pty.c revision 12819
1/* 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)tty_pty.c 8.2 (Berkeley) 9/23/93 34 * $Id: tty_pty.c,v 1.32 1995/12/13 15:13:15 julian Exp $ 35 */ 36 37/* 38 * Pseudo-teletype Driver 39 * (Actually two drivers, requiring two entries in 'cdevsw') 40 */ 41#include "pty.h" /* XXX */ 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#include <sys/ioctl.h> 46#include <sys/proc.h> 47#include <sys/tty.h> 48#include <sys/conf.h> 49#include <sys/file.h> 50#include <sys/uio.h> 51#include <sys/kernel.h> 52#include <sys/vnode.h> 53#include <sys/signalvar.h> 54 55#ifdef DEVFS 56#include <sys/devfsext.h> 57#endif /*DEVFS*/ 58 59static void ptyattach __P((int n)); 60static void ptsstart __P((struct tty *tp)); 61static void ptcwakeup __P((struct tty *tp, int flag)); 62 63static d_open_t ptsopen; 64static d_close_t ptsclose; 65static d_read_t ptsread; 66static d_write_t ptswrite; 67static d_ioctl_t ptyioctl; 68static d_stop_t ptsstop; 69static d_devtotty_t ptydevtotty; 70static d_open_t ptcopen; 71static d_close_t ptcclose; 72static d_read_t ptcread; 73static d_write_t ptcwrite; 74static d_ioctl_t ptcioctl; 75static d_select_t ptcselect; 76 77#define CDEV_MAJOR_S 5 78#define CDEV_MAJOR_C 6 79static struct cdevsw pts_cdevsw = 80 { ptsopen, ptsclose, ptsread, ptswrite, /*5*/ 81 ptyioctl, ptsstop, nullreset, ptydevtotty,/* ttyp */ 82 ttselect, nommap, NULL, "pts", NULL, -1 }; 83 84static struct cdevsw ptc_cdevsw = 85 { ptcopen, ptcclose, ptcread, ptcwrite, /*6*/ 86 ptyioctl, nullstop, nullreset, ptydevtotty,/* ptyp */ 87 ptcselect, nommap, NULL, "ptc", NULL, -1 }; 88 89 90#if NPTY == 1 91#undef NPTY 92#define NPTY 32 /* crude XXX */ 93#endif 94 95#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 96 97/* 98 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 99 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 100 */ 101static struct tty pt_tty[NPTY]; /* XXX */ 102static struct pt_ioctl { 103 int pt_flags; 104 struct selinfo pt_selr, pt_selw; 105 u_char pt_send; 106 u_char pt_ucntl; 107} pt_ioctl[NPTY]; /* XXX */ 108static int npty = NPTY; /* for pstat -t */ 109 110#define PF_PKT 0x08 /* packet mode */ 111#define PF_STOPPED 0x10 /* user told stopped */ 112#define PF_REMOTE 0x20 /* remote and flow controlled input */ 113#define PF_NOSTOP 0x40 114#define PF_UCNTL 0x80 /* user control mode */ 115 116/* 117 * Establish n (or default if n is 1) ptys in the system. 118 * 119 * XXX cdevsw & pstat require the array `pty[]' to be an array 120 */ 121static void 122ptyattach(n) 123 int n; 124{ 125#ifdef notyet 126 char *mem; 127 register u_long ntb; 128#define DEFAULT_NPTY 32 129 130 /* maybe should allow 0 => none? */ 131 if (n <= 1) 132 n = DEFAULT_NPTY; 133 ntb = n * sizeof(struct tty); 134 mem = malloc(ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl), 135 M_DEVBUF, M_WAITOK); 136 pt_tty = (struct tty *)mem; 137 mem = (char *)ALIGN(mem + ntb); 138 pt_ioctl = (struct pt_ioctl *)mem; 139 npty = n; 140#endif 141} 142 143/*ARGSUSED*/ 144static int 145ptsopen(dev, flag, devtype, p) 146 dev_t dev; 147 int flag, devtype; 148 struct proc *p; 149{ 150 register struct tty *tp; 151 int error; 152 153 if (minor(dev) >= npty) 154 return (ENXIO); 155 tp = &pt_tty[minor(dev)]; 156 if ((tp->t_state & TS_ISOPEN) == 0) { 157 ttychars(tp); /* Set up default chars */ 158 tp->t_iflag = TTYDEF_IFLAG; 159 tp->t_oflag = TTYDEF_OFLAG; 160 tp->t_lflag = TTYDEF_LFLAG; 161 tp->t_cflag = TTYDEF_CFLAG; 162 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 163 ttsetwater(tp); /* would be done in xxparam() */ 164 } else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0) 165 return (EBUSY); 166 if (tp->t_oproc) /* Ctrlr still around. */ 167 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 168 while ((tp->t_state & TS_CARR_ON) == 0) { 169 if (flag&FNONBLOCK) 170 break; 171 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 172 "ptsopn", 0); 173 if (error) 174 return (error); 175 } 176 error = (*linesw[tp->t_line].l_open)(dev, tp); 177 if (error == 0) 178 ptcwakeup(tp, FREAD|FWRITE); 179 return (error); 180} 181 182static int 183ptsclose(dev, flag, mode, p) 184 dev_t dev; 185 int flag, mode; 186 struct proc *p; 187{ 188 register struct tty *tp; 189 int err; 190 191 tp = &pt_tty[minor(dev)]; 192 err = (*linesw[tp->t_line].l_close)(tp, flag); 193 ptsstop(tp, FREAD|FWRITE); 194 (void) ttyclose(tp); 195 return (err); 196} 197 198static int 199ptsread(dev, uio, flag) 200 dev_t dev; 201 struct uio *uio; 202 int flag; 203{ 204 struct proc *p = curproc; 205 register struct tty *tp = &pt_tty[minor(dev)]; 206 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 207 int error = 0; 208 209again: 210 if (pti->pt_flags & PF_REMOTE) { 211 while (isbackground(p, tp)) { 212 if ((p->p_sigignore & sigmask(SIGTTIN)) || 213 (p->p_sigmask & sigmask(SIGTTIN)) || 214 p->p_pgrp->pg_jobc == 0 || 215 p->p_flag & P_PPWAIT) 216 return (EIO); 217 pgsignal(p->p_pgrp, SIGTTIN, 1); 218 error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 219 0); 220 if (error) 221 return (error); 222 } 223 if (tp->t_canq.c_cc == 0) { 224 if (flag & IO_NDELAY) 225 return (EWOULDBLOCK); 226 error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 227 "ptsin", 0); 228 if (error) 229 return (error); 230 goto again; 231 } 232 while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 233 if (ureadc(getc(&tp->t_canq), uio) < 0) { 234 error = EFAULT; 235 break; 236 } 237 if (tp->t_canq.c_cc == 1) 238 (void) getc(&tp->t_canq); 239 if (tp->t_canq.c_cc) 240 return (error); 241 } else 242 if (tp->t_oproc) 243 error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 244 ptcwakeup(tp, FWRITE); 245 return (error); 246} 247 248/* 249 * Write to pseudo-tty. 250 * Wakeups of controlling tty will happen 251 * indirectly, when tty driver calls ptsstart. 252 */ 253static int 254ptswrite(dev, uio, flag) 255 dev_t dev; 256 struct uio *uio; 257 int flag; 258{ 259 register struct tty *tp; 260 261 tp = &pt_tty[minor(dev)]; 262 if (tp->t_oproc == 0) 263 return (EIO); 264 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 265} 266 267/* 268 * Start output on pseudo-tty. 269 * Wake up process selecting or sleeping for input from controlling tty. 270 */ 271static void 272ptsstart(tp) 273 struct tty *tp; 274{ 275 register struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 276 277 if (tp->t_state & TS_TTSTOP) 278 return; 279 if (pti->pt_flags & PF_STOPPED) { 280 pti->pt_flags &= ~PF_STOPPED; 281 pti->pt_send = TIOCPKT_START; 282 } 283 ptcwakeup(tp, FREAD); 284} 285 286static void 287ptcwakeup(tp, flag) 288 struct tty *tp; 289 int flag; 290{ 291 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 292 293 if (flag & FREAD) { 294 selwakeup(&pti->pt_selr); 295 wakeup(TSA_PTC_READ(tp)); 296 } 297 if (flag & FWRITE) { 298 selwakeup(&pti->pt_selw); 299 wakeup(TSA_PTC_WRITE(tp)); 300 } 301} 302 303static int 304ptcopen(dev, flag, devtype, p) 305 dev_t dev; 306 int flag, devtype; 307 struct proc *p; 308{ 309 register struct tty *tp; 310 struct pt_ioctl *pti; 311 312 if (minor(dev) >= npty) 313 return (ENXIO); 314 tp = &pt_tty[minor(dev)]; 315 if (tp->t_oproc) 316 return (EIO); 317 tp->t_oproc = ptsstart; 318#ifdef sun4c 319 tp->t_stop = ptsstop; 320#endif 321 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 322 tp->t_lflag &= ~EXTPROC; 323 pti = &pt_ioctl[minor(dev)]; 324 pti->pt_flags = 0; 325 pti->pt_send = 0; 326 pti->pt_ucntl = 0; 327 return (0); 328} 329 330static int 331ptcclose(dev, flags, fmt, p) 332 dev_t dev; 333 int flags; 334 int fmt; 335 struct proc *p; 336{ 337 register struct tty *tp; 338 339 tp = &pt_tty[minor(dev)]; 340 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 341 342 /* 343 * XXX MDMBUF makes no sense for ptys but would inhibit the above 344 * l_modem(). CLOCAL makes sense but isn't supported. Special 345 * l_modem()s that ignore carrier drop make no sense for ptys but 346 * may be in use because other parts of the line discipline make 347 * sense for ptys. Recover by doing everything that a normal 348 * ttymodem() would have done except for sending a SIGHUP. 349 */ 350 if (tp->t_state & TS_ISOPEN) { 351 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 352 tp->t_state |= TS_ZOMBIE; 353 ttyflush(tp, FREAD | FWRITE); 354 } 355 356 tp->t_oproc = 0; /* mark closed */ 357 return (0); 358} 359 360static int 361ptcread(dev, uio, flag) 362 dev_t dev; 363 struct uio *uio; 364 int flag; 365{ 366 register struct tty *tp = &pt_tty[minor(dev)]; 367 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 368 char buf[BUFSIZ]; 369 int error = 0, cc; 370 371 /* 372 * We want to block until the slave 373 * is open, and there's something to read; 374 * but if we lost the slave or we're NBIO, 375 * then return the appropriate error instead. 376 */ 377 for (;;) { 378 if (tp->t_state&TS_ISOPEN) { 379 if (pti->pt_flags&PF_PKT && pti->pt_send) { 380 error = ureadc((int)pti->pt_send, uio); 381 if (error) 382 return (error); 383 if (pti->pt_send & TIOCPKT_IOCTL) { 384 cc = min(uio->uio_resid, 385 sizeof(tp->t_termios)); 386 uiomove((caddr_t)&tp->t_termios, cc, 387 uio); 388 } 389 pti->pt_send = 0; 390 return (0); 391 } 392 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 393 error = ureadc((int)pti->pt_ucntl, uio); 394 if (error) 395 return (error); 396 pti->pt_ucntl = 0; 397 return (0); 398 } 399 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 400 break; 401 } 402 if ((tp->t_state & TS_CONNECTED) == 0) 403 return (0); /* EOF */ 404 if (flag & IO_NDELAY) 405 return (EWOULDBLOCK); 406 error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 407 if (error) 408 return (error); 409 } 410 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 411 error = ureadc(0, uio); 412 while (uio->uio_resid > 0 && error == 0) { 413 cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 414 if (cc <= 0) 415 break; 416 error = uiomove(buf, cc, uio); 417 } 418 ttwwakeup(tp); 419 return (error); 420} 421 422static void 423ptsstop(tp, flush) 424 register struct tty *tp; 425 int flush; 426{ 427 struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 428 int flag; 429 430 /* note: FLUSHREAD and FLUSHWRITE already ok */ 431 if (flush == 0) { 432 flush = TIOCPKT_STOP; 433 pti->pt_flags |= PF_STOPPED; 434 } else 435 pti->pt_flags &= ~PF_STOPPED; 436 pti->pt_send |= flush; 437 /* change of perspective */ 438 flag = 0; 439 if (flush & FREAD) 440 flag |= FWRITE; 441 if (flush & FWRITE) 442 flag |= FREAD; 443 ptcwakeup(tp, flag); 444} 445 446static int 447ptcselect(dev, rw, p) 448 dev_t dev; 449 int rw; 450 struct proc *p; 451{ 452 register struct tty *tp = &pt_tty[minor(dev)]; 453 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 454 int s; 455 456 if ((tp->t_state & TS_CONNECTED) == 0) 457 return (1); 458 switch (rw) { 459 460 case FREAD: 461 /* 462 * Need to block timeouts (ttrstart). 463 */ 464 s = spltty(); 465 if ((tp->t_state&TS_ISOPEN) && 466 tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) { 467 splx(s); 468 return (1); 469 } 470 splx(s); 471 /* FALLTHROUGH */ 472 473 case 0: /* exceptional */ 474 if ((tp->t_state&TS_ISOPEN) && 475 ((pti->pt_flags&PF_PKT && pti->pt_send) || 476 (pti->pt_flags&PF_UCNTL && pti->pt_ucntl))) 477 return (1); 478 selrecord(p, &pti->pt_selr); 479 break; 480 481 482 case FWRITE: 483 if (tp->t_state&TS_ISOPEN) { 484 if (pti->pt_flags & PF_REMOTE) { 485 if (tp->t_canq.c_cc == 0) 486 return (1); 487 } else { 488 if (tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG-2) 489 return (1); 490 if (tp->t_canq.c_cc == 0 && (tp->t_iflag&ICANON)) 491 return (1); 492 } 493 } 494 selrecord(p, &pti->pt_selw); 495 break; 496 497 } 498 return (0); 499} 500 501static int 502ptcwrite(dev, uio, flag) 503 dev_t dev; 504 register struct uio *uio; 505 int flag; 506{ 507 register struct tty *tp = &pt_tty[minor(dev)]; 508 register u_char *cp = 0; 509 register int cc = 0; 510 u_char locbuf[BUFSIZ]; 511 int cnt = 0; 512 struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 513 int error = 0; 514 515again: 516 if ((tp->t_state&TS_ISOPEN) == 0) 517 goto block; 518 if (pti->pt_flags & PF_REMOTE) { 519 if (tp->t_canq.c_cc) 520 goto block; 521 while ((uio->uio_resid > 0 || cc > 0) && 522 tp->t_canq.c_cc < TTYHOG - 1) { 523 if (cc == 0) { 524 cc = min(uio->uio_resid, BUFSIZ); 525 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 526 cp = locbuf; 527 error = uiomove((caddr_t)cp, cc, uio); 528 if (error) 529 return (error); 530 /* check again for safety */ 531 if ((tp->t_state & TS_ISOPEN) == 0) { 532 /* adjust as usual */ 533 uio->uio_resid += cc; 534 return (EIO); 535 } 536 } 537 if (cc) 538 cc -= b_to_q((char *)cp, cc, &tp->t_canq); 539 } 540 /* adjust for data copied in but not written */ 541 uio->uio_resid += cc; 542 (void) putc(0, &tp->t_canq); 543 ttwakeup(tp); 544 wakeup(TSA_PTS_READ(tp)); 545 return (0); 546 } 547 while (uio->uio_resid > 0 || cc > 0) { 548 if (cc == 0) { 549 cc = min(uio->uio_resid, BUFSIZ); 550 cp = locbuf; 551 error = uiomove((caddr_t)cp, cc, uio); 552 if (error) 553 return (error); 554 /* check again for safety */ 555 if ((tp->t_state & TS_ISOPEN) == 0) { 556 /* adjust for data copied in but not written */ 557 uio->uio_resid += cc; 558 return (EIO); 559 } 560 } 561 while (cc > 0) { 562 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 563 (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) { 564 wakeup(TSA_HUP_OR_INPUT(tp)); 565 goto block; 566 } 567 (*linesw[tp->t_line].l_rint)(*cp++, tp); 568 cnt++; 569 cc--; 570 } 571 cc = 0; 572 } 573 return (0); 574block: 575 /* 576 * Come here to wait for slave to open, for space 577 * in outq, or space in rawq. 578 */ 579 if ((tp->t_state & TS_CONNECTED) == 0) { 580 /* adjust for data copied in but not written */ 581 uio->uio_resid += cc; 582 return (EIO); 583 } 584 if (flag & IO_NDELAY) { 585 /* adjust for data copied in but not written */ 586 uio->uio_resid += cc; 587 if (cnt == 0) 588 return (EWOULDBLOCK); 589 return (0); 590 } 591 error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 592 if (error) { 593 /* adjust for data copied in but not written */ 594 uio->uio_resid += cc; 595 return (error); 596 } 597 goto again; 598} 599 600static struct tty * 601ptydevtotty(dev) 602 dev_t dev; 603{ 604 if (minor(dev) >= npty) 605 return (NULL); 606 607 return &pt_tty[minor(dev)]; 608} 609 610/*ARGSUSED*/ 611static int 612ptyioctl(dev, cmd, data, flag, p) 613 dev_t dev; 614 int cmd; 615 caddr_t data; 616 int flag; 617 struct proc *p; 618{ 619 register struct tty *tp = &pt_tty[minor(dev)]; 620 register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 621 register u_char *cc = tp->t_cc; 622 int stop, error; 623 624 /* 625 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 626 * ttywflush(tp) will hang if there are characters in the outq. 627 */ 628 if (cmd == TIOCEXT) { 629 /* 630 * When the EXTPROC bit is being toggled, we need 631 * to send an TIOCPKT_IOCTL if the packet driver 632 * is turned on. 633 */ 634 if (*(int *)data) { 635 if (pti->pt_flags & PF_PKT) { 636 pti->pt_send |= TIOCPKT_IOCTL; 637 ptcwakeup(tp, FREAD); 638 } 639 tp->t_lflag |= EXTPROC; 640 } else { 641 if ((tp->t_state & EXTPROC) && 642 (pti->pt_flags & PF_PKT)) { 643 pti->pt_send |= TIOCPKT_IOCTL; 644 ptcwakeup(tp, FREAD); 645 } 646 tp->t_lflag &= ~EXTPROC; 647 } 648 return(0); 649 } else 650 if (cdevsw[major(dev)]->d_open == ptcopen) 651 switch (cmd) { 652 653 case TIOCGPGRP: 654 /* 655 * We aviod calling ttioctl on the controller since, 656 * in that case, tp must be the controlling terminal. 657 */ 658 *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 659 return (0); 660 661 case TIOCPKT: 662 if (*(int *)data) { 663 if (pti->pt_flags & PF_UCNTL) 664 return (EINVAL); 665 pti->pt_flags |= PF_PKT; 666 } else 667 pti->pt_flags &= ~PF_PKT; 668 return (0); 669 670 case TIOCUCNTL: 671 if (*(int *)data) { 672 if (pti->pt_flags & PF_PKT) 673 return (EINVAL); 674 pti->pt_flags |= PF_UCNTL; 675 } else 676 pti->pt_flags &= ~PF_UCNTL; 677 return (0); 678 679 case TIOCREMOTE: 680 if (*(int *)data) 681 pti->pt_flags |= PF_REMOTE; 682 else 683 pti->pt_flags &= ~PF_REMOTE; 684 ttyflush(tp, FREAD|FWRITE); 685 return (0); 686 687#ifdef COMPAT_43 688 case TIOCSETP: 689 case TIOCSETN: 690#endif 691 case TIOCSETD: 692 case TIOCSETA: 693 case TIOCSETAW: 694 case TIOCSETAF: 695 ndflush(&tp->t_outq, tp->t_outq.c_cc); 696 break; 697 698 case TIOCSIG: 699 if (*(unsigned int *)data >= NSIG) 700 return(EINVAL); 701 if ((tp->t_lflag&NOFLSH) == 0) 702 ttyflush(tp, FREAD|FWRITE); 703 pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 704 if ((*(unsigned int *)data == SIGINFO) && 705 ((tp->t_lflag&NOKERNINFO) == 0)) 706 ttyinfo(tp); 707 return(0); 708 } 709 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 710 if (error < 0) 711 error = ttioctl(tp, cmd, data, flag); 712 if (error < 0) { 713 if (pti->pt_flags & PF_UCNTL && 714 (cmd & ~0xff) == UIOCCMD(0)) { 715 if (cmd & 0xff) { 716 pti->pt_ucntl = (u_char)cmd; 717 ptcwakeup(tp, FREAD); 718 } 719 return (0); 720 } 721 error = ENOTTY; 722 } 723 /* 724 * If external processing and packet mode send ioctl packet. 725 */ 726 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 727 switch(cmd) { 728 case TIOCSETA: 729 case TIOCSETAW: 730 case TIOCSETAF: 731#ifdef COMPAT_43 732 case TIOCSETP: 733 case TIOCSETN: 734#endif 735#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 736 case TIOCSETC: 737 case TIOCSLTC: 738 case TIOCLBIS: 739 case TIOCLBIC: 740 case TIOCLSET: 741#endif 742 pti->pt_send |= TIOCPKT_IOCTL; 743 ptcwakeup(tp, FREAD); 744 default: 745 break; 746 } 747 } 748 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 749 && CCEQ(cc[VSTART], CTRL('q')); 750 if (pti->pt_flags & PF_NOSTOP) { 751 if (stop) { 752 pti->pt_send &= ~TIOCPKT_NOSTOP; 753 pti->pt_send |= TIOCPKT_DOSTOP; 754 pti->pt_flags &= ~PF_NOSTOP; 755 ptcwakeup(tp, FREAD); 756 } 757 } else { 758 if (!stop) { 759 pti->pt_send &= ~TIOCPKT_DOSTOP; 760 pti->pt_send |= TIOCPKT_NOSTOP; 761 pti->pt_flags |= PF_NOSTOP; 762 ptcwakeup(tp, FREAD); 763 } 764 } 765 return (error); 766} 767 768static ptc_devsw_installed = 0; 769#ifdef DEVFS 770#define MAXUNITS (8 * 32) 771static void *devfs_token_pts[MAXUNITS]; 772static void *devfs_token_ptc[MAXUNITS]; 773static const char jnames[] = "pqrsPQRS"; 774static const char knames[] = "0123456789abcdefghijklmnopqrstuv"; 775#endif 776 777static void 778ptc_drvinit(void *unused) 779{ 780#ifdef DEVFS 781 int i,j,k; 782 char name[16]; 783#endif 784 dev_t dev; 785 786 if( ! ptc_devsw_installed ) { 787 dev = makedev(CDEV_MAJOR_S, 0); 788 cdevsw_add(&dev, &pts_cdevsw, NULL); 789 dev = makedev(CDEV_MAJOR_C, 0); 790 cdevsw_add(&dev, &ptc_cdevsw, NULL); 791 ptc_devsw_installed = 1; 792#ifdef DEVFS 793/*XXX*/ 794#if NPTY > MAXUNITS 795#undef NPTY 796#define NPTY MAXUNITS 797#endif 798 for ( i = 0 ; i<NPTY ; i++ ) { 799 void *x; 800 801 j = i / 32; 802 k = i % 32; 803 sprintf(name,"pty%c%c",jnames[j],knames[k]); 804 devfs_token_pts[i] = 805 devfs_add_devsw("/",name,&pts_cdevsw,i, 806 DV_CHR,0,0,0600); 807 sprintf(name,"tty%c%c",jnames[j],knames[k]); 808 devfs_token_ptc[i] = 809 devfs_add_devsw("/",name,&ptc_cdevsw,i, 810 DV_CHR,0,0,0600); 811 } 812#endif 813 } 814} 815 816SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL) 817 818 819