text: /*
   * $Id: dialog.c,v 1.193 2011/06/29 09:10:56 tom Exp $
   *
   *  cdialog - Display simple dialog boxes from shell scripts
   *
   *  Copyright 2000-2010,2011	Thomas E. Dickey
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU Lesser General Public License, version 2.1
   *  as published by the Free Software Foundation.
   *
   *  This program is distributed in the hope that it will be useful, but
   *  WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   *  Lesser General Public License for more details.
   *
   *  You should have received a copy of the GNU Lesser General Public
   *  License along with this program; if not, write to
   *	Free Software Foundation, Inc.
   *	51 Franklin St., Fifth Floor
   *	Boston, MA 02110, USA.
   *
   *  An earlier version of this program lists as authors
   *	Savio Lam (lam836@cs.cuhk.hk)
   */
  
  #include <dialog.h>
  #include <string.h>
  #include <sys/types.h>
  #include <sys/stat.h>
  
  #ifdef HAVE_SETLOCALE
  #include <locale.h>
  #endif
  
  #define PASSARGS             t,       av,        offset_add
  #define CALLARGS const char *t, char *av[], int *offset_add
  typedef int (callerFn) (CALLARGS);
  
  typedef enum {
      o_unknown = 0
      ,o_allow_close
      ,o_and_widget
      ,o_ascii_lines
      ,o_aspect
      ,o_auto_placement
      ,o_backtitle
      ,o_beep
      ,o_beep_after
      ,o_begin
      ,o_calendar
      ,o_cancel_label
      ,o_checklist
      ,o_clear
      ,o_colors
      ,o_column_separator
      ,o_cr_wrap
      ,o_create_rc
      ,o_date_format
      ,o_default_item
      ,o_defaultno
      ,o_dselect
      ,o_editbox
      ,o_exit_label
      ,o_extra_button
      ,o_extra_label
      ,o_fixed_font
      ,o_form
      ,o_fselect
      ,o_fullbutton
      ,o_gauge
      ,o_help
      ,o_help_button
      ,o_help_file
      ,o_help_label
      ,o_help_line
      ,o_help_status
      ,o_icon
      ,o_ignore
      ,o_infobox
      ,o_input_fd
      ,o_inputbox
      ,o_inputmenu
      ,o_insecure
      ,o_item_help
      ,o_keep_colors
      ,o_keep_tite
      ,o_keep_window
      ,o_max_input
      ,o_menu
      ,o_mixedform
      ,o_mixedgauge
      ,o_msgbox
      ,o_no_close
      ,o_no_collapse
      ,o_no_cr_wrap
      ,o_no_kill
      ,o_no_label
      ,o_no_lines
      ,o_no_mouse
      ,o_no_nl_expand
      ,o_no_shadow
      ,o_nocancel
      ,o_noitem
      ,o_nook
      ,o_ok_label
      ,o_output_fd
      ,o_output_separator
      ,o_passwordbox
      ,o_passwordform
      ,o_pause
      ,o_prgbox
      ,o_print_maxsize
      ,o_print_size
      ,o_print_version
      ,o_programbox
      ,o_progressbox
      ,o_quoted
      ,o_radiolist
      ,o_screen_center
      ,o_scrollbar
      ,o_separate_output
      ,o_separate_widget
      ,o_separator
      ,o_shadow
      ,o_single_quoted
      ,o_size_err
      ,o_sleep
      ,o_smooth
      ,o_stderr
      ,o_stdout
      ,o_tab_correct
      ,o_tab_len
      ,o_tailbox
      ,o_tailboxbg
      ,o_textbox
      ,o_time_format
      ,o_timebox
      ,o_timeout
      ,o_title
      ,o_trim
      ,o_under_mouse
      ,o_version
      ,o_visit_items
      ,o_wmclass
      ,o_yes_label
      ,o_yesno
  #ifdef HAVE_DLG_TRACE
      ,o_trace
  #endif
  } eOptions;
  
  /*
   * The bits in 'pass' are used to decide which options are applicable at
   * different stages in the program:
   *	1 flags before widgets
   *	2 widgets
   *	4 non-widget options
   */
  typedef struct {
      const char *name;
      eOptions code;
      int pass;			/* 1,2,4 or combination */
      const char *help;		/* NULL to suppress, non-empty to display params */
  } Options;
  
  typedef struct {
      eOptions code;
      int argmin, argmax;
      callerFn *jumper;
  } Mode;
  
  static bool *dialog_opts;
  static char **dialog_argv;
  
  static bool ignore_unknown = FALSE;
  
  static const char *program = "dialog";
  
  /*
   * The options[] table is organized this way to make it simple to maintain
   * a sorted list of options for the help-message.
   */
  /* *INDENT-OFF* */
  static const Options options[] = {
      { "allow-close",	o_allow_close,		1, NULL },
      { "and-widget",	o_and_widget,		4, NULL },
      { "ascii-lines",	o_ascii_lines, 		1, "" },
      { "aspect",		o_aspect,		1, "<ratio>" },
      { "auto-placement", o_auto_placement,	1, NULL },
      { "backtitle",	o_backtitle,		1, "<backtitle>" },
      { "beep",		o_beep,			1, NULL },
      { "beep-after",	o_beep_after,		1, NULL },
      { "begin",		o_begin,		1, "<y> <x>" },
      { "calendar",	o_calendar,		2, "<text> <height> <width> <day> <month> <year>" },
      { "cancel-label",	o_cancel_label,		1, "<str>" },
      { "checklist",	o_checklist,		2, "<text> <height> <width> <list height> <tag1> <item1> <status1>..." },
      { "clear",		o_clear,		1, "" },
      { "colors",		o_colors,		1, "" },
      { "column-separator",o_column_separator,	1, "<str>" },
      { "cr-wrap",	o_cr_wrap,		1, "" },
      { "create-rc",	o_create_rc,		1, NULL },
      { "date-format",	o_date_format,		1, "<str>" },
      { "default-item",	o_default_item,		1, "<str>" },
      { "defaultno",	o_defaultno,		1, "" },
      { "dselect",	o_dselect,		2, "<directory> <height> <width>" },
      { "editbox",	o_editbox,		2, "<file> <height> <width>" },
      { "exit-label",	o_exit_label,		1, "<str>" },
      { "extra-button",	o_extra_button,		1, "" },
      { "extra-label",	o_extra_label,		1, "<str>" },
      { "fb",		o_fullbutton,		1, NULL },
      { "fixed-font",	o_fixed_font,		1, NULL },
      { "form",		o_form,			2, "<text> <height> <width> <form height> <label1> <l_y1> <l_x1> <item1> <i_y1> <i_x1> <flen1> <ilen1>..." },
      { "fselect",	o_fselect,		2, "<filepath> <height> <width>" },
      { "fullbutton",	o_fullbutton,		1, NULL },
      { "gauge",		o_gauge,		2, "<text> <height> <width> [<percent>]" },
      { "guage",		o_gauge,		2, NULL },
      { "help",		o_help,			4, "" },
      { "help-button",	o_help_button,		1, "" },
      { "help-label",	o_help_label,		1, "<str>" },
      { "help-status",	o_help_status,		1, "" },
      { "hfile",		o_help_file,		1, "<str>" },
      { "hline",		o_help_line,		1, "<str>" },
      { "icon",		o_icon,			1, NULL },
      { "ignore",		o_ignore,		1, "" },
      { "infobox",	o_infobox,		2, "<text> <height> <width>" },
      { "input-fd",	o_input_fd,		1, "<fd>" },
      { "inputbox",	o_inputbox,		2, "<text> <height> <width> [<init>]" },
      { "inputmenu",	o_inputmenu,		2, "<text> <height> <width> <menu height> <tag1> <item1>..." },
      { "insecure",	o_insecure,		1, "" },
      { "item-help",	o_item_help,		1, "" },
      { "keep-colors",	o_keep_colors,		1, NULL },
      { "keep-tite",	o_keep_tite,		1, "" },
      { "keep-window",	o_keep_window,		1, "" },
      { "max-input",	o_max_input,		1, "<n>" },
      { "menu",		o_menu,			2, "<text> <height> <width> <menu height> <tag1> <item1>..." },
      { "mixedform",	o_mixedform,		2, "<text> <height> <width> <form height> <label1> <l_y1> <l_x1> <item1> <i_y1> <i_x1> <flen1> <ilen1> <itype>..." },
      { "mixedgauge",	o_mixedgauge,		2, "<text> <height> <width> <percent> <tag1> <item1>..." },
      { "msgbox",		o_msgbox,		2, "<text> <height> <width>" },
      { "no-cancel",	o_nocancel,		1, "" },
      { "no-close",	o_no_close,		1, NULL },
      { "no-collapse",	o_no_collapse,		1, "" },
      { "no-cr-wrap",	o_no_cr_wrap,		1, NULL },
      { "no-kill",	o_no_kill,		1, "" },
      { "no-label",	o_no_label,		1, "<str>" },
      { "no-lines",	o_no_lines, 		1, "" },
      { "no-mouse",	o_no_mouse,		1, "" },
      { "no-nl-expand",	o_no_nl_expand,		1, "" },
      { "no-ok",		o_nook,			1, "" },
      { "no-shadow",	o_no_shadow,		1, "" },
      { "nocancel",	o_nocancel,		1, NULL }, /* see --no-cancel */
      { "noitem",		o_noitem,		1, NULL },
      { "nook",		o_nook,			1, "" }, /* See no-ok */
      { "ok-label",	o_ok_label,		1, "<str>" },
      { "output-fd",	o_output_fd,		1, "<fd>" },
      { "output-separator",o_output_separator,	1, "<str>" },
      { "passwordbox",	o_passwordbox,		2, "<text> <height> <width> [<init>]" },
      { "passwordform",	o_passwordform,		2, "<text> <height> <width> <form height> <label1> <l_y1> <l_x1> <item1> <i_y1> <i_x1> <flen1> <ilen1>..." },
      { "pause",		o_pause,		2, "<text> <height> <width> <seconds>" },
      { "prgbox",		o_prgbox,		2, "<text> <command> <height> <width>" },
      { "print-maxsize",	o_print_maxsize,	1, "" },
      { "print-size",	o_print_size,		1, "" },
      { "print-version",	o_print_version,	5, "" },
      { "programbox",	o_programbox,		2, "<text> <height> <width>" },
      { "progressbox",	o_progressbox,		2, "<text> <height> <width>" },
      { "quoted",		o_quoted,		1, "" },
      { "radiolist",	o_radiolist,		2, "<text> <height> <width> <list height> <tag1> <item1> <status1>..." },
      { "screen-center",	o_screen_center,	1, NULL },
      { "scrollbar",	o_scrollbar,		1, "" },
      { "separate-output",o_separate_output,	1, "" },
      { "separate-widget",o_separate_widget,	1, "<str>" },
      { "separator",	o_separator,		1, NULL },
      { "shadow",		o_shadow,		1, "" },
      { "single-quoted",	o_single_quoted,	1, "" },
      { "size-err",	o_size_err,		1, "" },
      { "sleep",		o_sleep,		1, "<secs>" },
      { "smooth",		o_smooth,		1, NULL },
      { "stderr",		o_stderr,		1, "" },
      { "stdout",		o_stdout,		1, "" },
      { "tab-correct",	o_tab_correct,		1, "" },
      { "tab-len",	o_tab_len,		1, "<n>" },
      { "tailbox",	o_tailbox,		2, "<file> <height> <width>" },
      { "tailboxbg",	o_tailboxbg,		2, "<file> <height> <width>" },
      { "textbox",	o_textbox,		2, "<file> <height> <width>" },
      { "time-format",	o_time_format,		1, "<str>" },
      { "timebox",	o_timebox,		2, "<text> <height> <width> <hour> <minute> <second>" },
      { "timeout",	o_timeout,		1, "<secs>" },
      { "title",		o_title,		1, "<title>" },
      { "trim",		o_trim,			1, "" },
      { "under-mouse", 	o_under_mouse,		1, NULL },
      { "version",	o_version,		5, "" },
      { "visit-items", 	o_visit_items,		1, "" },
      { "wmclass",	o_wmclass,		1, NULL },
      { "yes-label",	o_yes_label,		1, "<str>" },
      { "yesno",		o_yesno,		2, "<text> <height> <width>" },
  #ifdef HAVE_DLG_TRACE
      { "trace",		o_trace,		1, "<file>" },
  #endif
  };
  /* *INDENT-ON* */
  
  /*
   * Make an array showing which argv[] entries are options.  Use "--" as a
   * special token to escape the next argument, allowing it to begin with "--".
   * When we find a "--" argument, also remove it from argv[] and adjust argc.
   * That appears to be an undocumented feature of the popt library.
   *
   * Also, if we see a "--file", expand it into the parameter list by reading the
   * text from the given file and stripping quotes, treating whitespace outside
   * quotes as a parameter delimiter.
   *
   * Finally, if we see a "--args", dump the current list of arguments to the
   * standard error.  This is used for debugging complex --file combinations.
   */
  static void
  unescape_argv(int *argcp, char ***argvp)
  {
      int j, k;
      int limit_includes = 20 + *argcp;
      int count_includes = 0;
      bool changed = FALSE;
      bool doalloc = FALSE;
      char *filename;
  
      dialog_opts = dlg_calloc(bool, (size_t) *argcp + 1);
      assert_ptr(dialog_opts, "unescape_argv");
  
      for (j = 1; j < *argcp; j++) {
  	bool escaped = FALSE;
  	if (!strcmp((*argvp)[j], "--")) {
  	    escaped = TRUE;
  	    changed = dlg_eat_argv(argcp, argvp, j, 1);
  	} else if (!strcmp((*argvp)[j], "--args")) {
  	    fprintf(stderr, "Showing arguments at arg%d\n", j);
  	    for (k = 0; k < *argcp; ++k) {
  		fprintf(stderr, " arg%d:%s\n", k, (*argvp)[k]);
  	    }
  	    changed = dlg_eat_argv(argcp, argvp, j, 1);
  	} else if (!strcmp((*argvp)[j], "--file")) {
  	    if (++count_includes > limit_includes)
  		dlg_exiterr("Too many --file options");
  
  	    if ((filename = (*argvp)[j + 1]) != 0) {
  		FILE *fp;
  		char **list;
  		char *blob;
  		int added;
  		size_t bytes_read;
  		size_t length;
  		int n;
  
  		if (*filename == '&') {
  		    fp = fdopen(atoi(filename + sizeof(char)), "r");
  		} else {
  		    fp = fopen(filename, "r");
  		}
  
  		if (fp) {
  		    blob = NULL;
  		    length = 0;
  		    do {
  			blob = dlg_realloc(char, length + BUFSIZ + 1, blob);
  			assert_ptr(blob, "unescape_argv");
  			bytes_read = fread(blob + length,
  					   sizeof(char),
  					     (size_t) BUFSIZ,
  					   fp);
  			length += bytes_read;
  			if (ferror(fp))
  			    dlg_exiterr("error on filehandle in unescape_argv");
  		    } while (bytes_read == BUFSIZ);
  		    fclose(fp);
  
  		    blob[length] = '\0';
  
  		    list = dlg_string_to_argv(blob);
  		    if ((added = dlg_count_argv(list)) != 0) {
  			if (added > 2) {
  			    size_t need = (size_t) (*argcp + added + 1);
  			    if (doalloc) {
  				*argvp = dlg_realloc(char *, need, *argvp);
  				assert_ptr(*argvp, "unescape_argv");
  			    } else {
  				char **newp = dlg_malloc(char *, need);
  				assert_ptr(newp, "unescape_argv");
  				for (n = 0; n < *argcp; ++n) {
  				    newp[n] = (*argvp)[n];
  				}
  				*argvp = newp;
  				doalloc = TRUE;
  			    }
  			    dialog_opts = dlg_realloc(bool, need, dialog_opts);
  			    assert_ptr(dialog_opts, "unescape_argv");
  			}
  			for (n = *argcp; n >= j + 2; --n) {
  			    (*argvp)[n + added - 2] = (*argvp)[n];
  			    dialog_opts[n + added - 2] = dialog_opts[n];
  			}
  			for (n = 0; n < added; ++n) {
  			    (*argvp)[n + j] = list[n];
  			    dialog_opts[n + j] = FALSE;
  			}
  			*argcp += added - 2;
  			free(list);
  		    }
  		} else {
  		    dlg_exiterr("Cannot open --file %s", filename);
  		}
  		(*argvp)[*argcp] = 0;
  		++j;
  		continue;
  	    } else {
  		dlg_exiterr("No value given for --file");
  	    }
  	}
  	if (!escaped
  	    && (*argvp)[j] != 0
  	    && !strncmp((*argvp)[j], "--", (size_t) 2)
  	    && isalpha(UCH((*argvp)[j][2]))) {
  	    dialog_opts[j] = TRUE;
  	}
      }
  
      /* if we didn't find any "--" tokens, there's no reason to do the table
       * lookup in isOption()
       */
      if (!changed) {
  	free(dialog_opts);
  	dialog_opts = 0;
      }
      dialog_argv = (*argvp);
  }
  
  /*
   * Check if the given string from main's argv is an option.
   */
  static bool
  isOption(const char *arg)
  {
      bool result = FALSE;
  
      if (arg != 0) {
  	if (dialog_opts != 0) {
  	    int n;
  	    for (n = 1; dialog_argv[n] != 0; ++n) {
  		if (dialog_argv[n] == arg) {
  		    result = dialog_opts[n];
  		    break;
  		}
  	    }
  	} else if (!strncmp(arg, "--", (size_t) 2) && isalpha(UCH(arg[2]))) {
  	    result = TRUE;
  	}
      }
      return result;
  }
  
  static eOptions
  lookupOption(const char *name, int pass)
  {
      unsigned n;
  
      if (isOption(name)) {
  	name += 2;
  	for (n = 0; n < sizeof(options) / sizeof(options[0]); n++) {
  	    if ((pass & options[n].pass) != 0
  		&& !strcmp(name, options[n].name)) {
  		return options[n].code;
  	    }
  	}
      }
      return o_unknown;
  }
  
  static void
  Usage(const char *msg)
  {
      dlg_exiterr("Error: %s.\nUse --help to list options.\n\n", msg);
  }
  
  /*
   * Count arguments, stopping at the end of the argument list, or on any of our
   * "--" tokens.
   */
  static int
  arg_rest(char *argv[])
  {
      int i = 1;			/* argv[0] points to a "--" token */
  
      while (argv[i] != 0
  	   && (!isOption(argv[i]) || lookupOption(argv[i], 7) == o_unknown))
  	i++;
      return i;
  }
  
  /*
   * In MultiWidget this function is needed to count how many tags
   * a widget (menu, checklist, radiolist) has
   */
  static int
  howmany_tags(char *argv[], int group)
  {
      int result = 0;
      int have;
      const char *format = "Expected %d arguments, found only %d";
      char temp[80];
  
      while (argv[0] != 0) {
  	if (isOption(argv[0]))
  	    break;
  	if ((have = arg_rest(argv)) < group) {
  	    sprintf(temp, format, group, have);
  	    Usage(temp);
  	}
  
  	argv += group;
  	result++;
      }
  
      return result;
  }
  
  static int
  numeric_arg(char **av, int n)
  {
      char *last = 0;
      int result = (int) strtol(av[n], &last, 10);
      char msg[80];
  
      if (last == 0 || *last != 0) {
  	sprintf(msg, "Expected a number for token %d of %.20s", n, av[0]);
  	Usage(msg);
      }
      return result;
  }
  
  static char *
  optional_str(char **av, int n, char *dft)
  {
      char *ret = dft;
      if (arg_rest(av) > n)
  	ret = av[n];
      return ret;
  }
  
  #if defined(HAVE_DLG_GAUGE) || defined(HAVE_XDIALOG)
  static int
  optional_num(char **av, int n, int dft)
  {
      int ret = dft;
      if (arg_rest(av) > n)
  	ret = numeric_arg(av, n);
      return ret;
  }
  #endif
  
  /*
   * On AIX 4.x, we have to flush the output right away since there is a bug in
   * the curses package which discards stdout even when we've used newterm to
   * redirect output to /dev/tty.
   */
  static int
  show_result(int ret)
  {
      bool either = FALSE;
  
      switch (ret) {
      case DLG_EXIT_OK:
      case DLG_EXIT_EXTRA:
      case DLG_EXIT_HELP:
      case DLG_EXIT_ITEM_HELP:
  	if ((dialog_state.output_count > 1) && !dialog_vars.separate_output) {
  	    fputs((dialog_state.separate_str
  		   ? dialog_state.separate_str
  		   : DEFAULT_SEPARATE_STR),
  		  dialog_state.output);
  	    either = TRUE;
  	}
  	if (dialog_vars.input_result != 0
  	    && dialog_vars.input_result[0] != '\0') {
  	    fputs(dialog_vars.input_result, dialog_state.output);
  	    either = TRUE;
  	}
  	if (either) {
  	    fflush(dialog_state.output);
  	}
  	break;
      }
      return ret;
  }
  
  /*
   * These are the widget callers.
   */
  
  static int
  call_yesno(CALLARGS)
  {
      *offset_add = 4;
      return dialog_yesno(t,
  			av[1],
  			numeric_arg(av, 2),
  			numeric_arg(av, 3));
  }
  
  static int
  call_msgbox(CALLARGS)
  {
      *offset_add = 4;
      return dialog_msgbox(t,
  			 av[1],
  			 numeric_arg(av, 2),
  			 numeric_arg(av, 3), 1);
  }
  
  static int
  call_infobox(CALLARGS)
  {
      *offset_add = 4;
      return dialog_msgbox(t,
  			 av[1],
  			 numeric_arg(av, 2),
  			 numeric_arg(av, 3), 0);
  }
  
  static int
  call_textbox(CALLARGS)
  {
      *offset_add = 4;
      return dialog_textbox(t,
  			  av[1],
  			  numeric_arg(av, 2),
  			  numeric_arg(av, 3));
  }
  
  static int
  call_menu(CALLARGS)
  {
      int tags = howmany_tags(av + 5, MENUBOX_TAGS);
      *offset_add = 5 + tags * MENUBOX_TAGS;
  
      return dialog_menu(t,
  		       av[1],
  		       numeric_arg(av, 2),
  		       numeric_arg(av, 3),
  		       numeric_arg(av, 4),
  		       tags, av + 5);
  }
  
  static int
  call_inputmenu(CALLARGS)
  {
      int tags = howmany_tags(av + 5, MENUBOX_TAGS);
      bool free_extra_label = FALSE;
      int result;
  
      dialog_vars.input_menu = TRUE;
  
      if (dialog_vars.max_input == 0)
  	dialog_vars.max_input = MAX_LEN / 2;
  
      if (dialog_vars.extra_label == 0) {
  	free_extra_label = TRUE;
  	dialog_vars.extra_label = dlg_strclone(_("Rename"));
      }
  
      dialog_vars.extra_button = TRUE;
  
      *offset_add = 5 + tags * MENUBOX_TAGS;
      result = dialog_menu(t,
  			 av[1],
  			 numeric_arg(av, 2),
  			 numeric_arg(av, 3),
  			 numeric_arg(av, 4),
  			 tags, av + 5);
      if (free_extra_label) {
  	free(dialog_vars.extra_label);
  	dialog_vars.extra_label = 0;
      }
      return result;
  }
  
  static int
  call_checklist(CALLARGS)
  {
      int tags = howmany_tags(av + 5, CHECKBOX_TAGS);
      int code;
      bool save_quoted = dialog_vars.quoted;
  
      dialog_vars.quoted = !dialog_vars.separate_output;
      *offset_add = 5 + tags * CHECKBOX_TAGS;
      code = dialog_checklist(t,
  			    av[1],
  			    numeric_arg(av, 2),
  			    numeric_arg(av, 3),
  			    numeric_arg(av, 4),
  			    tags, av + 5, FLAG_CHECK);
      dialog_vars.quoted = save_quoted;
      return code;
  }
  
  static int
  call_radiolist(CALLARGS)
  {
      int tags = howmany_tags(av + 5, CHECKBOX_TAGS);
      *offset_add = 5 + tags * CHECKBOX_TAGS;
      return dialog_checklist(t,
  			    av[1],
  			    numeric_arg(av, 2),
  			    numeric_arg(av, 3),
  			    numeric_arg(av, 4),
  			    tags, av + 5, FLAG_RADIO);
  }
  
  static int
  call_inputbox(CALLARGS)
  {
      *offset_add = arg_rest(av);
      return dialog_inputbox(t,
  			   av[1],
  			   numeric_arg(av, 2),
  			   numeric_arg(av, 3),
  			   optional_str(av, 4, 0), 0);
  }
  
  static int
  call_passwordbox(CALLARGS)
  {
      *offset_add = arg_rest(av);
      return dialog_inputbox(t,
  			   av[1],
  			   numeric_arg(av, 2),
  			   numeric_arg(av, 3),
  			   optional_str(av, 4, 0), 1);
  }
  
  #ifdef HAVE_XDIALOG
  static int
  call_calendar(CALLARGS)
  {
      *offset_add = arg_rest(av);
      return dialog_calendar(t,
  			   av[1],
  			   numeric_arg(av, 2),
  			   numeric_arg(av, 3),
  			   optional_num(av, 4, -1),
  			   optional_num(av, 5, -1),
  			   optional_num(av, 6, -1));
  }
  
  static int
  call_dselect(CALLARGS)
  {
      *offset_add = arg_rest(av);
      return dialog_dselect(t,
  			  av[1],
  			  numeric_arg(av, 2),
  			  numeric_arg(av, 3));
  }
  
  static int
  call_editbox(CALLARGS)
  {
      *offset_add = 4;
      return dialog_editbox(t,
  			  av[1],
  			  numeric_arg(av, 2),
  			  numeric_arg(av, 3));
  }
  
  static int
  call_fselect(CALLARGS)
  {
      *offset_add = arg_rest(av);
      return dialog_fselect(t,
  			  av[1],
  			  numeric_arg(av, 2),
  			  numeric_arg(av, 3));
  }
  
  static int
  call_timebox(CALLARGS)
  {
      *offset_add = arg_rest(av);
      return dialog_timebox(t,
  			  av[1],
  			  numeric_arg(av, 2),
  			  numeric_arg(av, 3),
  			  optional_num(av, 4, -1),
  			  optional_num(av, 5, -1),
  			  optional_num(av, 6, -1));
  }
  #endif /* HAVE_XDIALOG */
  
  #ifdef HAVE_DLG_FORMBOX
  static int
  call_form(CALLARGS)
  {
      int group = FORMBOX_TAGS;
      int tags = howmany_tags(av + 5, group);
      *offset_add = 5 + tags * group;
  
      return dialog_form(t,
  		       av[1],
  		       numeric_arg(av, 2),
  		       numeric_arg(av, 3),
  		       numeric_arg(av, 4),
  		       tags, av + 5);
  }
  
  static int
  call_password_form(CALLARGS)
  {
      unsigned save = dialog_vars.formitem_type;
      int result;
  
      dialog_vars.formitem_type = 1;
      result = call_form(PASSARGS);
      dialog_vars.formitem_type = save;
  
      return result;
  }
  #endif /* HAVE_DLG_FORMBOX */
  
  #ifdef HAVE_DLG_MIXEDFORM
  static int
  call_mixed_form(CALLARGS)
  {
      int group = MIXEDFORM_TAGS;
      int tags = howmany_tags(av + 5, group);
      *offset_add = 5 + tags * group;
  
      return dialog_mixedform(t,
  			    av[1],
  			    numeric_arg(av, 2),
  			    numeric_arg(av, 3),
  			    numeric_arg(av, 4),
  			    tags, av + 5);
  }
  #endif /* HAVE_DLG_MIXEDFORM */
  
  #ifdef HAVE_DLG_GAUGE
  static int
  call_gauge(CALLARGS)
  {
      *offset_add = arg_rest(av);
      return dialog_gauge(t,
  			av[1],
  			numeric_arg(av, 2),
  			numeric_arg(av, 3),
  			optional_num(av, 4, 0));
  }
  
  static int
  call_pause(CALLARGS)
  {
      *offset_add = arg_rest(av);
      return dialog_pause(t,
  			av[1],
  			numeric_arg(av, 2),
  			numeric_arg(av, 3),
  			numeric_arg(av, 4));
  }
  #endif
  
  #ifdef HAVE_MIXEDGAUGE
  static int
  call_mixed_gauge(CALLARGS)
  {
  #define MIXEDGAUGE_BASE 5
      int tags = howmany_tags(av + MIXEDGAUGE_BASE, MIXEDGAUGE_TAGS);
      *offset_add = MIXEDGAUGE_BASE + tags * MIXEDGAUGE_TAGS;
      return dialog_mixedgauge(t,
  			     av[1],
  			     numeric_arg(av, 2),
  			     numeric_arg(av, 3),
  			     numeric_arg(av, 4),
  			     tags, av + MIXEDGAUGE_BASE);
  }
  #endif
  
  #ifdef HAVE_DLG_GAUGE
  static int
  call_prgbox(CALLARGS)
  {
      *offset_add = arg_rest(av);
      /* the original version does not accept a prompt string, but for
       * consistency we allow it.
       */
      return ((*offset_add == 5)
  	    ? dialog_prgbox(t,
  			    av[1],
  			    av[2],
  			    numeric_arg(av, 3),
  			    numeric_arg(av, 4), TRUE)
  	    : dialog_prgbox(t,
  			    "",
  			    av[1],
  			    numeric_arg(av, 2),
  			    numeric_arg(av, 3), TRUE));
  }
  #endif
  
  #ifdef HAVE_DLG_GAUGE
  static int
  call_programbox(CALLARGS)
  {
      int result;
  
      *offset_add = arg_rest(av);
      /* this function is a compromise between --prgbox and --progressbox.
       */
      result = ((*offset_add == 4)
  	      ? dlg_progressbox(t,
  				av[1],
  				numeric_arg(av, 2),
  				numeric_arg(av, 3),
  				TRUE,
  				dialog_state.pipe_input)
  	      : dlg_progressbox(t,
  				"",
  				numeric_arg(av, 1),
  				numeric_arg(av, 2),
  				TRUE,
  				dialog_state.pipe_input));
      dialog_state.pipe_input = 0;
      return result;
  }
  #endif
  
  #ifdef HAVE_DLG_GAUGE
  static int
  call_progressbox(CALLARGS)
  {
      *offset_add = arg_rest(av);
      /* the original version does not accept a prompt string, but for
       * consistency we allow it.
       */
      return ((*offset_add == 4)
  	    ? dialog_progressbox(t,
  				 av[1],
  				 numeric_arg(av, 2),
  				 numeric_arg(av, 3))
  	    : dialog_progressbox(t,
  				 "",
  				 numeric_arg(av, 1),
  				 numeric_arg(av, 2)));
  }
  #endif
  
  #ifdef HAVE_DLG_TAILBOX
  static int
  call_tailbox(CALLARGS)
  {
      *offset_add = 4;
      return dialog_tailbox(t,
  			  av[1],
  			  numeric_arg(av, 2),
  			  numeric_arg(av, 3),
  			  FALSE);
  }
  
  static int
  call_tailboxbg(CALLARGS)
  {
      *offset_add = 4;
      return dialog_tailbox(t,
  			  av[1],
  			  numeric_arg(av, 2),
  			  numeric_arg(av, 3),
  			  TRUE);
  }
  #endif
  /* *INDENT-OFF* */
  static const Mode modes[] =
  {
      {o_yesno,           4, 4, call_yesno},
      {o_msgbox,          4, 4, call_msgbox},
      {o_infobox,         4, 4, call_infobox},
      {o_textbox,         4, 4, call_textbox},
      {o_menu,            7, 0, call_menu},
      {o_inputmenu,       7, 0, call_inputmenu},
      {o_checklist,       8, 0, call_checklist},
      {o_radiolist,       8, 0, call_radiolist},
      {o_inputbox,        4, 5, call_inputbox},
      {o_passwordbox,     4, 5, call_passwordbox},
  #ifdef HAVE_DLG_GAUGE
      {o_gauge,           4, 5, call_gauge},
      {o_pause,           5, 5, call_pause},
      {o_prgbox,          4, 5, call_prgbox},
      {o_programbox,      3, 4, call_programbox},
      {o_progressbox,     3, 4, call_progressbox},
  #endif
  #ifdef HAVE_DLG_FORMBOX
      {o_passwordform,   13, 0, call_password_form},
      {o_form,           13, 0, call_form},
  #endif
  #ifdef HAVE_MIXEDGAUGE
      {o_mixedgauge,      MIXEDGAUGE_BASE, 0, call_mixed_gauge},
  #endif
  #ifdef HAVE_DLG_MIXEDFORM
      {o_mixedform,      13, 0, call_mixed_form},
  #endif
  #ifdef HAVE_DLG_TAILBOX
      {o_tailbox,         4, 4, call_tailbox},
      {o_tailboxbg,       4, 4, call_tailboxbg},
  #endif
  #ifdef HAVE_XDIALOG
      {o_calendar,        4, 7, call_calendar},
      {o_dselect,         4, 5, call_dselect},
      {o_editbox,         4, 4, call_editbox},
      {o_fselect,         4, 5, call_fselect},
      {o_timebox,         4, 7, call_timebox},
  #endif
  };
  /* *INDENT-ON* */
  
  static char *
  optionString(char **argv, int *num)
  {
      int next = *num + 1;
      char *result = argv[next];
      if (result == 0) {
  	char temp[80];
  	sprintf(temp, "Expected a string-parameter for %.20s", argv[*num]);
  	Usage(temp);
      }
      *num = next;
      return result;
  }
  
  static int
  optionValue(char **argv, int *num)
  {
      int next = *num + 1;
      char *src = argv[next];
      char *tmp = 0;
      int result = 0;
  
      if (src != 0) {
  	result = (int) strtol(src, &tmp, 0);
  	if (tmp == 0 || *tmp != 0)
  	    src = 0;
      }
  
      if (src == 0) {
  	char temp[80];
  	sprintf(temp, "Expected a numeric-parameter for %.20s", argv[*num]);
  	Usage(temp);
      }
      *num = next;
      return result;
  }
  
  /*
   * Print parts of a message
   */
  static void
  PrintList(const char *const *list)
  {
      const char *leaf = strrchr(program, '/');
      unsigned n = 0;
  
      if (leaf != 0)
  	leaf++;
      else
  	leaf = program;
  
      while (*list != 0) {
  	fprintf(dialog_state.output, *list, n ? leaf : dialog_version());
  	(void) fputc('\n', dialog_state.output);
  	n = 1;
  	list++;
      }
  }
  
  static const Mode *
  lookupMode(eOptions code)
  {
      const Mode *modePtr = 0;
      unsigned n;
  
      for (n = 0; n < sizeof(modes) / sizeof(modes[0]); n++) {
  	if (modes[n].code == code) {
  	    modePtr = &modes[n];
  	    break;
  	}
      }
      return modePtr;
  }
  
  static int
  compare_opts(const void *a, const void *b)
  {
      Options *const *p = (Options * const *) a;
      Options *const *q = (Options * const *) b;
      return strcmp((*p)->name, (*q)->name);
  }
  
  /*
   * Print program's version.
   */
  static void
  PrintVersion(FILE *fp)
  {
      fprintf(fp, "Version: %s\n", dialog_version());
  }
  
  /*
   * Print program help-message
   */
  static void
  Help(void)
  {
      static const char *const tbl_1[] =
      {
  	"cdialog (ComeOn Dialog!) version %s",
  	"Copyright 2000-2008,2011 Thomas E. Dickey",
  	"This is free software; see the source for copying conditions.  There is NO",
  	"warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.",
  	"",
  	"* Display dialog boxes from shell scripts *",
  	"",
  	"Usage: %s <options> { --and-widget <options> }",
  	"where options are \"common\" options, followed by \"box\" options",
  	"",
  #ifdef HAVE_RC_FILE
  	"Special options:",
  	"  [--create-rc \"file\"]",
  #endif
  	0
      }, *const tbl_3[] =
      {
  	"",
  	"Auto-size with height and width = 0. Maximize with height and width = -1.",
  	"Global-auto-size if also menu_height/list_height = 0.",
  	0
      };
      size_t limit = sizeof(options) / sizeof(options[0]);
      size_t j, k;
      const Options **opts;
  
      end_dialog();
      dialog_state.output = stdout;
  
      opts = dlg_calloc(const Options *, limit);
      assert_ptr(opts, "Help");
      for (j = 0; j < limit; ++j) {
  	opts[j] = &(options[j]);
      }
      qsort(opts, limit, sizeof(Options *), compare_opts);
  
      PrintList(tbl_1);
      fprintf(dialog_state.output, "Common options:\n ");
      for (j = k = 0; j < limit; j++) {
  	if ((opts[j]->pass & 1)
  	    && opts[j]->help != 0) {
  	    size_t len = 6 + strlen(opts[j]->name) + strlen(opts[j]->help);
  	    k += len;
  	    if (k > 75) {
  		fprintf(dialog_state.output, "\n ");
  		k = len;
  	    }
  	    fprintf(dialog_state.output, " [--%s%s%s]", opts[j]->name,
  		    *(opts[j]->help) ? " " : "", opts[j]->help);
  	}
      }
      fprintf(dialog_state.output, "\nBox options:\n");
      for (j = 0; j < limit; j++) {
  	if ((opts[j]->pass & 2) != 0
  	    && opts[j]->help != 0
  	    && lookupMode(opts[j]->code))
  	    fprintf(dialog_state.output, "  --%-12s %s\n", opts[j]->name,
  		    opts[j]->help);
      }
      PrintList(tbl_3);
  
      free(opts);
      dlg_exit(DLG_EXIT_OK);
  }
  
  /*
   * "Common" options apply to all widgets more/less.  Most of the common options
   * set values in dialog_vars, a few set dialog_state and a couple write to the
   * output stream.
   */
  static int
  process_common_options(int argc, char **argv, int offset, bool output)
  {
  #ifdef HAVE_DLG_TRACE
      int n;
  #endif
      bool done = FALSE;
  
      while (offset < argc && !done) {	/* Common options */
  	switch (lookupOption(argv[offset], 1)) {
  	case o_title:
  	    dialog_vars.title = optionString(argv, &offset);
  	    break;
  	case o_backtitle:
  	    dialog_vars.backtitle = optionString(argv, &offset);
  	    break;
  	case o_separate_widget:
  	    dialog_state.separate_str = optionString(argv, &offset);
  	    break;
  	case o_separate_output:
  	    dialog_vars.separate_output = TRUE;
  	    break;
  	case o_colors:
  	    dialog_vars.colors = TRUE;
  	    break;
  	case o_cr_wrap:
  	    dialog_vars.cr_wrap = TRUE;
  	    break;
  	case o_no_nl_expand:
  	    dialog_vars.no_nl_expand = TRUE;
  	    break;
  	case o_no_collapse:
  	    dialog_vars.nocollapse = TRUE;
  	    break;
  	case o_no_kill:
  	    dialog_vars.cant_kill = TRUE;
  	    break;
  	case o_nocancel:
  	    dialog_vars.nocancel = TRUE;
  	    break;
  	case o_nook:
  	    dialog_vars.nook = TRUE;
  	    break;
  	case o_quoted:
  	    dialog_vars.quoted = TRUE;
  	    break;
  	case o_single_quoted:
  	    dialog_vars.single_quoted = TRUE;
  	    break;
  	case o_size_err:
  	    dialog_vars.size_err = TRUE;
  	    break;
  	case o_beep:
  	    dialog_vars.beep_signal = TRUE;
  	    break;
  	case o_beep_after:
  	    dialog_vars.beep_after_signal = TRUE;
  	    break;
  	case o_scrollbar:
  	    dialog_state.use_scrollbar = TRUE;
  	    break;
  	case o_shadow:
  	    dialog_state.use_shadow = TRUE;
  	    break;
  	case o_defaultno:
  	    dialog_vars.defaultno = TRUE;
  	    break;
  	case o_default_item:
  	    dialog_vars.default_item = optionString(argv, &offset);
  	    break;
  	case o_insecure:
  	    dialog_vars.insecure = TRUE;
  	    break;
  	case o_item_help:
  	    dialog_vars.item_help = TRUE;
  	    break;
  	case o_help_line:
  	    dialog_vars.help_line = optionString(argv, &offset);
  	    break;
  	case o_help_file:
  	    dialog_vars.help_file = optionString(argv, &offset);
  	    break;
  	case o_help_button:
  	    dialog_vars.help_button = TRUE;
  	    break;
  	case o_help_status:
  	    dialog_vars.help_status = TRUE;
  	    break;
  	case o_extra_button:
  	    dialog_vars.extra_button = TRUE;
  	    break;
  	case o_ignore:
  	    ignore_unknown = TRUE;
  	    break;
  	case o_keep_window:
  	    dialog_vars.keep_window = TRUE;
  	    break;
  	case o_no_shadow:
  	    dialog_state.use_shadow = FALSE;
  	    break;
  	case o_print_size:
  	    dialog_vars.print_siz = TRUE;
  	    break;
  	case o_print_maxsize:
  	    if (output) {
  		/*
  		 * If this is the last option, we do not want any error
  		 * messages - just our output.  Calling end_dialog() cancels
  		 * the refresh() at the end of the program as well.
  		 */
  		if (argv[offset + 1] == 0) {
  		    ignore_unknown = TRUE;
  		    end_dialog();
  		}
  		fflush(dialog_state.output);
  		fprintf(dialog_state.output, "MaxSize: %d, %d\n", SLINES, SCOLS);
  	    }
  	    break;
  	case o_print_version:
  	    if (output) {
  		PrintVersion(dialog_state.output);
  	    }
  	    break;
  	case o_separator:
  	case o_output_separator:
  	    dialog_vars.output_separator = optionString(argv, &offset);
  	    break;
  	case o_column_separator:
  	    dialog_vars.column_separator = optionString(argv, &offset);
  	    break;
  	case o_tab_correct:
  	    dialog_vars.tab_correct = TRUE;
  	    break;
  	case o_sleep:
  	    dialog_vars.sleep_secs = optionValue(argv, &offset);
  	    break;
  	case o_timeout:
  	    dialog_vars.timeout_secs = optionValue(argv, &offset);
  	    break;
  	case o_max_input:
  	    dialog_vars.max_input = optionValue(argv, &offset);
  	    break;
  	case o_tab_len:
  	    dialog_state.tab_len = optionValue(argv, &offset);
  	    break;
  	case o_trim:
  	    dialog_vars.trim_whitespace = TRUE;
  	    break;
  	case o_visit_items:
  	    dialog_state.visit_items = TRUE;
  	    break;
  	case o_aspect:
  	    dialog_state.aspect_ratio = optionValue(argv, &offset);
  	    break;
  	case o_begin:
  	    dialog_vars.begin_set = TRUE;
  	    dialog_vars.begin_y = optionValue(argv, &offset);
  	    dialog_vars.begin_x = optionValue(argv, &offset);
  	    break;
  	case o_clear:
  	    dialog_vars.dlg_clear_screen = TRUE;
  	    break;
  	case o_yes_label:
  	    dialog_vars.yes_label = optionString(argv, &offset);
  	    break;
  	case o_no_label:
  	    dialog_vars.no_label = optionString(argv, &offset);
  	    break;
  	case o_ok_label:
  	    dialog_vars.ok_label = optionString(argv, &offset);
  	    break;
  	case o_cancel_label:
  	    dialog_vars.cancel_label = optionString(argv, &offset);
  	    break;
  	case o_extra_label:
  	    dialog_vars.extra_label = optionString(argv, &offset);
  	    break;
  	case o_exit_label:
  	    dialog_vars.exit_label = optionString(argv, &offset);
  	    break;
  	case o_help_label:
  	    dialog_vars.help_label = optionString(argv, &offset);
  	    break;
  	case o_date_format:
  	    dialog_vars.date_format = optionString(argv, &offset);
  	    break;
  	case o_time_format:
  	    dialog_vars.time_format = optionString(argv, &offset);
  	    break;
  	case o_keep_tite:
  	    dialog_vars.keep_tite = TRUE;
  	    break;
  	case o_ascii_lines:
  	    dialog_vars.ascii_lines = TRUE;
  	    dialog_vars.no_lines = FALSE;
  	    break;
  	case o_no_lines:
  	    dialog_vars.no_lines = TRUE;
  	    dialog_vars.ascii_lines = FALSE;
  	    break;
  	case o_no_mouse:
  	    dialog_state.no_mouse = TRUE;
  	    mouse_close();
  	    break;
  	case o_noitem:
  	case o_fullbutton:
  	    /* ignore */
  	    break;
  	    /* options of Xdialog which we ignore */
  	case o_icon:
  	case o_wmclass:
  	    (void) optionString(argv, &offset);
  	    /* FALLTHRU */
  	case o_allow_close:
  	case o_auto_placement:
  	case o_fixed_font:
  	case o_keep_colors:
  	case o_no_close:
  	case o_no_cr_wrap:
  	case o_screen_center:
  	case o_smooth:
  	case o_under_mouse:
  	    break;
  	case o_unknown:
  	    if (ignore_unknown)
  		break;
  	    /* FALLTHRU */
  	default:		/* no more common options */
  	    done = TRUE;
  	    break;
  #ifdef HAVE_DLG_TRACE
  	case o_trace:
  	    dlg_trace(optionString(argv, &offset));
  	    for (n = 0; argv[n] != 0; ++n) {
  		dlg_trace_msg("argv[%d] = %s\n", n, argv[n]);
  	    }
  	    break;
  #endif
  	}
  	if (!done)
  	    offset++;
      }
      return offset;
  }
  
  /*
   * Initialize options at the start of a series of common options culminating
   * in a widget.
   */
  static void
  init_result(char *buffer)
  {
      static bool first = TRUE;
      static char **special_argv = 0;
      static int special_argc = 0;
  
      /* clear everything we do not save for the next widget */
      memset(&dialog_vars, 0, sizeof(dialog_vars));
  
      dialog_vars.input_result = buffer;
      dialog_vars.input_result[0] = '\0';
  
      /*
       * The first time this is called, check for common options given by an
       * environment variable.
       */
      if (first) {
  	char *env = getenv("DIALOGOPTS");
  	if (env != 0)
  	    env = dlg_strclone(env);
  	if (env != 0) {
  	    special_argv = dlg_string_to_argv(env);
  	    special_argc = dlg_count_argv(special_argv);
  	}
      }
      if (special_argv != 0) {
  	process_common_options(special_argc, special_argv, 0, FALSE);
  #ifdef NO_LEAKS
  	free(special_argv[0]);
  	free(special_argv);
  	first = TRUE;
  #endif
      }
  }
  
  int
  main(int argc, char *argv[])
  {
      char temp[256];
      bool esc_pressed = FALSE;
      bool keep_tite = FALSE;
      int offset = 1;
      int offset_add;
      int retval = DLG_EXIT_OK;
      int j, have;
      eOptions code;
      const Mode *modePtr;
      char my_buffer[MAX_LEN + 1];
  
      memset(&dialog_state, 0, sizeof(dialog_state));
      memset(&dialog_vars, 0, sizeof(dialog_vars));
  
  #if defined(ENABLE_NLS)
      /* initialize locale support */
      setlocale(LC_ALL, "");
      bindtextdomain(NLS_TEXTDOMAIN, LOCALEDIR);
      textdomain(NLS_TEXTDOMAIN);
  #elif defined(HAVE_SETLOCALE)
      (void) setlocale(LC_ALL, "");
  #endif
  
      unescape_argv(&argc, &argv);
      program = argv[0];
      dialog_state.output = stderr;
      dialog_state.input = stdin;
  
      /*
       * Look for the last --stdout, --stderr or --output-fd option, and use
       * that.  We can only write to one of them.  If --stdout is used, that
       * can interfere with initializing the curses library, so we want to
       * know explicitly if it is used.
       *
       * Also, look for any --version or --help message, processing those
       * immediately.
       */
      while (offset < argc) {
  	int base = offset;
  	switch (lookupOption(argv[offset], 7)) {
  	case o_stdout:
  	    dialog_state.output = stdout;
  	    break;
  	case o_stderr:
  	    dialog_state.output = stderr;
  	    break;
  	case o_input_fd:
  	    if ((j = optionValue(argv, &offset)) < 0
  		|| (dialog_state.input = fdopen(j, "r")) == 0)
  		dlg_exiterr("Cannot open input-fd\n");
  	    break;
  	case o_output_fd:
  	    if ((j = optionValue(argv, &offset)) < 0
  		|| (dialog_state.output = fdopen(j, "w")) == 0)
  		dlg_exiterr("Cannot open output-fd\n");
  	    break;
  	case o_keep_tite:
  	    keep_tite = TRUE;
  	    break;
  	case o_version:
  	    dialog_state.output = stdout;
  	    PrintVersion(dialog_state.output);
  	    exit(DLG_EXIT_OK);
  	    break;
  	case o_help:
  	    Help();
  	    break;
  	default:
  	    ++offset;
  	    continue;
  	}
  	for (j = base; j < argc; ++j) {
  	    dialog_argv[j] = dialog_argv[j + 1 + (offset - base)];
  	    if (dialog_opts != 0)
  		dialog_opts[j] = dialog_opts[j + 1 + (offset - base)];
  	}
  	argc -= (1 + offset - base);
  	offset = base;
      }
      offset = 1;
      init_result(my_buffer);
  
      /*
       * Dialog's output may be redirected (see above).  Handle the special
       * case of options that only report information without interaction.
       */
      if (argc == 2) {
  	switch (lookupOption(argv[1], 7)) {
  	case o_print_maxsize:
  	    (void) initscr();
  	    endwin();
  	    fflush(dialog_state.output);
  	    fprintf(dialog_state.output, "MaxSize: %d, %d\n", SLINES, SCOLS);
  	    break;
  	case o_print_version:
  	    PrintVersion(dialog_state.output);
  	    break;
  	case o_clear:
  	    initscr();
  	    refresh();
  	    endwin();
  	    break;
  	case o_ignore:
  	    break;
  	default:
  	    Help();
  	    break;
  	}
  	return DLG_EXIT_OK;
      }
  
      if (argc < 2) {
  	Help();
      }
  #ifdef HAVE_RC_FILE
      if (lookupOption(argv[1], 7) == o_create_rc) {
  	if (argc != 3) {
  	    sprintf(temp, "Expected a filename for %.50s", argv[1]);
  	    Usage(temp);
  	}
  	if (dlg_parse_rc() == -1)	/* Read the configuration file */
  	    dlg_exiterr("dialog: dlg_parse_rc");
  	dlg_create_rc(argv[2]);
  	return DLG_EXIT_OK;
      }
  #endif
  
      dialog_vars.keep_tite = keep_tite;	/* init_result() cleared global */
  
      init_dialog(dialog_state.input, dialog_state.output);
  
      while (offset < argc && !esc_pressed) {
  	init_result(my_buffer);
  
  	offset = process_common_options(argc, argv, offset, TRUE);
  
  	if (argv[offset] == NULL) {
  	    if (ignore_unknown)
  		break;
  	    Usage("Expected a box option");
  	}
  
  	if (lookupOption(argv[offset], 2) != o_checklist
  	    && dialog_vars.separate_output) {
  	    sprintf(temp, "Expected --checklist, not %.20s", argv[offset]);
  	    Usage(temp);
  	}
  
  	if (dialog_state.aspect_ratio == 0)
  	    dialog_state.aspect_ratio = DEFAULT_ASPECT_RATIO;
  
  	dlg_put_backtitle();
  
  	/* use a table to look for the requested mode, to avoid code duplication */
  
  	modePtr = 0;
  	if ((code = lookupOption(argv[offset], 2)) != o_unknown)
  	    modePtr = lookupMode(code);
  	if (modePtr == 0) {
  	    sprintf(temp, "%s option %.20s",
  		    lookupOption(argv[offset], 7) != o_unknown
  		    ? "Unexpected"
  		    : "Unknown",
  		    argv[offset]);
  	    Usage(temp);
  	}
  
  	have = arg_rest(&argv[offset]);
  	if (have < modePtr->argmin) {
  	    sprintf(temp, "Expected at least %d tokens for %.20s, have %d",
  		    modePtr->argmin - 1, argv[offset],
  		    have - 1);
  	    Usage(temp);
  	}
  	if (modePtr->argmax && have > modePtr->argmax) {
  	    sprintf(temp,
  		    "Expected no more than %d tokens for %.20s, have %d",
  		    modePtr->argmax - 1, argv[offset],
  		    have - 1);
  	    Usage(temp);
  	}
  
  	/*
  	 * Trim whitespace from non-title option values, e.g., the ones that
  	 * will be used as captions or prompts.   Do that only for the widget
  	 * we are about to process, since the "--trim" option is reset before
  	 * accumulating options for each widget.
  	 */
  	for (j = offset + 1; j <= offset + have; j++) {
  	    switch (lookupOption(argv[j - 1], 7)) {
  	    case o_unknown:
  	    case o_title:
  	    case o_backtitle:
  	    case o_help_line:
  	    case o_help_file:
  		break;
  	    default:
  		if (argv[j] != 0) {
  		    dlg_trim_string(argv[j]);
  		}
  		break;
  	    }
  	}
  
  	retval = show_result((*(modePtr->jumper)) (dialog_vars.title,
  						   argv + offset,
  						   &offset_add));
  	offset += offset_add;
  
  	if (dialog_vars.input_result != my_buffer) {
  	    free(dialog_vars.input_result);
  	    dialog_vars.input_result = 0;
  	}
  
  	if (retval == DLG_EXIT_ESC) {
  	    esc_pressed = TRUE;
  	} else {
  
  	    if (dialog_vars.beep_after_signal)
  		(void) beep();
  
  	    if (dialog_vars.sleep_secs)
  		(void) napms(dialog_vars.sleep_secs * 1000);
  
  	    if (offset < argc) {
  		switch (lookupOption(argv[offset], 7)) {
  		case o_and_widget:
  		    offset++;
  		    break;
  		case o_unknown:
  		    sprintf(temp, "Expected --and-widget, not %.20s",
  			    argv[offset]);
  		    Usage(temp);
  		    break;
  		default:
  		    /* if we got a cancel, etc., stop chaining */
  		    if (retval != DLG_EXIT_OK)
  			esc_pressed = TRUE;
  		    else
  			dialog_vars.dlg_clear_screen = TRUE;
  		    break;
  		}
  	    }
  	    if (dialog_vars.dlg_clear_screen)
  		dlg_clear();
  	}
      }
  
      dlg_killall_bg(&retval);
      if (dialog_state.screen_initialized) {
  	(void) refresh();
  	end_dialog();
      }
      dlg_exit(retval);
  }
  