1 /* $NetBSD: tty.c,v 1.29 2002/06/26 18:23:31 itojun Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)tty.c 8.6 (Berkeley) 1/10/95"; 40 #else 41 __RCSID("$NetBSD: tty.c,v 1.29 2002/06/26 18:23:31 itojun Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 47 #include <stdlib.h> 48 #include <termios.h> 49 #include <unistd.h> 50 #include <sys/fcntl.h> 51 #include <sys/ioctl.h> 52 53 #include "curses.h" 54 #include "curses_private.h" 55 56 /* 57 * In general, curses should leave tty hardware settings alone (speed, parity, 58 * word size). This is most easily done in BSD by using TCSASOFT on all 59 * tcsetattr calls. On other systems, it would be better to get and restore 60 * those attributes at each change, or at least when stopped and restarted. 61 * See also the comments in getterm(). 62 */ 63 #ifdef TCSASOFT 64 int __tcaction = 1; /* Ignore hardware settings. */ 65 #else 66 int __tcaction = 0; 67 #endif 68 69 #ifndef OXTABS 70 #ifdef XTABS /* SMI uses XTABS. */ 71 #define OXTABS XTABS 72 #else 73 #define OXTABS 0 74 #endif 75 #endif 76 77 /* 78 * baudrate -- 79 * Return the current baudrate 80 */ 81 int 82 baudrate(void) 83 { 84 if (_cursesi_screen->notty == TRUE) 85 return 0; 86 87 return cfgetospeed(&_cursesi_screen->baset); 88 } 89 90 /* 91 * gettmode -- 92 * Do terminal type initialization. 93 */ 94 int 95 gettmode(void) 96 { 97 if (_cursesi_gettmode(_cursesi_screen) == ERR) 98 return ERR; 99 100 __GT = _cursesi_screen->GT; 101 __NONL = _cursesi_screen->NONL; 102 return OK; 103 } 104 105 /* 106 * _cursesi_gettmode -- 107 * Do the terminal type initialisation for the tty attached to the 108 * given screen. 109 */ 110 int 111 _cursesi_gettmode(SCREEN *screen) 112 { 113 screen->useraw = 0; 114 115 if (tcgetattr(fileno(screen->infd), &screen->orig_termios)) { 116 /* if the input fd is not a tty try the output */ 117 if (tcgetattr(fileno(screen->infd), &screen->orig_termios)) { 118 /* not a tty ... we will disable tty related stuff */ 119 screen->notty = TRUE; 120 __GT = 0; 121 __NONL = 0; 122 return (OK); 123 } 124 } 125 126 screen->baset = screen->orig_termios; 127 screen->baset.c_oflag &= ~OXTABS; 128 129 screen->GT = 0; /* historical. was used before we wired OXTABS off */ 130 screen->NONL = (screen->baset.c_oflag & ONLCR) == 0; 131 132 /* 133 * XXX 134 * System V and SMI systems overload VMIN and VTIME, such that 135 * VMIN is the same as the VEOF element, and VTIME is the same 136 * as the VEOL element. This means that, if VEOF was ^D, the 137 * default VMIN is 4. Majorly stupid. 138 */ 139 screen->cbreakt = screen->baset; 140 screen->cbreakt.c_lflag &= ~(ECHO | ECHONL | ICANON); 141 screen->cbreakt.c_cc[VMIN] = 1; 142 screen->cbreakt.c_cc[VTIME] = 0; 143 144 screen->rawt = screen->cbreakt; 145 screen->rawt.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | INLCR | IGNCR | 146 ICRNL | IXON); 147 screen->rawt.c_oflag &= ~OPOST; 148 screen->rawt.c_lflag &= ~(ISIG | IEXTEN); 149 150 /* 151 * In general, curses should leave hardware-related settings alone. 152 * This includes parity and word size. Older versions set the tty 153 * to 8 bits, no parity in raw(), but this is considered to be an 154 * artifact of the old tty interface. If it's desired to change 155 * parity and word size, the TCSASOFT bit has to be removed from the 156 * calls that switch to/from "raw" mode. 157 */ 158 if (!__tcaction) { 159 screen->rawt.c_iflag &= ~ISTRIP; 160 screen->rawt.c_cflag &= ~(CSIZE | PARENB); 161 screen->rawt.c_cflag |= CS8; 162 } 163 164 screen->curt = &screen->baset; 165 return (tcsetattr(fileno(screen->infd), __tcaction ? 166 TCSASOFT | TCSADRAIN : TCSADRAIN, screen->curt) ? ERR : OK); 167 } 168 169 int 170 raw(void) 171 { 172 /* Check if we need to restart ... */ 173 if (_cursesi_screen->endwin) 174 __restartwin(); 175 176 _cursesi_screen->useraw = __pfast = __rawmode = 1; 177 _cursesi_screen->curt = &_cursesi_screen->rawt; 178 if (_cursesi_screen->notty == TRUE) 179 return OK; 180 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 181 TCSASOFT | TCSADRAIN : TCSADRAIN, 182 _cursesi_screen->curt) ? ERR : OK); 183 } 184 185 int 186 noraw(void) 187 { 188 /* Check if we need to restart ... */ 189 if (_cursesi_screen->endwin) 190 __restartwin(); 191 192 _cursesi_screen->useraw = __pfast = __rawmode = 0; 193 if (_cursesi_screen->notty == TRUE) 194 return OK; 195 _cursesi_screen->curt = &_cursesi_screen->baset; 196 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 197 TCSASOFT | TCSADRAIN : TCSADRAIN, 198 _cursesi_screen->curt) ? ERR : OK); 199 } 200 201 int 202 cbreak(void) 203 { 204 /* Check if we need to restart ... */ 205 if (_cursesi_screen->endwin) 206 __restartwin(); 207 208 __rawmode = 1; 209 if (_cursesi_screen->notty == TRUE) 210 return OK; 211 _cursesi_screen->curt = _cursesi_screen->useraw ? 212 &_cursesi_screen->rawt : &_cursesi_screen->cbreakt; 213 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 214 TCSASOFT | TCSADRAIN : TCSADRAIN, 215 _cursesi_screen->curt) ? ERR : OK); 216 } 217 218 int 219 nocbreak(void) 220 { 221 /* Check if we need to restart ... */ 222 if (_cursesi_screen->endwin) 223 __restartwin(); 224 225 __rawmode = 0; 226 if (_cursesi_screen->notty == TRUE) 227 return OK; 228 _cursesi_screen->curt = _cursesi_screen->useraw ? 229 &_cursesi_screen->rawt : &_cursesi_screen->baset; 230 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 231 TCSASOFT | TCSADRAIN : TCSADRAIN, 232 _cursesi_screen->curt) ? ERR : OK); 233 } 234 235 int 236 __delay(void) 237 { 238 /* Check if we need to restart ... */ 239 if (_cursesi_screen->endwin) 240 __restartwin(); 241 242 if (_cursesi_screen->notty == TRUE) 243 return OK; 244 _cursesi_screen->rawt.c_cc[VMIN] = 1; 245 _cursesi_screen->rawt.c_cc[VTIME] = 0; 246 _cursesi_screen->cbreakt.c_cc[VMIN] = 1; 247 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 248 _cursesi_screen->baset.c_cc[VMIN] = 1; 249 _cursesi_screen->baset.c_cc[VTIME] = 0; 250 251 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 252 TCSASOFT : TCSANOW, _cursesi_screen->curt) ? ERR : OK); 253 } 254 255 int 256 __nodelay(void) 257 { 258 /* Check if we need to restart ... */ 259 if (_cursesi_screen->endwin) 260 __restartwin(); 261 262 if (_cursesi_screen->notty == TRUE) 263 return OK; 264 _cursesi_screen->rawt.c_cc[VMIN] = 0; 265 _cursesi_screen->rawt.c_cc[VTIME] = 0; 266 _cursesi_screen->cbreakt.c_cc[VMIN] = 0; 267 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 268 _cursesi_screen->baset.c_cc[VMIN] = 0; 269 _cursesi_screen->baset.c_cc[VTIME] = 0; 270 271 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 272 TCSASOFT : TCSANOW, _cursesi_screen->curt) ? ERR : OK); 273 } 274 275 void 276 __save_termios(void) 277 { 278 /* Check if we need to restart ... */ 279 if (_cursesi_screen->endwin) 280 __restartwin(); 281 282 if (_cursesi_screen->notty == TRUE) 283 return; 284 _cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN]; 285 _cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME]; 286 } 287 288 void 289 __restore_termios(void) 290 { 291 /* Check if we need to restart ... */ 292 if (_cursesi_screen->endwin) 293 __restartwin(); 294 295 if (_cursesi_screen->notty == TRUE) 296 return; 297 _cursesi_screen->rawt.c_cc[VMIN] = _cursesi_screen->ovmin; 298 _cursesi_screen->rawt.c_cc[VTIME] = _cursesi_screen->ovtime; 299 _cursesi_screen->cbreakt.c_cc[VMIN] = _cursesi_screen->ovmin; 300 _cursesi_screen->cbreakt.c_cc[VTIME] = _cursesi_screen->ovtime; 301 _cursesi_screen->baset.c_cc[VMIN] = _cursesi_screen->ovmin; 302 _cursesi_screen->baset.c_cc[VTIME] = _cursesi_screen->ovtime; 303 } 304 305 int 306 __timeout(int delay) 307 { 308 /* Check if we need to restart ... */ 309 if (_cursesi_screen->endwin) 310 __restartwin(); 311 312 if (_cursesi_screen->notty == TRUE) 313 return OK; 314 _cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN]; 315 _cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME]; 316 _cursesi_screen->rawt.c_cc[VMIN] = 0; 317 _cursesi_screen->rawt.c_cc[VTIME] = delay; 318 _cursesi_screen->cbreakt.c_cc[VMIN] = 0; 319 _cursesi_screen->cbreakt.c_cc[VTIME] = delay; 320 _cursesi_screen->baset.c_cc[VMIN] = 0; 321 _cursesi_screen->baset.c_cc[VTIME] = delay; 322 323 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 324 TCSASOFT | TCSANOW : TCSANOW, 325 _cursesi_screen->curt) ? ERR : OK); 326 } 327 328 int 329 __notimeout(void) 330 { 331 /* Check if we need to restart ... */ 332 if (_cursesi_screen->endwin) 333 __restartwin(); 334 335 if (_cursesi_screen->notty == TRUE) 336 return OK; 337 _cursesi_screen->rawt.c_cc[VMIN] = 1; 338 _cursesi_screen->rawt.c_cc[VTIME] = 0; 339 _cursesi_screen->cbreakt.c_cc[VMIN] = 1; 340 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 341 _cursesi_screen->baset.c_cc[VMIN] = 1; 342 _cursesi_screen->baset.c_cc[VTIME] = 0; 343 344 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 345 TCSASOFT | TCSANOW : TCSANOW, 346 _cursesi_screen->curt) ? ERR : OK); 347 } 348 349 int 350 echo(void) 351 { 352 /* Check if we need to restart ... */ 353 if (_cursesi_screen->endwin) 354 __restartwin(); 355 356 __echoit = 1; 357 return (OK); 358 } 359 360 int 361 noecho(void) 362 { 363 /* Check if we need to restart ... */ 364 if (_cursesi_screen->endwin) 365 __restartwin(); 366 367 __echoit = 0; 368 return (OK); 369 } 370 371 int 372 nl(void) 373 { 374 /* Check if we need to restart ... */ 375 if (_cursesi_screen->endwin) 376 __restartwin(); 377 378 if (_cursesi_screen->notty == TRUE) 379 return OK; 380 _cursesi_screen->rawt.c_iflag |= ICRNL; 381 _cursesi_screen->rawt.c_oflag |= ONLCR; 382 _cursesi_screen->cbreakt.c_iflag |= ICRNL; 383 _cursesi_screen->cbreakt.c_oflag |= ONLCR; 384 _cursesi_screen->baset.c_iflag |= ICRNL; 385 _cursesi_screen->baset.c_oflag |= ONLCR; 386 387 _cursesi_screen->pfast = _cursesi_screen->rawmode; 388 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 389 TCSASOFT | TCSADRAIN : TCSADRAIN, 390 _cursesi_screen->curt) ? ERR : OK); 391 } 392 393 int 394 nonl(void) 395 { 396 /* Check if we need to restart ... */ 397 if (_cursesi_screen->endwin) 398 __restartwin(); 399 400 if (_cursesi_screen->notty == TRUE) 401 return OK; 402 _cursesi_screen->rawt.c_iflag &= ~ICRNL; 403 _cursesi_screen->rawt.c_oflag &= ~ONLCR; 404 _cursesi_screen->cbreakt.c_iflag &= ~ICRNL; 405 _cursesi_screen->cbreakt.c_oflag &= ~ONLCR; 406 _cursesi_screen->baset.c_iflag &= ~ICRNL; 407 _cursesi_screen->baset.c_oflag &= ~ONLCR; 408 409 __pfast = 1; 410 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 411 TCSASOFT | TCSADRAIN : TCSADRAIN, 412 _cursesi_screen->curt) ? ERR : OK); 413 } 414 415 int 416 intrflush(WINDOW *win, bool bf) /*ARGSUSED*/ 417 { 418 /* Check if we need to restart ... */ 419 if (_cursesi_screen->endwin) 420 __restartwin(); 421 422 if (_cursesi_screen->notty == TRUE) 423 return OK; 424 if (bf) { 425 _cursesi_screen->rawt.c_lflag &= ~NOFLSH; 426 _cursesi_screen->cbreakt.c_lflag &= ~NOFLSH; 427 _cursesi_screen->baset.c_lflag &= ~NOFLSH; 428 } else { 429 _cursesi_screen->rawt.c_lflag |= NOFLSH; 430 _cursesi_screen->cbreakt.c_lflag |= NOFLSH; 431 _cursesi_screen->baset.c_lflag |= NOFLSH; 432 } 433 434 __pfast = 1; 435 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 436 TCSASOFT | TCSADRAIN : TCSADRAIN, 437 _cursesi_screen->curt) ? ERR : OK); 438 } 439 440 void 441 __startwin(SCREEN *screen) 442 { 443 444 (void) fflush(screen->infd); 445 446 /* 447 * Some C libraries default to a 1K buffer when talking to a tty. 448 * With a larger screen, especially across a network, we'd like 449 * to get it to all flush in a single write. Make it twice as big 450 * as just the characters (so that we have room for cursor motions 451 * and attribute information) but no more than 8K. 452 */ 453 if (screen->stdbuf == NULL) { 454 screen->len = LINES * COLS * 2; 455 if (screen->len > 8192) 456 screen->len = 8192; 457 if ((screen->stdbuf = malloc(screen->len)) == NULL) 458 screen->len = 0; 459 } 460 (void) setvbuf(screen->outfd, screen->stdbuf, _IOFBF, screen->len); 461 462 t_puts(screen->cursesi_genbuf, __tc_ti, 0, __cputchar_args, 463 (void *) screen->outfd); 464 t_puts(screen->cursesi_genbuf, __tc_vs, 0, __cputchar_args, 465 (void *) screen->outfd); 466 if (screen->curscr->flags & __KEYPAD) 467 t_puts(screen->cursesi_genbuf, __tc_ks, 0, __cputchar_args, 468 (void *) screen->outfd); 469 screen->endwin = 0; 470 } 471 472 int 473 endwin(void) 474 { 475 return __stopwin(); 476 } 477 478 bool 479 isendwin(void) 480 { 481 return (_cursesi_screen->endwin ? TRUE : FALSE); 482 } 483 484 int 485 flushinp(void) 486 { 487 (void) fpurge(_cursesi_screen->infd); 488 return (OK); 489 } 490 491 /* 492 * The following routines, savetty and resetty are completely useless and 493 * are left in only as stubs. If people actually use them they will almost 494 * certainly screw up the state of the world. 495 */ 496 /*static struct termios savedtty;*/ 497 int 498 savetty(void) 499 { 500 if (_cursesi_screen->notty == TRUE) 501 return OK; 502 return (tcgetattr(fileno(_cursesi_screen->infd), 503 &_cursesi_screen->savedtty) ? ERR : OK); 504 } 505 506 int 507 resetty(void) 508 { 509 if (_cursesi_screen->notty == TRUE) 510 return OK; 511 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 512 TCSASOFT | TCSADRAIN : TCSADRAIN, 513 &_cursesi_screen->savedtty) ? ERR : OK); 514 } 515 516 /* 517 * erasechar -- 518 * Return the character of the erase key. 519 * 520 */ 521 char 522 erasechar(void) 523 { 524 if (_cursesi_screen->notty == TRUE) 525 return 0; 526 return _cursesi_screen->baset.c_cc[VERASE]; 527 } 528 529 /* 530 * killchar -- 531 * Return the character of the kill key. 532 */ 533 char 534 killchar(void) 535 { 536 if (_cursesi_screen->notty == TRUE) 537 return 0; 538 return _cursesi_screen->baset.c_cc[VKILL]; 539 } 540