Commit | Line | Data |
---|---|---|
c392cc63 | 1 | /* tty.c 3.10 %G% */ |
89dc6dfb BJ |
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" | |
d1778415 | 18 | #include "../h/dk.h" |
89dc6dfb BJ |
19 | |
20 | char partab[]; | |
21 | ||
d3ebf5ee BJ |
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 | |
89dc6dfb BJ |
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; | |
6fdc0335 BJ |
87 | if (tp->t_pgrp == 0) |
88 | tp->t_pgrp = pp->p_pid; | |
89dc6dfb BJ |
89 | pp->p_pgrp = tp->t_pgrp; |
90 | } | |
91 | tp->t_state &= ~WOPEN; | |
92 | tp->t_state |= ISOPEN; | |
c392cc63 BJ |
93 | if (tp->t_line != OKILDISC) |
94 | tp->t_line = 0; /* conservative */ | |
89dc6dfb BJ |
95 | } |
96 | ||
89dc6dfb BJ |
97 | /* |
98 | * set default control characters. | |
99 | */ | |
100 | ttychars(tp) | |
101 | register struct tty *tp; | |
102 | { | |
8062c8a7 | 103 | |
89dc6dfb BJ |
104 | tun.t_intrc = CINTR; |
105 | tun.t_quitc = CQUIT; | |
106 | tun.t_startc = CSTART; | |
107 | tun.t_stopc = CSTOP; | |
108 | tun.t_eofc = CEOT; | |
109 | tun.t_brkc = CBRK; | |
110 | tp->t_erase = CERASE; | |
111 | tp->t_kill = CKILL; | |
8062c8a7 | 112 | /* begin local */ |
6fdc0335 BJ |
113 | tlun.t_suspc = CTRL(z); |
114 | tlun.t_dsuspc = CTRL(y); | |
8062c8a7 BJ |
115 | tlun.t_rprntc = CTRL(r); |
116 | tlun.t_flushc = CTRL(o); | |
117 | tlun.t_werasc = CTRL(w); | |
118 | tlun.t_lnextc = CTRL(v); | |
119 | tlun.t_lintr = CTRL(c); | |
120 | tlun.t_lerase = CTRL(h); | |
121 | tlun.t_lkill = CTRL(u); | |
122 | tp->t_local = 0; | |
123 | tp->t_lstate = 0; | |
124 | /* end local */ | |
89dc6dfb BJ |
125 | } |
126 | ||
127 | /* | |
128 | * clean tp on last close | |
129 | */ | |
130 | ttyclose(tp) | |
131 | register struct tty *tp; | |
132 | { | |
133 | ||
134 | tp->t_pgrp = 0; | |
135 | wflushtty(tp); | |
136 | tp->t_state = 0; | |
c392cc63 BJ |
137 | if (tp->t_line != OKILDISC) |
138 | tp->t_line = 0; | |
89dc6dfb BJ |
139 | } |
140 | ||
141 | /* | |
142 | * stty/gtty writearound | |
143 | */ | |
144 | stty() | |
145 | { | |
146 | u.u_arg[2] = u.u_arg[1]; | |
147 | u.u_arg[1] = TIOCSETP; | |
148 | ioctl(); | |
149 | } | |
150 | ||
151 | gtty() | |
152 | { | |
153 | u.u_arg[2] = u.u_arg[1]; | |
154 | u.u_arg[1] = TIOCGETP; | |
155 | ioctl(); | |
156 | } | |
157 | ||
101ba270 BJ |
158 | /* |
159 | * Do nothing specific version of line | |
160 | * discipline specific ioctl command. | |
161 | */ | |
de857265 | 162 | /*ARGSUSED*/ |
101ba270 BJ |
163 | nullioctl(tp, cmd, addr) |
164 | register struct tty *tp; | |
165 | caddr_t addr; | |
166 | { | |
167 | ||
168 | return (cmd); | |
169 | } | |
170 | ||
89dc6dfb BJ |
171 | /* |
172 | * ioctl system call | |
173 | * Check legality, execute common code, and switch out to individual | |
174 | * device routine. | |
175 | */ | |
176 | ioctl() | |
177 | { | |
178 | register struct file *fp; | |
179 | register struct inode *ip; | |
180 | register struct a { | |
181 | int fdes; | |
182 | int cmd; | |
183 | caddr_t cmarg; | |
184 | } *uap; | |
185 | register dev_t dev; | |
186 | register fmt; | |
187 | ||
188 | uap = (struct a *)u.u_ap; | |
189 | if ((fp = getf(uap->fdes)) == NULL) | |
190 | return; | |
191 | if (uap->cmd==FIOCLEX) { | |
192 | u.u_pofile[uap->fdes] |= EXCLOSE; | |
193 | return; | |
194 | } | |
195 | if (uap->cmd==FIONCLEX) { | |
196 | u.u_pofile[uap->fdes] &= ~EXCLOSE; | |
197 | return; | |
198 | } | |
199 | ip = fp->f_inode; | |
200 | fmt = ip->i_mode & IFMT; | |
201 | if (fmt != IFCHR && fmt != IFMPC) { | |
8062c8a7 BJ |
202 | /* begin local */ |
203 | if (uap->cmd==FIONREAD && (fmt == IFREG || fmt == IFDIR)) { | |
204 | off_t nread = ip->i_size - fp->f_un.f_offset; | |
205 | ||
206 | if (copyout((caddr_t)&nread, uap->cmarg, sizeof(off_t))) | |
207 | u.u_error = EFAULT; | |
208 | } else | |
209 | /* end local */ | |
210 | u.u_error = ENOTTY; | |
89dc6dfb BJ |
211 | return; |
212 | } | |
213 | dev = ip->i_un.i_rdev; | |
214 | u.u_r.r_val1 = 0; | |
215 | (*cdevsw[major(dev)].d_ioctl)(dev, uap->cmd, uap->cmarg, fp->f_flag); | |
216 | } | |
217 | ||
218 | /* | |
219 | * Common code for several tty ioctl commands | |
220 | */ | |
221 | ttioccomm(com, tp, addr, dev) | |
222 | register struct tty *tp; | |
223 | caddr_t addr; | |
224 | { | |
225 | unsigned t; | |
8062c8a7 | 226 | struct sgttyb iocb; |
de857265 | 227 | struct clist tq; |
89dc6dfb BJ |
228 | extern int nldisp; |
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 | } | |
8062c8a7 | 253 | (void) spl5(); |
89dc6dfb BJ |
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; | |
8062c8a7 | 260 | (void) spl0(); |
89dc6dfb BJ |
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: | |
de857265 | 278 | case TIOCSETN: |
89dc6dfb BJ |
279 | if (copyin(addr, (caddr_t)&iocb, sizeof(iocb))) { |
280 | u.u_error = EFAULT; | |
281 | return(1); | |
282 | } | |
101ba270 | 283 | (void) spl5(); |
8062c8a7 BJ |
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 | } | |
89dc6dfb | 310 | if ((tp->t_state&SPEEDS)==0) { |
8062c8a7 BJ |
311 | tp->t_ispeed = iocb.sg_ispeed; |
312 | tp->t_ospeed = iocb.sg_ospeed; | |
89dc6dfb | 313 | } |
8062c8a7 BJ |
314 | tp->t_erase = iocb.sg_erase; |
315 | tp->t_kill = iocb.sg_kill; | |
316 | tp->t_flags = iocb.sg_flags; | |
101ba270 | 317 | (void) spl0(); |
89dc6dfb BJ |
318 | break; |
319 | ||
320 | /* | |
321 | * send current parameters to user | |
322 | */ | |
323 | case TIOCGETP: | |
8062c8a7 BJ |
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; | |
89dc6dfb BJ |
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); | |
343 | break; | |
344 | ||
345 | /* | |
346 | * ioctl entries to line discipline | |
347 | */ | |
348 | case DIOCSETP: | |
349 | case DIOCGETP: | |
101ba270 BJ |
350 | if ((*linesw[tp->t_line].l_ioctl)(com, tp, addr)) |
351 | u.u_error = ENOTTY; | |
89dc6dfb BJ |
352 | break; |
353 | ||
354 | /* | |
355 | * set and fetch special characters | |
356 | */ | |
357 | case TIOCSETC: | |
8062c8a7 | 358 | if (copyin(addr, (caddr_t)&tun, sizeof(struct tchars))) |
89dc6dfb BJ |
359 | u.u_error = EFAULT; |
360 | break; | |
361 | ||
362 | case TIOCGETC: | |
8062c8a7 BJ |
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: { | |
d1778415 | 379 | off_t nread; |
8062c8a7 | 380 | |
d1778415 BJ |
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 | } | |
8062c8a7 BJ |
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 | tp->t_pgrp = (int)addr; | |
407 | break; | |
408 | ||
409 | case TIOCGPGRP: | |
410 | if (copyout((caddr_t)&tp->t_pgrp, addr, sizeof(tp->t_pgrp))) | |
411 | u.u_error = EFAULT; | |
412 | break; | |
413 | ||
414 | /* | |
415 | * Modify local mode word. | |
416 | */ | |
417 | case TIOCLBIS: | |
418 | tp->t_local |= (int)addr; | |
419 | break; | |
420 | ||
421 | case TIOCLBIC: | |
422 | tp->t_local &= ~(int)addr; | |
423 | break; | |
424 | ||
425 | case TIOCLSET: | |
426 | tp->t_local = (int)addr; | |
427 | break; | |
428 | ||
429 | case TIOCLGET: | |
430 | if (copyout((caddr_t)&tp->t_local, addr, sizeof(tp->t_local))) | |
89dc6dfb BJ |
431 | u.u_error = EFAULT; |
432 | break; | |
433 | ||
0dde1c43 BJ |
434 | case TIOCOUTQ: |
435 | if (copyout((caddr_t)&tp->t_outq.c_cc, addr, sizeof(tp->t_outq.c_cc))) | |
436 | u.u_error = EFAULT; | |
437 | break; | |
438 | ||
8062c8a7 | 439 | /* end of locals */ |
89dc6dfb BJ |
440 | default: |
441 | return(0); | |
442 | } | |
443 | return(1); | |
444 | } | |
445 | ||
446 | /* | |
447 | * Wait for output to drain, then flush input waiting. | |
448 | */ | |
449 | wflushtty(tp) | |
450 | register struct tty *tp; | |
451 | { | |
452 | ||
101ba270 | 453 | (void) spl5(); |
89dc6dfb BJ |
454 | while (tp->t_outq.c_cc && tp->t_state&CARR_ON) { |
455 | (*tp->t_oproc)(tp); | |
456 | tp->t_state |= ASLEEP; | |
457 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
458 | } | |
459 | flushtty(tp); | |
101ba270 | 460 | (void) spl0(); |
89dc6dfb BJ |
461 | } |
462 | ||
463 | /* | |
464 | * flush all TTY queues | |
465 | */ | |
466 | flushtty(tp) | |
467 | register struct tty *tp; | |
468 | { | |
469 | register s; | |
470 | ||
d1778415 BJ |
471 | if (tp->t_line == NETLDISC) |
472 | return; | |
101ba270 | 473 | s = spl6(); |
89dc6dfb BJ |
474 | while (getc(&tp->t_canq) >= 0) |
475 | ; | |
476 | wakeup((caddr_t)&tp->t_rawq); | |
477 | wakeup((caddr_t)&tp->t_outq); | |
89dc6dfb BJ |
478 | tp->t_state &= ~TTSTOP; |
479 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); | |
480 | while (getc(&tp->t_outq) >= 0) | |
481 | ; | |
482 | while (getc(&tp->t_rawq) >= 0) | |
483 | ; | |
484 | tp->t_delct = 0; | |
8062c8a7 | 485 | tp->t_rocount = 0; /* local */ |
6fdc0335 | 486 | tp->t_lstate = 0; |
89dc6dfb BJ |
487 | splx(s); |
488 | } | |
489 | ||
490 | ||
491 | ||
492 | /* | |
493 | * transfer raw input list to canonical list, | |
494 | * doing erase-kill processing and handling escapes. | |
495 | * It waits until a full line has been typed in cooked mode, | |
496 | * or until any character has been typed in raw mode. | |
497 | */ | |
498 | canon(tp) | |
499 | register struct tty *tp; | |
500 | { | |
501 | register char *bp; | |
502 | char *bp1; | |
503 | register int c; | |
504 | int mc; | |
505 | int s; | |
506 | ||
507 | if ((tp->t_flags&(RAW|CBREAK))==0 && tp->t_delct==0 | |
508 | || (tp->t_flags&(RAW|CBREAK))!=0 && tp->t_rawq.c_cc==0) { | |
509 | return(-1); | |
510 | } | |
511 | s = spl0(); | |
512 | loop: | |
513 | bp = &canonb[2]; | |
514 | while ((c=getc(&tp->t_rawq)) >= 0) { | |
515 | if ((tp->t_flags&(RAW|CBREAK))==0) { | |
516 | if (c==0377) { | |
517 | tp->t_delct--; | |
518 | break; | |
519 | } | |
520 | if (bp[-1]!='\\') { | |
521 | if (c==tp->t_erase) { | |
522 | if (bp > &canonb[2]) | |
523 | bp--; | |
524 | continue; | |
525 | } | |
526 | if (c==tp->t_kill) | |
527 | goto loop; | |
528 | if (c==tun.t_eofc) | |
529 | continue; | |
530 | } else { | |
531 | mc = maptab[c]; | |
532 | if (c==tp->t_erase || c==tp->t_kill) | |
533 | mc = c; | |
534 | if (mc && (mc==c || (tp->t_flags&LCASE))) { | |
535 | if (bp[-2] != '\\') | |
536 | c = mc; | |
537 | bp--; | |
538 | } | |
539 | } | |
540 | } | |
541 | *bp++ = c; | |
542 | if (bp>=canonb+CANBSIZ) | |
543 | break; | |
544 | } | |
545 | bp1 = &canonb[2]; | |
101ba270 | 546 | (void) b_to_q(bp1, bp-bp1, &tp->t_canq); |
89dc6dfb BJ |
547 | |
548 | if (tp->t_state&TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { | |
549 | if (putc(tun.t_startc, &tp->t_outq)==0) { | |
550 | tp->t_state &= ~TBLOCK; | |
551 | ttstart(tp); | |
552 | } | |
553 | tp->t_char = 0; | |
554 | } | |
555 | ||
556 | splx(s); | |
557 | return(0); | |
558 | } | |
559 | ||
560 | ||
561 | /* | |
562 | * block transfer input handler. | |
563 | */ | |
564 | ttyrend(tp, pb, pe) | |
565 | register struct tty *tp; | |
566 | register char *pb, *pe; | |
567 | { | |
568 | int tandem; | |
569 | ||
570 | tandem = tp->t_flags&TANDEM; | |
571 | if (tp->t_flags&RAW) { | |
101ba270 | 572 | (void) b_to_q(pb, pe-pb, &tp->t_rawq); |
89dc6dfb | 573 | if (tp->t_chan) |
101ba270 | 574 | (void) sdata(tp->t_chan); else |
89dc6dfb BJ |
575 | wakeup((caddr_t)&tp->t_rawq); |
576 | } else { | |
577 | tp->t_flags &= ~TANDEM; | |
578 | while (pb < pe) | |
579 | ttyinput(*pb++, tp); | |
580 | tp->t_flags |= tandem; | |
581 | } | |
582 | if (tandem) | |
583 | ttyblock(tp); | |
584 | } | |
585 | ||
586 | /* | |
587 | * Place a character on raw TTY input queue, putting in delimiters | |
588 | * and waking up top half as needed. | |
589 | * Also echo if required. | |
590 | * The arguments are the character and the appropriate | |
591 | * tty structure. | |
592 | */ | |
593 | ttyinput(c, tp) | |
594 | register c; | |
595 | register struct tty *tp; | |
596 | { | |
597 | register int t_flags; | |
598 | register struct chan *cp; | |
599 | ||
600 | tk_nin += 1; | |
601 | c &= 0377; | |
602 | t_flags = tp->t_flags; | |
603 | if (t_flags&TANDEM) | |
604 | ttyblock(tp); | |
605 | if ((t_flags&RAW)==0) { | |
606 | c &= 0177; | |
607 | if (tp->t_state&TTSTOP) { | |
608 | if (c==tun.t_startc) { | |
609 | tp->t_state &= ~TTSTOP; | |
610 | ttstart(tp); | |
611 | return; | |
612 | } | |
613 | if (c==tun.t_stopc) | |
614 | return; | |
615 | tp->t_state &= ~TTSTOP; | |
616 | ttstart(tp); | |
617 | } else { | |
618 | if (c==tun.t_stopc) { | |
619 | tp->t_state |= TTSTOP; | |
620 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); | |
621 | return; | |
622 | } | |
623 | if (c==tun.t_startc) | |
624 | return; | |
625 | } | |
626 | if (c==tun.t_quitc || c==tun.t_intrc) { | |
627 | flushtty(tp); | |
628 | c = (c==tun.t_intrc) ? SIGINT:SIGQUIT; | |
629 | if (tp->t_chan) | |
630 | scontrol(tp->t_chan, M_SIG, c); | |
631 | else | |
8062c8a7 | 632 | gsignal(tp->t_pgrp, c); |
89dc6dfb BJ |
633 | return; |
634 | } | |
635 | if (c=='\r' && t_flags&CRMOD) | |
636 | c = '\n'; | |
637 | } | |
638 | if (tp->t_rawq.c_cc>TTYHOG) { | |
639 | flushtty(tp); | |
640 | return; | |
641 | } | |
642 | if (t_flags&LCASE && c>='A' && c<='Z') | |
643 | c += 'a'-'A'; | |
101ba270 | 644 | (void) putc(c, &tp->t_rawq); |
89dc6dfb BJ |
645 | if (t_flags&(RAW|CBREAK)||(c=='\n'||c==tun.t_eofc||c==tun.t_brkc)) { |
646 | if ((t_flags&(RAW|CBREAK))==0 && putc(0377, &tp->t_rawq)==0) | |
647 | tp->t_delct++; | |
648 | if ((cp=tp->t_chan)!=NULL) | |
101ba270 | 649 | (void) sdata(cp); else |
89dc6dfb BJ |
650 | wakeup((caddr_t)&tp->t_rawq); |
651 | } | |
652 | if (t_flags&ECHO) { | |
653 | ttyoutput(c, tp); | |
654 | if (c==tp->t_kill && (t_flags&(RAW|CBREAK))==0) | |
655 | ttyoutput('\n', tp); | |
656 | ttstart(tp); | |
657 | } | |
658 | } | |
659 | ||
660 | ||
661 | /* | |
662 | * Send stop character on input overflow. | |
663 | */ | |
664 | ttyblock(tp) | |
665 | register struct tty *tp; | |
666 | { | |
667 | register x; | |
668 | x = q1.c_cc + q2.c_cc; | |
669 | if (q1.c_cc > TTYHOG) { | |
670 | flushtty(tp); | |
671 | tp->t_state &= ~TBLOCK; | |
672 | } | |
673 | if (x >= TTYHOG/2) { | |
674 | if (putc(tun.t_stopc, &tp->t_outq)==0) { | |
675 | tp->t_state |= TBLOCK; | |
676 | tp->t_char++; | |
677 | ttstart(tp); | |
678 | } | |
679 | } | |
680 | } | |
681 | ||
682 | /* | |
683 | * put character on TTY output queue, adding delays, | |
684 | * expanding tabs, and handling the CR/NL bit. | |
685 | * It is called both from the top half for output, and from | |
686 | * interrupt level for echoing. | |
687 | * The arguments are the character and the tty structure. | |
688 | */ | |
689 | ttyoutput(c, tp) | |
690 | register c; | |
691 | register struct tty *tp; | |
692 | { | |
693 | register char *colp; | |
694 | register ctype; | |
695 | ||
89dc6dfb BJ |
696 | /* |
697 | * Ignore EOT in normal mode to avoid hanging up | |
698 | * certain terminals. | |
699 | * In raw mode dump the char unchanged. | |
700 | */ | |
89dc6dfb BJ |
701 | if ((tp->t_flags&RAW)==0) { |
702 | c &= 0177; | |
703 | if ((tp->t_flags&CBREAK)==0 && c==CEOT) | |
704 | return; | |
705 | } else { | |
101ba270 BJ |
706 | tk_nout++; |
707 | (void) putc(c, &tp->t_outq); | |
89dc6dfb BJ |
708 | return; |
709 | } | |
710 | ||
711 | /* | |
712 | * Turn tabs to spaces as required | |
713 | */ | |
714 | if (c=='\t' && (tp->t_flags&TBDELAY)==XTABS) { | |
101ba270 BJ |
715 | c = 8 - (tp->t_col & 7); |
716 | (void) b_to_q(" ", c, &tp->t_outq); | |
717 | tp->t_col += c; | |
718 | tk_nout += c; | |
89dc6dfb BJ |
719 | return; |
720 | } | |
101ba270 | 721 | tk_nout++; |
89dc6dfb BJ |
722 | /* |
723 | * for upper-case-only terminals, | |
724 | * generate escapes. | |
725 | */ | |
726 | if (tp->t_flags&LCASE) { | |
727 | colp = "({)}!|^~'`"; | |
728 | while(*colp++) | |
729 | if(c == *colp++) { | |
730 | ttyoutput('\\', tp); | |
731 | c = colp[-2]; | |
732 | break; | |
733 | } | |
734 | if ('a'<=c && c<='z') | |
735 | c += 'A' - 'a'; | |
736 | } | |
737 | /* | |
738 | * turn <nl> to <cr><lf> if desired. | |
739 | */ | |
740 | if (c=='\n' && tp->t_flags&CRMOD) | |
741 | ttyoutput('\r', tp); | |
101ba270 | 742 | (void) putc(c, &tp->t_outq); |
89dc6dfb BJ |
743 | /* |
744 | * Calculate delays. | |
745 | * The numbers here represent clock ticks | |
746 | * and are not necessarily optimal for all terminals. | |
747 | * The delays are indicated by characters above 0200. | |
748 | * In raw mode there are no delays and the | |
749 | * transmission path is 8 bits wide. | |
750 | */ | |
751 | colp = &tp->t_col; | |
752 | ctype = partab[c]; | |
753 | c = 0; | |
754 | switch (ctype&077) { | |
755 | ||
756 | /* ordinary */ | |
757 | case 0: | |
758 | (*colp)++; | |
759 | ||
760 | /* non-printing */ | |
761 | case 1: | |
762 | break; | |
763 | ||
764 | /* backspace */ | |
765 | case 2: | |
766 | if (*colp) | |
767 | (*colp)--; | |
768 | break; | |
769 | ||
770 | /* newline */ | |
771 | case 3: | |
772 | ctype = (tp->t_flags >> 8) & 03; | |
773 | if(ctype == 1) { /* tty 37 */ | |
774 | if (*colp) | |
775 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); | |
776 | } else | |
777 | if(ctype == 2) { /* vt05 */ | |
778 | c = 6; | |
779 | } | |
780 | *colp = 0; | |
781 | break; | |
782 | ||
783 | /* tab */ | |
784 | case 4: | |
785 | ctype = (tp->t_flags >> 10) & 03; | |
786 | if(ctype == 1) { /* tty 37 */ | |
787 | c = 1 - (*colp | ~07); | |
788 | if(c < 5) | |
789 | c = 0; | |
790 | } | |
791 | *colp |= 07; | |
792 | (*colp)++; | |
793 | break; | |
794 | ||
795 | /* vertical motion */ | |
796 | case 5: | |
797 | if(tp->t_flags & VTDELAY) /* tty 37 */ | |
798 | c = 0177; | |
799 | break; | |
800 | ||
801 | /* carriage return */ | |
802 | case 6: | |
803 | ctype = (tp->t_flags >> 12) & 03; | |
804 | if(ctype == 1) { /* tn 300 */ | |
805 | c = 5; | |
806 | } else if(ctype == 2) { /* ti 700 */ | |
807 | c = 10; | |
808 | } else if(ctype == 3) { /* concept 100 */ | |
809 | int i; | |
810 | for (i= *colp; i<9; i++) | |
101ba270 | 811 | (void) putc(0177, &tp->t_outq); |
89dc6dfb BJ |
812 | } |
813 | *colp = 0; | |
814 | } | |
815 | if(c) | |
101ba270 | 816 | (void) putc(c|0200, &tp->t_outq); |
89dc6dfb BJ |
817 | } |
818 | ||
819 | /* | |
820 | * Restart typewriter output following a delay | |
821 | * timeout. | |
822 | * The name of the routine is passed to the timeout | |
823 | * subroutine and it is called during a clock interrupt. | |
824 | */ | |
825 | ttrstrt(tp) | |
826 | register struct tty *tp; | |
827 | { | |
828 | ||
829 | tp->t_state &= ~TIMEOUT; | |
830 | ttstart(tp); | |
831 | } | |
832 | ||
833 | /* | |
834 | * Start output on the typewriter. It is used from the top half | |
835 | * after some characters have been put on the output queue, | |
836 | * from the interrupt routine to transmit the next | |
837 | * character, and after a timeout has finished. | |
838 | */ | |
839 | ttstart(tp) | |
840 | register struct tty *tp; | |
841 | { | |
842 | register s; | |
843 | ||
844 | s = spl5(); | |
845 | if((tp->t_state&(TIMEOUT|TTSTOP|BUSY)) == 0) | |
846 | (*tp->t_oproc)(tp); | |
847 | splx(s); | |
848 | } | |
849 | ||
850 | /* | |
851 | * Called from device's read routine after it has | |
852 | * calculated the tty-structure given as argument. | |
853 | */ | |
854 | ttread(tp) | |
855 | register struct tty *tp; | |
856 | { | |
857 | register s; | |
858 | ||
859 | if ((tp->t_state&CARR_ON)==0) | |
860 | return(-1); | |
861 | s = spl5(); | |
862 | if (tp->t_canq.c_cc==0) | |
863 | while (canon(tp)<0) | |
864 | if (tp->t_chan==NULL) { | |
865 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
866 | } else { | |
867 | splx(s); | |
868 | return(0); | |
869 | } | |
870 | splx(s); | |
871 | while (tp->t_canq.c_cc && passc(getc(&tp->t_canq))>=0) | |
872 | ; | |
873 | return(tp->t_rawq.c_cc+tp->t_canq.c_cc); | |
874 | } | |
875 | ||
876 | /* | |
877 | * Called from the device's write routine after it has | |
878 | * calculated the tty-structure given as argument. | |
879 | */ | |
880 | caddr_t | |
881 | ttwrite(tp) | |
882 | register struct tty *tp; | |
883 | { | |
884 | /* | |
885 | * THE POSITIONING OF CP, CC, AND CE ARE CRITICAL | |
886 | * AND MUST NOT BE CHANGED WITHOUT PATCHING | |
887 | * THE 'ASM' INLINES BELOW. WATCH OUT. | |
888 | */ | |
889 | register char *cp; | |
890 | register int cc, ce; | |
891 | register i; | |
892 | char obuf[OBUFSIZ]; | |
893 | ||
894 | if ((tp->t_state&CARR_ON)==0) | |
895 | return(NULL); | |
896 | while (u.u_count) { | |
897 | cc = MIN(u.u_count, OBUFSIZ); | |
898 | cp = obuf; | |
899 | iomove(cp, (unsigned)cc, B_WRITE); | |
900 | if (u.u_error) | |
901 | break; | |
101ba270 | 902 | (void) spl5(); |
89dc6dfb BJ |
903 | while (tp->t_outq.c_cc > TTHIWAT) { |
904 | ttstart(tp); | |
905 | tp->t_state |= ASLEEP; | |
906 | if (tp->t_chan) { | |
907 | u.u_base -= cc; | |
908 | u.u_offset -= cc; | |
909 | u.u_count += cc; | |
101ba270 | 910 | (void) spl0(); |
89dc6dfb BJ |
911 | return((caddr_t)&tp->t_outq); |
912 | } | |
913 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
914 | } | |
101ba270 | 915 | (void) spl0(); |
89dc6dfb BJ |
916 | if (tp->t_flags&LCASE) { |
917 | while (cc--) | |
918 | ttyoutput(*cp++,tp); | |
919 | continue; | |
920 | } | |
921 | while (cc) { | |
922 | if (tp->t_flags&RAW) | |
923 | ce=cc; | |
924 | else { | |
925 | #ifdef VAX | |
926 | asm(" scanc r9,(r10),_partab,$077"); | |
927 | asm(" subl3 r0,r9,r8"); | |
928 | #else | |
929 | ce=0; | |
930 | while(((partab[*(cp+ce)]&077)==0)&&(ce<cc)) | |
931 | ce++; | |
932 | #endif | |
933 | if (ce==0) { | |
934 | ttyoutput(*cp++,tp); | |
935 | cc--; | |
101ba270 | 936 | goto check; |
89dc6dfb BJ |
937 | } |
938 | } | |
939 | i=b_to_q(cp,ce,&tp->t_outq); | |
940 | ce-=i; | |
941 | tk_nout+=ce; | |
942 | tp->t_col+=ce; | |
943 | cp+=ce; | |
944 | cc-=ce; | |
101ba270 BJ |
945 | check: |
946 | if (tp->t_outq.c_cc > TTHIWAT) { | |
947 | (void) spl5(); | |
89dc6dfb BJ |
948 | while (tp->t_outq.c_cc > TTHIWAT) { |
949 | ttstart(tp); | |
950 | tp->t_state |= ASLEEP; | |
951 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
952 | } | |
101ba270 | 953 | (void) spl0(); |
89dc6dfb BJ |
954 | } |
955 | } | |
956 | } | |
957 | ttstart(tp); | |
958 | return(NULL); | |
959 | } |