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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/** @file
A shell application that triggers capsule update process.
Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.<BR>
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 <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/SimpleFileSystem.h>
#include <Protocol/ShellParameters.h>
#include <Protocol/Shell.h>
#include <Guid/FileInfo.h>
UINTN Argc;
CHAR16 **Argv;
EFI_SHELL_PROTOCOL *mShellProtocol = NULL;
/**
This function parse application ARG.
@return Status
**/
EFI_STATUS
GetArg (
VOID
)
{
EFI_STATUS Status;
EFI_SHELL_PARAMETERS_PROTOCOL *ShellParameters;
Status = gBS->HandleProtocol (
gImageHandle,
&gEfiShellParametersProtocolGuid,
(VOID**)&ShellParameters
);
if (EFI_ERROR(Status)) {
return Status;
}
Argc = ShellParameters->Argc;
Argv = ShellParameters->Argv;
return EFI_SUCCESS;
}
/**
Get shell protocol.
@return Pointer to shell protocol.
**/
EFI_SHELL_PROTOCOL *
GetShellProtocol (
VOID
)
{
EFI_STATUS Status;
if (mShellProtocol == NULL) {
Status = gBS->LocateProtocol (
&gEfiShellProtocolGuid,
NULL,
(VOID **) &mShellProtocol
);
if (EFI_ERROR (Status)) {
mShellProtocol = NULL;
}
}
return mShellProtocol;
}
/**
Read a file.
@param[in] FileName The file to be read.
@param[out] BufferSize The file buffer size
@param[out] Buffer The file buffer
@retval EFI_SUCCESS Read file successfully
@retval EFI_NOT_FOUND Shell protocol or file not found
@retval others Read file failed
**/
EFI_STATUS
ReadFileToBuffer (
IN CHAR16 *FileName,
OUT UINTN *BufferSize,
OUT VOID **Buffer
)
{
EFI_STATUS Status;
EFI_SHELL_PROTOCOL *ShellProtocol;
SHELL_FILE_HANDLE Handle;
UINT64 FileSize;
UINTN TempBufferSize;
VOID *TempBuffer;
ShellProtocol = GetShellProtocol();
if (ShellProtocol == NULL) {
return EFI_NOT_FOUND;
}
//
// Open file by FileName.
//
Status = ShellProtocol->OpenFileByName (
FileName,
&Handle,
EFI_FILE_MODE_READ
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get the file size.
//
Status = ShellProtocol->GetFileSize (Handle, &FileSize);
if (EFI_ERROR (Status)) {
ShellProtocol->CloseFile (Handle);
return Status;
}
TempBufferSize = (UINTN) FileSize;
TempBuffer = AllocateZeroPool (TempBufferSize);
if (TempBuffer == NULL) {
ShellProtocol->CloseFile (Handle);
return EFI_OUT_OF_RESOURCES;
}
//
// Read the file data to the buffer
//
Status = ShellProtocol->ReadFile (
Handle,
&TempBufferSize,
TempBuffer
);
if (EFI_ERROR (Status)) {
ShellProtocol->CloseFile (Handle);
return Status;
}
ShellProtocol->CloseFile (Handle);
*BufferSize = TempBufferSize;
*Buffer = TempBuffer;
return EFI_SUCCESS;
}
/**
Write a file.
@param[in] FileName The file to be written.
@param[in] BufferSize The file buffer size
@param[in] Buffer The file buffer
@retval EFI_SUCCESS Write file successfully
@retval EFI_NOT_FOUND Shell protocol not found
@retval others Write file failed
**/
EFI_STATUS
WriteFileFromBuffer (
IN CHAR16 *FileName,
IN UINTN BufferSize,
IN VOID *Buffer
)
{
EFI_STATUS Status;
EFI_SHELL_PROTOCOL *ShellProtocol;
SHELL_FILE_HANDLE Handle;
EFI_FILE_INFO *FileInfo;
UINTN TempBufferSize;
ShellProtocol = GetShellProtocol();
if (ShellProtocol == NULL) {
return EFI_NOT_FOUND;
}
//
// Open file by FileName.
//
Status = ShellProtocol->OpenFileByName (
FileName,
&Handle,
EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Empty the file contents.
//
FileInfo = ShellProtocol->GetFileInfo (Handle);
if (FileInfo == NULL) {
ShellProtocol->CloseFile (Handle);
return EFI_DEVICE_ERROR;
}
//
// If the file size is already 0, then it has been empty.
//
if (FileInfo->FileSize != 0) {
//
// Set the file size to 0.
//
FileInfo->FileSize = 0;
Status = ShellProtocol->SetFileInfo (Handle, FileInfo);
if (EFI_ERROR (Status)) {
FreePool (FileInfo);
ShellProtocol->CloseFile (Handle);
return Status;
}
}
FreePool (FileInfo);
//
// Write the file data from the buffer
//
TempBufferSize = BufferSize;
Status = ShellProtocol->WriteFile (
Handle,
&TempBufferSize,
Buffer
);
if (EFI_ERROR (Status)) {
ShellProtocol->CloseFile (Handle);
return Status;
}
ShellProtocol->CloseFile (Handle);
return EFI_SUCCESS;
}
|
