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 = 0; 106 107 /* Provide an input buffer for 0.2 seconds of data. */ 108 if (tp->t_termios.c_cflag & CREAD) 109 bs = MIN(tp->t_termios.c_ispeed / 5, TTYBUF_MAX); 110 ttyinq_setsize(&tp->t_inq, tp, bs); 111 112 /* Set low watermark at 10% (when 90% is available). */ 113 tp->t_inlow = (ttyinq_getallocatedsize(&tp->t_inq) * 9) / 10; 114 115 /* Provide an ouput buffer for 0.2 seconds of data. */ 116 bs = MIN(tp->t_termios.c_ospeed / 5, TTYBUF_MAX); 117 ttyoutq_setsize(&tp->t_outq, tp, bs); 118 119 /* Set low watermark at 10% (when 90% is available). */ 120 tp->t_outlow = (ttyoutq_getallocatedsize(&tp->t_outq) * 9) / 10; 121 } 122 123 static int 124 tty_drain(struct tty *tp) 125 { 126 int error; 127 128 if (ttyhook_hashook(tp, getc_inject)) 129 /* buffer is inaccessible */ 130 return (0); 131 132 while (ttyoutq_bytesused(&tp->t_outq) > 0) { 133 ttydevsw_outwakeup(tp); 134 /* Could be handled synchronously. */ 135 if (ttyoutq_bytesused(&tp->t_outq) == 0) 136 return (0); 137 138 /* Wait for data to be drained. */ 139 error = tty_wait(tp, &tp->t_outwait); 140 if (error) 141 return (error); 142 } 143 144 return (0); 145 } 146 147 /* 148 * Though ttydev_enter() and ttydev_leave() seem to be related, they 149 * don't have to be used together. ttydev_enter() is used by the cdev 150 * operations to prevent an actual operation from being processed when 151 * the TTY has been abandoned. ttydev_leave() is used by ttydev_open() 152 * and ttydev_close() to determine whether per-TTY data should be 153 * deallocated. 154 */ 155 156 static __inline int 157 ttydev_enter(struct tty *tp) 158 { 159 tty_lock(tp); 160 161 if (tty_gone(tp) || !tty_opened(tp)) { 162 /* Device is already gone. */ 163 tty_unlock(tp); 164 return (ENXIO); 165 } 166 167 return (0); 168 } 169 170 static void 171 ttydev_leave(struct tty *tp) 172 { 173 tty_lock_assert(tp, MA_OWNED); 174 175 if (tty_opened(tp) || tp->t_flags & TF_OPENCLOSE) { 176 /* Device is still opened somewhere. */ 177 tty_unlock(tp); 178 return; 179 } 180 181 tp->t_flags |= TF_OPENCLOSE; 182 183 /* Stop asynchronous I/O. */ 184 funsetown(&tp->t_sigio); 185 186 /* Remove console TTY. */ 187 if (constty == tp) 188 constty_clear(); 189 190 /* Drain any output. */ 191 MPASS((tp->t_flags & TF_STOPPED) == 0); 192 if (!tty_gone(tp)) 193 tty_drain(tp); 194 195 ttydisc_close(tp); 196 197 /* Destroy associated buffers already. */ 198 ttyinq_free(&tp->t_inq); 199 tp->t_inlow = 0; 200 ttyoutq_free(&tp->t_outq); 201 tp->t_outlow = 0; 202 203 knlist_clear(&tp->t_inpoll.si_note, 1); 204 knlist_clear(&tp->t_outpoll.si_note, 1); 205 206 if (!tty_gone(tp)) 207 ttydevsw_close(tp); 208 209 tp->t_flags &= ~TF_OPENCLOSE; 210 cv_broadcast(&tp->t_dcdwait); 211 tty_rel_free(tp); 212 } 213 214 /* 215 * Operations that are exposed through the character device in /dev. 216 */ 217 static int 218 ttydev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 219 { 220 struct tty *tp = dev->si_drv1; 221 int error = 0; 222 223 tty_lock(tp); 224 if (tty_gone(tp)) { 225 /* Device is already gone. */ 226 tty_unlock(tp); 227 return (ENXIO); 228 } 229 230 /* 231 * Block when other processes are currently opening or closing 232 * the TTY. 233 */ 234 while (tp->t_flags & TF_OPENCLOSE) { 235 error = tty_wait(tp, &tp->t_dcdwait); 236 if (error != 0) { 237 tty_unlock(tp); 238 return (error); 239 } 240 } 241 tp->t_flags |= TF_OPENCLOSE; 242 243 /* 244 * Make sure the "tty" and "cua" device cannot be opened at the 245 * same time. 246 */ 247 if (TTY_CALLOUT(tp, dev)) { 248 if (tp->t_flags & TF_OPENED_IN) { 249 error = EBUSY; 250 goto done; 251 } 252 } else { 253 if (tp->t_flags & TF_OPENED_OUT) { 254 error = EBUSY; 255 goto done; 256 } 257 } 258 259 if (tp->t_flags & TF_EXCLUDE && priv_check(td, PRIV_TTY_EXCLUSIVE)) { 260 error = EBUSY; 261 goto done; 262 } 263 264 if (!tty_opened(tp)) { 265 /* Set proper termios flags. */ 266 if (TTY_CALLOUT(tp, dev)) { 267 tp->t_termios = tp->t_termios_init_out; 268 } else { 269 tp->t_termios = tp->t_termios_init_in; 270 } 271 ttydevsw_param(tp, &tp->t_termios); 272 273 ttydevsw_modem(tp, SER_DTR|SER_RTS, 0); 274 275 error = ttydevsw_open(tp); 276 if (error != 0) 277 goto done; 278 279 ttydisc_open(tp); 280 tty_watermarks(tp); 281 } 282 283 /* Wait for Carrier Detect. */ 284 if (!TTY_CALLOUT(tp, dev) && (oflags & O_NONBLOCK) == 0 && 285 (tp->t_termios.c_cflag & CLOCAL) == 0) { 286 while ((ttydevsw_modem(tp, 0, 0) & SER_DCD) == 0) { 287 error = tty_wait(tp, &tp->t_dcdwait); 288 if (error != 0) 289 goto done; 290 } 291 } 292 293 if (dev == dev_console) 294 tp->t_flags |= TF_OPENED_CONS; 295 else if (TTY_CALLOUT(tp, dev)) 296 tp->t_flags |= TF_OPENED_OUT; 297 else 298 tp->t_flags |= TF_OPENED_IN; 299 300 done: tp->t_flags &= ~TF_OPENCLOSE; 301 cv_broadcast(&tp->t_dcdwait); 302 ttydev_leave(tp); 303 304 return (error); 305 } 306 307 static int 308 ttydev_close(struct cdev *dev, int fflag, int devtype, struct thread *td) 309 { 310 struct tty *tp = dev->si_drv1; 311 312 tty_lock(tp); 313 314 /* 315 * Don't actually close the device if it is being used as the 316 * console. 317 */ 318 MPASS((tp->t_flags & TF_OPENED) != TF_OPENED); 319 if (dev == dev_console) 320 tp->t_flags &= ~TF_OPENED_CONS; 321 else 322 tp->t_flags &= ~(TF_OPENED_IN|TF_OPENED_OUT); 323 324 if (tp->t_flags & TF_OPENED) { 325 tty_unlock(tp); 326 return (0); 327 } 328 329 /* 330 * This can only be called once. The callin and the callout 331 * devices cannot be opened at the same time. 332 */ 333 tp->t_flags &= ~(TF_EXCLUDE|TF_STOPPED); 334 335 /* Properly wake up threads that are stuck - revoke(). */ 336 tp->t_revokecnt++; 337 tty_wakeup(tp, FREAD|FWRITE); 338 cv_broadcast(&tp->t_bgwait); 339 cv_broadcast(&tp->t_dcdwait); 340 341 ttydev_leave(tp); 342 343 return (0); 344 } 345 346 static __inline int 347 tty_is_ctty(struct tty *tp, struct proc *p) 348 { 349 tty_lock_assert(tp, MA_OWNED); 350 351 return (p->p_session == tp->t_session && p->p_flag & P_CONTROLT); 352 } 353 354 static int 355 tty_wait_background(struct tty *tp, struct thread *td, int sig) 356 { 357 struct proc *p = td->td_proc; 358 struct pgrp *pg; 359 ksiginfo_t ksi; 360 int error; 361 362 MPASS(sig == SIGTTIN || sig == SIGTTOU); 363 tty_lock_assert(tp, MA_OWNED); 364 365 for (;;) { 366 PROC_LOCK(p); 367 /* 368 * The process should only sleep, when: 369 * - This terminal is the controling terminal 370 * - Its process group is not the foreground process 371 * group 372 * - The parent process isn't waiting for the child to 373 * exit 374 * - the signal to send to the process isn't masked 375 */ 376 if (!tty_is_ctty(tp, p) || p->p_pgrp == tp->t_pgrp) { 377 /* Allow the action to happen. */ 378 PROC_UNLOCK(p); 379 return (0); 380 } 381 382 if (SIGISMEMBER(p->p_sigacts->ps_sigignore, sig) || 383 SIGISMEMBER(td->td_sigmask, sig)) { 384 /* Only allow them in write()/ioctl(). */ 385 PROC_UNLOCK(p); 386 return (sig == SIGTTOU ? 0 : EIO); 387 } 388 389 pg = p->p_pgrp; 390 if (p->p_flag & P_PPWAIT || pg->pg_jobc == 0) { 391 /* Don't allow the action to happen. */ 392 PROC_UNLOCK(p); 393 return (EIO); 394 } 395 PROC_UNLOCK(p); 396 397 /* 398 * Send the signal and sleep until we're the new 399 * foreground process group. 400 */ 401 if (sig != 0) { 402 ksiginfo_init(&ksi); 403 ksi.ksi_code = SI_KERNEL; 404 ksi.ksi_signo = sig; 405 sig = 0; 406 } 407 PGRP_LOCK(pg); 408 pgsignal(pg, ksi.ksi_signo, 1, &ksi); 409 PGRP_UNLOCK(pg); 410 411 error = tty_wait(tp, &tp->t_bgwait); 412 if (error) 413 return (error); 414 } 415 } 416 417 static int 418 ttydev_read(struct cdev *dev, struct uio *uio, int ioflag) 419 { 420 struct tty *tp = dev->si_drv1; 421 int error; 422 423 error = ttydev_enter(tp); 424 if (error) 425 goto done; 426 427 error = tty_wait_background(tp, curthread, SIGTTIN); 428 if (error) { 429 tty_unlock(tp); 430 goto done; 431 } 432 433 error = ttydisc_read(tp, uio, ioflag); 434 tty_unlock(tp); 435 436 /* 437 * The read() call should not throw an error when the device is 438 * being destroyed. Silently convert it to an EOF. 439 */ 440 done: if (error == ENXIO) 441 error = 0; 442 return (error); 443 } 444 445 static int 446 ttydev_write(struct cdev *dev, struct uio *uio, int ioflag) 447 { 448 struct tty *tp = dev->si_drv1; 449 int error; 450 451 error = ttydev_enter(tp); 452 if (error) 453 return (error); 454 455 if (tp->t_termios.c_lflag & TOSTOP) { 456 error = tty_wait_background(tp, curthread, SIGTTOU); 457 if (error) 458 goto done; 459 } 460 461 if (ioflag & IO_NDELAY && tp->t_flags & TF_BUSY_OUT) { 462 /* Allow non-blocking writes to bypass serialization. */ 463 error = ttydisc_write(tp, uio, ioflag); 464 } else { 465 /* Serialize write() calls. */ 466 while (tp->t_flags & TF_BUSY_OUT) { 467 error = tty_wait(tp, &tp->t_outserwait); 468 if (error) 469 goto done; 470 } 471 472 tp->t_flags |= TF_BUSY_OUT; 473 error = ttydisc_write(tp, uio, ioflag); 474 tp->t_flags &= ~TF_BUSY_OUT; 475 cv_signal(&tp->t_outserwait); 476 } 477 478 done: tty_unlock(tp); 479 return (error); 480 } 481 482 static int 483 ttydev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, 484 struct thread *td) 485 { 486 struct tty *tp = dev->si_drv1; 487 int error; 488 489 error = ttydev_enter(tp); 490 if (error) 491 return (error); 492 493 switch (cmd) { 494 case TIOCCBRK: 495 case TIOCCONS: 496 case TIOCDRAIN: 497 case TIOCEXCL: 498 case TIOCFLUSH: 499 case TIOCNXCL: 500 case TIOCSBRK: 501 case TIOCSCTTY: 502 case TIOCSETA: 503 case TIOCSETAF: 504 case TIOCSETAW: 505 case TIOCSPGRP: 506 case TIOCSTART: 507 case TIOCSTAT: 508 case TIOCSTOP: 509 case TIOCSWINSZ: 510 #if 0 511 case TIOCSDRAINWAIT: 512 case TIOCSETD: 513 case TIOCSTI: 514 #endif 515 #ifdef COMPAT_43TTY 516 case TIOCLBIC: 517 case TIOCLBIS: 518 case TIOCLSET: 519 case TIOCSETC: 520 case OTIOCSETD: 521 case TIOCSETN: 522 case TIOCSETP: 523 case TIOCSLTC: 524 #endif /* COMPAT_43TTY */ 525 /* 526 * If the ioctl() causes the TTY to be modified, let it 527 * wait in the background. 528 */ 529 error = tty_wait_background(tp, curthread, SIGTTOU); 530 if (error) 531 goto done; 532 } 533 534 if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 535 struct termios *old = &tp->t_termios; 536 struct termios *new = (struct termios *)data; 537 struct termios *lock = TTY_CALLOUT(tp, dev) ? 538 &tp->t_termios_lock_out : &tp->t_termios_lock_in; 539 int cc; 540 541 /* 542 * Lock state devices. Just overwrite the values of the 543 * commands that are currently in use. 544 */ 545 new->c_iflag = (old->c_iflag & lock->c_iflag) | 546 (new->c_iflag & ~lock->c_iflag); 547 new->c_oflag = (old->c_oflag & lock->c_oflag) | 548 (new->c_oflag & ~lock->c_oflag); 549 new->c_cflag = (old->c_cflag & lock->c_cflag) | 550 (new->c_cflag & ~lock->c_cflag); 551 new->c_lflag = (old->c_lflag & lock->c_lflag) | 552 (new->c_lflag & ~lock->c_lflag); 553 for (cc = 0; cc < NCCS; ++cc) 554 if (lock->c_cc[cc]) 555 new->c_cc[cc] = old->c_cc[cc]; 556 if (lock->c_ispeed) 557 new->c_ispeed = old->c_ispeed; 558 if (lock->c_ospeed) 559 new->c_ospeed = old->c_ospeed; 560 } 561 562 error = tty_ioctl(tp, cmd, data, td); 563 done: tty_unlock(tp); 564 565 return (error); 566 } 567 568 static int 569 ttydev_poll(struct cdev *dev, int events, struct thread *td) 570 { 571 struct tty *tp = dev->si_drv1; 572 int error, revents = 0; 573 574 error = ttydev_enter(tp); 575 if (error) 576 return ((events & (POLLIN|POLLRDNORM)) | POLLHUP); 577 578 if (events & (POLLIN|POLLRDNORM)) { 579 /* See if we can read something. */ 580 if (ttydisc_read_poll(tp) > 0) 581 revents |= events & (POLLIN|POLLRDNORM); 582 } 583 584 if (tp->t_flags & TF_ZOMBIE) { 585 /* Hangup flag on zombie state. */ 586 revents |= POLLHUP; 587 } else if (events & (POLLOUT|POLLWRNORM)) { 588 /* See if we can write something. */ 589 if (ttydisc_write_poll(tp) > 0) 590 revents |= events & (POLLOUT|POLLWRNORM); 591 } 592 593 if (revents == 0) { 594 if (events & (POLLIN|POLLRDNORM)) 595 selrecord(td, &tp->t_inpoll); 596 if (events & (POLLOUT|POLLWRNORM)) 597 selrecord(td, &tp->t_outpoll); 598 } 599 600 tty_unlock(tp); 601 602 return (revents); 603 } 604 605 static int 606 ttydev_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, 607 int nprot, vm_memattr_t *memattr) 608 { 609 struct tty *tp = dev->si_drv1; 610 int error; 611 612 /* Handle mmap() through the driver. */ 613 614 error = ttydev_enter(tp); 615 if (error) 616 return (-1); 617 error = ttydevsw_mmap(tp, offset, paddr, nprot, memattr); 618 tty_unlock(tp); 619 620 return (error); 621 } 622 623 /* 624 * kqueue support. 625 */ 626 627 static void 628 tty_kqops_read_detach(struct knote *kn) 629 { 630 struct tty *tp = kn->kn_hook; 631 632 knlist_remove(&tp->t_inpoll.si_note, kn, 0); 633 } 634 635 static int 636 tty_kqops_read_event(struct knote *kn, long hint) 637 { 638 struct tty *tp = kn->kn_hook; 639 640 tty_lock_assert(tp, MA_OWNED); 641 642 if (tty_gone(tp) || tp->t_flags & TF_ZOMBIE) { 643 kn->kn_flags |= EV_EOF; 644 return (1); 645 } else { 646 kn->kn_data = ttydisc_read_poll(tp); 647 return (kn->kn_data > 0); 648 } 649 } 650 651 static void 652 tty_kqops_write_detach(struct knote *kn) 653 { 654 struct tty *tp = kn->kn_hook; 655 656 knlist_remove(&tp->t_outpoll.si_note, kn, 0); 657 } 658 659 static int 660 tty_kqops_write_event(struct knote *kn, long hint) 661 { 662 struct tty *tp = kn->kn_hook; 663 664 tty_lock_assert(tp, MA_OWNED); 665 666 if (tty_gone(tp)) { 667 kn->kn_flags |= EV_EOF; 668 return (1); 669 } else { 670 kn->kn_data = ttydisc_write_poll(tp); 671 return (kn->kn_data > 0); 672 } 673 } 674 675 static struct filterops tty_kqops_read = { 676 .f_isfd = 1, 677 .f_detach = tty_kqops_read_detach, 678 .f_event = tty_kqops_read_event, 679 }; 680 static struct filterops tty_kqops_write = { 681 .f_isfd = 1, 682 .f_detach = tty_kqops_write_detach, 683 .f_event = tty_kqops_write_event, 684 }; 685 686 static int 687 ttydev_kqfilter(struct cdev *dev, struct knote *kn) 688 { 689 struct tty *tp = dev->si_drv1; 690 int error; 691 692 error = ttydev_enter(tp); 693 if (error) 694 return (error); 695 696 switch (kn->kn_filter) { 697 case EVFILT_READ: 698 kn->kn_hook = tp; 699 kn->kn_fop = &tty_kqops_read; 700 knlist_add(&tp->t_inpoll.si_note, kn, 1); 701 break; 702 case EVFILT_WRITE: 703 kn->kn_hook = tp; 704 kn->kn_fop = &tty_kqops_write; 705 knlist_add(&tp->t_outpoll.si_note, kn, 1); 706 break; 707 default: 708 error = EINVAL; 709 break; 710 } 711 712 tty_unlock(tp); 713 return (error); 714 } 715 716 static struct cdevsw ttydev_cdevsw = { 717 .d_version = D_VERSION, 718 .d_open = ttydev_open, 719 .d_close = ttydev_close, 720 .d_read = ttydev_read, 721 .d_write = ttydev_write, 722 .d_ioctl = ttydev_ioctl, 723 .d_kqfilter = ttydev_kqfilter, 724 .d_poll = ttydev_poll, 725 .d_mmap = ttydev_mmap, 726 .d_name = "ttydev", 727 .d_flags = D_TTY, 728 }; 729 730 /* 731 * Init/lock-state devices 732 */ 733 734 static int 735 ttyil_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 736 { 737 struct tty *tp = dev->si_drv1; 738 int error = 0; 739 740 tty_lock(tp); 741 if (tty_gone(tp)) 742 error = ENODEV; 743 tty_unlock(tp); 744 745 return (error); 746 } 747 748 static int 749 ttyil_close(struct cdev *dev, int flag, int mode, struct thread *td) 750 { 751 return (0); 752 } 753 754 static int 755 ttyil_rdwr(struct cdev *dev, struct uio *uio, int ioflag) 756 { 757 return (ENODEV); 758 } 759 760 static int 761 ttyil_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, 762 struct thread *td) 763 { 764 struct tty *tp = dev->si_drv1; 765 int error = 0; 766 767 tty_lock(tp); 768 if (tty_gone(tp)) { 769 error = ENODEV; 770 goto done; 771 } 772 773 switch (cmd) { 774 case TIOCGETA: 775 /* Obtain terminal flags through tcgetattr(). */ 776 *(struct termios*)data = *(struct termios*)dev->si_drv2; 777 break; 778 case TIOCSETA: 779 /* Set terminal flags through tcsetattr(). */ 780 error = priv_check(td, PRIV_TTY_SETA); 781 if (error) 782 break; 783 *(struct termios*)dev->si_drv2 = *(struct termios*)data; 784 break; 785 case TIOCGETD: 786 *(int *)data = TTYDISC; 787 break; 788 case TIOCGWINSZ: 789 bzero(data, sizeof(struct winsize)); 790 break; 791 default: 792 error = ENOTTY; 793 } 794 795 done: tty_unlock(tp); 796 return (error); 797 } 798 799 static struct cdevsw ttyil_cdevsw = { 800 .d_version = D_VERSION, 801 .d_open = ttyil_open, 802 .d_close = ttyil_close, 803 .d_read = ttyil_rdwr, 804 .d_write = ttyil_rdwr, 805 .d_ioctl = ttyil_ioctl, 806 .d_name = "ttyil", 807 .d_flags = D_TTY, 808 }; 809 810 static void 811 tty_init_termios(struct tty *tp) 812 { 813 struct termios *t = &tp->t_termios_init_in; 814 815 t->c_cflag = TTYDEF_CFLAG; 816 t->c_iflag = TTYDEF_IFLAG; 817 t->c_lflag = TTYDEF_LFLAG; 818 t->c_oflag = TTYDEF_OFLAG; 819 t->c_ispeed = TTYDEF_SPEED; 820 t->c_ospeed = TTYDEF_SPEED; 821 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars); 822 823 tp->t_termios_init_out = *t; 824 } 825 826 void 827 tty_init_console(struct tty *tp, speed_t s) 828 { 829 struct termios *ti = &tp->t_termios_init_in; 830 struct termios *to = &tp->t_termios_init_out; 831 832 if (s != 0) { 833 ti->c_ispeed = ti->c_ospeed = s; 834 to->c_ispeed = to->c_ospeed = s; 835 } 836 837 ti->c_cflag |= CLOCAL; 838 to->c_cflag |= CLOCAL; 839 } 840 841 /* 842 * Standard device routine implementations, mostly meant for 843 * pseudo-terminal device drivers. When a driver creates a new terminal 844 * device class, missing routines are patched. 845 */ 846 847 static int 848 ttydevsw_defopen(struct tty *tp) 849 { 850 851 return (0); 852 } 853 854 static void 855 ttydevsw_defclose(struct tty *tp) 856 { 857 } 858 859 static void 860 ttydevsw_defoutwakeup(struct tty *tp) 861 { 862 863 panic("Terminal device has output, while not implemented"); 864 } 865 866 static void 867 ttydevsw_definwakeup(struct tty *tp) 868 { 869 } 870 871 static int 872 ttydevsw_defioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td) 873 { 874 875 return (ENOIOCTL); 876 } 877 878 static int 879 ttydevsw_defparam(struct tty *tp, struct termios *t) 880 { 881 882 /* 883 * Allow the baud rate to be adjusted for pseudo-devices, but at 884 * least restrict it to 115200 to prevent excessive buffer 885 * usage. Also disallow 0, to prevent foot shooting. 886 */ 887 if (t->c_ispeed < B50) 888 t->c_ispeed = B50; 889 else if (t->c_ispeed > B115200) 890 t->c_ispeed = B115200; 891 if (t->c_ospeed < B50) 892 t->c_ospeed = B50; 893 else if (t->c_ospeed > B115200) 894 t->c_ospeed = B115200; 895 t->c_cflag |= CREAD; 896 897 return (0); 898 } 899 900 static int 901 ttydevsw_defmodem(struct tty *tp, int sigon, int sigoff) 902 { 903 904 /* Simulate a carrier to make the TTY layer happy. */ 905 return (SER_DCD); 906 } 907 908 static int 909 ttydevsw_defmmap(struct tty *tp, vm_ooffset_t offset, vm_paddr_t *paddr, 910 int nprot, vm_memattr_t *memattr) 911 { 912 913 return (-1); 914 } 915 916 static void 917 ttydevsw_defpktnotify(struct tty *tp, char event) 918 { 919 } 920 921 static void 922 ttydevsw_deffree(void *softc) 923 { 924 925 panic("Terminal device freed without a free-handler"); 926 } 927 928 /* 929 * TTY allocation and deallocation. TTY devices can be deallocated when 930 * the driver doesn't use it anymore, when the TTY isn't a session's 931 * controlling TTY and when the device node isn't opened through devfs. 932 */ 933 934 struct tty * 935 tty_alloc(struct ttydevsw *tsw, void *sc) 936 { 937 938 return (tty_alloc_mutex(tsw, sc, NULL)); 939 } 940 941 struct tty * 942 tty_alloc_mutex(struct ttydevsw *tsw, void *sc, struct mtx *mutex) 943 { 944 struct tty *tp; 945 946 /* Make sure the driver defines all routines. */ 947 #define PATCH_FUNC(x) do { \ 948 if (tsw->tsw_ ## x == NULL) \ 949 tsw->tsw_ ## x = ttydevsw_def ## x; \ 950 } while (0) 951 PATCH_FUNC(open); 952 PATCH_FUNC(close); 953 PATCH_FUNC(outwakeup); 954 PATCH_FUNC(inwakeup); 955 PATCH_FUNC(ioctl); 956 PATCH_FUNC(param); 957 PATCH_FUNC(modem); 958 PATCH_FUNC(mmap); 959 PATCH_FUNC(pktnotify); 960 PATCH_FUNC(free); 961 #undef PATCH_FUNC 962 963 tp = malloc(sizeof(struct tty), M_TTY, M_WAITOK|M_ZERO); 964 tp->t_devsw = tsw; 965 tp->t_devswsoftc = sc; 966 tp->t_flags = tsw->tsw_flags; 967 968 tty_init_termios(tp); 969 970 cv_init(&tp->t_inwait, "ttyin"); 971 cv_init(&tp->t_outwait, "ttyout"); 972 cv_init(&tp->t_outserwait, "ttyosr"); 973 cv_init(&tp->t_bgwait, "ttybg"); 974 cv_init(&tp->t_dcdwait, "ttydcd"); 975 976 /* Allow drivers to use a custom mutex to lock the TTY. */ 977 if (mutex != NULL) { 978 tp->t_mtx = mutex; 979 } else { 980 tp->t_mtx = &tp->t_mtxobj; 981 mtx_init(&tp->t_mtxobj, "ttymtx", NULL, MTX_DEF); 982 } 983 984 knlist_init_mtx(&tp->t_inpoll.si_note, tp->t_mtx); 985 knlist_init_mtx(&tp->t_outpoll.si_note, tp->t_mtx); 986 987 sx_xlock(&tty_list_sx); 988 TAILQ_INSERT_TAIL(&tty_list, tp, t_list); 989 tty_list_count++; 990 sx_xunlock(&tty_list_sx); 991 992 return (tp); 993 } 994 995 static void 996 tty_dealloc(void *arg) 997 { 998 struct tty *tp = arg; 999 1000 sx_xlock(&tty_list_sx); 1001 TAILQ_REMOVE(&tty_list, tp, t_list); 1002 tty_list_count--; 1003 sx_xunlock(&tty_list_sx); 1004 1005 /* Make sure we haven't leaked buffers. */ 1006 MPASS(ttyinq_getsize(&tp->t_inq) == 0); 1007 MPASS(ttyoutq_getsize(&tp->t_outq) == 0); 1008 1009 knlist_destroy(&tp->t_inpoll.si_note); 1010 knlist_destroy(&tp->t_outpoll.si_note); 1011 1012 cv_destroy(&tp->t_inwait); 1013 cv_destroy(&tp->t_outwait); 1014 cv_destroy(&tp->t_bgwait); 1015 cv_destroy(&tp->t_dcdwait); 1016 cv_destroy(&tp->t_outserwait); 1017 1018 if (tp->t_mtx == &tp->t_mtxobj) 1019 mtx_destroy(&tp->t_mtxobj); 1020 ttydevsw_free(tp); 1021 free(tp, M_TTY); 1022 } 1023 1024 static void 1025 tty_rel_free(struct tty *tp) 1026 { 1027 struct cdev *dev; 1028 1029 tty_lock_assert(tp, MA_OWNED); 1030 1031 #define TF_ACTIVITY (TF_GONE|TF_OPENED|TF_HOOK|TF_OPENCLOSE) 1032 if (tp->t_sessioncnt != 0 || (tp->t_flags & TF_ACTIVITY) != TF_GONE) { 1033 /* TTY is still in use. */ 1034 tty_unlock(tp); 1035 return; 1036 } 1037 1038 /* TTY can be deallocated. */ 1039 dev = tp->t_dev; 1040 tp->t_dev = NULL; 1041 tty_unlock(tp); 1042 1043 destroy_dev_sched_cb(dev, tty_dealloc, tp); 1044 } 1045 1046 void 1047 tty_rel_pgrp(struct tty *tp, struct pgrp *pg) 1048 { 1049 MPASS(tp->t_sessioncnt > 0); 1050 tty_lock_assert(tp, MA_OWNED); 1051 1052 if (tp->t_pgrp == pg) 1053 tp->t_pgrp = NULL; 1054 1055 tty_unlock(tp); 1056 } 1057 1058 void 1059 tty_rel_sess(struct tty *tp, struct session *sess) 1060 { 1061 MPASS(tp->t_sessioncnt > 0); 1062 1063 /* Current session has left. */ 1064 if (tp->t_session == sess) { 1065 tp->t_session = NULL; 1066 MPASS(tp->t_pgrp == NULL); 1067 } 1068 tp->t_sessioncnt--; 1069 tty_rel_free(tp); 1070 } 1071 1072 void 1073 tty_rel_gone(struct tty *tp) 1074 { 1075 MPASS(!tty_gone(tp)); 1076 1077 /* Simulate carrier removal. */ 1078 ttydisc_modem(tp, 0); 1079 1080 /* Wake up all blocked threads. */ 1081 tty_wakeup(tp, FREAD|FWRITE); 1082 cv_broadcast(&tp->t_bgwait); 1083 cv_broadcast(&tp->t_dcdwait); 1084 1085 tp->t_flags |= TF_GONE; 1086 tty_rel_free(tp); 1087 } 1088 1089 /* 1090 * Exposing information about current TTY's through sysctl 1091 */ 1092 1093 static void 1094 tty_to_xtty(struct tty *tp, struct xtty *xt) 1095 { 1096 tty_lock_assert(tp, MA_OWNED); 1097 1098 xt->xt_size = sizeof(struct xtty); 1099 xt->xt_insize = ttyinq_getsize(&tp->t_inq); 1100 xt->xt_incc = ttyinq_bytescanonicalized(&tp->t_inq); 1101 xt->xt_inlc = ttyinq_bytesline(&tp->t_inq); 1102 xt->xt_inlow = tp->t_inlow; 1103 xt->xt_outsize = ttyoutq_getsize(&tp->t_outq); 1104 xt->xt_outcc = ttyoutq_bytesused(&tp->t_outq); 1105 xt->xt_outlow = tp->t_outlow; 1106 xt->xt_column = tp->t_column; 1107 xt->xt_pgid = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 1108 xt->xt_sid = tp->t_session ? tp->t_session->s_sid : 0; 1109 xt->xt_flags = tp->t_flags; 1110 xt->xt_dev = tp->t_dev ? dev2udev(tp->t_dev) : NODEV; 1111 } 1112 1113 static int 1114 sysctl_kern_ttys(SYSCTL_HANDLER_ARGS) 1115 { 1116 unsigned long lsize; 1117 struct xtty *xtlist, *xt; 1118 struct tty *tp; 1119 int error; 1120 1121 sx_slock(&tty_list_sx); 1122 lsize = tty_list_count * sizeof(struct xtty); 1123 if (lsize == 0) { 1124 sx_sunlock(&tty_list_sx); 1125 return (0); 1126 } 1127 1128 xtlist = xt = malloc(lsize, M_TTY, M_WAITOK); 1129 1130 TAILQ_FOREACH(tp, &tty_list, t_list) { 1131 tty_lock(tp); 1132 tty_to_xtty(tp, xt); 1133 tty_unlock(tp); 1134 xt++; 1135 } 1136 sx_sunlock(&tty_list_sx); 1137 1138 error = SYSCTL_OUT(req, xtlist, lsize); 1139 free(xtlist, M_TTY); 1140 return (error); 1141 } 1142 1143 SYSCTL_PROC(_kern, OID_AUTO, ttys, CTLTYPE_OPAQUE|CTLFLAG_RD|CTLFLAG_MPSAFE, 1144 0, 0, sysctl_kern_ttys, "S,xtty", "List of TTYs"); 1145 1146 /* 1147 * Device node creation. Device has been set up, now we can expose it to 1148 * the user. 1149 */ 1150 1151 void 1152 tty_makedev(struct tty *tp, struct ucred *cred, const char *fmt, ...) 1153 { 1154 va_list ap; 1155 struct cdev *dev; 1156 const char *prefix = "tty"; 1157 char name[SPECNAMELEN - 3]; /* for "tty" and "cua". */ 1158 uid_t uid; 1159 gid_t gid; 1160 mode_t mode; 1161 1162 /* Remove "tty" prefix from devices like PTY's. */ 1163 if (tp->t_flags & TF_NOPREFIX) 1164 prefix = ""; 1165 1166 va_start(ap, fmt); 1167 vsnrprintf(name, sizeof name, 32, fmt, ap); 1168 va_end(ap); 1169 1170 if (cred == NULL) { 1171 /* System device. */ 1172 uid = UID_ROOT; 1173 gid = GID_WHEEL; 1174 mode = S_IRUSR|S_IWUSR; 1175 } else { 1176 /* User device. */ 1177 uid = cred->cr_ruid; 1178 gid = GID_TTY; 1179 mode = S_IRUSR|S_IWUSR|S_IWGRP; 1180 } 1181 1182 /* Master call-in device. */ 1183 dev = make_dev_cred(&ttydev_cdevsw, 0, cred, 1184 uid, gid, mode, "%s%s", prefix, name); 1185 dev->si_drv1 = tp; 1186 tp->t_dev = dev; 1187 1188 /* Slave call-in devices. */ 1189 if (tp->t_flags & TF_INITLOCK) { 1190 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1191 uid, gid, mode, "%s%s.init", prefix, name); 1192 dev_depends(tp->t_dev, dev); 1193 dev->si_drv1 = tp; 1194 dev->si_drv2 = &tp->t_termios_init_in; 1195 1196 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1197 uid, gid, mode, "%s%s.lock", prefix, name); 1198 dev_depends(tp->t_dev, dev); 1199 dev->si_drv1 = tp; 1200 dev->si_drv2 = &tp->t_termios_lock_in; 1201 } 1202 1203 /* Call-out devices. */ 1204 if (tp->t_flags & TF_CALLOUT) { 1205 dev = make_dev_cred(&ttydev_cdevsw, 0, cred, 1206 UID_UUCP, GID_DIALER, 0660, "cua%s", name); 1207 dev_depends(tp->t_dev, dev); 1208 dev->si_drv1 = tp; 1209 1210 /* Slave call-out devices. */ 1211 if (tp->t_flags & TF_INITLOCK) { 1212 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1213 UID_UUCP, GID_DIALER, 0660, "cua%s.init", name); 1214 dev_depends(tp->t_dev, dev); 1215 dev->si_drv1 = tp; 1216 dev->si_drv2 = &tp->t_termios_init_out; 1217 1218 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1219 UID_UUCP, GID_DIALER, 0660, "cua%s.lock", name); 1220 dev_depends(tp->t_dev, dev); 1221 dev->si_drv1 = tp; 1222 dev->si_drv2 = &tp->t_termios_lock_out; 1223 } 1224 } 1225 } 1226 1227 /* 1228 * Signalling processes. 1229 */ 1230 1231 void 1232 tty_signal_sessleader(struct tty *tp, int sig) 1233 { 1234 struct proc *p; 1235 1236 tty_lock_assert(tp, MA_OWNED); 1237 MPASS(sig >= 1 && sig < NSIG); 1238 1239 /* Make signals start output again. */ 1240 tp->t_flags &= ~TF_STOPPED; 1241 1242 if (tp->t_session != NULL && tp->t_session->s_leader != NULL) { 1243 p = tp->t_session->s_leader; 1244 PROC_LOCK(p); 1245 psignal(p, sig); 1246 PROC_UNLOCK(p); 1247 } 1248 } 1249 1250 void 1251 tty_signal_pgrp(struct tty *tp, int sig) 1252 { 1253 ksiginfo_t ksi; 1254 1255 tty_lock_assert(tp, MA_OWNED); 1256 MPASS(sig >= 1 && sig < NSIG); 1257 1258 /* Make signals start output again. */ 1259 tp->t_flags &= ~TF_STOPPED; 1260 1261 if (sig == SIGINFO && !(tp->t_termios.c_lflag & NOKERNINFO)) 1262 tty_info(tp); 1263 if (tp->t_pgrp != NULL) { 1264 ksiginfo_init(&ksi); 1265 ksi.ksi_signo = sig; 1266 ksi.ksi_code = SI_KERNEL; 1267 PGRP_LOCK(tp->t_pgrp); 1268 pgsignal(tp->t_pgrp, sig, 1, &ksi); 1269 PGRP_UNLOCK(tp->t_pgrp); 1270 } 1271 } 1272 1273 void 1274 tty_wakeup(struct tty *tp, int flags) 1275 { 1276 if (tp->t_flags & TF_ASYNC && tp->t_sigio != NULL) 1277 pgsigio(&tp->t_sigio, SIGIO, (tp->t_session != NULL)); 1278 1279 if (flags & FWRITE) { 1280 cv_broadcast(&tp->t_outwait); 1281 selwakeup(&tp->t_outpoll); 1282 KNOTE_LOCKED(&tp->t_outpoll.si_note, 0); 1283 } 1284 if (flags & FREAD) { 1285 cv_broadcast(&tp->t_inwait); 1286 selwakeup(&tp->t_inpoll); 1287 KNOTE_LOCKED(&tp->t_inpoll.si_note, 0); 1288 } 1289 } 1290 1291 int 1292 tty_wait(struct tty *tp, struct cv *cv) 1293 { 1294 int error; 1295 int revokecnt = tp->t_revokecnt; 1296 1297 tty_lock_assert(tp, MA_OWNED|MA_NOTRECURSED); 1298 MPASS(!tty_gone(tp)); 1299 1300 error = cv_wait_sig(cv, tp->t_mtx); 1301 1302 /* Restart the system call when we may have been revoked. */ 1303 if (tp->t_revokecnt != revokecnt) 1304 return (ERESTART); 1305 1306 /* Bail out when the device slipped away. */ 1307 if (tty_gone(tp)) 1308 return (ENXIO); 1309 1310 return (error); 1311 } 1312 1313 int 1314 tty_timedwait(struct tty *tp, struct cv *cv, int hz) 1315 { 1316 int error; 1317 int revokecnt = tp->t_revokecnt; 1318 1319 tty_lock_assert(tp, MA_OWNED|MA_NOTRECURSED); 1320 MPASS(!tty_gone(tp)); 1321 1322 error = cv_timedwait_sig(cv, tp->t_mtx, hz); 1323 1324 /* Restart the system call when we may have been revoked. */ 1325 if (tp->t_revokecnt != revokecnt) 1326 return (ERESTART); 1327 1328 /* Bail out when the device slipped away. */ 1329 if (tty_gone(tp)) 1330 return (ENXIO); 1331 1332 return (error); 1333 } 1334 1335 void 1336 tty_flush(struct tty *tp, int flags) 1337 { 1338 if (flags & FWRITE) { 1339 tp->t_flags &= ~TF_HIWAT_OUT; 1340 ttyoutq_flush(&tp->t_outq); 1341 tty_wakeup(tp, FWRITE); 1342 ttydevsw_pktnotify(tp, TIOCPKT_FLUSHWRITE); 1343 } 1344 if (flags & FREAD) { 1345 tty_hiwat_in_unblock(tp); 1346 ttyinq_flush(&tp->t_inq); 1347 ttydevsw_inwakeup(tp); 1348 ttydevsw_pktnotify(tp, TIOCPKT_FLUSHREAD); 1349 } 1350 } 1351 1352 static int 1353 tty_generic_ioctl(struct tty *tp, u_long cmd, void *data, struct thread *td) 1354 { 1355 int error; 1356 1357 switch (cmd) { 1358 /* 1359 * Modem commands. 1360 * The SER_* and TIOCM_* flags are the same, but one bit 1361 * shifted. I don't know why. 1362 */ 1363 case TIOCSDTR: 1364 ttydevsw_modem(tp, SER_DTR, 0); 1365 return (0); 1366 case TIOCCDTR: 1367 ttydevsw_modem(tp, 0, SER_DTR); 1368 return (0); 1369 case TIOCMSET: { 1370 int bits = *(int *)data; 1371 ttydevsw_modem(tp, 1372 (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1, 1373 ((~bits) & (TIOCM_DTR | TIOCM_RTS)) >> 1); 1374 return (0); 1375 } 1376 case TIOCMBIS: { 1377 int bits = *(int *)data; 1378 ttydevsw_modem(tp, (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1, 0); 1379 return (0); 1380 } 1381 case TIOCMBIC: { 1382 int bits = *(int *)data; 1383 ttydevsw_modem(tp, 0, (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1); 1384 return (0); 1385 } 1386 case TIOCMGET: 1387 *(int *)data = TIOCM_LE + (ttydevsw_modem(tp, 0, 0) << 1); 1388 return (0); 1389 1390 case FIOASYNC: 1391 if (*(int *)data) 1392 tp->t_flags |= TF_ASYNC; 1393 else 1394 tp->t_flags &= ~TF_ASYNC; 1395 return (0); 1396 case FIONBIO: 1397 /* This device supports non-blocking operation. */ 1398 return (0); 1399 case FIONREAD: 1400 *(int *)data = ttyinq_bytescanonicalized(&tp->t_inq); 1401 return (0); 1402 case FIONWRITE: 1403 case TIOCOUTQ: 1404 *(int *)data = ttyoutq_bytesused(&tp->t_outq); 1405 return (0); 1406 case FIOSETOWN: 1407 if (tp->t_session != NULL && !tty_is_ctty(tp, td->td_proc)) 1408 /* Not allowed to set ownership. */ 1409 return (ENOTTY); 1410 1411 /* Temporarily unlock the TTY to set ownership. */ 1412 tty_unlock(tp); 1413 error = fsetown(*(int *)data, &tp->t_sigio); 1414 tty_lock(tp); 1415 return (error); 1416 case FIOGETOWN: 1417 if (tp->t_session != NULL && !tty_is_ctty(tp, td->td_proc)) 1418 /* Not allowed to set ownership. */ 1419 return (ENOTTY); 1420 1421 /* Get ownership. */ 1422 *(int *)data = fgetown(&tp->t_sigio); 1423 return (0); 1424 case TIOCGETA: 1425 /* Obtain terminal flags through tcgetattr(). */ 1426 *(struct termios*)data = tp->t_termios; 1427 return (0); 1428 case TIOCSETA: 1429 case TIOCSETAW: 1430 case TIOCSETAF: { 1431 struct termios *t = data; 1432 1433 /* 1434 * Who makes up these funny rules? According to POSIX, 1435 * input baud rate is set equal to the output baud rate 1436 * when zero. 1437 */ 1438 if (t->c_ispeed == 0) 1439 t->c_ispeed = t->c_ospeed; 1440 1441 /* Discard any unsupported bits. */ 1442 t->c_iflag &= TTYSUP_IFLAG; 1443 t->c_oflag &= TTYSUP_OFLAG; 1444 t->c_lflag &= TTYSUP_LFLAG; 1445 t->c_cflag &= TTYSUP_CFLAG; 1446 1447 /* Set terminal flags through tcsetattr(). */ 1448 if (cmd == TIOCSETAW || cmd == TIOCSETAF) { 1449 error = tty_drain(tp); 1450 if (error) 1451 return (error); 1452 if (cmd == TIOCSETAF) 1453 tty_flush(tp, FREAD); 1454 } 1455 1456 /* 1457 * Only call param() when the flags really change. 1458 */ 1459 if ((t->c_cflag & CIGNORE) == 0 && 1460 (tp->t_termios.c_cflag != t->c_cflag || 1461 tp->t_termios.c_ispeed != t->c_ispeed || 1462 tp->t_termios.c_ospeed != t->c_ospeed)) { 1463 error = ttydevsw_param(tp, t); 1464 if (error) 1465 return (error); 1466 1467 /* XXX: CLOCAL? */ 1468 1469 tp->t_termios.c_cflag = t->c_cflag & ~CIGNORE; 1470 tp->t_termios.c_ispeed = t->c_ispeed; 1471 tp->t_termios.c_ospeed = t->c_ospeed; 1472 1473 /* Baud rate has changed - update watermarks. */ 1474 tty_watermarks(tp); 1475 } 1476 1477 /* Copy new non-device driver parameters. */ 1478 tp->t_termios.c_iflag = t->c_iflag; 1479 tp->t_termios.c_oflag = t->c_oflag; 1480 tp->t_termios.c_lflag = t->c_lflag; 1481 memcpy(&tp->t_termios.c_cc, t->c_cc, sizeof t->c_cc); 1482 1483 ttydisc_optimize(tp); 1484 1485 if ((t->c_lflag & ICANON) == 0) { 1486 /* 1487 * When in non-canonical mode, wake up all 1488 * readers. Canonicalize any partial input. VMIN 1489 * and VTIME could also be adjusted. 1490 */ 1491 ttyinq_canonicalize(&tp->t_inq); 1492 tty_wakeup(tp, FREAD); 1493 } 1494 1495 /* 1496 * For packet mode: notify the PTY consumer that VSTOP 1497 * and VSTART may have been changed. 1498 */ 1499 if (tp->t_termios.c_iflag & IXON && 1500 tp->t_termios.c_cc[VSTOP] == CTRL('S') && 1501 tp->t_termios.c_cc[VSTART] == CTRL('Q')) 1502 ttydevsw_pktnotify(tp, TIOCPKT_DOSTOP); 1503 else 1504 ttydevsw_pktnotify(tp, TIOCPKT_NOSTOP); 1505 return (0); 1506 } 1507 case TIOCGETD: 1508 /* For compatibility - we only support TTYDISC. */ 1509 *(int *)data = TTYDISC; 1510 return (0); 1511 case TIOCGPGRP: 1512 if (!tty_is_ctty(tp, td->td_proc)) 1513 return (ENOTTY); 1514 1515 if (tp->t_pgrp != NULL) 1516 *(int *)data = tp->t_pgrp->pg_id; 1517 else 1518 *(int *)data = NO_PID; 1519 return (0); 1520 case TIOCGSID: 1521 if (!tty_is_ctty(tp, td->td_proc)) 1522 return (ENOTTY); 1523 1524 MPASS(tp->t_session); 1525 *(int *)data = tp->t_session->s_sid; 1526 return (0); 1527 case TIOCSCTTY: { 1528 struct proc *p = td->td_proc; 1529 1530 /* XXX: This looks awful. */ 1531 tty_unlock(tp); 1532 sx_xlock(&proctree_lock); 1533 tty_lock(tp); 1534 1535 if (!SESS_LEADER(p)) { 1536 /* Only the session leader may do this. */ 1537 sx_xunlock(&proctree_lock); 1538 return (EPERM); 1539 } 1540 1541 if (tp->t_session != NULL && tp->t_session == p->p_session) { 1542 /* This is already our controlling TTY. */ 1543 sx_xunlock(&proctree_lock); 1544 return (0); 1545 } 1546 1547 if (p->p_session->s_ttyp != NULL || 1548 (tp->t_session != NULL && tp->t_session->s_ttyvp != NULL && 1549 tp->t_session->s_ttyvp->v_type != VBAD)) { 1550 /* 1551 * There is already a relation between a TTY and 1552 * a session, or the caller is not the session 1553 * leader. 1554 * 1555 * Allow the TTY to be stolen when the vnode is 1556 * invalid, but the reference to the TTY is 1557 * still active. This allows immediate reuse of 1558 * TTYs of which the session leader has been 1559 * killed or the TTY revoked. 1560 */ 1561 sx_xunlock(&proctree_lock); 1562 return (EPERM); 1563 } 1564 1565 /* Connect the session to the TTY. */ 1566 tp->t_session = p->p_session; 1567 tp->t_session->s_ttyp = tp; 1568 tp->t_sessioncnt++; 1569 sx_xunlock(&proctree_lock); 1570 1571 /* Assign foreground process group. */ 1572 tp->t_pgrp = p->p_pgrp; 1573 PROC_LOCK(p); 1574 p->p_flag |= P_CONTROLT; 1575 PROC_UNLOCK(p); 1576 1577 return (0); 1578 } 1579 case TIOCSPGRP: { 1580 struct pgrp *pg; 1581 1582 /* 1583 * XXX: Temporarily unlock the TTY to locate the process 1584 * group. This code would be lot nicer if we would ever 1585 * decompose proctree_lock. 1586 */ 1587 tty_unlock(tp); 1588 sx_slock(&proctree_lock); 1589 pg = pgfind(*(int *)data); 1590 if (pg != NULL) 1591 PGRP_UNLOCK(pg); 1592 if (pg == NULL || pg->pg_session != td->td_proc->p_session) { 1593 sx_sunlock(&proctree_lock); 1594 tty_lock(tp); 1595 return (EPERM); 1596 } 1597 tty_lock(tp); 1598 1599 /* 1600 * Determine if this TTY is the controlling TTY after 1601 * relocking the TTY. 1602 */ 1603 if (!tty_is_ctty(tp, td->td_proc)) { 1604 sx_sunlock(&proctree_lock); 1605 return (ENOTTY); 1606 } 1607 tp->t_pgrp = pg; 1608 sx_sunlock(&proctree_lock); 1609 1610 /* Wake up the background process groups. */ 1611 cv_broadcast(&tp->t_bgwait); 1612 return (0); 1613 } 1614 case TIOCFLUSH: { 1615 int flags = *(int *)data; 1616 1617 if (flags == 0) 1618 flags = (FREAD|FWRITE); 1619 else 1620 flags &= (FREAD|FWRITE); 1621 tty_flush(tp, flags); 1622 return (0); 1623 } 1624 case TIOCDRAIN: 1625 /* Drain TTY output. */ 1626 return tty_drain(tp); 1627 case TIOCCONS: 1628 /* Set terminal as console TTY. */ 1629 if (*(int *)data) { 1630 error = priv_check(td, PRIV_TTY_CONSOLE); 1631 if (error) 1632 return (error); 1633 1634 /* 1635 * XXX: constty should really need to be locked! 1636 * XXX: allow disconnected constty's to be stolen! 1637 */ 1638 1639 if (constty == tp) 1640 return (0); 1641 if (constty != NULL) 1642 return (EBUSY); 1643 1644 tty_unlock(tp); 1645 constty_set(tp); 1646 tty_lock(tp); 1647 } else if (constty == tp) { 1648 constty_clear(); 1649 } 1650 return (0); 1651 case TIOCGWINSZ: 1652 /* Obtain window size. */ 1653 *(struct winsize*)data = tp->t_winsize; 1654 return (0); 1655 case TIOCSWINSZ: 1656 /* Set window size. */ 1657 if (bcmp(&tp->t_winsize, data, sizeof(struct winsize)) == 0) 1658 return (0); 1659 tp->t_winsize = *(struct winsize*)data; 1660 tty_signal_pgrp(tp, SIGWINCH); 1661 return (0); 1662 case TIOCEXCL: 1663 tp->t_flags |= TF_EXCLUDE; 1664 return (0); 1665 case TIOCNXCL: 1666 tp->t_flags &= ~TF_EXCLUDE; 1667 return (0); 1668 case TIOCSTOP: 1669 tp->t_flags |= TF_STOPPED; 1670 ttydevsw_pktnotify(tp, TIOCPKT_STOP); 1671 return (0); 1672 case TIOCSTART: 1673 tp->t_flags &= ~TF_STOPPED; 1674 ttydevsw_outwakeup(tp); 1675 ttydevsw_pktnotify(tp, TIOCPKT_START); 1676 return (0); 1677 case TIOCSTAT: 1678 tty_info(tp); 1679 return (0); 1680 } 1681 1682 #ifdef COMPAT_43TTY 1683 return tty_ioctl_compat(tp, cmd, data, td); 1684 #else /* !COMPAT_43TTY */ 1685 return (ENOIOCTL); 1686 #endif /* COMPAT_43TTY */ 1687 } 1688 1689 int 1690 tty_ioctl(struct tty *tp, u_long cmd, void *data, struct thread *td) 1691 { 1692 int error; 1693 1694 tty_lock_assert(tp, MA_OWNED); 1695 1696 if (tty_gone(tp)) 1697 return (ENXIO); 1698 1699 error = ttydevsw_ioctl(tp, cmd, data, td); 1700 if (error == ENOIOCTL) 1701 error = tty_generic_ioctl(tp, cmd, data, td); 1702 1703 return (error); 1704 } 1705 1706 dev_t 1707 tty_udev(struct tty *tp) 1708 { 1709 if (tp->t_dev) 1710 return dev2udev(tp->t_dev); 1711 else 1712 return NODEV; 1713 } 1714 1715 int 1716 tty_checkoutq(struct tty *tp) 1717 { 1718 1719 /* 256 bytes should be enough to print a log message. */ 1720 return (ttyoutq_bytesleft(&tp->t_outq) >= 256); 1721 } 1722 1723 void 1724 tty_hiwat_in_block(struct tty *tp) 1725 { 1726 1727 if ((tp->t_flags & TF_HIWAT_IN) == 0 && 1728 tp->t_termios.c_iflag & IXOFF && 1729 tp->t_termios.c_cc[VSTOP] != _POSIX_VDISABLE) { 1730 /* 1731 * Input flow control. Only enter the high watermark when we 1732 * can successfully store the VSTOP character. 1733 */ 1734 if (ttyoutq_write_nofrag(&tp->t_outq, 1735 &tp->t_termios.c_cc[VSTOP], 1) == 0) 1736 tp->t_flags |= TF_HIWAT_IN; 1737 } else { 1738 /* No input flow control. */ 1739 tp->t_flags |= TF_HIWAT_IN; 1740 } 1741 } 1742 1743 void 1744 tty_hiwat_in_unblock(struct tty *tp) 1745 { 1746 1747 if (tp->t_flags & TF_HIWAT_IN && 1748 tp->t_termios.c_iflag & IXOFF && 1749 tp->t_termios.c_cc[VSTART] != _POSIX_VDISABLE) { 1750 /* 1751 * Input flow control. Only leave the high watermark when we 1752 * can successfully store the VSTART character. 1753 */ 1754 if (ttyoutq_write_nofrag(&tp->t_outq, 1755 &tp->t_termios.c_cc[VSTART], 1) == 0) 1756 tp->t_flags &= ~TF_HIWAT_IN; 1757 } else { 1758 /* No input flow control. */ 1759 tp->t_flags &= ~TF_HIWAT_IN; 1760 } 1761 1762 if (!tty_gone(tp)) 1763 ttydevsw_inwakeup(tp); 1764 } 1765 1766 /* 1767 * TTY hooks interface. 1768 */ 1769 1770 static int 1771 ttyhook_defrint(struct tty *tp, char c, int flags) 1772 { 1773 1774 if (ttyhook_rint_bypass(tp, &c, 1) != 1) 1775 return (-1); 1776 1777 return (0); 1778 } 1779 1780 int 1781 ttyhook_register(struct tty **rtp, struct proc *p, int fd, 1782 struct ttyhook *th, void *softc) 1783 { 1784 struct tty *tp; 1785 struct file *fp; 1786 struct cdev *dev; 1787 struct cdevsw *cdp; 1788 struct filedesc *fdp; 1789 int error; 1790 1791 /* Validate the file descriptor. */ 1792 if ((fdp = p->p_fd) == NULL) 1793 return (EBADF); 1794 1795 fp = fget_unlocked(fdp, fd); 1796 if (fp == NULL) 1797 return (EBADF); 1798 if (fp->f_ops == &badfileops) { 1799 error = EBADF; 1800 goto done1; 1801 } 1802 1803 /* 1804 * Make sure the vnode is bound to a character device. 1805 * Unlocked check for the vnode type is ok there, because we 1806 * only shall prevent calling devvn_refthread on the file that 1807 * never has been opened over a character device. 1808 */ 1809 if (fp->f_type != DTYPE_VNODE || fp->f_vnode->v_type != VCHR) { 1810 error = EINVAL; 1811 goto done1; 1812 } 1813 1814 /* Make sure it is a TTY. */ 1815 cdp = devvn_refthread(fp->f_vnode, &dev); 1816 if (cdp == NULL) { 1817 error = ENXIO; 1818 goto done1; 1819 } 1820 if (dev != fp->f_data) { 1821 error = ENXIO; 1822 goto done2; 1823 } 1824 if (cdp != &ttydev_cdevsw) { 1825 error = ENOTTY; 1826 goto done2; 1827 } 1828 tp = dev->si_drv1; 1829 1830 /* Try to attach the hook to the TTY. */ 1831 error = EBUSY; 1832 tty_lock(tp); 1833 MPASS((tp->t_hook == NULL) == ((tp->t_flags & TF_HOOK) == 0)); 1834 if (tp->t_flags & TF_HOOK) 1835 goto done3; 1836 1837 tp->t_flags |= TF_HOOK; 1838 tp->t_hook = th; 1839 tp->t_hooksoftc = softc; 1840 *rtp = tp; 1841 error = 0; 1842 1843 /* Maybe we can switch into bypass mode now. */ 1844 ttydisc_optimize(tp); 1845 1846 /* Silently convert rint() calls to rint_bypass() when possible. */ 1847 if (!ttyhook_hashook(tp, rint) && ttyhook_hashook(tp, rint_bypass)) 1848 th->th_rint = ttyhook_defrint; 1849 1850 done3: tty_unlock(tp); 1851 done2: dev_relthread(dev); 1852 done1: fdrop(fp, curthread); 1853 return (error); 1854 } 1855 1856 void 1857 ttyhook_unregister(struct tty *tp) 1858 { 1859 1860 tty_lock_assert(tp, MA_OWNED); 1861 MPASS(tp->t_flags & TF_HOOK); 1862 1863 /* Disconnect the hook. */ 1864 tp->t_flags &= ~TF_HOOK; 1865 tp->t_hook = NULL; 1866 1867 /* Maybe we need to leave bypass mode. */ 1868 ttydisc_optimize(tp); 1869 1870 /* Maybe deallocate the TTY as well. */ 1871 tty_rel_free(tp); 1872 } 1873 1874 /* 1875 * /dev/console handling. 1876 */ 1877 1878 static int 1879 ttyconsdev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 1880 { 1881 struct tty *tp; 1882 1883 /* System has no console device. */ 1884 if (dev_console_filename == NULL) 1885 return (ENXIO); 1886 1887 /* Look up corresponding TTY by device name. */ 1888 sx_slock(&tty_list_sx); 1889 TAILQ_FOREACH(tp, &tty_list, t_list) { 1890 if (strcmp(dev_console_filename, tty_devname(tp)) == 0) { 1891 dev_console->si_drv1 = tp; 1892 break; 1893 } 1894 } 1895 sx_sunlock(&tty_list_sx); 1896 1897 /* System console has no TTY associated. */ 1898 if (dev_console->si_drv1 == NULL) 1899 return (ENXIO); 1900 1901 return (ttydev_open(dev, oflags, devtype, td)); 1902 } 1903 1904 static int 1905 ttyconsdev_write(struct cdev *dev, struct uio *uio, int ioflag) 1906 { 1907 1908 log_console(uio); 1909 1910 return (ttydev_write(dev, uio, ioflag)); 1911 } 1912 1913 /* 1914 * /dev/console is a little different than normal TTY's. When opened, 1915 * it determines which TTY to use. When data gets written to it, it 1916 * will be logged in the kernel message buffer. 1917 */ 1918 static struct cdevsw ttyconsdev_cdevsw = { 1919 .d_version = D_VERSION, 1920 .d_open = ttyconsdev_open, 1921 .d_close = ttydev_close, 1922 .d_read = ttydev_read, 1923 .d_write = ttyconsdev_write, 1924 .d_ioctl = ttydev_ioctl, 1925 .d_kqfilter = ttydev_kqfilter, 1926 .d_poll = ttydev_poll, 1927 .d_mmap = ttydev_mmap, 1928 .d_name = "ttyconsdev", 1929 .d_flags = D_TTY, 1930 }; 1931 1932 static void 1933 ttyconsdev_init(void *unused) 1934 { 1935 1936 dev_console = make_dev(&ttyconsdev_cdevsw, 0, UID_ROOT, GID_WHEEL, 1937 0600, "console"); 1938 } 1939 1940 SYSINIT(tty, SI_SUB_DRIVERS, SI_ORDER_FIRST, ttyconsdev_init, NULL); 1941 1942 void 1943 ttyconsdev_select(const char *name) 1944 { 1945 1946 dev_console_filename = name; 1947 } 1948 1949 /* 1950 * Debugging routines. 1951 */ 1952 1953 #include "opt_ddb.h" 1954 #ifdef DDB 1955 #include <ddb/ddb.h> 1956 #include <ddb/db_sym.h> 1957 1958 static struct { 1959 int flag; 1960 char val; 1961 } ttystates[] = { 1962 #if 0 1963 { TF_NOPREFIX, 'N' }, 1964 #endif 1965 { TF_INITLOCK, 'I' }, 1966 { TF_CALLOUT, 'C' }, 1967 1968 /* Keep these together -> 'Oi' and 'Oo'. */ 1969 { TF_OPENED, 'O' }, 1970 { TF_OPENED_IN, 'i' }, 1971 { TF_OPENED_OUT, 'o' }, 1972 { TF_OPENED_CONS, 'c' }, 1973 1974 { TF_GONE, 'G' }, 1975 { TF_OPENCLOSE, 'B' }, 1976 { TF_ASYNC, 'Y' }, 1977 { TF_LITERAL, 'L' }, 1978 1979 /* Keep these together -> 'Hi' and 'Ho'. */ 1980 { TF_HIWAT, 'H' }, 1981 { TF_HIWAT_IN, 'i' }, 1982 { TF_HIWAT_OUT, 'o' }, 1983 1984 { TF_STOPPED, 'S' }, 1985 { TF_EXCLUDE, 'X' }, 1986 { TF_BYPASS, 'l' }, 1987 { TF_ZOMBIE, 'Z' }, 1988 { TF_HOOK, 's' }, 1989 1990 /* Keep these together -> 'bi' and 'bo'. */ 1991 { TF_BUSY, 'b' }, 1992 { TF_BUSY_IN, 'i' }, 1993 { TF_BUSY_OUT, 'o' }, 1994 1995 { 0, '\0'}, 1996 }; 1997 1998 #define TTY_FLAG_BITS \ 1999 "\20\1NOPREFIX\2INITLOCK\3CALLOUT\4OPENED_IN\5OPENED_OUT\6GONE" \ 2000 "\7OPENCLOSE\10ASYNC\11LITERAL\12HIWAT_IN\13HIWAT_OUT\14STOPPED" \ 2001 "\15EXCLUDE\16BYPASS\17ZOMBIE\20HOOK" 2002 2003 #define DB_PRINTSYM(name, addr) \ 2004 db_printf("%s " #name ": ", sep); \ 2005 db_printsym((db_addr_t) addr, DB_STGY_ANY); \ 2006 db_printf("\n"); 2007 2008 static void 2009 _db_show_devsw(const char *sep, const struct ttydevsw *tsw) 2010 { 2011 db_printf("%sdevsw: ", sep); 2012 db_printsym((db_addr_t)tsw, DB_STGY_ANY); 2013 db_printf(" (%p)\n", tsw); 2014 DB_PRINTSYM(open, tsw->tsw_open); 2015 DB_PRINTSYM(close, tsw->tsw_close); 2016 DB_PRINTSYM(outwakeup, tsw->tsw_outwakeup); 2017 DB_PRINTSYM(inwakeup, tsw->tsw_inwakeup); 2018 DB_PRINTSYM(ioctl, tsw->tsw_ioctl); 2019 DB_PRINTSYM(param, tsw->tsw_param); 2020 DB_PRINTSYM(modem, tsw->tsw_modem); 2021 DB_PRINTSYM(mmap, tsw->tsw_mmap); 2022 DB_PRINTSYM(pktnotify, tsw->tsw_pktnotify); 2023 DB_PRINTSYM(free, tsw->tsw_free); 2024 } 2025 static void 2026 _db_show_hooks(const char *sep, const struct ttyhook *th) 2027 { 2028 db_printf("%shook: ", sep); 2029 db_printsym((db_addr_t)th, DB_STGY_ANY); 2030 db_printf(" (%p)\n", th); 2031 if (th == NULL) 2032 return; 2033 DB_PRINTSYM(rint, th->th_rint); 2034 DB_PRINTSYM(rint_bypass, th->th_rint_bypass); 2035 DB_PRINTSYM(rint_done, th->th_rint_done); 2036 DB_PRINTSYM(rint_poll, th->th_rint_poll); 2037 DB_PRINTSYM(getc_inject, th->th_getc_inject); 2038 DB_PRINTSYM(getc_capture, th->th_getc_capture); 2039 DB_PRINTSYM(getc_poll, th->th_getc_poll); 2040 DB_PRINTSYM(close, th->th_close); 2041 } 2042 2043 static void 2044 _db_show_termios(const char *name, const struct termios *t) 2045 { 2046 2047 db_printf("%s: iflag 0x%x oflag 0x%x cflag 0x%x " 2048 "lflag 0x%x ispeed %u ospeed %u\n", name, 2049 t->c_iflag, t->c_oflag, t->c_cflag, t->c_lflag, 2050 t->c_ispeed, t->c_ospeed); 2051 } 2052 2053 /* DDB command to show TTY statistics. */ 2054 DB_SHOW_COMMAND(tty, db_show_tty) 2055 { 2056 struct tty *tp; 2057 2058 if (!have_addr) { 2059 db_printf("usage: show tty <addr>\n"); 2060 return; 2061 } 2062 tp = (struct tty *)addr; 2063 2064 db_printf("0x%p: %s\n", tp, tty_devname(tp)); 2065 db_printf("\tmtx: %p\n", tp->t_mtx); 2066 db_printf("\tflags: %b\n", tp->t_flags, TTY_FLAG_BITS); 2067 db_printf("\trevokecnt: %u\n", tp->t_revokecnt); 2068 2069 /* Buffering mechanisms. */ 2070 db_printf("\tinq: %p begin %u linestart %u reprint %u end %u " 2071 "nblocks %u quota %u\n", &tp->t_inq, tp->t_inq.ti_begin, 2072 tp->t_inq.ti_linestart, tp->t_inq.ti_reprint, tp->t_inq.ti_end, 2073 tp->t_inq.ti_nblocks, tp->t_inq.ti_quota); 2074 db_printf("\toutq: %p begin %u end %u nblocks %u quota %u\n", 2075 &tp->t_outq, tp->t_outq.to_begin, tp->t_outq.to_end, 2076 tp->t_outq.to_nblocks, tp->t_outq.to_quota); 2077 db_printf("\tinlow: %zu\n", tp->t_inlow); 2078 db_printf("\toutlow: %zu\n", tp->t_outlow); 2079 _db_show_termios("\ttermios", &tp->t_termios); 2080 db_printf("\twinsize: row %u col %u xpixel %u ypixel %u\n", 2081 tp->t_winsize.ws_row, tp->t_winsize.ws_col, 2082 tp->t_winsize.ws_xpixel, tp->t_winsize.ws_ypixel); 2083 db_printf("\tcolumn: %u\n", tp->t_column); 2084 db_printf("\twritepos: %u\n", tp->t_writepos); 2085 db_printf("\tcompatflags: 0x%x\n", tp->t_compatflags); 2086 2087 /* Init/lock-state devices. */ 2088 _db_show_termios("\ttermios_init_in", &tp->t_termios_init_in); 2089 _db_show_termios("\ttermios_init_out", &tp->t_termios_init_out); 2090 _db_show_termios("\ttermios_lock_in", &tp->t_termios_lock_in); 2091 _db_show_termios("\ttermios_lock_out", &tp->t_termios_lock_out); 2092 2093 /* Hooks */ 2094 _db_show_devsw("\t", tp->t_devsw); 2095 _db_show_hooks("\t", tp->t_hook); 2096 2097 /* Process info. */ 2098 db_printf("\tpgrp: %p gid %d jobc %d\n", tp->t_pgrp, 2099 tp->t_pgrp ? tp->t_pgrp->pg_id : 0, 2100 tp->t_pgrp ? tp->t_pgrp->pg_jobc : 0); 2101 db_printf("\tsession: %p", tp->t_session); 2102 if (tp->t_session != NULL) 2103 db_printf(" count %u leader %p tty %p sid %d login %s", 2104 tp->t_session->s_count, tp->t_session->s_leader, 2105 tp->t_session->s_ttyp, tp->t_session->s_sid, 2106 tp->t_session->s_login); 2107 db_printf("\n"); 2108 db_printf("\tsessioncnt: %u\n", tp->t_sessioncnt); 2109 db_printf("\tdevswsoftc: %p\n", tp->t_devswsoftc); 2110 db_printf("\thooksoftc: %p\n", tp->t_hooksoftc); 2111 db_printf("\tdev: %p\n", tp->t_dev); 2112 } 2113 2114 /* DDB command to list TTYs. */ 2115 DB_SHOW_ALL_COMMAND(ttys, db_show_all_ttys) 2116 { 2117 struct tty *tp; 2118 size_t isiz, osiz; 2119 int i, j; 2120 2121 /* Make the output look like `pstat -t'. */ 2122 db_printf("PTR "); 2123 #if defined(__LP64__) 2124 db_printf(" "); 2125 #endif 2126 db_printf(" LINE INQ CAN LIN LOW OUTQ USE LOW " 2127 "COL SESS PGID STATE\n"); 2128 2129 TAILQ_FOREACH(tp, &tty_list, t_list) { 2130 isiz = tp->t_inq.ti_nblocks * TTYINQ_DATASIZE; 2131 osiz = tp->t_outq.to_nblocks * TTYOUTQ_DATASIZE; 2132 2133 db_printf("%p %10s %5zu %4u %4u %4zu %5zu %4u %4zu %5u %5d %5d ", 2134 tp, 2135 tty_devname(tp), 2136 isiz, 2137 tp->t_inq.ti_linestart - tp->t_inq.ti_begin, 2138 tp->t_inq.ti_end - tp->t_inq.ti_linestart, 2139 isiz - tp->t_inlow, 2140 osiz, 2141 tp->t_outq.to_end - tp->t_outq.to_begin, 2142 osiz - tp->t_outlow, 2143 MIN(tp->t_column, 99999), 2144 tp->t_session ? tp->t_session->s_sid : 0, 2145 tp->t_pgrp ? tp->t_pgrp->pg_id : 0); 2146 2147 /* Flag bits. */ 2148 for (i = j = 0; ttystates[i].flag; i++) 2149 if (tp->t_flags & ttystates[i].flag) { 2150 db_printf("%c", ttystates[i].val); 2151 j++; 2152 } 2153 if (j == 0) 2154 db_printf("-"); 2155 db_printf("\n"); 2156 } 2157 } 2158 #endif /* DDB */ 2159