1 /* tty.c 6.15 85/04/17 */ 2 3 #include "../machine/reg.h" 4 5 #include "param.h" 6 #include "systm.h" 7 #include "dir.h" 8 #include "user.h" 9 #include "ioctl.h" 10 #include "tty.h" 11 #include "proc.h" 12 #include "inode.h" 13 #include "file.h" 14 #include "conf.h" 15 #include "buf.h" 16 #include "dk.h" 17 #include "uio.h" 18 #include "kernel.h" 19 20 /* 21 * Table giving parity for characters and indicating 22 * character classes to tty driver. In particular, 23 * if the low 6 bits are 0, then the character needs 24 * no special processing on output. 25 */ 26 27 char partab[] = { 28 0001,0201,0201,0001,0201,0001,0001,0201, 29 0202,0004,0003,0201,0005,0206,0201,0001, 30 0201,0001,0001,0201,0001,0201,0201,0001, 31 0001,0201,0201,0001,0201,0001,0001,0201, 32 0200,0000,0000,0200,0000,0200,0200,0000, 33 0000,0200,0200,0000,0200,0000,0000,0200, 34 0000,0200,0200,0000,0200,0000,0000,0200, 35 0200,0000,0000,0200,0000,0200,0200,0000, 36 0200,0000,0000,0200,0000,0200,0200,0000, 37 0000,0200,0200,0000,0200,0000,0000,0200, 38 0000,0200,0200,0000,0200,0000,0000,0200, 39 0200,0000,0000,0200,0000,0200,0200,0000, 40 0000,0200,0200,0000,0200,0000,0000,0200, 41 0200,0000,0000,0200,0000,0200,0200,0000, 42 0200,0000,0000,0200,0000,0200,0200,0000, 43 0000,0200,0200,0000,0200,0000,0000,0201, 44 45 /* 46 * 7 bit ascii ends with the last character above, 47 * but we contine through all 256 codes for the sake 48 * of the tty output routines which use special vax 49 * instructions which need a 256 character trt table. 50 */ 51 52 0007,0007,0007,0007,0007,0007,0007,0007, 53 0007,0007,0007,0007,0007,0007,0007,0007, 54 0007,0007,0007,0007,0007,0007,0007,0007, 55 0007,0007,0007,0007,0007,0007,0007,0007, 56 0007,0007,0007,0007,0007,0007,0007,0007, 57 0007,0007,0007,0007,0007,0007,0007,0007, 58 0007,0007,0007,0007,0007,0007,0007,0007, 59 0007,0007,0007,0007,0007,0007,0007,0007, 60 0007,0007,0007,0007,0007,0007,0007,0007, 61 0007,0007,0007,0007,0007,0007,0007,0007, 62 0007,0007,0007,0007,0007,0007,0007,0007, 63 0007,0007,0007,0007,0007,0007,0007,0007, 64 0007,0007,0007,0007,0007,0007,0007,0007, 65 0007,0007,0007,0007,0007,0007,0007,0007, 66 0007,0007,0007,0007,0007,0007,0007,0007, 67 0007,0007,0007,0007,0007,0007,0007,0007 68 }; 69 70 /* 71 * Input mapping table-- if an entry is non-zero, when the 72 * corresponding character is typed preceded by "\" the escape 73 * sequence is replaced by the table value. Mostly used for 74 * upper-case only terminals. 75 */ 76 char maptab[] ={ 77 000,000,000,000,000,000,000,000, 78 000,000,000,000,000,000,000,000, 79 000,000,000,000,000,000,000,000, 80 000,000,000,000,000,000,000,000, 81 000,'|',000,000,000,000,000,'`', 82 '{','}',000,000,000,000,000,000, 83 000,000,000,000,000,000,000,000, 84 000,000,000,000,000,000,000,000, 85 000,000,000,000,000,000,000,000, 86 000,000,000,000,000,000,000,000, 87 000,000,000,000,000,000,000,000, 88 000,000,000,000,000,000,'~',000, 89 000,'A','B','C','D','E','F','G', 90 'H','I','J','K','L','M','N','O', 91 'P','Q','R','S','T','U','V','W', 92 'X','Y','Z',000,000,000,000,000, 93 }; 94 95 short tthiwat[16] = 96 { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,1300,2000 }; 97 short ttlowat[16] = 98 { 30, 30, 30, 30, 30, 30, 30, 50, 50,120,120,120,125,125,125,125 }; 99 100 struct ttychars ttydefaults = { 101 CERASE, CKILL, CINTR, CQUIT, CSTART, CSTOP, CEOF, 102 CBRK, CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE,CLNEXT 103 }; 104 105 ttychars(tp) 106 struct tty *tp; 107 { 108 109 tp->t_chars = ttydefaults; 110 } 111 112 /* 113 * Wait for output to drain, then flush input waiting. 114 */ 115 ttywflush(tp) 116 register struct tty *tp; 117 { 118 119 ttywait(tp); 120 ttyflush(tp, FREAD); 121 } 122 123 ttywait(tp) 124 register struct tty *tp; 125 { 126 register int s = spltty(); 127 128 while ((tp->t_outq.c_cc || tp->t_state&TS_BUSY) && 129 tp->t_state&TS_CARR_ON && tp->t_oproc) { /* kludge for pty */ 130 (*tp->t_oproc)(tp); 131 tp->t_state |= TS_ASLEEP; 132 sleep((caddr_t)&tp->t_outq, TTOPRI); 133 } 134 splx(s); 135 } 136 137 /* 138 * Flush all TTY queues 139 */ 140 ttyflush(tp, rw) 141 register struct tty *tp; 142 { 143 register s; 144 145 s = spltty(); 146 if (rw & FREAD) { 147 while (getc(&tp->t_canq) >= 0) 148 ; 149 wakeup((caddr_t)&tp->t_rawq); 150 } 151 if (rw & FWRITE) { 152 wakeup((caddr_t)&tp->t_outq); 153 tp->t_state &= ~TS_TTSTOP; 154 (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw); 155 while (getc(&tp->t_outq) >= 0) 156 ; 157 } 158 if (rw & FREAD) { 159 while (getc(&tp->t_rawq) >= 0) 160 ; 161 tp->t_rocount = 0; 162 tp->t_rocol = 0; 163 tp->t_state &= ~TS_LOCAL; 164 } 165 splx(s); 166 } 167 168 /* 169 * Send stop character on input overflow. 170 */ 171 ttyblock(tp) 172 register struct tty *tp; 173 { 174 register x; 175 176 x = tp->t_rawq.c_cc + tp->t_canq.c_cc; 177 if (tp->t_rawq.c_cc > TTYHOG) { 178 ttyflush(tp, FREAD|FWRITE); 179 tp->t_state &= ~TS_TBLOCK; 180 } 181 /* 182 * Block further input iff: 183 * Current input > threshold AND input is available to user program 184 */ 185 if (x >= TTYHOG/2 && 186 ((tp->t_flags & (RAW|CBREAK)) || (tp->t_canq.c_cc > 0))) { 187 if (putc(tp->t_stopc, &tp->t_outq)==0) { 188 tp->t_state |= TS_TBLOCK; 189 ttstart(tp); 190 } 191 } 192 } 193 194 /* 195 * Restart typewriter output following a delay 196 * timeout. 197 * The name of the routine is passed to the timeout 198 * subroutine and it is called during a clock interrupt. 199 */ 200 ttrstrt(tp) 201 register struct tty *tp; 202 { 203 204 if (tp == 0) 205 panic("ttrstrt"); 206 tp->t_state &= ~TS_TIMEOUT; 207 ttstart(tp); 208 } 209 210 /* 211 * Start output on the typewriter. It is used from the top half 212 * after some characters have been put on the output queue, 213 * from the interrupt routine to transmit the next 214 * character, and after a timeout has finished. 215 */ 216 ttstart(tp) 217 register struct tty *tp; 218 { 219 register s; 220 221 s = spltty(); 222 if ((tp->t_state & (TS_TIMEOUT|TS_TTSTOP|TS_BUSY)) == 0 && 223 tp->t_oproc) /* kludge for pty */ 224 (*tp->t_oproc)(tp); 225 splx(s); 226 } 227 228 /* 229 * Common code for tty ioctls. 230 */ 231 /*ARGSUSED*/ 232 ttioctl(tp, com, data, flag) 233 register struct tty *tp; 234 caddr_t data; 235 { 236 int dev = tp->t_dev; 237 extern int nldisp; 238 int s; 239 register int newflags; 240 241 /* 242 * If the ioctl involves modification, 243 * hang if in the background. 244 */ 245 switch (com) { 246 247 case TIOCSETD: 248 case TIOCSETP: 249 case TIOCSETN: 250 case TIOCFLUSH: 251 case TIOCSETC: 252 case TIOCSLTC: 253 case TIOCSPGRP: 254 case TIOCLBIS: 255 case TIOCLBIC: 256 case TIOCLSET: 257 case TIOCSTI: 258 case TIOCSWINSZ: 259 #define bit(a) (1<<(a-1)) 260 while (tp->t_line == NTTYDISC && 261 u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && 262 (u.u_procp->p_flag&SVFORK) == 0 && 263 !(u.u_procp->p_sigignore & bit(SIGTTOU)) && 264 !(u.u_procp->p_sigmask & bit(SIGTTOU))) { 265 gsignal(u.u_procp->p_pgrp, SIGTTOU); 266 sleep((caddr_t)&lbolt, TTOPRI); 267 } 268 break; 269 } 270 #undef bit 271 272 /* 273 * Process the ioctl. 274 */ 275 switch (com) { 276 277 /* get discipline number */ 278 case TIOCGETD: 279 *(int *)data = tp->t_line; 280 break; 281 282 /* set line discipline */ 283 case TIOCSETD: { 284 register int t = *(int *)data; 285 int error = 0; 286 287 if ((unsigned) t >= nldisp) 288 return (ENXIO); 289 s = spltty(); 290 if (tp->t_line) 291 (*linesw[tp->t_line].l_close)(tp); 292 if (t) 293 error = (*linesw[t].l_open)(dev, tp); 294 if (error) { 295 if (tp->t_line) 296 (void) (*linesw[tp->t_line].l_open)(dev, tp); 297 splx(s); 298 return (error); 299 } 300 tp->t_line = t; 301 splx(s); 302 break; 303 } 304 305 /* prevent more opens on channel */ 306 case TIOCEXCL: 307 tp->t_state |= TS_XCLUDE; 308 break; 309 310 case TIOCNXCL: 311 tp->t_state &= ~TS_XCLUDE; 312 break; 313 314 /* hang up line on last close */ 315 case TIOCHPCL: 316 tp->t_state |= TS_HUPCLS; 317 break; 318 319 case TIOCFLUSH: { 320 register int flags = *(int *)data; 321 322 if (flags == 0) 323 flags = FREAD|FWRITE; 324 else 325 flags &= FREAD|FWRITE; 326 ttyflush(tp, flags); 327 break; 328 } 329 330 /* return number of characters immediately available */ 331 case FIONREAD: 332 *(off_t *)data = ttnread(tp); 333 break; 334 335 case TIOCOUTQ: 336 *(int *)data = tp->t_outq.c_cc; 337 break; 338 339 case TIOCSTOP: 340 s = spltty(); 341 if ((tp->t_state&TS_TTSTOP) == 0) { 342 tp->t_state |= TS_TTSTOP; 343 (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); 344 } 345 splx(s); 346 break; 347 348 case TIOCSTART: 349 s = spltty(); 350 if ((tp->t_state&TS_TTSTOP) || (tp->t_flags&FLUSHO)) { 351 tp->t_state &= ~TS_TTSTOP; 352 tp->t_flags &= ~FLUSHO; 353 ttstart(tp); 354 } 355 splx(s); 356 break; 357 358 /* 359 * Simulate typing of a character at the terminal. 360 */ 361 case TIOCSTI: 362 if (u.u_uid && (flag & FREAD) == 0) 363 return (EPERM); 364 if (u.u_uid && u.u_ttyp != tp) 365 return (EACCES); 366 (*linesw[tp->t_line].l_rint)(*(char *)data, tp); 367 break; 368 369 case TIOCSETP: 370 case TIOCSETN: { 371 register struct sgttyb *sg = (struct sgttyb *)data; 372 373 tp->t_erase = sg->sg_erase; 374 tp->t_kill = sg->sg_kill; 375 tp->t_ispeed = sg->sg_ispeed; 376 tp->t_ospeed = sg->sg_ospeed; 377 newflags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff); 378 s = spltty(); 379 if (tp->t_flags&RAW || newflags&RAW || com == TIOCSETP) { 380 ttywait(tp); 381 ttyflush(tp, FREAD); 382 } else if ((tp->t_flags&CBREAK) != (newflags&CBREAK)) { 383 if (newflags&CBREAK) { 384 struct clist tq; 385 386 catq(&tp->t_rawq, &tp->t_canq); 387 tq = tp->t_rawq; 388 tp->t_rawq = tp->t_canq; 389 tp->t_canq = tq; 390 } else { 391 tp->t_flags |= PENDIN; 392 newflags |= PENDIN; 393 ttwakeup(tp); 394 } 395 } 396 tp->t_flags = newflags; 397 if (tp->t_flags&RAW) { 398 tp->t_state &= ~TS_TTSTOP; 399 ttstart(tp); 400 } 401 splx(s); 402 break; 403 } 404 405 /* send current parameters to user */ 406 case TIOCGETP: { 407 register struct sgttyb *sg = (struct sgttyb *)data; 408 409 sg->sg_ispeed = tp->t_ispeed; 410 sg->sg_ospeed = tp->t_ospeed; 411 sg->sg_erase = tp->t_erase; 412 sg->sg_kill = tp->t_kill; 413 sg->sg_flags = tp->t_flags; 414 break; 415 } 416 417 case FIONBIO: 418 if (*(int *)data) 419 tp->t_state |= TS_NBIO; 420 else 421 tp->t_state &= ~TS_NBIO; 422 break; 423 424 case FIOASYNC: 425 if (*(int *)data) 426 tp->t_state |= TS_ASYNC; 427 else 428 tp->t_state &= ~TS_ASYNC; 429 break; 430 431 case TIOCGETC: 432 bcopy((caddr_t)&tp->t_intrc, data, sizeof (struct tchars)); 433 break; 434 435 case TIOCSETC: 436 bcopy(data, (caddr_t)&tp->t_intrc, sizeof (struct tchars)); 437 break; 438 439 /* set/get local special characters */ 440 case TIOCSLTC: 441 bcopy(data, (caddr_t)&tp->t_suspc, sizeof (struct ltchars)); 442 break; 443 444 case TIOCGLTC: 445 bcopy((caddr_t)&tp->t_suspc, data, sizeof (struct ltchars)); 446 break; 447 448 /* 449 * Modify local mode word. 450 */ 451 case TIOCLBIS: 452 tp->t_flags |= *(int *)data << 16; 453 break; 454 455 case TIOCLBIC: 456 tp->t_flags &= ~(*(int *)data << 16); 457 break; 458 459 case TIOCLSET: 460 tp->t_flags &= 0xffff; 461 tp->t_flags |= *(int *)data << 16; 462 break; 463 464 case TIOCLGET: 465 *(int *)data = ((unsigned) tp->t_flags) >> 16; 466 break; 467 468 /* 469 * Allow SPGRP only if tty is open for reading. 470 * Quick check: if we can find a process in the new pgrp, 471 * this user must own that process. 472 * SHOULD VERIFY THAT PGRP IS IN USE AND IS THIS USER'S. 473 */ 474 case TIOCSPGRP: { 475 struct proc *p; 476 int pgrp = *(int *)data; 477 478 if (u.u_uid && (flag & FREAD) == 0) 479 return (EPERM); 480 p = pfind(pgrp); 481 if (p && p->p_pgrp == pgrp && 482 p->p_uid != u.u_uid && u.u_uid && !inferior(p)) 483 return (EPERM); 484 tp->t_pgrp = pgrp; 485 break; 486 } 487 488 case TIOCGPGRP: 489 *(int *)data = tp->t_pgrp; 490 break; 491 492 case TIOCSWINSZ: 493 if (bcmp((caddr_t)&tp->t_winsize, data, 494 sizeof (struct winsize))) { 495 tp->t_winsize = *(struct winsize *)data; 496 gsignal(tp->t_pgrp, SIGWINCH); 497 } 498 break; 499 500 case TIOCGWINSZ: 501 *(struct winsize *)data = tp->t_winsize; 502 break; 503 504 default: 505 return (-1); 506 } 507 return (0); 508 } 509 510 ttnread(tp) 511 struct tty *tp; 512 { 513 int nread = 0; 514 515 if (tp->t_flags & PENDIN) 516 ttypend(tp); 517 nread = tp->t_canq.c_cc; 518 if (tp->t_flags & (RAW|CBREAK)) 519 nread += tp->t_rawq.c_cc; 520 return (nread); 521 } 522 523 ttselect(dev, rw) 524 dev_t dev; 525 int rw; 526 { 527 register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; 528 int nread; 529 int s = spltty(); 530 531 switch (rw) { 532 533 case FREAD: 534 nread = ttnread(tp); 535 if (nread > 0) 536 goto win; 537 if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait) 538 tp->t_state |= TS_RCOLL; 539 else 540 tp->t_rsel = u.u_procp; 541 break; 542 543 case FWRITE: 544 if (tp->t_outq.c_cc <= TTLOWAT(tp)) 545 goto win; 546 if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait) 547 tp->t_state |= TS_WCOLL; 548 else 549 tp->t_wsel = u.u_procp; 550 break; 551 } 552 splx(s); 553 return (0); 554 win: 555 splx(s); 556 return (1); 557 } 558 559 /* 560 * Establish a process group for distribution of 561 * quits and interrupts from the tty. 562 */ 563 ttyopen(dev, tp) 564 dev_t dev; 565 register struct tty *tp; 566 { 567 register struct proc *pp; 568 569 pp = u.u_procp; 570 tp->t_dev = dev; 571 if (pp->p_pgrp == 0) { 572 u.u_ttyp = tp; 573 u.u_ttyd = dev; 574 if (tp->t_pgrp == 0) 575 tp->t_pgrp = pp->p_pid; 576 pp->p_pgrp = tp->t_pgrp; 577 } 578 tp->t_state &= ~TS_WOPEN; 579 if ((tp->t_state & TS_ISOPEN) == 0) { 580 tp->t_state |= TS_ISOPEN; 581 bzero((caddr_t)&tp->t_winsize, sizeof(tp->t_winsize)); 582 if (tp->t_line != NTTYDISC) 583 ttywflush(tp); 584 } 585 return (0); 586 } 587 588 /* 589 * clean tp on last close 590 */ 591 ttyclose(tp) 592 register struct tty *tp; 593 { 594 595 if (tp->t_line) { 596 ttywflush(tp); 597 tp->t_line = 0; 598 return; 599 } 600 tp->t_pgrp = 0; 601 ttywflush(tp); 602 tp->t_state = 0; 603 } 604 605 /* 606 * reinput pending characters after state switch 607 * call at spltty(). 608 */ 609 ttypend(tp) 610 register struct tty *tp; 611 { 612 struct clist tq; 613 register c; 614 615 tp->t_flags &= ~PENDIN; 616 tp->t_state |= TS_TYPEN; 617 tq = tp->t_rawq; 618 tp->t_rawq.c_cc = 0; 619 tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; 620 while ((c = getc(&tq)) >= 0) 621 ttyinput(c, tp); 622 tp->t_state &= ~TS_TYPEN; 623 } 624 625 /* 626 * Place a character on raw TTY input queue, 627 * putting in delimiters and waking up top 628 * half as needed. Also echo if required. 629 * The arguments are the character and the 630 * appropriate tty structure. 631 */ 632 ttyinput(c, tp) 633 register c; 634 register struct tty *tp; 635 { 636 register int t_flags = tp->t_flags; 637 int i; 638 639 /* 640 * If input is pending take it first. 641 */ 642 if (t_flags&PENDIN) 643 ttypend(tp); 644 tk_nin++; 645 c &= 0377; 646 647 /* 648 * In tandem mode, check high water mark. 649 */ 650 if (t_flags&TANDEM) 651 ttyblock(tp); 652 653 if (t_flags&RAW) { 654 /* 655 * Raw mode, just put character 656 * in input q w/o interpretation. 657 */ 658 if (tp->t_rawq.c_cc > TTYHOG) 659 ttyflush(tp, FREAD|FWRITE); 660 else { 661 if (putc(c, &tp->t_rawq) >= 0) 662 ttwakeup(tp); 663 ttyecho(c, tp); 664 } 665 goto endcase; 666 } 667 668 /* 669 * Ignore any high bit added during 670 * previous ttyinput processing. 671 */ 672 if ((tp->t_state&TS_TYPEN) == 0) 673 c &= 0177; 674 /* 675 * Check for literal nexting very first 676 */ 677 if (tp->t_state&TS_LNCH) { 678 c |= 0200; 679 tp->t_state &= ~TS_LNCH; 680 } 681 682 /* 683 * Scan for special characters. This code 684 * is really just a big case statement with 685 * non-constant cases. The bottom of the 686 * case statement is labeled ``endcase'', so goto 687 * it after a case match, or similar. 688 */ 689 if (tp->t_line == NTTYDISC) { 690 if (c == tp->t_lnextc) { 691 if (tp->t_flags&ECHO) 692 ttyout("^\b", tp); 693 tp->t_state |= TS_LNCH; 694 goto endcase; 695 } 696 if (c == tp->t_flushc) { 697 if (tp->t_flags&FLUSHO) 698 tp->t_flags &= ~FLUSHO; 699 else { 700 ttyflush(tp, FWRITE); 701 ttyecho(c, tp); 702 if (tp->t_rawq.c_cc + tp->t_canq.c_cc) 703 ttyretype(tp); 704 tp->t_flags |= FLUSHO; 705 } 706 goto startoutput; 707 } 708 if (c == tp->t_suspc) { 709 if ((tp->t_flags&NOFLSH) == 0) 710 ttyflush(tp, FREAD); 711 ttyecho(c, tp); 712 gsignal(tp->t_pgrp, SIGTSTP); 713 goto endcase; 714 } 715 } 716 717 /* 718 * Handle start/stop characters. 719 */ 720 if (c == tp->t_stopc) { 721 if ((tp->t_state&TS_TTSTOP) == 0) { 722 tp->t_state |= TS_TTSTOP; 723 (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); 724 return; 725 } 726 if (c != tp->t_startc) 727 return; 728 goto endcase; 729 } 730 if (c == tp->t_startc) 731 goto restartoutput; 732 733 /* 734 * Look for interrupt/quit chars. 735 */ 736 if (c == tp->t_intrc || c == tp->t_quitc) { 737 if ((tp->t_flags&NOFLSH) == 0) 738 ttyflush(tp, FREAD|FWRITE); 739 ttyecho(c, tp); 740 gsignal(tp->t_pgrp, c == tp->t_intrc ? SIGINT : SIGQUIT); 741 goto endcase; 742 } 743 744 /* 745 * Cbreak mode, don't process line editing 746 * characters; check high water mark for wakeup. 747 */ 748 if (t_flags&CBREAK) { 749 if (tp->t_rawq.c_cc > TTYHOG) { 750 if (tp->t_outq.c_cc < TTHIWAT(tp) && 751 tp->t_line == NTTYDISC) 752 (void) ttyoutput(CTRL(g), tp); 753 } else if (putc(c, &tp->t_rawq) >= 0) { 754 ttwakeup(tp); 755 ttyecho(c, tp); 756 } 757 goto endcase; 758 } 759 760 /* 761 * From here on down cooked mode character 762 * processing takes place. 763 */ 764 if ((tp->t_state&TS_QUOT) && 765 (c == tp->t_erase || c == tp->t_kill)) { 766 ttyrub(unputc(&tp->t_rawq), tp); 767 c |= 0200; 768 } 769 if (c == tp->t_erase) { 770 if (tp->t_rawq.c_cc) 771 ttyrub(unputc(&tp->t_rawq), tp); 772 goto endcase; 773 } 774 if (c == tp->t_kill) { 775 if (tp->t_flags&CRTKIL && 776 tp->t_rawq.c_cc == tp->t_rocount) { 777 while (tp->t_rawq.c_cc) 778 ttyrub(unputc(&tp->t_rawq), tp); 779 } else { 780 ttyecho(c, tp); 781 ttyecho('\n', tp); 782 while (getc(&tp->t_rawq) > 0) 783 ; 784 tp->t_rocount = 0; 785 } 786 tp->t_state &= ~TS_LOCAL; 787 goto endcase; 788 } 789 790 /* 791 * New line discipline, 792 * check word erase/reprint line. 793 */ 794 if (tp->t_line == NTTYDISC) { 795 if (c == tp->t_werasc) { 796 if (tp->t_rawq.c_cc == 0) 797 goto endcase; 798 do { 799 c = unputc(&tp->t_rawq); 800 if (c != ' ' && c != '\t') 801 goto erasenb; 802 ttyrub(c, tp); 803 } while (tp->t_rawq.c_cc); 804 goto endcase; 805 erasenb: 806 do { 807 ttyrub(c, tp); 808 if (tp->t_rawq.c_cc == 0) 809 goto endcase; 810 c = unputc(&tp->t_rawq); 811 } while (c != ' ' && c != '\t'); 812 (void) putc(c, &tp->t_rawq); 813 goto endcase; 814 } 815 if (c == tp->t_rprntc) { 816 ttyretype(tp); 817 goto endcase; 818 } 819 } 820 821 /* 822 * Check for input buffer overflow 823 */ 824 if (tp->t_rawq.c_cc+tp->t_canq.c_cc >= TTYHOG) { 825 if (tp->t_line == NTTYDISC) 826 (void) ttyoutput(CTRL(g), tp); 827 goto endcase; 828 } 829 830 /* 831 * Put data char in q for user and 832 * wakeup on seeing a line delimiter. 833 */ 834 if (putc(c, &tp->t_rawq) >= 0) { 835 if (ttbreakc(c, tp)) { 836 tp->t_rocount = 0; 837 catq(&tp->t_rawq, &tp->t_canq); 838 ttwakeup(tp); 839 } else if (tp->t_rocount++ == 0) 840 tp->t_rocol = tp->t_col; 841 tp->t_state &= ~TS_QUOT; 842 if (c == '\\') 843 tp->t_state |= TS_QUOT; 844 if (tp->t_state&TS_ERASE) { 845 tp->t_state &= ~TS_ERASE; 846 (void) ttyoutput('/', tp); 847 } 848 i = tp->t_col; 849 ttyecho(c, tp); 850 if (c == tp->t_eofc && tp->t_flags&ECHO) { 851 i = MIN(2, tp->t_col - i); 852 while (i > 0) { 853 (void) ttyoutput('\b', tp); 854 i--; 855 } 856 } 857 } 858 endcase: 859 /* 860 * If DEC-style start/stop is enabled don't restart 861 * output until seeing the start character. 862 */ 863 if (tp->t_flags&DECCTQ && tp->t_state&TS_TTSTOP && 864 tp->t_startc != tp->t_stopc) 865 return; 866 restartoutput: 867 tp->t_state &= ~TS_TTSTOP; 868 tp->t_flags &= ~FLUSHO; 869 startoutput: 870 ttstart(tp); 871 } 872 873 /* 874 * Put character on TTY output queue, adding delays, 875 * expanding tabs, and handling the CR/NL bit. 876 * This is called both from the top half for output, 877 * and from interrupt level for echoing. 878 * The arguments are the character and the tty structure. 879 * Returns < 0 if putc succeeds, otherwise returns char to resend 880 * Must be recursive. 881 */ 882 ttyoutput(c, tp) 883 register c; 884 register struct tty *tp; 885 { 886 register char *colp; 887 register ctype; 888 889 if (tp->t_flags & (RAW|LITOUT)) { 890 if (tp->t_flags&FLUSHO) 891 return (-1); 892 if (putc(c, &tp->t_outq)) 893 return (c); 894 tk_nout++; 895 return (-1); 896 } 897 898 /* 899 * Ignore EOT in normal mode to avoid 900 * hanging up certain terminals. 901 */ 902 c &= 0177; 903 if (c == CEOT && (tp->t_flags&CBREAK) == 0) 904 return (-1); 905 /* 906 * Turn tabs to spaces as required 907 */ 908 if (c == '\t' && (tp->t_flags&TBDELAY) == XTABS) { 909 register int s; 910 911 c = 8 - (tp->t_col&7); 912 if ((tp->t_flags&FLUSHO) == 0) { 913 s = spltty(); /* don't interrupt tabs */ 914 c -= b_to_q(" ", c, &tp->t_outq); 915 tk_nout += c; 916 splx(s); 917 } 918 tp->t_col += c; 919 return (c ? -1 : '\t'); 920 } 921 tk_nout++; 922 /* 923 * for upper-case-only terminals, 924 * generate escapes. 925 */ 926 if (tp->t_flags&LCASE) { 927 colp = "({)}!|^~'`"; 928 while (*colp++) 929 if (c == *colp++) { 930 if (ttyoutput('\\', tp) >= 0) 931 return (c); 932 c = colp[-2]; 933 break; 934 } 935 if ('A' <= c && c <= 'Z') { 936 if (ttyoutput('\\', tp) >= 0) 937 return (c); 938 } else if ('a' <= c && c <= 'z') 939 c += 'A' - 'a'; 940 } 941 942 /* 943 * turn <nl> to <cr><lf> if desired. 944 */ 945 if (c == '\n' && tp->t_flags&CRMOD) 946 if (ttyoutput('\r', tp) >= 0) 947 return (c); 948 if (c == '~' && tp->t_flags&TILDE) 949 c = '`'; 950 if ((tp->t_flags&FLUSHO) == 0 && putc(c, &tp->t_outq)) 951 return (c); 952 /* 953 * Calculate delays. 954 * The numbers here represent clock ticks 955 * and are not necessarily optimal for all terminals. 956 * The delays are indicated by characters above 0200. 957 * In raw mode there are no delays and the 958 * transmission path is 8 bits wide. 959 * 960 * SHOULD JUST ALLOW USER TO SPECIFY DELAYS 961 */ 962 colp = &tp->t_col; 963 ctype = partab[c]; 964 c = 0; 965 switch (ctype&077) { 966 967 case ORDINARY: 968 (*colp)++; 969 970 case CONTROL: 971 break; 972 973 case BACKSPACE: 974 if (*colp) 975 (*colp)--; 976 break; 977 978 /* 979 * This macro is close enough to the correct thing; 980 * it should be replaced by real user settable delays 981 * in any event... 982 */ 983 #define mstohz(ms) (((ms) * hz) >> 10) 984 case NEWLINE: 985 ctype = (tp->t_flags >> 8) & 03; 986 if (ctype == 1) { /* tty 37 */ 987 if (*colp > 0) 988 c = max((((unsigned)*colp) >> 4) + 3, 989 (unsigned)6); 990 } else if (ctype == 2) /* vt05 */ 991 c = mstohz(100); 992 *colp = 0; 993 break; 994 995 case TAB: 996 ctype = (tp->t_flags >> 10) & 03; 997 if (ctype == 1) { /* tty 37 */ 998 c = 1 - (*colp | ~07); 999 if (c < 5) 1000 c = 0; 1001 } 1002 *colp |= 07; 1003 (*colp)++; 1004 break; 1005 1006 case VTAB: 1007 if (tp->t_flags&VTDELAY) /* tty 37 */ 1008 c = 0177; 1009 break; 1010 1011 case RETURN: 1012 ctype = (tp->t_flags >> 12) & 03; 1013 if (ctype == 1) /* tn 300 */ 1014 c = mstohz(83); 1015 else if (ctype == 2) /* ti 700 */ 1016 c = mstohz(166); 1017 else if (ctype == 3) { /* concept 100 */ 1018 int i; 1019 1020 if ((i = *colp) >= 0) 1021 for (; i < 9; i++) 1022 (void) putc(0177, &tp->t_outq); 1023 } 1024 *colp = 0; 1025 } 1026 if (c && (tp->t_flags&FLUSHO) == 0) 1027 (void) putc(c|0200, &tp->t_outq); 1028 return (-1); 1029 } 1030 #undef mstohz 1031 1032 /* 1033 * Called from device's read routine after it has 1034 * calculated the tty-structure given as argument. 1035 */ 1036 ttread(tp, uio) 1037 register struct tty *tp; 1038 struct uio *uio; 1039 { 1040 register struct clist *qp; 1041 register c, t_flags; 1042 int s, first, error = 0; 1043 1044 if ((tp->t_state&TS_CARR_ON)==0) 1045 return (EIO); 1046 loop: 1047 /* 1048 * Take any pending input first. 1049 */ 1050 s = spltty(); 1051 if (tp->t_flags&PENDIN) 1052 ttypend(tp); 1053 splx(s); 1054 1055 /* 1056 * Hang process if it's in the background. 1057 */ 1058 #define bit(a) (1<<(a-1)) 1059 while (tp == u.u_ttyp && u.u_procp->p_pgrp != tp->t_pgrp) { 1060 if ((u.u_procp->p_sigignore & bit(SIGTTIN)) || 1061 (u.u_procp->p_sigmask & bit(SIGTTIN)) || 1062 /* 1063 (u.u_procp->p_flag&SDETACH) || 1064 */ 1065 u.u_procp->p_flag&SVFORK) 1066 return (EIO); 1067 gsignal(u.u_procp->p_pgrp, SIGTTIN); 1068 sleep((caddr_t)&lbolt, TTIPRI); 1069 } 1070 t_flags = tp->t_flags; 1071 #undef bit 1072 1073 /* 1074 * In raw mode take characters directly from the 1075 * raw queue w/o processing. Interlock against 1076 * device interrupts when interrogating rawq. 1077 */ 1078 if (t_flags&RAW) { 1079 s = spltty(); 1080 if (tp->t_rawq.c_cc <= 0) { 1081 if ((tp->t_state&TS_CARR_ON) == 0 || 1082 (tp->t_state&TS_NBIO)) { 1083 splx(s); 1084 return (EWOULDBLOCK); 1085 } 1086 sleep((caddr_t)&tp->t_rawq, TTIPRI); 1087 splx(s); 1088 goto loop; 1089 } 1090 splx(s); 1091 while (!error && tp->t_rawq.c_cc && uio->uio_resid) 1092 error = ureadc(getc(&tp->t_rawq), uio); 1093 goto checktandem; 1094 } 1095 1096 /* 1097 * In cbreak mode use the rawq, otherwise 1098 * take characters from the canonicalized q. 1099 */ 1100 qp = t_flags&CBREAK ? &tp->t_rawq : &tp->t_canq; 1101 1102 /* 1103 * No input, sleep on rawq awaiting hardware 1104 * receipt and notification. 1105 */ 1106 s = spltty(); 1107 if (qp->c_cc <= 0) { 1108 if ((tp->t_state&TS_CARR_ON) == 0 || 1109 (tp->t_state&TS_NBIO)) { 1110 splx(s); 1111 return (EWOULDBLOCK); 1112 } 1113 sleep((caddr_t)&tp->t_rawq, TTIPRI); 1114 splx(s); 1115 goto loop; 1116 } 1117 splx(s); 1118 1119 /* 1120 * Input present, perform input mapping 1121 * and processing (we're not in raw mode). 1122 */ 1123 first = 1; 1124 while ((c = getc(qp)) >= 0) { 1125 if (t_flags&CRMOD && c == '\r') 1126 c = '\n'; 1127 /* 1128 * Hack lower case simulation on 1129 * upper case only terminals. 1130 */ 1131 if (t_flags&LCASE && c <= 0177) 1132 if (tp->t_state&TS_BKSL) { 1133 if (maptab[c]) 1134 c = maptab[c]; 1135 tp->t_state &= ~TS_BKSL; 1136 } else if (c >= 'A' && c <= 'Z') 1137 c += 'a' - 'A'; 1138 else if (c == '\\') { 1139 tp->t_state |= TS_BKSL; 1140 continue; 1141 } 1142 /* 1143 * Check for delayed suspend character. 1144 */ 1145 if (tp->t_line == NTTYDISC && c == tp->t_dsuspc) { 1146 gsignal(tp->t_pgrp, SIGTSTP); 1147 if (first) { 1148 sleep((caddr_t)&lbolt, TTIPRI); 1149 goto loop; 1150 } 1151 break; 1152 } 1153 /* 1154 * Interpret EOF only in cooked mode. 1155 */ 1156 if (c == tp->t_eofc && (t_flags&CBREAK) == 0) 1157 break; 1158 /* 1159 * Give user character. 1160 */ 1161 error = ureadc(c & 0177, uio); 1162 if (error) 1163 break; 1164 if (uio->uio_resid == 0) 1165 break; 1166 /* 1167 * In cooked mode check for a "break character" 1168 * marking the end of a "line of input". 1169 */ 1170 if ((t_flags&CBREAK) == 0 && ttbreakc(c, tp)) 1171 break; 1172 first = 0; 1173 } 1174 tp->t_state &= ~TS_BKSL; 1175 1176 checktandem: 1177 /* 1178 * Look to unblock output now that (presumably) 1179 * the input queue has gone down. 1180 */ 1181 if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) 1182 if (putc(tp->t_startc, &tp->t_outq) == 0) { 1183 tp->t_state &= ~TS_TBLOCK; 1184 ttstart(tp); 1185 } 1186 return (error); 1187 } 1188 1189 /* 1190 * Called from the device's write routine after it has 1191 * calculated the tty-structure given as argument. 1192 */ 1193 ttwrite(tp, uio) 1194 register struct tty *tp; 1195 register struct uio *uio; 1196 { 1197 register char *cp; 1198 register int cc, ce, c; 1199 int i, hiwat, cnt, error, s; 1200 char obuf[OBUFSIZ]; 1201 1202 if ((tp->t_state&TS_CARR_ON) == 0) 1203 return (EIO); 1204 hiwat = TTHIWAT(tp); 1205 cnt = uio->uio_resid; 1206 error = 0; 1207 loop: 1208 /* 1209 * Hang the process if it's in the background. 1210 */ 1211 #define bit(a) (1<<(a-1)) 1212 while (u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && 1213 (tp->t_flags&TOSTOP) && (u.u_procp->p_flag&SVFORK)==0 && 1214 !(u.u_procp->p_sigignore & bit(SIGTTOU)) && 1215 !(u.u_procp->p_sigmask & bit(SIGTTOU)) 1216 /* 1217 && 1218 (u.u_procp->p_flag&SDETACH)==0) { 1219 */ 1220 ) { 1221 gsignal(u.u_procp->p_pgrp, SIGTTOU); 1222 sleep((caddr_t)&lbolt, TTIPRI); 1223 } 1224 #undef bit 1225 1226 /* 1227 * Process the user's data in at most OBUFSIZ 1228 * chunks. Perform lower case simulation and 1229 * similar hacks. Keep track of high water 1230 * mark, sleep on overflow awaiting device aid 1231 * in acquiring new space. 1232 */ 1233 while (uio->uio_resid > 0) { 1234 /* 1235 * Grab a hunk of data from the user. 1236 */ 1237 cc = uio->uio_iov->iov_len; 1238 if (cc == 0) { 1239 uio->uio_iovcnt--; 1240 uio->uio_iov++; 1241 if (uio->uio_iovcnt < 0) 1242 panic("ttwrite"); 1243 continue; 1244 } 1245 if (cc > OBUFSIZ) 1246 cc = OBUFSIZ; 1247 cp = obuf; 1248 error = uiomove(cp, cc, UIO_WRITE, uio); 1249 if (error) 1250 break; 1251 if (tp->t_outq.c_cc > hiwat) 1252 goto ovhiwat; 1253 if (tp->t_flags&FLUSHO) 1254 continue; 1255 /* 1256 * If we're mapping lower case or kludging tildes, 1257 * then we've got to look at each character, so 1258 * just feed the stuff to ttyoutput... 1259 */ 1260 if (tp->t_flags & (LCASE|TILDE)) { 1261 while (cc > 0) { 1262 c = *cp++; 1263 tp->t_rocount = 0; 1264 while ((c = ttyoutput(c, tp)) >= 0) { 1265 /* out of clists, wait a bit */ 1266 ttstart(tp); 1267 sleep((caddr_t)&lbolt, TTOPRI); 1268 tp->t_rocount = 0; 1269 } 1270 --cc; 1271 if (tp->t_outq.c_cc > hiwat) 1272 goto ovhiwat; 1273 } 1274 continue; 1275 } 1276 /* 1277 * If nothing fancy need be done, grab those characters we 1278 * can handle without any of ttyoutput's processing and 1279 * just transfer them to the output q. For those chars 1280 * which require special processing (as indicated by the 1281 * bits in partab), call ttyoutput. After processing 1282 * a hunk of data, look for FLUSHO so ^O's will take effect 1283 * immediately. 1284 */ 1285 while (cc > 0) { 1286 if (tp->t_flags & (RAW|LITOUT)) 1287 ce = cc; 1288 else { 1289 ce = cc - scanc((unsigned)cc, (caddr_t)cp, 1290 (caddr_t)partab, 077); 1291 /* 1292 * If ce is zero, then we're processing 1293 * a special character through ttyoutput. 1294 */ 1295 if (ce == 0) { 1296 tp->t_rocount = 0; 1297 if (ttyoutput(*cp, tp) >= 0) { 1298 /* no c-lists, wait a bit */ 1299 ttstart(tp); 1300 sleep((caddr_t)&lbolt, TTOPRI); 1301 continue; 1302 } 1303 cp++, cc--; 1304 if (tp->t_flags&FLUSHO || 1305 tp->t_outq.c_cc > hiwat) 1306 goto ovhiwat; 1307 continue; 1308 } 1309 } 1310 /* 1311 * A bunch of normal characters have been found, 1312 * transfer them en masse to the output queue and 1313 * continue processing at the top of the loop. 1314 * If there are any further characters in this 1315 * <= OBUFSIZ chunk, the first should be a character 1316 * requiring special handling by ttyoutput. 1317 */ 1318 tp->t_rocount = 0; 1319 i = b_to_q(cp, ce, &tp->t_outq); 1320 ce -= i; 1321 tp->t_col += ce; 1322 cp += ce, cc -= ce, tk_nout += ce; 1323 if (i > 0) { 1324 /* out of c-lists, wait a bit */ 1325 ttstart(tp); 1326 sleep((caddr_t)&lbolt, TTOPRI); 1327 } 1328 if (tp->t_flags&FLUSHO || tp->t_outq.c_cc > hiwat) 1329 goto ovhiwat; 1330 } 1331 } 1332 ttstart(tp); 1333 return (error); 1334 1335 ovhiwat: 1336 s = spltty(); 1337 if (cc != 0) { 1338 uio->uio_iov->iov_base -= cc; 1339 uio->uio_iov->iov_len += cc; 1340 uio->uio_resid += cc; 1341 uio->uio_offset -= cc; 1342 } 1343 /* 1344 * This can only occur if FLUSHO 1345 * is also set in t_flags. 1346 */ 1347 if (tp->t_outq.c_cc <= hiwat) { 1348 splx(s); 1349 goto loop; 1350 } 1351 ttstart(tp); 1352 if (tp->t_state&TS_NBIO) { 1353 splx(s); 1354 if (uio->uio_resid == cnt) 1355 return (EWOULDBLOCK); 1356 return (0); 1357 } 1358 tp->t_state |= TS_ASLEEP; 1359 sleep((caddr_t)&tp->t_outq, TTOPRI); 1360 splx(s); 1361 goto loop; 1362 } 1363 1364 /* 1365 * Rubout one character from the rawq of tp 1366 * as cleanly as possible. 1367 */ 1368 ttyrub(c, tp) 1369 register c; 1370 register struct tty *tp; 1371 { 1372 register char *cp; 1373 register int savecol; 1374 int s; 1375 char *nextc(); 1376 1377 if ((tp->t_flags&ECHO) == 0) 1378 return; 1379 tp->t_flags &= ~FLUSHO; 1380 c &= 0377; 1381 if (tp->t_flags&CRTBS) { 1382 if (tp->t_rocount == 0) { 1383 /* 1384 * Screwed by ttwrite; retype 1385 */ 1386 ttyretype(tp); 1387 return; 1388 } 1389 if (c == ('\t'|0200) || c == ('\n'|0200)) 1390 ttyrubo(tp, 2); 1391 else switch (partab[c&=0177]&0177) { 1392 1393 case ORDINARY: 1394 if (tp->t_flags&LCASE && c >= 'A' && c <= 'Z') 1395 ttyrubo(tp, 2); 1396 else 1397 ttyrubo(tp, 1); 1398 break; 1399 1400 case VTAB: 1401 case BACKSPACE: 1402 case CONTROL: 1403 case RETURN: 1404 if (tp->t_flags&CTLECH) 1405 ttyrubo(tp, 2); 1406 break; 1407 1408 case TAB: 1409 if (tp->t_rocount < tp->t_rawq.c_cc) { 1410 ttyretype(tp); 1411 return; 1412 } 1413 s = spltty(); 1414 savecol = tp->t_col; 1415 tp->t_state |= TS_CNTTB; 1416 tp->t_flags |= FLUSHO; 1417 tp->t_col = tp->t_rocol; 1418 cp = tp->t_rawq.c_cf; 1419 for (; cp; cp = nextc(&tp->t_rawq, cp)) 1420 ttyecho(*cp, tp); 1421 tp->t_flags &= ~FLUSHO; 1422 tp->t_state &= ~TS_CNTTB; 1423 splx(s); 1424 /* 1425 * savecol will now be length of the tab 1426 */ 1427 savecol -= tp->t_col; 1428 tp->t_col += savecol; 1429 if (savecol > 8) 1430 savecol = 8; /* overflow screw */ 1431 while (--savecol >= 0) 1432 (void) ttyoutput('\b', tp); 1433 break; 1434 1435 default: 1436 panic("ttyrub"); 1437 } 1438 } else if (tp->t_flags&PRTERA) { 1439 if ((tp->t_state&TS_ERASE) == 0) { 1440 (void) ttyoutput('\\', tp); 1441 tp->t_state |= TS_ERASE; 1442 } 1443 ttyecho(c, tp); 1444 } else 1445 ttyecho(tp->t_erase, tp); 1446 tp->t_rocount--; 1447 } 1448 1449 /* 1450 * Crt back over cnt chars perhaps 1451 * erasing them. 1452 */ 1453 ttyrubo(tp, cnt) 1454 register struct tty *tp; 1455 int cnt; 1456 { 1457 register char *rubostring = tp->t_flags&CRTERA ? "\b \b" : "\b"; 1458 1459 while (--cnt >= 0) 1460 ttyout(rubostring, tp); 1461 } 1462 1463 /* 1464 * Reprint the rawq line. 1465 * We assume c_cc has already been checked. 1466 */ 1467 ttyretype(tp) 1468 register struct tty *tp; 1469 { 1470 register char *cp; 1471 char *nextc(); 1472 int s; 1473 1474 if (tp->t_rprntc != 0377) 1475 ttyecho(tp->t_rprntc, tp); 1476 (void) ttyoutput('\n', tp); 1477 s = spltty(); 1478 for (cp = tp->t_canq.c_cf; cp; cp = nextc(&tp->t_canq, cp)) 1479 ttyecho(*cp, tp); 1480 for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) 1481 ttyecho(*cp, tp); 1482 tp->t_state &= ~TS_ERASE; 1483 splx(s); 1484 tp->t_rocount = tp->t_rawq.c_cc; 1485 tp->t_rocol = 0; 1486 } 1487 1488 /* 1489 * Echo a typed character to the terminal 1490 */ 1491 ttyecho(c, tp) 1492 register c; 1493 register struct tty *tp; 1494 { 1495 1496 if ((tp->t_state&TS_CNTTB) == 0) 1497 tp->t_flags &= ~FLUSHO; 1498 if ((tp->t_flags&ECHO) == 0) 1499 return; 1500 c &= 0377; 1501 if (tp->t_flags&RAW) { 1502 (void) ttyoutput(c, tp); 1503 return; 1504 } 1505 if (c == '\r' && tp->t_flags&CRMOD) 1506 c = '\n'; 1507 if (tp->t_flags&CTLECH) { 1508 if ((c&0177) <= 037 && c!='\t' && c!='\n' || (c&0177)==0177) { 1509 (void) ttyoutput('^', tp); 1510 c &= 0177; 1511 if (c == 0177) 1512 c = '?'; 1513 else if (tp->t_flags&LCASE) 1514 c += 'a' - 1; 1515 else 1516 c += 'A' - 1; 1517 } 1518 } 1519 if ((tp->t_flags&LCASE) && (c >= 'A' && c <= 'Z')) 1520 c += 'a' - 'A'; 1521 (void) ttyoutput(c&0177, tp); 1522 } 1523 1524 /* 1525 * Is c a break char for tp? 1526 */ 1527 ttbreakc(c, tp) 1528 register c; 1529 register struct tty *tp; 1530 { 1531 return (c == '\n' || c == tp->t_eofc || c == tp->t_brkc || 1532 c == '\r' && (tp->t_flags&CRMOD)); 1533 } 1534 1535 /* 1536 * send string cp to tp 1537 */ 1538 ttyout(cp, tp) 1539 register char *cp; 1540 register struct tty *tp; 1541 { 1542 register char c; 1543 1544 while (c = *cp++) 1545 (void) ttyoutput(c, tp); 1546 } 1547 1548 ttwakeup(tp) 1549 struct tty *tp; 1550 { 1551 1552 if (tp->t_rsel) { 1553 selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL); 1554 tp->t_state &= ~TS_RCOLL; 1555 tp->t_rsel = 0; 1556 } 1557 if (tp->t_state & TS_ASYNC) 1558 gsignal(tp->t_pgrp, SIGIO); 1559 wakeup((caddr_t)&tp->t_rawq); 1560 } 1561 1562 #if !defined(vax) 1563 scanc(size, cp, table, mask) 1564 register int size; 1565 register char *cp, table[]; 1566 register int mask; 1567 { 1568 register int i = 0; 1569 1570 while ((table[*(u_char *)(cp + i)]&mask) == 0 && i < size) 1571 i++; 1572 return (size - i); 1573 } 1574 #endif 1575