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udk2010.up2.shell initial release.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10874 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jcarsey
2010-09-14 05:18:09 +00:00
parent 52fb4d3d13
commit a405b86d27
102 changed files with 30419 additions and 1040 deletions
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256
ShellPkg/Include/Protocol/EfiShellEnvironment2.h
View File

@ -13,7 +13,7 @@
**/
#if !defined (_SHELL_ENVIRONMENT_2_PROTOCOL_H_)
#ifndef _SHELL_ENVIRONMENT_2_PROTOCOL_H_
#define _SHELL_ENVIRONMENT_2_PROTOCOL_H_
#define DEFAULT_INIT_ROW 1
@ -24,8 +24,8 @@
to a given location. The location is dependant on the implementation. This is
used when programatically adding shell commands.
@param Handle The handle the protocol is on.
@param Interface The interface to the protocol.
@param[in] Handle The handle the protocol is on.
@param[in] Interface The interface to the protocol.
**/
typedef
@ -40,11 +40,11 @@ VOID
implementation. The specific command depends on the implementation. This is
used when programatically adding shell commands.
@param ImageHandle The handle to the binary shell.
@param SystemTable Pointer to the system table.
@param[in] ImageHandle The handle to the binary shell.
@param[in] SystemTable The pointer to the system table.
@retval EFI_SUCCESS The command ran to completion
@retval other An error ocurred. Any error is possible
@retval EFI_SUCCESS The command completed.
@retval other An error occurred. Any error is possible
depending on the implementation of the shell
command.
@ -61,7 +61,7 @@ EFI_STATUS
This is used when programatically adding shell commands. Upon successful return
the memory allocated is up to the caller to free.
@param Str Pointer to pointer to string to display for help.
@param[in,out] Str Pointer to pointer to string to display for help.
@retval EFI_SUCCESS The help string is in the parameter Str.
@ -111,8 +111,8 @@ GUID for the shell environment2 extension (main GUID above).
0xd2c18636, 0x40e5, 0x4eb5, {0xa3, 0x1b, 0x36, 0x69, 0x5f, 0xd4, 0x2c, 0x87} \
}
#define EFI_SHELL_MAJOR_VER 0x00000001 ///< Major version of the EFI_SHELL_ENVIRONMENT2
#define EFI_SHELL_MINOR_VER 0x00000000 ///< Minor version of the EFI_SHELL_ENVIRONMENT2
#define EFI_SHELL_MAJOR_VER 0x00000001 ///< Major version of the EFI_SHELL_ENVIRONMENT2.
#define EFI_SHELL_MINOR_VER 0x00000000 ///< Minor version of the EFI_SHELL_ENVIRONMENT2.
/**
Execute a command line.
@ -121,13 +121,13 @@ GUID for the shell environment2 extension (main GUID above).
parsing any requires scripts, and if DebugOutput is TRUE printing errors
encountered directly to the screen.
@param ParentImageHandle Handle of image executing this operation.
@param CommandLine The string command line to execute.
@param DebugOutput TRUE indicates that errors should be printed directly.
@param[in] ParentImageHandle Handle of the image executing this operation.
@param[in] CommandLine The string command line to execute.
@param[in] DebugOutput TRUE indicates that errors should be printed directly.
FALSE supresses error messages.
@retval EFI_SUCCESS The command line executed and completed.
@retval EFI_ABORTED The operation did not complete due to abort.
@retval EFI_ABORTED The operation aborted.
@retval EFI_INVALID_PARAMETER A parameter did not have a valid value.
@retval EFI_OUT_OF_RESOURCES A required memory allocation failed.
@ -144,7 +144,7 @@ EFI_STATUS
/**
This function returns a shell environment variable value.
@param Name Pointer to the string with the shell environment
@param[in] Name The pointer to the string with the shell environment
variable name.
@retval NULL The shell environment variable's value could not be found.
@ -160,7 +160,7 @@ CHAR16 *
/**
This function returns a shell environment map value.
@param Name Pointer to the string with the shell environment
@param[in] Name The pointer to the string with the shell environment
map name.
@retval NULL The shell environment map's value could not be found.
@ -179,9 +179,9 @@ CHAR16 *
This will allocate all required memory, put the new command on the command
list in the correct location.
@param Handler The handler function to call when the command gets called.
@param Cmd The command name.
@param GetLineHelp Function to call of get help for this command.
@param[in] Handler The handler function to call when the command gets called.
@param[in] Cmd The command name.
@param[in] GetLineHelp The function to call of type "get help" for this command.
@retval EFI_SUCCESS The command is now part of the command list.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
@ -203,12 +203,12 @@ EFI_STATUS
This will get the current protocol info and add the new info or update existing info
and then resave the info.
@param Protocol Pointer to the protocol's GUID.
@param DumpToken The function pointer to dump token function or
@param[in] Protocol The pointer to the protocol's GUID.
@param[in] DumpToken The function pointer to dump token function or
NULL.
@param DumpInfo The function pointer to dump infomation function
@param[in] DumpInfo The function pointer to dump infomation function
or NULL.
@param IdString The english name of the protocol.
@param[in] IdString The English name of the protocol.
**/
typedef
VOID
@ -226,11 +226,11 @@ VOID
found it will return the name of that protocol. If no name is found and
GenId is TRUE it will generate ths string.
@param Protocol The GUID of the protocol to look for.
@param GenId Whether to generate a name string if its not found.
@param[in] Protocol The GUID of the protocol to look for.
@param[in] GenId Whether to generate a name string if it is not found.
@return !NULL The Name of the protocol.
@retval NULL The Name was not found and GenId was not TRUE.
@return !NULL The Name of the protocol.
@retval NULL The Name was not found, and GenId was not TRUE.
**/
typedef
CHAR16*
@ -246,10 +246,10 @@ CHAR16*
If DeviceName is specified, then return the current shell directory on that
device. If DeviceName is NULL, then return the current directory on the
current device. The caller us responsible to free the returned string when
no londer required.
no longer required.
@param DeviceName The name of the device to get the current
directory on or NULL for current device.
@param[in] DeviceName The name of the device to get the current
directory on, or NULL for current device.
@return String array with the current directory on the current or specified device.
@ -270,11 +270,11 @@ CHAR16*
The memory allocated by the callee for this list is freed by making a call to
SHELLENV_FREE_FILE_LIST.
@param Arg Pointer Path to files to open.
@param ListHead Pointer to allocated and initialized list head
upon which to append all the opened file structures.
@param[in] Arg The pointer Path to files to open.
@param[in,out] ListHead The pointer to the allocated and initialized list head
upon which to append all opened file structures.
@retval EFI_SUCCESS 1 or more files was opened and a struct of each file's
@retval EFI_SUCCESS One or more files was opened and a struct of each file's
information was appended to ListHead.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
@retval EFI_NOT_FOUND No matching files could be found.
@ -289,9 +289,9 @@ EFI_STATUS
/**
This frees all of the nodes under the ListHead, but not ListHead itself.
@param ListHead Pointer to list to free all nodes of.
@param[in,out] ListHead Pointer to list to free all nodes of.
@retval EFI_SUCCESS Always returned.
@retval EFI_SUCCESS This function always returns EFI_SUCCESS.
**/
typedef
EFI_STATUS
@ -307,10 +307,10 @@ EFI_STATUS
EFI_SHELL_INTERFACE protocol. It is the caller's responsibility to free the
memory.
@param ImageHandle The handle which will use the new ShellInterface
@param[in] ImageHandle The handle which will use the new ShellInterface
protocol.
@return the newly allocated shell interface protocol.
@return The newly allocated shell interface protocol.
**/
typedef
@ -332,12 +332,12 @@ EFI_SHELL_INTERFACE*
typedef
BOOLEAN
(EFIAPI *SHELLENV_BATCH_IS_ACTIVE) (
IN VOID
VOID
);
/**
This is an internal shell function to free any and all allocated resources.
This should be called just closing the shell.
This should be called immediately prior to closing the shell.
**/
typedef
VOID
@ -349,12 +349,12 @@ VOID
This function enables the page break mode.
This mode causes the output to pause after each complete screen to enable a
user to more easily read it. If AutoWrap is TRUE then rows with too many
characters will be chopped and divided into 2 rows. If FALSE then rows with
user to more easily read it. If AutoWrap is TRUE, then rows with too many
characters will be chopped and divided into 2 rows. If FALSE, then rows with
too many characters may not be fully visible to the user on the screen.
@param StartRow The row number to start this on.
@param AutoWrap Whether to auto wrap rows that are too long.
@param[in] StartRow The row number to start this on.
@param[in] AutoWrap Whether to auto wrap rows that are too long.
**/
typedef
VOID
@ -366,13 +366,13 @@ VOID
/**
This function disables the page break mode.
Tisabling this causes the output to print out exactly as coded with no breaks
Disabling this causes the output to print out exactly as coded, with no breaks
for readability.
**/
typedef
VOID
(EFIAPI *SHELLENV_DISABLE_PAGE_BREAK) (
IN VOID
VOID
);
/**
@ -384,7 +384,7 @@ VOID
typedef
BOOLEAN
(EFIAPI *SHELLENV_GET_PAGE_BREAK) (
IN VOID
VOID
);
/**
@ -395,7 +395,7 @@ BOOLEAN
#define EFI_OUTPUT_PAUSE 0x00000002
#define EFI_EXECUTION_BREAK 0x00000004
@param KeyFilter The new key filter to use.
@param[in] KeyFilter The new key filter to use.
**/
typedef
VOID
@ -411,12 +411,12 @@ VOID
#define EFI_OUTPUT_PAUSE 0x00000002
#define EFI_EXECUTION_BREAK 0x00000004
@retval the current filter mask.
@retval The current filter mask.
**/
typedef
UINT32
(EFIAPI *SHELLENV_GET_KEY_FILTER) (
IN VOID
VOID
);
/**
@ -425,33 +425,33 @@ UINT32
This is used to inform a shell application that a break condition has been
initiated. Long loops should check this to prevent delays to the break.
@retval TRUE A break has been signaled. the application
@retval TRUE A break has been signaled. The application
should exit with EFI_ABORTED as soon as possible.
@retval FALSE Continue as normal.
**/
typedef
BOOLEAN
(EFIAPI *SHELLENV_GET_EXECUTION_BREAK) (
IN VOID
VOID
);
/**
This is an internal-shell function used to increment the shell nesting level.
This is an internal shell function used to increment the shell nesting level.
**/
typedef
VOID
(EFIAPI *SHELLENV_INCREMENT_SHELL_NESTING_LEVEL) (
IN VOID
VOID
);
/**
This is an internal-shell function used to decrement the shell nesting level.
This is an internal shell function used to decrement the shell nesting level.
**/
typedef
VOID
(EFIAPI *SHELLENV_DECREMENT_SHELL_NESTING_LEVEL) (
IN VOID
VOID
);
/**
@ -464,7 +464,7 @@ VOID
typedef
BOOLEAN
(EFIAPI *SHELLENV_IS_ROOT_SHELL) (
IN VOID
VOID
);
/**
@ -473,11 +473,11 @@ BOOLEAN
This is an internal shell function to handle shell cascading. It restores the
original set of console protocols.
@param ConInHandle The handle of ConIn.
@param ConIn Pointer to the location to return the pointer to
@param[in] ConInHandle The handle of ConIn.
@param[in,out] ConIn The pointer to the location to return the pointer to
the original console input.
@param ConOutHandle The handle of ConOut
@param ConOut Pointer to the location to return the pointer to
@param[in] ConOutHandle The handle of ConOut
@param[in,out] ConOut The pointer to the location to return the pointer to
the original console output.
**/
typedef
@ -507,12 +507,12 @@ VOID
This is an internal shell function to enumerate the handle database.
This function gets the next handle in the handle database. If no handles are
found EFI_NOT_FOUND is returned. If the previous Handle was the last handle
found, EFI_NOT_FOUND is returned. If the previous Handle was the last handle,
it is set to NULL before returning.
This must be called after INIT_HANDLE_ENUMERATOR and before CLOSE_HANDLE_ENUMERATOR.
@param Handle Pointer to pointer to Handle. Will be set
@param[in,out] Handle The pointer to pointer to Handle. It is set
on a sucessful return.
@retval EFI_SUCCESS The next handle in the handle database is *Handle.
@ -533,10 +533,10 @@ EFI_STATUS
This must be called after INIT_HANDLE_ENUMERATOR and before CLOSE_HANDLE_ENUMERATOR.
@param SkipNum how many handles to skip
@param[in] SkipNum How many handles to skip
@retval EFI_SUCCESS the next handle in the handle database is *Handle
@retval EFI_ACCESS_DENIED there are not SkipNum handles left in the database
@retval EFI_SUCCESS The next handle in the handle database is *Handle
@retval EFI_ACCESS_DENIED There are not SkipNum handles left in the database
**/
typedef
EFI_STATUS
@ -552,9 +552,9 @@ EFI_STATUS
This must be called after INIT_HANDLE_ENUMERATOR and before CLOSE_HANDLE_ENUMERATOR.
@param EnumIndex Where to start.
@param[in] EnumIndex Where to start.
@return the number of handles either read out or skipped before this reset.
@return The number of handles either read out or skipped before this reset.
**/
typedef
UINTN
@ -568,7 +568,7 @@ UINTN
This must be called after INIT_HANDLE_ENUMERATOR.
This function releases all memory and resources associated with the handle database.
Tfter this no other handle enumerator functions except INIT_HANDLE_ENUMERATOR will
After this no other handle enumerator functions except INIT_HANDLE_ENUMERATOR will
function properly.
**/
typedef
@ -584,7 +584,7 @@ VOID
This must be called after INIT_HANDLE_ENUMERATOR and before CLOSE_HANDLE_ENUMERATOR.
@return the number of handles in the handle database.
@return The number of handles in the handle database.
**/
typedef
UINTN
@ -596,12 +596,12 @@ UINTN
Handle Enumerator structure.
**/
typedef struct {
INIT_HANDLE_ENUMERATOR Init; ///< Pointer to INIT_HANDLE_ENUMERATOR function.
NEXT_HANDLE Next; ///< Pointer to NEXT_HANDLE function.
SKIP_HANDLE Skip; ///< Pointer to SKIP_HANDLE function.
RESET_HANDLE_ENUMERATOR Reset; ///< Pointer to RESET_HANDLE_ENUMERATOR function.
CLOSE_HANDLE_ENUMERATOR Close; ///< Pointer to CLOSE_HANDLE_ENUMERATOR function.
GET_NUM GetNum; ///< Pointer to GET_NUM function.
INIT_HANDLE_ENUMERATOR Init; ///< The pointer to INIT_HANDLE_ENUMERATOR function.
NEXT_HANDLE Next; ///< The pointer to NEXT_HANDLE function.
SKIP_HANDLE Skip; ///< The pointer to SKIP_HANDLE function.
RESET_HANDLE_ENUMERATOR Reset; ///< The pointer to RESET_HANDLE_ENUMERATOR function.
CLOSE_HANDLE_ENUMERATOR Close; ///< The pointer to CLOSE_HANDLE_ENUMERATOR function.
GET_NUM GetNum; ///< The pointer to GET_NUM function.
} HANDLE_ENUMERATOR;
/**
@ -614,18 +614,18 @@ typedef struct {
**/
typedef struct {
UINTN Signature; ///< PROTOCOL_INFO_SIGNATURE.
LIST_ENTRY Link; ///< Standard lined list helper member.
LIST_ENTRY Link; ///< Standard linked list helper member.
//
// The parsing info for the protocol.
//
EFI_GUID ProtocolId; ///< GUID for the protocol.
CHAR16 *IdString; ///< Name of the protocol.
SHELLENV_DUMP_PROTOCOL_INFO DumpToken; ///< Pointer to DumpToken function for the protocol.
SHELLENV_DUMP_PROTOCOL_INFO DumpInfo; ///< Pointer to DumpInfo function for the protocol.
EFI_GUID ProtocolId; ///< The GUID for the protocol.
CHAR16 *IdString; ///< The name of the protocol.
SHELLENV_DUMP_PROTOCOL_INFO DumpToken; ///< The pointer to DumpToken function for the protocol.
SHELLENV_DUMP_PROTOCOL_INFO DumpInfo; ///< The pointer to DumpInfo function for the protocol.
//
// Patabase info on which handles are supporting this protocol.
//
UINTN NoHandles; ///< How many handles produce this protocol.
UINTN NoHandles; ///< The number of handles producing this protocol.
EFI_HANDLE *Handles; ///< The array of handles.
} PROTOCOL_INFO;
@ -649,14 +649,14 @@ VOID
/**
This function is an internal shell function for enumeration of protocols.
This functiol will return the next protocol in the list. If this is called
immediately after initialization it will return the first. If this is called
immediately after reset it will return the protocol first again.
This function returns the next protocol on the list. If this is called
immediately after initialization, it will return the first protocol on the list.
If this is called immediately after reset, it will return the first protocol again.
This cannot be called after CLOSE_PROTOCOL_INFO_ENUMERATOR, but it must be
called after INIT_PROTOCOL_INFO_ENUMERATOR.
@param ProtocolInfo Pointer to pointer to protocol information structure.
@param[in,out] ProtocolInfo The pointer to pointer to protocol information structure.
@retval EFI_SUCCESS The next protocol's information was sucessfully returned.
@retval NULL There are no more protocols.
@ -675,7 +675,7 @@ EFI_STATUS
This function does nothing and always returns EFI_SUCCESS.
@retval EFI_SUCCESS always returned (see above).
@retval EFI_SUCCESS Always returned (see above).
**/
typedef
EFI_STATUS
@ -718,11 +718,11 @@ VOID
Protocol enumerator structure of function pointers.
**/
typedef struct {
INIT_PROTOCOL_INFO_ENUMERATOR Init; ///< Pointer to INIT_PROTOCOL_INFO_ENUMERATOR function.
NEXT_PROTOCOL_INFO Next; ///< Pointer to NEXT_PROTOCOL_INFO function.
SKIP_PROTOCOL_INFO Skip; ///< Pointer to SKIP_PROTOCOL_INFO function.
RESET_PROTOCOL_INFO_ENUMERATOR Reset; ///< Pointer to RESET_PROTOCOL_INFO_ENUMERATOR function.
CLOSE_PROTOCOL_INFO_ENUMERATOR Close; ///< Pointer to CLOSE_PROTOCOL_INFO_ENUMERATOR function.
INIT_PROTOCOL_INFO_ENUMERATOR Init; ///< The pointer to INIT_PROTOCOL_INFO_ENUMERATOR function.
NEXT_PROTOCOL_INFO Next; ///< The pointer to NEXT_PROTOCOL_INFO function.
SKIP_PROTOCOL_INFO Skip; ///< The pointer to SKIP_PROTOCOL_INFO function.
RESET_PROTOCOL_INFO_ENUMERATOR Reset; ///< The pointer to RESET_PROTOCOL_INFO_ENUMERATOR function.
CLOSE_PROTOCOL_INFO_ENUMERATOR Close; ///< The pointer to CLOSE_PROTOCOL_INFO_ENUMERATOR function.
} PROTOCOL_INFO_ENUMERATOR;
/**
@ -742,42 +742,42 @@ typedef struct {
whether the handle in question produced either EFI_DRIVER_DIAGNOSTICS_PROTOCOL or
EFI_DRIVER_DIAGNOSTICS2_PROTOCOL.
Upon sucessful return the memory for *BestDeviceName is up to the caller to free.
Upon successful return, the memory for *BestDeviceName is up to the caller to free.
@param DeviceHandle The device handle whose name is desired.
@param UseComponentName Whether to use the ComponentName protocol at all.
@param UseDevicePath Whether to use the DevicePath protocol at all.
@param Language Pointer to language string to use.
@param BestDeviceName Pointer to pointer to string allocated with the name.
@param ConfigurationStatus Pointer to status for opening a Configuration protocol.
@param DiagnosticsStatus Pointer to status for opening a Diagnostics protocol.
@param Display Whether to Print this out to default Print location.
@param Indent How many characters to indent the printing.
@param[in] DeviceHandle The device handle whose name is desired.
@param[in] UseComponentName Whether to use the ComponentName protocol at all.
@param[in] UseDevicePath Whether to use the DevicePath protocol at all.
@param[in] Language The pointer to the language string to use.
@param[in,out] BestDeviceName The pointer to pointer to string allocated with the name.
@param[out] ConfigurationStatus The pointer to status for opening a Configuration protocol.
@param[out] DiagnosticsStatus The pointer to status for opening a Diagnostics protocol.
@param[in] Display Whether to Print this out to default Print location.
@param[in] Indent How many characters to indent the printing.
@retval EFI_SUCCESS This function always returns EFI_SUCCESS.
**/
typedef
EFI_STATUS
(EFIAPI *GET_DEVICE_NAME) (
EFI_HANDLE DeviceHandle,
BOOLEAN UseComponentName,
BOOLEAN UseDevicePath,
CHAR8 *Language,
CHAR16 **BestDeviceName,
EFI_STATUS *ConfigurationStatus,
EFI_STATUS *DiagnosticsStatus,
BOOLEAN Display,
UINTN Indent
IN EFI_HANDLE DeviceHandle,
IN BOOLEAN UseComponentName,
IN BOOLEAN UseDevicePath,
IN CHAR8 *Language,
IN OUT CHAR16 **BestDeviceName,
OUT EFI_STATUS *ConfigurationStatus,
OUT EFI_STATUS *DiagnosticsStatus,
IN BOOLEAN Display,
IN UINTN Indent
);
#define EFI_SHELL_COMPATIBLE_MODE_VER L"1.1.1" ///< string for lowest version this shell supports
#define EFI_SHELL_ENHANCED_MODE_VER L"1.1.2" ///< string for highest version this shell supports
#define EFI_SHELL_COMPATIBLE_MODE_VER L"1.1.1" ///< The string for lowest version this shell supports.
#define EFI_SHELL_ENHANCED_MODE_VER L"1.1.2" ///< The string for highest version this shell supports.
/**
This function gets the shell mode as stored in the shell environment
"efishellmode". It will not fail.
@param Mode Returns a string representing one of the
@param[out] Mode Returns a string representing one of the
2 supported modes of the shell.
@retval EFI_SUCCESS This function always returns success.
@ -798,6 +798,8 @@ EFI_STATUS
If anything prevents the complete conversion free any allocated memory and
return NULL.
@param[in] Path The path to convert.
@retval !NULL A pointer to the callee allocated Device Path.
@retval NULL The operation could not be completed.
**/
@ -820,9 +822,9 @@ EFI_DEVICE_PATH_PROTOCOL*
This function will use the internal lock to prevent changes to the map during
the lookup operation.
@param DevPath The device path to search for a name for.
@param ConsistMapping What state to verify map flag VAR_ID_CONSIST.
@param Name On sucessful return the name of that device path.
@param[in] DevPath The device path to search for a name for.
@param[in] ConsistMapping What state to verify map flag VAR_ID_CONSIST.
@param[out] Name On sucessful return the name of that device path.
@retval EFI_SUCCESS The DevPath was found and the name returned
in Name.
@ -847,11 +849,11 @@ EFI_STATUS
The memory allocated by the callee for this list is freed by making a call to
SHELLENV_FREE_FILE_LIST.
@param Arg Pointer Path to files to open.
@param ListHead Pointer to allocated and initialized list head
@param[in] Arg The pointer to the path of the files to be opened.
@param[in,out] ListHead The pointer to allocated and initialized list head
upon which to append all the opened file structures.
@retval EFI_SUCCESS 1 or more files was opened and a struct of each file's
@retval EFI_SUCCESS One or more files was opened and a struct of each file's
information was appended to ListHead.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
@retval EFI_NOT_FOUND No matching files could be found.
@ -872,7 +874,7 @@ EFI_STATUS
files in the list of returned files. Any file listed twice will have one of its
instances removed.
@param ListHead Pointer to linked list head that was returned from
@param[in] ListHead The pointer to linked list head that was returned from
SHELLENV_FILE_META_ARG_NO_WILDCARD or
SHELLENV_FILE_META_ARG.
@ -888,22 +890,22 @@ EFI_STATUS
/**
Converts a File System map name to a device path.
if DevPath is NULL, then ASSERT().
If DevPath is NULL, then ASSERT().
This function looks through the shell environment map for a map whose Name
matches the Name parameter. If one is found the device path pointer is
matches the Name parameter. If one is found, the device path pointer is
updated to point to that file systems device path. The caller should not
free the memory from that device path.
This function will use the internal lock to prevent changes to the map during
the lookup operation.
@param Name Pointer to NULL terminated UNICODE string of the
@param[in] Name The pointer to the NULL terminated UNICODE string of the
file system name.
@param DevPath Pointer to pointer to DevicePath. only valid on
OUT if sucessful.
@param[out] DevPath The pointer to pointer to DevicePath. Only valid on
successful return.
@retval EFI_SUCCESS The conversion was successful and the device
@retval EFI_SUCCESS The conversion was successful, and the device
path was returned.
@retval EFI_NOT_FOUND The file system could not be found in the map.
**/