Exemple #1
0
void
mi_execute_command (char *cmd, int from_tty)
{
  struct mi_parse *command;
  struct captured_mi_execute_command_args args;
  struct ui_out *saved_uiout = uiout;

  /* This is to handle EOF (^D). We just quit gdb.  */
  /* FIXME: we should call some API function here.  */
  if (cmd == 0)
    quit_force (NULL, from_tty);

  command = mi_parse (cmd);

  if (command != NULL)
    {
      struct gdb_exception result;

      if (do_timings)
	{
	  command->cmd_start = (struct mi_timestamp *)
	    xmalloc (sizeof (struct mi_timestamp));
	  timestamp (command->cmd_start);
	}

      /* FIXME: cagney/1999-11-04: Can this use of catch_exceptions either
         be pushed even further down or even eliminated?  */
      args.command = command;
      result = catch_exception (uiout, captured_mi_execute_command, &args,
				RETURN_MASK_ALL);
      exception_print (gdb_stderr, result);

      if (args.action == EXECUTE_COMMAND_SUPRESS_PROMPT)
	{
	  /* The command is executing synchronously.  Bail out early
	     suppressing the finished prompt.  */
	  mi_parse_free (command);
	  return;
	}
      if (result.reason < 0)
	{
	  /* The command execution failed and error() was called
	     somewhere.  */
	  fputs_unfiltered (command->token, raw_stdout);
	  fputs_unfiltered ("^error,msg=\"", raw_stdout);
	  if (result.message == NULL)
	    fputs_unfiltered ("unknown error", raw_stdout);
	  else
	      fputstr_unfiltered (result.message, '"', raw_stdout);
	  fputs_unfiltered ("\"\n", raw_stdout);
	  mi_out_rewind (uiout);
	}
      mi_parse_free (command);
    }

  fputs_unfiltered ("(gdb) \n", raw_stdout);
  gdb_flush (raw_stdout);
  /* Print any buffered hook code.  */
  /* ..... */
}
Exemple #2
0
void
quit_command (char *args, int from_tty)
{
  if (!quit_confirm ())
    error (_("Not confirmed."));

  disconnect_tracing (from_tty);

  quit_force (args, from_tty);
}
Exemple #3
0
enum mi_cmd_result
mi_cmd_gdb_exit (char *command, char **argv, int argc)
{
  /* We have to print everything right here because we never return */
  if (last_async_command)
    fputs_unfiltered (last_async_command, raw_stdout);
  fputs_unfiltered ("^exit\n", raw_stdout);
  mi_out_put (uiout, raw_stdout);
  /* FIXME: The function called is not yet a formal libgdb function */
  quit_force (NULL, FROM_TTY);
  return MI_CMD_DONE;
}
Exemple #4
0
void
mi_execute_command (char *cmd, int from_tty)
{
  struct mi_parse *command;
  struct captured_mi_execute_command_args args;
  struct ui_out *saved_uiout = uiout;
  int result;

  /* This is to handle EOF (^D). We just quit gdb. */
  /* FIXME: we should call some API function here. */
  if (cmd == 0)
    quit_force (NULL, from_tty);

  command = mi_parse (cmd);

  if (command != NULL)
    {
      /* FIXME: cagney/1999-11-04: Can this use of catch_exceptions either
         be pushed even further down or even eliminated? */
      args.command = command;
      result = catch_exceptions (uiout, captured_mi_execute_command, &args, "",
				 RETURN_MASK_ALL);

      if (args.action == EXECUTE_COMMAND_SUPRESS_PROMPT)
	{
	  /* The command is executing synchronously.  Bail out early
	     suppressing the finished prompt. */
	  mi_parse_free (command);
	  return;
	}
      if (args.action == EXECUTE_COMMAND_DISPLAY_ERROR || result < 0)
	{
	  char *msg = error_last_message ();
	  struct cleanup *cleanup = make_cleanup (xfree, msg);
	  /* The command execution failed and error() was called
	     somewhere */
	  fputs_unfiltered (command->token, raw_stdout);
	  fputs_unfiltered ("^error,msg=\"", raw_stdout);
	  fputstr_unfiltered (msg, '"', raw_stdout);
	  fputs_unfiltered ("\"\n", raw_stdout);
	}
      mi_parse_free (command);
    }

  fputs_unfiltered ("(gdb) \n", raw_stdout);
  gdb_flush (raw_stdout);
  /* print any buffered hook code */
  /* ..... */
}
Exemple #5
0
/* Quit GDB if SIGTERM is received.
   GDB would quit anyway, but this way it will clean up properly.  */
void
handle_sigterm (int sig)
{
  signal (sig, handle_sigterm);
  quit_force ((char *) 0, stdin == instream);
}
Exemple #6
0
static void
async_sigterm_handler (gdb_client_data arg)
{
  quit_force (NULL, 0);
}
Exemple #7
0
static void
async_sigterm_handler (gdb_client_data arg)
{
  quit_force (NULL, stdin == instream);
}
Exemple #8
0
static int
captured_main (void *data)
{
  struct captured_main_args *context = data;
  int argc = context->argc;
  char **argv = context->argv;
  int count;
  static int quiet = 0;
  static int batch = 0;
  static int set_args = 0;
  static int already_initialized = 0;

  /* Pointers to various arguments from command line.  */
  char *symarg = NULL;
  char *execarg = NULL;
  char *corearg = NULL;
  char *cdarg = NULL;
  char *ttyarg = NULL;

  /* These are static so that we can take their address in an initializer.  */
  static int print_help;
  static int print_version;

  /* Pointers to all arguments of --command option.  */
  struct cmdarg {
    enum {
      CMDARG_FILE,
      CMDARG_COMMAND
    } type;
    char *string;
  } *cmdarg;
  /* Allocated size of cmdarg.  */
  int cmdsize;
  /* Number of elements of cmdarg used.  */
  int ncmd;

  /* Indices of all arguments of --directory option.  */
  char **dirarg;
  /* Allocated size.  */
  int dirsize;
  /* Number of elements used.  */
  int ndir;

  struct stat homebuf, cwdbuf;
  char *homedir;

  int i;

  long time_at_startup = get_run_time ();

#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
  setlocale (LC_MESSAGES, "");
#endif
#if defined (HAVE_SETLOCALE)
  setlocale (LC_CTYPE, "");
#endif
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

#ifdef HAVE_SBRK
  lim_at_start = (char *) sbrk (0);
#endif

#if defined (ALIGN_STACK_ON_STARTUP)
  i = (int) &count & 0x3;
  if (i != 0)
    alloca (4 - i);
#endif

  /* (TiEmu 20050514 Kevin Kofler) Skip all these in case of a restart. */
  cmdsize = 1;
  cmdarg = (struct cmdarg *) xmalloc (cmdsize * sizeof (*cmdarg));
  ncmd = 0;
  dirsize = 1;
  dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
  ndir = 0;

  quit_flag = 0;
  line = (char *) xmalloc (linesize);
  line[0] = '\0';		/* Terminate saved (now empty) cmd line */
  if (already_initialized)
    {
      /* (TiEmu 20050512 Kevin Kofler) Reinitialize Insight in case of a restart. */
      gdbtk_started = 0;
      gdbtk_disable_fputs = 1;
    }
  else
  {
  instream = stdin;

  getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
  current_directory = gdb_dirbuf;

  gdb_stdout = stdio_fileopen (stdout);
  gdb_stderr = stdio_fileopen (stderr);
  gdb_stdlog = gdb_stderr;	/* for moment */
  gdb_stdtarg = gdb_stderr;	/* for moment */
  gdb_stdin = stdio_fileopen (stdin);
  gdb_stdtargerr = gdb_stderr;	/* for moment */
  gdb_stdtargin = gdb_stdin;	/* for moment */

  /* Set the sysroot path.  */
#ifdef TARGET_SYSTEM_ROOT_RELOCATABLE
  gdb_sysroot = make_relative_prefix (argv[0], BINDIR, TARGET_SYSTEM_ROOT);
  if (gdb_sysroot)
    {
      struct stat s;
      int res = 0;

      if (stat (gdb_sysroot, &s) == 0)
	if (S_ISDIR (s.st_mode))
	  res = 1;

      if (res == 0)
	{
	  xfree (gdb_sysroot);
	  gdb_sysroot = TARGET_SYSTEM_ROOT;
	}
    }
  else
    gdb_sysroot = TARGET_SYSTEM_ROOT;
#else
#if defined (TARGET_SYSTEM_ROOT)
  gdb_sysroot = TARGET_SYSTEM_ROOT;
#else
  gdb_sysroot = "";
#endif
#endif

  /* There will always be an interpreter.  Either the one passed into
     this captured main, or one specified by the user at start up, or
     the console.  Initialize the interpreter to the one requested by 
     the application.  */
  interpreter_p = xstrdup (context->interpreter_p);

  /* Parse arguments and options.  */
  {
    int c;
    /* When var field is 0, use flag field to record the equivalent
       short option (or arbitrary numbers starting at 10 for those
       with no equivalent).  */
    enum {
      OPT_SE = 10,
      OPT_CD,
      OPT_ANNOTATE,
      OPT_STATISTICS,
      OPT_TUI,
      OPT_NOWINDOWS,
      OPT_WINDOWS
    };
    static struct option long_options[] =
    {
#if defined(TUI)
      {"tui", no_argument, 0, OPT_TUI},
#endif
      {"xdb", no_argument, &xdb_commands, 1},
      {"dbx", no_argument, &dbx_commands, 1},
      {"readnow", no_argument, &readnow_symbol_files, 1},
      {"r", no_argument, &readnow_symbol_files, 1},
      {"quiet", no_argument, &quiet, 1},
      {"q", no_argument, &quiet, 1},
      {"silent", no_argument, &quiet, 1},
      {"nx", no_argument, &inhibit_gdbinit, 1},
      {"n", no_argument, &inhibit_gdbinit, 1},
      {"batch-silent", no_argument, 0, 'B'},
      {"batch", no_argument, &batch, 1},
      {"epoch", no_argument, &epoch_interface, 1},

    /* This is a synonym for "--annotate=1".  --annotate is now preferred,
       but keep this here for a long time because people will be running
       emacses which use --fullname.  */
      {"fullname", no_argument, 0, 'f'},
      {"f", no_argument, 0, 'f'},

      {"annotate", required_argument, 0, OPT_ANNOTATE},
      {"help", no_argument, &print_help, 1},
      {"se", required_argument, 0, OPT_SE},
      {"symbols", required_argument, 0, 's'},
      {"s", required_argument, 0, 's'},
      {"exec", required_argument, 0, 'e'},
      {"e", required_argument, 0, 'e'},
      {"core", required_argument, 0, 'c'},
      {"c", required_argument, 0, 'c'},
      {"pid", required_argument, 0, 'p'},
      {"p", required_argument, 0, 'p'},
      {"command", required_argument, 0, 'x'},
      {"eval-command", required_argument, 0, 'X'},
      {"version", no_argument, &print_version, 1},
      {"x", required_argument, 0, 'x'},
      {"ex", required_argument, 0, 'X'},
#ifdef GDBTK
      {"tclcommand", required_argument, 0, 'z'},
      {"enable-external-editor", no_argument, 0, 'y'},
      {"editor-command", required_argument, 0, 'w'},
#endif
      {"ui", required_argument, 0, 'i'},
      {"interpreter", required_argument, 0, 'i'},
      {"i", required_argument, 0, 'i'},
      {"directory", required_argument, 0, 'd'},
      {"d", required_argument, 0, 'd'},
      {"cd", required_argument, 0, OPT_CD},
      {"tty", required_argument, 0, 't'},
      {"baud", required_argument, 0, 'b'},
      {"b", required_argument, 0, 'b'},
      {"nw", no_argument, NULL, OPT_NOWINDOWS},
      {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
      {"w", no_argument, NULL, OPT_WINDOWS},
      {"windows", no_argument, NULL, OPT_WINDOWS},
      {"statistics", no_argument, 0, OPT_STATISTICS},
      {"write", no_argument, &write_files, 1},
      {"args", no_argument, &set_args, 1},
     {"l", required_argument, 0, 'l'},
      {"return-child-result", no_argument, &return_child_result, 1},
      {0, no_argument, 0, 0}
    };

    while (1)
      {
	int option_index;

	c = getopt_long_only (argc, argv, "",
			      long_options, &option_index);
	if (c == EOF || set_args)
	  break;

	/* Long option that takes an argument.  */
	if (c == 0 && long_options[option_index].flag == 0)
	  c = long_options[option_index].val;

	switch (c)
	  {
	  case 0:
	    /* Long option that just sets a flag.  */
	    break;
	  case OPT_SE:
	    symarg = optarg;
	    execarg = optarg;
	    break;
	  case OPT_CD:
	    cdarg = optarg;
	    break;
	  case OPT_ANNOTATE:
	    /* FIXME: what if the syntax is wrong (e.g. not digits)?  */
	    annotation_level = atoi (optarg);
	    break;
	  case OPT_STATISTICS:
	    /* Enable the display of both time and space usage.  */
	    display_time = 1;
	    display_space = 1;
	    break;
	  case OPT_TUI:
	    /* --tui is equivalent to -i=tui.  */
	    xfree (interpreter_p);
	    interpreter_p = xstrdup (INTERP_TUI);
	    break;
	  case OPT_WINDOWS:
	    /* FIXME: cagney/2003-03-01: Not sure if this option is
               actually useful, and if it is, what it should do.  */
#ifdef GDBTK
	    /* --windows is equivalent to -i=insight.  */
	    xfree (interpreter_p);
	    interpreter_p = xstrdup (INTERP_INSIGHT);
#endif
	    use_windows = 1;
	    break;
	  case OPT_NOWINDOWS:
	    /* -nw is equivalent to -i=console.  */
	    xfree (interpreter_p);
	    interpreter_p = xstrdup (INTERP_CONSOLE);
	    use_windows = 0;
	    break;
	  case 'f':
	    annotation_level = 1;
/* We have probably been invoked from emacs.  Disable window interface.  */
	    use_windows = 0;
	    break;
	  case 's':
	    symarg = optarg;
	    break;
	  case 'e':
	    execarg = optarg;
	    break;
	  case 'c':
	    corearg = optarg;
	    break;
	  case 'p':
	    /* "corearg" is shared by "--core" and "--pid" */
	    corearg = optarg;
	    break;
	  case 'x':
	    cmdarg[ncmd].type = CMDARG_FILE;
	    cmdarg[ncmd++].string = optarg;
	    if (ncmd >= cmdsize)
	      {
		cmdsize *= 2;
		cmdarg = xrealloc ((char *) cmdarg,
				   cmdsize * sizeof (*cmdarg));
	      }
	    break;
	  case 'X':
	    cmdarg[ncmd].type = CMDARG_COMMAND;
	    cmdarg[ncmd++].string = optarg;
	    if (ncmd >= cmdsize)
	      {
		cmdsize *= 2;
		cmdarg = xrealloc ((char *) cmdarg,
				   cmdsize * sizeof (*cmdarg));
	      }
	    break;
	  case 'B':
	    batch = batch_silent = 1;
	    gdb_stdout = ui_file_new();
	    break;
#ifdef GDBTK
	  case 'z':
	    {
extern int gdbtk_test (char *);
	      if (!gdbtk_test (optarg))
		{
		  fprintf_unfiltered (gdb_stderr, _("%s: unable to load tclcommand file \"%s\""),
				      argv[0], optarg);
		  exit (1);
		}
	      break;
	    }
	  case 'y':
	    /* Backwards compatibility only.  */
	    break;
	  case 'w':
	    {
	      external_editor_command = xstrdup (optarg);
	      break;
	    }
#endif /* GDBTK */
	  case 'i':
	    xfree (interpreter_p);
	    interpreter_p = xstrdup (optarg);
	    break;
	  case 'd':
	    dirarg[ndir++] = optarg;
	    if (ndir >= dirsize)
	      {
		dirsize *= 2;
		dirarg = (char **) xrealloc ((char *) dirarg,
					     dirsize * sizeof (*dirarg));
	      }
	    break;
	  case 't':
	    ttyarg = optarg;
	    break;
	  case 'q':
	    quiet = 1;
	    break;
	  case 'b':
	    {
	      int i;
	      char *p;

	      i = strtol (optarg, &p, 0);
	      if (i == 0 && p == optarg)

		/* Don't use *_filtered or warning() (which relies on
		   current_target) until after initialize_all_files(). */

		fprintf_unfiltered
		  (gdb_stderr,
		   _("warning: could not set baud rate to `%s'.\n"), optarg);
	      else
		baud_rate = i;
	    }
            break;
	  case 'l':
	    {
	      int i;
	      char *p;

	      i = strtol (optarg, &p, 0);
	      if (i == 0 && p == optarg)

		/* Don't use *_filtered or warning() (which relies on
		   current_target) until after initialize_all_files(). */

		fprintf_unfiltered
		  (gdb_stderr,
		 _("warning: could not set timeout limit to `%s'.\n"), optarg);
	      else
		remote_timeout = i;
	    }
	    break;

	  case '?':
	    fprintf_unfiltered (gdb_stderr,
			_("Use `%s --help' for a complete list of options.\n"),
				argv[0]);
	    exit (1);
	  }
      }

    /* If --help or --version, disable window interface.  */
    if (print_help || print_version)
      {
	use_windows = 0;
      }

    if (set_args)
      {
	/* The remaining options are the command-line options for the
	   inferior.  The first one is the sym/exec file, and the rest
	   are arguments.  */
	if (optind >= argc)
	  {
	    fprintf_unfiltered (gdb_stderr,
				_("%s: `--args' specified but no program specified\n"),
				argv[0]);
	    exit (1);
	  }
	symarg = argv[optind];
	execarg = argv[optind];
	++optind;
	set_inferior_args_vector (argc - optind, &argv[optind]);
      }
    else
      {
	/* OK, that's all the options.  The other arguments are filenames.  */
	count = 0;
	for (; optind < argc; optind++)
	  switch (++count)
	    {
	    case 1:
	      symarg = argv[optind];
	      execarg = argv[optind];
	      break;
	    case 2:
	      /* The documentation says this can be a "ProcID" as well. 
	         We will try it as both a corefile and a pid.  */
	      corearg = argv[optind];
	      break;
	    case 3:
	      fprintf_unfiltered (gdb_stderr,
				  _("Excess command line arguments ignored. (%s%s)\n"),
				  argv[optind], (optind == argc - 1) ? "" : " ...");
	      break;
	    }
      }
    if (batch)
      quiet = 1;
  }

  /* Initialize all files.  Give the interpreter a chance to take
     control of the console via the deprecated_init_ui_hook ().  */
  gdb_init (argv[0]);
    already_initialized = 1;
  }

  /* Do these (and anything which might call wrap_here or *_filtered)
     after initialize_all_files() but before the interpreter has been
     installed.  Otherwize the help/version messages will be eaten by
     the interpreter's output handler.  */

  if (print_version)
    {
      print_gdb_version (gdb_stdout);
      wrap_here ("");
      printf_filtered ("\n");
      exit (0);
    }

  if (print_help)
    {
      print_gdb_help (gdb_stdout);
      fputs_unfiltered ("\n", gdb_stdout);
      exit (0);
    }

  /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
     GDB retain the old MI1 interpreter startup behavior.  Output the
     copyright message before the interpreter is installed.  That way
     it isn't encapsulated in MI output.  */
  if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
    {
      /* Print all the junk at the top, with trailing "..." if we are about
         to read a symbol file (possibly slowly).  */
      print_gdb_version (gdb_stdout);
      if (symarg)
	printf_filtered ("..");
      wrap_here ("");
      printf_filtered ("\n");
      gdb_flush (gdb_stdout);	/* Force to screen during slow operations */
    }


  /* Install the default UI.  All the interpreters should have had a
     look at things by now.  Initialize the default interpreter. */

  {
    /* Find it.  */
    struct interp *interp = interp_lookup (interpreter_p);
    if (interp == NULL)
      error (_("Interpreter `%s' unrecognized"), interpreter_p);
    /* Install it.  */
    if (!interp_set (interp))
      {
        fprintf_unfiltered (gdb_stderr,
			    "Interpreter `%s' failed to initialize.\n",
                            interpreter_p);
        exit (1);
      }
  }

  /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
     GDB retain the old MI1 interpreter startup behavior.  Output the
     copyright message after the interpreter is installed when it is
     any sane interpreter.  */
  if (!quiet && !current_interp_named_p (INTERP_MI1))
    {
      /* Print all the junk at the top, with trailing "..." if we are about
         to read a symbol file (possibly slowly).  */
      print_gdb_version (gdb_stdout);
      if (symarg)
	printf_filtered ("..");
      wrap_here ("");
      printf_filtered ("\n");
      gdb_flush (gdb_stdout);	/* Force to screen during slow operations */
    }

  /* Set off error and warning messages with a blank line.  */
  error_pre_print = "\n";
  quit_pre_print = error_pre_print;
  warning_pre_print = _("\nwarning: ");

  /* Read and execute $HOME/.gdbinit file, if it exists.  This is done
     *before* all the command line arguments are processed; it sets
     global parameters, which are independent of what file you are
     debugging or what directory you are in.  */
  homedir = getenv ("HOME");
  if (homedir)
    {
      char *homeinit = xstrprintf ("%s/%s", homedir, gdbinit);

      if (!inhibit_gdbinit)
	{
	  catch_command_errors (source_script, homeinit, 0, RETURN_MASK_ALL);
	}

      /* Do stats; no need to do them elsewhere since we'll only
         need them if homedir is set.  Make sure that they are
         zero in case one of them fails (this guarantees that they
         won't match if either exists).  */

      memset (&homebuf, 0, sizeof (struct stat));
      memset (&cwdbuf, 0, sizeof (struct stat));

      stat (homeinit, &homebuf);
      stat (gdbinit, &cwdbuf);	/* We'll only need this if
				   homedir was set.  */
      xfree (homeinit);
    }

  /* Now perform all the actions indicated by the arguments.  */
  if (cdarg != NULL)
    {
      catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);
    }

  for (i = 0; i < ndir; i++)
    catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL);
  xfree (dirarg);

  if (execarg != NULL
      && symarg != NULL
      && strcmp (execarg, symarg) == 0)
    {
      /* The exec file and the symbol-file are the same.  If we can't
         open it, better only print one error message.
         catch_command_errors returns non-zero on success! */
      if (catch_command_errors (exec_file_attach, execarg, !batch, RETURN_MASK_ALL))
	catch_command_errors (symbol_file_add_main, symarg, 0, RETURN_MASK_ALL);
    }
  else
    {
      if (execarg != NULL)
	catch_command_errors (exec_file_attach, execarg, !batch, RETURN_MASK_ALL);
      if (symarg != NULL)
	catch_command_errors (symbol_file_add_main, symarg, 0, RETURN_MASK_ALL);
    }

  if (corearg != NULL)
    {
      /* corearg may be either a corefile or a pid.
	 If its first character is a digit, try attach first
	 and then corefile.  Otherwise try corefile first. */

      if (isdigit (corearg[0]))
	{
	  if (catch_command_errors (attach_command, corearg, 
				    !batch, RETURN_MASK_ALL) == 0)
	    catch_command_errors (core_file_command, corearg, 
				  !batch, RETURN_MASK_ALL);
	}
      else /* Can't be a pid, better be a corefile. */
	catch_command_errors (core_file_command, corearg, 
			      !batch, RETURN_MASK_ALL);
    }

  if (ttyarg != NULL)
    catch_command_errors (tty_command, ttyarg, !batch, RETURN_MASK_ALL);

  /* Error messages should no longer be distinguished with extra output. */
  error_pre_print = NULL;
  quit_pre_print = NULL;
  warning_pre_print = _("warning: ");

  /* Read the .gdbinit file in the current directory, *if* it isn't
     the same as the $HOME/.gdbinit file (it should exist, also).  */

  if (!homedir
      || memcmp ((char *) &homebuf, (char *) &cwdbuf, sizeof (struct stat)))
    if (!inhibit_gdbinit)
      {
	catch_command_errors (source_script, gdbinit, 0, RETURN_MASK_ALL);
      }

  for (i = 0; i < ncmd; i++)
    {
#if 0
      /* NOTE: cagney/1999-11-03: SET_TOP_LEVEL() was a macro that
         expanded into a call to setjmp().  */
      if (!SET_TOP_LEVEL ()) /* NB: This is #if 0'd out */
	{
	  /* NOTE: I am commenting this out, because it is not clear
	     where this feature is used. It is very old and
	     undocumented. ezannoni: 1999-05-04 */
#if 0
	  if (cmdarg[i][0] == '-' && cmdarg[i][1] == '\0')
	    read_command_file (stdin);
	  else
#endif
	    source_script (cmdarg[i], !batch);
	  do_cleanups (ALL_CLEANUPS);
	}
#endif
      if (cmdarg[i].type == CMDARG_FILE)
        catch_command_errors (source_script, cmdarg[i].string,
			      !batch, RETURN_MASK_ALL);
      else  /* cmdarg[i].type == CMDARG_COMMAND */
        catch_command_errors (execute_command, cmdarg[i].string,
			      !batch, RETURN_MASK_ALL);
    }
  xfree (cmdarg);

  /* Read in the old history after all the command files have been read. */
  init_history ();

  if (batch)
    {
      /* We have hit the end of the batch file.  */
      quit_force (NULL, 0);
    }

  /* Do any host- or target-specific hacks.  This is used for i960 targets
     to force the user to set a nindy target and spec its parameters.  */

#ifdef BEFORE_MAIN_LOOP_HOOK
  BEFORE_MAIN_LOOP_HOOK;
#endif

  /* Show time and/or space usage.  */

  if (display_time)
    {
      long init_time = get_run_time () - time_at_startup;

      printf_unfiltered (_("Startup time: %ld.%06ld\n"),
			 init_time / 1000000, init_time % 1000000);
    }

  if (display_space)
    {
#ifdef HAVE_SBRK
      extern char **environ;
      char *lim = (char *) sbrk (0);

      printf_unfiltered (_("Startup size: data size %ld\n"),
			 (long) (lim - (char *) &environ));
#endif
    }

#if 0
  /* FIXME: cagney/1999-11-06: The original main loop was like: */
  while (1)
    {
      if (!SET_TOP_LEVEL ())
	{
	  do_cleanups (ALL_CLEANUPS);	/* Do complete cleanup */
	  /* GUIs generally have their own command loop, mainloop, or
	     whatever.  This is a good place to gain control because
	     many error conditions will end up here via longjmp().  */
	  if (deprecated_command_loop_hook)
	    deprecated_command_loop_hook ();
	  else
	    deprecated_command_loop ();
	  quit_command ((char *) 0, instream == stdin);
	}
    }
  /* NOTE: If the command_loop() returned normally, the loop would
     attempt to exit by calling the function quit_command().  That
     function would either call exit() or throw an error returning
     control to SET_TOP_LEVEL. */
  /* NOTE: The function do_cleanups() was called once each time round
     the loop.  The usefulness of the call isn't clear.  If an error
     was thrown, everything would have already been cleaned up.  If
     command_loop() returned normally and quit_command() was called,
     either exit() or error() (again cleaning up) would be called. */
#endif
  /* NOTE: cagney/1999-11-07: There is probably no reason for not
     moving this loop and the code found in captured_command_loop()
     into the command_loop() proper.  The main thing holding back that
     change - SET_TOP_LEVEL() - has been eliminated. */
  while (1)
    {
      catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
    }
  /* No exit -- exit is through quit_command.  */
}