#include "Shell.h"

Functions
CONST CHAR16 *	FindEndOfParameter (IN CONST CHAR16 *String)

EFI_STATUS	GetNextParameter (IN OUT CHAR16 Walker, IN OUT CHAR16 TempParameter, IN CONST UINTN Length, IN BOOLEAN StripQuotation)

EFI_STATUS	ParseCommandLineToArgs (IN CONST CHAR16 CommandLine, IN BOOLEAN StripQuotation, IN OUT CHAR16 *Argv, IN OUT UINTN Argc)

EFI_STATUS	CreatePopulateInstallShellParametersProtocol (IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *NewShellParameters, IN OUT BOOLEAN RootShellInstance)

EFI_STATUS	CleanUpShellParametersProtocol (IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *NewShellParameters)

EFI_STATUS	IsUnicodeFile (IN CONST CHAR16 *FileName)

VOID	StripQuotes (IN OUT CHAR16 *TheString)

VOID	CalculateEfiHdrCrc (IN OUT EFI_TABLE_HEADER *Hdr)

CHAR16 *	FixFileName (IN CHAR16 *FileName)

CHAR16 *	FixVarName (IN CHAR16 *FileName)

EFI_STATUS	WriteFileTag (IN SHELL_FILE_HANDLE FileHandle)

EFI_STATUS	UpdateStdInStdOutStdErr (IN OUT EFI_SHELL_PARAMETERS_PROTOCOL ShellParameters, IN CHAR16 NewCommandLine, OUT SHELL_FILE_HANDLE OldStdIn, OUT SHELL_FILE_HANDLE OldStdOut, OUT SHELL_FILE_HANDLE OldStdErr, OUT SYSTEM_TABLE_INFO SystemTableInfo)

EFI_STATUS	RestoreStdInStdOutStdErr (IN OUT EFI_SHELL_PARAMETERS_PROTOCOL ShellParameters, IN SHELL_FILE_HANDLE OldStdIn, IN SHELL_FILE_HANDLE OldStdOut, IN SHELL_FILE_HANDLE OldStdErr, IN SYSTEM_TABLE_INFO *SystemTableInfo)

EFI_STATUS	UpdateArgcArgv (IN OUT EFI_SHELL_PARAMETERS_PROTOCOL ShellParameters, IN CONST CHAR16 NewCommandLine, IN SHELL_OPERATION_TYPES Type, OUT CHAR16 **OldArgv OPTIONAL, OUT UINTN OldArgc OPTIONAL)

VOID	RestoreArgcArgv (IN OUT EFI_SHELL_PARAMETERS_PROTOCOL ShellParameters, IN CHAR16 *OldArgv, IN UINTN OldArgc)

Variables
BOOLEAN	AsciiRedirection = FALSE

Detailed Description

Member functions of EFI_SHELL_PARAMETERS_PROTOCOL and functions for creation, manipulation, and initialization of EFI_SHELL_PARAMETERS_PROTOCOL.

(C) Copyright 2016 Hewlett Packard Enterprise Development LP
Copyright (C) 2014, Red Hat, Inc. (C) Copyright 2013 Hewlett-Packard Development Company, L.P.
Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file ShellParametersProtocol.c.

Function Documentation

◆ CalculateEfiHdrCrc()

VOID CalculateEfiHdrCrc ( IN OUT EFI_TABLE_HEADER * Hdr )

Calculate the 32-bit CRC in a EFI table using the service provided by the gRuntime service.

Parameters

Hdr	Pointer to an EFI standard header

Definition at line 564 of file ShellParametersProtocol.c.

◆ CleanUpShellParametersProtocol()

EFI_STATUS CleanUpShellParametersProtocol ( IN OUT EFI_SHELL_PARAMETERS_PROTOCOL * NewShellParameters )

frees all memory used by creation and installation of shell parameters protocol and if there was an old version installed it will restore that one.

Parameters

NewShellParameters the interface of EFI_SHELL_PARAMETERS_PROTOCOL that is being cleaned up.

Return values

EFI_SUCCESS the cleanup was successful

Returns: other the cleanup failed

See also: ReinstallProtocolInterface; UninstallProtocolInterface

Definition at line 447 of file ShellParametersProtocol.c.

◆ CreatePopulateInstallShellParametersProtocol()

EFI_STATUS CreatePopulateInstallShellParametersProtocol	(	IN OUT EFI_SHELL_PARAMETERS_PROTOCOL **	NewShellParameters,
		IN OUT BOOLEAN *	RootShellInstance
	)

creates a new EFI_SHELL_PARAMETERS_PROTOCOL instance and populates it and then installs it on our handle and if there is an existing version of the protocol that one is cached for removal later.

Parameters

[in,out]	NewShellParameters	on a successful return, a pointer to pointer to the newly installed interface.
[in,out]	RootShellInstance	on a successful return, pointer to boolean. TRUE if this is the root shell instance.

Return values

EFI_SUCCESS the operation completed successfully.

Returns: other the operation failed.

See also: ReinstallProtocolInterface; InstallProtocolInterface; ParseCommandLineToArgs

Definition at line 293 of file ShellParametersProtocol.c.

◆ FindEndOfParameter()

CONST CHAR16 * FindEndOfParameter ( IN CONST CHAR16 * String )

Return the next parameter's end from a command line string.

Parameters

[in] String the string to parse

Definition at line 23 of file ShellParametersProtocol.c.

◆ FixFileName()

CHAR16 * FixFileName ( IN CHAR16 * FileName )

Fix a string to only have the file name, removing starting at the first space of whatever is quoted.

Parameters

[in] FileName The filename to start with.

Return values

NULL	FileName was invalid.

Returns: The modified FileName.

Definition at line 590 of file ShellParametersProtocol.c.

◆ FixVarName()

CHAR16 * FixVarName ( IN CHAR16 * FileName )

Fix a string to only have the environment variable name, removing starting at the first space of whatever is quoted and removing the leading and trailing %.

Parameters

[in] FileName The filename to start with.

Return values

NULL	FileName was invalid.

Returns: The modified FileName.

Definition at line 633 of file ShellParametersProtocol.c.

◆ GetNextParameter()

EFI_STATUS GetNextParameter	(	IN OUT CHAR16 **	Walker,
		IN OUT CHAR16 **	TempParameter,
		IN CONST UINTN	Length,
		IN BOOLEAN	StripQuotation
	)

Return the next parameter from a command line string.

This function moves the next parameter from Walker into TempParameter and moves Walker up past that parameter for recursive calling. When the final parameter is moved *Walker will be set to NULL;

Temp Parameter must be large enough to hold the parameter before calling this function.

This will also remove all remaining ^ characters after processing.

Parameters

[in,out]	Walker	pointer to string of command line. Adjusted to remaining command line on return
[in,out]	TempParameter	pointer to string of command line item extracted.
[in]	Length	buffer size of TempParameter.
[in]	StripQuotation	if TRUE then strip the quotation marks surrounding the parameters.

Returns: EFI_INVALID_PARAMETER A required parameter was NULL or pointed to a NULL or empty string.; EFI_NOT_FOUND A closing " could not be found on the specified string

Definition at line 82 of file ShellParametersProtocol.c.

◆ IsUnicodeFile()

EFI_STATUS IsUnicodeFile ( IN CONST CHAR16 * FileName )

Determine if a file name represents a unicode file.

Parameters

[in] FileName Pointer to the filename to open.

Return values

EFI_SUCCESS The file is a unicode file.

Returns: An error upon failure.

Definition at line 503 of file ShellParametersProtocol.c.

◆ ParseCommandLineToArgs()

EFI_STATUS ParseCommandLineToArgs	(	IN CONST CHAR16 *	CommandLine,
		IN BOOLEAN	StripQuotation,
		IN OUT CHAR16 ***	Argv,
		IN OUT UINTN *	Argc
	)

Function to populate Argc and Argv.

This function parses the CommandLine and divides it into standard C style Argc/Argv parameters for inclusion in EFI_SHELL_PARAMETERS_PROTOCOL. this supports space delimited and quote surrounded parameter definition.

All special character processing (alias, environment variable, redirection, etc... must be complete before calling this API.

Parameters

[in]	CommandLine	String of command line to parse
[in]	StripQuotation	if TRUE then strip the quotation marks surrounding the parameters.
[in,out]	Argv	pointer to array of strings; one for each parameter
[in,out]	Argc	pointer to number of strings in Argv array

Returns: EFI_SUCCESS the operation was successful; EFI_INVALID_PARAMETER some parameters are invalid; EFI_OUT_OF_RESOURCES a memory allocation failed.

Definition at line 191 of file ShellParametersProtocol.c.

◆ RestoreArgcArgv()

VOID RestoreArgcArgv	(	IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *	ShellParameters,
		IN CHAR16 ***	OldArgv,
		IN UINTN *	OldArgc
	)

Function will replace the current Argc and Argv in the ShellParameters protocol structure with Argv and Argc. The current values are de-allocated and the OldArgv must not be deallocated by the caller.

Parameters

[in,out]	ShellParameters	pointer to parameter structure to modify
[in]	OldArgv	pointer to old list of parameters
[in]	OldArgc	pointer to old number of items in Argv list

Definition at line 1499 of file ShellParametersProtocol.c.

◆ RestoreStdInStdOutStdErr()

EFI_STATUS RestoreStdInStdOutStdErr	(	IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *	ShellParameters,
		IN SHELL_FILE_HANDLE *	OldStdIn,
		IN SHELL_FILE_HANDLE *	OldStdOut,
		IN SHELL_FILE_HANDLE *	OldStdErr,
		IN SYSTEM_TABLE_INFO *	SystemTableInfo
	)

Function will replace the current StdIn and StdOut in the ShellParameters protocol structure with StdIn and StdOut. The current values are de-allocated.

Parameters

[in,out]	ShellParameters	Pointer to parameter structure to modify.
[in]	OldStdIn	Pointer to old StdIn.
[in]	OldStdOut	Pointer to old StdOut.
[in]	OldStdErr	Pointer to old StdErr.
[in]	SystemTableInfo	Pointer to old system table information.

Definition at line 1368 of file ShellParametersProtocol.c.

◆ StripQuotes()

VOID StripQuotes ( IN OUT CHAR16 * TheString )

Strips out quotes sections of a string.

All of the characters between quotes is replaced with spaces.

Parameters

[in,out] TheString A pointer to the string to update.

Definition at line 539 of file ShellParametersProtocol.c.

◆ UpdateArgcArgv()

EFI_STATUS UpdateArgcArgv	(	IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *	ShellParameters,
		IN CONST CHAR16 *	NewCommandLine,
		IN SHELL_OPERATION_TYPES	Type,
		OUT CHAR16 ***OldArgv	OPTIONAL,
		OUT UINTN *OldArgc	OPTIONAL
	)

Function will replace the current Argc and Argv in the ShellParameters protocol structure by parsing NewCommandLine. The current values are returned to the user.

If OldArgv or OldArgc is NULL then that value is not returned.

Parameters

[in,out]	ShellParameters	Pointer to parameter structure to modify.
[in]	NewCommandLine	The new command line to parse and use.
[in]	Type	The type of operation.
[out]	OldArgv	Pointer to old list of parameters.
[out]	OldArgc	Pointer to old number of items in Argv list.

Return values

EFI_SUCCESS Operation was successful, Argv and Argc are valid.

Returns: EFI_INVALID_PARAMETER Some parameters are invalid.

Return values

EFI_OUT_OF_RESOURCES A memory allocation failed.

Definition at line 1456 of file ShellParametersProtocol.c.

◆ UpdateStdInStdOutStdErr()

EFI_STATUS UpdateStdInStdOutStdErr	(	IN OUT EFI_SHELL_PARAMETERS_PROTOCOL *	ShellParameters,
		IN CHAR16 *	NewCommandLine,
		OUT SHELL_FILE_HANDLE *	OldStdIn,
		OUT SHELL_FILE_HANDLE *	OldStdOut,
		OUT SHELL_FILE_HANDLE *	OldStdErr,
		OUT SYSTEM_TABLE_INFO *	SystemTableInfo
	)

Function will replace the current StdIn and StdOut in the ShellParameters protocol structure by parsing NewCommandLine. The current values are returned to the user.

This will also update the system table.

Parameters

[in,out]	ShellParameters	Pointer to parameter structure to modify.
[in]	NewCommandLine	The new command line to parse and use.
[out]	OldStdIn	Pointer to old StdIn.
[out]	OldStdOut	Pointer to old StdOut.
[out]	OldStdErr	Pointer to old StdErr.
[out]	SystemTableInfo	Pointer to old system table information.

Return values

EFI_SUCCESS	Operation was successful, Argv and Argc are valid.
EFI_OUT_OF_RESOURCES	A memory allocation failed.

Definition at line 701 of file ShellParametersProtocol.c.

◆ WriteFileTag()

EFI_STATUS WriteFileTag ( IN SHELL_FILE_HANDLE FileHandle )

Write the unicode file tag to the specified file.

It is the caller's responsibility to ensure that ShellInfoObject.NewEfiShellProtocol has been initialized before calling this function.

Parameters

[in] FileHandle The file to write the unicode file tag to.

Returns: Status code from ShellInfoObject.NewEfiShellProtocol->WriteFile.

Definition at line 664 of file ShellParametersProtocol.c.

Variable Documentation

◆ AsciiRedirection

BOOLEAN AsciiRedirection = FALSE

Definition at line 15 of file ShellParametersProtocol.c.

Functions

Variables

Detailed Description

Function Documentation

◆ CalculateEfiHdrCrc()

◆ CleanUpShellParametersProtocol()

◆ CreatePopulateInstallShellParametersProtocol()

◆ FindEndOfParameter()

◆ FixFileName()

◆ FixVarName()

◆ GetNextParameter()

◆ IsUnicodeFile()

◆ ParseCommandLineToArgs()

◆ RestoreArgcArgv()

◆ RestoreStdInStdOutStdErr()

◆ StripQuotes()

◆ UpdateArgcArgv()

◆ UpdateStdInStdOutStdErr()

◆ WriteFileTag()

Variable Documentation

◆ AsciiRedirection