1 /** @file
2 Main file for Echo shell level 3 function.
3
4 (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
5 Copyright (c) 2009 - 2012, 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 "UefiShellLevel3CommandsLib.h"
17
18 #include <Library/ShellLib.h>
19
20 STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
21 {L"-on", TypeFlag},
22 {L"-off", TypeFlag},
23 {NULL, TypeMax}
24 };
25
26 /**
27 Function for 'echo' command.
28
29 @param[in] ImageHandle Handle to the Image (NULL if Internal).
30 @param[in] SystemTable Pointer to the System Table (NULL if Internal).
31 **/
32 SHELL_STATUS
33 EFIAPI
ShellCommandRunEcho(IN EFI_HANDLE ImageHandle,IN EFI_SYSTEM_TABLE * SystemTable)34 ShellCommandRunEcho (
35 IN EFI_HANDLE ImageHandle,
36 IN EFI_SYSTEM_TABLE *SystemTable
37 )
38 {
39 EFI_STATUS Status;
40 LIST_ENTRY *Package;
41 SHELL_STATUS ShellStatus;
42 UINTN ParamCount;
43 CHAR16 *ProblemParam;
44 UINTN Size;
45 CHAR16 *PrintString;
46
47 Size = 0;
48 ProblemParam = NULL;
49 PrintString = NULL;
50 ShellStatus = SHELL_SUCCESS;
51
52 //
53 // initialize the shell lib (we must be in non-auto-init...)
54 //
55 Status = ShellInitialize();
56 ASSERT_EFI_ERROR(Status);
57
58 //
59 // parse the command line
60 //
61 Status = ShellCommandLineParseEx (ParamList, &Package, &ProblemParam, TRUE, TRUE);
62 if (EFI_ERROR(Status)) {
63 if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
64 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, L"echo", ProblemParam);
65 FreePool(ProblemParam);
66 ShellStatus = SHELL_INVALID_PARAMETER;
67 } else {
68 ASSERT(FALSE);
69 }
70 } else {
71 //
72 // check for "-?"
73 //
74 if (ShellCommandLineGetFlag(Package, L"-?")) {
75 ASSERT(FALSE);
76 }
77 if (ShellCommandLineGetFlag(Package, L"-on")) {
78 //
79 // Turn it on
80 //
81 ShellCommandSetEchoState(TRUE);
82 } else if (ShellCommandLineGetFlag(Package, L"-off")) {
83 //
84 // turn it off
85 //
86 ShellCommandSetEchoState(FALSE);
87 } else if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
88 //
89 // output its current state
90 //
91 if (ShellCommandGetEchoState()) {
92 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_ECHO_ON), gShellLevel3HiiHandle);
93 } else {
94 ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_ECHO_OFF), gShellLevel3HiiHandle);
95 }
96 } else {
97 //
98 // print the line
99 //
100 for ( ParamCount = 1
101 ; ShellCommandLineGetRawValue(Package, ParamCount) != NULL
102 ; ParamCount++
103 ) {
104 StrnCatGrow(&PrintString, &Size, ShellCommandLineGetRawValue(Package, ParamCount), 0);
105 if (ShellCommandLineGetRawValue(Package, ParamCount+1) != NULL) {
106 StrnCatGrow(&PrintString, &Size, L" ", 0);
107 }
108 }
109 ShellPrintEx(-1, -1, L"%s\r\n", PrintString);
110 SHELL_FREE_NON_NULL(PrintString);
111 }
112
113 //
114 // free the command line package
115 //
116 ShellCommandLineFreeVarList (Package);
117 }
118
119 return (ShellStatus);
120 }
121
122