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 ttydevsw_param(tp, &tp->t_termios); 271 /* Prevent modem control on callout devices and /dev/console. */ 272 if (TTY_CALLOUT(tp, dev) || dev == dev_console) 273 tp->t_termios.c_cflag |= CLOCAL; 274 275 ttydevsw_modem(tp, SER_DTR|SER_RTS, 0); 276 277 error = ttydevsw_open(tp); 278 if (error != 0) 279 goto done; 280 281 ttydisc_open(tp); 282 tty_watermarks(tp); 283 } 284 285 /* Wait for Carrier Detect. */ 286 if ((oflags & O_NONBLOCK) == 0 && 287 (tp->t_termios.c_cflag & CLOCAL) == 0) { 288 while ((ttydevsw_modem(tp, 0, 0) & SER_DCD) == 0) { 289 error = tty_wait(tp, &tp->t_dcdwait); 290 if (error != 0) 291 goto done; 292 } 293 } 294 295 if (dev == dev_console) 296 tp->t_flags |= TF_OPENED_CONS; 297 else if (TTY_CALLOUT(tp, dev)) 298 tp->t_flags |= TF_OPENED_OUT; 299 else 300 tp->t_flags |= TF_OPENED_IN; 301 302 done: tp->t_flags &= ~TF_OPENCLOSE; 303 cv_broadcast(&tp->t_dcdwait); 304 ttydev_leave(tp); 305 306 return (error); 307 } 308 309 static int 310 ttydev_close(struct cdev *dev, int fflag, int devtype, struct thread *td) 311 { 312 struct tty *tp = dev->si_drv1; 313 314 tty_lock(tp); 315 316 /* 317 * Don't actually close the device if it is being used as the 318 * console. 319 */ 320 MPASS((tp->t_flags & TF_OPENED) != TF_OPENED); 321 if (dev == dev_console) 322 tp->t_flags &= ~TF_OPENED_CONS; 323 else 324 tp->t_flags &= ~(TF_OPENED_IN|TF_OPENED_OUT); 325 326 if (tp->t_flags & TF_OPENED) { 327 tty_unlock(tp); 328 return (0); 329 } 330 331 /* 332 * This can only be called once. The callin and the callout 333 * devices cannot be opened at the same time. 334 */ 335 tp->t_flags &= ~(TF_EXCLUDE|TF_STOPPED); 336 337 /* Properly wake up threads that are stuck - revoke(). */ 338 tp->t_revokecnt++; 339 tty_wakeup(tp, FREAD|FWRITE); 340 cv_broadcast(&tp->t_bgwait); 341 cv_broadcast(&tp->t_dcdwait); 342 343 ttydev_leave(tp); 344 345 return (0); 346 } 347 348 static __inline int 349 tty_is_ctty(struct tty *tp, struct proc *p) 350 { 351 tty_lock_assert(tp, MA_OWNED); 352 353 return (p->p_session == tp->t_session && p->p_flag & P_CONTROLT); 354 } 355 356 static int 357 tty_wait_background(struct tty *tp, struct thread *td, int sig) 358 { 359 struct proc *p = td->td_proc; 360 struct pgrp *pg; 361 ksiginfo_t ksi; 362 int error; 363 364 MPASS(sig == SIGTTIN || sig == SIGTTOU); 365 tty_lock_assert(tp, MA_OWNED); 366 367 for (;;) { 368 PROC_LOCK(p); 369 /* 370 * The process should only sleep, when: 371 * - This terminal is the controling terminal 372 * - Its process group is not the foreground process 373 * group 374 * - The parent process isn't waiting for the child to 375 * exit 376 * - the signal to send to the process isn't masked 377 */ 378 if (!tty_is_ctty(tp, p) || p->p_pgrp == tp->t_pgrp) { 379 /* Allow the action to happen. */ 380 PROC_UNLOCK(p); 381 return (0); 382 } 383 384 if (SIGISMEMBER(p->p_sigacts->ps_sigignore, sig) || 385 SIGISMEMBER(td->td_sigmask, sig)) { 386 /* Only allow them in write()/ioctl(). */ 387 PROC_UNLOCK(p); 388 return (sig == SIGTTOU ? 0 : EIO); 389 } 390 391 pg = p->p_pgrp; 392 if (p->p_flag & P_PPWAIT || pg->pg_jobc == 0) { 393 /* Don't allow the action to happen. */ 394 PROC_UNLOCK(p); 395 return (EIO); 396 } 397 PROC_UNLOCK(p); 398 399 /* 400 * Send the signal and sleep until we're the new 401 * foreground process group. 402 */ 403 if (sig != 0) { 404 ksiginfo_init(&ksi); 405 ksi.ksi_code = SI_KERNEL; 406 ksi.ksi_signo = sig; 407 sig = 0; 408 } 409 PGRP_LOCK(pg); 410 pgsignal(pg, ksi.ksi_signo, 1, &ksi); 411 PGRP_UNLOCK(pg); 412 413 error = tty_wait(tp, &tp->t_bgwait); 414 if (error) 415 return (error); 416 } 417 } 418 419 static int 420 ttydev_read(struct cdev *dev, struct uio *uio, int ioflag) 421 { 422 struct tty *tp = dev->si_drv1; 423 int error; 424 425 error = ttydev_enter(tp); 426 if (error) 427 goto done; 428 429 error = tty_wait_background(tp, curthread, SIGTTIN); 430 if (error) { 431 tty_unlock(tp); 432 goto done; 433 } 434 435 error = ttydisc_read(tp, uio, ioflag); 436 tty_unlock(tp); 437 438 /* 439 * The read() call should not throw an error when the device is 440 * being destroyed. Silently convert it to an EOF. 441 */ 442 done: if (error == ENXIO) 443 error = 0; 444 return (error); 445 } 446 447 static int 448 ttydev_write(struct cdev *dev, struct uio *uio, int ioflag) 449 { 450 struct tty *tp = dev->si_drv1; 451 int error; 452 453 error = ttydev_enter(tp); 454 if (error) 455 return (error); 456 457 if (tp->t_termios.c_lflag & TOSTOP) { 458 error = tty_wait_background(tp, curthread, SIGTTOU); 459 if (error) 460 goto done; 461 } 462 463 if (ioflag & IO_NDELAY && tp->t_flags & TF_BUSY_OUT) { 464 /* Allow non-blocking writes to bypass serialization. */ 465 error = ttydisc_write(tp, uio, ioflag); 466 } else { 467 /* Serialize write() calls. */ 468 while (tp->t_flags & TF_BUSY_OUT) { 469 error = tty_wait(tp, &tp->t_outserwait); 470 if (error) 471 goto done; 472 } 473 474 tp->t_flags |= TF_BUSY_OUT; 475 error = ttydisc_write(tp, uio, ioflag); 476 tp->t_flags &= ~TF_BUSY_OUT; 477 cv_signal(&tp->t_outserwait); 478 } 479 480 done: tty_unlock(tp); 481 return (error); 482 } 483 484 static int 485 ttydev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, 486 struct thread *td) 487 { 488 struct tty *tp = dev->si_drv1; 489 int error; 490 491 error = ttydev_enter(tp); 492 if (error) 493 return (error); 494 495 switch (cmd) { 496 case TIOCCBRK: 497 case TIOCCONS: 498 case TIOCDRAIN: 499 case TIOCEXCL: 500 case TIOCFLUSH: 501 case TIOCNXCL: 502 case TIOCSBRK: 503 case TIOCSCTTY: 504 case TIOCSETA: 505 case TIOCSETAF: 506 case TIOCSETAW: 507 case TIOCSPGRP: 508 case TIOCSTART: 509 case TIOCSTAT: 510 case TIOCSTI: 511 case TIOCSTOP: 512 case TIOCSWINSZ: 513 #if 0 514 case TIOCSDRAINWAIT: 515 case TIOCSETD: 516 #endif 517 #ifdef COMPAT_43TTY 518 case TIOCLBIC: 519 case TIOCLBIS: 520 case TIOCLSET: 521 case TIOCSETC: 522 case OTIOCSETD: 523 case TIOCSETN: 524 case TIOCSETP: 525 case TIOCSLTC: 526 #endif /* COMPAT_43TTY */ 527 /* 528 * If the ioctl() causes the TTY to be modified, let it 529 * wait in the background. 530 */ 531 error = tty_wait_background(tp, curthread, SIGTTOU); 532 if (error) 533 goto done; 534 } 535 536 if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 537 struct termios *old = &tp->t_termios; 538 struct termios *new = (struct termios *)data; 539 struct termios *lock = TTY_CALLOUT(tp, dev) ? 540 &tp->t_termios_lock_out : &tp->t_termios_lock_in; 541 int cc; 542 543 /* 544 * Lock state devices. Just overwrite the values of the 545 * commands that are currently in use. 546 */ 547 new->c_iflag = (old->c_iflag & lock->c_iflag) | 548 (new->c_iflag & ~lock->c_iflag); 549 new->c_oflag = (old->c_oflag & lock->c_oflag) | 550 (new->c_oflag & ~lock->c_oflag); 551 new->c_cflag = (old->c_cflag & lock->c_cflag) | 552 (new->c_cflag & ~lock->c_cflag); 553 new->c_lflag = (old->c_lflag & lock->c_lflag) | 554 (new->c_lflag & ~lock->c_lflag); 555 for (cc = 0; cc < NCCS; ++cc) 556 if (lock->c_cc[cc]) 557 new->c_cc[cc] = old->c_cc[cc]; 558 if (lock->c_ispeed) 559 new->c_ispeed = old->c_ispeed; 560 if (lock->c_ospeed) 561 new->c_ospeed = old->c_ospeed; 562 } 563 564 error = tty_ioctl(tp, cmd, data, fflag, td); 565 done: tty_unlock(tp); 566 567 return (error); 568 } 569 570 static int 571 ttydev_poll(struct cdev *dev, int events, struct thread *td) 572 { 573 struct tty *tp = dev->si_drv1; 574 int error, revents = 0; 575 576 error = ttydev_enter(tp); 577 if (error) 578 return ((events & (POLLIN|POLLRDNORM)) | POLLHUP); 579 580 if (events & (POLLIN|POLLRDNORM)) { 581 /* See if we can read something. */ 582 if (ttydisc_read_poll(tp) > 0) 583 revents |= events & (POLLIN|POLLRDNORM); 584 } 585 586 if (tp->t_flags & TF_ZOMBIE) { 587 /* Hangup flag on zombie state. */ 588 revents |= POLLHUP; 589 } else if (events & (POLLOUT|POLLWRNORM)) { 590 /* See if we can write something. */ 591 if (ttydisc_write_poll(tp) > 0) 592 revents |= events & (POLLOUT|POLLWRNORM); 593 } 594 595 if (revents == 0) { 596 if (events & (POLLIN|POLLRDNORM)) 597 selrecord(td, &tp->t_inpoll); 598 if (events & (POLLOUT|POLLWRNORM)) 599 selrecord(td, &tp->t_outpoll); 600 } 601 602 tty_unlock(tp); 603 604 return (revents); 605 } 606 607 static int 608 ttydev_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, 609 int nprot, vm_memattr_t *memattr) 610 { 611 struct tty *tp = dev->si_drv1; 612 int error; 613 614 /* Handle mmap() through the driver. */ 615 616 error = ttydev_enter(tp); 617 if (error) 618 return (-1); 619 error = ttydevsw_mmap(tp, offset, paddr, nprot, memattr); 620 tty_unlock(tp); 621 622 return (error); 623 } 624 625 /* 626 * kqueue support. 627 */ 628 629 static void 630 tty_kqops_read_detach(struct knote *kn) 631 { 632 struct tty *tp = kn->kn_hook; 633 634 knlist_remove(&tp->t_inpoll.si_note, kn, 0); 635 } 636 637 static int 638 tty_kqops_read_event(struct knote *kn, long hint) 639 { 640 struct tty *tp = kn->kn_hook; 641 642 tty_lock_assert(tp, MA_OWNED); 643 644 if (tty_gone(tp) || tp->t_flags & TF_ZOMBIE) { 645 kn->kn_flags |= EV_EOF; 646 return (1); 647 } else { 648 kn->kn_data = ttydisc_read_poll(tp); 649 return (kn->kn_data > 0); 650 } 651 } 652 653 static void 654 tty_kqops_write_detach(struct knote *kn) 655 { 656 struct tty *tp = kn->kn_hook; 657 658 knlist_remove(&tp->t_outpoll.si_note, kn, 0); 659 } 660 661 static int 662 tty_kqops_write_event(struct knote *kn, long hint) 663 { 664 struct tty *tp = kn->kn_hook; 665 666 tty_lock_assert(tp, MA_OWNED); 667 668 if (tty_gone(tp)) { 669 kn->kn_flags |= EV_EOF; 670 return (1); 671 } else { 672 kn->kn_data = ttydisc_write_poll(tp); 673 return (kn->kn_data > 0); 674 } 675 } 676 677 static struct filterops tty_kqops_read = { 678 .f_isfd = 1, 679 .f_detach = tty_kqops_read_detach, 680 .f_event = tty_kqops_read_event, 681 }; 682 static struct filterops tty_kqops_write = { 683 .f_isfd = 1, 684 .f_detach = tty_kqops_write_detach, 685 .f_event = tty_kqops_write_event, 686 }; 687 688 static int 689 ttydev_kqfilter(struct cdev *dev, struct knote *kn) 690 { 691 struct tty *tp = dev->si_drv1; 692 int error; 693 694 error = ttydev_enter(tp); 695 if (error) 696 return (error); 697 698 switch (kn->kn_filter) { 699 case EVFILT_READ: 700 kn->kn_hook = tp; 701 kn->kn_fop = &tty_kqops_read; 702 knlist_add(&tp->t_inpoll.si_note, kn, 1); 703 break; 704 case EVFILT_WRITE: 705 kn->kn_hook = tp; 706 kn->kn_fop = &tty_kqops_write; 707 knlist_add(&tp->t_outpoll.si_note, kn, 1); 708 break; 709 default: 710 error = EINVAL; 711 break; 712 } 713 714 tty_unlock(tp); 715 return (error); 716 } 717 718 static struct cdevsw ttydev_cdevsw = { 719 .d_version = D_VERSION, 720 .d_open = ttydev_open, 721 .d_close = ttydev_close, 722 .d_read = ttydev_read, 723 .d_write = ttydev_write, 724 .d_ioctl = ttydev_ioctl, 725 .d_kqfilter = ttydev_kqfilter, 726 .d_poll = ttydev_poll, 727 .d_mmap = ttydev_mmap, 728 .d_name = "ttydev", 729 .d_flags = D_TTY, 730 }; 731 732 /* 733 * Init/lock-state devices 734 */ 735 736 static int 737 ttyil_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 738 { 739 struct tty *tp = dev->si_drv1; 740 int error = 0; 741 742 tty_lock(tp); 743 if (tty_gone(tp)) 744 error = ENODEV; 745 tty_unlock(tp); 746 747 return (error); 748 } 749 750 static int 751 ttyil_close(struct cdev *dev, int flag, int mode, struct thread *td) 752 { 753 return (0); 754 } 755 756 static int 757 ttyil_rdwr(struct cdev *dev, struct uio *uio, int ioflag) 758 { 759 return (ENODEV); 760 } 761 762 static int 763 ttyil_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, 764 struct thread *td) 765 { 766 struct tty *tp = dev->si_drv1; 767 int error = 0; 768 769 tty_lock(tp); 770 if (tty_gone(tp)) { 771 error = ENODEV; 772 goto done; 773 } 774 775 switch (cmd) { 776 case TIOCGETA: 777 /* Obtain terminal flags through tcgetattr(). */ 778 *(struct termios*)data = *(struct termios*)dev->si_drv2; 779 break; 780 case TIOCSETA: 781 /* Set terminal flags through tcsetattr(). */ 782 error = priv_check(td, PRIV_TTY_SETA); 783 if (error) 784 break; 785 *(struct termios*)dev->si_drv2 = *(struct termios*)data; 786 break; 787 case TIOCGETD: 788 *(int *)data = TTYDISC; 789 break; 790 case TIOCGWINSZ: 791 bzero(data, sizeof(struct winsize)); 792 break; 793 default: 794 error = ENOTTY; 795 } 796 797 done: tty_unlock(tp); 798 return (error); 799 } 800 801 static struct cdevsw ttyil_cdevsw = { 802 .d_version = D_VERSION, 803 .d_open = ttyil_open, 804 .d_close = ttyil_close, 805 .d_read = ttyil_rdwr, 806 .d_write = ttyil_rdwr, 807 .d_ioctl = ttyil_ioctl, 808 .d_name = "ttyil", 809 .d_flags = D_TTY, 810 }; 811 812 static void 813 tty_init_termios(struct tty *tp) 814 { 815 struct termios *t = &tp->t_termios_init_in; 816 817 t->c_cflag = TTYDEF_CFLAG; 818 t->c_iflag = TTYDEF_IFLAG; 819 t->c_lflag = TTYDEF_LFLAG; 820 t->c_oflag = TTYDEF_OFLAG; 821 t->c_ispeed = TTYDEF_SPEED; 822 t->c_ospeed = TTYDEF_SPEED; 823 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars); 824 825 tp->t_termios_init_out = *t; 826 } 827 828 void 829 tty_init_console(struct tty *tp, speed_t s) 830 { 831 struct termios *ti = &tp->t_termios_init_in; 832 struct termios *to = &tp->t_termios_init_out; 833 834 if (s != 0) { 835 ti->c_ispeed = ti->c_ospeed = s; 836 to->c_ispeed = to->c_ospeed = s; 837 } 838 839 ti->c_cflag |= CLOCAL; 840 to->c_cflag |= CLOCAL; 841 } 842 843 /* 844 * Standard device routine implementations, mostly meant for 845 * pseudo-terminal device drivers. When a driver creates a new terminal 846 * device class, missing routines are patched. 847 */ 848 849 static int 850 ttydevsw_defopen(struct tty *tp) 851 { 852 853 return (0); 854 } 855 856 static void 857 ttydevsw_defclose(struct tty *tp) 858 { 859 } 860 861 static void 862 ttydevsw_defoutwakeup(struct tty *tp) 863 { 864 865 panic("Terminal device has output, while not implemented"); 866 } 867 868 static void 869 ttydevsw_definwakeup(struct tty *tp) 870 { 871 } 872 873 static int 874 ttydevsw_defioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td) 875 { 876 877 return (ENOIOCTL); 878 } 879 880 static int 881 ttydevsw_defparam(struct tty *tp, struct termios *t) 882 { 883 884 /* 885 * Allow the baud rate to be adjusted for pseudo-devices, but at 886 * least restrict it to 115200 to prevent excessive buffer 887 * usage. Also disallow 0, to prevent foot shooting. 888 */ 889 if (t->c_ispeed < B50) 890 t->c_ispeed = B50; 891 else if (t->c_ispeed > B115200) 892 t->c_ispeed = B115200; 893 if (t->c_ospeed < B50) 894 t->c_ospeed = B50; 895 else if (t->c_ospeed > B115200) 896 t->c_ospeed = B115200; 897 t->c_cflag |= CREAD; 898 899 return (0); 900 } 901 902 static int 903 ttydevsw_defmodem(struct tty *tp, int sigon, int sigoff) 904 { 905 906 /* Simulate a carrier to make the TTY layer happy. */ 907 return (SER_DCD); 908 } 909 910 static int 911 ttydevsw_defmmap(struct tty *tp, vm_ooffset_t offset, vm_paddr_t *paddr, 912 int nprot, vm_memattr_t *memattr) 913 { 914 915 return (-1); 916 } 917 918 static void 919 ttydevsw_defpktnotify(struct tty *tp, char event) 920 { 921 } 922 923 static void 924 ttydevsw_deffree(void *softc) 925 { 926 927 panic("Terminal device freed without a free-handler"); 928 } 929 930 /* 931 * TTY allocation and deallocation. TTY devices can be deallocated when 932 * the driver doesn't use it anymore, when the TTY isn't a session's 933 * controlling TTY and when the device node isn't opened through devfs. 934 */ 935 936 struct tty * 937 tty_alloc(struct ttydevsw *tsw, void *sc) 938 { 939 940 return (tty_alloc_mutex(tsw, sc, NULL)); 941 } 942 943 struct tty * 944 tty_alloc_mutex(struct ttydevsw *tsw, void *sc, struct mtx *mutex) 945 { 946 struct tty *tp; 947 948 /* Make sure the driver defines all routines. */ 949 #define PATCH_FUNC(x) do { \ 950 if (tsw->tsw_ ## x == NULL) \ 951 tsw->tsw_ ## x = ttydevsw_def ## x; \ 952 } while (0) 953 PATCH_FUNC(open); 954 PATCH_FUNC(close); 955 PATCH_FUNC(outwakeup); 956 PATCH_FUNC(inwakeup); 957 PATCH_FUNC(ioctl); 958 PATCH_FUNC(param); 959 PATCH_FUNC(modem); 960 PATCH_FUNC(mmap); 961 PATCH_FUNC(pktnotify); 962 PATCH_FUNC(free); 963 #undef PATCH_FUNC 964 965 tp = malloc(sizeof(struct tty), M_TTY, M_WAITOK|M_ZERO); 966 tp->t_devsw = tsw; 967 tp->t_devswsoftc = sc; 968 tp->t_flags = tsw->tsw_flags; 969 970 tty_init_termios(tp); 971 972 cv_init(&tp->t_inwait, "ttyin"); 973 cv_init(&tp->t_outwait, "ttyout"); 974 cv_init(&tp->t_outserwait, "ttyosr"); 975 cv_init(&tp->t_bgwait, "ttybg"); 976 cv_init(&tp->t_dcdwait, "ttydcd"); 977 978 /* Allow drivers to use a custom mutex to lock the TTY. */ 979 if (mutex != NULL) { 980 tp->t_mtx = mutex; 981 } else { 982 tp->t_mtx = &tp->t_mtxobj; 983 mtx_init(&tp->t_mtxobj, "ttymtx", NULL, MTX_DEF); 984 } 985 986 knlist_init_mtx(&tp->t_inpoll.si_note, tp->t_mtx); 987 knlist_init_mtx(&tp->t_outpoll.si_note, tp->t_mtx); 988 989 sx_xlock(&tty_list_sx); 990 TAILQ_INSERT_TAIL(&tty_list, tp, t_list); 991 tty_list_count++; 992 sx_xunlock(&tty_list_sx); 993 994 return (tp); 995 } 996 997 static void 998 tty_dealloc(void *arg) 999 { 1000 struct tty *tp = arg; 1001 1002 sx_xlock(&tty_list_sx); 1003 TAILQ_REMOVE(&tty_list, tp, t_list); 1004 tty_list_count--; 1005 sx_xunlock(&tty_list_sx); 1006 1007 /* Make sure we haven't leaked buffers. */ 1008 MPASS(ttyinq_getsize(&tp->t_inq) == 0); 1009 MPASS(ttyoutq_getsize(&tp->t_outq) == 0); 1010 1011 knlist_destroy(&tp->t_inpoll.si_note); 1012 knlist_destroy(&tp->t_outpoll.si_note); 1013 1014 cv_destroy(&tp->t_inwait); 1015 cv_destroy(&tp->t_outwait); 1016 cv_destroy(&tp->t_bgwait); 1017 cv_destroy(&tp->t_dcdwait); 1018 cv_destroy(&tp->t_outserwait); 1019 1020 if (tp->t_mtx == &tp->t_mtxobj) 1021 mtx_destroy(&tp->t_mtxobj); 1022 ttydevsw_free(tp); 1023 free(tp, M_TTY); 1024 } 1025 1026 static void 1027 tty_rel_free(struct tty *tp) 1028 { 1029 struct cdev *dev; 1030 1031 tty_lock_assert(tp, MA_OWNED); 1032 1033 #define TF_ACTIVITY (TF_GONE|TF_OPENED|TF_HOOK|TF_OPENCLOSE) 1034 if (tp->t_sessioncnt != 0 || (tp->t_flags & TF_ACTIVITY) != TF_GONE) { 1035 /* TTY is still in use. */ 1036 tty_unlock(tp); 1037 return; 1038 } 1039 1040 /* TTY can be deallocated. */ 1041 dev = tp->t_dev; 1042 tp->t_dev = NULL; 1043 tty_unlock(tp); 1044 1045 if (dev != NULL) 1046 destroy_dev_sched_cb(dev, tty_dealloc, tp); 1047 } 1048 1049 void 1050 tty_rel_pgrp(struct tty *tp, struct pgrp *pg) 1051 { 1052 MPASS(tp->t_sessioncnt > 0); 1053 tty_lock_assert(tp, MA_OWNED); 1054 1055 if (tp->t_pgrp == pg) 1056 tp->t_pgrp = NULL; 1057 1058 tty_unlock(tp); 1059 } 1060 1061 void 1062 tty_rel_sess(struct tty *tp, struct session *sess) 1063 { 1064 MPASS(tp->t_sessioncnt > 0); 1065 1066 /* Current session has left. */ 1067 if (tp->t_session == sess) { 1068 tp->t_session = NULL; 1069 MPASS(tp->t_pgrp == NULL); 1070 } 1071 tp->t_sessioncnt--; 1072 tty_rel_free(tp); 1073 } 1074 1075 void 1076 tty_rel_gone(struct tty *tp) 1077 { 1078 MPASS(!tty_gone(tp)); 1079 1080 /* Simulate carrier removal. */ 1081 ttydisc_modem(tp, 0); 1082 1083 /* Wake up all blocked threads. */ 1084 tty_wakeup(tp, FREAD|FWRITE); 1085 cv_broadcast(&tp->t_bgwait); 1086 cv_broadcast(&tp->t_dcdwait); 1087 1088 tp->t_flags |= TF_GONE; 1089 tty_rel_free(tp); 1090 } 1091 1092 /* 1093 * Exposing information about current TTY's through sysctl 1094 */ 1095 1096 static void 1097 tty_to_xtty(struct tty *tp, struct xtty *xt) 1098 { 1099 tty_lock_assert(tp, MA_OWNED); 1100 1101 xt->xt_size = sizeof(struct xtty); 1102 xt->xt_insize = ttyinq_getsize(&tp->t_inq); 1103 xt->xt_incc = ttyinq_bytescanonicalized(&tp->t_inq); 1104 xt->xt_inlc = ttyinq_bytesline(&tp->t_inq); 1105 xt->xt_inlow = tp->t_inlow; 1106 xt->xt_outsize = ttyoutq_getsize(&tp->t_outq); 1107 xt->xt_outcc = ttyoutq_bytesused(&tp->t_outq); 1108 xt->xt_outlow = tp->t_outlow; 1109 xt->xt_column = tp->t_column; 1110 xt->xt_pgid = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 1111 xt->xt_sid = tp->t_session ? tp->t_session->s_sid : 0; 1112 xt->xt_flags = tp->t_flags; 1113 xt->xt_dev = tp->t_dev ? dev2udev(tp->t_dev) : NODEV; 1114 } 1115 1116 static int 1117 sysctl_kern_ttys(SYSCTL_HANDLER_ARGS) 1118 { 1119 unsigned long lsize; 1120 struct xtty *xtlist, *xt; 1121 struct tty *tp; 1122 int error; 1123 1124 sx_slock(&tty_list_sx); 1125 lsize = tty_list_count * sizeof(struct xtty); 1126 if (lsize == 0) { 1127 sx_sunlock(&tty_list_sx); 1128 return (0); 1129 } 1130 1131 xtlist = xt = malloc(lsize, M_TTY, M_WAITOK); 1132 1133 TAILQ_FOREACH(tp, &tty_list, t_list) { 1134 tty_lock(tp); 1135 tty_to_xtty(tp, xt); 1136 tty_unlock(tp); 1137 xt++; 1138 } 1139 sx_sunlock(&tty_list_sx); 1140 1141 error = SYSCTL_OUT(req, xtlist, lsize); 1142 free(xtlist, M_TTY); 1143 return (error); 1144 } 1145 1146 SYSCTL_PROC(_kern, OID_AUTO, ttys, CTLTYPE_OPAQUE|CTLFLAG_RD|CTLFLAG_MPSAFE, 1147 0, 0, sysctl_kern_ttys, "S,xtty", "List of TTYs"); 1148 1149 /* 1150 * Device node creation. Device has been set up, now we can expose it to 1151 * the user. 1152 */ 1153 1154 void 1155 tty_makedev(struct tty *tp, struct ucred *cred, const char *fmt, ...) 1156 { 1157 va_list ap; 1158 struct cdev *dev; 1159 const char *prefix = "tty"; 1160 char name[SPECNAMELEN - 3]; /* for "tty" and "cua". */ 1161 uid_t uid; 1162 gid_t gid; 1163 mode_t mode; 1164 1165 /* Remove "tty" prefix from devices like PTY's. */ 1166 if (tp->t_flags & TF_NOPREFIX) 1167 prefix = ""; 1168 1169 va_start(ap, fmt); 1170 vsnrprintf(name, sizeof name, 32, fmt, ap); 1171 va_end(ap); 1172 1173 if (cred == NULL) { 1174 /* System device. */ 1175 uid = UID_ROOT; 1176 gid = GID_WHEEL; 1177 mode = S_IRUSR|S_IWUSR; 1178 } else { 1179 /* User device. */ 1180 uid = cred->cr_ruid; 1181 gid = GID_TTY; 1182 mode = S_IRUSR|S_IWUSR|S_IWGRP; 1183 } 1184 1185 /* Master call-in device. */ 1186 dev = make_dev_cred(&ttydev_cdevsw, 0, cred, 1187 uid, gid, mode, "%s%s", prefix, name); 1188 dev->si_drv1 = tp; 1189 tp->t_dev = dev; 1190 1191 /* Slave call-in devices. */ 1192 if (tp->t_flags & TF_INITLOCK) { 1193 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1194 uid, gid, mode, "%s%s.init", prefix, name); 1195 dev_depends(tp->t_dev, dev); 1196 dev->si_drv1 = tp; 1197 dev->si_drv2 = &tp->t_termios_init_in; 1198 1199 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1200 uid, gid, mode, "%s%s.lock", prefix, name); 1201 dev_depends(tp->t_dev, dev); 1202 dev->si_drv1 = tp; 1203 dev->si_drv2 = &tp->t_termios_lock_in; 1204 } 1205 1206 /* Call-out devices. */ 1207 if (tp->t_flags & TF_CALLOUT) { 1208 dev = make_dev_cred(&ttydev_cdevsw, 0, cred, 1209 UID_UUCP, GID_DIALER, 0660, "cua%s", name); 1210 dev_depends(tp->t_dev, dev); 1211 dev->si_drv1 = tp; 1212 1213 /* Slave call-out devices. */ 1214 if (tp->t_flags & TF_INITLOCK) { 1215 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1216 UID_UUCP, GID_DIALER, 0660, "cua%s.init", name); 1217 dev_depends(tp->t_dev, dev); 1218 dev->si_drv1 = tp; 1219 dev->si_drv2 = &tp->t_termios_init_out; 1220 1221 dev = make_dev_cred(&ttyil_cdevsw, 0, cred, 1222 UID_UUCP, GID_DIALER, 0660, "cua%s.lock", name); 1223 dev_depends(tp->t_dev, dev); 1224 dev->si_drv1 = tp; 1225 dev->si_drv2 = &tp->t_termios_lock_out; 1226 } 1227 } 1228 } 1229 1230 /* 1231 * Signalling processes. 1232 */ 1233 1234 void 1235 tty_signal_sessleader(struct tty *tp, int sig) 1236 { 1237 struct proc *p; 1238 1239 tty_lock_assert(tp, MA_OWNED); 1240 MPASS(sig >= 1 && sig < NSIG); 1241 1242 /* Make signals start output again. */ 1243 tp->t_flags &= ~TF_STOPPED; 1244 1245 if (tp->t_session != NULL && tp->t_session->s_leader != NULL) { 1246 p = tp->t_session->s_leader; 1247 PROC_LOCK(p); 1248 psignal(p, sig); 1249 PROC_UNLOCK(p); 1250 } 1251 } 1252 1253 void 1254 tty_signal_pgrp(struct tty *tp, int sig) 1255 { 1256 ksiginfo_t ksi; 1257 1258 tty_lock_assert(tp, MA_OWNED); 1259 MPASS(sig >= 1 && sig < NSIG); 1260 1261 /* Make signals start output again. */ 1262 tp->t_flags &= ~TF_STOPPED; 1263 1264 if (sig == SIGINFO && !(tp->t_termios.c_lflag & NOKERNINFO)) 1265 tty_info(tp); 1266 if (tp->t_pgrp != NULL) { 1267 ksiginfo_init(&ksi); 1268 ksi.ksi_signo = sig; 1269 ksi.ksi_code = SI_KERNEL; 1270 PGRP_LOCK(tp->t_pgrp); 1271 pgsignal(tp->t_pgrp, sig, 1, &ksi); 1272 PGRP_UNLOCK(tp->t_pgrp); 1273 } 1274 } 1275 1276 void 1277 tty_wakeup(struct tty *tp, int flags) 1278 { 1279 if (tp->t_flags & TF_ASYNC && tp->t_sigio != NULL) 1280 pgsigio(&tp->t_sigio, SIGIO, (tp->t_session != NULL)); 1281 1282 if (flags & FWRITE) { 1283 cv_broadcast(&tp->t_outwait); 1284 selwakeup(&tp->t_outpoll); 1285 KNOTE_LOCKED(&tp->t_outpoll.si_note, 0); 1286 } 1287 if (flags & FREAD) { 1288 cv_broadcast(&tp->t_inwait); 1289 selwakeup(&tp->t_inpoll); 1290 KNOTE_LOCKED(&tp->t_inpoll.si_note, 0); 1291 } 1292 } 1293 1294 int 1295 tty_wait(struct tty *tp, struct cv *cv) 1296 { 1297 int error; 1298 int revokecnt = tp->t_revokecnt; 1299 1300 tty_lock_assert(tp, MA_OWNED|MA_NOTRECURSED); 1301 MPASS(!tty_gone(tp)); 1302 1303 error = cv_wait_sig(cv, tp->t_mtx); 1304 1305 /* Restart the system call when we may have been revoked. */ 1306 if (tp->t_revokecnt != revokecnt) 1307 return (ERESTART); 1308 1309 /* Bail out when the device slipped away. */ 1310 if (tty_gone(tp)) 1311 return (ENXIO); 1312 1313 return (error); 1314 } 1315 1316 int 1317 tty_timedwait(struct tty *tp, struct cv *cv, int hz) 1318 { 1319 int error; 1320 int revokecnt = tp->t_revokecnt; 1321 1322 tty_lock_assert(tp, MA_OWNED|MA_NOTRECURSED); 1323 MPASS(!tty_gone(tp)); 1324 1325 error = cv_timedwait_sig(cv, tp->t_mtx, hz); 1326 1327 /* Restart the system call when we may have been revoked. */ 1328 if (tp->t_revokecnt != revokecnt) 1329 return (ERESTART); 1330 1331 /* Bail out when the device slipped away. */ 1332 if (tty_gone(tp)) 1333 return (ENXIO); 1334 1335 return (error); 1336 } 1337 1338 void 1339 tty_flush(struct tty *tp, int flags) 1340 { 1341 if (flags & FWRITE) { 1342 tp->t_flags &= ~TF_HIWAT_OUT; 1343 ttyoutq_flush(&tp->t_outq); 1344 tty_wakeup(tp, FWRITE); 1345 ttydevsw_pktnotify(tp, TIOCPKT_FLUSHWRITE); 1346 } 1347 if (flags & FREAD) { 1348 tty_hiwat_in_unblock(tp); 1349 ttyinq_flush(&tp->t_inq); 1350 ttydevsw_inwakeup(tp); 1351 ttydevsw_pktnotify(tp, TIOCPKT_FLUSHREAD); 1352 } 1353 } 1354 1355 static int 1356 tty_generic_ioctl(struct tty *tp, u_long cmd, void *data, int fflag, 1357 struct thread *td) 1358 { 1359 int error; 1360 1361 switch (cmd) { 1362 /* 1363 * Modem commands. 1364 * The SER_* and TIOCM_* flags are the same, but one bit 1365 * shifted. I don't know why. 1366 */ 1367 case TIOCSDTR: 1368 ttydevsw_modem(tp, SER_DTR, 0); 1369 return (0); 1370 case TIOCCDTR: 1371 ttydevsw_modem(tp, 0, SER_DTR); 1372 return (0); 1373 case TIOCMSET: { 1374 int bits = *(int *)data; 1375 ttydevsw_modem(tp, 1376 (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1, 1377 ((~bits) & (TIOCM_DTR | TIOCM_RTS)) >> 1); 1378 return (0); 1379 } 1380 case TIOCMBIS: { 1381 int bits = *(int *)data; 1382 ttydevsw_modem(tp, (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1, 0); 1383 return (0); 1384 } 1385 case TIOCMBIC: { 1386 int bits = *(int *)data; 1387 ttydevsw_modem(tp, 0, (bits & (TIOCM_DTR | TIOCM_RTS)) >> 1); 1388 return (0); 1389 } 1390 case TIOCMGET: 1391 *(int *)data = TIOCM_LE + (ttydevsw_modem(tp, 0, 0) << 1); 1392 return (0); 1393 1394 case FIOASYNC: 1395 if (*(int *)data) 1396 tp->t_flags |= TF_ASYNC; 1397 else 1398 tp->t_flags &= ~TF_ASYNC; 1399 return (0); 1400 case FIONBIO: 1401 /* This device supports non-blocking operation. */ 1402 return (0); 1403 case FIONREAD: 1404 *(int *)data = ttyinq_bytescanonicalized(&tp->t_inq); 1405 return (0); 1406 case FIONWRITE: 1407 case TIOCOUTQ: 1408 *(int *)data = ttyoutq_bytesused(&tp->t_outq); 1409 return (0); 1410 case FIOSETOWN: 1411 if (tp->t_session != NULL && !tty_is_ctty(tp, td->td_proc)) 1412 /* Not allowed to set ownership. */ 1413 return (ENOTTY); 1414 1415 /* Temporarily unlock the TTY to set ownership. */ 1416 tty_unlock(tp); 1417 error = fsetown(*(int *)data, &tp->t_sigio); 1418 tty_lock(tp); 1419 return (error); 1420 case FIOGETOWN: 1421 if (tp->t_session != NULL && !tty_is_ctty(tp, td->td_proc)) 1422 /* Not allowed to set ownership. */ 1423 return (ENOTTY); 1424 1425 /* Get ownership. */ 1426 *(int *)data = fgetown(&tp->t_sigio); 1427 return (0); 1428 case TIOCGETA: 1429 /* Obtain terminal flags through tcgetattr(). */ 1430 *(struct termios*)data = tp->t_termios; 1431 return (0); 1432 case TIOCSETA: 1433 case TIOCSETAW: 1434 case TIOCSETAF: { 1435 struct termios *t = data; 1436 1437 /* 1438 * Who makes up these funny rules? According to POSIX, 1439 * input baud rate is set equal to the output baud rate 1440 * when zero. 1441 */ 1442 if (t->c_ispeed == 0) 1443 t->c_ispeed = t->c_ospeed; 1444 1445 /* Discard any unsupported bits. */ 1446 t->c_iflag &= TTYSUP_IFLAG; 1447 t->c_oflag &= TTYSUP_OFLAG; 1448 t->c_lflag &= TTYSUP_LFLAG; 1449 t->c_cflag &= TTYSUP_CFLAG; 1450 1451 /* Set terminal flags through tcsetattr(). */ 1452 if (cmd == TIOCSETAW || cmd == TIOCSETAF) { 1453 error = tty_drain(tp); 1454 if (error) 1455 return (error); 1456 if (cmd == TIOCSETAF) 1457 tty_flush(tp, FREAD); 1458 } 1459 1460 /* 1461 * Only call param() when the flags really change. 1462 */ 1463 if ((t->c_cflag & CIGNORE) == 0 && 1464 (tp->t_termios.c_cflag != t->c_cflag || 1465 tp->t_termios.c_ispeed != t->c_ispeed || 1466 tp->t_termios.c_ospeed != t->c_ospeed)) { 1467 error = ttydevsw_param(tp, t); 1468 if (error) 1469 return (error); 1470 1471 /* XXX: CLOCAL? */ 1472 1473 tp->t_termios.c_cflag = t->c_cflag & ~CIGNORE; 1474 tp->t_termios.c_ispeed = t->c_ispeed; 1475 tp->t_termios.c_ospeed = t->c_ospeed; 1476 1477 /* Baud rate has changed - update watermarks. */ 1478 tty_watermarks(tp); 1479 } 1480 1481 /* Copy new non-device driver parameters. */ 1482 tp->t_termios.c_iflag = t->c_iflag; 1483 tp->t_termios.c_oflag = t->c_oflag; 1484 tp->t_termios.c_lflag = t->c_lflag; 1485 memcpy(&tp->t_termios.c_cc, t->c_cc, sizeof t->c_cc); 1486 1487 ttydisc_optimize(tp); 1488 1489 if ((t->c_lflag & ICANON) == 0) { 1490 /* 1491 * When in non-canonical mode, wake up all 1492 * readers. Canonicalize any partial input. VMIN 1493 * and VTIME could also be adjusted. 1494 */ 1495 ttyinq_canonicalize(&tp->t_inq); 1496 tty_wakeup(tp, FREAD); 1497 } 1498 1499 /* 1500 * For packet mode: notify the PTY consumer that VSTOP 1501 * and VSTART may have been changed. 1502 */ 1503 if (tp->t_termios.c_iflag & IXON && 1504 tp->t_termios.c_cc[VSTOP] == CTRL('S') && 1505 tp->t_termios.c_cc[VSTART] == CTRL('Q')) 1506 ttydevsw_pktnotify(tp, TIOCPKT_DOSTOP); 1507 else 1508 ttydevsw_pktnotify(tp, TIOCPKT_NOSTOP); 1509 return (0); 1510 } 1511 case TIOCGETD: 1512 /* For compatibility - we only support TTYDISC. */ 1513 *(int *)data = TTYDISC; 1514 return (0); 1515 case TIOCGPGRP: 1516 if (!tty_is_ctty(tp, td->td_proc)) 1517 return (ENOTTY); 1518 1519 if (tp->t_pgrp != NULL) 1520 *(int *)data = tp->t_pgrp->pg_id; 1521 else 1522 *(int *)data = NO_PID; 1523 return (0); 1524 case TIOCGSID: 1525 if (!tty_is_ctty(tp, td->td_proc)) 1526 return (ENOTTY); 1527 1528 MPASS(tp->t_session); 1529 *(int *)data = tp->t_session->s_sid; 1530 return (0); 1531 case TIOCSCTTY: { 1532 struct proc *p = td->td_proc; 1533 1534 /* XXX: This looks awful. */ 1535 tty_unlock(tp); 1536 sx_xlock(&proctree_lock); 1537 tty_lock(tp); 1538 1539 if (!SESS_LEADER(p)) { 1540 /* Only the session leader may do this. */ 1541 sx_xunlock(&proctree_lock); 1542 return (EPERM); 1543 } 1544 1545 if (tp->t_session != NULL && tp->t_session == p->p_session) { 1546 /* This is already our controlling TTY. */ 1547 sx_xunlock(&proctree_lock); 1548 return (0); 1549 } 1550 1551 if (p->p_session->s_ttyp != NULL || 1552 (tp->t_session != NULL && tp->t_session->s_ttyvp != NULL && 1553 tp->t_session->s_ttyvp->v_type != VBAD)) { 1554 /* 1555 * There is already a relation between a TTY and 1556 * a session, or the caller is not the session 1557 * leader. 1558 * 1559 * Allow the TTY to be stolen when the vnode is 1560 * invalid, but the reference to the TTY is 1561 * still active. This allows immediate reuse of 1562 * TTYs of which the session leader has been 1563 * killed or the TTY revoked. 1564 */ 1565 sx_xunlock(&proctree_lock); 1566 return (EPERM); 1567 } 1568 1569 /* Connect the session to the TTY. */ 1570 tp->t_session = p->p_session; 1571 tp->t_session->s_ttyp = tp; 1572 tp->t_sessioncnt++; 1573 sx_xunlock(&proctree_lock); 1574 1575 /* Assign foreground process group. */ 1576 tp->t_pgrp = p->p_pgrp; 1577 PROC_LOCK(p); 1578 p->p_flag |= P_CONTROLT; 1579 PROC_UNLOCK(p); 1580 1581 return (0); 1582 } 1583 case TIOCSPGRP: { 1584 struct pgrp *pg; 1585 1586 /* 1587 * XXX: Temporarily unlock the TTY to locate the process 1588 * group. This code would be lot nicer if we would ever 1589 * decompose proctree_lock. 1590 */ 1591 tty_unlock(tp); 1592 sx_slock(&proctree_lock); 1593 pg = pgfind(*(int *)data); 1594 if (pg != NULL) 1595 PGRP_UNLOCK(pg); 1596 if (pg == NULL || pg->pg_session != td->td_proc->p_session) { 1597 sx_sunlock(&proctree_lock); 1598 tty_lock(tp); 1599 return (EPERM); 1600 } 1601 tty_lock(tp); 1602 1603 /* 1604 * Determine if this TTY is the controlling TTY after 1605 * relocking the TTY. 1606 */ 1607 if (!tty_is_ctty(tp, td->td_proc)) { 1608 sx_sunlock(&proctree_lock); 1609 return (ENOTTY); 1610 } 1611 tp->t_pgrp = pg; 1612 sx_sunlock(&proctree_lock); 1613 1614 /* Wake up the background process groups. */ 1615 cv_broadcast(&tp->t_bgwait); 1616 return (0); 1617 } 1618 case TIOCFLUSH: { 1619 int flags = *(int *)data; 1620 1621 if (flags == 0) 1622 flags = (FREAD|FWRITE); 1623 else 1624 flags &= (FREAD|FWRITE); 1625 tty_flush(tp, flags); 1626 return (0); 1627 } 1628 case TIOCDRAIN: 1629 /* Drain TTY output. */ 1630 return tty_drain(tp); 1631 case TIOCCONS: 1632 /* Set terminal as console TTY. */ 1633 if (*(int *)data) { 1634 error = priv_check(td, PRIV_TTY_CONSOLE); 1635 if (error) 1636 return (error); 1637 1638 /* 1639 * XXX: constty should really need to be locked! 1640 * XXX: allow disconnected constty's to be stolen! 1641 */ 1642 1643 if (constty == tp) 1644 return (0); 1645 if (constty != NULL) 1646 return (EBUSY); 1647 1648 tty_unlock(tp); 1649 constty_set(tp); 1650 tty_lock(tp); 1651 } else if (constty == tp) { 1652 constty_clear(); 1653 } 1654 return (0); 1655 case TIOCGWINSZ: 1656 /* Obtain window size. */ 1657 *(struct winsize*)data = tp->t_winsize; 1658 return (0); 1659 case TIOCSWINSZ: 1660 /* Set window size. */ 1661 if (bcmp(&tp->t_winsize, data, sizeof(struct winsize)) == 0) 1662 return (0); 1663 tp->t_winsize = *(struct winsize*)data; 1664 tty_signal_pgrp(tp, SIGWINCH); 1665 return (0); 1666 case TIOCEXCL: 1667 tp->t_flags |= TF_EXCLUDE; 1668 return (0); 1669 case TIOCNXCL: 1670 tp->t_flags &= ~TF_EXCLUDE; 1671 return (0); 1672 case TIOCSTOP: 1673 tp->t_flags |= TF_STOPPED; 1674 ttydevsw_pktnotify(tp, TIOCPKT_STOP); 1675 return (0); 1676 case TIOCSTART: 1677 tp->t_flags &= ~TF_STOPPED; 1678 ttydevsw_outwakeup(tp); 1679 ttydevsw_pktnotify(tp, TIOCPKT_START); 1680 return (0); 1681 case TIOCSTAT: 1682 tty_info(tp); 1683 return (0); 1684 case TIOCSTI: 1685 if ((fflag & FREAD) == 0 && priv_check(td, PRIV_TTY_STI)) 1686 return (EPERM); 1687 if (!tty_is_ctty(tp, td->td_proc) && 1688 priv_check(td, PRIV_TTY_STI)) 1689 return (EACCES); 1690 ttydisc_rint(tp, *(char *)data, 0); 1691 ttydisc_rint_done(tp); 1692 return (0); 1693 } 1694 1695 #ifdef COMPAT_43TTY 1696 return tty_ioctl_compat(tp, cmd, data, fflag, td); 1697 #else /* !COMPAT_43TTY */ 1698 return (ENOIOCTL); 1699 #endif /* COMPAT_43TTY */ 1700 } 1701 1702 int 1703 tty_ioctl(struct tty *tp, u_long cmd, void *data, int fflag, struct thread *td) 1704 { 1705 int error; 1706 1707 tty_lock_assert(tp, MA_OWNED); 1708 1709 if (tty_gone(tp)) 1710 return (ENXIO); 1711 1712 error = ttydevsw_ioctl(tp, cmd, data, td); 1713 if (error == ENOIOCTL) 1714 error = tty_generic_ioctl(tp, cmd, data, fflag, td); 1715 1716 return (error); 1717 } 1718 1719 dev_t 1720 tty_udev(struct tty *tp) 1721 { 1722 if (tp->t_dev) 1723 return dev2udev(tp->t_dev); 1724 else 1725 return NODEV; 1726 } 1727 1728 int 1729 tty_checkoutq(struct tty *tp) 1730 { 1731 1732 /* 256 bytes should be enough to print a log message. */ 1733 return (ttyoutq_bytesleft(&tp->t_outq) >= 256); 1734 } 1735 1736 void 1737 tty_hiwat_in_block(struct tty *tp) 1738 { 1739 1740 if ((tp->t_flags & TF_HIWAT_IN) == 0 && 1741 tp->t_termios.c_iflag & IXOFF && 1742 tp->t_termios.c_cc[VSTOP] != _POSIX_VDISABLE) { 1743 /* 1744 * Input flow control. Only enter the high watermark when we 1745 * can successfully store the VSTOP character. 1746 */ 1747 if (ttyoutq_write_nofrag(&tp->t_outq, 1748 &tp->t_termios.c_cc[VSTOP], 1) == 0) 1749 tp->t_flags |= TF_HIWAT_IN; 1750 } else { 1751 /* No input flow control. */ 1752 tp->t_flags |= TF_HIWAT_IN; 1753 } 1754 } 1755 1756 void 1757 tty_hiwat_in_unblock(struct tty *tp) 1758 { 1759 1760 if (tp->t_flags & TF_HIWAT_IN && 1761 tp->t_termios.c_iflag & IXOFF && 1762 tp->t_termios.c_cc[VSTART] != _POSIX_VDISABLE) { 1763 /* 1764 * Input flow control. Only leave the high watermark when we 1765 * can successfully store the VSTART character. 1766 */ 1767 if (ttyoutq_write_nofrag(&tp->t_outq, 1768 &tp->t_termios.c_cc[VSTART], 1) == 0) 1769 tp->t_flags &= ~TF_HIWAT_IN; 1770 } else { 1771 /* No input flow control. */ 1772 tp->t_flags &= ~TF_HIWAT_IN; 1773 } 1774 1775 if (!tty_gone(tp)) 1776 ttydevsw_inwakeup(tp); 1777 } 1778 1779 /* 1780 * TTY hooks interface. 1781 */ 1782 1783 static int 1784 ttyhook_defrint(struct tty *tp, char c, int flags) 1785 { 1786 1787 if (ttyhook_rint_bypass(tp, &c, 1) != 1) 1788 return (-1); 1789 1790 return (0); 1791 } 1792 1793 int 1794 ttyhook_register(struct tty **rtp, struct proc *p, int fd, 1795 struct ttyhook *th, void *softc) 1796 { 1797 struct tty *tp; 1798 struct file *fp; 1799 struct cdev *dev; 1800 struct cdevsw *cdp; 1801 struct filedesc *fdp; 1802 int error, ref; 1803 1804 /* Validate the file descriptor. */ 1805 if ((fdp = p->p_fd) == NULL) 1806 return (EBADF); 1807 1808 fp = fget_unlocked(fdp, fd); 1809 if (fp == NULL) 1810 return (EBADF); 1811 if (fp->f_ops == &badfileops) { 1812 error = EBADF; 1813 goto done1; 1814 } 1815 1816 /* 1817 * Make sure the vnode is bound to a character device. 1818 * Unlocked check for the vnode type is ok there, because we 1819 * only shall prevent calling devvn_refthread on the file that 1820 * never has been opened over a character device. 1821 */ 1822 if (fp->f_type != DTYPE_VNODE || fp->f_vnode->v_type != VCHR) { 1823 error = EINVAL; 1824 goto done1; 1825 } 1826 1827 /* Make sure it is a TTY. */ 1828 cdp = devvn_refthread(fp->f_vnode, &dev, &ref); 1829 if (cdp == NULL) { 1830 error = ENXIO; 1831 goto done1; 1832 } 1833 if (dev != fp->f_data) { 1834 error = ENXIO; 1835 goto done2; 1836 } 1837 if (cdp != &ttydev_cdevsw) { 1838 error = ENOTTY; 1839 goto done2; 1840 } 1841 tp = dev->si_drv1; 1842 1843 /* Try to attach the hook to the TTY. */ 1844 error = EBUSY; 1845 tty_lock(tp); 1846 MPASS((tp->t_hook == NULL) == ((tp->t_flags & TF_HOOK) == 0)); 1847 if (tp->t_flags & TF_HOOK) 1848 goto done3; 1849 1850 tp->t_flags |= TF_HOOK; 1851 tp->t_hook = th; 1852 tp->t_hooksoftc = softc; 1853 *rtp = tp; 1854 error = 0; 1855 1856 /* Maybe we can switch into bypass mode now. */ 1857 ttydisc_optimize(tp); 1858 1859 /* Silently convert rint() calls to rint_bypass() when possible. */ 1860 if (!ttyhook_hashook(tp, rint) && ttyhook_hashook(tp, rint_bypass)) 1861 th->th_rint = ttyhook_defrint; 1862 1863 done3: tty_unlock(tp); 1864 done2: dev_relthread(dev, ref); 1865 done1: fdrop(fp, curthread); 1866 return (error); 1867 } 1868 1869 void 1870 ttyhook_unregister(struct tty *tp) 1871 { 1872 1873 tty_lock_assert(tp, MA_OWNED); 1874 MPASS(tp->t_flags & TF_HOOK); 1875 1876 /* Disconnect the hook. */ 1877 tp->t_flags &= ~TF_HOOK; 1878 tp->t_hook = NULL; 1879 1880 /* Maybe we need to leave bypass mode. */ 1881 ttydisc_optimize(tp); 1882 1883 /* Maybe deallocate the TTY as well. */ 1884 tty_rel_free(tp); 1885 } 1886 1887 /* 1888 * /dev/console handling. 1889 */ 1890 1891 static int 1892 ttyconsdev_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 1893 { 1894 struct tty *tp; 1895 1896 /* System has no console device. */ 1897 if (dev_console_filename == NULL) 1898 return (ENXIO); 1899 1900 /* Look up corresponding TTY by device name. */ 1901 sx_slock(&tty_list_sx); 1902 TAILQ_FOREACH(tp, &tty_list, t_list) { 1903 if (strcmp(dev_console_filename, tty_devname(tp)) == 0) { 1904 dev_console->si_drv1 = tp; 1905 break; 1906 } 1907 } 1908 sx_sunlock(&tty_list_sx); 1909 1910 /* System console has no TTY associated. */ 1911 if (dev_console->si_drv1 == NULL) 1912 return (ENXIO); 1913 1914 return (ttydev_open(dev, oflags, devtype, td)); 1915 } 1916 1917 static int 1918 ttyconsdev_write(struct cdev *dev, struct uio *uio, int ioflag) 1919 { 1920 1921 log_console(uio); 1922 1923 return (ttydev_write(dev, uio, ioflag)); 1924 } 1925 1926 /* 1927 * /dev/console is a little different than normal TTY's. When opened, 1928 * it determines which TTY to use. When data gets written to it, it 1929 * will be logged in the kernel message buffer. 1930 */ 1931 static struct cdevsw ttyconsdev_cdevsw = { 1932 .d_version = D_VERSION, 1933 .d_open = ttyconsdev_open, 1934 .d_close = ttydev_close, 1935 .d_read = ttydev_read, 1936 .d_write = ttyconsdev_write, 1937 .d_ioctl = ttydev_ioctl, 1938 .d_kqfilter = ttydev_kqfilter, 1939 .d_poll = ttydev_poll, 1940 .d_mmap = ttydev_mmap, 1941 .d_name = "ttyconsdev", 1942 .d_flags = D_TTY, 1943 }; 1944 1945 static void 1946 ttyconsdev_init(void *unused) 1947 { 1948 1949 dev_console = make_dev_credf(MAKEDEV_ETERNAL, &ttyconsdev_cdevsw, 0, 1950 NULL, UID_ROOT, GID_WHEEL, 0600, "console"); 1951 } 1952 1953 SYSINIT(tty, SI_SUB_DRIVERS, SI_ORDER_FIRST, ttyconsdev_init, NULL); 1954 1955 void 1956 ttyconsdev_select(const char *name) 1957 { 1958 1959 dev_console_filename = name; 1960 } 1961 1962 /* 1963 * Debugging routines. 1964 */ 1965 1966 #include "opt_ddb.h" 1967 #ifdef DDB 1968 #include <ddb/ddb.h> 1969 #include <ddb/db_sym.h> 1970 1971 static struct { 1972 int flag; 1973 char val; 1974 } ttystates[] = { 1975 #if 0 1976 { TF_NOPREFIX, 'N' }, 1977 #endif 1978 { TF_INITLOCK, 'I' }, 1979 { TF_CALLOUT, 'C' }, 1980 1981 /* Keep these together -> 'Oi' and 'Oo'. */ 1982 { TF_OPENED, 'O' }, 1983 { TF_OPENED_IN, 'i' }, 1984 { TF_OPENED_OUT, 'o' }, 1985 { TF_OPENED_CONS, 'c' }, 1986 1987 { TF_GONE, 'G' }, 1988 { TF_OPENCLOSE, 'B' }, 1989 { TF_ASYNC, 'Y' }, 1990 { TF_LITERAL, 'L' }, 1991 1992 /* Keep these together -> 'Hi' and 'Ho'. */ 1993 { TF_HIWAT, 'H' }, 1994 { TF_HIWAT_IN, 'i' }, 1995 { TF_HIWAT_OUT, 'o' }, 1996 1997 { TF_STOPPED, 'S' }, 1998 { TF_EXCLUDE, 'X' }, 1999 { TF_BYPASS, 'l' }, 2000 { TF_ZOMBIE, 'Z' }, 2001 { TF_HOOK, 's' }, 2002 2003 /* Keep these together -> 'bi' and 'bo'. */ 2004 { TF_BUSY, 'b' }, 2005 { TF_BUSY_IN, 'i' }, 2006 { TF_BUSY_OUT, 'o' }, 2007 2008 { 0, '\0'}, 2009 }; 2010 2011 #define TTY_FLAG_BITS \ 2012 "\20\1NOPREFIX\2INITLOCK\3CALLOUT\4OPENED_IN\5OPENED_OUT\6GONE" \ 2013 "\7OPENCLOSE\10ASYNC\11LITERAL\12HIWAT_IN\13HIWAT_OUT\14STOPPED" \ 2014 "\15EXCLUDE\16BYPASS\17ZOMBIE\20HOOK" 2015 2016 #define DB_PRINTSYM(name, addr) \ 2017 db_printf("%s " #name ": ", sep); \ 2018 db_printsym((db_addr_t) addr, DB_STGY_ANY); \ 2019 db_printf("\n"); 2020 2021 static void 2022 _db_show_devsw(const char *sep, const struct ttydevsw *tsw) 2023 { 2024 db_printf("%sdevsw: ", sep); 2025 db_printsym((db_addr_t)tsw, DB_STGY_ANY); 2026 db_printf(" (%p)\n", tsw); 2027 DB_PRINTSYM(open, tsw->tsw_open); 2028 DB_PRINTSYM(close, tsw->tsw_close); 2029 DB_PRINTSYM(outwakeup, tsw->tsw_outwakeup); 2030 DB_PRINTSYM(inwakeup, tsw->tsw_inwakeup); 2031 DB_PRINTSYM(ioctl, tsw->tsw_ioctl); 2032 DB_PRINTSYM(param, tsw->tsw_param); 2033 DB_PRINTSYM(modem, tsw->tsw_modem); 2034 DB_PRINTSYM(mmap, tsw->tsw_mmap); 2035 DB_PRINTSYM(pktnotify, tsw->tsw_pktnotify); 2036 DB_PRINTSYM(free, tsw->tsw_free); 2037 } 2038 static void 2039 _db_show_hooks(const char *sep, const struct ttyhook *th) 2040 { 2041 db_printf("%shook: ", sep); 2042 db_printsym((db_addr_t)th, DB_STGY_ANY); 2043 db_printf(" (%p)\n", th); 2044 if (th == NULL) 2045 return; 2046 DB_PRINTSYM(rint, th->th_rint); 2047 DB_PRINTSYM(rint_bypass, th->th_rint_bypass); 2048 DB_PRINTSYM(rint_done, th->th_rint_done); 2049 DB_PRINTSYM(rint_poll, th->th_rint_poll); 2050 DB_PRINTSYM(getc_inject, th->th_getc_inject); 2051 DB_PRINTSYM(getc_capture, th->th_getc_capture); 2052 DB_PRINTSYM(getc_poll, th->th_getc_poll); 2053 DB_PRINTSYM(close, th->th_close); 2054 } 2055 2056 static void 2057 _db_show_termios(const char *name, const struct termios *t) 2058 { 2059 2060 db_printf("%s: iflag 0x%x oflag 0x%x cflag 0x%x " 2061 "lflag 0x%x ispeed %u ospeed %u\n", name, 2062 t->c_iflag, t->c_oflag, t->c_cflag, t->c_lflag, 2063 t->c_ispeed, t->c_ospeed); 2064 } 2065 2066 /* DDB command to show TTY statistics. */ 2067 DB_SHOW_COMMAND(tty, db_show_tty) 2068 { 2069 struct tty *tp; 2070 2071 if (!have_addr) { 2072 db_printf("usage: show tty <addr>\n"); 2073 return; 2074 } 2075 tp = (struct tty *)addr; 2076 2077 db_printf("0x%p: %s\n", tp, tty_devname(tp)); 2078 db_printf("\tmtx: %p\n", tp->t_mtx); 2079 db_printf("\tflags: %b\n", tp->t_flags, TTY_FLAG_BITS); 2080 db_printf("\trevokecnt: %u\n", tp->t_revokecnt); 2081 2082 /* Buffering mechanisms. */ 2083 db_printf("\tinq: %p begin %u linestart %u reprint %u end %u " 2084 "nblocks %u quota %u\n", &tp->t_inq, tp->t_inq.ti_begin, 2085 tp->t_inq.ti_linestart, tp->t_inq.ti_reprint, tp->t_inq.ti_end, 2086 tp->t_inq.ti_nblocks, tp->t_inq.ti_quota); 2087 db_printf("\toutq: %p begin %u end %u nblocks %u quota %u\n", 2088 &tp->t_outq, tp->t_outq.to_begin, tp->t_outq.to_end, 2089 tp->t_outq.to_nblocks, tp->t_outq.to_quota); 2090 db_printf("\tinlow: %zu\n", tp->t_inlow); 2091 db_printf("\toutlow: %zu\n", tp->t_outlow); 2092 _db_show_termios("\ttermios", &tp->t_termios); 2093 db_printf("\twinsize: row %u col %u xpixel %u ypixel %u\n", 2094 tp->t_winsize.ws_row, tp->t_winsize.ws_col, 2095 tp->t_winsize.ws_xpixel, tp->t_winsize.ws_ypixel); 2096 db_printf("\tcolumn: %u\n", tp->t_column); 2097 db_printf("\twritepos: %u\n", tp->t_writepos); 2098 db_printf("\tcompatflags: 0x%x\n", tp->t_compatflags); 2099 2100 /* Init/lock-state devices. */ 2101 _db_show_termios("\ttermios_init_in", &tp->t_termios_init_in); 2102 _db_show_termios("\ttermios_init_out", &tp->t_termios_init_out); 2103 _db_show_termios("\ttermios_lock_in", &tp->t_termios_lock_in); 2104 _db_show_termios("\ttermios_lock_out", &tp->t_termios_lock_out); 2105 2106 /* Hooks */ 2107 _db_show_devsw("\t", tp->t_devsw); 2108 _db_show_hooks("\t", tp->t_hook); 2109 2110 /* Process info. */ 2111 db_printf("\tpgrp: %p gid %d jobc %d\n", tp->t_pgrp, 2112 tp->t_pgrp ? tp->t_pgrp->pg_id : 0, 2113 tp->t_pgrp ? tp->t_pgrp->pg_jobc : 0); 2114 db_printf("\tsession: %p", tp->t_session); 2115 if (tp->t_session != NULL) 2116 db_printf(" count %u leader %p tty %p sid %d login %s", 2117 tp->t_session->s_count, tp->t_session->s_leader, 2118 tp->t_session->s_ttyp, tp->t_session->s_sid, 2119 tp->t_session->s_login); 2120 db_printf("\n"); 2121 db_printf("\tsessioncnt: %u\n", tp->t_sessioncnt); 2122 db_printf("\tdevswsoftc: %p\n", tp->t_devswsoftc); 2123 db_printf("\thooksoftc: %p\n", tp->t_hooksoftc); 2124 db_printf("\tdev: %p\n", tp->t_dev); 2125 } 2126 2127 /* DDB command to list TTYs. */ 2128 DB_SHOW_ALL_COMMAND(ttys, db_show_all_ttys) 2129 { 2130 struct tty *tp; 2131 size_t isiz, osiz; 2132 int i, j; 2133 2134 /* Make the output look like `pstat -t'. */ 2135 db_printf("PTR "); 2136 #if defined(__LP64__) 2137 db_printf(" "); 2138 #endif 2139 db_printf(" LINE INQ CAN LIN LOW OUTQ USE LOW " 2140 "COL SESS PGID STATE\n"); 2141 2142 TAILQ_FOREACH(tp, &tty_list, t_list) { 2143 isiz = tp->t_inq.ti_nblocks * TTYINQ_DATASIZE; 2144 osiz = tp->t_outq.to_nblocks * TTYOUTQ_DATASIZE; 2145 2146 db_printf("%p %10s %5zu %4u %4u %4zu %5zu %4u %4zu %5u %5d %5d ", 2147 tp, 2148 tty_devname(tp), 2149 isiz, 2150 tp->t_inq.ti_linestart - tp->t_inq.ti_begin, 2151 tp->t_inq.ti_end - tp->t_inq.ti_linestart, 2152 isiz - tp->t_inlow, 2153 osiz, 2154 tp->t_outq.to_end - tp->t_outq.to_begin, 2155 osiz - tp->t_outlow, 2156 MIN(tp->t_column, 99999), 2157 tp->t_session ? tp->t_session->s_sid : 0, 2158 tp->t_pgrp ? tp->t_pgrp->pg_id : 0); 2159 2160 /* Flag bits. */ 2161 for (i = j = 0; ttystates[i].flag; i++) 2162 if (tp->t_flags & ttystates[i].flag) { 2163 db_printf("%c", ttystates[i].val); 2164 j++; 2165 } 2166 if (j == 0) 2167 db_printf("-"); 2168 db_printf("\n"); 2169 } 2170 } 2171 #endif /* DDB */ 2172