1// Copyright (c) 2013 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 "base/process/process_iterator.h"
6#include "build/build_config.h"
7
8namespace base {
9
10#if defined(OS_POSIX)
11ProcessEntry::ProcessEntry() : pid_(0), ppid_(0), gid_(0) {}
12ProcessEntry::ProcessEntry(const ProcessEntry& other) = default;
13ProcessEntry::~ProcessEntry() {}
14#endif
15
16const ProcessEntry* ProcessIterator::NextProcessEntry() {
17  bool result = false;
18  do {
19    result = CheckForNextProcess();
20  } while (result && !IncludeEntry());
21  if (result)
22    return &entry_;
23  return NULL;
24}
25
26ProcessIterator::ProcessEntries ProcessIterator::Snapshot() {
27  ProcessEntries found;
28  while (const ProcessEntry* process_entry = NextProcessEntry()) {
29    found.push_back(*process_entry);
30  }
31  return found;
32}
33
34bool ProcessIterator::IncludeEntry() {
35  return !filter_ || filter_->Includes(entry_);
36}
37
38NamedProcessIterator::NamedProcessIterator(
39    const FilePath::StringType& executable_name,
40    const ProcessFilter* filter) : ProcessIterator(filter),
41                                   executable_name_(executable_name) {
42#if defined(OS_ANDROID)
43  // On Android, the process name contains only the last 15 characters, which
44  // is in file /proc/<pid>/stat, the string between open parenthesis and close
45  // parenthesis. Please See ProcessIterator::CheckForNextProcess for details.
46  // Now if the length of input process name is greater than 15, only save the
47  // last 15 characters.
48  if (executable_name_.size() > 15) {
49    executable_name_ = FilePath::StringType(executable_name_,
50                                            executable_name_.size() - 15, 15);
51  }
52#endif
53}
54
55NamedProcessIterator::~NamedProcessIterator() {
56}
57
58int GetProcessCount(const FilePath::StringType& executable_name,
59                    const ProcessFilter* filter) {
60  int count = 0;
61  NamedProcessIterator iter(executable_name, filter);
62  while (iter.NextProcessEntry())
63    ++count;
64  return count;
65}
66
67}  // namespace base
68