tty.c revision 1.30
1 /* $NetBSD: tty.c,v 1.30 2003/01/09 12:48:06 blymn 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 1.30 2003/01/09 12:48:06 blymn 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 /* if we were in halfdelay mode then nuke the timeout */ 229 if ((_cursesi_screen->half_delay == TRUE) && 230 (__notimeout() == ERR)) 231 return ERR; 232 233 _cursesi_screen->half_delay = FALSE; 234 _cursesi_screen->curt = _cursesi_screen->useraw ? 235 &_cursesi_screen->rawt : &_cursesi_screen->baset; 236 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 237 TCSASOFT | TCSADRAIN : TCSADRAIN, 238 _cursesi_screen->curt) ? ERR : OK); 239 } 240 241 /* 242 * halfdelay -- 243 * Put the terminal into cbreak mode with the specified timeout. 244 * 245 */ 246 int 247 halfdelay(int timeout) 248 { 249 if ((timeout < 1) || (timeout > 255)) 250 return ERR; 251 252 if (cbreak() == ERR) 253 return ERR; 254 255 if (__timeout(timeout) == ERR) 256 return ERR; 257 258 _cursesi_screen->half_delay = TRUE; 259 return OK; 260 } 261 262 int 263 __delay(void) 264 { 265 /* Check if we need to restart ... */ 266 if (_cursesi_screen->endwin) 267 __restartwin(); 268 269 if (_cursesi_screen->notty == TRUE) 270 return OK; 271 _cursesi_screen->rawt.c_cc[VMIN] = 1; 272 _cursesi_screen->rawt.c_cc[VTIME] = 0; 273 _cursesi_screen->cbreakt.c_cc[VMIN] = 1; 274 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 275 _cursesi_screen->baset.c_cc[VMIN] = 1; 276 _cursesi_screen->baset.c_cc[VTIME] = 0; 277 278 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 279 TCSASOFT : TCSANOW, _cursesi_screen->curt) ? ERR : OK); 280 } 281 282 int 283 __nodelay(void) 284 { 285 /* Check if we need to restart ... */ 286 if (_cursesi_screen->endwin) 287 __restartwin(); 288 289 if (_cursesi_screen->notty == TRUE) 290 return OK; 291 _cursesi_screen->rawt.c_cc[VMIN] = 0; 292 _cursesi_screen->rawt.c_cc[VTIME] = 0; 293 _cursesi_screen->cbreakt.c_cc[VMIN] = 0; 294 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 295 _cursesi_screen->baset.c_cc[VMIN] = 0; 296 _cursesi_screen->baset.c_cc[VTIME] = 0; 297 298 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 299 TCSASOFT : TCSANOW, _cursesi_screen->curt) ? ERR : OK); 300 } 301 302 void 303 __save_termios(void) 304 { 305 /* Check if we need to restart ... */ 306 if (_cursesi_screen->endwin) 307 __restartwin(); 308 309 if (_cursesi_screen->notty == TRUE) 310 return; 311 _cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN]; 312 _cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME]; 313 } 314 315 void 316 __restore_termios(void) 317 { 318 /* Check if we need to restart ... */ 319 if (_cursesi_screen->endwin) 320 __restartwin(); 321 322 if (_cursesi_screen->notty == TRUE) 323 return; 324 _cursesi_screen->rawt.c_cc[VMIN] = _cursesi_screen->ovmin; 325 _cursesi_screen->rawt.c_cc[VTIME] = _cursesi_screen->ovtime; 326 _cursesi_screen->cbreakt.c_cc[VMIN] = _cursesi_screen->ovmin; 327 _cursesi_screen->cbreakt.c_cc[VTIME] = _cursesi_screen->ovtime; 328 _cursesi_screen->baset.c_cc[VMIN] = _cursesi_screen->ovmin; 329 _cursesi_screen->baset.c_cc[VTIME] = _cursesi_screen->ovtime; 330 } 331 332 int 333 __timeout(int delay) 334 { 335 /* Check if we need to restart ... */ 336 if (_cursesi_screen->endwin) 337 __restartwin(); 338 339 if (_cursesi_screen->notty == TRUE) 340 return OK; 341 _cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN]; 342 _cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME]; 343 _cursesi_screen->rawt.c_cc[VMIN] = 0; 344 _cursesi_screen->rawt.c_cc[VTIME] = delay; 345 _cursesi_screen->cbreakt.c_cc[VMIN] = 0; 346 _cursesi_screen->cbreakt.c_cc[VTIME] = delay; 347 _cursesi_screen->baset.c_cc[VMIN] = 0; 348 _cursesi_screen->baset.c_cc[VTIME] = delay; 349 350 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 351 TCSASOFT | TCSANOW : TCSANOW, 352 _cursesi_screen->curt) ? ERR : OK); 353 } 354 355 int 356 __notimeout(void) 357 { 358 /* Check if we need to restart ... */ 359 if (_cursesi_screen->endwin) 360 __restartwin(); 361 362 if (_cursesi_screen->notty == TRUE) 363 return OK; 364 _cursesi_screen->rawt.c_cc[VMIN] = 1; 365 _cursesi_screen->rawt.c_cc[VTIME] = 0; 366 _cursesi_screen->cbreakt.c_cc[VMIN] = 1; 367 _cursesi_screen->cbreakt.c_cc[VTIME] = 0; 368 _cursesi_screen->baset.c_cc[VMIN] = 1; 369 _cursesi_screen->baset.c_cc[VTIME] = 0; 370 371 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 372 TCSASOFT | TCSANOW : TCSANOW, 373 _cursesi_screen->curt) ? ERR : OK); 374 } 375 376 int 377 echo(void) 378 { 379 /* Check if we need to restart ... */ 380 if (_cursesi_screen->endwin) 381 __restartwin(); 382 383 __echoit = 1; 384 return (OK); 385 } 386 387 int 388 noecho(void) 389 { 390 /* Check if we need to restart ... */ 391 if (_cursesi_screen->endwin) 392 __restartwin(); 393 394 __echoit = 0; 395 return (OK); 396 } 397 398 int 399 nl(void) 400 { 401 /* Check if we need to restart ... */ 402 if (_cursesi_screen->endwin) 403 __restartwin(); 404 405 if (_cursesi_screen->notty == TRUE) 406 return OK; 407 _cursesi_screen->rawt.c_iflag |= ICRNL; 408 _cursesi_screen->rawt.c_oflag |= ONLCR; 409 _cursesi_screen->cbreakt.c_iflag |= ICRNL; 410 _cursesi_screen->cbreakt.c_oflag |= ONLCR; 411 _cursesi_screen->baset.c_iflag |= ICRNL; 412 _cursesi_screen->baset.c_oflag |= ONLCR; 413 414 _cursesi_screen->pfast = _cursesi_screen->rawmode; 415 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 416 TCSASOFT | TCSADRAIN : TCSADRAIN, 417 _cursesi_screen->curt) ? ERR : OK); 418 } 419 420 int 421 nonl(void) 422 { 423 /* Check if we need to restart ... */ 424 if (_cursesi_screen->endwin) 425 __restartwin(); 426 427 if (_cursesi_screen->notty == TRUE) 428 return OK; 429 _cursesi_screen->rawt.c_iflag &= ~ICRNL; 430 _cursesi_screen->rawt.c_oflag &= ~ONLCR; 431 _cursesi_screen->cbreakt.c_iflag &= ~ICRNL; 432 _cursesi_screen->cbreakt.c_oflag &= ~ONLCR; 433 _cursesi_screen->baset.c_iflag &= ~ICRNL; 434 _cursesi_screen->baset.c_oflag &= ~ONLCR; 435 436 __pfast = 1; 437 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 438 TCSASOFT | TCSADRAIN : TCSADRAIN, 439 _cursesi_screen->curt) ? ERR : OK); 440 } 441 442 int 443 intrflush(WINDOW *win, bool bf) /*ARGSUSED*/ 444 { 445 /* Check if we need to restart ... */ 446 if (_cursesi_screen->endwin) 447 __restartwin(); 448 449 if (_cursesi_screen->notty == TRUE) 450 return OK; 451 if (bf) { 452 _cursesi_screen->rawt.c_lflag &= ~NOFLSH; 453 _cursesi_screen->cbreakt.c_lflag &= ~NOFLSH; 454 _cursesi_screen->baset.c_lflag &= ~NOFLSH; 455 } else { 456 _cursesi_screen->rawt.c_lflag |= NOFLSH; 457 _cursesi_screen->cbreakt.c_lflag |= NOFLSH; 458 _cursesi_screen->baset.c_lflag |= NOFLSH; 459 } 460 461 __pfast = 1; 462 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 463 TCSASOFT | TCSADRAIN : TCSADRAIN, 464 _cursesi_screen->curt) ? ERR : OK); 465 } 466 467 void 468 __startwin(SCREEN *screen) 469 { 470 471 (void) fflush(screen->infd); 472 473 /* 474 * Some C libraries default to a 1K buffer when talking to a tty. 475 * With a larger screen, especially across a network, we'd like 476 * to get it to all flush in a single write. Make it twice as big 477 * as just the characters (so that we have room for cursor motions 478 * and attribute information) but no more than 8K. 479 */ 480 if (screen->stdbuf == NULL) { 481 screen->len = LINES * COLS * 2; 482 if (screen->len > 8192) 483 screen->len = 8192; 484 if ((screen->stdbuf = malloc(screen->len)) == NULL) 485 screen->len = 0; 486 } 487 (void) setvbuf(screen->outfd, screen->stdbuf, _IOFBF, screen->len); 488 489 t_puts(screen->cursesi_genbuf, __tc_ti, 0, __cputchar_args, 490 (void *) screen->outfd); 491 t_puts(screen->cursesi_genbuf, __tc_vs, 0, __cputchar_args, 492 (void *) screen->outfd); 493 if (screen->curscr->flags & __KEYPAD) 494 t_puts(screen->cursesi_genbuf, __tc_ks, 0, __cputchar_args, 495 (void *) screen->outfd); 496 screen->endwin = 0; 497 } 498 499 int 500 endwin(void) 501 { 502 return __stopwin(); 503 } 504 505 bool 506 isendwin(void) 507 { 508 return (_cursesi_screen->endwin ? TRUE : FALSE); 509 } 510 511 int 512 flushinp(void) 513 { 514 (void) fpurge(_cursesi_screen->infd); 515 return (OK); 516 } 517 518 /* 519 * The following routines, savetty and resetty are completely useless and 520 * are left in only as stubs. If people actually use them they will almost 521 * certainly screw up the state of the world. 522 */ 523 /*static struct termios savedtty;*/ 524 int 525 savetty(void) 526 { 527 if (_cursesi_screen->notty == TRUE) 528 return OK; 529 return (tcgetattr(fileno(_cursesi_screen->infd), 530 &_cursesi_screen->savedtty) ? ERR : OK); 531 } 532 533 int 534 resetty(void) 535 { 536 if (_cursesi_screen->notty == TRUE) 537 return OK; 538 return (tcsetattr(fileno(_cursesi_screen->infd), __tcaction ? 539 TCSASOFT | TCSADRAIN : TCSADRAIN, 540 &_cursesi_screen->savedtty) ? ERR : OK); 541 } 542 543 /* 544 * erasechar -- 545 * Return the character of the erase key. 546 * 547 */ 548 char 549 erasechar(void) 550 { 551 if (_cursesi_screen->notty == TRUE) 552 return 0; 553 return _cursesi_screen->baset.c_cc[VERASE]; 554 } 555 556 /* 557 * killchar -- 558 * Return the character of the kill key. 559 */ 560 char 561 killchar(void) 562 { 563 if (_cursesi_screen->notty == TRUE) 564 return 0; 565 return _cursesi_screen->baset.c_cc[VKILL]; 566 } 567
Indexes created Fri Sep 26 20:09:58 GMT 2025