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/** @file
Main file for Shift shell level 1 function.
(C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "UefiShellLevel1CommandsLib.h"
/**
Function for 'shift' 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
ShellCommandRunShift (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
SCRIPT_FILE *CurrentScriptFile;
UINTN LoopVar;
Status = CommandInit ();
ASSERT_EFI_ERROR (Status);
if (!gEfiShellProtocol->BatchIsActive ()) {
ShellPrintHiiDefaultEx (STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"shift");
return (SHELL_UNSUPPORTED);
}
CurrentScriptFile = ShellCommandGetCurrentScriptFile ();
if (CurrentScriptFile == NULL) {
ASSERT (CurrentScriptFile != NULL);
return (SHELL_INVALID_PARAMETER);
}
if (CurrentScriptFile->Argc < 2) {
ShellPrintHiiDefaultEx (STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle, L"shift");
return (SHELL_UNSUPPORTED);
}
for (LoopVar = 0; LoopVar < CurrentScriptFile->Argc; LoopVar++) {
if (LoopVar == 0) {
SHELL_FREE_NON_NULL (CurrentScriptFile->Argv[LoopVar]);
}
if (LoopVar < CurrentScriptFile->Argc -1) {
CurrentScriptFile->Argv[LoopVar] = CurrentScriptFile->Argv[LoopVar+1];
} else {
CurrentScriptFile->Argv[LoopVar] = NULL;
}
}
CurrentScriptFile->Argc--;
return (SHELL_SUCCESS);
}
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