| 1 | /* tty.c 3.15 %G% */ |
| 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 | #include "../h/dk.h" |
| 19 | |
| 20 | char partab[]; |
| 21 | |
| 22 | /* |
| 23 | * When running dz's using only SAE (silo alarm) on input |
| 24 | * it is necessary to call dzrint() at clock interrupt time. |
| 25 | * This is unsafe unless spl5()s in tty code are changed to |
| 26 | * spl6()s to block clock interrupts. Note that the dh driver |
| 27 | * currently in use works the same way as the dz, even though |
| 28 | * we could try to more intelligently manage its silo. |
| 29 | * Thus don't take this out if you have no dz's unless you |
| 30 | * change clock.c and dhtimer(). |
| 31 | */ |
| 32 | #define spl5 spl6 |
| 33 | |
| 34 | /* |
| 35 | * Input mapping table-- if an entry is non-zero, when the |
| 36 | * corresponding character is typed preceded by "\" the escape |
| 37 | * sequence is replaced by the table value. Mostly used for |
| 38 | * upper-case only terminals. |
| 39 | */ |
| 40 | |
| 41 | char maptab[] ={ |
| 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 | 000,000,000,000,000,000,000,000, |
| 46 | 000,'|',000,000,000,000,000,'`', |
| 47 | '{','}',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 | 000,000,000,000,000,000,000,000, |
| 53 | 000,000,000,000,000,000,'~',000, |
| 54 | 000,'A','B','C','D','E','F','G', |
| 55 | 'H','I','J','K','L','M','N','O', |
| 56 | 'P','Q','R','S','T','U','V','W', |
| 57 | 'X','Y','Z',000,000,000,000,000, |
| 58 | }; |
| 59 | |
| 60 | |
| 61 | /* |
| 62 | * shorthand |
| 63 | */ |
| 64 | #define q1 tp->t_rawq |
| 65 | #define q2 tp->t_canq |
| 66 | #define q3 tp->t_outq |
| 67 | #define q4 tp->t_un.t_ctlq |
| 68 | |
| 69 | #define OBUFSIZ 100 |
| 70 | |
| 71 | /* |
| 72 | * routine called on first teletype open. |
| 73 | * establishes a process group for distribution |
| 74 | * of quits and interrupts from the tty. |
| 75 | */ |
| 76 | ttyopen(dev, tp) |
| 77 | dev_t dev; |
| 78 | register struct tty *tp; |
| 79 | { |
| 80 | register struct proc *pp; |
| 81 | |
| 82 | pp = u.u_procp; |
| 83 | tp->t_dev = dev; |
| 84 | if(pp->p_pgrp == 0) { |
| 85 | u.u_ttyp = tp; |
| 86 | u.u_ttyd = dev; |
| 87 | if (tp->t_pgrp == 0) |
| 88 | tp->t_pgrp = pp->p_pid; |
| 89 | pp->p_pgrp = tp->t_pgrp; |
| 90 | } |
| 91 | tp->t_state &= ~WOPEN; |
| 92 | tp->t_state |= ISOPEN; |
| 93 | tp->t_line = 0; /* conservative */ |
| 94 | } |
| 95 | |
| 96 | /* |
| 97 | * set default control characters. |
| 98 | */ |
| 99 | ttychars(tp) |
| 100 | register struct tty *tp; |
| 101 | { |
| 102 | |
| 103 | tun.t_intrc = CINTR; |
| 104 | tun.t_quitc = CQUIT; |
| 105 | tun.t_startc = CSTART; |
| 106 | tun.t_stopc = CSTOP; |
| 107 | tun.t_eofc = CEOT; |
| 108 | tun.t_brkc = CBRK; |
| 109 | tp->t_erase = CERASE; |
| 110 | tp->t_kill = CKILL; |
| 111 | /* begin local */ |
| 112 | tlun.t_suspc = CTRL(z); |
| 113 | tlun.t_dsuspc = CTRL(y); |
| 114 | tlun.t_rprntc = CTRL(r); |
| 115 | tlun.t_flushc = CTRL(o); |
| 116 | tlun.t_werasc = CTRL(w); |
| 117 | tlun.t_lnextc = CTRL(v); |
| 118 | tlun.t_lintr = CTRL(c); |
| 119 | tlun.t_lerase = CTRL(h); |
| 120 | tlun.t_lkill = CTRL(u); |
| 121 | tp->t_local = 0; |
| 122 | tp->t_lstate = 0; |
| 123 | /* end local */ |
| 124 | } |
| 125 | |
| 126 | /* |
| 127 | * clean tp on last close |
| 128 | */ |
| 129 | ttyclose(tp) |
| 130 | register struct tty *tp; |
| 131 | { |
| 132 | |
| 133 | tp->t_pgrp = 0; |
| 134 | wflushtty(tp); |
| 135 | tp->t_state = 0; |
| 136 | tp->t_line = 0; |
| 137 | } |
| 138 | |
| 139 | /* |
| 140 | * stty/gtty writearound |
| 141 | */ |
| 142 | stty() |
| 143 | { |
| 144 | u.u_arg[2] = u.u_arg[1]; |
| 145 | u.u_arg[1] = TIOCSETP; |
| 146 | ioctl(); |
| 147 | } |
| 148 | |
| 149 | gtty() |
| 150 | { |
| 151 | u.u_arg[2] = u.u_arg[1]; |
| 152 | u.u_arg[1] = TIOCGETP; |
| 153 | ioctl(); |
| 154 | } |
| 155 | |
| 156 | /* |
| 157 | * Do nothing specific version of line |
| 158 | * discipline specific ioctl command. |
| 159 | */ |
| 160 | /*ARGSUSED*/ |
| 161 | nullioctl(tp, cmd, addr) |
| 162 | register struct tty *tp; |
| 163 | caddr_t addr; |
| 164 | { |
| 165 | |
| 166 | return (cmd); |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * ioctl system call |
| 171 | * Check legality, execute common code, and switch out to individual |
| 172 | * device routine. |
| 173 | */ |
| 174 | ioctl() |
| 175 | { |
| 176 | register struct file *fp; |
| 177 | register struct inode *ip; |
| 178 | register struct a { |
| 179 | int fdes; |
| 180 | int cmd; |
| 181 | caddr_t cmarg; |
| 182 | } *uap; |
| 183 | register dev_t dev; |
| 184 | register fmt; |
| 185 | |
| 186 | uap = (struct a *)u.u_ap; |
| 187 | if ((fp = getf(uap->fdes)) == NULL) |
| 188 | return; |
| 189 | if (uap->cmd==FIOCLEX) { |
| 190 | u.u_pofile[uap->fdes] |= EXCLOSE; |
| 191 | return; |
| 192 | } |
| 193 | if (uap->cmd==FIONCLEX) { |
| 194 | u.u_pofile[uap->fdes] &= ~EXCLOSE; |
| 195 | return; |
| 196 | } |
| 197 | ip = fp->f_inode; |
| 198 | fmt = ip->i_mode & IFMT; |
| 199 | if (fmt != IFCHR && fmt != IFMPC) { |
| 200 | /* begin local */ |
| 201 | if (uap->cmd==FIONREAD && (fmt == IFREG || fmt == IFDIR)) { |
| 202 | off_t nread = ip->i_size - fp->f_un.f_offset; |
| 203 | |
| 204 | if (copyout((caddr_t)&nread, uap->cmarg, sizeof(off_t))) |
| 205 | u.u_error = EFAULT; |
| 206 | } else |
| 207 | /* end local */ |
| 208 | u.u_error = ENOTTY; |
| 209 | return; |
| 210 | } |
| 211 | dev = ip->i_un.i_rdev; |
| 212 | u.u_r.r_val1 = 0; |
| 213 | (*cdevsw[major(dev)].d_ioctl)(dev, uap->cmd, uap->cmarg, fp->f_flag); |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * Common code for several tty ioctl commands |
| 218 | */ |
| 219 | ttioccomm(com, tp, addr, dev) |
| 220 | register struct tty *tp; |
| 221 | caddr_t addr; |
| 222 | { |
| 223 | unsigned t; |
| 224 | struct sgttyb iocb; |
| 225 | struct clist tq; |
| 226 | extern int nldisp; |
| 227 | register c; |
| 228 | int temp; |
| 229 | |
| 230 | switch(com) { |
| 231 | |
| 232 | /* |
| 233 | * get discipline number |
| 234 | */ |
| 235 | case TIOCGETD: |
| 236 | t = tp->t_line; |
| 237 | if (copyout((caddr_t)&t, addr, sizeof(t))) |
| 238 | u.u_error = EFAULT; |
| 239 | break; |
| 240 | |
| 241 | /* |
| 242 | * set line discipline |
| 243 | */ |
| 244 | case TIOCSETD: |
| 245 | if (copyin(addr, (caddr_t)&t, sizeof(t))) { |
| 246 | u.u_error = EFAULT; |
| 247 | break; |
| 248 | } |
| 249 | if (t >= nldisp) { |
| 250 | u.u_error = ENXIO; |
| 251 | break; |
| 252 | } |
| 253 | (void) spl5(); |
| 254 | if (tp->t_line) |
| 255 | (*linesw[tp->t_line].l_close)(tp); |
| 256 | if (t) |
| 257 | (*linesw[t].l_open)(dev, tp, addr); |
| 258 | if (u.u_error==0) |
| 259 | tp->t_line = t; |
| 260 | (void) spl0(); |
| 261 | break; |
| 262 | |
| 263 | /* |
| 264 | * prevent more opens on channel |
| 265 | */ |
| 266 | case TIOCEXCL: |
| 267 | tp->t_state |= XCLUDE; |
| 268 | break; |
| 269 | |
| 270 | case TIOCNXCL: |
| 271 | tp->t_state &= ~XCLUDE; |
| 272 | break; |
| 273 | |
| 274 | /* |
| 275 | * Set new parameters |
| 276 | */ |
| 277 | case TIOCSETP: |
| 278 | case TIOCSETN: |
| 279 | if (copyin(addr, (caddr_t)&iocb, sizeof(iocb))) { |
| 280 | u.u_error = EFAULT; |
| 281 | return(1); |
| 282 | } |
| 283 | (void) spl5(); |
| 284 | if (tp->t_line == 0) { |
| 285 | if (com == TIOCSETP) |
| 286 | wflushtty(tp); |
| 287 | while (canon(tp)>=0) |
| 288 | ; |
| 289 | } else if (tp->t_line == NTTYDISC) { |
| 290 | if (tp->t_flags&RAW || iocb.sg_flags&RAW || |
| 291 | com == TIOCSETP) |
| 292 | wflushtty(tp); |
| 293 | else if ((tp->t_flags&CBREAK) != (iocb.sg_flags&CBREAK)) { |
| 294 | if (iocb.sg_flags & CBREAK) { |
| 295 | catq(&tp->t_rawq, &tp->t_canq); |
| 296 | tq = tp->t_rawq; |
| 297 | tp->t_rawq = tp->t_canq; |
| 298 | tp->t_canq = tq; |
| 299 | } else { |
| 300 | tp->t_local |= LPENDIN; |
| 301 | if (tp->t_canq.c_cc) |
| 302 | panic("ioccom canq"); |
| 303 | if (tp->t_chan) |
| 304 | (void) sdata(tp->t_chan); |
| 305 | else |
| 306 | wakeup((caddr_t)&tp->t_rawq); |
| 307 | } |
| 308 | } |
| 309 | } |
| 310 | if ((tp->t_state&SPEEDS)==0) { |
| 311 | tp->t_ispeed = iocb.sg_ispeed; |
| 312 | tp->t_ospeed = iocb.sg_ospeed; |
| 313 | } |
| 314 | tp->t_erase = iocb.sg_erase; |
| 315 | tp->t_kill = iocb.sg_kill; |
| 316 | tp->t_flags = iocb.sg_flags; |
| 317 | (void) spl0(); |
| 318 | break; |
| 319 | |
| 320 | /* |
| 321 | * send current parameters to user |
| 322 | */ |
| 323 | case TIOCGETP: |
| 324 | iocb.sg_ispeed = tp->t_ispeed; |
| 325 | iocb.sg_ospeed = tp->t_ospeed; |
| 326 | iocb.sg_erase = tp->t_erase; |
| 327 | iocb.sg_kill = tp->t_kill; |
| 328 | iocb.sg_flags = tp->t_flags; |
| 329 | if (copyout((caddr_t)&iocb, addr, sizeof(iocb))) |
| 330 | u.u_error = EFAULT; |
| 331 | break; |
| 332 | |
| 333 | /* |
| 334 | * Hang up line on last close |
| 335 | */ |
| 336 | |
| 337 | case TIOCHPCL: |
| 338 | tp->t_state |= HUPCLS; |
| 339 | break; |
| 340 | |
| 341 | case TIOCFLUSH: |
| 342 | flushtty(tp, FREAD|FWRITE); |
| 343 | break; |
| 344 | |
| 345 | /* |
| 346 | * ioctl entries to line discipline |
| 347 | */ |
| 348 | case DIOCSETP: |
| 349 | case DIOCGETP: |
| 350 | if ((*linesw[tp->t_line].l_ioctl)(com, tp, addr)) |
| 351 | u.u_error = ENOTTY; |
| 352 | break; |
| 353 | |
| 354 | /* |
| 355 | * set and fetch special characters |
| 356 | */ |
| 357 | case TIOCSETC: |
| 358 | if (copyin(addr, (caddr_t)&tun, sizeof(struct tchars))) |
| 359 | u.u_error = EFAULT; |
| 360 | break; |
| 361 | |
| 362 | case TIOCGETC: |
| 363 | if (copyout((caddr_t)&tun, addr, sizeof(struct tchars))) |
| 364 | u.u_error = EFAULT; |
| 365 | break; |
| 366 | |
| 367 | /* local ioctls */ |
| 368 | case TIOCSLTC: |
| 369 | if (copyin(addr, (caddr_t)&tlun, sizeof (struct ltchars))) |
| 370 | u.u_error = EFAULT; |
| 371 | break; |
| 372 | |
| 373 | case TIOCGLTC: |
| 374 | if (copyout((caddr_t)&tlun, addr, sizeof (struct ltchars))) |
| 375 | u.u_error = EFAULT; |
| 376 | break; |
| 377 | |
| 378 | case FIONREAD: { |
| 379 | off_t nread; |
| 380 | |
| 381 | switch (tp->t_line) { |
| 382 | |
| 383 | case NETLDISC: |
| 384 | nread = tp->t_rec ? tp->t_inbuf : 0; |
| 385 | break; |
| 386 | |
| 387 | case NTTYDISC: |
| 388 | nread = tp->t_canq.c_cc; |
| 389 | if (tp->t_flags & (RAW|CBREAK)) |
| 390 | nread += tp->t_rawq.c_cc; |
| 391 | break; |
| 392 | |
| 393 | case 0: |
| 394 | /* do something here ... */ |
| 395 | ; |
| 396 | } |
| 397 | if (copyout((caddr_t)&nread, addr, sizeof (off_t))) |
| 398 | u.u_error = EFAULT; |
| 399 | break; |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * Should allow SPGRP and GPGRP only if tty open for reading. |
| 404 | */ |
| 405 | case TIOCSPGRP: |
| 406 | if (copyin(addr, (caddr_t)&tp->t_pgrp, sizeof (tp->t_pgrp))) |
| 407 | u.u_error = EFAULT; |
| 408 | break; |
| 409 | |
| 410 | case TIOCGPGRP: |
| 411 | if (copyout((caddr_t)&tp->t_pgrp, addr, sizeof(tp->t_pgrp))) |
| 412 | u.u_error = EFAULT; |
| 413 | break; |
| 414 | |
| 415 | /* |
| 416 | * Modify local mode word. |
| 417 | */ |
| 418 | case TIOCLBIS: |
| 419 | if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local))) |
| 420 | u.u_error = EFAULT; |
| 421 | else |
| 422 | tp->t_local |= temp; |
| 423 | break; |
| 424 | |
| 425 | case TIOCLBIC: |
| 426 | if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local))) |
| 427 | u.u_error = EFAULT; |
| 428 | else |
| 429 | tp->t_local &= ~temp; |
| 430 | break; |
| 431 | |
| 432 | case TIOCLSET: |
| 433 | if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local))) |
| 434 | u.u_error = EFAULT; |
| 435 | else |
| 436 | tp->t_local = temp; |
| 437 | break; |
| 438 | |
| 439 | case TIOCLGET: |
| 440 | if (copyout((caddr_t)&tp->t_local, addr, sizeof(tp->t_local))) |
| 441 | u.u_error = EFAULT; |
| 442 | break; |
| 443 | |
| 444 | case TIOCOUTQ: |
| 445 | if (copyout((caddr_t)&tp->t_outq.c_cc, addr, sizeof(tp->t_outq.c_cc))) |
| 446 | u.u_error = EFAULT; |
| 447 | break; |
| 448 | |
| 449 | case TIOCSTI: |
| 450 | c = fubyte(addr); |
| 451 | if (u.u_uid && u.u_ttyp != tp || c < 0) |
| 452 | u.u_error = EFAULT; |
| 453 | else |
| 454 | (*linesw[tp->t_line].l_rint)(c, tp); |
| 455 | break; |
| 456 | /* end of locals */ |
| 457 | |
| 458 | default: |
| 459 | return(0); |
| 460 | } |
| 461 | return(1); |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * Wait for output to drain, then flush input waiting. |
| 466 | */ |
| 467 | wflushtty(tp) |
| 468 | register struct tty *tp; |
| 469 | { |
| 470 | |
| 471 | (void) spl5(); |
| 472 | while (tp->t_outq.c_cc && tp->t_state&CARR_ON) { |
| 473 | (*tp->t_oproc)(tp); |
| 474 | tp->t_state |= ASLEEP; |
| 475 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
| 476 | } |
| 477 | flushtty(tp, FREAD|FWRITE); |
| 478 | (void) spl0(); |
| 479 | } |
| 480 | |
| 481 | /* |
| 482 | * flush all TTY queues |
| 483 | */ |
| 484 | flushtty(tp, rw) |
| 485 | register struct tty *tp; |
| 486 | { |
| 487 | register s; |
| 488 | |
| 489 | if (tp->t_line == NETLDISC) |
| 490 | return; |
| 491 | s = spl6(); |
| 492 | if (rw & FREAD) { |
| 493 | while (getc(&tp->t_canq) >= 0) |
| 494 | ; |
| 495 | wakeup((caddr_t)&tp->t_rawq); |
| 496 | } |
| 497 | if (rw & FWRITE) { |
| 498 | wakeup((caddr_t)&tp->t_outq); |
| 499 | tp->t_state &= ~TTSTOP; |
| 500 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); |
| 501 | while (getc(&tp->t_outq) >= 0) |
| 502 | ; |
| 503 | } |
| 504 | if (rw & FREAD) { |
| 505 | while (getc(&tp->t_rawq) >= 0) |
| 506 | ; |
| 507 | tp->t_delct = 0; |
| 508 | tp->t_rocount = 0; /* local */ |
| 509 | tp->t_rocol = 0; |
| 510 | tp->t_lstate = 0; |
| 511 | } |
| 512 | splx(s); |
| 513 | } |
| 514 | |
| 515 | |
| 516 | |
| 517 | /* |
| 518 | * transfer raw input list to canonical list, |
| 519 | * doing erase-kill processing and handling escapes. |
| 520 | * It waits until a full line has been typed in cooked mode, |
| 521 | * or until any character has been typed in raw mode. |
| 522 | */ |
| 523 | canon(tp) |
| 524 | register struct tty *tp; |
| 525 | { |
| 526 | register char *bp; |
| 527 | char *bp1; |
| 528 | register int c; |
| 529 | int mc; |
| 530 | int s; |
| 531 | |
| 532 | if ((tp->t_flags&(RAW|CBREAK))==0 && tp->t_delct==0 |
| 533 | || (tp->t_flags&(RAW|CBREAK))!=0 && tp->t_rawq.c_cc==0) { |
| 534 | return(-1); |
| 535 | } |
| 536 | s = spl0(); |
| 537 | loop: |
| 538 | bp = &canonb[2]; |
| 539 | while ((c=getc(&tp->t_rawq)) >= 0) { |
| 540 | if ((tp->t_flags&(RAW|CBREAK))==0) { |
| 541 | if (c==0377) { |
| 542 | tp->t_delct--; |
| 543 | break; |
| 544 | } |
| 545 | if (bp[-1]!='\\') { |
| 546 | if (c==tp->t_erase) { |
| 547 | if (bp > &canonb[2]) |
| 548 | bp--; |
| 549 | continue; |
| 550 | } |
| 551 | if (c==tp->t_kill) |
| 552 | goto loop; |
| 553 | if (c==tun.t_eofc) |
| 554 | continue; |
| 555 | } else { |
| 556 | mc = maptab[c]; |
| 557 | if (c==tp->t_erase || c==tp->t_kill) |
| 558 | mc = c; |
| 559 | if (mc && (mc==c || (tp->t_flags&LCASE))) { |
| 560 | if (bp[-2] != '\\') |
| 561 | c = mc; |
| 562 | bp--; |
| 563 | } |
| 564 | } |
| 565 | } |
| 566 | *bp++ = c; |
| 567 | if (bp>=canonb+CANBSIZ) |
| 568 | break; |
| 569 | } |
| 570 | bp1 = &canonb[2]; |
| 571 | (void) b_to_q(bp1, bp-bp1, &tp->t_canq); |
| 572 | |
| 573 | if (tp->t_state&TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { |
| 574 | if (putc(tun.t_startc, &tp->t_outq)==0) { |
| 575 | tp->t_state &= ~TBLOCK; |
| 576 | ttstart(tp); |
| 577 | } |
| 578 | tp->t_char = 0; |
| 579 | } |
| 580 | |
| 581 | splx(s); |
| 582 | return(0); |
| 583 | } |
| 584 | |
| 585 | |
| 586 | /* |
| 587 | * block transfer input handler. |
| 588 | */ |
| 589 | ttyrend(tp, pb, pe) |
| 590 | register struct tty *tp; |
| 591 | register char *pb, *pe; |
| 592 | { |
| 593 | int tandem; |
| 594 | |
| 595 | tandem = tp->t_flags&TANDEM; |
| 596 | if (tp->t_flags&RAW) { |
| 597 | (void) b_to_q(pb, pe-pb, &tp->t_rawq); |
| 598 | if (tp->t_chan) |
| 599 | (void) sdata(tp->t_chan); else |
| 600 | wakeup((caddr_t)&tp->t_rawq); |
| 601 | } else { |
| 602 | tp->t_flags &= ~TANDEM; |
| 603 | while (pb < pe) |
| 604 | ttyinput(*pb++, tp); |
| 605 | tp->t_flags |= tandem; |
| 606 | } |
| 607 | if (tandem) |
| 608 | ttyblock(tp); |
| 609 | } |
| 610 | |
| 611 | /* |
| 612 | * Place a character on raw TTY input queue, putting in delimiters |
| 613 | * and waking up top half as needed. |
| 614 | * Also echo if required. |
| 615 | * The arguments are the character and the appropriate |
| 616 | * tty structure. |
| 617 | */ |
| 618 | ttyinput(c, tp) |
| 619 | register c; |
| 620 | register struct tty *tp; |
| 621 | { |
| 622 | register int t_flags; |
| 623 | register struct chan *cp; |
| 624 | |
| 625 | tk_nin += 1; |
| 626 | c &= 0377; |
| 627 | t_flags = tp->t_flags; |
| 628 | if (t_flags&TANDEM) |
| 629 | ttyblock(tp); |
| 630 | if ((t_flags&RAW)==0) { |
| 631 | c &= 0177; |
| 632 | if (tp->t_state&TTSTOP) { |
| 633 | if (c==tun.t_startc) { |
| 634 | tp->t_state &= ~TTSTOP; |
| 635 | ttstart(tp); |
| 636 | return; |
| 637 | } |
| 638 | if (c==tun.t_stopc) |
| 639 | return; |
| 640 | tp->t_state &= ~TTSTOP; |
| 641 | ttstart(tp); |
| 642 | } else { |
| 643 | if (c==tun.t_stopc) { |
| 644 | tp->t_state |= TTSTOP; |
| 645 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); |
| 646 | return; |
| 647 | } |
| 648 | if (c==tun.t_startc) |
| 649 | return; |
| 650 | } |
| 651 | if (c==tun.t_quitc || c==tun.t_intrc) { |
| 652 | flushtty(tp, FREAD|FWRITE); |
| 653 | c = (c==tun.t_intrc) ? SIGINT:SIGQUIT; |
| 654 | if (tp->t_chan) |
| 655 | scontrol(tp->t_chan, M_SIG, c); |
| 656 | else |
| 657 | gsignal(tp->t_pgrp, c); |
| 658 | return; |
| 659 | } |
| 660 | if (c=='\r' && t_flags&CRMOD) |
| 661 | c = '\n'; |
| 662 | } |
| 663 | if (tp->t_rawq.c_cc>TTYHOG) { |
| 664 | flushtty(tp, FREAD|FWRITE); |
| 665 | return; |
| 666 | } |
| 667 | if (t_flags&LCASE && c>='A' && c<='Z') |
| 668 | c += 'a'-'A'; |
| 669 | (void) putc(c, &tp->t_rawq); |
| 670 | if (t_flags&(RAW|CBREAK)||(c=='\n'||c==tun.t_eofc||c==tun.t_brkc)) { |
| 671 | if ((t_flags&(RAW|CBREAK))==0 && putc(0377, &tp->t_rawq)==0) |
| 672 | tp->t_delct++; |
| 673 | if ((cp=tp->t_chan)!=NULL) |
| 674 | (void) sdata(cp); else |
| 675 | wakeup((caddr_t)&tp->t_rawq); |
| 676 | } |
| 677 | if (t_flags&ECHO) { |
| 678 | ttyoutput(c, tp); |
| 679 | if (c==tp->t_kill && (t_flags&(RAW|CBREAK))==0) |
| 680 | ttyoutput('\n', tp); |
| 681 | ttstart(tp); |
| 682 | } |
| 683 | } |
| 684 | |
| 685 | |
| 686 | /* |
| 687 | * Send stop character on input overflow. |
| 688 | */ |
| 689 | ttyblock(tp) |
| 690 | register struct tty *tp; |
| 691 | { |
| 692 | register x; |
| 693 | x = q1.c_cc + q2.c_cc; |
| 694 | if (q1.c_cc > TTYHOG) { |
| 695 | flushtty(tp, FREAD|FWRITE); |
| 696 | tp->t_state &= ~TBLOCK; |
| 697 | } |
| 698 | if (x >= TTYHOG/2) { |
| 699 | if (putc(tun.t_stopc, &tp->t_outq)==0) { |
| 700 | tp->t_state |= TBLOCK; |
| 701 | tp->t_char++; |
| 702 | ttstart(tp); |
| 703 | } |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | /* |
| 708 | * put character on TTY output queue, adding delays, |
| 709 | * expanding tabs, and handling the CR/NL bit. |
| 710 | * It is called both from the top half for output, and from |
| 711 | * interrupt level for echoing. |
| 712 | * The arguments are the character and the tty structure. |
| 713 | */ |
| 714 | ttyoutput(c, tp) |
| 715 | register c; |
| 716 | register struct tty *tp; |
| 717 | { |
| 718 | register char *colp; |
| 719 | register ctype; |
| 720 | |
| 721 | /* |
| 722 | * Ignore EOT in normal mode to avoid hanging up |
| 723 | * certain terminals. |
| 724 | * In raw mode dump the char unchanged. |
| 725 | */ |
| 726 | if ((tp->t_flags&RAW)==0) { |
| 727 | c &= 0177; |
| 728 | if ((tp->t_flags&CBREAK)==0 && c==CEOT) |
| 729 | return; |
| 730 | } else { |
| 731 | tk_nout++; |
| 732 | (void) putc(c, &tp->t_outq); |
| 733 | return; |
| 734 | } |
| 735 | |
| 736 | /* |
| 737 | * Turn tabs to spaces as required |
| 738 | */ |
| 739 | if (c=='\t' && (tp->t_flags&TBDELAY)==XTABS) { |
| 740 | c = 8 - (tp->t_col & 7); |
| 741 | (void) b_to_q(" ", c, &tp->t_outq); |
| 742 | tp->t_col += c; |
| 743 | tk_nout += c; |
| 744 | return; |
| 745 | } |
| 746 | tk_nout++; |
| 747 | /* |
| 748 | * for upper-case-only terminals, |
| 749 | * generate escapes. |
| 750 | */ |
| 751 | if (tp->t_flags&LCASE) { |
| 752 | colp = "({)}!|^~'`"; |
| 753 | while(*colp++) |
| 754 | if(c == *colp++) { |
| 755 | ttyoutput('\\', tp); |
| 756 | c = colp[-2]; |
| 757 | break; |
| 758 | } |
| 759 | if ('a'<=c && c<='z') |
| 760 | c += 'A' - 'a'; |
| 761 | } |
| 762 | /* |
| 763 | * turn <nl> to <cr><lf> if desired. |
| 764 | */ |
| 765 | if (c=='\n' && tp->t_flags&CRMOD) |
| 766 | ttyoutput('\r', tp); |
| 767 | (void) putc(c, &tp->t_outq); |
| 768 | /* |
| 769 | * Calculate delays. |
| 770 | * The numbers here represent clock ticks |
| 771 | * and are not necessarily optimal for all terminals. |
| 772 | * The delays are indicated by characters above 0200. |
| 773 | * In raw mode there are no delays and the |
| 774 | * transmission path is 8 bits wide. |
| 775 | */ |
| 776 | colp = &tp->t_col; |
| 777 | ctype = partab[c]; |
| 778 | c = 0; |
| 779 | switch (ctype&077) { |
| 780 | |
| 781 | /* ordinary */ |
| 782 | case 0: |
| 783 | (*colp)++; |
| 784 | |
| 785 | /* non-printing */ |
| 786 | case 1: |
| 787 | break; |
| 788 | |
| 789 | /* backspace */ |
| 790 | case 2: |
| 791 | if (*colp) |
| 792 | (*colp)--; |
| 793 | break; |
| 794 | |
| 795 | /* newline */ |
| 796 | case 3: |
| 797 | ctype = (tp->t_flags >> 8) & 03; |
| 798 | if(ctype == 1) { /* tty 37 */ |
| 799 | if (*colp) |
| 800 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); |
| 801 | } else |
| 802 | if(ctype == 2) { /* vt05 */ |
| 803 | c = 6; |
| 804 | } |
| 805 | *colp = 0; |
| 806 | break; |
| 807 | |
| 808 | /* tab */ |
| 809 | case 4: |
| 810 | ctype = (tp->t_flags >> 10) & 03; |
| 811 | if(ctype == 1) { /* tty 37 */ |
| 812 | c = 1 - (*colp | ~07); |
| 813 | if(c < 5) |
| 814 | c = 0; |
| 815 | } |
| 816 | *colp |= 07; |
| 817 | (*colp)++; |
| 818 | break; |
| 819 | |
| 820 | /* vertical motion */ |
| 821 | case 5: |
| 822 | if(tp->t_flags & VTDELAY) /* tty 37 */ |
| 823 | c = 0177; |
| 824 | break; |
| 825 | |
| 826 | /* carriage return */ |
| 827 | case 6: |
| 828 | ctype = (tp->t_flags >> 12) & 03; |
| 829 | if(ctype == 1) { /* tn 300 */ |
| 830 | c = 5; |
| 831 | } else if(ctype == 2) { /* ti 700 */ |
| 832 | c = 10; |
| 833 | } else if(ctype == 3) { /* concept 100 */ |
| 834 | int i; |
| 835 | if ((i = *colp) >= 0) |
| 836 | for (; i<9; i++) |
| 837 | (void) putc(0177, &tp->t_outq); |
| 838 | } |
| 839 | *colp = 0; |
| 840 | } |
| 841 | if(c) |
| 842 | (void) putc(c|0200, &tp->t_outq); |
| 843 | } |
| 844 | |
| 845 | /* |
| 846 | * Restart typewriter output following a delay |
| 847 | * timeout. |
| 848 | * The name of the routine is passed to the timeout |
| 849 | * subroutine and it is called during a clock interrupt. |
| 850 | */ |
| 851 | ttrstrt(tp) |
| 852 | register struct tty *tp; |
| 853 | { |
| 854 | |
| 855 | tp->t_state &= ~TIMEOUT; |
| 856 | ttstart(tp); |
| 857 | } |
| 858 | |
| 859 | /* |
| 860 | * Start output on the typewriter. It is used from the top half |
| 861 | * after some characters have been put on the output queue, |
| 862 | * from the interrupt routine to transmit the next |
| 863 | * character, and after a timeout has finished. |
| 864 | */ |
| 865 | ttstart(tp) |
| 866 | register struct tty *tp; |
| 867 | { |
| 868 | register s; |
| 869 | |
| 870 | s = spl5(); |
| 871 | if((tp->t_state&(TIMEOUT|TTSTOP|BUSY)) == 0) |
| 872 | (*tp->t_oproc)(tp); |
| 873 | splx(s); |
| 874 | } |
| 875 | |
| 876 | /* |
| 877 | * Called from device's read routine after it has |
| 878 | * calculated the tty-structure given as argument. |
| 879 | */ |
| 880 | ttread(tp) |
| 881 | register struct tty *tp; |
| 882 | { |
| 883 | register s; |
| 884 | |
| 885 | if ((tp->t_state&CARR_ON)==0) |
| 886 | return(-1); |
| 887 | s = spl5(); |
| 888 | if (tp->t_canq.c_cc==0) |
| 889 | while (canon(tp)<0) |
| 890 | if (tp->t_chan==NULL) { |
| 891 | sleep((caddr_t)&tp->t_rawq, TTIPRI); |
| 892 | } else { |
| 893 | splx(s); |
| 894 | return(0); |
| 895 | } |
| 896 | splx(s); |
| 897 | while (tp->t_canq.c_cc && passc(getc(&tp->t_canq))>=0) |
| 898 | ; |
| 899 | return(tp->t_rawq.c_cc+tp->t_canq.c_cc); |
| 900 | } |
| 901 | |
| 902 | /* |
| 903 | * Called from the device's write routine after it has |
| 904 | * calculated the tty-structure given as argument. |
| 905 | */ |
| 906 | caddr_t |
| 907 | ttwrite(tp) |
| 908 | register struct tty *tp; |
| 909 | { |
| 910 | /* |
| 911 | * THE POSITIONING OF CP, CC, AND CE ARE CRITICAL |
| 912 | * AND MUST NOT BE CHANGED WITHOUT PATCHING |
| 913 | * THE 'ASM' INLINES BELOW. WATCH OUT. |
| 914 | */ |
| 915 | register char *cp; |
| 916 | register int cc, ce; |
| 917 | register i; |
| 918 | char obuf[OBUFSIZ]; |
| 919 | |
| 920 | if ((tp->t_state&CARR_ON)==0) |
| 921 | return(NULL); |
| 922 | while (u.u_count) { |
| 923 | cc = MIN(u.u_count, OBUFSIZ); |
| 924 | cp = obuf; |
| 925 | iomove(cp, (unsigned)cc, B_WRITE); |
| 926 | if (u.u_error) |
| 927 | break; |
| 928 | (void) spl5(); |
| 929 | while (tp->t_outq.c_cc > TTHIWAT) { |
| 930 | ttstart(tp); |
| 931 | tp->t_state |= ASLEEP; |
| 932 | if (tp->t_chan) { |
| 933 | u.u_base -= cc; |
| 934 | u.u_offset -= cc; |
| 935 | u.u_count += cc; |
| 936 | (void) spl0(); |
| 937 | return((caddr_t)&tp->t_outq); |
| 938 | } |
| 939 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
| 940 | } |
| 941 | (void) spl0(); |
| 942 | if (tp->t_flags&LCASE) { |
| 943 | while (cc--) |
| 944 | ttyoutput(*cp++,tp); |
| 945 | continue; |
| 946 | } |
| 947 | while (cc) { |
| 948 | if (tp->t_flags&RAW) |
| 949 | ce=cc; |
| 950 | else { |
| 951 | #ifdef VAX |
| 952 | asm(" scanc r9,(r10),_partab,$077"); |
| 953 | asm(" subl3 r0,r9,r8"); |
| 954 | #else |
| 955 | ce=0; |
| 956 | while(((partab[*(cp+ce)]&077)==0)&&(ce<cc)) |
| 957 | ce++; |
| 958 | #endif |
| 959 | if (ce==0) { |
| 960 | ttyoutput(*cp++,tp); |
| 961 | cc--; |
| 962 | goto check; |
| 963 | } |
| 964 | } |
| 965 | i=b_to_q(cp,ce,&tp->t_outq); |
| 966 | ce-=i; |
| 967 | tk_nout+=ce; |
| 968 | tp->t_col+=ce; |
| 969 | cp+=ce; |
| 970 | cc-=ce; |
| 971 | check: |
| 972 | if (tp->t_outq.c_cc > TTHIWAT) { |
| 973 | (void) spl5(); |
| 974 | while (tp->t_outq.c_cc > TTHIWAT) { |
| 975 | ttstart(tp); |
| 976 | tp->t_state |= ASLEEP; |
| 977 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
| 978 | } |
| 979 | (void) spl0(); |
| 980 | } |
| 981 | } |
| 982 | } |
| 983 | ttstart(tp); |
| 984 | return(NULL); |
| 985 | } |