1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1991 The Regents of the University of California.
6 * Copyright (c) 1999 Michael Smith
7 * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
8 *
9 * All rights reserved.
10 *
11 * This code is derived from software contributed to Berkeley by
12 * the Systems Programming Group of the University of Utah Computer
13 * Science Department.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40 #include <sys/cdefs.h>
41 #include "opt_ddb.h"
42 #include "opt_syscons.h"
43
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/lock.h>
47 #include <sys/mutex.h>
48 #include <sys/conf.h>
49 #include <sys/cons.h>
50 #include <sys/fcntl.h>
51 #include <sys/kbio.h>
52 #include <sys/kdb.h>
53 #include <sys/kernel.h>
54 #include <sys/malloc.h>
55 #include <sys/msgbuf.h>
56 #include <sys/namei.h>
57 #include <sys/priv.h>
58 #include <sys/proc.h>
59 #include <sys/queue.h>
60 #include <sys/reboot.h>
61 #include <sys/sysctl.h>
62 #include <sys/sbuf.h>
63 #include <sys/tslog.h>
64 #include <sys/tty.h>
65 #include <sys/uio.h>
66 #include <sys/vnode.h>
67
68 #include <ddb/ddb.h>
69
70 #include <dev/kbd/kbdreg.h>
71
72 #include <machine/cpu.h>
73 #include <machine/clock.h>
74
75 /*
76 * Check for 'options EARLY_PRINTF' that may have been used in old kernel
77 * config files. If you are hitting this error you should update your
78 * config to use 'options EARLY_PRINTF=<device name>', e.g. with the
79 * Arm pl011 use:
80 *
81 * options EARLY_PRINTF=pl011
82 */
83 #if CHECK_EARLY_PRINTF(1)
84 #error Update your config to use 'options EARLY_PRINTF=<device name>'
85 #endif
86
87 static MALLOC_DEFINE(M_TTYCONS, "tty console", "tty console handling");
88
89 struct cn_device {
90 STAILQ_ENTRY(cn_device) cnd_next;
91 struct consdev *cnd_cn;
92 };
93
94 #define CNDEVPATHMAX 32
95 #define CNDEVTAB_SIZE 4
96 static struct cn_device cn_devtab[CNDEVTAB_SIZE];
97 static STAILQ_HEAD(, cn_device) cn_devlist =
98 STAILQ_HEAD_INITIALIZER(cn_devlist);
99
100 int cons_avail_mask = 0; /* Bit mask. Each registered low level console
101 * which is currently unavailable for inpit
102 * (i.e., if it is in graphics mode) will have
103 * this bit cleared.
104 */
105
106 int cn_mute;
107 SYSCTL_INT(_kern, OID_AUTO, consmute, CTLFLAG_RW, &cn_mute, 0,
108 "State of the console muting");
109
110 static char *consbuf; /* buffer used by `consmsgbuf' */
111 static struct callout conscallout; /* callout for outputting to constty */
112 struct msgbuf consmsgbuf; /* message buffer for console tty */
113 static bool console_pausing; /* pause after each line during probe */
114 static const char console_pausestr[] =
115 "<pause; press any key to proceed to next line or '.' to end pause mode>";
116 struct tty *constty; /* pointer to console "window" tty */
117 static struct mtx constty_mtx; /* Mutex for constty assignment. */
118 MTX_SYSINIT(constty_mtx, &constty_mtx, "constty_mtx", MTX_DEF);
119 static struct mtx cnputs_mtx; /* Mutex for cnputs(). */
120 MTX_SYSINIT(cnputs_mtx, &cnputs_mtx, "cnputs_mtx", MTX_SPIN | MTX_NOWITNESS);
121
122 static void constty_timeout(void *arg);
123
124 static struct consdev cons_consdev;
125 DATA_SET(cons_set, cons_consdev);
126 SET_DECLARE(cons_set, struct consdev);
127
128 /*
129 * Stub for configurations that don't actually have a keyboard driver. Inclusion
130 * of kbd.c is contingent on any number of keyboard/console drivers being
131 * present in the kernel; rather than trying to catch them all, we'll just
132 * maintain this weak kbdinit that will be overridden by the strong version in
133 * kbd.c if it's present.
134 */
135 __weak_symbol void
kbdinit(void)136 kbdinit(void)
137 {
138
139 }
140
141 static void
mute_console(void * data __unused)142 mute_console(void *data __unused)
143 {
144
145 if ((boothowto & (RB_MUTEMSGS | RB_VERBOSE)) == RB_MUTEMSGS) {
146 printf("-- Muting boot messages --\n");
147 cn_mute = 1;
148 }
149 }
150
151 SYSINIT(mute_console, SI_SUB_COPYRIGHT, SI_ORDER_ANY, mute_console, NULL);
152
153 void
cninit(void)154 cninit(void)
155 {
156 struct consdev *best_cn, *cn, **list;
157
158 TSENTER();
159 /*
160 * Check if we should mute the console (for security reasons perhaps)
161 * It can be changes dynamically using sysctl kern.consmute
162 * once we are up and going.
163 *
164 */
165 cn_mute = ((boothowto & (RB_MUTE
166 |RB_SINGLE
167 |RB_VERBOSE
168 |RB_ASKNAME)) == RB_MUTE);
169
170 /*
171 * Bring up the kbd layer just in time for cnprobe. Console drivers
172 * have a dependency on kbd being ready, so this fits nicely between the
173 * machdep callers of cninit() and MI probing/initialization of consoles
174 * here.
175 */
176 kbdinit();
177
178 /*
179 * Find the first console with the highest priority.
180 */
181 best_cn = NULL;
182 SET_FOREACH(list, cons_set) {
183 cn = *list;
184 cnremove(cn);
185 /* Skip cons_consdev. */
186 if (cn->cn_ops == NULL)
187 continue;
188 cn->cn_ops->cn_probe(cn);
189 if (cn->cn_pri == CN_DEAD)
190 continue;
191 if (best_cn == NULL || cn->cn_pri > best_cn->cn_pri)
192 best_cn = cn;
193 if (boothowto & RB_MULTIPLE) {
194 /*
195 * Initialize console, and attach to it.
196 */
197 cn->cn_ops->cn_init(cn);
198 cnadd(cn);
199 }
200 }
201 if (best_cn == NULL)
202 return;
203 if ((boothowto & RB_MULTIPLE) == 0) {
204 best_cn->cn_ops->cn_init(best_cn);
205 cnadd(best_cn);
206 }
207 if (boothowto & RB_PAUSE)
208 console_pausing = true;
209 /*
210 * Make the best console the preferred console.
211 */
212 cnselect(best_cn);
213
214 #ifdef EARLY_PRINTF
215 /*
216 * Release early console.
217 */
218 early_putc = NULL;
219 #endif
220 TSEXIT();
221 }
222
223 void
cninit_finish(void)224 cninit_finish(void)
225 {
226 console_pausing = false;
227 }
228
229 /* add a new physical console to back the virtual console */
230 int
cnadd(struct consdev * cn)231 cnadd(struct consdev *cn)
232 {
233 struct cn_device *cnd;
234 int i;
235
236 STAILQ_FOREACH(cnd, &cn_devlist, cnd_next)
237 if (cnd->cnd_cn == cn)
238 return (0);
239 for (i = 0; i < CNDEVTAB_SIZE; i++) {
240 cnd = &cn_devtab[i];
241 if (cnd->cnd_cn == NULL)
242 break;
243 }
244 if (cnd->cnd_cn != NULL)
245 return (ENOMEM);
246 cnd->cnd_cn = cn;
247 if (cn->cn_name[0] == '\0') {
248 /* XXX: it is unclear if/where this print might output */
249 printf("WARNING: console at %p has no name\n", cn);
250 }
251 STAILQ_INSERT_TAIL(&cn_devlist, cnd, cnd_next);
252 if (STAILQ_FIRST(&cn_devlist) == cnd)
253 ttyconsdev_select(cnd->cnd_cn->cn_name);
254
255 /* Add device to the active mask. */
256 cnavailable(cn, (cn->cn_flags & CN_FLAG_NOAVAIL) == 0);
257
258 return (0);
259 }
260
261 void
cnremove(struct consdev * cn)262 cnremove(struct consdev *cn)
263 {
264 struct cn_device *cnd;
265 int i;
266
267 STAILQ_FOREACH(cnd, &cn_devlist, cnd_next) {
268 if (cnd->cnd_cn != cn)
269 continue;
270 if (STAILQ_FIRST(&cn_devlist) == cnd)
271 ttyconsdev_select(NULL);
272 STAILQ_REMOVE(&cn_devlist, cnd, cn_device, cnd_next);
273 cnd->cnd_cn = NULL;
274
275 /* Remove this device from available mask. */
276 for (i = 0; i < CNDEVTAB_SIZE; i++)
277 if (cnd == &cn_devtab[i]) {
278 cons_avail_mask &= ~(1 << i);
279 break;
280 }
281 #if 0
282 /*
283 * XXX
284 * syscons gets really confused if console resources are
285 * freed after the system has initialized.
286 */
287 if (cn->cn_term != NULL)
288 cn->cn_ops->cn_term(cn);
289 #endif
290 return;
291 }
292 }
293
294 void
cnselect(struct consdev * cn)295 cnselect(struct consdev *cn)
296 {
297 struct cn_device *cnd;
298
299 STAILQ_FOREACH(cnd, &cn_devlist, cnd_next) {
300 if (cnd->cnd_cn != cn)
301 continue;
302 if (cnd == STAILQ_FIRST(&cn_devlist))
303 return;
304 STAILQ_REMOVE(&cn_devlist, cnd, cn_device, cnd_next);
305 STAILQ_INSERT_HEAD(&cn_devlist, cnd, cnd_next);
306 ttyconsdev_select(cnd->cnd_cn->cn_name);
307 return;
308 }
309 }
310
311 void
cnavailable(struct consdev * cn,int available)312 cnavailable(struct consdev *cn, int available)
313 {
314 int i;
315
316 for (i = 0; i < CNDEVTAB_SIZE; i++) {
317 if (cn_devtab[i].cnd_cn == cn)
318 break;
319 }
320 if (available) {
321 if (i < CNDEVTAB_SIZE)
322 cons_avail_mask |= (1 << i);
323 cn->cn_flags &= ~CN_FLAG_NOAVAIL;
324 } else {
325 if (i < CNDEVTAB_SIZE)
326 cons_avail_mask &= ~(1 << i);
327 cn->cn_flags |= CN_FLAG_NOAVAIL;
328 }
329 }
330
331 int
cnunavailable(void)332 cnunavailable(void)
333 {
334
335 return (cons_avail_mask == 0);
336 }
337
338 /*
339 * sysctl_kern_console() provides output parseable in conscontrol(1).
340 */
341 static int
sysctl_kern_console(SYSCTL_HANDLER_ARGS)342 sysctl_kern_console(SYSCTL_HANDLER_ARGS)
343 {
344 struct cn_device *cnd;
345 struct consdev *cp, **list;
346 char *p;
347 bool delete;
348 int error;
349 struct sbuf *sb;
350
351 sb = sbuf_new(NULL, NULL, CNDEVPATHMAX * 2, SBUF_AUTOEXTEND |
352 SBUF_INCLUDENUL);
353 if (sb == NULL)
354 return (ENOMEM);
355 sbuf_clear(sb);
356 STAILQ_FOREACH(cnd, &cn_devlist, cnd_next)
357 sbuf_printf(sb, "%s,", cnd->cnd_cn->cn_name);
358 sbuf_putc(sb, '/');
359 SET_FOREACH(list, cons_set) {
360 cp = *list;
361 if (cp->cn_name[0] != '\0')
362 sbuf_printf(sb, "%s,", cp->cn_name);
363 }
364 sbuf_finish(sb);
365 error = sysctl_handle_string(oidp, sbuf_data(sb), sbuf_len(sb), req);
366 if (error == 0 && req->newptr != NULL) {
367 p = sbuf_data(sb);
368 error = ENXIO;
369 delete = false;
370 if (*p == '-') {
371 delete = true;
372 p++;
373 }
374 SET_FOREACH(list, cons_set) {
375 cp = *list;
376 if (strcmp(p, cp->cn_name) != 0)
377 continue;
378 if (delete) {
379 cnremove(cp);
380 error = 0;
381 } else {
382 error = cnadd(cp);
383 if (error == 0)
384 cnselect(cp);
385 }
386 break;
387 }
388 }
389 sbuf_delete(sb);
390 return (error);
391 }
392
393 SYSCTL_PROC(_kern, OID_AUTO, console,
394 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 0, 0,
395 sysctl_kern_console, "A",
396 "Console device control");
397
398 void
cngrab(void)399 cngrab(void)
400 {
401 struct cn_device *cnd;
402 struct consdev *cn;
403
404 STAILQ_FOREACH(cnd, &cn_devlist, cnd_next) {
405 cn = cnd->cnd_cn;
406 if (!kdb_active || !(cn->cn_flags & CN_FLAG_NODEBUG))
407 cn->cn_ops->cn_grab(cn);
408 }
409 }
410
411 void
cnungrab(void)412 cnungrab(void)
413 {
414 struct cn_device *cnd;
415 struct consdev *cn;
416
417 STAILQ_FOREACH(cnd, &cn_devlist, cnd_next) {
418 cn = cnd->cnd_cn;
419 if (!kdb_active || !(cn->cn_flags & CN_FLAG_NODEBUG))
420 cn->cn_ops->cn_ungrab(cn);
421 }
422 }
423
424 void
cnresume(void)425 cnresume(void)
426 {
427 struct cn_device *cnd;
428 struct consdev *cn;
429
430 STAILQ_FOREACH(cnd, &cn_devlist, cnd_next) {
431 cn = cnd->cnd_cn;
432 if (cn->cn_ops->cn_resume != NULL)
433 cn->cn_ops->cn_resume(cn);
434 }
435 }
436
437 /*
438 * Low level console routines.
439 */
440 int
cngetc(void)441 cngetc(void)
442 {
443 int c;
444
445 if (cn_mute)
446 return (-1);
447 while ((c = cncheckc()) == -1)
448 cpu_spinwait();
449 if (c == '\r')
450 c = '\n'; /* console input is always ICRNL */
451 return (c);
452 }
453
454 int
cncheckc(void)455 cncheckc(void)
456 {
457 struct cn_device *cnd;
458 struct consdev *cn;
459 int c;
460
461 if (cn_mute)
462 return (-1);
463 STAILQ_FOREACH(cnd, &cn_devlist, cnd_next) {
464 cn = cnd->cnd_cn;
465 if (!kdb_active || !(cn->cn_flags & CN_FLAG_NODEBUG)) {
466 c = cn->cn_ops->cn_getc(cn);
467 if (c != -1)
468 return (c);
469 }
470 }
471 return (-1);
472 }
473
474 void
cngets(char * cp,size_t size,int visible)475 cngets(char *cp, size_t size, int visible)
476 {
477 char *lp, *end;
478 int c;
479
480 cngrab();
481
482 lp = cp;
483 end = cp + size - 1;
484 for (;;) {
485 c = cngetc() & 0177;
486 switch (c) {
487 case '\n':
488 case '\r':
489 cnputc(c);
490 *lp = '\0';
491 cnungrab();
492 return;
493 case '\b':
494 case '\177':
495 if (lp > cp) {
496 if (visible)
497 cnputs("\b \b");
498 lp--;
499 }
500 continue;
501 case '\0':
502 continue;
503 default:
504 if (lp < end) {
505 switch (visible) {
506 case GETS_NOECHO:
507 break;
508 case GETS_ECHOPASS:
509 cnputc('*');
510 break;
511 default:
512 cnputc(c);
513 break;
514 }
515 *lp++ = c;
516 }
517 }
518 }
519 }
520
521 void
cnputc(int c)522 cnputc(int c)
523 {
524 struct cn_device *cnd;
525 struct consdev *cn;
526 const char *cp;
527
528 #ifdef EARLY_PRINTF
529 if (early_putc != NULL) {
530 if (c == '\n')
531 early_putc('\r');
532 early_putc(c);
533 return;
534 }
535 #endif
536
537 if (cn_mute || c == '\0')
538 return;
539 STAILQ_FOREACH(cnd, &cn_devlist, cnd_next) {
540 cn = cnd->cnd_cn;
541 if (!kdb_active || !(cn->cn_flags & CN_FLAG_NODEBUG)) {
542 if (c == '\n')
543 cn->cn_ops->cn_putc(cn, '\r');
544 cn->cn_ops->cn_putc(cn, c);
545 }
546 }
547 if (console_pausing && c == '\n' && !kdb_active) {
548 for (cp = console_pausestr; *cp != '\0'; cp++)
549 cnputc(*cp);
550 cngrab();
551 if (cngetc() == '.')
552 console_pausing = false;
553 cnungrab();
554 cnputc('\r');
555 for (cp = console_pausestr; *cp != '\0'; cp++)
556 cnputc(' ');
557 cnputc('\r');
558 }
559 }
560
561 void
cnputsn(const char * p,size_t n)562 cnputsn(const char *p, size_t n)
563 {
564 size_t i;
565 bool unlock_reqd = false;
566
567 if (mtx_initialized(&cnputs_mtx)) {
568 /*
569 * NOTE: Debug prints and/or witness printouts in
570 * console driver clients can cause the "cnputs_mtx"
571 * mutex to recurse. Simply return if that happens.
572 */
573 if (mtx_owned(&cnputs_mtx))
574 return;
575 mtx_lock_spin(&cnputs_mtx);
576 unlock_reqd = true;
577 }
578
579 for (i = 0; i < n; i++)
580 cnputc(p[i]);
581
582 if (unlock_reqd)
583 mtx_unlock_spin(&cnputs_mtx);
584 }
585
586 void
cnputs(const char * p)587 cnputs(const char *p)
588 {
589 cnputsn(p, strlen(p));
590 }
591
592 static unsigned int consmsgbuf_size = 65536;
593 SYSCTL_UINT(_kern, OID_AUTO, consmsgbuf_size, CTLFLAG_RWTUN, &consmsgbuf_size,
594 0, "Console tty buffer size");
595
596 /*
597 * Redirect console output to a tty.
598 */
599 int
constty_set(struct tty * tp)600 constty_set(struct tty *tp)
601 {
602 int size = consmsgbuf_size;
603 void *buf = NULL;
604
605 tty_assert_locked(tp);
606 if (constty == tp)
607 return (0);
608 if (constty != NULL)
609 return (EBUSY);
610
611 if (consbuf == NULL) {
612 tty_unlock(tp);
613 buf = malloc(size, M_TTYCONS, M_WAITOK);
614 tty_lock(tp);
615 }
616 mtx_lock(&constty_mtx);
617 if (constty != NULL) {
618 mtx_unlock(&constty_mtx);
619 free(buf, M_TTYCONS);
620 return (EBUSY);
621 }
622 if (consbuf == NULL) {
623 consbuf = buf;
624 msgbuf_init(&consmsgbuf, buf, size);
625 } else
626 free(buf, M_TTYCONS);
627 constty = tp;
628 mtx_unlock(&constty_mtx);
629
630 callout_init_mtx(&conscallout, tty_getlock(tp), 0);
631 constty_timeout(tp);
632 return (0);
633 }
634
635 /*
636 * Disable console redirection to a tty.
637 */
638 int
constty_clear(struct tty * tp)639 constty_clear(struct tty *tp)
640 {
641 int c;
642
643 tty_assert_locked(tp);
644 if (constty != tp)
645 return (ENXIO);
646 callout_stop(&conscallout);
647 mtx_lock(&constty_mtx);
648 constty = NULL;
649 mtx_unlock(&constty_mtx);
650 while ((c = msgbuf_getchar(&consmsgbuf)) != -1)
651 cnputc(c);
652 /* We never free consbuf because it can still be in use. */
653 return (0);
654 }
655
656 /* Times per second to check for pending console tty messages. */
657 static int constty_wakeups_per_second = 15;
658 SYSCTL_INT(_kern, OID_AUTO, constty_wakeups_per_second, CTLFLAG_RW,
659 &constty_wakeups_per_second, 0,
660 "Times per second to check for pending console tty messages");
661
662 static void
constty_timeout(void * arg)663 constty_timeout(void *arg)
664 {
665 struct tty *tp = arg;
666 int c;
667
668 tty_assert_locked(tp);
669 while ((c = msgbuf_getchar(&consmsgbuf)) != -1) {
670 if (tty_putchar(tp, c) < 0) {
671 constty_clear(tp);
672 return;
673 }
674 }
675 callout_reset_sbt(&conscallout, SBT_1S / constty_wakeups_per_second,
676 0, constty_timeout, tp, C_PREL(1));
677 }
678
679 /*
680 * Sysbeep(), if we have hardware for it
681 */
682
683 #ifdef HAS_TIMER_SPKR
684
685 static bool beeping;
686 static struct callout beeping_timer;
687
688 static void
sysbeepstop(void * chan)689 sysbeepstop(void *chan)
690 {
691
692 timer_spkr_release();
693 beeping = false;
694 }
695
696 int
sysbeep(int pitch,sbintime_t duration)697 sysbeep(int pitch, sbintime_t duration)
698 {
699
700 if (timer_spkr_acquire()) {
701 if (!beeping) {
702 /* Something else owns it. */
703 return (EBUSY);
704 }
705 }
706 timer_spkr_setfreq(pitch);
707 if (!beeping) {
708 beeping = true;
709 callout_reset_sbt(&beeping_timer, duration, 0, sysbeepstop,
710 NULL, C_PREL(5));
711 }
712 return (0);
713 }
714
715 static void
sysbeep_init(void * unused)716 sysbeep_init(void *unused)
717 {
718
719 callout_init(&beeping_timer, 1);
720 }
721 SYSINIT(sysbeep, SI_SUB_SOFTINTR, SI_ORDER_ANY, sysbeep_init, NULL);
722 #else
723
724 /*
725 * No hardware, no sound
726 */
727
728 int
sysbeep(int pitch __unused,sbintime_t duration __unused)729 sysbeep(int pitch __unused, sbintime_t duration __unused)
730 {
731
732 return (ENODEV);
733 }
734
735 #endif
736
737 /*
738 * Temporary support for sc(4) to vt(4) transition.
739 */
740 static char vty_name[16];
741 SYSCTL_STRING(_kern, OID_AUTO, vty, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, vty_name,
742 0, "Console vty driver");
743
744 int
vty_enabled(unsigned vty)745 vty_enabled(unsigned vty)
746 {
747 static unsigned vty_selected = 0;
748
749 if (vty_selected == 0) {
750 TUNABLE_STR_FETCH("kern.vty", vty_name, sizeof(vty_name));
751 do {
752 #if defined(DEV_SC)
753 if (strcmp(vty_name, "sc") == 0) {
754 vty_selected = VTY_SC;
755 break;
756 }
757 #endif
758 #if defined(DEV_VT)
759 if (strcmp(vty_name, "vt") == 0) {
760 vty_selected = VTY_VT;
761 break;
762 }
763 #endif
764 #if defined(DEV_VT)
765 vty_selected = VTY_VT;
766 #elif defined(DEV_SC)
767 vty_selected = VTY_SC;
768 #endif
769 } while (0);
770
771 if (vty_selected == VTY_VT)
772 strcpy(vty_name, "vt");
773 else if (vty_selected == VTY_SC)
774 strcpy(vty_name, "sc");
775 }
776 return ((vty_selected & vty) != 0);
777 }
778