1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/installer/util/logging_installer.h"
6
7 #include <stdint.h>
8 #include <windows.h>
9
10 #include "base/command_line.h"
11 #include "base/files/file.h"
12 #include "base/files/file_path.h"
13 #include "base/files/file_util.h"
14 #include "base/logging.h"
15 #include "base/logging_win.h"
16 #include "base/path_service.h"
17 #include "base/strings/string_util.h"
18 #include "base/strings/utf_string_conversions.h"
19 #include "base/win/scoped_handle.h"
20 #include "build/branding_buildflags.h"
21 #include "chrome/installer/util/initial_preferences.h"
22 #include "chrome/installer/util/initial_preferences_constants.h"
23 #include "chrome/installer/util/util_constants.h"
24
25 // {93BCE0BF-3FAF-43b1-9E28-BEB6FAB5ECE7}
26 static const GUID kSetupTraceProvider = {
27 0x93bce0bf,
28 0x3faf,
29 0x43b1,
30 {0x9e, 0x28, 0xbe, 0xb6, 0xfa, 0xb5, 0xec, 0xe7}};
31
32 namespace installer {
33
34 // This should be true for the period between the end of
35 // InitInstallerLogging() and the beginning of EndInstallerLogging().
36 bool installer_logging_ = false;
37
TruncateLogFileIfNeeded(const base::FilePath & log_file)38 TruncateResult TruncateLogFileIfNeeded(const base::FilePath& log_file) {
39 TruncateResult result = LOGFILE_UNTOUCHED;
40
41 int64_t log_size = 0;
42 if (base::GetFileSize(log_file, &log_size) &&
43 log_size > kMaxInstallerLogFileSize) {
44 // Cause the old log file to be deleted when we are done with it.
45 uint32_t file_flags = base::File::FLAG_OPEN | base::File::FLAG_READ |
46 base::File::FLAG_SHARE_DELETE |
47 base::File::FLAG_DELETE_ON_CLOSE;
48 base::File old_log_file(log_file, file_flags);
49
50 if (old_log_file.IsValid()) {
51 result = LOGFILE_DELETED;
52 base::FilePath tmp_log(log_file.value() + FILE_PATH_LITERAL(".tmp"));
53 // Note that base::Move will attempt to replace existing files.
54 if (base::Move(log_file, tmp_log)) {
55 int64_t offset = log_size - kTruncatedInstallerLogFileSize;
56 std::string old_log_data(kTruncatedInstallerLogFileSize, 0);
57 int bytes_read = old_log_file.Read(offset, &old_log_data[0],
58 kTruncatedInstallerLogFileSize);
59 if (bytes_read > 0 &&
60 (bytes_read ==
61 base::WriteFile(log_file, &old_log_data[0], bytes_read) ||
62 base::PathExists(log_file))) {
63 result = LOGFILE_TRUNCATED;
64 }
65 }
66 } else if (base::DeleteFile(log_file)) {
67 // Couldn't get sufficient access to the log file, optimistically try to
68 // delete it.
69 result = LOGFILE_DELETED;
70 }
71 }
72
73 return result;
74 }
75
InitInstallerLogging(const installer::InitialPreferences & prefs)76 void InitInstallerLogging(const installer::InitialPreferences& prefs) {
77 if (installer_logging_)
78 return;
79
80 installer_logging_ = true;
81
82 bool value = false;
83 if (prefs.GetBool(installer::initial_preferences::kDisableLogging, &value) &&
84 value) {
85 return;
86 }
87
88 base::FilePath log_file_path(GetLogFilePath(prefs));
89 TruncateLogFileIfNeeded(log_file_path);
90
91 logging::LoggingSettings settings;
92 settings.logging_dest = logging::LOG_TO_FILE;
93 settings.log_file_path = log_file_path.value().c_str();
94 logging::InitLogging(settings);
95
96 if (prefs.GetBool(installer::initial_preferences::kVerboseLogging, &value) &&
97 value) {
98 logging::SetMinLogLevel(logging::LOG_VERBOSE);
99 } else {
100 logging::SetMinLogLevel(logging::LOG_ERROR);
101 }
102
103 // Enable ETW logging.
104 logging::LogEventProvider::Initialize(kSetupTraceProvider);
105 }
106
EndInstallerLogging()107 void EndInstallerLogging() {
108 logging::CloseLogFile();
109
110 installer_logging_ = false;
111 }
112
GetLogFilePath(const installer::InitialPreferences & prefs)113 base::FilePath GetLogFilePath(const installer::InitialPreferences& prefs) {
114 std::string path;
115 prefs.GetString(installer::initial_preferences::kLogFile, &path);
116 if (!path.empty())
117 return base::FilePath(base::UTF8ToWide(path));
118
119 static const base::FilePath::CharType kLogFilename[] =
120 #if BUILDFLAG(GOOGLE_CHROME_BRANDING)
121 FILE_PATH_LITERAL("chrome_installer.log");
122 #else // BUILDFLAG(CHROMIUM_BRANDING)
123 FILE_PATH_LITERAL("chromium_installer.log");
124 #endif
125
126 // Fallback to current directory if getting the temp directory fails.
127 base::FilePath tmp_path;
128 ignore_result(base::PathService::Get(base::DIR_TEMP, &tmp_path));
129 return tmp_path.Append(kLogFilename);
130 }
131
132 } // namespace installer
133