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 8.4 (Berkeley) 2/20/95 34 * $FreeBSD: src/sys/kern/tty_pty.c,v 1.74.2.4 2002/02/20 19:58:13 dillon Exp $ 35 * $DragonFly: src/sys/kern/tty_pty.c,v 1.14 2006/07/28 02:17:40 dillon Exp $ 36 */ 37 38 /* 39 * Pseudo-teletype Driver 40 * (Actually two drivers, requiring two dev_ops structures) 41 */ 42 #include "use_pty.h" /* XXX */ 43 #include "opt_compat.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #if defined(COMPAT_43) || defined(COMPAT_SUNOS) 48 #include <sys/ioctl_compat.h> 49 #endif 50 #include <sys/proc.h> 51 #include <sys/tty.h> 52 #include <sys/conf.h> 53 #include <sys/fcntl.h> 54 #include <sys/poll.h> 55 #include <sys/kernel.h> 56 #include <sys/vnode.h> 57 #include <sys/signalvar.h> 58 #include <sys/malloc.h> 59 #include <sys/device.h> 60 #include <sys/thread2.h> 61 62 MALLOC_DEFINE(M_PTY, "ptys", "pty data structures"); 63 64 static void ptsstart (struct tty *tp); 65 static void ptsstop (struct tty *tp, int rw); 66 static void ptcwakeup (struct tty *tp, int flag); 67 static void ptyinit (int n); 68 69 static d_open_t ptsopen; 70 static d_close_t ptsclose; 71 static d_read_t ptsread; 72 static d_write_t ptswrite; 73 static d_ioctl_t ptyioctl; 74 static d_open_t ptcopen; 75 static d_close_t ptcclose; 76 static d_read_t ptcread; 77 static d_write_t ptcwrite; 78 static d_poll_t ptcpoll; 79 80 #define CDEV_MAJOR_S 5 81 static struct dev_ops pts_ops = { 82 { "pts", CDEV_MAJOR_S, D_TTY | D_KQFILTER }, 83 .d_open = ptsopen, 84 .d_close = ptsclose, 85 .d_read = ptsread, 86 .d_write = ptswrite, 87 .d_ioctl = ptyioctl, 88 .d_poll = ttypoll, 89 .d_kqfilter = ttykqfilter 90 }; 91 92 #define CDEV_MAJOR_C 6 93 static struct dev_ops ptc_ops = { 94 { "ptc", CDEV_MAJOR_C, D_TTY | D_KQFILTER | D_MASTER }, 95 .d_open = ptcopen, 96 .d_close = ptcclose, 97 .d_read = ptcread, 98 .d_write = ptcwrite, 99 .d_ioctl = ptyioctl, 100 .d_poll = ptcpoll, 101 .d_kqfilter = ttykqfilter 102 }; 103 104 #define BUFSIZ 100 /* Chunk size iomoved to/from user */ 105 106 struct pt_ioctl { 107 int pt_flags; 108 struct selinfo pt_selr, pt_selw; 109 u_char pt_send; 110 u_char pt_ucntl; 111 struct tty pt_tty; 112 dev_t devs, devc; 113 struct prison *pt_prison; 114 }; 115 116 #define PF_PKT 0x08 /* packet mode */ 117 #define PF_STOPPED 0x10 /* user told stopped */ 118 #define PF_REMOTE 0x20 /* remote and flow controlled input */ 119 #define PF_NOSTOP 0x40 120 #define PF_UCNTL 0x80 /* user control mode */ 121 122 /* 123 * This function creates and initializes a pts/ptc pair 124 * 125 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 126 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 127 * 128 * XXX: define and add mapping of upper minor bits to allow more 129 * than 256 ptys. 130 */ 131 static void 132 ptyinit(n) 133 int n; 134 { 135 dev_t devs, devc; 136 char *names = "pqrsPQRS"; 137 struct pt_ioctl *pt; 138 139 /* For now we only map the lower 8 bits of the minor */ 140 if (n & ~0xff) 141 return; 142 143 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK); 144 bzero(pt, sizeof(*pt)); 145 pt->devs = devs = make_dev(&pts_ops, n, 146 0, 0, 0666, "tty%c%r", names[n / 32], n % 32); 147 pt->devc = devc = make_dev(&ptc_ops, n, 148 0, 0, 0666, "pty%c%r", names[n / 32], n % 32); 149 150 devs->si_drv1 = devc->si_drv1 = pt; 151 devs->si_tty = devc->si_tty = &pt->pt_tty; 152 pt->pt_tty.t_dev = devs; 153 ttyregister(&pt->pt_tty); 154 } 155 156 /*ARGSUSED*/ 157 static int 158 ptsopen(struct dev_open_args *ap) 159 { 160 dev_t dev = ap->a_head.a_dev; 161 struct tty *tp; 162 int error; 163 int minr; 164 #if 0 165 dev_t nextdev; 166 #endif 167 struct pt_ioctl *pti; 168 169 minr = lminor(dev); 170 #if 0 171 /* 172 * REMOVED gross hack for devfs. also note that makedev() 173 * no longer exists in this form and reference counting makes 174 * this a problem if we don't clean it out later. 175 */ 176 if (minr < 255) { 177 nextdev = make_sub_dev(dev, minr + 1); 178 if (!nextdev->si_drv1) { 179 ptyinit(minr + 1); 180 } 181 } 182 #endif 183 if (!dev->si_drv1) 184 ptyinit(minor(dev)); 185 if (!dev->si_drv1) 186 return(ENXIO); 187 pti = dev->si_drv1; 188 tp = dev->si_tty; 189 if ((tp->t_state & TS_ISOPEN) == 0) { 190 ttychars(tp); /* Set up default chars */ 191 tp->t_iflag = TTYDEF_IFLAG; 192 tp->t_oflag = TTYDEF_OFLAG; 193 tp->t_lflag = TTYDEF_LFLAG; 194 tp->t_cflag = TTYDEF_CFLAG; 195 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 196 } else if ((tp->t_state & TS_XCLUDE) && suser_cred(ap->a_cred, 0)) { 197 return (EBUSY); 198 } else if (pti->pt_prison != ap->a_cred->cr_prison) { 199 return (EBUSY); 200 } 201 if (tp->t_oproc) /* Ctrlr still around. */ 202 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 203 while ((tp->t_state & TS_CARR_ON) == 0) { 204 if (ap->a_oflags & FNONBLOCK) 205 break; 206 error = ttysleep(tp, TSA_CARR_ON(tp), PCATCH, "ptsopn", 0); 207 if (error) 208 return (error); 209 } 210 error = (*linesw[tp->t_line].l_open)(dev, tp); 211 if (error == 0) 212 ptcwakeup(tp, FREAD|FWRITE); 213 return (error); 214 } 215 216 static int 217 ptsclose(struct dev_close_args *ap) 218 { 219 dev_t dev = ap->a_head.a_dev; 220 struct tty *tp; 221 int err; 222 223 tp = dev->si_tty; 224 err = (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 225 ptsstop(tp, FREAD|FWRITE); 226 (void) ttyclose(tp); 227 return (err); 228 } 229 230 static int 231 ptsread(struct dev_read_args *ap) 232 { 233 dev_t dev = ap->a_head.a_dev; 234 struct proc *p = curproc; 235 struct tty *tp = dev->si_tty; 236 struct pt_ioctl *pti = dev->si_drv1; 237 int error = 0; 238 239 again: 240 if (pti->pt_flags & PF_REMOTE) { 241 while (isbackground(p, tp)) { 242 if (SIGISMEMBER(p->p_sigignore, SIGTTIN) || 243 SIGISMEMBER(p->p_sigmask, SIGTTIN) || 244 p->p_pgrp->pg_jobc == 0 || p->p_flag & P_PPWAIT) 245 return (EIO); 246 pgsignal(p->p_pgrp, SIGTTIN, 1); 247 error = ttysleep(tp, &lbolt, PCATCH, "ptsbg", 0); 248 if (error) 249 return (error); 250 } 251 if (tp->t_canq.c_cc == 0) { 252 if (ap->a_ioflag & IO_NDELAY) 253 return (EWOULDBLOCK); 254 error = ttysleep(tp, TSA_PTS_READ(tp), PCATCH, 255 "ptsin", 0); 256 if (error) 257 return (error); 258 goto again; 259 } 260 while (tp->t_canq.c_cc > 1 && ap->a_uio->uio_resid > 0) 261 if (ureadc(getc(&tp->t_canq), ap->a_uio) < 0) { 262 error = EFAULT; 263 break; 264 } 265 if (tp->t_canq.c_cc == 1) 266 (void) getc(&tp->t_canq); 267 if (tp->t_canq.c_cc) 268 return (error); 269 } else 270 if (tp->t_oproc) 271 error = (*linesw[tp->t_line].l_read)(tp, ap->a_uio, ap->a_ioflag); 272 ptcwakeup(tp, FWRITE); 273 return (error); 274 } 275 276 /* 277 * Write to pseudo-tty. 278 * Wakeups of controlling tty will happen 279 * indirectly, when tty driver calls ptsstart. 280 */ 281 static int 282 ptswrite(struct dev_write_args *ap) 283 { 284 dev_t dev = ap->a_head.a_dev; 285 struct tty *tp; 286 287 tp = dev->si_tty; 288 if (tp->t_oproc == 0) 289 return (EIO); 290 return ((*linesw[tp->t_line].l_write)(tp, ap->a_uio, ap->a_ioflag)); 291 } 292 293 /* 294 * Start output on pseudo-tty. 295 * Wake up process selecting or sleeping for input from controlling tty. 296 */ 297 static void 298 ptsstart(tp) 299 struct tty *tp; 300 { 301 struct pt_ioctl *pti = tp->t_dev->si_drv1; 302 303 if (tp->t_state & TS_TTSTOP) 304 return; 305 if (pti->pt_flags & PF_STOPPED) { 306 pti->pt_flags &= ~PF_STOPPED; 307 pti->pt_send = TIOCPKT_START; 308 } 309 ptcwakeup(tp, FREAD); 310 } 311 312 static void 313 ptcwakeup(tp, flag) 314 struct tty *tp; 315 int flag; 316 { 317 struct pt_ioctl *pti = tp->t_dev->si_drv1; 318 319 if (flag & FREAD) { 320 selwakeup(&pti->pt_selr); 321 wakeup(TSA_PTC_READ(tp)); 322 } 323 if (flag & FWRITE) { 324 selwakeup(&pti->pt_selw); 325 wakeup(TSA_PTC_WRITE(tp)); 326 } 327 } 328 329 static int 330 ptcopen(struct dev_open_args *ap) 331 { 332 dev_t dev = ap->a_head.a_dev; 333 struct tty *tp; 334 struct pt_ioctl *pti; 335 336 if (!dev->si_drv1) 337 ptyinit(minor(dev)); 338 if (!dev->si_drv1) 339 return(ENXIO); 340 tp = dev->si_tty; 341 if (tp->t_oproc) 342 return (EIO); 343 tp->t_oproc = ptsstart; 344 tp->t_stop = ptsstop; 345 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 346 tp->t_lflag &= ~EXTPROC; 347 pti = dev->si_drv1; 348 pti->pt_prison = ap->a_cred->cr_prison; 349 pti->pt_flags = 0; 350 pti->pt_send = 0; 351 pti->pt_ucntl = 0; 352 return (0); 353 } 354 355 static int 356 ptcclose(struct dev_close_args *ap) 357 { 358 dev_t dev = ap->a_head.a_dev; 359 struct tty *tp; 360 361 tp = dev->si_tty; 362 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 363 364 /* 365 * XXX MDMBUF makes no sense for ptys but would inhibit the above 366 * l_modem(). CLOCAL makes sense but isn't supported. Special 367 * l_modem()s that ignore carrier drop make no sense for ptys but 368 * may be in use because other parts of the line discipline make 369 * sense for ptys. Recover by doing everything that a normal 370 * ttymodem() would have done except for sending a SIGHUP. 371 */ 372 if (tp->t_state & TS_ISOPEN) { 373 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 374 tp->t_state |= TS_ZOMBIE; 375 ttyflush(tp, FREAD | FWRITE); 376 } 377 378 tp->t_oproc = 0; /* mark closed */ 379 return (0); 380 } 381 382 static int 383 ptcread(struct dev_read_args *ap) 384 { 385 dev_t dev = ap->a_head.a_dev; 386 struct tty *tp = dev->si_tty; 387 struct pt_ioctl *pti = dev->si_drv1; 388 char buf[BUFSIZ]; 389 int error = 0, cc; 390 391 /* 392 * We want to block until the slave 393 * is open, and there's something to read; 394 * but if we lost the slave or we're NBIO, 395 * then return the appropriate error instead. 396 */ 397 for (;;) { 398 if (tp->t_state&TS_ISOPEN) { 399 if (pti->pt_flags&PF_PKT && pti->pt_send) { 400 error = ureadc((int)pti->pt_send, ap->a_uio); 401 if (error) 402 return (error); 403 if (pti->pt_send & TIOCPKT_IOCTL) { 404 cc = min(ap->a_uio->uio_resid, 405 sizeof(tp->t_termios)); 406 uiomove((caddr_t)&tp->t_termios, cc, 407 ap->a_uio); 408 } 409 pti->pt_send = 0; 410 return (0); 411 } 412 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 413 error = ureadc((int)pti->pt_ucntl, ap->a_uio); 414 if (error) 415 return (error); 416 pti->pt_ucntl = 0; 417 return (0); 418 } 419 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 420 break; 421 } 422 if ((tp->t_state & TS_CONNECTED) == 0) 423 return (0); /* EOF */ 424 if (ap->a_ioflag & IO_NDELAY) 425 return (EWOULDBLOCK); 426 error = tsleep(TSA_PTC_READ(tp), PCATCH, "ptcin", 0); 427 if (error) 428 return (error); 429 } 430 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 431 error = ureadc(0, ap->a_uio); 432 while (ap->a_uio->uio_resid > 0 && error == 0) { 433 cc = q_to_b(&tp->t_outq, buf, min(ap->a_uio->uio_resid, BUFSIZ)); 434 if (cc <= 0) 435 break; 436 error = uiomove(buf, cc, ap->a_uio); 437 } 438 ttwwakeup(tp); 439 return (error); 440 } 441 442 static void 443 ptsstop(tp, flush) 444 struct tty *tp; 445 int flush; 446 { 447 struct pt_ioctl *pti = tp->t_dev->si_drv1; 448 int flag; 449 450 /* note: FLUSHREAD and FLUSHWRITE already ok */ 451 if (flush == 0) { 452 flush = TIOCPKT_STOP; 453 pti->pt_flags |= PF_STOPPED; 454 } else 455 pti->pt_flags &= ~PF_STOPPED; 456 pti->pt_send |= flush; 457 /* change of perspective */ 458 flag = 0; 459 if (flush & FREAD) 460 flag |= FWRITE; 461 if (flush & FWRITE) 462 flag |= FREAD; 463 ptcwakeup(tp, flag); 464 } 465 466 static int 467 ptcpoll(struct dev_poll_args *ap) 468 { 469 dev_t dev = ap->a_head.a_dev; 470 struct tty *tp = dev->si_tty; 471 struct pt_ioctl *pti = dev->si_drv1; 472 int revents = 0; 473 474 if ((tp->t_state & TS_CONNECTED) == 0) { 475 ap->a_events = seltrue(dev, ap->a_events) | POLLHUP; 476 return(0); 477 } 478 479 /* 480 * Need to block timeouts (ttrstart). 481 */ 482 crit_enter(); 483 484 if (ap->a_events & (POLLIN | POLLRDNORM)) 485 if ((tp->t_state & TS_ISOPEN) && 486 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 487 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 488 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 489 revents |= ap->a_events & (POLLIN | POLLRDNORM); 490 491 if (ap->a_events & (POLLOUT | POLLWRNORM)) 492 if (tp->t_state & TS_ISOPEN && 493 ((pti->pt_flags & PF_REMOTE) ? 494 (tp->t_canq.c_cc == 0) : 495 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 496 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON))))) 497 revents |= ap->a_events & (POLLOUT | POLLWRNORM); 498 499 if (ap->a_events & POLLHUP) 500 if ((tp->t_state & TS_CARR_ON) == 0) 501 revents |= POLLHUP; 502 503 if (revents == 0) { 504 if (ap->a_events & (POLLIN | POLLRDNORM)) 505 selrecord(curthread, &pti->pt_selr); 506 507 if (ap->a_events & (POLLOUT | POLLWRNORM)) 508 selrecord(curthread, &pti->pt_selw); 509 } 510 crit_exit(); 511 512 ap->a_events = revents; 513 return (0); 514 } 515 516 static int 517 ptcwrite(struct dev_write_args *ap) 518 { 519 dev_t dev = ap->a_head.a_dev; 520 struct tty *tp = dev->si_tty; 521 u_char *cp = 0; 522 int cc = 0; 523 u_char locbuf[BUFSIZ]; 524 int cnt = 0; 525 struct pt_ioctl *pti = dev->si_drv1; 526 int error = 0; 527 528 again: 529 if ((tp->t_state&TS_ISOPEN) == 0) 530 goto block; 531 if (pti->pt_flags & PF_REMOTE) { 532 if (tp->t_canq.c_cc) 533 goto block; 534 while ((ap->a_uio->uio_resid > 0 || cc > 0) && 535 tp->t_canq.c_cc < TTYHOG - 1) { 536 if (cc == 0) { 537 cc = min(ap->a_uio->uio_resid, BUFSIZ); 538 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 539 cp = locbuf; 540 error = uiomove((caddr_t)cp, cc, ap->a_uio); 541 if (error) 542 return (error); 543 /* check again for safety */ 544 if ((tp->t_state & TS_ISOPEN) == 0) { 545 /* adjust as usual */ 546 ap->a_uio->uio_resid += cc; 547 return (EIO); 548 } 549 } 550 if (cc > 0) { 551 cc = b_to_q((char *)cp, cc, &tp->t_canq); 552 /* 553 * XXX we don't guarantee that the canq size 554 * is >= TTYHOG, so the above b_to_q() may 555 * leave some bytes uncopied. However, space 556 * is guaranteed for the null terminator if 557 * we don't fail here since (TTYHOG - 1) is 558 * not a multiple of CBSIZE. 559 */ 560 if (cc > 0) 561 break; 562 } 563 } 564 /* adjust for data copied in but not written */ 565 ap->a_uio->uio_resid += cc; 566 (void) putc(0, &tp->t_canq); 567 ttwakeup(tp); 568 wakeup(TSA_PTS_READ(tp)); 569 return (0); 570 } 571 while (ap->a_uio->uio_resid > 0 || cc > 0) { 572 if (cc == 0) { 573 cc = min(ap->a_uio->uio_resid, BUFSIZ); 574 cp = locbuf; 575 error = uiomove((caddr_t)cp, cc, ap->a_uio); 576 if (error) 577 return (error); 578 /* check again for safety */ 579 if ((tp->t_state & TS_ISOPEN) == 0) { 580 /* adjust for data copied in but not written */ 581 ap->a_uio->uio_resid += cc; 582 return (EIO); 583 } 584 } 585 while (cc > 0) { 586 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 587 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) { 588 wakeup(TSA_HUP_OR_INPUT(tp)); 589 goto block; 590 } 591 (*linesw[tp->t_line].l_rint)(*cp++, tp); 592 cnt++; 593 cc--; 594 } 595 cc = 0; 596 } 597 return (0); 598 block: 599 /* 600 * Come here to wait for slave to open, for space 601 * in outq, or space in rawq, or an empty canq. 602 */ 603 if ((tp->t_state & TS_CONNECTED) == 0) { 604 /* adjust for data copied in but not written */ 605 ap->a_uio->uio_resid += cc; 606 return (EIO); 607 } 608 if (ap->a_ioflag & IO_NDELAY) { 609 /* adjust for data copied in but not written */ 610 ap->a_uio->uio_resid += cc; 611 if (cnt == 0) 612 return (EWOULDBLOCK); 613 return (0); 614 } 615 error = tsleep(TSA_PTC_WRITE(tp), PCATCH, "ptcout", 0); 616 if (error) { 617 /* adjust for data copied in but not written */ 618 ap->a_uio->uio_resid += cc; 619 return (error); 620 } 621 goto again; 622 } 623 624 /*ARGSUSED*/ 625 static int 626 ptyioctl(struct dev_ioctl_args *ap) 627 { 628 dev_t dev = ap->a_head.a_dev; 629 struct tty *tp = dev->si_tty; 630 struct pt_ioctl *pti = dev->si_drv1; 631 u_char *cc = tp->t_cc; 632 int stop, error; 633 634 if (dev_dflags(dev) & D_MASTER) { 635 switch (ap->a_cmd) { 636 637 case TIOCGPGRP: 638 /* 639 * We avoid calling ttioctl on the controller since, 640 * in that case, tp must be the controlling terminal. 641 */ 642 *(int *)ap->a_data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 643 return (0); 644 645 case TIOCPKT: 646 if (*(int *)ap->a_data) { 647 if (pti->pt_flags & PF_UCNTL) 648 return (EINVAL); 649 pti->pt_flags |= PF_PKT; 650 } else 651 pti->pt_flags &= ~PF_PKT; 652 return (0); 653 654 case TIOCUCNTL: 655 if (*(int *)ap->a_data) { 656 if (pti->pt_flags & PF_PKT) 657 return (EINVAL); 658 pti->pt_flags |= PF_UCNTL; 659 } else 660 pti->pt_flags &= ~PF_UCNTL; 661 return (0); 662 663 case TIOCREMOTE: 664 if (*(int *)ap->a_data) 665 pti->pt_flags |= PF_REMOTE; 666 else 667 pti->pt_flags &= ~PF_REMOTE; 668 ttyflush(tp, FREAD|FWRITE); 669 return (0); 670 } 671 672 /* 673 * The rest of the ioctls shouldn't be called until 674 * the slave is open. 675 */ 676 if ((tp->t_state & TS_ISOPEN) == 0) 677 return (EAGAIN); 678 679 switch (ap->a_cmd) { 680 #ifdef COMPAT_43 681 case TIOCSETP: 682 case TIOCSETN: 683 #endif 684 case TIOCSETD: 685 case TIOCSETA: 686 case TIOCSETAW: 687 case TIOCSETAF: 688 /* 689 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 690 * ttywflush(tp) will hang if there are characters in 691 * the outq. 692 */ 693 ndflush(&tp->t_outq, tp->t_outq.c_cc); 694 break; 695 696 case TIOCSIG: 697 if (*(unsigned int *)ap->a_data >= NSIG || 698 *(unsigned int *)ap->a_data == 0) 699 return(EINVAL); 700 if ((tp->t_lflag&NOFLSH) == 0) 701 ttyflush(tp, FREAD|FWRITE); 702 pgsignal(tp->t_pgrp, *(unsigned int *)ap->a_data, 1); 703 if ((*(unsigned int *)ap->a_data == SIGINFO) && 704 ((tp->t_lflag&NOKERNINFO) == 0)) 705 ttyinfo(tp); 706 return(0); 707 } 708 } 709 if (ap->a_cmd == TIOCEXT) { 710 /* 711 * When the EXTPROC bit is being toggled, we need 712 * to send an TIOCPKT_IOCTL if the packet driver 713 * is turned on. 714 */ 715 if (*(int *)ap->a_data) { 716 if (pti->pt_flags & PF_PKT) { 717 pti->pt_send |= TIOCPKT_IOCTL; 718 ptcwakeup(tp, FREAD); 719 } 720 tp->t_lflag |= EXTPROC; 721 } else { 722 if ((tp->t_lflag & EXTPROC) && 723 (pti->pt_flags & PF_PKT)) { 724 pti->pt_send |= TIOCPKT_IOCTL; 725 ptcwakeup(tp, FREAD); 726 } 727 tp->t_lflag &= ~EXTPROC; 728 } 729 return(0); 730 } 731 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data, 732 ap->a_fflag, ap->a_cred); 733 if (error == ENOIOCTL) 734 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag); 735 if (error == ENOIOCTL) { 736 if (pti->pt_flags & PF_UCNTL && 737 (ap->a_cmd & ~0xff) == UIOCCMD(0)) { 738 if (ap->a_cmd & 0xff) { 739 pti->pt_ucntl = (u_char)ap->a_cmd; 740 ptcwakeup(tp, FREAD); 741 } 742 return (0); 743 } 744 error = ENOTTY; 745 } 746 /* 747 * If external processing and packet mode send ioctl packet. 748 */ 749 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 750 switch(ap->a_cmd) { 751 case TIOCSETA: 752 case TIOCSETAW: 753 case TIOCSETAF: 754 #ifdef COMPAT_43 755 case TIOCSETP: 756 case TIOCSETN: 757 #endif 758 #if defined(COMPAT_43) || defined(COMPAT_SUNOS) 759 case TIOCSETC: 760 case TIOCSLTC: 761 case TIOCLBIS: 762 case TIOCLBIC: 763 case TIOCLSET: 764 #endif 765 pti->pt_send |= TIOCPKT_IOCTL; 766 ptcwakeup(tp, FREAD); 767 default: 768 break; 769 } 770 } 771 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 772 && CCEQ(cc[VSTART], CTRL('q')); 773 if (pti->pt_flags & PF_NOSTOP) { 774 if (stop) { 775 pti->pt_send &= ~TIOCPKT_NOSTOP; 776 pti->pt_send |= TIOCPKT_DOSTOP; 777 pti->pt_flags &= ~PF_NOSTOP; 778 ptcwakeup(tp, FREAD); 779 } 780 } else { 781 if (!stop) { 782 pti->pt_send &= ~TIOCPKT_DOSTOP; 783 pti->pt_send |= TIOCPKT_NOSTOP; 784 pti->pt_flags |= PF_NOSTOP; 785 ptcwakeup(tp, FREAD); 786 } 787 } 788 return (error); 789 } 790 791 792 static void ptc_drvinit (void *unused); 793 794 static void 795 ptc_drvinit(unused) 796 void *unused; 797 { 798 dev_ops_add(&pts_ops, 0, 0); 799 dev_ops_add(&ptc_ops, 0, 0); 800 /* XXX: Gross hack for DEVFS */ 801 /* XXX: DEVFS is no more, should this be removed? */ 802 ptyinit(0); 803 } 804 805 SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL) 806