tty_pty.c revision 1.43
1 /* $NetBSD: tty_pty.c,v 1.43 2000/03/30 09:27:13 augustss Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1993 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 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95 36 */ 37 38 /* 39 * Pseudo-teletype Driver 40 * (Actually two drivers, requiring two entries in 'cdevsw') 41 */ 42 43 #include "opt_compat_sunos.h" 44 45 #include "pty.h" /* XXX */ 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/ioctl.h> 50 #include <sys/proc.h> 51 #include <sys/tty.h> 52 #include <sys/file.h> 53 #include <sys/uio.h> 54 #include <sys/kernel.h> 55 #include <sys/vnode.h> 56 #include <sys/signalvar.h> 57 #include <sys/uio.h> 58 #include <sys/conf.h> 59 #include <sys/poll.h> 60 61 62 63 #if NPTY == 1 64 #undef NPTY 65 #define NPTY 32 /* crude XXX */ 66 #endif 67 68 /* Macros to clear/set/test flags. */ 69 #define SET(t, f) (t) |= (f) 70 #define CLR(t, f) (t) &= ~((unsigned)(f)) 71 #define ISSET(t, f) ((t) & (f)) 72 73 #define BUFSIZ 100 /* Chunk size iomoved to/from user */ 74 75 /* 76 * pts == /dev/tty[pqrs]? 77 * ptc == /dev/pty[pqrs]? 78 */ 79 struct pt_softc { 80 struct tty *pt_tty; 81 int pt_flags; 82 struct selinfo pt_selr, pt_selw; 83 u_char pt_send; 84 u_char pt_ucntl; 85 } pt_softc[NPTY]; /* XXX */ 86 int npty = NPTY; /* for pstat -t */ 87 88 #define PF_PKT 0x08 /* packet mode */ 89 #define PF_STOPPED 0x10 /* user told stopped */ 90 #define PF_REMOTE 0x20 /* remote and flow controlled input */ 91 #define PF_NOSTOP 0x40 92 #define PF_UCNTL 0x80 /* user control mode */ 93 94 void ptyattach __P((int)); 95 void ptcwakeup __P((struct tty *, int)); 96 struct tty *ptytty __P((dev_t)); 97 void ptsstart __P((struct tty *)); 98 99 /* 100 * Establish n (or default if n is 1) ptys in the system. 101 */ 102 void 103 ptyattach(n) 104 int n; 105 { 106 #ifdef notyet 107 #define DEFAULT_NPTY 32 108 109 /* maybe should allow 0 => none? */ 110 if (n <= 1) 111 n = DEFAULT_NPTY; 112 pt_softc = malloc(n * sizeof(struct pt_softc), M_DEVBUF, M_WAITOK); 113 npty = n; 114 #endif 115 } 116 117 /*ARGSUSED*/ 118 int 119 ptsopen(dev, flag, devtype, p) 120 dev_t dev; 121 int flag, devtype; 122 struct proc *p; 123 { 124 struct pt_softc *pti; 125 struct tty *tp; 126 int error; 127 128 if (minor(dev) >= npty) 129 return (ENXIO); 130 pti = &pt_softc[minor(dev)]; 131 if (!pti->pt_tty) { 132 tp = pti->pt_tty = ttymalloc(); 133 tty_attach(tp); 134 } 135 else 136 tp = pti->pt_tty; 137 if (!ISSET(tp->t_state, TS_ISOPEN)) { 138 ttychars(tp); /* Set up default chars */ 139 tp->t_iflag = TTYDEF_IFLAG; 140 tp->t_oflag = TTYDEF_OFLAG; 141 tp->t_lflag = TTYDEF_LFLAG; 142 tp->t_cflag = TTYDEF_CFLAG; 143 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 144 ttsetwater(tp); /* would be done in xxparam() */ 145 } else if (ISSET(tp->t_state, TS_XCLUDE) && p->p_ucred->cr_uid != 0) 146 return (EBUSY); 147 if (tp->t_oproc) /* Ctrlr still around. */ 148 SET(tp->t_state, TS_CARR_ON); 149 if (!ISSET(flag, O_NONBLOCK)) 150 while (!ISSET(tp->t_state, TS_CARR_ON)) { 151 tp->t_wopen++; 152 error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH, 153 ttopen, 0); 154 tp->t_wopen--; 155 if (error) 156 return (error); 157 } 158 error = (*linesw[tp->t_line].l_open)(dev, tp); 159 ptcwakeup(tp, FREAD|FWRITE); 160 return (error); 161 } 162 163 int 164 ptsclose(dev, flag, mode, p) 165 dev_t dev; 166 int flag, mode; 167 struct proc *p; 168 { 169 struct pt_softc *pti = &pt_softc[minor(dev)]; 170 struct tty *tp = pti->pt_tty; 171 int error; 172 173 error = (*linesw[tp->t_line].l_close)(tp, flag); 174 error |= ttyclose(tp); 175 ptcwakeup(tp, FREAD|FWRITE); 176 return (error); 177 } 178 179 int 180 ptsread(dev, uio, flag) 181 dev_t dev; 182 struct uio *uio; 183 int flag; 184 { 185 struct proc *p = curproc; 186 struct pt_softc *pti = &pt_softc[minor(dev)]; 187 struct tty *tp = pti->pt_tty; 188 int error = 0; 189 190 again: 191 if (pti->pt_flags & PF_REMOTE) { 192 while (isbackground(p, tp)) { 193 if (sigismember(&p->p_sigignore, SIGTTIN) || 194 sigismember(&p->p_sigmask, SIGTTIN) || 195 p->p_pgrp->pg_jobc == 0 || 196 p->p_flag & P_PPWAIT) 197 return (EIO); 198 pgsignal(p->p_pgrp, SIGTTIN, 1); 199 error = ttysleep(tp, (caddr_t)&lbolt, 200 TTIPRI | PCATCH, ttybg, 0); 201 if (error) 202 return (error); 203 } 204 if (tp->t_canq.c_cc == 0) { 205 if (flag & IO_NDELAY) 206 return (EWOULDBLOCK); 207 error = ttysleep(tp, (caddr_t)&tp->t_canq, 208 TTIPRI | PCATCH, ttyin, 0); 209 if (error) 210 return (error); 211 goto again; 212 } 213 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 214 if (ureadc(getc(&tp->t_canq), uio) < 0) { 215 error = EFAULT; 216 break; 217 } 218 if (tp->t_canq.c_cc == 1) 219 (void) getc(&tp->t_canq); 220 if (tp->t_canq.c_cc) 221 return (error); 222 } else 223 if (tp->t_oproc) 224 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 225 ptcwakeup(tp, FWRITE); 226 return (error); 227 } 228 229 /* 230 * Write to pseudo-tty. 231 * Wakeups of controlling tty will happen 232 * indirectly, when tty driver calls ptsstart. 233 */ 234 int 235 ptswrite(dev, uio, flag) 236 dev_t dev; 237 struct uio *uio; 238 int flag; 239 { 240 struct pt_softc *pti = &pt_softc[minor(dev)]; 241 struct tty *tp = pti->pt_tty; 242 243 if (tp->t_oproc == 0) 244 return (EIO); 245 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 246 } 247 248 /* 249 * Start output on pseudo-tty. 250 * Wake up process polling or sleeping for input from controlling tty. 251 */ 252 void 253 ptsstart(tp) 254 struct tty *tp; 255 { 256 struct pt_softc *pti = &pt_softc[minor(tp->t_dev)]; 257 258 if (ISSET(tp->t_state, TS_TTSTOP)) 259 return; 260 if (pti->pt_flags & PF_STOPPED) { 261 pti->pt_flags &= ~PF_STOPPED; 262 pti->pt_send = TIOCPKT_START; 263 } 264 ptcwakeup(tp, FREAD); 265 } 266 267 void 268 ptsstop(tp, flush) 269 struct tty *tp; 270 int flush; 271 { 272 struct pt_softc *pti = &pt_softc[minor(tp->t_dev)]; 273 int flag; 274 275 /* note: FLUSHREAD and FLUSHWRITE already ok */ 276 if (flush == 0) { 277 flush = TIOCPKT_STOP; 278 pti->pt_flags |= PF_STOPPED; 279 } else 280 pti->pt_flags &= ~PF_STOPPED; 281 pti->pt_send |= flush; 282 /* change of perspective */ 283 flag = 0; 284 if (flush & FREAD) 285 flag |= FWRITE; 286 if (flush & FWRITE) 287 flag |= FREAD; 288 ptcwakeup(tp, flag); 289 } 290 291 void 292 ptcwakeup(tp, flag) 293 struct tty *tp; 294 int flag; 295 { 296 struct pt_softc *pti = &pt_softc[minor(tp->t_dev)]; 297 298 if (flag & FREAD) { 299 selwakeup(&pti->pt_selr); 300 wakeup((caddr_t)&tp->t_outq.c_cf); 301 } 302 if (flag & FWRITE) { 303 selwakeup(&pti->pt_selw); 304 wakeup((caddr_t)&tp->t_rawq.c_cf); 305 } 306 } 307 308 int ptcopen __P((dev_t, int, int, struct proc *)); 309 310 /*ARGSUSED*/ 311 int 312 ptcopen(dev, flag, devtype, p) 313 dev_t dev; 314 int flag, devtype; 315 struct proc *p; 316 { 317 struct pt_softc *pti; 318 struct tty *tp; 319 320 if (minor(dev) >= npty) 321 return (ENXIO); 322 pti = &pt_softc[minor(dev)]; 323 if (!pti->pt_tty) { 324 tp = pti->pt_tty = ttymalloc(); 325 tty_attach(tp); 326 } 327 else 328 tp = pti->pt_tty; 329 if (tp->t_oproc) 330 return (EIO); 331 tp->t_oproc = ptsstart; 332 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 333 CLR(tp->t_lflag, EXTPROC); 334 pti->pt_flags = 0; 335 pti->pt_send = 0; 336 pti->pt_ucntl = 0; 337 return (0); 338 } 339 340 /*ARGSUSED*/ 341 int 342 ptcclose(dev, flag, devtype, p) 343 dev_t dev; 344 int flag, devtype; 345 struct proc *p; 346 { 347 struct pt_softc *pti = &pt_softc[minor(dev)]; 348 struct tty *tp = pti->pt_tty; 349 350 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 351 CLR(tp->t_state, TS_CARR_ON); 352 tp->t_oproc = 0; /* mark closed */ 353 return (0); 354 } 355 356 int 357 ptcread(dev, uio, flag) 358 dev_t dev; 359 struct uio *uio; 360 int flag; 361 { 362 struct pt_softc *pti = &pt_softc[minor(dev)]; 363 struct tty *tp = pti->pt_tty; 364 char buf[BUFSIZ]; 365 int error = 0, cc; 366 367 /* 368 * We want to block until the slave 369 * is open, and there's something to read; 370 * but if we lost the slave or we're NBIO, 371 * then return the appropriate error instead. 372 */ 373 for (;;) { 374 if (ISSET(tp->t_state, TS_ISOPEN)) { 375 if (pti->pt_flags&PF_PKT && pti->pt_send) { 376 error = ureadc((int)pti->pt_send, uio); 377 if (error) 378 return (error); 379 if (pti->pt_send & TIOCPKT_IOCTL) { 380 cc = min(uio->uio_resid, 381 sizeof(tp->t_termios)); 382 uiomove((caddr_t) &tp->t_termios, 383 cc, uio); 384 } 385 pti->pt_send = 0; 386 return (0); 387 } 388 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 389 error = ureadc((int)pti->pt_ucntl, uio); 390 if (error) 391 return (error); 392 pti->pt_ucntl = 0; 393 return (0); 394 } 395 if (tp->t_outq.c_cc && !ISSET(tp->t_state, TS_TTSTOP)) 396 break; 397 } 398 if (!ISSET(tp->t_state, TS_CARR_ON)) 399 return (0); /* EOF */ 400 if (flag & IO_NDELAY) 401 return (EWOULDBLOCK); 402 error = tsleep((caddr_t)&tp->t_outq.c_cf, TTIPRI | PCATCH, 403 ttyin, 0); 404 if (error) 405 return (error); 406 } 407 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 408 error = ureadc(0, uio); 409 while (uio->uio_resid > 0 && error == 0) { 410 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 411 if (cc <= 0) 412 break; 413 error = uiomove(buf, cc, uio); 414 } 415 if (tp->t_outq.c_cc <= tp->t_lowat) { 416 if (ISSET(tp->t_state, TS_ASLEEP)) { 417 CLR(tp->t_state, TS_ASLEEP); 418 wakeup((caddr_t)&tp->t_outq); 419 } 420 selwakeup(&tp->t_wsel); 421 } 422 return (error); 423 } 424 425 426 int 427 ptcwrite(dev, uio, flag) 428 dev_t dev; 429 struct uio *uio; 430 int flag; 431 { 432 struct pt_softc *pti = &pt_softc[minor(dev)]; 433 struct tty *tp = pti->pt_tty; 434 u_char *cp = NULL; 435 int cc = 0; 436 u_char locbuf[BUFSIZ]; 437 int cnt = 0; 438 int error = 0; 439 440 again: 441 if (!ISSET(tp->t_state, TS_ISOPEN)) 442 goto block; 443 if (pti->pt_flags & PF_REMOTE) { 444 if (tp->t_canq.c_cc) 445 goto block; 446 while (uio->uio_resid > 0 && tp->t_canq.c_cc < TTYHOG - 1) { 447 if (cc == 0) { 448 cc = min(uio->uio_resid, BUFSIZ); 449 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 450 cp = locbuf; 451 error = uiomove((caddr_t)cp, cc, uio); 452 if (error) 453 return (error); 454 /* check again for safety */ 455 if (!ISSET(tp->t_state, TS_ISOPEN)) 456 return (EIO); 457 } 458 if (cc) 459 (void) b_to_q((char *)cp, cc, &tp->t_canq); 460 cc = 0; 461 } 462 (void) putc(0, &tp->t_canq); 463 ttwakeup(tp); 464 wakeup((caddr_t)&tp->t_canq); 465 return (0); 466 } 467 while (uio->uio_resid > 0) { 468 if (cc == 0) { 469 cc = min(uio->uio_resid, BUFSIZ); 470 cp = locbuf; 471 error = uiomove((caddr_t)cp, cc, uio); 472 if (error) 473 return (error); 474 /* check again for safety */ 475 if (!ISSET(tp->t_state, TS_ISOPEN)) 476 return (EIO); 477 } 478 while (cc > 0) { 479 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 480 (tp->t_canq.c_cc > 0 || !ISSET(tp->t_iflag, ICANON))) { 481 wakeup((caddr_t)&tp->t_rawq); 482 goto block; 483 } 484 (*linesw[tp->t_line].l_rint)(*cp++, tp); 485 cnt++; 486 cc--; 487 } 488 cc = 0; 489 } 490 return (0); 491 block: 492 /* 493 * Come here to wait for slave to open, for space 494 * in outq, or space in rawq. 495 */ 496 if (!ISSET(tp->t_state, TS_CARR_ON)) 497 return (EIO); 498 if (flag & IO_NDELAY) { 499 /* adjust for data copied in but not written */ 500 uio->uio_resid += cc; 501 if (cnt == 0) 502 return (EWOULDBLOCK); 503 return (0); 504 } 505 error = tsleep((caddr_t)&tp->t_rawq.c_cf, TTOPRI | PCATCH, 506 ttyout, 0); 507 if (error) { 508 /* adjust for data copied in but not written */ 509 uio->uio_resid += cc; 510 return (error); 511 } 512 goto again; 513 } 514 515 int 516 ptcpoll(dev, events, p) 517 dev_t dev; 518 int events; 519 struct proc *p; 520 { 521 struct pt_softc *pti = &pt_softc[minor(dev)]; 522 struct tty *tp = pti->pt_tty; 523 int revents = 0; 524 int s = splsoftclock(); 525 526 if (events & (POLLIN | POLLRDNORM)) 527 if (ISSET(tp->t_state, TS_ISOPEN) && 528 ((tp->t_outq.c_cc > 0 && !ISSET(tp->t_state, TS_TTSTOP)) || 529 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 530 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 531 revents |= events & (POLLIN | POLLRDNORM); 532 533 if (events & (POLLOUT | POLLWRNORM)) 534 if (ISSET(tp->t_state, TS_ISOPEN) && 535 ((pti->pt_flags & PF_REMOTE) ? 536 (tp->t_canq.c_cc == 0) : 537 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG-2) || 538 (tp->t_canq.c_cc == 0 && ISSET(tp->t_iflag, ICANON))))) 539 revents |= events & (POLLOUT | POLLWRNORM); 540 541 if (events & POLLHUP) 542 if (!ISSET(tp->t_state, TS_CARR_ON)) 543 revents |= POLLHUP; 544 545 if (revents == 0) { 546 if (events & (POLLIN | POLLHUP | POLLRDNORM)) 547 selrecord(p, &pti->pt_selr); 548 549 if (events & (POLLOUT | POLLWRNORM)) 550 selrecord(p, &pti->pt_selw); 551 } 552 553 splx(s); 554 return (revents); 555 } 556 557 558 struct tty * 559 ptytty(dev) 560 dev_t dev; 561 { 562 struct pt_softc *pti = &pt_softc[minor(dev)]; 563 struct tty *tp = pti->pt_tty; 564 565 return (tp); 566 } 567 568 /*ARGSUSED*/ 569 int 570 ptyioctl(dev, cmd, data, flag, p) 571 dev_t dev; 572 u_long cmd; 573 caddr_t data; 574 int flag; 575 struct proc *p; 576 { 577 struct pt_softc *pti = &pt_softc[minor(dev)]; 578 struct tty *tp = pti->pt_tty; 579 u_char *cc = tp->t_cc; 580 int stop, error; 581 582 /* 583 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 584 * ttywflush(tp) will hang if there are characters in the outq. 585 */ 586 if (cmd == TIOCEXT) { 587 /* 588 * When the EXTPROC bit is being toggled, we need 589 * to send an TIOCPKT_IOCTL if the packet driver 590 * is turned on. 591 */ 592 if (*(int *)data) { 593 if (pti->pt_flags & PF_PKT) { 594 pti->pt_send |= TIOCPKT_IOCTL; 595 ptcwakeup(tp, FREAD); 596 } 597 SET(tp->t_lflag, EXTPROC); 598 } else { 599 if (ISSET(tp->t_lflag, EXTPROC) && 600 (pti->pt_flags & PF_PKT)) { 601 pti->pt_send |= TIOCPKT_IOCTL; 602 ptcwakeup(tp, FREAD); 603 } 604 CLR(tp->t_lflag, EXTPROC); 605 } 606 return(0); 607 } else 608 if (cdevsw[major(dev)].d_open == ptcopen) 609 switch (cmd) { 610 611 case TIOCGPGRP: 612 #ifdef COMPAT_SUNOS 613 { 614 /* 615 * I'm not sure about SunOS TIOCGPGRP semantics 616 * on PTYs, but it's something like this: 617 */ 618 extern struct emul emul_sunos; 619 if (p->p_emul == &emul_sunos && tp->t_pgrp == 0) 620 return (EIO); 621 *(int *)data = tp->t_pgrp->pg_id; 622 return (0); 623 } 624 #endif 625 /* 626 * We avoid calling ttioctl on the controller since, 627 * in that case, tp must be the controlling terminal. 628 */ 629 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 630 return (0); 631 632 case TIOCPKT: 633 if (*(int *)data) { 634 if (pti->pt_flags & PF_UCNTL) 635 return (EINVAL); 636 pti->pt_flags |= PF_PKT; 637 } else 638 pti->pt_flags &= ~PF_PKT; 639 return (0); 640 641 case TIOCUCNTL: 642 if (*(int *)data) { 643 if (pti->pt_flags & PF_PKT) 644 return (EINVAL); 645 pti->pt_flags |= PF_UCNTL; 646 } else 647 pti->pt_flags &= ~PF_UCNTL; 648 return (0); 649 650 case TIOCREMOTE: 651 if (*(int *)data) 652 pti->pt_flags |= PF_REMOTE; 653 else 654 pti->pt_flags &= ~PF_REMOTE; 655 ttyflush(tp, FREAD|FWRITE); 656 return (0); 657 658 #ifdef COMPAT_OLDTTY 659 case TIOCSETP: 660 case TIOCSETN: 661 #endif 662 case TIOCSETD: 663 case TIOCSETA: 664 case TIOCSETAW: 665 case TIOCSETAF: 666 ndflush(&tp->t_outq, tp->t_outq.c_cc); 667 break; 668 669 case TIOCSIG: 670 if (*(unsigned int *)data >= NSIG) 671 return(EINVAL); 672 if (!ISSET(tp->t_lflag, NOFLSH)) 673 ttyflush(tp, FREAD|FWRITE); 674 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 675 if ((*(unsigned int *)data == SIGINFO) && 676 (!ISSET(tp->t_lflag, NOKERNINFO))) 677 ttyinfo(tp); 678 return(0); 679 } 680 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 681 if (error < 0) 682 error = ttioctl(tp, cmd, data, flag, p); 683 if (error < 0) { 684 if (pti->pt_flags & PF_UCNTL && 685 (cmd & ~0xff) == UIOCCMD(0)) { 686 if (cmd & 0xff) { 687 pti->pt_ucntl = (u_char)cmd; 688 ptcwakeup(tp, FREAD); 689 } 690 return (0); 691 } 692 error = ENOTTY; 693 } 694 /* 695 * If external processing and packet mode send ioctl packet. 696 */ 697 if (ISSET(tp->t_lflag, EXTPROC) && (pti->pt_flags & PF_PKT)) { 698 switch(cmd) { 699 case TIOCSETA: 700 case TIOCSETAW: 701 case TIOCSETAF: 702 #ifdef COMPAT_OLDTTY 703 case TIOCSETP: 704 case TIOCSETN: 705 case TIOCSETC: 706 case TIOCSLTC: 707 case TIOCLBIS: 708 case TIOCLBIC: 709 case TIOCLSET: 710 #endif 711 pti->pt_send |= TIOCPKT_IOCTL; 712 ptcwakeup(tp, FREAD); 713 default: 714 break; 715 } 716 } 717 stop = ISSET(tp->t_iflag, IXON) && CCEQ(cc[VSTOP], CTRL('s')) 718 && CCEQ(cc[VSTART], CTRL('q')); 719 if (pti->pt_flags & PF_NOSTOP) { 720 if (stop) { 721 pti->pt_send &= ~TIOCPKT_NOSTOP; 722 pti->pt_send |= TIOCPKT_DOSTOP; 723 pti->pt_flags &= ~PF_NOSTOP; 724 ptcwakeup(tp, FREAD); 725 } 726 } else { 727 if (!stop) { 728 pti->pt_send &= ~TIOCPKT_DOSTOP; 729 pti->pt_send |= TIOCPKT_NOSTOP; 730 pti->pt_flags |= PF_NOSTOP; 731 ptcwakeup(tp, FREAD); 732 } 733 } 734 return (error); 735 } 736
Indexes created Mon Sep 22 13:09:51 GMT 2025