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audk/ShellPkg/Library/UefiShellLevel3CommandsLib/Alias.c

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/** @file
Main file for Alias shell level 3 function.
(C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
Copyright (c) 2009 - 2017, 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
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "UefiShellLevel3CommandsLib.h"
#include <Library/ShellLib.h>
/**
Print out single alias registered with the Shell.
@param[in] Alias Points to the NULL-terminated shell alias.
If this parameter is NULL, then all
aliases will be returned in ReturnedData.
@retval SHELL_SUCCESS the printout was sucessful
**/
SHELL_STATUS
PrintSingleShellAlias(
IN CONST CHAR16 *Alias
)
{
CONST CHAR16 *ConstAliasVal;
SHELL_STATUS ShellStatus;
BOOLEAN Volatile;
ShellStatus = SHELL_SUCCESS;
ConstAliasVal = gEfiShellProtocol->GetAlias (Alias, &Volatile);
if (ConstAliasVal == NULL) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_PARAM_INV), gShellLevel3HiiHandle, L"alias", Alias);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
if (ShellCommandIsOnAliasList (Alias)) {
Volatile = FALSE;
}
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_ALIAS_OUTPUT), gShellLevel3HiiHandle, !Volatile ? L' ' : L'*', Alias, ConstAliasVal);
}
return ShellStatus;
}
/**
Print out each alias registered with the Shell.
@retval STATUS_SUCCESS the printout was sucessful
@return any return code from GetNextVariableName except EFI_NOT_FOUND
**/
SHELL_STATUS
PrintAllShellAlias(
VOID
)
{
CONST CHAR16 *ConstAllAliasList;
CHAR16 *Alias;
CHAR16 *Walker;
ConstAllAliasList = gEfiShellProtocol->GetAlias(NULL, NULL);
if (ConstAllAliasList == NULL) {
return (SHELL_SUCCESS);
}
Alias = AllocateZeroPool(StrSize(ConstAllAliasList));
if (Alias == NULL) {
return (SHELL_OUT_OF_RESOURCES);
}
Walker = (CHAR16*)ConstAllAliasList;
do {
CopyMem(Alias, Walker, StrSize(Walker));
Walker = StrStr(Alias, L";");
if (Walker != NULL) {
Walker[0] = CHAR_NULL;
Walker = Walker + 1;
}
PrintSingleShellAlias(Alias);
} while (Walker != NULL && Walker[0] != CHAR_NULL);
FreePool(Alias);
return (SHELL_SUCCESS);
}
/**
Changes a shell command alias.
This function creates an alias for a shell command or if Alias is NULL it will delete an existing alias.
@param[in] Command Points to the NULL-terminated shell command or existing alias.
@param[in] Alias Points to the NULL-terminated alias for the shell command. If this is NULL, and
Command refers to an alias, that alias will be deleted.
@param[in] Replace If TRUE and the alias already exists, then the existing alias will be replaced. If
FALSE and the alias already exists, then the existing alias is unchanged and
EFI_ACCESS_DENIED is returned.
@param[in] Volatile if TRUE the Alias being set will be stored in a volatile fashion. if FALSE the
Alias being set will be stored in a non-volatile fashion.
@retval SHELL_SUCCESS Alias created or deleted successfully.
@retval SHELL_NOT_FOUND the Alias intended to be deleted was not found
@retval SHELL_ACCESS_DENIED The alias is a built-in alias or already existed and Replace was set to
FALSE.
@retval SHELL_DEVICE_ERROR Command is null or the empty string.
**/
SHELL_STATUS
ShellLevel3CommandsLibSetAlias(
IN CONST CHAR16 *Command,
IN CONST CHAR16 *Alias,
IN BOOLEAN Replace,
IN BOOLEAN Volatile
)
{
SHELL_STATUS ShellStatus;
EFI_STATUS Status;
ShellStatus = SHELL_SUCCESS;
Status = gEfiShellProtocol->SetAlias (Command, Alias, Replace, Volatile);
if (EFI_ERROR(Status)) {
if (Status == EFI_ACCESS_DENIED) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_ERR_AD), gShellLevel3HiiHandle, L"alias");
ShellStatus = SHELL_ACCESS_DENIED;
} else if (Status == EFI_NOT_FOUND) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_ERR_NOT_FOUND), gShellLevel3HiiHandle, L"alias", Command);
ShellStatus = SHELL_NOT_FOUND;
} else {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_ERR_UK), gShellLevel3HiiHandle, L"alias", Status);
ShellStatus = SHELL_DEVICE_ERROR;
}
}
return ShellStatus;
}
STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
{L"-v", TypeFlag},
{L"-d", TypeValue},
{NULL, TypeMax}
};
/**
Function for 'alias' command.
@param[in] ImageHandle Handle to the Image (NULL if Internal).
@param[in] SystemTable Pointer to the System Table (NULL if Internal).
**/
SHELL_STATUS
EFIAPI
ShellCommandRunAlias (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
LIST_ENTRY *Package;
CHAR16 *ProblemParam;
SHELL_STATUS ShellStatus;
CONST CHAR16 *Param1;
CONST CHAR16 *Param2;
CONST CHAR16 *ParamStrD;
CHAR16 *CleanParam2;
BOOLEAN DeleteFlag;
BOOLEAN VolatileFlag;
ProblemParam = NULL;
ShellStatus = SHELL_SUCCESS;
CleanParam2 = NULL;
//
// initialize the shell lib (we must be in non-auto-init...)
//
Status = ShellInitialize();
ASSERT_EFI_ERROR(Status);
Status = CommandInit();
ASSERT_EFI_ERROR(Status);
//
// parse the command line
//
Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
if (EFI_ERROR(Status)) {
if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, L"alias", ProblemParam);
FreePool(ProblemParam);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
ASSERT(FALSE);
}
} else {
Param1 = ShellCommandLineGetRawValue(Package, 1);
Param2 = ShellCommandLineGetRawValue(Package, 2);
DeleteFlag = ShellCommandLineGetFlag (Package, L"-d");
VolatileFlag = ShellCommandLineGetFlag (Package, L"-v");
if (Param2 != NULL) {
CleanParam2 = AllocateCopyPool (StrSize(Param2), Param2);
if (CleanParam2 == NULL) {
ShellCommandLineFreeVarList (Package);
return SHELL_OUT_OF_RESOURCES;
}
if (CleanParam2[0] == L'\"' && CleanParam2[StrLen(CleanParam2)-1] == L'\"') {
CleanParam2[StrLen(CleanParam2)-1] = L'\0';
CopyMem (CleanParam2, CleanParam2 + 1, StrSize(CleanParam2) - sizeof(CleanParam2[0]));
}
}
if (!DeleteFlag && !VolatileFlag) {
switch (ShellCommandLineGetCount (Package)) {
case 1:
//
// "alias"
//
ShellStatus = PrintAllShellAlias ();
break;
case 2:
//
// "alias Param1"
//
ShellStatus = PrintSingleShellAlias (Param1);
break;
case 3:
//
// "alias Param1 CleanParam2"
//
ShellStatus = ShellLevel3CommandsLibSetAlias (CleanParam2, Param1, FALSE, VolatileFlag);
break;
default:
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle, L"alias");
ShellStatus = SHELL_INVALID_PARAMETER;
}
} else if (DeleteFlag) {
if (VolatileFlag || ShellCommandLineGetCount (Package) > 1) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle, L"alias");
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
ParamStrD = ShellCommandLineGetValue (Package, L"-d");
if (ParamStrD == NULL) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel3HiiHandle, L"alias");
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
//
// Delete an alias: "alias -d ParamStrD"
//
ShellStatus = ShellLevel3CommandsLibSetAlias (ParamStrD, NULL, TRUE, FALSE);
}
}
} else {
//
// Set volatile alias.
//
ASSERT (VolatileFlag);
ASSERT (!DeleteFlag);
switch (ShellCommandLineGetCount (Package)) {
case 1:
case 2:
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel3HiiHandle, L"alias");
ShellStatus = SHELL_INVALID_PARAMETER;
break;
case 3:
//
// "alias -v Param1 CleanParam2"
//
ShellStatus = ShellLevel3CommandsLibSetAlias (CleanParam2, Param1, FALSE, VolatileFlag);
break;
default:
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle, L"alias");
ShellStatus = SHELL_INVALID_PARAMETER;
}
}
//
// free the command line package
//
ShellCommandLineFreeVarList (Package);
}
SHELL_FREE_NON_NULL (CleanParam2);
return (ShellStatus);
}
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