pty.c revision 47625
1/* 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. 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 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95 34 * $Id: tty_pty.c,v 1.59 1999/05/18 14:53:52 luoqi Exp $ 35 */ 36 37/* 38 * Pseudo-teletype Driver 39 * (Actually two drivers, requiring two entries in 'cdevsw') 40 */ 41#include "pty.h" /* XXX */ 42#include "opt_compat.h" 43#include "opt_devfs.h" 44 45#include <sys/param.h> 46#include <sys/systm.h> 47#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 48#include <sys/ioctl_compat.h> 49#endif 50#include <sys/proc.h> 51#include <sys/tty.h> 52#include <sys/conf.h> 53#include <sys/fcntl.h> 54#include <sys/poll.h> 55#include <sys/kernel.h> 56#include <sys/vnode.h> 57#include <sys/signalvar.h> 58 59#ifdef DEVFS 60#include <sys/devfsext.h> 61#endif /*DEVFS*/ 62 63#ifdef notyet 64static void ptyattach __P((int n)); 65#endif 66static void ptsstart __P((struct tty *tp)); 67static void ptcwakeup __P((struct tty *tp, int flag)); 68 69static d_open_t ptsopen; 70static d_close_t ptsclose; 71static d_read_t ptsread; 72static d_write_t ptswrite; 73static d_ioctl_t ptyioctl; 74static d_stop_t ptsstop; 75static d_devtotty_t ptydevtotty; 76static d_open_t ptcopen; 77static d_close_t ptcclose; 78static d_read_t ptcread; 79static d_write_t ptcwrite; 80static d_poll_t ptcpoll; 81 82#define CDEV_MAJOR_S 5 83static struct cdevsw pts_cdevsw = { 84 /* open */ ptsopen, 85 /* close */ ptsclose, 86 /* read */ ptsread, 87 /* write */ ptswrite, 88 /* ioctl */ ptyioctl, 89 /* stop */ ptsstop, 90 /* reset */ noreset, 91 /* devtotty */ ptydevtotty, 92 /* poll */ ttpoll, 93 /* mmap */ nommap, 94 /* strategy */ nostrategy, 95 /* name */ "pts", 96 /* parms */ noparms, 97 /* maj */ CDEV_MAJOR_S, 98 /* dump */ nodump, 99 /* psize */ nopsize, 100 /* flags */ D_TTY, 101 /* maxio */ 0, 102 /* bmaj */ -1 103}; 104 105#define CDEV_MAJOR_C 6 106static struct cdevsw ptc_cdevsw = { 107 /* open */ ptcopen, 108 /* close */ ptcclose, 109 /* read */ ptcread, 110 /* write */ ptcwrite, 111 /* ioctl */ ptyioctl, 112 /* stop */ nostop, 113 /* reset */ noreset, 114 /* devtotty */ ptydevtotty, 115 /* poll */ ptcpoll, 116 /* mmap */ nommap, 117 /* strategy */ nostrategy, 118 /* name */ "ptc", 119 /* parms */ noparms, 120 /* maj */ CDEV_MAJOR_C, 121 /* dump */ nodump, 122 /* psize */ nopsize, 123 /* flags */ D_TTY, 124 /* maxio */ 0, 125 /* bmaj */ -1 126}; 127 128#if NPTY == 1 129#undef NPTY 130#define NPTY 32 /* crude XXX */ 131#warning You have only one pty defined, redefining to 32. 132#endif 133 134#ifdef DEVFS 135#define MAXUNITS (8 * 32) 136static void *devfs_token_pts[MAXUNITS]; 137static void *devfs_token_ptc[MAXUNITS]; 138static const char jnames[] = "pqrsPQRS"; 139#if NPTY > MAXUNITS 140#undef NPTY 141#define NPTY MAXUNITS 142#warning Can't have more than 256 pty's with DEVFS defined. 143#endif 144#endif 145 146#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 147 148/* 149 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 150 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 151 */ 152static struct tty pt_tty[NPTY]; /* XXX */ 153static struct pt_ioctl { 154 int pt_flags; 155 struct selinfo pt_selr, pt_selw; 156 u_char pt_send; 157 u_char pt_ucntl; 158} pt_ioctl[NPTY]; /* XXX */ 159static int npty = NPTY; /* for pstat -t */ 160 161#define PF_PKT 0x08 /* packet mode */ 162#define PF_STOPPED 0x10 /* user told stopped */ 163#define PF_REMOTE 0x20 /* remote and flow controlled input */ 164#define PF_NOSTOP 0x40 165#define PF_UCNTL 0x80 /* user control mode */ 166 167#ifdef notyet 168/* 169 * Establish n (or default if n is 1) ptys in the system. 170 * 171 * XXX cdevsw & pstat require the array `pty[]' to be an array 172 */ 173static void 174ptyattach(n) 175 int n; 176{ 177 char *mem; 178 register u_long ntb; 179#define DEFAULT_NPTY 32 180 181 /* maybe should allow 0 => none? */ 182 if (n <= 1) 183 n = DEFAULT_NPTY; 184 ntb = n * sizeof(struct tty); 185 mem = malloc(ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl), 186 M_DEVBUF, M_WAITOK); 187 pt_tty = (struct tty *)mem; 188 mem = (char *)ALIGN(mem + ntb); 189 pt_ioctl = (struct pt_ioctl *)mem; 190 npty = n; 191} 192#endif 193 194/*ARGSUSED*/ 195static int 196ptsopen(dev, flag, devtype, p) 197 dev_t dev; 198 int flag, devtype; 199 struct proc *p; 200{ 201 register struct tty *tp; 202 int error; 203 204 if (minor(dev) >= npty) 205 return (ENXIO); 206 tp = &pt_tty[minor(dev)]; 207 if ((tp->t_state & TS_ISOPEN) == 0) { 208 ttychars(tp); /* Set up default chars */ 209 tp->t_iflag = TTYDEF_IFLAG; 210 tp->t_oflag = TTYDEF_OFLAG; 211 tp->t_lflag = TTYDEF_LFLAG; 212 tp->t_cflag = TTYDEF_CFLAG; 213 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 214 } else if (tp->t_state & TS_XCLUDE && suser(p)) 215 return (EBUSY); 216 if (tp->t_oproc) /* Ctrlr still around. */ 217 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 218 while ((tp->t_state & TS_CARR_ON) == 0) { 219 if (flag&FNONBLOCK) 220 break; 221 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 222 "ptsopn", 0); 223 if (error) 224 return (error); 225 } 226 error = (*linesw[tp->t_line].l_open)(dev, tp); 227 if (error == 0) 228 ptcwakeup(tp, FREAD|FWRITE); 229 return (error); 230} 231 232static int 233ptsclose(dev, flag, mode, p) 234 dev_t dev; 235 int flag, mode; 236 struct proc *p; 237{ 238 register struct tty *tp; 239 int err; 240 241 tp = &pt_tty[minor(dev)]; 242 err = (*linesw[tp->t_line].l_close)(tp, flag); 243 ptsstop(tp, FREAD|FWRITE); 244 (void) ttyclose(tp); 245 return (err); 246} 247 248static int 249ptsread(dev, uio, flag) 250 dev_t dev; 251 struct uio *uio; 252 int flag; 253{ 254 struct proc *p = curproc; 255 register struct tty *tp = &pt_tty[minor(dev)]; 256 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 257 int error = 0; 258 259again: 260 if (pti->pt_flags & PF_REMOTE) { 261 while (isbackground(p, tp)) { 262 if ((p->p_sigignore & sigmask(SIGTTIN)) || 263 (p->p_sigmask & sigmask(SIGTTIN)) || 264 p->p_pgrp->pg_jobc == 0 || 265 p->p_flag & P_PPWAIT) 266 return (EIO); 267 pgsignal(p->p_pgrp, SIGTTIN, 1); 268 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 269 0); 270 if (error) 271 return (error); 272 } 273 if (tp->t_canq.c_cc == 0) { 274 if (flag & IO_NDELAY) 275 return (EWOULDBLOCK); 276 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 277 "ptsin", 0); 278 if (error) 279 return (error); 280 goto again; 281 } 282 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 283 if (ureadc(getc(&tp->t_canq), uio) < 0) { 284 error = EFAULT; 285 break; 286 } 287 if (tp->t_canq.c_cc == 1) 288 (void) getc(&tp->t_canq); 289 if (tp->t_canq.c_cc) 290 return (error); 291 } else 292 if (tp->t_oproc) 293 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 294 ptcwakeup(tp, FWRITE); 295 return (error); 296} 297 298/* 299 * Write to pseudo-tty. 300 * Wakeups of controlling tty will happen 301 * indirectly, when tty driver calls ptsstart. 302 */ 303static int 304ptswrite(dev, uio, flag) 305 dev_t dev; 306 struct uio *uio; 307 int flag; 308{ 309 register struct tty *tp; 310 311 tp = &pt_tty[minor(dev)]; 312 if (tp->t_oproc == 0) 313 return (EIO); 314 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 315} 316 317/* 318 * Start output on pseudo-tty. 319 * Wake up process selecting or sleeping for input from controlling tty. 320 */ 321static void 322ptsstart(tp) 323 struct tty *tp; 324{ 325 register struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 326 327 if (tp->t_state & TS_TTSTOP) 328 return; 329 if (pti->pt_flags & PF_STOPPED) { 330 pti->pt_flags &= ~PF_STOPPED; 331 pti->pt_send = TIOCPKT_START; 332 } 333 ptcwakeup(tp, FREAD); 334} 335 336static void 337ptcwakeup(tp, flag) 338 struct tty *tp; 339 int flag; 340{ 341 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 342 343 if (flag & FREAD) { 344 selwakeup(&pti->pt_selr); 345 wakeup(TSA_PTC_READ(tp)); 346 } 347 if (flag & FWRITE) { 348 selwakeup(&pti->pt_selw); 349 wakeup(TSA_PTC_WRITE(tp)); 350 } 351} 352 353static int 354ptcopen(dev, flag, devtype, p) 355 dev_t dev; 356 int flag, devtype; 357 struct proc *p; 358{ 359 register struct tty *tp; 360 struct pt_ioctl *pti; 361 362 if (minor(dev) >= npty) 363 return (ENXIO); 364 tp = &pt_tty[minor(dev)]; 365 if (tp->t_oproc) 366 return (EIO); 367 tp->t_oproc = ptsstart; 368#ifdef sun4c 369 tp->t_stop = ptsstop; 370#endif 371 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 372 tp->t_lflag &= ~EXTPROC; 373 pti = &pt_ioctl[minor(dev)]; 374 pti->pt_flags = 0; 375 pti->pt_send = 0; 376 pti->pt_ucntl = 0; 377 return (0); 378} 379 380static int 381ptcclose(dev, flags, fmt, p) 382 dev_t dev; 383 int flags; 384 int fmt; 385 struct proc *p; 386{ 387 register struct tty *tp; 388 389 tp = &pt_tty[minor(dev)]; 390 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 391 392 /* 393 * XXX MDMBUF makes no sense for ptys but would inhibit the above 394 * l_modem(). CLOCAL makes sense but isn't supported. Special 395 * l_modem()s that ignore carrier drop make no sense for ptys but 396 * may be in use because other parts of the line discipline make 397 * sense for ptys. Recover by doing everything that a normal 398 * ttymodem() would have done except for sending a SIGHUP. 399 */ 400 if (tp->t_state & TS_ISOPEN) { 401 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 402 tp->t_state |= TS_ZOMBIE; 403 ttyflush(tp, FREAD | FWRITE); 404 } 405 406 tp->t_oproc = 0; /* mark closed */ 407 return (0); 408} 409 410static int 411ptcread(dev, uio, flag) 412 dev_t dev; 413 struct uio *uio; 414 int flag; 415{ 416 register struct tty *tp = &pt_tty[minor(dev)]; 417 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 418 char buf[BUFSIZ]; 419 int error = 0, cc; 420 421 /* 422 * We want to block until the slave 423 * is open, and there's something to read; 424 * but if we lost the slave or we're NBIO, 425 * then return the appropriate error instead. 426 */ 427 for (;;) { 428 if (tp->t_state&TS_ISOPEN) { 429 if (pti->pt_flags&PF_PKT && pti->pt_send) { 430 error = ureadc((int)pti->pt_send, uio); 431 if (error) 432 return (error); 433 if (pti->pt_send & TIOCPKT_IOCTL) { 434 cc = min(uio->uio_resid, 435 sizeof(tp->t_termios)); 436 uiomove((caddr_t)&tp->t_termios, cc, 437 uio); 438 } 439 pti->pt_send = 0; 440 return (0); 441 } 442 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 443 error = ureadc((int)pti->pt_ucntl, uio); 444 if (error) 445 return (error); 446 pti->pt_ucntl = 0; 447 return (0); 448 } 449 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 450 break; 451 } 452 if ((tp->t_state & TS_CONNECTED) == 0) 453 return (0); /* EOF */ 454 if (flag & IO_NDELAY) 455 return (EWOULDBLOCK); 456 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 457 if (error) 458 return (error); 459 } 460 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 461 error = ureadc(0, uio); 462 while (uio->uio_resid > 0 && error == 0) { 463 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 464 if (cc <= 0) 465 break; 466 error = uiomove(buf, cc, uio); 467 } 468 ttwwakeup(tp); 469 return (error); 470} 471 472static void 473ptsstop(tp, flush) 474 register struct tty *tp; 475 int flush; 476{ 477 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 478 int flag; 479 480 /* note: FLUSHREAD and FLUSHWRITE already ok */ 481 if (flush == 0) { 482 flush = TIOCPKT_STOP; 483 pti->pt_flags |= PF_STOPPED; 484 } else 485 pti->pt_flags &= ~PF_STOPPED; 486 pti->pt_send |= flush; 487 /* change of perspective */ 488 flag = 0; 489 if (flush & FREAD) 490 flag |= FWRITE; 491 if (flush & FWRITE) 492 flag |= FREAD; 493 ptcwakeup(tp, flag); 494} 495 496static int 497ptcpoll(dev, events, p) 498 dev_t dev; 499 int events; 500 struct proc *p; 501{ 502 register struct tty *tp = &pt_tty[minor(dev)]; 503 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 504 int revents = 0; 505 int s; 506 507 if ((tp->t_state & TS_CONNECTED) == 0) 508 return (seltrue(dev, events, p) | POLLHUP); 509 510 /* 511 * Need to block timeouts (ttrstart). 512 */ 513 s = spltty(); 514 515 if (events & (POLLIN | POLLRDNORM)) 516 if ((tp->t_state & TS_ISOPEN) && 517 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 518 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 519 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 520 revents |= events & (POLLIN | POLLRDNORM); 521 522 if (events & (POLLOUT | POLLWRNORM)) 523 if (tp->t_state & TS_ISOPEN && 524 ((pti->pt_flags & PF_REMOTE) ? 525 (tp->t_canq.c_cc == 0) : 526 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 527 (tp->t_canq.c_cc == 0 && (tp->t_iflag & ICANON))))) 528 revents |= events & (POLLOUT | POLLWRNORM); 529 530 if (events & POLLHUP) 531 if ((tp->t_state & TS_CARR_ON) == 0) 532 revents |= POLLHUP; 533 534 if (revents == 0) { 535 if (events & (POLLIN | POLLRDNORM)) 536 selrecord(p, &pti->pt_selr); 537 538 if (events & (POLLOUT | POLLWRNORM)) 539 selrecord(p, &pti->pt_selw); 540 } 541 splx(s); 542 543 return (revents); 544} 545 546static int 547ptcwrite(dev, uio, flag) 548 dev_t dev; 549 register struct uio *uio; 550 int flag; 551{ 552 register struct tty *tp = &pt_tty[minor(dev)]; 553 register u_char *cp = 0; 554 register int cc = 0; 555 u_char locbuf[BUFSIZ]; 556 int cnt = 0; 557 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 558 int error = 0; 559 560again: 561 if ((tp->t_state&TS_ISOPEN) == 0) 562 goto block; 563 if (pti->pt_flags & PF_REMOTE) { 564 if (tp->t_canq.c_cc) 565 goto block; 566 while ((uio->uio_resid > 0 || cc > 0) && 567 tp->t_canq.c_cc < TTYHOG - 1) { 568 if (cc == 0) { 569 cc = min(uio->uio_resid, BUFSIZ); 570 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 571 cp = locbuf; 572 error = uiomove((caddr_t)cp, cc, uio); 573 if (error) 574 return (error); 575 /* check again for safety */ 576 if ((tp->t_state & TS_ISOPEN) == 0) { 577 /* adjust as usual */ 578 uio->uio_resid += cc; 579 return (EIO); 580 } 581 } 582 if (cc > 0) { 583 cc = b_to_q((char *)cp, cc, &tp->t_canq); 584 /* 585 * XXX we don't guarantee that the canq size 586 * is >= TTYHOG, so the above b_to_q() may 587 * leave some bytes uncopied. However, space 588 * is guaranteed for the null terminator if 589 * we don't fail here since (TTYHOG - 1) is 590 * not a multiple of CBSIZE. 591 */ 592 if (cc > 0) 593 break; 594 } 595 } 596 /* adjust for data copied in but not written */ 597 uio->uio_resid += cc; 598 (void) putc(0, &tp->t_canq); 599 ttwakeup(tp); 600 wakeup(TSA_PTS_READ(tp)); 601 return (0); 602 } 603 while (uio->uio_resid > 0 || cc > 0) { 604 if (cc == 0) { 605 cc = min(uio->uio_resid, BUFSIZ); 606 cp = locbuf; 607 error = uiomove((caddr_t)cp, cc, uio); 608 if (error) 609 return (error); 610 /* check again for safety */ 611 if ((tp->t_state & TS_ISOPEN) == 0) { 612 /* adjust for data copied in but not written */ 613 uio->uio_resid += cc; 614 return (EIO); 615 } 616 } 617 while (cc > 0) { 618 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 619 (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) { 620 wakeup(TSA_HUP_OR_INPUT(tp)); 621 goto block; 622 } 623 (*linesw[tp->t_line].l_rint)(*cp++, tp); 624 cnt++; 625 cc--; 626 } 627 cc = 0; 628 } 629 return (0); 630block: 631 /* 632 * Come here to wait for slave to open, for space 633 * in outq, or space in rawq, or an empty canq. 634 */ 635 if ((tp->t_state & TS_CONNECTED) == 0) { 636 /* adjust for data copied in but not written */ 637 uio->uio_resid += cc; 638 return (EIO); 639 } 640 if (flag & IO_NDELAY) { 641 /* adjust for data copied in but not written */ 642 uio->uio_resid += cc; 643 if (cnt == 0) 644 return (EWOULDBLOCK); 645 return (0); 646 } 647 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 648 if (error) { 649 /* adjust for data copied in but not written */ 650 uio->uio_resid += cc; 651 return (error); 652 } 653 goto again; 654} 655 656static struct tty * 657ptydevtotty(dev) 658 dev_t dev; 659{ 660 if (minor(dev) >= npty) 661 return (NULL); 662 663 return &pt_tty[minor(dev)]; 664} 665 666/*ARGSUSED*/ 667static int 668ptyioctl(dev, cmd, data, flag, p) 669 dev_t dev; 670 u_long cmd; 671 caddr_t data; 672 int flag; 673 struct proc *p; 674{ 675 register struct tty *tp = &pt_tty[minor(dev)]; 676 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 677 register u_char *cc = tp->t_cc; 678 int stop, error; 679 680 if (devsw(dev)->d_open == ptcopen) { 681 switch (cmd) { 682 683 case TIOCGPGRP: 684 /* 685 * We avoid calling ttioctl on the controller since, 686 * in that case, tp must be the controlling terminal. 687 */ 688 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 689 return (0); 690 691 case TIOCPKT: 692 if (*(int *)data) { 693 if (pti->pt_flags & PF_UCNTL) 694 return (EINVAL); 695 pti->pt_flags |= PF_PKT; 696 } else 697 pti->pt_flags &= ~PF_PKT; 698 return (0); 699 700 case TIOCUCNTL: 701 if (*(int *)data) { 702 if (pti->pt_flags & PF_PKT) 703 return (EINVAL); 704 pti->pt_flags |= PF_UCNTL; 705 } else 706 pti->pt_flags &= ~PF_UCNTL; 707 return (0); 708 709 case TIOCREMOTE: 710 if (*(int *)data) 711 pti->pt_flags |= PF_REMOTE; 712 else 713 pti->pt_flags &= ~PF_REMOTE; 714 ttyflush(tp, FREAD|FWRITE); 715 return (0); 716 } 717 718 /* 719 * The rest of the ioctls shouldn't be called until 720 * the slave is open. 721 */ 722 if ((tp->t_state & TS_ISOPEN) == 0) 723 return (EAGAIN); 724 725 switch (cmd) { 726#ifdef COMPAT_43 727 case TIOCSETP: 728 case TIOCSETN: 729#endif 730 case TIOCSETD: 731 case TIOCSETA: 732 case TIOCSETAW: 733 case TIOCSETAF: 734 /* 735 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 736 * ttywflush(tp) will hang if there are characters in 737 * the outq. 738 */ 739 ndflush(&tp->t_outq, tp->t_outq.c_cc); 740 break; 741 742 case TIOCSIG: 743 if (*(unsigned int *)data >= NSIG || 744 *(unsigned int *)data == 0) 745 return(EINVAL); 746 if ((tp->t_lflag&NOFLSH) == 0) 747 ttyflush(tp, FREAD|FWRITE); 748 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 749 if ((*(unsigned int *)data == SIGINFO) && 750 ((tp->t_lflag&NOKERNINFO) == 0)) 751 ttyinfo(tp); 752 return(0); 753 } 754 } 755 if (cmd == TIOCEXT) { 756 /* 757 * When the EXTPROC bit is being toggled, we need 758 * to send an TIOCPKT_IOCTL if the packet driver 759 * is turned on. 760 */ 761 if (*(int *)data) { 762 if (pti->pt_flags & PF_PKT) { 763 pti->pt_send |= TIOCPKT_IOCTL; 764 ptcwakeup(tp, FREAD); 765 } 766 tp->t_lflag |= EXTPROC; 767 } else { 768 if ((tp->t_lflag & EXTPROC) && 769 (pti->pt_flags & PF_PKT)) { 770 pti->pt_send |= TIOCPKT_IOCTL; 771 ptcwakeup(tp, FREAD); 772 } 773 tp->t_lflag &= ~EXTPROC; 774 } 775 return(0); 776 } 777 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 778 if (error == ENOIOCTL) 779 error = ttioctl(tp, cmd, data, flag); 780 if (error == ENOIOCTL) { 781 if (pti->pt_flags & PF_UCNTL && 782 (cmd & ~0xff) == UIOCCMD(0)) { 783 if (cmd & 0xff) { 784 pti->pt_ucntl = (u_char)cmd; 785 ptcwakeup(tp, FREAD); 786 } 787 return (0); 788 } 789 error = ENOTTY; 790 } 791 /* 792 * If external processing and packet mode send ioctl packet. 793 */ 794 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 795 switch(cmd) { 796 case TIOCSETA: 797 case TIOCSETAW: 798 case TIOCSETAF: 799#ifdef COMPAT_43 800 case TIOCSETP: 801 case TIOCSETN: 802#endif 803#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 804 case TIOCSETC: 805 case TIOCSLTC: 806 case TIOCLBIS: 807 case TIOCLBIC: 808 case TIOCLSET: 809#endif 810 pti->pt_send |= TIOCPKT_IOCTL; 811 ptcwakeup(tp, FREAD); 812 default: 813 break; 814 } 815 } 816 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 817 && CCEQ(cc[VSTART], CTRL('q')); 818 if (pti->pt_flags & PF_NOSTOP) { 819 if (stop) { 820 pti->pt_send &= ~TIOCPKT_NOSTOP; 821 pti->pt_send |= TIOCPKT_DOSTOP; 822 pti->pt_flags &= ~PF_NOSTOP; 823 ptcwakeup(tp, FREAD); 824 } 825 } else { 826 if (!stop) { 827 pti->pt_send &= ~TIOCPKT_DOSTOP; 828 pti->pt_send |= TIOCPKT_NOSTOP; 829 pti->pt_flags |= PF_NOSTOP; 830 ptcwakeup(tp, FREAD); 831 } 832 } 833 return (error); 834} 835 836static int ptc_devsw_installed; 837 838static void ptc_drvinit __P((void *unused)); 839static void 840ptc_drvinit(unused) 841 void *unused; 842{ 843#ifdef DEVFS 844 int i,j,k; 845#endif 846 dev_t dev; 847 848 if( ! ptc_devsw_installed ) { 849 dev = makedev(CDEV_MAJOR_S, 0); 850 cdevsw_add(&dev, &pts_cdevsw, NULL); 851 dev = makedev(CDEV_MAJOR_C, 0); 852 cdevsw_add(&dev, &ptc_cdevsw, NULL); 853 ptc_devsw_installed = 1; 854#ifdef DEVFS 855 for ( i = 0 ; i<NPTY ; i++ ) { 856 j = i / 32; 857 k = i % 32; 858 devfs_token_pts[i] = 859 devfs_add_devswf(&pts_cdevsw,i, 860 DV_CHR,0,0,0666, 861 "tty%c%r",jnames[j],k); 862 devfs_token_ptc[i] = 863 devfs_add_devswf(&ptc_cdevsw,i, 864 DV_CHR,0,0,0666, 865 "pty%c%r",jnames[j],k); 866 } 867#endif 868 } 869} 870 871SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL) 872