Commit | Line | Data |
---|---|---|
50450a20 | 1 | /* tty.c 3.15 %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; | |
250cd6a1 | 93 | tp->t_line = 0; /* conservative */ |
89dc6dfb BJ |
94 | } |
95 | ||
89dc6dfb BJ |
96 | /* |
97 | * set default control characters. | |
98 | */ | |
99 | ttychars(tp) | |
100 | register struct tty *tp; | |
101 | { | |
8062c8a7 | 102 | |
89dc6dfb BJ |
103 | tun.t_intrc = CINTR; |
104 | tun.t_quitc = CQUIT; | |
105 | tun.t_startc = CSTART; | |
106 | tun.t_stopc = CSTOP; | |
107 | tun.t_eofc = CEOT; | |
108 | tun.t_brkc = CBRK; | |
109 | tp->t_erase = CERASE; | |
110 | tp->t_kill = CKILL; | |
8062c8a7 | 111 | /* begin local */ |
6fdc0335 BJ |
112 | tlun.t_suspc = CTRL(z); |
113 | tlun.t_dsuspc = CTRL(y); | |
8062c8a7 BJ |
114 | tlun.t_rprntc = CTRL(r); |
115 | tlun.t_flushc = CTRL(o); | |
116 | tlun.t_werasc = CTRL(w); | |
117 | tlun.t_lnextc = CTRL(v); | |
118 | tlun.t_lintr = CTRL(c); | |
119 | tlun.t_lerase = CTRL(h); | |
120 | tlun.t_lkill = CTRL(u); | |
121 | tp->t_local = 0; | |
122 | tp->t_lstate = 0; | |
123 | /* end local */ | |
89dc6dfb BJ |
124 | } |
125 | ||
126 | /* | |
127 | * clean tp on last close | |
128 | */ | |
129 | ttyclose(tp) | |
130 | register struct tty *tp; | |
131 | { | |
132 | ||
133 | tp->t_pgrp = 0; | |
134 | wflushtty(tp); | |
135 | tp->t_state = 0; | |
250cd6a1 | 136 | tp->t_line = 0; |
89dc6dfb BJ |
137 | } |
138 | ||
139 | /* | |
140 | * stty/gtty writearound | |
141 | */ | |
142 | stty() | |
143 | { | |
144 | u.u_arg[2] = u.u_arg[1]; | |
145 | u.u_arg[1] = TIOCSETP; | |
146 | ioctl(); | |
147 | } | |
148 | ||
149 | gtty() | |
150 | { | |
151 | u.u_arg[2] = u.u_arg[1]; | |
152 | u.u_arg[1] = TIOCGETP; | |
153 | ioctl(); | |
154 | } | |
155 | ||
101ba270 BJ |
156 | /* |
157 | * Do nothing specific version of line | |
158 | * discipline specific ioctl command. | |
159 | */ | |
de857265 | 160 | /*ARGSUSED*/ |
101ba270 BJ |
161 | nullioctl(tp, cmd, addr) |
162 | register struct tty *tp; | |
163 | caddr_t addr; | |
164 | { | |
165 | ||
166 | return (cmd); | |
167 | } | |
168 | ||
89dc6dfb BJ |
169 | /* |
170 | * ioctl system call | |
171 | * Check legality, execute common code, and switch out to individual | |
172 | * device routine. | |
173 | */ | |
174 | ioctl() | |
175 | { | |
176 | register struct file *fp; | |
177 | register struct inode *ip; | |
178 | register struct a { | |
179 | int fdes; | |
180 | int cmd; | |
181 | caddr_t cmarg; | |
182 | } *uap; | |
183 | register dev_t dev; | |
184 | register fmt; | |
185 | ||
186 | uap = (struct a *)u.u_ap; | |
187 | if ((fp = getf(uap->fdes)) == NULL) | |
188 | return; | |
189 | if (uap->cmd==FIOCLEX) { | |
190 | u.u_pofile[uap->fdes] |= EXCLOSE; | |
191 | return; | |
192 | } | |
193 | if (uap->cmd==FIONCLEX) { | |
194 | u.u_pofile[uap->fdes] &= ~EXCLOSE; | |
195 | return; | |
196 | } | |
197 | ip = fp->f_inode; | |
198 | fmt = ip->i_mode & IFMT; | |
199 | if (fmt != IFCHR && fmt != IFMPC) { | |
8062c8a7 BJ |
200 | /* begin local */ |
201 | if (uap->cmd==FIONREAD && (fmt == IFREG || fmt == IFDIR)) { | |
202 | off_t nread = ip->i_size - fp->f_un.f_offset; | |
203 | ||
204 | if (copyout((caddr_t)&nread, uap->cmarg, sizeof(off_t))) | |
205 | u.u_error = EFAULT; | |
206 | } else | |
207 | /* end local */ | |
208 | u.u_error = ENOTTY; | |
89dc6dfb BJ |
209 | return; |
210 | } | |
211 | dev = ip->i_un.i_rdev; | |
212 | u.u_r.r_val1 = 0; | |
213 | (*cdevsw[major(dev)].d_ioctl)(dev, uap->cmd, uap->cmarg, fp->f_flag); | |
214 | } | |
215 | ||
216 | /* | |
217 | * Common code for several tty ioctl commands | |
218 | */ | |
219 | ttioccomm(com, tp, addr, dev) | |
220 | register struct tty *tp; | |
221 | caddr_t addr; | |
222 | { | |
223 | unsigned t; | |
8062c8a7 | 224 | struct sgttyb iocb; |
de857265 | 225 | struct clist tq; |
89dc6dfb | 226 | extern int nldisp; |
50450a20 | 227 | register c; |
da1392b6 | 228 | int temp; |
89dc6dfb BJ |
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: | |
07f8c7d2 | 342 | flushtty(tp, FREAD|FWRITE); |
89dc6dfb BJ |
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: | |
da1392b6 BJ |
406 | if (copyin(addr, (caddr_t)&tp->t_pgrp, sizeof (tp->t_pgrp))) |
407 | u.u_error = EFAULT; | |
8062c8a7 BJ |
408 | break; |
409 | ||
410 | case TIOCGPGRP: | |
411 | if (copyout((caddr_t)&tp->t_pgrp, addr, sizeof(tp->t_pgrp))) | |
412 | u.u_error = EFAULT; | |
413 | break; | |
414 | ||
415 | /* | |
416 | * Modify local mode word. | |
417 | */ | |
418 | case TIOCLBIS: | |
da1392b6 BJ |
419 | if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local))) |
420 | u.u_error = EFAULT; | |
421 | else | |
422 | tp->t_local |= temp; | |
8062c8a7 BJ |
423 | break; |
424 | ||
425 | case TIOCLBIC: | |
da1392b6 BJ |
426 | if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local))) |
427 | u.u_error = EFAULT; | |
428 | else | |
429 | tp->t_local &= ~temp; | |
8062c8a7 BJ |
430 | break; |
431 | ||
432 | case TIOCLSET: | |
da1392b6 BJ |
433 | if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local))) |
434 | u.u_error = EFAULT; | |
435 | else | |
436 | tp->t_local = temp; | |
8062c8a7 BJ |
437 | break; |
438 | ||
439 | case TIOCLGET: | |
440 | if (copyout((caddr_t)&tp->t_local, addr, sizeof(tp->t_local))) | |
89dc6dfb BJ |
441 | u.u_error = EFAULT; |
442 | break; | |
443 | ||
0dde1c43 BJ |
444 | case TIOCOUTQ: |
445 | if (copyout((caddr_t)&tp->t_outq.c_cc, addr, sizeof(tp->t_outq.c_cc))) | |
446 | u.u_error = EFAULT; | |
447 | break; | |
448 | ||
50450a20 BJ |
449 | case TIOCSTI: |
450 | c = fubyte(addr); | |
451 | if (u.u_uid && u.u_ttyp != tp || c < 0) | |
452 | u.u_error = EFAULT; | |
453 | else | |
454 | (*linesw[tp->t_line].l_rint)(c, tp); | |
455 | break; | |
8062c8a7 | 456 | /* end of locals */ |
50450a20 | 457 | |
89dc6dfb BJ |
458 | default: |
459 | return(0); | |
460 | } | |
461 | return(1); | |
462 | } | |
463 | ||
464 | /* | |
465 | * Wait for output to drain, then flush input waiting. | |
466 | */ | |
467 | wflushtty(tp) | |
468 | register struct tty *tp; | |
469 | { | |
470 | ||
101ba270 | 471 | (void) spl5(); |
89dc6dfb BJ |
472 | while (tp->t_outq.c_cc && tp->t_state&CARR_ON) { |
473 | (*tp->t_oproc)(tp); | |
474 | tp->t_state |= ASLEEP; | |
475 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
476 | } | |
07f8c7d2 | 477 | flushtty(tp, FREAD|FWRITE); |
101ba270 | 478 | (void) spl0(); |
89dc6dfb BJ |
479 | } |
480 | ||
481 | /* | |
482 | * flush all TTY queues | |
483 | */ | |
07f8c7d2 | 484 | flushtty(tp, rw) |
89dc6dfb BJ |
485 | register struct tty *tp; |
486 | { | |
487 | register s; | |
488 | ||
d1778415 BJ |
489 | if (tp->t_line == NETLDISC) |
490 | return; | |
101ba270 | 491 | s = spl6(); |
07f8c7d2 BJ |
492 | if (rw & FREAD) { |
493 | while (getc(&tp->t_canq) >= 0) | |
494 | ; | |
495 | wakeup((caddr_t)&tp->t_rawq); | |
496 | } | |
497 | if (rw & FWRITE) { | |
498 | wakeup((caddr_t)&tp->t_outq); | |
499 | tp->t_state &= ~TTSTOP; | |
500 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); | |
501 | while (getc(&tp->t_outq) >= 0) | |
502 | ; | |
503 | } | |
504 | if (rw & FREAD) { | |
505 | while (getc(&tp->t_rawq) >= 0) | |
506 | ; | |
507 | tp->t_delct = 0; | |
508 | tp->t_rocount = 0; /* local */ | |
509 | tp->t_rocol = 0; | |
510 | tp->t_lstate = 0; | |
511 | } | |
89dc6dfb BJ |
512 | splx(s); |
513 | } | |
514 | ||
515 | ||
516 | ||
517 | /* | |
518 | * transfer raw input list to canonical list, | |
519 | * doing erase-kill processing and handling escapes. | |
520 | * It waits until a full line has been typed in cooked mode, | |
521 | * or until any character has been typed in raw mode. | |
522 | */ | |
523 | canon(tp) | |
524 | register struct tty *tp; | |
525 | { | |
526 | register char *bp; | |
527 | char *bp1; | |
528 | register int c; | |
529 | int mc; | |
530 | int s; | |
531 | ||
532 | if ((tp->t_flags&(RAW|CBREAK))==0 && tp->t_delct==0 | |
533 | || (tp->t_flags&(RAW|CBREAK))!=0 && tp->t_rawq.c_cc==0) { | |
534 | return(-1); | |
535 | } | |
536 | s = spl0(); | |
537 | loop: | |
538 | bp = &canonb[2]; | |
539 | while ((c=getc(&tp->t_rawq)) >= 0) { | |
540 | if ((tp->t_flags&(RAW|CBREAK))==0) { | |
541 | if (c==0377) { | |
542 | tp->t_delct--; | |
543 | break; | |
544 | } | |
545 | if (bp[-1]!='\\') { | |
546 | if (c==tp->t_erase) { | |
547 | if (bp > &canonb[2]) | |
548 | bp--; | |
549 | continue; | |
550 | } | |
551 | if (c==tp->t_kill) | |
552 | goto loop; | |
553 | if (c==tun.t_eofc) | |
554 | continue; | |
555 | } else { | |
556 | mc = maptab[c]; | |
557 | if (c==tp->t_erase || c==tp->t_kill) | |
558 | mc = c; | |
559 | if (mc && (mc==c || (tp->t_flags&LCASE))) { | |
560 | if (bp[-2] != '\\') | |
561 | c = mc; | |
562 | bp--; | |
563 | } | |
564 | } | |
565 | } | |
566 | *bp++ = c; | |
567 | if (bp>=canonb+CANBSIZ) | |
568 | break; | |
569 | } | |
570 | bp1 = &canonb[2]; | |
101ba270 | 571 | (void) b_to_q(bp1, bp-bp1, &tp->t_canq); |
89dc6dfb BJ |
572 | |
573 | if (tp->t_state&TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { | |
574 | if (putc(tun.t_startc, &tp->t_outq)==0) { | |
575 | tp->t_state &= ~TBLOCK; | |
576 | ttstart(tp); | |
577 | } | |
578 | tp->t_char = 0; | |
579 | } | |
580 | ||
581 | splx(s); | |
582 | return(0); | |
583 | } | |
584 | ||
585 | ||
586 | /* | |
587 | * block transfer input handler. | |
588 | */ | |
589 | ttyrend(tp, pb, pe) | |
590 | register struct tty *tp; | |
591 | register char *pb, *pe; | |
592 | { | |
593 | int tandem; | |
594 | ||
595 | tandem = tp->t_flags&TANDEM; | |
596 | if (tp->t_flags&RAW) { | |
101ba270 | 597 | (void) b_to_q(pb, pe-pb, &tp->t_rawq); |
89dc6dfb | 598 | if (tp->t_chan) |
101ba270 | 599 | (void) sdata(tp->t_chan); else |
89dc6dfb BJ |
600 | wakeup((caddr_t)&tp->t_rawq); |
601 | } else { | |
602 | tp->t_flags &= ~TANDEM; | |
603 | while (pb < pe) | |
604 | ttyinput(*pb++, tp); | |
605 | tp->t_flags |= tandem; | |
606 | } | |
607 | if (tandem) | |
608 | ttyblock(tp); | |
609 | } | |
610 | ||
611 | /* | |
612 | * Place a character on raw TTY input queue, putting in delimiters | |
613 | * and waking up top half as needed. | |
614 | * Also echo if required. | |
615 | * The arguments are the character and the appropriate | |
616 | * tty structure. | |
617 | */ | |
618 | ttyinput(c, tp) | |
619 | register c; | |
620 | register struct tty *tp; | |
621 | { | |
622 | register int t_flags; | |
623 | register struct chan *cp; | |
624 | ||
625 | tk_nin += 1; | |
626 | c &= 0377; | |
627 | t_flags = tp->t_flags; | |
628 | if (t_flags&TANDEM) | |
629 | ttyblock(tp); | |
630 | if ((t_flags&RAW)==0) { | |
631 | c &= 0177; | |
632 | if (tp->t_state&TTSTOP) { | |
633 | if (c==tun.t_startc) { | |
634 | tp->t_state &= ~TTSTOP; | |
635 | ttstart(tp); | |
636 | return; | |
637 | } | |
638 | if (c==tun.t_stopc) | |
639 | return; | |
640 | tp->t_state &= ~TTSTOP; | |
641 | ttstart(tp); | |
642 | } else { | |
643 | if (c==tun.t_stopc) { | |
644 | tp->t_state |= TTSTOP; | |
645 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); | |
646 | return; | |
647 | } | |
648 | if (c==tun.t_startc) | |
649 | return; | |
650 | } | |
651 | if (c==tun.t_quitc || c==tun.t_intrc) { | |
07f8c7d2 | 652 | flushtty(tp, FREAD|FWRITE); |
89dc6dfb BJ |
653 | c = (c==tun.t_intrc) ? SIGINT:SIGQUIT; |
654 | if (tp->t_chan) | |
655 | scontrol(tp->t_chan, M_SIG, c); | |
656 | else | |
8062c8a7 | 657 | gsignal(tp->t_pgrp, c); |
89dc6dfb BJ |
658 | return; |
659 | } | |
660 | if (c=='\r' && t_flags&CRMOD) | |
661 | c = '\n'; | |
662 | } | |
663 | if (tp->t_rawq.c_cc>TTYHOG) { | |
07f8c7d2 | 664 | flushtty(tp, FREAD|FWRITE); |
89dc6dfb BJ |
665 | return; |
666 | } | |
667 | if (t_flags&LCASE && c>='A' && c<='Z') | |
668 | c += 'a'-'A'; | |
101ba270 | 669 | (void) putc(c, &tp->t_rawq); |
89dc6dfb BJ |
670 | if (t_flags&(RAW|CBREAK)||(c=='\n'||c==tun.t_eofc||c==tun.t_brkc)) { |
671 | if ((t_flags&(RAW|CBREAK))==0 && putc(0377, &tp->t_rawq)==0) | |
672 | tp->t_delct++; | |
673 | if ((cp=tp->t_chan)!=NULL) | |
101ba270 | 674 | (void) sdata(cp); else |
89dc6dfb BJ |
675 | wakeup((caddr_t)&tp->t_rawq); |
676 | } | |
677 | if (t_flags&ECHO) { | |
678 | ttyoutput(c, tp); | |
679 | if (c==tp->t_kill && (t_flags&(RAW|CBREAK))==0) | |
680 | ttyoutput('\n', tp); | |
681 | ttstart(tp); | |
682 | } | |
683 | } | |
684 | ||
685 | ||
686 | /* | |
687 | * Send stop character on input overflow. | |
688 | */ | |
689 | ttyblock(tp) | |
690 | register struct tty *tp; | |
691 | { | |
692 | register x; | |
693 | x = q1.c_cc + q2.c_cc; | |
694 | if (q1.c_cc > TTYHOG) { | |
07f8c7d2 | 695 | flushtty(tp, FREAD|FWRITE); |
89dc6dfb BJ |
696 | tp->t_state &= ~TBLOCK; |
697 | } | |
698 | if (x >= TTYHOG/2) { | |
699 | if (putc(tun.t_stopc, &tp->t_outq)==0) { | |
700 | tp->t_state |= TBLOCK; | |
701 | tp->t_char++; | |
702 | ttstart(tp); | |
703 | } | |
704 | } | |
705 | } | |
706 | ||
707 | /* | |
708 | * put character on TTY output queue, adding delays, | |
709 | * expanding tabs, and handling the CR/NL bit. | |
710 | * It is called both from the top half for output, and from | |
711 | * interrupt level for echoing. | |
712 | * The arguments are the character and the tty structure. | |
713 | */ | |
714 | ttyoutput(c, tp) | |
715 | register c; | |
716 | register struct tty *tp; | |
717 | { | |
718 | register char *colp; | |
719 | register ctype; | |
720 | ||
89dc6dfb BJ |
721 | /* |
722 | * Ignore EOT in normal mode to avoid hanging up | |
723 | * certain terminals. | |
724 | * In raw mode dump the char unchanged. | |
725 | */ | |
89dc6dfb BJ |
726 | if ((tp->t_flags&RAW)==0) { |
727 | c &= 0177; | |
728 | if ((tp->t_flags&CBREAK)==0 && c==CEOT) | |
729 | return; | |
730 | } else { | |
101ba270 BJ |
731 | tk_nout++; |
732 | (void) putc(c, &tp->t_outq); | |
89dc6dfb BJ |
733 | return; |
734 | } | |
735 | ||
736 | /* | |
737 | * Turn tabs to spaces as required | |
738 | */ | |
739 | if (c=='\t' && (tp->t_flags&TBDELAY)==XTABS) { | |
101ba270 BJ |
740 | c = 8 - (tp->t_col & 7); |
741 | (void) b_to_q(" ", c, &tp->t_outq); | |
742 | tp->t_col += c; | |
743 | tk_nout += c; | |
89dc6dfb BJ |
744 | return; |
745 | } | |
101ba270 | 746 | tk_nout++; |
89dc6dfb BJ |
747 | /* |
748 | * for upper-case-only terminals, | |
749 | * generate escapes. | |
750 | */ | |
751 | if (tp->t_flags&LCASE) { | |
752 | colp = "({)}!|^~'`"; | |
753 | while(*colp++) | |
754 | if(c == *colp++) { | |
755 | ttyoutput('\\', tp); | |
756 | c = colp[-2]; | |
757 | break; | |
758 | } | |
759 | if ('a'<=c && c<='z') | |
760 | c += 'A' - 'a'; | |
761 | } | |
762 | /* | |
763 | * turn <nl> to <cr><lf> if desired. | |
764 | */ | |
765 | if (c=='\n' && tp->t_flags&CRMOD) | |
766 | ttyoutput('\r', tp); | |
101ba270 | 767 | (void) putc(c, &tp->t_outq); |
89dc6dfb BJ |
768 | /* |
769 | * Calculate delays. | |
770 | * The numbers here represent clock ticks | |
771 | * and are not necessarily optimal for all terminals. | |
772 | * The delays are indicated by characters above 0200. | |
773 | * In raw mode there are no delays and the | |
774 | * transmission path is 8 bits wide. | |
775 | */ | |
776 | colp = &tp->t_col; | |
777 | ctype = partab[c]; | |
778 | c = 0; | |
779 | switch (ctype&077) { | |
780 | ||
781 | /* ordinary */ | |
782 | case 0: | |
783 | (*colp)++; | |
784 | ||
785 | /* non-printing */ | |
786 | case 1: | |
787 | break; | |
788 | ||
789 | /* backspace */ | |
790 | case 2: | |
791 | if (*colp) | |
792 | (*colp)--; | |
793 | break; | |
794 | ||
795 | /* newline */ | |
796 | case 3: | |
797 | ctype = (tp->t_flags >> 8) & 03; | |
798 | if(ctype == 1) { /* tty 37 */ | |
799 | if (*colp) | |
800 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); | |
801 | } else | |
802 | if(ctype == 2) { /* vt05 */ | |
803 | c = 6; | |
804 | } | |
805 | *colp = 0; | |
806 | break; | |
807 | ||
808 | /* tab */ | |
809 | case 4: | |
810 | ctype = (tp->t_flags >> 10) & 03; | |
811 | if(ctype == 1) { /* tty 37 */ | |
812 | c = 1 - (*colp | ~07); | |
813 | if(c < 5) | |
814 | c = 0; | |
815 | } | |
816 | *colp |= 07; | |
817 | (*colp)++; | |
818 | break; | |
819 | ||
820 | /* vertical motion */ | |
821 | case 5: | |
822 | if(tp->t_flags & VTDELAY) /* tty 37 */ | |
823 | c = 0177; | |
824 | break; | |
825 | ||
826 | /* carriage return */ | |
827 | case 6: | |
828 | ctype = (tp->t_flags >> 12) & 03; | |
829 | if(ctype == 1) { /* tn 300 */ | |
830 | c = 5; | |
831 | } else if(ctype == 2) { /* ti 700 */ | |
832 | c = 10; | |
833 | } else if(ctype == 3) { /* concept 100 */ | |
834 | int i; | |
6109e54e BJ |
835 | if ((i = *colp) >= 0) |
836 | for (; i<9; i++) | |
837 | (void) putc(0177, &tp->t_outq); | |
89dc6dfb BJ |
838 | } |
839 | *colp = 0; | |
840 | } | |
841 | if(c) | |
101ba270 | 842 | (void) putc(c|0200, &tp->t_outq); |
89dc6dfb BJ |
843 | } |
844 | ||
845 | /* | |
846 | * Restart typewriter output following a delay | |
847 | * timeout. | |
848 | * The name of the routine is passed to the timeout | |
849 | * subroutine and it is called during a clock interrupt. | |
850 | */ | |
851 | ttrstrt(tp) | |
852 | register struct tty *tp; | |
853 | { | |
854 | ||
855 | tp->t_state &= ~TIMEOUT; | |
856 | ttstart(tp); | |
857 | } | |
858 | ||
859 | /* | |
860 | * Start output on the typewriter. It is used from the top half | |
861 | * after some characters have been put on the output queue, | |
862 | * from the interrupt routine to transmit the next | |
863 | * character, and after a timeout has finished. | |
864 | */ | |
865 | ttstart(tp) | |
866 | register struct tty *tp; | |
867 | { | |
868 | register s; | |
869 | ||
870 | s = spl5(); | |
871 | if((tp->t_state&(TIMEOUT|TTSTOP|BUSY)) == 0) | |
872 | (*tp->t_oproc)(tp); | |
873 | splx(s); | |
874 | } | |
875 | ||
876 | /* | |
877 | * Called from device's read routine after it has | |
878 | * calculated the tty-structure given as argument. | |
879 | */ | |
880 | ttread(tp) | |
881 | register struct tty *tp; | |
882 | { | |
883 | register s; | |
884 | ||
885 | if ((tp->t_state&CARR_ON)==0) | |
886 | return(-1); | |
887 | s = spl5(); | |
888 | if (tp->t_canq.c_cc==0) | |
889 | while (canon(tp)<0) | |
890 | if (tp->t_chan==NULL) { | |
891 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
892 | } else { | |
893 | splx(s); | |
894 | return(0); | |
895 | } | |
896 | splx(s); | |
897 | while (tp->t_canq.c_cc && passc(getc(&tp->t_canq))>=0) | |
898 | ; | |
899 | return(tp->t_rawq.c_cc+tp->t_canq.c_cc); | |
900 | } | |
901 | ||
902 | /* | |
903 | * Called from the device's write routine after it has | |
904 | * calculated the tty-structure given as argument. | |
905 | */ | |
906 | caddr_t | |
907 | ttwrite(tp) | |
908 | register struct tty *tp; | |
909 | { | |
910 | /* | |
911 | * THE POSITIONING OF CP, CC, AND CE ARE CRITICAL | |
912 | * AND MUST NOT BE CHANGED WITHOUT PATCHING | |
913 | * THE 'ASM' INLINES BELOW. WATCH OUT. | |
914 | */ | |
915 | register char *cp; | |
916 | register int cc, ce; | |
917 | register i; | |
918 | char obuf[OBUFSIZ]; | |
919 | ||
920 | if ((tp->t_state&CARR_ON)==0) | |
921 | return(NULL); | |
922 | while (u.u_count) { | |
923 | cc = MIN(u.u_count, OBUFSIZ); | |
924 | cp = obuf; | |
925 | iomove(cp, (unsigned)cc, B_WRITE); | |
926 | if (u.u_error) | |
927 | break; | |
101ba270 | 928 | (void) spl5(); |
89dc6dfb BJ |
929 | while (tp->t_outq.c_cc > TTHIWAT) { |
930 | ttstart(tp); | |
931 | tp->t_state |= ASLEEP; | |
932 | if (tp->t_chan) { | |
933 | u.u_base -= cc; | |
934 | u.u_offset -= cc; | |
935 | u.u_count += cc; | |
101ba270 | 936 | (void) spl0(); |
89dc6dfb BJ |
937 | return((caddr_t)&tp->t_outq); |
938 | } | |
939 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
940 | } | |
101ba270 | 941 | (void) spl0(); |
89dc6dfb BJ |
942 | if (tp->t_flags&LCASE) { |
943 | while (cc--) | |
944 | ttyoutput(*cp++,tp); | |
945 | continue; | |
946 | } | |
947 | while (cc) { | |
948 | if (tp->t_flags&RAW) | |
949 | ce=cc; | |
950 | else { | |
951 | #ifdef VAX | |
952 | asm(" scanc r9,(r10),_partab,$077"); | |
953 | asm(" subl3 r0,r9,r8"); | |
954 | #else | |
955 | ce=0; | |
956 | while(((partab[*(cp+ce)]&077)==0)&&(ce<cc)) | |
957 | ce++; | |
958 | #endif | |
959 | if (ce==0) { | |
960 | ttyoutput(*cp++,tp); | |
961 | cc--; | |
101ba270 | 962 | goto check; |
89dc6dfb BJ |
963 | } |
964 | } | |
965 | i=b_to_q(cp,ce,&tp->t_outq); | |
966 | ce-=i; | |
967 | tk_nout+=ce; | |
968 | tp->t_col+=ce; | |
969 | cp+=ce; | |
970 | cc-=ce; | |
101ba270 BJ |
971 | check: |
972 | if (tp->t_outq.c_cc > TTHIWAT) { | |
973 | (void) spl5(); | |
89dc6dfb BJ |
974 | while (tp->t_outq.c_cc > TTHIWAT) { |
975 | ttstart(tp); | |
976 | tp->t_state |= ASLEEP; | |
977 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
978 | } | |
101ba270 | 979 | (void) spl0(); |
89dc6dfb BJ |
980 | } |
981 | } | |
982 | } | |
983 | ttstart(tp); | |
984 | return(NULL); | |
985 | } |