1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/** @file
*
* Copyright (c) 2011, ARM Limited. All rights reserved.
*
* This program and the accompanying materials
* are licensed and made available under the terms and conditions of the BSD License
* which accompanies this distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
**/
#include "Ebl.h"
#include <Guid/GlobalVariable.h>
EFI_STATUS
EblGetCmd (
IN UINTN Argc,
IN CHAR8 **Argv
)
{
EFI_STATUS Status = EFI_INVALID_PARAMETER;
UINTN Size;
VOID* Value;
CHAR8* AsciiVariableName = NULL;
CHAR16* VariableName;
UINT32 Index;
if (Argc == 1) {
AsciiPrint("Variable name is missing.\n");
return Status;
}
for (Index = 1; Index < Argc; Index++) {
if (Argv[Index][0] == '-') {
AsciiPrint("Warning: '%a' not recognized.\n",Argv[Index]);
} else {
AsciiVariableName = Argv[Index];
}
}
if (AsciiVariableName == NULL) {
AsciiPrint("Variable name is missing.\n");
return Status;
} else {
VariableName = AllocatePool((AsciiStrLen (AsciiVariableName) + 1) * sizeof (CHAR16));
AsciiStrToUnicodeStr (AsciiVariableName,VariableName);
}
// Try to get the variable size.
Value = NULL;
Size = 0;
Status = gRT->GetVariable (VariableName, &gEfiGlobalVariableGuid, NULL, &Size, Value);
if (Status == EFI_NOT_FOUND) {
AsciiPrint("Variable name '%a' not found.\n",VariableName);
} else if (Status == EFI_BUFFER_TOO_SMALL) {
// Get the environment variable value
Value = AllocatePool (Size);
if (Value == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = gRT->GetVariable ((CHAR16 *)VariableName, &gEfiGlobalVariableGuid, NULL, &Size, Value);
if (EFI_ERROR (Status)) {
AsciiPrint("Error: '%r'\n",Status);
} else {
AsciiPrint("%a=%a\n",AsciiVariableName,Value);
}
FreePool(Value);
} else {
AsciiPrint("Error: '%r'\n",Status);
}
FreePool(VariableName);
return Status;
}
EFI_STATUS
EblSetCmd (
IN UINTN Argc,
IN CHAR8 **Argv
)
{
EFI_STATUS Status = EFI_INVALID_PARAMETER;
CHAR8* AsciiVariableSetting = NULL;
CHAR8* AsciiVariableName;
CHAR8* AsciiValue;
UINT32 AsciiValueLength;
CHAR16* VariableName;
UINT32 Index;
UINT32 EscapedQuotes = 0;
BOOLEAN Volatile = FALSE;
if (Argc == 1) {
AsciiPrint("Variable name is missing.\n");
return Status;
}
for (Index = 1; Index < Argc; Index++) {
if (AsciiStrCmp(Argv[Index],"-v") == 0) {
Volatile = 0;
} else if (Argv[Index][0] == '-') {
AsciiPrint("Warning: '%a' not recognized.\n",Argv[Index]);
} else {
AsciiVariableSetting = Argv[Index];
}
}
if (AsciiVariableSetting == NULL) {
AsciiPrint("Variable name is missing.\n");
return Status;
}
// Check if it is a valid variable setting
AsciiValue = AsciiStrStr (AsciiVariableSetting,"=");
if (AsciiValue == NULL) {
AsciiPrint("Variable setting is incorrect. It should be VariableName=Value\n");
return Status;
}
AsciiValue[0] = '\0';
AsciiVariableName = AsciiVariableSetting;
AsciiValue++;
// Clean AsciiValue from quote
if (AsciiValue[0] == '"') {
AsciiValue++;
}
AsciiValueLength = AsciiStrLen (AsciiValue);
if ((AsciiValue[AsciiValueLength-2] != '\\') && (AsciiValue[AsciiValueLength-1] == '"')) {
AsciiValue[AsciiValueLength-1] = '\0';
}
// Clean AsciiValue from escaped quotes
for (Index = 0; Index < AsciiValueLength; Index++) {
if ((Index > 0) && (AsciiValue[Index-1] == '\\') && (AsciiValue[Index] == '"')) {
EscapedQuotes++;
}
AsciiValue[Index-EscapedQuotes] = AsciiValue[Index];
}
// Fill the end of the value with '\0'
for (Index = 0; Index < EscapedQuotes; Index++) {
AsciiValue[AsciiValueLength-1-Index] = '\0';
}
// Convert VariableName into Unicode
VariableName = AllocatePool((AsciiStrLen (AsciiVariableName) + 1) * sizeof (CHAR16));
AsciiStrToUnicodeStr (AsciiVariableName,VariableName);
Status = gRT->SetVariable (
VariableName,
&gEfiGlobalVariableGuid,
( !Volatile ? EFI_VARIABLE_NON_VOLATILE : 0) |
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
AsciiStrLen (AsciiValue)+1,
AsciiValue
);
AsciiPrint("'%a'='%a'\n",AsciiVariableName,AsciiValue);
return Status;
}
GLOBAL_REMOVE_IF_UNREFERENCED const EBL_COMMAND_TABLE mCmdVariableTemplate[] =
{
{
"get",
" ; get UEFI variable\n\r [v]; verbose",
NULL,
EblGetCmd
},
{
"set",
" ; set UEFI variable\n\r [v]; create volatile variable",
NULL,
EblSetCmd
}
};
/**
Initialize the commands in this in this file
**/
VOID
EblInitializeVariableCmds (
VOID
)
{
EblAddCommands (mCmdVariableTemplate, sizeof (mCmdVariableTemplate)/sizeof (EBL_COMMAND_TABLE));
}
|
