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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 
8 namespace base {
9 
10 #if defined(OS_POSIX)
ProcessEntry()11 ProcessEntry::ProcessEntry() : pid_(0), ppid_(0), gid_(0) {}
12 ProcessEntry::ProcessEntry(const ProcessEntry& other) = default;
~ProcessEntry()13 ProcessEntry::~ProcessEntry() {}
14 #endif
15 
NextProcessEntry()16 const 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 
Snapshot()26 ProcessIterator::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 
IncludeEntry()34 bool ProcessIterator::IncludeEntry() {
35   return !filter_ || filter_->Includes(entry_);
36 }
37 
NamedProcessIterator(const FilePath::StringType & executable_name,const ProcessFilter * filter)38 NamedProcessIterator::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 
~NamedProcessIterator()55 NamedProcessIterator::~NamedProcessIterator() {
56 }
57 
GetProcessCount(const FilePath::StringType & executable_name,const ProcessFilter * filter)58 int 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