tty_pty.c revision 1.12
1 /* 2 * Copyright (c) 1982, 1986, 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)tty_pty.c 7.21 (Berkeley) 5/30/91 34 * $Id: tty_pty.c,v 1.12 1993/08/29 13:47:47 deraadt Exp $ 35 */ 36 37 /* 38 * Pseudo-teletype Driver 39 * (Actually two drivers, requiring two entries in 'cdevsw') 40 */ 41 #include "pty.h" 42 43 #if NPTY > 0 44 #include "param.h" 45 #include "systm.h" 46 #include "ioctl.h" 47 #include "select.h" 48 #include "tty.h" 49 #include "conf.h" 50 #include "file.h" 51 #include "proc.h" 52 #include "uio.h" 53 #include "kernel.h" 54 #include "vnode.h" 55 56 #if NPTY == 1 57 #undef NPTY 58 #define NPTY 32 /* crude XXX */ 59 #endif 60 61 #define BUFSIZ 100 /* Chunk size iomoved to/from user */ 62 63 /* 64 * pts == /dev/tty[pqrs]? 65 * ptc == /dev/pty[pqrs]? 66 */ 67 struct tty *pt_tty[NPTY]; 68 struct pt_ioctl { 69 int pt_flags; 70 struct selinfo pt_selr, pt_selw; 71 u_char pt_send; 72 u_char pt_ucntl; 73 } pt_ioctl[NPTY]; 74 int npty = NPTY; /* for pstat -t */ 75 76 #define PF_COPEN 0x01 /* master open */ 77 #define PF_SOPEN 0x02 /* slave open */ 78 #define PF_PKT 0x08 /* packet mode */ 79 #define PF_STOPPED 0x10 /* user told stopped */ 80 #define PF_REMOTE 0x20 /* remote and flow controlled input */ 81 #define PF_NOSTOP 0x40 82 #define PF_UCNTL 0x80 /* user control mode */ 83 84 void ptcwakeup __P((struct tty *tp, int flag)); 85 86 /*ARGSUSED*/ 87 int 88 ptsopen(dev, flag, devtype, p) 89 dev_t dev; 90 int flag, devtype; 91 struct proc *p; 92 { 93 register struct tty *tp; 94 int error; 95 96 #ifdef lint 97 npty = npty; 98 #endif 99 if (minor(dev) >= NPTY) 100 return (ENXIO); 101 if(!pt_tty[minor(dev)]) { 102 tp = pt_tty[minor(dev)] = ttymalloc(); 103 } else 104 tp = pt_tty[minor(dev)]; 105 if ((tp->t_state & TS_ISOPEN) == 0) { 106 tp->t_state |= TS_WOPEN; 107 ttychars(tp); /* Set up default chars */ 108 tp->t_iflag = TTYDEF_IFLAG; 109 tp->t_oflag = TTYDEF_OFLAG; 110 tp->t_lflag = TTYDEF_LFLAG; 111 tp->t_cflag = TTYDEF_CFLAG; 112 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 113 ttsetwater(tp); /* would be done in xxparam() */ 114 } else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0) 115 return (EBUSY); 116 if (tp->t_oproc) /* Ctrlr still around. */ 117 tp->t_state |= TS_CARR_ON; 118 while ((tp->t_state & TS_CARR_ON) == 0) { 119 tp->t_state |= TS_WOPEN; 120 if (flag&FNONBLOCK) 121 break; 122 if (error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, 123 ttopen, 0)) 124 return (error); 125 } 126 if (error = (*linesw[tp->t_line].l_open)(dev, tp)) 127 return (error); 128 pt_ioctl[minor(dev)].pt_flags |= PF_SOPEN; 129 ptcwakeup(tp, FREAD|FWRITE); 130 return (0); 131 } 132 133 int 134 ptsclose(dev, flag, mode, p) 135 dev_t dev; 136 int flag, mode; 137 struct proc *p; 138 { 139 register struct tty *tp; 140 141 tp = pt_tty[minor(dev)]; 142 (*linesw[tp->t_line].l_close)(tp, flag); 143 ttyclose(tp); 144 ptcwakeup(tp, FREAD|FWRITE); 145 pt_ioctl[minor(dev)].pt_flags &= ~PF_SOPEN; 146 if ((pt_ioctl[minor(dev)].pt_flags & PF_COPEN) == 0) { 147 ttyfree(tp); 148 pt_tty[minor(dev)] = (struct tty *)NULL; 149 } 150 return(0); 151 } 152 153 int 154 ptsread(dev, uio, flag) 155 dev_t dev; 156 struct uio *uio; 157 int flag; 158 { 159 struct proc *p = curproc; 160 register struct tty *tp = pt_tty[minor(dev)]; 161 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 162 int error = 0; 163 164 again: 165 if (pti->pt_flags & PF_REMOTE) { 166 while (isbackground(p, tp)) { 167 if ((p->p_sigignore & sigmask(SIGTTIN)) || 168 (p->p_sigmask & sigmask(SIGTTIN)) || 169 p->p_pgrp->pg_jobc == 0 || 170 p->p_flag&SPPWAIT) 171 return (EIO); 172 pgsignal(p->p_pgrp, SIGTTIN, 1); 173 if (error = ttysleep(tp, (caddr_t)&lbolt, 174 TTIPRI | PCATCH, ttybg, 0)) 175 return (error); 176 } 177 if (tp->t_canq.c_cc == 0) { 178 if (flag & IO_NDELAY) 179 return (EWOULDBLOCK); 180 if (error = ttysleep(tp, (caddr_t)&tp->t_canq, 181 TTIPRI | PCATCH, ttyin, 0)) 182 return (error); 183 goto again; 184 } 185 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 186 if (ureadc(getc(&tp->t_canq), uio) < 0) { 187 error = EFAULT; 188 break; 189 } 190 if (tp->t_canq.c_cc == 1) 191 (void) getc(&tp->t_canq); 192 if (tp->t_canq.c_cc) 193 return (error); 194 } else 195 if (tp->t_oproc) 196 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 197 ptcwakeup(tp, FWRITE); 198 return (error); 199 } 200 201 /* 202 * Write to pseudo-tty. 203 * Wakeups of controlling tty will happen 204 * indirectly, when tty driver calls ptsstart. 205 */ 206 int 207 ptswrite(dev, uio, flag) 208 dev_t dev; 209 struct uio *uio; 210 int flag; 211 { 212 register struct tty *tp; 213 214 tp = pt_tty[minor(dev)]; 215 if (tp->t_oproc == 0) 216 return (EIO); 217 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 218 } 219 220 /* 221 * Start output on pseudo-tty. 222 * Wake up process selecting or sleeping for input from controlling tty. 223 */ 224 void 225 ptsstart(tp) 226 struct tty *tp; 227 { 228 register struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 229 230 if (tp->t_state & TS_TTSTOP) 231 return; 232 if (pti->pt_flags & PF_STOPPED) { 233 pti->pt_flags &= ~PF_STOPPED; 234 pti->pt_send = TIOCPKT_START; 235 } 236 ptcwakeup(tp, FREAD); 237 return; 238 } 239 240 void 241 ptcwakeup(tp, flag) 242 struct tty *tp; 243 int flag; 244 { 245 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 246 247 if (flag & FREAD) { 248 selwakeup(&pti->pt_selr); 249 wakeup((caddr_t)&tp->t_outq.c_cl); 250 } 251 if (flag & FWRITE) { 252 selwakeup(&pti->pt_selw); 253 wakeup((caddr_t)&tp->t_rawq.c_cf); 254 } 255 } 256 257 /*ARGSUSED*/ 258 #ifdef __STDC__ 259 int 260 ptcopen(dev_t dev, int flag, int devtype, struct proc *p) 261 #else 262 int 263 ptcopen(dev, flag, devtype, p) 264 dev_t dev; 265 int flag, devtype; 266 struct proc *p; 267 #endif 268 { 269 register struct tty *tp; 270 struct pt_ioctl *pti; 271 272 if (minor(dev) >= NPTY) 273 return (ENXIO); 274 if(!pt_tty[minor(dev)]) { 275 tp = pt_tty[minor(dev)] = ttymalloc(); 276 } else 277 tp = pt_tty[minor(dev)]; 278 if (tp->t_oproc) 279 return (EIO); 280 tp->t_oproc = ptsstart; 281 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 282 tp->t_lflag &= ~EXTPROC; 283 pti = &pt_ioctl[minor(dev)]; 284 pti->pt_flags &= PF_SOPEN; 285 pti->pt_flags |= PF_COPEN; 286 pti->pt_send = 0; 287 pti->pt_ucntl = 0; 288 return (0); 289 } 290 291 extern struct tty *constty; /* -hv- 06.Oct.92*/ 292 293 int 294 ptcclose(dev) 295 dev_t dev; 296 { 297 register struct tty *tp; 298 299 tp = pt_tty[minor(dev)]; 300 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 301 tp->t_state &= ~TS_CARR_ON; 302 tp->t_oproc = 0; /* mark closed */ 303 tp->t_session = 0; 304 305 /* XXX -hv- 6.Oct.92 this prevents the "hanging console bug" with X11 */ 306 if (constty==tp) 307 constty = 0; 308 309 pt_ioctl[minor(dev)].pt_flags &= ~PF_COPEN; 310 if ((pt_ioctl[minor(dev)].pt_flags & PF_SOPEN) == 0) { 311 ttyfree(tp); 312 pt_tty[minor(dev)] = (struct tty *)NULL; 313 } 314 return (0); 315 } 316 317 int 318 ptcread(dev, uio, flag) 319 dev_t dev; 320 struct uio *uio; 321 int flag; 322 { 323 register struct tty *tp = pt_tty[minor(dev)]; 324 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 325 u_char buf[BUFSIZ]; 326 int error = 0, cc; 327 328 /* 329 * We want to block until the slave 330 * is open, and there's something to read; 331 * but if we lost the slave or we're NBIO, 332 * then return the appropriate error instead. 333 */ 334 for (;;) { 335 if (tp->t_state&TS_ISOPEN) { 336 if (pti->pt_flags&PF_PKT && pti->pt_send) { 337 error = ureadc((int)pti->pt_send, uio); 338 if (error) 339 return (error); 340 if (pti->pt_send & TIOCPKT_IOCTL) { 341 cc = MIN(uio->uio_resid, 342 sizeof(tp->t_termios)); 343 uiomove((caddr_t)&tp->t_termios, cc, 344 uio); 345 } 346 pti->pt_send = 0; 347 return (0); 348 } 349 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 350 error = ureadc((int)pti->pt_ucntl, uio); 351 if (error) 352 return (error); 353 pti->pt_ucntl = 0; 354 return (0); 355 } 356 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 357 break; 358 } 359 if ((tp->t_state&TS_CARR_ON) == 0) 360 return (0); /* EOF */ 361 if (flag & IO_NDELAY) 362 return (EWOULDBLOCK); 363 if (error = tsleep((caddr_t)&tp->t_outq.c_cl, TTIPRI | PCATCH, 364 ttyin, 0)) 365 return (error); 366 } 367 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 368 error = ureadc(0, uio); 369 while (uio->uio_resid > 0 && error == 0) { 370 cc = q_to_b(&tp->t_outq, buf, MIN(uio->uio_resid, BUFSIZ)); 371 if (cc <= 0) 372 break; 373 error = uiomove(buf, cc, uio); 374 } 375 if (tp->t_outq.c_cc <= tp->t_lowat) { 376 if (tp->t_state&TS_ASLEEP) { 377 tp->t_state &= ~TS_ASLEEP; 378 wakeup((caddr_t)&tp->t_outq); 379 } 380 selwakeup(&tp->t_wsel); 381 } 382 return (error); 383 } 384 385 void 386 ptsstop(tp, flush) 387 register struct tty *tp; 388 int flush; 389 { 390 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 391 int flag; 392 393 /* note: FLUSHREAD and FLUSHWRITE already ok */ 394 if (flush == 0) { 395 flush = TIOCPKT_STOP; 396 pti->pt_flags |= PF_STOPPED; 397 } else 398 pti->pt_flags &= ~PF_STOPPED; 399 pti->pt_send |= flush; 400 /* change of perspective */ 401 flag = 0; 402 if (flush & FREAD) 403 flag |= FWRITE; 404 if (flush & FWRITE) 405 flag |= FREAD; 406 ptcwakeup(tp, flag); 407 } 408 409 int 410 ptcselect(dev, rw, p) 411 dev_t dev; 412 int rw; 413 struct proc *p; 414 { 415 register struct tty *tp = pt_tty[minor(dev)]; 416 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 417 int s; 418 419 if ((tp->t_state&TS_CARR_ON) == 0) 420 return (1); 421 switch (rw) { 422 423 case FREAD: 424 /* 425 * Need to block timeouts (ttrstart). 426 */ 427 s = spltty(); 428 if ((tp->t_state&TS_ISOPEN) && 429 tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) { 430 splx(s); 431 return (1); 432 } 433 splx(s); 434 /* FALLTHROUGH */ 435 436 case 0: /* exceptional */ 437 if ((tp->t_state&TS_ISOPEN) && 438 (pti->pt_flags&PF_PKT && pti->pt_send || 439 pti->pt_flags&PF_UCNTL && pti->pt_ucntl)) 440 return (1); 441 selrecord(p, &pti->pt_selr); 442 break; 443 444 445 case FWRITE: 446 if (tp->t_state&TS_ISOPEN) { 447 if (pti->pt_flags & PF_REMOTE) { 448 if (tp->t_canq.c_cc == 0) 449 return (1); 450 } else { 451 if (tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG-2) 452 return (1); 453 if (tp->t_canq.c_cc == 0 && (tp->t_iflag&ICANON)) 454 return (1); 455 } 456 } 457 selrecord(p, &pti->pt_selw); 458 break; 459 460 } 461 return (0); 462 } 463 464 int 465 ptcwrite(dev, uio, flag) 466 dev_t dev; 467 register struct uio *uio; 468 int flag; 469 { 470 register struct tty *tp = pt_tty[minor(dev)]; 471 register u_char *cp; 472 register int cc = 0; 473 u_char locbuf[BUFSIZ]; 474 int cnt = 0; 475 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 476 int error = 0; 477 478 again: 479 if ((tp->t_state&TS_ISOPEN) == 0) 480 goto block; 481 if (pti->pt_flags & PF_REMOTE) { 482 if (tp->t_canq.c_cc) 483 goto block; 484 while (uio->uio_resid > 0 && tp->t_canq.c_cc < TTYHOG - 1) { 485 if (cc == 0) { 486 cc = min(uio->uio_resid, BUFSIZ); 487 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 488 cp = locbuf; 489 error = uiomove((caddr_t)cp, cc, uio); 490 if (error) 491 return (error); 492 /* check again for safety */ 493 if ((tp->t_state&TS_ISOPEN) == 0) 494 return (EIO); 495 } 496 if (cc) 497 (void) b_to_q(cp, cc, &tp->t_canq); 498 cc = 0; 499 } 500 (void) putc(0, &tp->t_canq); 501 ttwakeup(tp); 502 wakeup((caddr_t)&tp->t_canq); 503 return (0); 504 } 505 while (uio->uio_resid > 0) { 506 if (cc == 0) { 507 cc = min(uio->uio_resid, BUFSIZ); 508 cp = locbuf; 509 error = uiomove((caddr_t)cp, cc, uio); 510 if (error) 511 return (error); 512 /* check again for safety */ 513 if ((tp->t_state&TS_ISOPEN) == 0) 514 return (EIO); 515 } 516 while (cc > 0) { 517 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 518 (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) { 519 wakeup((caddr_t)&tp->t_rawq); 520 goto block; 521 } 522 (*linesw[tp->t_line].l_rint)(*cp++, tp); 523 cnt++; 524 cc--; 525 } 526 cc = 0; 527 } 528 return (0); 529 block: 530 /* 531 * Come here to wait for slave to open, for space 532 * in outq, or space in rawq. 533 */ 534 if ((tp->t_state&TS_CARR_ON) == 0) 535 return (EIO); 536 if (flag & IO_NDELAY) { 537 /* adjust for data copied in but not written */ 538 uio->uio_resid += cc; 539 if (cnt == 0) 540 return (EWOULDBLOCK); 541 return (0); 542 } 543 if (error = tsleep((caddr_t)&tp->t_rawq.c_cf, TTOPRI | PCATCH, 544 ttyout, 0)) { 545 /* adjust for data copied in but not written */ 546 uio->uio_resid += cc; 547 return (error); 548 } 549 goto again; 550 } 551 552 /*ARGSUSED*/ 553 int 554 ptyioctl(dev, cmd, data, flag) 555 caddr_t data; 556 int cmd, flag; 557 dev_t dev; 558 { 559 register struct tty *tp = pt_tty[minor(dev)]; 560 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 561 register u_char *cc = tp->t_cc; 562 int stop, error; 563 564 /* 565 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 566 * ttywflush(tp) will hang if there are characters in the outq. 567 */ 568 if (cmd == TIOCEXT) { 569 /* 570 * When the EXTPROC bit is being toggled, we need 571 * to send an TIOCPKT_IOCTL if the packet driver 572 * is turned on. 573 */ 574 if (*(int *)data) { 575 if (pti->pt_flags & PF_PKT) { 576 pti->pt_send |= TIOCPKT_IOCTL; 577 ptcwakeup(tp, FREAD); 578 } 579 tp->t_lflag |= EXTPROC; 580 } else { 581 if ((tp->t_state & EXTPROC) && 582 (pti->pt_flags & PF_PKT)) { 583 pti->pt_send |= TIOCPKT_IOCTL; 584 ptcwakeup(tp, FREAD); 585 } 586 tp->t_lflag &= ~EXTPROC; 587 } 588 return(0); 589 } else 590 if (cdevsw[major(dev)].d_open == ptcopen) 591 switch (cmd) { 592 593 case TIOCGPGRP: 594 /* 595 * We aviod calling ttioctl on the controller since, 596 * in that case, tp must be the controlling terminal. 597 */ 598 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 599 return (0); 600 601 case TIOCPKT: 602 if (*(int *)data) { 603 if (pti->pt_flags & PF_UCNTL) 604 return (EINVAL); 605 pti->pt_flags |= PF_PKT; 606 } else 607 pti->pt_flags &= ~PF_PKT; 608 return (0); 609 610 case TIOCUCNTL: 611 if (*(int *)data) { 612 if (pti->pt_flags & PF_PKT) 613 return (EINVAL); 614 pti->pt_flags |= PF_UCNTL; 615 } else 616 pti->pt_flags &= ~PF_UCNTL; 617 return (0); 618 619 case TIOCREMOTE: 620 if (*(int *)data) 621 pti->pt_flags |= PF_REMOTE; 622 else 623 pti->pt_flags &= ~PF_REMOTE; 624 ttyflush(tp, FREAD|FWRITE); 625 return (0); 626 627 #ifdef COMPAT_43 628 /* wkt */ 629 case TIOCSETP: 630 case TIOCSETN: 631 #endif 632 case TIOCSETD: 633 case TIOCSETA: 634 case TIOCSETAW: 635 case TIOCSETAF: 636 flushq(&tp->t_outq); 637 break; 638 639 case TIOCSIG: 640 if (*(unsigned int *)data >= NSIG) 641 return(EINVAL); 642 if ((tp->t_lflag&NOFLSH) == 0) 643 ttyflush(tp, FREAD|FWRITE); 644 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 645 if ((*(unsigned int *)data == SIGINFO) && 646 ((tp->t_lflag&NOKERNINFO) == 0)) 647 ttyinfo(tp); 648 return(0); 649 } 650 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag); 651 if (error < 0) 652 error = ttioctl(tp, cmd, data, flag); 653 /* 654 * Since we use the tty queues internally, 655 * pty's can't be switched to disciplines which overwrite 656 * the queues. We can't tell anything about the discipline 657 * from here... 658 */ 659 if (linesw[tp->t_line].l_rint != ttyinput) { 660 (*linesw[tp->t_line].l_close)(tp, flag); 661 tp->t_line = TTYDISC; 662 (void)(*linesw[tp->t_line].l_open)(dev, tp); 663 error = ENOTTY; 664 } 665 if (error < 0) { 666 if (pti->pt_flags & PF_UCNTL && 667 (cmd & ~0xff) == UIOCCMD(0)) { 668 if (cmd & 0xff) { 669 pti->pt_ucntl = (u_char)cmd; 670 ptcwakeup(tp, FREAD); 671 } 672 return (0); 673 } 674 error = ENOTTY; 675 } 676 /* 677 * If external processing and packet mode send ioctl packet. 678 */ 679 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 680 switch(cmd) { 681 case TIOCSETA: 682 case TIOCSETAW: 683 case TIOCSETAF: 684 #ifdef COMPAT_43 685 /* wkt */ 686 case TIOCSETP: 687 case TIOCSETN: 688 case TIOCSETC: 689 case TIOCSLTC: 690 case TIOCLBIS: 691 case TIOCLBIC: 692 case TIOCLSET: 693 #endif 694 pti->pt_send |= TIOCPKT_IOCTL; 695 default: 696 break; 697 } 698 } 699 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 700 && CCEQ(cc[VSTART], CTRL('q')); 701 if (pti->pt_flags & PF_NOSTOP) { 702 if (stop) { 703 pti->pt_send &= ~TIOCPKT_NOSTOP; 704 pti->pt_send |= TIOCPKT_DOSTOP; 705 pti->pt_flags &= ~PF_NOSTOP; 706 ptcwakeup(tp, FREAD); 707 } 708 } else { 709 if (!stop) { 710 pti->pt_send &= ~TIOCPKT_DOSTOP; 711 pti->pt_send |= TIOCPKT_NOSTOP; 712 pti->pt_flags |= PF_NOSTOP; 713 ptcwakeup(tp, FREAD); 714 } 715 } 716 return (error); 717 } 718 #endif 719
Indexes created Tue Sep 23 02:09:52 GMT 2025