112}; 113 114#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 115 116struct pt_ioctl { 117 int pt_flags; 118 struct selinfo pt_selr, pt_selw; 119 u_char pt_send; 120 u_char pt_ucntl; 121 struct tty pt_tty; 122 dev_t devs, devc; 123 struct prison *pt_prison; 124}; 125 126#define PF_PKT 0x08 /* packet mode */ 127#define PF_STOPPED 0x10 /* user told stopped */ 128#define PF_REMOTE 0x20 /* remote and flow controlled input */ 129#define PF_NOSTOP 0x40 130#define PF_UCNTL 0x80 /* user control mode */ 131 132static char *names = "pqrsPQRS"; 133/* 134 * This function creates and initializes a pts/ptc pair 135 * 136 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 137 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 138 * 139 * XXX: define and add mapping of upper minor bits to allow more 140 * than 256 ptys. 141 */ 142static dev_t 143ptyinit(dev_t devc) 144{ 145 dev_t devs; 146 struct pt_ioctl *pt; 147 int n; 148 149 n = minor(devc); 150 /* For now we only map the lower 8 bits of the minor */ 151 if (n & ~0xff) 152 return (NODEV); 153 154 devc->si_flags &= ~SI_CHEAPCLONE; 155 156 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK | M_ZERO); 157 pt->devs = devs = make_dev(&pts_cdevsw, n, 158 UID_ROOT, GID_WHEEL, 0666, "tty%c%r", names[n / 32], n % 32); 159 pt->devc = devc; 160 161 devs->si_drv1 = devc->si_drv1 = pt; 162 devs->si_tty = devc->si_tty = &pt->pt_tty; 163 pt->pt_tty.t_dev = devs; 164 ttyregister(&pt->pt_tty); 165 return (devc); 166} 167 168/*ARGSUSED*/ 169static int 170ptsopen(dev, flag, devtype, td) 171 dev_t dev; 172 int flag, devtype; 173 struct thread *td; 174{ 175 struct tty *tp; 176 int error; 177 struct pt_ioctl *pti; 178 179 if (!dev->si_drv1) 180 return(ENXIO); 181 pti = dev->si_drv1; 182 tp = dev->si_tty; 183 if ((tp->t_state & TS_ISOPEN) == 0) { 184 ttychars(tp); /* Set up default chars */ 185 tp->t_iflag = TTYDEF_IFLAG; 186 tp->t_oflag = TTYDEF_OFLAG; 187 tp->t_lflag = TTYDEF_LFLAG; 188 tp->t_cflag = TTYDEF_CFLAG; 189 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 190 } else if (tp->t_state & TS_XCLUDE && suser(td)) { 191 return (EBUSY); 192 } else if (pti->pt_prison != td->td_ucred->cr_prison) { 193 return (EBUSY); 194 } 195 if (tp->t_oproc) /* Ctrlr still around. */ 196 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 197 while ((tp->t_state & TS_CARR_ON) == 0) { 198 if (flag&FNONBLOCK) 199 break; 200 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 201 "ptsopn", 0); 202 if (error) 203 return (error); 204 } 205 error = (*linesw[tp->t_line].l_open)(dev, tp); 206 if (error == 0) 207 ptcwakeup(tp, FREAD|FWRITE); 208 return (error); 209} 210 211static int 212ptsclose(dev, flag, mode, td) 213 dev_t dev; 214 int flag, mode; 215 struct thread *td; 216{ 217 struct tty *tp; 218 int err; 219 220 tp = dev->si_tty; 221 err = (*linesw[tp->t_line].l_close)(tp, flag); 222 ptsstop(tp, FREAD|FWRITE); 223 (void) ttyclose(tp); 224 return (err); 225} 226 227static int 228ptsread(dev, uio, flag) 229 dev_t dev; 230 struct uio *uio; 231 int flag; 232{ 233 struct thread *td = curthread; 234 struct proc *p = td->td_proc; 235 struct tty *tp = dev->si_tty; 236 struct pt_ioctl *pti = dev->si_drv1; 237 struct pgrp *pg; 238 int error = 0; 239 240again: 241 if (pti->pt_flags & PF_REMOTE) { 242 while (isbackground(p, tp)) { 243 sx_slock(&proctree_lock); 244 PROC_LOCK(p); 245 if (SIGISMEMBER(p->p_sigignore, SIGTTIN) || 246 SIGISMEMBER(p->p_sigmask, SIGTTIN) || 247 p->p_pgrp->pg_jobc == 0 || p->p_flag & P_PPWAIT) { 248 PROC_UNLOCK(p); 249 sx_sunlock(&proctree_lock); 250 return (EIO); 251 } 252 pg = p->p_pgrp; 253 PROC_UNLOCK(p); 254 PGRP_LOCK(pg); 255 sx_sunlock(&proctree_lock); 256 pgsignal(pg, SIGTTIN, 1); 257 PGRP_UNLOCK(pg); 258 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 259 0); 260 if (error) 261 return (error); 262 } 263 if (tp->t_canq.c_cc == 0) { 264 if (flag & IO_NDELAY) 265 return (EWOULDBLOCK); 266 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 267 "ptsin", 0); 268 if (error) 269 return (error); 270 goto again; 271 } 272 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 273 if (ureadc(getc(&tp->t_canq), uio) < 0) { 274 error = EFAULT; 275 break; 276 } 277 if (tp->t_canq.c_cc == 1) 278 (void) getc(&tp->t_canq); 279 if (tp->t_canq.c_cc) 280 return (error); 281 } else 282 if (tp->t_oproc) 283 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 284 ptcwakeup(tp, FWRITE); 285 return (error); 286} 287 288/* 289 * Write to pseudo-tty. 290 * Wakeups of controlling tty will happen 291 * indirectly, when tty driver calls ptsstart. 292 */ 293static int 294ptswrite(dev, uio, flag) 295 dev_t dev; 296 struct uio *uio; 297 int flag; 298{ 299 struct tty *tp; 300 301 tp = dev->si_tty; 302 if (tp->t_oproc == 0) 303 return (EIO); 304 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 305} 306 307/* 308 * Start output on pseudo-tty. 309 * Wake up process selecting or sleeping for input from controlling tty. 310 */ 311static void 312ptsstart(tp) 313 struct tty *tp; 314{ 315 struct pt_ioctl *pti = tp->t_dev->si_drv1; 316 317 if (tp->t_state & TS_TTSTOP) 318 return; 319 if (pti->pt_flags & PF_STOPPED) { 320 pti->pt_flags &= ~PF_STOPPED; 321 pti->pt_send = TIOCPKT_START; 322 } 323 ptcwakeup(tp, FREAD); 324} 325 326static void 327ptcwakeup(tp, flag) 328 struct tty *tp; 329 int flag; 330{ 331 struct pt_ioctl *pti = tp->t_dev->si_drv1; 332 333 if (flag & FREAD) { 334 selwakeup(&pti->pt_selr); 335 wakeup(TSA_PTC_READ(tp)); 336 } 337 if (flag & FWRITE) { 338 selwakeup(&pti->pt_selw); 339 wakeup(TSA_PTC_WRITE(tp)); 340 } 341} 342 343static int 344ptcopen(dev, flag, devtype, td) 345 dev_t dev; 346 int flag, devtype; 347 struct thread *td; 348{ 349 struct tty *tp; 350 struct pt_ioctl *pti; 351 352 if (!dev->si_drv1) 353 ptyinit(dev); 354 if (!dev->si_drv1) 355 return(ENXIO); 356 tp = dev->si_tty; 357 if (tp->t_oproc) 358 return (EIO); 359 tp->t_timeout = -1; 360 tp->t_oproc = ptsstart; 361 tp->t_stop = ptsstop; 362 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 363 tp->t_lflag &= ~EXTPROC; 364 pti = dev->si_drv1; 365 pti->pt_prison = td->td_ucred->cr_prison; 366 pti->pt_flags = 0; 367 pti->pt_send = 0; 368 pti->pt_ucntl = 0; 369 return (0); 370} 371 372static int 373ptcclose(dev, flags, fmt, td) 374 dev_t dev; 375 int flags; 376 int fmt; 377 struct thread *td; 378{ 379 struct tty *tp; 380 381 tp = dev->si_tty; 382 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 383 384 /* 385 * XXX MDMBUF makes no sense for ptys but would inhibit the above 386 * l_modem(). CLOCAL makes sense but isn't supported. Special 387 * l_modem()s that ignore carrier drop make no sense for ptys but 388 * may be in use because other parts of the line discipline make 389 * sense for ptys. Recover by doing everything that a normal 390 * ttymodem() would have done except for sending a SIGHUP. 391 */ 392 if (tp->t_state & TS_ISOPEN) { 393 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 394 tp->t_state |= TS_ZOMBIE; 395 ttyflush(tp, FREAD | FWRITE); 396 } 397 398 tp->t_oproc = 0; /* mark closed */ 399 return (0); 400} 401 402static int 403ptcread(dev, uio, flag) 404 dev_t dev; 405 struct uio *uio; 406 int flag; 407{ 408 struct tty *tp = dev->si_tty; 409 struct pt_ioctl *pti = dev->si_drv1; 410 char buf[BUFSIZ]; 411 int error = 0, cc; 412 413 /* 414 * We want to block until the slave 415 * is open, and there's something to read; 416 * but if we lost the slave or we're NBIO, 417 * then return the appropriate error instead. 418 */ 419 for (;;) { 420 if (tp->t_state&TS_ISOPEN) { 421 if (pti->pt_flags&PF_PKT && pti->pt_send) { 422 error = ureadc((int)pti->pt_send, uio); 423 if (error) 424 return (error); 425 if (pti->pt_send & TIOCPKT_IOCTL) { 426 cc = min(uio->uio_resid, 427 sizeof(tp->t_termios)); 428 uiomove(&tp->t_termios, cc, uio); 429 } 430 pti->pt_send = 0; 431 return (0); 432 } 433 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 434 error = ureadc((int)pti->pt_ucntl, uio); 435 if (error) 436 return (error); 437 pti->pt_ucntl = 0; 438 return (0); 439 } 440 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 441 break; 442 } 443 if ((tp->t_state & TS_CONNECTED) == 0) 444 return (0); /* EOF */ 445 if (flag & IO_NDELAY) 446 return (EWOULDBLOCK); 447 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 448 if (error) 449 return (error); 450 } 451 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 452 error = ureadc(0, uio); 453 while (uio->uio_resid > 0 && error == 0) { 454 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 455 if (cc <= 0) 456 break; 457 error = uiomove(buf, cc, uio); 458 } 459 ttwwakeup(tp); 460 return (error); 461} 462 463static void 464ptsstop(tp, flush) 465 struct tty *tp; 466 int flush; 467{ 468 struct pt_ioctl *pti = tp->t_dev->si_drv1; 469 int flag; 470 471 /* note: FLUSHREAD and FLUSHWRITE already ok */ 472 if (flush == 0) { 473 flush = TIOCPKT_STOP; 474 pti->pt_flags |= PF_STOPPED; 475 } else 476 pti->pt_flags &= ~PF_STOPPED; 477 pti->pt_send |= flush; 478 /* change of perspective */ 479 flag = 0; 480 if (flush & FREAD) 481 flag |= FWRITE; 482 if (flush & FWRITE) 483 flag |= FREAD; 484 ptcwakeup(tp, flag); 485} 486 487static int 488ptcpoll(dev, events, td) 489 dev_t dev; 490 int events; 491 struct thread *td; 492{ 493 struct tty *tp = dev->si_tty; 494 struct pt_ioctl *pti = dev->si_drv1; 495 int revents = 0; 496 int s; 497 498 if ((tp->t_state & TS_CONNECTED) == 0) 499 return (seltrue(dev, events, td) | POLLHUP); 500 501 /* 502 * Need to block timeouts (ttrstart). 503 */ 504 s = spltty(); 505 506 if (events & (POLLIN | POLLRDNORM)) 507 if ((tp->t_state & TS_ISOPEN) && 508 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 509 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 510 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 511 revents |= events & (POLLIN | POLLRDNORM); 512 513 if (events & (POLLOUT | POLLWRNORM)) 514 if (tp->t_state & TS_ISOPEN && 515 ((pti->pt_flags & PF_REMOTE) ? 516 (tp->t_canq.c_cc == 0) : 517 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 518 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON))))) 519 revents |= events & (POLLOUT | POLLWRNORM); 520 521 if (events & POLLHUP) 522 if ((tp->t_state & TS_CARR_ON) == 0) 523 revents |= POLLHUP; 524 525 if (revents == 0) { 526 if (events & (POLLIN | POLLRDNORM)) 527 selrecord(td, &pti->pt_selr); 528 529 if (events & (POLLOUT | POLLWRNORM)) 530 selrecord(td, &pti->pt_selw); 531 } 532 splx(s); 533 534 return (revents); 535} 536 537static int 538ptcwrite(dev, uio, flag) 539 dev_t dev; 540 struct uio *uio; 541 int flag; 542{ 543 struct tty *tp = dev->si_tty; 544 u_char *cp = 0; 545 int cc = 0; 546 u_char locbuf[BUFSIZ]; 547 int cnt = 0; 548 struct pt_ioctl *pti = dev->si_drv1; 549 int error = 0; 550 551again: 552 if ((tp->t_state&TS_ISOPEN) == 0) 553 goto block; 554 if (pti->pt_flags & PF_REMOTE) { 555 if (tp->t_canq.c_cc) 556 goto block; 557 while ((uio->uio_resid > 0 || cc > 0) && 558 tp->t_canq.c_cc < TTYHOG - 1) { 559 if (cc == 0) { 560 cc = min(uio->uio_resid, BUFSIZ); 561 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 562 cp = locbuf; 563 error = uiomove(cp, cc, uio); 564 if (error) 565 return (error); 566 /* check again for safety */ 567 if ((tp->t_state & TS_ISOPEN) == 0) { 568 /* adjust as usual */ 569 uio->uio_resid += cc; 570 return (EIO); 571 } 572 } 573 if (cc > 0) { 574 cc = b_to_q((char *)cp, cc, &tp->t_canq); 575 /* 576 * XXX we don't guarantee that the canq size 577 * is >= TTYHOG, so the above b_to_q() may 578 * leave some bytes uncopied. However, space 579 * is guaranteed for the null terminator if 580 * we don't fail here since (TTYHOG - 1) is 581 * not a multiple of CBSIZE. 582 */ 583 if (cc > 0) 584 break; 585 } 586 } 587 /* adjust for data copied in but not written */ 588 uio->uio_resid += cc; 589 (void) putc(0, &tp->t_canq); 590 ttwakeup(tp); 591 wakeup(TSA_PTS_READ(tp)); 592 return (0); 593 } 594 while (uio->uio_resid > 0 || cc > 0) { 595 if (cc == 0) { 596 cc = min(uio->uio_resid, BUFSIZ); 597 cp = locbuf; 598 error = uiomove(cp, cc, uio); 599 if (error) 600 return (error); 601 /* check again for safety */ 602 if ((tp->t_state & TS_ISOPEN) == 0) { 603 /* adjust for data copied in but not written */ 604 uio->uio_resid += cc; 605 return (EIO); 606 } 607 } 608 while (cc > 0) { 609 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 610 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) { 611 wakeup(TSA_HUP_OR_INPUT(tp)); 612 goto block; 613 } 614 (*linesw[tp->t_line].l_rint)(*cp++, tp); 615 cnt++; 616 cc--; 617 } 618 cc = 0; 619 } 620 return (0); 621block: 622 /* 623 * Come here to wait for slave to open, for space 624 * in outq, or space in rawq, or an empty canq. 625 */ 626 if ((tp->t_state & TS_CONNECTED) == 0) { 627 /* adjust for data copied in but not written */ 628 uio->uio_resid += cc; 629 return (EIO); 630 } 631 if (flag & IO_NDELAY) { 632 /* adjust for data copied in but not written */ 633 uio->uio_resid += cc; 634 if (cnt == 0) 635 return (EWOULDBLOCK); 636 return (0); 637 } 638 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 639 if (error) { 640 /* adjust for data copied in but not written */ 641 uio->uio_resid += cc; 642 return (error); 643 } 644 goto again; 645} 646 647/*ARGSUSED*/ 648static int 649ptyioctl(dev, cmd, data, flag, td) 650 dev_t dev; 651 u_long cmd; 652 caddr_t data; 653 int flag; 654 struct thread *td; 655{ 656 struct tty *tp = dev->si_tty; 657 struct pt_ioctl *pti = dev->si_drv1; 658 u_char *cc = tp->t_cc; 659 int stop, error; 660 661 if (devsw(dev)->d_open == ptcopen) { 662 switch (cmd) { 663 664 case TIOCGPGRP: 665 /* 666 * We avoid calling ttioctl on the controller since, 667 * in that case, tp must be the controlling terminal. 668 */ 669 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 670 return (0); 671 672 case TIOCPKT: 673 if (*(int *)data) { 674 if (pti->pt_flags & PF_UCNTL) 675 return (EINVAL); 676 pti->pt_flags |= PF_PKT; 677 } else 678 pti->pt_flags &= ~PF_PKT; 679 return (0); 680 681 case TIOCUCNTL: 682 if (*(int *)data) { 683 if (pti->pt_flags & PF_PKT) 684 return (EINVAL); 685 pti->pt_flags |= PF_UCNTL; 686 } else 687 pti->pt_flags &= ~PF_UCNTL; 688 return (0); 689 690 case TIOCREMOTE: 691 if (*(int *)data) 692 pti->pt_flags |= PF_REMOTE; 693 else 694 pti->pt_flags &= ~PF_REMOTE; 695 ttyflush(tp, FREAD|FWRITE); 696 return (0); 697 } 698 699 /* 700 * The rest of the ioctls shouldn't be called until 701 * the slave is open. 702 */ 703 if ((tp->t_state & TS_ISOPEN) == 0) 704 return (EAGAIN); 705 706 switch (cmd) { 707#ifdef COMPAT_43 708 case TIOCSETP: 709 case TIOCSETN: 710#endif 711 case TIOCSETD: 712 case TIOCSETA: 713 case TIOCSETAW: 714 case TIOCSETAF: 715 /* 716 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 717 * ttywflush(tp) will hang if there are characters in 718 * the outq. 719 */ 720 ndflush(&tp->t_outq, tp->t_outq.c_cc); 721 break; 722 723 case TIOCSIG: 724 if (*(unsigned int *)data >= NSIG || 725 *(unsigned int *)data == 0) 726 return(EINVAL); 727 if ((tp->t_lflag&NOFLSH) == 0) 728 ttyflush(tp, FREAD|FWRITE); 729 if (tp->t_pgrp != NULL) { 730 PGRP_LOCK(tp->t_pgrp); 731 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 732 PGRP_UNLOCK(tp->t_pgrp); 733 } 734 if ((*(unsigned int *)data == SIGINFO) && 735 ((tp->t_lflag&NOKERNINFO) == 0)) 736 ttyinfo(tp); 737 return(0); 738 } 739 } 740 if (cmd == TIOCEXT) { 741 /* 742 * When the EXTPROC bit is being toggled, we need 743 * to send an TIOCPKT_IOCTL if the packet driver 744 * is turned on. 745 */ 746 if (*(int *)data) { 747 if (pti->pt_flags & PF_PKT) { 748 pti->pt_send |= TIOCPKT_IOCTL; 749 ptcwakeup(tp, FREAD); 750 } 751 tp->t_lflag |= EXTPROC; 752 } else { 753 if ((tp->t_lflag & EXTPROC) && 754 (pti->pt_flags & PF_PKT)) { 755 pti->pt_send |= TIOCPKT_IOCTL; 756 ptcwakeup(tp, FREAD); 757 } 758 tp->t_lflag &= ~EXTPROC; 759 } 760 return(0); 761 } 762 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td); 763 if (error == ENOIOCTL) 764 error = ttioctl(tp, cmd, data, flag); 765 if (error == ENOIOCTL) { 766 if (pti->pt_flags & PF_UCNTL && 767 (cmd & ~0xff) == UIOCCMD(0)) { 768 if (cmd & 0xff) { 769 pti->pt_ucntl = (u_char)cmd; 770 ptcwakeup(tp, FREAD); 771 } 772 return (0); 773 } 774 error = ENOTTY; 775 } 776 /* 777 * If external processing and packet mode send ioctl packet. 778 */ 779 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 780 switch(cmd) { 781 case TIOCSETA: 782 case TIOCSETAW: 783 case TIOCSETAF: 784#ifdef COMPAT_43 785 case TIOCSETP: 786 case TIOCSETN: 787#endif 788#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 789 case TIOCSETC: 790 case TIOCSLTC: 791 case TIOCLBIS: 792 case TIOCLBIC: 793 case TIOCLSET: 794#endif 795 pti->pt_send |= TIOCPKT_IOCTL; 796 ptcwakeup(tp, FREAD); 797 default: 798 break; 799 } 800 } 801 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 802 && CCEQ(cc[VSTART], CTRL('q')); 803 if (pti->pt_flags & PF_NOSTOP) { 804 if (stop) { 805 pti->pt_send &= ~TIOCPKT_NOSTOP; 806 pti->pt_send |= TIOCPKT_DOSTOP; 807 pti->pt_flags &= ~PF_NOSTOP; 808 ptcwakeup(tp, FREAD); 809 } 810 } else { 811 if (!stop) { 812 pti->pt_send &= ~TIOCPKT_DOSTOP; 813 pti->pt_send |= TIOCPKT_NOSTOP; 814 pti->pt_flags |= PF_NOSTOP; 815 ptcwakeup(tp, FREAD); 816 } 817 } 818 return (error); 819} 820 821 822static void ptc_drvinit(void *unused); 823 824static void pty_clone(void *arg, char *name, int namelen, dev_t *dev); 825 826static void 827pty_clone(arg, name, namelen, dev) 828 void *arg; 829 char *name; 830 int namelen; 831 dev_t *dev; 832{ 833 int u; 834 835 if (*dev != NODEV) 836 return; 837 if (bcmp(name, "pty", 3) != 0) 838 return; 839 if (name[5] != '\0') 840 return; 841 switch (name[3]) { 842 case 'p': u = 0; break; 843 case 'q': u = 32; break; 844 case 'r': u = 64; break; 845 case 's': u = 96; break; 846 case 'P': u = 128; break; 847 case 'Q': u = 160; break; 848 case 'R': u = 192; break; 849 case 'S': u = 224; break; 850 default: return; 851 } 852 if (name[4] >= '0' && name[4] <= '9') 853 u += name[4] - '0'; 854 else if (name[4] >= 'a' && name[4] <= 'v') 855 u += name[4] - 'a' + 10; 856 else 857 return; 858 *dev = make_dev(&ptc_cdevsw, u, 859 UID_ROOT, GID_WHEEL, 0666, "pty%c%r", names[u / 32], u % 32); 860 (*dev)->si_flags |= SI_CHEAPCLONE; 861 return; 862} 863 864static void 865ptc_drvinit(unused) 866 void *unused; 867{ 868 869 EVENTHANDLER_REGISTER(dev_clone, pty_clone, 0, 1000); 870} 871 872SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
| 104}; 105 106#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 107 108struct pt_ioctl { 109 int pt_flags; 110 struct selinfo pt_selr, pt_selw; 111 u_char pt_send; 112 u_char pt_ucntl; 113 struct tty pt_tty; 114 dev_t devs, devc; 115 struct prison *pt_prison; 116}; 117 118#define PF_PKT 0x08 /* packet mode */ 119#define PF_STOPPED 0x10 /* user told stopped */ 120#define PF_REMOTE 0x20 /* remote and flow controlled input */ 121#define PF_NOSTOP 0x40 122#define PF_UCNTL 0x80 /* user control mode */ 123 124static char *names = "pqrsPQRS"; 125/* 126 * This function creates and initializes a pts/ptc pair 127 * 128 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 129 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 130 * 131 * XXX: define and add mapping of upper minor bits to allow more 132 * than 256 ptys. 133 */ 134static dev_t 135ptyinit(dev_t devc) 136{ 137 dev_t devs; 138 struct pt_ioctl *pt; 139 int n; 140 141 n = minor(devc); 142 /* For now we only map the lower 8 bits of the minor */ 143 if (n & ~0xff) 144 return (NODEV); 145 146 devc->si_flags &= ~SI_CHEAPCLONE; 147 148 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK | M_ZERO); 149 pt->devs = devs = make_dev(&pts_cdevsw, n, 150 UID_ROOT, GID_WHEEL, 0666, "tty%c%r", names[n / 32], n % 32); 151 pt->devc = devc; 152 153 devs->si_drv1 = devc->si_drv1 = pt; 154 devs->si_tty = devc->si_tty = &pt->pt_tty; 155 pt->pt_tty.t_dev = devs; 156 ttyregister(&pt->pt_tty); 157 return (devc); 158} 159 160/*ARGSUSED*/ 161static int 162ptsopen(dev, flag, devtype, td) 163 dev_t dev; 164 int flag, devtype; 165 struct thread *td; 166{ 167 struct tty *tp; 168 int error; 169 struct pt_ioctl *pti; 170 171 if (!dev->si_drv1) 172 return(ENXIO); 173 pti = dev->si_drv1; 174 tp = dev->si_tty; 175 if ((tp->t_state & TS_ISOPEN) == 0) { 176 ttychars(tp); /* Set up default chars */ 177 tp->t_iflag = TTYDEF_IFLAG; 178 tp->t_oflag = TTYDEF_OFLAG; 179 tp->t_lflag = TTYDEF_LFLAG; 180 tp->t_cflag = TTYDEF_CFLAG; 181 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 182 } else if (tp->t_state & TS_XCLUDE && suser(td)) { 183 return (EBUSY); 184 } else if (pti->pt_prison != td->td_ucred->cr_prison) { 185 return (EBUSY); 186 } 187 if (tp->t_oproc) /* Ctrlr still around. */ 188 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 189 while ((tp->t_state & TS_CARR_ON) == 0) { 190 if (flag&FNONBLOCK) 191 break; 192 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 193 "ptsopn", 0); 194 if (error) 195 return (error); 196 } 197 error = (*linesw[tp->t_line].l_open)(dev, tp); 198 if (error == 0) 199 ptcwakeup(tp, FREAD|FWRITE); 200 return (error); 201} 202 203static int 204ptsclose(dev, flag, mode, td) 205 dev_t dev; 206 int flag, mode; 207 struct thread *td; 208{ 209 struct tty *tp; 210 int err; 211 212 tp = dev->si_tty; 213 err = (*linesw[tp->t_line].l_close)(tp, flag); 214 ptsstop(tp, FREAD|FWRITE); 215 (void) ttyclose(tp); 216 return (err); 217} 218 219static int 220ptsread(dev, uio, flag) 221 dev_t dev; 222 struct uio *uio; 223 int flag; 224{ 225 struct thread *td = curthread; 226 struct proc *p = td->td_proc; 227 struct tty *tp = dev->si_tty; 228 struct pt_ioctl *pti = dev->si_drv1; 229 struct pgrp *pg; 230 int error = 0; 231 232again: 233 if (pti->pt_flags & PF_REMOTE) { 234 while (isbackground(p, tp)) { 235 sx_slock(&proctree_lock); 236 PROC_LOCK(p); 237 if (SIGISMEMBER(p->p_sigignore, SIGTTIN) || 238 SIGISMEMBER(p->p_sigmask, SIGTTIN) || 239 p->p_pgrp->pg_jobc == 0 || p->p_flag & P_PPWAIT) { 240 PROC_UNLOCK(p); 241 sx_sunlock(&proctree_lock); 242 return (EIO); 243 } 244 pg = p->p_pgrp; 245 PROC_UNLOCK(p); 246 PGRP_LOCK(pg); 247 sx_sunlock(&proctree_lock); 248 pgsignal(pg, SIGTTIN, 1); 249 PGRP_UNLOCK(pg); 250 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 251 0); 252 if (error) 253 return (error); 254 } 255 if (tp->t_canq.c_cc == 0) { 256 if (flag & IO_NDELAY) 257 return (EWOULDBLOCK); 258 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 259 "ptsin", 0); 260 if (error) 261 return (error); 262 goto again; 263 } 264 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 265 if (ureadc(getc(&tp->t_canq), uio) < 0) { 266 error = EFAULT; 267 break; 268 } 269 if (tp->t_canq.c_cc == 1) 270 (void) getc(&tp->t_canq); 271 if (tp->t_canq.c_cc) 272 return (error); 273 } else 274 if (tp->t_oproc) 275 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 276 ptcwakeup(tp, FWRITE); 277 return (error); 278} 279 280/* 281 * Write to pseudo-tty. 282 * Wakeups of controlling tty will happen 283 * indirectly, when tty driver calls ptsstart. 284 */ 285static int 286ptswrite(dev, uio, flag) 287 dev_t dev; 288 struct uio *uio; 289 int flag; 290{ 291 struct tty *tp; 292 293 tp = dev->si_tty; 294 if (tp->t_oproc == 0) 295 return (EIO); 296 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 297} 298 299/* 300 * Start output on pseudo-tty. 301 * Wake up process selecting or sleeping for input from controlling tty. 302 */ 303static void 304ptsstart(tp) 305 struct tty *tp; 306{ 307 struct pt_ioctl *pti = tp->t_dev->si_drv1; 308 309 if (tp->t_state & TS_TTSTOP) 310 return; 311 if (pti->pt_flags & PF_STOPPED) { 312 pti->pt_flags &= ~PF_STOPPED; 313 pti->pt_send = TIOCPKT_START; 314 } 315 ptcwakeup(tp, FREAD); 316} 317 318static void 319ptcwakeup(tp, flag) 320 struct tty *tp; 321 int flag; 322{ 323 struct pt_ioctl *pti = tp->t_dev->si_drv1; 324 325 if (flag & FREAD) { 326 selwakeup(&pti->pt_selr); 327 wakeup(TSA_PTC_READ(tp)); 328 } 329 if (flag & FWRITE) { 330 selwakeup(&pti->pt_selw); 331 wakeup(TSA_PTC_WRITE(tp)); 332 } 333} 334 335static int 336ptcopen(dev, flag, devtype, td) 337 dev_t dev; 338 int flag, devtype; 339 struct thread *td; 340{ 341 struct tty *tp; 342 struct pt_ioctl *pti; 343 344 if (!dev->si_drv1) 345 ptyinit(dev); 346 if (!dev->si_drv1) 347 return(ENXIO); 348 tp = dev->si_tty; 349 if (tp->t_oproc) 350 return (EIO); 351 tp->t_timeout = -1; 352 tp->t_oproc = ptsstart; 353 tp->t_stop = ptsstop; 354 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 355 tp->t_lflag &= ~EXTPROC; 356 pti = dev->si_drv1; 357 pti->pt_prison = td->td_ucred->cr_prison; 358 pti->pt_flags = 0; 359 pti->pt_send = 0; 360 pti->pt_ucntl = 0; 361 return (0); 362} 363 364static int 365ptcclose(dev, flags, fmt, td) 366 dev_t dev; 367 int flags; 368 int fmt; 369 struct thread *td; 370{ 371 struct tty *tp; 372 373 tp = dev->si_tty; 374 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 375 376 /* 377 * XXX MDMBUF makes no sense for ptys but would inhibit the above 378 * l_modem(). CLOCAL makes sense but isn't supported. Special 379 * l_modem()s that ignore carrier drop make no sense for ptys but 380 * may be in use because other parts of the line discipline make 381 * sense for ptys. Recover by doing everything that a normal 382 * ttymodem() would have done except for sending a SIGHUP. 383 */ 384 if (tp->t_state & TS_ISOPEN) { 385 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 386 tp->t_state |= TS_ZOMBIE; 387 ttyflush(tp, FREAD | FWRITE); 388 } 389 390 tp->t_oproc = 0; /* mark closed */ 391 return (0); 392} 393 394static int 395ptcread(dev, uio, flag) 396 dev_t dev; 397 struct uio *uio; 398 int flag; 399{ 400 struct tty *tp = dev->si_tty; 401 struct pt_ioctl *pti = dev->si_drv1; 402 char buf[BUFSIZ]; 403 int error = 0, cc; 404 405 /* 406 * We want to block until the slave 407 * is open, and there's something to read; 408 * but if we lost the slave or we're NBIO, 409 * then return the appropriate error instead. 410 */ 411 for (;;) { 412 if (tp->t_state&TS_ISOPEN) { 413 if (pti->pt_flags&PF_PKT && pti->pt_send) { 414 error = ureadc((int)pti->pt_send, uio); 415 if (error) 416 return (error); 417 if (pti->pt_send & TIOCPKT_IOCTL) { 418 cc = min(uio->uio_resid, 419 sizeof(tp->t_termios)); 420 uiomove(&tp->t_termios, cc, uio); 421 } 422 pti->pt_send = 0; 423 return (0); 424 } 425 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 426 error = ureadc((int)pti->pt_ucntl, uio); 427 if (error) 428 return (error); 429 pti->pt_ucntl = 0; 430 return (0); 431 } 432 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 433 break; 434 } 435 if ((tp->t_state & TS_CONNECTED) == 0) 436 return (0); /* EOF */ 437 if (flag & IO_NDELAY) 438 return (EWOULDBLOCK); 439 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 440 if (error) 441 return (error); 442 } 443 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 444 error = ureadc(0, uio); 445 while (uio->uio_resid > 0 && error == 0) { 446 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 447 if (cc <= 0) 448 break; 449 error = uiomove(buf, cc, uio); 450 } 451 ttwwakeup(tp); 452 return (error); 453} 454 455static void 456ptsstop(tp, flush) 457 struct tty *tp; 458 int flush; 459{ 460 struct pt_ioctl *pti = tp->t_dev->si_drv1; 461 int flag; 462 463 /* note: FLUSHREAD and FLUSHWRITE already ok */ 464 if (flush == 0) { 465 flush = TIOCPKT_STOP; 466 pti->pt_flags |= PF_STOPPED; 467 } else 468 pti->pt_flags &= ~PF_STOPPED; 469 pti->pt_send |= flush; 470 /* change of perspective */ 471 flag = 0; 472 if (flush & FREAD) 473 flag |= FWRITE; 474 if (flush & FWRITE) 475 flag |= FREAD; 476 ptcwakeup(tp, flag); 477} 478 479static int 480ptcpoll(dev, events, td) 481 dev_t dev; 482 int events; 483 struct thread *td; 484{ 485 struct tty *tp = dev->si_tty; 486 struct pt_ioctl *pti = dev->si_drv1; 487 int revents = 0; 488 int s; 489 490 if ((tp->t_state & TS_CONNECTED) == 0) 491 return (seltrue(dev, events, td) | POLLHUP); 492 493 /* 494 * Need to block timeouts (ttrstart). 495 */ 496 s = spltty(); 497 498 if (events & (POLLIN | POLLRDNORM)) 499 if ((tp->t_state & TS_ISOPEN) && 500 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 501 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 502 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 503 revents |= events & (POLLIN | POLLRDNORM); 504 505 if (events & (POLLOUT | POLLWRNORM)) 506 if (tp->t_state & TS_ISOPEN && 507 ((pti->pt_flags & PF_REMOTE) ? 508 (tp->t_canq.c_cc == 0) : 509 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 510 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON))))) 511 revents |= events & (POLLOUT | POLLWRNORM); 512 513 if (events & POLLHUP) 514 if ((tp->t_state & TS_CARR_ON) == 0) 515 revents |= POLLHUP; 516 517 if (revents == 0) { 518 if (events & (POLLIN | POLLRDNORM)) 519 selrecord(td, &pti->pt_selr); 520 521 if (events & (POLLOUT | POLLWRNORM)) 522 selrecord(td, &pti->pt_selw); 523 } 524 splx(s); 525 526 return (revents); 527} 528 529static int 530ptcwrite(dev, uio, flag) 531 dev_t dev; 532 struct uio *uio; 533 int flag; 534{ 535 struct tty *tp = dev->si_tty; 536 u_char *cp = 0; 537 int cc = 0; 538 u_char locbuf[BUFSIZ]; 539 int cnt = 0; 540 struct pt_ioctl *pti = dev->si_drv1; 541 int error = 0; 542 543again: 544 if ((tp->t_state&TS_ISOPEN) == 0) 545 goto block; 546 if (pti->pt_flags & PF_REMOTE) { 547 if (tp->t_canq.c_cc) 548 goto block; 549 while ((uio->uio_resid > 0 || cc > 0) && 550 tp->t_canq.c_cc < TTYHOG - 1) { 551 if (cc == 0) { 552 cc = min(uio->uio_resid, BUFSIZ); 553 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 554 cp = locbuf; 555 error = uiomove(cp, cc, uio); 556 if (error) 557 return (error); 558 /* check again for safety */ 559 if ((tp->t_state & TS_ISOPEN) == 0) { 560 /* adjust as usual */ 561 uio->uio_resid += cc; 562 return (EIO); 563 } 564 } 565 if (cc > 0) { 566 cc = b_to_q((char *)cp, cc, &tp->t_canq); 567 /* 568 * XXX we don't guarantee that the canq size 569 * is >= TTYHOG, so the above b_to_q() may 570 * leave some bytes uncopied. However, space 571 * is guaranteed for the null terminator if 572 * we don't fail here since (TTYHOG - 1) is 573 * not a multiple of CBSIZE. 574 */ 575 if (cc > 0) 576 break; 577 } 578 } 579 /* adjust for data copied in but not written */ 580 uio->uio_resid += cc; 581 (void) putc(0, &tp->t_canq); 582 ttwakeup(tp); 583 wakeup(TSA_PTS_READ(tp)); 584 return (0); 585 } 586 while (uio->uio_resid > 0 || cc > 0) { 587 if (cc == 0) { 588 cc = min(uio->uio_resid, BUFSIZ); 589 cp = locbuf; 590 error = uiomove(cp, cc, uio); 591 if (error) 592 return (error); 593 /* check again for safety */ 594 if ((tp->t_state & TS_ISOPEN) == 0) { 595 /* adjust for data copied in but not written */ 596 uio->uio_resid += cc; 597 return (EIO); 598 } 599 } 600 while (cc > 0) { 601 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 602 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) { 603 wakeup(TSA_HUP_OR_INPUT(tp)); 604 goto block; 605 } 606 (*linesw[tp->t_line].l_rint)(*cp++, tp); 607 cnt++; 608 cc--; 609 } 610 cc = 0; 611 } 612 return (0); 613block: 614 /* 615 * Come here to wait for slave to open, for space 616 * in outq, or space in rawq, or an empty canq. 617 */ 618 if ((tp->t_state & TS_CONNECTED) == 0) { 619 /* adjust for data copied in but not written */ 620 uio->uio_resid += cc; 621 return (EIO); 622 } 623 if (flag & IO_NDELAY) { 624 /* adjust for data copied in but not written */ 625 uio->uio_resid += cc; 626 if (cnt == 0) 627 return (EWOULDBLOCK); 628 return (0); 629 } 630 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 631 if (error) { 632 /* adjust for data copied in but not written */ 633 uio->uio_resid += cc; 634 return (error); 635 } 636 goto again; 637} 638 639/*ARGSUSED*/ 640static int 641ptyioctl(dev, cmd, data, flag, td) 642 dev_t dev; 643 u_long cmd; 644 caddr_t data; 645 int flag; 646 struct thread *td; 647{ 648 struct tty *tp = dev->si_tty; 649 struct pt_ioctl *pti = dev->si_drv1; 650 u_char *cc = tp->t_cc; 651 int stop, error; 652 653 if (devsw(dev)->d_open == ptcopen) { 654 switch (cmd) { 655 656 case TIOCGPGRP: 657 /* 658 * We avoid calling ttioctl on the controller since, 659 * in that case, tp must be the controlling terminal. 660 */ 661 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 662 return (0); 663 664 case TIOCPKT: 665 if (*(int *)data) { 666 if (pti->pt_flags & PF_UCNTL) 667 return (EINVAL); 668 pti->pt_flags |= PF_PKT; 669 } else 670 pti->pt_flags &= ~PF_PKT; 671 return (0); 672 673 case TIOCUCNTL: 674 if (*(int *)data) { 675 if (pti->pt_flags & PF_PKT) 676 return (EINVAL); 677 pti->pt_flags |= PF_UCNTL; 678 } else 679 pti->pt_flags &= ~PF_UCNTL; 680 return (0); 681 682 case TIOCREMOTE: 683 if (*(int *)data) 684 pti->pt_flags |= PF_REMOTE; 685 else 686 pti->pt_flags &= ~PF_REMOTE; 687 ttyflush(tp, FREAD|FWRITE); 688 return (0); 689 } 690 691 /* 692 * The rest of the ioctls shouldn't be called until 693 * the slave is open. 694 */ 695 if ((tp->t_state & TS_ISOPEN) == 0) 696 return (EAGAIN); 697 698 switch (cmd) { 699#ifdef COMPAT_43 700 case TIOCSETP: 701 case TIOCSETN: 702#endif 703 case TIOCSETD: 704 case TIOCSETA: 705 case TIOCSETAW: 706 case TIOCSETAF: 707 /* 708 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 709 * ttywflush(tp) will hang if there are characters in 710 * the outq. 711 */ 712 ndflush(&tp->t_outq, tp->t_outq.c_cc); 713 break; 714 715 case TIOCSIG: 716 if (*(unsigned int *)data >= NSIG || 717 *(unsigned int *)data == 0) 718 return(EINVAL); 719 if ((tp->t_lflag&NOFLSH) == 0) 720 ttyflush(tp, FREAD|FWRITE); 721 if (tp->t_pgrp != NULL) { 722 PGRP_LOCK(tp->t_pgrp); 723 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 724 PGRP_UNLOCK(tp->t_pgrp); 725 } 726 if ((*(unsigned int *)data == SIGINFO) && 727 ((tp->t_lflag&NOKERNINFO) == 0)) 728 ttyinfo(tp); 729 return(0); 730 } 731 } 732 if (cmd == TIOCEXT) { 733 /* 734 * When the EXTPROC bit is being toggled, we need 735 * to send an TIOCPKT_IOCTL if the packet driver 736 * is turned on. 737 */ 738 if (*(int *)data) { 739 if (pti->pt_flags & PF_PKT) { 740 pti->pt_send |= TIOCPKT_IOCTL; 741 ptcwakeup(tp, FREAD); 742 } 743 tp->t_lflag |= EXTPROC; 744 } else { 745 if ((tp->t_lflag & EXTPROC) && 746 (pti->pt_flags & PF_PKT)) { 747 pti->pt_send |= TIOCPKT_IOCTL; 748 ptcwakeup(tp, FREAD); 749 } 750 tp->t_lflag &= ~EXTPROC; 751 } 752 return(0); 753 } 754 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td); 755 if (error == ENOIOCTL) 756 error = ttioctl(tp, cmd, data, flag); 757 if (error == ENOIOCTL) { 758 if (pti->pt_flags & PF_UCNTL && 759 (cmd & ~0xff) == UIOCCMD(0)) { 760 if (cmd & 0xff) { 761 pti->pt_ucntl = (u_char)cmd; 762 ptcwakeup(tp, FREAD); 763 } 764 return (0); 765 } 766 error = ENOTTY; 767 } 768 /* 769 * If external processing and packet mode send ioctl packet. 770 */ 771 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 772 switch(cmd) { 773 case TIOCSETA: 774 case TIOCSETAW: 775 case TIOCSETAF: 776#ifdef COMPAT_43 777 case TIOCSETP: 778 case TIOCSETN: 779#endif 780#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 781 case TIOCSETC: 782 case TIOCSLTC: 783 case TIOCLBIS: 784 case TIOCLBIC: 785 case TIOCLSET: 786#endif 787 pti->pt_send |= TIOCPKT_IOCTL; 788 ptcwakeup(tp, FREAD); 789 default: 790 break; 791 } 792 } 793 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 794 && CCEQ(cc[VSTART], CTRL('q')); 795 if (pti->pt_flags & PF_NOSTOP) { 796 if (stop) { 797 pti->pt_send &= ~TIOCPKT_NOSTOP; 798 pti->pt_send |= TIOCPKT_DOSTOP; 799 pti->pt_flags &= ~PF_NOSTOP; 800 ptcwakeup(tp, FREAD); 801 } 802 } else { 803 if (!stop) { 804 pti->pt_send &= ~TIOCPKT_DOSTOP; 805 pti->pt_send |= TIOCPKT_NOSTOP; 806 pti->pt_flags |= PF_NOSTOP; 807 ptcwakeup(tp, FREAD); 808 } 809 } 810 return (error); 811} 812 813 814static void ptc_drvinit(void *unused); 815 816static void pty_clone(void *arg, char *name, int namelen, dev_t *dev); 817 818static void 819pty_clone(arg, name, namelen, dev) 820 void *arg; 821 char *name; 822 int namelen; 823 dev_t *dev; 824{ 825 int u; 826 827 if (*dev != NODEV) 828 return; 829 if (bcmp(name, "pty", 3) != 0) 830 return; 831 if (name[5] != '\0') 832 return; 833 switch (name[3]) { 834 case 'p': u = 0; break; 835 case 'q': u = 32; break; 836 case 'r': u = 64; break; 837 case 's': u = 96; break; 838 case 'P': u = 128; break; 839 case 'Q': u = 160; break; 840 case 'R': u = 192; break; 841 case 'S': u = 224; break; 842 default: return; 843 } 844 if (name[4] >= '0' && name[4] <= '9') 845 u += name[4] - '0'; 846 else if (name[4] >= 'a' && name[4] <= 'v') 847 u += name[4] - 'a' + 10; 848 else 849 return; 850 *dev = make_dev(&ptc_cdevsw, u, 851 UID_ROOT, GID_WHEEL, 0666, "pty%c%r", names[u / 32], u % 32); 852 (*dev)->si_flags |= SI_CHEAPCLONE; 853 return; 854} 855 856static void 857ptc_drvinit(unused) 858 void *unused; 859{ 860 861 EVENTHANDLER_REGISTER(dev_clone, pty_clone, 0, 1000); 862} 863 864SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
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