tty.c revision 1.36
1 /* $NetBSD: tty.c,v 1.36 2004/01/20 08:30:55 wiz 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 1.36 2004/01/20 08:30:55 wiz 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 /* Check if we need to restart ... */ 290 if (_cursesi_screen->endwin) 291 __restartwin(); 292 293 if (_cursesi_screen->notty == TRUE) 294 return OK; 295 _cursesi_screen->rawt.c_cc[VMIN] = 1; 296 _cursesi_screen->rawt.c_cc[VTIME] = 0; 297 _cursesi_screen->cbreakt.c_cc[VMIN] = 1; 298 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 299 _cursesi_screen->baset.c_cc[VMIN] = 1; 300 _cursesi_screen->baset.c_cc[VTIME] = 0; 301 302 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 303 TCSASOFT : TCSANOW, _cursesi_screen->curt) ? ERR : OK); 304 } 305 306 int 307 __nodelay(void) 308 { 309 /* Check if we need to restart ... */ 310 if (_cursesi_screen->endwin) 311 __restartwin(); 312 313 if (_cursesi_screen->notty == TRUE) 314 return OK; 315 _cursesi_screen->rawt.c_cc[VMIN] = 0; 316 _cursesi_screen->rawt.c_cc[VTIME] = 0; 317 _cursesi_screen->cbreakt.c_cc[VMIN] = 0; 318 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 319 _cursesi_screen->baset.c_cc[VMIN] = 0; 320 _cursesi_screen->baset.c_cc[VTIME] = 0; 321 322 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 323 TCSASOFT : TCSANOW, _cursesi_screen->curt) ? ERR : OK); 324 } 325 326 void 327 __save_termios(void) 328 { 329 /* Check if we need to restart ... */ 330 if (_cursesi_screen->endwin) 331 __restartwin(); 332 333 if (_cursesi_screen->notty == TRUE) 334 return; 335 _cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN]; 336 _cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME]; 337 } 338 339 void 340 __restore_termios(void) 341 { 342 /* Check if we need to restart ... */ 343 if (_cursesi_screen->endwin) 344 __restartwin(); 345 346 if (_cursesi_screen->notty == TRUE) 347 return; 348 _cursesi_screen->rawt.c_cc[VMIN] = _cursesi_screen->ovmin; 349 _cursesi_screen->rawt.c_cc[VTIME] = _cursesi_screen->ovtime; 350 _cursesi_screen->cbreakt.c_cc[VMIN] = _cursesi_screen->ovmin; 351 _cursesi_screen->cbreakt.c_cc[VTIME] = _cursesi_screen->ovtime; 352 _cursesi_screen->baset.c_cc[VMIN] = _cursesi_screen->ovmin; 353 _cursesi_screen->baset.c_cc[VTIME] = _cursesi_screen->ovtime; 354 } 355 356 int 357 __timeout(int delay) 358 { 359 /* Check if we need to restart ... */ 360 if (_cursesi_screen->endwin) 361 __restartwin(); 362 363 if (_cursesi_screen->notty == TRUE) 364 return OK; 365 _cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN]; 366 _cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME]; 367 _cursesi_screen->rawt.c_cc[VMIN] = 0; 368 _cursesi_screen->rawt.c_cc[VTIME] = delay; 369 _cursesi_screen->cbreakt.c_cc[VMIN] = 0; 370 _cursesi_screen->cbreakt.c_cc[VTIME] = delay; 371 _cursesi_screen->baset.c_cc[VMIN] = 0; 372 _cursesi_screen->baset.c_cc[VTIME] = delay; 373 374 return (tcsetattr(fileno(_cursesi_screen->infd), 375 __tcaction ? TCSASOFT | TCSANOW : TCSANOW, 376 _cursesi_screen->curt) ? ERR : OK); 377 } 378 379 int 380 __notimeout(void) 381 { 382 /* Check if we need to restart ... */ 383 if (_cursesi_screen->endwin) 384 __restartwin(); 385 386 if (_cursesi_screen->notty == TRUE) 387 return OK; 388 _cursesi_screen->rawt.c_cc[VMIN] = 1; 389 _cursesi_screen->rawt.c_cc[VTIME] = 0; 390 _cursesi_screen->cbreakt.c_cc[VMIN] = 1; 391 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 392 _cursesi_screen->baset.c_cc[VMIN] = 1; 393 _cursesi_screen->baset.c_cc[VTIME] = 0; 394 395 return (tcsetattr(fileno(_cursesi_screen->infd), 396 __tcaction ? TCSASOFT | TCSANOW : TCSANOW, 397 _cursesi_screen->curt) ? ERR : OK); 398 } 399 400 int 401 echo(void) 402 { 403 #ifdef DEBUG 404 __CTRACE("echo()\n"); 405 #endif 406 /* Check if we need to restart ... */ 407 if (_cursesi_screen->endwin) 408 __restartwin(); 409 410 __echoit = 1; 411 return (OK); 412 } 413 414 int 415 noecho(void) 416 { 417 #ifdef DEBUG 418 __CTRACE("noecho()\n"); 419 #endif 420 /* Check if we need to restart ... */ 421 if (_cursesi_screen->endwin) 422 __restartwin(); 423 424 __echoit = 0; 425 return (OK); 426 } 427 428 int 429 nl(void) 430 { 431 #ifdef DEBUG 432 __CTRACE("nl()\n"); 433 #endif 434 /* Check if we need to restart ... */ 435 if (_cursesi_screen->endwin) 436 __restartwin(); 437 438 if (_cursesi_screen->notty == TRUE) 439 return OK; 440 _cursesi_screen->rawt.c_iflag |= ICRNL; 441 _cursesi_screen->rawt.c_oflag |= ONLCR; 442 _cursesi_screen->cbreakt.c_iflag |= ICRNL; 443 _cursesi_screen->cbreakt.c_oflag |= ONLCR; 444 _cursesi_screen->baset.c_iflag |= ICRNL; 445 _cursesi_screen->baset.c_oflag |= ONLCR; 446 447 _cursesi_screen->nl = 1; 448 _cursesi_screen->pfast = _cursesi_screen->rawmode; 449 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 450 TCSASOFT | TCSADRAIN : TCSADRAIN, 451 _cursesi_screen->curt) ? ERR : OK); 452 } 453 454 int 455 nonl(void) 456 { 457 #ifdef DEBUG 458 __CTRACE("nonl()\n"); 459 #endif 460 /* Check if we need to restart ... */ 461 if (_cursesi_screen->endwin) 462 __restartwin(); 463 464 if (_cursesi_screen->notty == TRUE) 465 return OK; 466 _cursesi_screen->rawt.c_iflag &= ~ICRNL; 467 _cursesi_screen->rawt.c_oflag &= ~ONLCR; 468 _cursesi_screen->cbreakt.c_iflag &= ~ICRNL; 469 _cursesi_screen->cbreakt.c_oflag &= ~ONLCR; 470 _cursesi_screen->baset.c_iflag &= ~ICRNL; 471 _cursesi_screen->baset.c_oflag &= ~ONLCR; 472 473 _cursesi_screen->nl = 0; 474 __pfast = 1; 475 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 476 TCSASOFT | TCSADRAIN : TCSADRAIN, 477 _cursesi_screen->curt) ? ERR : OK); 478 } 479 480 #ifndef _CURSES_USE_MACROS 481 void 482 noqiflush(void) 483 { 484 (void) intrflush(stdscr, FALSE); 485 } 486 487 void 488 qiflush(void) 489 { 490 (void) intrflush(stdscr, TRUE); 491 } 492 #endif /* _CURSES_USE_MACROS */ 493 494 int 495 intrflush(WINDOW *win, bool bf) /*ARGSUSED*/ 496 { 497 /* Check if we need to restart ... */ 498 if (_cursesi_screen->endwin) 499 __restartwin(); 500 501 if (_cursesi_screen->notty == TRUE) 502 return OK; 503 if (bf) { 504 _cursesi_screen->rawt.c_lflag &= ~NOFLSH; 505 _cursesi_screen->cbreakt.c_lflag &= ~NOFLSH; 506 _cursesi_screen->baset.c_lflag &= ~NOFLSH; 507 } else { 508 _cursesi_screen->rawt.c_lflag |= NOFLSH; 509 _cursesi_screen->cbreakt.c_lflag |= NOFLSH; 510 _cursesi_screen->baset.c_lflag |= NOFLSH; 511 } 512 513 __pfast = 1; 514 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 515 TCSASOFT | TCSADRAIN : TCSADRAIN, 516 _cursesi_screen->curt) ? ERR : OK); 517 } 518 519 void 520 __startwin(SCREEN *screen) 521 { 522 523 (void) fflush(screen->infd); 524 525 /* 526 * Some C libraries default to a 1K buffer when talking to a tty. 527 * With a larger screen, especially across a network, we'd like 528 * to get it to all flush in a single write. Make it twice as big 529 * as just the characters (so that we have room for cursor motions 530 * and attribute information) but no more than 8K. 531 */ 532 if (screen->stdbuf == NULL) { 533 screen->len = LINES * COLS * 2; 534 if (screen->len > 8192) 535 screen->len = 8192; 536 if ((screen->stdbuf = malloc(screen->len)) == NULL) 537 screen->len = 0; 538 } 539 (void) setvbuf(screen->outfd, screen->stdbuf, _IOFBF, screen->len); 540 541 t_puts(screen->cursesi_genbuf, __tc_ti, 0, __cputchar_args, 542 (void *) screen->outfd); 543 t_puts(screen->cursesi_genbuf, __tc_vs, 0, __cputchar_args, 544 (void *) screen->outfd); 545 if (screen->curscr->flags & __KEYPAD) 546 t_puts(screen->cursesi_genbuf, __tc_ks, 0, __cputchar_args, 547 (void *) screen->outfd); 548 screen->endwin = 0; 549 } 550 551 int 552 endwin(void) 553 { 554 return __stopwin(); 555 } 556 557 bool 558 isendwin(void) 559 { 560 return (_cursesi_screen->endwin ? TRUE : FALSE); 561 } 562 563 int 564 flushinp(void) 565 { 566 (void) fpurge(_cursesi_screen->infd); 567 return (OK); 568 } 569 570 /* 571 * The following routines, savetty and resetty are completely useless and 572 * are left in only as stubs. If people actually use them they will almost 573 * certainly screw up the state of the world. 574 */ 575 /*static struct termios savedtty;*/ 576 int 577 savetty(void) 578 { 579 if (_cursesi_screen->notty == TRUE) 580 return OK; 581 return (tcgetattr(fileno(_cursesi_screen->infd), 582 &_cursesi_screen->savedtty) ? ERR : OK); 583 } 584 585 int 586 resetty(void) 587 { 588 if (_cursesi_screen->notty == TRUE) 589 return OK; 590 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 591 TCSASOFT | TCSADRAIN : TCSADRAIN, 592 &_cursesi_screen->savedtty) ? ERR : OK); 593 } 594 595 /* 596 * erasechar -- 597 * Return the character of the erase key. 598 */ 599 char 600 erasechar(void) 601 { 602 if (_cursesi_screen->notty == TRUE) 603 return 0; 604 return _cursesi_screen->baset.c_cc[VERASE]; 605 } 606 607 /* 608 * killchar -- 609 * Return the character of the kill key. 610 */ 611 char 612 killchar(void) 613 { 614 if (_cursesi_screen->notty == TRUE) 615 return 0; 616 return _cursesi_screen->baset.c_cc[VKILL]; 617 } 618
Indexes created Fri Sep 26 20:09:58 GMT 2025