pty.c revision 31577
1160499Srwatson/* 2160499Srwatson * Copyright (c) 1982, 1986, 1989, 1993 3160499Srwatson * The Regents of the University of California. All rights reserved. 4160499Srwatson * 5160499Srwatson * Redistribution and use in source and binary forms, with or without 6276486Sngie * modification, are permitted provided that the following conditions 7160500Srwatson * are met: 8160499Srwatson * 1. Redistributions of source code must retain the above copyright 9160499Srwatson * 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 1.47 1997/09/16 11:43:32 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/poll.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_poll_t ptcpoll; 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 ttpoll, nommap, NULL, "pts", NULL, -1 }; 86 87static struct cdevsw ptc_cdevsw = 88 { ptcopen, ptcclose, ptcread, ptcwrite, /*6*/ 89 ptyioctl, nullstop, nullreset, ptydevtotty,/* ptyp */ 90 ptcpoll, nommap, NULL, "ptc", NULL, -1 }; 91 92 93#if NPTY == 1 94#undef NPTY 95#define NPTY 32 /* crude XXX */ 96#warning You have only one pty defined, redefining to 32. 97#endif 98 99#ifdef DEVFS 100#define MAXUNITS (8 * 32) 101static void *devfs_token_pts[MAXUNITS]; 102static void *devfs_token_ptc[MAXUNITS]; 103static const char jnames[] = "pqrsPQRS"; 104#if NPTY > MAXUNITS 105#undef NPTY 106#define NPTY MAXUNITS 107#warning Can't have more than 256 pty's with DEVFS defined. 108#endif 109#endif 110 111#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 112 113/* 114 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 115 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 116 */ 117static struct tty pt_tty[NPTY]; /* XXX */ 118static struct pt_ioctl { 119 int pt_flags; 120 struct selinfo pt_selr, pt_selw; 121 u_char pt_send; 122 u_char pt_ucntl; 123} pt_ioctl[NPTY]; /* XXX */ 124static int npty = NPTY; /* for pstat -t */ 125 126#define PF_PKT 0x08 /* packet mode */ 127#define PF_STOPPED 0x10 /* user told stopped */ 128#define PF_REMOTE 0x20 /* remote and flow controlled input */ 129#define PF_NOSTOP 0x40 130#define PF_UCNTL 0x80 /* user control mode */ 131 132#ifdef notyet 133/* 134 * Establish n (or default if n is 1) ptys in the system. 135 * 136 * XXX cdevsw & pstat require the array `pty[]' to be an array 137 */ 138static void 139ptyattach(n) 140 int n; 141{ 142 char *mem; 143 register u_long ntb; 144#define DEFAULT_NPTY 32 145 146 /* maybe should allow 0 => none? */ 147 if (n <= 1) 148 n = DEFAULT_NPTY; 149 ntb = n * sizeof(struct tty); 150 mem = malloc(ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl), 151 M_DEVBUF, M_WAITOK); 152 pt_tty = (struct tty *)mem; 153 mem = (char *)ALIGN(mem + ntb); 154 pt_ioctl = (struct pt_ioctl *)mem; 155 npty = n; 156} 157#endif 158 159/*ARGSUSED*/ 160static int 161ptsopen(dev, flag, devtype, p) 162 dev_t dev; 163 int flag, devtype; 164 struct proc *p; 165{ 166 register struct tty *tp; 167 int error; 168 169 if (minor(dev) >= npty) 170 return (ENXIO); 171 tp = &pt_tty[minor(dev)]; 172 if ((tp->t_state & TS_ISOPEN) == 0) { 173 ttychars(tp); /* Set up default chars */ 174 tp->t_iflag = TTYDEF_IFLAG; 175 tp->t_oflag = TTYDEF_OFLAG; 176 tp->t_lflag = TTYDEF_LFLAG; 177 tp->t_cflag = TTYDEF_CFLAG; 178 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 179 ttsetwater(tp); /* would be done in xxparam() */ 180 } else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0) 181 return (EBUSY); 182 if (tp->t_oproc) /* Ctrlr still around. */ 183 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 184 while ((tp->t_state & TS_CARR_ON) == 0) { 185 if (flag&FNONBLOCK) 186 break; 187 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 188 "ptsopn", 0); 189 if (error) 190 return (error); 191 } 192 error = (*linesw[tp->t_line].l_open)(dev, tp); 193 if (error == 0) 194 ptcwakeup(tp, FREAD|FWRITE); 195 return (error); 196} 197 198static int 199ptsclose(dev, flag, mode, p) 200 dev_t dev; 201 int flag, mode; 202 struct proc *p; 203{ 204 register struct tty *tp; 205 int err; 206 207 tp = &pt_tty[minor(dev)]; 208 err = (*linesw[tp->t_line].l_close)(tp, flag); 209 ptsstop(tp, FREAD|FWRITE); 210 (void) ttyclose(tp); 211 return (err); 212} 213 214static int 215ptsread(dev, uio, flag) 216 dev_t dev; 217 struct uio *uio; 218 int flag; 219{ 220 struct proc *p = curproc; 221 register struct tty *tp = &pt_tty[minor(dev)]; 222 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 223 int error = 0; 224 225again: 226 if (pti->pt_flags & PF_REMOTE) { 227 while (isbackground(p, tp)) { 228 if ((p->p_sigignore & sigmask(SIGTTIN)) || 229 (p->p_sigmask & sigmask(SIGTTIN)) || 230 p->p_pgrp->pg_jobc == 0 || 231 p->p_flag & P_PPWAIT) 232 return (EIO); 233 pgsignal(p->p_pgrp, SIGTTIN, 1); 234 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 235 0); 236 if (error) 237 return (error); 238 } 239 if (tp->t_canq.c_cc == 0) { 240 if (flag & IO_NDELAY) 241 return (EWOULDBLOCK); 242 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 243 "ptsin", 0); 244 if (error) 245 return (error); 246 goto again; 247 } 248 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 249 if (ureadc(getc(&tp->t_canq), uio) < 0) { 250 error = EFAULT; 251 break; 252 } 253 if (tp->t_canq.c_cc == 1) 254 (void) getc(&tp->t_canq); 255 if (tp->t_canq.c_cc) 256 return (error); 257 } else 258 if (tp->t_oproc) 259 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 260 ptcwakeup(tp, FWRITE); 261 return (error); 262} 263 264/* 265 * Write to pseudo-tty. 266 * Wakeups of controlling tty will happen 267 * indirectly, when tty driver calls ptsstart. 268 */ 269static int 270ptswrite(dev, uio, flag) 271 dev_t dev; 272 struct uio *uio; 273 int flag; 274{ 275 register struct tty *tp; 276 277 tp = &pt_tty[minor(dev)]; 278 if (tp->t_oproc == 0) 279 return (EIO); 280 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 281} 282 283/* 284 * Start output on pseudo-tty. 285 * Wake up process selecting or sleeping for input from controlling tty. 286 */ 287static void 288ptsstart(tp) 289 struct tty *tp; 290{ 291 register struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 292 293 if (tp->t_state & TS_TTSTOP) 294 return; 295 if (pti->pt_flags & PF_STOPPED) { 296 pti->pt_flags &= ~PF_STOPPED; 297 pti->pt_send = TIOCPKT_START; 298 } 299 ptcwakeup(tp, FREAD); 300} 301 302static void 303ptcwakeup(tp, flag) 304 struct tty *tp; 305 int flag; 306{ 307 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 308 309 if (flag & FREAD) { 310 selwakeup(&pti->pt_selr); 311 wakeup(TSA_PTC_READ(tp)); 312 } 313 if (flag & FWRITE) { 314 selwakeup(&pti->pt_selw); 315 wakeup(TSA_PTC_WRITE(tp)); 316 } 317} 318 319static int 320ptcopen(dev, flag, devtype, p) 321 dev_t dev; 322 int flag, devtype; 323 struct proc *p; 324{ 325 register struct tty *tp; 326 struct pt_ioctl *pti; 327 328 if (minor(dev) >= npty) 329 return (ENXIO); 330 tp = &pt_tty[minor(dev)]; 331 if (tp->t_oproc) 332 return (EIO); 333 tp->t_oproc = ptsstart; 334#ifdef sun4c 335 tp->t_stop = ptsstop; 336#endif 337 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 338 tp->t_lflag &= ~EXTPROC; 339 pti = &pt_ioctl[minor(dev)]; 340 pti->pt_flags = 0; 341 pti->pt_send = 0; 342 pti->pt_ucntl = 0; 343 return (0); 344} 345 346static int 347ptcclose(dev, flags, fmt, p) 348 dev_t dev; 349 int flags; 350 int fmt; 351 struct proc *p; 352{ 353 register struct tty *tp; 354 355 tp = &pt_tty[minor(dev)]; 356 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 357 358 /* 359 * XXX MDMBUF makes no sense for ptys but would inhibit the above 360 * l_modem(). CLOCAL makes sense but isn't supported. Special 361 * l_modem()s that ignore carrier drop make no sense for ptys but 362 * may be in use because other parts of the line discipline make 363 * sense for ptys. Recover by doing everything that a normal 364 * ttymodem() would have done except for sending a SIGHUP. 365 */ 366 if (tp->t_state & TS_ISOPEN) { 367 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 368 tp->t_state |= TS_ZOMBIE; 369 ttyflush(tp, FREAD | FWRITE); 370 } 371 372 tp->t_oproc = 0; /* mark closed */ 373 return (0); 374} 375 376static int 377ptcread(dev, uio, flag) 378 dev_t dev; 379 struct uio *uio; 380 int flag; 381{ 382 register struct tty *tp = &pt_tty[minor(dev)]; 383 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 384 char buf[BUFSIZ]; 385 int error = 0, cc; 386 387 /* 388 * We want to block until the slave 389 * is open, and there's something to read; 390 * but if we lost the slave or we're NBIO, 391 * then return the appropriate error instead. 392 */ 393 for (;;) { 394 if (tp->t_state&TS_ISOPEN) { 395 if (pti->pt_flags&PF_PKT && pti->pt_send) { 396 error = ureadc((int)pti->pt_send, uio); 397 if (error) 398 return (error); 399 if (pti->pt_send & TIOCPKT_IOCTL) { 400 cc = min(uio->uio_resid, 401 sizeof(tp->t_termios)); 402 uiomove((caddr_t)&tp->t_termios, cc, 403 uio); 404 } 405 pti->pt_send = 0; 406 return (0); 407 } 408 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 409 error = ureadc((int)pti->pt_ucntl, uio); 410 if (error) 411 return (error); 412 pti->pt_ucntl = 0; 413 return (0); 414 } 415 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 416 break; 417 } 418 if ((tp->t_state & TS_CONNECTED) == 0) 419 return (0); /* EOF */ 420 if (flag & IO_NDELAY) 421 return (EWOULDBLOCK); 422 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 423 if (error) 424 return (error); 425 } 426 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 427 error = ureadc(0, uio); 428 while (uio->uio_resid > 0 && error == 0) { 429 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 430 if (cc <= 0) 431 break; 432 error = uiomove(buf, cc, uio); 433 } 434 ttwwakeup(tp); 435 return (error); 436} 437 438static void 439ptsstop(tp, flush) 440 register struct tty *tp; 441 int flush; 442{ 443 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 444 int flag; 445 446 /* note: FLUSHREAD and FLUSHWRITE already ok */ 447 if (flush == 0) { 448 flush = TIOCPKT_STOP; 449 pti->pt_flags |= PF_STOPPED; 450 } else 451 pti->pt_flags &= ~PF_STOPPED; 452 pti->pt_send |= flush; 453 /* change of perspective */ 454 flag = 0; 455 if (flush & FREAD) 456 flag |= FWRITE; 457 if (flush & FWRITE) 458 flag |= FREAD; 459 ptcwakeup(tp, flag); 460} 461 462static int 463ptcpoll(dev, events, p) 464 dev_t dev; 465 int events; 466 struct proc *p; 467{ 468 register struct tty *tp = &pt_tty[minor(dev)]; 469 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 470 int revents = 0; 471 int s; 472 473 if ((tp->t_state & TS_CONNECTED) == 0) 474 return (seltrue(dev, events, p) | POLLHUP); 475 476 /* 477 * Need to block timeouts (ttrstart). 478 */ 479 s = spltty(); 480 481 if (events & (POLLIN | POLLRDNORM)) 482 if ((tp->t_state & TS_ISOPEN) && 483 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 484 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 485 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 486 revents |= events & (POLLIN | POLLRDNORM); 487 488 if (events & (POLLOUT | POLLWRNORM)) 489 if (tp->t_state & TS_ISOPEN && 490 ((pti->pt_flags & PF_REMOTE) ? 491 (tp->t_canq.c_cc == 0) : 492 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 493 (tp->t_canq.c_cc == 0 && (tp->t_iflag & ICANON))))) 494 revents |= events & (POLLOUT | POLLWRNORM); 495 496 if (events & POLLHUP) 497 if ((tp->t_state & TS_CARR_ON) == 0) 498 revents |= POLLHUP; 499 500 if (revents == 0) { 501 if (events & (POLLIN | POLLRDNORM)) 502 selrecord(p, &pti->pt_selr); 503 504 if (events & (POLLOUT | POLLWRNORM)) 505 selrecord(p, &pti->pt_selw); 506 } 507 splx(s); 508 509 return (revents); 510} 511 512static int 513ptcwrite(dev, uio, flag) 514 dev_t dev; 515 register struct uio *uio; 516 int flag; 517{ 518 register struct tty *tp = &pt_tty[minor(dev)]; 519 register u_char *cp = 0; 520 register int cc = 0; 521 u_char locbuf[BUFSIZ]; 522 int cnt = 0; 523 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 524 int error = 0; 525 526again: 527 if ((tp->t_state&TS_ISOPEN) == 0) 528 goto block; 529 if (pti->pt_flags & PF_REMOTE) { 530 if (tp->t_canq.c_cc) 531 goto block; 532 while ((uio->uio_resid > 0 || cc > 0) && 533 tp->t_canq.c_cc < TTYHOG - 1) { 534 if (cc == 0) { 535 cc = min(uio->uio_resid, BUFSIZ); 536 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 537 cp = locbuf; 538 error = uiomove((caddr_t)cp, cc, uio); 539 if (error) 540 return (error); 541 /* check again for safety */ 542 if ((tp->t_state & TS_ISOPEN) == 0) { 543 /* adjust as usual */ 544 uio->uio_resid += cc; 545 return (EIO); 546 } 547 } 548 if (cc > 0) { 549 cc = b_to_q((char *)cp, cc, &tp->t_canq); 550 /* 551 * XXX we don't guarantee that the canq size 552 * is >= TTYHOG, so the above b_to_q() may 553 * leave some bytes uncopied. However, space 554 * is guaranteed for the null terminator if 555 * we don't fail here since (TTYHOG - 1) is 556 * not a multiple of CBSIZE. 557 */ 558 if (cc > 0) 559 break; 560 } 561 } 562 /* adjust for data copied in but not written */ 563 uio->uio_resid += cc; 564 (void) putc(0, &tp->t_canq); 565 ttwakeup(tp); 566 wakeup(TSA_PTS_READ(tp)); 567 return (0); 568 } 569 while (uio->uio_resid > 0 || cc > 0) { 570 if (cc == 0) { 571 cc = min(uio->uio_resid, BUFSIZ); 572 cp = locbuf; 573 error = uiomove((caddr_t)cp, cc, uio); 574 if (error) 575 return (error); 576 /* check again for safety */ 577 if ((tp->t_state & TS_ISOPEN) == 0) { 578 /* adjust for data copied in but not written */ 579 uio->uio_resid += cc; 580 return (EIO); 581 } 582 } 583 while (cc > 0) { 584 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 585 (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) { 586 wakeup(TSA_HUP_OR_INPUT(tp)); 587 goto block; 588 } 589 (*linesw[tp->t_line].l_rint)(*cp++, tp); 590 cnt++; 591 cc--; 592 } 593 cc = 0; 594 } 595 return (0); 596block: 597 /* 598 * Come here to wait for slave to open, for space 599 * in outq, or space in rawq, or an empty canq. 600 */ 601 if ((tp->t_state & TS_CONNECTED) == 0) { 602 /* adjust for data copied in but not written */ 603 uio->uio_resid += cc; 604 return (EIO); 605 } 606 if (flag & IO_NDELAY) { 607 /* adjust for data copied in but not written */ 608 uio->uio_resid += cc; 609 if (cnt == 0) 610 return (EWOULDBLOCK); 611 return (0); 612 } 613 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 614 if (error) { 615 /* adjust for data copied in but not written */ 616 uio->uio_resid += cc; 617 return (error); 618 } 619 goto again; 620} 621 622static struct tty * 623ptydevtotty(dev) 624 dev_t dev; 625{ 626 if (minor(dev) >= npty) 627 return (NULL); 628 629 return &pt_tty[minor(dev)]; 630} 631 632/*ARGSUSED*/ 633static int 634ptyioctl(dev, cmd, data, flag, p) 635 dev_t dev; 636 int cmd; 637 caddr_t data; 638 int flag; 639 struct proc *p; 640{ 641 register struct tty *tp = &pt_tty[minor(dev)]; 642 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 643 register u_char *cc = tp->t_cc; 644 int stop, error; 645 646 /* 647 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 648 * ttywflush(tp) will hang if there are characters in the outq. 649 */ 650 if (cmd == TIOCEXT) { 651 /* 652 * When the EXTPROC bit is being toggled, we need 653 * to send an TIOCPKT_IOCTL if the packet driver 654 * is turned on. 655 */ 656 if (*(int *)data) { 657 if (pti->pt_flags & PF_PKT) { 658 pti->pt_send |= TIOCPKT_IOCTL; 659 ptcwakeup(tp, FREAD); 660 } 661 tp->t_lflag |= EXTPROC; 662 } else { 663 if ((tp->t_lflag & EXTPROC) && 664 (pti->pt_flags & PF_PKT)) { 665 pti->pt_send |= TIOCPKT_IOCTL; 666 ptcwakeup(tp, FREAD); 667 } 668 tp->t_lflag &= ~EXTPROC; 669 } 670 return(0); 671 } else 672 if (cdevsw[major(dev)]->d_open == ptcopen) 673 switch (cmd) { 674 675 case TIOCGPGRP: 676 /* 677 * We aviod calling ttioctl on the controller since, 678 * in that case, tp must be the controlling terminal. 679 */ 680 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 681 return (0); 682 683 case TIOCPKT: 684 if (*(int *)data) { 685 if (pti->pt_flags & PF_UCNTL) 686 return (EINVAL); 687 pti->pt_flags |= PF_PKT; 688 } else 689 pti->pt_flags &= ~PF_PKT; 690 return (0); 691 692 case TIOCUCNTL: 693 if (*(int *)data) { 694 if (pti->pt_flags & PF_PKT) 695 return (EINVAL); 696 pti->pt_flags |= PF_UCNTL; 697 } else 698 pti->pt_flags &= ~PF_UCNTL; 699 return (0); 700 701 case TIOCREMOTE: 702 if (*(int *)data) 703 pti->pt_flags |= PF_REMOTE; 704 else 705 pti->pt_flags &= ~PF_REMOTE; 706 ttyflush(tp, FREAD|FWRITE); 707 return (0); 708 709#ifdef COMPAT_43 710 case TIOCSETP: 711 case TIOCSETN: 712#endif 713 case TIOCSETD: 714 case TIOCSETA: 715 case TIOCSETAW: 716 case TIOCSETAF: 717 ndflush(&tp->t_outq, tp->t_outq.c_cc); 718 break; 719 720 case TIOCSIG: 721 if (*(unsigned int *)data >= NSIG || 722 *(unsigned int *)data == 0) 723 return(EINVAL); 724 if ((tp->t_lflag&NOFLSH) == 0) 725 ttyflush(tp, FREAD|FWRITE); 726 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 727 if ((*(unsigned int *)data == SIGINFO) && 728 ((tp->t_lflag&NOKERNINFO) == 0)) 729 ttyinfo(tp); 730 return(0); 731 } 732 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 733 if (error == ENOIOCTL) 734 error = ttioctl(tp, cmd, data, flag); 735 if (error == ENOIOCTL) { 736 if (pti->pt_flags & PF_UCNTL && 737 (cmd & ~0xff) == UIOCCMD(0)) { 738 if (cmd & 0xff) { 739 pti->pt_ucntl = (u_char)cmd; 740 ptcwakeup(tp, FREAD); 741 } 742 return (0); 743 } 744 error = ENOTTY; 745 } 746 /* 747 * If external processing and packet mode send ioctl packet. 748 */ 749 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 750 switch(cmd) { 751 case TIOCSETA: 752 case TIOCSETAW: 753 case TIOCSETAF: 754#ifdef COMPAT_43 755 case TIOCSETP: 756 case TIOCSETN: 757#endif 758#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 759 case TIOCSETC: 760 case TIOCSLTC: 761 case TIOCLBIS: 762 case TIOCLBIC: 763 case TIOCLSET: 764#endif 765 pti->pt_send |= TIOCPKT_IOCTL; 766 ptcwakeup(tp, FREAD); 767 default: 768 break; 769 } 770 } 771 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 772 && CCEQ(cc[VSTART], CTRL('q')); 773 if (pti->pt_flags & PF_NOSTOP) { 774 if (stop) { 775 pti->pt_send &= ~TIOCPKT_NOSTOP; 776 pti->pt_send |= TIOCPKT_DOSTOP; 777 pti->pt_flags &= ~PF_NOSTOP; 778 ptcwakeup(tp, FREAD); 779 } 780 } else { 781 if (!stop) { 782 pti->pt_send &= ~TIOCPKT_DOSTOP; 783 pti->pt_send |= TIOCPKT_NOSTOP; 784 pti->pt_flags |= PF_NOSTOP; 785 ptcwakeup(tp, FREAD); 786 } 787 } 788 return (error); 789} 790 791static ptc_devsw_installed = 0; 792 793static void ptc_drvinit __P((void *unused)); 794static void 795ptc_drvinit(unused) 796 void *unused; 797{ 798#ifdef DEVFS 799 int i,j,k; 800#endif 801 dev_t dev; 802 803 if( ! ptc_devsw_installed ) { 804 dev = makedev(CDEV_MAJOR_S, 0); 805 cdevsw_add(&dev, &pts_cdevsw, NULL); 806 dev = makedev(CDEV_MAJOR_C, 0); 807 cdevsw_add(&dev, &ptc_cdevsw, NULL); 808 ptc_devsw_installed = 1; 809#ifdef DEVFS 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