lsb_release_log_source.cc revision 5e3f23d412006dc4db4e659864679f29341e113f 
1// Copyright (c) 2012 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/browser/chromeos/system_logs/lsb_release_log_source.h"
6
7#include <string>
8
9#include "base/bind.h"
10#include "base/bind_helpers.h"
11#include "base/file_util.h"
12#include "base/files/file_path.h"
13#include "base/logging.h"
14#include "base/strings/string_split.h"
15#include "base/strings/string_util.h"
16#include "content/public/browser/browser_thread.h"
17
18using content::BrowserThread;
19
20const char kInvalidLogEntry[] = "<invalid characters in log entry>";
21const char kEmptyLogEntry[] = "<no value>";
22
23namespace {
24
25typedef std::pair<std::string, std::string> KeyValuePair;
26
27}  // namespace
28
29namespace chromeos {
30
31void LsbReleaseLogSource::Fetch(const SysLogsSourceCallback& callback) {
32  DCHECK(!callback.is_null());
33
34  SystemLogsResponse* response = new SystemLogsResponse;
35  BrowserThread::PostBlockingPoolTaskAndReply(
36      FROM_HERE,
37      base::Bind(&LsbReleaseLogSource::ReadLSBRelease, response),
38      base::Bind(callback,
39                 base::Owned(response)));
40}
41
42void LsbReleaseLogSource::ReadLSBRelease(SystemLogsResponse* response) {
43  DCHECK(response);
44
45  const base::FilePath lsb_release_file("/etc/lsb-release");
46  std::string lsb_data;
47  bool read_success = file_util::ReadFileToString(lsb_release_file, &lsb_data);
48  // if we were using an internal temp file, the user does not need the
49  // logs to stay past the ReadFile call - delete the file
50  if (!read_success) {
51    LOG(ERROR) << "Can't access /etc/lsb-release file.";
52    return;
53  }
54  ParseLSBRelease(lsb_data, response);
55}
56
57void LsbReleaseLogSource::ParseLSBRelease(const std::string& lsb_data,
58                                          SystemLogsResponse* response) {
59  std::vector<KeyValuePair> pairs;
60  base::SplitStringIntoKeyValuePairs(lsb_data, '=', '\n', &pairs);
61  for (size_t i = 0; i  < pairs.size(); ++i) {
62    std::string key, value;
63    TrimWhitespaceASCII(pairs[i].first, TRIM_ALL, &key);
64    TrimWhitespaceASCII(pairs[i].second, TRIM_ALL, &value);
65
66    if (key.empty())
67      continue;
68    if (!IsStringUTF8(value) || !IsStringUTF8(key)) {
69      LOG(WARNING) << "Invalid characters in system log entry: " << key;
70      (*response)[key] = kInvalidLogEntry;
71      continue;
72    }
73
74    if (value.empty())
75      (*response)[key] = kEmptyLogEntry;
76    else
77      (*response)[key] = value;
78  }
79}
80
81}  // namespace chromeos
82
83