428
+ − 1 /* TTY console functions.
+ − 2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
+ − 3 Copyright (C) 1994, 1995 Free Software Foundation, Inc.
800
+ − 4 Copyright (C) 1996, 2001, 2002 Ben Wing.
428
+ − 5
+ − 6 This file is part of XEmacs.
+ − 7
+ − 8 XEmacs is free software; you can redistribute it and/or modify it
+ − 9 under the terms of the GNU General Public License as published by the
+ − 10 Free Software Foundation; either version 2, or (at your option) any
+ − 11 later version.
+ − 12
+ − 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ − 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ − 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ − 16 for more details.
+ − 17
+ − 18 You should have received a copy of the GNU General Public License
+ − 19 along with XEmacs; see the file COPYING. If not, write to
+ − 20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ − 21 Boston, MA 02111-1307, USA. */
+ − 22
+ − 23 /* Synched up with: Not in FSF. */
+ − 24
+ − 25 /* Authors: Ben Wing and Chuck Thompson. */
+ − 26
+ − 27 #include <config.h>
+ − 28 #include "lisp.h"
+ − 29
872
+ − 30 #include "console-tty-impl.h"
428
+ − 31 #include "console-stream.h"
872
+ − 32
2828
+ − 33 #include "elhash.h"
428
+ − 34 #include "faces.h"
872
+ − 35 #include "file-coding.h"
428
+ − 36 #include "frame.h"
872
+ − 37 #include "glyphs.h"
428
+ − 38 #include "lstream.h"
872
+ − 39 #include "process.h"
+ − 40
428
+ − 41 #include "sysdep.h"
+ − 42 #include "sysfile.h"
+ − 43
+ − 44 DEFINE_CONSOLE_TYPE (tty);
+ − 45 DECLARE_IMAGE_INSTANTIATOR_FORMAT (nothing);
+ − 46 DECLARE_IMAGE_INSTANTIATOR_FORMAT (string);
+ − 47 DECLARE_IMAGE_INSTANTIATOR_FORMAT (formatted_string);
+ − 48 DECLARE_IMAGE_INSTANTIATOR_FORMAT (inherit);
+ − 49
+ − 50 Lisp_Object Qterminal_type;
+ − 51 Lisp_Object Qcontrolling_process;
+ − 52
2850
+ − 53 Lisp_Object Vtty_seen_characters;
2828
+ − 54
1204
+ − 55 static const struct memory_description tty_console_data_description_1 [] = {
+ − 56 { XD_LISP_OBJECT, offsetof (struct tty_console, terminal_type) },
+ − 57 { XD_LISP_OBJECT, offsetof (struct tty_console, instream) },
+ − 58 { XD_LISP_OBJECT, offsetof (struct tty_console, outstream) },
+ − 59 { XD_END }
+ − 60 };
+ − 61
3092
+ − 62 #ifdef NEW_GC
+ − 63 DEFINE_LRECORD_IMPLEMENTATION ("tty-console", tty_console,
+ − 64 1, /*dumpable-flag*/
+ − 65 0, 0, 0, 0, 0,
+ − 66 tty_console_data_description_1,
+ − 67 Lisp_Tty_Console);
+ − 68 #else /* not NEW_GC */
1204
+ − 69 const struct sized_memory_description tty_console_data_description = {
+ − 70 sizeof (struct tty_console), tty_console_data_description_1
+ − 71 };
3092
+ − 72 #endif /* not NEW_GC */
1204
+ − 73
428
+ − 74
+ − 75 static void
+ − 76 allocate_tty_console_struct (struct console *con)
+ − 77 {
+ − 78 /* zero out all slots except the lisp ones ... */
3092
+ − 79 #ifdef NEW_GC
+ − 80 CONSOLE_TTY_DATA (con) = alloc_lrecord_type (struct tty_console,
+ − 81 &lrecord_tty_console);
+ − 82 #else /* not NEW_GC */
428
+ − 83 CONSOLE_TTY_DATA (con) = xnew_and_zero (struct tty_console);
3092
+ − 84 #endif /* not NEW_GC */
428
+ − 85 CONSOLE_TTY_DATA (con)->terminal_type = Qnil;
+ − 86 CONSOLE_TTY_DATA (con)->instream = Qnil;
+ − 87 CONSOLE_TTY_DATA (con)->outstream = Qnil;
+ − 88 }
+ − 89
+ − 90 static void
+ − 91 tty_init_console (struct console *con, Lisp_Object props)
+ − 92 {
+ − 93 Lisp_Object tty = CONSOLE_CONNECTION (con);
+ − 94 Lisp_Object terminal_type = Qnil;
+ − 95 Lisp_Object controlling_process = Qnil;
+ − 96 struct tty_console *tty_con;
+ − 97 struct gcpro gcpro1, gcpro2;
+ − 98
+ − 99 GCPRO2 (terminal_type, controlling_process);
+ − 100
+ − 101 terminal_type = Fplist_get (props, Qterminal_type, Qnil);
+ − 102 controlling_process = Fplist_get (props, Qcontrolling_process, Qnil);
+ − 103
+ − 104 /* Determine the terminal type */
+ − 105
+ − 106 if (!NILP (terminal_type))
+ − 107 CHECK_STRING (terminal_type);
+ − 108 else
+ − 109 {
867
+ − 110 Ibyte *temp_type = egetenv ("TERM");
428
+ − 111
+ − 112 if (!temp_type)
+ − 113 {
563
+ − 114 invalid_state ("Cannot determine terminal type", Qunbound);
428
+ − 115 }
+ − 116 else
771
+ − 117 terminal_type = build_intstring (temp_type);
428
+ − 118 }
+ − 119
+ − 120 /* Determine the controlling process */
+ − 121 if (!NILP (controlling_process))
+ − 122 CHECK_INT (controlling_process);
+ − 123
+ − 124 /* Open the specified console */
+ − 125
+ − 126 allocate_tty_console_struct (con);
+ − 127 tty_con = CONSOLE_TTY_DATA (con);
+ − 128
+ − 129 if (internal_equal (tty, Vstdio_str, 0))
+ − 130 {
+ − 131 tty_con->infd = fileno (stdin);
+ − 132 tty_con->outfd = fileno (stdout);
+ − 133 tty_con->is_stdio = 1;
+ − 134 }
+ − 135 else
+ − 136 {
+ − 137 tty_con->infd = tty_con->outfd =
771
+ − 138 qxe_open (XSTRING_DATA (tty), O_RDWR);
428
+ − 139 if (tty_con->infd < 0)
563
+ − 140 signal_error (Qio_error, "Unable to open tty", tty);
428
+ − 141 tty_con->is_stdio = 0;
+ − 142 }
+ − 143
802
+ − 144 /* set_descriptor_non_blocking (tty_con->infd); */
428
+ − 145 tty_con->instream = make_filedesc_input_stream (tty_con->infd, 0, -1, 0);
771
+ − 146 Lstream_set_buffering (XLSTREAM (tty_con->instream), LSTREAM_UNBUFFERED, 0);
428
+ − 147 tty_con->instream =
771
+ − 148 make_coding_input_stream (XLSTREAM (tty_con->instream),
+ − 149 get_coding_system_for_text_file (Qkeyboard, 0),
814
+ − 150 CODING_DECODE,
+ − 151 LSTREAM_FL_READ_ONE_BYTE_AT_A_TIME);
771
+ − 152 Lstream_set_buffering (XLSTREAM (tty_con->instream), LSTREAM_UNBUFFERED, 0);
+ − 153 tty_con->outstream = make_filedesc_output_stream (tty_con->outfd, 0, -1, 0);
428
+ − 154 tty_con->outstream =
771
+ − 155 make_coding_output_stream (XLSTREAM (tty_con->outstream),
+ − 156 get_coding_system_for_text_file (Qterminal, 0),
800
+ − 157 CODING_ENCODE, 0);
428
+ − 158 tty_con->terminal_type = terminal_type;
+ − 159 tty_con->controlling_process = controlling_process;
+ − 160
3571
+ − 161 /* Defaults to 1 with Mule, 0 without. In the latter case the attribute is
+ − 162 read-only from Lisp. */
+ − 163 tty_con->multiple_width = CONSOLE_TTY_SUPPORTS_MULTIPLE_WIDTH(c);
+ − 164
428
+ − 165 if (NILP (CONSOLE_NAME (con)))
+ − 166 CONSOLE_NAME (con) = Ffile_name_nondirectory (tty);
+ − 167 {
442
+ − 168 pid_t tty_pg;
+ − 169 pid_t controlling_tty_pg;
428
+ − 170 int cfd;
+ − 171
+ − 172 /* OK, the only sure-fire way I can think of to determine
+ − 173 whether a particular TTY is our controlling TTY is to check
+ − 174 if it has the same foreground process group as our controlling
+ − 175 TTY. This is OK because a process group can never simultaneously
+ − 176 be the foreground process group of two TTY's (in that case it
+ − 177 would have two controlling TTY's, which is not allowed). */
+ − 178
+ − 179 EMACS_GET_TTY_PROCESS_GROUP (tty_con->infd, &tty_pg);
867
+ − 180 cfd = qxe_open ((Ibyte *) "/dev/tty", O_RDWR, 0);
428
+ − 181 EMACS_GET_TTY_PROCESS_GROUP (cfd, &controlling_tty_pg);
771
+ − 182 retry_close (cfd);
428
+ − 183 if (tty_pg == controlling_tty_pg)
+ − 184 {
+ − 185 tty_con->controlling_terminal = 1;
793
+ − 186 Vcontrolling_terminal = wrap_console (con);
428
+ − 187 munge_tty_process_group ();
+ − 188 }
+ − 189 else
+ − 190 tty_con->controlling_terminal = 0;
+ − 191 }
+ − 192
+ − 193 UNGCPRO;
+ − 194 }
+ − 195
+ − 196 static void
+ − 197 tty_mark_console (struct console *con)
+ − 198 {
+ − 199 struct tty_console *tty_con = CONSOLE_TTY_DATA (con);
+ − 200 mark_object (tty_con->terminal_type);
+ − 201 mark_object (tty_con->instream);
+ − 202 mark_object (tty_con->outstream);
+ − 203 }
+ − 204
+ − 205 static int
2286
+ − 206 tty_initially_selected_for_input (struct console *UNUSED (con))
428
+ − 207 {
+ − 208 return 1;
+ − 209 }
+ − 210
+ − 211 static void
+ − 212 free_tty_console_struct (struct console *con)
+ − 213 {
+ − 214 struct tty_console *tty_con = CONSOLE_TTY_DATA (con);
+ − 215 if (tty_con)
+ − 216 {
+ − 217 if (tty_con->term_entry_buffer) /* allocated in term_init () */
+ − 218 {
1726
+ − 219 xfree (tty_con->term_entry_buffer, char *);
428
+ − 220 tty_con->term_entry_buffer = NULL;
+ − 221 }
4117
+ − 222 #ifndef NEW_GC
1726
+ − 223 xfree (tty_con, struct tty_console *);
3092
+ − 224 #endif /* not NEW_GC */
428
+ − 225 CONSOLE_TTY_DATA (con) = NULL;
+ − 226 }
+ − 227 }
+ − 228
+ − 229 static void
+ − 230 tty_delete_console (struct console *con)
+ − 231 {
+ − 232 Lstream_close (XLSTREAM (CONSOLE_TTY_DATA (con)->instream));
+ − 233 Lstream_close (XLSTREAM (CONSOLE_TTY_DATA (con)->outstream));
+ − 234 if (!CONSOLE_TTY_DATA (con)->is_stdio)
771
+ − 235 retry_close (CONSOLE_TTY_DATA (con)->infd);
428
+ − 236 if (CONSOLE_TTY_DATA (con)->controlling_terminal)
+ − 237 {
+ − 238 Vcontrolling_terminal = Qnil;
+ − 239 unmunge_tty_process_group ();
+ − 240 }
+ − 241 free_tty_console_struct (con);
+ − 242 }
+ − 243
+ − 244
+ − 245 static struct console *
+ − 246 decode_tty_console (Lisp_Object console)
+ − 247 {
793
+ − 248 console = wrap_console (decode_console (console));
428
+ − 249 CHECK_TTY_CONSOLE (console);
+ − 250 return XCONSOLE (console);
+ − 251 }
+ − 252
+ − 253 DEFUN ("console-tty-terminal-type", Fconsole_tty_terminal_type,
+ − 254 0, 1, 0, /*
+ − 255 Return the terminal type of TTY console CONSOLE.
+ − 256 */
+ − 257 (console))
+ − 258 {
+ − 259 return CONSOLE_TTY_DATA (decode_tty_console (console))->terminal_type;
+ − 260 }
+ − 261
+ − 262 DEFUN ("console-tty-controlling-process", Fconsole_tty_controlling_process,
+ − 263 0, 1, 0, /*
+ − 264 Return the controlling process of tty console CONSOLE.
+ − 265 */
+ − 266 (console))
+ − 267 {
+ − 268 return CONSOLE_TTY_DATA (decode_tty_console (console))->controlling_process;
+ − 269 }
+ − 270
+ − 271
+ − 272 DEFUN ("console-tty-input-coding-system", Fconsole_tty_input_coding_system,
+ − 273 0, 1, 0, /*
+ − 274 Return the input coding system of tty console CONSOLE.
+ − 275 */
+ − 276 (console))
+ − 277 {
771
+ − 278 return coding_stream_detected_coding_system
428
+ − 279 (XLSTREAM (CONSOLE_TTY_DATA (decode_tty_console (console))->instream));
+ − 280 }
+ − 281
+ − 282 DEFUN ("set-console-tty-input-coding-system", Fset_console_tty_input_coding_system,
+ − 283 0, 2, 0, /*
+ − 284 Set the input coding system of tty console CONSOLE to CODESYS.
+ − 285 CONSOLE defaults to the selected console.
+ − 286 CODESYS defaults to the value of `keyboard-coding-system'.
+ − 287 */
+ − 288 (console, codesys))
+ − 289 {
771
+ − 290 set_coding_stream_coding_system
428
+ − 291 (XLSTREAM (CONSOLE_TTY_DATA (decode_tty_console (console))->instream),
771
+ − 292 get_coding_system_for_text_file (NILP (codesys) ? Qkeyboard : codesys,
+ − 293 0));
428
+ − 294 return Qnil;
+ − 295 }
+ − 296
+ − 297 DEFUN ("console-tty-output-coding-system", Fconsole_tty_output_coding_system,
+ − 298 0, 1, 0, /*
+ − 299 Return TTY CONSOLE's output coding system.
+ − 300 */
+ − 301 (console))
+ − 302 {
771
+ − 303 return coding_stream_coding_system
428
+ − 304 (XLSTREAM (CONSOLE_TTY_DATA (decode_tty_console (console))->outstream));
+ − 305 }
+ − 306
+ − 307 DEFUN ("set-console-tty-output-coding-system", Fset_console_tty_output_coding_system,
+ − 308 0, 2, 0, /*
+ − 309 Set the coding system of tty output of console CONSOLE to CODESYS.
+ − 310 CONSOLE defaults to the selected console.
+ − 311 CODESYS defaults to the value of `terminal-coding-system'.
+ − 312 */
+ − 313 (console, codesys))
+ − 314 {
771
+ − 315 set_coding_stream_coding_system
428
+ − 316 (XLSTREAM (CONSOLE_TTY_DATA (decode_tty_console (console))->outstream),
771
+ − 317 get_coding_system_for_text_file (NILP (codesys) ? Qterminal : codesys,
+ − 318 0));
438
+ − 319 /* Redraw tty */
+ − 320 face_property_was_changed (Vdefault_face, Qfont, Qtty);
428
+ − 321 return Qnil;
+ − 322 }
+ − 323
3571
+ − 324 DEFUN ("console-tty-multiple-width", Fconsole_tty_multiple_width,
+ − 325 0, 1, 0, /*
+ − 326 Return whether CONSOLE treats East Asian double-width chars as such.
+ − 327
+ − 328 CONSOLE defaults to the selected console. Without XEmacs support for
+ − 329 double-width characters, this always gives nil.
+ − 330 */
+ − 331 (console))
+ − 332 {
+ − 333 return CONSOLE_TTY_MULTIPLE_WIDTH (decode_tty_console(console))
+ − 334 ? Qt : Qnil;
+ − 335 }
+ − 336
+ − 337 DEFUN ("set-console-tty-multiple-width", Fset_console_tty_multiple_width,
+ − 338 0, 2, 0, /*
+ − 339 Set whether CONSOLE treats East Asian double-width characters as such.
+ − 340
+ − 341 CONSOLE defaults to the selected console, and VALUE defaults to nil.
+ − 342 Without XEmacs support for double-width characters, this throws an error if
+ − 343 VALUE is non-nil.
+ − 344 */
+ − 345 (console, value))
+ − 346 {
+ − 347 struct console *c = decode_tty_console (console);
+ − 348
+ − 349 /* So people outside of East Asia can put (set-console-tty-multiple-width
+ − 350 (selected-console) nil) in their init files, independent of whether
+ − 351 Mule is enabled. */
+ − 352 if (!CONSOLE_TTY_MULTIPLE_WIDTH (c) && NILP(value))
+ − 353 {
+ − 354 return Qnil;
+ − 355 }
+ − 356
+ − 357 if (!CONSOLE_TTY_SUPPORTS_MULTIPLE_WIDTH (c))
+ − 358 {
+ − 359 invalid_change
+ − 360 ("No console support for double-width chars",
+ − 361 Fmake_symbol(CONSOLE_NAME(c)));
+ − 362 }
+ − 363
+ − 364 CONSOLE_TTY_DATA(c)->multiple_width = NILP(value) ? 0 : 1;
+ − 365
+ − 366 return Qnil;
+ − 367 }
+ − 368
440
+ − 369 /* #### Move this function to lisp */
428
+ − 370 DEFUN ("set-console-tty-coding-system", Fset_console_tty_coding_system,
+ − 371 0, 2, 0, /*
+ − 372 Set the input and output coding systems of tty console CONSOLE to CODESYS.
+ − 373 CONSOLE defaults to the selected console.
+ − 374 If CODESYS is nil, the values of `keyboard-coding-system' and
+ − 375 `terminal-coding-system' will be used for the input and
+ − 376 output coding systems of CONSOLE.
+ − 377 */
+ − 378 (console, codesys))
+ − 379 {
+ − 380 Fset_console_tty_input_coding_system (console, codesys);
+ − 381 Fset_console_tty_output_coding_system (console, codesys);
+ − 382 return Qnil;
+ − 383 }
+ − 384
+ − 385
+ − 386 Lisp_Object
+ − 387 tty_semi_canonicalize_console_connection (Lisp_Object connection,
578
+ − 388 Error_Behavior errb)
428
+ − 389 {
+ − 390 return stream_semi_canonicalize_console_connection (connection, errb);
+ − 391 }
+ − 392
+ − 393 Lisp_Object
+ − 394 tty_canonicalize_console_connection (Lisp_Object connection,
578
+ − 395 Error_Behavior errb)
428
+ − 396 {
+ − 397 return stream_canonicalize_console_connection (connection, errb);
+ − 398 }
+ − 399
+ − 400 Lisp_Object
+ − 401 tty_semi_canonicalize_device_connection (Lisp_Object connection,
578
+ − 402 Error_Behavior errb)
428
+ − 403 {
+ − 404 return stream_semi_canonicalize_console_connection (connection, errb);
+ − 405 }
+ − 406
+ − 407 Lisp_Object
+ − 408 tty_canonicalize_device_connection (Lisp_Object connection,
578
+ − 409 Error_Behavior errb)
428
+ − 410 {
+ − 411 return stream_canonicalize_console_connection (connection, errb);
+ − 412 }
+ − 413
2828
+ − 414 static Lisp_Object
+ − 415 tty_perhaps_init_unseen_key_defaults (struct console *UNUSED(con),
+ − 416 Lisp_Object key)
+ − 417 {
+ − 418 Ichar val;
+ − 419 extern Lisp_Object Vcurrent_global_map;
+ − 420
+ − 421 if (SYMBOLP(key))
+ − 422 {
+ − 423 /* We've no idea what to default an unknown symbol to on the TTY. */
+ − 424 return Qnil;
+ − 425 }
+ − 426
+ − 427 CHECK_CHAR(key);
+ − 428
2850
+ − 429 if (!(HASH_TABLEP(Vtty_seen_characters)))
2828
+ − 430 {
+ − 431 /* All the keysyms we deal with are character objects; therefore, we
+ − 432 can use eq as the test without worrying. */
2850
+ − 433 Vtty_seen_characters = make_lisp_hash_table (128, HASH_TABLE_NON_WEAK,
2828
+ − 434 HASH_TABLE_EQ);
+ − 435 }
+ − 436
+ − 437 /* Might give the user an opaque error if make_lisp_hash_table fails,
+ − 438 but it won't crash. */
2850
+ − 439 CHECK_HASH_TABLE(Vtty_seen_characters);
2828
+ − 440
+ − 441 val = XCHAR(key);
+ − 442
+ − 443 /* Same logic as in x_has_keysym; I'm not convinced it's always sane. */
+ − 444 if (val < 0x80)
+ − 445 {
+ − 446 return Qnil;
+ − 447 }
+ − 448
2850
+ − 449 if (!NILP(Fgethash(key, Vtty_seen_characters, Qnil)))
2828
+ − 450 {
+ − 451 return Qnil;
+ − 452 }
+ − 453
+ − 454 if (NILP (Flookup_key (Vcurrent_global_map, key, Qnil)))
+ − 455 {
2850
+ − 456 Fputhash(key, Qt, Vtty_seen_characters);
2828
+ − 457 Fdefine_key (Vcurrent_global_map, key, Qself_insert_command);
+ − 458 return Qt;
+ − 459 }
+ − 460
+ − 461 return Qnil;
+ − 462 }
+ − 463
428
+ − 464
+ − 465 /************************************************************************/
+ − 466 /* initialization */
+ − 467 /************************************************************************/
+ − 468
+ − 469 void
+ − 470 syms_of_console_tty (void)
+ − 471 {
+ − 472 DEFSUBR (Fconsole_tty_terminal_type);
+ − 473 DEFSUBR (Fconsole_tty_controlling_process);
563
+ − 474 DEFSYMBOL (Qterminal_type);
+ − 475 DEFSYMBOL (Qcontrolling_process);
428
+ − 476 DEFSUBR (Fconsole_tty_output_coding_system);
+ − 477 DEFSUBR (Fset_console_tty_output_coding_system);
+ − 478 DEFSUBR (Fconsole_tty_input_coding_system);
+ − 479 DEFSUBR (Fset_console_tty_input_coding_system);
+ − 480 DEFSUBR (Fset_console_tty_coding_system);
3571
+ − 481 DEFSUBR (Fconsole_tty_multiple_width);
+ − 482 DEFSUBR (Fset_console_tty_multiple_width);
428
+ − 483 }
+ − 484
+ − 485 void
+ − 486 console_type_create_tty (void)
+ − 487 {
+ − 488 INITIALIZE_CONSOLE_TYPE (tty, "tty", "console-tty-p");
+ − 489
+ − 490 /* console methods */
+ − 491 CONSOLE_HAS_METHOD (tty, init_console);
+ − 492 CONSOLE_HAS_METHOD (tty, mark_console);
+ − 493 CONSOLE_HAS_METHOD (tty, initially_selected_for_input);
+ − 494 CONSOLE_HAS_METHOD (tty, delete_console);
+ − 495 CONSOLE_HAS_METHOD (tty, canonicalize_console_connection);
+ − 496 CONSOLE_HAS_METHOD (tty, canonicalize_device_connection);
+ − 497 CONSOLE_HAS_METHOD (tty, semi_canonicalize_console_connection);
+ − 498 CONSOLE_HAS_METHOD (tty, semi_canonicalize_device_connection);
2828
+ − 499 CONSOLE_HAS_METHOD (tty, perhaps_init_unseen_key_defaults);
428
+ − 500 }
+ − 501
+ − 502 void
+ − 503 reinit_console_type_create_tty (void)
+ − 504 {
+ − 505 REINITIALIZE_CONSOLE_TYPE (tty);
+ − 506 }
+ − 507
+ − 508 void
+ − 509 image_instantiator_format_create_glyphs_tty (void)
+ − 510 {
+ − 511 IIFORMAT_VALID_CONSOLE (tty, nothing);
+ − 512 IIFORMAT_VALID_CONSOLE (tty, string);
+ − 513 IIFORMAT_VALID_CONSOLE (tty, formatted_string);
+ − 514 IIFORMAT_VALID_CONSOLE (tty, inherit);
+ − 515 }
+ − 516
+ − 517 void
+ − 518 vars_of_console_tty (void)
+ − 519 {
2850
+ − 520 DEFVAR_LISP ("tty-seen-characters", &Vtty_seen_characters /*
+ − 521 Hash table of non-ASCII characters the TTY subsystem has seen.
+ − 522 */ );
+ − 523 Vtty_seen_characters = Qnil;
428
+ − 524 Fprovide (Qtty);
+ − 525 }
