tty.c revision 1.37.2.1
1 /* $NetBSD: tty.c,v 1.37.2.1 2006/08/28 15:06:24 tron 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)tty.c 8.6 (Berkeley) 1/10/95"; 36 #else 37 __RCSID("$NetBSD: tty.c,v 1.37.2.1 2006/08/28 15:06:24 tron Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/types.h> 42 43 #include <stdlib.h> 44 #include <termios.h> 45 #include <unistd.h> 46 #include <sys/fcntl.h> 47 #include <sys/ioctl.h> 48 49 #include "curses.h" 50 #include "curses_private.h" 51 52 /* 53 * In general, curses should leave tty hardware settings alone (speed, parity, 54 * word size). This is most easily done in BSD by using TCSASOFT on all 55 * tcsetattr calls. On other systems, it would be better to get and restore 56 * those attributes at each change, or at least when stopped and restarted. 57 * See also the comments in getterm(). 58 */ 59 #ifdef TCSASOFT 60 int __tcaction = 1; /* Ignore hardware settings. */ 61 #else 62 int __tcaction = 0; 63 #endif 64 65 #ifndef OXTABS 66 #ifdef XTABS /* SMI uses XTABS. */ 67 #define OXTABS XTABS 68 #else 69 #define OXTABS 0 70 #endif 71 #endif 72 73 /* 74 * baudrate -- 75 * Return the current baudrate 76 */ 77 int 78 baudrate(void) 79 { 80 if (_cursesi_screen->notty == TRUE) 81 return 0; 82 83 return cfgetospeed(&_cursesi_screen->baset); 84 } 85 86 /* 87 * gettmode -- 88 * Do terminal type initialization. 89 */ 90 int 91 gettmode(void) 92 { 93 if (_cursesi_gettmode(_cursesi_screen) == ERR) 94 return ERR; 95 96 __GT = _cursesi_screen->GT; 97 __NONL = _cursesi_screen->NONL; 98 return OK; 99 } 100 101 /* 102 * _cursesi_gettmode -- 103 * Do the terminal type initialisation for the tty attached to the 104 * given screen. 105 */ 106 int 107 _cursesi_gettmode(SCREEN *screen) 108 { 109 screen->useraw = 0; 110 111 if (tcgetattr(fileno(screen->infd), &screen->orig_termios)) { 112 /* if the input fd is not a tty try the output */ 113 if (tcgetattr(fileno(screen->infd), &screen->orig_termios)) { 114 /* not a tty ... we will disable tty related stuff */ 115 screen->notty = TRUE; 116 __GT = 0; 117 __NONL = 0; 118 return (OK); 119 } 120 } 121 122 screen->baset = screen->orig_termios; 123 screen->baset.c_oflag &= ~OXTABS; 124 125 screen->GT = 0; /* historical. was used before we wired OXTABS off */ 126 screen->NONL = (screen->baset.c_oflag & ONLCR) == 0; 127 128 /* 129 * XXX 130 * System V and SMI systems overload VMIN and VTIME, such that 131 * VMIN is the same as the VEOF element, and VTIME is the same 132 * as the VEOL element. This means that, if VEOF was ^D, the 133 * default VMIN is 4. Majorly stupid. 134 */ 135 screen->cbreakt = screen->baset; 136 screen->cbreakt.c_lflag &= ~(ECHO | ECHONL | ICANON); 137 screen->cbreakt.c_cc[VMIN] = 1; 138 screen->cbreakt.c_cc[VTIME] = 0; 139 140 screen->rawt = screen->cbreakt; 141 screen->rawt.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | INLCR | IGNCR | 142 ICRNL | IXON); 143 screen->rawt.c_oflag &= ~OPOST; 144 screen->rawt.c_lflag &= ~(ISIG | IEXTEN); 145 146 /* 147 * In general, curses should leave hardware-related settings alone. 148 * This includes parity and word size. Older versions set the tty 149 * to 8 bits, no parity in raw(), but this is considered to be an 150 * artifact of the old tty interface. If it's desired to change 151 * parity and word size, the TCSASOFT bit has to be removed from the 152 * calls that switch to/from "raw" mode. 153 */ 154 if (!__tcaction) { 155 screen->rawt.c_iflag &= ~ISTRIP; 156 screen->rawt.c_cflag &= ~(CSIZE | PARENB); 157 screen->rawt.c_cflag |= CS8; 158 } 159 160 screen->curt = &screen->baset; 161 return (tcsetattr(fileno(screen->infd), __tcaction ? 162 TCSASOFT | TCSADRAIN : TCSADRAIN, screen->curt) ? ERR : OK); 163 } 164 165 /* 166 * raw -- 167 * Put the terminal into raw mode 168 */ 169 int 170 raw(void) 171 { 172 #ifdef DEBUG 173 __CTRACE("raw()\n"); 174 #endif 175 /* Check if we need to restart ... */ 176 if (_cursesi_screen->endwin) 177 __restartwin(); 178 179 _cursesi_screen->useraw = __pfast = __rawmode = 1; 180 _cursesi_screen->curt = &_cursesi_screen->rawt; 181 if (_cursesi_screen->notty == TRUE) 182 return OK; 183 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 184 TCSASOFT | TCSADRAIN : TCSADRAIN, 185 _cursesi_screen->curt) ? ERR : OK); 186 } 187 188 /* 189 * noraw -- 190 * Put the terminal into cooked mode 191 */ 192 int 193 noraw(void) 194 { 195 #ifdef DEBUG 196 __CTRACE("noraw()\n"); 197 #endif 198 /* Check if we need to restart ... */ 199 if (_cursesi_screen->endwin) 200 __restartwin(); 201 202 _cursesi_screen->useraw = __pfast = __rawmode = 0; 203 if (_cursesi_screen->notty == TRUE) 204 return OK; 205 _cursesi_screen->curt = &_cursesi_screen->baset; 206 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 207 TCSASOFT | TCSADRAIN : TCSADRAIN, 208 _cursesi_screen->curt) ? ERR : OK); 209 } 210 211 /* 212 * cbreak -- 213 * Enable cbreak mode 214 */ 215 int 216 cbreak(void) 217 { 218 #ifdef DEBUG 219 __CTRACE("cbreak()\n"); 220 #endif 221 /* Check if we need to restart ... */ 222 if (_cursesi_screen->endwin) 223 __restartwin(); 224 225 __rawmode = 1; 226 if (_cursesi_screen->notty == TRUE) 227 return OK; 228 _cursesi_screen->curt = _cursesi_screen->useraw ? 229 &_cursesi_screen->rawt : &_cursesi_screen->cbreakt; 230 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 231 TCSASOFT | TCSADRAIN : TCSADRAIN, 232 _cursesi_screen->curt) ? ERR : OK); 233 } 234 235 /* 236 * nocbreak -- 237 * Disable cbreak mode 238 */ 239 int 240 nocbreak(void) 241 { 242 #ifdef DEBUG 243 __CTRACE("nocbreak()\n"); 244 #endif 245 /* Check if we need to restart ... */ 246 if (_cursesi_screen->endwin) 247 __restartwin(); 248 249 __rawmode = 0; 250 if (_cursesi_screen->notty == TRUE) 251 return OK; 252 /* if we were in halfdelay mode then nuke the timeout */ 253 if ((_cursesi_screen->half_delay == TRUE) && 254 (__notimeout() == ERR)) 255 return ERR; 256 257 _cursesi_screen->half_delay = FALSE; 258 _cursesi_screen->curt = _cursesi_screen->useraw ? 259 &_cursesi_screen->rawt : &_cursesi_screen->baset; 260 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 261 TCSASOFT | TCSADRAIN : TCSADRAIN, 262 _cursesi_screen->curt) ? ERR : OK); 263 } 264 265 /* 266 * halfdelay -- 267 * Put the terminal into cbreak mode with the specified timeout. 268 * 269 */ 270 int 271 halfdelay(int duration) 272 { 273 if ((duration < 1) || (duration > 255)) 274 return ERR; 275 276 if (cbreak() == ERR) 277 return ERR; 278 279 if (__timeout(duration) == ERR) 280 return ERR; 281 282 _cursesi_screen->half_delay = TRUE; 283 return OK; 284 } 285 286 int 287 __delay(void) 288 { 289 #ifdef DEBUG 290 __CTRACE("__delay()\n"); 291 #endif 292 /* Check if we need to restart ... */ 293 if (_cursesi_screen->endwin) 294 __restartwin(); 295 296 if (_cursesi_screen->notty == TRUE) 297 return OK; 298 _cursesi_screen->rawt.c_cc[VMIN] = 1; 299 _cursesi_screen->rawt.c_cc[VTIME] = 0; 300 _cursesi_screen->cbreakt.c_cc[VMIN] = 1; 301 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 302 _cursesi_screen->baset.c_cc[VMIN] = 1; 303 _cursesi_screen->baset.c_cc[VTIME] = 0; 304 305 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 306 TCSASOFT : TCSANOW, _cursesi_screen->curt) ? ERR : OK); 307 } 308 309 int 310 __nodelay(void) 311 { 312 #ifdef DEBUG 313 __CTRACE("__nodelay()\n"); 314 #endif 315 /* Check if we need to restart ... */ 316 if (_cursesi_screen->endwin) 317 __restartwin(); 318 319 if (_cursesi_screen->notty == TRUE) 320 return OK; 321 _cursesi_screen->rawt.c_cc[VMIN] = 0; 322 _cursesi_screen->rawt.c_cc[VTIME] = 0; 323 _cursesi_screen->cbreakt.c_cc[VMIN] = 0; 324 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 325 _cursesi_screen->baset.c_cc[VMIN] = 0; 326 _cursesi_screen->baset.c_cc[VTIME] = 0; 327 328 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 329 TCSASOFT : TCSANOW, _cursesi_screen->curt) ? ERR : OK); 330 } 331 332 void 333 __save_termios(void) 334 { 335 /* Check if we need to restart ... */ 336 if (_cursesi_screen->endwin) 337 __restartwin(); 338 339 if (_cursesi_screen->notty == TRUE) 340 return; 341 _cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN]; 342 _cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME]; 343 } 344 345 void 346 __restore_termios(void) 347 { 348 /* Check if we need to restart ... */ 349 if (_cursesi_screen->endwin) 350 __restartwin(); 351 352 if (_cursesi_screen->notty == TRUE) 353 return; 354 _cursesi_screen->rawt.c_cc[VMIN] = _cursesi_screen->ovmin; 355 _cursesi_screen->rawt.c_cc[VTIME] = _cursesi_screen->ovtime; 356 _cursesi_screen->cbreakt.c_cc[VMIN] = _cursesi_screen->ovmin; 357 _cursesi_screen->cbreakt.c_cc[VTIME] = _cursesi_screen->ovtime; 358 _cursesi_screen->baset.c_cc[VMIN] = _cursesi_screen->ovmin; 359 _cursesi_screen->baset.c_cc[VTIME] = _cursesi_screen->ovtime; 360 } 361 362 int 363 __timeout(int delay) 364 { 365 #ifdef DEBUG 366 __CTRACE("__timeout()\n"); 367 #endif 368 /* Check if we need to restart ... */ 369 if (_cursesi_screen->endwin) 370 __restartwin(); 371 372 if (_cursesi_screen->notty == TRUE) 373 return OK; 374 _cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN]; 375 _cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME]; 376 _cursesi_screen->rawt.c_cc[VMIN] = 0; 377 _cursesi_screen->rawt.c_cc[VTIME] = delay; 378 _cursesi_screen->cbreakt.c_cc[VMIN] = 0; 379 _cursesi_screen->cbreakt.c_cc[VTIME] = delay; 380 _cursesi_screen->baset.c_cc[VMIN] = 0; 381 _cursesi_screen->baset.c_cc[VTIME] = delay; 382 383 return (tcsetattr(fileno(_cursesi_screen->infd), 384 __tcaction ? TCSASOFT | TCSANOW : TCSANOW, 385 _cursesi_screen->curt) ? ERR : OK); 386 } 387 388 int 389 __notimeout(void) 390 { 391 #ifdef DEBUG 392 __CTRACE("__notimeout()\n"); 393 #endif 394 /* Check if we need to restart ... */ 395 if (_cursesi_screen->endwin) 396 __restartwin(); 397 398 if (_cursesi_screen->notty == TRUE) 399 return OK; 400 _cursesi_screen->rawt.c_cc[VMIN] = 1; 401 _cursesi_screen->rawt.c_cc[VTIME] = 0; 402 _cursesi_screen->cbreakt.c_cc[VMIN] = 1; 403 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 404 _cursesi_screen->baset.c_cc[VMIN] = 1; 405 _cursesi_screen->baset.c_cc[VTIME] = 0; 406 407 return (tcsetattr(fileno(_cursesi_screen->infd), 408 __tcaction ? TCSASOFT | TCSANOW : TCSANOW, 409 _cursesi_screen->curt) ? ERR : OK); 410 } 411 412 int 413 echo(void) 414 { 415 #ifdef DEBUG 416 __CTRACE("echo()\n"); 417 #endif 418 /* Check if we need to restart ... */ 419 if (_cursesi_screen->endwin) 420 __restartwin(); 421 422 __echoit = 1; 423 return (OK); 424 } 425 426 int 427 noecho(void) 428 { 429 #ifdef DEBUG 430 __CTRACE("noecho()\n"); 431 #endif 432 /* Check if we need to restart ... */ 433 if (_cursesi_screen->endwin) 434 __restartwin(); 435 436 __echoit = 0; 437 return (OK); 438 } 439 440 int 441 nl(void) 442 { 443 #ifdef DEBUG 444 __CTRACE("nl()\n"); 445 #endif 446 /* Check if we need to restart ... */ 447 if (_cursesi_screen->endwin) 448 __restartwin(); 449 450 if (_cursesi_screen->notty == TRUE) 451 return OK; 452 _cursesi_screen->rawt.c_iflag |= ICRNL; 453 _cursesi_screen->rawt.c_oflag |= ONLCR; 454 _cursesi_screen->cbreakt.c_iflag |= ICRNL; 455 _cursesi_screen->cbreakt.c_oflag |= ONLCR; 456 _cursesi_screen->baset.c_iflag |= ICRNL; 457 _cursesi_screen->baset.c_oflag |= ONLCR; 458 459 _cursesi_screen->nl = 1; 460 _cursesi_screen->pfast = _cursesi_screen->rawmode; 461 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 462 TCSASOFT | TCSADRAIN : TCSADRAIN, 463 _cursesi_screen->curt) ? ERR : OK); 464 } 465 466 int 467 nonl(void) 468 { 469 #ifdef DEBUG 470 __CTRACE("nonl()\n"); 471 #endif 472 /* Check if we need to restart ... */ 473 if (_cursesi_screen->endwin) 474 __restartwin(); 475 476 if (_cursesi_screen->notty == TRUE) 477 return OK; 478 _cursesi_screen->rawt.c_iflag &= ~ICRNL; 479 _cursesi_screen->rawt.c_oflag &= ~ONLCR; 480 _cursesi_screen->cbreakt.c_iflag &= ~ICRNL; 481 _cursesi_screen->cbreakt.c_oflag &= ~ONLCR; 482 _cursesi_screen->baset.c_iflag &= ~ICRNL; 483 _cursesi_screen->baset.c_oflag &= ~ONLCR; 484 485 _cursesi_screen->nl = 0; 486 __pfast = 1; 487 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 488 TCSASOFT | TCSADRAIN : TCSADRAIN, 489 _cursesi_screen->curt) ? ERR : OK); 490 } 491 492 #ifndef _CURSES_USE_MACROS 493 void 494 noqiflush(void) 495 { 496 (void) intrflush(stdscr, FALSE); 497 } 498 499 void 500 qiflush(void) 501 { 502 (void) intrflush(stdscr, TRUE); 503 } 504 #endif /* _CURSES_USE_MACROS */ 505 506 int 507 intrflush(WINDOW *win, bool bf) /*ARGSUSED*/ 508 { 509 /* Check if we need to restart ... */ 510 if (_cursesi_screen->endwin) 511 __restartwin(); 512 513 if (_cursesi_screen->notty == TRUE) 514 return OK; 515 if (bf) { 516 _cursesi_screen->rawt.c_lflag &= ~NOFLSH; 517 _cursesi_screen->cbreakt.c_lflag &= ~NOFLSH; 518 _cursesi_screen->baset.c_lflag &= ~NOFLSH; 519 } else { 520 _cursesi_screen->rawt.c_lflag |= NOFLSH; 521 _cursesi_screen->cbreakt.c_lflag |= NOFLSH; 522 _cursesi_screen->baset.c_lflag |= NOFLSH; 523 } 524 525 __pfast = 1; 526 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 527 TCSASOFT | TCSADRAIN : TCSADRAIN, 528 _cursesi_screen->curt) ? ERR : OK); 529 } 530 531 void 532 __startwin(SCREEN *screen) 533 { 534 535 (void) fflush(screen->infd); 536 537 /* 538 * Some C libraries default to a 1K buffer when talking to a tty. 539 * With a larger screen, especially across a network, we'd like 540 * to get it to all flush in a single write. Make it twice as big 541 * as just the characters (so that we have room for cursor motions 542 * and attribute information) but no more than 8K. 543 */ 544 if (screen->stdbuf == NULL) { 545 screen->len = LINES * COLS * 2; 546 if (screen->len > 8192) 547 screen->len = 8192; 548 if ((screen->stdbuf = malloc(screen->len)) == NULL) 549 screen->len = 0; 550 } 551 (void) setvbuf(screen->outfd, screen->stdbuf, _IOFBF, screen->len); 552 553 t_puts(screen->cursesi_genbuf, __tc_ti, 0, __cputchar_args, 554 (void *) screen->outfd); 555 t_puts(screen->cursesi_genbuf, __tc_vs, 0, __cputchar_args, 556 (void *) screen->outfd); 557 if (screen->curscr->flags & __KEYPAD) 558 t_puts(screen->cursesi_genbuf, __tc_ks, 0, __cputchar_args, 559 (void *) screen->outfd); 560 screen->endwin = 0; 561 } 562 563 int 564 endwin(void) 565 { 566 #ifdef DEBUG 567 __CTRACE("endwin\n"); 568 #endif 569 return __stopwin(); 570 } 571 572 bool 573 isendwin(void) 574 { 575 return (_cursesi_screen->endwin ? TRUE : FALSE); 576 } 577 578 int 579 flushinp(void) 580 { 581 (void) fpurge(_cursesi_screen->infd); 582 return (OK); 583 } 584 585 /* 586 * The following routines, savetty and resetty are completely useless and 587 * are left in only as stubs. If people actually use them they will almost 588 * certainly screw up the state of the world. 589 */ 590 /*static struct termios savedtty;*/ 591 int 592 savetty(void) 593 { 594 if (_cursesi_screen->notty == TRUE) 595 return OK; 596 return (tcgetattr(fileno(_cursesi_screen->infd), 597 &_cursesi_screen->savedtty) ? ERR : OK); 598 } 599 600 int 601 resetty(void) 602 { 603 if (_cursesi_screen->notty == TRUE) 604 return OK; 605 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 606 TCSASOFT | TCSADRAIN : TCSADRAIN, 607 &_cursesi_screen->savedtty) ? ERR : OK); 608 } 609 610 /* 611 * erasechar -- 612 * Return the character of the erase key. 613 */ 614 char 615 erasechar(void) 616 { 617 if (_cursesi_screen->notty == TRUE) 618 return 0; 619 return _cursesi_screen->baset.c_cc[VERASE]; 620 } 621 622 /* 623 * killchar -- 624 * Return the character of the kill key. 625 */ 626 char 627 killchar(void) 628 { 629 if (_cursesi_screen->notty == TRUE) 630 return 0; 631 return _cursesi_screen->baset.c_cc[VKILL]; 632 } 633
Indexes created Fri Sep 26 20:09:58 GMT 2025