Commit | Line | Data |
---|---|---|
8062c8a7 | 1 | /* tty.c 3.4 %H% */ |
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" | |
18 | ||
19 | char partab[]; | |
20 | ||
d3ebf5ee BJ |
21 | /* |
22 | * When running dz's using only SAE (silo alarm) on input | |
23 | * it is necessary to call dzrint() at clock interrupt time. | |
24 | * This is unsafe unless spl5()s in tty code are changed to | |
25 | * spl6()s to block clock interrupts. Note that the dh driver | |
26 | * currently in use works the same way as the dz, even though | |
27 | * we could try to more intelligently manage its silo. | |
28 | * Thus don't take this out if you have no dz's unless you | |
29 | * change clock.c and dhtimer(). | |
30 | */ | |
31 | #define spl5 spl6 | |
89dc6dfb BJ |
32 | |
33 | /* | |
34 | * Input mapping table-- if an entry is non-zero, when the | |
35 | * corresponding character is typed preceded by "\" the escape | |
36 | * sequence is replaced by the table value. Mostly used for | |
37 | * upper-case only terminals. | |
38 | */ | |
39 | ||
40 | char maptab[] ={ | |
41 | 000,000,000,000,000,000,000,000, | |
42 | 000,000,000,000,000,000,000,000, | |
43 | 000,000,000,000,000,000,000,000, | |
44 | 000,000,000,000,000,000,000,000, | |
45 | 000,'|',000,000,000,000,000,'`', | |
46 | '{','}',000,000,000,000,000,000, | |
47 | 000,000,000,000,000,000,000,000, | |
48 | 000,000,000,000,000,000,000,000, | |
49 | 000,000,000,000,000,000,000,000, | |
50 | 000,000,000,000,000,000,000,000, | |
51 | 000,000,000,000,000,000,000,000, | |
52 | 000,000,000,000,000,000,'~',000, | |
53 | 000,'A','B','C','D','E','F','G', | |
54 | 'H','I','J','K','L','M','N','O', | |
55 | 'P','Q','R','S','T','U','V','W', | |
56 | 'X','Y','Z',000,000,000,000,000, | |
57 | }; | |
58 | ||
59 | ||
60 | /* | |
61 | * shorthand | |
62 | */ | |
63 | #define q1 tp->t_rawq | |
64 | #define q2 tp->t_canq | |
65 | #define q3 tp->t_outq | |
66 | #define q4 tp->t_un.t_ctlq | |
67 | ||
68 | #define OBUFSIZ 100 | |
69 | ||
70 | /* | |
71 | * routine called on first teletype open. | |
72 | * establishes a process group for distribution | |
73 | * of quits and interrupts from the tty. | |
74 | */ | |
75 | ttyopen(dev, tp) | |
76 | dev_t dev; | |
77 | register struct tty *tp; | |
78 | { | |
79 | register struct proc *pp; | |
80 | ||
81 | pp = u.u_procp; | |
82 | tp->t_dev = dev; | |
83 | if(pp->p_pgrp == 0) { | |
84 | u.u_ttyp = tp; | |
85 | u.u_ttyd = dev; | |
8062c8a7 | 86 | tp->t_pgrp = pp->p_pid; |
89dc6dfb BJ |
87 | pp->p_pgrp = tp->t_pgrp; |
88 | } | |
89 | tp->t_state &= ~WOPEN; | |
90 | tp->t_state |= ISOPEN; | |
8062c8a7 | 91 | tp->t_line = 0; /* conservative */ |
89dc6dfb BJ |
92 | } |
93 | ||
89dc6dfb BJ |
94 | /* |
95 | * set default control characters. | |
96 | */ | |
97 | ttychars(tp) | |
98 | register struct tty *tp; | |
99 | { | |
8062c8a7 | 100 | |
89dc6dfb BJ |
101 | tun.t_intrc = CINTR; |
102 | tun.t_quitc = CQUIT; | |
103 | tun.t_startc = CSTART; | |
104 | tun.t_stopc = CSTOP; | |
105 | tun.t_eofc = CEOT; | |
106 | tun.t_brkc = CBRK; | |
107 | tp->t_erase = CERASE; | |
108 | tp->t_kill = CKILL; | |
8062c8a7 BJ |
109 | /* begin local */ |
110 | tlun.t_suspc = 0377; | |
111 | tlun.t_dstopc = 0377; | |
112 | tlun.t_rprntc = CTRL(r); | |
113 | tlun.t_flushc = CTRL(o); | |
114 | tlun.t_werasc = CTRL(w); | |
115 | tlun.t_lnextc = CTRL(v); | |
116 | tlun.t_lintr = CTRL(c); | |
117 | tlun.t_lerase = CTRL(h); | |
118 | tlun.t_lkill = CTRL(u); | |
119 | tp->t_local = 0; | |
120 | tp->t_lstate = 0; | |
121 | /* end local */ | |
89dc6dfb BJ |
122 | } |
123 | ||
124 | /* | |
125 | * clean tp on last close | |
126 | */ | |
127 | ttyclose(tp) | |
128 | register struct tty *tp; | |
129 | { | |
130 | ||
131 | tp->t_pgrp = 0; | |
132 | wflushtty(tp); | |
133 | tp->t_state = 0; | |
8062c8a7 | 134 | tp->t_line = 0; |
89dc6dfb BJ |
135 | } |
136 | ||
137 | /* | |
138 | * stty/gtty writearound | |
139 | */ | |
140 | stty() | |
141 | { | |
142 | u.u_arg[2] = u.u_arg[1]; | |
143 | u.u_arg[1] = TIOCSETP; | |
144 | ioctl(); | |
145 | } | |
146 | ||
147 | gtty() | |
148 | { | |
149 | u.u_arg[2] = u.u_arg[1]; | |
150 | u.u_arg[1] = TIOCGETP; | |
151 | ioctl(); | |
152 | } | |
153 | ||
101ba270 BJ |
154 | /* |
155 | * Do nothing specific version of line | |
156 | * discipline specific ioctl command. | |
157 | */ | |
158 | nullioctl(tp, cmd, addr) | |
159 | register struct tty *tp; | |
160 | caddr_t addr; | |
161 | { | |
162 | ||
163 | return (cmd); | |
164 | } | |
165 | ||
89dc6dfb BJ |
166 | /* |
167 | * ioctl system call | |
168 | * Check legality, execute common code, and switch out to individual | |
169 | * device routine. | |
170 | */ | |
171 | ioctl() | |
172 | { | |
173 | register struct file *fp; | |
174 | register struct inode *ip; | |
175 | register struct a { | |
176 | int fdes; | |
177 | int cmd; | |
178 | caddr_t cmarg; | |
179 | } *uap; | |
180 | register dev_t dev; | |
181 | register fmt; | |
182 | ||
183 | uap = (struct a *)u.u_ap; | |
184 | if ((fp = getf(uap->fdes)) == NULL) | |
185 | return; | |
186 | if (uap->cmd==FIOCLEX) { | |
187 | u.u_pofile[uap->fdes] |= EXCLOSE; | |
188 | return; | |
189 | } | |
190 | if (uap->cmd==FIONCLEX) { | |
191 | u.u_pofile[uap->fdes] &= ~EXCLOSE; | |
192 | return; | |
193 | } | |
194 | ip = fp->f_inode; | |
195 | fmt = ip->i_mode & IFMT; | |
196 | if (fmt != IFCHR && fmt != IFMPC) { | |
8062c8a7 BJ |
197 | /* begin local */ |
198 | if (uap->cmd==FIONREAD && (fmt == IFREG || fmt == IFDIR)) { | |
199 | off_t nread = ip->i_size - fp->f_un.f_offset; | |
200 | ||
201 | if (copyout((caddr_t)&nread, uap->cmarg, sizeof(off_t))) | |
202 | u.u_error = EFAULT; | |
203 | } else | |
204 | /* end local */ | |
205 | u.u_error = ENOTTY; | |
89dc6dfb BJ |
206 | return; |
207 | } | |
208 | dev = ip->i_un.i_rdev; | |
209 | u.u_r.r_val1 = 0; | |
210 | (*cdevsw[major(dev)].d_ioctl)(dev, uap->cmd, uap->cmarg, fp->f_flag); | |
211 | } | |
212 | ||
213 | /* | |
214 | * Common code for several tty ioctl commands | |
215 | */ | |
216 | ttioccomm(com, tp, addr, dev) | |
217 | register struct tty *tp; | |
218 | caddr_t addr; | |
219 | { | |
220 | unsigned t; | |
8062c8a7 | 221 | struct sgttyb iocb; |
89dc6dfb BJ |
222 | extern int nldisp; |
223 | ||
224 | switch(com) { | |
225 | ||
226 | /* | |
227 | * get discipline number | |
228 | */ | |
229 | case TIOCGETD: | |
230 | t = tp->t_line; | |
231 | if (copyout((caddr_t)&t, addr, sizeof(t))) | |
232 | u.u_error = EFAULT; | |
233 | break; | |
234 | ||
235 | /* | |
236 | * set line discipline | |
237 | */ | |
238 | case TIOCSETD: | |
239 | if (copyin(addr, (caddr_t)&t, sizeof(t))) { | |
240 | u.u_error = EFAULT; | |
241 | break; | |
242 | } | |
243 | if (t >= nldisp) { | |
244 | u.u_error = ENXIO; | |
245 | break; | |
246 | } | |
8062c8a7 | 247 | (void) spl5(); |
89dc6dfb BJ |
248 | if (tp->t_line) |
249 | (*linesw[tp->t_line].l_close)(tp); | |
250 | if (t) | |
251 | (*linesw[t].l_open)(dev, tp, addr); | |
252 | if (u.u_error==0) | |
253 | tp->t_line = t; | |
8062c8a7 | 254 | (void) spl0(); |
89dc6dfb BJ |
255 | break; |
256 | ||
257 | /* | |
258 | * prevent more opens on channel | |
259 | */ | |
260 | case TIOCEXCL: | |
261 | tp->t_state |= XCLUDE; | |
262 | break; | |
263 | ||
264 | case TIOCNXCL: | |
265 | tp->t_state &= ~XCLUDE; | |
266 | break; | |
267 | ||
268 | /* | |
269 | * Set new parameters | |
270 | */ | |
271 | case TIOCSETP: | |
8062c8a7 BJ |
272 | case TIOCSETN: { |
273 | struct clist tq; | |
274 | register c; | |
275 | ||
89dc6dfb BJ |
276 | if (copyin(addr, (caddr_t)&iocb, sizeof(iocb))) { |
277 | u.u_error = EFAULT; | |
278 | return(1); | |
279 | } | |
101ba270 | 280 | (void) spl5(); |
8062c8a7 BJ |
281 | if (tp->t_line == 0) { |
282 | if (com == TIOCSETP) | |
283 | wflushtty(tp); | |
284 | while (canon(tp)>=0) | |
285 | ; | |
286 | } else if (tp->t_line == NTTYDISC) { | |
287 | if (tp->t_flags&RAW || iocb.sg_flags&RAW || | |
288 | com == TIOCSETP) | |
289 | wflushtty(tp); | |
290 | else if ((tp->t_flags&CBREAK) != (iocb.sg_flags&CBREAK)) { | |
291 | if (iocb.sg_flags & CBREAK) { | |
292 | catq(&tp->t_rawq, &tp->t_canq); | |
293 | tq = tp->t_rawq; | |
294 | tp->t_rawq = tp->t_canq; | |
295 | tp->t_canq = tq; | |
296 | } else { | |
297 | tp->t_local |= LPENDIN; | |
298 | if (tp->t_canq.c_cc) | |
299 | panic("ioccom canq"); | |
300 | if (tp->t_chan) | |
301 | (void) sdata(tp->t_chan); | |
302 | else | |
303 | wakeup((caddr_t)&tp->t_rawq); | |
304 | } | |
305 | } | |
306 | } | |
89dc6dfb | 307 | if ((tp->t_state&SPEEDS)==0) { |
8062c8a7 BJ |
308 | tp->t_ispeed = iocb.sg_ispeed; |
309 | tp->t_ospeed = iocb.sg_ospeed; | |
89dc6dfb | 310 | } |
8062c8a7 BJ |
311 | tp->t_erase = iocb.sg_erase; |
312 | tp->t_kill = iocb.sg_kill; | |
313 | tp->t_flags = iocb.sg_flags; | |
101ba270 | 314 | (void) spl0(); |
89dc6dfb | 315 | break; |
8062c8a7 | 316 | } |
89dc6dfb BJ |
317 | |
318 | /* | |
319 | * send current parameters to user | |
320 | */ | |
321 | case TIOCGETP: | |
8062c8a7 BJ |
322 | iocb.sg_ispeed = tp->t_ispeed; |
323 | iocb.sg_ospeed = tp->t_ospeed; | |
324 | iocb.sg_erase = tp->t_erase; | |
325 | iocb.sg_kill = tp->t_kill; | |
326 | iocb.sg_flags = tp->t_flags; | |
89dc6dfb BJ |
327 | if (copyout((caddr_t)&iocb, addr, sizeof(iocb))) |
328 | u.u_error = EFAULT; | |
329 | break; | |
330 | ||
331 | /* | |
332 | * Hang up line on last close | |
333 | */ | |
334 | ||
335 | case TIOCHPCL: | |
336 | tp->t_state |= HUPCLS; | |
337 | break; | |
338 | ||
339 | case TIOCFLUSH: | |
340 | flushtty(tp); | |
341 | break; | |
342 | ||
343 | /* | |
344 | * ioctl entries to line discipline | |
345 | */ | |
346 | case DIOCSETP: | |
347 | case DIOCGETP: | |
101ba270 BJ |
348 | if ((*linesw[tp->t_line].l_ioctl)(com, tp, addr)) |
349 | u.u_error = ENOTTY; | |
89dc6dfb BJ |
350 | break; |
351 | ||
352 | /* | |
353 | * set and fetch special characters | |
354 | */ | |
355 | case TIOCSETC: | |
8062c8a7 | 356 | if (copyin(addr, (caddr_t)&tun, sizeof(struct tchars))) |
89dc6dfb BJ |
357 | u.u_error = EFAULT; |
358 | break; | |
359 | ||
360 | case TIOCGETC: | |
8062c8a7 BJ |
361 | if (copyout((caddr_t)&tun, addr, sizeof(struct tchars))) |
362 | u.u_error = EFAULT; | |
363 | break; | |
364 | ||
365 | /* local ioctls */ | |
366 | case TIOCSLTC: | |
367 | if (copyin(addr, (caddr_t)&tlun, sizeof (struct ltchars))) | |
368 | u.u_error = EFAULT; | |
369 | break; | |
370 | ||
371 | case TIOCGLTC: | |
372 | if (copyout((caddr_t)&tlun, addr, sizeof (struct ltchars))) | |
373 | u.u_error = EFAULT; | |
374 | break; | |
375 | ||
376 | case FIONREAD: { | |
377 | off_t nread = tp->t_canq.c_cc; | |
378 | ||
379 | if (tp->t_flags & (RAW|CBREAK)) | |
380 | nread += tp->t_rawq.c_cc; | |
381 | if (copyout((caddr_t)&nread, addr, sizeof (off_t))) | |
382 | u.u_error = EFAULT; | |
383 | break; | |
384 | } | |
385 | ||
386 | /* | |
387 | * Should allow SPGRP and GPGRP only if tty open for reading. | |
388 | */ | |
389 | case TIOCSPGRP: | |
390 | tp->t_pgrp = (int)addr; | |
391 | break; | |
392 | ||
393 | case TIOCGPGRP: | |
394 | if (copyout((caddr_t)&tp->t_pgrp, addr, sizeof(tp->t_pgrp))) | |
395 | u.u_error = EFAULT; | |
396 | break; | |
397 | ||
398 | /* | |
399 | * Modify local mode word. | |
400 | */ | |
401 | case TIOCLBIS: | |
402 | tp->t_local |= (int)addr; | |
403 | break; | |
404 | ||
405 | case TIOCLBIC: | |
406 | tp->t_local &= ~(int)addr; | |
407 | break; | |
408 | ||
409 | case TIOCLSET: | |
410 | tp->t_local = (int)addr; | |
411 | break; | |
412 | ||
413 | case TIOCLGET: | |
414 | if (copyout((caddr_t)&tp->t_local, addr, sizeof(tp->t_local))) | |
89dc6dfb BJ |
415 | u.u_error = EFAULT; |
416 | break; | |
417 | ||
8062c8a7 | 418 | /* end of locals */ |
89dc6dfb BJ |
419 | default: |
420 | return(0); | |
421 | } | |
422 | return(1); | |
423 | } | |
424 | ||
425 | /* | |
426 | * Wait for output to drain, then flush input waiting. | |
427 | */ | |
428 | wflushtty(tp) | |
429 | register struct tty *tp; | |
430 | { | |
431 | ||
101ba270 | 432 | (void) spl5(); |
89dc6dfb BJ |
433 | while (tp->t_outq.c_cc && tp->t_state&CARR_ON) { |
434 | (*tp->t_oproc)(tp); | |
435 | tp->t_state |= ASLEEP; | |
436 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
437 | } | |
438 | flushtty(tp); | |
101ba270 | 439 | (void) spl0(); |
89dc6dfb BJ |
440 | } |
441 | ||
442 | /* | |
443 | * flush all TTY queues | |
444 | */ | |
445 | flushtty(tp) | |
446 | register struct tty *tp; | |
447 | { | |
448 | register s; | |
449 | ||
101ba270 | 450 | s = spl6(); |
89dc6dfb BJ |
451 | while (getc(&tp->t_canq) >= 0) |
452 | ; | |
453 | wakeup((caddr_t)&tp->t_rawq); | |
454 | wakeup((caddr_t)&tp->t_outq); | |
89dc6dfb BJ |
455 | tp->t_state &= ~TTSTOP; |
456 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); | |
457 | while (getc(&tp->t_outq) >= 0) | |
458 | ; | |
459 | while (getc(&tp->t_rawq) >= 0) | |
460 | ; | |
461 | tp->t_delct = 0; | |
8062c8a7 BJ |
462 | tp->t_rocount = 0; /* local */ |
463 | tp->t_lstate = 0; /* reset */ | |
89dc6dfb BJ |
464 | splx(s); |
465 | } | |
466 | ||
467 | ||
468 | ||
469 | /* | |
470 | * transfer raw input list to canonical list, | |
471 | * doing erase-kill processing and handling escapes. | |
472 | * It waits until a full line has been typed in cooked mode, | |
473 | * or until any character has been typed in raw mode. | |
474 | */ | |
475 | canon(tp) | |
476 | register struct tty *tp; | |
477 | { | |
478 | register char *bp; | |
479 | char *bp1; | |
480 | register int c; | |
481 | int mc; | |
482 | int s; | |
483 | ||
484 | if ((tp->t_flags&(RAW|CBREAK))==0 && tp->t_delct==0 | |
485 | || (tp->t_flags&(RAW|CBREAK))!=0 && tp->t_rawq.c_cc==0) { | |
486 | return(-1); | |
487 | } | |
488 | s = spl0(); | |
489 | loop: | |
490 | bp = &canonb[2]; | |
491 | while ((c=getc(&tp->t_rawq)) >= 0) { | |
492 | if ((tp->t_flags&(RAW|CBREAK))==0) { | |
493 | if (c==0377) { | |
494 | tp->t_delct--; | |
495 | break; | |
496 | } | |
497 | if (bp[-1]!='\\') { | |
498 | if (c==tp->t_erase) { | |
499 | if (bp > &canonb[2]) | |
500 | bp--; | |
501 | continue; | |
502 | } | |
503 | if (c==tp->t_kill) | |
504 | goto loop; | |
505 | if (c==tun.t_eofc) | |
506 | continue; | |
507 | } else { | |
508 | mc = maptab[c]; | |
509 | if (c==tp->t_erase || c==tp->t_kill) | |
510 | mc = c; | |
511 | if (mc && (mc==c || (tp->t_flags&LCASE))) { | |
512 | if (bp[-2] != '\\') | |
513 | c = mc; | |
514 | bp--; | |
515 | } | |
516 | } | |
517 | } | |
518 | *bp++ = c; | |
519 | if (bp>=canonb+CANBSIZ) | |
520 | break; | |
521 | } | |
522 | bp1 = &canonb[2]; | |
101ba270 | 523 | (void) b_to_q(bp1, bp-bp1, &tp->t_canq); |
89dc6dfb BJ |
524 | |
525 | if (tp->t_state&TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { | |
526 | if (putc(tun.t_startc, &tp->t_outq)==0) { | |
527 | tp->t_state &= ~TBLOCK; | |
528 | ttstart(tp); | |
529 | } | |
530 | tp->t_char = 0; | |
531 | } | |
532 | ||
533 | splx(s); | |
534 | return(0); | |
535 | } | |
536 | ||
537 | ||
538 | /* | |
539 | * block transfer input handler. | |
540 | */ | |
541 | ttyrend(tp, pb, pe) | |
542 | register struct tty *tp; | |
543 | register char *pb, *pe; | |
544 | { | |
545 | int tandem; | |
546 | ||
547 | tandem = tp->t_flags&TANDEM; | |
548 | if (tp->t_flags&RAW) { | |
101ba270 | 549 | (void) b_to_q(pb, pe-pb, &tp->t_rawq); |
89dc6dfb | 550 | if (tp->t_chan) |
101ba270 | 551 | (void) sdata(tp->t_chan); else |
89dc6dfb BJ |
552 | wakeup((caddr_t)&tp->t_rawq); |
553 | } else { | |
554 | tp->t_flags &= ~TANDEM; | |
555 | while (pb < pe) | |
556 | ttyinput(*pb++, tp); | |
557 | tp->t_flags |= tandem; | |
558 | } | |
559 | if (tandem) | |
560 | ttyblock(tp); | |
561 | } | |
562 | ||
563 | /* | |
564 | * Place a character on raw TTY input queue, putting in delimiters | |
565 | * and waking up top half as needed. | |
566 | * Also echo if required. | |
567 | * The arguments are the character and the appropriate | |
568 | * tty structure. | |
569 | */ | |
570 | ttyinput(c, tp) | |
571 | register c; | |
572 | register struct tty *tp; | |
573 | { | |
574 | register int t_flags; | |
575 | register struct chan *cp; | |
576 | ||
577 | tk_nin += 1; | |
578 | c &= 0377; | |
579 | t_flags = tp->t_flags; | |
580 | if (t_flags&TANDEM) | |
581 | ttyblock(tp); | |
582 | if ((t_flags&RAW)==0) { | |
583 | c &= 0177; | |
584 | if (tp->t_state&TTSTOP) { | |
585 | if (c==tun.t_startc) { | |
586 | tp->t_state &= ~TTSTOP; | |
587 | ttstart(tp); | |
588 | return; | |
589 | } | |
590 | if (c==tun.t_stopc) | |
591 | return; | |
592 | tp->t_state &= ~TTSTOP; | |
593 | ttstart(tp); | |
594 | } else { | |
595 | if (c==tun.t_stopc) { | |
596 | tp->t_state |= TTSTOP; | |
597 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); | |
598 | return; | |
599 | } | |
600 | if (c==tun.t_startc) | |
601 | return; | |
602 | } | |
603 | if (c==tun.t_quitc || c==tun.t_intrc) { | |
604 | flushtty(tp); | |
605 | c = (c==tun.t_intrc) ? SIGINT:SIGQUIT; | |
606 | if (tp->t_chan) | |
607 | scontrol(tp->t_chan, M_SIG, c); | |
608 | else | |
8062c8a7 | 609 | gsignal(tp->t_pgrp, c); |
89dc6dfb BJ |
610 | return; |
611 | } | |
612 | if (c=='\r' && t_flags&CRMOD) | |
613 | c = '\n'; | |
614 | } | |
615 | if (tp->t_rawq.c_cc>TTYHOG) { | |
616 | flushtty(tp); | |
617 | return; | |
618 | } | |
619 | if (t_flags&LCASE && c>='A' && c<='Z') | |
620 | c += 'a'-'A'; | |
101ba270 | 621 | (void) putc(c, &tp->t_rawq); |
89dc6dfb BJ |
622 | if (t_flags&(RAW|CBREAK)||(c=='\n'||c==tun.t_eofc||c==tun.t_brkc)) { |
623 | if ((t_flags&(RAW|CBREAK))==0 && putc(0377, &tp->t_rawq)==0) | |
624 | tp->t_delct++; | |
625 | if ((cp=tp->t_chan)!=NULL) | |
101ba270 | 626 | (void) sdata(cp); else |
89dc6dfb BJ |
627 | wakeup((caddr_t)&tp->t_rawq); |
628 | } | |
629 | if (t_flags&ECHO) { | |
630 | ttyoutput(c, tp); | |
631 | if (c==tp->t_kill && (t_flags&(RAW|CBREAK))==0) | |
632 | ttyoutput('\n', tp); | |
633 | ttstart(tp); | |
634 | } | |
635 | } | |
636 | ||
637 | ||
638 | /* | |
639 | * Send stop character on input overflow. | |
640 | */ | |
641 | ttyblock(tp) | |
642 | register struct tty *tp; | |
643 | { | |
644 | register x; | |
645 | x = q1.c_cc + q2.c_cc; | |
646 | if (q1.c_cc > TTYHOG) { | |
647 | flushtty(tp); | |
648 | tp->t_state &= ~TBLOCK; | |
649 | } | |
650 | if (x >= TTYHOG/2) { | |
651 | if (putc(tun.t_stopc, &tp->t_outq)==0) { | |
652 | tp->t_state |= TBLOCK; | |
653 | tp->t_char++; | |
654 | ttstart(tp); | |
655 | } | |
656 | } | |
657 | } | |
658 | ||
659 | /* | |
660 | * put character on TTY output queue, adding delays, | |
661 | * expanding tabs, and handling the CR/NL bit. | |
662 | * It is called both from the top half for output, and from | |
663 | * interrupt level for echoing. | |
664 | * The arguments are the character and the tty structure. | |
665 | */ | |
666 | ttyoutput(c, tp) | |
667 | register c; | |
668 | register struct tty *tp; | |
669 | { | |
670 | register char *colp; | |
671 | register ctype; | |
672 | ||
89dc6dfb BJ |
673 | /* |
674 | * Ignore EOT in normal mode to avoid hanging up | |
675 | * certain terminals. | |
676 | * In raw mode dump the char unchanged. | |
677 | */ | |
89dc6dfb BJ |
678 | if ((tp->t_flags&RAW)==0) { |
679 | c &= 0177; | |
680 | if ((tp->t_flags&CBREAK)==0 && c==CEOT) | |
681 | return; | |
682 | } else { | |
101ba270 BJ |
683 | tk_nout++; |
684 | (void) putc(c, &tp->t_outq); | |
89dc6dfb BJ |
685 | return; |
686 | } | |
687 | ||
688 | /* | |
689 | * Turn tabs to spaces as required | |
690 | */ | |
691 | if (c=='\t' && (tp->t_flags&TBDELAY)==XTABS) { | |
101ba270 BJ |
692 | c = 8 - (tp->t_col & 7); |
693 | (void) b_to_q(" ", c, &tp->t_outq); | |
694 | tp->t_col += c; | |
695 | tk_nout += c; | |
89dc6dfb BJ |
696 | return; |
697 | } | |
101ba270 | 698 | tk_nout++; |
89dc6dfb BJ |
699 | /* |
700 | * for upper-case-only terminals, | |
701 | * generate escapes. | |
702 | */ | |
703 | if (tp->t_flags&LCASE) { | |
704 | colp = "({)}!|^~'`"; | |
705 | while(*colp++) | |
706 | if(c == *colp++) { | |
707 | ttyoutput('\\', tp); | |
708 | c = colp[-2]; | |
709 | break; | |
710 | } | |
711 | if ('a'<=c && c<='z') | |
712 | c += 'A' - 'a'; | |
713 | } | |
714 | /* | |
715 | * turn <nl> to <cr><lf> if desired. | |
716 | */ | |
717 | if (c=='\n' && tp->t_flags&CRMOD) | |
718 | ttyoutput('\r', tp); | |
101ba270 | 719 | (void) putc(c, &tp->t_outq); |
89dc6dfb BJ |
720 | /* |
721 | * Calculate delays. | |
722 | * The numbers here represent clock ticks | |
723 | * and are not necessarily optimal for all terminals. | |
724 | * The delays are indicated by characters above 0200. | |
725 | * In raw mode there are no delays and the | |
726 | * transmission path is 8 bits wide. | |
727 | */ | |
728 | colp = &tp->t_col; | |
729 | ctype = partab[c]; | |
730 | c = 0; | |
731 | switch (ctype&077) { | |
732 | ||
733 | /* ordinary */ | |
734 | case 0: | |
735 | (*colp)++; | |
736 | ||
737 | /* non-printing */ | |
738 | case 1: | |
739 | break; | |
740 | ||
741 | /* backspace */ | |
742 | case 2: | |
743 | if (*colp) | |
744 | (*colp)--; | |
745 | break; | |
746 | ||
747 | /* newline */ | |
748 | case 3: | |
749 | ctype = (tp->t_flags >> 8) & 03; | |
750 | if(ctype == 1) { /* tty 37 */ | |
751 | if (*colp) | |
752 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); | |
753 | } else | |
754 | if(ctype == 2) { /* vt05 */ | |
755 | c = 6; | |
756 | } | |
757 | *colp = 0; | |
758 | break; | |
759 | ||
760 | /* tab */ | |
761 | case 4: | |
762 | ctype = (tp->t_flags >> 10) & 03; | |
763 | if(ctype == 1) { /* tty 37 */ | |
764 | c = 1 - (*colp | ~07); | |
765 | if(c < 5) | |
766 | c = 0; | |
767 | } | |
768 | *colp |= 07; | |
769 | (*colp)++; | |
770 | break; | |
771 | ||
772 | /* vertical motion */ | |
773 | case 5: | |
774 | if(tp->t_flags & VTDELAY) /* tty 37 */ | |
775 | c = 0177; | |
776 | break; | |
777 | ||
778 | /* carriage return */ | |
779 | case 6: | |
780 | ctype = (tp->t_flags >> 12) & 03; | |
781 | if(ctype == 1) { /* tn 300 */ | |
782 | c = 5; | |
783 | } else if(ctype == 2) { /* ti 700 */ | |
784 | c = 10; | |
785 | } else if(ctype == 3) { /* concept 100 */ | |
786 | int i; | |
787 | for (i= *colp; i<9; i++) | |
101ba270 | 788 | (void) putc(0177, &tp->t_outq); |
89dc6dfb BJ |
789 | } |
790 | *colp = 0; | |
791 | } | |
792 | if(c) | |
101ba270 | 793 | (void) putc(c|0200, &tp->t_outq); |
89dc6dfb BJ |
794 | } |
795 | ||
796 | /* | |
797 | * Restart typewriter output following a delay | |
798 | * timeout. | |
799 | * The name of the routine is passed to the timeout | |
800 | * subroutine and it is called during a clock interrupt. | |
801 | */ | |
802 | ttrstrt(tp) | |
803 | register struct tty *tp; | |
804 | { | |
805 | ||
806 | tp->t_state &= ~TIMEOUT; | |
807 | ttstart(tp); | |
808 | } | |
809 | ||
810 | /* | |
811 | * Start output on the typewriter. It is used from the top half | |
812 | * after some characters have been put on the output queue, | |
813 | * from the interrupt routine to transmit the next | |
814 | * character, and after a timeout has finished. | |
815 | */ | |
816 | ttstart(tp) | |
817 | register struct tty *tp; | |
818 | { | |
819 | register s; | |
820 | ||
821 | s = spl5(); | |
822 | if((tp->t_state&(TIMEOUT|TTSTOP|BUSY)) == 0) | |
823 | (*tp->t_oproc)(tp); | |
824 | splx(s); | |
825 | } | |
826 | ||
827 | /* | |
828 | * Called from device's read routine after it has | |
829 | * calculated the tty-structure given as argument. | |
830 | */ | |
831 | ttread(tp) | |
832 | register struct tty *tp; | |
833 | { | |
834 | register s; | |
835 | ||
836 | if ((tp->t_state&CARR_ON)==0) | |
837 | return(-1); | |
838 | s = spl5(); | |
839 | if (tp->t_canq.c_cc==0) | |
840 | while (canon(tp)<0) | |
841 | if (tp->t_chan==NULL) { | |
842 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
843 | } else { | |
844 | splx(s); | |
845 | return(0); | |
846 | } | |
847 | splx(s); | |
848 | while (tp->t_canq.c_cc && passc(getc(&tp->t_canq))>=0) | |
849 | ; | |
850 | return(tp->t_rawq.c_cc+tp->t_canq.c_cc); | |
851 | } | |
852 | ||
853 | /* | |
854 | * Called from the device's write routine after it has | |
855 | * calculated the tty-structure given as argument. | |
856 | */ | |
857 | caddr_t | |
858 | ttwrite(tp) | |
859 | register struct tty *tp; | |
860 | { | |
861 | /* | |
862 | * THE POSITIONING OF CP, CC, AND CE ARE CRITICAL | |
863 | * AND MUST NOT BE CHANGED WITHOUT PATCHING | |
864 | * THE 'ASM' INLINES BELOW. WATCH OUT. | |
865 | */ | |
866 | register char *cp; | |
867 | register int cc, ce; | |
868 | register i; | |
869 | char obuf[OBUFSIZ]; | |
870 | ||
871 | if ((tp->t_state&CARR_ON)==0) | |
872 | return(NULL); | |
873 | while (u.u_count) { | |
874 | cc = MIN(u.u_count, OBUFSIZ); | |
875 | cp = obuf; | |
876 | iomove(cp, (unsigned)cc, B_WRITE); | |
877 | if (u.u_error) | |
878 | break; | |
101ba270 | 879 | (void) spl5(); |
89dc6dfb BJ |
880 | while (tp->t_outq.c_cc > TTHIWAT) { |
881 | ttstart(tp); | |
882 | tp->t_state |= ASLEEP; | |
883 | if (tp->t_chan) { | |
884 | u.u_base -= cc; | |
885 | u.u_offset -= cc; | |
886 | u.u_count += cc; | |
101ba270 | 887 | (void) spl0(); |
89dc6dfb BJ |
888 | return((caddr_t)&tp->t_outq); |
889 | } | |
890 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
891 | } | |
101ba270 | 892 | (void) spl0(); |
89dc6dfb BJ |
893 | if (tp->t_flags&LCASE) { |
894 | while (cc--) | |
895 | ttyoutput(*cp++,tp); | |
896 | continue; | |
897 | } | |
898 | while (cc) { | |
899 | if (tp->t_flags&RAW) | |
900 | ce=cc; | |
901 | else { | |
902 | #ifdef VAX | |
903 | asm(" scanc r9,(r10),_partab,$077"); | |
904 | asm(" subl3 r0,r9,r8"); | |
905 | #else | |
906 | ce=0; | |
907 | while(((partab[*(cp+ce)]&077)==0)&&(ce<cc)) | |
908 | ce++; | |
909 | #endif | |
910 | if (ce==0) { | |
911 | ttyoutput(*cp++,tp); | |
912 | cc--; | |
101ba270 | 913 | goto check; |
89dc6dfb BJ |
914 | } |
915 | } | |
916 | i=b_to_q(cp,ce,&tp->t_outq); | |
917 | ce-=i; | |
918 | tk_nout+=ce; | |
919 | tp->t_col+=ce; | |
920 | cp+=ce; | |
921 | cc-=ce; | |
101ba270 BJ |
922 | check: |
923 | if (tp->t_outq.c_cc > TTHIWAT) { | |
924 | (void) spl5(); | |
89dc6dfb BJ |
925 | while (tp->t_outq.c_cc > TTHIWAT) { |
926 | ttstart(tp); | |
927 | tp->t_state |= ASLEEP; | |
928 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
929 | } | |
101ba270 | 930 | (void) spl0(); |
89dc6dfb BJ |
931 | } |
932 | } | |
933 | } | |
934 | ttstart(tp); | |
935 | return(NULL); | |
936 | } |