pty.c revision 24207
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 1.42 1997/03/23 03:36:28 bde Exp $ 35 */ 36 37/* 38 * Pseudo-teletype Driver 39 * (Actually two drivers, requiring two entries in 'cdevsw') 40 */ 41#include "pty.h" /* XXX */ 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 46#include <sys/ioctl_compat.h> 47#endif 48#include <sys/proc.h> 49#include <sys/tty.h> 50#include <sys/conf.h> 51#include <sys/fcntl.h> 52#include <sys/uio.h> 53#include <sys/kernel.h> 54#include <sys/vnode.h> 55#include <sys/signalvar.h> 56 57#ifdef DEVFS 58#include <sys/devfsext.h> 59#endif /*DEVFS*/ 60 61#ifdef notyet 62static void ptyattach __P((int n)); 63#endif 64static void ptsstart __P((struct tty *tp)); 65static void ptcwakeup __P((struct tty *tp, int flag)); 66 67static d_open_t ptsopen; 68static d_close_t ptsclose; 69static d_read_t ptsread; 70static d_write_t ptswrite; 71static d_ioctl_t ptyioctl; 72static d_stop_t ptsstop; 73static d_devtotty_t ptydevtotty; 74static d_open_t ptcopen; 75static d_close_t ptcclose; 76static d_read_t ptcread; 77static d_write_t ptcwrite; 78static d_select_t ptcselect; 79 80#define CDEV_MAJOR_S 5 81#define CDEV_MAJOR_C 6 82static struct cdevsw pts_cdevsw = 83 { ptsopen, ptsclose, ptsread, ptswrite, /*5*/ 84 ptyioctl, ptsstop, nullreset, ptydevtotty,/* ttyp */ 85 ttselect, nommap, NULL, "pts", NULL, -1 }; 86 87static struct cdevsw ptc_cdevsw = 88 { ptcopen, ptcclose, ptcread, ptcwrite, /*6*/ 89 ptyioctl, nullstop, nullreset, ptydevtotty,/* ptyp */ 90 ptcselect, nommap, NULL, "ptc", NULL, -1 }; 91 92 93#if NPTY == 1 94#undef NPTY 95#define NPTY 32 /* crude XXX */ 96#endif 97 98#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 99 100/* 101 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 102 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 103 */ 104static struct tty pt_tty[NPTY]; /* XXX */ 105static struct pt_ioctl { 106 int pt_flags; 107 struct selinfo pt_selr, pt_selw; 108 u_char pt_send; 109 u_char pt_ucntl; 110} pt_ioctl[NPTY]; /* XXX */ 111static int npty = NPTY; /* for pstat -t */ 112 113#define PF_PKT 0x08 /* packet mode */ 114#define PF_STOPPED 0x10 /* user told stopped */ 115#define PF_REMOTE 0x20 /* remote and flow controlled input */ 116#define PF_NOSTOP 0x40 117#define PF_UCNTL 0x80 /* user control mode */ 118 119#ifdef notyet 120/* 121 * Establish n (or default if n is 1) ptys in the system. 122 * 123 * XXX cdevsw & pstat require the array `pty[]' to be an array 124 */ 125static void 126ptyattach(n) 127 int n; 128{ 129 char *mem; 130 register u_long ntb; 131#define DEFAULT_NPTY 32 132 133 /* maybe should allow 0 => none? */ 134 if (n <= 1) 135 n = DEFAULT_NPTY; 136 ntb = n * sizeof(struct tty); 137 mem = malloc(ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl), 138 M_DEVBUF, M_WAITOK); 139 pt_tty = (struct tty *)mem; 140 mem = (char *)ALIGN(mem + ntb); 141 pt_ioctl = (struct pt_ioctl *)mem; 142 npty = n; 143} 144#endif 145 146/*ARGSUSED*/ 147static int 148ptsopen(dev, flag, devtype, p) 149 dev_t dev; 150 int flag, devtype; 151 struct proc *p; 152{ 153 register struct tty *tp; 154 int error; 155 156 if (minor(dev) >= npty) 157 return (ENXIO); 158 tp = &pt_tty[minor(dev)]; 159 if ((tp->t_state & TS_ISOPEN) == 0) { 160 ttychars(tp); /* Set up default chars */ 161 tp->t_iflag = TTYDEF_IFLAG; 162 tp->t_oflag = TTYDEF_OFLAG; 163 tp->t_lflag = TTYDEF_LFLAG; 164 tp->t_cflag = TTYDEF_CFLAG; 165 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 166 ttsetwater(tp); /* would be done in xxparam() */ 167 } else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0) 168 return (EBUSY); 169 if (tp->t_oproc) /* Ctrlr still around. */ 170 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 171 while ((tp->t_state & TS_CARR_ON) == 0) { 172 if (flag&FNONBLOCK) 173 break; 174 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 175 "ptsopn", 0); 176 if (error) 177 return (error); 178 } 179 error = (*linesw[tp->t_line].l_open)(dev, tp); 180 if (error == 0) 181 ptcwakeup(tp, FREAD|FWRITE); 182 return (error); 183} 184 185static int 186ptsclose(dev, flag, mode, p) 187 dev_t dev; 188 int flag, mode; 189 struct proc *p; 190{ 191 register struct tty *tp; 192 int err; 193 194 tp = &pt_tty[minor(dev)]; 195 err = (*linesw[tp->t_line].l_close)(tp, flag); 196 ptsstop(tp, FREAD|FWRITE); 197 (void) ttyclose(tp); 198 return (err); 199} 200 201static int 202ptsread(dev, uio, flag) 203 dev_t dev; 204 struct uio *uio; 205 int flag; 206{ 207 struct proc *p = curproc; 208 register struct tty *tp = &pt_tty[minor(dev)]; 209 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 210 int error = 0; 211 212again: 213 if (pti->pt_flags & PF_REMOTE) { 214 while (isbackground(p, tp)) { 215 if ((p->p_sigignore & sigmask(SIGTTIN)) || 216 (p->p_sigmask & sigmask(SIGTTIN)) || 217 p->p_pgrp->pg_jobc == 0 || 218 p->p_flag & P_PPWAIT) 219 return (EIO); 220 pgsignal(p->p_pgrp, SIGTTIN, 1); 221 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 222 0); 223 if (error) 224 return (error); 225 } 226 if (tp->t_canq.c_cc == 0) { 227 if (flag & IO_NDELAY) 228 return (EWOULDBLOCK); 229 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 230 "ptsin", 0); 231 if (error) 232 return (error); 233 goto again; 234 } 235 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 236 if (ureadc(getc(&tp->t_canq), uio) < 0) { 237 error = EFAULT; 238 break; 239 } 240 if (tp->t_canq.c_cc == 1) 241 (void) getc(&tp->t_canq); 242 if (tp->t_canq.c_cc) 243 return (error); 244 } else 245 if (tp->t_oproc) 246 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 247 ptcwakeup(tp, FWRITE); 248 return (error); 249} 250 251/* 252 * Write to pseudo-tty. 253 * Wakeups of controlling tty will happen 254 * indirectly, when tty driver calls ptsstart. 255 */ 256static int 257ptswrite(dev, uio, flag) 258 dev_t dev; 259 struct uio *uio; 260 int flag; 261{ 262 register struct tty *tp; 263 264 tp = &pt_tty[minor(dev)]; 265 if (tp->t_oproc == 0) 266 return (EIO); 267 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 268} 269 270/* 271 * Start output on pseudo-tty. 272 * Wake up process selecting or sleeping for input from controlling tty. 273 */ 274static void 275ptsstart(tp) 276 struct tty *tp; 277{ 278 register struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 279 280 if (tp->t_state & TS_TTSTOP) 281 return; 282 if (pti->pt_flags & PF_STOPPED) { 283 pti->pt_flags &= ~PF_STOPPED; 284 pti->pt_send = TIOCPKT_START; 285 } 286 ptcwakeup(tp, FREAD); 287} 288 289static void 290ptcwakeup(tp, flag) 291 struct tty *tp; 292 int flag; 293{ 294 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 295 296 if (flag & FREAD) { 297 selwakeup(&pti->pt_selr); 298 wakeup(TSA_PTC_READ(tp)); 299 } 300 if (flag & FWRITE) { 301 selwakeup(&pti->pt_selw); 302 wakeup(TSA_PTC_WRITE(tp)); 303 } 304} 305 306static int 307ptcopen(dev, flag, devtype, p) 308 dev_t dev; 309 int flag, devtype; 310 struct proc *p; 311{ 312 register struct tty *tp; 313 struct pt_ioctl *pti; 314 315 if (minor(dev) >= npty) 316 return (ENXIO); 317 tp = &pt_tty[minor(dev)]; 318 if (tp->t_oproc) 319 return (EIO); 320 tp->t_oproc = ptsstart; 321#ifdef sun4c 322 tp->t_stop = ptsstop; 323#endif 324 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 325 tp->t_lflag &= ~EXTPROC; 326 pti = &pt_ioctl[minor(dev)]; 327 pti->pt_flags = 0; 328 pti->pt_send = 0; 329 pti->pt_ucntl = 0; 330 return (0); 331} 332 333static int 334ptcclose(dev, flags, fmt, p) 335 dev_t dev; 336 int flags; 337 int fmt; 338 struct proc *p; 339{ 340 register struct tty *tp; 341 342 tp = &pt_tty[minor(dev)]; 343 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 344 345 /* 346 * XXX MDMBUF makes no sense for ptys but would inhibit the above 347 * l_modem(). CLOCAL makes sense but isn't supported. Special 348 * l_modem()s that ignore carrier drop make no sense for ptys but 349 * may be in use because other parts of the line discipline make 350 * sense for ptys. Recover by doing everything that a normal 351 * ttymodem() would have done except for sending a SIGHUP. 352 */ 353 if (tp->t_state & TS_ISOPEN) { 354 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 355 tp->t_state |= TS_ZOMBIE; 356 ttyflush(tp, FREAD | FWRITE); 357 } 358 359 tp->t_oproc = 0; /* mark closed */ 360 return (0); 361} 362 363static int 364ptcread(dev, uio, flag) 365 dev_t dev; 366 struct uio *uio; 367 int flag; 368{ 369 register struct tty *tp = &pt_tty[minor(dev)]; 370 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 371 char buf[BUFSIZ]; 372 int error = 0, cc; 373 374 /* 375 * We want to block until the slave 376 * is open, and there's something to read; 377 * but if we lost the slave or we're NBIO, 378 * then return the appropriate error instead. 379 */ 380 for (;;) { 381 if (tp->t_state&TS_ISOPEN) { 382 if (pti->pt_flags&PF_PKT && pti->pt_send) { 383 error = ureadc((int)pti->pt_send, uio); 384 if (error) 385 return (error); 386 if (pti->pt_send & TIOCPKT_IOCTL) { 387 cc = min(uio->uio_resid, 388 sizeof(tp->t_termios)); 389 uiomove((caddr_t)&tp->t_termios, cc, 390 uio); 391 } 392 pti->pt_send = 0; 393 return (0); 394 } 395 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 396 error = ureadc((int)pti->pt_ucntl, uio); 397 if (error) 398 return (error); 399 pti->pt_ucntl = 0; 400 return (0); 401 } 402 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 403 break; 404 } 405 if ((tp->t_state & TS_CONNECTED) == 0) 406 return (0); /* EOF */ 407 if (flag & IO_NDELAY) 408 return (EWOULDBLOCK); 409 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 410 if (error) 411 return (error); 412 } 413 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 414 error = ureadc(0, uio); 415 while (uio->uio_resid > 0 && error == 0) { 416 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 417 if (cc <= 0) 418 break; 419 error = uiomove(buf, cc, uio); 420 } 421 ttwwakeup(tp); 422 return (error); 423} 424 425static void 426ptsstop(tp, flush) 427 register struct tty *tp; 428 int flush; 429{ 430 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 431 int flag; 432 433 /* note: FLUSHREAD and FLUSHWRITE already ok */ 434 if (flush == 0) { 435 flush = TIOCPKT_STOP; 436 pti->pt_flags |= PF_STOPPED; 437 } else 438 pti->pt_flags &= ~PF_STOPPED; 439 pti->pt_send |= flush; 440 /* change of perspective */ 441 flag = 0; 442 if (flush & FREAD) 443 flag |= FWRITE; 444 if (flush & FWRITE) 445 flag |= FREAD; 446 ptcwakeup(tp, flag); 447} 448 449static int 450ptcselect(dev, rw, p) 451 dev_t dev; 452 int rw; 453 struct proc *p; 454{ 455 register struct tty *tp = &pt_tty[minor(dev)]; 456 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 457 int s; 458 459 if ((tp->t_state & TS_CONNECTED) == 0) 460 return (1); 461 switch (rw) { 462 463 case FREAD: 464 /* 465 * Need to block timeouts (ttrstart). 466 */ 467 s = spltty(); 468 if ((tp->t_state&TS_ISOPEN) && 469 tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) { 470 splx(s); 471 return (1); 472 } 473 splx(s); 474 /* FALLTHROUGH */ 475 476 case 0: /* exceptional */ 477 if ((tp->t_state&TS_ISOPEN) && 478 ((pti->pt_flags&PF_PKT && pti->pt_send) || 479 (pti->pt_flags&PF_UCNTL && pti->pt_ucntl))) 480 return (1); 481 selrecord(p, &pti->pt_selr); 482 break; 483 484 485 case FWRITE: 486 if (tp->t_state&TS_ISOPEN) { 487 if (pti->pt_flags & PF_REMOTE) { 488 if (tp->t_canq.c_cc == 0) 489 return (1); 490 } else { 491 if (tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG-2) 492 return (1); 493 if (tp->t_canq.c_cc == 0 && (tp->t_iflag&ICANON)) 494 return (1); 495 } 496 } 497 selrecord(p, &pti->pt_selw); 498 break; 499 500 } 501 return (0); 502} 503 504static int 505ptcwrite(dev, uio, flag) 506 dev_t dev; 507 register struct uio *uio; 508 int flag; 509{ 510 register struct tty *tp = &pt_tty[minor(dev)]; 511 register u_char *cp = 0; 512 register int cc = 0; 513 u_char locbuf[BUFSIZ]; 514 int cnt = 0; 515 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 516 int error = 0; 517 518again: 519 if ((tp->t_state&TS_ISOPEN) == 0) 520 goto block; 521 if (pti->pt_flags & PF_REMOTE) { 522 if (tp->t_canq.c_cc) 523 goto block; 524 while ((uio->uio_resid > 0 || cc > 0) && 525 tp->t_canq.c_cc < TTYHOG - 1) { 526 if (cc == 0) { 527 cc = min(uio->uio_resid, BUFSIZ); 528 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 529 cp = locbuf; 530 error = uiomove((caddr_t)cp, cc, uio); 531 if (error) 532 return (error); 533 /* check again for safety */ 534 if ((tp->t_state & TS_ISOPEN) == 0) { 535 /* adjust as usual */ 536 uio->uio_resid += cc; 537 return (EIO); 538 } 539 } 540 if (cc > 0) { 541 cc = b_to_q((char *)cp, cc, &tp->t_canq); 542 /* 543 * XXX we don't guarantee that the canq size 544 * is >= TTYHOG, so the above b_to_q() may 545 * leave some bytes uncopied. However, space 546 * is guaranteed for the null terminator if 547 * we don't fail here since (TTYHOG - 1) is 548 * not a multiple of CBSIZE. 549 */ 550 if (cc > 0) 551 break; 552 } 553 } 554 /* adjust for data copied in but not written */ 555 uio->uio_resid += cc; 556 (void) putc(0, &tp->t_canq); 557 ttwakeup(tp); 558 wakeup(TSA_PTS_READ(tp)); 559 return (0); 560 } 561 while (uio->uio_resid > 0 || cc > 0) { 562 if (cc == 0) { 563 cc = min(uio->uio_resid, BUFSIZ); 564 cp = locbuf; 565 error = uiomove((caddr_t)cp, cc, uio); 566 if (error) 567 return (error); 568 /* check again for safety */ 569 if ((tp->t_state & TS_ISOPEN) == 0) { 570 /* adjust for data copied in but not written */ 571 uio->uio_resid += cc; 572 return (EIO); 573 } 574 } 575 while (cc > 0) { 576 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 577 (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) { 578 wakeup(TSA_HUP_OR_INPUT(tp)); 579 goto block; 580 } 581 (*linesw[tp->t_line].l_rint)(*cp++, tp); 582 cnt++; 583 cc--; 584 } 585 cc = 0; 586 } 587 return (0); 588block: 589 /* 590 * Come here to wait for slave to open, for space 591 * in outq, or space in rawq, or an empty canq. 592 */ 593 if ((tp->t_state & TS_CONNECTED) == 0) { 594 /* adjust for data copied in but not written */ 595 uio->uio_resid += cc; 596 return (EIO); 597 } 598 if (flag & IO_NDELAY) { 599 /* adjust for data copied in but not written */ 600 uio->uio_resid += cc; 601 if (cnt == 0) 602 return (EWOULDBLOCK); 603 return (0); 604 } 605 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 606 if (error) { 607 /* adjust for data copied in but not written */ 608 uio->uio_resid += cc; 609 return (error); 610 } 611 goto again; 612} 613 614static struct tty * 615ptydevtotty(dev) 616 dev_t dev; 617{ 618 if (minor(dev) >= npty) 619 return (NULL); 620 621 return &pt_tty[minor(dev)]; 622} 623 624/*ARGSUSED*/ 625static int 626ptyioctl(dev, cmd, data, flag, p) 627 dev_t dev; 628 int cmd; 629 caddr_t data; 630 int flag; 631 struct proc *p; 632{ 633 register struct tty *tp = &pt_tty[minor(dev)]; 634 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 635 register u_char *cc = tp->t_cc; 636 int stop, error; 637 638 /* 639 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 640 * ttywflush(tp) will hang if there are characters in the outq. 641 */ 642 if (cmd == TIOCEXT) { 643 /* 644 * When the EXTPROC bit is being toggled, we need 645 * to send an TIOCPKT_IOCTL if the packet driver 646 * is turned on. 647 */ 648 if (*(int *)data) { 649 if (pti->pt_flags & PF_PKT) { 650 pti->pt_send |= TIOCPKT_IOCTL; 651 ptcwakeup(tp, FREAD); 652 } 653 tp->t_lflag |= EXTPROC; 654 } else { 655 if ((tp->t_lflag & EXTPROC) && 656 (pti->pt_flags & PF_PKT)) { 657 pti->pt_send |= TIOCPKT_IOCTL; 658 ptcwakeup(tp, FREAD); 659 } 660 tp->t_lflag &= ~EXTPROC; 661 } 662 return(0); 663 } else 664 if (cdevsw[major(dev)]->d_open == ptcopen) 665 switch (cmd) { 666 667 case TIOCGPGRP: 668 /* 669 * We aviod calling ttioctl on the controller since, 670 * in that case, tp must be the controlling terminal. 671 */ 672 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 673 return (0); 674 675 case TIOCPKT: 676 if (*(int *)data) { 677 if (pti->pt_flags & PF_UCNTL) 678 return (EINVAL); 679 pti->pt_flags |= PF_PKT; 680 } else 681 pti->pt_flags &= ~PF_PKT; 682 return (0); 683 684 case TIOCUCNTL: 685 if (*(int *)data) { 686 if (pti->pt_flags & PF_PKT) 687 return (EINVAL); 688 pti->pt_flags |= PF_UCNTL; 689 } else 690 pti->pt_flags &= ~PF_UCNTL; 691 return (0); 692 693 case TIOCREMOTE: 694 if (*(int *)data) 695 pti->pt_flags |= PF_REMOTE; 696 else 697 pti->pt_flags &= ~PF_REMOTE; 698 ttyflush(tp, FREAD|FWRITE); 699 return (0); 700 701#ifdef COMPAT_43 702 case TIOCSETP: 703 case TIOCSETN: 704#endif 705 case TIOCSETD: 706 case TIOCSETA: 707 case TIOCSETAW: 708 case TIOCSETAF: 709 ndflush(&tp->t_outq, tp->t_outq.c_cc); 710 break; 711 712 case TIOCSIG: 713 if (*(unsigned int *)data >= NSIG) 714 return(EINVAL); 715 if ((tp->t_lflag&NOFLSH) == 0) 716 ttyflush(tp, FREAD|FWRITE); 717 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 718 if ((*(unsigned int *)data == SIGINFO) && 719 ((tp->t_lflag&NOKERNINFO) == 0)) 720 ttyinfo(tp); 721 return(0); 722 } 723 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 724 if (error < 0) 725 error = ttioctl(tp, cmd, data, flag); 726 if (error < 0) { 727 if (pti->pt_flags & PF_UCNTL && 728 (cmd & ~0xff) == UIOCCMD(0)) { 729 if (cmd & 0xff) { 730 pti->pt_ucntl = (u_char)cmd; 731 ptcwakeup(tp, FREAD); 732 } 733 return (0); 734 } 735 error = ENOTTY; 736 } 737 /* 738 * If external processing and packet mode send ioctl packet. 739 */ 740 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 741 switch(cmd) { 742 case TIOCSETA: 743 case TIOCSETAW: 744 case TIOCSETAF: 745#ifdef COMPAT_43 746 case TIOCSETP: 747 case TIOCSETN: 748#endif 749#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 750 case TIOCSETC: 751 case TIOCSLTC: 752 case TIOCLBIS: 753 case TIOCLBIC: 754 case TIOCLSET: 755#endif 756 pti->pt_send |= TIOCPKT_IOCTL; 757 ptcwakeup(tp, FREAD); 758 default: 759 break; 760 } 761 } 762 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 763 && CCEQ(cc[VSTART], CTRL('q')); 764 if (pti->pt_flags & PF_NOSTOP) { 765 if (stop) { 766 pti->pt_send &= ~TIOCPKT_NOSTOP; 767 pti->pt_send |= TIOCPKT_DOSTOP; 768 pti->pt_flags &= ~PF_NOSTOP; 769 ptcwakeup(tp, FREAD); 770 } 771 } else { 772 if (!stop) { 773 pti->pt_send &= ~TIOCPKT_DOSTOP; 774 pti->pt_send |= TIOCPKT_NOSTOP; 775 pti->pt_flags |= PF_NOSTOP; 776 ptcwakeup(tp, FREAD); 777 } 778 } 779 return (error); 780} 781 782static ptc_devsw_installed = 0; 783#ifdef DEVFS 784#define MAXUNITS (8 * 32) 785static void *devfs_token_pts[MAXUNITS]; 786static void *devfs_token_ptc[MAXUNITS]; 787static const char jnames[] = "pqrsPQRS"; 788#endif 789 790static void 791ptc_drvinit(void *unused) 792{ 793#ifdef DEVFS 794 int i,j,k; 795#endif 796 dev_t dev; 797 798 if( ! ptc_devsw_installed ) { 799 dev = makedev(CDEV_MAJOR_S, 0); 800 cdevsw_add(&dev, &pts_cdevsw, NULL); 801 dev = makedev(CDEV_MAJOR_C, 0); 802 cdevsw_add(&dev, &ptc_cdevsw, NULL); 803 ptc_devsw_installed = 1; 804#ifdef DEVFS 805/*XXX*/ 806#if NPTY > MAXUNITS 807#undef NPTY 808#define NPTY MAXUNITS 809#endif 810 for ( i = 0 ; i<NPTY ; i++ ) { 811 j = i / 32; 812 k = i % 32; 813 devfs_token_pts[i] = 814 devfs_add_devswf(&pts_cdevsw,i, 815 DV_CHR,0,0,0666, 816 "tty%c%n",jnames[j],k); 817 devfs_token_ptc[i] = 818 devfs_add_devswf(&ptc_cdevsw,i, 819 DV_CHR,0,0,0666, 820 "pty%c%n",jnames[j],k); 821 } 822#endif 823 } 824} 825 826SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL) 827