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 1.18 2006/12/23 23:47:54 swildner 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 cdev_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(int n) 133 { 134 cdev_t devs, devc; 135 char *names = "pqrsPQRS"; 136 struct pt_ioctl *pt; 137 138 /* For now we only map the lower 8 bits of the minor */ 139 if (n & ~0xff) 140 return; 141 142 pt = kmalloc(sizeof(*pt), M_PTY, M_WAITOK); 143 bzero(pt, sizeof(*pt)); 144 pt->devs = devs = make_dev(&pts_ops, n, 145 0, 0, 0666, "tty%c%r", names[n / 32], n % 32); 146 pt->devc = devc = make_dev(&ptc_ops, n, 147 0, 0, 0666, "pty%c%r", names[n / 32], n % 32); 148 149 devs->si_drv1 = devc->si_drv1 = pt; 150 devs->si_tty = devc->si_tty = &pt->pt_tty; 151 pt->pt_tty.t_dev = devs; 152 ttyregister(&pt->pt_tty); 153 } 154 155 /*ARGSUSED*/ 156 static int 157 ptsopen(struct dev_open_args *ap) 158 { 159 cdev_t dev = ap->a_head.a_dev; 160 struct tty *tp; 161 int error; 162 int minr; 163 #if 0 164 cdev_t nextdev; 165 #endif 166 struct pt_ioctl *pti; 167 168 minr = lminor(dev); 169 #if 0 170 /* 171 * REMOVED gross hack for devfs. also note that makedev() 172 * no longer exists in this form and reference counting makes 173 * this a problem if we don't clean it out later. 174 */ 175 if (minr < 255) { 176 nextdev = make_sub_dev(dev, minr + 1); 177 if (!nextdev->si_drv1) { 178 ptyinit(minr + 1); 179 } 180 } 181 #endif 182 if (!dev->si_drv1) 183 ptyinit(minor(dev)); 184 if (!dev->si_drv1) 185 return(ENXIO); 186 pti = dev->si_drv1; 187 tp = dev->si_tty; 188 if ((tp->t_state & TS_ISOPEN) == 0) { 189 ttychars(tp); /* Set up default chars */ 190 tp->t_iflag = TTYDEF_IFLAG; 191 tp->t_oflag = TTYDEF_OFLAG; 192 tp->t_lflag = TTYDEF_LFLAG; 193 tp->t_cflag = TTYDEF_CFLAG; 194 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 195 } else if ((tp->t_state & TS_XCLUDE) && suser_cred(ap->a_cred, 0)) { 196 return (EBUSY); 197 } else if (pti->pt_prison != ap->a_cred->cr_prison) { 198 return (EBUSY); 199 } 200 if (tp->t_oproc) /* Ctrlr still around. */ 201 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 202 while ((tp->t_state & TS_CARR_ON) == 0) { 203 if (ap->a_oflags & FNONBLOCK) 204 break; 205 error = ttysleep(tp, TSA_CARR_ON(tp), PCATCH, "ptsopn", 0); 206 if (error) 207 return (error); 208 } 209 error = (*linesw[tp->t_line].l_open)(dev, tp); 210 if (error == 0) 211 ptcwakeup(tp, FREAD|FWRITE); 212 return (error); 213 } 214 215 static int 216 ptsclose(struct dev_close_args *ap) 217 { 218 cdev_t dev = ap->a_head.a_dev; 219 struct tty *tp; 220 int err; 221 222 tp = dev->si_tty; 223 err = (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 224 ptsstop(tp, FREAD|FWRITE); 225 (void) ttyclose(tp); 226 return (err); 227 } 228 229 static int 230 ptsread(struct dev_read_args *ap) 231 { 232 cdev_t dev = ap->a_head.a_dev; 233 struct proc *p = curproc; 234 struct tty *tp = dev->si_tty; 235 struct pt_ioctl *pti = dev->si_drv1; 236 int error = 0; 237 238 again: 239 if (pti->pt_flags & PF_REMOTE) { 240 while (isbackground(p, tp)) { 241 if (SIGISMEMBER(p->p_sigignore, SIGTTIN) || 242 SIGISMEMBER(p->p_sigmask, SIGTTIN) || 243 p->p_pgrp->pg_jobc == 0 || p->p_flag & P_PPWAIT) 244 return (EIO); 245 pgsignal(p->p_pgrp, SIGTTIN, 1); 246 error = ttysleep(tp, &lbolt, PCATCH, "ptsbg", 0); 247 if (error) 248 return (error); 249 } 250 if (tp->t_canq.c_cc == 0) { 251 if (ap->a_ioflag & IO_NDELAY) 252 return (EWOULDBLOCK); 253 error = ttysleep(tp, TSA_PTS_READ(tp), PCATCH, 254 "ptsin", 0); 255 if (error) 256 return (error); 257 goto again; 258 } 259 while (tp->t_canq.c_cc > 1 && ap->a_uio->uio_resid > 0) 260 if (ureadc(clist_getc(&tp->t_canq), ap->a_uio) < 0) { 261 error = EFAULT; 262 break; 263 } 264 if (tp->t_canq.c_cc == 1) 265 clist_getc(&tp->t_canq); 266 if (tp->t_canq.c_cc) 267 return (error); 268 } else 269 if (tp->t_oproc) 270 error = (*linesw[tp->t_line].l_read)(tp, ap->a_uio, ap->a_ioflag); 271 ptcwakeup(tp, FWRITE); 272 return (error); 273 } 274 275 /* 276 * Write to pseudo-tty. 277 * Wakeups of controlling tty will happen 278 * indirectly, when tty driver calls ptsstart. 279 */ 280 static int 281 ptswrite(struct dev_write_args *ap) 282 { 283 cdev_t dev = ap->a_head.a_dev; 284 struct tty *tp; 285 286 tp = dev->si_tty; 287 if (tp->t_oproc == 0) 288 return (EIO); 289 return ((*linesw[tp->t_line].l_write)(tp, ap->a_uio, ap->a_ioflag)); 290 } 291 292 /* 293 * Start output on pseudo-tty. 294 * Wake up process selecting or sleeping for input from controlling tty. 295 */ 296 static void 297 ptsstart(struct tty *tp) 298 { 299 struct pt_ioctl *pti = tp->t_dev->si_drv1; 300 301 if (tp->t_state & TS_TTSTOP) 302 return; 303 if (pti->pt_flags & PF_STOPPED) { 304 pti->pt_flags &= ~PF_STOPPED; 305 pti->pt_send = TIOCPKT_START; 306 } 307 ptcwakeup(tp, FREAD); 308 } 309 310 static void 311 ptcwakeup(struct tty *tp, int flag) 312 { 313 struct pt_ioctl *pti = tp->t_dev->si_drv1; 314 315 if (flag & FREAD) { 316 selwakeup(&pti->pt_selr); 317 wakeup(TSA_PTC_READ(tp)); 318 } 319 if (flag & FWRITE) { 320 selwakeup(&pti->pt_selw); 321 wakeup(TSA_PTC_WRITE(tp)); 322 } 323 } 324 325 static int 326 ptcopen(struct dev_open_args *ap) 327 { 328 cdev_t dev = ap->a_head.a_dev; 329 struct tty *tp; 330 struct pt_ioctl *pti; 331 332 if (!dev->si_drv1) 333 ptyinit(minor(dev)); 334 if (!dev->si_drv1) 335 return(ENXIO); 336 tp = dev->si_tty; 337 if (tp->t_oproc) 338 return (EIO); 339 tp->t_oproc = ptsstart; 340 tp->t_stop = ptsstop; 341 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 342 tp->t_lflag &= ~EXTPROC; 343 pti = dev->si_drv1; 344 pti->pt_prison = ap->a_cred->cr_prison; 345 pti->pt_flags = 0; 346 pti->pt_send = 0; 347 pti->pt_ucntl = 0; 348 return (0); 349 } 350 351 static int 352 ptcclose(struct dev_close_args *ap) 353 { 354 cdev_t dev = ap->a_head.a_dev; 355 struct tty *tp; 356 357 tp = dev->si_tty; 358 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 359 360 /* 361 * XXX MDMBUF makes no sense for ptys but would inhibit the above 362 * l_modem(). CLOCAL makes sense but isn't supported. Special 363 * l_modem()s that ignore carrier drop make no sense for ptys but 364 * may be in use because other parts of the line discipline make 365 * sense for ptys. Recover by doing everything that a normal 366 * ttymodem() would have done except for sending a SIGHUP. 367 */ 368 if (tp->t_state & TS_ISOPEN) { 369 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 370 tp->t_state |= TS_ZOMBIE; 371 ttyflush(tp, FREAD | FWRITE); 372 } 373 374 tp->t_oproc = 0; /* mark closed */ 375 return (0); 376 } 377 378 static int 379 ptcread(struct dev_read_args *ap) 380 { 381 cdev_t dev = ap->a_head.a_dev; 382 struct tty *tp = dev->si_tty; 383 struct pt_ioctl *pti = dev->si_drv1; 384 char buf[BUFSIZ]; 385 int error = 0, cc; 386 387 /* 388 * We want to block until the slave 389 * is open, and there's something to read; 390 * but if we lost the slave or we're NBIO, 391 * then return the appropriate error instead. 392 */ 393 for (;;) { 394 if (tp->t_state&TS_ISOPEN) { 395 if (pti->pt_flags&PF_PKT && pti->pt_send) { 396 error = ureadc((int)pti->pt_send, ap->a_uio); 397 if (error) 398 return (error); 399 if (pti->pt_send & TIOCPKT_IOCTL) { 400 cc = min(ap->a_uio->uio_resid, 401 sizeof(tp->t_termios)); 402 uiomove((caddr_t)&tp->t_termios, cc, 403 ap->a_uio); 404 } 405 pti->pt_send = 0; 406 return (0); 407 } 408 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 409 error = ureadc((int)pti->pt_ucntl, ap->a_uio); 410 if (error) 411 return (error); 412 pti->pt_ucntl = 0; 413 return (0); 414 } 415 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 416 break; 417 } 418 if ((tp->t_state & TS_CONNECTED) == 0) 419 return (0); /* EOF */ 420 if (ap->a_ioflag & IO_NDELAY) 421 return (EWOULDBLOCK); 422 error = tsleep(TSA_PTC_READ(tp), PCATCH, "ptcin", 0); 423 if (error) 424 return (error); 425 } 426 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 427 error = ureadc(0, ap->a_uio); 428 while (ap->a_uio->uio_resid > 0 && error == 0) { 429 cc = q_to_b(&tp->t_outq, buf, min(ap->a_uio->uio_resid, BUFSIZ)); 430 if (cc <= 0) 431 break; 432 error = uiomove(buf, cc, ap->a_uio); 433 } 434 ttwwakeup(tp); 435 return (error); 436 } 437 438 static void 439 ptsstop(struct tty *tp, int flush) 440 { 441 struct pt_ioctl *pti = tp->t_dev->si_drv1; 442 int flag; 443 444 /* note: FLUSHREAD and FLUSHWRITE already ok */ 445 if (flush == 0) { 446 flush = TIOCPKT_STOP; 447 pti->pt_flags |= PF_STOPPED; 448 } else 449 pti->pt_flags &= ~PF_STOPPED; 450 pti->pt_send |= flush; 451 /* change of perspective */ 452 flag = 0; 453 if (flush & FREAD) 454 flag |= FWRITE; 455 if (flush & FWRITE) 456 flag |= FREAD; 457 ptcwakeup(tp, flag); 458 } 459 460 static int 461 ptcpoll(struct dev_poll_args *ap) 462 { 463 cdev_t dev = ap->a_head.a_dev; 464 struct tty *tp = dev->si_tty; 465 struct pt_ioctl *pti = dev->si_drv1; 466 int revents = 0; 467 468 if ((tp->t_state & TS_CONNECTED) == 0) { 469 ap->a_events = seltrue(dev, ap->a_events) | POLLHUP; 470 return(0); 471 } 472 473 /* 474 * Need to block timeouts (ttrstart). 475 */ 476 crit_enter(); 477 478 if (ap->a_events & (POLLIN | POLLRDNORM)) 479 if ((tp->t_state & TS_ISOPEN) && 480 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 481 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 482 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 483 revents |= ap->a_events & (POLLIN | POLLRDNORM); 484 485 if (ap->a_events & (POLLOUT | POLLWRNORM)) 486 if (tp->t_state & TS_ISOPEN && 487 ((pti->pt_flags & PF_REMOTE) ? 488 (tp->t_canq.c_cc == 0) : 489 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 490 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON))))) 491 revents |= ap->a_events & (POLLOUT | POLLWRNORM); 492 493 if (ap->a_events & POLLHUP) 494 if ((tp->t_state & TS_CARR_ON) == 0) 495 revents |= POLLHUP; 496 497 if (revents == 0) { 498 if (ap->a_events & (POLLIN | POLLRDNORM)) 499 selrecord(curthread, &pti->pt_selr); 500 501 if (ap->a_events & (POLLOUT | POLLWRNORM)) 502 selrecord(curthread, &pti->pt_selw); 503 } 504 crit_exit(); 505 506 ap->a_events = revents; 507 return (0); 508 } 509 510 static int 511 ptcwrite(struct dev_write_args *ap) 512 { 513 cdev_t dev = ap->a_head.a_dev; 514 struct tty *tp = dev->si_tty; 515 u_char *cp = 0; 516 int cc = 0; 517 u_char locbuf[BUFSIZ]; 518 int cnt = 0; 519 struct pt_ioctl *pti = dev->si_drv1; 520 int error = 0; 521 522 again: 523 if ((tp->t_state&TS_ISOPEN) == 0) 524 goto block; 525 if (pti->pt_flags & PF_REMOTE) { 526 if (tp->t_canq.c_cc) 527 goto block; 528 while ((ap->a_uio->uio_resid > 0 || cc > 0) && 529 tp->t_canq.c_cc < TTYHOG - 1) { 530 if (cc == 0) { 531 cc = min(ap->a_uio->uio_resid, BUFSIZ); 532 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 533 cp = locbuf; 534 error = uiomove((caddr_t)cp, cc, ap->a_uio); 535 if (error) 536 return (error); 537 /* check again for safety */ 538 if ((tp->t_state & TS_ISOPEN) == 0) { 539 /* adjust as usual */ 540 ap->a_uio->uio_resid += cc; 541 return (EIO); 542 } 543 } 544 if (cc > 0) { 545 cc = b_to_q((char *)cp, cc, &tp->t_canq); 546 /* 547 * XXX we don't guarantee that the canq size 548 * is >= TTYHOG, so the above b_to_q() may 549 * leave some bytes uncopied. However, space 550 * is guaranteed for the null terminator if 551 * we don't fail here since (TTYHOG - 1) is 552 * not a multiple of CBSIZE. 553 */ 554 if (cc > 0) 555 break; 556 } 557 } 558 /* adjust for data copied in but not written */ 559 ap->a_uio->uio_resid += cc; 560 clist_putc(0, &tp->t_canq); 561 ttwakeup(tp); 562 wakeup(TSA_PTS_READ(tp)); 563 return (0); 564 } 565 while (ap->a_uio->uio_resid > 0 || cc > 0) { 566 if (cc == 0) { 567 cc = min(ap->a_uio->uio_resid, BUFSIZ); 568 cp = locbuf; 569 error = uiomove((caddr_t)cp, cc, ap->a_uio); 570 if (error) 571 return (error); 572 /* check again for safety */ 573 if ((tp->t_state & TS_ISOPEN) == 0) { 574 /* adjust for data copied in but not written */ 575 ap->a_uio->uio_resid += cc; 576 return (EIO); 577 } 578 } 579 while (cc > 0) { 580 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 581 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) { 582 wakeup(TSA_HUP_OR_INPUT(tp)); 583 goto block; 584 } 585 (*linesw[tp->t_line].l_rint)(*cp++, tp); 586 cnt++; 587 cc--; 588 } 589 cc = 0; 590 } 591 return (0); 592 block: 593 /* 594 * Come here to wait for slave to open, for space 595 * in outq, or space in rawq, or an empty canq. 596 */ 597 if ((tp->t_state & TS_CONNECTED) == 0) { 598 /* adjust for data copied in but not written */ 599 ap->a_uio->uio_resid += cc; 600 return (EIO); 601 } 602 if (ap->a_ioflag & IO_NDELAY) { 603 /* adjust for data copied in but not written */ 604 ap->a_uio->uio_resid += cc; 605 if (cnt == 0) 606 return (EWOULDBLOCK); 607 return (0); 608 } 609 error = tsleep(TSA_PTC_WRITE(tp), PCATCH, "ptcout", 0); 610 if (error) { 611 /* adjust for data copied in but not written */ 612 ap->a_uio->uio_resid += cc; 613 return (error); 614 } 615 goto again; 616 } 617 618 /*ARGSUSED*/ 619 static int 620 ptyioctl(struct dev_ioctl_args *ap) 621 { 622 cdev_t dev = ap->a_head.a_dev; 623 struct tty *tp = dev->si_tty; 624 struct pt_ioctl *pti = dev->si_drv1; 625 u_char *cc = tp->t_cc; 626 int stop, error; 627 628 if (dev_dflags(dev) & D_MASTER) { 629 switch (ap->a_cmd) { 630 631 case TIOCGPGRP: 632 /* 633 * We avoid calling ttioctl on the controller since, 634 * in that case, tp must be the controlling terminal. 635 */ 636 *(int *)ap->a_data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 637 return (0); 638 639 case TIOCPKT: 640 if (*(int *)ap->a_data) { 641 if (pti->pt_flags & PF_UCNTL) 642 return (EINVAL); 643 pti->pt_flags |= PF_PKT; 644 } else 645 pti->pt_flags &= ~PF_PKT; 646 return (0); 647 648 case TIOCUCNTL: 649 if (*(int *)ap->a_data) { 650 if (pti->pt_flags & PF_PKT) 651 return (EINVAL); 652 pti->pt_flags |= PF_UCNTL; 653 } else 654 pti->pt_flags &= ~PF_UCNTL; 655 return (0); 656 657 case TIOCREMOTE: 658 if (*(int *)ap->a_data) 659 pti->pt_flags |= PF_REMOTE; 660 else 661 pti->pt_flags &= ~PF_REMOTE; 662 ttyflush(tp, FREAD|FWRITE); 663 return (0); 664 } 665 666 /* 667 * The rest of the ioctls shouldn't be called until 668 * the slave is open. 669 */ 670 if ((tp->t_state & TS_ISOPEN) == 0) 671 return (EAGAIN); 672 673 switch (ap->a_cmd) { 674 #ifdef COMPAT_43 675 case TIOCSETP: 676 case TIOCSETN: 677 #endif 678 case TIOCSETD: 679 case TIOCSETA: 680 case TIOCSETAW: 681 case TIOCSETAF: 682 /* 683 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 684 * ttywflush(tp) will hang if there are characters in 685 * the outq. 686 */ 687 ndflush(&tp->t_outq, tp->t_outq.c_cc); 688 break; 689 690 case TIOCSIG: 691 if (*(unsigned int *)ap->a_data >= NSIG || 692 *(unsigned int *)ap->a_data == 0) 693 return(EINVAL); 694 if ((tp->t_lflag&NOFLSH) == 0) 695 ttyflush(tp, FREAD|FWRITE); 696 pgsignal(tp->t_pgrp, *(unsigned int *)ap->a_data, 1); 697 if ((*(unsigned int *)ap->a_data == SIGINFO) && 698 ((tp->t_lflag&NOKERNINFO) == 0)) 699 ttyinfo(tp); 700 return(0); 701 } 702 } 703 if (ap->a_cmd == TIOCEXT) { 704 /* 705 * When the EXTPROC bit is being toggled, we need 706 * to send an TIOCPKT_IOCTL if the packet driver 707 * is turned on. 708 */ 709 if (*(int *)ap->a_data) { 710 if (pti->pt_flags & PF_PKT) { 711 pti->pt_send |= TIOCPKT_IOCTL; 712 ptcwakeup(tp, FREAD); 713 } 714 tp->t_lflag |= EXTPROC; 715 } else { 716 if ((tp->t_lflag & EXTPROC) && 717 (pti->pt_flags & PF_PKT)) { 718 pti->pt_send |= TIOCPKT_IOCTL; 719 ptcwakeup(tp, FREAD); 720 } 721 tp->t_lflag &= ~EXTPROC; 722 } 723 return(0); 724 } 725 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data, 726 ap->a_fflag, ap->a_cred); 727 if (error == ENOIOCTL) 728 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag); 729 if (error == ENOIOCTL) { 730 if (pti->pt_flags & PF_UCNTL && 731 (ap->a_cmd & ~0xff) == UIOCCMD(0)) { 732 if (ap->a_cmd & 0xff) { 733 pti->pt_ucntl = (u_char)ap->a_cmd; 734 ptcwakeup(tp, FREAD); 735 } 736 return (0); 737 } 738 error = ENOTTY; 739 } 740 /* 741 * If external processing and packet mode send ioctl packet. 742 */ 743 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 744 switch(ap->a_cmd) { 745 case TIOCSETA: 746 case TIOCSETAW: 747 case TIOCSETAF: 748 #ifdef COMPAT_43 749 case TIOCSETP: 750 case TIOCSETN: 751 #endif 752 #if defined(COMPAT_43) || defined(COMPAT_SUNOS) 753 case TIOCSETC: 754 case TIOCSLTC: 755 case TIOCLBIS: 756 case TIOCLBIC: 757 case TIOCLSET: 758 #endif 759 pti->pt_send |= TIOCPKT_IOCTL; 760 ptcwakeup(tp, FREAD); 761 default: 762 break; 763 } 764 } 765 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 766 && CCEQ(cc[VSTART], CTRL('q')); 767 if (pti->pt_flags & PF_NOSTOP) { 768 if (stop) { 769 pti->pt_send &= ~TIOCPKT_NOSTOP; 770 pti->pt_send |= TIOCPKT_DOSTOP; 771 pti->pt_flags &= ~PF_NOSTOP; 772 ptcwakeup(tp, FREAD); 773 } 774 } else { 775 if (!stop) { 776 pti->pt_send &= ~TIOCPKT_DOSTOP; 777 pti->pt_send |= TIOCPKT_NOSTOP; 778 pti->pt_flags |= PF_NOSTOP; 779 ptcwakeup(tp, FREAD); 780 } 781 } 782 return (error); 783 } 784 785 786 static void ptc_drvinit (void *unused); 787 788 static void 789 ptc_drvinit(void *unused) 790 { 791 dev_ops_add(&pts_ops, 0, 0); 792 dev_ops_add(&ptc_ops, 0, 0); 793 /* XXX: Gross hack for DEVFS */ 794 /* XXX: DEVFS is no more, should this be removed? */ 795 ptyinit(0); 796 } 797 798 SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL) 799