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system76-edk2/ShellPkg/Include/Library/ShellLib.h
jcarsey 18cefebe12 clean up comments 
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9536 6f19259b-4bc3-4df7-8a09-765794883524
2009-12-07 18:04:21 +00:00

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/** @file
Provides interface to shell functionality for shell commands and applications.
Copyright (c) 2006 - 2009, Intel Corporation<BR>
All rights reserved. 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
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#if !defined(__SHELL_LIB__)
#define __SHELL_LIB__
#include <Protocol/SimpleFileSystem.h>
#include <Protocol/EfiShell.h>
/**
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
caller's responsibility to free the buffer.
@param[in] FileHandle The file handle of the file for which information is
being requested.
@retval NULL Information could not be retrieved.
@return The information about the file.
**/
EFI_FILE_INFO*
EFIAPI
ShellGetFileInfo (
IN EFI_FILE_HANDLE FileHandle
);
/**
This function will set the information about the file for the opened handle
specified.
@param[in] FileHandle The file handle of the file for which information
is being set.
@param[in] FileInfo The infotmation to set.
@retval EFI_SUCCESS The information was set.
@retval EFI_UNSUPPORTED The InformationType is not known.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write protected.
@retval EFI_ACCESS_DENIED The file was opened read only.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
ShellSetFileInfo (
IN EFI_FILE_HANDLE FileHandle,
IN EFI_FILE_INFO *FileInfo
);
/**
This function will open a file or directory referenced by DevicePath.
This function opens a file with the open mode according to the file path. The
Attributes is valid only for EFI_FILE_MODE_CREATE.
@param[in] FilePath On input the device path to the file. On output
the remaining device path.
@param[out] DeviceHandle Pointer to the system device handle.
@param[out] FileHandle Pointer to the file handle.
@param[in] OpenMode The mode to open the file with.
@param[in] Attributes The file's file attributes.
@retval EFI_SUCCESS The information was set.
@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
device or the file system could not be found 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 no longer supported.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write protected.
@retval EFI_ACCESS_DENIED The file was opened read only.
@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
ShellOpenFileByDevicePath(
IN OUT EFI_DEVICE_PATH_PROTOCOL **FilePath,
OUT EFI_HANDLE *DeviceHandle,
OUT EFI_FILE_HANDLE *FileHandle,
IN UINT64 OpenMode,
IN UINT64 Attributes
);
/**
This function will open a file or directory referenced by filename.
If return is EFI_SUCCESS, the Filehandle is the opened file's handle;
otherwise, the Filehandle is NULL. The Attributes is valid only for
EFI_FILE_MODE_CREATE.
@param[in] FileName Pointer to file name.
@param[out] FileHandle Pointer to the file handle.
@param[in] OpenMode The mode to open the file with.
@param[in] Attributes The file's file attributes.
@retval EFI_SUCCESS The information was set.
@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
device or the file system could not be found
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 no longer supported.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write protected.
@retval EFI_ACCESS_DENIED The file was opened read only.
@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
ShellOpenFileByName(
IN CONST CHAR16 *FilePath,
OUT EFI_FILE_HANDLE *FileHandle,
IN UINT64 OpenMode,
IN UINT64 Attributes
);
/**
This function creates a directory.
If return is EFI_SUCCESS, the Filehandle is the opened directory's handle;
otherwise, the Filehandle is NULL. If the directory already existed, this
function opens the existing directory.
@param[in] DirectoryName Pointer to Directory name.
@param[out] FileHandle Pointer to the file handle.
@retval EFI_SUCCESS The information was set.
@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
device or the file system could not be found
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 no longer supported.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write protected.
@retval EFI_ACCESS_DENIED The file was opened read only.
@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
ShellCreateDirectory(
IN CONST CHAR16 *DirectoryName,
OUT EFI_FILE_HANDLE *FileHandle
);
/**
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 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.
EFI_FILE_INFO is the structure returned as the directory entry.
@param[in] FileHandle The opened file handle.
@param[in] ReadSize On input the size of buffer in bytes. On return
the number of bytes written.
@param[out] Buffer The buffer to put read data into.
@retval EFI_SUCCESS Data was read.
@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
size.
**/
EFI_STATUS
EFIAPI
ShellReadFile(
IN EFI_FILE_HANDLE FileHandle,
IN OUT UINTN *ReadSize,
OUT VOID *Buffer
);
/**
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
opened directories are not supported.
@param[in] FileHandle The opened file for writing.
@param[in] BufferSize On input the number of bytes in Buffer. On output
the number of bytes written.
@param[in] Buffer The buffer containing data to write is stored.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORTED Writes to an open directory are not supported.
@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_WRITE_PROTECTED The device is write-protected.
@retval EFI_ACCESS_DENIED The file was open for read only.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
ShellWriteFile(
IN EFI_FILE_HANDLE FileHandle,
IN OUT UINTN *BufferSize,
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
closed.
@param[in] FileHandle The file handle to close.
@retval EFI_SUCCESS The file handle was closed sucessfully.
@retval INVALID_PARAMETER One of the parameters has an invalid value.
**/
EFI_STATUS
EFIAPI
ShellCloseFile (
IN EFI_FILE_HANDLE *FileHandle
);
/**
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
returned, but the handle is still closed.
@param[in] 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
deleted.
@retval INVALID_PARAMETER One of the parameters has an invalid value.
**/
EFI_STATUS
EFIAPI
ShellDeleteFile (
IN EFI_FILE_HANDLE *FileHandle
);
/**
Set the current position in a file.
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
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
has the effect of starting the read process of the directory entries over.
@param[in] FileHandle The file handle on which the position is being set.
@param[in] 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
directories.
@retval INVALID_PARAMETER One of the parameters has an invalid value.
**/
EFI_STATUS
EFIAPI
ShellSetFilePosition (
IN EFI_FILE_HANDLE FileHandle,
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
system driver and as such the operation is not supported. An error is returned
if FileHandle is a directory.
@param[in] FileHandle The open file handle on which to get the position.
@param[out] Position Byte position from begining of file.
@retval EFI_SUCCESS The operation completed sucessfully.
@retval INVALID_PARAMETER One of the parameters has an invalid value.
@retval EFI_UNSUPPORTED The request is not valid on directories.
**/
EFI_STATUS
EFIAPI
ShellGetFilePosition (
IN EFI_FILE_HANDLE FileHandle,
OUT UINT64 *Position
);
/**
Flushes data on a file
This function flushes all modified data associated with a file to a device.
@param[in] FileHandle The file handle on which to flush data.
@retval EFI_SUCCESS The data was flushed.
@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_WRITE_PROTECTED The file or medium is write protected.
@retval EFI_ACCESS_DENIED The file was opened for read only.
**/
EFI_STATUS
EFIAPI
ShellFlushFile (
IN EFI_FILE_HANDLE FileHandle
);
/**
Retrieves the first file from a directory
This function takes an open directory handle and gets the first file
in the directory's info. Caller can use ShellFindNextFile() to get
subsequent files.
Caller must use FreePool on *Buffer opon completion of all file searching.
@param[in] DirHandle The file handle of the directory to search
@param[out] Buffer Pointer to pointer to buffer for file's information
@retval EFI_SUCCESS Found the first file.
@retval EFI_NOT_FOUND Cannot find the directory.
@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.
@return ShellReadFile
**/
EFI_STATUS
EFIAPI
ShellFindFirstFile (
IN EFI_FILE_HANDLE DirHandle,
OUT EFI_FILE_INFO **Buffer
);
/**
Retrieves the next file in a directory.
To use this function, caller must call the ShellFindFirstFile() 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 ShellFindNextFile() 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
data in Buffer is meaningless.
@param[in] DirHandle The file handle of the directory.
@param[out] Buffer Pointer to buffer for file's information.
@param[out] NoFile Pointer to boolean when last file is found.
@retval EFI_SUCCESS Found the next file.
@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
ShellFindNextFile(
IN EFI_FILE_HANDLE DirHandle,
OUT EFI_FILE_INFO *Buffer,
OUT BOOLEAN *NoFile
);
/**
Retrieve the size of a file.
This function extracts the file size info from the FileHandle's EFI_FILE_INFO
data.
@param[in] FileHandle The file handle from which size is retrieved.
@param[out] Size Pointer to size.
@retval EFI_SUCCESS The operation was completed sucessfully.
@retval EFI_DEVICE_ERROR Cannot access the file.
**/
EFI_STATUS
EFIAPI
ShellGetFileSize (
IN EFI_FILE_HANDLE FileHandle,
OUT UINT64 *Size
);
/**
Retrieves the status of the break execution flag
This function is useful to check whether the application is being asked to halt by the shell.
@retval TRUE the execution break is enabled
@retval FALSE the execution break is not enabled
**/
BOOLEAN
EFIAPI
ShellGetExecutionBreakFlag(
VOID
);
/**
Return the value of an environment variable.
This function gets the value of the environment variable set by the
ShellSetEnvironmentVariable function.
@param[in] EnvKey The key name of the environment variable.
@retval NULL The named environment variable does not exist.
@return != NULL pointer to the value of the environment variable.
**/
CONST CHAR16*
EFIAPI
ShellGetEnvironmentVariable (
IN CONST CHAR16 *EnvKey
);
/**
Set the value of an environment variable.
This function changes the current value of the specified environment variable. If the
environment variable exists and the Value is an empty string, then the environment
variable is deleted. If the environment variable exists and the Value is not an empty
string, then the value of the environment variable is changed. If the environment
variable does not exist and the Value is an empty string, there is no action. If the
environment variable does not exist and the Value is a non-empty string, then the
environment variable is created and assigned the specified value.
This is not supported pre-UEFI Shell 2.0.
@param[in] EnvKey The key name of the environment variable.
@param[in] EnvVal The Value of the environment variable
@param[in] Volatile Indicates whether the variable is non-volatile (FALSE) or volatile (TRUE).
@retval EFI_SUCCESS the operation was completed sucessfully
@retval EFI_UNSUPPORTED This operation is not allowed in pre UEFI 2.0 Shell environments
**/
EFI_STATUS
EFIAPI
ShellSetEnvironmentVariable (
IN CONST CHAR16 *EnvKey,
IN CONST CHAR16 *EnvVal,
IN BOOLEAN Volatile
);
/**
Cause the shell to parse and execute a command line.
This function creates a nested instance of the shell and executes the specified
command (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 made
by the commands executed will be reflected in the current environment. If the
Environment is non-NULL, then the changes made will be discarded.
The CommandLine is executed from the current working directory on the current
device.
EnvironmentVariables and Status are only supported for UEFI Shell 2.0 (or later).
Output is only supported for pre-UEFI Shell 2.0
@param[in] ImageHandle Parent image that is starting the operation.
@param[in] CommandLine Pointer to null terminated command line.
@param[in] Output True to display debug output. False to hide it.
@param[in] EnvironmentVariables Optional pointer to array of environment variables
in the form "x=y". If NULL current set is used.
@param[out] Status The status of the run command line.
@retval EFI_SUCCESS The operation completed sucessfully. Status
contains the status code returned.
@retval EFI_INVALID_PARAMETER A parameter contains an invalid value.
@retval EFI_OUT_OF_RESOURCES Out of resources.
@retval EFI_UNSUPPORTED The operation is not allowed.
**/
EFI_STATUS
EFIAPI
ShellExecute (
IN EFI_HANDLE *ParentHandle,
IN CHAR16 *CommandLine,
IN BOOLEAN Output,
IN CHAR16 **EnvironmentVariables,
OUT EFI_STATUS *Status
);
/**
Retreives the current directory path.
If the DeviceName is NULL, it returns the current device's current directory
name. If the DeviceName is not NULL, it returns the current directory name
on specified drive.
@param[in] DeviceName The name of the file system to get directory on.
@retval NULL The directory does not exist.
@retval != NULL The directory.
**/
CONST CHAR16*
EFIAPI
ShellGetCurrentDir (
IN CHAR16 *DeviceName OPTIONAL
);
/**
Sets (enabled or disabled) the page break mode.
When page break mode is enabled the screen will stop scrolling
and wait for operator input before scrolling a subsequent screen.
@param[in] CurrentState TRUE to enable and FALSE to disable.
**/
VOID
EFIAPI
ShellSetPageBreakMode (
IN BOOLEAN CurrentState
);
/**
Opens a group of files based on a path.
This function uses the Arg to open all the matching files. Each matched
file has a SHELL_FILE_ARG structure to record the file information. These
structures are placed on the list ListHead. Users can get the SHELL_FILE_ARG
structures from ListHead to access each file. This function supports wildcards
and will process '?' and '*' as such. The list must be freed with a call to
ShellCloseFileMetaArg().
If you are NOT appending to an existing list *ListHead must be NULL. If
*ListHead is NULL then it must be callee freed.
@param[in] Arg Pointer to path string.
@param[in] OpenMode Mode to open files with.
@param[in] ListHead Head of linked list of results.
@retval EFI_SUCCESS The operation was sucessful and the list head
contains the list of opened files.
@retval != EFI_SUCCESS The operation failed.
@sa InternalShellConvertFileListType
**/
EFI_STATUS
EFIAPI
ShellOpenFileMetaArg (
IN CHAR16 *Arg,
IN UINT64 OpenMode,
IN OUT EFI_SHELL_FILE_INFO **ListHead
);
/**
Free the linked list returned from ShellOpenFileMetaArg.
@param[in] ListHead The pointer to free.
@retval EFI_SUCCESS The operation was sucessful.
@retval EFI_INVALID_PARAMETER A parameter was invalid.
**/
EFI_STATUS
EFIAPI
ShellCloseFileMetaArg (
IN OUT EFI_SHELL_FILE_INFO **ListHead
);
/**
Find a file by searching the CWD and then the path.
If FileName is NULL, then ASSERT.
If the return value is not NULL then the memory must be caller freed.
@param[in] FileName Filename string.
@retval NULL The file was not found.
@retval !NULL The path to the file.
**/
CHAR16 *
EFIAPI
ShellFindFilePath (
IN CONST CHAR16 *FileName
);
typedef enum {
TypeFlag = 0, ///< A flag that is present or not present only (IE "-a").
TypeValue, ///< A flag that has some data following it with a space (IE "-a 1").
TypePosition, ///< Some data that did not follow a parameter (IE "filename.txt").
TypeStart, ///< A flag that has variable value appended to the end (IE "-ad", "-afd", "-adf", etc...).
TypeDoubleValue, ///< A flag that has 2 space seperated value data following it (IE "-a 1 2").
TypeMaxValue, ///< A flag followed by all the command line data before the next flag.
TypeMax,
} ParamType;
typedef struct {
CHAR16 *Name;
ParamType Type;
} SHELL_PARAM_ITEM;
/// Helper structure for no parameters (besides -? and -b)
extern SHELL_PARAM_ITEM EmptyParamList[];
/**
Checks the command line arguments passed against the list of valid ones.
Optionally removes NULL values first.
If no initialization is required, then return RETURN_SUCCESS.
@param[in] CheckList Pointer to list of parameters to check.
@param[out] CheckPackage Package of checked values.
@param[out] ProblemParam Optional pointer to pointer to unicode string for
the paramater that caused failure.
@param[in] AutoPageBreak Will automatically set PageBreakEnabled.
@param[in] AlwaysAllowNumbers Will never fail for number based flags.
@retval EFI_SUCCESS The operation completed sucessfully.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
@retval EFI_INVALID_PARAMETER A parameter was invalid.
@retval EFI_VOLUME_CORRUPTED The command line was corrupt. An argument was
duplicated. The duplicated command line argument
was returned in ProblemParam if provided.
@retval EFI_DEVICE_ERROR The commands contained 2 opposing arguments. One
of the command line arguments was returned in
ProblemParam if provided.
@retval EFI_NOT_FOUND A argument required a value that was missing.
The invalid command line argument was returned in
ProblemParam if provided.
**/
EFI_STATUS
EFIAPI
ShellCommandLineParseEx (
IN CONST SHELL_PARAM_ITEM *CheckList,
OUT LIST_ENTRY **CheckPackage,
OUT CHAR16 **ProblemParam OPTIONAL,
IN BOOLEAN AutoPageBreak,
IN BOOLEAN AlwaysAllowNumbers
);
/// Make it easy to upgrade from older versions of the shell library.
#define ShellCommandLineParse(CheckList,CheckPackage,ProblemParam,AutoPageBreak) ShellCommandLineParseEx(CheckList,CheckPackage,ProblemParam,AutoPageBreak,FALSE)
/**
Frees shell variable list that was returned from ShellCommandLineParse.
This function will free all the memory that was used for the CheckPackage
list of postprocessed shell arguments.
If CheckPackage is NULL, then return.
@param[in] CheckPackage The list to de-allocate.
**/
VOID
EFIAPI
ShellCommandLineFreeVarList (
IN LIST_ENTRY *CheckPackage
);
/**
Checks for presence of a flag parameter.
Flag arguments are in the form of "-<Key>" or "/<Key>", but do not have a value following the key.
If CheckPackage is NULL then return FALSE.
If KeyString is NULL then ASSERT().
@param[in] CheckPackage The package of parsed command line arguments.
@param[in] KeyString The Key of the command line argument to check for.
@retval TRUE The flag is on the command line.
@retval FALSE The flag is not on the command line.
**/
BOOLEAN
EFIAPI
ShellCommandLineGetFlag (
IN CONST LIST_ENTRY *CheckPackage,
IN CHAR16 *KeyString
);
/**
Returns value from command line argument.
Value parameters are in the form of "-<Key> value" or "/<Key> value".
If CheckPackage is NULL, then return NULL.
@param[in] CheckPackage The package of parsed command line arguments.
@param[in] KeyString The Key of the command line argument to check for.
@retval NULL The flag is not on the command line.
@retval !=NULL Pointer to unicode string of the value.
**/
CONST CHAR16*
EFIAPI
ShellCommandLineGetValue (
IN CONST LIST_ENTRY *CheckPackage,
IN CHAR16 *KeyString
);
/**
Returns raw value from command line argument.
Raw value parameters are in the form of "value" in a specific position in the list.
If CheckPackage is NULL, then return NULL.
@param[in] CheckPackage The package of parsed command line arguments.
@param[in] Position The position of the value.
@retval NULL The flag is not on the command line.
@retval !=NULL Pointer to unicode string of the value.
**/
CONST CHAR16*
EFIAPI
ShellCommandLineGetRawValue (
IN CONST LIST_ENTRY *CheckPackage,
IN UINT32 Position
);
/**
Returns the number of command line value parameters that were parsed.
This will not include flags.
@retval (UINTN)-1 No parsing has ocurred.
@return The number of value parameters found.
**/
UINTN
EFIAPI
ShellCommandLineGetCount(
VOID
);
/**
Determins if a parameter is duplicated.
If Param is not NULL then it will point to a callee allocated string buffer
with the parameter value if a duplicate is found.
If CheckPackage is NULL, then ASSERT.
@param[in] CheckPackage The package of parsed command line arguments.
@param[out] Param Upon finding one, a pointer to the duplicated parameter.
@retval EFI_SUCCESS No parameters were duplicated.
@retval EFI_DEVICE_ERROR A duplicate was found.
**/
EFI_STATUS
EFIAPI
ShellCommandLineCheckDuplicate (
IN CONST LIST_ENTRY *CheckPackage,
OUT CHAR16 **Param
);
/**
This function causes the shell library to initialize itself. If the shell library
is already initialized it will de-initialize all the current protocol poitners and
re-populate them again.
When the library is used with PcdShellLibAutoInitialize set to true this function
will return EFI_SUCCESS and perform no actions.
This function is intended for internal access for shell commands only.
@retval EFI_SUCCESS the initialization was complete sucessfully
**/
EFI_STATUS
EFIAPI
ShellInitialize (
VOID
);
/**
Print at a specific location on the screen.
This function will move the cursor to a given screen location and print the specified string.
If -1 is specified for either the Row or Col the current screen location for BOTH
will be used.
If either Row or Col is out of range for the current console, then ASSERT.
If Format is NULL, then ASSERT.
In addition to the standard %-based flags as supported by UefiLib Print() this supports
the following additional flags:
%N - Set output attribute to normal
%H - Set output attribute to highlight
%E - Set output attribute to error
%B - Set output attribute to blue color
%V - Set output attribute to green color
Note: The background color is controlled by the shell command cls.
@param[in] Row The row to print at.
@param[in] Col The column to print at.
@param[in] Format The format string.
@return The number of characters printed to the screen.
**/
UINTN
EFIAPI
ShellPrintEx(
IN INT32 Col OPTIONAL,
IN INT32 Row OPTIONAL,
IN CONST CHAR16 *Format,
...
);
/**
Print at a specific location on the screen.
This function will move the cursor to a given screen location and print the specified string.
If -1 is specified for either the Row or Col the current screen location for BOTH
will be used.
If either Row or Col is out of range for the current console, then ASSERT.
If Format is NULL, then ASSERT.
In addition to the standard %-based flags as supported by UefiLib Print() this supports
the following additional flags:
%N - Set output attribute to normal.
%H - Set output attribute to highlight.
%E - Set output attribute to error.
%B - Set output attribute to blue color.
%V - Set output attribute to green color.
Note: The background color is controlled by the shell command cls.
@param[in] Row The row to print at.
@param[in] Col The column to print at.
@param[in] HiiFormatStringId The format string Id for getting from Hii.
@param[in] HiiFormatHandle The format string Handle for getting from Hii.
@return the number of characters printed to the screen.
**/
UINTN
EFIAPI
ShellPrintHiiEx(
IN INT32 Col OPTIONAL,
IN INT32 Row OPTIONAL,
IN CONST EFI_STRING_ID HiiFormatStringId,
IN CONST EFI_HANDLE HiiFormatHandle,
...
);
/**
Function to determine if a given filename represents a directory.
If DirName is NULL, then ASSERT.
@param[in] DirName Path to directory to test.
@retval EFI_SUCCESS The Path represents a directory.
@retval EFI_NOT_FOUND The Path does not represent a directory.
@retval other The path failed to open.
**/
EFI_STATUS
EFIAPI
ShellIsDirectory(
IN CONST CHAR16 *DirName
);
/**
Function to determine if a given filename represents a file.
If Name is NULL, then ASSERT.
@param[in] Name Path to file to test.
@retval EFI_SUCCESS The Path represents a file.
@retval EFI_NOT_FOUND The Path does not represent a file.
@retval other The path failed to open.
**/
EFI_STATUS
EFIAPI
ShellIsFile(
IN CONST CHAR16 *Name
);
/**
Function to determine whether a string is decimal or hex representation of a number
and return the number converted from the string.
@param[in] String String representation of a number
@return The unsigned integer result of the conversion.
**/
UINTN
EFIAPI
ShellStrToUintn(
IN CONST CHAR16 *String
);
/**
Safely append with automatic string resizing given length of Destination and
desired length of copy from Source.
Append the first D characters of Source to the end of Destination, where D is
the lesser of Count and the StrLen() of Source. If appending those D characters
will fit within Destination (whose Size is given as CurrentSize) and
still leave room for a null terminator, then those characters are appended,
starting at the original terminating null of Destination, and a new terminating
null is appended.
If appending D characters onto Destination will result in a overflow of the size
given in CurrentSize the string will be grown such that the copy can be performed
and CurrentSize will be updated to the new size.
If Source is NULL, there is nothing to append, just return the current buffer in
Destination.
If Destination is NULL, then ASSERT().
If Destination's current length (including NULL terminator) is already more than
CurrentSize, then ASSERT().
@param[in,out] Destination The String to append onto.
@param[in,out] CurrentSize On call the number of bytes in Destination. On
return possibly the new size (still in bytes). If NULL
then allocate whatever is needed.
@param[in] Source The String to append from.
@param[in] Count Maximum number of characters to append. If 0 then
all are appended.
@return The Destination after apending the Source.
**/
CHAR16*
EFIAPI
StrnCatGrow (
IN OUT CHAR16 **Destination,
IN OUT UINTN *CurrentSize,
IN CONST CHAR16 *Source,
IN UINTN Count
);
#endif // __SHELL_LIB__
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