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/google_update_settings.h"
6
7#include "base/files/file_util.h"
8#include "base/lazy_instance.h"
9#include "base/path_service.h"
10#include "base/strings/string_util.h"
11#include "base/strings/utf_string_conversions.h"
12#include "base/synchronization/lock.h"
13#include "chrome/common/chrome_paths.h"
14
15namespace {
16
17base::LazyInstance<std::string>::Leaky g_posix_client_id =
18    LAZY_INSTANCE_INITIALIZER;
19base::LazyInstance<base::Lock>::Leaky g_posix_client_id_lock =
20    LAZY_INSTANCE_INITIALIZER;
21
22// File name used in the user data dir to indicate consent.
23const char kConsentToSendStats[] = "Consent To Send Stats";
24
25void SetConsentFilePermissionIfNeeded(const base::FilePath& consent_file) {
26#if defined(OS_CHROMEOS)
27  // The consent file needs to be world readable. See http://crbug.com/383003
28  int permissions;
29  if (base::GetPosixFilePermissions(consent_file, &permissions) &&
30      (permissions & base::FILE_PERMISSION_READ_BY_OTHERS) == 0) {
31    permissions |= base::FILE_PERMISSION_READ_BY_OTHERS;
32    base::SetPosixFilePermissions(consent_file, permissions);
33  }
34#endif
35}
36
37}  // namespace
38
39// static
40bool GoogleUpdateSettings::GetCollectStatsConsent() {
41  base::FilePath consent_file;
42  PathService::Get(chrome::DIR_USER_DATA, &consent_file);
43  consent_file = consent_file.Append(kConsentToSendStats);
44
45  if (!base::DirectoryExists(consent_file.DirName()))
46    return false;
47
48  std::string tmp_guid;
49  bool consented = base::ReadFileToString(consent_file, &tmp_guid);
50  if (consented) {
51    SetConsentFilePermissionIfNeeded(consent_file);
52
53    base::AutoLock lock(g_posix_client_id_lock.Get());
54    g_posix_client_id.Get().assign(tmp_guid);
55  }
56  return consented;
57}
58
59// static
60bool GoogleUpdateSettings::SetCollectStatsConsent(bool consented) {
61  base::FilePath consent_dir;
62  PathService::Get(chrome::DIR_USER_DATA, &consent_dir);
63  if (!base::DirectoryExists(consent_dir))
64    return false;
65
66  base::AutoLock lock(g_posix_client_id_lock.Get());
67
68  base::FilePath consent_file = consent_dir.AppendASCII(kConsentToSendStats);
69  if (!consented) {
70    g_posix_client_id.Get().clear();
71    return base::DeleteFile(consent_file, false);
72  }
73
74  const std::string& client_id = g_posix_client_id.Get();
75  if (base::PathExists(consent_file) && client_id.empty())
76    return true;
77
78  int size = client_id.size();
79  bool write_success =
80      base::WriteFile(consent_file, client_id.c_str(), size) == size;
81  if (write_success)
82    SetConsentFilePermissionIfNeeded(consent_file);
83  return write_success;
84}
85
86// static
87// TODO(gab): Implement storing/loading for all ClientInfo fields on POSIX.
88scoped_ptr<metrics::ClientInfo> GoogleUpdateSettings::LoadMetricsClientInfo() {
89  scoped_ptr<metrics::ClientInfo> client_info(new metrics::ClientInfo);
90
91  base::AutoLock lock(g_posix_client_id_lock.Get());
92  if (g_posix_client_id.Get().empty())
93    return scoped_ptr<metrics::ClientInfo>();
94  client_info->client_id = g_posix_client_id.Get();
95
96  return client_info.Pass();
97}
98
99// static
100// TODO(gab): Implement storing/loading for all ClientInfo fields on POSIX.
101void GoogleUpdateSettings::StoreMetricsClientInfo(
102    const metrics::ClientInfo& client_info) {
103  // Make sure that user has consented to send crashes.
104  if (!GoogleUpdateSettings::GetCollectStatsConsent())
105    return;
106
107  {
108    // Since user has consented, write the metrics id to the file.
109    base::AutoLock lock(g_posix_client_id_lock.Get());
110    g_posix_client_id.Get() = client_info.client_id;
111  }
112  GoogleUpdateSettings::SetCollectStatsConsent(true);
113}
114
115// GetLastRunTime and SetLastRunTime are not implemented for posix. Their
116// current return values signal failure which the caller is designed to
117// handle.
118
119// static
120int GoogleUpdateSettings::GetLastRunTime() {
121  return -1;
122}
123
124// static
125bool GoogleUpdateSettings::SetLastRunTime() {
126  return false;
127}
128