C++ ACE_Process_Options::avoid_zombies方法代码示例

Test::Process_ptr
Process_Factory::create_new_process (void)
{
  Startup_Callback *startup_callback_impl;
  ACE_NEW_THROW_EX (startup_callback_impl,
                    Startup_Callback,
                    CORBA::NO_MEMORY ());

  PortableServer::ServantBase_var owner_transfer(startup_callback_impl);

  CORBA::Object_var poa_object =
    this->orb_->resolve_initial_references("RootPOA");

  PortableServer::POA_var root_poa =
    PortableServer::POA::_narrow (poa_object.in ());

  PortableServer::ObjectId_var id =
    root_poa->activate_object (startup_callback_impl);

  CORBA::Object_var object = root_poa->id_to_reference (id.in ());

  Test::Startup_Callback_var startup_callback =
    Test::Startup_Callback::_narrow (object.in ());

  CORBA::String_var ior =
    this->orb_->object_to_string (startup_callback.in ());

  const ACE_TCHAR* argv[3] = {
    ACE_TEXT("child"),
    ACE_TEXT_CHAR_TO_TCHAR(ior.in ()),
    0};

  ACE_Process_Options options;
#if !defined(ACE_WIN32)
  options.avoid_zombies (1);
#endif /* ACE_WIN32 */
  options.command_line (argv);

  ACE_Process child_process;
  pid_t pid =
    child_process.spawn (options);

  if (pid == -1)
    {
      ACE_DEBUG ((LM_DEBUG,
                  "(%P|%t) Process_Factory::create_new_process, "
                  " spawn call failed (%d)\n",
                  ACE_ERRNO_GET));
      throw Test::Spawn_Failed ();
    }

  int process_has_started = 0;
  Test::Process_var the_process;
  for (int i = 0; i != 500 && !process_has_started; ++i)
    {
      ACE_Time_Value interval (0, 10000);
      this->orb_->perform_work (interval);

      process_has_started =
        startup_callback_impl->process_has_started (the_process.out ());
    }

  try
    {
      PortableServer::POA_var poa =
        startup_callback_impl->_default_POA ();
      PortableServer::ObjectId_var id =
        poa->servant_to_id (startup_callback_impl);
      poa->deactivate_object (id.in ());
    }
  catch (const CORBA::Exception&)
    {
    }

  if (process_has_started == 0)
    {
      ACE_DEBUG ((LM_DEBUG,
                  "(%P|%t) Process_Factory::create_new_process, "
                  " timeout while waiting for child\n"));
      (void) child_process.terminate ();
      throw Test::Spawn_Failed ();
    }

  return the_process._retn ();
}

//.........这里部分代码省略.........
  if (procenv)
    delete procenv;
# endif /* ACE_USES_WCHAR */

  // restore STD file descriptors (if necessary)
  if (options.get_stdin () != ACE_INVALID_HANDLE) {
    if (saved_stdin == -1)
      ACE_OS::close (ACE_STDIN);
    else
      ACE_OS::dup2 (saved_stdin, ACE_STDIN);
  }
  if (options.get_stdout () != ACE_INVALID_HANDLE) {
    if (saved_stdout == -1)
      ACE_OS::close (ACE_STDOUT);
    else
      ACE_OS::dup2 (saved_stdout, ACE_STDOUT);
  }
  if (options.get_stderr () != ACE_INVALID_HANDLE) {
    if (saved_stderr == -1)
      ACE_OS::close (ACE_STDERR);
    else
      ACE_OS::dup2 (saved_stderr, ACE_STDERR);
  }

  if (this->child_id_ == ACE_INVALID_PID)
    {
      errno = my_errno_;
    }

  return this->child_id_;
#else /* ACE_WIN32 */
  // Fork the new process.
  this->child_id_ = ACE::fork (options.process_name (),
                               options.avoid_zombies ());

  if (this->child_id_ == 0)
    {
# if !defined (ACE_LACKS_SETPGID)
      // If we're the child and the options specified a non-default
      // process group, try to set our pgid to it.  This allows the
      // <ACE_Process_Manager> to wait for processes by their
      // process-group.
      if (options.getgroup () != ACE_INVALID_PID
          && ACE_OS::setpgid (0,
                              options.getgroup ()) < 0)
        {
#if !defined (ACE_HAS_THREADS)
          // We can't emit this log message because ACE_ERROR(), etc.
          // will invoke async signal unsafe functions, which results
          // in undefined behavior in threaded programs.
          ACE_ERROR ((LM_ERROR,
                      ACE_TEXT ("%p.\n"),
                      ACE_TEXT ("ACE_Process::spawn: setpgid failed.")));
#endif
        }
# endif /* ACE_LACKS_SETPGID */

# if !defined (ACE_LACKS_SETREGID)
      if (options.getrgid () != (uid_t) -1
          || options.getegid () != (uid_t) -1)
        if (ACE_OS::setregid (options.getrgid (),
                              options.getegid ()) == -1)
          {
#if !defined (ACE_HAS_THREADS)
            // We can't emit this log message because ACE_ERROR(), etc.
            // will invoke async signal unsafe functions, which results