gdb/tui/tui.c

   1 /* General functions for the WDB TUI.
   2
   3    Copyright (C) 1998-2019 Free Software Foundation, Inc.
   4
   5    Contributed by Hewlett-Packard Company.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23 #include "gdbcmd.h"
  24 #include "tui/tui.h"
  25 #include "tui/tui-hooks.h"
  26 #include "tui/tui-data.h"
  27 #include "tui/tui-layout.h"
  28 #include "tui/tui-io.h"
  29 #include "tui/tui-regs.h"
  30 #include "tui/tui-stack.h"
  31 #include "tui/tui-win.h"
  32 #include "tui/tui-winsource.h"
  33 #include "tui/tui-windata.h"
  34 #include "target.h"
  35 #include "frame.h"
  36 #include "breakpoint.h"
  37 #include "inferior.h"
  38 #include "symtab.h"
  39 #include "source.h"
  40 #include "terminal.h"
  41 #include "top.h"
  42
  43 #include <ctype.h>
  44 #include <signal.h>
  45 #include <fcntl.h>
  46 #if 0
  47 #include <termio.h>
  48 #endif
  49 #include <setjmp.h>
  50
  51 #include "gdb_curses.h"
  52 #include "interps.h"
  53
  54 /* This redefines CTRL if it is not already defined, so it must come
  55    after terminal state releated include files like <term.h> and
  56    "gdb_curses.h".  */
  57 #include "readline/readline.h"
  58
  59 /* Tells whether the TUI is active or not.  */
  60 int tui_active = 0;
  61 static int tui_finish_init = 1;
  62
  63 enum tui_key_mode tui_current_key_mode = TUI_COMMAND_MODE;
  64
  65 struct tui_char_command
  66 {
  67   unsigned char key;
  68   const char *cmd;
  69 };
  70
  71 /* Key mapping to gdb commands when the TUI is using the single key
  72    mode.  */
  73 static const struct tui_char_command tui_commands[] = {
  74   { 'c', "continue" },
  75   { 'd', "down" },
  76   { 'f', "finish" },
  77   { 'n', "next" },
  78   { 'o', "nexti" },
  79   { 'r', "run" },
  80   { 's', "step" },
  81   { 'i', "stepi" },
  82   { 'u', "up" },
  83   { 'v', "info locals" },
  84   { 'w', "where" },
  85   { 0, 0 },
  86 };
  87
  88 static Keymap tui_keymap;
  89 static Keymap tui_readline_standard_keymap;
  90
  91 /* TUI readline command.
  92    Switch the output mode between TUI/standard gdb.  */
  93 static int
  94 tui_rl_switch_mode (int notused1, int notused2)
  95 {
  96
  97   /* Don't let exceptions escape.  We're in the middle of a readline
  98      callback that isn't prepared for that.  */
  99   try
 100     {
 101       if (tui_active)
 102         {
 103           tui_disable ();
 104           rl_prep_terminal (0);
 105         }
 106       else
 107         {
 108           /* If tui_enable throws, we'll re-prep below.  */
 109           rl_deprep_terminal ();
 110           tui_enable ();
 111         }
 112     }
 113   catch (const gdb_exception &ex)
 114     {
 115       exception_print (gdb_stderr, ex);
 116
 117       if (!tui_active)
 118         rl_prep_terminal (0);
 119     }
 120
 121   /* Clear the readline in case switching occurred in middle of
 122      something.  */
 123   if (rl_end)
 124     rl_kill_text (0, rl_end);
 125
 126   /* Since we left the curses mode, the terminal mode is restored to
 127      some previous state.  That state may not be suitable for readline
 128      to work correctly (it may be restored in line mode).  We force an
 129      exit of the current readline so that readline is re-entered and
 130      it will be able to setup the terminal for its needs.  By
 131      re-entering in readline, we also redisplay its prompt in the
 132      non-curses mode.  */
 133   rl_newline (1, '\n');
 134
 135   /* Make sure the \n we are returning does not repeat the last
 136      command.  */
 137   dont_repeat ();
 138   return 0;
 139 }
 140
 141 /* TUI readline command.
 142    Change the TUI layout to show a next layout.
 143    This function is bound to CTRL-X 2.  It is intended to provide
 144    a functionality close to the Emacs split-window command.  We
 145    always show two windows (src+asm), (src+regs) or (asm+regs).  */
 146 static int
 147 tui_rl_change_windows (int notused1, int notused2)
 148 {
 149   if (!tui_active)
 150     tui_rl_switch_mode (0 /* notused */, 0 /* notused */);
 151
 152   if (tui_active)
 153     {
 154       enum tui_layout_type new_layout;
 155
 156       new_layout = tui_current_layout ();
 157
 158       /* Select a new layout to have a rolling layout behavior with
 159          always two windows (except when undefined).  */
 160       switch (new_layout)
 161         {
 162         case SRC_COMMAND:
 163           new_layout = SRC_DISASSEM_COMMAND;
 164           break;
 165
 166         case DISASSEM_COMMAND:
 167           new_layout = SRC_DISASSEM_COMMAND;
 168           break;
 169
 170         case SRC_DATA_COMMAND:
 171           new_layout = SRC_DISASSEM_COMMAND;
 172           break;
 173
 174         case SRC_DISASSEM_COMMAND:
 175           new_layout = DISASSEM_DATA_COMMAND;
 176           break;
 177
 178         case DISASSEM_DATA_COMMAND:
 179           new_layout = SRC_DATA_COMMAND;
 180           break;
 181
 182         default:
 183           new_layout = SRC_COMMAND;
 184           break;
 185         }
 186       tui_set_layout (new_layout);
 187     }
 188   return 0;
 189 }
 190
 191 /* TUI readline command.
 192    Delete the second TUI window to only show one.  */
 193 static int
 194 tui_rl_delete_other_windows (int notused1, int notused2)
 195 {
 196   if (!tui_active)
 197     tui_rl_switch_mode (0 /* notused */, 0 /* notused */);
 198
 199   if (tui_active)
 200     {
 201       enum tui_layout_type new_layout;
 202
 203       new_layout = tui_current_layout ();
 204
 205       /* Kill one window.  */
 206       switch (new_layout)
 207         {
 208         case SRC_COMMAND:
 209         case SRC_DATA_COMMAND:
 210         case SRC_DISASSEM_COMMAND:
 211         default:
 212           new_layout = SRC_COMMAND;
 213           break;
 214
 215         case DISASSEM_COMMAND:
 216         case DISASSEM_DATA_COMMAND:
 217           new_layout = DISASSEM_COMMAND;
 218           break;
 219         }
 220       tui_set_layout (new_layout);
 221     }
 222   return 0;
 223 }
 224
 225 /* TUI readline command.
 226    Switch the active window to give the focus to a next window.  */
 227 static int
 228 tui_rl_other_window (int count, int key)
 229 {
 230   struct tui_win_info *win_info;
 231
 232   if (!tui_active)
 233     tui_rl_switch_mode (0 /* notused */, 0 /* notused */);
 234
 235   win_info = tui_next_win (tui_win_with_focus ());
 236   if (win_info)
 237     {
 238       tui_set_win_focus_to (win_info);
 239       keypad (TUI_CMD_WIN->handle, (win_info != TUI_CMD_WIN));
 240     }
 241   return 0;
 242 }
 243
 244 /* TUI readline command.
 245    Execute the gdb command bound to the specified key.  */
 246 static int
 247 tui_rl_command_key (int count, int key)
 248 {
 249   int i;
 250
 251   reinitialize_more_filter ();
 252   for (i = 0; tui_commands[i].cmd; i++)
 253     {
 254       if (tui_commands[i].key == key)
 255         {
 256           /* Insert the command in the readline buffer.
 257              Avoid calling the gdb command here since it creates
 258              a possible recursion on readline if prompt_for_continue
 259              is called (See PR 9584).  The command will also appear
 260              in the readline history which turns out to be better.  */
 261           rl_insert_text (tui_commands[i].cmd);
 262           rl_newline (1, '\n');
 263
 264           /* Switch to gdb command mode while executing the command.
 265              This way the gdb's continue prompty will be displayed.  */
 266           tui_set_key_mode (TUI_ONE_COMMAND_MODE);
 267           return 0;
 268         }
 269     }
 270   return 0;
 271 }
 272
 273 /* TUI readline command.
 274    Temporarily leave the TUI SingleKey mode to allow editing
 275    a gdb command with the normal readline.  Once the command
 276    is executed, the TUI SingleKey mode is installed back.  */
 277 static int
 278 tui_rl_command_mode (int count, int key)
 279 {
 280   tui_set_key_mode (TUI_ONE_COMMAND_MODE);
 281   return rl_insert (count, key);
 282 }
 283
 284 /* TUI readline command.
 285    Switch between TUI SingleKey mode and gdb readline editing.  */
 286 static int
 287 tui_rl_next_keymap (int notused1, int notused2)
 288 {
 289   if (!tui_active)
 290     tui_rl_switch_mode (0 /* notused */, 0 /* notused */);
 291
 292   tui_set_key_mode (tui_current_key_mode == TUI_COMMAND_MODE
 293                     ? TUI_SINGLE_KEY_MODE : TUI_COMMAND_MODE);
 294   return 0;
 295 }
 296
 297 /* Readline hook to redisplay ourself the gdb prompt.
 298    In the SingleKey mode, the prompt is not printed so that
 299    the command window is cleaner.  It will be displayed if
 300    we temporarily leave the SingleKey mode.  */
 301 static int
 302 tui_rl_startup_hook (void)
 303 {
 304   rl_already_prompted = 1;
 305   if (tui_current_key_mode != TUI_COMMAND_MODE
 306       && !gdb_in_secondary_prompt_p (current_ui))
 307     tui_set_key_mode (TUI_SINGLE_KEY_MODE);
 308   tui_redisplay_readline ();
 309   return 0;
 310 }
 311
 312 /* Change the TUI key mode by installing the appropriate readline
 313    keymap.  */
 314 void
 315 tui_set_key_mode (enum tui_key_mode mode)
 316 {
 317   tui_current_key_mode = mode;
 318   rl_set_keymap (mode == TUI_SINGLE_KEY_MODE
 319                  ? tui_keymap : tui_readline_standard_keymap);
 320   tui_show_locator_content ();
 321 }
 322
 323 /* Initialize readline and configure the keymap for the switching
 324    key shortcut.  */
 325 void
 326 tui_initialize_readline (void)
 327 {
 328   int i;
 329   Keymap tui_ctlx_keymap;
 330
 331   rl_initialize ();
 332
 333   rl_add_defun ("tui-switch-mode", tui_rl_switch_mode, -1);
 334   rl_add_defun ("gdb-command", tui_rl_command_key, -1);
 335   rl_add_defun ("next-keymap", tui_rl_next_keymap, -1);
 336
 337   tui_keymap = rl_make_bare_keymap ();
 338   tui_ctlx_keymap = rl_make_bare_keymap ();
 339   tui_readline_standard_keymap = rl_get_keymap ();
 340
 341   for (i = 0; tui_commands[i].cmd; i++)
 342     rl_bind_key_in_map (tui_commands[i].key, tui_rl_command_key, tui_keymap);
 343
 344   rl_generic_bind (ISKMAP, "\\C-x", (char*) tui_ctlx_keymap, tui_keymap);
 345
 346   /* Bind all other keys to tui_rl_command_mode so that we switch
 347      temporarily from SingleKey mode and can enter a gdb command.  */
 348   for (i = ' '; i < 0x7f; i++)
 349     {
 350       int j;
 351
 352       for (j = 0; tui_commands[j].cmd; j++)
 353         if (tui_commands[j].key == i)
 354           break;
 355
 356       if (tui_commands[j].cmd)
 357         continue;
 358
 359       rl_bind_key_in_map (i, tui_rl_command_mode, tui_keymap);
 360     }
 361
 362   rl_bind_key_in_map ('a', tui_rl_switch_mode, emacs_ctlx_keymap);
 363   rl_bind_key_in_map ('a', tui_rl_switch_mode, tui_ctlx_keymap);
 364   rl_bind_key_in_map ('A', tui_rl_switch_mode, emacs_ctlx_keymap);
 365   rl_bind_key_in_map ('A', tui_rl_switch_mode, tui_ctlx_keymap);
 366   rl_bind_key_in_map (CTRL ('A'), tui_rl_switch_mode, emacs_ctlx_keymap);
 367   rl_bind_key_in_map (CTRL ('A'), tui_rl_switch_mode, tui_ctlx_keymap);
 368   rl_bind_key_in_map ('1', tui_rl_delete_other_windows, emacs_ctlx_keymap);
 369   rl_bind_key_in_map ('1', tui_rl_delete_other_windows, tui_ctlx_keymap);
 370   rl_bind_key_in_map ('2', tui_rl_change_windows, emacs_ctlx_keymap);
 371   rl_bind_key_in_map ('2', tui_rl_change_windows, tui_ctlx_keymap);
 372   rl_bind_key_in_map ('o', tui_rl_other_window, emacs_ctlx_keymap);
 373   rl_bind_key_in_map ('o', tui_rl_other_window, tui_ctlx_keymap);
 374   rl_bind_key_in_map ('q', tui_rl_next_keymap, tui_keymap);
 375   rl_bind_key_in_map ('s', tui_rl_next_keymap, emacs_ctlx_keymap);
 376   rl_bind_key_in_map ('s', tui_rl_next_keymap, tui_ctlx_keymap);
 377 }
 378
 379 /* Return the TERM variable from the environment, or "<unset>"
 380    if not set.  */
 381
 382 static const char *
 383 gdb_getenv_term (void)
 384 {
 385   const char *term;
 386
 387   term = getenv ("TERM");
 388   if (term != NULL)
 389     return term;
 390   return "<unset>";
 391 }
 392
 393 /* Enter in the tui mode (curses).
 394    When in normal mode, it installs the tui hooks in gdb, redirects
 395    the gdb output, configures the readline to work in tui mode.
 396    When in curses mode, it does nothing.  */
 397 void
 398 tui_enable (void)
 399 {
 400   if (tui_active)
 401     return;
 402
 403   /* To avoid to initialize curses when gdb starts, there is a defered
 404      curses initialization.  This initialization is made only once
 405      and the first time the curses mode is entered.  */
 406   if (tui_finish_init)
 407     {
 408       WINDOW *w;
 409       SCREEN *s;
 410 #ifndef __MINGW32__
 411        const char *cap;
 412 #endif
 413       const char *interp;
 414
 415       /* If the top level interpreter is not the console/tui (e.g.,
 416          MI), enabling curses will certainly lose.  */
 417       interp = top_level_interpreter ()->name ();
 418       if (strcmp (interp, INTERP_TUI) != 0)
 419         error (_("Cannot enable the TUI when the interpreter is '%s'"), interp);
 420
 421       /* Don't try to setup curses (and print funny control
 422          characters) if we're not outputting to a terminal.  */
 423       if (!ui_file_isatty (gdb_stdout))
 424         error (_("Cannot enable the TUI when output is not a terminal"));
 425
 426       s = newterm (NULL, stdout, stdin);
 427 #ifdef __MINGW32__
 428       /* The MinGW port of ncurses requires $TERM to be unset in order
 429          to activate the Windows console driver.  */
 430       if (s == NULL)
 431         s = newterm ((char *) "unknown", stdout, stdin);
 432 #endif
 433       if (s == NULL)
 434         {
 435           error (_("Cannot enable the TUI: error opening terminal [TERM=%s]"),
 436                  gdb_getenv_term ());
 437         }
 438       w = stdscr;
 439       if (has_colors ())
 440         {
 441 #ifdef HAVE_USE_DEFAULT_COLORS
 442           /* Ncurses extension to help with resetting to the default
 443              color.  */
 444           use_default_colors ();
 445 #endif
 446           start_color ();
 447         }
 448
 449       /* Check required terminal capabilities.  The MinGW port of
 450          ncurses does have them, but doesn't expose them through "cup".  */
 451 #ifndef __MINGW32__
 452       cap = tigetstr ((char *) "cup");
 453       if (cap == NULL || cap == (char *) -1 || *cap == '\0')
 454         {
 455           endwin ();
 456           delscreen (s);
 457           error (_("Cannot enable the TUI: "
 458                    "terminal doesn't support cursor addressing [TERM=%s]"),
 459                  gdb_getenv_term ());
 460         }
 461 #endif
 462
 463       cbreak ();
 464       noecho ();
 465       /* timeout (1); */
 466       nodelay(w, FALSE);
 467       nl();
 468       keypad (w, TRUE);
 469       rl_initialize ();
 470       tui_set_term_height_to (LINES);
 471       tui_set_term_width_to (COLS);
 472       def_prog_mode ();
 473
 474       tui_show_frame_info (0);
 475       tui_set_layout (SRC_COMMAND);
 476       tui_set_win_focus_to (TUI_SRC_WIN);
 477       keypad (TUI_CMD_WIN->handle, TRUE);
 478       wrefresh (TUI_CMD_WIN->handle);
 479       tui_finish_init = 0;
 480     }
 481   else
 482     {
 483      /* Save the current gdb setting of the terminal.
 484         Curses will restore this state when endwin() is called.  */
 485      def_shell_mode ();
 486      clearok (stdscr, TRUE);
 487    }
 488
 489   /* Install the TUI specific hooks.  */
 490   tui_install_hooks ();
 491   rl_startup_hook = tui_rl_startup_hook;
 492
 493   tui_update_variables ();
 494
 495   tui_setup_io (1);
 496
 497   tui_active = 1;
 498
 499   /* Resize windows before anything might display/refresh a
 500      window.  */
 501   if (tui_win_resized ())
 502     {
 503       tui_set_win_resized_to (FALSE);
 504       tui_resize_all ();
 505     }
 506
 507   if (deprecated_safe_get_selected_frame ())
 508     tui_show_frame_info (deprecated_safe_get_selected_frame ());
 509
 510   /* Restore TUI keymap.  */
 511   tui_set_key_mode (tui_current_key_mode);
 512
 513   /* Refresh the screen.  */
 514   tui_refresh_all_win ();
 515
 516   /* Update gdb's knowledge of its terminal.  */
 517   gdb_save_tty_state ();
 518   tui_update_gdb_sizes ();
 519 }
 520
 521 /* Leave the tui mode.
 522    Remove the tui hooks and configure the gdb output and readline
 523    back to their original state.  The curses mode is left so that
 524    the terminal setting is restored to the point when we entered.  */
 525 void
 526 tui_disable (void)
 527 {
 528   if (!tui_active)
 529     return;
 530
 531   /* Restore initial readline keymap.  */
 532   rl_set_keymap (tui_readline_standard_keymap);
 533
 534   /* Remove TUI hooks.  */
 535   tui_remove_hooks ();
 536   rl_startup_hook = 0;
 537   rl_already_prompted = 0;
 538
 539   /* Leave curses and restore previous gdb terminal setting.  */
 540   endwin ();
 541
 542   /* gdb terminal has changed, update gdb internal copy of it
 543      so that terminal management with the inferior works.  */
 544   tui_setup_io (0);
 545
 546   /* Update gdb's knowledge of its terminal.  */
 547   gdb_save_tty_state ();
 548
 549   tui_active = 0;
 550   tui_update_gdb_sizes ();
 551 }
 552
 553 /* Command wrapper for enabling tui mode.  */
 554
 555 static void
 556 tui_enable_command (const char *args, int from_tty)
 557 {
 558   tui_enable ();
 559 }
 560
 561 /* Command wrapper for leaving tui mode.  */
 562
 563 static void
 564 tui_disable_command (const char *args, int from_tty)
 565 {
 566   tui_disable ();
 567 }
 568
 569 void
 570 strcat_to_buf (char *buf, int buflen,
 571                const char *item_to_add)
 572 {
 573   if (item_to_add != NULL && buf != NULL)
 574     {
 575       if ((strlen (buf) + strlen (item_to_add)) <= buflen)
 576         strcat (buf, item_to_add);
 577       else
 578         strncat (buf, item_to_add, (buflen - strlen (buf)));
 579     }
 580 }
 581
 582 #if 0
 583 /* Solaris <sys/termios.h> defines CTRL.  */
 584 #ifndef CTRL
 585 #define CTRL(x)         (x & ~0140)
 586 #endif
 587
 588 #define FILEDES         2
 589 #define CHK(val, dft)   (val<=0 ? dft : val)
 590
 591 static void
 592 tui_reset (void)
 593 {
 594   struct termio mode;
 595
 596   /* Reset the teletype mode bits to a sensible state.
 597      Copied tset.c.  */
 598 #if defined (TIOCGETC)
 599   struct tchars tbuf;
 600 #endif /* TIOCGETC */
 601 #ifdef UCB_NTTY
 602   struct ltchars ltc;
 603
 604   if (ldisc == NTTYDISC)
 605     {
 606       ioctl (FILEDES, TIOCGLTC, &ltc);
 607       ltc.t_suspc = CHK (ltc.t_suspc, CTRL ('Z'));
 608       ltc.t_dsuspc = CHK (ltc.t_dsuspc, CTRL ('Y'));
 609       ltc.t_rprntc = CHK (ltc.t_rprntc, CTRL ('R'));
 610       ltc.t_flushc = CHK (ltc.t_flushc, CTRL ('O'));
 611       ltc.t_werasc = CHK (ltc.t_werasc, CTRL ('W'));
 612       ltc.t_lnextc = CHK (ltc.t_lnextc, CTRL ('V'));
 613       ioctl (FILEDES, TIOCSLTC, &ltc);
 614     }
 615 #endif /* UCB_NTTY */
 616 #ifdef TIOCGETC
 617   ioctl (FILEDES, TIOCGETC, &tbuf);
 618   tbuf.t_intrc = CHK (tbuf.t_intrc, CTRL ('?'));
 619   tbuf.t_quitc = CHK (tbuf.t_quitc, CTRL ('\\'));
 620   tbuf.t_startc = CHK (tbuf.t_startc, CTRL ('Q'));
 621   tbuf.t_stopc = CHK (tbuf.t_stopc, CTRL ('S'));
 622   tbuf.t_eofc = CHK (tbuf.t_eofc, CTRL ('D'));
 623   /* brkc is left alone.  */
 624   ioctl (FILEDES, TIOCSETC, &tbuf);
 625 #endif /* TIOCGETC */
 626   mode.sg_flags &= ~(RAW
 627 #ifdef CBREAK
 628                      | CBREAK
 629 #endif /* CBREAK */
 630                      | VTDELAY | ALLDELAY);
 631   mode.sg_flags |= XTABS | ECHO | CRMOD | ANYP;
 632
 633   return;
 634 }
 635 #endif
 636
 637 void
 638 tui_show_source (const char *fullname, int line)
 639 {
 640   struct symtab_and_line cursal = get_current_source_symtab_and_line ();
 641
 642   /* Make sure that the source window is displayed.  */
 643   tui_add_win_to_layout (SRC_WIN);
 644
 645   tui_update_source_windows_with_line (cursal.symtab, line);
 646   tui_update_locator_fullname (fullname);
 647 }
 648
 649 void
 650 tui_show_assembly (struct gdbarch *gdbarch, CORE_ADDR addr)
 651 {
 652   tui_add_win_to_layout (DISASSEM_WIN);
 653   tui_update_source_windows_with_addr (gdbarch, addr);
 654 }
 655
 656 bool
 657 tui_is_window_visible (enum tui_win_type type)
 658 {
 659   if (tui_active == 0)
 660     return false;
 661
 662   if (tui_win_list[type] == 0)
 663     return false;
 664
 665   return tui_win_list[type]->is_visible;
 666 }
 667
 668 int
 669 tui_get_command_dimension (unsigned int *width,
 670                            unsigned int *height)
 671 {
 672   if (!tui_active || (TUI_CMD_WIN == NULL))
 673     {
 674       return 0;
 675     }
 676
 677   *width = TUI_CMD_WIN->width;
 678   *height = TUI_CMD_WIN->height;
 679   return 1;
 680 }
 681
 682 void
 683 _initialize_tui (void)
 684 {
 685   struct cmd_list_element **tuicmd;
 686
 687   tuicmd = tui_get_cmd_list ();
 688
 689   add_cmd ("enable", class_tui, tui_enable_command,
 690            _("Enable TUI display mode."),
 691            tuicmd);
 692   add_cmd ("disable", class_tui, tui_disable_command,
 693            _("Disable TUI display mode."),
 694            tuicmd);
 695 }