1 /* $FreeBSD$ */
2 /* terminal.c -- controlling the terminal with termcap. */
3
4 /* Copyright (C) 1996-2006 Free Software Foundation, Inc.
5
6 This file is part of the GNU Readline Library, a library for
7 reading lines of text with interactive input and history editing.
8
9 The GNU Readline Library is free software; you can redistribute it
10 and/or modify it under the terms of the GNU General Public License
11 as published by the Free Software Foundation; either version 2, or
12 (at your option) any later version.
13
14 The GNU Readline Library is distributed in the hope that it will be
15 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
16 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 The GNU General Public License is often shipped with GNU software, and
20 is generally kept in a file called COPYING or LICENSE. If you do not
21 have a copy of the license, write to the Free Software Foundation,
22 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
23 #define READLINE_LIBRARY
24
25 #if defined (HAVE_CONFIG_H)
26 # include <config.h>
27 #endif
28
29 #include <sys/types.h>
30 #include "posixstat.h"
31 #include <fcntl.h>
32 #if defined (HAVE_SYS_FILE_H)
33 # include <sys/file.h>
34 #endif /* HAVE_SYS_FILE_H */
35
36 #if defined (HAVE_UNISTD_H)
37 # include <unistd.h>
38 #endif /* HAVE_UNISTD_H */
39
40 #if defined (HAVE_STDLIB_H)
41 # include <stdlib.h>
42 #else
43 # include "ansi_stdlib.h"
44 #endif /* HAVE_STDLIB_H */
45
46 #if defined (HAVE_LOCALE_H)
47 # include <locale.h>
48 #endif
49
50 #include <stdio.h>
51
52 /* System-specific feature definitions and include files. */
53 #include "rldefs.h"
54
55 #if defined (GWINSZ_IN_SYS_IOCTL) && !defined (TIOCGWINSZ)
56 # include <sys/ioctl.h>
57 #endif /* GWINSZ_IN_SYS_IOCTL && !TIOCGWINSZ */
58
59 #include "rltty.h"
60 #include "tcap.h"
61
62 /* Some standard library routines. */
63 #include "readline.h"
64 #include "history.h"
65
66 #include "rlprivate.h"
67 #include "rlshell.h"
68 #include "xmalloc.h"
69
70 #if defined (__MINGW32__)
71 # include <windows.h>
72 # include <wincon.h>
73
74 static void _win_get_screensize PARAMS((int *, int *));
75 #endif
76
77 #if defined (__EMX__)
78 static void _emx_get_screensize PARAMS((int *, int *));
79 #endif
80
81 #define CUSTOM_REDISPLAY_FUNC() (rl_redisplay_function != rl_redisplay)
82 #define CUSTOM_INPUT_FUNC() (rl_getc_function != rl_getc)
83
84 /* If the calling application sets this to a non-zero value, readline will
85 use the $LINES and $COLUMNS environment variables to set its idea of the
86 window size before interrogating the kernel. */
87 int rl_prefer_env_winsize = 0;
88
89 /* **************************************************************** */
90 /* */
91 /* Terminal and Termcap */
92 /* */
93 /* **************************************************************** */
94
95 static char *term_buffer = (char *)NULL;
96 static char *term_string_buffer = (char *)NULL;
97
98 static int tcap_initialized;
99
100 #if !defined (__linux__)
101 # if defined (__EMX__) || defined (NEED_EXTERN_PC)
102 extern
103 # endif /* __EMX__ || NEED_EXTERN_PC */
104 char PC, *BC, *UP;
105 #endif /* __linux__ */
106
107 /* Some strings to control terminal actions. These are output by tputs (). */
108 char *_rl_term_clreol;
109 char *_rl_term_clrpag;
110 char *_rl_term_cr;
111 char *_rl_term_backspace;
112 char *_rl_term_goto;
113 char *_rl_term_pc;
114
115 /* Non-zero if we determine that the terminal can do character insertion. */
116 int _rl_terminal_can_insert = 0;
117
118 /* How to insert characters. */
119 char *_rl_term_im;
120 char *_rl_term_ei;
121 char *_rl_term_ic;
122 char *_rl_term_ip;
123 char *_rl_term_IC;
124
125 /* How to delete characters. */
126 char *_rl_term_dc;
127 char *_rl_term_DC;
128
129 char *_rl_term_forward_char;
130
131 /* How to go up a line. */
132 char *_rl_term_up;
133
134 /* A visible bell; char if the terminal can be made to flash the screen. */
135 static char *_rl_visible_bell;
136
137 /* Non-zero means the terminal can auto-wrap lines. */
138 int _rl_term_autowrap = -1;
139
140 /* Non-zero means that this terminal has a meta key. */
141 static int term_has_meta;
142
143 /* The sequences to write to turn on and off the meta key, if this
144 terminal has one. */
145 static char *_rl_term_mm;
146 static char *_rl_term_mo;
147
148 /* The key sequences output by the arrow keys, if this terminal has any. */
149 static char *_rl_term_ku;
150 static char *_rl_term_kd;
151 static char *_rl_term_kr;
152 static char *_rl_term_kl;
153
154 /* How to initialize and reset the arrow keys, if this terminal has any. */
155 static char *_rl_term_ks;
156 static char *_rl_term_ke;
157
158 /* The key sequences sent by the Home and End keys, if any. */
159 static char *_rl_term_kh;
160 static char *_rl_term_kH;
161 static char *_rl_term_at7; /* @7 */
162
163 /* Delete key */
164 static char *_rl_term_kD;
165
166 /* Insert key */
167 static char *_rl_term_kI;
168
169 /* Cursor control */
170 static char *_rl_term_vs; /* very visible */
171 static char *_rl_term_ve; /* normal */
172
173 static void bind_termcap_arrow_keys PARAMS((Keymap));
174
175 /* Variables that hold the screen dimensions, used by the display code. */
176 int _rl_screenwidth, _rl_screenheight, _rl_screenchars;
177
178 /* Non-zero means the user wants to enable the keypad. */
179 int _rl_enable_keypad;
180
181 /* Non-zero means the user wants to enable a meta key. */
182 int _rl_enable_meta = 1;
183
184 #if defined (__EMX__)
185 static void
_emx_get_screensize(swp,shp)186 _emx_get_screensize (swp, shp)
187 int *swp, *shp;
188 {
189 int sz[2];
190
191 _scrsize (sz);
192
193 if (swp)
194 *swp = sz[0];
195 if (shp)
196 *shp = sz[1];
197 }
198 #endif
199
200 #if defined (__MINGW32__)
201 static void
_win_get_screensize(swp,shp)202 _win_get_screensize (swp, shp)
203 int *swp, *shp;
204 {
205 HANDLE hConOut;
206 CONSOLE_SCREEN_BUFFER_INFO scr;
207
208 hConOut = GetStdHandle (STD_OUTPUT_HANDLE);
209 if (hConOut != INVALID_HANDLE_VALUE)
210 {
211 if (GetConsoleScreenBufferInfo (hConOut, &scr))
212 {
213 *swp = scr.dwSize.X;
214 *shp = scr.srWindow.Bottom - scr.srWindow.Top + 1;
215 }
216 }
217 }
218 #endif
219
220 /* Get readline's idea of the screen size. TTY is a file descriptor open
221 to the terminal. If IGNORE_ENV is true, we do not pay attention to the
222 values of $LINES and $COLUMNS. The tests for TERM_STRING_BUFFER being
223 non-null serve to check whether or not we have initialized termcap. */
224 void
_rl_get_screen_size(tty,ignore_env)225 _rl_get_screen_size (tty, ignore_env)
226 int tty, ignore_env;
227 {
228 char *ss;
229 #if defined (TIOCGWINSZ)
230 struct winsize window_size;
231 #endif /* TIOCGWINSZ */
232 int wr, wc;
233
234 wr = wc = -1;
235 #if defined (TIOCGWINSZ)
236 if (ioctl (tty, TIOCGWINSZ, &window_size) == 0)
237 {
238 wc = (int) window_size.ws_col;
239 wr = (int) window_size.ws_row;
240 }
241 #endif /* TIOCGWINSZ */
242
243 #if defined (__EMX__)
244 _emx_get_screensize (&wc, &wr);
245 #elif defined (__MINGW32__)
246 _win_get_screensize (&wc, &wr);
247 #endif
248
249 if (ignore_env || rl_prefer_env_winsize == 0)
250 {
251 _rl_screenwidth = wc;
252 _rl_screenheight = wr;
253 }
254 else
255 _rl_screenwidth = _rl_screenheight = -1;
256
257 /* Environment variable COLUMNS overrides setting of "co" if IGNORE_ENV
258 is unset. If we prefer the environment, check it first before
259 assigning the value returned by the kernel. */
260 if (_rl_screenwidth <= 0)
261 {
262 if (ignore_env == 0 && (ss = sh_get_env_value ("COLUMNS")))
263 _rl_screenwidth = atoi (ss);
264
265 if (_rl_screenwidth <= 0)
266 _rl_screenwidth = wc;
267
268 #if !defined (__DJGPP__)
269 if (_rl_screenwidth <= 0 && term_string_buffer)
270 _rl_screenwidth = tgetnum ("co");
271 #endif
272 }
273
274 /* Environment variable LINES overrides setting of "li" if IGNORE_ENV
275 is unset. */
276 if (_rl_screenheight <= 0)
277 {
278 if (ignore_env == 0 && (ss = sh_get_env_value ("LINES")))
279 _rl_screenheight = atoi (ss);
280
281 if (_rl_screenheight <= 0)
282 _rl_screenheight = wr;
283
284 #if !defined (__DJGPP__)
285 if (_rl_screenheight <= 0 && term_string_buffer)
286 _rl_screenheight = tgetnum ("li");
287 #endif
288 }
289
290 /* If all else fails, default to 80x24 terminal. */
291 if (_rl_screenwidth <= 1)
292 _rl_screenwidth = 80;
293
294 if (_rl_screenheight <= 0)
295 _rl_screenheight = 24;
296
297 /* If we're being compiled as part of bash, set the environment
298 variables $LINES and $COLUMNS to new values. Otherwise, just
299 do a pair of putenv () or setenv () calls. */
300 sh_set_lines_and_columns (_rl_screenheight, _rl_screenwidth);
301
302 if (_rl_term_autowrap == 0)
303 _rl_screenwidth--;
304
305 _rl_screenchars = _rl_screenwidth * _rl_screenheight;
306 }
307
308 void
_rl_set_screen_size(rows,cols)309 _rl_set_screen_size (rows, cols)
310 int rows, cols;
311 {
312 if (_rl_term_autowrap == -1)
313 _rl_init_terminal_io (rl_terminal_name);
314
315 if (rows > 0)
316 _rl_screenheight = rows;
317 if (cols > 0)
318 {
319 _rl_screenwidth = cols;
320 if (_rl_term_autowrap == 0)
321 _rl_screenwidth--;
322 }
323
324 if (rows > 0 || cols > 0)
325 _rl_screenchars = _rl_screenwidth * _rl_screenheight;
326 }
327
328 void
rl_set_screen_size(rows,cols)329 rl_set_screen_size (rows, cols)
330 int rows, cols;
331 {
332 _rl_set_screen_size (rows, cols);
333 }
334
335 void
rl_get_screen_size(rows,cols)336 rl_get_screen_size (rows, cols)
337 int *rows, *cols;
338 {
339 if (rows)
340 *rows = _rl_screenheight;
341 if (cols)
342 *cols = _rl_screenwidth;
343 }
344
345 void
rl_reset_screen_size()346 rl_reset_screen_size ()
347 {
348 _rl_get_screen_size (fileno (rl_instream), 0);
349 }
350
351 void
rl_resize_terminal()352 rl_resize_terminal ()
353 {
354 if (readline_echoing_p)
355 {
356 _rl_get_screen_size (fileno (rl_instream), 1);
357 if (CUSTOM_REDISPLAY_FUNC ())
358 rl_forced_update_display ();
359 else
360 _rl_redisplay_after_sigwinch ();
361 }
362 }
363
364 struct _tc_string {
365 const char *tc_var;
366 char **tc_value;
367 };
368
369 /* This should be kept sorted, just in case we decide to change the
370 search algorithm to something smarter. */
371 static struct _tc_string tc_strings[] =
372 {
373 { "@7", &_rl_term_at7 },
374 { "DC", &_rl_term_DC },
375 { "IC", &_rl_term_IC },
376 { "ce", &_rl_term_clreol },
377 { "cl", &_rl_term_clrpag },
378 { "cr", &_rl_term_cr },
379 { "dc", &_rl_term_dc },
380 { "ei", &_rl_term_ei },
381 { "ic", &_rl_term_ic },
382 { "im", &_rl_term_im },
383 { "kD", &_rl_term_kD }, /* delete */
384 { "kH", &_rl_term_kH }, /* home down ?? */
385 { "kI", &_rl_term_kI }, /* insert */
386 { "kd", &_rl_term_kd },
387 { "ke", &_rl_term_ke }, /* end keypad mode */
388 { "kh", &_rl_term_kh }, /* home */
389 { "kl", &_rl_term_kl },
390 { "kr", &_rl_term_kr },
391 { "ks", &_rl_term_ks }, /* start keypad mode */
392 { "ku", &_rl_term_ku },
393 { "le", &_rl_term_backspace },
394 { "mm", &_rl_term_mm },
395 { "mo", &_rl_term_mo },
396 { "nd", &_rl_term_forward_char },
397 { "pc", &_rl_term_pc },
398 { "up", &_rl_term_up },
399 { "vb", &_rl_visible_bell },
400 { "vs", &_rl_term_vs },
401 { "ve", &_rl_term_ve },
402 };
403
404 #define NUM_TC_STRINGS (sizeof (tc_strings) / sizeof (struct _tc_string))
405
406 /* Read the desired terminal capability strings into BP. The capabilities
407 are described in the TC_STRINGS table. */
408 static void
get_term_capabilities(bp)409 get_term_capabilities (bp)
410 char **bp;
411 {
412 #if !defined (__DJGPP__) /* XXX - doesn't DJGPP have a termcap library? */
413 register int i;
414
415 for (i = 0; i < NUM_TC_STRINGS; i++)
416 *(tc_strings[i].tc_value) = tgetstr ((char *)tc_strings[i].tc_var, bp);
417 #endif
418 tcap_initialized = 1;
419 }
420
421 int
_rl_init_terminal_io(terminal_name)422 _rl_init_terminal_io (terminal_name)
423 const char *terminal_name;
424 {
425 const char *term;
426 char *buffer;
427 int tty, tgetent_ret;
428
429 term = terminal_name ? terminal_name : sh_get_env_value ("TERM");
430 _rl_term_clrpag = _rl_term_cr = _rl_term_clreol = (char *)NULL;
431 tty = rl_instream ? fileno (rl_instream) : 0;
432
433 if (term == 0)
434 term = "dumb";
435
436 /* I've separated this out for later work on not calling tgetent at all
437 if the calling application has supplied a custom redisplay function,
438 (and possibly if the application has supplied a custom input function). */
439 if (CUSTOM_REDISPLAY_FUNC())
440 {
441 tgetent_ret = -1;
442 }
443 else
444 {
445 if (term_string_buffer == 0)
446 term_string_buffer = (char *)xmalloc(2032);
447
448 if (term_buffer == 0)
449 term_buffer = (char *)xmalloc(4080);
450
451 buffer = term_string_buffer;
452
453 tgetent_ret = tgetent (term_buffer, term);
454 }
455
456 if (tgetent_ret <= 0)
457 {
458 FREE (term_string_buffer);
459 FREE (term_buffer);
460 buffer = term_buffer = term_string_buffer = (char *)NULL;
461
462 _rl_term_autowrap = 0; /* used by _rl_get_screen_size */
463
464 /* Allow calling application to set default height and width, using
465 rl_set_screen_size */
466 if (_rl_screenwidth <= 0 || _rl_screenheight <= 0)
467 {
468 #if defined (__EMX__)
469 _emx_get_screensize (&_rl_screenwidth, &_rl_screenheight);
470 _rl_screenwidth--;
471 #else /* !__EMX__ */
472 _rl_get_screen_size (tty, 0);
473 #endif /* !__EMX__ */
474 }
475
476 /* Defaults. */
477 if (_rl_screenwidth <= 0 || _rl_screenheight <= 0)
478 {
479 _rl_screenwidth = 79;
480 _rl_screenheight = 24;
481 }
482
483 /* Everything below here is used by the redisplay code (tputs). */
484 _rl_screenchars = _rl_screenwidth * _rl_screenheight;
485 _rl_term_cr = "\r";
486 _rl_term_im = _rl_term_ei = _rl_term_ic = _rl_term_IC = (char *)NULL;
487 _rl_term_up = _rl_term_dc = _rl_term_DC = _rl_visible_bell = (char *)NULL;
488 _rl_term_ku = _rl_term_kd = _rl_term_kl = _rl_term_kr = (char *)NULL;
489 _rl_term_kh = _rl_term_kH = _rl_term_kI = _rl_term_kD = (char *)NULL;
490 _rl_term_ks = _rl_term_ke = _rl_term_at7 = (char *)NULL;
491 _rl_term_mm = _rl_term_mo = (char *)NULL;
492 _rl_term_ve = _rl_term_vs = (char *)NULL;
493 _rl_term_forward_char = (char *)NULL;
494 _rl_terminal_can_insert = term_has_meta = 0;
495
496 /* Reasonable defaults for tgoto(). Readline currently only uses
497 tgoto if _rl_term_IC or _rl_term_DC is defined, but just in case we
498 change that later... */
499 PC = '\0';
500 BC = _rl_term_backspace = "\b";
501 UP = _rl_term_up;
502
503 return 0;
504 }
505
506 get_term_capabilities (&buffer);
507
508 /* Set up the variables that the termcap library expects the application
509 to provide. */
510 PC = _rl_term_pc ? *_rl_term_pc : 0;
511 BC = _rl_term_backspace;
512 UP = _rl_term_up;
513
514 if (!_rl_term_cr)
515 _rl_term_cr = "\r";
516
517 _rl_term_autowrap = tgetflag ("am") && tgetflag ("xn");
518
519 /* Allow calling application to set default height and width, using
520 rl_set_screen_size */
521 if (_rl_screenwidth <= 0 || _rl_screenheight <= 0)
522 _rl_get_screen_size (tty, 0);
523
524 /* "An application program can assume that the terminal can do
525 character insertion if *any one of* the capabilities `IC',
526 `im', `ic' or `ip' is provided." But we can't do anything if
527 only `ip' is provided, so... */
528 _rl_terminal_can_insert = (_rl_term_IC || _rl_term_im || _rl_term_ic);
529
530 /* Check to see if this terminal has a meta key and clear the capability
531 variables if there is none. */
532 term_has_meta = (tgetflag ("km") || tgetflag ("MT"));
533 if (!term_has_meta)
534 _rl_term_mm = _rl_term_mo = (char *)NULL;
535
536 /* Attempt to find and bind the arrow keys. Do not override already
537 bound keys in an overzealous attempt, however. */
538
539 bind_termcap_arrow_keys (emacs_standard_keymap);
540
541 #if defined (VI_MODE)
542 bind_termcap_arrow_keys (vi_movement_keymap);
543 bind_termcap_arrow_keys (vi_insertion_keymap);
544 #endif /* VI_MODE */
545
546 return 0;
547 }
548
549 /* Bind the arrow key sequences from the termcap description in MAP. */
550 static void
bind_termcap_arrow_keys(map)551 bind_termcap_arrow_keys (map)
552 Keymap map;
553 {
554 Keymap xkeymap;
555
556 xkeymap = _rl_keymap;
557 _rl_keymap = map;
558
559 rl_bind_keyseq_if_unbound (_rl_term_ku, rl_get_previous_history);
560 rl_bind_keyseq_if_unbound (_rl_term_kd, rl_get_next_history);
561 rl_bind_keyseq_if_unbound (_rl_term_kr, rl_forward_char);
562 rl_bind_keyseq_if_unbound (_rl_term_kl, rl_backward_char);
563
564 rl_bind_keyseq_if_unbound (_rl_term_kh, rl_beg_of_line); /* Home */
565 rl_bind_keyseq_if_unbound (_rl_term_at7, rl_end_of_line); /* End */
566
567 rl_bind_keyseq_if_unbound (_rl_term_kD, rl_delete);
568
569 _rl_keymap = xkeymap;
570 }
571
572 char *
rl_get_termcap(cap)573 rl_get_termcap (cap)
574 const char *cap;
575 {
576 register int i;
577
578 if (tcap_initialized == 0)
579 return ((char *)NULL);
580 for (i = 0; i < NUM_TC_STRINGS; i++)
581 {
582 if (tc_strings[i].tc_var[0] == cap[0] && strcmp (tc_strings[i].tc_var, cap) == 0)
583 return *(tc_strings[i].tc_value);
584 }
585 return ((char *)NULL);
586 }
587
588 /* Re-initialize the terminal considering that the TERM/TERMCAP variable
589 has changed. */
590 int
rl_reset_terminal(terminal_name)591 rl_reset_terminal (terminal_name)
592 const char *terminal_name;
593 {
594 _rl_screenwidth = _rl_screenheight = 0;
595 _rl_init_terminal_io (terminal_name);
596 return 0;
597 }
598
599 /* A function for the use of tputs () */
600 #ifdef _MINIX
601 void
_rl_output_character_function(c)602 _rl_output_character_function (c)
603 int c;
604 {
605 putc (c, _rl_out_stream);
606 }
607 #else /* !_MINIX */
608 int
_rl_output_character_function(c)609 _rl_output_character_function (c)
610 int c;
611 {
612 return putc (c, _rl_out_stream);
613 }
614 #endif /* !_MINIX */
615
616 /* Write COUNT characters from STRING to the output stream. */
617 void
_rl_output_some_chars(string,count)618 _rl_output_some_chars (string, count)
619 const char *string;
620 int count;
621 {
622 fwrite (string, 1, count, _rl_out_stream);
623 }
624
625 /* Move the cursor back. */
626 int
_rl_backspace(count)627 _rl_backspace (count)
628 int count;
629 {
630 register int i;
631
632 if (_rl_term_backspace)
633 for (i = 0; i < count; i++)
634 tputs (_rl_term_backspace, 1, _rl_output_character_function);
635 else
636 for (i = 0; i < count; i++)
637 putc ('\b', _rl_out_stream);
638 return 0;
639 }
640
641 /* Move to the start of the next line. */
642 int
rl_crlf()643 rl_crlf ()
644 {
645 #if defined (NEW_TTY_DRIVER)
646 if (_rl_term_cr)
647 tputs (_rl_term_cr, 1, _rl_output_character_function);
648 #endif /* NEW_TTY_DRIVER */
649 putc ('\n', _rl_out_stream);
650 return 0;
651 }
652
653 /* Ring the terminal bell. */
654 int
rl_ding()655 rl_ding ()
656 {
657 if (readline_echoing_p)
658 {
659 switch (_rl_bell_preference)
660 {
661 case NO_BELL:
662 default:
663 break;
664 case VISIBLE_BELL:
665 if (_rl_visible_bell)
666 {
667 tputs (_rl_visible_bell, 1, _rl_output_character_function);
668 break;
669 }
670 /* FALLTHROUGH */
671 case AUDIBLE_BELL:
672 fprintf (stderr, "\007");
673 fflush (stderr);
674 break;
675 }
676 return (0);
677 }
678 return (-1);
679 }
680
681 /* **************************************************************** */
682 /* */
683 /* Controlling the Meta Key and Keypad */
684 /* */
685 /* **************************************************************** */
686
687 void
_rl_enable_meta_key()688 _rl_enable_meta_key ()
689 {
690 #if !defined (__DJGPP__)
691 if (term_has_meta && _rl_term_mm)
692 tputs (_rl_term_mm, 1, _rl_output_character_function);
693 #endif
694 }
695
696 void
_rl_control_keypad(on)697 _rl_control_keypad (on)
698 int on;
699 {
700 #if !defined (__DJGPP__)
701 if (on && _rl_term_ks)
702 tputs (_rl_term_ks, 1, _rl_output_character_function);
703 else if (!on && _rl_term_ke)
704 tputs (_rl_term_ke, 1, _rl_output_character_function);
705 #endif
706 }
707
708 /* **************************************************************** */
709 /* */
710 /* Controlling the Cursor */
711 /* */
712 /* **************************************************************** */
713
714 /* Set the cursor appropriately depending on IM, which is one of the
715 insert modes (insert or overwrite). Insert mode gets the normal
716 cursor. Overwrite mode gets a very visible cursor. Only does
717 anything if we have both capabilities. */
718 void
_rl_set_cursor(im,force)719 _rl_set_cursor (im, force)
720 int im, force;
721 {
722 if (_rl_term_ve && _rl_term_vs)
723 {
724 if (force || im != rl_insert_mode)
725 {
726 if (im == RL_IM_OVERWRITE)
727 tputs (_rl_term_vs, 1, _rl_output_character_function);
728 else
729 tputs (_rl_term_ve, 1, _rl_output_character_function);
730 }
731 }
732 }
733