1 | /* |
2 | * Copyright (c) 2019 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
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27 | */ |
28 | /* Copyright (c) 1997 Apple Computer, Inc. All Rights Reserved */ |
29 | /*- |
30 | * Copyright (c) 1982, 1986, 1991, 1993 |
31 | * The Regents of the University of California. All rights reserved. |
32 | * |
33 | * Redistribution and use in source and binary forms, with or without |
34 | * modification, are permitted provided that the following conditions |
35 | * are met: |
36 | * 1. Redistributions of source code must retain the above copyright |
37 | * notice, this list of conditions and the following disclaimer. |
38 | * 2. Redistributions in binary form must reproduce the above copyright |
39 | * notice, this list of conditions and the following disclaimer in the |
40 | * documentation and/or other materials provided with the distribution. |
41 | * 3. All advertising materials mentioning features or use of this software |
42 | * must display the following acknowledgement: |
43 | * This product includes software developed by the University of |
44 | * California, Berkeley and its contributors. |
45 | * 4. Neither the name of the University nor the names of its contributors |
46 | * may be used to endorse or promote products derived from this software |
47 | * without specific prior written permission. |
48 | * |
49 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
50 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
51 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
52 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
53 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
54 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
55 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
56 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
57 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
58 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
59 | * SUCH DAMAGE. |
60 | * |
61 | * @(#)tty_compat.c 8.1 (Berkeley) 6/10/93 |
62 | */ |
63 | |
64 | /* |
65 | * Compatibility routines for BSD 4.3 tty ioctl() commands |
66 | * |
67 | * The only function externalized from this file is ttcompat() and it is |
68 | * externalized as private extern to prevent exporting of the symbol when |
69 | * KEXTs link against the kernel. |
70 | * |
71 | * Locks: All functions in this file assume that the tty_lock() |
72 | * is held on the tty structure before these functions are |
73 | * called. |
74 | */ |
75 | |
76 | #include <sys/param.h> |
77 | #include <sys/systm.h> |
78 | #include <sys/ioctl.h> |
79 | #include <sys/proc_internal.h> |
80 | #include <sys/tty.h> |
81 | #include <sys/termios.h> |
82 | #include <sys/file_internal.h> |
83 | #include <sys/conf.h> |
84 | #include <sys/kernel.h> |
85 | #include <sys/sysctl.h> |
86 | #include <sys/syslog.h> |
87 | |
88 | static int ttcompatgetflags(struct tty *tp); |
89 | static void ttcompatsetflags(struct tty *tp, struct termios *t); |
90 | static void ttcompatsetlflags(struct tty *tp, struct termios *t); |
91 | static unsigned int ttcompatspeedtab(speed_t speed, struct speedtab *table); |
92 | |
93 | /* |
94 | * These two tables encode baud rate to speed code and speed code to |
95 | * baud rate information. They are a mapping between the <sys/termios.h> |
96 | * baud rate constants and the <sys/ttydev.h> baud rate constants. We |
97 | * cannot use those constants directly here because they occupy the same |
98 | * name space. |
99 | */ |
100 | static struct speedtab compatspeeds[] = { |
101 | #define MAX_SPEED 17 |
102 | { .sp_speed = 115200, .sp_code = 17 }, |
103 | { .sp_speed = 57600, .sp_code = 16 }, |
104 | { .sp_speed = 38400, .sp_code = 15 }, |
105 | { .sp_speed = 19200, .sp_code = 14 }, |
106 | { .sp_speed = 9600, .sp_code = 13 }, |
107 | { .sp_speed = 4800, .sp_code = 12 }, |
108 | { .sp_speed = 2400, .sp_code = 11 }, |
109 | { .sp_speed = 1800, .sp_code = 10 }, |
110 | { .sp_speed = 1200, .sp_code = 9 }, |
111 | { .sp_speed = 600, .sp_code = 8 }, |
112 | { .sp_speed = 300, .sp_code = 7 }, |
113 | { .sp_speed = 200, .sp_code = 6 }, |
114 | { .sp_speed = 150, .sp_code = 5 }, |
115 | { .sp_speed = 134, .sp_code = 4 }, |
116 | { .sp_speed = 110, .sp_code = 3 }, |
117 | { .sp_speed = 75, .sp_code = 2 }, |
118 | { .sp_speed = 50, .sp_code = 1 }, |
119 | { .sp_speed = 0, .sp_code = 0 }, |
120 | { .sp_speed = -1, .sp_code = -1 }, |
121 | }; |
122 | static int compatspcodes[] = { |
123 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, |
124 | 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200, |
125 | }; |
126 | |
127 | /* |
128 | * ttcompatspeedtab |
129 | * |
130 | * Description: Given a baud rate value as a speed_t, and a speed table, |
131 | * convert the baud rate to a speed code integer, according to the |
132 | * contents of the table. This effectively changes termios.h |
133 | * baud rate values into ttydev.h baud rate codes. |
134 | * |
135 | * Parameters: speed_t speed Baud rate |
136 | * struct speedtab *table Baud rate table to speed code table |
137 | * |
138 | * Returns: 1 B50 speed code; returned if we can |
139 | * not find an answer in the table. |
140 | * 0 If a 0 was requested in order to |
141 | * trigger a hangup (250ms of line |
142 | * silence, per Bell 103C standard). |
143 | * [2, MAX_SPEED] A speed code matching the requested |
144 | * baud rate (potentially rounded down, |
145 | * if there is no exact match). |
146 | * |
147 | * Notes: This function is used for TIOCGETP, TIOCSETP, and TIOCSETN. |
148 | */ |
149 | static unsigned int |
150 | ttcompatspeedtab(speed_t speed, struct speedtab *table) |
151 | { |
152 | if (speed == 0) { |
153 | return 0; /* hangup */ |
154 | } |
155 | for (; table->sp_speed > 0; table++) { |
156 | if (table->sp_speed <= speed) { /* nearest one, rounded down */ |
157 | return (unsigned int)table->sp_code; |
158 | } |
159 | } |
160 | return 1; /* 50, min and not hangup */ |
161 | } |
162 | |
163 | |
164 | /* |
165 | * ttsetcompat |
166 | * |
167 | * Description: Convert backward compatability set command arguments as |
168 | * follows: |
169 | * |
170 | * TIOCSETP -> TIOSETAF |
171 | * TIOCSETN -> TIOCSETA |
172 | * TIOCSETC -> TIOCSETA |
173 | * TIOCSLTC -> TIOCSETA |
174 | * TIOCLBIS -> TIOCSETA |
175 | * TIOCLBIC -> TIOCSETA |
176 | * TIOCLSET -> TIOCSETA |
177 | * |
178 | * The converted command argument and potentially modified 'term' |
179 | * argument are returned to ttcompat(), which will then call |
180 | * ttioctl_locked(), if this function returns successfully. |
181 | * |
182 | * Parameters struct tty *tp The tty on which the operation is |
183 | * being performed. |
184 | * u_long *com A pointer to the terminal input/output |
185 | * command being requested; its contents |
186 | * will be modified per the table above, |
187 | * on a non-error return. |
188 | * caddr_t data Command specific parameter data; this |
189 | * data is read but not modified. |
190 | * struct termios *term A local stack termios structure from |
191 | * ttcompat(), whose contents are to be |
192 | * modified based on *com and *data. |
193 | * |
194 | * Returns: EINVAL An input speed or output speed is |
195 | * outside the allowable range for a |
196 | * TIOCSETP or TIOCSETN command. |
197 | * 0 All other cases return 0. |
198 | * |
199 | * Notes: This function may modify the contents of the tp->t_flags |
200 | * field in a successful call to TIOCSETP, TIOCSETN, TIOCLBIS, |
201 | * TIOCLBIC, or TIOCLSET. |
202 | * |
203 | * All other tp fields will remain unmodifed, since the struct |
204 | * termios is a local stack copy from ttcompat(), and not the |
205 | * real thing. A subsequent call to ttioctl_locked() in |
206 | * ttcompat(), however, may result in subsequent changes. |
207 | * |
208 | * WARNING: This compatibility code is not 64/32 clean; it will only |
209 | * work for 32 bit processes on 32 bit kernels or 64 bit |
210 | * processes on 64 bit kernels. We are not addressing this |
211 | * due to <rdar://6904053>. |
212 | */ |
213 | static int |
214 | ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term) |
215 | { |
216 | switch (*com) { |
217 | case TIOCSETP: |
218 | /* |
219 | * Wait for all characters queued for output to drain, then |
220 | * Discard all characters queued for input, and then set |
221 | * the input and output speeds and device flags, per the |
222 | * contents of the struct sgttyb that 'data' points to. |
223 | */ |
224 | case TIOCSETN: |
225 | /* |
226 | * Same as TIOCSETP, but the output is not drained, and any |
227 | * pending input is not discarded. |
228 | */ |
229 | { |
230 | __IGNORE_WCASTALIGN(struct sgttyb *sg = (struct sgttyb *)data); |
231 | if (sg->sg_ispeed < 0) { |
232 | return EINVAL; |
233 | } |
234 | unsigned int ispeed = (unsigned int)sg->sg_ispeed; |
235 | if (ispeed > MAX_SPEED) { |
236 | return EINVAL; |
237 | } |
238 | if (ispeed != ttcompatspeedtab(speed: tp->t_ispeed, table: compatspeeds)) { |
239 | term->c_ispeed = compatspcodes[ispeed]; |
240 | } else { |
241 | term->c_ispeed = tp->t_ispeed; |
242 | } |
243 | |
244 | /* |
245 | * Can't error out at the beginning due to potential for |
246 | * backwards-incompatibility. For instance: |
247 | * |
248 | * struct sgttyb sg; // uninitialized |
249 | * sg.sg_ispeed = SOME_VALID_VALUE; |
250 | * |
251 | * Should still set the input speed. |
252 | */ |
253 | if (sg->sg_ospeed < 0) { |
254 | return EINVAL; |
255 | } |
256 | unsigned int ospeed = (unsigned int)sg->sg_ospeed; |
257 | if (ospeed > MAX_SPEED) { |
258 | return EINVAL; |
259 | } |
260 | if (ospeed != ttcompatspeedtab(speed: tp->t_ospeed, table: compatspeeds)) { |
261 | term->c_ospeed = compatspcodes[ospeed]; |
262 | } else { |
263 | term->c_ospeed = tp->t_ospeed; |
264 | } |
265 | |
266 | term->c_cc[VERASE] = sg->sg_erase; |
267 | term->c_cc[VKILL] = sg->sg_kill; |
268 | tp->t_flags = (tp->t_flags & 0xffff0000) | (sg->sg_flags & 0xffff); |
269 | ttcompatsetflags(tp, t: term); |
270 | *com = (*com == TIOCSETP) ? TIOCSETAF : TIOCSETA; |
271 | break; |
272 | } |
273 | case TIOCSETC: |
274 | /* |
275 | * Set the terminal control characters per the contents of |
276 | * the struct tchars that 'data' points to. |
277 | */ |
278 | { |
279 | __IGNORE_WCASTALIGN(struct tchars *tc = (struct tchars *)data); |
280 | cc_t *cc; |
281 | |
282 | cc = term->c_cc; |
283 | cc[VINTR] = tc->t_intrc; |
284 | cc[VQUIT] = tc->t_quitc; |
285 | cc[VSTART] = tc->t_startc; |
286 | cc[VSTOP] = tc->t_stopc; |
287 | cc[VEOF] = tc->t_eofc; |
288 | cc[VEOL] = tc->t_brkc; |
289 | if (tc->t_brkc == -1) { |
290 | cc[VEOL2] = _POSIX_VDISABLE; |
291 | } |
292 | *com = TIOCSETA; |
293 | break; |
294 | } |
295 | case TIOCSLTC: |
296 | /* |
297 | * Set the terminal control characters per the contents of |
298 | * the struct ltchars that 'data' points to. |
299 | */ |
300 | { |
301 | __IGNORE_WCASTALIGN(struct ltchars *ltc = (struct ltchars *)data); |
302 | cc_t *cc; |
303 | |
304 | cc = term->c_cc; |
305 | cc[VSUSP] = ltc->t_suspc; |
306 | cc[VDSUSP] = ltc->t_dsuspc; |
307 | cc[VREPRINT] = ltc->t_rprntc; |
308 | cc[VDISCARD] = ltc->t_flushc; |
309 | cc[VWERASE] = ltc->t_werasc; |
310 | cc[VLNEXT] = ltc->t_lnextc; |
311 | *com = TIOCSETA; |
312 | break; |
313 | } |
314 | case TIOCLBIS: |
315 | /* |
316 | * Set the bits in the terminal state local flags word |
317 | * (16 bits) for the terminal to the current bits OR |
318 | * those in the 16 bit value pointed to by 'data'. |
319 | */ |
320 | case TIOCLBIC: |
321 | /* |
322 | * Clear the bits in the terminal state local flags word |
323 | * for the terminal to the current bits AND those bits NOT |
324 | * in the 16 bit value pointed to by 'data'. |
325 | */ |
326 | case TIOCLSET: |
327 | /* |
328 | * Set the terminal state local flags word to exactly those |
329 | * bits that correspond to the 16 bit value pointed to by |
330 | * 'data'. |
331 | */ |
332 | { |
333 | __IGNORE_WCASTALIGN(int set = *(int *)data); |
334 | if (*com == TIOCLSET) { |
335 | tp->t_flags = (tp->t_flags & 0xffff) | set << 16; |
336 | } else { |
337 | tp->t_flags = |
338 | (ttcompatgetflags(tp) & 0xffff0000) | (tp->t_flags & 0xffff); |
339 | if (*com == TIOCLBIS) { |
340 | tp->t_flags |= set << 16; |
341 | } else { |
342 | tp->t_flags &= ~(set << 16); |
343 | } |
344 | } |
345 | ttcompatsetlflags(tp, t: term); |
346 | *com = TIOCSETA; |
347 | break; |
348 | } |
349 | } |
350 | return 0; |
351 | } |
352 | |
353 | /* |
354 | * ttcompat |
355 | * |
356 | * Description: For 'set' commands, convert the command and arguments as |
357 | * necessary, and call ttioctl_locked(), returning the result |
358 | * as our result; for 'get' commands, obtain the requested data |
359 | * from the appropriate source, and return it in the expected |
360 | * format. If the command is not recognized, return EINVAL. |
361 | * |
362 | * Parameters struct tty *tp The tty on which the operation is |
363 | * being performed. |
364 | * u_long com The terminal input/output command |
365 | * being requested. |
366 | * caddr_t data The pointer to the user data argument |
367 | * provided with the command. |
368 | * int flag The file open flags (e.g. FREAD). |
369 | * struct proc *p The current process pointer for the |
370 | * operation. |
371 | * |
372 | * Returns: 0 Most 'get' operations can't fail, and |
373 | * therefore return this. |
374 | * ENOTTY TIOCGSID may return this when you |
375 | * attempt to get the session ID for a |
376 | * terminal with no associated session, |
377 | * or for which there is a session, but |
378 | * no session leader. |
379 | * ENOTTY If the command cannot be handled at |
380 | * this layer, this will be returned. |
381 | * * Any value returned by ttioctl_locked(), |
382 | * if a set command is requested. |
383 | * |
384 | * Notes: The process pointer may be a proxy on whose behalf we are |
385 | * operating, so it is not safe to simply use current_process() |
386 | * instead. |
387 | */ |
388 | /*ARGSUSED*/ |
389 | __private_extern__ int |
390 | ttcompat(struct tty *tp, u_long com, caddr_t data, int flag, struct proc *p) |
391 | { |
392 | switch (com) { |
393 | case TIOCSETP: |
394 | case TIOCSETN: |
395 | case TIOCSETC: |
396 | case TIOCSLTC: |
397 | case TIOCLBIS: |
398 | case TIOCLBIC: |
399 | case TIOCLSET: |
400 | /* |
401 | * See ttsetcompat() for a full description of these command |
402 | * values and their meanings. |
403 | */ |
404 | { |
405 | struct termios term; |
406 | int error; |
407 | |
408 | term = tp->t_termios; |
409 | if ((error = ttsetcompat(tp, com: &com, data, term: &term)) != 0) { |
410 | return error; |
411 | } |
412 | return ttioctl_locked(tp, com, data: (caddr_t) &term, flag, p); |
413 | } |
414 | case TIOCGETP: |
415 | /* |
416 | * Get the current input and output speeds, and device |
417 | * flags, into the structure pointed to by 'data'. |
418 | */ |
419 | { |
420 | __IGNORE_WCASTALIGN(struct sgttyb *sg = (struct sgttyb *)data); |
421 | cc_t *cc = tp->t_cc; |
422 | |
423 | static_assert(MAX_SPEED <= CHAR_MAX, "maximum speed fits in a char" ); |
424 | sg->sg_ospeed = (char)ttcompatspeedtab(speed: tp->t_ospeed, table: compatspeeds); |
425 | if (tp->t_ispeed == 0) { |
426 | sg->sg_ispeed = sg->sg_ospeed; |
427 | } else { |
428 | sg->sg_ispeed = (char)ttcompatspeedtab(speed: tp->t_ispeed, table: compatspeeds); |
429 | } |
430 | sg->sg_erase = cc[VERASE]; |
431 | sg->sg_kill = cc[VKILL]; |
432 | tp->t_flags = ttcompatgetflags(tp); |
433 | sg->sg_flags = (short)tp->t_flags; |
434 | break; |
435 | } |
436 | case TIOCGETC: |
437 | /* |
438 | * Get the terminal control characters into the struct |
439 | * tchars that 'data' points to. |
440 | */ |
441 | { |
442 | struct tchars *tc = (struct tchars *)data; |
443 | cc_t *cc = tp->t_cc; |
444 | |
445 | tc->t_intrc = cc[VINTR]; |
446 | tc->t_quitc = cc[VQUIT]; |
447 | tc->t_startc = cc[VSTART]; |
448 | tc->t_stopc = cc[VSTOP]; |
449 | tc->t_eofc = cc[VEOF]; |
450 | tc->t_brkc = cc[VEOL]; |
451 | break; |
452 | } |
453 | case TIOCGLTC: |
454 | /* |
455 | * Get the terminal control characters into the struct |
456 | * ltchars that 'data' points to. |
457 | */ |
458 | { |
459 | struct ltchars *ltc = (struct ltchars *)data; |
460 | cc_t *cc = tp->t_cc; |
461 | |
462 | ltc->t_suspc = cc[VSUSP]; |
463 | ltc->t_dsuspc = cc[VDSUSP]; |
464 | ltc->t_rprntc = cc[VREPRINT]; |
465 | ltc->t_flushc = cc[VDISCARD]; |
466 | ltc->t_werasc = cc[VWERASE]; |
467 | ltc->t_lnextc = cc[VLNEXT]; |
468 | break; |
469 | } |
470 | case TIOCLGET: |
471 | /* |
472 | * Get the terminal state local flags word into the 16 bit |
473 | * value pointed to by 'data'. |
474 | */ |
475 | tp->t_flags = |
476 | (ttcompatgetflags(tp) & 0xffff0000UL) |
477 | | (tp->t_flags & 0xffff); |
478 | *(int *)data = tp->t_flags >> 16; |
479 | break; |
480 | |
481 | case OTIOCGETD: |
482 | /* |
483 | * Get the current line discipline into the int pointed to |
484 | * by 'data'. |
485 | */ |
486 | *(int *)data = tp->t_line ? tp->t_line : 2; |
487 | break; |
488 | |
489 | case OTIOCSETD: |
490 | /* |
491 | * Set the current line discipline based on the value of the |
492 | * int pointed to by 'data'. |
493 | */ |
494 | { |
495 | int ldisczero = 0; |
496 | |
497 | return ttioctl_locked(tp, TIOCSETD, |
498 | data: *(int *)data == 2 ? (caddr_t)&ldisczero : data, flag, p); |
499 | } |
500 | |
501 | case OTIOCCONS: |
502 | /* |
503 | * Become the console device. |
504 | */ |
505 | *(int *)data = 1; |
506 | return ttioctl_locked(tp, TIOCCONS, data, flag, p); |
507 | |
508 | case TIOCGSID: |
509 | /* |
510 | * Get the current session ID (controlling process' PID). |
511 | */ |
512 | if (tp->t_session == NULL) { |
513 | return ENOTTY; |
514 | } |
515 | |
516 | if (tp->t_session->s_leader == NULL) { |
517 | return ENOTTY; |
518 | } |
519 | |
520 | *(int *) data = proc_getpid(tp->t_session->s_leader); |
521 | break; |
522 | |
523 | default: |
524 | /* |
525 | * This ioctl is not handled at this layer. |
526 | */ |
527 | return ENOTTY; |
528 | } |
529 | |
530 | /* |
531 | * Successful 'get' operation. |
532 | */ |
533 | return 0; |
534 | } |
535 | |
536 | /* |
537 | * ttcompatgetflags |
538 | * |
539 | * Description: Get the terminal state local flags, device flags, and current |
540 | * speed code for the device (all 32 bits are returned). |
541 | * |
542 | * Parameters struct tty *tp The tty on which the operation is |
543 | * being performed. |
544 | * |
545 | * Returns: * Integer value corresponding to the |
546 | * current terminal state local flags |
547 | * word. |
548 | * |
549 | * Notes: Caller is responsible for breaking these bits back out into |
550 | * separate 16 bit filelds, if that's what was actually desired. |
551 | */ |
552 | static int |
553 | ttcompatgetflags(struct tty *tp) |
554 | { |
555 | tcflag_t iflag = tp->t_iflag; |
556 | tcflag_t lflag = tp->t_lflag; |
557 | tcflag_t oflag = tp->t_oflag; |
558 | tcflag_t cflag = tp->t_cflag; |
559 | int flags = 0; |
560 | |
561 | if (iflag & IXOFF) { |
562 | flags |= TANDEM; |
563 | } |
564 | if (iflag & ICRNL || oflag & ONLCR) { |
565 | flags |= CRMOD; |
566 | } |
567 | if ((cflag & CSIZE) == CS8) { |
568 | flags |= PASS8; |
569 | if (iflag & ISTRIP) { |
570 | flags |= ANYP; |
571 | } |
572 | } else if (cflag & PARENB) { |
573 | if (iflag & INPCK) { |
574 | if (cflag & PARODD) { |
575 | flags |= ODDP; |
576 | } else { |
577 | flags |= EVENP; |
578 | } |
579 | } else { |
580 | flags |= EVENP | ODDP; |
581 | } |
582 | } |
583 | |
584 | if ((lflag & ICANON) == 0) { |
585 | /* fudge */ |
586 | if (iflag & (INPCK | ISTRIP | IXON) || lflag & (IEXTEN | ISIG) |
587 | || (cflag & (CSIZE | PARENB)) != CS8) { |
588 | flags |= CBREAK; |
589 | } else { |
590 | flags |= RAW; |
591 | } |
592 | } |
593 | if (!(flags & RAW) && !(oflag & OPOST) && (cflag & (CSIZE | PARENB)) == CS8) { |
594 | flags |= LITOUT; |
595 | } |
596 | if (cflag & MDMBUF) { |
597 | flags |= MDMBUF; |
598 | } |
599 | if ((cflag & HUPCL) == 0) { |
600 | flags |= NOHANG; |
601 | } |
602 | if (oflag & OXTABS) { |
603 | flags |= XTABS; |
604 | } |
605 | if (lflag & ECHOE) { |
606 | flags |= CRTERA | CRTBS; |
607 | } |
608 | if (lflag & ECHOKE) { |
609 | flags |= CRTKIL | CRTBS; |
610 | } |
611 | if (lflag & ECHOPRT) { |
612 | flags |= PRTERA; |
613 | } |
614 | if (lflag & ECHOCTL) { |
615 | flags |= CTLECH; |
616 | } |
617 | if ((iflag & IXANY) == 0) { |
618 | flags |= DECCTQ; |
619 | } |
620 | flags |= lflag & (ECHO | TOSTOP | FLUSHO | PENDIN | NOFLSH); |
621 | return flags; |
622 | } |
623 | |
624 | /* |
625 | * ttcompatsetflags |
626 | * |
627 | * Description: Given a set of compatability flags, convert the compatability |
628 | * flags in the terminal flags fields into canonical flags in the |
629 | * provided termios struct. |
630 | * |
631 | * Parameters: struct tty *tp The tty on which the operation is |
632 | * being performed. |
633 | * struct termios *t The termios structure into which to |
634 | * return the converted flags. |
635 | * |
636 | * Returns: void (implicit: *t, modified) |
637 | */ |
638 | static void |
639 | ttcompatsetflags(struct tty *tp, struct termios *t) |
640 | { |
641 | int flags = tp->t_flags; |
642 | tcflag_t iflag = t->c_iflag; |
643 | tcflag_t oflag = t->c_oflag; |
644 | tcflag_t lflag = t->c_lflag; |
645 | tcflag_t cflag = t->c_cflag; |
646 | |
647 | if (flags & RAW) { |
648 | iflag = IGNBRK; |
649 | lflag &= ~(ECHOCTL | ISIG | ICANON | IEXTEN); |
650 | } else { |
651 | iflag &= ~(PARMRK | IGNPAR | IGNCR | INLCR); |
652 | iflag |= BRKINT | IXON | IMAXBEL; |
653 | lflag |= ISIG | IEXTEN | ECHOCTL; /* XXX was echoctl on ? */ |
654 | if (flags & XTABS) { |
655 | oflag |= OXTABS; |
656 | } else { |
657 | oflag &= ~OXTABS; |
658 | } |
659 | if (flags & CBREAK) { |
660 | lflag &= ~ICANON; |
661 | } else { |
662 | lflag |= ICANON; |
663 | } |
664 | if (flags & CRMOD) { |
665 | iflag |= ICRNL; |
666 | oflag |= ONLCR; |
667 | } else { |
668 | iflag &= ~ICRNL; |
669 | oflag &= ~ONLCR; |
670 | } |
671 | } |
672 | if (flags & ECHO) { |
673 | lflag |= ECHO; |
674 | } else { |
675 | lflag &= ~ECHO; |
676 | } |
677 | |
678 | cflag &= ~(CSIZE | PARENB); |
679 | if (flags & (RAW | LITOUT | PASS8)) { |
680 | cflag |= CS8; |
681 | if (!(flags & (RAW | PASS8)) |
682 | || (flags & (RAW | PASS8 | ANYP)) == (PASS8 | ANYP)) { |
683 | iflag |= ISTRIP; |
684 | } else { |
685 | iflag &= ~ISTRIP; |
686 | } |
687 | if (flags & (RAW | LITOUT)) { |
688 | oflag &= ~OPOST; |
689 | } else { |
690 | oflag |= OPOST; |
691 | } |
692 | } else { |
693 | cflag |= CS7 | PARENB; |
694 | iflag |= ISTRIP; |
695 | oflag |= OPOST; |
696 | } |
697 | /* XXX don't set INPCK if RAW or PASS8? */ |
698 | if ((flags & (EVENP | ODDP)) == EVENP) { |
699 | iflag |= INPCK; |
700 | cflag &= ~PARODD; |
701 | } else if ((flags & (EVENP | ODDP)) == ODDP) { |
702 | iflag |= INPCK; |
703 | cflag |= PARODD; |
704 | } else { |
705 | iflag &= ~INPCK; |
706 | } |
707 | if (flags & TANDEM) { |
708 | iflag |= IXOFF; |
709 | } else { |
710 | iflag &= ~IXOFF; |
711 | } |
712 | if ((flags & DECCTQ) == 0) { |
713 | iflag |= IXANY; |
714 | } else { |
715 | iflag &= ~IXANY; |
716 | } |
717 | t->c_iflag = iflag; |
718 | t->c_oflag = oflag; |
719 | t->c_lflag = lflag; |
720 | t->c_cflag = cflag; |
721 | } |
722 | |
723 | /* |
724 | * ttcompatsetlflags |
725 | * |
726 | * Description: Given a set of compatability terminal state local flags, |
727 | * convert the compatability flags in the terminal flags |
728 | * fields into canonical flags in the provided termios struct. |
729 | * |
730 | * Parameters: struct tty *tp The tty on which the operation is |
731 | * being performed. |
732 | * struct termios *t The termios structure into which to |
733 | * return the converted local flags. |
734 | * |
735 | * Returns: void (implicit: *t, modified) |
736 | */ |
737 | static void |
738 | ttcompatsetlflags(struct tty *tp, struct termios *t) |
739 | { |
740 | int flags = tp->t_flags; |
741 | tcflag_t iflag = t->c_iflag; |
742 | tcflag_t oflag = t->c_oflag; |
743 | tcflag_t lflag = t->c_lflag; |
744 | tcflag_t cflag = t->c_cflag; |
745 | |
746 | iflag &= ~(PARMRK | IGNPAR | IGNCR | INLCR); |
747 | if (flags & CRTERA) { |
748 | lflag |= ECHOE; |
749 | } else { |
750 | lflag &= ~ECHOE; |
751 | } |
752 | if (flags & CRTKIL) { |
753 | lflag |= ECHOKE; |
754 | } else { |
755 | lflag &= ~ECHOKE; |
756 | } |
757 | if (flags & PRTERA) { |
758 | lflag |= ECHOPRT; |
759 | } else { |
760 | lflag &= ~ECHOPRT; |
761 | } |
762 | if (flags & CTLECH) { |
763 | lflag |= ECHOCTL; |
764 | } else { |
765 | lflag &= ~ECHOCTL; |
766 | } |
767 | if (flags & TANDEM) { |
768 | iflag |= IXOFF; |
769 | } else { |
770 | iflag &= ~IXOFF; |
771 | } |
772 | if ((flags & DECCTQ) == 0) { |
773 | iflag |= IXANY; |
774 | } else { |
775 | iflag &= ~IXANY; |
776 | } |
777 | if (flags & MDMBUF) { |
778 | cflag |= MDMBUF; |
779 | } else { |
780 | cflag &= ~MDMBUF; |
781 | } |
782 | if (flags & NOHANG) { |
783 | cflag &= ~HUPCL; |
784 | } else { |
785 | cflag |= HUPCL; |
786 | } |
787 | lflag &= ~(TOSTOP | FLUSHO | PENDIN | NOFLSH); |
788 | lflag |= flags & (TOSTOP | FLUSHO | PENDIN | NOFLSH); |
789 | |
790 | /* |
791 | * The next if-else statement is copied from above so don't bother |
792 | * checking it separately. We could avoid fiddlling with the |
793 | * character size if the mode is already RAW or if neither the |
794 | * LITOUT bit or the PASS8 bit is being changed, but the delta of |
795 | * the change is not available here and skipping the RAW case would |
796 | * make the code different from above. |
797 | */ |
798 | cflag &= ~(CSIZE | PARENB); |
799 | if (flags & (RAW | LITOUT | PASS8)) { |
800 | cflag |= CS8; |
801 | if (!(flags & (RAW | PASS8)) |
802 | || (flags & (RAW | PASS8 | ANYP)) == (PASS8 | ANYP)) { |
803 | iflag |= ISTRIP; |
804 | } else { |
805 | iflag &= ~ISTRIP; |
806 | } |
807 | if (flags & (RAW | LITOUT)) { |
808 | oflag &= ~OPOST; |
809 | } else { |
810 | oflag |= OPOST; |
811 | } |
812 | } else { |
813 | cflag |= CS7 | PARENB; |
814 | iflag |= ISTRIP; |
815 | oflag |= OPOST; |
816 | } |
817 | t->c_iflag = iflag; |
818 | t->c_oflag = oflag; |
819 | t->c_lflag = lflag; |
820 | t->c_cflag = cflag; |
821 | } |
822 | |