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