1. Update EFI_IP4_MODE_DATA: add MaxPacketSize to this structure to comply with UEFI...

[mirror_edk2.git] / ShellPkg / Include / Protocol / EfiShell.h

/** @file\r
  EFI Shell protocol as defined in the UEFI Shell 2.0 specification including errata.\r
  \r
  Copyright (c) 2006 - 2009, Intel Corporation                                                         \r
  All rights reserved. This program and the accompanying materials                          \r
  are licensed and made available under the terms and conditions of the BSD License         \r
  which accompanies this distribution.  The full text of the license may be found at        \r
  http://opensource.org/licenses/bsd-license.php                                            \r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
\r
**/\r
\r
#ifndef __EFI_SHELL_PROTOCOL__\r
#define __EFI_SHELL_PROTOCOL__\r
\r
#include <Protocol/SimpleFileSystem.h>\r
#include <Guid/FileInfo.h>\r
\r
#define EFI_SHELL_PROTOCOL_GUID \\r
  { \\r
  0x6302d008, 0x7f9b, 0x4f30, { 0x87, 0xac, 0x60, 0xc9, 0xfe, 0xf5, 0xda, 0x4e } \\r
  }\r
\r
// replaced EFI_LIST_ENTRY with LIST_ENTRY for simplicity.\r
// they are identical outside of the name.\r
typedef struct {\r
  LIST_ENTRY Link;\r
  EFI_STATUS Status;\r
  CONST CHAR16 *FullName;\r
  CONST CHAR16 *FileName;\r
  EFI_FILE_HANDLE Handle;\r
  EFI_FILE_INFO *Info;\r
} EFI_SHELL_FILE_INFO;\r
/**\r
  Returns whether any script files are currently being processed.\r
\r
  @retval TRUE                 There is at least one script file active.\r
  @retval FALSE                No script files are active now.\r
\r
**/\r
typedef\r
BOOLEAN\r
(EFIAPI *EFI_SHELL_BATCH_IS_ACTIVE) (\r
  VOID\r
  );\r
\r
/**\r
  Closes the file handle.\r
\r
  This function closes a specified file handle. All 'dirty' cached file data is \r
  flushed to the device, and the file is closed. In all cases, the handle is \r
  closed.\r
\r
  @param[in] FileHandle             The file handle to be closed\r
\r
  @retval EFI_SUCCESS           the file closed sucessfully\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_CLOSE_FILE)(\r
  IN EFI_FILE_HANDLE FileHandle\r
  );\r
\r
/**\r
  Creates a file or directory by name.\r
\r
  This function creates an empty new file or directory with the specified attributes and\r
  returns the new file's handle. If the file already exists and is read-only, then\r
  EFI_INVALID_PARAMETER will be returned.\r
  \r
  If the file already existed, it is truncated and its attributes updated. If the file is\r
  created successfully, the FileHandle is the file's handle, else, the FileHandle is NULL.\r
  \r
  If the file name begins with >v, then the file handle which is returned refers to the\r
  shell environment variable with the specified name. If the shell environment variable\r
  already exists and is non-volatile then EFI_INVALID_PARAMETER is returned.\r
\r
  @param[in] FileName       Pointer to null-terminated file path\r
  @param[in] FileAttribs    The new file's attrbiutes.  the different attributes are\r
                            described in EFI_FILE_PROTOCOL.Open().\r
  @param[out] FileHandle    On return, points to the created file handle or directory's handle\r
\r
  @retval EFI_SUCCESS       The file was opened.  FileHandle points to the new file's handle.\r
  @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.\r
  @retval EFI_UNSUPPORTED   could not open the file path\r
  @retval EFI_NOT_FOUND     the specified file could not be found on the devide, or could not\r
                            file the file system on the device.\r
  @retval EFI_NO_MEDIA      the device has no medium.\r
  @retval EFI_MEDIA_CHANGED The device has a different medium in it or the medium is no\r
                            longer supported.\r
  @retval EFI_DEVICE_ERROR The device reported an error or can't get the file path according\r
                            the DirName.\r
  @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r
  @retval EFI_WRITE_PROTECTED An attempt was made to create a file, or open a file for write\r
                            when the media is write-protected.\r
  @retval EFI_ACCESS_DENIED The service denied access to the file.\r
  @retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the file.\r
  @retval EFI_VOLUME_FULL   The volume is full.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_CREATE_FILE)(\r
  IN CONST CHAR16 *FileName,\r
  IN UINT64 FileAttribs,\r
  OUT EFI_FILE_HANDLE *FileHandle\r
  );\r
\r
/**\r
  Deletes the file specified by the file handle.\r
\r
  This function closes and deletes a file. In all cases, the file handle is closed. If the file\r
  cannot be deleted, the warning code EFI_WARN_DELETE_FAILURE is returned, but the\r
  handle is still closed.\r
\r
  @param[in] FileHandle           The file handle to delete.\r
\r
  @retval EFI_SUCCESS         The file was closed and deleted, and the handle was closed.\r
  @retval EFI_WARN_DELETE_FAILURE The handle was closed but the file was not deleted.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_DELETE_FILE)(\r
  IN EFI_FILE_HANDLE FileHandle\r
  );\r
\r
/**\r
  Deletes the file specified by the file name.\r
\r
  This function deletes a file.\r
\r
  @param[in] FileName             Points to the null-terminated file name.\r
\r
  @retval EFI_SUCCESS             The file was closed and deleted, and the handle was closed.\r
  @retval EFI_WARN_DELETE_FAILURE The handle was closed but the file was not deleted.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_DELETE_FILE_BY_NAME)(\r
  IN CONST CHAR16 *FileName\r
  );\r
\r
/**\r
  Disables the page break output mode.\r
**/\r
typedef\r
VOID\r
(EFIAPI *EFI_SHELL_DISABLE_PAGE_BREAK) (\r
VOID\r
);\r
\r
/**\r
  Enables the page break output mode.\r
**/\r
typedef\r
VOID\r
(EFIAPI *EFI_SHELL_ENABLE_PAGE_BREAK) (\r
VOID\r
);\r
\r
/**\r
  Execute the command line.\r
\r
  This function creates a nested instance of the shell and executes the specified\r
  command (CommandLine) with the specified environment (Environment). Upon return,\r
  the status code returned by the specified command is placed in StatusCode.\r
  \r
  If Environment is NULL, then the current environment is used and all changes made\r
  by the commands executed will be reflected in the current environment. If the\r
  Environment is non-NULL, then the changes made will be discarded.\r
  \r
  The CommandLine is executed from the current working directory on the current\r
  device.\r
\r
  @param[in] ParentImageHandle  A handle of the image that is executing the specified \r
                                command line.  \r
  @param[in] CommandLine        Points to the null-terminated UCS-2 encoded string \r
                                containing the command line. If NULL then the command-\r
                                line will be empty.\r
  @param[in] Environment        Points to a null-terminated array of environment \r
                                variables with the format 'x=y', where x is the \r
                                environment variable name and y is the value. If this\r
                                is NULL, then the current shell environment is used.\r
  @param[out] ErrorCode         Points to the status code returned by the command.\r
\r
  @retval EFI_SUCCESS           The command executed successfully. The  status code \r
                                returned by the command is pointed to by StatusCode.\r
  @retval EFI_INVALID_PARAMETER The parameters are invalid.\r
  @retval EFI_OUT_OF_RESOURCES  Out of resources.\r
  @retval EFI_UNSUPPORTED       Nested shell invocations are not allowed.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_EXECUTE) (\r
  IN EFI_HANDLE *ParentImageHandle,\r
  IN CHAR16 *CommandLine OPTIONAL,\r
  IN CHAR16 **Environment OPTIONAL,\r
  OUT EFI_STATUS *StatusCode OPTIONAL\r
  );\r
\r
/**\r
  Find files that match a specified pattern.\r
\r
  This function searches for all files and directories that match the specified\r
  FilePattern. The FilePattern can contain wild-card characters. The resulting file\r
  information is placed in the file list FileList.\r
\r
  The files in the file list are not opened. The OpenMode field is set to 0 and the FileInfo\r
  field is set to NULL.\r
\r
  @param[in] FilePattern        Points to a null-terminated shell file path, including wildcards.\r
  @param[out] FileList          On return, points to the start of a file list containing the names \r
                                of all matching files or else points to NULL if no matching files \r
                                were found.\r
\r
  @retval EFI_SUCCESS           Files found.\r
  @retval EFI_NOT_FOUND         No files found.\r
  @retval EFI_NO_MEDIA          The device has no media\r
  @retval EFI_DEVICE_ERROR      The device reported an error\r
  @retval EFI_VOLUME_CORRUPTED  The file system structures are corrupted\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_FIND_FILES)(\r
  IN CONST CHAR16 *FilePattern,\r
  OUT EFI_SHELL_FILE_INFO **FileList\r
  );\r
\r
/**\r
  Find all files in a specified directory.\r
\r
  @param[in] FileDirHandle      Handle of the directory to search.\r
  @param[out] FileList          On return, points to the list of files in the directory \r
                                or NULL if there are no files in the directory.\r
\r
  @retval EFI_SUCCESS           File information was returned successfully.\r
  @retval EFI_VOLUME_CORRUPTED  The file system structures have been corrupted.\r
  @retval EFI_DEVICE_ERROR      The device reported an error.\r
  @retval EFI_NO_MEDIA          The device media is not present.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_FIND_FILES_IN_DIR)(\r
IN EFI_FILE_HANDLE FileDirHandle,\r
OUT EFI_SHELL_FILE_INFO **FileList\r
);\r
\r
/**\r
  Flushes data back to a device\r
  \r
  This function flushes all modified data associated with a file to a device.\r
\r
  @param[in] FileHandle             The handle of the file to flush\r
\r
  @retval EFI_SUCCESS           The data was flushed.\r
  @retval EFI_NO_MEDIA          The device has no medium.\r
  @retval EFI_DEVICE_ERROR      The device reported an error.\r
  @retval EFI_VOLUME_CORRUPTED  The file system structures are corrupted.\r
  @retval EFI_WRITE_PROTECTED   The file or medium is write-protected.\r
  @retval EFI_ACCESS_DENIED     The file was opened read-only.\r
  @retval EFI_VOLUME_FULL       The volume is full.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_FLUSH_FILE)(\r
  IN EFI_FILE_HANDLE FileHandle\r
  );\r
\r
/**\r
  Frees the file list.\r
  \r
  This function cleans up the file list and any related data structures. It has no\r
  impact on the files themselves.\r
\r
  @param[in] FileList               The file list to free. Type EFI_SHELL_FILE_INFO is \r
                                defined in OpenFileList()\r
\r
  @retval EFI_SUCCESS           Free the file list successfully.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_FREE_FILE_LIST) (\r
  IN EFI_SHELL_FILE_INFO **FileList\r
  );\r
\r
/**\r
  Returns the current directory on the specified device.\r
\r
  If FileSystemMapping is NULL, it returns the current working directory. If the\r
  FileSystemMapping is not NULL, it returns the current directory associated with the\r
  FileSystemMapping. In both cases, the returned name includes the file system\r
  mapping (i.e. fs0:\current-dir).\r
\r
  @param[in] FileSystemMapping      A pointer to the file system mapping. If NULL, \r
                                then the current working directory is returned.\r
  \r
  @retval !=NULL                The current directory.\r
  @retval NULL                  Current directory does not exist.\r
**/\r
typedef\r
CONST CHAR16 *\r
(EFIAPI *EFI_SHELL_GET_CUR_DIR) (\r
  IN CONST CHAR16 *FileSystemMapping OPTIONAL\r
  );\r
\r
typedef UINT32 EFI_SHELL_DEVICE_NAME_FLAGS;\r
#define EFI_DEVICE_NAME_USE_COMPONENT_NAME  0x00000001\r
#define EFI_DEVICE_NAME_USE_DEVICE_PATH     0x00000002\r
/**\r
  Gets the name of the device specified by the device handle.\r
\r
  This function gets the user-readable name of the device specified by the device\r
  handle. If no user-readable name could be generated, then *BestDeviceName will be\r
  NULL and EFI_NOT_FOUND will be returned.\r
\r
  If EFI_DEVICE_NAME_USE_COMPONENT_NAME is set, then the function will return the\r
  device's name using the EFI_COMPONENT_NAME2_PROTOCOL, if present on\r
  DeviceHandle.\r
\r
  If EFI_DEVICE_NAME_USE_DEVICE_PATH is set, then the function will return the\r
  device's name using the EFI_DEVICE_PATH_PROTOCOL, if present on DeviceHandle.\r
  If both EFI_DEVICE_NAME_USE_COMPONENT_NAME and\r
  EFI_DEVICE_NAME_USE_DEVICE_PATH are set, then\r
  EFI_DEVICE_NAME_USE_COMPONENT_NAME will have higher priority.\r
\r
  @param[in] DeviceHandle       The handle of the device.\r
  @param[in] Flags              Determines the possible sources of component names. \r
  @param[in] Language           A pointer to the language specified for the device \r
                                name, in the same format as described in the UEFI \r
                                specification, Appendix M \r
  @param[out] BestDeviceName    On return, points to the callee-allocated null-\r
                                terminated name of the device. If no device name \r
                                could be found, points to NULL. The name must be \r
                                freed by the caller...\r
\r
  @retval EFI_SUCCESS           Get the name successfully.\r
  @retval EFI_NOT_FOUND         Fail to get the device name.\r
**/\r
typedef\r
EFI_STATUS\r
(*EFI_SHELL_GET_DEVICE_NAME) (\r
  IN EFI_HANDLE DeviceHandle,\r
  IN EFI_SHELL_DEVICE_NAME_FLAGS Flags,\r
  IN CHAR8 *Language,\r
  OUT CHAR16 **BestDeviceName\r
  );\r
\r
/**\r
  Gets the device path from the mapping.\r
\r
  This function gets the device path associated with a mapping.\r
\r
  @param[in] Mapping                A pointer to the mapping\r
\r
  @retval !=NULL                Pointer to the device path that corresponds to the \r
                                device mapping. The returned pointer does not need \r
                                to be freed.\r
  @retval NULL                  There is no device path associated with the \r
                                specified mapping.\r
**/\r
typedef\r
CONST EFI_DEVICE_PATH_PROTOCOL *\r
(EFIAPI *EFI_SHELL_GET_DEVICE_PATH_FROM_MAP) (\r
  IN CONST CHAR16 *Mapping\r
  );\r
\r
/**\r
  Converts a file system style name to a device path.\r
\r
  This function converts a file system style name to a device path, by replacing any\r
  mapping references to the associated device path.\r
\r
  @param[in] Path                   the pointer to the path\r
\r
  @return all                   The pointer of the file path. The file path is callee \r
                                allocated and should be freed by the caller.\r
**/\r
typedef\r
EFI_DEVICE_PATH_PROTOCOL *\r
(EFIAPI *EFI_SHELL_GET_DEVICE_PATH_FROM_FILE_PATH) (\r
  IN CONST CHAR16 *Path\r
  );\r
\r
/**\r
  This function updated with errata.\r
\r
  Gets either a single or list of environment variables.\r
\r
  If name is not NULL then this function returns the current value of the specified \r
  environment variable.\r
\r
  If Name is NULL than a list of all environment variable names is returned.  Each a \r
  NULL terminated string with a double NULL terminating the list.\r
\r
  @param[in] Name                   A pointer to the environment variable name.  If \r
                                Name is NULL, then the function will return all \r
                                of the defined shell environment variables.  In \r
                                the case where multiple environment variables are \r
                                being returned, each variable will be terminated by \r
                                a NULL, and the list will be terminated by a double \r
                                NULL.\r
\r
  @return !=NULL                A pointer to the returned string.\r
                                The returned pointer does not need to be freed by the caller.\r
\r
  @retval NULL                  The environment variable doesn't exist or there are \r
                                no environment variables.\r
**/\r
typedef\r
CONST CHAR16 *\r
(EFIAPI *EFI_SHELL_GET_ENV) (\r
  IN CONST CHAR16 *Name OPTIONAL\r
  );\r
\r
/**\r
  Gets the file information from an open file handle.\r
\r
  This function allocates a buffer to store the file's information. It's the caller's\r
  responsibility to free the buffer.\r
\r
  @param[in] FileHandle             A File Handle\r
\r
  @return !=NULL                Cannot get the file info.\r
  @return NULL                  A pointer to a buffer with file information.\r
**/\r
typedef\r
EFI_FILE_INFO *\r
(EFIAPI *EFI_SHELL_GET_FILE_INFO)(\r
  IN EFI_FILE_HANDLE FileHandle\r
  );\r
\r
/**\r
  Converts a device path to a file system-style path.\r
\r
  This function converts a device path to a file system path by replacing part, or all, of\r
  the device path with the file-system mapping. If there are more than one application\r
  file system mappings, the one that most closely matches Path will be used.\r
\r
  @param[in] Path                   The pointer to the device path\r
\r
  @return all                   The pointer of the null-terminated file path. The path \r
                                is callee-allocated and should be freed by the caller.\r
**/\r
typedef\r
CHAR16 *\r
(EFIAPI *EFI_SHELL_GET_FILE_PATH_FROM_DEVICE_PATH) (\r
  IN CONST EFI_DEVICE_PATH_PROTOCOL *Path\r
  );\r
\r
/**\r
  Gets a file's current position\r
\r
  This function returns the current file position for the file handle. For directories, the\r
  current file position has no meaning outside of the file system driver and as such, the\r
  operation is not supported.\r
\r
  @param[in] FileHandle         The file handle on which to get the current position.\r
  @paramp[out] Position         Byte position from the start of the file\r
\r
  @retval EFI_SUCCESS           Data was accessed.\r
  @retval EFI_UNSUPPORTED       The request is not valid on open directories.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_GET_FILE_POSITION)(\r
  IN EFI_FILE_HANDLE FileHandle,\r
  OUT UINT64 *Position\r
  );\r
\r
/**\r
  Gets the size of a file.\r
\r
  This function returns the size of the file specified by FileHandle.\r
\r
  @param[in] FileHandle         The handle of the file.\r
  @param[out] Size              The size of this file.\r
\r
  @retval EFI_SUCCESS           Get the file's size.\r
  @retval EFI_DEVICE_ERROR      Can't access the file.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_GET_FILE_SIZE)(\r
  IN EFI_FILE_HANDLE FileHandle,\r
  OUT UINT64 *Size\r
  );\r
\r
/**\r
  Return help information about a specific command.\r
\r
  This function returns the help information for the specified command. The help text\r
  can be internal to the shell or can be from a UEFI Shell manual page.\r
  \r
  If Sections is specified, then each section name listed will be compared in a casesensitive\r
  manner, to the section names described in Appendix B. If the section exists,\r
  it will be appended to the returned help text. If the section does not exist, no\r
  information will be returned. If Sections is NULL, then all help text information\r
  available will be returned.\r
\r
  @param[in] Command            Points to the null-terminated UEFI Shell command name.\r
  @param[in] Sections           Points to the null-terminated comma-delimited \r
                                section names to return. If NULL, then all \r
                                sections will be returned.\r
  @param[out] HelpText          On return, points to a callee-allocated buffer \r
                                containing all specified help text.\r
\r
  @retval EFI_SUCCESS           The help text was returned.\r
  @retval EFI_OUT_OF_RESOURCES  The necessary buffer could not be allocated to hold the \r
                                returned help text.\r
  @retval EFI_INVALID_PARAMETER HelpText is NULL\r
  @retval EFI_NOT_FOUND         There is no help text available for Command.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_GET_HELP_TEXT) (\r
  IN CONST CHAR16 *Command,\r
  IN CONST CHAR16 *Sections OPTIONAL,\r
  OUT CHAR16 **HelpText\r
  );\r
\r
/**\r
  This funciton is updated with Errata.\r
\r
  Gets the mapping(s) that most closely matches the device path.\r
\r
  This function gets the mapping which corresponds to the device path *DevicePath. If\r
  there is no exact match, then the mapping which most closely matches *DevicePath\r
  is returned, and *DevicePath is updated to point to the remaining portion of the\r
  device path. If there is an exact match, the mapping is returned and *DevicePath\r
  points to the end-of-device-path node.\r
\r
  If there are multiple map names they will be semi-colon seperated in the \r
  NULL-terminated string.\r
\r
  @param[in,out] DevicePath     On entry, points to a device path pointer. On \r
                                exit, updates the pointer to point to the \r
                                portion of the device path after the mapping.\r
\r
  @retval NULL                  No mapping was found.\r
  @return !=NULL                Pointer to null-terminated mapping. The buffer \r
                                is callee allocated and should be freed by the caller.\r
**/\r
typedef\r
CONST CHAR16 *\r
(EFIAPI *EFI_SHELL_GET_MAP_FROM_DEVICE_PATH) (\r
  IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath\r
  );\r
\r
/**\r
  Gets the enable status of the page break output mode.\r
\r
  User can use this function to determine current page break mode.\r
\r
  @retval TRUE                  The page break output mode is enabled\r
  @retval FALSE                 The page break output mode is disabled\r
**/\r
typedef\r
BOOLEAN\r
(EFIAPI *EFI_SHELL_GET_PAGE_BREAK) (\r
  VOID\r
  );\r
\r
/**\r
  Judges whether the active shell is the root shell.\r
\r
  This function makes the user to know that whether the active Shell is the root shell.\r
\r
  @retval TRUE                  The active Shell is the root Shell.\r
  @retval FALSE                 The active Shell is NOT the root Shell.\r
**/\r
typedef\r
BOOLEAN\r
(EFIAPI *EFI_SHELL_IS_ROOT_SHELL) (\r
VOID\r
);\r
\r
/**\r
  Opens a file or a directory by file name.\r
\r
  This function opens the specified file in the specified OpenMode and returns a file\r
  handle.\r
  If the file name begins with >v, then the file handle which is returned refers to the\r
  shell environment variable with the specified name. If the shell environment variable\r
  exists, is non-volatile and the OpenMode indicates EFI_FILE_MODE_WRITE, then\r
  EFI_INVALID_PARAMETER is returned.\r
\r
  If the file name is >i, then the file handle which is returned refers to the standard\r
  input. If the OpenMode indicates EFI_FILE_MODE_WRITE, then EFI_INVALID_PARAMETER\r
  is returned.\r
\r
  If the file name is >o, then the file handle which is returned refers to the standard\r
  output. If the OpenMode indicates EFI_FILE_MODE_READ, then EFI_INVALID_PARAMETER\r
  is returned.\r
\r
  If the file name is >e, then the file handle which is returned refers to the standard\r
  error. If the OpenMode indicates EFI_FILE_MODE_READ, then EFI_INVALID_PARAMETER\r
  is returned.\r
\r
  If the file name is NUL, then the file handle that is returned refers to the standard NUL\r
  file. If the OpenMode indicates EFI_FILE_MODE_READ, then EFI_INVALID_PARAMETER is\r
  returned.\r
\r
  If return EFI_SUCCESS, the FileHandle is the opened file's handle, else, the\r
  FileHandle is NULL.\r
\r
  @param[in] FileName           Points to the null-terminated UCS-2 encoded file name.\r
  @param[out] FileHandle        On return, points to the file handle.\r
  @param[in] OpenMode           File open mode. Either EFI_FILE_MODE_READ or \r
                                EFI_FILE_MODE_WRITE from section 12.4 of the UEFI \r
                                Specification.\r
  @retval EFI_SUCCESS           The file was opened. FileHandle has the opened file's handle.\r
  @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value. FileHandle is NULL.\r
  @retval EFI_UNSUPPORTED       Could not open the file path. FileHandle is NULL.\r
  @retval EFI_NOT_FOUND         The specified file could not be found on the device or the file\r
                                system could not be found on the device. FileHandle is NULL.\r
  @retval EFI_NO_MEDIA          The device has no medium. FileHandle is NULL.\r
  @retval EFI_MEDIA_CHANGED     The device has a different medium in it or the medium is no\r
                                longer supported. FileHandle is NULL.\r
  @retval EFI_DEVICE_ERROR      The device reported an error or can't get the file path according\r
                                the FileName. FileHandle is NULL.\r
  @retval EFI_VOLUME_CORRUPTED  The file system structures are corrupted. FileHandle is NULL.\r
  @retval EFI_WRITE_PROTECTED   An attempt was made to create a file, or open a file for write\r
                                when the media is write-protected. FileHandle is NULL.\r
  @retval EFI_ACCESS_DENIED     The service denied access to the file. FileHandle is NULL.\r
  @retval EFI_OUT_OF_RESOURCES  Not enough resources were available to open the file. FileHandle\r
                                is NULL.\r
  @retval EFI_VOLUME_FULL       The volume is full. FileHandle is NULL.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_OPEN_FILE_BY_NAME) (\r
  IN CONST CHAR16 *FileName,\r
  OUT EFI_FILE_HANDLE *FileHandle,\r
  IN UINT64 OpenMode\r
  );\r
\r
/**\r
  Opens the files that match the path specified.\r
\r
  This function opens all of the files specified by Path. Wildcards are processed\r
  according to the rules specified in UEFI Shell 2.0 spec section 3.7.1. Each \r
  matching file has an EFI_SHELL_FILE_INFO structure created in a linked list.\r
\r
  @param[in] Path               A pointer to the path string.\r
  @param[in] OpenMode           Specifies the mode used to open each file, EFI_FILE_MODE_READ or\r
                                EFI_FILE_MODE_WRITE.\r
  @param[in,out] FileList       Points to the start of a list of files opened.\r
\r
  @retval EFI_SUCCESS           Create the file list successfully.\r
  @return Others                Can't create the file list.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_OPEN_FILE_LIST) (\r
  IN CHAR16 *Path,\r
  IN UINT64 OpenMode,\r
  IN OUT EFI_SHELL_FILE_INFO **FileList\r
  );\r
\r
/**\r
  Opens the root directory of a device.\r
\r
  This function opens the root directory of a device and returns a file handle to it.\r
\r
  @param[in] DevicePath         Points to the device path corresponding to the device where the\r
                                EFI_SIMPLE_FILE_SYSTEM_PROTOCOL is installed.\r
  @param[out] FileHandle        On exit, points to the file handle corresponding to the root directory on the\r
                                device.\r
\r
  @retval EFI_SUCCESS           Root opened successfully.\r
  @retval EFI_NOT_FOUND         EFI_SIMPLE_FILE_SYSTEM could not be found or the root directory\r
                                could not be opened.\r
  @retval EFI_VOLUME_CORRUPTED  The data structures in the volume were corrupted.\r
  @retval EFI_DEVICE_ERROR      The device had an error\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_OPEN_ROOT)(\r
  IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,\r
  OUT EFI_FILE_HANDLE *FileHandle\r
  );\r
\r
/**\r
  Opens the root directory of a device on a handle\r
\r
  This function opens the root directory of a device and returns a file handle to it.\r
\r
  @param[in] DeviceHandle       The handle of the device that contains the volume.\r
  @param[out] FileHandle        On exit, points to the file handle corresponding to the root directory on the\r
                                device.\r
\r
  @retval EFI_SUCCESS           Root opened successfully.\r
  @retval EFI_NOT_FOUND         EFI_SIMPLE_FILE_SYSTEM could not be found or the root directory\r
                                could not be opened.\r
  @retval EFI_VOLUME_CORRUPTED  The data structures in the volume were corrupted.\r
  @retval EFI_DEVICE_ERROR      The device had an error\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_OPEN_ROOT_BY_HANDLE)(\r
  IN EFI_HANDLE DeviceHandle,\r
  OUT EFI_FILE_HANDLE *FileHandle\r
  );\r
\r
/**\r
  Reads data from the file.\r
\r
  If FileHandle is not a directory, the function reads the requested number of bytes\r
  from the file at the file's current position and returns them in Buffer. If the read goes\r
  beyond the end of the file, the read length is truncated to the end of the file. The file's\r
  current position is increased by the number of bytes returned.\r
  If FileHandle is a directory, then an error is returned.\r
\r
  @param[in] FileHandle         The opened file handle for read\r
  @param[in] ReadSize           On input, the size of Buffer, in bytes. On output, the amount of data read.\r
  @param[in,out] Buffer         The buffer in which data is read.\r
\r
  @retval EFI_SUCCESS           Data was read.\r
  @retval EFI_NO_MEDIA          The device has no media\r
  @retval EFI_DEVICE_ERROR      The device reported an error\r
  @retval EFI_VOLUME_CORRUPTED  The file system structures are corrupted\r
  @retval EFI_BUFFER_TO_SMALL   Buffer is too small. ReadSize contains required size\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_READ_FILE) (\r
  IN EFI_FILE_HANDLE FileHandle,\r
  IN OUT UINTN *ReadSize,\r
  IN OUT VOID *Buffer\r
  );\r
\r
/**\r
  Deletes the duplicate file names files in the given file list.\r
\r
  This function deletes the reduplicate files in the given file list.\r
\r
  @param[in] FileList           A pointer to the first entry in the file list.\r
\r
  @retval EFI_SUCCESS           Always success.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_REMOVE_DUP_IN_FILE_LIST) (\r
  IN EFI_SHELL_FILE_INFO **FileList\r
  );\r
\r
//\r
// The SetAlias and GetAlias functions were affected by errata.  \r
// They are not UEFI Shell 2.0 (no errata) compliant.\r
//\r
\r
/**\r
  Changes a shell command alias.\r
\r
  This function creates an alias for a shell command.\r
\r
  @param[in] Command            Points to the null-terminated shell command or existing alias.\r
  @param[in] Alias              Points to the null-terminated alias for the shell command. If this is NULL, and\r
                                Command refers to an alias, that alias will be deleted.\r
  @param[in] Replace            If TRUE and the alias already exists, then the existing alias will be replaced. If\r
                                FALSE and the alias already exists, then the existing alias is unchanged and\r
                                EFI_ACCESS_DENIED is returned.\r
  @param[in] Volatile           if TRUE the Alias being set will be stored in a volatile fashion.  if FALSE the \r
                                Alias being set will be stored in a non-volatile fashion.\r
\r
  @retval EFI_SUCCESS           Alias created or deleted successfully.\r
  @retval EFI_ACCESS_DENIED     The alias is a built-in alias or already existed and Replace was set to\r
                                FALSE.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_SHELL_SET_ALIAS)(\r
  IN CONST CHAR16 *Command,\r
  IN CONST CHAR16 *Alias,\r
  IN BOOLEAN Replace,\r
  IN BOOLEAN Volatile\r
  );\r
\r
/**\r
  This function returns the alias associated with a command.\r
\r
  @param[in] Command            Points to the null-terminated shell command. \r
                                If this parameter is NULL, then all commands \r
                                aliases will be returned in ReturnedData.\r
  @param[out] ReturnedData    	If Command is not NULL, ReturnedData points to \r
                                the null-terminated alias for the shell command. \r