pty.c revision 31778
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 1.48 1997/12/06 13:24:10 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#include "opt_compat.h" 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 47#include <sys/ioctl_compat.h> 48#endif 49#include <sys/proc.h> 50#include <sys/tty.h> 51#include <sys/conf.h> 52#include <sys/fcntl.h> 53#include <sys/poll.h> 54#include <sys/kernel.h> 55#include <sys/vnode.h> 56#include <sys/signalvar.h> 57 58#ifdef DEVFS 59#include <sys/devfsext.h> 60#endif /*DEVFS*/ 61 62#ifdef notyet 63static void ptyattach __P((int n)); 64#endif 65static void ptsstart __P((struct tty *tp)); 66static void ptcwakeup __P((struct tty *tp, int flag)); 67 68static d_open_t ptsopen; 69static d_close_t ptsclose; 70static d_read_t ptsread; 71static d_write_t ptswrite; 72static d_ioctl_t ptyioctl; 73static d_stop_t ptsstop; 74static d_devtotty_t ptydevtotty; 75static d_open_t ptcopen; 76static d_close_t ptcclose; 77static d_read_t ptcread; 78static d_write_t ptcwrite; 79static d_poll_t ptcpoll; 80 81#define CDEV_MAJOR_S 5 82#define CDEV_MAJOR_C 6 83static struct cdevsw pts_cdevsw = 84 { ptsopen, ptsclose, ptsread, ptswrite, /*5*/ 85 ptyioctl, ptsstop, nullreset, ptydevtotty,/* ttyp */ 86 ttpoll, nommap, NULL, "pts", NULL, -1 }; 87 88static struct cdevsw ptc_cdevsw = 89 { ptcopen, ptcclose, ptcread, ptcwrite, /*6*/ 90 ptyioctl, nullstop, nullreset, ptydevtotty,/* ptyp */ 91 ptcpoll, nommap, NULL, "ptc", NULL, -1 }; 92 93 94#if NPTY == 1 95#undef NPTY 96#define NPTY 32 /* crude XXX */ 97#warning You have only one pty defined, redefining to 32. 98#endif 99 100#ifdef DEVFS 101#define MAXUNITS (8 * 32) 102static void *devfs_token_pts[MAXUNITS]; 103static void *devfs_token_ptc[MAXUNITS]; 104static const char jnames[] = "pqrsPQRS"; 105#if NPTY > MAXUNITS 106#undef NPTY 107#define NPTY MAXUNITS 108#warning Can't have more than 256 pty's with DEVFS defined. 109#endif 110#endif 111 112#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 113 114/* 115 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 116 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 117 */ 118static struct tty pt_tty[NPTY]; /* XXX */ 119static struct pt_ioctl { 120 int pt_flags; 121 struct selinfo pt_selr, pt_selw; 122 u_char pt_send; 123 u_char pt_ucntl; 124} pt_ioctl[NPTY]; /* XXX */ 125static int npty = NPTY; /* for pstat -t */ 126 127#define PF_PKT 0x08 /* packet mode */ 128#define PF_STOPPED 0x10 /* user told stopped */ 129#define PF_REMOTE 0x20 /* remote and flow controlled input */ 130#define PF_NOSTOP 0x40 131#define PF_UCNTL 0x80 /* user control mode */ 132 133#ifdef notyet 134/* 135 * Establish n (or default if n is 1) ptys in the system. 136 * 137 * XXX cdevsw & pstat require the array `pty[]' to be an array 138 */ 139static void 140ptyattach(n) 141 int n; 142{ 143 char *mem; 144 register u_long ntb; 145#define DEFAULT_NPTY 32 146 147 /* maybe should allow 0 => none? */ 148 if (n <= 1) 149 n = DEFAULT_NPTY; 150 ntb = n * sizeof(struct tty); 151 mem = malloc(ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl), 152 M_DEVBUF, M_WAITOK); 153 pt_tty = (struct tty *)mem; 154 mem = (char *)ALIGN(mem + ntb); 155 pt_ioctl = (struct pt_ioctl *)mem; 156 npty = n; 157} 158#endif 159 160/*ARGSUSED*/ 161static int 162ptsopen(dev, flag, devtype, p) 163 dev_t dev; 164 int flag, devtype; 165 struct proc *p; 166{ 167 register struct tty *tp; 168 int error; 169 170 if (minor(dev) >= npty) 171 return (ENXIO); 172 tp = &pt_tty[minor(dev)]; 173 if ((tp->t_state & TS_ISOPEN) == 0) { 174 ttychars(tp); /* Set up default chars */ 175 tp->t_iflag = TTYDEF_IFLAG; 176 tp->t_oflag = TTYDEF_OFLAG; 177 tp->t_lflag = TTYDEF_LFLAG; 178 tp->t_cflag = TTYDEF_CFLAG; 179 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 180 ttsetwater(tp); /* would be done in xxparam() */ 181 } else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0) 182 return (EBUSY); 183 if (tp->t_oproc) /* Ctrlr still around. */ 184 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 185 while ((tp->t_state & TS_CARR_ON) == 0) { 186 if (flag&FNONBLOCK) 187 break; 188 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 189 "ptsopn", 0); 190 if (error) 191 return (error); 192 } 193 error = (*linesw[tp->t_line].l_open)(dev, tp); 194 if (error == 0) 195 ptcwakeup(tp, FREAD|FWRITE); 196 return (error); 197} 198 199static int 200ptsclose(dev, flag, mode, p) 201 dev_t dev; 202 int flag, mode; 203 struct proc *p; 204{ 205 register struct tty *tp; 206 int err; 207 208 tp = &pt_tty[minor(dev)]; 209 err = (*linesw[tp->t_line].l_close)(tp, flag); 210 ptsstop(tp, FREAD|FWRITE); 211 (void) ttyclose(tp); 212 return (err); 213} 214 215static int 216ptsread(dev, uio, flag) 217 dev_t dev; 218 struct uio *uio; 219 int flag; 220{ 221 struct proc *p = curproc; 222 register struct tty *tp = &pt_tty[minor(dev)]; 223 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 224 int error = 0; 225 226again: 227 if (pti->pt_flags & PF_REMOTE) { 228 while (isbackground(p, tp)) { 229 if ((p->p_sigignore & sigmask(SIGTTIN)) || 230 (p->p_sigmask & sigmask(SIGTTIN)) || 231 p->p_pgrp->pg_jobc == 0 || 232 p->p_flag & P_PPWAIT) 233 return (EIO); 234 pgsignal(p->p_pgrp, SIGTTIN, 1); 235 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 236 0); 237 if (error) 238 return (error); 239 } 240 if (tp->t_canq.c_cc == 0) { 241 if (flag & IO_NDELAY) 242 return (EWOULDBLOCK); 243 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 244 "ptsin", 0); 245 if (error) 246 return (error); 247 goto again; 248 } 249 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 250 if (ureadc(getc(&tp->t_canq), uio) < 0) { 251 error = EFAULT; 252 break; 253 } 254 if (tp->t_canq.c_cc == 1) 255 (void) getc(&tp->t_canq); 256 if (tp->t_canq.c_cc) 257 return (error); 258 } else 259 if (tp->t_oproc) 260 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 261 ptcwakeup(tp, FWRITE); 262 return (error); 263} 264 265/* 266 * Write to pseudo-tty. 267 * Wakeups of controlling tty will happen 268 * indirectly, when tty driver calls ptsstart. 269 */ 270static int 271ptswrite(dev, uio, flag) 272 dev_t dev; 273 struct uio *uio; 274 int flag; 275{ 276 register struct tty *tp; 277 278 tp = &pt_tty[minor(dev)]; 279 if (tp->t_oproc == 0) 280 return (EIO); 281 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 282} 283 284/* 285 * Start output on pseudo-tty. 286 * Wake up process selecting or sleeping for input from controlling tty. 287 */ 288static void 289ptsstart(tp) 290 struct tty *tp; 291{ 292 register struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 293 294 if (tp->t_state & TS_TTSTOP) 295 return; 296 if (pti->pt_flags & PF_STOPPED) { 297 pti->pt_flags &= ~PF_STOPPED; 298 pti->pt_send = TIOCPKT_START; 299 } 300 ptcwakeup(tp, FREAD); 301} 302 303static void 304ptcwakeup(tp, flag) 305 struct tty *tp; 306 int flag; 307{ 308 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 309 310 if (flag & FREAD) { 311 selwakeup(&pti->pt_selr); 312 wakeup(TSA_PTC_READ(tp)); 313 } 314 if (flag & FWRITE) { 315 selwakeup(&pti->pt_selw); 316 wakeup(TSA_PTC_WRITE(tp)); 317 } 318} 319 320static int 321ptcopen(dev, flag, devtype, p) 322 dev_t dev; 323 int flag, devtype; 324 struct proc *p; 325{ 326 register struct tty *tp; 327 struct pt_ioctl *pti; 328 329 if (minor(dev) >= npty) 330 return (ENXIO); 331 tp = &pt_tty[minor(dev)]; 332 if (tp->t_oproc) 333 return (EIO); 334 tp->t_oproc = ptsstart; 335#ifdef sun4c 336 tp->t_stop = ptsstop; 337#endif 338 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 339 tp->t_lflag &= ~EXTPROC; 340 pti = &pt_ioctl[minor(dev)]; 341 pti->pt_flags = 0; 342 pti->pt_send = 0; 343 pti->pt_ucntl = 0; 344 return (0); 345} 346 347static int 348ptcclose(dev, flags, fmt, p) 349 dev_t dev; 350 int flags; 351 int fmt; 352 struct proc *p; 353{ 354 register struct tty *tp; 355 356 tp = &pt_tty[minor(dev)]; 357 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 358 359 /* 360 * XXX MDMBUF makes no sense for ptys but would inhibit the above 361 * l_modem(). CLOCAL makes sense but isn't supported. Special 362 * l_modem()s that ignore carrier drop make no sense for ptys but 363 * may be in use because other parts of the line discipline make 364 * sense for ptys. Recover by doing everything that a normal 365 * ttymodem() would have done except for sending a SIGHUP. 366 */ 367 if (tp->t_state & TS_ISOPEN) { 368 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 369 tp->t_state |= TS_ZOMBIE; 370 ttyflush(tp, FREAD | FWRITE); 371 } 372 373 tp->t_oproc = 0; /* mark closed */ 374 return (0); 375} 376 377static int 378ptcread(dev, uio, flag) 379 dev_t dev; 380 struct uio *uio; 381 int flag; 382{ 383 register struct tty *tp = &pt_tty[minor(dev)]; 384 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 385 char buf[BUFSIZ]; 386 int error = 0, cc; 387 388 /* 389 * We want to block until the slave 390 * is open, and there's something to read; 391 * but if we lost the slave or we're NBIO, 392 * then return the appropriate error instead. 393 */ 394 for (;;) { 395 if (tp->t_state&TS_ISOPEN) { 396 if (pti->pt_flags&PF_PKT && pti->pt_send) { 397 error = ureadc((int)pti->pt_send, uio); 398 if (error) 399 return (error); 400 if (pti->pt_send & TIOCPKT_IOCTL) { 401 cc = min(uio->uio_resid, 402 sizeof(tp->t_termios)); 403 uiomove((caddr_t)&tp->t_termios, cc, 404 uio); 405 } 406 pti->pt_send = 0; 407 return (0); 408 } 409 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 410 error = ureadc((int)pti->pt_ucntl, uio); 411 if (error) 412 return (error); 413 pti->pt_ucntl = 0; 414 return (0); 415 } 416 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 417 break; 418 } 419 if ((tp->t_state & TS_CONNECTED) == 0) 420 return (0); /* EOF */ 421 if (flag & IO_NDELAY) 422 return (EWOULDBLOCK); 423 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 424 if (error) 425 return (error); 426 } 427 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 428 error = ureadc(0, uio); 429 while (uio->uio_resid > 0 && error == 0) { 430 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 431 if (cc <= 0) 432 break; 433 error = uiomove(buf, cc, uio); 434 } 435 ttwwakeup(tp); 436 return (error); 437} 438 439static void 440ptsstop(tp, flush) 441 register struct tty *tp; 442 int flush; 443{ 444 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 445 int flag; 446 447 /* note: FLUSHREAD and FLUSHWRITE already ok */ 448 if (flush == 0) { 449 flush = TIOCPKT_STOP; 450 pti->pt_flags |= PF_STOPPED; 451 } else 452 pti->pt_flags &= ~PF_STOPPED; 453 pti->pt_send |= flush; 454 /* change of perspective */ 455 flag = 0; 456 if (flush & FREAD) 457 flag |= FWRITE; 458 if (flush & FWRITE) 459 flag |= FREAD; 460 ptcwakeup(tp, flag); 461} 462 463static int 464ptcpoll(dev, events, p) 465 dev_t dev; 466 int events; 467 struct proc *p; 468{ 469 register struct tty *tp = &pt_tty[minor(dev)]; 470 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 471 int revents = 0; 472 int s; 473 474 if ((tp->t_state & TS_CONNECTED) == 0) 475 return (seltrue(dev, events, p) | POLLHUP); 476 477 /* 478 * Need to block timeouts (ttrstart). 479 */ 480 s = spltty(); 481 482 if (events & (POLLIN | POLLRDNORM)) 483 if ((tp->t_state & TS_ISOPEN) && 484 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 485 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 486 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 487 revents |= events & (POLLIN | POLLRDNORM); 488 489 if (events & (POLLOUT | POLLWRNORM)) 490 if (tp->t_state & TS_ISOPEN && 491 ((pti->pt_flags & PF_REMOTE) ? 492 (tp->t_canq.c_cc == 0) : 493 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 494 (tp->t_canq.c_cc == 0 && (tp->t_iflag & ICANON))))) 495 revents |= events & (POLLOUT | POLLWRNORM); 496 497 if (events & POLLHUP) 498 if ((tp->t_state & TS_CARR_ON) == 0) 499 revents |= POLLHUP; 500 501 if (revents == 0) { 502 if (events & (POLLIN | POLLRDNORM)) 503 selrecord(p, &pti->pt_selr); 504 505 if (events & (POLLOUT | POLLWRNORM)) 506 selrecord(p, &pti->pt_selw); 507 } 508 splx(s); 509 510 return (revents); 511} 512 513static int 514ptcwrite(dev, uio, flag) 515 dev_t dev; 516 register struct uio *uio; 517 int flag; 518{ 519 register struct tty *tp = &pt_tty[minor(dev)]; 520 register u_char *cp = 0; 521 register int cc = 0; 522 u_char locbuf[BUFSIZ]; 523 int cnt = 0; 524 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 525 int error = 0; 526 527again: 528 if ((tp->t_state&TS_ISOPEN) == 0) 529 goto block; 530 if (pti->pt_flags & PF_REMOTE) { 531 if (tp->t_canq.c_cc) 532 goto block; 533 while ((uio->uio_resid > 0 || cc > 0) && 534 tp->t_canq.c_cc < TTYHOG - 1) { 535 if (cc == 0) { 536 cc = min(uio->uio_resid, BUFSIZ); 537 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 538 cp = locbuf; 539 error = uiomove((caddr_t)cp, cc, uio); 540 if (error) 541 return (error); 542 /* check again for safety */ 543 if ((tp->t_state & TS_ISOPEN) == 0) { 544 /* adjust as usual */ 545 uio->uio_resid += cc; 546 return (EIO); 547 } 548 } 549 if (cc > 0) { 550 cc = b_to_q((char *)cp, cc, &tp->t_canq); 551 /* 552 * XXX we don't guarantee that the canq size 553 * is >= TTYHOG, so the above b_to_q() may 554 * leave some bytes uncopied. However, space 555 * is guaranteed for the null terminator if 556 * we don't fail here since (TTYHOG - 1) is 557 * not a multiple of CBSIZE. 558 */ 559 if (cc > 0) 560 break; 561 } 562 } 563 /* adjust for data copied in but not written */ 564 uio->uio_resid += cc; 565 (void) putc(0, &tp->t_canq); 566 ttwakeup(tp); 567 wakeup(TSA_PTS_READ(tp)); 568 return (0); 569 } 570 while (uio->uio_resid > 0 || cc > 0) { 571 if (cc == 0) { 572 cc = min(uio->uio_resid, BUFSIZ); 573 cp = locbuf; 574 error = uiomove((caddr_t)cp, cc, uio); 575 if (error) 576 return (error); 577 /* check again for safety */ 578 if ((tp->t_state & TS_ISOPEN) == 0) { 579 /* adjust for data copied in but not written */ 580 uio->uio_resid += cc; 581 return (EIO); 582 } 583 } 584 while (cc > 0) { 585 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 586 (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) { 587 wakeup(TSA_HUP_OR_INPUT(tp)); 588 goto block; 589 } 590 (*linesw[tp->t_line].l_rint)(*cp++, tp); 591 cnt++; 592 cc--; 593 } 594 cc = 0; 595 } 596 return (0); 597block: 598 /* 599 * Come here to wait for slave to open, for space 600 * in outq, or space in rawq, or an empty canq. 601 */ 602 if ((tp->t_state & TS_CONNECTED) == 0) { 603 /* adjust for data copied in but not written */ 604 uio->uio_resid += cc; 605 return (EIO); 606 } 607 if (flag & IO_NDELAY) { 608 /* adjust for data copied in but not written */ 609 uio->uio_resid += cc; 610 if (cnt == 0) 611 return (EWOULDBLOCK); 612 return (0); 613 } 614 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 615 if (error) { 616 /* adjust for data copied in but not written */ 617 uio->uio_resid += cc; 618 return (error); 619 } 620 goto again; 621} 622 623static struct tty * 624ptydevtotty(dev) 625 dev_t dev; 626{ 627 if (minor(dev) >= npty) 628 return (NULL); 629 630 return &pt_tty[minor(dev)]; 631} 632 633/*ARGSUSED*/ 634static int 635ptyioctl(dev, cmd, data, flag, p) 636 dev_t dev; 637 int cmd; 638 caddr_t data; 639 int flag; 640 struct proc *p; 641{ 642 register struct tty *tp = &pt_tty[minor(dev)]; 643 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 644 register u_char *cc = tp->t_cc; 645 int stop, error; 646 647 /* 648 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 649 * ttywflush(tp) will hang if there are characters in the outq. 650 */ 651 if (cmd == TIOCEXT) { 652 /* 653 * When the EXTPROC bit is being toggled, we need 654 * to send an TIOCPKT_IOCTL if the packet driver 655 * is turned on. 656 */ 657 if (*(int *)data) { 658 if (pti->pt_flags & PF_PKT) { 659 pti->pt_send |= TIOCPKT_IOCTL; 660 ptcwakeup(tp, FREAD); 661 } 662 tp->t_lflag |= EXTPROC; 663 } else { 664 if ((tp->t_lflag & EXTPROC) && 665 (pti->pt_flags & PF_PKT)) { 666 pti->pt_send |= TIOCPKT_IOCTL; 667 ptcwakeup(tp, FREAD); 668 } 669 tp->t_lflag &= ~EXTPROC; 670 } 671 return(0); 672 } else 673 if (cdevsw[major(dev)]->d_open == ptcopen) 674 switch (cmd) { 675 676 case TIOCGPGRP: 677 /* 678 * We aviod calling ttioctl on the controller since, 679 * in that case, tp must be the controlling terminal. 680 */ 681 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 682 return (0); 683 684 case TIOCPKT: 685 if (*(int *)data) { 686 if (pti->pt_flags & PF_UCNTL) 687 return (EINVAL); 688 pti->pt_flags |= PF_PKT; 689 } else 690 pti->pt_flags &= ~PF_PKT; 691 return (0); 692 693 case TIOCUCNTL: 694 if (*(int *)data) { 695 if (pti->pt_flags & PF_PKT) 696 return (EINVAL); 697 pti->pt_flags |= PF_UCNTL; 698 } else 699 pti->pt_flags &= ~PF_UCNTL; 700 return (0); 701 702 case TIOCREMOTE: 703 if (*(int *)data) 704 pti->pt_flags |= PF_REMOTE; 705 else 706 pti->pt_flags &= ~PF_REMOTE; 707 ttyflush(tp, FREAD|FWRITE); 708 return (0); 709 710#ifdef COMPAT_43 711 case TIOCSETP: 712 case TIOCSETN: 713#endif 714 case TIOCSETD: 715 case TIOCSETA: 716 case TIOCSETAW: 717 case TIOCSETAF: 718 ndflush(&tp->t_outq, tp->t_outq.c_cc); 719 break; 720 721 case TIOCSIG: 722 if (*(unsigned int *)data >= NSIG || 723 *(unsigned int *)data == 0) 724 return(EINVAL); 725 if ((tp->t_lflag&NOFLSH) == 0) 726 ttyflush(tp, FREAD|FWRITE); 727 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 728 if ((*(unsigned int *)data == SIGINFO) && 729 ((tp->t_lflag&NOKERNINFO) == 0)) 730 ttyinfo(tp); 731 return(0); 732 } 733 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 734 if (error == ENOIOCTL) 735 error = ttioctl(tp, cmd, data, flag); 736 if (error == ENOIOCTL) { 737 if (pti->pt_flags & PF_UCNTL && 738 (cmd & ~0xff) == UIOCCMD(0)) { 739 if (cmd & 0xff) { 740 pti->pt_ucntl = (u_char)cmd; 741 ptcwakeup(tp, FREAD); 742 } 743 return (0); 744 } 745 error = ENOTTY; 746 } 747 /* 748 * If external processing and packet mode send ioctl packet. 749 */ 750 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 751 switch(cmd) { 752 case TIOCSETA: 753 case TIOCSETAW: 754 case TIOCSETAF: 755#ifdef COMPAT_43 756 case TIOCSETP: 757 case TIOCSETN: 758#endif 759#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 760 case TIOCSETC: 761 case TIOCSLTC: 762 case TIOCLBIS: 763 case TIOCLBIC: 764 case TIOCLSET: 765#endif 766 pti->pt_send |= TIOCPKT_IOCTL; 767 ptcwakeup(tp, FREAD); 768 default: 769 break; 770 } 771 } 772 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 773 && CCEQ(cc[VSTART], CTRL('q')); 774 if (pti->pt_flags & PF_NOSTOP) { 775 if (stop) { 776 pti->pt_send &= ~TIOCPKT_NOSTOP; 777 pti->pt_send |= TIOCPKT_DOSTOP; 778 pti->pt_flags &= ~PF_NOSTOP; 779 ptcwakeup(tp, FREAD); 780 } 781 } else { 782 if (!stop) { 783 pti->pt_send &= ~TIOCPKT_DOSTOP; 784 pti->pt_send |= TIOCPKT_NOSTOP; 785 pti->pt_flags |= PF_NOSTOP; 786 ptcwakeup(tp, FREAD); 787 } 788 } 789 return (error); 790} 791 792static ptc_devsw_installed = 0; 793 794static void ptc_drvinit __P((void *unused)); 795static void 796ptc_drvinit(unused) 797 void *unused; 798{ 799#ifdef DEVFS 800 int i,j,k; 801#endif 802 dev_t dev; 803 804 if( ! ptc_devsw_installed ) { 805 dev = makedev(CDEV_MAJOR_S, 0); 806 cdevsw_add(&dev, &pts_cdevsw, NULL); 807 dev = makedev(CDEV_MAJOR_C, 0); 808 cdevsw_add(&dev, &ptc_cdevsw, NULL); 809 ptc_devsw_installed = 1; 810#ifdef DEVFS 811 for ( i = 0 ; i<NPTY ; i++ ) { 812 j = i / 32; 813 k = i % 32; 814 devfs_token_pts[i] = 815 devfs_add_devswf(&pts_cdevsw,i, 816 DV_CHR,0,0,0666, 817 "tty%c%n",jnames[j],k); 818 devfs_token_ptc[i] = 819 devfs_add_devswf(&ptc_cdevsw,i, 820 DV_CHR,0,0,0666, 821 "pty%c%n",jnames[j],k); 822 } 823#endif 824 } 825} 826 827SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL) 828