1 /*- 2 * Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Portions of this software were developed under sponsorship from Snow 6 * B.V., the Netherlands. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_compat.h" 34 35 #include <sys/param.h> 36 #include <sys/conf.h> 37 #include <sys/cons.h> 38 #include <sys/fcntl.h> 39 #include <sys/file.h> 40 #include <sys/filedesc.h> 41 #include <sys/filio.h> 42 #ifdef COMPAT_43TTY 43 #include <sys/ioctl_compat.h> 44 #endif /* COMPAT_43TTY */ 45 #include <sys/kernel.h> 46 #include <sys/limits.h> 47 #include <sys/malloc.h> 48 #include <sys/mount.h> 49 #include <sys/poll.h> 50 #include <sys/priv.h> 51 #include <sys/proc.h> 52 #include <sys/serial.h> 53 #include <sys/signal.h> 54 #include <sys/stat.h> 55 #include <sys/sx.h> 56 #include <sys/sysctl.h> 57 #include <sys/systm.h> 58 #include <sys/tty.h> 59 #include <sys/ttycom.h> 60 #define TTYDEFCHARS 61 #include <sys/ttydefaults.h> 62 #undef TTYDEFCHARS 63 #include <sys/ucred.h> 64 #include <sys/vnode.h> 65 66 #include <machine/stdarg.h> 67 68 static MALLOC_DEFINE(M_TTY, "tty", "tty device"); 69 70 static void tty_rel_free(struct tty *tp); 71 72 static TAILQ_HEAD(, tty) tty_list = TAILQ_HEAD_INITIALIZER(tty_list); 73 static struct sx tty_list_sx; 74 SX_SYSINIT(tty_list, &tty_list_sx, "tty list"); 75 static unsigned int tty_list_count = 0; 76 77 /* Character device of /dev/console. */ 78 static struct cdev *dev_console; 79 static const char *dev_console_filename; 80 81 /* 82 * Flags that are supported and stored by this implementation. 83 */ 84 #define TTYSUP_IFLAG (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|ISTRIP|\ 85 INLCR|IGNCR|ICRNL|IXON|IXOFF|IXANY|IMAXBEL) 86 #define TTYSUP_OFLAG (OPOST|ONLCR|TAB3|ONOEOT|OCRNL|ONOCR|ONLRET) 87 #define TTYSUP_LFLAG (ECHOKE|ECHOE|ECHOK|ECHO|ECHONL|ECHOPRT|\ 88 ECHOCTL|ISIG|ICANON|ALTWERASE|IEXTEN|TOSTOP|\ 89 FLUSHO|NOKERNINFO|NOFLSH) 90 #define TTYSUP_CFLAG (CIGNORE|CSIZE|CSTOPB|CREAD|PARENB|PARODD|\ 91 HUPCL|CLOCAL|CCTS_OFLOW|CRTS_IFLOW|CDTR_IFLOW|\ 92 CDSR_OFLOW|CCAR_OFLOW) 93 94 #define TTY_CALLOUT(tp,d) ((d) != (tp)->t_dev && (d) != dev_console) 95 96 /* 97 * Set TTY buffer sizes. 98 */ 99 100 #define TTYBUF_MAX 65536 101 102 static void 103 tty_watermarks(struct tty *tp) 104 { 105 size_t bs; 106 107 /* Provide an input buffer for 0.2 seconds of data. */ 108 bs = MIN(tp->t_termios.c_ispeed / 5, TTYBUF_MAX); 109 ttyinq_setsize(&tp->t_inq, tp, bs); 110 111 /* Set low watermark at 10% (when 90% is available). */ 112 tp->t_inlow = (ttyinq_getsize(&tp->t_inq) * 9) / 10; 113 114 /* Provide an ouput buffer for 0.2 seconds of data. */ 115 bs = MIN(tp->t_termios.c_ospeed / 5, TTYBUF_MAX); 116 ttyoutq_setsize(&tp->t_outq, tp, bs); 117 118 /* Set low watermark at 10% (when 90% is available). */ 119 tp->t_outlow = (ttyoutq_getsize(&tp->t_outq) * 9) / 10; 120 } 121 122 static int 123 tty_drain(struct tty *tp) 124 { 125 int error; 126 127 if (ttyhook_hashook(tp, getc_inject)) 128 /* buffer is inaccessible */ 129 return (0); 130 131 while (ttyoutq_bytesused(&tp->t_outq) > 0) { 132 ttydevsw_outwakeup(tp); 133 /* Could be handled synchronously. */ 134 if (ttyoutq_bytesused(&tp->t_outq) == 0) 135 return (0); 136 137 /* Wait for data to be drained. */ 138 error = tty_wait(tp, &tp->t_outwait); 139 if (error) 140 return (error); 141 } 142 143 return (0); 144 } 145 146 /* 147 * Though ttydev_enter() and ttydev_leave() seem to be related, they 148 * don't have to be used together. ttydev_enter() is used by the cdev 149 * operations to prevent an actual operation from being processed when 150 * the TTY has been abandoned. ttydev_leave() is used by ttydev_open() 151 * and ttydev_close() to determine whether per-TTY data should be 152 * deallocated. 153 */ 154 155 static __inline int 156 ttydev_enter(struct tty *tp) 157 { 158 tty_lock(tp); 159 160 if (tty_gone(tp) || !tty_opened(tp)) { 161 /* Device is already gone. */ 162 tty_unlock(tp); 163 return (ENXIO); 164 } 165 166 return (0); 167 } 168 169 static void 170 ttydev_leave(struct tty *tp) 171 { 172 tty_lock_assert(tp, MA_OWNED); 173 174 if (tty_opened(tp) || tp->t_flags & TF_OPENCLOSE) { 175 /* Device is still opened somewhere. */ 176 tty_unlock(tp); 177 return; 178 } 179 180 tp->t_flags |= TF_OPENCLOSE; 181 182 /* Stop asynchronous I/O. */ 183 funsetown(&tp->t_sigio); 184 185 /* Remove console TTY. */ 186 if (constty == tp) 187 constty_clear(); 188 189 /* Drain any output. */ 190 MPASS((tp->t_flags & TF_STOPPED) == 0); 191 if (!tty_gone(tp)) 192 tty_drain(tp); 193 194 ttydisc_close(tp); 195 196 /* Destroy associated buffers already. */ 197 ttyinq_free(&tp->t_inq); 198 tp->t_inlow = 0; 199 ttyoutq_free(&tp->t_outq); 200 tp->t_outlow = 0; 201 202 knlist_clear(&tp->t_inpoll.si_note, 1); 203 knlist_clear(&tp->t_outpoll.si_note, 1); 204 205 if (!tty_gone(tp)) 206 ttydevsw_close(tp); 207 208 tp->t_flags &= ~TF_OPENCLOSE; 209 cv_broadcast(&tp->t_dcdwait); 210 tty_rel_free(tp); 211 } 212 213 /* 214 * Operations that are exposed through the character device in /dev. 215 */ 216 static int 217 ttydev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 218 { 219 struct tty *tp = dev->si_drv1; 220 int error = 0; 221 222 tty_lock(tp); 223 if (tty_gone(tp)) { 224 /* Device is already gone. */ 225 tty_unlock(tp); 226 return (ENXIO); 227 } 228 229 /* 230 * Block when other processes are currently opening or closing 231 * the TTY. 232 */ 233 while (tp->t_flags & TF_OPENCLOSE) { 234 error = tty_wait(tp, &tp->t_dcdwait); 235 if (error != 0) { 236 tty_unlock(tp); 237 return (error); 238 } 239 } 240 tp->t_flags |= TF_OPENCLOSE; 241 242 /* 243 * Make sure the "tty" and "cua" device cannot be opened at the 244 * same time. 245 */ 246 if (TTY_CALLOUT(tp, dev)) { 247 if (tp->t_flags & TF_OPENED_IN) { 248 error = EBUSY; 249 goto done; 250 } 251 } else { 252 if (tp->t_flags & TF_OPENED_OUT) { 253 error = EBUSY; 254 goto done; 255 } 256 } 257 258 if (tp->t_flags & TF_EXCLUDE && priv_check(td, PRIV_TTY_EXCLUSIVE)) { 259 error = EBUSY; 260 goto done; 261 } 262 263 if (!tty_opened(tp)) { 264 /* Set proper termios flags. */ 265 if (TTY_CALLOUT(tp, dev)) { 266 tp->t_termios = tp->t_termios_init_out; 267 } else { 268 tp->t_termios = tp->t_termios_init_in; 269 } 270 ttydevsw_param(tp, &tp->t_termios); 271 272 ttydevsw_modem(tp, SER_DTR|SER_RTS, 0); 273 274 error = ttydevsw_open(tp); 275 if (error != 0) 276 goto done; 277 278 ttydisc_open(tp); 279 tty_watermarks(tp); 280 } 281 282 /* Wait for Carrier Detect. */ 283 if (!TTY_CALLOUT(tp, dev) && (oflags & O_NONBLOCK) == 0 && 284 (tp->t_termios.c_cflag & CLOCAL) == 0) { 285 while ((ttydevsw_modem(tp, 0, 0) & SER_DCD) == 0) { 286 error = tty_wait(tp, &tp->t_dcdwait); 287 if (error != 0) 288 goto done; 289 } 290 } 291 292 if (dev == dev_console) 293 tp->t_flags |= TF_OPENED_CONS; 294 else if (TTY_CALLOUT(tp, dev)) 295 tp->t_flags |= TF_OPENED_OUT; 296 else 297 tp->t_flags |= TF_OPENED_IN; 298 299 done: tp->t_flags &= ~TF_OPENCLOSE; 300 cv_broadcast(&tp->t_dcdwait); 301 ttydev_leave(tp); 302 303 return (error); 304 } 305 306 static int 307 ttydev_close(struct cdev *dev, int fflag, int devtype, struct thread *td) 308 { 309 struct tty *tp = dev->si_drv1; 310 311 tty_lock(tp); 312 313 /* 314 * Don't actually close the device if it is being used as the 315 * console. 316 */ 317 MPASS((tp->t_flags & TF_OPENED) != TF_OPENED); 318 if (dev == dev_console) 319 tp->t_flags &= ~TF_OPENED_CONS; 320 else 321 tp->t_flags &= ~(TF_OPENED_IN|TF_OPENED_OUT); 322 323 if (tp->t_flags & TF_OPENED) { 324 tty_unlock(tp); 325 return (0); 326 } 327 328 /* 329 * This can only be called once. The callin and the callout 330 * devices cannot be opened at the same time. 331 */ 332 tp->t_flags &= ~(TF_EXCLUDE|TF_STOPPED); 333 334 /* Properly wake up threads that are stuck - revoke(). */ 335 tp->t_revokecnt++; 336 tty_wakeup(tp, FREAD|FWRITE); 337 cv_broadcast(&tp->t_bgwait); 338 cv_broadcast(&tp->t_dcdwait); 339 340 ttydev_leave(tp); 341 342 return (0); 343 } 344 345 static __inline int 346 tty_is_ctty(struct tty *tp, struct proc *p) 347 { 348 tty_lock_assert(tp, MA_OWNED); 349 350 return (p->p_session == tp->t_session && p->p_flag & P_CONTROLT); 351 } 352 353 static int 354 tty_wait_background(struct tty *tp, struct thread *td, int sig) 355 { 356 struct proc *p = td->td_proc; 357 struct pgrp *pg; 358 int error; 359 360 MPASS(sig == SIGTTIN || sig == SIGTTOU); 361 tty_lock_assert(tp, MA_OWNED); 362 363 for (;;) { 364 PROC_LOCK(p); 365 /* 366 * The process should only sleep, when: 367 * - This terminal is the controling terminal 368 * - Its process group is not the foreground process 369 * group 370 * - The parent process isn't waiting for the child to 371 * exit 372 * - the signal to send to the process isn't masked 373 */ 374 if (!tty_is_ctty(tp, p) || p->p_pgrp == tp->t_pgrp) { 375 /* Allow the action to happen. */ 376 PROC_UNLOCK(p); 377 return (0); 378 } 379 380 if (SIGISMEMBER(p->p_sigacts->ps_sigignore, sig) || 381 SIGISMEMBER(td->td_sigmask, sig)) { 382 /* Only allow them in write()/ioctl(). */ 383 PROC_UNLOCK(p); 384 return (sig == SIGTTOU ? 0 : EIO); 385 } 386 387 pg = p->p_pgrp; 388 if (p->p_flag & P_PPWAIT || pg->pg_jobc == 0) { 389 /* Don't allow the action to happen. */ 390 PROC_UNLOCK(p); 391 return (EIO); 392 } 393 PROC_UNLOCK(p); 394 395 /* 396 * Send the signal and sleep until we're the new 397 * foreground process group. 398 */ 399 PGRP_LOCK(pg); 400 pgsignal(pg, sig, 1); 401 PGRP_UNLOCK(pg); 402 403 error = tty_wait(tp, &tp->t_bgwait); 404 if (error) 405 return (error); 406 } 407 } 408 409 static int 410 ttydev_read(struct cdev *dev, struct uio *uio, int ioflag) 411 { 412 struct tty *tp = dev->si_drv1; 413 int error; 414 415 error = ttydev_enter(tp); 416 if (error) 417 goto done; 418 419 error = tty_wait_background(tp, curthread, SIGTTIN); 420 if (error) { 421 tty_unlock(tp); 422 goto done; 423 } 424 425 error = ttydisc_read(tp, uio, ioflag); 426 tty_unlock(tp); 427 428 /* 429 * The read() call should not throw an error when the device is 430 * being destroyed. Silently convert it to an EOF. 431 */ 432 done: if (error == ENXIO) 433 error = 0; 434 return (error); 435 } 436 437 static int 438 ttydev_write(struct cdev *dev, struct uio *uio, int ioflag) 439 { 440 struct tty *tp = dev->si_drv1; 441 int error; 442 443 error = ttydev_enter(tp); 444 if (error) 445 return (error); 446 447 if (tp->t_termios.c_lflag & TOSTOP) { 448 error = tty_wait_background(tp, curthread, SIGTTOU); 449 if (error) 450 goto done; 451 } 452 453 if (ioflag & IO_NDELAY && tp->t_flags & TF_BUSY_OUT) { 454 /* Allow non-blocking writes to bypass serialization. */ 455 error = ttydisc_write(tp, uio, ioflag); 456 } else { 457 /* Serialize write() calls. */ 458 while (tp->t_flags & TF_BUSY_OUT) { 459 error = tty_wait(tp, &tp->t_outserwait); 460 if (error) 461 goto done; 462 } 463 464 tp->t_flags |= TF_BUSY_OUT; 465 error = ttydisc_write(tp, uio, ioflag); 466 tp->t_flags &= ~TF_BUSY_OUT; 467 cv_signal(&tp->t_outserwait); 468 } 469 470 done: tty_unlock(tp); 471 return (error); 472 } 473 474 static int 475 ttydev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, 476 struct thread *td) 477 { 478 struct tty *tp = dev->si_drv1; 479 int error; 480 481 error = ttydev_enter(tp); 482 if (error) 483 return (error); 484 485 switch (cmd) { 486 case TIOCCBRK: 487 case TIOCCONS: 488 case TIOCDRAIN: 489 case TIOCEXCL: 490 case TIOCFLUSH: 491 case TIOCNXCL: 492 case TIOCSBRK: 493 case TIOCSCTTY: 494 case TIOCSETA: 495 case TIOCSETAF: 496 case TIOCSETAW: 497 case TIOCSPGRP: 498 case TIOCSTART: 499 case TIOCSTAT: 500 case TIOCSTOP: 501 case TIOCSWINSZ: 502 #if 0 503 case TIOCSDRAINWAIT: 504 case TIOCSETD: 505 case TIOCSTI: 506 #endif 507 #ifdef COMPAT_43TTY 508 case TIOCLBIC: 509 case TIOCLBIS: 510 case TIOCLSET: 511 case TIOCSETC: 512 case OTIOCSETD: 513 case TIOCSETN: 514 case TIOCSETP: 515 case TIOCSLTC: 516 #endif /* COMPAT_43TTY */ 517 /* 518 * If the ioctl() causes the TTY to be modified, let it 519 * wait in the background. 520 */ 521 error = tty_wait_background(tp, curthread, SIGTTOU); 522 if (error) 523 goto done; 524 } 525 526 error = tty_ioctl(tp, cmd, data, td); 527 done: tty_unlock(tp); 528 529 return (error); 530 } 531 532 static int 533 ttydev_poll(struct cdev *dev, int events, struct thread *td) 534 { 535 struct tty *tp = dev->si_drv1; 536 int error, revents = 0; 537 538 error = ttydev_enter(tp); 539 if (error) 540 return ((events & (POLLIN|POLLRDNORM)) | POLLHUP); 541 542 if (events & (POLLIN|POLLRDNORM)) { 543 /* See if we can read something. */ 544 if (ttydisc_read_poll(tp) > 0) 545 revents |= events & (POLLIN|POLLRDNORM); 546 } 547 548 if (tp->t_flags & TF_ZOMBIE) { 549 /* Hangup flag on zombie state. */ 550 revents |= POLLHUP; 551 } else if (events & (POLLOUT|POLLWRNORM)) { 552 /* See if we can write something. */ 553 if (ttydisc_write_poll(tp) > 0) 554 revents |= events & (POLLOUT|POLLWRNORM); 555 } 556 557 if (revents == 0) { 558 if (events & (POLLIN|POLLRDNORM)) 559 selrecord(td, &tp->t_inpoll); 560 if (events & (POLLOUT|POLLWRNORM)) 561 selrecord(td, &tp->t_outpoll); 562 } 563 564 tty_unlock(tp); 565 566 return (revents); 567 } 568 569 static int 570 ttydev_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot) 571 { 572 struct tty *tp = dev->si_drv1; 573 int error; 574 575 /* Handle mmap() through the driver. */ 576 577 error = ttydev_enter(tp); 578 if (error) 579 return (-1); 580 error = ttydevsw_mmap(tp, offset, paddr, nprot); 581 tty_unlock(tp); 582 583 return (error); 584 } 585 586 /* 587 * kqueue support. 588 */ 589 590 static void 591 tty_kqops_read_detach(struct knote *kn) 592 { 593 struct tty *tp = kn->kn_hook; 594 595 knlist_remove(&tp->t_inpoll.si_note, kn, 0); 596 } 597 598 static int 599 tty_kqops_read_event(struct knote *kn, long hint) 600 { 601 struct tty *tp = kn->kn_hook; 602 603 tty_lock_assert(tp, MA_OWNED); 604 605 if (tty_gone(tp) || tp->t_flags & TF_ZOMBIE) { 606 kn->kn_flags |= EV_EOF; 607 return (1); 608 } else { 609 kn->kn_data = ttydisc_read_poll(tp); 610 return (kn->kn_data > 0); 611 } 612 } 613 614 static void 615 tty_kqops_write_detach(struct knote *kn) 616 { 617 struct tty *tp = kn->kn_hook; 618 619 knlist_remove(&tp->t_outpoll.si_note, kn, 0); 620 } 621 622 static int 623 tty_kqops_write_event(struct knote *kn, long hint) 624 { 625 struct tty *tp = kn->kn_hook; 626 627 tty_lock_assert(tp, MA_OWNED); 628 629 if (tty_gone(tp)) { 630 kn->kn_flags |= EV_EOF; 631 return (1); 632 } else { 633 kn->kn_data = ttydisc_write_poll(tp); 634 return (kn->kn_data > 0); 635 } 636 } 637 638 static struct filterops tty_kqops_read = 639 { 1, NULL, tty_kqops_read_detach, tty_kqops_read_event }; 640 static struct filterops tty_kqops_write = 641 { 1, NULL, tty_kqops_write_detach, tty_kqops_write_event }; 642 643 static int 644 ttydev_kqfilter(struct cdev *dev, struct knote *kn) 645 { 646 struct tty *tp = dev->si_drv1; 647 int error; 648 649 error = ttydev_enter(tp); 650 if (error) 651 return (error); 652 653 switch (kn->kn_filter) { 654 case EVFILT_READ: 655 kn->kn_hook = tp; 656 kn->kn_fop = &tty_kqops_read; 657 knlist_add(&tp->t_inpoll.si_note, kn, 1); 658 break; 659 case EVFILT_WRITE: 660 kn->kn_hook = tp; 661 kn->kn_fop = &tty_kqops_write; 662 knlist_add(&tp->t_outpoll.si_note, kn, 1); 663 break; 664 default: 665 error = EINVAL; 666 break; 667 } 668 669 tty_unlock(tp); 670 return (error); 671 } 672 673 static struct cdevsw ttydev_cdevsw = { 674 .d_version = D_VERSION, 675 .d_open = ttydev_open, 676 .d_close = ttydev_close, 677 .d_read = ttydev_read, 678 .d_write = ttydev_write, 679 .d_ioctl = ttydev_ioctl, 680 .d_kqfilter = ttydev_kqfilter, 681 .d_poll = ttydev_poll, 682 .d_mmap = ttydev_mmap, 683 .d_name = "ttydev", 684 .d_flags = D_TTY, 685 }; 686 687 /* 688 * Init/lock-state devices 689 */ 690 691 static int 692 ttyil_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 693 { 694 struct tty *tp = dev->si_drv1; 695 int error = 0; 696 697 tty_lock(tp); 698 if (tty_gone(tp)) 699 error = ENODEV; 700 tty_unlock(tp); 701 702 return (error); 703 } 704 705 static int 706 ttyil_close(struct cdev *dev, int flag, int mode, struct thread *td) 707 { 708 return (0); 709 } 710 711 static int 712 ttyil_rdwr(struct cdev *dev, struct uio *uio, int ioflag) 713 { 714 return (ENODEV); 715 } 716 717 static int 718 ttyil_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, 719 struct thread *td) 720 { 721 struct tty *tp = dev->si_drv1; 722 int error = 0; 723 724 tty_lock(tp); 725 if (tty_gone(tp)) { 726 error = ENODEV; 727 goto done; 728 } 729 730 switch (cmd) { 731 case TIOCGETA: 732 /* Obtain terminal flags through tcgetattr(). */ 733 *(struct termios*)data = *(struct termios*)dev->si_drv2; 734 break; 735 case TIOCSETA: 736 /* Set terminal flags through tcsetattr(). */ 737 error = priv_check(td, PRIV_TTY_SETA); 738 if (error) 739 break; 740 *(struct termios*)dev->si_drv2 = *(struct termios*)data; 741 break; 742 case TIOCGETD: 743 *(int *)data = TTYDISC; 744 break; 745 case TIOCGWINSZ: 746 bzero(data, sizeof(struct winsize)); 747 break; 748 default: 749 error = ENOTTY; 750 } 751 752 done: tty_unlock(tp); 753 return (error); 754 } 755 756 static struct cdevsw ttyil_cdevsw = { 757 .d_version = D_VERSION, 758 .d_open = ttyil_open, 759 .d_close = ttyil_close, 760 .d_read = ttyil_rdwr, 761 .d_write = ttyil_rdwr, 762 .d_ioctl = ttyil_ioctl, 763 .d_name = "ttyil", 764 .d_flags = D_TTY, 765 }; 766 767 static void 768 tty_init_termios(struct tty *tp) 769 { 770 struct termios *t = &tp->t_termios_init_in; 771 772 t->c_cflag = TTYDEF_CFLAG; 773 t->c_iflag = TTYDEF_IFLAG; 774 t->c_lflag = TTYDEF_LFLAG; 775 t->c_oflag = TTYDEF_OFLAG; 776 t->c_ispeed = TTYDEF_SPEED; 777 t->c_ospeed = TTYDEF_SPEED; 778 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars); 779 780 tp->t_termios_init_out = *t; 781 } 782 783 void 784 tty_init_console(struct tty *tp, speed_t s) 785 { 786 struct termios *ti = &tp->t_termios_init_in; 787 struct termios *to = &tp->t_termios_init_out; 788 789 if (s != 0) { 790 ti->c_ispeed = ti->c_ospeed = s; 791 to->c_ispeed = to->c_ospeed = s; 792 } 793 794 ti->c_cflag |= CLOCAL; 795 to->c_cflag |= CLOCAL; 796 } 797 798 /* 799 * Standard device routine implementations, mostly meant for 800 * pseudo-terminal device drivers. When a driver creates a new terminal 801 * device class, missing routines are patched. 802 */ 803 804 static int 805 ttydevsw_defopen(struct tty *tp) 806 { 807 808 return (0); 809 } 810 811 static void 812 ttydevsw_defclose(struct tty *tp) 813 { 814 } 815 816 static void 817 ttydevsw_defoutwakeup(struct tty *tp) 818 { 819 820 panic("Terminal device has output, while not implemented"); 821 } 822 823 static void 824 ttydevsw_definwakeup(struct tty *tp) 825 { 826 } 827 828 static int 829 ttydevsw_defioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td) 830 { 831 832 return (ENOIOCTL); 833 } 834 835 static int 836 ttydevsw_defparam(struct tty *tp, struct termios *t) 837 { 838 839 /* Use a fake baud rate, we're not a real device. */ 840 t->c_ispeed = t->c_ospeed = TTYDEF_SPEED; 841 842 return (0); 843 } 844 845 static int 846 ttydevsw_defmodem(struct tty *tp, int sigon, int sigoff) 847 { 848 849 /* Simulate a carrier to make the TTY layer happy. */ 850 return (SER_DCD); 851 } 852 853 static int 854 ttydevsw_defmmap(struct tty *tp, vm_offset_t offset, vm_paddr_t *paddr, 855 int nprot) 856 { 857 858 return (-1); 859 } 860 861 static void 862 ttydevsw_defpktnotify(struct tty *tp, char event) 863 { 864 } 865 866 static void 867 ttydevsw_deffree(void *softc) 868 { 869 870 panic("Terminal device freed without a free-handler"); 871 } 872 873 /* 874 * TTY allocation and deallocation. TTY devices can be deallocated when 875 * the driver doesn't use it anymore, when the TTY isn't a session's 876 * controlling TTY and when the device node isn't opened through devfs. 877 */ 878 879 struct tty * 880 tty_alloc(struct ttydevsw *tsw, void *sc) 881 { 882 883 return (tty_alloc_mutex(tsw, sc, NULL)); 884 } 885 886 struct tty * 887 tty_alloc_mutex(struct ttydevsw *tsw, void *sc, struct mtx *mutex) 888 { 889 struct tty *tp; 890 891 /* Make sure the driver defines all routines. */ 892 #define PATCH_FUNC(x) do { \ 893 if (tsw->tsw_ ## x == NULL) \ 894 tsw->tsw_ ## x = ttydevsw_def ## x; \ 895 } while (0) 896 PATCH_FUNC(open); 897 PATCH_FUNC(close); 898 PATCH_FUNC(outwakeup); 899 PATCH_FUNC(inwakeup); 900 PATCH_FUNC(ioctl); 901 PATCH_FUNC(param); 902 PATCH_FUNC(modem); 903 PATCH_FUNC(mmap); 904 PATCH_FUNC(pktnotify); 905 PATCH_FUNC(free); 906 #undef PATCH_FUNC 907 908 tp = malloc(sizeof(struct tty), M_TTY, M_WAITOK|M_ZERO); 909 tp->t_devsw = tsw; 910 tp->t_devswsoftc = sc; 911 tp->t_flags = tsw->tsw_flags; 912 913 tty_init_termios(tp); 914 915 cv_init(&tp->t_inwait, "ttyin"); 916 cv_init(&tp->t_outwait, "ttyout"); 917 cv_init(&tp->t_outserwait, "ttyosr"); 918 cv_init(&tp->t_bgwait, "ttybg"); 919 cv_init(&tp->t_dcdwait, "ttydcd"); 920 921 /* Allow drivers to use a custom mutex to lock the TTY. */ 922 if (mutex != NULL) { 923 tp->t_mtx = mutex; 924 } else { 925 tp->t_mtx = &tp->t_mtxobj; 926 mtx_init(&tp->t_mtxobj, "ttymtx", NULL, MTX_DEF); 927 } 928 929 knlist_init_mtx(&tp->t_inpoll.si_note, tp->t_mtx); 930 knlist_init_mtx(&tp->t_outpoll.si_note, tp->t_mtx); 931 932 sx_xlock(&tty_list_sx); 933 TAILQ_INSERT_TAIL(&tty_list, tp, t_list); 934 tty_list_count++; 935 sx_xunlock(&tty_list_sx); 936 937 return (tp); 938 } 939 940 static void 941 tty_dealloc(void *arg) 942 { 943 struct tty *tp = arg; 944 945 sx_xlock(&tty_list_sx); 946 TAILQ_REMOVE(&tty_list, tp, t_list); 947 tty_list_count--; 948 sx_xunlock(&tty_list_sx); 949 950 /* Make sure we haven't leaked buffers. */ 951 MPASS(ttyinq_getsize(&tp->t_inq) == 0); 952 MPASS(ttyoutq_getsize(&tp->t_outq) == 0); 953 954 knlist_destroy(&tp->t_inpoll.si_note); 955 knlist_destroy(&tp->t_outpoll.si_note); 956 957 cv_destroy(&tp->t_inwait); 958 cv_destroy(&tp->t_outwait); 959 cv_destroy(&tp->t_bgwait); 960 cv_destroy(&tp->t_dcdwait); 961 cv_destroy(&tp->t_outserwait); 962 963 if (tp->t_mtx == &tp->t_mtxobj) 964 mtx_destroy(&tp->t_mtxobj); 965 ttydevsw_free(tp); 966 free(tp, M_TTY); 967 } 968 969 static void 970 tty_rel_free(struct tty *tp) 971 { 972 struct cdev *dev; 973 974 tty_lock_assert(tp, MA_OWNED); 975 976 #define TF_ACTIVITY (TF_GONE|TF_OPENED|TF_HOOK|TF_OPENCLOSE) 977 if (tp->t_sessioncnt != 0 || (tp->t_flags & TF_ACTIVITY) != TF_GONE) { 978 /* TTY is still in use. */ 979 tty_unlock(tp); 980 return; 981 } 982 983 /* TTY can be deallocated. */ 984 dev = tp->t_dev; 985 tp->t_dev = NULL; 986 tty_unlock(tp); 987 988 destroy_dev_sched_cb(dev, tty_dealloc, tp); 989 } 990 991 void 992 tty_rel_pgrp(struct tty *tp, struct pgrp *pg) 993 { 994 MPASS(tp->t_sessioncnt > 0); 995 tty_lock_assert(tp, MA_OWNED); 996 997 if (tp->t_pgrp == pg) 998 tp->t_pgrp = NULL; 999 1000 tty_unlock(tp); 1001 } 1002 1003 void 1004 tty_rel_sess(struct tty *tp, struct session *sess) 1005 { 1006 MPASS(tp->t_sessioncnt > 0); 1007 1008 /* Current session has left. */ 1009 if (tp->t_session == sess) { 1010 tp->t_session = NULL; 1011 MPASS(tp->t_pgrp == NULL); 1012 } 1013 tp->t_sessioncnt--; 1014 tty_rel_free(tp); 1015 } 1016 1017 void 1018 tty_rel_gone(struct tty *tp) 1019 { 1020 MPASS(!tty_gone(tp)); 1021 1022 /* Simulate carrier removal. */ 1023 ttydisc_modem(tp, 0); 1024 1025 /* Wake up all blocked threads. */ 1026 tty_wakeup(tp, FREAD|FWRITE); 1027 cv_broadcast(&tp->t_bgwait); 1028 cv_broadcast(&tp->t_dcdwait); 1029 1030 tp->t_flags |= TF_GONE; 1031 tty_rel_free(tp); 1032 } 1033 1034 /* 1035 * Exposing information about current TTY's through sysctl 1036 */ 1037 1038 static void 1039 tty_to_xtty(struct tty *tp, struct xtty *xt) 1040 { 1041 tty_lock_assert(tp, MA_OWNED); 1042 1043 xt->xt_size = sizeof(struct xtty); 1044 xt->xt_insize = ttyinq_getsize(&tp->t_inq); 1045 xt->xt_incc = ttyinq_bytescanonicalized(&tp->t_inq); 1046 xt->xt_inlc = ttyinq_bytesline(&tp->t_inq); 1047 xt->xt_inlow = tp->t_inlow; 1048 xt->xt_outsize = ttyoutq_getsize(&tp->t_outq); 1049 xt->xt_outcc = ttyoutq_bytesused(&tp->t_outq); 1050 xt->xt_outlow = tp->t_outlow; 1051 xt->xt_column = tp->t_column; 1052 xt->xt_pgid = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 1053 xt->xt_sid = tp->t_session ? tp->t_session->s_sid : 0; 1054 xt->xt_flags = tp->t_flags; 1055 xt->xt_dev = tp->t_dev ? dev2udev(tp->t_dev) : NODEV; 1056 } 1057 1058 static int 1059 sysctl_kern_ttys(SYSCTL_HANDLER_ARGS) 1060 { 1061 unsigned long lsize; 1062 struct xtty *xtlist, *xt; 1063 struct tty *tp; 1064 int error; 1065 1066 sx_slock(&tty_list_sx); 1067 lsize = tty_list_count * sizeof(struct xtty); 1068 if (lsize == 0) { 1069 sx_sunlock(&tty_list_sx); 1070 return (0); 1071 } 1072 1073 xtlist = xt = malloc(lsize, M_TTY, M_WAITOK); 1074 1075 TAILQ_FOREACH(tp, &tty_list, t_list) { 1076 tty_lock(tp); 1077 tty_to_xtty(tp, xt); 1078 tty_unlock(tp); 1079 xt++; 1080 } 1081 sx_sunlock(&tty_list_sx); 1082 1083 error = SYSCTL_OUT(req, xtlist, lsize); 1084 free(xtlist, M_TTY); 1085 return (error); 1086 } 1087 1088 SYSCTL_PROC(_kern, OID_AUTO, ttys, CTLTYPE_OPAQUE|CTLFLAG_RD|CTLFLAG_MPSAFE, 1089 0, 0, sysctl_kern_ttys, "S,xtty", "List of TTYs"); 1090 1091 /* 1092 * Device node creation. Device has been set up, now we can expose it to 1093 * the user. 1094 */ 1095 1096 void 1097 tty_makedev(struct tty *tp, struct ucred *cred, const char *fmt, ...) 1098 { 1099 va_list ap; 1100 struct cdev *dev; 1101 const char *prefix = "tty"; 1102 char name[SPECNAMELEN - 3]; /* for "tty" and "cua". */ 1103 uid_t uid; 1104 gid_t gid; 1105 mode_t mode; 1106 1107 /* Remove "tty" prefix from devices like PTY's. */ 1108 if (tp->t_flags & TF_NOPREFIX) 1109 prefix = ""; 1110 1111 va_start(ap, fmt); 1112 vsnrprintf(name, sizeof name, 32, fmt, ap); 1113 va_end(ap); 1114 1115 if (cred == NULL) { 1116 /* System device. */ 1117 uid = UID_ROOT; 1118 gid = GID_WHEEL; 1119 mode = S_IRUSR|S_IWUSR; 1120 } else { 1121 /* User device. */ 1122 uid = cred->cr_ruid; 1123 gid = GID_TTY; 1124 mode = S_IRUSR|S_IWUSR|S_IWGRP; 1125 } 1126 1127 /* Master call-in device. */ 1128 dev = make_dev_cred(&ttydev_cdevsw, 0, cred, 1129 uid, gid, mode, "%s%s", prefix, name); 1130 dev->si_drv1 = tp; 1131 tp->t_dev = dev; 1132 1133 /* Slave call-in devices. */ 1134 if (tp->t_flags & TF_INITLOCK) { 1135 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1136 uid, gid, mode, "%s%s.init", prefix, name); 1137 dev_depends(tp->t_dev, dev); 1138 dev->si_drv1 = tp; 1139 dev->si_drv2 = &tp->t_termios_init_in; 1140 1141 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1142 uid, gid, mode, "%s%s.lock", prefix, name); 1143 dev_depends(tp->t_dev, dev); 1144 dev->si_drv1 = tp; 1145 dev->si_drv2 = &tp->t_termios_lock_in; 1146 } 1147 1148 /* Call-out devices. */ 1149 if (tp->t_flags & TF_CALLOUT) { 1150 dev = make_dev_cred(&ttydev_cdevsw, 0, cred, 1151 UID_UUCP, GID_DIALER, 0660, "cua%s", name); 1152 dev_depends(tp->t_dev, dev); 1153 dev->si_drv1 = tp; 1154 1155 /* Slave call-out devices. */ 1156 if (tp->t_flags & TF_INITLOCK) { 1157 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1158 UID_UUCP, GID_DIALER, 0660, "cua%s.init", name); 1159 dev_depends(tp->t_dev, dev); 1160 dev->si_drv1 = tp; 1161 dev->si_drv2 = &tp->t_termios_init_out; 1162 1163 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1164 UID_UUCP, GID_DIALER, 0660, "cua%s.lock", name); 1165 dev_depends(tp->t_dev, dev); 1166 dev->si_drv1 = tp; 1167 dev->si_drv2 = &tp->t_termios_lock_out; 1168 } 1169 } 1170 } 1171 1172 /* 1173 * Signalling processes. 1174 */ 1175 1176 void 1177 tty_signal_sessleader(struct tty *tp, int sig) 1178 { 1179 struct proc *p; 1180 1181 tty_lock_assert(tp, MA_OWNED); 1182 MPASS(sig >= 1 && sig < NSIG); 1183 1184 /* Make signals start output again. */ 1185 tp->t_flags &= ~TF_STOPPED; 1186 1187 if (tp->t_session != NULL && tp->t_session->s_leader != NULL) { 1188 p = tp->t_session->s_leader; 1189 PROC_LOCK(p); 1190 psignal(p, sig); 1191 PROC_UNLOCK(p); 1192 } 1193 } 1194 1195 void 1196 tty_signal_pgrp(struct tty *tp, int sig) 1197 { 1198 tty_lock_assert(tp, MA_OWNED); 1199 MPASS(sig >= 1 && sig < NSIG); 1200 1201 /* Make signals start output again. */ 1202 tp->t_flags &= ~TF_STOPPED; 1203 1204 if (sig == SIGINFO && !(tp->t_termios.c_lflag & NOKERNINFO)) 1205 tty_info(tp); 1206 if (tp->t_pgrp != NULL) { 1207 PGRP_LOCK(tp->t_pgrp); 1208 pgsignal(tp->t_pgrp, sig, 1); 1209 PGRP_UNLOCK(tp->t_pgrp); 1210 } 1211 } 1212 1213 void 1214 tty_wakeup(struct tty *tp, int flags) 1215 { 1216 if (tp->t_flags & TF_ASYNC && tp->t_sigio != NULL) 1217 pgsigio(&tp->t_sigio, SIGIO, (tp->t_session != NULL)); 1218 1219 if (flags & FWRITE) { 1220 cv_broadcast(&tp->t_outwait); 1221 selwakeup(&tp->t_outpoll); 1222 KNOTE_LOCKED(&tp->t_outpoll.si_note, 0); 1223 } 1224 if (flags & FREAD) { 1225 cv_broadcast(&tp->t_inwait); 1226 selwakeup(&tp->t_inpoll); 1227 KNOTE_LOCKED(&tp->t_inpoll.si_note, 0); 1228 } 1229 } 1230 1231 int 1232 tty_wait(struct tty *tp, struct cv *cv) 1233 { 1234 int error; 1235 int revokecnt = tp->t_revokecnt; 1236 1237 tty_lock_assert(tp, MA_OWNED|MA_NOTRECURSED); 1238 MPASS(!tty_gone(tp)); 1239 1240 error = cv_wait_sig(cv, tp->t_mtx); 1241 1242 /* Restart the system call when we may have been revoked. */ 1243 if (tp->t_revokecnt != revokecnt) 1244 return (ERESTART); 1245 1246 /* Bail out when the device slipped away. */ 1247 if (tty_gone(tp)) 1248 return (ENXIO); 1249 1250 return (error); 1251 } 1252 1253 int 1254 tty_timedwait(struct tty *tp, struct cv *cv, int hz) 1255 { 1256 int error; 1257 int revokecnt = tp->t_revokecnt; 1258 1259 tty_lock_assert(tp, MA_OWNED|MA_NOTRECURSED); 1260 MPASS(!tty_gone(tp)); 1261 1262 error = cv_timedwait_sig(cv, tp->t_mtx, hz); 1263 1264 /* Restart the system call when we may have been revoked. */ 1265 if (tp->t_revokecnt != revokecnt) 1266 return (ERESTART); 1267 1268 /* Bail out when the device slipped away. */ 1269 if (tty_gone(tp)) 1270 return (ENXIO); 1271 1272 return (error); 1273 } 1274 1275 void 1276 tty_flush(struct tty *tp, int flags) 1277 { 1278 if (flags & FWRITE) { 1279 tp->t_flags &= ~TF_HIWAT_OUT; 1280 ttyoutq_flush(&tp->t_outq); 1281 tty_wakeup(tp, FWRITE); 1282 ttydevsw_pktnotify(tp, TIOCPKT_FLUSHWRITE); 1283 } 1284 if (flags & FREAD) { 1285 tty_hiwat_in_unblock(tp); 1286 ttyinq_flush(&tp->t_inq); 1287 ttydevsw_inwakeup(tp); 1288 ttydevsw_pktnotify(tp, TIOCPKT_FLUSHREAD); 1289 } 1290 } 1291 1292 static int 1293 tty_generic_ioctl(struct tty *tp, u_long cmd, void *data, struct thread *td) 1294 { 1295 int error; 1296 1297 switch (cmd) { 1298 /* 1299 * Modem commands. 1300 * The SER_* and TIOCM_* flags are the same, but one bit 1301 * shifted. I don't know why. 1302 */ 1303 case TIOCSDTR: 1304 ttydevsw_modem(tp, SER_DTR, 0); 1305 return (0); 1306 case TIOCCDTR: 1307 ttydevsw_modem(tp, 0, SER_DTR); 1308 return (0); 1309 case TIOCMSET: { 1310 int bits = *(int *)data; 1311 ttydevsw_modem(tp, 1312 (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1, 1313 ((~bits) & (TIOCM_DTR | TIOCM_RTS)) >> 1); 1314 return (0); 1315 } 1316 case TIOCMBIS: { 1317 int bits = *(int *)data; 1318 ttydevsw_modem(tp, (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1, 0); 1319 return (0); 1320 } 1321 case TIOCMBIC: { 1322 int bits = *(int *)data; 1323 ttydevsw_modem(tp, 0, (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1); 1324 return (0); 1325 } 1326 case TIOCMGET: 1327 *(int *)data = TIOCM_LE + (ttydevsw_modem(tp, 0, 0) << 1); 1328 return (0); 1329 1330 case FIOASYNC: 1331 if (*(int *)data) 1332 tp->t_flags |= TF_ASYNC; 1333 else 1334 tp->t_flags &= ~TF_ASYNC; 1335 return (0); 1336 case FIONBIO: 1337 /* This device supports non-blocking operation. */ 1338 return (0); 1339 case FIONREAD: 1340 *(int *)data = ttyinq_bytescanonicalized(&tp->t_inq); 1341 return (0); 1342 case FIONWRITE: 1343 case TIOCOUTQ: 1344 *(int *)data = ttyoutq_bytesused(&tp->t_outq); 1345 return (0); 1346 case FIOSETOWN: 1347 if (tp->t_session != NULL && !tty_is_ctty(tp, td->td_proc)) 1348 /* Not allowed to set ownership. */ 1349 return (ENOTTY); 1350 1351 /* Temporarily unlock the TTY to set ownership. */ 1352 tty_unlock(tp); 1353 error = fsetown(*(int *)data, &tp->t_sigio); 1354 tty_lock(tp); 1355 return (error); 1356 case FIOGETOWN: 1357 if (tp->t_session != NULL && !tty_is_ctty(tp, td->td_proc)) 1358 /* Not allowed to set ownership. */ 1359 return (ENOTTY); 1360 1361 /* Get ownership. */ 1362 *(int *)data = fgetown(&tp->t_sigio); 1363 return (0); 1364 case TIOCGETA: 1365 /* Obtain terminal flags through tcgetattr(). */ 1366 *(struct termios*)data = tp->t_termios; 1367 return (0); 1368 case TIOCSETA: 1369 case TIOCSETAW: 1370 case TIOCSETAF: { 1371 struct termios *t = data; 1372 1373 /* 1374 * Who makes up these funny rules? According to POSIX, 1375 * input baud rate is set equal to the output baud rate 1376 * when zero. 1377 */ 1378 if (t->c_ispeed == 0) 1379 t->c_ispeed = t->c_ospeed; 1380 1381 /* Discard any unsupported bits. */ 1382 t->c_iflag &= TTYSUP_IFLAG; 1383 t->c_oflag &= TTYSUP_OFLAG; 1384 t->c_lflag &= TTYSUP_LFLAG; 1385 t->c_cflag &= TTYSUP_CFLAG; 1386 1387 /* Set terminal flags through tcsetattr(). */ 1388 if (cmd == TIOCSETAW || cmd == TIOCSETAF) { 1389 error = tty_drain(tp); 1390 if (error) 1391 return (error); 1392 if (cmd == TIOCSETAF) 1393 tty_flush(tp, FREAD); 1394 } 1395 1396 /* 1397 * Only call param() when the flags really change. 1398 */ 1399 if ((t->c_cflag & CIGNORE) == 0 && 1400 (tp->t_termios.c_cflag != t->c_cflag || 1401 tp->t_termios.c_ispeed != t->c_ispeed || 1402 tp->t_termios.c_ospeed != t->c_ospeed)) { 1403 error = ttydevsw_param(tp, t); 1404 if (error) 1405 return (error); 1406 1407 /* XXX: CLOCAL? */ 1408 1409 tp->t_termios.c_cflag = t->c_cflag & ~CIGNORE; 1410 tp->t_termios.c_ispeed = t->c_ispeed; 1411 tp->t_termios.c_ospeed = t->c_ospeed; 1412 1413 /* Baud rate has changed - update watermarks. */ 1414 tty_watermarks(tp); 1415 } 1416 1417 /* Copy new non-device driver parameters. */ 1418 tp->t_termios.c_iflag = t->c_iflag; 1419 tp->t_termios.c_oflag = t->c_oflag; 1420 tp->t_termios.c_lflag = t->c_lflag; 1421 memcpy(&tp->t_termios.c_cc, t->c_cc, sizeof t->c_cc); 1422 1423 ttydisc_optimize(tp); 1424 1425 if ((t->c_lflag & ICANON) == 0) { 1426 /* 1427 * When in non-canonical mode, wake up all 1428 * readers. Canonicalize any partial input. VMIN 1429 * and VTIME could also be adjusted. 1430 */ 1431 ttyinq_canonicalize(&tp->t_inq); 1432 tty_wakeup(tp, FREAD); 1433 } 1434 1435 /* 1436 * For packet mode: notify the PTY consumer that VSTOP 1437 * and VSTART may have been changed. 1438 */ 1439 if (tp->t_termios.c_iflag & IXON && 1440 tp->t_termios.c_cc[VSTOP] == CTRL('S') && 1441 tp->t_termios.c_cc[VSTART] == CTRL('Q')) 1442 ttydevsw_pktnotify(tp, TIOCPKT_DOSTOP); 1443 else 1444 ttydevsw_pktnotify(tp, TIOCPKT_NOSTOP); 1445 return (0); 1446 } 1447 case TIOCGETD: 1448 /* For compatibility - we only support TTYDISC. */ 1449 *(int *)data = TTYDISC; 1450 return (0); 1451 case TIOCGPGRP: 1452 if (!tty_is_ctty(tp, td->td_proc)) 1453 return (ENOTTY); 1454 1455 if (tp->t_pgrp != NULL) 1456 *(int *)data = tp->t_pgrp->pg_id; 1457 else 1458 *(int *)data = NO_PID; 1459 return (0); 1460 case TIOCGSID: 1461 if (!tty_is_ctty(tp, td->td_proc)) 1462 return (ENOTTY); 1463 1464 MPASS(tp->t_session); 1465 *(int *)data = tp->t_session->s_sid; 1466 return (0); 1467 case TIOCSCTTY: { 1468 struct proc *p = td->td_proc; 1469 1470 /* XXX: This looks awful. */ 1471 tty_unlock(tp); 1472 sx_xlock(&proctree_lock); 1473 tty_lock(tp); 1474 1475 if (!SESS_LEADER(p)) { 1476 /* Only the session leader may do this. */ 1477 sx_xunlock(&proctree_lock); 1478 return (EPERM); 1479 } 1480 1481 if (tp->t_session != NULL && tp->t_session == p->p_session) { 1482 /* This is already our controlling TTY. */ 1483 sx_xunlock(&proctree_lock); 1484 return (0); 1485 } 1486 1487 if (p->p_session->s_ttyp != NULL || 1488 (tp->t_session != NULL && tp->t_session->s_ttyvp != NULL && 1489 tp->t_session->s_ttyvp->v_type != VBAD)) { 1490 /* 1491 * There is already a relation between a TTY and 1492 * a session, or the caller is not the session 1493 * leader. 1494 * 1495 * Allow the TTY to be stolen when the vnode is 1496 * invalid, but the reference to the TTY is 1497 * still active. This allows immediate reuse of 1498 * TTYs of which the session leader has been 1499 * killed or the TTY revoked. 1500 */ 1501 sx_xunlock(&proctree_lock); 1502 return (EPERM); 1503 } 1504 1505 /* Connect the session to the TTY. */ 1506 tp->t_session = p->p_session; 1507 tp->t_session->s_ttyp = tp; 1508 tp->t_sessioncnt++; 1509 sx_xunlock(&proctree_lock); 1510 1511 /* Assign foreground process group. */ 1512 tp->t_pgrp = p->p_pgrp; 1513 PROC_LOCK(p); 1514 p->p_flag |= P_CONTROLT; 1515 PROC_UNLOCK(p); 1516 1517 return (0); 1518 } 1519 case TIOCSPGRP: { 1520 struct pgrp *pg; 1521 1522 /* 1523 * XXX: Temporarily unlock the TTY to locate the process 1524 * group. This code would be lot nicer if we would ever 1525 * decompose proctree_lock. 1526 */ 1527 tty_unlock(tp); 1528 sx_slock(&proctree_lock); 1529 pg = pgfind(*(int *)data); 1530 if (pg != NULL) 1531 PGRP_UNLOCK(pg); 1532 if (pg == NULL || pg->pg_session != td->td_proc->p_session) { 1533 sx_sunlock(&proctree_lock); 1534 tty_lock(tp); 1535 return (EPERM); 1536 } 1537 tty_lock(tp); 1538 1539 /* 1540 * Determine if this TTY is the controlling TTY after 1541 * relocking the TTY. 1542 */ 1543 if (!tty_is_ctty(tp, td->td_proc)) { 1544 sx_sunlock(&proctree_lock); 1545 return (ENOTTY); 1546 } 1547 tp->t_pgrp = pg; 1548 sx_sunlock(&proctree_lock); 1549 1550 /* Wake up the background process groups. */ 1551 cv_broadcast(&tp->t_bgwait); 1552 return (0); 1553 } 1554 case TIOCFLUSH: { 1555 int flags = *(int *)data; 1556 1557 if (flags == 0) 1558 flags = (FREAD|FWRITE); 1559 else 1560 flags &= (FREAD|FWRITE); 1561 tty_flush(tp, flags); 1562 return (0); 1563 } 1564 case TIOCDRAIN: 1565 /* Drain TTY output. */ 1566 return tty_drain(tp); 1567 case TIOCCONS: 1568 /* Set terminal as console TTY. */ 1569 if (*(int *)data) { 1570 error = priv_check(td, PRIV_TTY_CONSOLE); 1571 if (error) 1572 return (error); 1573 1574 /* 1575 * XXX: constty should really need to be locked! 1576 * XXX: allow disconnected constty's to be stolen! 1577 */ 1578 1579 if (constty == tp) 1580 return (0); 1581 if (constty != NULL) 1582 return (EBUSY); 1583 1584 tty_unlock(tp); 1585 constty_set(tp); 1586 tty_lock(tp); 1587 } else if (constty == tp) { 1588 constty_clear(); 1589 } 1590 return (0); 1591 case TIOCGWINSZ: 1592 /* Obtain window size. */ 1593 *(struct winsize*)data = tp->t_winsize; 1594 return (0); 1595 case TIOCSWINSZ: 1596 /* Set window size. */ 1597 if (bcmp(&tp->t_winsize, data, sizeof(struct winsize)) == 0) 1598 return (0); 1599 tp->t_winsize = *(struct winsize*)data; 1600 tty_signal_pgrp(tp, SIGWINCH); 1601 return (0); 1602 case TIOCEXCL: 1603 tp->t_flags |= TF_EXCLUDE; 1604 return (0); 1605 case TIOCNXCL: 1606 tp->t_flags &= ~TF_EXCLUDE; 1607 return (0); 1608 case TIOCSTOP: 1609 tp->t_flags |= TF_STOPPED; 1610 ttydevsw_pktnotify(tp, TIOCPKT_STOP); 1611 return (0); 1612 case TIOCSTART: 1613 tp->t_flags &= ~TF_STOPPED; 1614 ttydevsw_outwakeup(tp); 1615 ttydevsw_pktnotify(tp, TIOCPKT_START); 1616 return (0); 1617 case TIOCSTAT: 1618 tty_info(tp); 1619 return (0); 1620 } 1621 1622 #ifdef COMPAT_43TTY 1623 return tty_ioctl_compat(tp, cmd, data, td); 1624 #else /* !COMPAT_43TTY */ 1625 return (ENOIOCTL); 1626 #endif /* COMPAT_43TTY */ 1627 } 1628 1629 int 1630 tty_ioctl(struct tty *tp, u_long cmd, void *data, struct thread *td) 1631 { 1632 int error; 1633 1634 tty_lock_assert(tp, MA_OWNED); 1635 1636 if (tty_gone(tp)) 1637 return (ENXIO); 1638 1639 error = ttydevsw_ioctl(tp, cmd, data, td); 1640 if (error == ENOIOCTL) 1641 error = tty_generic_ioctl(tp, cmd, data, td); 1642 1643 return (error); 1644 } 1645 1646 dev_t 1647 tty_udev(struct tty *tp) 1648 { 1649 if (tp->t_dev) 1650 return dev2udev(tp->t_dev); 1651 else 1652 return NODEV; 1653 } 1654 1655 int 1656 tty_checkoutq(struct tty *tp) 1657 { 1658 1659 /* 256 bytes should be enough to print a log message. */ 1660 return (ttyoutq_bytesleft(&tp->t_outq) >= 256); 1661 } 1662 1663 void 1664 tty_hiwat_in_block(struct tty *tp) 1665 { 1666 1667 if ((tp->t_flags & TF_HIWAT_IN) == 0 && 1668 tp->t_termios.c_iflag & IXOFF && 1669 tp->t_termios.c_cc[VSTOP] != _POSIX_VDISABLE) { 1670 /* 1671 * Input flow control. Only enter the high watermark when we 1672 * can successfully store the VSTOP character. 1673 */ 1674 if (ttyoutq_write_nofrag(&tp->t_outq, 1675 &tp->t_termios.c_cc[VSTOP], 1) == 0) 1676 tp->t_flags |= TF_HIWAT_IN; 1677 } else { 1678 /* No input flow control. */ 1679 tp->t_flags |= TF_HIWAT_IN; 1680 } 1681 } 1682 1683 void 1684 tty_hiwat_in_unblock(struct tty *tp) 1685 { 1686 1687 if (tp->t_flags & TF_HIWAT_IN && 1688 tp->t_termios.c_iflag & IXOFF && 1689 tp->t_termios.c_cc[VSTART] != _POSIX_VDISABLE) { 1690 /* 1691 * Input flow control. Only leave the high watermark when we 1692 * can successfully store the VSTART character. 1693 */ 1694 if (ttyoutq_write_nofrag(&tp->t_outq, 1695 &tp->t_termios.c_cc[VSTART], 1) == 0) 1696 tp->t_flags &= ~TF_HIWAT_IN; 1697 } else { 1698 /* No input flow control. */ 1699 tp->t_flags &= ~TF_HIWAT_IN; 1700 } 1701 1702 if (!tty_gone(tp)) 1703 ttydevsw_inwakeup(tp); 1704 } 1705 1706 /* 1707 * TTY hooks interface. 1708 */ 1709 1710 static int 1711 ttyhook_defrint(struct tty *tp, char c, int flags) 1712 { 1713 1714 if (ttyhook_rint_bypass(tp, &c, 1) != 1) 1715 return (-1); 1716 1717 return (0); 1718 } 1719 1720 int 1721 ttyhook_register(struct tty **rtp, struct proc *p, int fd, 1722 struct ttyhook *th, void *softc) 1723 { 1724 struct tty *tp; 1725 struct file *fp; 1726 struct cdev *dev; 1727 struct cdevsw *cdp; 1728 struct filedesc *fdp; 1729 int error; 1730 1731 /* Validate the file descriptor. */ 1732 if ((fdp = p->p_fd) == NULL) 1733 return (EBADF); 1734 1735 fp = fget_unlocked(fdp, fd); 1736 if (fp == NULL) 1737 return (EBADF); 1738 if (fp->f_ops == &badfileops) { 1739 error = EBADF; 1740 goto done1; 1741 } 1742 1743 /* 1744 * Make sure the vnode is bound to a character device. 1745 * Unlocked check for the vnode type is ok there, because we 1746 * only shall prevent calling devvn_refthread on the file that 1747 * never has been opened over a character device. 1748 */ 1749 if (fp->f_type != DTYPE_VNODE || fp->f_vnode->v_type != VCHR) { 1750 error = EINVAL; 1751 goto done1; 1752 } 1753 1754 /* Make sure it is a TTY. */ 1755 cdp = devvn_refthread(fp->f_vnode, &dev); 1756 if (cdp == NULL) { 1757 error = ENXIO; 1758 goto done1; 1759 } 1760 if (dev != fp->f_data) { 1761 error = ENXIO; 1762 goto done2; 1763 } 1764 if (cdp != &ttydev_cdevsw) { 1765 error = ENOTTY; 1766 goto done2; 1767 } 1768 tp = dev->si_drv1; 1769 1770 /* Try to attach the hook to the TTY. */ 1771 error = EBUSY; 1772 tty_lock(tp); 1773 MPASS((tp->t_hook == NULL) == ((tp->t_flags & TF_HOOK) == 0)); 1774 if (tp->t_flags & TF_HOOK) 1775 goto done3; 1776 1777 tp->t_flags |= TF_HOOK; 1778 tp->t_hook = th; 1779 tp->t_hooksoftc = softc; 1780 *rtp = tp; 1781 error = 0; 1782 1783 /* Maybe we can switch into bypass mode now. */ 1784 ttydisc_optimize(tp); 1785 1786 /* Silently convert rint() calls to rint_bypass() when possible. */ 1787 if (!ttyhook_hashook(tp, rint) && ttyhook_hashook(tp, rint_bypass)) 1788 th->th_rint = ttyhook_defrint; 1789 1790 done3: tty_unlock(tp); 1791 done2: dev_relthread(dev); 1792 done1: fdrop(fp, curthread); 1793 return (error); 1794 } 1795 1796 void 1797 ttyhook_unregister(struct tty *tp) 1798 { 1799 1800 tty_lock_assert(tp, MA_OWNED); 1801 MPASS(tp->t_flags & TF_HOOK); 1802 1803 /* Disconnect the hook. */ 1804 tp->t_flags &= ~TF_HOOK; 1805 tp->t_hook = NULL; 1806 1807 /* Maybe we need to leave bypass mode. */ 1808 ttydisc_optimize(tp); 1809 1810 /* Maybe deallocate the TTY as well. */ 1811 tty_rel_free(tp); 1812 } 1813 1814 /* 1815 * /dev/console handling. 1816 */ 1817 1818 static int 1819 ttyconsdev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 1820 { 1821 struct tty *tp; 1822 1823 /* System has no console device. */ 1824 if (dev_console_filename == NULL) 1825 return (ENXIO); 1826 1827 /* Look up corresponding TTY by device name. */ 1828 sx_slock(&tty_list_sx); 1829 TAILQ_FOREACH(tp, &tty_list, t_list) { 1830 if (strcmp(dev_console_filename, tty_devname(tp)) == 0) { 1831 dev_console->si_drv1 = tp; 1832 break; 1833 } 1834 } 1835 sx_sunlock(&tty_list_sx); 1836 1837 /* System console has no TTY associated. */ 1838 if (dev_console->si_drv1 == NULL) 1839 return (ENXIO); 1840 1841 return (ttydev_open(dev, oflags, devtype, td)); 1842 } 1843 1844 static int 1845 ttyconsdev_write(struct cdev *dev, struct uio *uio, int ioflag) 1846 { 1847 1848 log_console(uio); 1849 1850 return (ttydev_write(dev, uio, ioflag)); 1851 } 1852 1853 /* 1854 * /dev/console is a little different than normal TTY's. When opened, 1855 * it determines which TTY to use. When data gets written to it, it 1856 * will be logged in the kernel message buffer. 1857 */ 1858 static struct cdevsw ttyconsdev_cdevsw = { 1859 .d_version = D_VERSION, 1860 .d_open = ttyconsdev_open, 1861 .d_close = ttydev_close, 1862 .d_read = ttydev_read, 1863 .d_write = ttyconsdev_write, 1864 .d_ioctl = ttydev_ioctl, 1865 .d_kqfilter = ttydev_kqfilter, 1866 .d_poll = ttydev_poll, 1867 .d_mmap = ttydev_mmap, 1868 .d_name = "ttyconsdev", 1869 .d_flags = D_TTY, 1870 }; 1871 1872 static void 1873 ttyconsdev_init(void *unused) 1874 { 1875 1876 dev_console = make_dev(&ttyconsdev_cdevsw, 0, UID_ROOT, GID_WHEEL, 1877 0600, "console"); 1878 } 1879 1880 SYSINIT(tty, SI_SUB_DRIVERS, SI_ORDER_FIRST, ttyconsdev_init, NULL); 1881 1882 void 1883 ttyconsdev_select(const char *name) 1884 { 1885 1886 dev_console_filename = name; 1887 } 1888 1889 /* 1890 * Debugging routines. 1891 */ 1892 1893 #include "opt_ddb.h" 1894 #ifdef DDB 1895 #include <ddb/ddb.h> 1896 #include <ddb/db_sym.h> 1897 1898 static struct { 1899 int flag; 1900 char val; 1901 } ttystates[] = { 1902 #if 0 1903 { TF_NOPREFIX, 'N' }, 1904 #endif 1905 { TF_INITLOCK, 'I' }, 1906 { TF_CALLOUT, 'C' }, 1907 1908 /* Keep these together -> 'Oi' and 'Oo'. */ 1909 { TF_OPENED, 'O' }, 1910 { TF_OPENED_IN, 'i' }, 1911 { TF_OPENED_OUT, 'o' }, 1912 { TF_OPENED_CONS, 'c' }, 1913 1914 { TF_GONE, 'G' }, 1915 { TF_OPENCLOSE, 'B' }, 1916 { TF_ASYNC, 'Y' }, 1917 { TF_LITERAL, 'L' }, 1918 1919 /* Keep these together -> 'Hi' and 'Ho'. */ 1920 { TF_HIWAT, 'H' }, 1921 { TF_HIWAT_IN, 'i' }, 1922 { TF_HIWAT_OUT, 'o' }, 1923 1924 { TF_STOPPED, 'S' }, 1925 { TF_EXCLUDE, 'X' }, 1926 { TF_BYPASS, 'l' }, 1927 { TF_ZOMBIE, 'Z' }, 1928 { TF_HOOK, 's' }, 1929 1930 /* Keep these together -> 'bi' and 'bo'. */ 1931 { TF_BUSY, 'b' }, 1932 { TF_BUSY_IN, 'i' }, 1933 { TF_BUSY_OUT, 'o' }, 1934 1935 { 0, '\0'}, 1936 }; 1937 1938 #define TTY_FLAG_BITS \ 1939 "\20\1NOPREFIX\2INITLOCK\3CALLOUT\4OPENED_IN\5OPENED_OUT\6GONE" \ 1940 "\7OPENCLOSE\10ASYNC\11LITERAL\12HIWAT_IN\13HIWAT_OUT\14STOPPED" \ 1941 "\15EXCLUDE\16BYPASS\17ZOMBIE\20HOOK" 1942 1943 #define DB_PRINTSYM(name, addr) \ 1944 db_printf("%s " #name ": ", sep); \ 1945 db_printsym((db_addr_t) addr, DB_STGY_ANY); \ 1946 db_printf("\n"); 1947 1948 static void 1949 _db_show_devsw(const char *sep, const struct ttydevsw *tsw) 1950 { 1951 db_printf("%sdevsw: ", sep); 1952 db_printsym((db_addr_t)tsw, DB_STGY_ANY); 1953 db_printf(" (%p)\n", tsw); 1954 DB_PRINTSYM(open, tsw->tsw_open); 1955 DB_PRINTSYM(close, tsw->tsw_close); 1956 DB_PRINTSYM(outwakeup, tsw->tsw_outwakeup); 1957 DB_PRINTSYM(inwakeup, tsw->tsw_inwakeup); 1958 DB_PRINTSYM(ioctl, tsw->tsw_ioctl); 1959 DB_PRINTSYM(param, tsw->tsw_param); 1960 DB_PRINTSYM(modem, tsw->tsw_modem); 1961 DB_PRINTSYM(mmap, tsw->tsw_mmap); 1962 DB_PRINTSYM(pktnotify, tsw->tsw_pktnotify); 1963 DB_PRINTSYM(free, tsw->tsw_free); 1964 } 1965 static void 1966 _db_show_hooks(const char *sep, const struct ttyhook *th) 1967 { 1968 db_printf("%shook: ", sep); 1969 db_printsym((db_addr_t)th, DB_STGY_ANY); 1970 db_printf(" (%p)\n", th); 1971 if (th == NULL) 1972 return; 1973 DB_PRINTSYM(rint, th->th_rint); 1974 DB_PRINTSYM(rint_bypass, th->th_rint_bypass); 1975 DB_PRINTSYM(rint_done, th->th_rint_done); 1976 DB_PRINTSYM(rint_poll, th->th_rint_poll); 1977 DB_PRINTSYM(getc_inject, th->th_getc_inject); 1978 DB_PRINTSYM(getc_capture, th->th_getc_capture); 1979 DB_PRINTSYM(getc_poll, th->th_getc_poll); 1980 DB_PRINTSYM(close, th->th_close); 1981 } 1982 1983 static void 1984 _db_show_termios(const char *name, const struct termios *t) 1985 { 1986 1987 db_printf("%s: iflag 0x%x oflag 0x%x cflag 0x%x " 1988 "lflag 0x%x ispeed %u ospeed %u\n", name, 1989 t->c_iflag, t->c_oflag, t->c_cflag, t->c_lflag, 1990 t->c_ispeed, t->c_ospeed); 1991 } 1992 1993 /* DDB command to show TTY statistics. */ 1994 DB_SHOW_COMMAND(tty, db_show_tty) 1995 { 1996 struct tty *tp; 1997 1998 if (!have_addr) { 1999 db_printf("usage: show tty <addr>\n"); 2000 return; 2001 } 2002 tp = (struct tty *)addr; 2003 2004 db_printf("0x%p: %s\n", tp, tty_devname(tp)); 2005 db_printf("\tmtx: %p\n", tp->t_mtx); 2006 db_printf("\tflags: %b\n", tp->t_flags, TTY_FLAG_BITS); 2007 db_printf("\trevokecnt: %u\n", tp->t_revokecnt); 2008 2009 /* Buffering mechanisms. */ 2010 db_printf("\tinq: %p begin %u linestart %u reprint %u end %u " 2011 "nblocks %u quota %u\n", &tp->t_inq, tp->t_inq.ti_begin, 2012 tp->t_inq.ti_linestart, tp->t_inq.ti_reprint, tp->t_inq.ti_end, 2013 tp->t_inq.ti_nblocks, tp->t_inq.ti_quota); 2014 db_printf("\toutq: %p begin %u end %u nblocks %u quota %u\n", 2015 &tp->t_outq, tp->t_outq.to_begin, tp->t_outq.to_end, 2016 tp->t_outq.to_nblocks, tp->t_outq.to_quota); 2017 db_printf("\tinlow: %zu\n", tp->t_inlow); 2018 db_printf("\toutlow: %zu\n", tp->t_outlow); 2019 _db_show_termios("\ttermios", &tp->t_termios); 2020 db_printf("\twinsize: row %u col %u xpixel %u ypixel %u\n", 2021 tp->t_winsize.ws_row, tp->t_winsize.ws_col, 2022 tp->t_winsize.ws_xpixel, tp->t_winsize.ws_ypixel); 2023 db_printf("\tcolumn: %u\n", tp->t_column); 2024 db_printf("\twritepos: %u\n", tp->t_writepos); 2025 db_printf("\tcompatflags: 0x%x\n", tp->t_compatflags); 2026 2027 /* Init/lock-state devices. */ 2028 _db_show_termios("\ttermios_init_in", &tp->t_termios_init_in); 2029 _db_show_termios("\ttermios_init_out", &tp->t_termios_init_out); 2030 _db_show_termios("\ttermios_lock_in", &tp->t_termios_lock_in); 2031 _db_show_termios("\ttermios_lock_out", &tp->t_termios_lock_out); 2032 2033 /* Hooks */ 2034 _db_show_devsw("\t", tp->t_devsw); 2035 _db_show_hooks("\t", tp->t_hook); 2036 2037 /* Process info. */ 2038 db_printf("\tpgrp: %p gid %d jobc %d\n", tp->t_pgrp, 2039 tp->t_pgrp ? tp->t_pgrp->pg_id : 0, 2040 tp->t_pgrp ? tp->t_pgrp->pg_jobc : 0); 2041 db_printf("\tsession: %p", tp->t_session); 2042 if (tp->t_session != NULL) 2043 db_printf(" count %u leader %p tty %p sid %d login %s", 2044 tp->t_session->s_count, tp->t_session->s_leader, 2045 tp->t_session->s_ttyp, tp->t_session->s_sid, 2046 tp->t_session->s_login); 2047 db_printf("\n"); 2048 db_printf("\tsessioncnt: %u\n", tp->t_sessioncnt); 2049 db_printf("\tdevswsoftc: %p\n", tp->t_devswsoftc); 2050 db_printf("\thooksoftc: %p\n", tp->t_hooksoftc); 2051 db_printf("\tdev: %p\n", tp->t_dev); 2052 } 2053 2054 /* DDB command to list TTYs. */ 2055 DB_SHOW_ALL_COMMAND(ttys, db_show_all_ttys) 2056 { 2057 struct tty *tp; 2058 size_t isiz, osiz; 2059 int i, j; 2060 2061 /* Make the output look like `pstat -t'. */ 2062 db_printf("PTR "); 2063 #if defined(__LP64__) 2064 db_printf(" "); 2065 #endif 2066 db_printf(" LINE INQ CAN LIN LOW OUTQ USE LOW " 2067 "COL SESS PGID STATE\n"); 2068 2069 TAILQ_FOREACH(tp, &tty_list, t_list) { 2070 isiz = tp->t_inq.ti_nblocks * TTYINQ_DATASIZE; 2071 osiz = tp->t_outq.to_nblocks * TTYOUTQ_DATASIZE; 2072 2073 db_printf("%p %10s %5zu %4u %4u %4zu %5zu %4u %4zu %5u %5d %5d ", 2074 tp, 2075 tty_devname(tp), 2076 isiz, 2077 tp->t_inq.ti_linestart - tp->t_inq.ti_begin, 2078 tp->t_inq.ti_end - tp->t_inq.ti_linestart, 2079 isiz - tp->t_inlow, 2080 osiz, 2081 tp->t_outq.to_end - tp->t_outq.to_begin, 2082 osiz - tp->t_outlow, 2083 MIN(tp->t_column, 99999), 2084 tp->t_session ? tp->t_session->s_sid : 0, 2085 tp->t_pgrp ? tp->t_pgrp->pg_id : 0); 2086 2087 /* Flag bits. */ 2088 for (i = j = 0; ttystates[i].flag; i++) 2089 if (tp->t_flags & ttystates[i].flag) { 2090 db_printf("%c", ttystates[i].val); 2091 j++; 2092 } 2093 if (j == 0) 2094 db_printf("-"); 2095 db_printf("\n"); 2096 } 2097 } 2098 #endif /* DDB */ 2099