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      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 
     15 namespace {
     16 
     17 base::LazyInstance<std::string>::Leaky g_posix_client_id =
     18     LAZY_INSTANCE_INITIALIZER;
     19 base::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.
     23 const char kConsentToSendStats[] = "Consent To Send Stats";
     24 
     25 void 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
     40 bool 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
     60 bool 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.
     88 scoped_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.
    101 void 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
    120 int GoogleUpdateSettings::GetLastRunTime() {
    121   return -1;
    122 }
    123 
    124 // static
    125 bool GoogleUpdateSettings::SetLastRunTime() {
    126   return false;
    127 }
    128