Commit | Line | Data |
---|---|---|
0cd33762 TL |
1 | # |
2 | /* | |
3 | * general TTY subroutines | |
4 | */ | |
5 | #include "../h/param.h" | |
6 | #include "../h/systm.h" | |
7 | #include "../h/dir.h" | |
8 | #include "../h/user.h" | |
9 | #include "../h/tty.h" | |
10 | #include "../h/proc.h" | |
11 | #include "../h/mx.h" | |
12 | #include "../h/inode.h" | |
13 | #include "../h/file.h" | |
14 | #include "../h/reg.h" | |
15 | #include "../h/conf.h" | |
16 | ||
17 | char partab[]; | |
18 | ||
19 | /* | |
20 | * Input mapping table-- if an entry is non-zero, when the | |
21 | * corresponding character is typed preceded by "\" the escape | |
22 | * sequence is replaced by the table value. Mostly used for | |
23 | * upper-case only terminals. | |
24 | */ | |
25 | char maptab[] = | |
26 | { | |
27 | 000,000,000,000,CEOT,00,000,000, | |
28 | 000,000,000,000,000,000,000,000, | |
29 | 000,000,000,000,000,000,000,000, | |
30 | 000,000,000,000,000,000,000,000, | |
31 | 000,'|',000,000,000,000,000,'`', | |
32 | '{','}',000,000,000,000,000,000, | |
33 | 000,000,000,000,000,000,000,000, | |
34 | 000,000,000,000,000,000,000,000, | |
35 | 000,000,000,000,000,000,000,000, | |
36 | 000,000,000,000,000,000,000,000, | |
37 | 000,000,000,000,000,000,000,000, | |
38 | 000,000,000,000,000,000,'~',000, | |
39 | 000,'A','B','C','D','E','F','G', | |
40 | 'H','I','J','K','L','M','N','O', | |
41 | 'P','Q','R','S','T','U','V','W', | |
42 | 'X','Y','Z',000,000,000,000,000, | |
43 | }; | |
44 | ||
45 | /* | |
46 | * routine called on first teletype open. | |
47 | * establishes a process group for distribution | |
48 | * of quits and interrupts from the tty. | |
49 | */ | |
50 | ttyopen(dev, tp) | |
51 | dev_t dev; | |
52 | register struct tty *tp; | |
53 | { | |
54 | register struct proc *pp; | |
55 | ||
56 | pp = u.u_procp; | |
57 | if(pp->p_pgrp == 0) { | |
58 | u.u_ttyp = tp; | |
59 | u.u_ttyd = dev; | |
60 | if (tp->t_pgrp==0) | |
61 | tp->t_pgrp = pp->p_pid; | |
62 | pp->p_pgrp = tp->t_pgrp; | |
63 | } | |
64 | tp->t_state &= ~WOPEN; | |
65 | tp->t_state |= ISOPEN; | |
66 | } | |
67 | ||
68 | /* | |
69 | * clean tp on last close | |
70 | */ | |
71 | ttyclose(tp) | |
72 | register struct tty *tp; | |
73 | { | |
74 | ||
75 | tp->t_pgrp = 0; | |
76 | wflushtty(tp); | |
77 | tp->t_state = 0; | |
78 | } | |
79 | ||
80 | /* | |
81 | * stty/gtty writearound | |
82 | */ | |
83 | stty() | |
84 | { | |
85 | u.u_arg[2] = u.u_arg[1]; | |
86 | u.u_arg[1] = TIOCSETP; | |
87 | ioctl(); | |
88 | } | |
89 | ||
90 | gtty() | |
91 | { | |
92 | u.u_arg[2] = u.u_arg[1]; | |
93 | u.u_arg[1] = TIOCGETP; | |
94 | ioctl(); | |
95 | } | |
96 | ||
97 | /* | |
98 | * ioctl system call | |
99 | * Check legality, execute common code, and switch out to individual | |
100 | * device routine. | |
101 | */ | |
102 | ioctl() | |
103 | { | |
104 | register struct file *fp; | |
105 | register struct inode *ip; | |
106 | register struct a { | |
107 | int fdes; | |
108 | int cmd; | |
109 | caddr_t cmarg; | |
110 | } *uap; | |
111 | register dev_t dev; | |
112 | register fmt; | |
113 | ||
114 | uap = (struct a *)u.u_ap; | |
115 | if ((fp = getf(uap->fdes)) == NULL) | |
116 | return; | |
117 | if (uap->cmd==FIOCLEX) { | |
118 | u.u_pofile[uap->fdes] |= EXCLOSE; | |
119 | return; | |
120 | } | |
121 | if (uap->cmd==FIONCLEX) { | |
122 | u.u_pofile[uap->fdes] &= ~EXCLOSE; | |
123 | return; | |
124 | } | |
125 | ip = fp->f_inode; | |
126 | fmt = ip->i_mode & IFMT; | |
127 | if (fmt != IFCHR && fmt != IFMPC) { | |
128 | u.u_error = ENOTTY; | |
129 | return; | |
130 | } | |
131 | dev = (dev_t)ip->i_un.i_rdev; | |
132 | (*cdevsw[major(dev)].d_ioctl)(dev, uap->cmd, uap->cmarg, fp->f_flag&(FREAD|FWRITE)); | |
133 | } | |
134 | ||
135 | /* | |
136 | * Common code for several tty ioctl commands | |
137 | */ | |
138 | ttioccomm(com, tp, addr, dev) | |
139 | register struct tty *tp; | |
140 | caddr_t addr; | |
141 | { | |
142 | unsigned t; | |
143 | struct ttiocb iocb; | |
144 | extern int nldisp; | |
145 | ||
146 | switch(com) { | |
147 | ||
148 | /* | |
149 | * get discipline number | |
150 | */ | |
151 | case TIOCGETD: | |
152 | t = tp->t_line; | |
153 | if (copyout((caddr_t)&t, addr, sizeof(t))) | |
154 | u.u_error = EFAULT; | |
155 | break; | |
156 | ||
157 | /* | |
158 | * set line discipline | |
159 | */ | |
160 | case TIOCSETD: | |
161 | if (copyin(addr, (caddr_t)&t, sizeof(t))) { | |
162 | u.u_error = EFAULT; | |
163 | break; | |
164 | } | |
165 | if (t >= nldisp) { | |
166 | u.u_error = ENXIO; | |
167 | break; | |
168 | } | |
169 | if (tp->t_line) | |
170 | (*linesw[tp->t_line].l_close)(tp); | |
171 | if (t) | |
172 | (*linesw[t].l_open)(dev, tp, addr); | |
173 | if (u.u_error==0) | |
174 | tp->t_line = t; | |
175 | break; | |
176 | ||
177 | /* | |
178 | * prevent more opens on channel | |
179 | */ | |
180 | case TIOCEXCL: | |
181 | tp->t_state |= XCLUDE; | |
182 | break; | |
183 | case TIOCNXCL: | |
184 | tp->t_state &= ~XCLUDE; | |
185 | break; | |
186 | ||
187 | /* | |
188 | * Set new parameters | |
189 | */ | |
190 | case TIOCSETP: | |
191 | wflushtty(tp); | |
192 | case TIOCSETN: | |
193 | if (copyin(addr, (caddr_t)&iocb, sizeof(iocb))) { | |
194 | u.u_error = EFAULT; | |
195 | return(1); | |
196 | } | |
197 | tp->t_ispeed = iocb.ioc_ispeed; | |
198 | tp->t_ospeed = iocb.ioc_ospeed; | |
199 | tp->t_erase = iocb.ioc_erase; | |
200 | tp->t_kill = iocb.ioc_kill; | |
201 | tp->t_flags = iocb.ioc_flags; | |
202 | break; | |
203 | ||
204 | /* | |
205 | * send current parameters to user | |
206 | */ | |
207 | case TIOCGETP: | |
208 | iocb.ioc_ispeed = tp->t_ispeed; | |
209 | iocb.ioc_ospeed = tp->t_ospeed; | |
210 | iocb.ioc_erase = tp->t_erase; | |
211 | iocb.ioc_kill = tp->t_kill; | |
212 | iocb.ioc_flags = tp->t_flags; | |
213 | if (copyout((caddr_t)&iocb, addr, sizeof(iocb))) | |
214 | u.u_error = EFAULT; | |
215 | break; | |
216 | ||
217 | /* | |
218 | * Hang up line on last close | |
219 | */ | |
220 | ||
221 | case TIOCHPCL: | |
222 | tp->t_state |= HUPCLS; | |
223 | break; | |
224 | ||
225 | /* | |
226 | * ioctl entries to line discipline | |
227 | */ | |
228 | case DIOCSETP: | |
229 | case DIOCGETP: | |
230 | (*linesw[tp->t_line].l_ioctl)(com, tp, addr); | |
231 | break; | |
232 | default: | |
233 | return(0); | |
234 | } | |
235 | return(1); | |
236 | } | |
237 | ||
238 | /* | |
239 | * Wait for output to drain, then flush input waiting. | |
240 | */ | |
241 | wflushtty(tp) | |
242 | register struct tty *tp; | |
243 | { | |
244 | ||
245 | spl5(); | |
246 | while (tp->t_outq.c_cc && tp->t_state&CARR_ON) { | |
247 | (*tp->t_oproc)(tp); | |
248 | tp->t_state |= ASLEEP; | |
249 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
250 | } | |
251 | flushtty(tp); | |
252 | spl0(); | |
253 | } | |
254 | ||
255 | /* | |
256 | * flush all TTY queues | |
257 | */ | |
258 | flushtty(tp) | |
259 | register struct tty *tp; | |
260 | { | |
261 | register s; | |
262 | ||
263 | while (getc(&tp->t_canq) >= 0) | |
264 | ; | |
265 | while (getc(&tp->t_outq) >= 0) | |
266 | ; | |
267 | wakeup((caddr_t)&tp->t_rawq); | |
268 | wakeup((caddr_t)&tp->t_outq); | |
269 | s = spl5(); | |
270 | while (getc(&tp->t_rawq) >= 0) | |
271 | ; | |
272 | tp->t_delct = 0; | |
273 | splx(s); | |
274 | } | |
275 | ||
276 | /* | |
277 | * transfer raw input list to canonical list, | |
278 | * doing erase-kill processing and handling escapes. | |
279 | * It waits until a full line has been typed in cooked mode, | |
280 | * or until any character has been typed in raw mode. | |
281 | */ | |
282 | canon(tp) | |
283 | register struct tty *tp; | |
284 | { | |
285 | register char *bp; | |
286 | char *bp1; | |
287 | register int c; | |
288 | int mc; | |
289 | ||
290 | spl5(); | |
291 | while ((tp->t_flags&(RAW|CBREAK))==0 && tp->t_delct==0 | |
292 | || (tp->t_flags&(RAW|CBREAK))!=0 && tp->t_rawq.c_cc==0) { | |
293 | if ((tp->t_state&CARR_ON)==0) | |
294 | return(0); | |
295 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
296 | } | |
297 | spl0(); | |
298 | loop: | |
299 | bp = &canonb[2]; | |
300 | while ((c=getc(&tp->t_rawq)) >= 0) { | |
301 | if ((tp->t_flags&(RAW|CBREAK))==0) { | |
302 | if (c==0377) { | |
303 | tp->t_delct--; | |
304 | break; | |
305 | } | |
306 | if (bp[-1]!='\\') { | |
307 | if (c==tp->t_erase) { | |
308 | if (bp > &canonb[2]) | |
309 | bp--; | |
310 | continue; | |
311 | } | |
312 | if (c==tp->t_kill) | |
313 | goto loop; | |
314 | if (c==CEOT) | |
315 | continue; | |
316 | } else { | |
317 | mc = maptab[c]; | |
318 | if (c==tp->t_erase || c==tp->t_kill) | |
319 | mc = c; | |
320 | if (mc && (mc==c || (tp->t_flags&LCASE))) { | |
321 | if (bp[-2] != '\\') | |
322 | c = mc; | |
323 | bp--; | |
324 | } | |
325 | } | |
326 | } | |
327 | *bp++ = c; | |
328 | if (bp>=canonb+CANBSIZ) | |
329 | break; | |
330 | } | |
331 | bp1 = bp; | |
332 | bp = &canonb[2]; | |
333 | while (bp<bp1) | |
334 | putc(*bp++, &tp->t_canq); | |
335 | return(bp1 - &canonb[2]); | |
336 | } | |
337 | ||
338 | /* | |
339 | * Place a character on raw TTY input queue, putting in delimiters | |
340 | * and waking up top half as needed. | |
341 | * Also echo if required. | |
342 | * The arguments are the character and the appropriate | |
343 | * tty structure. | |
344 | */ | |
345 | ttyinput(c, tp) | |
346 | register c; | |
347 | register struct tty *tp; | |
348 | { | |
349 | register int t_flags; | |
350 | register struct chan *cp; | |
351 | ||
352 | tk_nin += 1; | |
353 | c &= 0377; | |
354 | t_flags = tp->t_flags; | |
355 | if ((t_flags&RAW)==0) { | |
356 | c &= 0177; | |
357 | if (c==CSTOP) { | |
358 | tp->t_state ^= TTSTOP; | |
359 | ttstart(tp); | |
360 | return; | |
361 | } | |
362 | tp->t_state &= ~TTSTOP; | |
363 | if (c==CQUIT || c==CINTR) { | |
364 | signal(tp->t_pgrp, c==CINTR? SIGINT:SIGQUIT); | |
365 | flushtty(tp); | |
366 | return; | |
367 | } | |
368 | if (c=='\r' && t_flags&CRMOD) | |
369 | c = '\n'; | |
370 | } | |
371 | if (tp->t_rawq.c_cc>TTYHOG) { | |
372 | flushtty(tp); | |
373 | return; | |
374 | } | |
375 | if (t_flags&LCASE && c>='A' && c<='Z') | |
376 | c += 'a'-'A'; | |
377 | putc(c, &tp->t_rawq); | |
378 | if (t_flags&(RAW|CBREAK) || (c=='\n' || c==CEOT)) { | |
379 | if ((t_flags&(RAW|CBREAK))==0 && putc(0377, &tp->t_rawq)==0) | |
380 | tp->t_delct++; | |
381 | if (cp = tp->t_chan) | |
382 | sdata(cp); | |
383 | else | |
384 | wakeup((caddr_t)&tp->t_rawq); | |
385 | } | |
386 | if (t_flags&ECHO) { | |
387 | ttyoutput(c, tp); | |
388 | if (c==tp->t_kill && (t_flags&(RAW|CBREAK))==0) | |
389 | ttyoutput('\n', tp); | |
390 | ttstart(tp); | |
391 | } | |
392 | } | |
393 | ||
394 | /* | |
395 | * put character on TTY output queue, adding delays, | |
396 | * expanding tabs, and handling the CR/NL bit. | |
397 | * It is called both from the top half for output, and from | |
398 | * interrupt level for echoing. | |
399 | * The arguments are the character and the tty structure. | |
400 | */ | |
401 | ttyoutput(c, tp) | |
402 | register c; | |
403 | register struct tty *tp; | |
404 | { | |
405 | register char *colp; | |
406 | register ctype; | |
407 | ||
408 | tk_nout += 1; | |
409 | /* | |
410 | * Ignore EOT in normal mode to avoid hanging up | |
411 | * certain terminals. | |
412 | * In raw mode dump the char unchanged. | |
413 | */ | |
414 | ||
415 | if ((tp->t_flags&RAW)==0) { | |
416 | c &= 0177; | |
417 | if (c==CEOT) | |
418 | return; | |
419 | } else { | |
420 | putc(c, &tp->t_outq); | |
421 | return; | |
422 | } | |
423 | /* | |
424 | * Turn tabs to spaces as required | |
425 | */ | |
426 | if (c=='\t' && (tp->t_flags&TBDELAY)==XTABS) { | |
427 | c = 8; | |
428 | do | |
429 | ttyoutput(' ', tp); | |
430 | while (--c >= 0 && tp->t_col&07); | |
431 | return; | |
432 | } | |
433 | /* | |
434 | * for upper-case-only terminals, | |
435 | * generate escapes. | |
436 | */ | |
437 | if (tp->t_flags&LCASE) { | |
438 | colp = "({)}!|^~'`"; | |
439 | while(*colp++) | |
440 | if(c == *colp++) { | |
441 | ttyoutput('\\', tp); | |
442 | c = colp[-2]; | |
443 | break; | |
444 | } | |
445 | if ('a'<=c && c<='z') | |
446 | c += 'A' - 'a'; | |
447 | } | |
448 | /* | |
449 | * turn <nl> to <cr><lf> if desired. | |
450 | */ | |
451 | if (c=='\n' && tp->t_flags&CRMOD) | |
452 | ttyoutput('\r', tp); | |
453 | putc(c, &tp->t_outq); | |
454 | /* | |
455 | * Calculate delays. | |
456 | * The numbers here represent clock ticks | |
457 | * and are not necessarily optimal for all terminals. | |
458 | * The delays are indicated by characters above 0200. | |
459 | * In raw mode there are no delays and the | |
460 | * transmission path is 8 bits wide. | |
461 | */ | |
462 | colp = &tp->t_col; | |
463 | ctype = partab[c]; | |
464 | c = 0; | |
465 | switch (ctype&077) { | |
466 | ||
467 | /* ordinary */ | |
468 | case 0: | |
469 | (*colp)++; | |
470 | ||
471 | /* non-printing */ | |
472 | case 1: | |
473 | break; | |
474 | ||
475 | /* backspace */ | |
476 | case 2: | |
477 | if (*colp) | |
478 | (*colp)--; | |
479 | break; | |
480 | ||
481 | /* newline */ | |
482 | case 3: | |
483 | ctype = (tp->t_flags >> 8) & 03; | |
484 | if(ctype == 1) { /* tty 37 */ | |
485 | if (*colp) | |
486 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); | |
487 | } else | |
488 | if(ctype == 2) { /* vt05 */ | |
489 | c = 6; | |
490 | } | |
491 | *colp = 0; | |
492 | break; | |
493 | ||
494 | /* tab */ | |
495 | case 4: | |
496 | ctype = (tp->t_flags >> 10) & 03; | |
497 | if(ctype == 1) { /* tty 37 */ | |
498 | c = 1 - (*colp | ~07); | |
499 | if(c < 5) | |
500 | c = 0; | |
501 | } | |
502 | *colp |= 07; | |
503 | (*colp)++; | |
504 | break; | |
505 | ||
506 | /* vertical motion */ | |
507 | case 5: | |
508 | if(tp->t_flags & VTDELAY) /* tty 37 */ | |
509 | c = 0177; | |
510 | break; | |
511 | ||
512 | /* carriage return */ | |
513 | case 6: | |
514 | ctype = (tp->t_flags >> 12) & 03; | |
515 | if(ctype == 1) { /* tn 300 */ | |
516 | c = 5; | |
517 | } else if(ctype == 2) { /* ti 700 */ | |
518 | c = 10; | |
519 | } | |
520 | *colp = 0; | |
521 | } | |
522 | if(c) | |
523 | putc(c|0200, &tp->t_outq); | |
524 | } | |
525 | ||
526 | /* | |
527 | * Restart typewriter output following a delay | |
528 | * timeout. | |
529 | * The name of the routine is passed to the timeout | |
530 | * subroutine and it is called during a clock interrupt. | |
531 | */ | |
532 | ttrstrt(tp) | |
533 | register struct tty *tp; | |
534 | { | |
535 | ||
536 | tp->t_state &= ~TIMEOUT; | |
537 | ttstart(tp); | |
538 | } | |
539 | ||
540 | /* | |
541 | * Start output on the typewriter. It is used from the top half | |
542 | * after some characters have been put on the output queue, | |
543 | * from the interrupt routine to transmit the next | |
544 | * character, and after a timeout has finished. | |
545 | */ | |
546 | ttstart(tp) | |
547 | register struct tty *tp; | |
548 | { | |
549 | register s; | |
550 | ||
551 | s = spl5(); | |
552 | if((tp->t_state&(TIMEOUT|TTSTOP|BUSY)) == 0) | |
553 | (*tp->t_oproc)(tp); | |
554 | splx(s); | |
555 | } | |
556 | ||
557 | /* | |
558 | * Called from device's read routine after it has | |
559 | * calculated the tty-structure given as argument. | |
560 | */ | |
561 | ttread(tp) | |
562 | register struct tty *tp; | |
563 | { | |
564 | struct chan *chan; | |
565 | ||
566 | if ((tp->t_state&CARR_ON)==0) | |
567 | return; | |
568 | chan = tp->t_chan; | |
569 | tp->t_chan = NULL; | |
570 | if (tp->t_canq.c_cc || canon(tp)) | |
571 | while (tp->t_canq.c_cc && passc(getc(&tp->t_canq))>=0) | |
572 | ; | |
573 | tp->t_chan = chan; | |
574 | } | |
575 | ||
576 | /* | |
577 | * Called from the device's write routine after it has | |
578 | * calculated the tty-structure given as argument. | |
579 | */ | |
580 | ttwrite(tp) | |
581 | register struct tty *tp; | |
582 | { | |
583 | register c; | |
584 | ||
585 | if ((tp->t_state&CARR_ON)==0) | |
586 | return; | |
587 | while ((c=cpass())>=0) { | |
588 | spl5(); | |
589 | while (tp->t_outq.c_cc > TTHIWAT) { | |
590 | ttstart(tp); | |
591 | tp->t_state |= ASLEEP; | |
592 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
593 | } | |
594 | spl0(); | |
595 | ttyoutput(c, tp); | |
596 | } | |
597 | ttstart(tp); | |
598 | } |