1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "unclean_shutdown_collector.h"
18
19#include <base/files/file_util.h>
20#include <base/logging.h>
21
22static const char kUncleanShutdownFile[] =
23    "/var/lib/crash_reporter/pending_clean_shutdown";
24
25// Files created by power manager used for crash reporting.
26static const char kPowerdTracePath[] = "/var/lib/power_manager";
27// Presence of this file indicates that the system was suspended
28static const char kPowerdSuspended[] = "powerd_suspended";
29
30using base::FilePath;
31
32UncleanShutdownCollector::UncleanShutdownCollector()
33    : unclean_shutdown_file_(kUncleanShutdownFile),
34      powerd_trace_path_(kPowerdTracePath),
35      powerd_suspended_file_(powerd_trace_path_.Append(kPowerdSuspended)) {
36}
37
38UncleanShutdownCollector::~UncleanShutdownCollector() {
39}
40
41bool UncleanShutdownCollector::Enable() {
42  FilePath file_path(unclean_shutdown_file_);
43  base::CreateDirectory(file_path.DirName());
44  if (base::WriteFile(file_path, "", 0) != 0) {
45    LOG(ERROR) << "Unable to create shutdown check file";
46    return false;
47  }
48  return true;
49}
50
51bool UncleanShutdownCollector::DeleteUncleanShutdownFiles() {
52  if (!base::DeleteFile(FilePath(unclean_shutdown_file_), false)) {
53    LOG(ERROR) << "Failed to delete unclean shutdown file "
54               << unclean_shutdown_file_;
55    return false;
56  }
57  // Delete power manager state file if it exists.
58  base::DeleteFile(powerd_suspended_file_, false);
59  return true;
60}
61
62bool UncleanShutdownCollector::Collect() {
63  FilePath unclean_file_path(unclean_shutdown_file_);
64  if (!base::PathExists(unclean_file_path)) {
65    return false;
66  }
67  LOG(WARNING) << "Last shutdown was not clean";
68  if (DeadBatteryCausedUncleanShutdown()) {
69    DeleteUncleanShutdownFiles();
70    return false;
71  }
72  DeleteUncleanShutdownFiles();
73
74  if (is_feedback_allowed_function_()) {
75    count_crash_function_();
76  }
77  return true;
78}
79
80bool UncleanShutdownCollector::Disable() {
81  LOG(INFO) << "Clean shutdown signalled";
82  return DeleteUncleanShutdownFiles();
83}
84
85bool UncleanShutdownCollector::DeadBatteryCausedUncleanShutdown() {
86  // Check for case of battery running out while suspended.
87  if (base::PathExists(powerd_suspended_file_)) {
88    LOG(INFO) << "Unclean shutdown occurred while suspended. Not counting "
89              << "toward unclean shutdown statistic.";
90    return true;
91  }
92  return false;
93}
94