| 1 | /* tty.c 4.31 82/10/17 */ |
| 2 | |
| 3 | /* |
| 4 | * TTY subroutines common to more than one line discipline |
| 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/inode.h" |
| 13 | #include "../h/file.h" |
| 14 | #include "../h/reg.h" |
| 15 | #include "../h/conf.h" |
| 16 | #include "../h/buf.h" |
| 17 | #include "../h/dk.h" |
| 18 | #include "../h/uio.h" |
| 19 | #include "../h/kernel.h" |
| 20 | |
| 21 | /* |
| 22 | * Table giving parity for characters and indicating |
| 23 | * character classes to tty driver. In particular, |
| 24 | * if the low 6 bits are 0, then the character needs |
| 25 | * no special processing on output. |
| 26 | */ |
| 27 | |
| 28 | char partab[] = { |
| 29 | 0001,0201,0201,0001,0201,0001,0001,0201, |
| 30 | 0202,0004,0003,0201,0005,0206,0201,0001, |
| 31 | 0201,0001,0001,0201,0001,0201,0201,0001, |
| 32 | 0001,0201,0201,0001,0201,0001,0001,0201, |
| 33 | 0200,0000,0000,0200,0000,0200,0200,0000, |
| 34 | 0000,0200,0200,0000,0200,0000,0000,0200, |
| 35 | 0000,0200,0200,0000,0200,0000,0000,0200, |
| 36 | 0200,0000,0000,0200,0000,0200,0200,0000, |
| 37 | 0200,0000,0000,0200,0000,0200,0200,0000, |
| 38 | 0000,0200,0200,0000,0200,0000,0000,0200, |
| 39 | 0000,0200,0200,0000,0200,0000,0000,0200, |
| 40 | 0200,0000,0000,0200,0000,0200,0200,0000, |
| 41 | 0000,0200,0200,0000,0200,0000,0000,0200, |
| 42 | 0200,0000,0000,0200,0000,0200,0200,0000, |
| 43 | 0200,0000,0000,0200,0000,0200,0200,0000, |
| 44 | 0000,0200,0200,0000,0200,0000,0000,0201, |
| 45 | |
| 46 | /* |
| 47 | * 7 bit ascii ends with the last character above, |
| 48 | * but we contine through all 256 codes for the sake |
| 49 | * of the tty output routines which use special vax |
| 50 | * instructions which need a 256 character trt table. |
| 51 | */ |
| 52 | |
| 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 | 0007,0007,0007,0007,0007,0007,0007,0007 |
| 69 | }; |
| 70 | |
| 71 | /* |
| 72 | * Input mapping table-- if an entry is non-zero, when the |
| 73 | * corresponding character is typed preceded by "\" the escape |
| 74 | * sequence is replaced by the table value. Mostly used for |
| 75 | * upper-case only terminals. |
| 76 | */ |
| 77 | |
| 78 | char maptab[] ={ |
| 79 | 000,000,000,000,000,000,000,000, |
| 80 | 000,000,000,000,000,000,000,000, |
| 81 | 000,000,000,000,000,000,000,000, |
| 82 | 000,000,000,000,000,000,000,000, |
| 83 | 000,'|',000,000,000,000,000,'`', |
| 84 | '{','}',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 | 000,000,000,000,000,000,000,000, |
| 89 | 000,000,000,000,000,000,000,000, |
| 90 | 000,000,000,000,000,000,'~',000, |
| 91 | 000,'A','B','C','D','E','F','G', |
| 92 | 'H','I','J','K','L','M','N','O', |
| 93 | 'P','Q','R','S','T','U','V','W', |
| 94 | 'X','Y','Z',000,000,000,000,000, |
| 95 | }; |
| 96 | |
| 97 | short tthiwat[16] = |
| 98 | { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,650,650 }; |
| 99 | short ttlowat[16] = |
| 100 | { 30, 30, 30, 30, 30, 30, 30, 50, 50,120,120,120,125,125,125,125 }; |
| 101 | |
| 102 | #define OBUFSIZ 100 |
| 103 | |
| 104 | /* |
| 105 | * set default control characters. |
| 106 | */ |
| 107 | ttychars(tp) |
| 108 | register struct tty *tp; |
| 109 | { |
| 110 | |
| 111 | tun.t_intrc = CINTR; |
| 112 | tun.t_quitc = CQUIT; |
| 113 | tun.t_startc = CSTART; |
| 114 | tun.t_stopc = CSTOP; |
| 115 | tun.t_eofc = CEOT; |
| 116 | tun.t_brkc = CBRK; |
| 117 | tp->t_erase = CERASE; |
| 118 | tp->t_kill = CKILL; |
| 119 | /* begin local */ |
| 120 | tlun.t_suspc = CTRL(z); |
| 121 | tlun.t_dsuspc = CTRL(y); |
| 122 | tlun.t_rprntc = CTRL(r); |
| 123 | tlun.t_flushc = CTRL(o); |
| 124 | tlun.t_werasc = CTRL(w); |
| 125 | tlun.t_lnextc = CTRL(v); |
| 126 | tp->t_local = 0; |
| 127 | tp->t_lstate = 0; |
| 128 | /* end local */ |
| 129 | } |
| 130 | |
| 131 | /* |
| 132 | * Wait for output to drain, then flush input waiting. |
| 133 | */ |
| 134 | wflushtty(tp) |
| 135 | register struct tty *tp; |
| 136 | { |
| 137 | |
| 138 | (void) spl5(); |
| 139 | while (tp->t_outq.c_cc && tp->t_state&TS_CARR_ON |
| 140 | && tp->t_oproc) { /* kludge for pty */ |
| 141 | (*tp->t_oproc)(tp); |
| 142 | tp->t_state |= TS_ASLEEP; |
| 143 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
| 144 | } |
| 145 | flushtty(tp, FREAD); |
| 146 | (void) spl0(); |
| 147 | } |
| 148 | |
| 149 | /* |
| 150 | * flush all TTY queues |
| 151 | */ |
| 152 | flushtty(tp, rw) |
| 153 | register struct tty *tp; |
| 154 | { |
| 155 | register s; |
| 156 | |
| 157 | s = spl6(); |
| 158 | if (rw & FREAD) { |
| 159 | while (getc(&tp->t_canq) >= 0) |
| 160 | ; |
| 161 | wakeup((caddr_t)&tp->t_rawq); |
| 162 | } |
| 163 | if (rw & FWRITE) { |
| 164 | wakeup((caddr_t)&tp->t_outq); |
| 165 | tp->t_state &= ~TS_TTSTOP; |
| 166 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw); |
| 167 | while (getc(&tp->t_outq) >= 0) |
| 168 | ; |
| 169 | } |
| 170 | if (rw & FREAD) { |
| 171 | while (getc(&tp->t_rawq) >= 0) |
| 172 | ; |
| 173 | tp->t_delct = 0; |
| 174 | tp->t_rocount = 0; /* local */ |
| 175 | tp->t_rocol = 0; |
| 176 | tp->t_lstate = 0; |
| 177 | } |
| 178 | splx(s); |
| 179 | } |
| 180 | |
| 181 | /* |
| 182 | * Send stop character on input overflow. |
| 183 | */ |
| 184 | ttyblock(tp) |
| 185 | register struct tty *tp; |
| 186 | { |
| 187 | register x; |
| 188 | x = tp->t_rawq.c_cc + tp->t_canq.c_cc; |
| 189 | if (tp->t_rawq.c_cc > TTYHOG) { |
| 190 | flushtty(tp, FREAD|FWRITE); |
| 191 | tp->t_state &= ~TS_TBLOCK; |
| 192 | } |
| 193 | if (x >= TTYHOG/2) { |
| 194 | if (putc(tun.t_stopc, &tp->t_outq)==0) { |
| 195 | tp->t_state |= TS_TBLOCK; |
| 196 | tp->t_char++; |
| 197 | ttstart(tp); |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | /* |
| 203 | * Restart typewriter output following a delay |
| 204 | * timeout. |
| 205 | * The name of the routine is passed to the timeout |
| 206 | * subroutine and it is called during a clock interrupt. |
| 207 | */ |
| 208 | ttrstrt(tp) |
| 209 | register struct tty *tp; |
| 210 | { |
| 211 | |
| 212 | if (tp == 0) { |
| 213 | printf("ttrstrt: arg was 0!\n"); |
| 214 | return; |
| 215 | } |
| 216 | tp->t_state &= ~TS_TIMEOUT; |
| 217 | ttstart(tp); |
| 218 | } |
| 219 | |
| 220 | /* |
| 221 | * Start output on the typewriter. It is used from the top half |
| 222 | * after some characters have been put on the output queue, |
| 223 | * from the interrupt routine to transmit the next |
| 224 | * character, and after a timeout has finished. |
| 225 | */ |
| 226 | ttstart(tp) |
| 227 | register struct tty *tp; |
| 228 | { |
| 229 | register s; |
| 230 | |
| 231 | s = spl5(); |
| 232 | if ((tp->t_state&(TS_TIMEOUT|TS_TTSTOP|TS_BUSY)) == 0 && |
| 233 | tp->t_oproc) /* kludge for pty */ |
| 234 | (*tp->t_oproc)(tp); |
| 235 | splx(s); |
| 236 | } |
| 237 | |
| 238 | /* |
| 239 | * Common code for tty ioctls. |
| 240 | */ |
| 241 | /*ARGSUSED*/ |
| 242 | ttioctl(tp, com, data, flag) |
| 243 | register struct tty *tp; |
| 244 | caddr_t data; |
| 245 | { |
| 246 | int dev = tp->t_dev; |
| 247 | extern int nldisp; |
| 248 | int s; |
| 249 | |
| 250 | /* |
| 251 | * If the ioctl involves modification, |
| 252 | * insist on being able to write the device, |
| 253 | * and hang if in the background. |
| 254 | */ |
| 255 | switch (com) { |
| 256 | |
| 257 | case TIOCSETD: |
| 258 | case TIOCSETP: |
| 259 | case TIOCSETN: |
| 260 | case TIOCFLUSH: |
| 261 | case TIOCSETC: |
| 262 | case TIOCSLTC: |
| 263 | case TIOCSPGRP: |
| 264 | case TIOCLBIS: |
| 265 | case TIOCLBIC: |
| 266 | case TIOCLSET: |
| 267 | while (tp->t_line == NTTYDISC && |
| 268 | u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && |
| 269 | (u.u_procp->p_flag&SVFORK) == 0 && |
| 270 | u.u_signal[SIGTTOU] != SIG_IGN && |
| 271 | u.u_signal[SIGTTOU] != SIG_HOLD) { |
| 272 | gsignal(u.u_procp->p_pgrp, SIGTTOU); |
| 273 | sleep((caddr_t)&lbolt, TTOPRI); |
| 274 | } |
| 275 | break; |
| 276 | } |
| 277 | |
| 278 | switch (com) { |
| 279 | |
| 280 | /* get discipline number */ |
| 281 | case TIOCGETD: |
| 282 | *(int *)data = tp->t_line; |
| 283 | break; |
| 284 | |
| 285 | /* set line discipline */ |
| 286 | case TIOCSETD: { |
| 287 | register int t = *(int *)data; |
| 288 | int error; |
| 289 | |
| 290 | if (t >= nldisp) |
| 291 | return (ENXIO); |
| 292 | s = spl5(); |
| 293 | if (tp->t_line) |
| 294 | (*linesw[tp->t_line].l_close)(tp); |
| 295 | if (t) |
| 296 | error = (*linesw[t].l_open)(dev, tp); |
| 297 | splx(s); |
| 298 | if (error) |
| 299 | return (error); |
| 300 | tp->t_line = t; |
| 301 | break; |
| 302 | } |
| 303 | |
| 304 | /* prevent more opens on channel */ |
| 305 | case TIOCEXCL: |
| 306 | tp->t_state |= TS_XCLUDE; |
| 307 | break; |
| 308 | |
| 309 | case TIOCNXCL: |
| 310 | tp->t_state &= ~TS_XCLUDE; |
| 311 | break; |
| 312 | |
| 313 | /* set new parameters */ |
| 314 | case TIOCSETP: |
| 315 | case TIOCSETN: { |
| 316 | register struct sgttyb *sg = (struct sgttyb *)data; |
| 317 | struct clist tq; |
| 318 | |
| 319 | (void) spl5(); |
| 320 | if (tp->t_flags&RAW || sg->sg_flags&RAW || com == TIOCSETP) |
| 321 | wflushtty(tp); |
| 322 | else if ((tp->t_flags&CBREAK) != (sg->sg_flags&CBREAK)) { |
| 323 | if (sg->sg_flags & CBREAK) { |
| 324 | catq(&tp->t_rawq, &tp->t_canq); |
| 325 | tq = tp->t_rawq; |
| 326 | tp->t_rawq = tp->t_canq; |
| 327 | tp->t_canq = tq; |
| 328 | } else { |
| 329 | tp->t_local |= LPENDIN; |
| 330 | ttwakeup(tp); |
| 331 | } |
| 332 | } |
| 333 | tp->t_ispeed = sg->sg_ispeed; |
| 334 | tp->t_ospeed = sg->sg_ospeed; |
| 335 | tp->t_erase = sg->sg_erase; |
| 336 | tp->t_kill = sg->sg_kill; |
| 337 | tp->t_flags = sg->sg_flags; |
| 338 | if (tp->t_flags & RAW) { |
| 339 | tp->t_state &= ~TS_TTSTOP; |
| 340 | ttstart(tp); |
| 341 | } |
| 342 | (void) spl0(); |
| 343 | break; |
| 344 | } |
| 345 | |
| 346 | /* send current parameters to user */ |
| 347 | case TIOCGETP: { |
| 348 | register struct sgttyb *sg = (struct sgttyb *)data; |
| 349 | |
| 350 | sg->sg_ispeed = tp->t_ispeed; |
| 351 | sg->sg_ospeed = tp->t_ospeed; |
| 352 | sg->sg_erase = tp->t_erase; |
| 353 | sg->sg_kill = tp->t_kill; |
| 354 | sg->sg_flags = tp->t_flags; |
| 355 | break; |
| 356 | } |
| 357 | |
| 358 | /* hang up line on last close */ |
| 359 | case TIOCHPCL: |
| 360 | tp->t_state |= TS_HUPCLS; |
| 361 | break; |
| 362 | |
| 363 | case TIOCFLUSH: { |
| 364 | register int flags = *(int *)data; |
| 365 | |
| 366 | if (flags == 0) |
| 367 | flags = FREAD|FWRITE; |
| 368 | else |
| 369 | flags &= FREAD|FWRITE; |
| 370 | flushtty(tp, flags); |
| 371 | break; |
| 372 | } |
| 373 | |
| 374 | case FIONBIO: |
| 375 | if (*(int *)data) |
| 376 | tp->t_state |= TS_NBIO; |
| 377 | else |
| 378 | tp->t_state &= ~TS_NBIO; |
| 379 | break; |
| 380 | |
| 381 | case FIOASYNC: |
| 382 | if (*(int *)data) |
| 383 | tp->t_state |= TS_ASYNC; |
| 384 | else |
| 385 | tp->t_state &= ~TS_ASYNC; |
| 386 | break; |
| 387 | |
| 388 | /* set and fetch special characters */ |
| 389 | case TIOCSETC: |
| 390 | bcopy(data, (caddr_t)&tun, sizeof (struct tchars)); |
| 391 | break; |
| 392 | |
| 393 | case TIOCGETC: |
| 394 | bcopy((caddr_t)&tun, data, sizeof (struct tchars)); |
| 395 | break; |
| 396 | |
| 397 | /* set/get local special characters */ |
| 398 | case TIOCSLTC: |
| 399 | bcopy(data, (caddr_t)&tlun, sizeof (struct ltchars)); |
| 400 | break; |
| 401 | |
| 402 | case TIOCGLTC: |
| 403 | bcopy((caddr_t)&tlun, data, sizeof (struct ltchars)); |
| 404 | break; |
| 405 | |
| 406 | /* return number of characters immediately available */ |
| 407 | case FIONREAD: |
| 408 | *(off_t *)data = ttnread(tp); |
| 409 | break; |
| 410 | |
| 411 | /* should allow SPGRP and GPGRP only if tty open for reading */ |
| 412 | case TIOCSPGRP: |
| 413 | tp->t_pgrp = *(int *)data; |
| 414 | break; |
| 415 | |
| 416 | case TIOCGPGRP: |
| 417 | *(int *)data = tp->t_pgrp; |
| 418 | break; |
| 419 | |
| 420 | /* Modify local mode word */ |
| 421 | case TIOCLBIS: |
| 422 | tp->t_local |= *(int *)data; |
| 423 | break; |
| 424 | |
| 425 | case TIOCLBIC: |
| 426 | tp->t_local &= ~(*(int *)data); |
| 427 | break; |
| 428 | |
| 429 | case TIOCLSET: |
| 430 | tp->t_local = *(int *)data; |
| 431 | break; |
| 432 | |
| 433 | case TIOCLGET: |
| 434 | *(int *)data = tp->t_local; |
| 435 | break; |
| 436 | |
| 437 | case TIOCSTOP: { |
| 438 | int s = spl5(); |
| 439 | |
| 440 | if ((tp->t_state & TS_TTSTOP) == 0) { |
| 441 | tp->t_state |= TS_TTSTOP; |
| 442 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); |
| 443 | } |
| 444 | splx(s); |
| 445 | break; |
| 446 | } |
| 447 | |
| 448 | case TIOCSTART: { |
| 449 | int s = spl5(); |
| 450 | |
| 451 | if ((tp->t_state & TS_TTSTOP) || (tp->t_local & LFLUSHO)) { |
| 452 | tp->t_state &= ~TS_TTSTOP; |
| 453 | tp->t_local &= ~LFLUSHO; |
| 454 | ttstart(tp); |
| 455 | } |
| 456 | splx(s); |
| 457 | break; |
| 458 | } |
| 459 | |
| 460 | default: |
| 461 | return (-1); |
| 462 | } |
| 463 | return (0); |
| 464 | } |
| 465 | |
| 466 | ttnread(tp) |
| 467 | struct tty *tp; |
| 468 | { |
| 469 | int nread = 0; |
| 470 | |
| 471 | if (tp->t_local & LPENDIN) |
| 472 | ttypend(tp); |
| 473 | nread = tp->t_canq.c_cc; |
| 474 | if (tp->t_flags & (RAW|CBREAK)) |
| 475 | nread += tp->t_rawq.c_cc; |
| 476 | return (nread); |
| 477 | } |
| 478 | |
| 479 | ttselect(dev, rw) |
| 480 | dev_t dev; |
| 481 | int rw; |
| 482 | { |
| 483 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; |
| 484 | int nread; |
| 485 | int s = spl5(); |
| 486 | |
| 487 | switch (rw) { |
| 488 | |
| 489 | case FREAD: |
| 490 | nread = ttnread(tp); |
| 491 | if (nread > 0) |
| 492 | goto win; |
| 493 | if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait) |
| 494 | tp->t_state |= TS_RCOLL; |
| 495 | else |
| 496 | tp->t_rsel = u.u_procp; |
| 497 | break; |
| 498 | |
| 499 | case FWRITE: |
| 500 | if (tp->t_outq.c_cc <= TTLOWAT(tp)) |
| 501 | goto win; |
| 502 | if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait) |
| 503 | tp->t_state |= TS_WCOLL; |
| 504 | else |
| 505 | tp->t_wsel = u.u_procp; |
| 506 | break; |
| 507 | } |
| 508 | splx(s); |
| 509 | return (0); |
| 510 | win: |
| 511 | splx(s); |
| 512 | return (1); |
| 513 | } |
| 514 | |
| 515 | #define OBUFSIZ 100 |
| 516 | |
| 517 | /* |
| 518 | * routine called on opens while tp->t_line == NTTYDISC |
| 519 | * establishes a process group for distribution of |
| 520 | * quits and interrupts from the tty. |
| 521 | * (actually, pp->p_pgrp can't be 0 when this routine |
| 522 | * is called since NTTYDISC is not the default discipline) |
| 523 | */ |
| 524 | ttyopen(dev, tp) |
| 525 | dev_t dev; |
| 526 | register struct tty *tp; |
| 527 | { |
| 528 | register struct proc *pp; |
| 529 | |
| 530 | pp = u.u_procp; |
| 531 | tp->t_dev = dev; |
| 532 | if (pp->p_pgrp == 0) { |
| 533 | u.u_ttyp = tp; |
| 534 | u.u_ttyd = dev; |
| 535 | if (tp->t_pgrp == 0) |
| 536 | tp->t_pgrp = pp->p_pid; |
| 537 | pp->p_pgrp = tp->t_pgrp; |
| 538 | } |
| 539 | tp->t_state &= ~TS_WOPEN; |
| 540 | tp->t_state |= TS_ISOPEN; |
| 541 | if (tp->t_line != NTTYDISC) |
| 542 | wflushtty(tp); |
| 543 | return (0); |
| 544 | } |
| 545 | |
| 546 | /* |
| 547 | * clean tp on last close |
| 548 | */ |
| 549 | ttyclose(tp) |
| 550 | register struct tty *tp; |
| 551 | { |
| 552 | |
| 553 | if (tp->t_line) { |
| 554 | wflushtty(tp); |
| 555 | tp->t_line = 0; |
| 556 | return; |
| 557 | } |
| 558 | tp->t_pgrp = 0; |
| 559 | wflushtty(tp); |
| 560 | tp->t_state = 0; |
| 561 | } |
| 562 | |
| 563 | /* |
| 564 | * reinput pending characters after state switch |
| 565 | * call at spl5(). |
| 566 | */ |
| 567 | ttypend(tp) |
| 568 | register struct tty *tp; |
| 569 | { |
| 570 | struct clist tq; |
| 571 | register c; |
| 572 | |
| 573 | tp->t_local &= ~LPENDIN; |
| 574 | tp->t_lstate |= LSTYPEN; |
| 575 | tq = tp->t_rawq; |
| 576 | tp->t_rawq.c_cc = 0; |
| 577 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; |
| 578 | while ((c = getc(&tq)) >= 0) |
| 579 | ttyinput(c, tp); |
| 580 | tp->t_lstate &= ~LSTYPEN; |
| 581 | } |
| 582 | |
| 583 | /* |
| 584 | * Place a character on raw TTY input queue, putting in delimiters |
| 585 | * and waking up top half as needed. |
| 586 | * Also echo if required. |
| 587 | * The arguments are the character and the appropriate |
| 588 | * tty structure. |
| 589 | */ |
| 590 | ttyinput(c, tp) |
| 591 | register c; |
| 592 | register struct tty *tp; |
| 593 | { |
| 594 | register int t_flags; |
| 595 | int i; |
| 596 | |
| 597 | if (tp->t_local&LPENDIN) |
| 598 | ttypend(tp); |
| 599 | tk_nin++; |
| 600 | c &= 0377; |
| 601 | t_flags = tp->t_flags; |
| 602 | if (t_flags&TANDEM) |
| 603 | ttyblock(tp); |
| 604 | if ((t_flags&RAW)==0) { |
| 605 | if ((tp->t_lstate&LSTYPEN) == 0) |
| 606 | c &= 0177; |
| 607 | /* check for literal nexting very first */ |
| 608 | if (tp->t_lstate&LSLNCH) { |
| 609 | c |= 0200; |
| 610 | tp->t_lstate &= ~LSLNCH; |
| 611 | } |
| 612 | if (tp->t_line == NTTYDISC && c==tlun.t_lnextc) { |
| 613 | if (tp->t_flags&ECHO) |
| 614 | ttyout("^\b", tp); |
| 615 | tp->t_lstate |= LSLNCH; |
| 616 | /* check for output control functions */ |
| 617 | } else if (c==tun.t_stopc) { |
| 618 | if ((tp->t_state&TS_TTSTOP)==0) { |
| 619 | tp->t_state |= TS_TTSTOP; |
| 620 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); |
| 621 | return; |
| 622 | } |
| 623 | if (c!=tun.t_startc) |
| 624 | return; |
| 625 | } else if (c==tun.t_startc) { |
| 626 | tp->t_state &= ~TS_TTSTOP; |
| 627 | tp->t_local &= ~LFLUSHO; |
| 628 | ttstart(tp); |
| 629 | return; |
| 630 | } else if (tp->t_line == NTTYDISC && c==tlun.t_flushc) { |
| 631 | if (tp->t_local & LFLUSHO) |
| 632 | tp->t_local &= ~LFLUSHO; |
| 633 | else { |
| 634 | flushtty(tp, FWRITE); |
| 635 | ttyecho(c, tp); |
| 636 | if (tp->t_rawq.c_cc+tp->t_canq.c_cc) |
| 637 | ttyretype(tp); |
| 638 | tp->t_local |= LFLUSHO; |
| 639 | } |
| 640 | ttstart(tp); |
| 641 | return; |
| 642 | } else if (c==tun.t_intrc || c==tun.t_quitc || |
| 643 | (tp->t_line == NTTYDISC && c==tlun.t_suspc)) { |
| 644 | if ((tp->t_local & LNOFLSH) == 0) |
| 645 | flushtty(tp, |
| 646 | c==tlun.t_suspc ? FREAD : FREAD|FWRITE); |
| 647 | ttyecho(c, tp); |
| 648 | c = c==tun.t_intrc ? SIGINT : |
| 649 | ((c==tun.t_quitc) ? SIGQUIT : SIGTSTP); |
| 650 | ttsignal(tp, c); |
| 651 | /* check for buffer editing functions - cooked mode */ |
| 652 | } else if ((t_flags&CBREAK) == 0) { |
| 653 | if ((tp->t_lstate&LSQUOT) && |
| 654 | (c==tp->t_erase||c==tp->t_kill)) { |
| 655 | ttyrub(unputc(&tp->t_rawq), tp); |
| 656 | c |= 0200; |
| 657 | } |
| 658 | if (c==tp->t_erase) { |
| 659 | if (tp->t_rawq.c_cc) |
| 660 | ttyrub(unputc(&tp->t_rawq), tp); |
| 661 | } else if (c==tp->t_kill) { |
| 662 | if (tp->t_local&LCRTKIL && |
| 663 | tp->t_rawq.c_cc == tp->t_rocount) { |
| 664 | while (tp->t_rawq.c_cc) |
| 665 | ttyrub(unputc(&tp->t_rawq), tp); |
| 666 | } else { |
| 667 | ttyecho(c, tp); |
| 668 | ttyecho('\n', tp); |
| 669 | while (getc(&tp->t_rawq) > 0) |
| 670 | ; |
| 671 | tp->t_rocount = 0; |
| 672 | } |
| 673 | tp->t_lstate = 0; |
| 674 | } else if (tp->t_line == NTTYDISC && c==tlun.t_werasc) { |
| 675 | if (tp->t_rawq.c_cc == 0) |
| 676 | goto out; |
| 677 | do { |
| 678 | c = unputc(&tp->t_rawq); |
| 679 | if (c != ' ' && c != '\t') |
| 680 | goto erasenb; |
| 681 | ttyrub(c, tp); |
| 682 | } while (tp->t_rawq.c_cc); |
| 683 | goto out; |
| 684 | erasenb: |
| 685 | do { |
| 686 | ttyrub(c, tp); |
| 687 | if (tp->t_rawq.c_cc == 0) |
| 688 | goto out; |
| 689 | c = unputc(&tp->t_rawq); |
| 690 | } while (c != ' ' && c != '\t'); |
| 691 | (void) putc(c, &tp->t_rawq); |
| 692 | } else if (tp->t_line == NTTYDISC && c==tlun.t_rprntc) { |
| 693 | ttyretype(tp); |
| 694 | /* check for cooked mode input buffer overflow */ |
| 695 | } else if (tp->t_rawq.c_cc+tp->t_canq.c_cc >= TTYHOG) { |
| 696 | ; |
| 697 | /* put data char in q for user and wakeup if a break char */ |
| 698 | } else if (putc(c, &tp->t_rawq) >= 0) { |
| 699 | if (tp->t_rawq.c_cc+tp->t_canq.c_cc==TTYHOG |
| 700 | && tp->t_line == NTTYDISC) |
| 701 | (void) ttyoutput(CTRL(g), tp); |
| 702 | if (!ttbreakc(c, tp)) { |
| 703 | if (tp->t_rocount++ == 0) |
| 704 | tp->t_rocol = tp->t_col; |
| 705 | } else { |
| 706 | tp->t_rocount = 0; |
| 707 | catq(&tp->t_rawq, &tp->t_canq); |
| 708 | /* IF (TP->T_CHAN) (VOID) SDATA(TP->T_CHAN); */ |
| 709 | ttwakeup(tp); |
| 710 | } |
| 711 | tp->t_lstate &= ~LSQUOT; |
| 712 | if (c == '\\') |
| 713 | tp->t_lstate |= LSQUOT; |
| 714 | if (tp->t_lstate&LSERASE) { |
| 715 | tp->t_lstate &= ~LSERASE; |
| 716 | (void) ttyoutput('/', tp); |
| 717 | } |
| 718 | i = tp->t_col; |
| 719 | ttyecho(c, tp); |
| 720 | if (c==tun.t_eofc && tp->t_flags&ECHO) { |
| 721 | i = MIN(2, tp->t_col - i); |
| 722 | while (i > 0) { |
| 723 | (void) ttyoutput('\b', tp); |
| 724 | i--; |
| 725 | } |
| 726 | } |
| 727 | } |
| 728 | /* CBREAK mode */ |
| 729 | } else if (tp->t_rawq.c_cc > TTYHOG) { |
| 730 | if (tp->t_outq.c_cc < TTHIWAT(tp) && |
| 731 | tp->t_line == NTTYDISC) |
| 732 | (void) ttyoutput(CTRL(g), tp); |
| 733 | } else if (putc(c, &tp->t_rawq) >= 0) { |
| 734 | ttwakeup(tp); |
| 735 | ttyecho(c, tp); |
| 736 | } |
| 737 | /* RAW mode */ |
| 738 | } else if (tp->t_rawq.c_cc > TTYHOG) |
| 739 | flushtty(tp, FREAD|FWRITE); |
| 740 | else { |
| 741 | if (putc(c, &tp->t_rawq) >= 0) |
| 742 | ttwakeup(tp); |
| 743 | ttyecho(c, tp); |
| 744 | } |
| 745 | out: |
| 746 | if (tp->t_local & LDECCTQ && tp->t_state & TS_TTSTOP && |
| 747 | tun.t_startc != tun.t_stopc) |
| 748 | return; |
| 749 | tp->t_state &= ~TS_TTSTOP; |
| 750 | tp->t_local &= ~LFLUSHO; |
| 751 | ttstart(tp); |
| 752 | } |
| 753 | |
| 754 | /* |
| 755 | * put character on TTY output queue, adding delays, |
| 756 | * expanding tabs, and handling the CR/NL bit. |
| 757 | * It is called both from the top half for output, and from |
| 758 | * interrupt level for echoing. |
| 759 | * The arguments are the character and the tty structure. |
| 760 | * Returns < 0 if putc succeeds, otherwise returns char to resend |
| 761 | * Must be recursive. |
| 762 | */ |
| 763 | ttyoutput(c, tp) |
| 764 | register c; |
| 765 | register struct tty *tp; |
| 766 | { |
| 767 | register char *colp; |
| 768 | register ctype; |
| 769 | |
| 770 | if (tp->t_flags&RAW || tp->t_local&LLITOUT) { |
| 771 | if (tp->t_local&LFLUSHO) |
| 772 | return (-1); |
| 773 | if (putc(c, &tp->t_outq)) |
| 774 | return (c); |
| 775 | tk_nout++; |
| 776 | return (-1); |
| 777 | } |
| 778 | /* |
| 779 | * Ignore EOT in normal mode to avoid hanging up |
| 780 | * certain terminals. |
| 781 | */ |
| 782 | c &= 0177; |
| 783 | if (c==CEOT && (tp->t_flags&CBREAK)==0) |
| 784 | return (-1); |
| 785 | /* |
| 786 | * Turn tabs to spaces as required |
| 787 | */ |
| 788 | if (c=='\t' && (tp->t_flags&TBDELAY)==XTABS) { |
| 789 | register int s; |
| 790 | |
| 791 | c = 8 - (tp->t_col&7); |
| 792 | if ((tp->t_local&LFLUSHO) == 0) { |
| 793 | s = spl5(); /* don't interrupt tabs */ |
| 794 | c -= b_to_q(" ", c, &tp->t_outq); |
| 795 | tk_nout += c; |
| 796 | splx(s); |
| 797 | } |
| 798 | tp->t_col += c; |
| 799 | return (c ? -1 : '\t'); |
| 800 | } |
| 801 | tk_nout++; |
| 802 | /* |
| 803 | * for upper-case-only terminals, |
| 804 | * generate escapes. |
| 805 | */ |
| 806 | if (tp->t_flags&LCASE) { |
| 807 | colp = "({)}!|^~'`"; |
| 808 | while (*colp++) |
| 809 | if (c == *colp++) { |
| 810 | if (ttyoutput('\\', tp) >= 0) |
| 811 | return (c); |
| 812 | c = colp[-2]; |
| 813 | break; |
| 814 | } |
| 815 | if ('A'<=c && c<='Z') { |
| 816 | if (ttyoutput('\\', tp) >= 0) |
| 817 | return (c); |
| 818 | } else if ('a'<=c && c<='z') |
| 819 | c += 'A' - 'a'; |
| 820 | } |
| 821 | /* |
| 822 | * turn <nl> to <cr><lf> if desired. |
| 823 | */ |
| 824 | if (c=='\n' && tp->t_flags&CRMOD) |
| 825 | if (ttyoutput('\r', tp) >= 0) |
| 826 | return (c); |
| 827 | if (c=='~' && tp->t_local<ILDE) |
| 828 | c = '`'; |
| 829 | if ((tp->t_local&LFLUSHO) == 0 && putc(c, &tp->t_outq)) |
| 830 | return (c); |
| 831 | /* |
| 832 | * Calculate delays. |
| 833 | * The numbers here represent clock ticks |
| 834 | * and are not necessarily optimal for all terminals. |
| 835 | * The delays are indicated by characters above 0200. |
| 836 | * In raw mode there are no delays and the |
| 837 | * transmission path is 8 bits wide. |
| 838 | */ |
| 839 | colp = &tp->t_col; |
| 840 | ctype = partab[c]; |
| 841 | c = 0; |
| 842 | switch (ctype&077) { |
| 843 | |
| 844 | case ORDINARY: |
| 845 | (*colp)++; |
| 846 | |
| 847 | case CONTROL: |
| 848 | break; |
| 849 | |
| 850 | case BACKSPACE: |
| 851 | if (*colp) |
| 852 | (*colp)--; |
| 853 | break; |
| 854 | |
| 855 | case NEWLINE: |
| 856 | ctype = (tp->t_flags >> 8) & 03; |
| 857 | if (ctype == 1) { /* tty 37 */ |
| 858 | if (*colp) |
| 859 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); |
| 860 | } else |
| 861 | if (ctype == 2) { /* vt05 */ |
| 862 | c = 6; |
| 863 | } |
| 864 | *colp = 0; |
| 865 | break; |
| 866 | |
| 867 | case TAB: |
| 868 | ctype = (tp->t_flags >> 10) & 03; |
| 869 | if (ctype == 1) { /* tty 37 */ |
| 870 | c = 1 - (*colp | ~07); |
| 871 | if (c < 5) |
| 872 | c = 0; |
| 873 | } |
| 874 | *colp |= 07; |
| 875 | (*colp)++; |
| 876 | break; |
| 877 | |
| 878 | case VTAB: |
| 879 | if (tp->t_flags & VTDELAY) /* tty 37 */ |
| 880 | c = 0177; |
| 881 | break; |
| 882 | |
| 883 | case RETURN: |
| 884 | ctype = (tp->t_flags >> 12) & 03; |
| 885 | if (ctype == 1) { /* tn 300 */ |
| 886 | c = 5; |
| 887 | } else if (ctype == 2) { /* ti 700 */ |
| 888 | c = 10; |
| 889 | } else if (ctype == 3) { /* concept 100 */ |
| 890 | int i; |
| 891 | if ((i = *colp) >= 0) |
| 892 | for (; i<9; i++) |
| 893 | (void) putc(0177, &tp->t_outq); |
| 894 | } |
| 895 | *colp = 0; |
| 896 | } |
| 897 | if (c && (tp->t_local&LFLUSHO) == 0) |
| 898 | (void) putc(c|0200, &tp->t_outq); |
| 899 | return (-1); |
| 900 | } |
| 901 | |
| 902 | /* |
| 903 | * Called from device's read routine after it has |
| 904 | * calculated the tty-structure given as argument. |
| 905 | */ |
| 906 | ttread(tp, uio) |
| 907 | register struct tty *tp; |
| 908 | struct uio *uio; |
| 909 | { |
| 910 | register struct clist *qp; |
| 911 | register c, first; |
| 912 | int error = 0; |
| 913 | |
| 914 | if ((tp->t_state&TS_CARR_ON)==0) |
| 915 | return (EIO); |
| 916 | loop: |
| 917 | (void) spl5(); |
| 918 | if (tp->t_local&LPENDIN) |
| 919 | ttypend(tp); |
| 920 | (void) spl0(); |
| 921 | while (tp == u.u_ttyp && u.u_procp->p_pgrp != tp->t_pgrp) { |
| 922 | if (u.u_signal[SIGTTIN] == SIG_IGN || |
| 923 | u.u_signal[SIGTTIN] == SIG_HOLD || |
| 924 | /* |
| 925 | (u.u_procp->p_flag&SDETACH) || |
| 926 | */ |
| 927 | u.u_procp->p_flag&SVFORK) |
| 928 | return (EIO); |
| 929 | gsignal(u.u_procp->p_pgrp, SIGTTIN); |
| 930 | sleep((caddr_t)&lbolt, TTIPRI); |
| 931 | } |
| 932 | if (tp->t_flags&RAW) { |
| 933 | (void) spl5(); |
| 934 | if (tp->t_rawq.c_cc <= 0) { |
| 935 | if ((tp->t_state&TS_CARR_ON)==0 || |
| 936 | (tp->t_state&TS_NBIO)) { |
| 937 | (void) spl0(); |
| 938 | return (EWOULDBLOCK); |
| 939 | } |
| 940 | sleep((caddr_t)&tp->t_rawq, TTIPRI); |
| 941 | (void) spl0(); |
| 942 | goto loop; |
| 943 | } |
| 944 | (void) spl0(); |
| 945 | while (tp->t_rawq.c_cc && uio->uio_iovcnt) { |
| 946 | error = passuc(getc(&tp->t_rawq), uio); |
| 947 | if (error) |
| 948 | break; |
| 949 | } |
| 950 | return (error); |
| 951 | } else { |
| 952 | qp = tp->t_flags & CBREAK ? &tp->t_rawq : &tp->t_canq; |
| 953 | (void) spl5(); |
| 954 | if (qp->c_cc <= 0) { |
| 955 | if ((tp->t_state&TS_CARR_ON)==0 || |
| 956 | (tp->t_state&TS_NBIO)) { |
| 957 | (void) spl0(); |
| 958 | return (EWOULDBLOCK); |
| 959 | } |
| 960 | sleep((caddr_t)&tp->t_rawq, TTIPRI); |
| 961 | (void) spl0(); |
| 962 | goto loop; |
| 963 | } |
| 964 | (void) spl0(); |
| 965 | first = 1; |
| 966 | while ((c = getc(qp)) >= 0) { |
| 967 | if (tp->t_flags&CRMOD && c == '\r') |
| 968 | c = '\n'; |
| 969 | if (tp->t_flags&LCASE && c <= 0177) |
| 970 | if (tp->t_lstate&LSBKSL) { |
| 971 | if (maptab[c]) |
| 972 | c = maptab[c]; |
| 973 | tp->t_lstate &= ~LSBKSL; |
| 974 | } else if (c >= 'A' && c <= 'Z') |
| 975 | c += 'a' - 'A'; |
| 976 | else if (c == '\\') { |
| 977 | tp->t_lstate |= LSBKSL; |
| 978 | continue; |
| 979 | } |
| 980 | if (tp->t_line == NTTYDISC && c == tlun.t_dsuspc) { |
| 981 | ttsignal(tp, SIGTSTP); |
| 982 | if (first) { |
| 983 | sleep((caddr_t)&lbolt, TTIPRI); |
| 984 | goto loop; |
| 985 | } |
| 986 | break; |
| 987 | } |
| 988 | if (c == tun.t_eofc && (tp->t_flags&CBREAK)==0) |
| 989 | break; |
| 990 | error = passuc(c & 0177, uio); |
| 991 | if (error) |
| 992 | break; |
| 993 | if (uio->uio_iovcnt == 0) |
| 994 | break; |
| 995 | if ((tp->t_flags&CBREAK)==0 && ttbreakc(c, tp)) |
| 996 | break; |
| 997 | first = 0; |
| 998 | } |
| 999 | tp->t_lstate &= ~LSBKSL; |
| 1000 | } |
| 1001 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { |
| 1002 | if (putc(tun.t_startc, &tp->t_outq)==0) { |
| 1003 | tp->t_state &= ~TS_TBLOCK; |
| 1004 | ttstart(tp); |
| 1005 | } |
| 1006 | tp->t_char = 0; |
| 1007 | } |
| 1008 | return (error); |
| 1009 | } |
| 1010 | |
| 1011 | /* |
| 1012 | * Called from the device's write routine after it has |
| 1013 | * calculated the tty-structure given as argument. |
| 1014 | */ |
| 1015 | ttwrite(tp, uio) |
| 1016 | register struct tty *tp; |
| 1017 | struct uio *uio; |
| 1018 | { |
| 1019 | #ifdef vax |
| 1020 | /* |
| 1021 | * THE POSITIONING OF CP, CC, AND CE ARE CRITICAL |
| 1022 | * AND MUST NOT BE CHANGED WITHOUT PATCHING |
| 1023 | * THE 'ASM' INLINES BELOW. WATCH OUT. |
| 1024 | */ |
| 1025 | #endif |
| 1026 | register char *cp; |
| 1027 | register int cc, ce; |
| 1028 | register i; |
| 1029 | char obuf[OBUFSIZ]; |
| 1030 | register c; |
| 1031 | int hiwat = TTHIWAT(tp); |
| 1032 | int cnt = uio->uio_resid; |
| 1033 | int error = 0; |
| 1034 | |
| 1035 | if ((tp->t_state&TS_CARR_ON)==0) |
| 1036 | return (EIO); |
| 1037 | loop: |
| 1038 | while (u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && |
| 1039 | (tp->t_local<OSTOP) && (u.u_procp->p_flag&SVFORK)==0 && |
| 1040 | u.u_signal[SIGTTOU] != SIG_IGN && |
| 1041 | u.u_signal[SIGTTOU] != SIG_HOLD |
| 1042 | /* |
| 1043 | && |
| 1044 | (u.u_procp->p_flag&SDETACH)==0) { |
| 1045 | */ |
| 1046 | ) { |
| 1047 | gsignal(u.u_procp->p_pgrp, SIGTTOU); |
| 1048 | sleep((caddr_t)&lbolt, TTIPRI); |
| 1049 | } |
| 1050 | while (uio->uio_resid > 0) { |
| 1051 | cc = uio->uio_iov->iov_len; |
| 1052 | if (cc == 0) { |
| 1053 | uio->uio_iovcnt--; |
| 1054 | uio->uio_iov++; |
| 1055 | if (uio->uio_iovcnt < 0) |
| 1056 | panic("ttwrite"); |
| 1057 | continue; |
| 1058 | } |
| 1059 | if (cc > OBUFSIZ) |
| 1060 | cc = OBUFSIZ; |
| 1061 | cp = obuf; |
| 1062 | error = uiomove(cp, cc, UIO_WRITE, uio); |
| 1063 | if (error) |
| 1064 | break; |
| 1065 | if (tp->t_outq.c_cc > hiwat) |
| 1066 | goto ovhiwat; |
| 1067 | if (tp->t_local&LFLUSHO) |
| 1068 | continue; |
| 1069 | if (tp->t_flags&LCASE || tp->t_local<ILDE) { |
| 1070 | while (cc) { |
| 1071 | c = *cp++; |
| 1072 | tp->t_rocount = 0; |
| 1073 | while ((c = ttyoutput(c, tp)) >= 0) { |
| 1074 | /* out of clists, wait a bit */ |
| 1075 | ttstart(tp); |
| 1076 | sleep((caddr_t)&lbolt, TTOPRI); |
| 1077 | tp->t_rocount = 0; |
| 1078 | } |
| 1079 | --cc; |
| 1080 | if (tp->t_outq.c_cc > hiwat) |
| 1081 | goto ovhiwat; |
| 1082 | } |
| 1083 | continue; |
| 1084 | } |
| 1085 | while (cc) { |
| 1086 | if (tp->t_flags&RAW || tp->t_local&LLITOUT) |
| 1087 | ce = cc; |
| 1088 | else { |
| 1089 | #ifdef vax |
| 1090 | asm(" scanc r9,(r10),_partab,$077"); |
| 1091 | asm(" subl3 r0,r9,r8"); |
| 1092 | #else |
| 1093 | ce=0; |
| 1094 | while (((partab[*(unsigned char *)(cp+ce)]&077)==0)&&(ce<cc)) |
| 1095 | ce++; |
| 1096 | #endif |
| 1097 | if (ce==0) { |
| 1098 | tp->t_rocount = 0; |
| 1099 | if (ttyoutput(*cp, tp) >= 0) { |
| 1100 | ttstart(tp); |
| 1101 | sleep((caddr_t)&lbolt, TTOPRI); |
| 1102 | continue; |
| 1103 | } |
| 1104 | cp++; |
| 1105 | cc--; |
| 1106 | if (tp->t_outq.c_cc > hiwat) |
| 1107 | goto ovhiwat; |
| 1108 | } |
| 1109 | } |
| 1110 | tp->t_rocount = 0; |
| 1111 | i=b_to_q(cp,ce,&tp->t_outq); |
| 1112 | ce-=i; |
| 1113 | tk_nout+=ce; |
| 1114 | tp->t_col+=ce; |
| 1115 | cp+=ce; |
| 1116 | cc-=ce; |
| 1117 | if (i) { |
| 1118 | ttstart(tp); |
| 1119 | sleep((caddr_t)&lbolt, TTOPRI); |
| 1120 | } |
| 1121 | if (ce || tp->t_outq.c_cc > hiwat) |
| 1122 | goto ovhiwat; |
| 1123 | } |
| 1124 | } |
| 1125 | ttstart(tp); |
| 1126 | return (error); |
| 1127 | |
| 1128 | ovhiwat: |
| 1129 | (void) spl5(); |
| 1130 | uio->uio_iov->iov_base -= cc; |
| 1131 | uio->uio_iov->iov_len += cc; |
| 1132 | uio->uio_resid += cc; |
| 1133 | uio->uio_offset -= cc; |
| 1134 | if (tp->t_outq.c_cc <= hiwat) { |
| 1135 | (void) spl0(); |
| 1136 | goto loop; |
| 1137 | } |
| 1138 | ttstart(tp); |
| 1139 | if (tp->t_state & TS_NBIO) { |
| 1140 | if (uio->uio_resid == cnt) |
| 1141 | return (EWOULDBLOCK); |
| 1142 | return (0); |
| 1143 | } |
| 1144 | tp->t_state |= TS_ASLEEP; |
| 1145 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
| 1146 | (void) spl0(); |
| 1147 | goto loop; |
| 1148 | } |
| 1149 | |
| 1150 | /* |
| 1151 | * Rubout one character from the rawq of tp |
| 1152 | * as cleanly as possible. |
| 1153 | */ |
| 1154 | ttyrub(c, tp) |
| 1155 | register c; |
| 1156 | register struct tty *tp; |
| 1157 | { |
| 1158 | register char *cp; |
| 1159 | register int savecol; |
| 1160 | int s; |
| 1161 | char *nextc(); |
| 1162 | |
| 1163 | if ((tp->t_flags&ECHO)==0) |
| 1164 | return; |
| 1165 | tp->t_local &= ~LFLUSHO; |
| 1166 | c &= 0377; |
| 1167 | if (tp->t_local&LCRTBS) { |
| 1168 | if (tp->t_rocount == 0) { |
| 1169 | /* |
| 1170 | * Screwed by ttwrite; retype |
| 1171 | */ |
| 1172 | ttyretype(tp); |
| 1173 | return; |
| 1174 | } |
| 1175 | if (c==('\t'|0200) || c==('\n'|0200)) |
| 1176 | ttyrubo(tp, 2); |
| 1177 | else switch (partab[c&=0177] & 0177) { |
| 1178 | |
| 1179 | case ORDINARY: |
| 1180 | if (tp->t_flags&LCASE && c >= 'A' && c <= 'Z') |
| 1181 | ttyrubo(tp, 2); |
| 1182 | else |
| 1183 | ttyrubo(tp, 1); |
| 1184 | break; |
| 1185 | |
| 1186 | case VTAB: |
| 1187 | case BACKSPACE: |
| 1188 | case CONTROL: |
| 1189 | case RETURN: |
| 1190 | if (tp->t_local & LCTLECH) |
| 1191 | ttyrubo(tp, 2); |
| 1192 | break; |
| 1193 | |
| 1194 | case TAB: |
| 1195 | if (tp->t_rocount < tp->t_rawq.c_cc) { |
| 1196 | ttyretype(tp); |
| 1197 | return; |
| 1198 | } |
| 1199 | s = spl5(); |
| 1200 | savecol = tp->t_col; |
| 1201 | tp->t_lstate |= LSCNTTB; |
| 1202 | tp->t_local |= LFLUSHO; |
| 1203 | tp->t_col = tp->t_rocol; |
| 1204 | for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) |
| 1205 | ttyecho(*cp, tp); |
| 1206 | tp->t_local &= ~LFLUSHO; |
| 1207 | tp->t_lstate &= ~LSCNTTB; |
| 1208 | splx(s); |
| 1209 | /* |
| 1210 | * savecol will now be length of the tab |
| 1211 | */ |
| 1212 | savecol -= tp->t_col; |
| 1213 | tp->t_col += savecol; |
| 1214 | if (savecol > 8) |
| 1215 | savecol = 8; /* overflow screw */ |
| 1216 | while (--savecol >= 0) |
| 1217 | (void) ttyoutput('\b', tp); |
| 1218 | break; |
| 1219 | |
| 1220 | default: |
| 1221 | panic("ttyrub"); |
| 1222 | } |
| 1223 | } else if (tp->t_local&LPRTERA) { |
| 1224 | if ((tp->t_lstate&LSERASE) == 0) { |
| 1225 | (void) ttyoutput('\\', tp); |
| 1226 | tp->t_lstate |= LSERASE; |
| 1227 | } |
| 1228 | ttyecho(c, tp); |
| 1229 | } else |
| 1230 | ttyecho(tp->t_erase, tp); |
| 1231 | tp->t_rocount--; |
| 1232 | } |
| 1233 | |
| 1234 | /* |
| 1235 | * Crt back over cnt chars perhaps |
| 1236 | * erasing them. |
| 1237 | */ |
| 1238 | ttyrubo(tp, cnt) |
| 1239 | register struct tty *tp; |
| 1240 | int cnt; |
| 1241 | { |
| 1242 | |
| 1243 | while (--cnt >= 0) |
| 1244 | ttyout(tp->t_local&LCRTERA ? "\b \b" : "\b", tp); |
| 1245 | } |
| 1246 | |
| 1247 | /* |
| 1248 | * Reprint the rawq line. |
| 1249 | * We assume c_cc has already been checked. |
| 1250 | */ |
| 1251 | ttyretype(tp) |
| 1252 | register struct tty *tp; |
| 1253 | { |
| 1254 | register char *cp; |
| 1255 | char *nextc(); |
| 1256 | int s; |
| 1257 | |
| 1258 | if (tlun.t_rprntc != 0377) |
| 1259 | ttyecho(tlun.t_rprntc, tp); |
| 1260 | (void) ttyoutput('\n', tp); |
| 1261 | s = spl5(); |
| 1262 | for (cp = tp->t_canq.c_cf; cp; cp = nextc(&tp->t_canq, cp)) |
| 1263 | ttyecho(*cp, tp); |
| 1264 | for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) |
| 1265 | ttyecho(*cp, tp); |
| 1266 | tp->t_lstate &= ~LSERASE; |
| 1267 | splx(s); |
| 1268 | tp->t_rocount = tp->t_rawq.c_cc; |
| 1269 | tp->t_rocol = 0; |
| 1270 | } |
| 1271 | |
| 1272 | /* |
| 1273 | * Echo a typed character to the terminal |
| 1274 | */ |
| 1275 | ttyecho(c, tp) |
| 1276 | register c; |
| 1277 | register struct tty *tp; |
| 1278 | { |
| 1279 | |
| 1280 | if ((tp->t_lstate & LSCNTTB) == 0) |
| 1281 | tp->t_local &= ~LFLUSHO; |
| 1282 | if ((tp->t_flags&ECHO) == 0) |
| 1283 | return; |
| 1284 | c &= 0377; |
| 1285 | if (tp->t_flags&RAW) { |
| 1286 | (void) ttyoutput(c, tp); |
| 1287 | return; |
| 1288 | } |
| 1289 | if (c == '\r' && tp->t_flags&CRMOD) |
| 1290 | c = '\n'; |
| 1291 | if (tp->t_local&LCTLECH) { |
| 1292 | if ((c&0177) <= 037 && c!='\t' && c!='\n' || (c&0177)==0177) { |
| 1293 | (void) ttyoutput('^', tp); |
| 1294 | c &= 0177; |
| 1295 | if (c == 0177) |
| 1296 | c = '?'; |
| 1297 | else if (tp->t_flags&LCASE) |
| 1298 | c += 'a' - 1; |
| 1299 | else |
| 1300 | c += 'A' - 1; |
| 1301 | } |
| 1302 | } |
| 1303 | if ((tp->t_flags&LCASE) && (c >= 'A' && c <= 'Z')) |
| 1304 | c += 'a' - 'A'; |
| 1305 | (void) ttyoutput(c & 0177, tp); |
| 1306 | } |
| 1307 | |
| 1308 | /* |
| 1309 | * Is c a break char for tp? |
| 1310 | */ |
| 1311 | ttbreakc(c, tp) |
| 1312 | register c; |
| 1313 | register struct tty *tp; |
| 1314 | { |
| 1315 | return (c == '\n' || c == tun.t_eofc || c == tun.t_brkc || |
| 1316 | c == '\r' && (tp->t_flags&CRMOD)); |
| 1317 | } |
| 1318 | |
| 1319 | /* |
| 1320 | * send string cp to tp |
| 1321 | */ |
| 1322 | ttyout(cp, tp) |
| 1323 | register char *cp; |
| 1324 | register struct tty *tp; |
| 1325 | { |
| 1326 | register char c; |
| 1327 | |
| 1328 | while (c = *cp++) |
| 1329 | (void) ttyoutput(c, tp); |
| 1330 | } |
| 1331 | |
| 1332 | ttwakeup(tp) |
| 1333 | struct tty *tp; |
| 1334 | { |
| 1335 | |
| 1336 | if (tp->t_rsel) { |
| 1337 | selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL); |
| 1338 | tp->t_state &= ~TS_RCOLL; |
| 1339 | tp->t_rsel = 0; |
| 1340 | } |
| 1341 | wakeup((caddr_t)&tp->t_rawq); |
| 1342 | } |
| 1343 | |
| 1344 | ttsignal(tp, signo) |
| 1345 | struct tty *tp; |
| 1346 | int signo; |
| 1347 | { |
| 1348 | |
| 1349 | gsignal(tp->t_pgrp, signo); |
| 1350 | } |