1 | /* |
2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
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 int ttcompatspeedtab(int 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 | { 115200, 17 }, |
103 | { 57600, 16 }, |
104 | { 38400, 15 }, |
105 | { 19200, 14 }, |
106 | { 9600, 13 }, |
107 | { 4800, 12 }, |
108 | { 2400, 11 }, |
109 | { 1800, 10 }, |
110 | { 1200, 9 }, |
111 | { 600, 8 }, |
112 | { 300, 7 }, |
113 | { 200, 6 }, |
114 | { 150, 5 }, |
115 | { 134, 4 }, |
116 | { 110, 3 }, |
117 | { 75, 2 }, |
118 | { 50, 1 }, |
119 | { 0, 0 }, |
120 | { -1, -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 an integer, and a speed table, |
131 | * convert the baud rate to a speed code, 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: int speed Baud rate, as an integer |
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 | * * 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 int |
150 | ttcompatspeedtab(int speed, struct speedtab *table) |
151 | { |
152 | if (speed == 0) |
153 | return (0); /* hangup */ |
154 | for ( ; table->sp_speed > 0; table++) |
155 | if (table->sp_speed <= speed) /* nearest one, rounded down */ |
156 | return (table->sp_code); |
157 | return (1); /* 50, min and not hangup */ |
158 | } |
159 | |
160 | |
161 | /* |
162 | * ttsetcompat |
163 | * |
164 | * Description: Convert backward compatability set command arguments as |
165 | * follows: |
166 | * |
167 | * TIOCSETP -> TIOSETAF |
168 | * TIOCSETN -> TIOCSETA |
169 | * TIOCSETC -> TIOCSETA |
170 | * TIOCSLTC -> TIOCSETA |
171 | * TIOCLBIS -> TIOCSETA |
172 | * TIOCLBIC -> TIOCSETA |
173 | * TIOCLSET -> TIOCSETA |
174 | * |
175 | * The converted command argument and potentially modified 'term' |
176 | * argument are returned to ttcompat(), which will then call |
177 | * ttioctl_locked(), if this function returns successfully. |
178 | * |
179 | * Parameters struct tty *tp The tty on which the operation is |
180 | * being performed. |
181 | * u_long *com A pointer to the terminal input/output |
182 | * command being requested; its contents |
183 | * will be modified per the table above, |
184 | * on a non-error return. |
185 | * caddr_t data Command specific parameter data; this |
186 | * data is read but not modified. |
187 | * struct termios *term A local stack termios structure from |
188 | * ttcompat(), whose contents are to be |
189 | * modified based on *com and *data. |
190 | * |
191 | * Returns: EINVAL An input speed or output speed is |
192 | * outside the allowable range for a |
193 | * TIOCSETP or TIOCSETN command. |
194 | * 0 All other cases return 0. |
195 | * |
196 | * Notes: This function may modify the contents of the tp->t_flags |
197 | * field in a successful call to TIOCSETP, TIOCSETN, TIOCLBIS, |
198 | * TIOCLBIC, or TIOCLSET. |
199 | * |
200 | * All other tp fields will remain unmodifed, since the struct |
201 | * termios is a local stack copy from ttcompat(), and not the |
202 | * real thing. A subsequent call to ttioctl_locked() in |
203 | * ttcompat(), however, may result in subsequent changes. |
204 | * |
205 | * WARNING: This compatibility code is not 6/432 clean; it will only |
206 | * work for 32 bit processes on 32 bit kernels or 64 bit |
207 | * processes on 64 bit kernels. We are not addressing this |
208 | * due to <rdar://6904053>. |
209 | */ |
210 | static int |
211 | ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term) |
212 | { |
213 | switch (*com) { |
214 | case TIOCSETP: |
215 | /* |
216 | * Wait for all characters queued for output to drain, then |
217 | * Discard all characters queued for input, and then set |
218 | * the input and output speeds and device flags, per the |
219 | * contents of the struct sgttyb that 'data' points to. |
220 | */ |
221 | case TIOCSETN: |
222 | /* |
223 | * Same as TIOCSETP, but the output is not drained, and any |
224 | * pending input is not discarded. |
225 | */ |
226 | { |
227 | struct sgttyb *sg = (struct sgttyb *)data; |
228 | int speed; |
229 | |
230 | if ((speed = sg->sg_ispeed) > MAX_SPEED || speed < 0) |
231 | return(EINVAL); |
232 | else if (speed != ttcompatspeedtab(tp->t_ispeed, compatspeeds)) |
233 | term->c_ispeed = compatspcodes[speed]; |
234 | else |
235 | term->c_ispeed = tp->t_ispeed; |
236 | if ((speed = sg->sg_ospeed) > MAX_SPEED || speed < 0) |
237 | return(EINVAL); |
238 | else if (speed != ttcompatspeedtab(tp->t_ospeed, compatspeeds)) |
239 | term->c_ospeed = compatspcodes[speed]; |
240 | else |
241 | term->c_ospeed = tp->t_ospeed; |
242 | term->c_cc[VERASE] = sg->sg_erase; |
243 | term->c_cc[VKILL] = sg->sg_kill; |
244 | tp->t_flags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff); |
245 | ttcompatsetflags(tp, term); |
246 | *com = (*com == TIOCSETP) ? TIOCSETAF : TIOCSETA; |
247 | break; |
248 | } |
249 | case TIOCSETC: |
250 | /* |
251 | * Set the terminal control characters per the contents of |
252 | * the struct tchars that 'data' points to. |
253 | */ |
254 | { |
255 | struct tchars *tc = (struct tchars *)data; |
256 | cc_t *cc; |
257 | |
258 | cc = term->c_cc; |
259 | cc[VINTR] = tc->t_intrc; |
260 | cc[VQUIT] = tc->t_quitc; |
261 | cc[VSTART] = tc->t_startc; |
262 | cc[VSTOP] = tc->t_stopc; |
263 | cc[VEOF] = tc->t_eofc; |
264 | cc[VEOL] = tc->t_brkc; |
265 | if (tc->t_brkc == -1) |
266 | cc[VEOL2] = _POSIX_VDISABLE; |
267 | *com = TIOCSETA; |
268 | break; |
269 | } |
270 | case TIOCSLTC: |
271 | /* |
272 | * Set the terminal control characters per the contents of |
273 | * the struct ltchars that 'data' points to. |
274 | */ |
275 | { |
276 | struct ltchars *ltc = (struct ltchars *)data; |
277 | cc_t *cc; |
278 | |
279 | cc = term->c_cc; |
280 | cc[VSUSP] = ltc->t_suspc; |
281 | cc[VDSUSP] = ltc->t_dsuspc; |
282 | cc[VREPRINT] = ltc->t_rprntc; |
283 | cc[VDISCARD] = ltc->t_flushc; |
284 | cc[VWERASE] = ltc->t_werasc; |
285 | cc[VLNEXT] = ltc->t_lnextc; |
286 | *com = TIOCSETA; |
287 | break; |
288 | } |
289 | case TIOCLBIS: |
290 | /* |
291 | * Set the bits in the terminal state local flags word |
292 | * (16 bits) for the terminal to the current bits OR |
293 | * those in the 16 bit value pointed to by 'data'. |
294 | */ |
295 | case TIOCLBIC: |
296 | /* |
297 | * Clear the bits in the terminal state local flags word |
298 | * for the terminal to the current bits AND those bits NOT |
299 | * in the 16 bit value pointed to by 'data'. |
300 | */ |
301 | case TIOCLSET: |
302 | /* |
303 | * Set the terminal state local flags word to exactly those |
304 | * bits that correspond to the 16 bit value pointed to by |
305 | * 'data'. |
306 | */ |
307 | if (*com == TIOCLSET) |
308 | tp->t_flags = (tp->t_flags&0xffff) | *(int *)data<<16; |
309 | else { |
310 | tp->t_flags = |
311 | (ttcompatgetflags(tp)&0xffff0000)|(tp->t_flags&0xffff); |
312 | if (*com == TIOCLBIS) |
313 | tp->t_flags |= *(int *)data<<16; |
314 | else |
315 | tp->t_flags &= ~(*(int *)data<<16); |
316 | } |
317 | ttcompatsetlflags(tp, term); |
318 | *com = TIOCSETA; |
319 | break; |
320 | } |
321 | return 0; |
322 | } |
323 | |
324 | /* |
325 | * ttcompat |
326 | * |
327 | * Description: For 'set' commands, convert the command and arguments as |
328 | * necessary, and call ttioctl_locked(), returning the result |
329 | * as our result; for 'get' commands, obtain the requested data |
330 | * from the appropriate source, and return it in the expected |
331 | * format. If the command is not recognized, return EINVAL. |
332 | * |
333 | * Parameters struct tty *tp The tty on which the operation is |
334 | * being performed. |
335 | * u_long com The terminal input/output command |
336 | * being requested. |
337 | * caddr_t data The pointer to the user data argument |
338 | * provided with the command. |
339 | * int flag The file open flags (e.g. FREAD). |
340 | * struct proc *p The current process pointer for the |
341 | * operation. |
342 | * |
343 | * Returns: 0 Most 'get' operations can't fail, and |
344 | * therefore return this. |
345 | * ENOTTY TIOCGSID may return this when you |
346 | * attempt to get the session ID for a |
347 | * terminal with no associated session, |
348 | * or for which there is a session, but |
349 | * no session leader. |
350 | * ENOTTY If the command cannot be handled at |
351 | * this layer, this will be returned. |
352 | * * Any value returned by ttioctl_locked(), |
353 | * if a set command is requested. |
354 | * |
355 | * Notes: The process pointer may be a proxy on whose behalf we are |
356 | * operating, so it is not safe to simply use current_process() |
357 | * instead. |
358 | */ |
359 | /*ARGSUSED*/ |
360 | __private_extern__ int |
361 | ttcompat(struct tty *tp, u_long com, caddr_t data, int flag, struct proc *p) |
362 | { |
363 | switch (com) { |
364 | case TIOCSETP: |
365 | case TIOCSETN: |
366 | case TIOCSETC: |
367 | case TIOCSLTC: |
368 | case TIOCLBIS: |
369 | case TIOCLBIC: |
370 | case TIOCLSET: |
371 | /* |
372 | * See ttsetcompat() for a full description of these command |
373 | * values and their meanings. |
374 | */ |
375 | { |
376 | struct termios term; |
377 | int error; |
378 | |
379 | term = tp->t_termios; |
380 | if ((error = ttsetcompat(tp, &com, data, &term)) != 0) |
381 | return error; |
382 | return ttioctl_locked(tp, com, (caddr_t) &term, flag, p); |
383 | } |
384 | case TIOCGETP: |
385 | /* |
386 | * Get the current input and output speeds, and device |
387 | * flags, into the structure pointed to by 'data'. |
388 | */ |
389 | { |
390 | struct sgttyb *sg = (struct sgttyb *)data; |
391 | cc_t *cc = tp->t_cc; |
392 | |
393 | sg->sg_ospeed = ttcompatspeedtab(tp->t_ospeed, compatspeeds); |
394 | if (tp->t_ispeed == 0) |
395 | sg->sg_ispeed = sg->sg_ospeed; |
396 | else |
397 | sg->sg_ispeed = ttcompatspeedtab(tp->t_ispeed, compatspeeds); |
398 | sg->sg_erase = cc[VERASE]; |
399 | sg->sg_kill = cc[VKILL]; |
400 | sg->sg_flags = tp->t_flags = ttcompatgetflags(tp); |
401 | break; |
402 | } |
403 | case TIOCGETC: |
404 | /* |
405 | * Get the terminal control characters into the struct |
406 | * tchars that 'data' points to. |
407 | */ |
408 | { |
409 | struct tchars *tc = (struct tchars *)data; |
410 | cc_t *cc = tp->t_cc; |
411 | |
412 | tc->t_intrc = cc[VINTR]; |
413 | tc->t_quitc = cc[VQUIT]; |
414 | tc->t_startc = cc[VSTART]; |
415 | tc->t_stopc = cc[VSTOP]; |
416 | tc->t_eofc = cc[VEOF]; |
417 | tc->t_brkc = cc[VEOL]; |
418 | break; |
419 | } |
420 | case TIOCGLTC: |
421 | /* |
422 | * Get the terminal control characters into the struct |
423 | * ltchars that 'data' points to. |
424 | */ |
425 | { |
426 | struct ltchars *ltc = (struct ltchars *)data; |
427 | cc_t *cc = tp->t_cc; |
428 | |
429 | ltc->t_suspc = cc[VSUSP]; |
430 | ltc->t_dsuspc = cc[VDSUSP]; |
431 | ltc->t_rprntc = cc[VREPRINT]; |
432 | ltc->t_flushc = cc[VDISCARD]; |
433 | ltc->t_werasc = cc[VWERASE]; |
434 | ltc->t_lnextc = cc[VLNEXT]; |
435 | break; |
436 | } |
437 | case TIOCLGET: |
438 | /* |
439 | * Get the terminal state local flags word into the 16 bit |
440 | * value pointed to by 'data'. |
441 | */ |
442 | tp->t_flags = |
443 | (ttcompatgetflags(tp) & 0xffff0000UL) |
444 | | (tp->t_flags & 0xffff); |
445 | *(int *)data = tp->t_flags>>16; |
446 | break; |
447 | |
448 | case OTIOCGETD: |
449 | /* |
450 | * Get the current line discipline into the int pointed to |
451 | * by 'data'. |
452 | */ |
453 | *(int *)data = tp->t_line ? tp->t_line : 2; |
454 | break; |
455 | |
456 | case OTIOCSETD: |
457 | /* |
458 | * Set the current line discipline based on the value of the |
459 | * int pointed to by 'data'. |
460 | */ |
461 | { |
462 | int ldisczero = 0; |
463 | |
464 | return (ttioctl_locked(tp, TIOCSETD, |
465 | *(int *)data == 2 ? (caddr_t)&ldisczero : data, flag, p)); |
466 | } |
467 | |
468 | case OTIOCCONS: |
469 | /* |
470 | * Become the console device. |
471 | */ |
472 | *(int *)data = 1; |
473 | return (ttioctl_locked(tp, TIOCCONS, data, flag, p)); |
474 | |
475 | case TIOCGSID: |
476 | /* |
477 | * Get the current session ID (controlling process' PID). |
478 | */ |
479 | if (tp->t_session == NULL) |
480 | return ENOTTY; |
481 | |
482 | if (tp->t_session->s_leader == NULL) |
483 | return ENOTTY; |
484 | |
485 | *(int *) data = tp->t_session->s_leader->p_pid; |
486 | break; |
487 | |
488 | default: |
489 | /* |
490 | * This ioctl is not handled at this layer. |
491 | */ |
492 | return (ENOTTY); |
493 | } |
494 | |
495 | /* |
496 | * Successful 'get' operation. |
497 | */ |
498 | return (0); |
499 | } |
500 | |
501 | /* |
502 | * ttcompatgetflags |
503 | * |
504 | * Description: Get the terminal state local flags, device flags, and current |
505 | * speed code for the device (all 32 bits are returned). |
506 | * |
507 | * Parameters struct tty *tp The tty on which the operation is |
508 | * being performed. |
509 | * |
510 | * Returns: * Integer value corresponding to the |
511 | * current terminal state local flags |
512 | * word. |
513 | * |
514 | * Notes: Caller is responsible for breaking these bits back out into |
515 | * separate 16 bit filelds, if that's what was actually desired. |
516 | */ |
517 | static int |
518 | ttcompatgetflags(struct tty *tp) |
519 | { |
520 | tcflag_t iflag = tp->t_iflag; |
521 | tcflag_t lflag = tp->t_lflag; |
522 | tcflag_t oflag = tp->t_oflag; |
523 | tcflag_t cflag = tp->t_cflag; |
524 | int flags = 0; |
525 | |
526 | if (iflag&IXOFF) |
527 | flags |= TANDEM; |
528 | if (iflag&ICRNL || oflag&ONLCR) |
529 | flags |= CRMOD; |
530 | if ((cflag&CSIZE) == CS8) { |
531 | flags |= PASS8; |
532 | if (iflag&ISTRIP) |
533 | flags |= ANYP; |
534 | } |
535 | else if (cflag&PARENB) { |
536 | if (iflag&INPCK) { |
537 | if (cflag&PARODD) |
538 | flags |= ODDP; |
539 | else |
540 | flags |= EVENP; |
541 | } else |
542 | flags |= EVENP | ODDP; |
543 | } |
544 | |
545 | if ((lflag&ICANON) == 0) { |
546 | /* fudge */ |
547 | if (iflag&(INPCK|ISTRIP|IXON) || lflag&(IEXTEN|ISIG) |
548 | || (cflag&(CSIZE|PARENB)) != CS8) |
549 | flags |= CBREAK; |
550 | else |
551 | flags |= RAW; |
552 | } |
553 | if (!(flags&RAW) && !(oflag&OPOST) && (cflag&(CSIZE|PARENB)) == CS8) |
554 | flags |= LITOUT; |
555 | if (cflag&MDMBUF) |
556 | flags |= MDMBUF; |
557 | if ((cflag&HUPCL) == 0) |
558 | flags |= NOHANG; |
559 | if (oflag&OXTABS) |
560 | flags |= XTABS; |
561 | if (lflag&ECHOE) |
562 | flags |= CRTERA|CRTBS; |
563 | if (lflag&ECHOKE) |
564 | flags |= CRTKIL|CRTBS; |
565 | if (lflag&ECHOPRT) |
566 | flags |= PRTERA; |
567 | if (lflag&ECHOCTL) |
568 | flags |= CTLECH; |
569 | if ((iflag&IXANY) == 0) |
570 | flags |= DECCTQ; |
571 | flags |= lflag&(ECHO|TOSTOP|FLUSHO|PENDIN|NOFLSH); |
572 | return (flags); |
573 | } |
574 | |
575 | /* |
576 | * ttcompatsetflags |
577 | * |
578 | * Description: Given a set of compatability flags, convert the compatability |
579 | * flags in the terminal flags fields into canonical flags in the |
580 | * provided termios struct. |
581 | * |
582 | * Parameters: struct tty *tp The tty on which the operation is |
583 | * being performed. |
584 | * struct termios *t The termios structure into which to |
585 | * return the converted flags. |
586 | * |
587 | * Returns: void (implicit: *t, modified) |
588 | */ |
589 | static void |
590 | ttcompatsetflags(struct tty *tp, struct termios *t) |
591 | { |
592 | int flags = tp->t_flags; |
593 | tcflag_t iflag = t->c_iflag; |
594 | tcflag_t oflag = t->c_oflag; |
595 | tcflag_t lflag = t->c_lflag; |
596 | tcflag_t cflag = t->c_cflag; |
597 | |
598 | if (flags & RAW) { |
599 | iflag = IGNBRK; |
600 | lflag &= ~(ECHOCTL|ISIG|ICANON|IEXTEN); |
601 | } else { |
602 | iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR); |
603 | iflag |= BRKINT|IXON|IMAXBEL; |
604 | lflag |= ISIG|IEXTEN|ECHOCTL; /* XXX was echoctl on ? */ |
605 | if (flags & XTABS) |
606 | oflag |= OXTABS; |
607 | else |
608 | oflag &= ~OXTABS; |
609 | if (flags & CBREAK) |
610 | lflag &= ~ICANON; |
611 | else |
612 | lflag |= ICANON; |
613 | if (flags&CRMOD) { |
614 | iflag |= ICRNL; |
615 | oflag |= ONLCR; |
616 | } else { |
617 | iflag &= ~ICRNL; |
618 | oflag &= ~ONLCR; |
619 | } |
620 | } |
621 | if (flags&ECHO) |
622 | lflag |= ECHO; |
623 | else |
624 | lflag &= ~ECHO; |
625 | |
626 | cflag &= ~(CSIZE|PARENB); |
627 | if (flags&(RAW|LITOUT|PASS8)) { |
628 | cflag |= CS8; |
629 | if (!(flags&(RAW|PASS8)) |
630 | || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP)) |
631 | iflag |= ISTRIP; |
632 | else |
633 | iflag &= ~ISTRIP; |
634 | if (flags&(RAW|LITOUT)) |
635 | oflag &= ~OPOST; |
636 | else |
637 | oflag |= OPOST; |
638 | } else { |
639 | cflag |= CS7|PARENB; |
640 | iflag |= ISTRIP; |
641 | oflag |= OPOST; |
642 | } |
643 | /* XXX don't set INPCK if RAW or PASS8? */ |
644 | if ((flags&(EVENP|ODDP)) == EVENP) { |
645 | iflag |= INPCK; |
646 | cflag &= ~PARODD; |
647 | } else if ((flags&(EVENP|ODDP)) == ODDP) { |
648 | iflag |= INPCK; |
649 | cflag |= PARODD; |
650 | } else |
651 | iflag &= ~INPCK; |
652 | if (flags&TANDEM) |
653 | iflag |= IXOFF; |
654 | else |
655 | iflag &= ~IXOFF; |
656 | if ((flags&DECCTQ) == 0) |
657 | iflag |= IXANY; |
658 | else |
659 | iflag &= ~IXANY; |
660 | t->c_iflag = iflag; |
661 | t->c_oflag = oflag; |
662 | t->c_lflag = lflag; |
663 | t->c_cflag = cflag; |
664 | } |
665 | |
666 | /* |
667 | * ttcompatsetlflags |
668 | * |
669 | * Description: Given a set of compatability terminal state local flags, |
670 | * convert the compatability flags in the terminal flags |
671 | * fields into canonical flags in the provided termios struct. |
672 | * |
673 | * Parameters: struct tty *tp The tty on which the operation is |
674 | * being performed. |
675 | * struct termios *t The termios structure into which to |
676 | * return the converted local flags. |
677 | * |
678 | * Returns: void (implicit: *t, modified) |
679 | */ |
680 | static void |
681 | ttcompatsetlflags(struct tty *tp, struct termios *t) |
682 | { |
683 | int flags = tp->t_flags; |
684 | tcflag_t iflag = t->c_iflag; |
685 | tcflag_t oflag = t->c_oflag; |
686 | tcflag_t lflag = t->c_lflag; |
687 | tcflag_t cflag = t->c_cflag; |
688 | |
689 | iflag &= ~(PARMRK|IGNPAR|IGNCR|INLCR); |
690 | if (flags&CRTERA) |
691 | lflag |= ECHOE; |
692 | else |
693 | lflag &= ~ECHOE; |
694 | if (flags&CRTKIL) |
695 | lflag |= ECHOKE; |
696 | else |
697 | lflag &= ~ECHOKE; |
698 | if (flags&PRTERA) |
699 | lflag |= ECHOPRT; |
700 | else |
701 | lflag &= ~ECHOPRT; |
702 | if (flags&CTLECH) |
703 | lflag |= ECHOCTL; |
704 | else |
705 | lflag &= ~ECHOCTL; |
706 | if (flags&TANDEM) |
707 | iflag |= IXOFF; |
708 | else |
709 | iflag &= ~IXOFF; |
710 | if ((flags&DECCTQ) == 0) |
711 | iflag |= IXANY; |
712 | else |
713 | iflag &= ~IXANY; |
714 | if (flags & MDMBUF) |
715 | cflag |= MDMBUF; |
716 | else |
717 | cflag &= ~MDMBUF; |
718 | if (flags&NOHANG) |
719 | cflag &= ~HUPCL; |
720 | else |
721 | cflag |= HUPCL; |
722 | lflag &= ~(TOSTOP|FLUSHO|PENDIN|NOFLSH); |
723 | lflag |= flags&(TOSTOP|FLUSHO|PENDIN|NOFLSH); |
724 | |
725 | /* |
726 | * The next if-else statement is copied from above so don't bother |
727 | * checking it separately. We could avoid fiddlling with the |
728 | * character size if the mode is already RAW or if neither the |
729 | * LITOUT bit or the PASS8 bit is being changed, but the delta of |
730 | * the change is not available here and skipping the RAW case would |
731 | * make the code different from above. |
732 | */ |
733 | cflag &= ~(CSIZE|PARENB); |
734 | if (flags&(RAW|LITOUT|PASS8)) { |
735 | cflag |= CS8; |
736 | if (!(flags&(RAW|PASS8)) |
737 | || (flags&(RAW|PASS8|ANYP)) == (PASS8|ANYP)) |
738 | iflag |= ISTRIP; |
739 | else |
740 | iflag &= ~ISTRIP; |
741 | if (flags&(RAW|LITOUT)) |
742 | oflag &= ~OPOST; |
743 | else |
744 | oflag |= OPOST; |
745 | } else { |
746 | cflag |= CS7|PARENB; |
747 | iflag |= ISTRIP; |
748 | oflag |= OPOST; |
749 | } |
750 | t->c_iflag = iflag; |
751 | t->c_oflag = oflag; |
752 | t->c_lflag = lflag; |
753 | t->c_cflag = cflag; |
754 | } |
755 | |