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 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
