Commit | Line | Data |
---|---|---|
0cbf0d70 | 1 | /* tty.c 4.3 %G% */ |
89dc6dfb BJ |
2 | |
3 | /* | |
50e2732b | 4 | * TTY subroutines common to more than one line discipline |
89dc6dfb BJ |
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 | ||
0d65848d BJ |
60 | short tthiwat[16] = |
61 | { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,650,650 }; | |
62 | short ttlowat[16] = | |
63 | { 30, 30, 30, 30, 30, 30, 30, 50, 50,120,120,120,125,125,125,125 }; | |
64 | ||
89dc6dfb BJ |
65 | #define OBUFSIZ 100 |
66 | ||
89dc6dfb BJ |
67 | /* |
68 | * set default control characters. | |
69 | */ | |
70 | ttychars(tp) | |
71 | register struct tty *tp; | |
72 | { | |
8062c8a7 | 73 | |
89dc6dfb BJ |
74 | tun.t_intrc = CINTR; |
75 | tun.t_quitc = CQUIT; | |
76 | tun.t_startc = CSTART; | |
77 | tun.t_stopc = CSTOP; | |
78 | tun.t_eofc = CEOT; | |
79 | tun.t_brkc = CBRK; | |
80 | tp->t_erase = CERASE; | |
81 | tp->t_kill = CKILL; | |
8062c8a7 | 82 | /* begin local */ |
6fdc0335 BJ |
83 | tlun.t_suspc = CTRL(z); |
84 | tlun.t_dsuspc = CTRL(y); | |
8062c8a7 BJ |
85 | tlun.t_rprntc = CTRL(r); |
86 | tlun.t_flushc = CTRL(o); | |
87 | tlun.t_werasc = CTRL(w); | |
88 | tlun.t_lnextc = CTRL(v); | |
8062c8a7 BJ |
89 | tp->t_local = 0; |
90 | tp->t_lstate = 0; | |
91 | /* end local */ | |
89dc6dfb BJ |
92 | } |
93 | ||
94 | /* | |
50e2732b | 95 | * Wait for output to drain, then flush input waiting. |
89dc6dfb | 96 | */ |
50e2732b | 97 | wflushtty(tp) |
89dc6dfb BJ |
98 | register struct tty *tp; |
99 | { | |
100 | ||
50e2732b BJ |
101 | (void) spl5(); |
102 | while (tp->t_outq.c_cc && tp->t_state&CARR_ON) { | |
103 | (*tp->t_oproc)(tp); | |
104 | tp->t_state |= ASLEEP; | |
105 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
106 | } | |
107 | flushtty(tp, FREAD|FWRITE); | |
108 | (void) spl0(); | |
89dc6dfb BJ |
109 | } |
110 | ||
111 | /* | |
50e2732b | 112 | * flush all TTY queues |
89dc6dfb | 113 | */ |
50e2732b BJ |
114 | flushtty(tp, rw) |
115 | register struct tty *tp; | |
89dc6dfb | 116 | { |
50e2732b BJ |
117 | register s; |
118 | ||
119 | if (tp->t_line == NETLDISC) | |
120 | return; | |
121 | s = spl6(); | |
122 | if (rw & FREAD) { | |
123 | while (getc(&tp->t_canq) >= 0) | |
124 | ; | |
125 | wakeup((caddr_t)&tp->t_rawq); | |
126 | } | |
127 | if (rw & FWRITE) { | |
128 | wakeup((caddr_t)&tp->t_outq); | |
129 | tp->t_state &= ~TTSTOP; | |
130 | (*cdevsw[major(tp->t_dev)].d_stop)(tp); | |
131 | while (getc(&tp->t_outq) >= 0) | |
132 | ; | |
133 | } | |
134 | if (rw & FREAD) { | |
135 | while (getc(&tp->t_rawq) >= 0) | |
136 | ; | |
137 | tp->t_delct = 0; | |
138 | tp->t_rocount = 0; /* local */ | |
139 | tp->t_rocol = 0; | |
140 | tp->t_lstate = 0; | |
141 | } | |
142 | splx(s); | |
89dc6dfb BJ |
143 | } |
144 | ||
50e2732b BJ |
145 | /* |
146 | * Send stop character on input overflow. | |
147 | */ | |
148 | ttyblock(tp) | |
149 | register struct tty *tp; | |
89dc6dfb | 150 | { |
50e2732b BJ |
151 | register x; |
152 | x = tp->t_rawq.c_cc + tp->t_canq.c_cc; | |
153 | if (tp->t_rawq.c_cc > TTYHOG) { | |
154 | flushtty(tp, FREAD|FWRITE); | |
155 | tp->t_state &= ~TBLOCK; | |
156 | } | |
157 | if (x >= TTYHOG/2) { | |
158 | if (putc(tun.t_stopc, &tp->t_outq)==0) { | |
159 | tp->t_state |= TBLOCK; | |
160 | tp->t_char++; | |
161 | ttstart(tp); | |
162 | } | |
163 | } | |
89dc6dfb BJ |
164 | } |
165 | ||
101ba270 | 166 | /* |
50e2732b BJ |
167 | * Restart typewriter output following a delay |
168 | * timeout. | |
169 | * The name of the routine is passed to the timeout | |
170 | * subroutine and it is called during a clock interrupt. | |
101ba270 | 171 | */ |
50e2732b | 172 | ttrstrt(tp) |
101ba270 | 173 | register struct tty *tp; |
101ba270 BJ |
174 | { |
175 | ||
50e2732b BJ |
176 | tp->t_state &= ~TIMEOUT; |
177 | ttstart(tp); | |
101ba270 BJ |
178 | } |
179 | ||
89dc6dfb | 180 | /* |
50e2732b BJ |
181 | * Start output on the typewriter. It is used from the top half |
182 | * after some characters have been put on the output queue, | |
183 | * from the interrupt routine to transmit the next | |
184 | * character, and after a timeout has finished. | |
89dc6dfb | 185 | */ |
50e2732b BJ |
186 | ttstart(tp) |
187 | register struct tty *tp; | |
89dc6dfb | 188 | { |
50e2732b | 189 | register s; |
8062c8a7 | 190 | |
50e2732b BJ |
191 | s = spl5(); |
192 | if((tp->t_state&(TIMEOUT|TTSTOP|BUSY)) == 0) | |
193 | (*tp->t_oproc)(tp); | |
194 | splx(s); | |
89dc6dfb BJ |
195 | } |
196 | ||
197 | /* | |
50e2732b | 198 | * Common code for tty ioctls. |
89dc6dfb | 199 | */ |
49c84d3f | 200 | /*ARGSUSED*/ |
0cbf0d70 | 201 | ttioctl(tp, com, addr, flag) |
89dc6dfb BJ |
202 | register struct tty *tp; |
203 | caddr_t addr; | |
204 | { | |
0cbf0d70 | 205 | int dev; |
89dc6dfb | 206 | unsigned t; |
8062c8a7 | 207 | struct sgttyb iocb; |
de857265 | 208 | struct clist tq; |
89dc6dfb | 209 | extern int nldisp; |
50450a20 | 210 | register c; |
da1392b6 | 211 | int temp; |
89dc6dfb | 212 | |
c6fe3a50 BJ |
213 | /* |
214 | * This is especially so that isatty() will | |
215 | * fail when carrier is gone. | |
216 | */ | |
217 | if ((tp->t_state&CARR_ON) == 0) { | |
218 | u.u_error = EBADF; | |
219 | return (1); | |
220 | } | |
221 | ||
0cbf0d70 | 222 | dev = tp->t_dev; |
50e2732b BJ |
223 | /* |
224 | * If the ioctl involves modification, | |
225 | * insist on being able to write the device, | |
226 | * and hang if in the background. | |
227 | */ | |
228 | switch(com) { | |
229 | ||
c6fe3a50 BJ |
230 | case TIOCSETD: |
231 | case TIOCSETP: | |
232 | case TIOCSETN: | |
50e2732b BJ |
233 | case TIOCFLUSH: |
234 | case TIOCSETC: | |
235 | case TIOCSLTC: | |
236 | case TIOCSPGRP: | |
237 | case TIOCLBIS: | |
238 | case TIOCLBIC: | |
239 | case TIOCLSET: | |
240 | case TIOCSTI: | |
c6fe3a50 | 241 | /* this is reasonable, but impractical... |
50e2732b BJ |
242 | if ((flag & FWRITE) == 0) { |
243 | u.u_error = EBADF; | |
244 | return (1); | |
245 | } | |
c6fe3a50 | 246 | */ |
50e2732b BJ |
247 | while (tp->t_line == NTTYDISC && |
248 | u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && | |
249 | (u.u_procp->p_flag&SVFORK) == 0 && | |
250 | u.u_signal[SIGTTOU] != SIG_IGN && | |
251 | u.u_signal[SIGTTOU] != SIG_HOLD && | |
252 | (u.u_procp->p_flag&SDETACH)==0) { | |
253 | gsignal(u.u_procp->p_pgrp, SIGTTOU); | |
254 | sleep((caddr_t)&lbolt, TTOPRI); | |
255 | } | |
256 | break; | |
257 | } | |
258 | ||
259 | /* | |
260 | * Process the ioctl. | |
261 | */ | |
89dc6dfb BJ |
262 | switch(com) { |
263 | ||
264 | /* | |
50e2732b | 265 | * Get discipline number |
89dc6dfb BJ |
266 | */ |
267 | case TIOCGETD: | |
268 | t = tp->t_line; | |
269 | if (copyout((caddr_t)&t, addr, sizeof(t))) | |
270 | u.u_error = EFAULT; | |
271 | break; | |
272 | ||
273 | /* | |
50e2732b | 274 | * Set line discipline |
89dc6dfb BJ |
275 | */ |
276 | case TIOCSETD: | |
277 | if (copyin(addr, (caddr_t)&t, sizeof(t))) { | |
278 | u.u_error = EFAULT; | |
279 | break; | |
280 | } | |
281 | if (t >= nldisp) { | |
282 | u.u_error = ENXIO; | |
283 | break; | |
284 | } | |
8062c8a7 | 285 | (void) spl5(); |
89dc6dfb BJ |
286 | if (tp->t_line) |
287 | (*linesw[tp->t_line].l_close)(tp); | |
288 | if (t) | |
289 | (*linesw[t].l_open)(dev, tp, addr); | |
290 | if (u.u_error==0) | |
291 | tp->t_line = t; | |
8062c8a7 | 292 | (void) spl0(); |
89dc6dfb BJ |
293 | break; |
294 | ||
295 | /* | |
50e2732b | 296 | * Prevent more opens on channel |
89dc6dfb BJ |
297 | */ |
298 | case TIOCEXCL: | |
299 | tp->t_state |= XCLUDE; | |
300 | break; | |
301 | ||
302 | case TIOCNXCL: | |
303 | tp->t_state &= ~XCLUDE; | |
304 | break; | |
305 | ||
306 | /* | |
307 | * Set new parameters | |
308 | */ | |
309 | case TIOCSETP: | |
de857265 | 310 | case TIOCSETN: |
89dc6dfb BJ |
311 | if (copyin(addr, (caddr_t)&iocb, sizeof(iocb))) { |
312 | u.u_error = EFAULT; | |
313 | return(1); | |
314 | } | |
101ba270 | 315 | (void) spl5(); |
8062c8a7 BJ |
316 | if (tp->t_line == 0) { |
317 | if (com == TIOCSETP) | |
318 | wflushtty(tp); | |
319 | while (canon(tp)>=0) | |
320 | ; | |
e7c0dc62 BJ |
321 | #ifdef notdef |
322 | wakeup((caddr_t)&tp->t_rawq); | |
323 | #endif | |
8062c8a7 BJ |
324 | } else if (tp->t_line == NTTYDISC) { |
325 | if (tp->t_flags&RAW || iocb.sg_flags&RAW || | |
326 | com == TIOCSETP) | |
327 | wflushtty(tp); | |
328 | else if ((tp->t_flags&CBREAK) != (iocb.sg_flags&CBREAK)) { | |
329 | if (iocb.sg_flags & CBREAK) { | |
330 | catq(&tp->t_rawq, &tp->t_canq); | |
331 | tq = tp->t_rawq; | |
332 | tp->t_rawq = tp->t_canq; | |
333 | tp->t_canq = tq; | |
334 | } else { | |
335 | tp->t_local |= LPENDIN; | |
336 | if (tp->t_canq.c_cc) | |
337 | panic("ioccom canq"); | |
e7c0dc62 | 338 | #ifdef notdef |
8062c8a7 BJ |
339 | if (tp->t_chan) |
340 | (void) sdata(tp->t_chan); | |
341 | else | |
e7c0dc62 | 342 | #endif |
8062c8a7 BJ |
343 | wakeup((caddr_t)&tp->t_rawq); |
344 | } | |
345 | } | |
346 | } | |
89dc6dfb | 347 | if ((tp->t_state&SPEEDS)==0) { |
8062c8a7 BJ |
348 | tp->t_ispeed = iocb.sg_ispeed; |
349 | tp->t_ospeed = iocb.sg_ospeed; | |
89dc6dfb | 350 | } |
8062c8a7 BJ |
351 | tp->t_erase = iocb.sg_erase; |
352 | tp->t_kill = iocb.sg_kill; | |
353 | tp->t_flags = iocb.sg_flags; | |
101ba270 | 354 | (void) spl0(); |
89dc6dfb BJ |
355 | break; |
356 | ||
357 | /* | |
50e2732b | 358 | * Send current parameters to user |
89dc6dfb BJ |
359 | */ |
360 | case TIOCGETP: | |
8062c8a7 BJ |
361 | iocb.sg_ispeed = tp->t_ispeed; |
362 | iocb.sg_ospeed = tp->t_ospeed; | |
363 | iocb.sg_erase = tp->t_erase; | |
364 | iocb.sg_kill = tp->t_kill; | |
365 | iocb.sg_flags = tp->t_flags; | |
89dc6dfb BJ |
366 | if (copyout((caddr_t)&iocb, addr, sizeof(iocb))) |
367 | u.u_error = EFAULT; | |
368 | break; | |
369 | ||
370 | /* | |
371 | * Hang up line on last close | |
372 | */ | |
89dc6dfb BJ |
373 | case TIOCHPCL: |
374 | tp->t_state |= HUPCLS; | |
375 | break; | |
376 | ||
377 | case TIOCFLUSH: | |
07f8c7d2 | 378 | flushtty(tp, FREAD|FWRITE); |
89dc6dfb BJ |
379 | break; |
380 | ||
89dc6dfb | 381 | /* |
50e2732b | 382 | * Set and fetch special characters |
89dc6dfb BJ |
383 | */ |
384 | case TIOCSETC: | |
8062c8a7 | 385 | if (copyin(addr, (caddr_t)&tun, sizeof(struct tchars))) |
89dc6dfb BJ |
386 | u.u_error = EFAULT; |
387 | break; | |
388 | ||
389 | case TIOCGETC: | |
8062c8a7 BJ |
390 | if (copyout((caddr_t)&tun, addr, sizeof(struct tchars))) |
391 | u.u_error = EFAULT; | |
392 | break; | |
393 | ||
394 | /* local ioctls */ | |
50e2732b BJ |
395 | /* |
396 | * Set/get local special characters. | |
397 | */ | |
8062c8a7 BJ |
398 | case TIOCSLTC: |
399 | if (copyin(addr, (caddr_t)&tlun, sizeof (struct ltchars))) | |
400 | u.u_error = EFAULT; | |
401 | break; | |
402 | ||
403 | case TIOCGLTC: | |
404 | if (copyout((caddr_t)&tlun, addr, sizeof (struct ltchars))) | |
405 | u.u_error = EFAULT; | |
406 | break; | |
407 | ||
50e2732b BJ |
408 | /* |
409 | * Return number of characters immediately available. | |
410 | */ | |
8062c8a7 | 411 | case FIONREAD: { |
d1778415 | 412 | off_t nread; |
8062c8a7 | 413 | |
d1778415 BJ |
414 | switch (tp->t_line) { |
415 | ||
416 | case NETLDISC: | |
417 | nread = tp->t_rec ? tp->t_inbuf : 0; | |
418 | break; | |
419 | ||
6d27b2c6 BJ |
420 | case 0: |
421 | (void) spl5(); | |
422 | while (canon(tp)>=0) | |
423 | ; | |
424 | (void) spl0(); | |
425 | /* fall into ... */ | |
426 | ||
d1778415 BJ |
427 | case NTTYDISC: |
428 | nread = tp->t_canq.c_cc; | |
429 | if (tp->t_flags & (RAW|CBREAK)) | |
430 | nread += tp->t_rawq.c_cc; | |
431 | break; | |
432 | ||
d1778415 | 433 | } |
8062c8a7 BJ |
434 | if (copyout((caddr_t)&nread, addr, sizeof (off_t))) |
435 | u.u_error = EFAULT; | |
436 | break; | |
437 | } | |
438 | ||
439 | /* | |
440 | * Should allow SPGRP and GPGRP only if tty open for reading. | |
441 | */ | |
442 | case TIOCSPGRP: | |
da1392b6 BJ |
443 | if (copyin(addr, (caddr_t)&tp->t_pgrp, sizeof (tp->t_pgrp))) |
444 | u.u_error = EFAULT; | |
8062c8a7 BJ |
445 | break; |
446 | ||
447 | case TIOCGPGRP: | |
448 | if (copyout((caddr_t)&tp->t_pgrp, addr, sizeof(tp->t_pgrp))) | |
449 | u.u_error = EFAULT; | |
450 | break; | |
451 | ||
452 | /* | |
453 | * Modify local mode word. | |
454 | */ | |
455 | case TIOCLBIS: | |
da1392b6 BJ |
456 | if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local))) |
457 | u.u_error = EFAULT; | |
458 | else | |
459 | tp->t_local |= temp; | |
8062c8a7 BJ |
460 | break; |
461 | ||
462 | case TIOCLBIC: | |
da1392b6 BJ |
463 | if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local))) |
464 | u.u_error = EFAULT; | |
465 | else | |
466 | tp->t_local &= ~temp; | |
8062c8a7 BJ |
467 | break; |
468 | ||
469 | case TIOCLSET: | |
da1392b6 BJ |
470 | if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local))) |
471 | u.u_error = EFAULT; | |
472 | else | |
473 | tp->t_local = temp; | |
8062c8a7 BJ |
474 | break; |
475 | ||
476 | case TIOCLGET: | |
477 | if (copyout((caddr_t)&tp->t_local, addr, sizeof(tp->t_local))) | |
89dc6dfb BJ |
478 | u.u_error = EFAULT; |
479 | break; | |
480 | ||
50e2732b BJ |
481 | /* |
482 | * Return number of characters in | |
483 | * the output. | |
484 | */ | |
0dde1c43 BJ |
485 | case TIOCOUTQ: |
486 | if (copyout((caddr_t)&tp->t_outq.c_cc, addr, sizeof(tp->t_outq.c_cc))) | |
487 | u.u_error = EFAULT; | |
488 | break; | |
489 | ||
50e2732b BJ |
490 | /* |
491 | * Simulate typing of a character at the terminal. | |
492 | */ | |
50450a20 BJ |
493 | case TIOCSTI: |
494 | c = fubyte(addr); | |
495 | if (u.u_uid && u.u_ttyp != tp || c < 0) | |
496 | u.u_error = EFAULT; | |
497 | else | |
498 | (*linesw[tp->t_line].l_rint)(c, tp); | |
499 | break; | |
8062c8a7 | 500 | /* end of locals */ |
50450a20 | 501 | |
89dc6dfb BJ |
502 | default: |
503 | return(0); | |
504 | } | |
505 | return(1); | |
506 | } |