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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)
     11 ProcessEntry::ProcessEntry() : pid_(0), ppid_(0), gid_(0) {}
     12 ProcessEntry::ProcessEntry(const ProcessEntry& other) = default;
     13 ProcessEntry::~ProcessEntry() {}
     14 #endif
     15 
     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 
     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 
     34 bool ProcessIterator::IncludeEntry() {
     35   return !filter_ || filter_->Includes(entry_);
     36 }
     37 
     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 
     55 NamedProcessIterator::~NamedProcessIterator() {
     56 }
     57 
     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