required a value that was missing.
The invalid command line argument was returned in
ProblemParam if provided.
**/
EFI_STATUS
EFIAPI
ShellCommandLineParseEx (
IN CONST SHELL_PARAM_ITEM *CheckList,
OUT LIST_ENTRY **CheckPackage,
OUT CHAR16 **ProblemParam OPTIONAL,
IN BOOLEAN AutoPageBreak,
IN BOOLEAN AlwaysAllowNumbers
)
{
//
// ASSERT that CheckList and CheckPackage aren't NULL
//
ASSERT(CheckList != NULL);
ASSERT(CheckPackage != NULL);
//
// Check for UEFI Shell 2.0 protocols
//
if (gEfiShellParametersProtocol != NULL) {
return (InternalCommandLineParse(CheckList,
CheckPackage,
ProblemParam,
AutoPageBreak,
(CONST CHAR16**) gEfiShellParametersProtocol->Argv,
gEfiShellParametersProtocol->Argc,
AlwaysAllowNumbers));
}
//
// ASSERT That EFI Shell is not required
//
ASSERT (mEfiShellInterface != NULL);
return (InternalCommandLineParse(CheckList,
CheckPackage,
ProblemParam,
AutoPageBreak,
(CONST CHAR16**) mEfiShellInterface->Argv,
mEfiShellInterface->Argc,
AlwaysAllowNumbers));
}
/**
Frees shell variable list that was returned from ShellCommandLineParse.
This function will free all the memory that was used for the CheckPackage
list of postprocessed shell arguments.
this function has no return value.
if CheckPackage is NULL, then return
@param CheckPackage the list to de-allocate
**/
VOID
EFIAPI
ShellCommandLineFreeVarList (
IN LIST_ENTRY *CheckPackage
)
{
LIST_ENTRY *Node;
//
// check for CheckPackage == NULL
//
if (CheckPackage == NULL) {
return;
}
//
// for each node in the list
//
for ( Node = GetFirstNode(CheckPackage)
; !IsListEmpty(CheckPackage)
; Node = GetFirstNode(CheckPackage)
){
//
// Remove it from the list
//
RemoveEntryList(Node);
//
// if it has a name free the name
//
if (((SHELL_PARAM_PACKAGE*)Node)->Name != NULL) {
FreePool(((SHELL_PARAM_PACKAGE*)Node)->Name);
}
//
// if it has a value free the value
//
if (((SHELL_PARAM_PACKAGE*)Node)->Value != NULL) {
FreePool(((SHELL_PARAM_PACKAGE*)Node)->Value);
}
//
// free the node structure
//
FreePool((SHELL_PARAM_PACKAGE*)Node);
}
//
// free the list head node
//
FreePool(CheckPackage);
}
/**
Checks for presence of a flag parameter
flag arguments are in the form of "-<Key>" or "/<Key>", but do not have a value following the key
if CheckPackage is NULL then return FALSE.
if KeyString is NULL then ASSERT()
@param CheckPackage The package of parsed command line arguments
@param KeyString the Key of the command line argument to check for
@retval TRUE the flag is on the command line
@retval FALSE the flag is not on the command line
**/
BOOLEAN
EFIAPI
ShellCommandLineGetFlag (
IN CONST LIST_ENTRY * CONST CheckPackage,
IN CONST CHAR16 * CONST KeyString
)
{
LIST_ENTRY *Node;
CHAR16 *TempString;
//
// return FALSE for no package or KeyString is NULL
//
if (CheckPackage == NULL || KeyString == NULL) {
return (FALSE);
}
//
// enumerate through the list of parametrs
//
for ( Node = GetFirstNode(CheckPackage)
; !IsNull (CheckPackage, Node)
; Node = GetNextNode(CheckPackage, Node)
){
//
// If the Name matches, return TRUE (and there may be NULL name)
//
if (((SHELL_PARAM_PACKAGE*)Node)->Name != NULL) {
//
// If Type is TypeStart then only compare the begining of the strings
//
if (((SHELL_PARAM_PACKAGE*)Node)->Type == TypeStart) {
if (StrnCmp(KeyString, ((SHELL_PARAM_PACKAGE*)Node)->Name, StrLen(KeyString)) == 0) {
return (TRUE);
}
TempString = NULL;
TempString = StrnCatGrow(&TempString, NULL, KeyString, StrLen(((SHELL_PARAM_PACKAGE*)Node)->Name));
if (TempString != NULL) {
if (StringNoCaseCompare(&KeyString, &((SHELL_PARAM_PACKAGE*)Node)->Name) == 0) {
FreePool(TempString);
return (TRUE);
}
FreePool(TempString);
}
} else if (StringNoCaseCompare(&KeyString, &((SHELL_PARAM_PACKAGE*)Node)->Name) == 0) {
return (TRUE);
}
}
}
return (FALSE);
}
/**
Returns value from command line argument.
Value parameters are in the form of "-<Key> value" or "/<Key> value".
If CheckPackage is NULL, then return NULL.
@param[in] CheckPackage The package of parsed command line arguments.
@param[in] KeyString The Key of the command line argument to check for.
@retval NULL The flag is not on the command line.
@retval !=NULL The pointer to unicode string of the value.
**/
CONST CHAR16*
EFIAPI
ShellCommandLineGetValue (
IN CONST LIST_ENTRY *CheckPackage,
IN CHAR16 *KeyString
)
{
LIST_ENTRY *Node;
CHAR16 *TempString;
//
// return NULL for no package or KeyString is NULL
//
if (CheckPackage == NULL || KeyString == NULL) {
return (NULL);
}
//
// enumerate through the list of parametrs
//
for ( Node = GetFirstNode(CheckPackage)
; !IsNull (CheckPackage, Node)
; Node = GetNextNode(CheckPackage, Node)
){
//
// If the Name matches, return TRUE (and there may be NULL name)
//
if (((SHELL_PARAM_PACKAGE*)Node)->Name != NULL) {
//
// If Type is TypeStart then only compare the begining of the strings
//
if (((SHELL_PARAM_PACKAGE*)Node)->Type == TypeStart) {
if (StrnCmp(KeyString, ((SHELL_PARAM_PACKAGE*)Node)->Name, StrLen(KeyString)) == 0) {
return (((SHELL_PARAM_PACKAGE*)Node)->Name + StrLen(KeyString));
}
TempString = NULL;
TempString = StrnCatGrow(&TempString, NULL, KeyString, StrLen(((SHELL_PARAM_PACKAGE*)Node)->Name));
if (TempString != NULL) {
if (StringNoCaseCompare(&KeyString, &((SHELL_PARAM_PACKAGE*)Node)->Name) == 0) {
FreePool(TempString);
return (((SHELL_PARAM_PACKAGE*)Node)->Name + StrLen(KeyString));
}
FreePool(TempString);
}
} else if (StringNoCaseCompare(&KeyString, &((SHELL_PARAM_PACKAGE*)Node)->Name) == 0) {
return (((SHELL_PARAM_PACKAGE*)Node)->Value);
}
}
}
return (NULL);
}
/**
Returns raw value from command line argument.
Raw value parameters are in the form of "value" in a specific position in the list.
If CheckPackage is NULL, then return NULL.
@param[in] CheckPackage The package of parsed command line arguments.
@param[in] Position The position of the value.
@retval NULL The flag is not on the command line.
@retval !=NULL The pointer to unicode string of the value.
**/
CONST CHAR16*
EFIAPI
ShellCommandLineGetRawValue (
IN CONST LIST_ENTRY * CONST CheckPackage,
IN UINTN Position
)
{
LIST_ENTRY *Node;
//
// check for CheckPackage == NULL
//
if (CheckPackage == NULL) {
return (NULL);
}
//
// enumerate through the list of parametrs
//
for ( Node = GetFirstNode(CheckPackage)
; !IsNull (CheckPackage, Node)
; Node = GetNextNode(CheckPackage, Node)
){
//
// If the position matches, return the value
//
if (((SHELL_PARAM_PACKAGE*)Node)->OriginalPosition == Position) {
return (((SHELL_PARAM_PACKAGE*)Node)->Value);
}
}
return (NULL);
}
/**
returns the number of command line value parameters that were parsed.
this will not include flags.
@param[in] CheckPackage The package of parsed command line arguments.
@retval (UINTN)-1 No parsing has ocurred
@return other The number of value parameters found
**/
UINTN
EFIAPI
ShellCommandLineGetCount(
IN CONST LIST_ENTRY *CheckPackage
)
{
LIST_ENTRY *Node1;
UINTN Count;
if (CheckPackage == NULL) {
return (0);
}
for ( Node1 = GetFirstNode(CheckPackage), Count = 0
; !IsNull (CheckPackage, Node1)
; Node1 = GetNextNode(CheckPackage, Node1)
){
if (((SHELL_PARAM_PACKAGE*)Node1)->Name == NULL) {
Count++;
}
}
return (Count);
}
/**
Determins if a parameter is duplicated.
If Param is not NULL then it will point to a callee allocated string buffer
with the parameter value if a duplicate is found.
If CheckPackage is NULL, then ASSERT.
@param[in] CheckPackage The package of parsed command line arguments.
@param[out] Param Upon finding one, a pointer to the duplicated parameter.
@retval EFI_SUCCESS No parameters were duplicated.
@retval EFI_DEVICE_ERROR A duplicate was found.
**/
EFI_STATUS
EFIAPI
ShellCommandLineCheckDuplicate (
IN CONST LIST_ENTRY *CheckPackage,
OUT CHAR16 **Param
)
{
LIST_ENTRY *Node1;
LIST_ENTRY *Node2;
ASSERT(CheckPackage != NULL);
for ( Node1 = GetFirstNode(CheckPackage)
; !IsNull (CheckPackage, Node1)
; Node1 = GetNextNode(CheckPackage, Node1)
){
for ( Node2 = GetNextNode(CheckPackage, Node1)
; !IsNull (CheckPackage, Node2)
; Node2 = GetNextNode(CheckPackage, Node2)
){
if ((((SHELL_PARAM_PACKAGE*)Node1)->Name != NULL) && (((SHELL_PARAM_PACKAGE*)Node2)->Name != NULL) && StrCmp(((SHELL_PARAM_PACKAGE*)Node1)->Name, ((SHELL_PARAM_PACKAGE*)Node2)->Name) == 0) {
if (Param != NULL) {
*Param = NULL;
*Param = StrnCatGrow(Param, NULL, ((SHELL_PARAM_PACKAGE*)Node1)->Name, 0);
}
return (EFI_DEVICE_ERROR);
}
}
}
return (EFI_SUCCESS);
}
/**
This is a find and replace function. Upon successful return the NewString is a copy of
SourceString with each instance of FindTarget replaced with ReplaceWith.
If SourceString and NewString overlap the behavior is undefined.
If the string would grow bigger than NewSize it will halt and return error.
@param[in] SourceString The string with source buffer.
@param[in, out] NewString The string with resultant buffer.
@param[in] NewSize The size in bytes of NewString.
@param[in] FindTarget The string to look for.
@param[in] ReplaceWith The string to replace FindTarget with.
@param[in] SkipPreCarrot If TRUE will skip a FindTarget that has a '^'
immediately before it.
@param[in] ParameterReplacing If TRUE will add "" around items with spaces.
@retval EFI_INVALID_PARAMETER SourceString was NULL.
@retval EFI_INVALID_PARAMETER NewString was NULL.
@retval EFI_INVALID_PARAMETER FindTarget was NULL.
@retval EFI_INVALID_PARAMETER ReplaceWith was NULL.
@retval EFI_INVALID_PARAMETER FindTarget had length < 1.
@retval EFI_INVALID_PARAMETER SourceString had length < 1.
@retval EFI_BUFFER_TOO_SMALL NewSize was less than the minimum size to hold
the new string (truncation occurred).
@retval EFI_SUCCESS The string was successfully copied with replacement.
**/
EFI_STATUS
EFIAPI
ShellCopySearchAndReplace(
IN CHAR16 CONST *SourceString,
IN OUT CHAR16 *NewString,
IN UINTN NewSize,
IN CONST CHAR16 *FindTarget,
IN CONST CHAR16 *ReplaceWith,
IN CONST BOOLEAN SkipPreCarrot,
IN CONST BOOLEAN ParameterReplacing
)
{
UINTN Size;
CHAR16 *Replace;
if ( (SourceString == NULL)
|| (NewString == NULL)
|| (FindTarget == NULL)
|| (ReplaceWith == NULL)
|| (StrLen(FindTarget) < 1)
|| (StrLen(SourceString) < 1)
){
return (EFI_INVALID_PARAMETER);
}
Replace = NULL;
if (StrStr(ReplaceWith, L" ") == NULL || !ParameterReplacing) {
Replace = StrnCatGrow(&Replace, NULL, ReplaceWith, 0);
} else {
Replace = AllocateZeroPool(StrSize(ReplaceWith) + 2*sizeof(CHAR16));
if (Replace != NULL) {
UnicodeSPrint(Replace, StrSize(ReplaceWith) + 2*sizeof(CHAR16), L"\"%s\"", ReplaceWith);
}
}
if (Replace == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
NewString = SetMem16(NewString, NewSize, CHAR_NULL);
while (*SourceString != CHAR_NULL) {
//
// if we find the FindTarget and either Skip == FALSE or Skip and we
// dont have a carrot do a replace...
//
if (StrnCmp(SourceString, FindTarget, StrLen(FindTarget)) == 0
&& ((SkipPreCarrot && *(SourceString-1) != L'^') || !SkipPreCarrot)
){
SourceString += StrLen(FindTarget);
Size = StrSize(NewString);
if ((Size + (StrLen(Replace)*sizeof(CHAR16))) > NewSize) {
FreePool(Replace);
return (EFI_BUFFER_TOO_SMALL);
}
StrCat(NewString, Replace);
} else {
Size = StrSize(NewString);
if (Size + sizeof(CHAR16) > NewSize) {
FreePool(Replace);
return (EFI_BUFFER_TOO_SMALL);
}
StrnCat(NewString, SourceString, 1);
SourceString++;
}
}
FreePool(Replace);
return (EFI_SUCCESS);
}
/**
Internal worker function to output a string.
This function will output a string to the correct StdOut.
@param[in] String The string to print out.
@retval EFI_SUCCESS The operation was sucessful.
@retval !EFI_SUCCESS The operation failed.
**/
EFI_STATUS
EFIAPI
InternalPrintTo (
IN CONST CHAR16 *String
)
{
UINTN Size;
Size = StrSize(String) - sizeof(CHAR16);
if (Size == 0) {
return (EFI_SUCCESS);
}
if (gEfiShellParametersProtocol != NULL) {
return (gEfiShellProtocol->WriteFile(gEfiShellParametersProtocol->StdOut, &Size, (VOID*)String));
}
if (mEfiShellInterface != NULL) {
//
// Divide in half for old shell. Must be string length not size.
//
Size /= 2;
return (mEfiShellInterface->StdOut->Write(mEfiShellInterface->StdOut, &Size, (VOID*)String));
}
ASSERT(FALSE);
return (EFI_UNSUPPORTED);
}
/**
Print at a specific location on the screen.
This function will move the cursor to a given screen location and print the specified string
If -1 is specified for either the Row or Col the current screen location for BOTH
will be used.
if either Row or Col is out of range for the current console, then ASSERT
if Format is NULL, then ASSERT
In addition to the standard %-based flags as supported by UefiLib Print() this supports
the following additional flags:
%N - Set output attribute to normal
%H - Set output attribute to highlight
%E - Set output attribute to error
%B - Set output attribute to blue color
%V - Set output attribute to green color
Note: The background color is controlled by the shell command cls.
@param[in] Col the column to print at
@param[in] Row the row to print at
@param[in] Format the format string
@param[in] Marker the marker for the variable argument list
@return EFI_SUCCESS The operation was successful.
@return EFI_DEVICE_ERROR The console device reported an error.
**/
EFI_STATUS
EFIAPI
InternalShellPrintWorker(
IN INT32 Col OPTIONAL,
IN INT32 Row OPTIONAL,
IN CONST CHAR16 *Format,
IN VA_LIST Marker
)
{
EFI_STATUS Status;
CHAR16 *ResumeLocation;
CHAR16 *FormatWalker;
UINTN OriginalAttribute;
CHAR16 *mPostReplaceFormat;
CHAR16 *mPostReplaceFormat2;
mPostReplaceFormat = AllocateZeroPool (PcdGet16 (PcdShellPrintBufferSize));
mPostReplaceFormat2 = AllocateZeroPool (PcdGet16 (PcdShellPrintBufferSize));
if (mPostReplaceFormat == NULL || mPostReplaceFormat2 == NULL) {
SHELL_FREE_NON_NULL(mPostReplaceFormat);
SHELL_FREE_NON_NULL(mPostReplaceFormat2);
return (EFI_OUT_OF_RESOURCES);
}
Status = EFI_SUCCESS;
OriginalAttribute = gST->ConOut->Mode->Attribute;
//
// Back and forth each time fixing up 1 of our flags...
//
Status = ShellCopySearchAndReplace(Format, mPostReplaceFormat, PcdGet16 (PcdShellPrintBufferSize), L"%N", L"%%N", FALSE, FALSE);
ASSERT_EFI_ERROR(Status);
Status = ShellCopySearchAndReplace(mPostReplaceFormat, mPostReplaceFormat2, PcdGet16 (PcdShellPrintBufferSize), L"%E", L"%%E", FALSE, FALSE);
ASSERT_EFI_ERROR(Status);
Status = ShellCopySearchAndReplace(mPostReplaceFormat2, mPostReplaceFormat, PcdGet16 (PcdShellPrintBufferSize), L"%H", L"%%H", FALSE, FALSE);
ASSERT_EFI_ERROR(Status);
Status = ShellCopySearchAndReplace(mPostReplaceFormat, mPostReplaceFormat2, PcdGet16 (PcdShellPrintBufferSize), L"%B", L"%%B", FALSE, FALSE);
ASSERT_EFI_ERROR(Status);
Status = ShellCopySearchAndReplace(mPostReplaceFormat2, mPostReplaceFormat, PcdGet16 (PcdShellPrintBufferSize), L"%V", L"%%V", FALSE, FALSE);
ASSERT_EFI_ERROR(Status);
//
// Use the last buffer from replacing to print from...
//
UnicodeVSPrint (mPostReplaceFormat2, PcdGet16 (PcdShellPrintBufferSize), mPostReplaceFormat, Marker);
if (Col != -1 && Row != -1) {
Status = gST->ConOut->SetCursorPosition(gST->ConOut, Col, Row);
}
FormatWalker = mPostReplaceFormat2;
while (*FormatWalker != CHAR_NULL) {
//
// Find the next attribute change request
//
ResumeLocation = StrStr(FormatWalker, L"%");
if (ResumeLocation != NULL) {
*ResumeLocation = CHAR_NULL;
}
//
// print the current FormatWalker string
//
if (StrLen(FormatWalker)>0) {
Status = InternalPrintTo(FormatWalker);
if (EFI_ERROR(Status)) {
break;
}
}
//
// update the attribute
//
if (ResumeLocation != NULL) {
if (*(ResumeLocation-1) == L'^') {
//
// Print a simple '%' symbol
//
Status = InternalPrintTo(L"%");
ResumeLocation = ResumeLocation - 1;
} else {
switch (*(ResumeLocation+1)) {
case (L'N'):
gST->ConOut->SetAttribute(gST->ConOut, OriginalAttribute);
break;
case (L'E'):
gST->ConOut->SetAttribute(gST->ConOut, EFI_TEXT_ATTR(EFI_YELLOW, ((OriginalAttribute&(BIT4|BIT5|BIT6))>>4)));
break;
case (L'H'):
gST->ConOut->SetAttribute(gST->ConOut, EFI_TEXT_ATTR(EFI_WHITE, ((OriginalAttribute&(BIT4|BIT5|BIT6))>>4)));
break;
case (L'B'):
gST->ConOut->SetAttribute(gST->ConOut, EFI_TEXT_ATTR(EFI_BLUE, ((OriginalAttribute&(BIT4|BIT5|BIT6))>>4)));
break;
case (L'V'):
gST->ConOut->SetAttribute(gST->ConOut, EFI_TEXT_ATTR(EFI_GREEN, ((OriginalAttribute&(BIT4|BIT5|BIT6))>>4)));
break;
default:
//
// Print a simple '%' symbol
//
Status = InternalPrintTo(L"%");
if (EFI_ERROR(Status)) {
break;
}
ResumeLocation = ResumeLocation - 1;
break;
}
}
} else {
//
// reset to normal now...
//
break;
}
//
// update FormatWalker to Resume + 2 (skip the % and the indicator)
//
FormatWalker = ResumeLocation + 2;
}
gST->ConOut->SetAttribute(gST->ConOut, OriginalAttribute);
SHELL_FREE_NON_NULL(mPostReplaceFormat);
SHELL_FREE_NON_NULL(mPostReplaceFormat2);
return (Status);
}
/**
Print at a specific location on the screen.
This function will move the cursor to a given screen location and print the specified string.
If -1 is specified for either the Row or Col the current screen location for BOTH
will be used.
If either Row or Col is out of range for the current console, then ASSERT.
If Format is NULL, then ASSERT.
In addition to the standard %-based flags as supported by UefiLib Print() this supports
the following additional flags:
%N - Set output attribute to normal
%H - Set output attribute to highlight
%E - Set output attribute to error
%B - Set output attribute to blue color
%V - Set output attribute to green color
Note: The background color is controlled by the shell command cls.
@param[in] Col the column to print at
@param[in] Row the row to print at
@param[in] Format the format string
@param[in] ... The variable argument list.
@return EFI_SUCCESS The printing was successful.
@return EFI_DEVICE_ERROR The console device reported an error.
**/
EFI_STATUS
EFIAPI
ShellPrintEx(
IN INT32 Col OPTIONAL,
IN INT32 Row OPTIONAL,
IN CONST CHAR16 *Format,
...
)
{
VA_LIST Marker;
EFI_STATUS RetVal;
if (Format == NULL) {
return (EFI_INVALID_PARAMETER);
}
VA_START (Marker, Format);
RetVal = InternalShellPrintWorker(Col, Row, Format, Marker);
VA_END(Marker);
return(RetVal);
}
/**
Print at a specific location on the screen.
This function will move the cursor to a given screen location and print the specified string.
If -1 is specified for either the Row or Col the current screen location for BOTH
will be used.
If either Row or Col is out of range for the current console, then ASSERT.
If Format is NULL, then ASSERT.
In addition to the standard %-based flags as supported by UefiLib Print() this supports
the following additional flags:
%N - Set output attribute to normal.
%H - Set output attribute to highlight.
%E - Set output attribute to error.
%B - Set output attribute to blue color.
%V - Set output attribute to green color.
Note: The background color is controlled by the shell command cls.
@param[in] Col The column to print at.
@param[in] Row The row to print at.
@param[in] Language The language of the string to retrieve. If this parameter
is NULL, then the current platform language is used.
@param[in] HiiFormatStringId The format string Id for getting from Hii.
@param[in] HiiFormatHandle The format string Handle for getting from Hii.
@param[in] ... The variable argument list.
@return EFI_SUCCESS The printing was successful.
@return EFI_DEVICE_ERROR The console device reported an error.
**/
EFI_STATUS
EFIAPI
ShellPrintHiiEx(
IN INT32 Col OPTIONAL,
IN INT32 Row OPTIONAL,
IN CONST CHAR8 *Language OPTIONAL,
IN CONST EFI_STRING_ID HiiFormatStringId,
IN CONST EFI_HANDLE HiiFormatHandle,
...
)
{
VA_LIST Marker;
CHAR16 *HiiFormatString;
EFI_STATUS RetVal;
VA_START (Marker, HiiFormatHandle);
HiiFormatString = HiiGetString(HiiFormatHandle, HiiFormatStringId, Language);
ASSERT(HiiFormatString != NULL);
RetVal = InternalShellPrintWorker(Col, Row, HiiFormatString, Marker);
SHELL_FREE_NON_NULL(HiiFormatString);
VA_END(Marker);
return (RetVal);
}
/**
Function to determine if a given filename represents a file or a directory.
@param[in] DirName Path to directory to test.
@retval EFI_SUCCESS The Path represents a directory
@retval EFI_NOT_FOUND The Path does not represent a directory
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
@return The path failed to open
**/
EFI_STATUS
EFIAPI
ShellIsDirectory(
IN CONST CHAR16 *DirName
)
{
EFI_STATUS Status;
SHELL_FILE_HANDLE Handle;
CHAR16 *TempLocation;
CHAR16 *TempLocation2;
ASSERT(DirName != NULL);
Handle = NULL;
TempLocation = NULL;
Status = ShellOpenFileByName(DirName, &Handle, EFI_FILE_MODE_READ, 0);
if (EFI_ERROR(Status)) {
//
// try good logic first.
//
if (gEfiShellProtocol != NULL) {
TempLocation = StrnCatGrow(&TempLocation, NULL, DirName, 0);
if (TempLocation == NULL) {
ShellCloseFile(&Handle);
return (EFI_OUT_OF_RESOURCES);
}
TempLocation2 = StrStr(TempLocation, L":");
if (TempLocation2 != NULL && StrLen(StrStr(TempLocation, L":")) == 2) {
*(TempLocation2+1) = CHAR_NULL;
}
if (gEfiShellProtocol->GetDevicePathFromMap(TempLocation) != NULL) {
FreePool(TempLocation);
return (EFI_SUCCESS);
}
FreePool(TempLocation);
} else {
//
// probably a map name?!?!!?
//
TempLocation = StrStr(DirName, L"\\");
if (TempLocation != NULL && *(TempLocation+1) == CHAR_NULL) {
return (EFI_SUCCESS);
}
}
return (Status);
}
if (FileHandleIsDirectory(Handle) == EFI_SUCCESS) {
ShellCloseFile(&Handle);
return (EFI_SUCCESS);
}
ShellCloseFile(&Handle);
return (EFI_NOT_FOUND);
}
/**
Function to determine if a given filename represents a file.
@param[in] Name Path to file to test.
@retval EFI_SUCCESS The Path represents a file.
@retval EFI_NOT_FOUND The Path does not represent a file.
@retval other The path failed to open.
**/
EFI_STATUS
EFIAPI
ShellIsFile(
IN CONST CHAR16 *Name
)
{
EFI_STATUS Status;
SHELL_FILE_HANDLE Handle;
ASSERT(Name != NULL);
Handle = NULL;
Status = ShellOpenFileByName(Name, &Handle, EFI_FILE_MODE_READ, 0);
if (EFI_ERROR(Status)) {
return (Status);
}
if (FileHandleIsDirectory(Handle) != EFI_SUCCESS) {
ShellCloseFile(&Handle);
return (EFI_SUCCESS);
}
ShellCloseFile(&Handle);
return (EFI_NOT_FOUND);
}
/**
Function to determine if a given filename represents a file.
This will search the CWD and then the Path.
If Name is NULL, then ASSERT.
@param[in] Name Path to file to test.
@retval EFI_SUCCESS The Path represents a file.
@retval EFI_NOT_FOUND The Path does not represent a file.
@retval other The path failed to open.
**/
EFI_STATUS
EFIAPI
ShellIsFileInPath(
IN CONST CHAR16 *Name
)
{
CHAR16 *NewName;
EFI_STATUS Status;
if (!EFI_ERROR(ShellIsFile(Name))) {
return (EFI_SUCCESS);
}
NewName = ShellFindFilePath(Name);
if (NewName == NULL) {
return (EFI_NOT_FOUND);
}
Status = ShellIsFile(NewName);
FreePool(NewName);
return (Status);
}
/**
Function to determine whether a string is decimal or hex representation of a number
and return the number converted from the string.
@param[in] String String representation of a number
@return the number
@retval (UINTN)(-1) An error ocurred.
**/
UINTN
EFIAPI
ShellStrToUintn(
IN CONST CHAR16 *String
)
{
UINT64 RetVal;
BOOLEAN Hex;
Hex = FALSE;
if (!InternalShellIsHexOrDecimalNumber(String, Hex, TRUE)) {
Hex = TRUE;
}
if (!EFI_ERROR(ShellConvertStringToUint64(String, &RetVal, Hex, TRUE))) {
return ((UINTN)RetVal);
}
return ((UINTN)(-1));
}
/**
Safely append with automatic string resizing given length of Destination and
desired length of copy from Source.
append the first D characters of Source to the end of Destination, where D is
the lesser of Count and the StrLen() of Source. If appending those D characters
will fit within Destination (whose Size is given as CurrentSize) and
still leave room for a NULL terminator, then those characters are appended,
starting at the original terminating NULL of Destination, and a new terminating
NULL is appended.
If appending D characters onto Destination will result in a overflow of the size
given in CurrentSize the string will be grown such that the copy can be performed
and CurrentSize will be updated to the new size.
If Source is NULL, there is nothing to append, just return the current buffer in
Destination.
if Destination is NULL, then ASSERT()
if Destination's current length (including NULL terminator) is already more then
CurrentSize, then ASSERT()
@param[in, out] Destination The String to append onto
@param[in, out] CurrentSize on call the number of bytes in Destination. On
return possibly the new size (still in bytes). if NULL
then allocate whatever is needed.
@param[in] Source The String to append from
@param[in] Count Maximum number of characters to append. if 0 then
all are appended.
@return Destination return the resultant string.
**/
CHAR16*
EFIAPI
StrnCatGrow (
IN OUT CHAR16 **Destination,
IN OUT UINTN *CurrentSize,
IN CONST CHAR16 *Source,
IN UINTN Count
)
{
UINTN DestinationStartSize;
UINTN NewSize;
//
// ASSERTs
//
ASSERT(Destination != NULL);
//
// If there's nothing to do then just return Destination
//
if (Source == NULL) {
return (*Destination);
}
//
// allow for un-initialized pointers, based on size being 0
//
if (CurrentSize != NULL && *CurrentSize == 0) {
*Destination = NULL;
}
//
// allow for NULL pointers address as Destination
//
if (*Destination != NULL) {
ASSERT(CurrentSize != 0);
DestinationStartSize = StrSize(*Destination);
ASSERT(DestinationStartSize <= *CurrentSize);
} else {
DestinationStartSize = 0;
// ASSERT(*CurrentSize == 0);
}
//
// Append all of Source?
//
if (Count == 0) {
Count = StrLen(Source);
}
//
// Test and grow if required
//
if (CurrentSize != NULL) {
NewSize = *CurrentSize;
while (NewSize < (DestinationStartSize + (Count*sizeof(CHAR16)))) {
NewSize += 2 * Count * sizeof(CHAR16);
}
*Destination = ReallocatePool(*CurrentSize, NewSize, *Destination);
*CurrentSize = NewSize;
} else {
*Destination = AllocateZeroPool((Count+1)*sizeof(CHAR16));
}
//
// Now use standard StrnCat on a big enough buffer
//
if (*Destination == NULL) {
return (NULL);
}
return StrnCat(*Destination, Source, Count);
}
/**
Prompt the user and return the resultant answer to the requestor.
This function will display the requested question on the shell prompt and then
wait for an apropriate answer to be input from the console.
if the SHELL_PROMPT_REQUEST_TYPE is SHELL_PROMPT_REQUEST_TYPE_YESNO, ShellPromptResponseTypeQuitContinue
or SHELL_PROMPT_REQUEST_TYPE_YESNOCANCEL then *Response is of type SHELL_PROMPT_RESPONSE.
if the SHELL_PROMPT_REQUEST_TYPE is ShellPromptResponseTypeFreeform then *Response is of type
CHAR16*.
In either case *Response must be callee freed if Response was not NULL;
@param Type What type of question is asked. This is used to filter the input
to prevent invalid answers to question.
@param Prompt Pointer to string prompt to use to request input.
@param Response Pointer to Response which will be populated upon return.
@retval EFI_SUCCESS The operation was sucessful.
@retval EFI_UNSUPPORTED The operation is not supported as requested.
@retval EFI_INVALID_PARAMETER A parameter was invalid.
@return other The operation failed.
**/
EFI_STATUS
EFIAPI
ShellPromptForResponse (
IN SHELL_PROMPT_REQUEST_TYPE Type,
IN CHAR16 *Prompt OPTIONAL,
IN OUT VOID **Response OPTIONAL
)
{
EFI_STATUS Status;
EFI_INPUT_KEY Key;
UINTN EventIndex;
SHELL_PROMPT_RESPONSE *Resp;
UINTN Size;
CHAR16 *Buffer;
Status = EFI_UNSUPPORTED;
Resp = NULL;
Buffer = NULL;
Size = 0;
if (Type != ShellPromptResponseTypeFreeform) {
Resp = (SHELL_PROMPT_RESPONSE*)AllocateZeroPool(sizeof(SHELL_PROMPT_RESPONSE));
if (Resp == NULL) {
return (EFI_OUT_OF_RESOURCES);
}
}
switch(Type) {
case ShellPromptResponseTypeQuitContinue:
if (Prompt != NULL) {
ShellPrintEx(-1, -1, L"%s", Prompt);
}
//
// wait for valid response
//
gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &EventIndex);
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
ASSERT_EFI_ERROR(Status);
ShellPrintEx(-1, -1, L"%c", Key.UnicodeChar);
if (Key.UnicodeChar == L'Q' || Key.UnicodeChar ==L'q') {
*Resp = ShellPromptResponseQuit;
} else {
*Resp = ShellPromptResponseContinue;
}
break;
case ShellPromptResponseTypeYesNoCancel:
if (Prompt != NULL) {
ShellPrintEx(-1, -1, L"%s", Prompt);
}
//
// wait for valid response
//
*Resp = ShellPromptResponseMax;
while (*Resp == ShellPromptResponseMax) {
gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &EventIndex);
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
ASSERT_EFI_ERROR(Status);
ShellPrintEx(-1, -1, L"%c", Key.UnicodeChar);
switch (Key.UnicodeChar) {
case L'Y':
case L'y':
*Resp = ShellPromptResponseYes;
break;
case L'N':
case L'n':
*Resp = ShellPromptResponseNo;
break;
case L'C':
case L'c':
*Resp = ShellPromptResponseCancel;
break;
}
}
break; case ShellPromptResponseTypeYesNoAllCancel:
if (Prompt != NULL) {
ShellPrintEx(-1, -1, L"%s", Prompt);
}
//
// wait for valid response
//
*Resp = ShellPromptResponseMax;
while (*Resp == ShellPromptResponseMax) {
gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &EventIndex);
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
ASSERT_EFI_ERROR(Status);
ShellPrintEx(-1, -1, L"%c", Key.UnicodeChar);
switch (Key.UnicodeChar) {
case L'Y':
case L'y':
*Resp = ShellPromptResponseYes;
break;
case L'N':
case L'n':
*Resp = ShellPromptResponseNo;
break;
case L'A':
case L'a':
*Resp = ShellPromptResponseAll;
break;
case L'C':
case L'c':
*Resp = ShellPromptResponseCancel;
break;
}
}
break;
case ShellPromptResponseTypeEnterContinue:
case ShellPromptResponseTypeAnyKeyContinue:
if (Prompt != NULL) {
ShellPrintEx(-1, -1, L"%s", Prompt);
}
//
// wait for valid response
//
*Resp = ShellPromptResponseMax;
while (*Resp == ShellPromptResponseMax) {
gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &EventIndex);
if (Type == ShellPromptResponseTypeEnterContinue) {
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
ASSERT_EFI_ERROR(Status);
ShellPrintEx(-1, -1, L"%c", Key.UnicodeChar);
if (Key.UnicodeChar == CHAR_CARRIAGE_RETURN) {
*Resp = ShellPromptResponseContinue;
break;
}
}
if (Type == ShellPromptResponseTypeAnyKeyContinue) {
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
ASSERT_EFI_ERROR(Status);
*Resp = ShellPromptResponseContinue;
break;
}
}
break;
case ShellPromptResponseTypeYesNo:
if (Prompt != NULL) {
ShellPrintEx(-1, -1, L"%s", Prompt);
}
//
// wait for valid response
//
*Resp = ShellPromptResponseMax;
while (*Resp == ShellPromptResponseMax) {
gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &EventIndex);
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
ASSERT_EFI_ERROR(Status);
ShellPrintEx(-1, -1, L"%c", Key.UnicodeChar);
switch (Key.UnicodeChar) {
case L'Y':
case L'y':
*Resp = ShellPromptResponseYes;
break;
case L'N':
case L'n':
*Resp = ShellPromptResponseNo;
break;
}
}
break;
case ShellPromptResponseTypeFreeform:
if (Prompt != NULL) {
ShellPrintEx(-1, -1, L"%s", Prompt);
}
while(1) {
gBS->WaitForEvent (1, &gST->ConIn->WaitForKey, &EventIndex);
Status = gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
ASSERT_EFI_ERROR(Status);
ShellPrintEx(-1, -1, L"%c", Key.UnicodeChar);
if (Key.UnicodeChar == CHAR_CARRIAGE_RETURN) {
break;
}
ASSERT((Buffer == NULL && Size == 0) || (Buffer != NULL));
StrnCatGrow(&Buffer, &Size, &Key.UnicodeChar, 1);
}
break;
//
// This is the location to add new prompt types.
//
default:
ASSERT(FALSE);
}
if (Response != NULL) {
if (Resp != NULL) {
*Response = Resp;
} else if (Buffer != NULL) {
*Response = Buffer;
}
} else {
if (Resp != NULL) {
FreePool(Resp);
}
if (Buffer != NULL) {
FreePool(Buffer);
}
}
ShellPrintEx(-1, -1, L"\r\n");
return (Status);
}
/**
Prompt the user and return the resultant answer to the requestor.
This function is the same as ShellPromptForResponse, except that the prompt is
automatically pulled from HII.
@param Type What type of question is asked. This is used to filter the input
to prevent invalid answers to question.
@param[in] HiiFormatStringId The format string Id for getting from Hii.
@param[in] HiiFormatHandle The format string Handle for getting from Hii.
@param Response Pointer to Response which will be populated upon return.
@retval EFI_SUCCESS the operation was sucessful.
@return other the operation failed.
@sa ShellPromptForResponse
**/
EFI_STATUS
EFIAPI
ShellPromptForResponseHii (
IN SHELL_PROMPT_REQUEST_TYPE Type,
IN CONST EFI_STRING_ID HiiFormatStringId,
IN CONST EFI_HANDLE HiiFormatHandle,
IN OUT VOID **Response
)
{
CHAR16 *Prompt;
EFI_STATUS Status;
Prompt = HiiGetString(HiiFormatHandle, HiiFormatStringId, NULL);
Status = ShellPromptForResponse(Type, Prompt, Response);
FreePool(Prompt);
return (Status);
}
/**
Function to determin if an entire string is a valid number.
If Hex it must be preceeded with a 0x or has ForceHex, set TRUE.
@param[in] String The string to evaluate.
@param[in] ForceHex TRUE - always assume hex.
@param[in] StopAtSpace TRUE to halt upon finding a space, FALSE to keep going.
@retval TRUE It is all numeric (dec/hex) characters.
@retval FALSE There is a non-numeric character.
**/
BOOLEAN
EFIAPI
InternalShellIsHexOrDecimalNumber (
IN CONST CHAR16 *String,
IN CONST BOOLEAN ForceHex,
IN CONST BOOLEAN StopAtSpace
)
{
BOOLEAN Hex;
//
// chop off a single negative sign
//
if (String != NULL && *String == L'-') {
String++;
}
if (String == NULL) {
return (FALSE);
}
//
// chop leading zeroes
//
while(String != NULL && *String == L'0'){
String++;
}
//
// allow '0x' or '0X', but not 'x' or 'X'
//
if (String != NULL && (*String == L'x' || *String == L'X')) {
if (*(String-1) != L'0') {
//
// we got an x without a preceeding 0
//
return (FALSE);
}
String++;
Hex = TRUE;
} else if (ForceHex) {
Hex = TRUE;
} else {
Hex = FALSE;
}
//
// loop through the remaining characters and use the lib function
//
for ( ; String != NULL && *String != CHAR_NULL && !(StopAtSpace && *String == L' ') ; String++){
if (Hex) {
if (!ShellIsHexaDecimalDigitCharacter(*String)) {
return (FALSE);
}
} else {
if (!ShellIsDecimalDigitCharacter(*String)) {
return (FALSE);
}
}
}
return (TRUE);
}
/**
Function to determine if a given filename exists.
@param[in] Name Path to test.
@retval EFI_SUCCESS The Path represents a file.
@retval EFI_NOT_FOUND The Path does not represent a file.
@retval other The path failed to open.
**/
EFI_STATUS
EFIAPI
ShellFileExists(
IN CONST CHAR16 *Name
)
{
EFI_STATUS Status;
EFI_SHELL_FILE_INFO *List;
ASSERT(Name != NULL);
List = NULL;
Status = ShellOpenFileMetaArg((CHAR16*)Name, EFI_FILE_MODE_READ, &List);
if (EFI_ERROR(Status)) {
return (Status);
}
ShellCloseFileMetaArg(&List);
return (EFI_SUCCESS);
}
/**
Convert a Unicode character to upper case only if
it maps to a valid small-case ASCII character.
This internal function only deal with Unicode character
which maps to a valid small-case ASCII character, i.e.
L'a' to L'z'. For other Unicode character, the input character
is returned directly.
@param Char The character to convert.
@retval LowerCharacter If the Char is with range L'a' to L'z'.
@retval Unchanged Otherwise.
**/
CHAR16
EFIAPI
InternalShellCharToUpper (
IN CHAR16 Char
)
{
if (Char >= L'a' && Char <= L'z') {
return (CHAR16) (Char - (L'a' - L'A'));
}
return Char;
}
/**
Convert a Unicode character to numerical value.
This internal function only deal with Unicode character
which maps to a valid hexadecimal ASII character, i.e.
L'0' to L'9', L'a' to L'f' or L'A' to L'F'. For other
Unicode character, the value returned does not make sense.
@param Char The character to convert.
@return The numerical value converted.
**/
UINTN
EFIAPI
InternalShellHexCharToUintn (
IN CHAR16 Char
)
{
if (ShellIsDecimalDigitCharacter (Char)) {
return Char - L'0';
}
return (UINTN) (10 + InternalShellCharToUpper (Char) - L'A');
}
/**
Convert a Null-terminated Unicode hexadecimal string to a value of type UINT64.
This function returns a value of type UINTN by interpreting the contents
of the Unicode string specified by String as a hexadecimal number.
The format of the input Unicode string String is:
[spaces][zeros][x][hexadecimal digits].
The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F].
The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix.
If "x" appears in the input string, it must be prefixed with at least one 0.
The function will ignore the pad space, which includes spaces or tab characters,
before [zeros], [x] or [hexadecimal digit]. The running zero before [x] or
[hexadecimal digit] will be ignored. Then, the decoding starts after [x] or the
first valid hexadecimal digit. Then, the function stops at the first character that is
a not a valid hexadecimal character or NULL, whichever one comes first.
If String has only pad spaces, then zero is returned.
If String has no leading pad spaces, leading zeros or valid hexadecimal digits,
then zero is returned.
@param[in] String A pointer to a Null-terminated Unicode string.
@param[out] Value Upon a successful return the value of the conversion.
@param[in] StopAtSpace FALSE to skip spaces.
@retval EFI_SUCCESS The conversion was successful.
@retval EFI_INVALID_PARAMETER A parameter was NULL or invalid.
@retval EFI_DEVICE_ERROR An overflow occured.
**/
EFI_STATUS
EFIAPI
InternalShellStrHexToUint64 (
IN CONST CHAR16 *String,
OUT UINT64 *Value,
IN CONST BOOLEAN StopAtSpace
)
{
UINT64 Result;
if (String == NULL || StrSize(String) == 0 || Value == NULL) {
return (EFI_INVALID_PARAMETER);
}
//
// Ignore the pad spaces (space or tab)
//
while ((*String == L' ') || (*String == L'\t')) {
String++;
}
//
// Ignore leading Zeros after the spaces
//
while (*String == L'0') {
String++;
}
if (InternalShellCharToUpper (*String) == L'X') {
if (*(String - 1) != L'0') {
return 0;
}
//
// Skip the 'X'
//
String++;
}
Result = 0;
//
// Skip spaces if requested
//
while (StopAtSpace && *String == L' ') {
String++;
}
while (ShellIsHexaDecimalDigitCharacter (*String)) {
//
// If the Hex Number represented by String overflows according
// to the range defined by UINTN, then ASSERT().
//
if (!(Result <= (RShiftU64((((UINT64) ~0) - InternalShellHexCharToUintn (*String)), 4)))) {
// if (!(Result <= ((((UINT64) ~0) - InternalShellHexCharToUintn (*String)) >> 4))) {
return (EFI_DEVICE_ERROR);
}
Result = (LShiftU64(Result, 4));
Result += InternalShellHexCharToUintn (*String);
String++;
//
// Skip spaces if requested
//
while (StopAtSpace && *String == L' ') {
String++;
}
}
*Value = Result;
return (EFI_SUCCESS);
}
/**
Convert a Null-terminated Unicode decimal string to a value of
type UINT64.
This function returns a value of type UINT64 by interpreting the contents
of the Unicode string specified by String as a decimal number. The format
of the input Unicode string String is:
[spaces] [decimal digits].
The valid decimal digit character is in the range [0-9]. The
function will ignore the pad space, which includes spaces or
tab characters, before [decimal digits]. The running zero in the
beginning of [decimal digits] will be ignored. Then, the function
stops at the first character that is a not a valid decimal character
or a Null-terminator, whichever one comes first.
If String has only pad spaces, then 0 is returned.
If String has no pad spaces or valid decimal digits,
then 0 is returned.
@param[in] String A pointer to a Null-terminated Unicode string.
@param[out] Value Upon a successful return the value of the conversion.
@param[in] StopAtSpace FALSE to skip spaces.
@retval EFI_SUCCESS The conversion was successful.
@retval EFI_INVALID_PARAMETER A parameter was NULL or invalid.
@retval EFI_DEVICE_ERROR An overflow occured.
**/
EFI_STATUS
EFIAPI
InternalShellStrDecimalToUint64 (
IN CONST CHAR16 *String,
OUT UINT64 *Value,
IN CONST BOOLEAN StopAtSpace
)
{
UINT64 Result;
if (String == NULL || StrSize (String) == 0 || Value == NULL) {
return (EFI_INVALID_PARAMETER);
}
//
// Ignore the pad spaces (space or tab)
//
while ((*String == L' ') || (*String == L'\t')) {
String++;
}
//
// Ignore leading Zeros after the spaces
//
while (*String == L'0') {
String++;
}
Result = 0;
//
// Skip spaces if requested
//
while (StopAtSpace && *String == L' ') {
String++;
}
while (ShellIsDecimalDigitCharacter (*String)) {
//
// If the number represented by String overflows according
// to the range defined by UINT64, then ASSERT().
//
if (!(Result <= (DivU64x32((((UINT64) ~0) - (*String - L'0')),10)))) {
return (EFI_DEVICE_ERROR);
}
Result = MultU64x32(Result, 10) + (*String - L'0');
String++;
//
// Stop at spaces if requested
//
if (StopAtSpace && *String == L' ') {
break;
}
}
*Value = Result;
return (EFI_SUCCESS);
}
/**
Function to verify and convert a string to its numerical value.
If Hex it must be preceeded with a 0x, 0X, or has ForceHex set TRUE.
@param[in] String The string to evaluate.
@param[out] Value Upon a successful return the value of the conversion.
@param[in] ForceHex TRUE - always assume hex.
@param[in] StopAtSpace FALSE to skip spaces.
@retval EFI_SUCCESS The conversion was successful.
@retval EFI_INVALID_PARAMETER String contained an invalid character.
@retval EFI_NOT_FOUND String was a number, but Value was NULL.
**/
EFI_STATUS
EFIAPI
ShellConvertStringToUint64(
IN CONST CHAR16 *String,
OUT UINT64 *Value,
IN CONST BOOLEAN ForceHex,
IN CONST BOOLEAN StopAtSpace
)
{
UINT64 RetVal;
CONST CHAR16 *Walker;
EFI_STATUS Status;
BOOLEAN Hex;
Hex = ForceHex;
if (!InternalShellIsHexOrDecimalNumber(String, Hex, StopAtSpace)) {
if (!Hex) {
Hex = TRUE;
if (!InternalShellIsHexOrDecimalNumber(String, Hex, StopAtSpace)) {
return (EFI_INVALID_PARAMETER);
}
} else {
return (EFI_INVALID_PARAMETER);
}
}
//
// Chop off leading spaces
//
for (Walker = String; Walker != NULL && *Walker != CHAR_NULL && *Walker == L' '; Walker++);
//
// make sure we have something left that is numeric.
//
if (Walker == NULL || *Walker == CHAR_NULL || !InternalShellIsHexOrDecimalNumber(Walker, Hex, StopAtSpace)) {
return (EFI_INVALID_PARAMETER);
}
//
// do the conversion.
//
if (Hex || StrnCmp(Walker, L"0x", 2) == 0 || StrnCmp(Walker, L"0X", 2) == 0){
Status = InternalShellStrHexToUint64(Walker, &RetVal, StopAtSpace);
} else {
Status = InternalShellStrDecimalToUint64(Walker, &RetVal, StopAtSpace);
}
if (Value == NULL && !EFI_ERROR(Status)) {
return (EFI_NOT_FOUND);
}
if (Value != NULL) {
*Value = RetVal;
}
return (Status);
}
/**
Function to determin if an entire string is a valid number.
If Hex it must be preceeded with a 0x or has ForceHex, set TRUE.
@param[in] String The string to evaluate.
@param[in] ForceHex TRUE - always assume hex.
@param[in] StopAtSpace TRUE to halt upon finding a space, FALSE to keep going.
@retval TRUE It is all numeric (dec/hex) characters.
@retval FALSE There is a non-numeric character.
**/
BOOLEAN
EFIAPI
ShellIsHexOrDecimalNumber (
IN CONST CHAR16 *String,
IN CONST BOOLEAN ForceHex,
IN CONST BOOLEAN StopAtSpace
)
{
if (ShellConvertStringToUint64(String, NULL, ForceHex, StopAtSpace) == EFI_NOT_FOUND) {
return (TRUE);
}
return (FALSE);
}
/**
Function to read a single line from a SHELL_FILE_HANDLE. The \n is not included in the returned
buffer. The returned buffer must be callee freed.
If the position upon start is 0, then the Ascii Boolean will be set. This should be
maintained and not changed for all operations with the same file.
@param[in] Handle SHELL_FILE_HANDLE to read from.
@param[in, out] Ascii Boolean value for indicating whether the file is
Ascii (TRUE) or UCS2 (FALSE).
@return The line of text from the file.
@retval NULL There was not enough memory available.
@sa ShellFileHandleReadLine
**/
CHAR16*
EFIAPI
ShellFileHandleReturnLine(
IN SHELL_FILE_HANDLE Handle,
IN OUT BOOLEAN *Ascii
)
{
CHAR16 *RetVal;
UINTN Size;
EFI_STATUS Status;
Size = 0;
RetVal = NULL;
Status = ShellFileHandleReadLine(Handle, RetVal, &Size, FALSE, Ascii);
if (Status == EFI_BUFFER_TOO_SMALL) {
RetVal = AllocateZeroPool(Size);
if (RetVal == NULL) {
return (NULL);
}
Status = ShellFileHandleReadLine(Handle, RetVal, &Size, FALSE, Ascii);
}
if (EFI_ERROR(Status) && (RetVal != NULL)) {
FreePool(RetVal);
RetVal = NULL;
}
return (RetVal);
}
/**
Function to read a single line (up to but not including the \n) from a SHELL_FILE_HANDLE.
If the position upon start is 0, then the Ascii Boolean will be set. This should be
maintained and not changed for all operations with the same file.
@param[in] Handle SHELL_FILE_HANDLE to read from.
@param[in, out] Buffer The pointer to buffer to read into.
@param[in, out] Size The pointer to number of bytes in Buffer.
@param[in] Truncate If the buffer is large enough, this has no effect.
If the buffer is is too small and Truncate is TRUE,
the line will be truncated.
If the buffer is is too small and Truncate is FALSE,
then no read will occur.
@param[in, out] Ascii Boolean value for indicating whether the file is
Ascii (TRUE) or UCS2 (FALSE).
@retval EFI_SUCCESS The operation was successful. The line is stored in
Buffer.
@retval EFI_INVALID_PARAMETER Handle was NULL.
@retval EFI_INVALID_PARAMETER Size was NULL.
@retval EFI_BUFFER_TOO_SMALL Size was not large enough to store the line.
Size was updated to the minimum space required.
**/
EFI_STATUS
EFIAPI
ShellFileHandleReadLine(
IN SHELL_FILE_HANDLE Handle,
IN OUT CHAR16 *Buffer,
IN OUT UINTN *Size,
IN BOOLEAN Truncate,
IN OUT BOOLEAN *Ascii
)
{
EFI_STATUS Status;
CHAR16 CharBuffer;
UINTN CharSize;
UINTN CountSoFar;
UINT64 OriginalFilePosition;
if (Handle == NULL
||Size == NULL
){
return (EFI_INVALID_PARAMETER);
}
if (Buffer == NULL) {
ASSERT(*Size == 0);
} else {
*Buffer = CHAR_NULL;
}
gEfiShellProtocol->GetFilePosition(Handle, &OriginalFilePosition);
if (OriginalFilePosition == 0) {
CharSize = sizeof(CHAR16);
Status = gEfiShellProtocol->ReadFile(Handle, &CharSize, &CharBuffer);
ASSERT_EFI_ERROR(Status);
if (CharBuffer == gUnicodeFileTag) {
*Ascii = FALSE;
} else {
*Ascii = TRUE;
gEfiShellProtocol->SetFilePosition(Handle, OriginalFilePosition);
}
}
for (CountSoFar = 0;;CountSoFar++){
CharBuffer = 0;
if (*Ascii) {
CharSize = sizeof(CHAR8);
} else {
CharSize = sizeof(CHAR16);
}
Status = gEfiShellProtocol->ReadFile(Handle, &CharSize, &CharBuffer);
if ( EFI_ERROR(Status)
|| CharSize == 0
|| (CharBuffer == L'\n' && !(*Ascii))
|| (CharBuffer == '\n' && *Ascii)
){
break;
}
//
// if we have space save it...
//
if ((CountSoFar+1)*sizeof(CHAR16) < *Size){
ASSERT(Buffer != NULL);
((CHAR16*)Buffer)[CountSoFar] = CharBuffer;
((CHAR16*)Buffer)[CountSoFar+1] = CHAR_NULL;
}
}
//
// if we ran out of space tell when...
//
if ((CountSoFar+1)*sizeof(CHAR16) > *Size){
*Size = (CountSoFar+1)*sizeof(CHAR16);
if (!Truncate) {
gEfiShellProtocol->SetFilePosition(Handle, OriginalFilePosition);
} else {
DEBUG((DEBUG_WARN, "The line was truncated in ShellFileHandleReadLine"));
}
return (EFI_BUFFER_TOO_SMALL);
}
while(Buffer[StrLen(Buffer)-1] == L'\r') {
Buffer[StrLen(Buffer)-1] = CHAR_NULL;
}
return (Status);
}
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