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
|
// Copyright (c) 2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This command-line program dumps the contents of a set of cache files, either
// to stdout or to another set of cache files.
#include <stdio.h>
#include <string>
#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/process_util.h"
#include "base/scoped_handle.h"
#include "base/string_util.h"
#include "net/disk_cache/disk_format.h"
enum Errors {
GENERIC = -1,
ALL_GOOD = 0,
INVALID_ARGUMENT = 1,
FILE_ACCESS_ERROR,
UNKNOWN_VERSION,
TOOL_NOT_FOUND,
};
int GetMajorVersion(const std::wstring& input_path);
int DumpContents(const std::wstring& input_path);
int DumpHeaders(const std::wstring& input_path);
int RunSlave(const std::wstring& input_path, const std::wstring& pipe_number);
int CopyCache(const std::wstring& output_path, HANDLE pipe, bool copy_to_text);
HANDLE CreateServer(std::wstring* pipe_number);
const char kUpgradeHelp[] =
"\nIn order to use the upgrade function, a version of this tool that\n"
"understands the file format of the files to upgrade is needed. For\n"
"instance, to upgrade files saved with file format 3.4 to version 5.2,\n"
"a version of this program that was compiled with version 3.4 has to be\n"
"located beside this executable, and named dump_cache_3.exe, and this\n"
"executable should be compiled with version 5.2 being the current one.";
// Folders to read and write cache files.
const wchar_t kInputPath[] = L"input";
const wchar_t kOutputPath[] = L"output";
// Dumps the file headers to stdout.
const wchar_t kDumpHeaders[] = L"dump-headers";
// Dumps all entries to stdout.
const wchar_t kDumpContents[] = L"dump-contents";
// Convert the cache to files.
const wchar_t kDumpToFiles[] = L"dump-to-files";
// Upgrade an old version to the current one.
const wchar_t kUpgrade[] = L"upgrade";
// Internal use:
const wchar_t kSlave[] = L"slave";
const wchar_t kPipe[] = L"pipe";
int Help() {
printf("warning: input files are modified by this tool\n");
printf("dump_cache --input=path1 [--output=path2]\n");
printf("--dump-headers: display file headers\n");
printf("--dump-contents: display all entries\n");
printf("--upgrade: copy contents to the output path\n");
printf("--dump-to-files: write the contents of the cache to files\n");
return INVALID_ARGUMENT;
}
// Starts a new process, to generate the files.
int LaunchSlave(const CommandLine& command_line,
const std::wstring& pipe_number, int version) {
// TODO(port): remove this string-munging hackery.
std::wstring hacked_command_line = command_line.command_line_string();
const std::wstring old_exe(L"dump_cache.exe");
size_t to_remove = hacked_command_line.find(old_exe);
hacked_command_line.erase(to_remove, old_exe.size());
bool do_upgrade = command_line.HasSwitch(kUpgrade);
bool do_convert_to_text = command_line.HasSwitch(kDumpToFiles);
std::wstring new_program;
if (do_upgrade)
new_program = StringPrintf(L"%ls%d.exe", L"dump_cache_", version);
else
new_program = StringPrintf(L"dump_cache.exe");
hacked_command_line.insert(to_remove, new_program);
CommandLine new_command_line(L"");
new_command_line.ParseFromString(hacked_command_line);
if (do_upgrade || do_convert_to_text)
new_command_line.AppendSwitch(kSlave);
new_command_line.AppendSwitchWithValue(kPipe, pipe_number);
if (!base::LaunchApp(new_command_line, false, false, NULL)) {
printf("Unable to launch the needed version of this tool: %ls\n",
new_program.c_str());
printf(kUpgradeHelp);
return TOOL_NOT_FOUND;
}
return ALL_GOOD;
}
// -----------------------------------------------------------------------
int main(int argc, const char* argv[]) {
// Setup an AtExitManager so Singleton objects will be destroyed.
base::AtExitManager at_exit_manager;
CommandLine::Init(argc, argv);
const CommandLine& command_line = *CommandLine::ForCurrentProcess();
std::wstring input_path = command_line.GetSwitchValue(kInputPath);
if (input_path.empty())
return Help();
bool upgrade = false;
bool slave_required = false;
bool copy_to_text = false;
std::wstring output_path = command_line.GetSwitchValue(kOutputPath);
if (command_line.HasSwitch(kUpgrade))
upgrade = true;
if (command_line.HasSwitch(kDumpToFiles))
copy_to_text = true;
if (upgrade || copy_to_text) {
if (output_path.empty())
return Help();
slave_required = true;
}
int version = GetMajorVersion(input_path);
if (!version)
return FILE_ACCESS_ERROR;
if (version != disk_cache::kCurrentVersion >> 16) {
if (command_line.HasSwitch(kSlave)) {
printf("Unknown version\n");
return UNKNOWN_VERSION;
}
slave_required = true;
}
std::wstring pipe_number = command_line.GetSwitchValue(kPipe);
if (command_line.HasSwitch(kSlave) && slave_required)
return RunSlave(input_path, pipe_number);
ScopedHandle server;
if (slave_required) {
server.Set(CreateServer(&pipe_number));
if (!server.IsValid()) {
printf("Unable to create the server pipe\n");
return -1;
}
int ret = LaunchSlave(command_line, pipe_number, version);
if (ret)
return ret;
}
if (upgrade || copy_to_text)
return CopyCache(output_path, server, copy_to_text);
if (slave_required) {
// Wait until the slave starts dumping data before we quit. Lazy "fix" for a
// console quirk.
Sleep(500);
return ALL_GOOD;
}
if (command_line.HasSwitch(kDumpContents))
return DumpContents(input_path);
if (command_line.HasSwitch(kDumpHeaders))
return DumpHeaders(input_path);
return Help();
}
|
