base/process/process_iterator.cc

   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
   7 namespace base {
   8
   9 #if defined(OS_POSIX)
  10 ProcessEntry::ProcessEntry() : pid_(0), ppid_(0), gid_(0) {}
  11 ProcessEntry::~ProcessEntry() {}
  12 #endif
  13
  14 const 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
  24 ProcessIterator::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
  32 bool ProcessIterator::IncludeEntry() {
  33   return !filter_ || filter_->Includes(entry_);
  34 }
  35
  36 NamedProcessIterator::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
  53 NamedProcessIterator::~NamedProcessIterator() {
  54 }
  55
  56 int 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