1 /** @file
2 Main file for Shift shell level 1 function.
3
4 (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
5 Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php
10
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13
14 **/
15
16 #include "UefiShellLevel1CommandsLib.h"
17
18 /**
19 Function for 'shift' command.
20
21 @param[in] ImageHandle Handle to the Image (NULL if Internal).
22 @param[in] SystemTable Pointer to the System Table (NULL if Internal).
23 **/
24 SHELL_STATUS
25 EFIAPI
ShellCommandRunShift(IN EFI_HANDLE ImageHandle,IN EFI_SYSTEM_TABLE * SystemTable)26 ShellCommandRunShift (
27 IN EFI_HANDLE ImageHandle,
28 IN EFI_SYSTEM_TABLE *SystemTable
29 )
30 {
31 EFI_STATUS Status;
32 SCRIPT_FILE *CurrentScriptFile;
33 UINTN LoopVar;
34
35 Status = CommandInit();
36 ASSERT_EFI_ERROR(Status);
37
38 if (!gEfiShellProtocol->BatchIsActive()) {
39 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"shift");
40 return (SHELL_UNSUPPORTED);
41 }
42
43 CurrentScriptFile = ShellCommandGetCurrentScriptFile();
44 ASSERT(CurrentScriptFile != NULL);
45
46 if (CurrentScriptFile->Argc < 2) {
47 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle, L"shift");
48 return (SHELL_UNSUPPORTED);
49 }
50
51 for (LoopVar = 0 ; LoopVar < CurrentScriptFile->Argc ; LoopVar++) {
52 if (LoopVar == 0) {
53 SHELL_FREE_NON_NULL(CurrentScriptFile->Argv[LoopVar]);
54 }
55 if (LoopVar < CurrentScriptFile->Argc -1) {
56 CurrentScriptFile->Argv[LoopVar] = CurrentScriptFile->Argv[LoopVar+1];
57 } else {
58 CurrentScriptFile->Argv[LoopVar] = NULL;
59 }
60 }
61 CurrentScriptFile->Argc--;
62 return (SHELL_SUCCESS);
63 }
64
65