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/** @file
Main file for Echo shell level 3 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 "UefiShellLevel3CommandsLib.h"
#include <Library/ShellLib.h>
STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
{L"-on", TypeFlag},
{L"-off", TypeFlag},
{NULL, TypeMax}
};
/**
Function for 'echo' 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
ShellCommandRunEcho (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
LIST_ENTRY *Package;
SHELL_STATUS ShellStatus;
UINTN ParamCount;
CHAR16 *ProblemParam;
UINTN Size;
CHAR16 *PrintString;
Size = 0;
ProblemParam = NULL;
PrintString = NULL;
ShellStatus = SHELL_SUCCESS;
//
// initialize the shell lib (we must be in non-auto-init...)
//
Status = ShellInitialize();
ASSERT_EFI_ERROR(Status);
//
// parse the command line
//
Status = ShellCommandLineParseEx (ParamList, &Package, &ProblemParam, TRUE, TRUE);
if (EFI_ERROR(Status)) {
if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, L"echo", ProblemParam);
FreePool(ProblemParam);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
ASSERT(FALSE);
}
} else {
//
// check for "-?"
//
if (ShellCommandLineGetFlag(Package, L"-?")) {
ASSERT(FALSE);
}
if (ShellCommandLineGetFlag(Package, L"-on")) {
//
// Turn it on
//
ShellCommandSetEchoState(TRUE);
} else if (ShellCommandLineGetFlag(Package, L"-off")) {
//
// turn it off
//
ShellCommandSetEchoState(FALSE);
} else if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
//
// output its current state
//
if (ShellCommandGetEchoState()) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_ECHO_ON), gShellLevel3HiiHandle);
} else {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_ECHO_OFF), gShellLevel3HiiHandle);
}
} else {
//
// print the line
//
for ( ParamCount = 1
; ShellCommandLineGetRawValue(Package, ParamCount) != NULL
; ParamCount++
) {
StrnCatGrow(&PrintString, &Size, ShellCommandLineGetRawValue(Package, ParamCount), 0);
if (ShellCommandLineGetRawValue(Package, ParamCount+1) != NULL) {
StrnCatGrow(&PrintString, &Size, L" ", 0);
}
}
ShellPrintEx(-1, -1, L"%s\r\n", PrintString);
SHELL_FREE_NON_NULL(PrintString);
}
//
// free the command line package
//
ShellCommandLineFreeVarList (Package);
}
return (ShellStatus);
}
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