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 1.20 2008/01/05 14:02:38 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/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 | M_ZERO); 143 pt->devs = devs = make_dev(&pts_ops, n, 144 0, 0, 0666, "tty%c%r", names[n / 32], n % 32); 145 pt->devc = devc = make_dev(&ptc_ops, n, 146 0, 0, 0666, "pty%c%r", names[n / 32], n % 32); 147 148 devs->si_drv1 = devc->si_drv1 = pt; 149 devs->si_tty = devc->si_tty = &pt->pt_tty; 150 pt->pt_tty.t_dev = devs; 151 ttyregister(&pt->pt_tty); 152 } 153 154 /*ARGSUSED*/ 155 static int 156 ptsopen(struct dev_open_args *ap) 157 { 158 cdev_t dev = ap->a_head.a_dev; 159 struct tty *tp; 160 int error; 161 int minr; 162 #if 0 163 cdev_t nextdev; 164 #endif 165 struct pt_ioctl *pti; 166 167 minr = lminor(dev); 168 #if 0 169 /* 170 * REMOVED gross hack for devfs. also note that makedev() 171 * no longer exists in this form and reference counting makes 172 * this a problem if we don't clean it out later. 173 */ 174 if (minr < 255) { 175 nextdev = make_sub_dev(dev, minr + 1); 176 if (!nextdev->si_drv1) { 177 ptyinit(minr + 1); 178 } 179 } 180 #endif 181 if (!dev->si_drv1) 182 ptyinit(minor(dev)); 183 if (!dev->si_drv1) 184 return(ENXIO); 185 pti = dev->si_drv1; 186 tp = dev->si_tty; 187 if ((tp->t_state & TS_ISOPEN) == 0) { 188 ttychars(tp); /* Set up default chars */ 189 tp->t_iflag = TTYDEF_IFLAG; 190 tp->t_oflag = TTYDEF_OFLAG; 191 tp->t_lflag = TTYDEF_LFLAG; 192 tp->t_cflag = TTYDEF_CFLAG; 193 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 194 } else if ((tp->t_state & TS_XCLUDE) && suser_cred(ap->a_cred, 0)) { 195 return (EBUSY); 196 } else if (pti->pt_prison != ap->a_cred->cr_prison) { 197 return (EBUSY); 198 } 199 if (tp->t_oproc) /* Ctrlr still around. */ 200 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 201 while ((tp->t_state & TS_CARR_ON) == 0) { 202 if (ap->a_oflags & FNONBLOCK) 203 break; 204 error = ttysleep(tp, TSA_CARR_ON(tp), PCATCH, "ptsopn", 0); 205 if (error) 206 return (error); 207 } 208 error = (*linesw[tp->t_line].l_open)(dev, tp); 209 if (error == 0) 210 ptcwakeup(tp, FREAD|FWRITE); 211 return (error); 212 } 213 214 static int 215 ptsclose(struct dev_close_args *ap) 216 { 217 cdev_t dev = ap->a_head.a_dev; 218 struct tty *tp; 219 int err; 220 221 tp = dev->si_tty; 222 err = (*linesw[tp->t_line].l_close)(tp, ap->a_fflag); 223 ptsstop(tp, FREAD|FWRITE); 224 (void) ttyclose(tp); 225 return (err); 226 } 227 228 static int 229 ptsread(struct dev_read_args *ap) 230 { 231 cdev_t dev = ap->a_head.a_dev; 232 struct proc *p = curproc; 233 struct tty *tp = dev->si_tty; 234 struct pt_ioctl *pti = dev->si_drv1; 235 struct lwp *lp; 236 237 int error = 0; 238 239 lp = curthread->td_lwp; 240 241 again: 242 if (pti->pt_flags & PF_REMOTE) { 243 while (isbackground(p, tp)) { 244 if (SIGISMEMBER(p->p_sigignore, SIGTTIN) || 245 SIGISMEMBER(lp->lwp_sigmask, SIGTTIN) || 246 p->p_pgrp->pg_jobc == 0 || p->p_flag & P_PPWAIT) 247 return (EIO); 248 pgsignal(p->p_pgrp, SIGTTIN, 1); 249 error = ttysleep(tp, &lbolt, PCATCH, "ptsbg", 0); 250 if (error) 251 return (error); 252 } 253 if (tp->t_canq.c_cc == 0) { 254 if (ap->a_ioflag & IO_NDELAY) 255 return (EWOULDBLOCK); 256 error = ttysleep(tp, TSA_PTS_READ(tp), PCATCH, 257 "ptsin", 0); 258 if (error) 259 return (error); 260 goto again; 261 } 262 while (tp->t_canq.c_cc > 1 && ap->a_uio->uio_resid > 0) 263 if (ureadc(clist_getc(&tp->t_canq), ap->a_uio) < 0) { 264 error = EFAULT; 265 break; 266 } 267 if (tp->t_canq.c_cc == 1) 268 clist_getc(&tp->t_canq); 269 if (tp->t_canq.c_cc) 270 return (error); 271 } else 272 if (tp->t_oproc) 273 error = (*linesw[tp->t_line].l_read)(tp, ap->a_uio, ap->a_ioflag); 274 ptcwakeup(tp, FWRITE); 275 return (error); 276 } 277 278 /* 279 * Write to pseudo-tty. 280 * Wakeups of controlling tty will happen 281 * indirectly, when tty driver calls ptsstart. 282 */ 283 static int 284 ptswrite(struct dev_write_args *ap) 285 { 286 cdev_t dev = ap->a_head.a_dev; 287 struct tty *tp; 288 289 tp = dev->si_tty; 290 if (tp->t_oproc == 0) 291 return (EIO); 292 return ((*linesw[tp->t_line].l_write)(tp, ap->a_uio, ap->a_ioflag)); 293 } 294 295 /* 296 * Start output on pseudo-tty. 297 * Wake up process selecting or sleeping for input from controlling tty. 298 */ 299 static void 300 ptsstart(struct tty *tp) 301 { 302 struct pt_ioctl *pti = tp->t_dev->si_drv1; 303 304 if (tp->t_state & TS_TTSTOP) 305 return; 306 if (pti->pt_flags & PF_STOPPED) { 307 pti->pt_flags &= ~PF_STOPPED; 308 pti->pt_send = TIOCPKT_START; 309 } 310 ptcwakeup(tp, FREAD); 311 } 312 313 static void 314 ptcwakeup(struct tty *tp, int flag) 315 { 316 struct pt_ioctl *pti = tp->t_dev->si_drv1; 317 318 if (flag & FREAD) { 319 selwakeup(&pti->pt_selr); 320 wakeup(TSA_PTC_READ(tp)); 321 } 322 if (flag & FWRITE) { 323 selwakeup(&pti->pt_selw); 324 wakeup(TSA_PTC_WRITE(tp)); 325 } 326 } 327 328 static int 329 ptcopen(struct dev_open_args *ap) 330 { 331 cdev_t dev = ap->a_head.a_dev; 332 struct tty *tp; 333 struct pt_ioctl *pti; 334 335 if (!dev->si_drv1) 336 ptyinit(minor(dev)); 337 if (!dev->si_drv1) 338 return(ENXIO); 339 tp = dev->si_tty; 340 if (tp->t_oproc) 341 return (EIO); 342 tp->t_oproc = ptsstart; 343 tp->t_stop = ptsstop; 344 (void)(*linesw[tp->t_line].l_modem)(tp, 1); 345 tp->t_lflag &= ~EXTPROC; 346 pti = dev->si_drv1; 347 pti->pt_prison = ap->a_cred->cr_prison; 348 pti->pt_flags = 0; 349 pti->pt_send = 0; 350 pti->pt_ucntl = 0; 351 return (0); 352 } 353 354 static int 355 ptcclose(struct dev_close_args *ap) 356 { 357 cdev_t dev = ap->a_head.a_dev; 358 struct tty *tp; 359 360 tp = dev->si_tty; 361 (void)(*linesw[tp->t_line].l_modem)(tp, 0); 362 363 /* 364 * XXX MDMBUF makes no sense for ptys but would inhibit the above 365 * l_modem(). CLOCAL makes sense but isn't supported. Special 366 * l_modem()s that ignore carrier drop make no sense for ptys but 367 * may be in use because other parts of the line discipline make 368 * sense for ptys. Recover by doing everything that a normal 369 * ttymodem() would have done except for sending a SIGHUP. 370 */ 371 if (tp->t_state & TS_ISOPEN) { 372 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 373 tp->t_state |= TS_ZOMBIE; 374 ttyflush(tp, FREAD | FWRITE); 375 } 376 377 tp->t_oproc = 0; /* mark closed */ 378 return (0); 379 } 380 381 static int 382 ptcread(struct dev_read_args *ap) 383 { 384 cdev_t dev = ap->a_head.a_dev; 385 struct tty *tp = dev->si_tty; 386 struct pt_ioctl *pti = dev->si_drv1; 387 char buf[BUFSIZ]; 388 int error = 0, cc; 389 390 /* 391 * We want to block until the slave 392 * is open, and there's something to read; 393 * but if we lost the slave or we're NBIO, 394 * then return the appropriate error instead. 395 */ 396 for (;;) { 397 if (tp->t_state&TS_ISOPEN) { 398 if (pti->pt_flags&PF_PKT && pti->pt_send) { 399 error = ureadc((int)pti->pt_send, ap->a_uio); 400 if (error) 401 return (error); 402 if (pti->pt_send & TIOCPKT_IOCTL) { 403 cc = min(ap->a_uio->uio_resid, 404 sizeof(tp->t_termios)); 405 uiomove((caddr_t)&tp->t_termios, cc, 406 ap->a_uio); 407 } 408 pti->pt_send = 0; 409 return (0); 410 } 411 if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 412 error = ureadc((int)pti->pt_ucntl, ap->a_uio); 413 if (error) 414 return (error); 415 pti->pt_ucntl = 0; 416 return (0); 417 } 418 if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 419 break; 420 } 421 if ((tp->t_state & TS_CONNECTED) == 0) 422 return (0); /* EOF */ 423 if (ap->a_ioflag & IO_NDELAY) 424 return (EWOULDBLOCK); 425 error = tsleep(TSA_PTC_READ(tp), PCATCH, "ptcin", 0); 426 if (error) 427 return (error); 428 } 429 if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 430 error = ureadc(0, ap->a_uio); 431 while (ap->a_uio->uio_resid > 0 && error == 0) { 432 cc = q_to_b(&tp->t_outq, buf, min(ap->a_uio->uio_resid, BUFSIZ)); 433 if (cc <= 0) 434 break; 435 error = uiomove(buf, cc, ap->a_uio); 436 } 437 ttwwakeup(tp); 438 return (error); 439 } 440 441 static void 442 ptsstop(struct tty *tp, int flush) 443 { 444 struct pt_ioctl *pti = tp->t_dev->si_drv1; 445 int flag; 446 447 /* note: FLUSHREAD and FLUSHWRITE already ok */ 448 if (flush == 0) { 449 flush = TIOCPKT_STOP; 450 pti->pt_flags |= PF_STOPPED; 451 } else 452 pti->pt_flags &= ~PF_STOPPED; 453 pti->pt_send |= flush; 454 /* change of perspective */ 455 flag = 0; 456 if (flush & FREAD) 457 flag |= FWRITE; 458 if (flush & FWRITE) 459 flag |= FREAD; 460 ptcwakeup(tp, flag); 461 } 462 463 static int 464 ptcpoll(struct dev_poll_args *ap) 465 { 466 cdev_t dev = ap->a_head.a_dev; 467 struct tty *tp = dev->si_tty; 468 struct pt_ioctl *pti = dev->si_drv1; 469 int revents = 0; 470 471 if ((tp->t_state & TS_CONNECTED) == 0) { 472 ap->a_events = seltrue(dev, ap->a_events) | POLLHUP; 473 return(0); 474 } 475 476 /* 477 * Need to block timeouts (ttrstart). 478 */ 479 crit_enter(); 480 481 if (ap->a_events & (POLLIN | POLLRDNORM)) 482 if ((tp->t_state & TS_ISOPEN) && 483 ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 484 ((pti->pt_flags & PF_PKT) && pti->pt_send) || 485 ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 486 revents |= ap->a_events & (POLLIN | POLLRDNORM); 487 488 if (ap->a_events & (POLLOUT | POLLWRNORM)) 489 if (tp->t_state & TS_ISOPEN && 490 ((pti->pt_flags & PF_REMOTE) ? 491 (tp->t_canq.c_cc == 0) : 492 ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 493 (tp->t_canq.c_cc == 0 && (tp->t_lflag & ICANON))))) 494 revents |= ap->a_events & (POLLOUT | POLLWRNORM); 495 496 if (ap->a_events & POLLHUP) 497 if ((tp->t_state & TS_CARR_ON) == 0) 498 revents |= POLLHUP; 499 500 if (revents == 0) { 501 if (ap->a_events & (POLLIN | POLLRDNORM)) 502 selrecord(curthread, &pti->pt_selr); 503 504 if (ap->a_events & (POLLOUT | POLLWRNORM)) 505 selrecord(curthread, &pti->pt_selw); 506 } 507 crit_exit(); 508 509 ap->a_events = revents; 510 return (0); 511 } 512 513 static int 514 ptcwrite(struct dev_write_args *ap) 515 { 516 cdev_t dev = ap->a_head.a_dev; 517 struct tty *tp = dev->si_tty; 518 u_char *cp = 0; 519 int cc = 0; 520 u_char locbuf[BUFSIZ]; 521 int cnt = 0; 522 struct pt_ioctl *pti = dev->si_drv1; 523 int error = 0; 524 525 again: 526 if ((tp->t_state&TS_ISOPEN) == 0) 527 goto block; 528 if (pti->pt_flags & PF_REMOTE) { 529 if (tp->t_canq.c_cc) 530 goto block; 531 while ((ap->a_uio->uio_resid > 0 || cc > 0) && 532 tp->t_canq.c_cc < TTYHOG - 1) { 533 if (cc == 0) { 534 cc = min(ap->a_uio->uio_resid, BUFSIZ); 535 cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 536 cp = locbuf; 537 error = uiomove((caddr_t)cp, cc, ap->a_uio); 538 if (error) 539 return (error); 540 /* check again for safety */ 541 if ((tp->t_state & TS_ISOPEN) == 0) { 542 /* adjust as usual */ 543 ap->a_uio->uio_resid += cc; 544 return (EIO); 545 } 546 } 547 if (cc > 0) { 548 cc = b_to_q((char *)cp, cc, &tp->t_canq); 549 /* 550 * XXX we don't guarantee that the canq size 551 * is >= TTYHOG, so the above b_to_q() may 552 * leave some bytes uncopied. However, space 553 * is guaranteed for the null terminator if 554 * we don't fail here since (TTYHOG - 1) is 555 * not a multiple of CBSIZE. 556 */ 557 if (cc > 0) 558 break; 559 } 560 } 561 /* adjust for data copied in but not written */ 562 ap->a_uio->uio_resid += cc; 563 clist_putc(0, &tp->t_canq); 564 ttwakeup(tp); 565 wakeup(TSA_PTS_READ(tp)); 566 return (0); 567 } 568 while (ap->a_uio->uio_resid > 0 || cc > 0) { 569 if (cc == 0) { 570 cc = min(ap->a_uio->uio_resid, BUFSIZ); 571 cp = locbuf; 572 error = uiomove((caddr_t)cp, cc, ap->a_uio); 573 if (error) 574 return (error); 575 /* check again for safety */ 576 if ((tp->t_state & TS_ISOPEN) == 0) { 577 /* adjust for data copied in but not written */ 578 ap->a_uio->uio_resid += cc; 579 return (EIO); 580 } 581 } 582 while (cc > 0) { 583 if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 584 (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) { 585 wakeup(TSA_HUP_OR_INPUT(tp)); 586 goto block; 587 } 588 (*linesw[tp->t_line].l_rint)(*cp++, tp); 589 cnt++; 590 cc--; 591 } 592 cc = 0; 593 } 594 return (0); 595 block: 596 /* 597 * Come here to wait for slave to open, for space 598 * in outq, or space in rawq, or an empty canq. 599 */ 600 if ((tp->t_state & TS_CONNECTED) == 0) { 601 /* adjust for data copied in but not written */ 602 ap->a_uio->uio_resid += cc; 603 return (EIO); 604 } 605 if (ap->a_ioflag & IO_NDELAY) { 606 /* adjust for data copied in but not written */ 607 ap->a_uio->uio_resid += cc; 608 if (cnt == 0) 609 return (EWOULDBLOCK); 610 return (0); 611 } 612 error = tsleep(TSA_PTC_WRITE(tp), PCATCH, "ptcout", 0); 613 if (error) { 614 /* adjust for data copied in but not written */ 615 ap->a_uio->uio_resid += cc; 616 return (error); 617 } 618 goto again; 619 } 620 621 /*ARGSUSED*/ 622 static int 623 ptyioctl(struct dev_ioctl_args *ap) 624 { 625 cdev_t dev = ap->a_head.a_dev; 626 struct tty *tp = dev->si_tty; 627 struct pt_ioctl *pti = dev->si_drv1; 628 u_char *cc = tp->t_cc; 629 int stop, error; 630 631 if (dev_dflags(dev) & D_MASTER) { 632 switch (ap->a_cmd) { 633 634 case TIOCGPGRP: 635 /* 636 * We avoid calling ttioctl on the controller since, 637 * in that case, tp must be the controlling terminal. 638 */ 639 *(int *)ap->a_data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 640 return (0); 641 642 case TIOCPKT: 643 if (*(int *)ap->a_data) { 644 if (pti->pt_flags & PF_UCNTL) 645 return (EINVAL); 646 pti->pt_flags |= PF_PKT; 647 } else 648 pti->pt_flags &= ~PF_PKT; 649 return (0); 650 651 case TIOCUCNTL: 652 if (*(int *)ap->a_data) { 653 if (pti->pt_flags & PF_PKT) 654 return (EINVAL); 655 pti->pt_flags |= PF_UCNTL; 656 } else 657 pti->pt_flags &= ~PF_UCNTL; 658 return (0); 659 660 case TIOCREMOTE: 661 if (*(int *)ap->a_data) 662 pti->pt_flags |= PF_REMOTE; 663 else 664 pti->pt_flags &= ~PF_REMOTE; 665 ttyflush(tp, FREAD|FWRITE); 666 return (0); 667 } 668 669 /* 670 * The rest of the ioctls shouldn't be called until 671 * the slave is open. 672 */ 673 if ((tp->t_state & TS_ISOPEN) == 0) 674 return (EAGAIN); 675 676 switch (ap->a_cmd) { 677 #ifdef COMPAT_43 678 case TIOCSETP: 679 case TIOCSETN: 680 #endif 681 case TIOCSETD: 682 case TIOCSETA: 683 case TIOCSETAW: 684 case TIOCSETAF: 685 /* 686 * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 687 * ttywflush(tp) will hang if there are characters in 688 * the outq. 689 */ 690 ndflush(&tp->t_outq, tp->t_outq.c_cc); 691 break; 692 693 case TIOCSIG: 694 if (*(unsigned int *)ap->a_data >= NSIG || 695 *(unsigned int *)ap->a_data == 0) 696 return(EINVAL); 697 if ((tp->t_lflag&NOFLSH) == 0) 698 ttyflush(tp, FREAD|FWRITE); 699 pgsignal(tp->t_pgrp, *(unsigned int *)ap->a_data, 1); 700 if ((*(unsigned int *)ap->a_data == SIGINFO) && 701 ((tp->t_lflag&NOKERNINFO) == 0)) 702 ttyinfo(tp); 703 return(0); 704 } 705 } 706 if (ap->a_cmd == TIOCEXT) { 707 /* 708 * When the EXTPROC bit is being toggled, we need 709 * to send an TIOCPKT_IOCTL if the packet driver 710 * is turned on. 711 */ 712 if (*(int *)ap->a_data) { 713 if (pti->pt_flags & PF_PKT) { 714 pti->pt_send |= TIOCPKT_IOCTL; 715 ptcwakeup(tp, FREAD); 716 } 717 tp->t_lflag |= EXTPROC; 718 } else { 719 if ((tp->t_lflag & EXTPROC) && 720 (pti->pt_flags & PF_PKT)) { 721 pti->pt_send |= TIOCPKT_IOCTL; 722 ptcwakeup(tp, FREAD); 723 } 724 tp->t_lflag &= ~EXTPROC; 725 } 726 return(0); 727 } 728 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data, 729 ap->a_fflag, ap->a_cred); 730 if (error == ENOIOCTL) 731 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag); 732 if (error == ENOIOCTL) { 733 if (pti->pt_flags & PF_UCNTL && 734 (ap->a_cmd & ~0xff) == UIOCCMD(0)) { 735 if (ap->a_cmd & 0xff) { 736 pti->pt_ucntl = (u_char)ap->a_cmd; 737 ptcwakeup(tp, FREAD); 738 } 739 return (0); 740 } 741 error = ENOTTY; 742 } 743 /* 744 * If external processing and packet mode send ioctl packet. 745 */ 746 if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 747 switch(ap->a_cmd) { 748 case TIOCSETA: 749 case TIOCSETAW: 750 case TIOCSETAF: 751 #ifdef COMPAT_43 752 case TIOCSETP: 753 case TIOCSETN: 754 #endif 755 #if defined(COMPAT_43) || defined(COMPAT_SUNOS) 756 case TIOCSETC: 757 case TIOCSLTC: 758 case TIOCLBIS: 759 case TIOCLBIC: 760 case TIOCLSET: 761 #endif 762 pti->pt_send |= TIOCPKT_IOCTL; 763 ptcwakeup(tp, FREAD); 764 default: 765 break; 766 } 767 } 768 stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 769 && CCEQ(cc[VSTART], CTRL('q')); 770 if (pti->pt_flags & PF_NOSTOP) { 771 if (stop) { 772 pti->pt_send &= ~TIOCPKT_NOSTOP; 773 pti->pt_send |= TIOCPKT_DOSTOP; 774 pti->pt_flags &= ~PF_NOSTOP; 775 ptcwakeup(tp, FREAD); 776 } 777 } else { 778 if (!stop) { 779 pti->pt_send &= ~TIOCPKT_DOSTOP; 780 pti->pt_send |= TIOCPKT_NOSTOP; 781 pti->pt_flags |= PF_NOSTOP; 782 ptcwakeup(tp, FREAD); 783 } 784 } 785 return (error); 786 } 787 788 789 static void ptc_drvinit (void *unused); 790 791 static void 792 ptc_drvinit(void *unused) 793 { 794 dev_ops_add(&pts_ops, 0, 0); 795 dev_ops_add(&ptc_ops, 0, 0); 796 /* XXX: Gross hack for DEVFS */ 797 /* XXX: DEVFS is no more, should this be removed? */ 798 ptyinit(0); 799 } 800 801 SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL) 802