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 1.21 2008/08/13 10:29:38 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/priv.h> 52 #include <sys/tty.h> 53 #include <sys/conf.h> 54 #include <sys/fcntl.h> 55 #include <sys/poll.h> 56 #include <sys/kernel.h> 57 #include <sys/vnode.h> 58 #include <sys/signalvar.h> 59 #include <sys/malloc.h> 60 #include <sys/device.h> 61 #include <sys/thread2.h> 62 63 MALLOC_DEFINE(M_PTY, "ptys", "pty data structures"); 64 65 static void ptsstart (struct tty *tp); 66 static void ptsstop (struct tty *tp, int rw); 67 static void ptcwakeup (struct tty *tp, int flag); 68 static void ptyinit (int n); 69 70 static d_open_t ptsopen; 71 static d_close_t ptsclose; 72 static d_read_t ptsread; 73 static d_write_t ptswrite; 74 static d_ioctl_t ptyioctl; 75 static d_open_t ptcopen; 76 static d_close_t ptcclose; 77 static d_read_t ptcread; 78 static d_write_t ptcwrite; 79 static d_poll_t ptcpoll; 80 81 #define CDEV_MAJOR_S 5 82 static struct dev_ops pts_ops = { 83 { "pts", CDEV_MAJOR_S, D_TTY | D_KQFILTER }, 84 .d_open = ptsopen, 85 .d_close = ptsclose, 86 .d_read = ptsread, 87 .d_write = ptswrite, 88 .d_ioctl = ptyioctl, 89 .d_poll = ttypoll, 90 .d_kqfilter = ttykqfilter 91 }; 92 93 #define CDEV_MAJOR_C 6 94 static struct dev_ops ptc_ops = { 95 { "ptc", CDEV_MAJOR_C, D_TTY | D_KQFILTER | D_MASTER }, 96 .d_open = ptcopen, 97 .d_close = ptcclose, 98 .d_read = ptcread, 99 .d_write = ptcwrite, 100 .d_ioctl = ptyioctl, 101 .d_poll = ptcpoll, 102 .d_kqfilter = ttykqfilter 103 }; 104 105 #define BUFSIZ 100 /* Chunk size iomoved to/from user */ 106 107 struct pt_ioctl { 108 int pt_flags; 109 struct selinfo pt_selr, pt_selw; 110 u_char pt_send; 111 u_char pt_ucntl; 112 struct tty pt_tty; 113 cdev_t devs, devc; 114 struct prison *pt_prison; 115 }; 116 117 #define PF_PKT 0x08 /* packet mode */ 118 #define PF_STOPPED 0x10 /* user told stopped */ 119 #define PF_REMOTE 0x20 /* remote and flow controlled input */ 120 #define PF_NOSTOP 0x40 121 #define PF_UCNTL 0x80 /* user control mode */ 122 123 /* 124 * This function creates and initializes a pts/ptc pair 125 * 126 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 127 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 128 * 129 * XXX: define and add mapping of upper minor bits to allow more 130 * than 256 ptys. 131 */ 132 static void 133 ptyinit(int n) 134 { 135 cdev_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 = kmalloc(sizeof(*pt), M_PTY, M_WAITOK | M_ZERO); 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 #if 0 163 int minr; 164 cdev_t nextdev; 165 #endif 166 struct pt_ioctl *pti; 167 168 #if 0 169 minr = lminor(dev); 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) && priv_check_cred(ap->a_cred, PRIV_ROOT, 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 struct lwp *lp; 237 238 int error = 0; 239 240 lp = curthread->td_lwp; 241 242 again: 243 if (pti->pt_flags & PF_REMOTE) { 244 while (isbackground(p, tp)) { 245 if (SIGISMEMBER(p->p_sigignore, SIGTTIN) || 246 SIGISMEMBER(lp->lwp_sigmask, SIGTTIN) || 247 p->p_pgrp->pg_jobc == 0 || p->p_flag & P_PPWAIT) 248 return (EIO); 249 pgsignal(p->p_pgrp, SIGTTIN, 1); 250 error = ttysleep(tp, &lbolt, PCATCH, "ptsbg", 0); 251 if (error) 252 return (error); 253 } 254 if (tp->t_canq.c_cc == 0) { 255 if (ap->a_ioflag & IO_NDELAY) 256 return (EWOULDBLOCK); 257 error = ttysleep(tp, TSA_PTS_READ(tp), PCATCH, 258 "ptsin", 0); 259 if (error) 260 return (error); 261 goto again; 262 } 263 while (tp->t_canq.c_cc > 1 && ap->a_uio->uio_resid > 0) 264 if (ureadc(clist_getc(&tp->t_canq), ap->a_uio) < 0) { 265 error = EFAULT; 266 break; 267 } 268 if (tp->t_canq.c_cc == 1) 269 clist_getc(&tp->t_canq); 270 if (tp->t_canq.c_cc) 271 return (error); 272 } else 273 if (tp->t_oproc) 274 error = (*linesw[tp->t_line].l_read)(tp, ap->a_uio, ap->a_ioflag); 275 ptcwakeup(tp, FWRITE); 276 return (error); 277 } 278 279 /* 280 * Write to pseudo-tty. 281 * Wakeups of controlling tty will happen 282 * indirectly, when tty driver calls ptsstart. 283 */ 284 static int 285 ptswrite(struct dev_write_args *ap) 286 { 287 cdev_t dev = ap->a_head.a_dev; 288 struct tty *tp; 289 290 tp = dev->si_tty; 291 if (tp->t_oproc == 0) 292 return (EIO); 293 return ((*linesw[tp->t_line].l_write)(tp, ap->a_uio, ap->a_ioflag)); 294 } 295 296 /* 297 * Start output on pseudo-tty. 298 * Wake up process selecting or sleeping for input from controlling tty. 299 */ 300 static void 301 ptsstart(struct tty *tp) 302 { 303 struct pt_ioctl *pti = tp->t_dev->si_drv1; 304 305 if (tp->t_state & TS_TTSTOP) 306 return; 307 if (pti->pt_flags & PF_STOPPED) { 308 pti->pt_flags &= ~PF_STOPPED; 309 pti->pt_send = TIOCPKT_START; 310 } 311 ptcwakeup(tp, FREAD); 312 } 313 314 static void 315 ptcwakeup(struct tty *tp, 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 cdev_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 cdev_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 cdev_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(struct tty *tp, int flush) 444 { 445 struct pt_ioctl *pti = tp->t_dev->si_drv1; 446 int flag; 447 448 /* note: FLUSHREAD and FLUSHWRITE already ok */ 449 if (flush == 0) { 450 flush = TIOCPKT_STOP; 451 pti->pt_flags |= PF_STOPPED; 452 } else 453 pti->pt_flags &= ~PF_STOPPED; 454 pti->pt_send |= flush; 455 /* change of perspective */ 456 flag = 0; 457 if (flush & FREAD) 458 flag |= FWRITE; 459 if (flush & FWRITE) 460 flag |= FREAD; 461 ptcwakeup(tp, flag); 462 } 463 464 static int 465 ptcpoll(struct dev_poll_args *ap) 466 { 467 cdev_t dev = ap->a_head.a_dev; 468 struct tty *tp = dev->si_tty; 469 struct pt_ioctl *pti = dev->si_drv1; 470 int revents = 0; 471 472 if ((tp->t_state & TS_CONNECTED) == 0) { 473 ap->a_events = seltrue(dev, ap->a_events) | POLLHUP; 474 return(0); 475 } 476 477 /* 478 * Need to block timeouts (ttrstart). 479 */ 480 crit_enter(); 481 482 if (ap->a_events & (POLLIN | POLLRDNORM)) 483 if ((tp->t_state & TS_ISOPEN) && 484 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 485 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 486 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 487 revents |= ap->a_events & (POLLIN | POLLRDNORM); 488 489 if (ap->a_events & (POLLOUT | POLLWRNORM)) 490 if (tp->t_state & TS_ISOPEN && 491 ((pti->pt_flags & PF_REMOTE) ? 492 (tp->t_canq.c_cc == 0) : 493 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 494 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON))))) 495 revents |= ap->a_events & (POLLOUT | POLLWRNORM); 496 497 if (ap->a_events & POLLHUP) 498 if ((tp->t_state & TS_CARR_ON) == 0) 499 revents |= POLLHUP; 500 501 if (revents == 0) { 502 if (ap->a_events & (POLLIN | POLLRDNORM)) 503 selrecord(curthread, &pti->pt_selr); 504 505 if (ap->a_events & (POLLOUT | POLLWRNORM)) 506 selrecord(curthread, &pti->pt_selw); 507 } 508 crit_exit(); 509 510 ap->a_events = revents; 511 return (0); 512 } 513 514 static int 515 ptcwrite(struct dev_write_args *ap) 516 { 517 cdev_t dev = ap->a_head.a_dev; 518 struct tty *tp = dev->si_tty; 519 u_char *cp = 0; 520 int cc = 0; 521 u_char locbuf[BUFSIZ]; 522 int cnt = 0; 523 struct pt_ioctl *pti = dev->si_drv1; 524 int error = 0; 525 526 again: 527 if ((tp->t_state&TS_ISOPEN) == 0) 528 goto block; 529 if (pti->pt_flags & PF_REMOTE) { 530 if (tp->t_canq.c_cc) 531 goto block; 532 while ((ap->a_uio->uio_resid > 0 || cc > 0) && 533 tp->t_canq.c_cc < TTYHOG - 1) { 534 if (cc == 0) { 535 cc = min(ap->a_uio->uio_resid, BUFSIZ); 536 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 537 cp = locbuf; 538 error = uiomove((caddr_t)cp, cc, ap->a_uio); 539 if (error) 540 return (error); 541 /* check again for safety */ 542 if ((tp->t_state & TS_ISOPEN) == 0) { 543 /* adjust as usual */ 544 ap->a_uio->uio_resid += cc; 545 return (EIO); 546 } 547 } 548 if (cc > 0) { 549 cc = b_to_q((char *)cp, cc, &tp->t_canq); 550 /* 551 * XXX we don't guarantee that the canq size 552 * is >= TTYHOG, so the above b_to_q() may 553 * leave some bytes uncopied. However, space 554 * is guaranteed for the null terminator if 555 * we don't fail here since (TTYHOG - 1) is 556 * not a multiple of CBSIZE. 557 */ 558 if (cc > 0) 559 break; 560 } 561 } 562 /* adjust for data copied in but not written */ 563 ap->a_uio->uio_resid += cc; 564 clist_putc(0, &tp->t_canq); 565 ttwakeup(tp); 566 wakeup(TSA_PTS_READ(tp)); 567 return (0); 568 } 569 while (ap->a_uio->uio_resid > 0 || cc > 0) { 570 if (cc == 0) { 571 cc = min(ap->a_uio->uio_resid, BUFSIZ); 572 cp = locbuf; 573 error = uiomove((caddr_t)cp, cc, ap->a_uio); 574 if (error) 575 return (error); 576 /* check again for safety */ 577 if ((tp->t_state & TS_ISOPEN) == 0) { 578 /* adjust for data copied in but not written */ 579 ap->a_uio->uio_resid += cc; 580 return (EIO); 581 } 582 } 583 while (cc > 0) { 584 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 585 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) { 586 wakeup(TSA_HUP_OR_INPUT(tp)); 587 goto block; 588 } 589 (*linesw[tp->t_line].l_rint)(*cp++, tp); 590 cnt++; 591 cc--; 592 } 593 cc = 0; 594 } 595 return (0); 596 block: 597 /* 598 * Come here to wait for slave to open, for space 599 * in outq, or space in rawq, or an empty canq. 600 */ 601 if ((tp->t_state & TS_CONNECTED) == 0) { 602 /* adjust for data copied in but not written */ 603 ap->a_uio->uio_resid += cc; 604 return (EIO); 605 } 606 if (ap->a_ioflag & IO_NDELAY) { 607 /* adjust for data copied in but not written */ 608 ap->a_uio->uio_resid += cc; 609 if (cnt == 0) 610 return (EWOULDBLOCK); 611 return (0); 612 } 613 error = tsleep(TSA_PTC_WRITE(tp), PCATCH, "ptcout", 0); 614 if (error) { 615 /* adjust for data copied in but not written */ 616 ap->a_uio->uio_resid += cc; 617 return (error); 618 } 619 goto again; 620 } 621 622 /*ARGSUSED*/ 623 static int 624 ptyioctl(struct dev_ioctl_args *ap) 625 { 626 cdev_t dev = ap->a_head.a_dev; 627 struct tty *tp = dev->si_tty; 628 struct pt_ioctl *pti = dev->si_drv1; 629 u_char *cc = tp->t_cc; 630 int stop, error; 631 632 if (dev_dflags(dev) & D_MASTER) { 633 switch (ap->a_cmd) { 634 635 case TIOCGPGRP: 636 /* 637 * We avoid calling ttioctl on the controller since, 638 * in that case, tp must be the controlling terminal. 639 */ 640 *(int *)ap->a_data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 641 return (0); 642 643 case TIOCPKT: 644 if (*(int *)ap->a_data) { 645 if (pti->pt_flags & PF_UCNTL) 646 return (EINVAL); 647 pti->pt_flags |= PF_PKT; 648 } else 649 pti->pt_flags &= ~PF_PKT; 650 return (0); 651 652 case TIOCUCNTL: 653 if (*(int *)ap->a_data) { 654 if (pti->pt_flags & PF_PKT) 655 return (EINVAL); 656 pti->pt_flags |= PF_UCNTL; 657 } else 658 pti->pt_flags &= ~PF_UCNTL; 659 return (0); 660 661 case TIOCREMOTE: 662 if (*(int *)ap->a_data) 663 pti->pt_flags |= PF_REMOTE; 664 else 665 pti->pt_flags &= ~PF_REMOTE; 666 ttyflush(tp, FREAD|FWRITE); 667 return (0); 668 } 669 670 /* 671 * The rest of the ioctls shouldn't be called until 672 * the slave is open. 673 */ 674 if ((tp->t_state & TS_ISOPEN) == 0) 675 return (EAGAIN); 676 677 switch (ap->a_cmd) { 678 #ifdef COMPAT_43 679 case TIOCSETP: 680 case TIOCSETN: 681 #endif 682 case TIOCSETD: 683 case TIOCSETA: 684 case TIOCSETAW: 685 case TIOCSETAF: 686 /* 687 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 688 * ttywflush(tp) will hang if there are characters in 689 * the outq. 690 */ 691 ndflush(&tp->t_outq, tp->t_outq.c_cc); 692 break; 693 694 case TIOCSIG: 695 if (*(unsigned int *)ap->a_data >= NSIG || 696 *(unsigned int *)ap->a_data == 0) 697 return(EINVAL); 698 if ((tp->t_lflag&NOFLSH) == 0) 699 ttyflush(tp, FREAD|FWRITE); 700 pgsignal(tp->t_pgrp, *(unsigned int *)ap->a_data, 1); 701 if ((*(unsigned int *)ap->a_data == SIGINFO) && 702 ((tp->t_lflag&NOKERNINFO) == 0)) 703 ttyinfo(tp); 704 return(0); 705 } 706 } 707 if (ap->a_cmd == TIOCEXT) { 708 /* 709 * When the EXTPROC bit is being toggled, we need 710 * to send an TIOCPKT_IOCTL if the packet driver 711 * is turned on. 712 */ 713 if (*(int *)ap->a_data) { 714 if (pti->pt_flags & PF_PKT) { 715 pti->pt_send |= TIOCPKT_IOCTL; 716 ptcwakeup(tp, FREAD); 717 } 718 tp->t_lflag |= EXTPROC; 719 } else { 720 if ((tp->t_lflag & EXTPROC) && 721 (pti->pt_flags & PF_PKT)) { 722 pti->pt_send |= TIOCPKT_IOCTL; 723 ptcwakeup(tp, FREAD); 724 } 725 tp->t_lflag &= ~EXTPROC; 726 } 727 return(0); 728 } 729 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data, 730 ap->a_fflag, ap->a_cred); 731 if (error == ENOIOCTL) 732 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag); 733 if (error == ENOIOCTL) { 734 if (pti->pt_flags & PF_UCNTL && 735 (ap->a_cmd & ~0xff) == UIOCCMD(0)) { 736 if (ap->a_cmd & 0xff) { 737 pti->pt_ucntl = (u_char)ap->a_cmd; 738 ptcwakeup(tp, FREAD); 739 } 740 return (0); 741 } 742 error = ENOTTY; 743 } 744 /* 745 * If external processing and packet mode send ioctl packet. 746 */ 747 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 748 switch(ap->a_cmd) { 749 case TIOCSETA: 750 case TIOCSETAW: 751 case TIOCSETAF: 752 #ifdef COMPAT_43 753 case TIOCSETP: 754 case TIOCSETN: 755 #endif 756 #if defined(COMPAT_43) || defined(COMPAT_SUNOS) 757 case TIOCSETC: 758 case TIOCSLTC: 759 case TIOCLBIS: 760 case TIOCLBIC: 761 case TIOCLSET: 762 #endif 763 pti->pt_send |= TIOCPKT_IOCTL; 764 ptcwakeup(tp, FREAD); 765 default: 766 break; 767 } 768 } 769 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 770 && CCEQ(cc[VSTART], CTRL('q')); 771 if (pti->pt_flags & PF_NOSTOP) { 772 if (stop) { 773 pti->pt_send &= ~TIOCPKT_NOSTOP; 774 pti->pt_send |= TIOCPKT_DOSTOP; 775 pti->pt_flags &= ~PF_NOSTOP; 776 ptcwakeup(tp, FREAD); 777 } 778 } else { 779 if (!stop) { 780 pti->pt_send &= ~TIOCPKT_DOSTOP; 781 pti->pt_send |= TIOCPKT_NOSTOP; 782 pti->pt_flags |= PF_NOSTOP; 783 ptcwakeup(tp, FREAD); 784 } 785 } 786 return (error); 787 } 788 789 790 static void ptc_drvinit (void *unused); 791 792 static void 793 ptc_drvinit(void *unused) 794 { 795 dev_ops_add(&pts_ops, 0, 0); 796 dev_ops_add(&ptc_ops, 0, 0); 797 /* XXX: Gross hack for DEVFS */ 798 /* XXX: DEVFS is no more, should this be removed? */ 799 ptyinit(0); 800 } 801 802 SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL) 803