diff options
Diffstat (limited to 'ShellPkg/Include/Library/FileHandleLib.h')
| -rw-r--r-- | ShellPkg/Include/Library/FileHandleLib.h | 115 |
1 files changed, 58 insertions, 57 deletions
diff --git a/ShellPkg/Include/Library/FileHandleLib.h b/ShellPkg/Include/Library/FileHandleLib.h index b265d85bb9..1a942a1ccf 100644 --- a/ShellPkg/Include/Library/FileHandleLib.h +++ b/ShellPkg/Include/Library/FileHandleLib.h @@ -1,8 +1,8 @@ /** @file
Provides interface to EFI_FILE_HANDLE functionality.
- Copyright (c) 2009, Intel Corporation<BR>
- All rights reserved. This program and the accompanying materials
+ Copyright (c) 2009-2010, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
@@ -22,13 +22,13 @@ enum { };
/**
- This function will retrieve the information about the file for the handle
+ This function will retrieve the information about the file for the handle
specified and store it in allocated pool memory.
- This function allocates a buffer to store the file's information. It is the
+ This function allocates a buffer to store the file's information. It is the
caller's responsibility to free the buffer.
- @param FileHandle The file handle of the file for which information is
+ @param FileHandle The file handle of the file for which information is
being requested.
@retval NULL information could not be retrieved.
@@ -42,15 +42,16 @@ FileHandleGetInfo ( );
/**
- This function will set the information about the file for the opened handle
+ This function will set the information about the file for the opened handle
specified.
- @param FileHandle The file handle of the file for which information
+ @param FileHandle The file handle of the file for which information
is being set.
@param FileInfo The information to set.
@retval EFI_SUCCESS The information was set.
+ @retval EFI_INVALID_PARAMETER A Parameter was out of range or invalid.
@retval EFI_UNSUPPORTED The FileHandle does not support FileInfo.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@@ -69,21 +70,21 @@ FileHandleSetInfo ( /**
This function reads information from an opened file.
- If FileHandle is not a directory, the function reads the requested number of
- bytes from the file at the file's current position and returns them in Buffer.
+ If FileHandle is not a directory, the function reads the requested number of
+ bytes from the file at the file's current position and returns them in Buffer.
If the read goes beyond the end of the file, the read length is truncated to the
- end of the file. The file's current position is increased by the number of bytes
- returned. If FileHandle is a directory, the function reads the directory entry
- at the file's current position and returns the entry in Buffer. If the Buffer
- is not large enough to hold the current directory entry, then
- EFI_BUFFER_TOO_SMALL is returned and the current file position is not updated.
- BufferSize is set to be the size of the buffer needed to read the entry. On
- success, the current position is updated to the next directory entry. If there
- are no more directory entries, the read returns a zero-length buffer.
+ end of the file. The file's current position is increased by the number of bytes
+ returned. If FileHandle is a directory, the function reads the directory entry
+ at the file's current position and returns the entry in Buffer. If the Buffer
+ is not large enough to hold the current directory entry, then
+ EFI_BUFFER_TOO_SMALL is returned and the current file position is not updated.
+ BufferSize is set to be the size of the buffer needed to read the entry. On
+ success, the current position is updated to the next directory entry. If there
+ are no more directory entries, the read returns a zero-length buffer.
EFI_FILE_INFO is the structure returned as the directory entry.
@param FileHandle The opened file handle.
- @param BufferSize On input the size of buffer in bytes. On return
+ @param BufferSize On input the size of buffer in bytes. On return
the number of bytes written.
@param Buffer The buffer to put read data into.
@@ -91,7 +92,7 @@ FileHandleSetInfo ( @retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
- @retval EFI_BUFFER_TO_SMALL Buffer is too small. ReadSize contains required
+ @retval EFI_BUFFER_TO_SMALL Buffer is too small. ReadSize contains required
size.
**/
@@ -106,11 +107,11 @@ FileHandleRead( /**
Write data to a file.
- This function writes the specified number of bytes to the file at the current
- file position. The current file position is advanced the actual number of bytes
- written, which is returned in BufferSize. Partial writes only occur when there
- has been a data error during the write attempt (such as "volume space full").
- The file is automatically grown to hold the data if required. Direct writes to
+ This function writes the specified number of bytes to the file at the current
+ file position. The current file position is advanced the actual number of bytes
+ written, which is returned in BufferSize. Partial writes only occur when there
+ has been a data error during the write attempt (such as "volume space full").
+ The file is automatically grown to hold the data if required. Direct writes to
opened directories are not supported.
@param FileHandle The opened file for writing
@@ -135,11 +136,11 @@ FileHandleWrite( IN VOID *Buffer
);
-/**
+/**
Close an open file handle.
- This function closes a specified file handle. All "dirty" cached file data is
- flushed to the device, and the file is closed. In all cases the handle is
+ This function closes a specified file handle. All "dirty" cached file data is
+ flushed to the device, and the file is closed. In all cases the handle is
closed.
@param FileHandle The file handle to close.
@@ -156,13 +157,13 @@ FileHandleClose ( Delete a file and close the handle.
This function closes and deletes a file. In all cases the file handle is closed.
- If the file cannot be deleted, the warning code EFI_WARN_DELETE_FAILURE is
+ If the file cannot be deleted, the warning code EFI_WARN_DELETE_FAILURE is
returned, but the handle is still closed.
@param FileHandle The file handle to delete.
@retval EFI_SUCCESS The file was closed sucessfully.
- @retval EFI_WARN_DELETE_FAILURE the handle was closed, but the file was not
+ @retval EFI_WARN_DELETE_FAILURE the handle was closed, but the file was not
deleted
@retval INVALID_PARAMETER One of the parameters has an invalid value.
**/
@@ -175,19 +176,19 @@ FileHandleDelete ( /**
Set the current position in a file.
- This function sets the current file position for the handle to the position
+ This function sets the current file position for the handle to the position
supplied. With the exception of seeking to position 0xFFFFFFFFFFFFFFFF, only
- absolute positioning is supported, and seeking past the end of the file is
- allowed (a subsequent write would grow the file). Seeking to position
+ absolute positioning is supported, and seeking past the end of the file is
+ allowed (a subsequent write would grow the file). Seeking to position
0xFFFFFFFFFFFFFFFF causes the current position to be set to the end of the file.
- If FileHandle is a directory, the only position that may be set is zero. This
+ If FileHandle is a directory, the only position that may be set is zero. This
has the effect of starting the read process of the directory entries over.
@param FileHandle The file handle on which the position is being set
@param Position Byte position from begining of file
@retval EFI_SUCCESS Operation completed sucessfully.
- @retval EFI_UNSUPPORTED the seek request for non-zero is not valid on
+ @retval EFI_UNSUPPORTED the seek request for non-zero is not valid on
directories.
@retval INVALID_PARAMETER One of the parameters has an invalid value.
**/
@@ -198,11 +199,11 @@ FileHandleSetPosition ( IN UINT64 Position
);
-/**
+/**
Gets a file's current position.
- This function retrieves the current file position for the file handle. For
- directories, the current file position has no meaning outside of the file
+ This function retrieves the current file position for the file handle. For
+ directories, the current file position has no meaning outside of the file
system driver and as such the operation is not supported. An error is returned
if FileHandle is a directory.
@@ -221,7 +222,7 @@ FileHandleGetPosition ( );
/**
Flushes data on a file.
-
+
This function flushes all modified data associated with a file to a device.
@param FileHandle The file handle on which to flush data.
@@ -262,8 +263,8 @@ FileHandleIsDirectory ( /**
Retrieves the first file from a directory.
- This function opens a directory and gets the first file's info in the
- directory. Caller can use FileHandleFindNextFile() to get other files. When
+ This function opens a directory and gets the first file's info in the
+ directory. Caller can use FileHandleFindNextFile() to get other files. When
complete the caller is responsible for calling FreePool() on *Buffer.
@param DirHandle The file handle of the directory to search
@@ -286,12 +287,12 @@ FileHandleFindFirstFile ( /**
Retrieves the next file in a directory.
- To use this function, caller must call the FileHandleFindFirstFile() to get the
- first file, and then use this function get other files. This function can be
- called for several times to get each file's information in the directory. If
- the call of FileHandleFindNextFile() got the last file in the directory, the next
- call of this function has no file to get. *NoFile will be set to TRUE and the
- Buffer memory will be automatically freed.
+ To use this function, caller must call the FileHandleFindFirstFile() to get the
+ first file, and then use this function get other files. This function can be
+ called for several times to get each file's information in the directory. If
+ the call of FileHandleFindNextFile() got the last file in the directory, the next
+ call of this function has no file to get. *NoFile will be set to TRUE and the
+ Buffer memory will be automatically freed.
@param DirHandle the file handle of the directory
@param Buffer pointer to buffer for file's information
@@ -316,7 +317,7 @@ FileHandleFindNextFile( If FileHandle is NULL then ASSERT()
If Size is NULL then ASSERT()
- This function extracts the file size info from the FileHandle's EFI_FILE_INFO
+ This function extracts the file size info from the FileHandle's EFI_FILE_INFO
data.
@param FileHandle The file handle from which size is retrieved.
@@ -333,11 +334,11 @@ FileHandleGetSize ( );
/**
- Function to get a full filename given a EFI_FILE_HANDLE somewhere lower on the
+ Function to get a full filename given a EFI_FILE_HANDLE somewhere lower on the
directory 'stack'.
@param[in] Handle Handle to the Directory or File to create path to.
- @param[out] FullFileName Pointer to pointer to generated full file name. It
+ @param[out] FullFileName Pointer to pointer to generated full file name. It
is the responsibility of the caller to free this memory
with a call to FreePool().
@retval EFI_SUCCESS the operation was sucessful and the FullFileName is valid.
@@ -355,23 +356,23 @@ FileHandleGetFileName ( /**
Function to read a single line (up to but not including the \n) from a file.
- If the position upon start is 0, then the Ascii Boolean will be set. This should be
+ If the position upon start is 0, then the Ascii Boolean will be set. This should be
maintained and not changed for all operations with the same file.
@param[in] Handle FileHandle to read from
@param[in,out] Buffer pointer to buffer to read into
@param[in,out] Size pointer to number of bytes in buffer
@param[in] Truncate if TRUE then allows for truncation of the line to fit.
- if FALSE will reset the position to the begining of the
+ if FALSE will reset the position to the begining of the
line if the buffer is not large enough.
- @param[in,out] Ascii Boolean value for indicating whether the file is
+ @param[in,out] Ascii Boolean value for indicating whether the file is
Ascii (TRUE) or UCS2 (FALSE);
- @retval EFI_SUCCESS the operation was sucessful. the line is stored in
+ @retval EFI_SUCCESS the operation was sucessful. the line is stored in
Buffer.
@retval EFI_INVALID_PARAMETER Handle was NULL.
@retval EFI_INVALID_PARAMETER Size was NULL.
- @retval EFI_BUFFER_TOO_SMALL Size was not enough space to store the line.
+ @retval EFI_BUFFER_TOO_SMALL Size was not enough space to store the line.
Size was updated to minimum space required.
@sa FileHandleRead
**/
@@ -386,10 +387,10 @@ FileHandleReadLine( );
/**
- Function to read a single line from a file. The \n is not included in the returned
+ Function to read a single line from a file. The \n is not included in the returned
buffer. The returned buffer must be callee freed.
- If the position upon start is 0, then the Ascii Boolean will be set. This should be
+ If the position upon start is 0, then the Ascii Boolean will be set. This should be
maintained and not changed for all operations with the same file.
@param[in] Handle FileHandle to read from.
@@ -412,7 +413,7 @@ FileHandleReturnLine( If Handle is NULL, ASSERT.
@param[in] Handle FileHandle to write to
- @param[in] Buffer Buffer to write, if NULL the function will
+ @param[in] Buffer Buffer to write, if NULL the function will
take no action and return EFI_SUCCESS.
@retval EFI_SUCCESS the data was written.
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