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

int
Iterator_Handler::spawn_viewer (void)
{
  char viewer[BUFSIZ];

  if (this->get_viewer (viewer,
                        sizeof viewer) != 0)
    ACE_ERROR_RETURN ((LM_ERROR,
                       ACE_TEXT ("Problem determining which external ")
                       ACE_TEXT ("viewer to use.\n")),
                      -1);

  // Set up the command line that will be used when spawning the
  // external viewer.
  ACE_Process_Options opts;
  opts.command_line (ACE_TEXT ("%s %s"),
                     viewer,
                     this->file_.get_path_name ());

  pid_t result = ACE_Process_Manager::instance ()->spawn (opts);

  switch (result)
    {
    case 0:
      // Child
      return 0;
    case ACE_INVALID_PID:
      ACE_ERROR_RETURN ((LM_ERROR,
                         ACE_TEXT ("Error during viewer spawn of %p\n"),
                         opts.command_line_buf ()),
                        -1);
    default:
      // Parent
      ACE_DEBUG ((LM_INFO,
                  ACE_TEXT ("Spawned viewer <%s> with PID <%d>.\n"),
                  viewer,
                  result));
      break;
    }

  return 0;
}

pid_t
ACE_Process::spawn (ACE_Process_Options &options)
{
  if (this->prepare (options) < 0)
    return ACE_INVALID_PID;

  // Stash the passed/duped handle sets away in this object for later
  // closing if needed or requested. At the same time, figure out which
  // ones to include in command line options if that's needed below.
  ACE_Handle_Set *set_p = 0;
  if (options.dup_handles (this->dup_handles_))
    set_p = &this->dup_handles_;
  else if (options.passed_handles (this->handles_passed_))
    set_p = &this->handles_passed_;

  // If we are going to end up running a new program (i.e. Win32, or
  // NO_EXEC option is set) then get any handles passed in the options,
  // and tack them onto the command line with +H <handle> options,
  // unless the command line runs out of space.
  // Note that we're using the knowledge that all the options, argvs, etc.
  // passed to the options are all sitting in the command_line_buf. Any
  // call to get the argv then splits them out. So, regardless of the
  // platform, tack them all onto the command line buf and take it
  // from there.
  if (set_p && !ACE_BIT_ENABLED (options.creation_flags (),
                                 ACE_Process_Options::NO_EXEC))
    {
      int maxlen = 0;
      ACE_TCHAR *cmd_line_buf = options.command_line_buf (&maxlen);
      size_t max_len = static_cast<size_t> (maxlen);
      size_t curr_len = ACE_OS::strlen (cmd_line_buf);
      ACE_Handle_Set_Iterator h_iter (*set_p);
      // Because the length of the to-be-formatted +H option is not
      // known, and we don't have a snprintf, guess at the space
      // needed (20 chars), and use that as a limit.
      for (ACE_HANDLE h = h_iter ();
           h != ACE_INVALID_HANDLE && curr_len + 20 < max_len;
           h = h_iter ())
        {
#if defined (ACE_WIN32)
# if defined (ACE_WIN64)
          curr_len += ACE_OS::sprintf (&cmd_line_buf[curr_len],
                                       ACE_TEXT (" +H %I64p"),
                                       h);
# else
          curr_len += ACE_OS::sprintf (&cmd_line_buf[curr_len],
                                       ACE_TEXT (" +H %p"),
                                       h);
# endif  /* ACE_WIN64 */
#else
          curr_len += ACE_OS::sprintf (&cmd_line_buf[curr_len],
                                       ACE_TEXT (" +H %d"),
                                       h);
#endif /* ACE_WIN32 */
        }
    }

#if defined (ACE_HAS_WINCE)
  // Note that WinCE does not have process name included in the command line as argv[0]
  // like other OS environment.  Therefore, it is user's whole responsibility to call
  // 'ACE_Process_Options::process_name(const ACE_TCHAR *name)' to set the proper
  // process name (the execution file name with path if needed).
  BOOL fork_result =
    ACE_TEXT_CreateProcess (options.process_name(),
                            options.command_line_buf(),
                            options.get_process_attributes(),  // must be NULL in CE
                            options.get_thread_attributes(),   // must be NULL in CE
                            options.handle_inheritance(),      // must be false in CE
                            options.creation_flags(),          // must be NULL in CE
                            options.env_buf(),                 // environment variables, must be NULL in CE
                            options.working_directory(),       // must be NULL in CE
                            options.startup_info(),            // must be NULL in CE
                            &this->process_info_);

  if (fork_result)
    {
      parent (this->getpid ());
      return this->getpid ();
    }
  return ACE_INVALID_PID;

#elif defined (ACE_WIN32)
  void* env_buf = options.env_buf ();
  DWORD flags = options.creation_flags ();
# if defined (ACE_HAS_WCHAR) && !defined (ACE_USES_WCHAR)
  wchar_t* wenv_buf = 0;
  if (options.use_unicode_environment ())
    {
      wenv_buf = this->convert_env_buffer (options.env_buf ());
      env_buf = wenv_buf;
      flags |= CREATE_UNICODE_ENVIRONMENT;
    }
# endif

  BOOL fork_result =
    ACE_TEXT_CreateProcess (0,
                            options.command_line_buf (),
                            options.get_process_attributes (),
                            options.get_thread_attributes (),
                            options.handle_inheritance (),
//.........这里部分代码省略.........

static pid_t
spawn_child (const ACE_TCHAR *argv0,
             ACE_Process_Manager &mgr,
             int sleep_time,
             int my_process_id)
{

#if defined (ACE_HAS_WINCE)
const ACE_TCHAR *cmdline_format = ACE_TEXT("%s %d");
#elif defined (ACE_WIN32)
const ACE_TCHAR *cmdline_format = ACE_TEXT("\"%s\" %s %d");
#elif !defined (ACE_USES_WCHAR)
const ACE_TCHAR *cmdline_format = ACE_TEXT (".") ACE_DIRECTORY_SEPARATOR_STR ACE_TEXT("%s %s %d");
#else
const ACE_TCHAR *cmdline_format = ACE_TEXT (".") ACE_DIRECTORY_SEPARATOR_STR ACE_TEXT("%ls %ls %d");
#endif
  ACE_Process_Options opts;

  ACE_TCHAR prio[64];
  ACE_TCHAR cmd[16];

  if (debug_test)
    ACE_OS::strcpy (cmd, ACE_TEXT ("-d"));
  else
    cmd[0] = ACE_TEXT ('\0');

#if defined (ACE_HAS_WIN32_PRIORITY_CLASS)
  if (my_process_id == 1)
    {
      opts.creation_flags (ABOVE_NORMAL_PRIORITY_CLASS);
      ACE_OS::snprintf (prio, 64, ACE_TEXT ("and priority 'above normal'"));
    }
  else if (my_process_id == 2)
    {
      opts.creation_flags (BELOW_NORMAL_PRIORITY_CLASS);
      ACE_OS::snprintf (prio, 64, ACE_TEXT ("and priority 'below normal'"));
    }
  else if (my_process_id == 3)
    {
      opts.creation_flags (IDLE_PRIORITY_CLASS);
      ACE_OS::snprintf (prio, 64, ACE_TEXT ("and priority 'idle'"));
    }
  else if (my_process_id == 4)
    {
      opts.creation_flags (HIGH_PRIORITY_CLASS);
      ACE_OS::snprintf (prio, 64, ACE_TEXT ("and priority 'high'"));
    }
  else if (my_process_id == 5)
    {
      opts.creation_flags (NORMAL_PRIORITY_CLASS);
      ACE_OS::snprintf (prio, 64, ACE_TEXT ("and priority 'normal'"));
    }
  else
    prio[0] = ACE_TEXT ('\0');

  ACE_TCHAR pd [16];
  ACE_OS::snprintf (pd, 16, ACE_TEXT (" -p %d"), my_process_id);
  ACE_OS::strcat (cmd, pd);
#else
  ACE_UNUSED_ARG (my_process_id);
  prio[0] = ACE_TEXT ('\0');
#endif

  opts.process_name (argv0);
#ifndef ACE_LACKS_VA_FUNCTIONS
  opts.command_line (cmdline_format,
#if !defined (ACE_HAS_WINCE)
                     argv0,
#endif /* !ACE_HAS_WINCE */
                     cmd,
                     sleep_time);
#else
  ACE_UNUSED_ARG (cmdline_format);
#endif /* ACE_LACKS_VA_FUNCTIONS */

  ACE_DEBUG ((LM_DEBUG, ACE_TEXT("Spawning <%s> <%s>\n"),
                        opts.process_name(),
                        opts.command_line_buf ()));

  pid_t result = mgr.spawn (opts);

  if (result != ACE_INVALID_PID)
    ACE_DEBUG ((LM_DEBUG,
                ACE_TEXT ("(%P) spawned child: pid %d time %d %s\n"),
                int (result), sleep_time, prio));
  else
    ACE_ERROR ((LM_ERROR, ACE_TEXT ("%p\n"), ACE_TEXT ("spawn failed")));

  return result;
}