在windows 环境下，创建一个新的文件夹，对于我们日常生活来说，是很常见的一个操作，那么，大家有没有想过，他背后具体是怎么实现的呢？
下面就以uefi mkdir 的代码分析，讲解背后的设计哲学。
uefi shell 提供了一个类似linux shell 创建文件夹的命令
今天 就来研究一下，它的具体实现：
在shellPkg 下面，本身就有一个mkdir.c 的文件。
很明显，它调用到了一个ShellCreateDirectory的函数：
} else {ASSERT(FileHandle == NULL);//// create the directory named NewDirName//Status = ShellCreateDirectory(NewDirName, &FileHandle);if (FileHandle != NULL) {gEfiShellProtocol->CloseFile(FileHandle);}if (EFI_ERROR(Status)) {ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_MKDIR_CREATEFAIL), gShellLevel2HiiHandle, NewDirName);ShellStatus = SHELL_ACCESS_DENIED;break;}}
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));}
}
所有shellProtocol 的实现都在ShellProtocol.c 这个文件里面：
真正创建文件夹的是这一句：
Status = InternalOpenFileDevicePath(DevicePath, FileHandle, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE|EFI_FILE_MODE_CREATE, FileAttribs);
open , 听起来叫打开一个文件，可是我们仔细看，他有三种OpenMode。分别为：
接下来就是调用具的Open函数，uefi 只定义了其接口，各家可以有不同的实现方式。这里还是把Create 这个参数重点拿出来说一说，当create 被置起来的时候，这个文件就会在当前目录被创建起来。 如果文件夹下面不存在这个文件，新的文件就会被创建起来。 如果已经存在，那么就打开它。（翻译的比较生硬）。
建议直接读相应的specification
通过VS local variable 的观察， open mode 确实是这三个模式的组合。
对代码的一些具体分析：
#include "Shell.h"#define INIT_NAME_BUFFER_SIZE 128/**Close an open file handle.This function closes a specified file handle. All "dirty" cached file data isflushed to the device, and the file is closed. In all cases the handle isclosed.@param[in] FileHandle The file handle to close.@retval EFI_SUCCESS The file handle was closed successfully.
**/
EFI_STATUS
EFIAPI
EfiShellClose (IN SHELL_FILE_HANDLE FileHandle)
{ShellFileHandleRemove(FileHandle);return (FileHandleClose(ConvertShellHandleToEfiFileProtocol(FileHandle)));
}/**Internal worker to determine whether there is a BlockIo somewhereupon the device path specified.@param[in] DevicePath The device path to test.@retval TRUE gEfiBlockIoProtocolGuid was installed on a handle with this device path@retval FALSE gEfiBlockIoProtocolGuid was not found.
**/
BOOLEAN
InternalShellProtocolIsBlockIoPresent(IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath)
{EFI_DEVICE_PATH_PROTOCOL *DevicePathCopy;EFI_STATUS Status;EFI_HANDLE Handle;Handle = NULL;DevicePathCopy = (EFI_DEVICE_PATH_PROTOCOL*)DevicePath;Status = gBS->LocateDevicePath(&gEfiBlockIoProtocolGuid, &DevicePathCopy, &Handle);if ((Handle != NULL) && (!EFI_ERROR(Status))) {return (TRUE);}return (FALSE);
}/**Internal worker to determine whether there is a file system somewhereupon the device path specified.@param[in] DevicePath The device path to test.@retval TRUE gEfiSimpleFileSystemProtocolGuid was installed on a handle with this device path@retval FALSE gEfiSimpleFileSystemProtocolGuid was not found.
**/
BOOLEAN
InternalShellProtocolIsSimpleFileSystemPresent(IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath)
{EFI_DEVICE_PATH_PROTOCOL *DevicePathCopy;EFI_STATUS Status;EFI_HANDLE Handle;Handle = NULL;DevicePathCopy = (EFI_DEVICE_PATH_PROTOCOL*)DevicePath;Status = gBS->LocateDevicePath(&gEfiSimpleFileSystemProtocolGuid, &DevicePathCopy, &Handle);if ((Handle != NULL) && (!EFI_ERROR(Status))) {return (TRUE);}return (FALSE);
}/**Internal worker debug helper function to print out maps as they are added.@param[in] Mapping string mapping that has been added@param[in] DevicePath pointer to device path that has been mapped.@retval EFI_SUCCESS the operation was successful.@return other an error ocurred@sa LocateHandle@sa OpenProtocol
**/
EFI_STATUS
InternalShellProtocolDebugPrintMessage (IN CONST CHAR16 *Mapping,IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath)
{EFI_STATUS Status;CHAR16 *Temp;Status = EFI_SUCCESS;DEBUG_CODE_BEGIN();if (Mapping != NULL) {DEBUG((EFI_D_INFO, "Added new map item:\"%S\"\r\n", Mapping));}Temp = ConvertDevicePathToText(DevicePath, TRUE, TRUE);DEBUG((EFI_D_INFO, "DevicePath: %S\r\n", Temp));FreePool(Temp);DEBUG_CODE_END();return (Status);
}/**This function creates a mapping for a device path.If both DeviecPath and Mapping are NULL, this will reset the mapping to default values.@param DevicePath Points to the device path. If this is NULL and Mapping points to a valid mapping,then the mapping will be deleted.@param Mapping Points to the NULL-terminated mapping for the device path. Must end with a ':'@retval EFI_SUCCESS Mapping created or deleted successfully.@retval EFI_NO_MAPPING There is no handle that corresponds exactly to DevicePath. See theboot service function LocateDevicePath().@retval EFI_ACCESS_DENIED The mapping is a built-in alias.@retval EFI_INVALID_PARAMETER Mapping was NULL@retval EFI_INVALID_PARAMETER Mapping did not end with a ':'@retval EFI_INVALID_PARAMETER DevicePath was not pointing at a device that had a SIMPLE_FILE_SYSTEM_PROTOCOL installed.@retval EFI_NOT_FOUND There was no mapping found to delete@retval EFI_OUT_OF_RESOURCES Memory allocation failed
**/
EFI_STATUS
EFIAPI
EfiShellSetMap(IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath OPTIONAL,IN CONST CHAR16 *Mapping)
{EFI_STATUS Status;SHELL_MAP_LIST *MapListNode;if (Mapping == NULL){return (EFI_INVALID_PARAMETER);}if (Mapping[StrLen(Mapping)-1] != ':') {return (EFI_INVALID_PARAMETER);}//// Delete the mapping//if (DevicePath == NULL) {if (IsListEmpty(&gShellMapList.Link)) {return (EFI_NOT_FOUND);}for ( MapListNode = (SHELL_MAP_LIST *)GetFirstNode(&gShellMapList.Link); !IsNull(&gShellMapList.Link, &MapListNode->Link); MapListNode = (SHELL_MAP_LIST *)GetNextNode(&gShellMapList.Link, &MapListNode->Link)){if (StringNoCaseCompare(&MapListNode->MapName, &Mapping) == 0) {RemoveEntryList(&MapListNode->Link);SHELL_FREE_NON_NULL(MapListNode->DevicePath);SHELL_FREE_NON_NULL(MapListNode->MapName);SHELL_FREE_NON_NULL(MapListNode->CurrentDirectoryPath);FreePool(MapListNode);return (EFI_SUCCESS);}} // for loop//// We didnt find one to delete//return (EFI_NOT_FOUND);}//// make sure this is a valid to add device path/////@todo add BlockIo to this test...if (!InternalShellProtocolIsSimpleFileSystemPresent(DevicePath)&& !InternalShellProtocolIsBlockIoPresent(DevicePath)) {return (EFI_INVALID_PARAMETER);}//// First make sure there is no old mapping//Status = EfiShellSetMap(NULL, Mapping);if ((Status != EFI_SUCCESS) && (Status != EFI_NOT_FOUND)) {return (Status);}//// now add the new one.//Status = ShellCommandAddMapItemAndUpdatePath(Mapping, DevicePath, 0, FALSE);return(Status);
}/**Gets the device path from the mapping.This function gets the device path associated with a mapping.@param Mapping A pointer to the mapping@retval !=NULL Pointer to the device path that corresponds to thedevice mapping. The returned pointer does not needto be freed.@retval NULL There is no device path associated with thespecified mapping.
**/
CONST EFI_DEVICE_PATH_PROTOCOL *
EFIAPI
EfiShellGetDevicePathFromMap(IN CONST CHAR16 *Mapping)
{SHELL_MAP_LIST *MapListItem;CHAR16 *NewName;UINTN Size;NewName = NULL;Size = 0;StrnCatGrow(&NewName, &Size, Mapping, 0);if (Mapping[StrLen(Mapping)-1] != L':') {StrnCatGrow(&NewName, &Size, L":", 0);}MapListItem = ShellCommandFindMapItem(NewName);FreePool(NewName);if (MapListItem != NULL) {return (MapListItem->DevicePath);}return(NULL);
}/**Gets the mapping(s) that most closely matches the device path.This function gets the mapping which corresponds to the device path *DevicePath. Ifthere is no exact match, then the mapping which most closely matches *DevicePathis returned, and *DevicePath is updated to point to the remaining portion of thedevice path. If there is an exact match, the mapping is returned and *DevicePathpoints to the end-of-device-path node.If there are multiple map names they will be semi-colon seperated in theNULL-terminated string.@param DevicePath On entry, points to a device path pointer. Onexit, updates the pointer to point to theportion of the device path after the mapping.@retval NULL No mapping was found.@return !=NULL Pointer to NULL-terminated mapping. The bufferis callee allocated and should be freed by the caller.
**/
CONST CHAR16 *
EFIAPI
EfiShellGetMapFromDevicePath(IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath)
{SHELL_MAP_LIST *Node;CHAR16 *PathForReturn;UINTN PathSize;
// EFI_HANDLE PathHandle;
// EFI_HANDLE MapHandle;
// EFI_STATUS Status;
// EFI_DEVICE_PATH_PROTOCOL *DevicePathCopy;
// EFI_DEVICE_PATH_PROTOCOL *MapPathCopy;if (DevicePath == NULL || *DevicePath == NULL) {return (NULL);}PathForReturn = NULL;PathSize = 0;for ( Node = (SHELL_MAP_LIST *)GetFirstNode(&gShellMapList.Link); !IsNull(&gShellMapList.Link, &Node->Link); Node = (SHELL_MAP_LIST *)GetNextNode(&gShellMapList.Link, &Node->Link)){//// check for exact match//if (DevicePathCompare(DevicePath, &Node->DevicePath) == 0) {ASSERT((PathForReturn == NULL && PathSize == 0) || (PathForReturn != NULL));if (PathSize != 0) {PathForReturn = StrnCatGrow(&PathForReturn, &PathSize, L";", 0);}PathForReturn = StrnCatGrow(&PathForReturn, &PathSize, Node->MapName, 0);}}if (PathForReturn != NULL) {while (!IsDevicePathEndType (*DevicePath)) {*DevicePath = NextDevicePathNode (*DevicePath);}SetDevicePathEndNode (*DevicePath);}
/*///@todo finish code for inexact matches.if (PathForReturn == NULL) {PathSize = 0;DevicePathCopy = DuplicateDevicePath(*DevicePath);ASSERT(DevicePathCopy != NULL);Status = gBS->LocateDevicePath(&gEfiSimpleFileSystemProtocolGuid, &DevicePathCopy, &PathHandle);ASSERT_EFI_ERROR(Status);//// check each of the device paths we have to get the root of the path for consist mappings//for ( Node = (SHELL_MAP_LIST *)GetFirstNode(&gShellMapList.Link); !IsNull(&gShellMapList.Link, &Node->Link); Node = (SHELL_MAP_LIST *)GetNextNode(&gShellMapList.Link, &Node->Link)){if ((Node->Flags & SHELL_MAP_FLAGS_CONSIST) == 0) {continue;}MapPathCopy = DuplicateDevicePath(Node->DevicePath);ASSERT(MapPathCopy != NULL);Status = gBS->LocateDevicePath(&gEfiSimpleFileSystemProtocolGuid, &MapPathCopy, &MapHandle);if (MapHandle == PathHandle) {*DevicePath = DevicePathCopy;MapPathCopy = NULL;DevicePathCopy = NULL;PathForReturn = StrnCatGrow(&PathForReturn, &PathSize, Node->MapName, 0);PathForReturn = StrnCatGrow(&PathForReturn, &PathSize, L";", 0);break;}}//// now add on the non-consistent mappings//for ( Node = (SHELL_MAP_LIST *)GetFirstNode(&gShellMapList.Link); !IsNull(&gShellMapList.Link, &Node->Link); Node = (SHELL_MAP_LIST *)GetNextNode(&gShellMapList.Link, &Node->Link)){if ((Node->Flags & SHELL_MAP_FLAGS_CONSIST) != 0) {continue;}MapPathCopy = Node->DevicePath;ASSERT(MapPathCopy != NULL);Status = gBS->LocateDevicePath(&gEfiSimpleFileSystemProtocolGuid, &MapPathCopy, &MapHandle);if (MapHandle == PathHandle) {PathForReturn = StrnCatGrow(&PathForReturn, &PathSize, Node->MapName, 0);PathForReturn = StrnCatGrow(&PathForReturn, &PathSize, L";", 0);break;}}}
*/return (AddBufferToFreeList(PathForReturn));
}/**Converts a device path to a file system-style path.This function converts a device path to a file system path by replacing part, or all, ofthe device path with the file-system mapping. If there are more than one applicationfile system mappings, the one that most closely matches Path will be used.@param Path The pointer to the device path@retval NULL the device path could not be found.@return all The pointer of the NULL-terminated file path. The pathis callee-allocated and should be freed by the caller.
**/
CHAR16 *
EFIAPI
EfiShellGetFilePathFromDevicePath(IN CONST EFI_DEVICE_PATH_PROTOCOL *Path)
{EFI_DEVICE_PATH_PROTOCOL *DevicePathCopy;EFI_DEVICE_PATH_PROTOCOL *MapPathCopy;SHELL_MAP_LIST *MapListItem;CHAR16 *PathForReturn;UINTN PathSize;EFI_HANDLE PathHandle;EFI_HANDLE MapHandle;EFI_STATUS Status;FILEPATH_DEVICE_PATH *FilePath;FILEPATH_DEVICE_PATH *AlignedNode;PathForReturn = NULL;PathSize = 0;DevicePathCopy = (EFI_DEVICE_PATH_PROTOCOL*)Path;ASSERT(DevicePathCopy != NULL);if (DevicePathCopy == NULL) {return (NULL);}///@todo BlockIo?Status = gBS->LocateDevicePath(&gEfiSimpleFileSystemProtocolGuid, &DevicePathCopy, &PathHandle);if (EFI_ERROR(Status)) {return (NULL);}//// check each of the device paths we have to get the root of the path//for ( MapListItem = (SHELL_MAP_LIST *)GetFirstNode(&gShellMapList.Link); !IsNull(&gShellMapList.Link, &MapListItem->Link); MapListItem = (SHELL_MAP_LIST *)GetNextNode(&gShellMapList.Link, &MapListItem->Link)){MapPathCopy = (EFI_DEVICE_PATH_PROTOCOL*)MapListItem->DevicePath;ASSERT(MapPathCopy != NULL);///@todo BlockIo?Status = gBS->LocateDevicePath(&gEfiSimpleFileSystemProtocolGuid, &MapPathCopy, &MapHandle);if (MapHandle == PathHandle) {ASSERT((PathForReturn == NULL && PathSize == 0) || (PathForReturn != NULL));PathForReturn = StrnCatGrow(&PathForReturn, &PathSize, MapListItem->MapName, 0);//// go through all the remaining nodes in the device path//for ( FilePath = (FILEPATH_DEVICE_PATH*)DevicePathCopy; !IsDevicePathEnd (&FilePath->Header); FilePath = (FILEPATH_DEVICE_PATH*)NextDevicePathNode (&FilePath->Header)){//// If any node is not a file path node, then the conversion can not be completed//if ((DevicePathType(&FilePath->Header) != MEDIA_DEVICE_PATH) ||(DevicePathSubType(&FilePath->Header) != MEDIA_FILEPATH_DP)) {FreePool(PathForReturn);return NULL;}//// append the path part onto the filepath.//ASSERT((PathForReturn == NULL && PathSize == 0) || (PathForReturn != NULL));AlignedNode = AllocateCopyPool (DevicePathNodeLength(FilePath), FilePath);if (AlignedNode == NULL) {FreePool (PathForReturn);return NULL;}// File Path Device Path Nodes 'can optionally add a "\" separator to// the beginning and/or the end of the Path Name string.'// (UEFI Spec 2.4 section 9.3.6.4).// If necessary, add a "\", but otherwise don't// (This is specified in the above section, and also implied by the// UEFI Shell spec section 3.7)if ((PathSize != 0) &&(PathForReturn != NULL) &&(PathForReturn[PathSize - 1] != L'\\') &&(AlignedNode->PathName[0] != L'\\')) {PathForReturn = StrnCatGrow (&PathForReturn, &PathSize, L"\\", 1);}PathForReturn = StrnCatGrow(&PathForReturn, &PathSize, AlignedNode->PathName, 0);FreePool(AlignedNode);} // for loop of remaining nodes}if (PathForReturn != NULL) {break;}} // for loop of paths to checkreturn(PathForReturn);
}/**Converts a file system style name to a device path.This function converts a file system style name to a device path, by replacing anymapping references to the associated device path.@param[in] Path The pointer to the path.@return The pointer of the file path. The file path is calleeallocated and should be freed by the caller.@retval NULL The path could not be found.@retval NULL There was not enough available memory.
**/
EFI_DEVICE_PATH_PROTOCOL *
EFIAPI
EfiShellGetDevicePathFromFilePath(IN CONST CHAR16 *Path)
{CHAR16 *MapName;CHAR16 *NewPath;CONST CHAR16 *Cwd;UINTN Size;CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath;EFI_DEVICE_PATH_PROTOCOL *DevicePathCopy;EFI_DEVICE_PATH_PROTOCOL *DevicePathCopyForFree;EFI_DEVICE_PATH_PROTOCOL *DevicePathForReturn;EFI_HANDLE Handle;EFI_STATUS Status;if (Path == NULL) {return (NULL);}MapName = NULL;NewPath = NULL;if (StrStr(Path, L":") == NULL) {Cwd = EfiShellGetCurDir(NULL);if (Cwd == NULL) {return (NULL);}Size = StrSize(Cwd) + StrSize(Path);NewPath = AllocateZeroPool(Size);if (NewPath == NULL) {return (NULL);}StrCpyS(NewPath, Size/sizeof(CHAR16), Cwd);StrCatS(NewPath, Size/sizeof(CHAR16), L"\\");if (*Path == L'\\') {Path++;while (PathRemoveLastItem(NewPath)) ;}StrCatS(NewPath, Size/sizeof(CHAR16), Path);DevicePathForReturn = EfiShellGetDevicePathFromFilePath(NewPath);FreePool(NewPath);return (DevicePathForReturn);}Size = 0;//// find the part before (but including) the : for the map name//ASSERT((MapName == NULL && Size == 0) || (MapName != NULL));MapName = StrnCatGrow(&MapName, &Size, Path, (StrStr(Path, L":")-Path+1));if (MapName == NULL || MapName[StrLen(MapName)-1] != L':') {return (NULL);}//// look up the device path in the map//DevicePath = EfiShellGetDevicePathFromMap(MapName);if (DevicePath == NULL) {//// Must have been a bad Mapname//return (NULL);}//// make a copy for LocateDevicePath to modify (also save a pointer to call FreePool with)//DevicePathCopyForFree = DevicePathCopy = DuplicateDevicePath(DevicePath);if (DevicePathCopy == NULL) {FreePool(MapName);return (NULL);}//// get the handle/////@todo BlockIo?Status = gBS->LocateDevicePath(&gEfiSimpleFileSystemProtocolGuid, &DevicePathCopy, &Handle);if (EFI_ERROR(Status)) {if (DevicePathCopyForFree != NULL) {FreePool(DevicePathCopyForFree);}FreePool(MapName);return (NULL);}//// build the full device path//if (*(Path+StrLen(MapName)+1) == CHAR_NULL) {DevicePathForReturn = FileDevicePath(Handle, L"\\");} else {DevicePathForReturn = FileDevicePath(Handle, Path+StrLen(MapName));}FreePool(MapName);if (DevicePathCopyForFree != NULL) {FreePool(DevicePathCopyForFree);}return (DevicePathForReturn);
}/**Gets the name of the device specified by the device handle.This function gets the user-readable name of the device specified by the devicehandle. If no user-readable name could be generated, then *BestDeviceName will beNULL and EFI_NOT_FOUND will be returned.If EFI_DEVICE_NAME_USE_COMPONENT_NAME is set, then the function will return thedevice's name using the EFI_COMPONENT_NAME2_PROTOCOL, if present onDeviceHandle.If EFI_DEVICE_NAME_USE_DEVICE_PATH is set, then the function will return thedevice's name using the EFI_DEVICE_PATH_PROTOCOL, if present on DeviceHandle.If both EFI_DEVICE_NAME_USE_COMPONENT_NAME andEFI_DEVICE_NAME_USE_DEVICE_PATH are set, thenEFI_DEVICE_NAME_USE_COMPONENT_NAME will have higher priority.@param DeviceHandle The handle of the device.@param Flags Determines the possible sources of component names.Valid bits are:EFI_DEVICE_NAME_USE_COMPONENT_NAMEEFI_DEVICE_NAME_USE_DEVICE_PATH@param Language A pointer to the language specified for the devicename, in the same format as described in the UEFIspecification, Appendix M@param BestDeviceName On return, points to the callee-allocated NULL-terminated name of the device. If no device namecould be found, points to NULL. The name must befreed by the caller...@retval EFI_SUCCESS Get the name successfully.@retval EFI_NOT_FOUND Fail to get the device name.@retval EFI_INVALID_PARAMETER Flags did not have a valid bit set.@retval EFI_INVALID_PARAMETER BestDeviceName was NULL@retval EFI_INVALID_PARAMETER DeviceHandle was NULL
**/
EFI_STATUS
EFIAPI
EfiShellGetDeviceName(IN EFI_HANDLE DeviceHandle,IN EFI_SHELL_DEVICE_NAME_FLAGS Flags,IN CHAR8 *Language,OUT CHAR16 **BestDeviceName)
{EFI_STATUS Status;EFI_COMPONENT_NAME2_PROTOCOL *CompName2;EFI_DEVICE_PATH_PROTOCOL *DevicePath;EFI_HANDLE *HandleList;UINTN HandleCount;UINTN LoopVar;CHAR16 *DeviceNameToReturn;CHAR8 *Lang;UINTN ParentControllerCount;EFI_HANDLE *ParentControllerBuffer;UINTN ParentDriverCount;EFI_HANDLE *ParentDriverBuffer;if (BestDeviceName == NULL ||DeviceHandle == NULL){return (EFI_INVALID_PARAMETER);}//// make sure one of the 2 supported bits is on//if (((Flags & EFI_DEVICE_NAME_USE_COMPONENT_NAME) == 0) &&((Flags & EFI_DEVICE_NAME_USE_DEVICE_PATH) == 0)) {return (EFI_INVALID_PARAMETER);}DeviceNameToReturn = NULL;*BestDeviceName = NULL;HandleList = NULL;HandleCount = 0;Lang = NULL;if ((Flags & EFI_DEVICE_NAME_USE_COMPONENT_NAME) != 0) {Status = ParseHandleDatabaseByRelationship(NULL,DeviceHandle,HR_DRIVER_BINDING_HANDLE|HR_DEVICE_DRIVER,&HandleCount,&HandleList);for (LoopVar = 0; LoopVar < HandleCount ; LoopVar++){//// Go through those handles until we get one that passes for GetComponentName//Status = gBS->OpenProtocol(HandleList[LoopVar],&gEfiComponentName2ProtocolGuid,(VOID**)&CompName2,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);if (EFI_ERROR(Status)) {Status = gBS->OpenProtocol(HandleList[LoopVar],&gEfiComponentNameProtocolGuid,(VOID**)&CompName2,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);}if (EFI_ERROR(Status)) {continue;}Lang = GetBestLanguageForDriver(CompName2->SupportedLanguages, Language, FALSE);Status = CompName2->GetControllerName(CompName2, DeviceHandle, NULL, Lang, &DeviceNameToReturn);FreePool(Lang);Lang = NULL;if (!EFI_ERROR(Status) && DeviceNameToReturn != NULL) {break;}}if (HandleList != NULL) {FreePool(HandleList);}//// Now check the parent controller using this as the child.//if (DeviceNameToReturn == NULL){PARSE_HANDLE_DATABASE_PARENTS(DeviceHandle, &ParentControllerCount, &ParentControllerBuffer);for (LoopVar = 0 ; LoopVar < ParentControllerCount ; LoopVar++) {PARSE_HANDLE_DATABASE_UEFI_DRIVERS(ParentControllerBuffer[LoopVar], &ParentDriverCount, &ParentDriverBuffer);for (HandleCount = 0 ; HandleCount < ParentDriverCount ; HandleCount++) {//// try using that driver's component name with controller and our driver as the child.//Status = gBS->OpenProtocol(ParentDriverBuffer[HandleCount],&gEfiComponentName2ProtocolGuid,(VOID**)&CompName2,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);if (EFI_ERROR(Status)) {Status = gBS->OpenProtocol(ParentDriverBuffer[HandleCount],&gEfiComponentNameProtocolGuid,(VOID**)&CompName2,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);}if (EFI_ERROR(Status)) {continue;}Lang = GetBestLanguageForDriver(CompName2->SupportedLanguages, Language, FALSE);Status = CompName2->GetControllerName(CompName2, ParentControllerBuffer[LoopVar], DeviceHandle, Lang, &DeviceNameToReturn);FreePool(Lang);Lang = NULL;if (!EFI_ERROR(Status) && DeviceNameToReturn != NULL) {break;}}SHELL_FREE_NON_NULL(ParentDriverBuffer);if (!EFI_ERROR(Status) && DeviceNameToReturn != NULL) {break;}}SHELL_FREE_NON_NULL(ParentControllerBuffer);}//// dont return on fail since we will try device path if that bit is on//if (DeviceNameToReturn != NULL){ASSERT(BestDeviceName != NULL);StrnCatGrow(BestDeviceName, NULL, DeviceNameToReturn, 0);return (EFI_SUCCESS);}}if ((Flags & EFI_DEVICE_NAME_USE_DEVICE_PATH) != 0) {Status = gBS->OpenProtocol(DeviceHandle,&gEfiDevicePathProtocolGuid,(VOID**)&DevicePath,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);if (!EFI_ERROR(Status)) {//// use device path to text on the device path//*BestDeviceName = ConvertDevicePathToText(DevicePath, TRUE, TRUE);return (EFI_SUCCESS);}}//// none of the selected bits worked.//return (EFI_NOT_FOUND);
}/**Opens the root directory of a device on a handleThis function opens the root directory of a device and returns a file handle to it.@param DeviceHandle The handle of the device that contains the volume.@param FileHandle On exit, points to the file handle corresponding to the root directory on thedevice.@retval EFI_SUCCESS Root opened successfully.@retval EFI_NOT_FOUND EFI_SIMPLE_FILE_SYSTEM could not be found or the root directorycould not be opened.@retval EFI_VOLUME_CORRUPTED The data structures in the volume were corrupted.@retval EFI_DEVICE_ERROR The device had an error
**/
EFI_STATUS
EFIAPI
EfiShellOpenRootByHandle(IN EFI_HANDLE DeviceHandle,OUT SHELL_FILE_HANDLE *FileHandle)
{EFI_STATUS Status;EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFileSystem;EFI_FILE_PROTOCOL *RealFileHandle;EFI_DEVICE_PATH_PROTOCOL *DevPath;//// get the simple file system interface//Status = gBS->OpenProtocol(DeviceHandle,&gEfiSimpleFileSystemProtocolGuid,(VOID**)&SimpleFileSystem,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);if (EFI_ERROR(Status)) {return (EFI_NOT_FOUND);}Status = gBS->OpenProtocol(DeviceHandle,&gEfiDevicePathProtocolGuid,(VOID**)&DevPath,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);if (EFI_ERROR(Status)) {return (EFI_NOT_FOUND);}//// Open the root volume now...//Status = SimpleFileSystem->OpenVolume(SimpleFileSystem, &RealFileHandle);*FileHandle = ConvertEfiFileProtocolToShellHandle(RealFileHandle, EfiShellGetMapFromDevicePath(&DevPath));return (Status);
}/**Opens the root directory of a device.This function opens the root directory of a device and returns a file handle to it.@param DevicePath Points to the device path corresponding to the device where theEFI_SIMPLE_FILE_SYSTEM_PROTOCOL is installed.@param FileHandle On exit, points to the file handle corresponding to the root directory on thedevice.@retval EFI_SUCCESS Root opened successfully.@retval EFI_NOT_FOUND EFI_SIMPLE_FILE_SYSTEM could not be found or the root directorycould not be opened.@retval EFI_VOLUME_CORRUPTED The data structures in the volume were corrupted.@retval EFI_DEVICE_ERROR The device had an error@retval EFI_INVALID_PARAMETER FileHandle is NULL.
**/
EFI_STATUS
EFIAPI
EfiShellOpenRoot(IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,OUT SHELL_FILE_HANDLE *FileHandle)
{EFI_STATUS Status;EFI_HANDLE Handle;if (FileHandle == NULL) {return (EFI_INVALID_PARAMETER);}// 找到这个device 的handle// find the handle of the device with that device handle and the file system/////@todo BlockIo?// 通过这个gEfiSimpleFileSystemProtocolGuid，找出持有这个guid的hanle/*在WinNtSimpleFileSystem.c 会以gEfiSimpleFileSystemProtocolGuid 为guid安装 Private->SimpleFileSystemStatus = gBS->InstallMultipleProtocolInterfaces (&ControllerHandle,&gEfiSimpleFileSystemProtocolGuid,&Private->SimpleFileSystem,NULL);就是在这个安装过程中，filesystem的每个成员有了具体值PrivateFile->EfiFile.Open = WinNtSimpleFileSystemOpen;PrivateFile->EfiFile.Close = WinNtSimpleFileSystemClose;PrivateFile->EfiFile.Delete = WinNtSimpleFileSystemDelete;PrivateFile->EfiFile.Read = WinNtSimpleFileSystemRead;PrivateFile->EfiFile.Write = WinNtSimpleFileSystemWrite;PrivateFile->EfiFile.GetPosition = WinNtSimpleFileSystemGetPosition;PrivateFile->EfiFile.SetPosition = WinNtSimpleFileSystemSetPosition;PrivateFile->EfiFile.GetInfo = WinNtSimpleFileSystemGetInfo;PrivateFile->EfiFile.SetInfo = WinNtSimpleFileSystemSetInfo;PrivateFile->EfiFile.Flush = WinNtSimpleFileSystemFlush;PrivateFile->IsValidFindBuf = FALSE;*/Status = gBS->LocateDevicePath(&gEfiSimpleFileSystemProtocolGuid,&DevicePath,&Handle);if (EFI_ERROR(Status)) {return (EFI_NOT_FOUND);}return (EfiShellOpenRootByHandle(Handle, FileHandle));
}/**Returns whether any script files are currently being processed.@retval TRUE There is at least one script file active.@retval FALSE No script files are active now.**/
BOOLEAN
EFIAPI
EfiShellBatchIsActive (VOID)
{if (ShellCommandGetCurrentScriptFile() == NULL) {return (FALSE);}return (TRUE);
}/**Worker function to open a file based on a device path. this will open the rootof the volume and then traverse down to the file itself.@param DevicePath Device Path of the file.@param FileHandle Pointer to the file upon a successful return.@param OpenMode mode to open file in.@param Attributes the File Attributes to use when creating a new file.@retval EFI_SUCCESS the file is open and FileHandle is valid@retval EFI_UNSUPPORTED the device path cotained non-path elements@retval other an error ocurred.
**/
EFI_STATUS
InternalOpenFileDevicePath(IN OUT EFI_DEVICE_PATH_PROTOCOL *DevicePath,OUT SHELL_FILE_HANDLE *FileHandle,IN UINT64 OpenMode,IN UINT64 Attributes OPTIONAL)
{EFI_STATUS Status;FILEPATH_DEVICE_PATH *FilePathNode;EFI_HANDLE Handle;SHELL_FILE_HANDLE ShellHandle;EFI_FILE_PROTOCOL *Handle1;EFI_FILE_PROTOCOL *Handle2;FILEPATH_DEVICE_PATH *AlignedNode;if (FileHandle == NULL) {return (EFI_INVALID_PARAMETER);}*FileHandle = NULL;Handle1 = NULL;Handle2 = NULL;Handle = NULL;ShellHandle = NULL;FilePathNode = NULL;AlignedNode = NULL;/*说明shellHandle 上面就有相应的打开函数*/Status = EfiShellOpenRoot(DevicePath, &ShellHandle);if (!EFI_ERROR(Status)) {Handle1 = ConvertShellHandleToEfiFileProtocol(ShellHandle);if (Handle1 != NULL) {//// chop off the begining part before the file system part.../////@todo BlockIo?Status = gBS->LocateDevicePath(&gEfiSimpleFileSystemProtocolGuid,&DevicePath,&Handle);if (!EFI_ERROR(Status)) {//// To access as a file system, the file path should only// contain file path components. Follow the file path nodes// and find the target file//for ( FilePathNode = (FILEPATH_DEVICE_PATH *)DevicePath; !IsDevicePathEnd (&FilePathNode->Header); FilePathNode = (FILEPATH_DEVICE_PATH *) NextDevicePathNode (&FilePathNode->Header)){SHELL_FREE_NON_NULL(AlignedNode);AlignedNode = AllocateCopyPool (DevicePathNodeLength(FilePathNode), FilePathNode);//// For file system access each node should be a file path component//if (DevicePathType (&FilePathNode->Header) != MEDIA_DEVICE_PATH ||DevicePathSubType (&FilePathNode->Header) != MEDIA_FILEPATH_DP) {Status = EFI_UNSUPPORTED;break;}//// Open this file path node//Handle2 = Handle1;Handle1 = NULL;/*此时handle上面*///// if this is the last node in the DevicePath always create (if that was requested).//if (IsDevicePathEnd ((NextDevicePathNode (&FilePathNode->Header)))) {Status = Handle2->Open (Handle2,&Handle1,AlignedNode->PathName,OpenMode,Attributes);} else {//// This is not the last node and we dont want to 'create' existing// directory entries...////// open without letting it create// prevents error on existing files/directories//Status = Handle2->Open (Handle2,&Handle1,AlignedNode->PathName,OpenMode &~EFI_FILE_MODE_CREATE,Attributes);//// if above failed now open and create the 'item'// if OpenMode EFI_FILE_MODE_CREATE bit was on (but disabled above)//if ((EFI_ERROR (Status)) && ((OpenMode & EFI_FILE_MODE_CREATE) != 0)) {Status = Handle2->Open (Handle2,&Handle1,AlignedNode->PathName,OpenMode,Attributes);}}//// Close the last node//ShellInfoObject.NewEfiShellProtocol->CloseFile (Handle2);//// If there's been an error, stop//if (EFI_ERROR (Status)) {break;}} // for loop}}}SHELL_FREE_NON_NULL(AlignedNode);if (EFI_ERROR(Status)) {if (Handle1 != NULL) {ShellInfoObject.NewEfiShellProtocol->CloseFile(Handle1);}} else {*FileHandle = ConvertEfiFileProtocolToShellHandle(Handle1, ShellFileHandleGetPath(ShellHandle));}return (Status);
}/**Creates a file or directory by name.This function creates an empty new file or directory with the specified attributes andreturns the new file's handle. If the file already exists and is read-only, thenEFI_INVALID_PARAMETER will be returned.If the file already existed, it is truncated and its attributes updated. If the file iscreated successfully, the FileHandle is the file's handle, else, the FileHandle is NULL.If the file name begins with >v, then the file handle which is returned refers to theshell environment variable with the specified name. If the shell environment variablealready exists and is non-volatile then EFI_INVALID_PARAMETER is returned.@param FileName Pointer to NULL-terminated file path@param FileAttribs The new file's attrbiutes. the different attributes aredescribed in EFI_FILE_PROTOCOL.Open().@param FileHandle On return, points to the created file handle or directory's handle@retval EFI_SUCCESS The file was opened. FileHandle points to the new file's handle.@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 devide, or could notfile the file system 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 nolonger supported.@retval EFI_DEVICE_ERROR The device reported an error or can't get the file path accordingthe DirName.@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.@retval EFI_WRITE_PROTECTED An attempt was made to create a file, or open a file for writewhen the media is write-protected.@retval EFI_ACCESS_DENIED The service denied access to the file.@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
EfiShellCreateFile(IN CONST CHAR16 *FileName,IN UINT64 FileAttribs,OUT SHELL_FILE_HANDLE *FileHandle)
{EFI_DEVICE_PATH_PROTOCOL *DevicePath;EFI_STATUS Status;BOOLEAN Volatile;//// Is this for an environment variable// do we start with >v//if (StrStr(FileName, L">v") == FileName) {Status = IsVolatileEnv (FileName + 2, &Volatile);if (EFI_ERROR (Status)) {return Status;}if (!Volatile) {return (EFI_INVALID_PARAMETER);}*FileHandle = CreateFileInterfaceEnv(FileName+2);return (EFI_SUCCESS);}//// We are opening a regular file.//DevicePath = EfiShellGetDevicePathFromFilePath(FileName);if (DevicePath == NULL) {return (EFI_NOT_FOUND);}__asm int 3;// the following function will create the folder ?Status = InternalOpenFileDevicePath(DevicePath, FileHandle, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE|EFI_FILE_MODE_CREATE, FileAttribs);FreePool(DevicePath);return(Status);
}/**Register a GUID and a localized human readable name for it.If Guid is not assigned a name, then assign GuidName to Guid. This list of GUIDnames must be used whenever a shell command outputs GUID information.This function is only available when the major and minor versions in theEfiShellProtocol are greater than or equal to 2 and 1, respectively.@param[in] Guid A pointer to the GUID being registered.@param[in] GuidName A pointer to the localized name for the GUID being registered.@retval EFI_SUCCESS The operation was successful.@retval EFI_INVALID_PARAMETER Guid was NULL.@retval EFI_INVALID_PARAMETER GuidName was NULL.@retval EFI_ACCESS_DENIED Guid already is assigned a name.
**/
EFI_STATUS
EFIAPI
EfiShellRegisterGuidName(IN CONST EFI_GUID *Guid,IN CONST CHAR16 *GuidName)
{return (AddNewGuidNameMapping(Guid, GuidName, NULL));
}/**Opens a file or a directory by file name.This function opens the specified file in the specified OpenMode and returns a filehandle.If the file name begins with >v, then the file handle which is returned refers to theshell environment variable with the specified name. If the shell environment variableexists, is non-volatile and the OpenMode indicates EFI_FILE_MODE_WRITE, thenEFI_INVALID_PARAMETER is returned.If the file name is >i, then the file handle which is returned refers to the standardinput. If the OpenMode indicates EFI_FILE_MODE_WRITE, then EFI_INVALID_PARAMETERis returned.If the file name is >o, then the file handle which is returned refers to the standardoutput. If the OpenMode indicates EFI_FILE_MODE_READ, then EFI_INVALID_PARAMETERis returned.If the file name is >e, then the file handle which is returned refers to the standarderror. If the OpenMode indicates EFI_FILE_MODE_READ, then EFI_INVALID_PARAMETERis returned.If the file name is NUL, then the file handle that is returned refers to the standard NULfile. If the OpenMode indicates EFI_FILE_MODE_READ, then EFI_INVALID_PARAMETER isreturned.If return EFI_SUCCESS, the FileHandle is the opened file's handle, else, theFileHandle is NULL.@param FileName Points to the NULL-terminated UCS-2 encoded file name.@param FileHandle On return, points to the file handle.@param OpenMode File open mode. Either EFI_FILE_MODE_READ orEFI_FILE_MODE_WRITE from section 12.4 of the UEFISpecification.@retval EFI_SUCCESS The file was opened. FileHandle has the opened file's handle.@retval EFI_INVALID_PARAMETER One of the parameters has an invalid value. FileHandle is NULL.@retval EFI_UNSUPPORTED Could not open the file path. FileHandle is NULL.@retval EFI_NOT_FOUND The specified file could not be found on the device or the filesystem could not be found on the device. FileHandle is NULL.@retval EFI_NO_MEDIA The device has no medium. FileHandle is NULL.@retval EFI_MEDIA_CHANGED The device has a different medium in it or the medium is nolonger supported. FileHandle is NULL.@retval EFI_DEVICE_ERROR The device reported an error or can't get the file path accordingthe FileName. FileHandle is NULL.@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted. FileHandle is NULL.@retval EFI_WRITE_PROTECTED An attempt was made to create a file, or open a file for writewhen the media is write-protected. FileHandle is NULL.@retval EFI_ACCESS_DENIED The service denied access to the file. FileHandle is NULL.@retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the file. FileHandleis NULL.@retval EFI_VOLUME_FULL The volume is full. FileHandle is NULL.
**/
EFI_STATUS
EFIAPI
EfiShellOpenFileByName(IN CONST CHAR16 *FileName,OUT SHELL_FILE_HANDLE *FileHandle,IN UINT64 OpenMode)
{EFI_DEVICE_PATH_PROTOCOL *DevicePath;EFI_STATUS Status;BOOLEAN Volatile;*FileHandle = NULL;//// Is this for StdIn//if (StrCmp(FileName, L">i") == 0) {//// make sure not writing to StdIn//if ((OpenMode & EFI_FILE_MODE_WRITE) != 0) {return (EFI_INVALID_PARAMETER);}*FileHandle = ShellInfoObject.NewShellParametersProtocol->StdIn;ASSERT(*FileHandle != NULL);return (EFI_SUCCESS);}//// Is this for StdOut//if (StrCmp(FileName, L">o") == 0) {//// make sure not writing to StdIn//if ((OpenMode & EFI_FILE_MODE_READ) != 0) {return (EFI_INVALID_PARAMETER);}*FileHandle = &FileInterfaceStdOut;return (EFI_SUCCESS);}//// Is this for NUL / NULL file//if ((gUnicodeCollation->StriColl (gUnicodeCollation, (CHAR16*)FileName, L"NUL") == 0) ||(gUnicodeCollation->StriColl (gUnicodeCollation, (CHAR16*)FileName, L"NULL") == 0)) {*FileHandle = &FileInterfaceNulFile;return (EFI_SUCCESS);}//// Is this for StdErr//if (StrCmp(FileName, L">e") == 0) {//// make sure not writing to StdIn//if ((OpenMode & EFI_FILE_MODE_READ) != 0) {return (EFI_INVALID_PARAMETER);}*FileHandle = &FileInterfaceStdErr;return (EFI_SUCCESS);}//// Is this for an environment variable// do we start with >v//if (StrStr(FileName, L">v") == FileName) {Status = IsVolatileEnv (FileName + 2, &Volatile);if (EFI_ERROR (Status)) {return Status;}if (!Volatile &&((OpenMode & EFI_FILE_MODE_WRITE) != 0)) {return (EFI_INVALID_PARAMETER);}*FileHandle = CreateFileInterfaceEnv(FileName+2);return (EFI_SUCCESS);}//// We are opening a regular file.//DevicePath = EfiShellGetDevicePathFromFilePath(FileName);
// DEBUG_CODE(InternalShellProtocolDebugPrintMessage (NULL, DevicePath););if (DevicePath == NULL) {return (EFI_NOT_FOUND);}//// Copy the device path, open the file, then free the memory//Status = InternalOpenFileDevicePath(DevicePath, FileHandle, OpenMode, 0); // 0 = no specific file attributesFreePool(DevicePath);return(Status);
}/**Deletes the file specified by the file name.This function deletes a file.@param FileName Points to the NULL-terminated file name.@retval EFI_SUCCESS The file was closed and deleted, and the handle was closed.@retval EFI_WARN_DELETE_FAILURE The handle was closed but the file was not deleted.@sa EfiShellCreateFile
**/
EFI_STATUS
EFIAPI
EfiShellDeleteFileByName(IN CONST CHAR16 *FileName)
{SHELL_FILE_HANDLE FileHandle;EFI_STATUS Status;FileHandle = NULL;//// get a handle to the file//Status = EfiShellCreateFile(FileName,0,&FileHandle);if (EFI_ERROR(Status)) {return (Status);}//// now delete the file//ShellFileHandleRemove(FileHandle);return (ShellInfoObject.NewEfiShellProtocol->DeleteFile(FileHandle));
}/**Disables the page break output mode.
**/
VOID
EFIAPI
EfiShellDisablePageBreak (VOID)
{ShellInfoObject.PageBreakEnabled = FALSE;
}/**Enables the page break output mode.
**/
VOID
EFIAPI
EfiShellEnablePageBreak (VOID)
{ShellInfoObject.PageBreakEnabled = TRUE;
}/**internal worker function to load and run an image via device path.@param ParentImageHandle A handle of the image that is executing the specifiedcommand line.@param DevicePath device path of the file to execute@param CommandLine Points to the NULL-terminated UCS-2 encoded stringcontaining the command line. If NULL then the command-line will be empty.@param Environment Points to a NULL-terminated array of environmentvariables with the format 'x=y', where x is theenvironment variable name and y is the value. If thisis NULL, then the current shell environment is used.@param[out] StartImageStatus Returned status from gBS->StartImage.@retval EFI_SUCCESS The command executed successfully. The status codereturned by the command is pointed to by StatusCode.@retval EFI_INVALID_PARAMETER The parameters are invalid.@retval EFI_OUT_OF_RESOURCES Out of resources.@retval EFI_UNSUPPORTED Nested shell invocations are not allowed.
**/
EFI_STATUS
InternalShellExecuteDevicePath(IN CONST EFI_HANDLE *ParentImageHandle,IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,IN CONST CHAR16 *CommandLine OPTIONAL,IN CONST CHAR16 **Environment OPTIONAL,OUT EFI_STATUS *StartImageStatus OPTIONAL)
{EFI_STATUS Status;EFI_STATUS StartStatus;EFI_STATUS CleanupStatus;EFI_HANDLE NewHandle;EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;LIST_ENTRY OrigEnvs;EFI_SHELL_PARAMETERS_PROTOCOL ShellParamsProtocol;CHAR16 *ImagePath;UINTN Index;CHAR16 *Walker;CHAR16 *NewCmdLine;if (ParentImageHandle == NULL) {return (EFI_INVALID_PARAMETER);}InitializeListHead(&OrigEnvs);ZeroMem(&ShellParamsProtocol, sizeof(EFI_SHELL_PARAMETERS_PROTOCOL));NewHandle = NULL;NewCmdLine = AllocateCopyPool (StrSize (CommandLine), CommandLine);if (NewCmdLine == NULL) {return EFI_OUT_OF_RESOURCES;}for (Walker = NewCmdLine; Walker != NULL && *Walker != CHAR_NULL ; Walker++) {if (*Walker == L'^' && *(Walker+1) == L'#') {CopyMem(Walker, Walker+1, StrSize(Walker) - sizeof(Walker[0]));}}//// Load the image with:// FALSE - not from boot manager and NULL, 0 being not already in memory//Status = gBS->LoadImage(FALSE,*ParentImageHandle,(EFI_DEVICE_PATH_PROTOCOL*)DevicePath,NULL,0,&NewHandle);if (EFI_ERROR(Status)) {if (NewHandle != NULL) {gBS->UnloadImage(NewHandle);}FreePool (NewCmdLine);return (Status);}Status = gBS->OpenProtocol(NewHandle,&gEfiLoadedImageProtocolGuid,(VOID**)&LoadedImage,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);if (!EFI_ERROR(Status)) {//// If the image is not an app abort it.//if (LoadedImage->ImageCodeType != EfiLoaderCode){ShellPrintHiiEx(-1, -1, NULL,STRING_TOKEN (STR_SHELL_IMAGE_NOT_APP),ShellInfoObject.HiiHandle);goto UnloadImage;}ASSERT(LoadedImage->LoadOptionsSize == 0);if (NewCmdLine != NULL) {LoadedImage->LoadOptionsSize = (UINT32)StrSize(NewCmdLine);LoadedImage->LoadOptions = (VOID*)NewCmdLine;}//// Save our current environment settings for later restoration if necessary//if (Environment != NULL) {Status = GetEnvironmentVariableList(&OrigEnvs);if (!EFI_ERROR(Status)) {Status = SetEnvironmentVariables(Environment);}}//// Initialize and install a shell parameters protocol on the image.//ShellParamsProtocol.StdIn = ShellInfoObject.NewShellParametersProtocol->StdIn;ShellParamsProtocol.StdOut = ShellInfoObject.NewShellParametersProtocol->StdOut;ShellParamsProtocol.StdErr = ShellInfoObject.NewShellParametersProtocol->StdErr;Status = UpdateArgcArgv(&ShellParamsProtocol, NewCmdLine, Efi_Application, NULL, NULL);ASSERT_EFI_ERROR(Status);//// Replace Argv[0] with the full path of the binary we're executing:// If the command line was "foo", the binary might be called "foo.efi".// "The first entry in [Argv] is always the full file path of the// executable" - UEFI Shell Spec section 2.3//ImagePath = EfiShellGetFilePathFromDevicePath (DevicePath);// The image we're executing isn't necessarily in a filesystem - it might// be memory mapped. In this case EfiShellGetFilePathFromDevicePath will// return NULL, and we'll leave Argv[0] as UpdateArgcArgv set it.if (ImagePath != NULL) {if (ShellParamsProtocol.Argv == NULL) {// Command line was empty or null.// (UpdateArgcArgv sets Argv to NULL when CommandLine is "" or NULL)ShellParamsProtocol.Argv = AllocatePool (sizeof (CHAR16 *));if (ShellParamsProtocol.Argv == NULL) {Status = EFI_OUT_OF_RESOURCES;goto UnloadImage;}ShellParamsProtocol.Argc = 1;} else {// Free the string UpdateArgcArgv put in Argv[0];FreePool (ShellParamsProtocol.Argv[0]);}ShellParamsProtocol.Argv[0] = ImagePath;}Status = gBS->InstallProtocolInterface(&NewHandle, &gEfiShellParametersProtocolGuid, EFI_NATIVE_INTERFACE, &ShellParamsProtocol);ASSERT_EFI_ERROR(Status);///@todo initialize and install ShellInterface protocol on the new image for compatibility if - PcdGetBool(PcdShellSupportOldProtocols)//// now start the image and if the caller wanted the return code pass it to them...//if (!EFI_ERROR(Status)) {StartStatus = gBS->StartImage(NewHandle,0,NULL);if (StartImageStatus != NULL) {*StartImageStatus = StartStatus;}CleanupStatus = gBS->UninstallProtocolInterface(NewHandle,&gEfiShellParametersProtocolGuid,&ShellParamsProtocol);ASSERT_EFI_ERROR(CleanupStatus);goto FreeAlloc;}UnloadImage:// Unload image - We should only get here if we didn't call StartImagegBS->UnloadImage (NewHandle);FreeAlloc:// Free Argv (Allocated in UpdateArgcArgv)if (ShellParamsProtocol.Argv != NULL) {for (Index = 0; Index < ShellParamsProtocol.Argc; Index++) {if (ShellParamsProtocol.Argv[Index] != NULL) {FreePool (ShellParamsProtocol.Argv[Index]);}}FreePool (ShellParamsProtocol.Argv);}}// Restore environment variablesif (!IsListEmpty(&OrigEnvs)) {CleanupStatus = SetEnvironmentVariableList(&OrigEnvs);ASSERT_EFI_ERROR (CleanupStatus);}FreePool (NewCmdLine);return(Status);
}/**internal worker function to load and run an image in the current shell.@param CommandLine Points to the NULL-terminated UCS-2 encoded stringcontaining the command line. If NULL then the command-line will be empty.@param Environment Points to a NULL-terminated array of environmentvariables with the format 'x=y', where x is theenvironment variable name and y is the value. If thisis NULL, then the current shell environment is used.@param[out] StartImageStatus Returned status from the command line.@retval EFI_SUCCESS The command executed successfully. The status codereturned by the command is pointed to by StatusCode.@retval EFI_INVALID_PARAMETER The parameters are invalid.@retval EFI_OUT_OF_RESOURCES Out of resources.@retval EFI_UNSUPPORTED Nested shell invocations are not allowed.
**/
EFI_STATUS
InternalShellExecute(IN CONST CHAR16 *CommandLine OPTIONAL,IN CONST CHAR16 **Environment OPTIONAL,OUT EFI_STATUS *StartImageStatus OPTIONAL)
{EFI_STATUS Status;EFI_STATUS CleanupStatus;LIST_ENTRY OrigEnvs;InitializeListHead(&OrigEnvs);//// Save our current environment settings for later restoration if necessary//if (Environment != NULL) {Status = GetEnvironmentVariableList(&OrigEnvs);if (!EFI_ERROR(Status)) {Status = SetEnvironmentVariables(Environment);} else {return Status;}}Status = RunShellCommand(CommandLine, StartImageStatus);// Restore environment variablesif (!IsListEmpty(&OrigEnvs)) {CleanupStatus = SetEnvironmentVariableList(&OrigEnvs);ASSERT_EFI_ERROR (CleanupStatus);}return(Status);
}/**Determine if the UEFI Shell is currently running with nesting enabled or disabled.@retval FALSE nesting is required@retval other nesting is enabled
**/
STATIC
BOOLEAN
NestingEnabled(
)
{EFI_STATUS Status;CHAR16 *Temp;CHAR16 *Temp2;UINTN TempSize;BOOLEAN RetVal;RetVal = TRUE;Temp = NULL;Temp2 = NULL;if (ShellInfoObject.ShellInitSettings.BitUnion.Bits.NoNest) {TempSize = 0;Temp = NULL;Status = SHELL_GET_ENVIRONMENT_VARIABLE(mNoNestingEnvVarName, &TempSize, Temp);if (Status == EFI_BUFFER_TOO_SMALL) {Temp = AllocateZeroPool(TempSize + sizeof(CHAR16));if (Temp != NULL) {Status = SHELL_GET_ENVIRONMENT_VARIABLE(mNoNestingEnvVarName, &TempSize, Temp);}}Temp2 = StrnCatGrow(&Temp2, NULL, mNoNestingTrue, 0);if (Temp != NULL && Temp2 != NULL && StringNoCaseCompare(&Temp, &Temp2) == 0) {//// Use the no nesting method.//RetVal = FALSE;}}SHELL_FREE_NON_NULL(Temp);SHELL_FREE_NON_NULL(Temp2);return (RetVal);
}/**Execute the command line.This function creates a nested instance of the shell and executes the specifiedcommand (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 madeby the commands executed will be reflected in the current environment. If theEnvironment is non-NULL, then the changes made will be discarded.The CommandLine is executed from the current working directory on the currentdevice.@param ParentImageHandle A handle of the image that is executing the specifiedcommand line.@param CommandLine Points to the NULL-terminated UCS-2 encoded stringcontaining the command line. If NULL then the command-line will be empty.@param Environment Points to a NULL-terminated array of environmentvariables with the format 'x=y', where x is theenvironment variable name and y is the value. If thisis NULL, then the current shell environment is used.@param StatusCode Points to the status code returned by the CommandLine.@retval EFI_SUCCESS The command executed successfully. The status codereturned by the command is pointed to by StatusCode.@retval EFI_INVALID_PARAMETER The parameters are invalid.@retval EFI_OUT_OF_RESOURCES Out of resources.@retval EFI_UNSUPPORTED Nested shell invocations are not allowed.@retval EFI_UNSUPPORTED The support level required for this function is not present.@sa InternalShellExecuteDevicePath
**/
EFI_STATUS
EFIAPI
EfiShellExecute(IN EFI_HANDLE *ParentImageHandle,IN CHAR16 *CommandLine OPTIONAL,IN CHAR16 **Environment OPTIONAL,OUT EFI_STATUS *StatusCode OPTIONAL)
{EFI_STATUS Status;CHAR16 *Temp;EFI_DEVICE_PATH_PROTOCOL *DevPath;UINTN Size;if ((PcdGet8(PcdShellSupportLevel) < 1)) {return (EFI_UNSUPPORTED);}if (NestingEnabled()) {DevPath = AppendDevicePath (ShellInfoObject.ImageDevPath, ShellInfoObject.FileDevPath);DEBUG_CODE_BEGIN();Temp = ConvertDevicePathToText(ShellInfoObject.FileDevPath, TRUE, TRUE);FreePool(Temp);Temp = ConvertDevicePathToText(ShellInfoObject.ImageDevPath, TRUE, TRUE);FreePool(Temp);Temp = ConvertDevicePathToText(DevPath, TRUE, TRUE);FreePool(Temp);DEBUG_CODE_END();Temp = NULL;Size = 0;ASSERT((Temp == NULL && Size == 0) || (Temp != NULL));StrnCatGrow(&Temp, &Size, L"Shell.efi -_exit ", 0);StrnCatGrow(&Temp, &Size, CommandLine, 0);Status = InternalShellExecuteDevicePath(ParentImageHandle,DevPath,Temp,(CONST CHAR16**)Environment,StatusCode);//// de-allocate and return//FreePool(DevPath);FreePool(Temp);} else {Status = InternalShellExecute((CONST CHAR16*)CommandLine,(CONST CHAR16**)Environment,StatusCode);}return(Status);
}/**Utility cleanup function for EFI_SHELL_FILE_INFO objects.1) frees all pointers (non-NULL)2) Closes the SHELL_FILE_HANDLE@param FileListNode pointer to the list node to free
**/
VOID
InternalFreeShellFileInfoNode(IN EFI_SHELL_FILE_INFO *FileListNode)
{if (FileListNode->Info != NULL) {FreePool((VOID*)FileListNode->Info);}if (FileListNode->FileName != NULL) {FreePool((VOID*)FileListNode->FileName);}if (FileListNode->FullName != NULL) {FreePool((VOID*)FileListNode->FullName);}if (FileListNode->Handle != NULL) {ShellInfoObject.NewEfiShellProtocol->CloseFile(FileListNode->Handle);}FreePool(FileListNode);
}
/**Frees the file list.This function cleans up the file list and any related data structures. It has noimpact on the files themselves.@param FileList The file list to free. Type EFI_SHELL_FILE_INFO isdefined in OpenFileList()@retval EFI_SUCCESS Free the file list successfully.@retval EFI_INVALID_PARAMETER FileList was NULL or *FileList was NULL;
**/
EFI_STATUS
EFIAPI
EfiShellFreeFileList(IN EFI_SHELL_FILE_INFO **FileList)
{EFI_SHELL_FILE_INFO *ShellFileListItem;if (FileList == NULL || *FileList == NULL) {return (EFI_INVALID_PARAMETER);}for ( ShellFileListItem = (EFI_SHELL_FILE_INFO*)GetFirstNode(&(*FileList)->Link); !IsListEmpty(&(*FileList)->Link); ShellFileListItem = (EFI_SHELL_FILE_INFO*)GetFirstNode(&(*FileList)->Link)){RemoveEntryList(&ShellFileListItem->Link);InternalFreeShellFileInfoNode(ShellFileListItem);}InternalFreeShellFileInfoNode(*FileList);*FileList = NULL;return(EFI_SUCCESS);
}/**Deletes the duplicate file names files in the given file list.This function deletes the reduplicate files in the given file list.@param FileList A pointer to the first entry in the file list.@retval EFI_SUCCESS Always success.@retval EFI_INVALID_PARAMETER FileList was NULL or *FileList was NULL;
**/
EFI_STATUS
EFIAPI
EfiShellRemoveDupInFileList(IN EFI_SHELL_FILE_INFO **FileList)
{EFI_SHELL_FILE_INFO *ShellFileListItem;EFI_SHELL_FILE_INFO *ShellFileListItem2;EFI_SHELL_FILE_INFO *TempNode;if (FileList == NULL || *FileList == NULL) {return (EFI_INVALID_PARAMETER);}for ( ShellFileListItem = (EFI_SHELL_FILE_INFO*)GetFirstNode(&(*FileList)->Link); !IsNull(&(*FileList)->Link, &ShellFileListItem->Link); ShellFileListItem = (EFI_SHELL_FILE_INFO*)GetNextNode(&(*FileList)->Link, &ShellFileListItem->Link)){for ( ShellFileListItem2 = (EFI_SHELL_FILE_INFO*)GetNextNode(&(*FileList)->Link, &ShellFileListItem->Link); !IsNull(&(*FileList)->Link, &ShellFileListItem2->Link); ShellFileListItem2 = (EFI_SHELL_FILE_INFO*)GetNextNode(&(*FileList)->Link, &ShellFileListItem2->Link)){if (gUnicodeCollation->StriColl(gUnicodeCollation,(CHAR16*)ShellFileListItem->FullName,(CHAR16*)ShellFileListItem2->FullName) == 0){TempNode = (EFI_SHELL_FILE_INFO *)GetPreviousNode(&(*FileList)->Link,&ShellFileListItem2->Link);RemoveEntryList(&ShellFileListItem2->Link);InternalFreeShellFileInfoNode(ShellFileListItem2);// Set ShellFileListItem2 to PreviousNode so we don't access Freed// memory in GetNextNode in the loop expression above.ShellFileListItem2 = TempNode;}}}return (EFI_SUCCESS);
}//
// This is the same structure as the external version, but it has no CONST qualifiers.
//
typedef struct {LIST_ENTRY Link; ///< Linked list members.EFI_STATUS Status; ///< Status of opening the file. Valid only if Handle != NULL.CHAR16 *FullName; ///< Fully qualified filename.CHAR16 *FileName; ///< name of this file.SHELL_FILE_HANDLE Handle; ///< Handle for interacting with the opened file or NULL if closed.EFI_FILE_INFO *Info; ///< Pointer to the FileInfo struct for this file or NULL.
} EFI_SHELL_FILE_INFO_NO_CONST;/**Allocates and duplicates a EFI_SHELL_FILE_INFO node.@param[in] Node The node to copy from.@param[in] Save TRUE to set Node->Handle to NULL, FALSE otherwise.@retval NULL a memory allocation error ocurred@return != NULL a pointer to the new node
**/
EFI_SHELL_FILE_INFO*
InternalDuplicateShellFileInfo(IN EFI_SHELL_FILE_INFO *Node,IN BOOLEAN Save)
{EFI_SHELL_FILE_INFO_NO_CONST *NewNode;//// try to confirm that the objects are in sync//ASSERT(sizeof(EFI_SHELL_FILE_INFO_NO_CONST) == sizeof(EFI_SHELL_FILE_INFO));NewNode = AllocateZeroPool(sizeof(EFI_SHELL_FILE_INFO));if (NewNode == NULL) {return (NULL);}NewNode->FullName = AllocateCopyPool(StrSize(Node->FullName), Node->FullName);NewNode->FileName = AllocateCopyPool(StrSize(Node->FileName), Node->FileName);NewNode->Info = AllocateCopyPool((UINTN)Node->Info->Size, Node->Info);if ( NewNode->FullName == NULL|| NewNode->FileName == NULL|| NewNode->Info == NULL){SHELL_FREE_NON_NULL(NewNode->FullName);SHELL_FREE_NON_NULL(NewNode->FileName);SHELL_FREE_NON_NULL(NewNode->Info);SHELL_FREE_NON_NULL(NewNode);return(NULL);}NewNode->Status = Node->Status;NewNode->Handle = Node->Handle;if (!Save) {Node->Handle = NULL;}return((EFI_SHELL_FILE_INFO*)NewNode);
}/**Allocates and populates a EFI_SHELL_FILE_INFO structure. if any memory operationfailed it will return NULL.@param[in] BasePath the Path to prepend onto filename for FullPath@param[in] Status Status member initial value.@param[in] FileName FileName member initial value.@param[in] Handle Handle member initial value.@param[in] Info Info struct to copy.@retval NULL An error ocurred.@return a pointer to the newly allocated structure.
**/
EFI_SHELL_FILE_INFO *
CreateAndPopulateShellFileInfo(IN CONST CHAR16 *BasePath,IN CONST EFI_STATUS Status,IN CONST CHAR16 *FileName,IN CONST SHELL_FILE_HANDLE Handle,IN CONST EFI_FILE_INFO *Info)
{EFI_SHELL_FILE_INFO *ShellFileListItem;CHAR16 *TempString;UINTN Size;TempString = NULL;Size = 0;ShellFileListItem = AllocateZeroPool(sizeof(EFI_SHELL_FILE_INFO));if (ShellFileListItem == NULL) {return (NULL);}if (Info != NULL && Info->Size != 0) {ShellFileListItem->Info = AllocateZeroPool((UINTN)Info->Size);if (ShellFileListItem->Info == NULL) {FreePool(ShellFileListItem);return (NULL);}CopyMem(ShellFileListItem->Info, Info, (UINTN)Info->Size);} else {ShellFileListItem->Info = NULL;}if (FileName != NULL) {ASSERT(TempString == NULL);ShellFileListItem->FileName = StrnCatGrow(&TempString, 0, FileName, 0);if (ShellFileListItem->FileName == NULL) {FreePool(ShellFileListItem->Info);FreePool(ShellFileListItem);return (NULL);}} else {ShellFileListItem->FileName = NULL;}Size = 0;TempString = NULL;if (BasePath != NULL) {ASSERT((TempString == NULL && Size == 0) || (TempString != NULL));TempString = StrnCatGrow(&TempString, &Size, BasePath, 0);if (TempString == NULL) {FreePool((VOID*)ShellFileListItem->FileName);SHELL_FREE_NON_NULL(ShellFileListItem->Info);FreePool(ShellFileListItem);return (NULL);}}if (ShellFileListItem->FileName != NULL) {ASSERT((TempString == NULL && Size == 0) || (TempString != NULL));TempString = StrnCatGrow(&TempString, &Size, ShellFileListItem->FileName, 0);if (TempString == NULL) {FreePool((VOID*)ShellFileListItem->FileName);FreePool(ShellFileListItem->Info);FreePool(ShellFileListItem);return (NULL);}}TempString = PathCleanUpDirectories(TempString);ShellFileListItem->FullName = TempString;ShellFileListItem->Status = Status;ShellFileListItem->Handle = Handle;return (ShellFileListItem);
}/**Find all files in a specified directory.@param FileDirHandle Handle of the directory to search.@param FileList On return, points to the list of files in the directoryor NULL if there are no files in the directory.@retval EFI_SUCCESS File information was returned successfully.@retval EFI_VOLUME_CORRUPTED The file system structures have been corrupted.@retval EFI_DEVICE_ERROR The device reported an error.@retval EFI_NO_MEDIA The device media is not present.@retval EFI_INVALID_PARAMETER The FileDirHandle was not a directory.@return An error from FileHandleGetFileName().
**/
EFI_STATUS
EFIAPI
EfiShellFindFilesInDir(IN SHELL_FILE_HANDLE FileDirHandle,OUT EFI_SHELL_FILE_INFO **FileList)
{EFI_SHELL_FILE_INFO *ShellFileList;EFI_SHELL_FILE_INFO *ShellFileListItem;EFI_FILE_INFO *FileInfo;EFI_STATUS Status;BOOLEAN NoFile;CHAR16 *TempString;CHAR16 *BasePath;UINTN Size;CHAR16 *TempSpot;BasePath = NULL;Status = FileHandleGetFileName(FileDirHandle, &BasePath);if (EFI_ERROR(Status)) {return (Status);}if (ShellFileHandleGetPath(FileDirHandle) != NULL) {TempString = NULL;Size = 0;TempString = StrnCatGrow(&TempString, &Size, ShellFileHandleGetPath(FileDirHandle), 0);if (TempString == NULL) {SHELL_FREE_NON_NULL(BasePath);return (EFI_OUT_OF_RESOURCES);}TempSpot = StrStr(TempString, L";");if (TempSpot != NULL) {*TempSpot = CHAR_NULL;}TempString = StrnCatGrow(&TempString, &Size, BasePath, 0);if (TempString == NULL) {SHELL_FREE_NON_NULL(BasePath);return (EFI_OUT_OF_RESOURCES);}SHELL_FREE_NON_NULL(BasePath);BasePath = TempString;}NoFile = FALSE;ShellFileList = NULL;ShellFileListItem = NULL;FileInfo = NULL;Status = EFI_SUCCESS;for ( Status = FileHandleFindFirstFile(FileDirHandle, &FileInfo); !EFI_ERROR(Status) && !NoFile; Status = FileHandleFindNextFile(FileDirHandle, FileInfo, &NoFile)){if (ShellFileList == NULL) {ShellFileList = (EFI_SHELL_FILE_INFO*)AllocateZeroPool(sizeof(EFI_SHELL_FILE_INFO));if (ShellFileList == NULL) {SHELL_FREE_NON_NULL (BasePath);return EFI_OUT_OF_RESOURCES;}InitializeListHead(&ShellFileList->Link);}//// allocate a new EFI_SHELL_FILE_INFO and populate it...//ShellFileListItem = CreateAndPopulateShellFileInfo(BasePath,EFI_SUCCESS, // success since we didnt fail to open it...FileInfo->FileName,NULL, // no handle since not openFileInfo);if (ShellFileListItem == NULL) {Status = EFI_OUT_OF_RESOURCES;//// Free resources outside the loop.//break;}InsertTailList(&ShellFileList->Link, &ShellFileListItem->Link);}if (EFI_ERROR(Status)) {EfiShellFreeFileList(&ShellFileList);*FileList = NULL;} else {*FileList = ShellFileList;}SHELL_FREE_NON_NULL(BasePath);return(Status);
}/**Get the GUID value from a human readable name.If GuidName is a known GUID name, then update Guid to have the correct value forthat GUID.This function is only available when the major and minor versions in theEfiShellProtocol are greater than or equal to 2 and 1, respectively.@param[in] GuidName A pointer to the localized name for the GUID being queried.@param[out] Guid A pointer to the GUID structure to be filled in.@retval EFI_SUCCESS The operation was successful.@retval EFI_INVALID_PARAMETER Guid was NULL.@retval EFI_INVALID_PARAMETER GuidName was NULL.@retval EFI_NOT_FOUND GuidName is not a known GUID Name.
**/
EFI_STATUS
EFIAPI
EfiShellGetGuidFromName(IN CONST CHAR16 *GuidName,OUT EFI_GUID *Guid)
{EFI_GUID *NewGuid;EFI_STATUS Status;if (Guid == NULL || GuidName == NULL) {return (EFI_INVALID_PARAMETER);}Status = GetGuidFromStringName(GuidName, NULL, &NewGuid);if (!EFI_ERROR(Status)) {CopyGuid(Guid, NewGuid);}return (Status);
}/**Get the human readable name for a GUID from the value.If Guid is assigned a name, then update *GuidName to point to the name. The calleeshould not modify the value.This function is only available when the major and minor versions in theEfiShellProtocol are greater than or equal to 2 and 1, respectively.@param[in] Guid A pointer to the GUID being queried.@param[out] GuidName A pointer to a pointer the localized to name for the GUID being requested@retval EFI_SUCCESS The operation was successful.@retval EFI_INVALID_PARAMETER Guid was NULL.@retval EFI_INVALID_PARAMETER GuidName was NULL.@retval EFI_NOT_FOUND Guid is not assigned a name.
**/
EFI_STATUS
EFIAPI
EfiShellGetGuidName(IN CONST EFI_GUID *Guid,OUT CONST CHAR16 **GuidName)
{CHAR16 *Name;if (Guid == NULL || GuidName == NULL) {return (EFI_INVALID_PARAMETER);}Name = GetStringNameFromGuid(Guid, NULL);if (Name == NULL || StrLen(Name) == 0) {SHELL_FREE_NON_NULL(Name);return (EFI_NOT_FOUND);}*GuidName = AddBufferToFreeList(Name);return (EFI_SUCCESS);
}/**Updates a file name to be preceeded by the mapped drive name@param[in] BasePath the Mapped drive name to prepend@param[in, out] Path pointer to pointer to the file name to update.@retval EFI_SUCCESS@retval EFI_OUT_OF_RESOURCES
**/
EFI_STATUS
UpdateFileName(IN CONST CHAR16 *BasePath,IN OUT CHAR16 **Path)
{CHAR16 *Path2;UINTN Path2Size;Path2Size = 0;Path2 = NULL;ASSERT(Path != NULL);ASSERT(*Path != NULL);ASSERT(BasePath != NULL);//// convert a local path to an absolute path//if (StrStr(*Path, L":") == NULL) {ASSERT((Path2 == NULL && Path2Size == 0) || (Path2 != NULL));StrnCatGrow(&Path2, &Path2Size, BasePath, 0);if (Path2 == NULL) {return (EFI_OUT_OF_RESOURCES);}ASSERT((Path2 == NULL && Path2Size == 0) || (Path2 != NULL));StrnCatGrow(&Path2, &Path2Size, (*Path)[0] == L'\\'?(*Path) + 1 :*Path, 0);if (Path2 == NULL) {return (EFI_OUT_OF_RESOURCES);}}FreePool(*Path);(*Path) = Path2;return (EFI_SUCCESS);
}/**If FileHandle is a directory then the function reads from FileHandle and reads ineach of the FileInfo structures. If one of them matches the Pattern's first"level" then it opens that handle and calls itself on that handle.If FileHandle is a file and matches all of the remaining Pattern (which would beon its last node), then add a EFI_SHELL_FILE_INFO object for this file to fileList.Upon a EFI_SUCCESS return fromt he function any the caller is responsible to callFreeFileList with FileList.@param[in] FilePattern The FilePattern to check against.@param[in] UnicodeCollation The pointer to EFI_UNICODE_COLLATION_PROTOCOL structure@param[in] FileHandle The FileHandle to start with@param[in, out] FileList pointer to pointer to list of found files.@param[in] ParentNode The node for the parent. Same file as identified by HANDLE.@param[in] MapName The file system name this file is on.@retval EFI_SUCCESS all files were found and the FileList contains a list.@retval EFI_NOT_FOUND no files were found@retval EFI_OUT_OF_RESOURCES a memory allocation failed
**/
EFI_STATUS
ShellSearchHandle(IN CONST CHAR16 *FilePattern,IN EFI_UNICODE_COLLATION_PROTOCOL *UnicodeCollation,IN SHELL_FILE_HANDLE FileHandle,IN OUT EFI_SHELL_FILE_INFO **FileList,IN CONST EFI_SHELL_FILE_INFO *ParentNode OPTIONAL,IN CONST CHAR16 *MapName)
{EFI_STATUS Status;CONST CHAR16 *NextFilePatternStart;CHAR16 *CurrentFilePattern;EFI_SHELL_FILE_INFO *ShellInfo;EFI_SHELL_FILE_INFO *ShellInfoNode;EFI_SHELL_FILE_INFO *NewShellNode;EFI_FILE_INFO *FileInfo;BOOLEAN Directory;CHAR16 *NewFullName;UINTN Size;if ( FilePattern == NULL|| UnicodeCollation == NULL|| FileList == NULL){return (EFI_INVALID_PARAMETER);}ShellInfo = NULL;CurrentFilePattern = NULL;if (*FilePattern == L'\\') {FilePattern++;}for( NextFilePatternStart = FilePattern; *NextFilePatternStart != CHAR_NULL && *NextFilePatternStart != L'\\'; NextFilePatternStart++);CurrentFilePattern = AllocateZeroPool((NextFilePatternStart-FilePattern+1)*sizeof(CHAR16));if (CurrentFilePattern == NULL) {return EFI_OUT_OF_RESOURCES;}StrnCpyS(CurrentFilePattern, NextFilePatternStart-FilePattern+1, FilePattern, NextFilePatternStart-FilePattern);if (CurrentFilePattern[0] == CHAR_NULL&&NextFilePatternStart[0] == CHAR_NULL){//// we want the parent or root node (if no parent)//if (ParentNode == NULL) {//// We want the root node. create the node.//FileInfo = FileHandleGetInfo(FileHandle);NewShellNode = CreateAndPopulateShellFileInfo(MapName,EFI_SUCCESS,L"\\",FileHandle,FileInfo);SHELL_FREE_NON_NULL(FileInfo);} else {//// Add the current parameter FileHandle to the list, then end...//NewShellNode = InternalDuplicateShellFileInfo((EFI_SHELL_FILE_INFO*)ParentNode, TRUE);}if (NewShellNode == NULL) {Status = EFI_OUT_OF_RESOURCES;} else {NewShellNode->Handle = NULL;if (*FileList == NULL) {*FileList = AllocateZeroPool(sizeof(EFI_SHELL_FILE_INFO));InitializeListHead(&((*FileList)->Link));}//// Add to the returning to use list//InsertTailList(&(*FileList)->Link, &NewShellNode->Link);Status = EFI_SUCCESS;}} else {Status = EfiShellFindFilesInDir(FileHandle, &ShellInfo);if (!EFI_ERROR(Status)){if (StrStr(NextFilePatternStart, L"\\") != NULL){Directory = TRUE;} else {Directory = FALSE;}for ( ShellInfoNode = (EFI_SHELL_FILE_INFO*)GetFirstNode(&ShellInfo->Link); !IsNull (&ShellInfo->Link, &ShellInfoNode->Link); ShellInfoNode = (EFI_SHELL_FILE_INFO*)GetNextNode(&ShellInfo->Link, &ShellInfoNode->Link)){if (UnicodeCollation->MetaiMatch(UnicodeCollation, (CHAR16*)ShellInfoNode->FileName, CurrentFilePattern)){if (ShellInfoNode->FullName != NULL && StrStr(ShellInfoNode->FullName, L":") == NULL) {Size = StrSize (ShellInfoNode->FullName) + StrSize (MapName);NewFullName = AllocateZeroPool(Size);if (NewFullName == NULL) {Status = EFI_OUT_OF_RESOURCES;} else {StrCpyS(NewFullName, Size / sizeof(CHAR16), MapName);StrCatS(NewFullName, Size / sizeof(CHAR16), ShellInfoNode->FullName);FreePool ((VOID *) ShellInfoNode->FullName);ShellInfoNode->FullName = NewFullName;}}if (Directory && !EFI_ERROR(Status) && ShellInfoNode->FullName != NULL && ShellInfoNode->FileName != NULL){//// should be a directory////// don't open the . and .. directories//if ( (StrCmp(ShellInfoNode->FileName, L".") != 0)&& (StrCmp(ShellInfoNode->FileName, L"..") != 0)){//////if (EFI_ERROR(Status)) {break;}//// Open the directory since we need that handle in the next recursion.//ShellInfoNode->Status = EfiShellOpenFileByName (ShellInfoNode->FullName, &ShellInfoNode->Handle, EFI_FILE_MODE_READ);//// recurse with the next part of the pattern//Status = ShellSearchHandle(NextFilePatternStart, UnicodeCollation, ShellInfoNode->Handle, FileList, ShellInfoNode, MapName);EfiShellClose(ShellInfoNode->Handle);ShellInfoNode->Handle = NULL;}} else if (!EFI_ERROR(Status)) {//// should be a file////// copy the information we need into a new Node//NewShellNode = InternalDuplicateShellFileInfo(ShellInfoNode, FALSE);if (NewShellNode == NULL) {Status = EFI_OUT_OF_RESOURCES;}if (*FileList == NULL) {*FileList = AllocateZeroPool(sizeof(EFI_SHELL_FILE_INFO));InitializeListHead(&((*FileList)->Link));}//// Add to the returning to use list//InsertTailList(&(*FileList)->Link, &NewShellNode->Link);}}if (EFI_ERROR(Status)) {break;}}if (EFI_ERROR(Status)) {EfiShellFreeFileList(&ShellInfo);} else {Status = EfiShellFreeFileList(&ShellInfo);}}}if (*FileList == NULL || (*FileList != NULL && IsListEmpty(&(*FileList)->Link))) {Status = EFI_NOT_FOUND;}FreePool(CurrentFilePattern);return (Status);
}/**Find files that match a specified pattern.This function searches for all files and directories that match the specifiedFilePattern. The FilePattern can contain wild-card characters. The resulting fileinformation is placed in the file list FileList.Wildcards are processedaccording to the rules specified in UEFI Shell 2.0 spec section 3.7.1.The files in the file list are not opened. The OpenMode field is set to 0 and the FileInfofield is set to NULL.if *FileList is not NULL then it must be a pre-existing and properly initialized list.@param FilePattern Points to a NULL-terminated shell file path, including wildcards.@param FileList On return, points to the start of a file list containing the namesof all matching files or else points to NULL if no matching fileswere found. only on a EFI_SUCCESS return will; this be non-NULL.@retval EFI_SUCCESS Files found. FileList is a valid list.@retval EFI_NOT_FOUND No files found.@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
EfiShellFindFiles(IN CONST CHAR16 *FilePattern,OUT EFI_SHELL_FILE_INFO **FileList)
{EFI_STATUS Status;CHAR16 *PatternCopy;CHAR16 *PatternCurrentLocation;EFI_DEVICE_PATH_PROTOCOL *RootDevicePath;SHELL_FILE_HANDLE RootFileHandle;CHAR16 *MapName;UINTN Count;if ( FilePattern == NULL|| FileList == NULL|| StrStr(FilePattern, L":") == NULL){return (EFI_INVALID_PARAMETER);}Status = EFI_SUCCESS;RootDevicePath = NULL;RootFileHandle = NULL;MapName = NULL;PatternCopy = AllocateCopyPool(StrSize(FilePattern), FilePattern);if (PatternCopy == NULL) {return (EFI_OUT_OF_RESOURCES);}PatternCopy = PathCleanUpDirectories(PatternCopy);Count = StrStr(PatternCopy, L":") - PatternCopy + 1;ASSERT (Count <= StrLen (PatternCopy));ASSERT(MapName == NULL);MapName = StrnCatGrow(&MapName, NULL, PatternCopy, Count);if (MapName == NULL) {Status = EFI_OUT_OF_RESOURCES;} else {RootDevicePath = EfiShellGetDevicePathFromFilePath(PatternCopy);if (RootDevicePath == NULL) {Status = EFI_INVALID_PARAMETER;} else {Status = EfiShellOpenRoot(RootDevicePath, &RootFileHandle);if (!EFI_ERROR(Status)) {for ( PatternCurrentLocation = PatternCopy; *PatternCurrentLocation != ':'; PatternCurrentLocation++);PatternCurrentLocation++;Status = ShellSearchHandle(PatternCurrentLocation, gUnicodeCollation, RootFileHandle, FileList, NULL, MapName);EfiShellClose(RootFileHandle);}FreePool(RootDevicePath);}}SHELL_FREE_NON_NULL(PatternCopy);SHELL_FREE_NON_NULL(MapName);return(Status);
}/**Opens the files that match the path specified.This function opens all of the files specified by Path. Wildcards are processedaccording to the rules specified in UEFI Shell 2.0 spec section 3.7.1. Eachmatching file has an EFI_SHELL_FILE_INFO structure created in a linked list.@param Path A pointer to the path string.@param OpenMode Specifies the mode used to open each file, EFI_FILE_MODE_READ orEFI_FILE_MODE_WRITE.@param FileList Points to the start of a list of files opened.@retval EFI_SUCCESS Create the file list successfully.@return Others Can't create the file list.
**/
EFI_STATUS
EFIAPI
EfiShellOpenFileList(IN CHAR16 *Path,IN UINT64 OpenMode,IN OUT EFI_SHELL_FILE_INFO **FileList)
{EFI_STATUS Status;EFI_SHELL_FILE_INFO *ShellFileListItem;CHAR16 *Path2;UINTN Path2Size;CONST CHAR16 *CurDir;BOOLEAN Found;PathCleanUpDirectories(Path);Path2Size = 0;Path2 = NULL;if (FileList == NULL || *FileList == NULL) {return (EFI_INVALID_PARAMETER);}if (*Path == L'.' && *(Path+1) == L'\\') {Path+=2;}//// convert a local path to an absolute path//if (StrStr(Path, L":") == NULL) {CurDir = EfiShellGetCurDir(NULL);ASSERT((Path2 == NULL && Path2Size == 0) || (Path2 != NULL));StrnCatGrow(&Path2, &Path2Size, CurDir, 0);StrnCatGrow(&Path2, &Path2Size, L"\\", 0);if (*Path == L'\\') {Path++;while (PathRemoveLastItem(Path2)) ;}ASSERT((Path2 == NULL && Path2Size == 0) || (Path2 != NULL));StrnCatGrow(&Path2, &Path2Size, Path, 0);} else {ASSERT(Path2 == NULL);StrnCatGrow(&Path2, NULL, Path, 0);}PathCleanUpDirectories (Path2);//// do the search//Status = EfiShellFindFiles(Path2, FileList);FreePool(Path2);if (EFI_ERROR(Status)) {return (Status);}Found = FALSE;//// We had no errors so open all the files (that are not already opened...)//for ( ShellFileListItem = (EFI_SHELL_FILE_INFO*)GetFirstNode(&(*FileList)->Link); !IsNull(&(*FileList)->Link, &ShellFileListItem->Link); ShellFileListItem = (EFI_SHELL_FILE_INFO*)GetNextNode(&(*FileList)->Link, &ShellFileListItem->Link)){if (ShellFileListItem->Status == 0 && ShellFileListItem->Handle == NULL) {ShellFileListItem->Status = EfiShellOpenFileByName (ShellFileListItem->FullName, &ShellFileListItem->Handle, OpenMode);Found = TRUE;}}if (!Found) {return (EFI_NOT_FOUND);}return(EFI_SUCCESS);
}/**Gets the environment variable and Attributes, or list of environment variables. Can beused instead of GetEnv().This function returns the current value of the specified environment variable andthe Attributes. If no variable name was specified, then all of the knownvariables will be returned.@param[in] Name A pointer to the environment variable name. If Name is NULL,then the function will return all of the defined shellenvironment variables. In the case where multiple environmentvariables are being returned, each variable will be terminatedby a NULL, and the list will be terminated by a double NULL.@param[out] Attributes If not NULL, a pointer to the returned attributes bitmask forthe environment variable. In the case where Name is NULL, andmultiple environment variables are being returned, Attributesis undefined.@retval NULL The environment variable doesn't exist.@return A non-NULL value points to the variable's value. The returnedpointer does not need to be freed by the caller.
**/
CONST CHAR16 *
EFIAPI
EfiShellGetEnvEx(IN CONST CHAR16 *Name,OUT UINT32 *Attributes OPTIONAL)
{EFI_STATUS Status;VOID *Buffer;UINTN Size;ENV_VAR_LIST *Node;CHAR16 *CurrentWriteLocation;Size = 0;Buffer = NULL;if (Name == NULL) {//// Build the semi-colon delimited list. (2 passes)//for ( Node = (ENV_VAR_LIST*)GetFirstNode(&gShellEnvVarList.Link); !IsNull(&gShellEnvVarList.Link, &Node->Link); Node = (ENV_VAR_LIST*)GetNextNode(&gShellEnvVarList.Link, &Node->Link)){ASSERT(Node->Key != NULL);Size += StrSize(Node->Key);}Size += 2*sizeof(CHAR16);Buffer = AllocateZeroPool(Size);if (Buffer == NULL) {return (NULL);}CurrentWriteLocation = (CHAR16*)Buffer;for ( Node = (ENV_VAR_LIST*)GetFirstNode(&gShellEnvVarList.Link); !IsNull(&gShellEnvVarList.Link, &Node->Link); Node = (ENV_VAR_LIST*)GetNextNode(&gShellEnvVarList.Link, &Node->Link)){ASSERT(Node->Key != NULL);StrCpyS( CurrentWriteLocation, (Size)/sizeof(CHAR16) - (CurrentWriteLocation - ((CHAR16*)Buffer)), Node->Key);CurrentWriteLocation += StrLen(CurrentWriteLocation) + 1;}} else {//// We are doing a specific environment variable//Status = ShellFindEnvVarInList(Name, (CHAR16**)&Buffer, &Size, Attributes);if (EFI_ERROR(Status)){//// get the size we need for this EnvVariable//Status = SHELL_GET_ENVIRONMENT_VARIABLE_AND_ATTRIBUTES(Name, Attributes, &Size, Buffer);if (Status == EFI_BUFFER_TOO_SMALL) {//// Allocate the space and recall the get function//Buffer = AllocateZeroPool(Size);Status = SHELL_GET_ENVIRONMENT_VARIABLE_AND_ATTRIBUTES(Name, Attributes, &Size, Buffer);}//// we didnt get it (might not exist)// free the memory if we allocated any and return NULL//if (EFI_ERROR(Status)) {if (Buffer != NULL) {FreePool(Buffer);}return (NULL);} else {//// If we did not find the environment variable in the gShellEnvVarList// but get it from UEFI variable storage successfully then we need update// the gShellEnvVarList.//ShellFreeEnvVarList ();Status = ShellInitEnvVarList ();ASSERT (Status == EFI_SUCCESS);}}}//// return the buffer//return (AddBufferToFreeList(Buffer));
}/**Gets either a single or list of environment variables.If name is not NULL then this function returns the current value of the specifiedenvironment variable.If Name is NULL, then a list of all environment variable names is returned. Each is aNULL terminated string with a double NULL terminating the list.@param Name A pointer to the environment variable name. IfName is NULL, then the function will return allof the defined shell environment variables. Inthe case where multiple environment variables arebeing returned, each variable will be terminated bya NULL, and the list will be terminated by a doubleNULL.@retval !=NULL A pointer to the returned string.The returned pointer does not need to be freed by the caller.@retval NULL The environment variable doesn't exist or there areno environment variables.
**/
CONST CHAR16 *
EFIAPI
EfiShellGetEnv(IN CONST CHAR16 *Name)
{return (EfiShellGetEnvEx(Name, NULL));
}/**Internal variable setting function. Allows for setting of the read only variables.@param Name Points to the NULL-terminated environment variable name.@param Value Points to the NULL-terminated environment variable value. If the value is anempty string then the environment variable is deleted.@param Volatile Indicates whether the variable is non-volatile (FALSE) or volatile (TRUE).@retval EFI_SUCCESS The environment variable was successfully updated.
**/
EFI_STATUS
InternalEfiShellSetEnv(IN CONST CHAR16 *Name,IN CONST CHAR16 *Value,IN BOOLEAN Volatile)
{EFI_STATUS Status;if (Value == NULL || StrLen(Value) == 0) {Status = SHELL_DELETE_ENVIRONMENT_VARIABLE(Name);if (!EFI_ERROR(Status)) {ShellRemvoeEnvVarFromList(Name);}} else {SHELL_DELETE_ENVIRONMENT_VARIABLE(Name);Status = ShellAddEnvVarToList(Name, Value, StrSize(Value),EFI_VARIABLE_BOOTSERVICE_ACCESS | (Volatile ? 0 : EFI_VARIABLE_NON_VOLATILE));if (!EFI_ERROR (Status)) {Status = Volatile? SHELL_SET_ENVIRONMENT_VARIABLE_V (Name, StrSize (Value) - sizeof (CHAR16), Value): SHELL_SET_ENVIRONMENT_VARIABLE_NV (Name, StrSize (Value) - sizeof (CHAR16), Value);if (EFI_ERROR (Status)) {ShellRemvoeEnvVarFromList(Name);}}}return Status;
}/**Sets the environment variable.This function changes the current value of the specified environment variable. If theenvironment variable exists and the Value is an empty string, then the environmentvariable is deleted. If the environment variable exists and the Value is not an emptystring, then the value of the environment variable is changed. If the environmentvariable does not exist and the Value is an empty string, there is no action. If theenvironment variable does not exist and the Value is a non-empty string, then theenvironment variable is created and assigned the specified value.For a description of volatile and non-volatile environment variables, see UEFI Shell2.0 specification section 3.6.1.@param Name Points to the NULL-terminated environment variable name.@param Value Points to the NULL-terminated environment variable value. If the value is anempty string then the environment variable is deleted.@param Volatile Indicates whether the variable is non-volatile (FALSE) or volatile (TRUE).@retval EFI_SUCCESS The environment variable was successfully updated.
**/
EFI_STATUS
EFIAPI
EfiShellSetEnv(IN CONST CHAR16 *Name,IN CONST CHAR16 *Value,IN BOOLEAN Volatile)
{if (Name == NULL || *Name == CHAR_NULL) {return (EFI_INVALID_PARAMETER);}//// Make sure we dont 'set' a predefined read only variable//if (gUnicodeCollation->StriColl(gUnicodeCollation,(CHAR16*)Name,L"cwd") == 0||gUnicodeCollation->StriColl(gUnicodeCollation,(CHAR16*)Name,L"Lasterror") == 0||gUnicodeCollation->StriColl(gUnicodeCollation,(CHAR16*)Name,L"profiles") == 0||gUnicodeCollation->StriColl(gUnicodeCollation,(CHAR16*)Name,L"uefishellsupport") == 0||gUnicodeCollation->StriColl(gUnicodeCollation,(CHAR16*)Name,L"uefishellversion") == 0||gUnicodeCollation->StriColl(gUnicodeCollation,(CHAR16*)Name,L"uefiversion") == 0||(!ShellInfoObject.ShellInitSettings.BitUnion.Bits.NoNest &&gUnicodeCollation->StriColl(gUnicodeCollation,(CHAR16*)Name,(CHAR16*)mNoNestingEnvVarName) == 0)){return (EFI_INVALID_PARAMETER);}return (InternalEfiShellSetEnv(Name, Value, Volatile));
}/**Returns the current directory on the specified device.If FileSystemMapping is NULL, it returns the current working directory. If theFileSystemMapping is not NULL, it returns the current directory associated with theFileSystemMapping. In both cases, the returned name includes the file systemmapping (i.e. fs0:\current-dir).Note that the current directory string should exclude the tailing backslash character.@param FileSystemMapping A pointer to the file system mapping. If NULL,then the current working directory is returned.@retval !=NULL The current directory.@retval NULL Current directory does not exist.
**/
CONST CHAR16 *
EFIAPI
EfiShellGetCurDir(IN CONST CHAR16 *FileSystemMapping OPTIONAL)
{CHAR16 *PathToReturn;UINTN Size;SHELL_MAP_LIST *MapListItem;if (!IsListEmpty(&gShellMapList.Link)) {//// if parameter is NULL, use current//if (FileSystemMapping == NULL) {return (EfiShellGetEnv(L"cwd"));} else {Size = 0;PathToReturn = NULL;MapListItem = ShellCommandFindMapItem(FileSystemMapping);if (MapListItem != NULL) {ASSERT((PathToReturn == NULL && Size == 0) || (PathToReturn != NULL));PathToReturn = StrnCatGrow(&PathToReturn, &Size, MapListItem->MapName, 0);PathToReturn = StrnCatGrow(&PathToReturn, &Size, MapListItem->CurrentDirectoryPath, 0);}}return (AddBufferToFreeList(PathToReturn));} else {return (NULL);}
}/**Changes the current directory on the specified device.If the FileSystem is NULL, and the directory Dir does not contain a file system'smapped name, this function changes the current working directory.If the FileSystem is NULL and the directory Dir contains a mapped name, then thecurrent file system and the current directory on that file system are changed.If FileSystem is NULL, and Dir is not NULL, then this changes the current working filesystem.If FileSystem is not NULL and Dir is not NULL, then this function changes the currentdirectory on the specified file system.If the current working directory or the current working file system is changed then the%cwd% environment variable will be updatedNote that the current directory string should exclude the tailing backslash character.@param FileSystem A pointer to the file system's mapped name. If NULL, then the current workingdirectory is changed.@param Dir Points to the NULL-terminated directory on the device specified by FileSystem.@retval EFI_SUCCESS The operation was sucessful@retval EFI_NOT_FOUND The file system could not be found
**/
EFI_STATUS
EFIAPI
EfiShellSetCurDir(IN CONST CHAR16 *FileSystem OPTIONAL,IN CONST CHAR16 *Dir)
{CHAR16 *MapName;SHELL_MAP_LIST *MapListItem;UINTN Size;EFI_STATUS Status;CHAR16 *TempString;CHAR16 *DirectoryName;UINTN TempLen;Size = 0;MapName = NULL;MapListItem = NULL;TempString = NULL;DirectoryName = NULL;if ((FileSystem == NULL && Dir == NULL) || Dir == NULL) {return (EFI_INVALID_PARAMETER);}if (IsListEmpty(&gShellMapList.Link)){return (EFI_NOT_FOUND);}DirectoryName = StrnCatGrow(&DirectoryName, NULL, Dir, 0);ASSERT(DirectoryName != NULL);PathCleanUpDirectories(DirectoryName);if (FileSystem == NULL) {//// determine the file system mapping to use//if (StrStr(DirectoryName, L":") != NULL) {ASSERT(MapName == NULL);MapName = StrnCatGrow(&MapName, NULL, DirectoryName, (StrStr(DirectoryName, L":")-DirectoryName+1));}//// find the file system mapping's entry in the list// or use current//if (MapName != NULL) {MapListItem = ShellCommandFindMapItem(MapName);//// make that the current file system mapping//if (MapListItem != NULL) {gShellCurDir = MapListItem;}} else {MapListItem = gShellCurDir;}if (MapListItem == NULL) {FreePool (DirectoryName);SHELL_FREE_NON_NULL(MapName);return (EFI_NOT_FOUND);}//// now update the MapListItem's current directory//if (MapListItem->CurrentDirectoryPath != NULL && DirectoryName[StrLen(DirectoryName) - 1] != L':') {FreePool(MapListItem->CurrentDirectoryPath);MapListItem->CurrentDirectoryPath = NULL;}if (MapName != NULL) {TempLen = StrLen(MapName);if (TempLen != StrLen(DirectoryName)) {ASSERT((MapListItem->CurrentDirectoryPath == NULL && Size == 0) || (MapListItem->CurrentDirectoryPath != NULL));MapListItem->CurrentDirectoryPath = StrnCatGrow(&MapListItem->CurrentDirectoryPath, &Size, DirectoryName+StrLen(MapName), 0);}FreePool (MapName);} else {ASSERT((MapListItem->CurrentDirectoryPath == NULL && Size == 0) || (MapListItem->CurrentDirectoryPath != NULL));MapListItem->CurrentDirectoryPath = StrnCatGrow(&MapListItem->CurrentDirectoryPath, &Size, DirectoryName, 0);}if ((MapListItem->CurrentDirectoryPath != NULL && MapListItem->CurrentDirectoryPath[StrLen(MapListItem->CurrentDirectoryPath)-1] == L'\\') || (MapListItem->CurrentDirectoryPath == NULL)) {ASSERT((MapListItem->CurrentDirectoryPath == NULL && Size == 0) || (MapListItem->CurrentDirectoryPath != NULL));if (MapListItem->CurrentDirectoryPath != NULL) {MapListItem->CurrentDirectoryPath[StrLen(MapListItem->CurrentDirectoryPath)-1] = CHAR_NULL;}}} else {//// cant have a mapping in the directory...//if (StrStr(DirectoryName, L":") != NULL) {FreePool (DirectoryName);return (EFI_INVALID_PARAMETER);}//// FileSystem != NULL//MapListItem = ShellCommandFindMapItem(FileSystem);if (MapListItem == NULL) {FreePool (DirectoryName);return (EFI_INVALID_PARAMETER);}
// gShellCurDir = MapListItem;if (DirectoryName != NULL) {//// change current dir on that file system//if (MapListItem->CurrentDirectoryPath != NULL) {FreePool(MapListItem->CurrentDirectoryPath);DEBUG_CODE(MapListItem->CurrentDirectoryPath = NULL;);}
// ASSERT((MapListItem->CurrentDirectoryPath == NULL && Size == 0) || (MapListItem->CurrentDirectoryPath != NULL));
// MapListItem->CurrentDirectoryPath = StrnCatGrow(&MapListItem->CurrentDirectoryPath, &Size, FileSystem, 0);ASSERT((MapListItem->CurrentDirectoryPath == NULL && Size == 0) || (MapListItem->CurrentDirectoryPath != NULL));MapListItem->CurrentDirectoryPath = StrnCatGrow(&MapListItem->CurrentDirectoryPath, &Size, L"\\", 0);ASSERT((MapListItem->CurrentDirectoryPath == NULL && Size == 0) || (MapListItem->CurrentDirectoryPath != NULL));MapListItem->CurrentDirectoryPath = StrnCatGrow(&MapListItem->CurrentDirectoryPath, &Size, DirectoryName, 0);if (MapListItem->CurrentDirectoryPath != NULL && MapListItem->CurrentDirectoryPath[StrLen(MapListItem->CurrentDirectoryPath)-1] == L'\\') {ASSERT((MapListItem->CurrentDirectoryPath == NULL && Size == 0) || (MapListItem->CurrentDirectoryPath != NULL));MapListItem->CurrentDirectoryPath[StrLen(MapListItem->CurrentDirectoryPath)-1] = CHAR_NULL;}}}FreePool (DirectoryName);//// if updated the current directory then update the environment variable//if (MapListItem == gShellCurDir) {Size = 0;ASSERT((TempString == NULL && Size == 0) || (TempString != NULL));StrnCatGrow(&TempString, &Size, MapListItem->MapName, 0);ASSERT((TempString == NULL && Size == 0) || (TempString != NULL));StrnCatGrow(&TempString, &Size, MapListItem->CurrentDirectoryPath, 0);Status = InternalEfiShellSetEnv(L"cwd", TempString, TRUE);FreePool(TempString);return (Status);}return(EFI_SUCCESS);
}/**Return help information about a specific command.This function returns the help information for the specified command. The help textcan be internal to the shell or can be from a UEFI Shell manual page.If Sections is specified, then each section name listed will be compared in a casesensitivemanner, to the section names described in Appendix B. If the section exists,it will be appended to the returned help text. If the section does not exist, noinformation will be returned. If Sections is NULL, then all help text informationavailable will be returned.@param Command Points to the NULL-terminated UEFI Shell command name.@param Sections Points to the NULL-terminated comma-delimitedsection names to return. If NULL, then allsections will be returned.@param HelpText On return, points to a callee-allocated buffercontaining all specified help text.@retval EFI_SUCCESS The help text was returned.@retval EFI_OUT_OF_RESOURCES The necessary buffer could not be allocated to hold thereturned help text.@retval EFI_INVALID_PARAMETER HelpText is NULL@retval EFI_NOT_FOUND There is no help text available for Command.
**/
EFI_STATUS
EFIAPI
EfiShellGetHelpText(IN CONST CHAR16 *Command,IN CONST CHAR16 *Sections OPTIONAL,OUT CHAR16 **HelpText)
{CONST CHAR16 *ManFileName;CHAR16 *FixCommand;EFI_STATUS Status;ASSERT(HelpText != NULL);FixCommand = NULL;ManFileName = ShellCommandGetManFileNameHandler(Command);if (ManFileName != NULL) {return (ProcessManFile(ManFileName, Command, Sections, NULL, HelpText));} else {if ((StrLen(Command)> 4)&& (Command[StrLen(Command)-1] == L'i' || Command[StrLen(Command)-1] == L'I')&& (Command[StrLen(Command)-2] == L'f' || Command[StrLen(Command)-2] == L'F')&& (Command[StrLen(Command)-3] == L'e' || Command[StrLen(Command)-3] == L'E')&& (Command[StrLen(Command)-4] == L'.')) {FixCommand = AllocateZeroPool(StrSize(Command) - 4 * sizeof (CHAR16));if (FixCommand == NULL) {return EFI_OUT_OF_RESOURCES;}StrnCpyS( FixCommand, (StrSize(Command) - 4 * sizeof (CHAR16))/sizeof(CHAR16), Command, StrLen(Command)-4);Status = ProcessManFile(FixCommand, FixCommand, Sections, NULL, HelpText);FreePool(FixCommand);return Status;} else {return (ProcessManFile(Command, Command, Sections, NULL, HelpText));}}
}/**Gets the enable status of the page break output mode.User can use this function to determine current page break mode.@retval TRUE The page break output mode is enabled.@retval FALSE The page break output mode is disabled.
**/
BOOLEAN
EFIAPI
EfiShellGetPageBreak(VOID)
{return(ShellInfoObject.PageBreakEnabled);
}/**Judges whether the active shell is the root shell.This function makes the user to know that whether the active Shell is the root shell.@retval TRUE The active Shell is the root Shell.@retval FALSE The active Shell is NOT the root Shell.
**/
BOOLEAN
EFIAPI
EfiShellIsRootShell(VOID)
{return(ShellInfoObject.RootShellInstance);
}/**function to return a semi-colon delimeted list of all alias' in the current shellup to caller to free the memory.@retval NULL No alias' were found@retval NULL An error ocurred getting alias'@return !NULL a list of all alias'
**/
CHAR16 *
InternalEfiShellGetListAlias()
{EFI_STATUS Status;EFI_GUID Guid;CHAR16 *VariableName;UINTN NameSize;UINTN NameBufferSize;CHAR16 *RetVal;UINTN RetSize;NameBufferSize = INIT_NAME_BUFFER_SIZE;VariableName = AllocateZeroPool(NameBufferSize);RetSize = 0;RetVal = NULL;if (VariableName == NULL) {return (NULL);}VariableName[0] = CHAR_NULL;while (TRUE) {NameSize = NameBufferSize;Status = gRT->GetNextVariableName(&NameSize, VariableName, &Guid);if (Status == EFI_NOT_FOUND){break;} else if (Status == EFI_BUFFER_TOO_SMALL) {NameBufferSize = NameSize > NameBufferSize * 2 ? NameSize : NameBufferSize * 2;SHELL_FREE_NON_NULL(VariableName);VariableName = AllocateZeroPool(NameBufferSize);if (VariableName == NULL) {Status = EFI_OUT_OF_RESOURCES;SHELL_FREE_NON_NULL(RetVal);RetVal = NULL;break;}NameSize = NameBufferSize;Status = gRT->GetNextVariableName(&NameSize, VariableName, &Guid);}if (EFI_ERROR (Status)) {SHELL_FREE_NON_NULL(RetVal);RetVal = NULL;break;}if (CompareGuid(&Guid, &gShellAliasGuid)){ASSERT((RetVal == NULL && RetSize == 0) || (RetVal != NULL));RetVal = StrnCatGrow(&RetVal, &RetSize, VariableName, 0);RetVal = StrnCatGrow(&RetVal, &RetSize, L";", 0);} // compare guid} // whileSHELL_FREE_NON_NULL(VariableName);return (RetVal);
}/**Convert a null-terminated unicode string, in-place, to all lowercase.Then return it.@param Str The null-terminated string to be converted to all lowercase.@return The null-terminated string converted into all lowercase.
**/
CHAR16 *
ToLower (CHAR16 *Str)
{UINTN Index;for (Index = 0; Str[Index] != L'\0'; Index++) {if (Str[Index] >= L'A' && Str[Index] <= L'Z') {Str[Index] -= (CHAR16)(L'A' - L'a');}}return Str;
}/**This function returns the command associated with a alias or a list of allalias'.@param[in] Alias Points to the NULL-terminated shell alias.If this parameter is NULL, then allaliases will be returned in ReturnedData.@param[out] Volatile upon return of a single command if TRUE indicatesthis is stored in a volatile fashion. FALSE otherwise.@return If Alias is not NULL, it will return a pointer tothe NULL-terminated command for that alias.If Alias is NULL, ReturnedData points to a ';'delimited list of alias (e.g.ReturnedData = "dir;del;copy;mfp") that is NULL-terminated.@retval NULL an error ocurred@retval NULL Alias was not a valid Alias
**/
CONST CHAR16 *
EFIAPI
EfiShellGetAlias(IN CONST CHAR16 *Alias,OUT BOOLEAN *Volatile OPTIONAL)
{CHAR16 *RetVal;UINTN RetSize;UINT32 Attribs;EFI_STATUS Status;CHAR16 *AliasLower;CHAR16 *AliasVal;// Convert to lowercase to make aliases case-insensitiveif (Alias != NULL) {AliasLower = AllocateCopyPool (StrSize (Alias), Alias);if (AliasLower == NULL) {return NULL;}ToLower (AliasLower);if (Volatile == NULL) {GetVariable2 (AliasLower, &gShellAliasGuid, (VOID **)&AliasVal, NULL);FreePool(AliasLower);return (AddBufferToFreeList(AliasVal));}RetSize = 0;RetVal = NULL;Status = gRT->GetVariable(AliasLower, &gShellAliasGuid, &Attribs, &RetSize, RetVal);if (Status == EFI_BUFFER_TOO_SMALL) {RetVal = AllocateZeroPool(RetSize);Status = gRT->GetVariable(AliasLower, &gShellAliasGuid, &Attribs, &RetSize, RetVal);}if (EFI_ERROR(Status)) {if (RetVal != NULL) {FreePool(RetVal);}FreePool(AliasLower);return (NULL);}if ((EFI_VARIABLE_NON_VOLATILE & Attribs) == EFI_VARIABLE_NON_VOLATILE) {*Volatile = FALSE;} else {*Volatile = TRUE;}FreePool (AliasLower);return (AddBufferToFreeList(RetVal));}return (AddBufferToFreeList(InternalEfiShellGetListAlias()));
}/**Changes a shell command alias.This function creates an alias for a shell command or if Alias is NULL it will delete an existing alias.this function does not check for built in alias'.@param[in] Command Points to the NULL-terminated shell command or existing alias.@param[in] Alias Points to the NULL-terminated alias for the shell command. If this is NULL, andCommand refers to an alias, that alias will be deleted.@param[in] Volatile if TRUE the Alias being set will be stored in a volatile fashion. if FALSE theAlias being set will be stored in a non-volatile fashion.@retval EFI_SUCCESS Alias created or deleted successfully.@retval EFI_NOT_FOUND the Alias intended to be deleted was not found
**/
EFI_STATUS
InternalSetAlias(IN CONST CHAR16 *Command,IN CONST CHAR16 *Alias,IN BOOLEAN Volatile)
{EFI_STATUS Status;CHAR16 *AliasLower;// Convert to lowercase to make aliases case-insensitiveif (Alias != NULL) {AliasLower = AllocateCopyPool (StrSize (Alias), Alias);if (AliasLower == NULL) {return EFI_OUT_OF_RESOURCES;}ToLower (AliasLower);} else {AliasLower = NULL;}//// We must be trying to remove one if Alias is NULL//if (Alias == NULL) {//// remove an alias (but passed in COMMAND parameter)//Status = (gRT->SetVariable((CHAR16*)Command, &gShellAliasGuid, 0, 0, NULL));} else {//// Add and replace are the same//// We dont check the error return on purpose since the variable may not exist.gRT->SetVariable((CHAR16*)Command, &gShellAliasGuid, 0, 0, NULL);Status = (gRT->SetVariable((CHAR16*)Alias, &gShellAliasGuid, EFI_VARIABLE_BOOTSERVICE_ACCESS|(Volatile?0:EFI_VARIABLE_NON_VOLATILE), StrSize(Command), (VOID*)Command));}if (Alias != NULL) {FreePool (AliasLower);}return Status;
}/**Changes a shell command alias.This function creates an alias for a shell command or if Alias is NULL it will delete an existing alias.@param[in] Command Points to the NULL-terminated shell command or existing alias.@param[in] Alias Points to the NULL-terminated alias for the shell command. If this is NULL, andCommand refers to an alias, that alias will be deleted.@param[in] Replace If TRUE and the alias already exists, then the existing alias will be replaced. IfFALSE and the alias already exists, then the existing alias is unchanged andEFI_ACCESS_DENIED is returned.@param[in] Volatile if TRUE the Alias being set will be stored in a volatile fashion. if FALSE theAlias being set will be stored in a non-volatile fashion.@retval EFI_SUCCESS Alias created or deleted successfully.@retval EFI_NOT_FOUND the Alias intended to be deleted was not found@retval EFI_ACCESS_DENIED The alias is a built-in alias or already existed and Replace was set toFALSE.@retval EFI_INVALID_PARAMETER Command is null or the empty string.
**/
EFI_STATUS
EFIAPI
EfiShellSetAlias(IN CONST CHAR16 *Command,IN CONST CHAR16 *Alias,IN BOOLEAN Replace,IN BOOLEAN Volatile)
{if (ShellCommandIsOnAliasList(Alias==NULL?Command:Alias)) {//// cant set over a built in alias//return (EFI_ACCESS_DENIED);} else if (Command == NULL || *Command == CHAR_NULL || StrLen(Command) == 0) {//// Command is null or empty//return (EFI_INVALID_PARAMETER);} else if (EfiShellGetAlias(Command, NULL) != NULL && !Replace) {//// Alias already exists, Replace not set//return (EFI_ACCESS_DENIED);} else {return (InternalSetAlias(Command, Alias, Volatile));}
}// Pure FILE_HANDLE operations are passed to FileHandleLib
// these functions are indicated by the *
EFI_SHELL_PROTOCOL mShellProtocol = {EfiShellExecute,EfiShellGetEnv,EfiShellSetEnv,EfiShellGetAlias,EfiShellSetAlias,EfiShellGetHelpText,EfiShellGetDevicePathFromMap,EfiShellGetMapFromDevicePath,EfiShellGetDevicePathFromFilePath,EfiShellGetFilePathFromDevicePath,EfiShellSetMap,EfiShellGetCurDir,EfiShellSetCurDir,EfiShellOpenFileList,EfiShellFreeFileList,EfiShellRemoveDupInFileList,EfiShellBatchIsActive,EfiShellIsRootShell,EfiShellEnablePageBreak,EfiShellDisablePageBreak,EfiShellGetPageBreak,EfiShellGetDeviceName,(EFI_SHELL_GET_FILE_INFO)FileHandleGetInfo, //*(EFI_SHELL_SET_FILE_INFO)FileHandleSetInfo, //*EfiShellOpenFileByName,EfiShellClose,EfiShellCreateFile,(EFI_SHELL_READ_FILE)FileHandleRead, //*(EFI_SHELL_WRITE_FILE)FileHandleWrite, //*(EFI_SHELL_DELETE_FILE)FileHandleDelete, //*EfiShellDeleteFileByName,(EFI_SHELL_GET_FILE_POSITION)FileHandleGetPosition, //*(EFI_SHELL_SET_FILE_POSITION)FileHandleSetPosition, //*(EFI_SHELL_FLUSH_FILE)FileHandleFlush, //*EfiShellFindFiles,EfiShellFindFilesInDir,(EFI_SHELL_GET_FILE_SIZE)FileHandleGetSize, //*EfiShellOpenRoot,EfiShellOpenRootByHandle,NULL,SHELL_MAJOR_VERSION,SHELL_MINOR_VERSION,// New for UEFI Shell 2.1EfiShellRegisterGuidName,EfiShellGetGuidName,EfiShellGetGuidFromName,EfiShellGetEnvEx
};/**Function to create and install on the current handle.Will overwrite any existing ShellProtocols in the system to be sure thatthe current shell is in control.This must be removed via calling CleanUpShellProtocol().@param[in, out] NewShell The pointer to the pointer to the structureto install.@retval EFI_SUCCESS The operation was successful.@return An error from LocateHandle, CreateEvent, or other core function.
**/
EFI_STATUS
CreatePopulateInstallShellProtocol (IN OUT EFI_SHELL_PROTOCOL **NewShell)
{EFI_STATUS Status;UINTN BufferSize;EFI_HANDLE *Buffer;UINTN HandleCounter;SHELL_PROTOCOL_HANDLE_LIST *OldProtocolNode;EFI_SHELL_PROTOCOL *OldShell;if (NewShell == NULL) {return (EFI_INVALID_PARAMETER);}BufferSize = 0;Buffer = NULL;OldProtocolNode = NULL;InitializeListHead(&ShellInfoObject.OldShellList.Link);//// Initialize EfiShellProtocol object...//Status = gBS->CreateEvent(0,0,NULL,NULL,&mShellProtocol.ExecutionBreak);if (EFI_ERROR(Status)) {return (Status);}//// Get the size of the buffer we need.//Status = gBS->LocateHandle(ByProtocol,&gEfiShellProtocolGuid,NULL,&BufferSize,Buffer);if (Status == EFI_BUFFER_TOO_SMALL) {//// Allocate and recall with buffer of correct size//Buffer = AllocateZeroPool(BufferSize);if (Buffer == NULL) {return (EFI_OUT_OF_RESOURCES);}Status = gBS->LocateHandle(ByProtocol,&gEfiShellProtocolGuid,NULL,&BufferSize,Buffer);if (EFI_ERROR(Status)) {FreePool(Buffer);return (Status);}//// now overwrite each of them, but save the info to restore when we end.//for (HandleCounter = 0 ; HandleCounter < (BufferSize/sizeof(EFI_HANDLE)) ; HandleCounter++) {Status = gBS->OpenProtocol(Buffer[HandleCounter],&gEfiShellProtocolGuid,(VOID **) &OldShell,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);if (!EFI_ERROR(Status)) {OldProtocolNode = AllocateZeroPool(sizeof(SHELL_PROTOCOL_HANDLE_LIST));if (OldProtocolNode == NULL) {if (!IsListEmpty (&ShellInfoObject.OldShellList.Link)) {CleanUpShellProtocol (&mShellProtocol);}Status = EFI_OUT_OF_RESOURCES;break;}//// reinstall over the old one...//OldProtocolNode->Handle = Buffer[HandleCounter];OldProtocolNode->Interface = OldShell;Status = gBS->ReinstallProtocolInterface(OldProtocolNode->Handle,&gEfiShellProtocolGuid,OldProtocolNode->Interface,(VOID*)(&mShellProtocol));if (!EFI_ERROR(Status)) {//// we reinstalled sucessfully. log this so we can reverse it later.////// add to the list for subsequent...//InsertTailList(&ShellInfoObject.OldShellList.Link, &OldProtocolNode->Link);}}}FreePool(Buffer);} else if (Status == EFI_NOT_FOUND) {ASSERT(IsListEmpty(&ShellInfoObject.OldShellList.Link));//// no one else published yet. just publish it ourselves.//Status = gBS->InstallProtocolInterface (&gImageHandle,&gEfiShellProtocolGuid,EFI_NATIVE_INTERFACE,(VOID*)(&mShellProtocol));}if (PcdGetBool(PcdShellSupportOldProtocols)){///@todo support ShellEnvironment2///@todo do we need to support ShellEnvironment (not ShellEnvironment2) also?}if (!EFI_ERROR(Status)) {*NewShell = &mShellProtocol;}return (Status);
}/**Opposite of CreatePopulateInstallShellProtocol.Free all memory and restore the system to the state it was in before callingCreatePopulateInstallShellProtocol.@param[in, out] NewShell The pointer to the new shell protocol structure.@retval EFI_SUCCESS The operation was successful.
**/
EFI_STATUS
CleanUpShellProtocol (IN OUT EFI_SHELL_PROTOCOL *NewShell)
{SHELL_PROTOCOL_HANDLE_LIST *Node2;//// if we need to restore old protocols...//if (!IsListEmpty(&ShellInfoObject.OldShellList.Link)) {for (Node2 = (SHELL_PROTOCOL_HANDLE_LIST *) GetFirstNode (&ShellInfoObject.OldShellList.Link); !IsListEmpty (&ShellInfoObject.OldShellList.Link); Node2 = (SHELL_PROTOCOL_HANDLE_LIST *) GetFirstNode (&ShellInfoObject.OldShellList.Link)) {RemoveEntryList (&Node2->Link);gBS->ReinstallProtocolInterface (Node2->Handle, &gEfiShellProtocolGuid, NewShell, Node2->Interface);FreePool (Node2);}} else {//// no need to restore//gBS->UninstallProtocolInterface (gImageHandle, &gEfiShellProtocolGuid, NewShell);}return EFI_SUCCESS;
}/**Cleanup the shell environment.@param[in, out] NewShell The pointer to the new shell protocol structure.@retval EFI_SUCCESS The operation was successful.
**/
EFI_STATUS
CleanUpShellEnvironment (IN OUT EFI_SHELL_PROTOCOL *NewShell)
{EFI_STATUS Status;EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *SimpleEx;CleanUpShellProtocol (NewShell);Status = gBS->CloseEvent(NewShell->ExecutionBreak);NewShell->ExecutionBreak = NULL;Status = gBS->OpenProtocol(gST->ConsoleInHandle,&gEfiSimpleTextInputExProtocolGuid,(VOID**)&SimpleEx,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);if (!EFI_ERROR (Status)) {Status = SimpleEx->UnregisterKeyNotify(SimpleEx, ShellInfoObject.CtrlCNotifyHandle1);Status = SimpleEx->UnregisterKeyNotify(SimpleEx, ShellInfoObject.CtrlCNotifyHandle2);Status = SimpleEx->UnregisterKeyNotify(SimpleEx, ShellInfoObject.CtrlCNotifyHandle3);Status = SimpleEx->UnregisterKeyNotify(SimpleEx, ShellInfoObject.CtrlCNotifyHandle4);Status = SimpleEx->UnregisterKeyNotify(SimpleEx, ShellInfoObject.CtrlSNotifyHandle1);Status = SimpleEx->UnregisterKeyNotify(SimpleEx, ShellInfoObject.CtrlSNotifyHandle2);Status = SimpleEx->UnregisterKeyNotify(SimpleEx, ShellInfoObject.CtrlSNotifyHandle3);Status = SimpleEx->UnregisterKeyNotify(SimpleEx, ShellInfoObject.CtrlSNotifyHandle4);}return (Status);
}/**Notification function for keystrokes.@param[in] KeyData The key that was pressed.@retval EFI_SUCCESS The operation was successful.
**/
EFI_STATUS
EFIAPI
NotificationFunction(IN EFI_KEY_DATA *KeyData)
{if ( ((KeyData->Key.UnicodeChar == L'c') &&(KeyData->KeyState.KeyShiftState == (EFI_SHIFT_STATE_VALID|EFI_LEFT_CONTROL_PRESSED) || KeyData->KeyState.KeyShiftState == (EFI_SHIFT_STATE_VALID|EFI_RIGHT_CONTROL_PRESSED))) ||(KeyData->Key.UnicodeChar == 3)){ if (ShellInfoObject.NewEfiShellProtocol->ExecutionBreak == NULL) {return (EFI_UNSUPPORTED);}return (gBS->SignalEvent(ShellInfoObject.NewEfiShellProtocol->ExecutionBreak));} else if ((KeyData->Key.UnicodeChar == L's') &&(KeyData->KeyState.KeyShiftState == (EFI_SHIFT_STATE_VALID|EFI_LEFT_CONTROL_PRESSED) || KeyData->KeyState.KeyShiftState == (EFI_SHIFT_STATE_VALID|EFI_RIGHT_CONTROL_PRESSED))){ ShellInfoObject.HaltOutput = TRUE;}return (EFI_SUCCESS);
}/**Function to start monitoring for CTRL-C using SimpleTextInputEx. This feature's enabled state was not known when the shell initially launched.@retval EFI_SUCCESS The feature is enabled.@retval EFI_OUT_OF_RESOURCES There is not enough mnemory available.
**/
EFI_STATUS
InernalEfiShellStartMonitor(VOID)
{EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *SimpleEx;EFI_KEY_DATA KeyData;EFI_STATUS Status;Status = gBS->OpenProtocol(gST->ConsoleInHandle,&gEfiSimpleTextInputExProtocolGuid,(VOID**)&SimpleEx,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);if (EFI_ERROR(Status)) {ShellPrintHiiEx(-1, -1, NULL,STRING_TOKEN (STR_SHELL_NO_IN_EX),ShellInfoObject.HiiHandle);return (EFI_SUCCESS);}if (ShellInfoObject.NewEfiShellProtocol->ExecutionBreak == NULL) {return (EFI_UNSUPPORTED);}KeyData.KeyState.KeyToggleState = 0;KeyData.Key.ScanCode = 0;KeyData.KeyState.KeyShiftState = EFI_SHIFT_STATE_VALID|EFI_LEFT_CONTROL_PRESSED;KeyData.Key.UnicodeChar = L'c';Status = SimpleEx->RegisterKeyNotify(SimpleEx,&KeyData,NotificationFunction,&ShellInfoObject.CtrlCNotifyHandle1);KeyData.KeyState.KeyShiftState = EFI_SHIFT_STATE_VALID|EFI_RIGHT_CONTROL_PRESSED;if (!EFI_ERROR(Status)) {Status = SimpleEx->RegisterKeyNotify(SimpleEx,&KeyData,NotificationFunction,&ShellInfoObject.CtrlCNotifyHandle2);}KeyData.KeyState.KeyShiftState = EFI_SHIFT_STATE_VALID|EFI_LEFT_CONTROL_PRESSED;KeyData.Key.UnicodeChar = 3;if (!EFI_ERROR(Status)) {Status = SimpleEx->RegisterKeyNotify(SimpleEx,&KeyData,NotificationFunction,&ShellInfoObject.CtrlCNotifyHandle3);}KeyData.KeyState.KeyShiftState = EFI_SHIFT_STATE_VALID|EFI_RIGHT_CONTROL_PRESSED;if (!EFI_ERROR(Status)) {Status = SimpleEx->RegisterKeyNotify(SimpleEx,&KeyData,NotificationFunction,&ShellInfoObject.CtrlCNotifyHandle4);}return (Status);
}