[mirror_edk2.git] / EmbeddedPkg / Include / Library / EfiFileLib.h

/** @file\r
  Library functions that perform file IO. Memory buffer, file system, and\r
  firmware volume operations are supported.\r
\r
  Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>\r
  Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
  Basic support for opening files on different device types. The device string\r
  is in the form of DevType:Path. Current DevType is required as there is no\r
  current mounted device concept of current working directory concept implement\r
  by this library.\r
\r
  Device names are case insensitive and only check the leading characters for\r
  unique matches. Thus the following are all the same:\r
    LoadFile0:\r
    l0:\r
    L0:\r
    Lo0:\r
\r
  Supported Device Names:\r
  A0x1234:0x12 - A memory buffer starting at address 0x1234 for 0x12 bytes\r
  l1:          - EFI LoadFile device one.\r
  B0:          - EFI BlockIo zero.\r
  fs3:         - EFI Simple File System device 3\r
  Fv2:         - EFI Firmware Volume device 2\r
  1.2.3.4:name - TFTP IP and file name\r
\r
**/\r
\r
#ifndef __EFI_FILE_LIB_H__\r
#define __EFI_FILE_LIB_H__\r
\r
#include <PiDxe.h>\r
#include <Protocol/FirmwareVolume2.h>\r
#include <Protocol/FirmwareVolumeBlock.h>\r
#include <Protocol/BlockIo.h>\r
#include <Protocol/LoadFile.h>\r
#include <Protocol/LoadFile.h>\r
#include <Protocol/SimpleFileSystem.h>\r
#include <Guid/FileInfo.h>\r
#include <Guid/FileSystemInfo.h>\r
\r
#define MAX_PATHNAME  0x200\r
\r
/// Type of the file that has been opened\r
typedef enum {\r
  EfiOpenLoadFile,\r
  EfiOpenMemoryBuffer,\r
  EfiOpenFirmwareVolume,\r
  EfiOpenFileSystem,\r
  EfiOpenBlockIo,\r
  EfiOpenTftp,\r
  EfiOpenMaxValue\r
} EFI_OPEN_FILE_TYPE;\r
\r
/// Public information about the open file\r
typedef struct {\r
  UINTN                            Version;       // Common information\r
  EFI_OPEN_FILE_TYPE               Type;\r
  EFI_DEVICE_PATH_PROTOCOL         *DevicePath;\r
  EFI_STATUS                       LastError;\r
  EFI_HANDLE                       EfiHandle;\r
  CHAR8                            *DeviceName;\r
  CHAR8                            *FileName;\r
\r
  UINT64                           CurrentPosition; // Information for Seek\r
  UINT64                           MaxPosition;\r
\r
  UINTN                            BaseOffset;    // Base offset for hexdump command\r
\r
  UINTN                            Size;          // Valid for all types other than l#:\r
  UINT8                            *Buffer;       // Information valid for A#:\r
\r
  EFI_FIRMWARE_VOLUME2_PROTOCOL    *Fv;           // Information valid for Fv#:\r
  EFI_GUID                         FvNameGuid;\r
  EFI_SECTION_TYPE                 FvSectionType;\r
  EFI_FV_FILETYPE                  FvType;\r
  EFI_FV_FILE_ATTRIBUTES           FvAttributes;\r
\r
  EFI_PHYSICAL_ADDRESS             FvStart;\r
  UINTN                            FvSize;\r
  UINTN                            FvHeaderSize;\r
\r
  EFI_FILE                         *FsFileHandle; // Information valid for Fs#:\r
  EFI_FILE_SYSTEM_INFO             *FsInfo;\r
  EFI_FILE_INFO                    *FsFileInfo;\r
  EFI_BLOCK_IO_MEDIA               *FsBlockIoMedia; // Information valid for Fs#: or B#:\r
  EFI_BLOCK_IO_PROTOCOL            *FsBlockIo;      // Information valid for Fs#: or B#:\r
\r
  UINTN                            DiskOffset;    // Information valid for B#:\r
\r
  EFI_LOAD_FILE_PROTOCOL           *LoadFile;     // Information valid for l#:\r
\r
  EFI_IP_ADDRESS                   ServerIp;      // Information valid for t:\r
  BOOLEAN                          IsDirty;\r
  BOOLEAN                          IsBufferValid;\r
} EFI_OPEN_FILE;\r
\r
/// Type of Seek to perform\r
typedef enum {\r
  EfiSeekStart,\r
  EfiSeekCurrent,\r
  EfiSeekEnd,\r
  EfiSeekMax\r
} EFI_SEEK_TYPE;\r
\r
/**\r
  Open a device named by PathName. The PathName includes a device name and\r
  path separated by a :. See file header for more details on the PathName\r
  syntax. There is no checking to prevent a file from being opened more than\r
  one type.\r
\r
  SectionType is only used to open an FV. Each file in an FV contains multiple\r
  sections and only the SectionType section is opened.\r
\r
  For any file that is opened with EfiOpen() must be closed with EfiClose().\r
\r
  @param  PathName    Path to parse to open\r
  @param  OpenMode    Same as EFI_FILE.Open()\r
  @param  SectionType Section in FV to open.\r
\r
  @return NULL  Open failed\r
  @return Valid EFI_OPEN_FILE handle\r
\r
**/\r
EFI_OPEN_FILE *\r
EfiOpen (\r
  IN        CHAR8             *PathName,\r
  IN  CONST UINT64            OpenMode,\r
  IN  CONST EFI_SECTION_TYPE  SectionType\r
  );\r
\r
EFI_STATUS\r
EfiCopyFile (\r
  IN        CHAR8  *DestinationFile,\r
  IN        CHAR8  *SourceFile\r
  );\r
\r
/**\r
  Use DeviceType and Index to form a valid PathName and try and open it.\r
\r
  @param  DeviceType  Device type to open\r
  @param  Index       Device Index to use. Zero relative.\r
\r
  @return NULL  Open failed\r
  @return Valid EFI_OPEN_FILE handle\r
\r
**/\r
EFI_OPEN_FILE  *\r
EfiDeviceOpenByType (\r
  IN  EFI_OPEN_FILE_TYPE  DeviceType,\r
  IN  UINTN               Index\r
  );\r
\r
/**\r
  Close a file handle opened by EfiOpen() and free all resources allocated by\r
  EfiOpen().\r
\r
  @param  Stream    Open File Handle\r
\r
  @return EFI_INVALID_PARAMETER  Stream is not an Open File\r
  @return EFI_SUCCESS            Steam closed\r
\r
**/\r
EFI_STATUS\r
EfiClose (\r
  IN  EFI_OPEN_FILE  *Stream\r
  );\r
\r
/**\r
  Return the size of the file represented by Stream. Also return the current\r
  Seek position. Opening a file will enable a valid file size to be returned.\r
  LoadFile is an exception as a load file size is set to zero.\r
\r
  @param  Stream    Open File Handle\r
\r
  @return 0         Stream is not an Open File or a valid LoadFile handle\r
\r
**/\r
UINTN\r
EfiTell (\r
  IN  EFI_OPEN_FILE  *Stream,\r
  OUT UINT64         *CurrentPosition   OPTIONAL\r
  );\r
\r
/**\r
  Seek to the Offset location in the file. LoadFile and FV device types do\r
  not support EfiSeek(). It is not possible to grow the file size using\r
  EfiSeek().\r
\r
  SeekType defines how use Offset to calculate the new file position:\r
  EfiSeekStart  : Position = Offset\r
  EfiSeekCurrent: Position is Offset bytes from the current position\r
  EfiSeekEnd    : Only supported if Offset is zero to seek to end of file.\r
\r
  @param  Stream    Open File Handle\r
  @param  Offset    Offset to seek too.\r
  @param  SeekType  Type of seek to perform\r
\r
\r
  @return EFI_INVALID_PARAMETER  Stream is not an Open File\r
  @return EFI_UNSUPPORTED        LoadFile and FV does not support Seek\r
  @return EFI_NOT_FOUND          Seek past the end of the file.\r
  @return EFI_SUCCESS            Steam closed\r
\r
**/\r
EFI_STATUS\r
EfiSeek (\r
  IN  EFI_OPEN_FILE  *Stream,\r
  IN  EFI_LBA        Offset,\r
  IN  EFI_SEEK_TYPE  SeekType\r
  );\r
\r
/**\r
  Read BufferSize bytes from the current location in the file. For load file\r
  and FV case you must read the entire file.\r
\r
  @param  Stream      Open File Handle\r
  @param  Buffer      Caller allocated buffer.\r
  @param  BufferSize  Size of buffer in bytes.\r
\r
\r
  @return EFI_SUCCESS           Stream is not an Open File\r
  @return EFI_END_OF_FILE Tried to read past the end of the file\r
  @return EFI_INVALID_PARAMETER Stream is not an open file handle\r
  @return EFI_BUFFER_TOO_SMALL  Buffer is not big enough to do the read\r
  @return "other"               Error returned from device read\r
\r
**/\r
EFI_STATUS\r
EfiRead (\r
  IN  EFI_OPEN_FILE  *Stream,\r
  OUT VOID           *Buffer,\r
  OUT UINTN          *BufferSize\r
  );\r
\r
/**\r
  Read the entire file into a buffer. This routine allocates the buffer and\r
  returns it to the user full of the read data.\r
\r
  This is very useful for load file where it's hard to know how big the buffer\r
  must be.\r
\r
  @param  Stream      Open File Handle\r
  @param  Buffer      Pointer to buffer to return.\r
  @param  BufferSize  Pointer to Size of buffer return..\r
\r
\r
  @return EFI_SUCCESS           Stream is not an Open File\r
  @return EFI_END_OF_FILE       Tried to read past the end of the file\r
  @return EFI_INVALID_PARAMETER Stream is not an open file handle\r
  @return EFI_BUFFER_TOO_SMALL  Buffer is not big enough to do the read\r
  @return "other"               Error returned from device read\r
\r
**/\r
EFI_STATUS\r
EfiReadAllocatePool (\r
  IN  EFI_OPEN_FILE  *Stream,\r
  OUT VOID           **Buffer,\r
  OUT UINTN          *BufferSize\r
  );\r
\r
/**\r
  Write data back to the file.\r
\r
  @param  Stream      Open File Handle\r
  @param  Buffer      Pointer to buffer to return.\r
  @param  BufferSize  Pointer to Size of buffer return..\r
\r
\r
  @return EFI_SUCCESS           Stream is not an Open File\r
  @return EFI_END_OF_FILE       Tried to read past the end of the file\r
  @return EFI_INVALID_PARAMETER Stream is not an open file handle\r
  @return EFI_BUFFER_TOO_SMALL  Buffer is not big enough to do the read\r
  @return "other"               Error returned from device write\r
\r
**/\r
EFI_STATUS\r
EfiWrite (\r
  IN  EFI_OPEN_FILE  *Stream,\r
  OUT VOID           *Buffer,\r
  OUT UINTN          *BufferSize\r
  );\r
\r
/**\r
  Return the number of devices of the current type active in the system\r
\r
  @param  Type      Device type to check\r
\r
  @return 0         Invalid type\r
\r
**/\r
UINTN\r
EfiGetDeviceCounts (\r
  IN  EFI_OPEN_FILE_TYPE  Type\r
  );\r
\r
/**\r
  Set the Current Working Directory (CWD). If a call is made to EfiOpen () and\r
  the path does not contain a device name, The CWD is prepended to the path.\r
\r
  @param  Cwd     Current Working Directory to set\r
\r
\r
  @return EFI_SUCCESS           CWD is set\r
  @return EFI_INVALID_PARAMETER Cwd is not a valid device:path\r
\r
**/\r
EFI_STATUS\r
EfiSetCwd (\r
  IN  CHAR8  *Cwd\r
  );\r
\r
/**\r
  Set the Current Working Directory (CWD). If a call is made to EfiOpen () and\r
  the path does not contain a device name, The CWD is prepended to the path.\r
\r
  @param  Cwd     Current Working Directory\r
\r
\r
  @return NULL    No CWD set\r
  @return 'other' malloc'ed buffer contains CWD.\r
\r
**/\r
CHAR8 *\r
EfiGetCwd (\r
  VOID\r
  );\r
\r
#endif\r
Commit	Line	Data
	1	/** @file\r
	2	Library functions that perform file IO. Memory buffer, file system, and\r
	3	firmware volume operations are supported.\r
	4	\r
	5	Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>\r
	6	Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
	7	\r
	8	SPDX-License-Identifier: BSD-2-Clause-Patent\r
	9	\r
	10	Basic support for opening files on different device types. The device string\r
	11	is in the form of DevType:Path. Current DevType is required as there is no\r
	12	current mounted device concept of current working directory concept implement\r
	13	by this library.\r
	14	\r
	15	Device names are case insensitive and only check the leading characters for\r
	16	unique matches. Thus the following are all the same:\r
	17	LoadFile0:\r
	18	l0:\r
	19	L0:\r
	20	Lo0:\r
	21	\r
	22	Supported Device Names:\r
	23	A0x1234:0x12 - A memory buffer starting at address 0x1234 for 0x12 bytes\r
	24	l1: - EFI LoadFile device one.\r
	25	B0: - EFI BlockIo zero.\r
	26	fs3: - EFI Simple File System device 3\r
	27	Fv2: - EFI Firmware Volume device 2\r
	28	1.2.3.4:name - TFTP IP and file name\r
	29	\r
	30	**/\r
	31	\r
	32	#ifndef __EFI_FILE_LIB_H__\r
	33	#define __EFI_FILE_LIB_H__\r
	34	\r
	35	#include <PiDxe.h>\r
	36	#include <Protocol/FirmwareVolume2.h>\r
	37	#include <Protocol/FirmwareVolumeBlock.h>\r
	38	#include <Protocol/BlockIo.h>\r
	39	#include <Protocol/LoadFile.h>\r
	40	#include <Protocol/LoadFile.h>\r
	41	#include <Protocol/SimpleFileSystem.h>\r
	42	#include <Guid/FileInfo.h>\r
	43	#include <Guid/FileSystemInfo.h>\r
	44	\r
	45	#define MAX_PATHNAME 0x200\r
	46	\r
	47	/// Type of the file that has been opened\r
	48	typedef enum {\r
	49	EfiOpenLoadFile,\r
	50	EfiOpenMemoryBuffer,\r
	51	EfiOpenFirmwareVolume,\r
	52	EfiOpenFileSystem,\r
	53	EfiOpenBlockIo,\r
	54	EfiOpenTftp,\r
	55	EfiOpenMaxValue\r
	56	} EFI_OPEN_FILE_TYPE;\r
	57	\r
	58	/// Public information about the open file\r
	59	typedef struct {\r
	60	UINTN Version; // Common information\r
	61	EFI_OPEN_FILE_TYPE Type;\r
	62	EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r
	63	EFI_STATUS LastError;\r
	64	EFI_HANDLE EfiHandle;\r
	65	CHAR8 *DeviceName;\r
	66	CHAR8 *FileName;\r
	67	\r
	68	UINT64 CurrentPosition; // Information for Seek\r
	69	UINT64 MaxPosition;\r
	70	\r
	71	UINTN BaseOffset; // Base offset for hexdump command\r
	72	\r
	73	UINTN Size; // Valid for all types other than l#:\r
	74	UINT8 *Buffer; // Information valid for A#:\r
	75	\r
	76	EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv; // Information valid for Fv#:\r
	77	EFI_GUID FvNameGuid;\r
	78	EFI_SECTION_TYPE FvSectionType;\r
	79	EFI_FV_FILETYPE FvType;\r
	80	EFI_FV_FILE_ATTRIBUTES FvAttributes;\r
	81	\r
	82	EFI_PHYSICAL_ADDRESS FvStart;\r
	83	UINTN FvSize;\r
	84	UINTN FvHeaderSize;\r
	85	\r
	86	EFI_FILE *FsFileHandle; // Information valid for Fs#:\r
	87	EFI_FILE_SYSTEM_INFO *FsInfo;\r
	88	EFI_FILE_INFO *FsFileInfo;\r
	89	EFI_BLOCK_IO_MEDIA *FsBlockIoMedia; // Information valid for Fs#: or B#:\r
	90	EFI_BLOCK_IO_PROTOCOL *FsBlockIo; // Information valid for Fs#: or B#:\r
	91	\r
	92	UINTN DiskOffset; // Information valid for B#:\r
	93	\r
	94	EFI_LOAD_FILE_PROTOCOL *LoadFile; // Information valid for l#:\r
	95	\r
	96	EFI_IP_ADDRESS ServerIp; // Information valid for t:\r
	97	BOOLEAN IsDirty;\r
	98	BOOLEAN IsBufferValid;\r
	99	} EFI_OPEN_FILE;\r
	100	\r
	101	/// Type of Seek to perform\r
	102	typedef enum {\r
	103	EfiSeekStart,\r
	104	EfiSeekCurrent,\r
	105	EfiSeekEnd,\r
	106	EfiSeekMax\r
	107	} EFI_SEEK_TYPE;\r
	108	\r
	109	/**\r
	110	Open a device named by PathName. The PathName includes a device name and\r
	111	path separated by a :. See file header for more details on the PathName\r
	112	syntax. There is no checking to prevent a file from being opened more than\r
	113	one type.\r
	114	\r
	115	SectionType is only used to open an FV. Each file in an FV contains multiple\r
	116	sections and only the SectionType section is opened.\r
	117	\r
	118	For any file that is opened with EfiOpen() must be closed with EfiClose().\r
	119	\r
	120	@param PathName Path to parse to open\r
	121	@param OpenMode Same as EFI_FILE.Open()\r
	122	@param SectionType Section in FV to open.\r
	123	\r
	124	@return NULL Open failed\r
	125	@return Valid EFI_OPEN_FILE handle\r
	126	\r
	127	**/\r
	128	EFI_OPEN_FILE *\r
	129	EfiOpen (\r
	130	IN CHAR8 *PathName,\r
	131	IN CONST UINT64 OpenMode,\r
	132	IN CONST EFI_SECTION_TYPE SectionType\r
	133	);\r
	134	\r
	135	EFI_STATUS\r
	136	EfiCopyFile (\r
	137	IN CHAR8 *DestinationFile,\r
	138	IN CHAR8 *SourceFile\r
	139	);\r
	140	\r
	141	/**\r
	142	Use DeviceType and Index to form a valid PathName and try and open it.\r
	143	\r
	144	@param DeviceType Device type to open\r
	145	@param Index Device Index to use. Zero relative.\r
	146	\r
	147	@return NULL Open failed\r
	148	@return Valid EFI_OPEN_FILE handle\r
	149	\r
	150	**/\r
	151	EFI_OPEN_FILE *\r
	152	EfiDeviceOpenByType (\r
	153	IN EFI_OPEN_FILE_TYPE DeviceType,\r
	154	IN UINTN Index\r
	155	);\r
	156	\r
	157	/**\r
	158	Close a file handle opened by EfiOpen() and free all resources allocated by\r
	159	EfiOpen().\r
	160	\r
	161	@param Stream Open File Handle\r
	162	\r
	163	@return EFI_INVALID_PARAMETER Stream is not an Open File\r
	164	@return EFI_SUCCESS Steam closed\r
	165	\r
	166	**/\r
	167	EFI_STATUS\r
	168	EfiClose (\r
	169	IN EFI_OPEN_FILE *Stream\r
	170	);\r
	171	\r
	172	/**\r
	173	Return the size of the file represented by Stream. Also return the current\r
	174	Seek position. Opening a file will enable a valid file size to be returned.\r
	175	LoadFile is an exception as a load file size is set to zero.\r
	176	\r
	177	@param Stream Open File Handle\r
	178	\r
	179	@return 0 Stream is not an Open File or a valid LoadFile handle\r
	180	\r
	181	**/\r
	182	UINTN\r
	183	EfiTell (\r
	184	IN EFI_OPEN_FILE *Stream,\r
	185	OUT UINT64 *CurrentPosition OPTIONAL\r
	186	);\r
	187	\r
	188	/**\r
	189	Seek to the Offset location in the file. LoadFile and FV device types do\r
	190	not support EfiSeek(). It is not possible to grow the file size using\r
	191	EfiSeek().\r
	192	\r
	193	SeekType defines how use Offset to calculate the new file position:\r
	194	EfiSeekStart : Position = Offset\r
	195	EfiSeekCurrent: Position is Offset bytes from the current position\r
	196	EfiSeekEnd : Only supported if Offset is zero to seek to end of file.\r
	197	\r
	198	@param Stream Open File Handle\r
	199	@param Offset Offset to seek too.\r
	200	@param SeekType Type of seek to perform\r
	201	\r
	202	\r
	203	@return EFI_INVALID_PARAMETER Stream is not an Open File\r
	204	@return EFI_UNSUPPORTED LoadFile and FV does not support Seek\r
	205	@return EFI_NOT_FOUND Seek past the end of the file.\r
	206	@return EFI_SUCCESS Steam closed\r
	207	\r
	208	**/\r
	209	EFI_STATUS\r
	210	EfiSeek (\r
	211	IN EFI_OPEN_FILE *Stream,\r
	212	IN EFI_LBA Offset,\r
	213	IN EFI_SEEK_TYPE SeekType\r
	214	);\r
	215	\r
	216	/**\r
	217	Read BufferSize bytes from the current location in the file. For load file\r
	218	and FV case you must read the entire file.\r
	219	\r
	220	@param Stream Open File Handle\r
	221	@param Buffer Caller allocated buffer.\r
	222	@param BufferSize Size of buffer in bytes.\r
	223	\r
	224	\r
	225	@return EFI_SUCCESS Stream is not an Open File\r
	226	@return EFI_END_OF_FILE Tried to read past the end of the file\r
	227	@return EFI_INVALID_PARAMETER Stream is not an open file handle\r
	228	@return EFI_BUFFER_TOO_SMALL Buffer is not big enough to do the read\r
	229	@return "other" Error returned from device read\r
	230	\r
	231	**/\r
	232	EFI_STATUS\r
	233	EfiRead (\r
	234	IN EFI_OPEN_FILE *Stream,\r
	235	OUT VOID *Buffer,\r
	236	OUT UINTN *BufferSize\r
	237	);\r
	238	\r
	239	/**\r
	240	Read the entire file into a buffer. This routine allocates the buffer and\r
	241	returns it to the user full of the read data.\r
	242	\r
	243	This is very useful for load file where it's hard to know how big the buffer\r
	244	must be.\r
	245	\r
	246	@param Stream Open File Handle\r
	247	@param Buffer Pointer to buffer to return.\r
	248	@param BufferSize Pointer to Size of buffer return..\r
	249	\r
	250	\r
	251	@return EFI_SUCCESS Stream is not an Open File\r
	252	@return EFI_END_OF_FILE Tried to read past the end of the file\r
	253	@return EFI_INVALID_PARAMETER Stream is not an open file handle\r
	254	@return EFI_BUFFER_TOO_SMALL Buffer is not big enough to do the read\r
	255	@return "other" Error returned from device read\r
	256	\r
	257	**/\r
	258	EFI_STATUS\r
	259	EfiReadAllocatePool (\r
	260	IN EFI_OPEN_FILE *Stream,\r
	261	OUT VOID **Buffer,\r
	262	OUT UINTN *BufferSize\r
	263	);\r
	264	\r
	265	/**\r
	266	Write data back to the file.\r
	267	\r
	268	@param Stream Open File Handle\r
	269	@param Buffer Pointer to buffer to return.\r
	270	@param BufferSize Pointer to Size of buffer return..\r
	271	\r
	272	\r
	273	@return EFI_SUCCESS Stream is not an Open File\r
	274	@return EFI_END_OF_FILE Tried to read past the end of the file\r
	275	@return EFI_INVALID_PARAMETER Stream is not an open file handle\r
	276	@return EFI_BUFFER_TOO_SMALL Buffer is not big enough to do the read\r
	277	@return "other" Error returned from device write\r
	278	\r
	279	**/\r
	280	EFI_STATUS\r
	281	EfiWrite (\r
	282	IN EFI_OPEN_FILE *Stream,\r
	283	OUT VOID *Buffer,\r
	284	OUT UINTN *BufferSize\r
	285	);\r
	286	\r
	287	/**\r
	288	Return the number of devices of the current type active in the system\r
	289	\r
	290	@param Type Device type to check\r
	291	\r
	292	@return 0 Invalid type\r
	293	\r
	294	**/\r
	295	UINTN\r
	296	EfiGetDeviceCounts (\r
	297	IN EFI_OPEN_FILE_TYPE Type\r
	298	);\r
	299	\r
	300	/**\r
	301	Set the Current Working Directory (CWD). If a call is made to EfiOpen () and\r
	302	the path does not contain a device name, The CWD is prepended to the path.\r
	303	\r
	304	@param Cwd Current Working Directory to set\r
	305	\r
	306	\r
	307	@return EFI_SUCCESS CWD is set\r
	308	@return EFI_INVALID_PARAMETER Cwd is not a valid device:path\r
	309	\r
	310	**/\r
	311	EFI_STATUS\r
	312	EfiSetCwd (\r
	313	IN CHAR8 *Cwd\r
	314	);\r
	315	\r
	316	/**\r
	317	Set the Current Working Directory (CWD). If a call is made to EfiOpen () and\r
	318	the path does not contain a device name, The CWD is prepended to the path.\r
	319	\r
	320	@param Cwd Current Working Directory\r
	321	\r
	322	\r
	323	@return NULL No CWD set\r
	324	@return 'other' malloc'ed buffer contains CWD.\r
	325	\r
	326	**/\r
	327	CHAR8 *\r
	328	EfiGetCwd (\r
	329	VOID\r
	330	);\r
	331	\r
	332	#endif\r