| 1 | /* tty.c 3.6 %H% */ |
| 2 | |
| 3 | /* |
| 4 | * general TTY subroutines |
| 5 | */ |
| 6 | #include "../h/param.h" |
| 7 | #include "../h/systm.h" |
| 8 | #include "../h/dir.h" |
| 9 | #include "../h/user.h" |
| 10 | #include "../h/tty.h" |
| 11 | #include "../h/proc.h" |
| 12 | #include "../h/mx.h" |
| 13 | #include "../h/inode.h" |
| 14 | #include "../h/file.h" |
| 15 | #include "../h/reg.h" |
| 16 | #include "../h/conf.h" |
| 17 | #include "../h/buf.h" |
| 18 | |
| 19 | char partab[]; |
| 20 | |
| 21 | /* |
| 22 | * When running dz's using only SAE (silo alarm) on input |
| 23 | * it is necessary to call dzrint() at clock interrupt time. |
| 24 | * This is unsafe unless spl5()s in tty code are changed to |
| 25 | * spl6()s to block clock interrupts. Note that the dh driver |
| 26 | * currently in use works the same way as the dz, even though |
| 27 | * we could try to more intelligently manage its silo. |
| 28 | * Thus don't take this out if you have no dz's unless you |
| 29 | * change clock.c and dhtimer(). |
| 30 | */ |
| 31 | #define spl5 spl6 |
| 32 | |
| 33 | /* |
| 34 | * Input mapping table-- if an entry is non-zero, when the |
| 35 | * corresponding character is typed preceded by "\" the escape |
| 36 | * sequence is replaced by the table value. Mostly used for |
| 37 | * upper-case only terminals. |
| 38 | */ |
| 39 | |
| 40 | char maptab[] ={ |
| 41 | 000,000,000,000,000,000,000,000, |
| 42 | 000,000,000,000,000,000,000,000, |
| 43 | 000,000,000,000,000,000,000,000, |
| 44 | 000,000,000,000,000,000,000,000, |
| 45 | 000,'|',000,000,000,000,000,'`', |
| 46 | '{','}',000,000,000,000,000,000, |
| 47 | 000,000,000,000,000,000,000,000, |
| 48 | 000,000,000,000,000,000,000,000, |
| 49 | 000,000,000,000,000,000,000,000, |
| 50 | 000,000,000,000,000,000,000,000, |
| 51 | 000,000,000,000,000,000,000,000, |
| 52 | 000,000,000,000,000,000,'~',000, |
| 53 | 000,'A','B','C','D','E','F','G', |
| 54 | 'H','I','J','K','L','M','N','O', |
| 55 | 'P','Q','R','S','T','U','V','W', |
| 56 | 'X','Y','Z',000,000,000,000,000, |
| 57 | }; |
| 58 | |
| 59 | |
| 60 | /* |
| 61 | * shorthand |
| 62 | */ |
| 63 | #define q1 tp->t_rawq |
| 64 | #define q2 tp->t_canq |
| 65 | #define q3 tp->t_outq |
| 66 | #define q4 tp->t_un.t_ctlq |
| 67 | |
| 68 | #define OBUFSIZ 100 |
| 69 | |
| 70 | /* |
| 71 | * routine called on first teletype open. |
| 72 | * establishes a process group for distribution |
| 73 | * of quits and interrupts from the tty. |
| 74 | */ |
| 75 | ttyopen(dev, tp) |
| 76 | dev_t dev; |
| 77 | register struct tty *tp; |
| 78 | { |
| 79 | register struct proc *pp; |
| 80 | |
| 81 | pp = u.u_procp; |
| 82 | tp->t_dev = dev; |
| 83 | if(pp->p_pgrp == 0) { |
| 84 | u.u_ttyp = tp; |
| 85 | u.u_ttyd = dev; |
| 86 | if (tp->t_pgrp == 0) |
| 87 | tp->t_pgrp = pp->p_pid; |
| 88 | pp->p_pgrp = tp->t_pgrp; |
| 89 | } |
| 90 | tp->t_state &= ~WOPEN; |
| 91 | tp->t_state |= ISOPEN; |
| 92 | tp->t_line = 0; /* conservative */ |
| 93 | } |
| 94 | |
| 95 | /* |
| 96 | * set default control characters. |
| 97 | */ |
| 98 | ttychars(tp) |
| 99 | register struct tty *tp; |
| 100 | { |
| 101 | |
| 102 | tun.t_intrc = CINTR; |
| 103 | tun.t_quitc = CQUIT; |
| 104 | tun.t_startc = CSTART; |
| 105 | tun.t_stopc = CSTOP; |
| 106 | tun.t_eofc = CEOT; |
| 107 | tun.t_brkc = CBRK; |
| 108 | tp->t_erase = CERASE; |
| 109 | tp->t_kill = CKILL; |
| 110 | /* begin local */ |
| 111 | tlun.t_suspc = CTRL(z); |
| 112 | tlun.t_dsuspc = CTRL(y); |
| 113 | tlun.t_rprntc = CTRL(r); |
| 114 | tlun.t_flushc = CTRL(o); |
| 115 | tlun.t_werasc = CTRL(w); |
| 116 | tlun.t_lnextc = CTRL(v); |
| 117 | tlun.t_lintr = CTRL(c); |
| 118 | tlun.t_lerase = CTRL(h); |
| 119 | tlun.t_lkill = CTRL(u); |
| 120 | tp->t_local = 0; |
| 121 | tp->t_lstate = 0; |
| 122 | /* end local */ |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * clean tp on last close |
| 127 | */ |
| 128 | ttyclose(tp) |
| 129 | register struct tty *tp; |
| 130 | { |
| 131 | |
| 132 | tp->t_pgrp = 0; |
| 133 | wflushtty(tp); |
| 134 | tp->t_state = 0; |
| 135 | tp->t_line = 0; |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * stty/gtty writearound |
| 140 | */ |
| 141 | stty() |
| 142 | { |
| 143 | u.u_arg[2] = u.u_arg[1]; |
| 144 | u.u_arg[1] = TIOCSETP; |
| 145 | ioctl(); |
| 146 | } |
| 147 | |
| 148 | gtty() |
| 149 | { |
| 150 | u.u_arg[2] = u.u_arg[1]; |
| 151 | u.u_arg[1] = TIOCGETP; |
| 152 | ioctl(); |
| 153 | } |
| 154 | |
| 155 | /* |
| 156 | * Do nothing specific version of line |
| 157 | * discipline specific ioctl command. |
| 158 | */ |
| 159 | /*ARGSUSED*/ |
| 160 | nullioctl(tp, cmd, addr) |
| 161 | register struct tty *tp; |
| 162 | caddr_t addr; |
| 163 | { |
| 164 | |
| 165 | return (cmd); |
| 166 | } |
| 167 | |
| 168 | /* |
| 169 | * ioctl system call |
| 170 | * Check legality, execute common code, and switch out to individual |
| 171 | * device routine. |
| 172 | */ |
| 173 | ioctl() |
| 174 | { |
| 175 | register struct file *fp; |
| 176 | register struct inode *ip; |
| 177 | register struct a { |
| 178 | int fdes; |
| 179 | int cmd; |
| 180 | caddr_t cmarg; |
| 181 | } *uap; |
| 182 | register dev_t dev; |
| 183 | register fmt; |
| 184 | |
| 185 | uap = (struct a *)u.u_ap; |
| 186 | if ((fp = getf(uap->fdes)) == NULL) |
| 187 | return; |
| 188 | if (uap->cmd==FIOCLEX) { |
| 189 | u.u_pofile[uap->fdes] |= EXCLOSE; |
| 190 | return; |
| 191 | } |
| 192 | if (uap->cmd==FIONCLEX) { |
| 193 | u.u_pofile[uap->fdes] &= ~EXCLOSE; |
| 194 | return; |
| 195 | } |
| 196 | ip = fp->f_inode; |
| 197 | fmt = ip->i_mode & IFMT; |
| 198 | if (fmt != IFCHR && fmt != IFMPC) { |
| 199 | /* begin local */ |
| 200 | if (uap->cmd==FIONREAD && (fmt == IFREG || fmt == IFDIR)) { |
| 201 | off_t nread = ip->i_size - fp->f_un.f_offset; |
| 202 | |
| 203 | if (copyout((caddr_t)&nread, uap->cmarg, sizeof(off_t))) |
| 204 | u.u_error = EFAULT; |
| 205 | } else |
| 206 | /* end local */ |
| 207 | u.u_error = ENOTTY; |
| 208 | return; |
| 209 | } |
| 210 | dev = ip->i_un.i_rdev; |
| 211 | u.u_r.r_val1 = 0; |
| 212 | (*cdevsw[major(dev)].d_ioctl)(dev, uap->cmd, uap->cmarg, fp->f_flag); |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * Common code for several tty ioctl commands |
| 217 | */ |
| 218 | ttioccomm(com, tp, addr, dev) |
| 219 | register struct tty *tp; |
| 220 | caddr_t addr; |
| 221 | { |
| 222 | unsigned t; |
| 223 | struct sgttyb iocb; |
| 224 | struct clist tq; |
| 225 | extern int nldisp; |
| 226 | |
| 227 | switch(com) { |
| 228 | |
| 229 | /* |
| 230 | * get discipline number |
| 231 | */ |
| 232 | case TIOCGETD: |
| 233 | t = tp->t_line; |
| 234 | if (copyout((caddr_t)&t, addr, sizeof(t))) |
| 235 | u.u_error = EFAULT; |
| 236 | break; |
| 237 | |
| 238 | /* |
| 239 | * set line discipline |
| 240 | */ |
| 241 | case TIOCSETD: |
| 242 | if (copyin(addr, (caddr_t)&t, sizeof(t))) { |
| 243 | u.u_error = EFAULT; |
| 244 | break; |
| 245 | } |
| 246 | if (t >= nldisp) { |
| 247 | u.u_error = ENXIO; |
| 248 | break; |
| 249 | } |
| 250 | (void) spl5(); |
| 251 | if (tp->t_line) |
| 252 | (*linesw[tp->t_line].l_close)(tp); |
| 253 | if (t) |
| 254 | (*linesw[t].l_open)(dev, tp, addr); |
| 255 | if (u.u_error==0) |
| 256 | tp->t_line = t; |
| 257 | (void) spl0(); |
| 258 | break; |
| 259 | |
| 260 | /* |
| 261 | * prevent more opens on channel |
| 262 | */ |
| 263 | case TIOCEXCL: |
| 264 | tp->t_state |= XCLUDE; |
| 265 | break; |
| 266 | |
| 267 | case TIOCNXCL: |
| 268 | tp->t_state &= ~XCLUDE; |
| 269 | break; |
| 270 | |
| 271 | /* |
| 272 | * Set new parameters |
| 273 | */ |
| 274 | case TIOCSETP: |
| 275 | case TIOCSETN: |
| 276 | if (copyin(addr, (caddr_t)&iocb, sizeof(iocb))) { |
| 277 | u.u_error = EFAULT; |
| 278 | return(1); |
| 279 | } |
| 280 | (void) spl5(); |
| 281 | if (tp->t_line == 0) { |
| 282 | if (com == TIOCSETP) |
| 283 | wflushtty(tp); |
| 284 | while (canon(tp)>=0) |
| 285 | ; |
| 286 | } else if (tp->t_line == NTTYDISC) { |
| 287 | if (tp->t_flags&RAW || iocb.sg_flags&RAW || |
| 288 | com == TIOCSETP) |
| 289 | wflushtty(tp); |
| 290 | else if ((tp->t_flags&CBREAK) != (iocb.sg_flags&CBREAK)) { |
| 291 | if (iocb.sg_flags & CBREAK) { |
| 292 | catq(&tp->t_rawq, &tp->t_canq); |
| 293 | tq = tp->t_rawq; |
| 294 | tp->t_rawq = tp->t_canq; |
| 295 | tp->t_canq = tq; |
| 296 | } else { |
| 297 | tp->t_local |= LPENDIN; |
| 298 | if (tp->t_canq.c_cc) |
| 299 | panic("ioccom canq"); |
| 300 | if (tp->t_chan) |
| 301 | (void) sdata(tp->t_chan); |
| 302 | else |
| 303 | wakeup((caddr_t)&tp->t_rawq); |
| 304 | } |
| 305 | } |
| 306 | } |
| 307 | if ((tp->t_state&SPEEDS)==0) { |
| 308 | tp->t_ispeed = iocb.sg_ispeed; |
| 309 | tp->t_ospeed = iocb.sg_ospeed; |
| 310 | } |
| 311 | tp->t_erase = iocb.sg_erase; |
| 312 | tp->t_kill = iocb.sg_kill; |
| 313 | tp->t_flags = iocb.sg_flags; |
| 314 | (void) spl0(); |
| 315 | break; |
| 316 | |
| 317 | /* |
| 318 | * send current parameters to user |
| 319 | */ |
| 320 | case TIOCGETP: |
| 321 | iocb.sg_ispeed = tp->t_ispeed; |
| 322 | iocb.sg_ospeed = tp->t_ospeed; |
| 323 | iocb.sg_erase = tp->t_erase; |
| 324 | iocb.sg_kill = tp->t_kill; |
| 325 | iocb.sg_flags = tp->t_flags; |
| 326 | if (copyout((caddr_t)&iocb, addr, sizeof(iocb))) |
| 327 | u.u_error = EFAULT; |
| 328 | break; |
| 329 | |
| 330 | /* |
| 331 | * Hang up line on last close |
| 332 | */ |
| 333 | |
| 334 | case TIOCHPCL: |
| 335 | tp->t_state |= HUPCLS; |
| 336 | break; |
| 337 | |
| 338 | case TIOCFLUSH: |
| 339 | flushtty(tp); |
| 340 | break; |
| 341 | |
| 342 | /* |
| 343 | * ioctl entries to line discipline |
| 344 | */ |
| 345 | case DIOCSETP: |
| 346 | case DIOCGETP: |
| 347 | if ((*linesw[tp->t_line].l_ioctl)(com, tp, addr)) |
| 348 | u.u_error = ENOTTY; |
| 349 | break; |
| 350 | |
| 351 | /* |
| 352 | * set and fetch special characters |
| 353 | */ |
| 354 | case TIOCSETC: |
| 355 | if (copyin(addr, (caddr_t)&tun, sizeof(struct tchars))) |
| 356 | u.u_error = EFAULT; |
| 357 | break; |
| 358 | |
| 359 | case TIOCGETC: |
| 360 | if (copyout((caddr_t)&tun, addr, sizeof(struct tchars))) |
| 361 | u.u_error = EFAULT; |
| 362 | break; |
| 363 | |
| 364 | /* local ioctls */ |
| 365 | case TIOCSLTC: |
| 366 | if (copyin(addr, (caddr_t)&tlun, sizeof (struct ltchars))) |
| 367 | u.u_error = EFAULT; |
| 368 | break; |
| 369 | |
| 370 | case TIOCGLTC: |
| 371 | if (copyout((caddr_t)&tlun, addr, sizeof (struct ltchars))) |
| 372 | u.u_error = EFAULT; |
| 373 | break; |
| 374 | |
| 375 | case FIONREAD: { |
| 376 | off_t nread = tp->t_canq.c_cc; |
| 377 | |
| 378 | if (tp->t_flags & (RAW|CBREAK)) |
| 379 | nread += tp->t_rawq.c_cc; |
| 380 | if (copyout((caddr_t)&nread, addr, sizeof (off_t))) |
| 381 | u.u_error = EFAULT; |
| 382 | break; |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * Should allow SPGRP and GPGRP only if tty open for reading. |
| 387 | */ |
| 388 | case TIOCSPGRP: |
| 389 | tp->t_pgrp = (int)addr; |
| 390 | break; |
| 391 | |
| 392 | case TIOCGPGRP: |
| 393 | if (copyout((caddr_t)&tp->t_pgrp, addr, sizeof(tp->t_pgrp))) |
| 394 | u.u_error = EFAULT; |
| 395 | break; |
| 396 | |
| 397 | /* |
| 398 | * Modify local mode word. |
| 399 | */ |
| 400 | case TIOCLBIS: |
| 401 | tp->t_local |= (int)addr; |
| 402 | break; |
| 403 | |
| 404 | case TIOCLBIC: |
| 405 | tp->t_local &= ~(int)addr; |
| 406 | break; |
| 407 | |
| 408 | case TIOCLSET: |
| 409 | tp->t_local = (int)addr; |
| 410 | break; |
| 411 | |
| 412 | case TIOCLGET: |
| 413 | if (copyout((caddr_t)&tp->t_local, addr, sizeof(tp->t_local))) |
| 414 | u.u_error = EFAULT; |
| 415 | break; |
| 416 | |
| 417 | /* end of locals */ |
| 418 | default: |
| 419 | return(0); |
| 420 | } |
| 421 | return(1); |
| 422 | } |
| 423 | |
| 424 | /* |
| 425 | * Wait for output to drain, then flush input waiting. |
| 426 | */ |
| 427 | wflushtty(tp) |
| 428 | register struct tty *tp; |
| 429 | { |
| 430 | |
| 431 | (void) spl5(); |
| 432 | while (tp->t_outq.c_cc && tp->t_state&CARR_ON) { |
| 433 | (*tp->t_oproc)(tp); |
| 434 | tp->t_state |= ASLEEP; |
| 435 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
| 436 | } |
| 437 | flushtty(tp); |
| 438 | (void) spl0(); |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * flush all TTY queues |
| 443 | */ |
| 444 | flushtty(tp) |
| 445 | register struct tty *tp; |
| 446 | { |
| 447 | register s; |
| 448 | |
| 449 | s = spl6(); |
| 450 | while (getc(&tp->t_canq) >= 0) |
| 451 | ; |
| 452 | wakeup((caddr_t)&tp->t_rawq); |
| 453 | wakeup((caddr_t)&tp->t_outq); |
| 454 | tp->t_state &= ~TTSTOP; |
| 455 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); |
| 456 | while (getc(&tp->t_outq) >= 0) |
| 457 | ; |
| 458 | while (getc(&tp->t_rawq) >= 0) |
| 459 | ; |
| 460 | tp->t_delct = 0; |
| 461 | tp->t_rocount = 0; /* local */ |
| 462 | tp->t_lstate = 0; |
| 463 | splx(s); |
| 464 | } |
| 465 | |
| 466 | |
| 467 | |
| 468 | /* |
| 469 | * transfer raw input list to canonical list, |
| 470 | * doing erase-kill processing and handling escapes. |
| 471 | * It waits until a full line has been typed in cooked mode, |
| 472 | * or until any character has been typed in raw mode. |
| 473 | */ |
| 474 | canon(tp) |
| 475 | register struct tty *tp; |
| 476 | { |
| 477 | register char *bp; |
| 478 | char *bp1; |
| 479 | register int c; |
| 480 | int mc; |
| 481 | int s; |
| 482 | |
| 483 | if ((tp->t_flags&(RAW|CBREAK))==0 && tp->t_delct==0 |
| 484 | || (tp->t_flags&(RAW|CBREAK))!=0 && tp->t_rawq.c_cc==0) { |
| 485 | return(-1); |
| 486 | } |
| 487 | s = spl0(); |
| 488 | loop: |
| 489 | bp = &canonb[2]; |
| 490 | while ((c=getc(&tp->t_rawq)) >= 0) { |
| 491 | if ((tp->t_flags&(RAW|CBREAK))==0) { |
| 492 | if (c==0377) { |
| 493 | tp->t_delct--; |
| 494 | break; |
| 495 | } |
| 496 | if (bp[-1]!='\\') { |
| 497 | if (c==tp->t_erase) { |
| 498 | if (bp > &canonb[2]) |
| 499 | bp--; |
| 500 | continue; |
| 501 | } |
| 502 | if (c==tp->t_kill) |
| 503 | goto loop; |
| 504 | if (c==tun.t_eofc) |
| 505 | continue; |
| 506 | } else { |
| 507 | mc = maptab[c]; |
| 508 | if (c==tp->t_erase || c==tp->t_kill) |
| 509 | mc = c; |
| 510 | if (mc && (mc==c || (tp->t_flags&LCASE))) { |
| 511 | if (bp[-2] != '\\') |
| 512 | c = mc; |
| 513 | bp--; |
| 514 | } |
| 515 | } |
| 516 | } |
| 517 | *bp++ = c; |
| 518 | if (bp>=canonb+CANBSIZ) |
| 519 | break; |
| 520 | } |
| 521 | bp1 = &canonb[2]; |
| 522 | (void) b_to_q(bp1, bp-bp1, &tp->t_canq); |
| 523 | |
| 524 | if (tp->t_state&TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { |
| 525 | if (putc(tun.t_startc, &tp->t_outq)==0) { |
| 526 | tp->t_state &= ~TBLOCK; |
| 527 | ttstart(tp); |
| 528 | } |
| 529 | tp->t_char = 0; |
| 530 | } |
| 531 | |
| 532 | splx(s); |
| 533 | return(0); |
| 534 | } |
| 535 | |
| 536 | |
| 537 | /* |
| 538 | * block transfer input handler. |
| 539 | */ |
| 540 | ttyrend(tp, pb, pe) |
| 541 | register struct tty *tp; |
| 542 | register char *pb, *pe; |
| 543 | { |
| 544 | int tandem; |
| 545 | |
| 546 | tandem = tp->t_flags&TANDEM; |
| 547 | if (tp->t_flags&RAW) { |
| 548 | (void) b_to_q(pb, pe-pb, &tp->t_rawq); |
| 549 | if (tp->t_chan) |
| 550 | (void) sdata(tp->t_chan); else |
| 551 | wakeup((caddr_t)&tp->t_rawq); |
| 552 | } else { |
| 553 | tp->t_flags &= ~TANDEM; |
| 554 | while (pb < pe) |
| 555 | ttyinput(*pb++, tp); |
| 556 | tp->t_flags |= tandem; |
| 557 | } |
| 558 | if (tandem) |
| 559 | ttyblock(tp); |
| 560 | } |
| 561 | |
| 562 | /* |
| 563 | * Place a character on raw TTY input queue, putting in delimiters |
| 564 | * and waking up top half as needed. |
| 565 | * Also echo if required. |
| 566 | * The arguments are the character and the appropriate |
| 567 | * tty structure. |
| 568 | */ |
| 569 | ttyinput(c, tp) |
| 570 | register c; |
| 571 | register struct tty *tp; |
| 572 | { |
| 573 | register int t_flags; |
| 574 | register struct chan *cp; |
| 575 | |
| 576 | tk_nin += 1; |
| 577 | c &= 0377; |
| 578 | t_flags = tp->t_flags; |
| 579 | if (t_flags&TANDEM) |
| 580 | ttyblock(tp); |
| 581 | if ((t_flags&RAW)==0) { |
| 582 | c &= 0177; |
| 583 | if (tp->t_state&TTSTOP) { |
| 584 | if (c==tun.t_startc) { |
| 585 | tp->t_state &= ~TTSTOP; |
| 586 | ttstart(tp); |
| 587 | return; |
| 588 | } |
| 589 | if (c==tun.t_stopc) |
| 590 | return; |
| 591 | tp->t_state &= ~TTSTOP; |
| 592 | ttstart(tp); |
| 593 | } else { |
| 594 | if (c==tun.t_stopc) { |
| 595 | tp->t_state |= TTSTOP; |
| 596 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); |
| 597 | return; |
| 598 | } |
| 599 | if (c==tun.t_startc) |
| 600 | return; |
| 601 | } |
| 602 | if (c==tun.t_quitc || c==tun.t_intrc) { |
| 603 | flushtty(tp); |
| 604 | c = (c==tun.t_intrc) ? SIGINT:SIGQUIT; |
| 605 | if (tp->t_chan) |
| 606 | scontrol(tp->t_chan, M_SIG, c); |
| 607 | else |
| 608 | gsignal(tp->t_pgrp, c); |
| 609 | return; |
| 610 | } |
| 611 | if (c=='\r' && t_flags&CRMOD) |
| 612 | c = '\n'; |
| 613 | } |
| 614 | if (tp->t_rawq.c_cc>TTYHOG) { |
| 615 | flushtty(tp); |
| 616 | return; |
| 617 | } |
| 618 | if (t_flags&LCASE && c>='A' && c<='Z') |
| 619 | c += 'a'-'A'; |
| 620 | (void) putc(c, &tp->t_rawq); |
| 621 | if (t_flags&(RAW|CBREAK)||(c=='\n'||c==tun.t_eofc||c==tun.t_brkc)) { |
| 622 | if ((t_flags&(RAW|CBREAK))==0 && putc(0377, &tp->t_rawq)==0) |
| 623 | tp->t_delct++; |
| 624 | if ((cp=tp->t_chan)!=NULL) |
| 625 | (void) sdata(cp); else |
| 626 | wakeup((caddr_t)&tp->t_rawq); |
| 627 | } |
| 628 | if (t_flags&ECHO) { |
| 629 | ttyoutput(c, tp); |
| 630 | if (c==tp->t_kill && (t_flags&(RAW|CBREAK))==0) |
| 631 | ttyoutput('\n', tp); |
| 632 | ttstart(tp); |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | |
| 637 | /* |
| 638 | * Send stop character on input overflow. |
| 639 | */ |
| 640 | ttyblock(tp) |
| 641 | register struct tty *tp; |
| 642 | { |
| 643 | register x; |
| 644 | x = q1.c_cc + q2.c_cc; |
| 645 | if (q1.c_cc > TTYHOG) { |
| 646 | flushtty(tp); |
| 647 | tp->t_state &= ~TBLOCK; |
| 648 | } |
| 649 | if (x >= TTYHOG/2) { |
| 650 | if (putc(tun.t_stopc, &tp->t_outq)==0) { |
| 651 | tp->t_state |= TBLOCK; |
| 652 | tp->t_char++; |
| 653 | ttstart(tp); |
| 654 | } |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | /* |
| 659 | * put character on TTY output queue, adding delays, |
| 660 | * expanding tabs, and handling the CR/NL bit. |
| 661 | * It is called both from the top half for output, and from |
| 662 | * interrupt level for echoing. |
| 663 | * The arguments are the character and the tty structure. |
| 664 | */ |
| 665 | ttyoutput(c, tp) |
| 666 | register c; |
| 667 | register struct tty *tp; |
| 668 | { |
| 669 | register char *colp; |
| 670 | register ctype; |
| 671 | |
| 672 | /* |
| 673 | * Ignore EOT in normal mode to avoid hanging up |
| 674 | * certain terminals. |
| 675 | * In raw mode dump the char unchanged. |
| 676 | */ |
| 677 | if ((tp->t_flags&RAW)==0) { |
| 678 | c &= 0177; |
| 679 | if ((tp->t_flags&CBREAK)==0 && c==CEOT) |
| 680 | return; |
| 681 | } else { |
| 682 | tk_nout++; |
| 683 | (void) putc(c, &tp->t_outq); |
| 684 | return; |
| 685 | } |
| 686 | |
| 687 | /* |
| 688 | * Turn tabs to spaces as required |
| 689 | */ |
| 690 | if (c=='\t' && (tp->t_flags&TBDELAY)==XTABS) { |
| 691 | c = 8 - (tp->t_col & 7); |
| 692 | (void) b_to_q(" ", c, &tp->t_outq); |
| 693 | tp->t_col += c; |
| 694 | tk_nout += c; |
| 695 | return; |
| 696 | } |
| 697 | tk_nout++; |
| 698 | /* |
| 699 | * for upper-case-only terminals, |
| 700 | * generate escapes. |
| 701 | */ |
| 702 | if (tp->t_flags&LCASE) { |
| 703 | colp = "({)}!|^~'`"; |
| 704 | while(*colp++) |
| 705 | if(c == *colp++) { |
| 706 | ttyoutput('\\', tp); |
| 707 | c = colp[-2]; |
| 708 | break; |
| 709 | } |
| 710 | if ('a'<=c && c<='z') |
| 711 | c += 'A' - 'a'; |
| 712 | } |
| 713 | /* |
| 714 | * turn <nl> to <cr><lf> if desired. |
| 715 | */ |
| 716 | if (c=='\n' && tp->t_flags&CRMOD) |
| 717 | ttyoutput('\r', tp); |
| 718 | (void) putc(c, &tp->t_outq); |
| 719 | /* |
| 720 | * Calculate delays. |
| 721 | * The numbers here represent clock ticks |
| 722 | * and are not necessarily optimal for all terminals. |
| 723 | * The delays are indicated by characters above 0200. |
| 724 | * In raw mode there are no delays and the |
| 725 | * transmission path is 8 bits wide. |
| 726 | */ |
| 727 | colp = &tp->t_col; |
| 728 | ctype = partab[c]; |
| 729 | c = 0; |
| 730 | switch (ctype&077) { |
| 731 | |
| 732 | /* ordinary */ |
| 733 | case 0: |
| 734 | (*colp)++; |
| 735 | |
| 736 | /* non-printing */ |
| 737 | case 1: |
| 738 | break; |
| 739 | |
| 740 | /* backspace */ |
| 741 | case 2: |
| 742 | if (*colp) |
| 743 | (*colp)--; |
| 744 | break; |
| 745 | |
| 746 | /* newline */ |
| 747 | case 3: |
| 748 | ctype = (tp->t_flags >> 8) & 03; |
| 749 | if(ctype == 1) { /* tty 37 */ |
| 750 | if (*colp) |
| 751 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); |
| 752 | } else |
| 753 | if(ctype == 2) { /* vt05 */ |
| 754 | c = 6; |
| 755 | } |
| 756 | *colp = 0; |
| 757 | break; |
| 758 | |
| 759 | /* tab */ |
| 760 | case 4: |
| 761 | ctype = (tp->t_flags >> 10) & 03; |
| 762 | if(ctype == 1) { /* tty 37 */ |
| 763 | c = 1 - (*colp | ~07); |
| 764 | if(c < 5) |
| 765 | c = 0; |
| 766 | } |
| 767 | *colp |= 07; |
| 768 | (*colp)++; |
| 769 | break; |
| 770 | |
| 771 | /* vertical motion */ |
| 772 | case 5: |
| 773 | if(tp->t_flags & VTDELAY) /* tty 37 */ |
| 774 | c = 0177; |
| 775 | break; |
| 776 | |
| 777 | /* carriage return */ |
| 778 | case 6: |
| 779 | ctype = (tp->t_flags >> 12) & 03; |
| 780 | if(ctype == 1) { /* tn 300 */ |
| 781 | c = 5; |
| 782 | } else if(ctype == 2) { /* ti 700 */ |
| 783 | c = 10; |
| 784 | } else if(ctype == 3) { /* concept 100 */ |
| 785 | int i; |
| 786 | for (i= *colp; i<9; i++) |
| 787 | (void) putc(0177, &tp->t_outq); |
| 788 | } |
| 789 | *colp = 0; |
| 790 | } |
| 791 | if(c) |
| 792 | (void) putc(c|0200, &tp->t_outq); |
| 793 | } |
| 794 | |
| 795 | /* |
| 796 | * Restart typewriter output following a delay |
| 797 | * timeout. |
| 798 | * The name of the routine is passed to the timeout |
| 799 | * subroutine and it is called during a clock interrupt. |
| 800 | */ |
| 801 | ttrstrt(tp) |
| 802 | register struct tty *tp; |
| 803 | { |
| 804 | |
| 805 | tp->t_state &= ~TIMEOUT; |
| 806 | ttstart(tp); |
| 807 | } |
| 808 | |
| 809 | /* |
| 810 | * Start output on the typewriter. It is used from the top half |
| 811 | * after some characters have been put on the output queue, |
| 812 | * from the interrupt routine to transmit the next |
| 813 | * character, and after a timeout has finished. |
| 814 | */ |
| 815 | ttstart(tp) |
| 816 | register struct tty *tp; |
| 817 | { |
| 818 | register s; |
| 819 | |
| 820 | s = spl5(); |
| 821 | if((tp->t_state&(TIMEOUT|TTSTOP|BUSY)) == 0) |
| 822 | (*tp->t_oproc)(tp); |
| 823 | splx(s); |
| 824 | } |
| 825 | |
| 826 | /* |
| 827 | * Called from device's read routine after it has |
| 828 | * calculated the tty-structure given as argument. |
| 829 | */ |
| 830 | ttread(tp) |
| 831 | register struct tty *tp; |
| 832 | { |
| 833 | register s; |
| 834 | |
| 835 | if ((tp->t_state&CARR_ON)==0) |
| 836 | return(-1); |
| 837 | s = spl5(); |
| 838 | if (tp->t_canq.c_cc==0) |
| 839 | while (canon(tp)<0) |
| 840 | if (tp->t_chan==NULL) { |
| 841 | sleep((caddr_t)&tp->t_rawq, TTIPRI); |
| 842 | } else { |
| 843 | splx(s); |
| 844 | return(0); |
| 845 | } |
| 846 | splx(s); |
| 847 | while (tp->t_canq.c_cc && passc(getc(&tp->t_canq))>=0) |
| 848 | ; |
| 849 | return(tp->t_rawq.c_cc+tp->t_canq.c_cc); |
| 850 | } |
| 851 | |
| 852 | /* |
| 853 | * Called from the device's write routine after it has |
| 854 | * calculated the tty-structure given as argument. |
| 855 | */ |
| 856 | caddr_t |
| 857 | ttwrite(tp) |
| 858 | register struct tty *tp; |
| 859 | { |
| 860 | /* |
| 861 | * THE POSITIONING OF CP, CC, AND CE ARE CRITICAL |
| 862 | * AND MUST NOT BE CHANGED WITHOUT PATCHING |
| 863 | * THE 'ASM' INLINES BELOW. WATCH OUT. |
| 864 | */ |
| 865 | register char *cp; |
| 866 | register int cc, ce; |
| 867 | register i; |
| 868 | char obuf[OBUFSIZ]; |
| 869 | |
| 870 | if ((tp->t_state&CARR_ON)==0) |
| 871 | return(NULL); |
| 872 | while (u.u_count) { |
| 873 | cc = MIN(u.u_count, OBUFSIZ); |
| 874 | cp = obuf; |
| 875 | iomove(cp, (unsigned)cc, B_WRITE); |
| 876 | if (u.u_error) |
| 877 | break; |
| 878 | (void) spl5(); |
| 879 | while (tp->t_outq.c_cc > TTHIWAT) { |
| 880 | ttstart(tp); |
| 881 | tp->t_state |= ASLEEP; |
| 882 | if (tp->t_chan) { |
| 883 | u.u_base -= cc; |
| 884 | u.u_offset -= cc; |
| 885 | u.u_count += cc; |
| 886 | (void) spl0(); |
| 887 | return((caddr_t)&tp->t_outq); |
| 888 | } |
| 889 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
| 890 | } |
| 891 | (void) spl0(); |
| 892 | if (tp->t_flags&LCASE) { |
| 893 | while (cc--) |
| 894 | ttyoutput(*cp++,tp); |
| 895 | continue; |
| 896 | } |
| 897 | while (cc) { |
| 898 | if (tp->t_flags&RAW) |
| 899 | ce=cc; |
| 900 | else { |
| 901 | #ifdef VAX |
| 902 | asm(" scanc r9,(r10),_partab,$077"); |
| 903 | asm(" subl3 r0,r9,r8"); |
| 904 | #else |
| 905 | ce=0; |
| 906 | while(((partab[*(cp+ce)]&077)==0)&&(ce<cc)) |
| 907 | ce++; |
| 908 | #endif |
| 909 | if (ce==0) { |
| 910 | ttyoutput(*cp++,tp); |
| 911 | cc--; |
| 912 | goto check; |
| 913 | } |
| 914 | } |
| 915 | i=b_to_q(cp,ce,&tp->t_outq); |
| 916 | ce-=i; |
| 917 | tk_nout+=ce; |
| 918 | tp->t_col+=ce; |
| 919 | cp+=ce; |
| 920 | cc-=ce; |
| 921 | check: |
| 922 | if (tp->t_outq.c_cc > TTHIWAT) { |
| 923 | (void) spl5(); |
| 924 | while (tp->t_outq.c_cc > TTHIWAT) { |
| 925 | ttstart(tp); |
| 926 | tp->t_state |= ASLEEP; |
| 927 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
| 928 | } |
| 929 | (void) spl0(); |
| 930 | } |
| 931 | } |
| 932 | } |
| 933 | ttstart(tp); |
| 934 | return(NULL); |
| 935 | } |