1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 #if 0
32 static char sccsid[] = "@(#)from: subr.c 8.1 (Berkeley) 6/4/93";
33 #endif
34 static const char rcsid[] =
35 "$FreeBSD$";
36 #endif /* not lint */
37
38 /*
39 * Melbourne getty.
40 */
41 #include <stdlib.h>
42 #include <string.h>
43 #include <termios.h>
44 #include <unistd.h>
45 #include <sys/ioctl.h>
46 #include <sys/param.h>
47 #include <sys/time.h>
48 #include <syslog.h>
49
50 #include "gettytab.h"
51 #include "pathnames.h"
52 #include "extern.h"
53
54
55
56 /*
57 * Get a table entry.
58 */
59 void
gettable(const char * name,char * buf)60 gettable(const char *name, char *buf)
61 {
62 struct gettystrs *sp;
63 struct gettynums *np;
64 struct gettyflags *fp;
65 long n;
66 int l;
67 char *p;
68 char *msg = NULL;
69 const char *dba[2];
70
71 static int firsttime = 1;
72
73 dba[0] = _PATH_GETTYTAB;
74 dba[1] = 0;
75
76 if (firsttime) {
77 /*
78 * we need to strdup() anything in the strings array
79 * initially in order to simplify things later
80 */
81 for (sp = gettystrs; sp->field; sp++)
82 if (sp->value != NULL) {
83 /* handle these ones more carefully */
84 if (sp >= &gettystrs[4] && sp <= &gettystrs[6])
85 l = 2;
86 else
87 l = strlen(sp->value) + 1;
88 if ((p = malloc(l)) != NULL) {
89 strncpy(p, sp->value, l);
90 p[l-1] = '\0';
91 }
92 /*
93 * replace, even if NULL, else we'll
94 * have problems with free()ing static mem
95 */
96 sp->value = p;
97 }
98 firsttime = 0;
99 }
100
101 switch (cgetent(&buf, (char **)dba, (char *)name)) {
102 case 1:
103 msg = "%s: couldn't resolve 'tc=' in gettytab '%s'";
104 case 0:
105 break;
106 case -1:
107 msg = "%s: unknown gettytab entry '%s'";
108 break;
109 case -2:
110 msg = "%s: retrieving gettytab entry '%s': %m";
111 break;
112 case -3:
113 msg = "%s: recursive 'tc=' reference gettytab entry '%s'";
114 break;
115 default:
116 msg = "%s: unexpected cgetent() error for entry '%s'";
117 break;
118 }
119
120 if (msg != NULL) {
121 syslog(LOG_ERR, msg, "getty", name);
122 return;
123 }
124
125 for (sp = gettystrs; sp->field; sp++) {
126 if ((l = cgetstr(buf, (char*)sp->field, &p)) >= 0) {
127 if (sp->value) {
128 /* prefer existing value */
129 if (strcmp(p, sp->value) != 0)
130 free(sp->value);
131 else {
132 free(p);
133 p = sp->value;
134 }
135 }
136 sp->value = p;
137 } else if (l == -1) {
138 free(sp->value);
139 sp->value = NULL;
140 }
141 }
142
143 for (np = gettynums; np->field; np++) {
144 if (cgetnum(buf, (char*)np->field, &n) == -1)
145 np->set = 0;
146 else {
147 np->set = 1;
148 np->value = n;
149 }
150 }
151
152 for (fp = gettyflags; fp->field; fp++) {
153 if (cgetcap(buf, (char *)fp->field, ':') == NULL)
154 fp->set = 0;
155 else {
156 fp->set = 1;
157 fp->value = 1 ^ fp->invrt;
158 }
159 }
160 }
161
162 void
gendefaults(void)163 gendefaults(void)
164 {
165 struct gettystrs *sp;
166 struct gettynums *np;
167 struct gettyflags *fp;
168
169 for (sp = gettystrs; sp->field; sp++)
170 if (sp->value)
171 sp->defalt = strdup(sp->value);
172 for (np = gettynums; np->field; np++)
173 if (np->set)
174 np->defalt = np->value;
175 for (fp = gettyflags; fp->field; fp++)
176 if (fp->set)
177 fp->defalt = fp->value;
178 else
179 fp->defalt = fp->invrt;
180 }
181
182 void
setdefaults(void)183 setdefaults(void)
184 {
185 struct gettystrs *sp;
186 struct gettynums *np;
187 struct gettyflags *fp;
188
189 for (sp = gettystrs; sp->field; sp++)
190 if (!sp->value)
191 sp->value = !sp->defalt ? sp->defalt
192 : strdup(sp->defalt);
193 for (np = gettynums; np->field; np++)
194 if (!np->set)
195 np->value = np->defalt;
196 for (fp = gettyflags; fp->field; fp++)
197 if (!fp->set)
198 fp->value = fp->defalt;
199 }
200
201 static char **
202 charnames[] = {
203 &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK,
204 &SU, &DS, &RP, &FL, &WE, &LN, 0
205 };
206
207 static char *
208 charvars[] = {
209 &tmode.c_cc[VERASE], &tmode.c_cc[VKILL], &tmode.c_cc[VINTR],
210 &tmode.c_cc[VQUIT], &tmode.c_cc[VSTART], &tmode.c_cc[VSTOP],
211 &tmode.c_cc[VEOF], &tmode.c_cc[VEOL], &tmode.c_cc[VSUSP],
212 &tmode.c_cc[VDSUSP], &tmode.c_cc[VREPRINT], &tmode.c_cc[VDISCARD],
213 &tmode.c_cc[VWERASE], &tmode.c_cc[VLNEXT], 0
214 };
215
216 void
setchars(void)217 setchars(void)
218 {
219 int i;
220 const char *p;
221
222 for (i = 0; charnames[i]; i++) {
223 p = *charnames[i];
224 if (p && *p)
225 *charvars[i] = *p;
226 else
227 *charvars[i] = _POSIX_VDISABLE;
228 }
229 }
230
231 /* Macros to clear/set/test flags. */
232 #define SET(t, f) (t) |= (f)
233 #define CLR(t, f) (t) &= ~(f)
234 #define ISSET(t, f) ((t) & (f))
235
236 void
set_flags(int n)237 set_flags(int n)
238 {
239 tcflag_t iflag, oflag, cflag, lflag;
240
241
242 switch (n) {
243 case 0:
244 if (C0set && I0set && L0set && O0set) {
245 tmode.c_cflag = C0;
246 tmode.c_iflag = I0;
247 tmode.c_lflag = L0;
248 tmode.c_oflag = O0;
249 return;
250 }
251 break;
252 case 1:
253 if (C1set && I1set && L1set && O1set) {
254 tmode.c_cflag = C1;
255 tmode.c_iflag = I1;
256 tmode.c_lflag = L1;
257 tmode.c_oflag = O1;
258 return;
259 }
260 break;
261 default:
262 if (C2set && I2set && L2set && O2set) {
263 tmode.c_cflag = C2;
264 tmode.c_iflag = I2;
265 tmode.c_lflag = L2;
266 tmode.c_oflag = O2;
267 return;
268 }
269 break;
270 }
271
272 iflag = omode.c_iflag;
273 oflag = omode.c_oflag;
274 cflag = omode.c_cflag;
275 lflag = omode.c_lflag;
276
277 if (NP) {
278 CLR(cflag, CSIZE|PARENB);
279 SET(cflag, CS8);
280 CLR(iflag, ISTRIP|INPCK|IGNPAR);
281 } else if (AP || EP || OP) {
282 CLR(cflag, CSIZE);
283 SET(cflag, CS7|PARENB);
284 SET(iflag, ISTRIP);
285 if (OP && !EP) {
286 SET(iflag, INPCK|IGNPAR);
287 SET(cflag, PARODD);
288 if (AP)
289 CLR(iflag, INPCK);
290 } else if (EP && !OP) {
291 SET(iflag, INPCK|IGNPAR);
292 CLR(cflag, PARODD);
293 if (AP)
294 CLR(iflag, INPCK);
295 } else if (AP || (EP && OP)) {
296 CLR(iflag, INPCK|IGNPAR);
297 CLR(cflag, PARODD);
298 }
299 } /* else, leave as is */
300
301 #if 0
302 if (UC)
303 f |= LCASE;
304 #endif
305
306 if (HC)
307 SET(cflag, HUPCL);
308 else
309 CLR(cflag, HUPCL);
310
311 if (MB)
312 SET(cflag, MDMBUF);
313 else
314 CLR(cflag, MDMBUF);
315
316 if (HW)
317 SET(cflag, CRTSCTS);
318 else
319 CLR(cflag, CRTSCTS);
320
321 if (NL) {
322 SET(iflag, ICRNL);
323 SET(oflag, ONLCR|OPOST);
324 } else {
325 CLR(iflag, ICRNL);
326 CLR(oflag, ONLCR);
327 }
328
329 if (!HT)
330 SET(oflag, OXTABS|OPOST);
331 else
332 CLR(oflag, OXTABS);
333
334 #ifdef XXX_DELAY
335 SET(f, delaybits());
336 #endif
337
338 if (n == 1) { /* read mode flags */
339 if (RW) {
340 iflag = 0;
341 CLR(oflag, OPOST);
342 CLR(cflag, CSIZE|PARENB);
343 SET(cflag, CS8);
344 lflag = 0;
345 } else {
346 CLR(lflag, ICANON);
347 }
348 goto out;
349 }
350
351 if (n == 0)
352 goto out;
353
354 #if 0
355 if (CB)
356 SET(f, CRTBS);
357 #endif
358
359 if (CE)
360 SET(lflag, ECHOE);
361 else
362 CLR(lflag, ECHOE);
363
364 if (CK)
365 SET(lflag, ECHOKE);
366 else
367 CLR(lflag, ECHOKE);
368
369 if (PE)
370 SET(lflag, ECHOPRT);
371 else
372 CLR(lflag, ECHOPRT);
373
374 if (EC)
375 SET(lflag, ECHO);
376 else
377 CLR(lflag, ECHO);
378
379 if (XC)
380 SET(lflag, ECHOCTL);
381 else
382 CLR(lflag, ECHOCTL);
383
384 if (DX)
385 SET(lflag, IXANY);
386 else
387 CLR(lflag, IXANY);
388
389 out:
390 tmode.c_iflag = iflag;
391 tmode.c_oflag = oflag;
392 tmode.c_cflag = cflag;
393 tmode.c_lflag = lflag;
394 }
395
396
397 #ifdef XXX_DELAY
398 struct delayval {
399 unsigned delay; /* delay in ms */
400 int bits;
401 };
402
403 /*
404 * below are random guesses, I can't be bothered checking
405 */
406
407 struct delayval crdelay[] = {
408 { 1, CR1 },
409 { 2, CR2 },
410 { 3, CR3 },
411 { 83, CR1 },
412 { 166, CR2 },
413 { 0, CR3 },
414 };
415
416 struct delayval nldelay[] = {
417 { 1, NL1 }, /* special, calculated */
418 { 2, NL2 },
419 { 3, NL3 },
420 { 100, NL2 },
421 { 0, NL3 },
422 };
423
424 struct delayval bsdelay[] = {
425 { 1, BS1 },
426 { 0, 0 },
427 };
428
429 struct delayval ffdelay[] = {
430 { 1, FF1 },
431 { 1750, FF1 },
432 { 0, FF1 },
433 };
434
435 struct delayval tbdelay[] = {
436 { 1, TAB1 },
437 { 2, TAB2 },
438 { 3, XTABS }, /* this is expand tabs */
439 { 100, TAB1 },
440 { 0, TAB2 },
441 };
442
443 int
delaybits(void)444 delaybits(void)
445 {
446 int f;
447
448 f = adelay(CD, crdelay);
449 f |= adelay(ND, nldelay);
450 f |= adelay(FD, ffdelay);
451 f |= adelay(TD, tbdelay);
452 f |= adelay(BD, bsdelay);
453 return (f);
454 }
455
456 int
adelay(int ms,struct delayval * dp)457 adelay(int ms, struct delayval *dp)
458 {
459 if (ms == 0)
460 return (0);
461 while (dp->delay && ms > dp->delay)
462 dp++;
463 return (dp->bits);
464 }
465 #endif
466
467 char editedhost[MAXHOSTNAMELEN];
468
469 void
edithost(const char * pat)470 edithost(const char *pat)
471 {
472 const char *host = HN;
473 char *res = editedhost;
474
475 if (!pat)
476 pat = "";
477 while (*pat) {
478 switch (*pat) {
479
480 case '#':
481 if (*host)
482 host++;
483 break;
484
485 case '@':
486 if (*host)
487 *res++ = *host++;
488 break;
489
490 default:
491 *res++ = *pat;
492 break;
493
494 }
495 if (res == &editedhost[sizeof editedhost - 1]) {
496 *res = '\0';
497 return;
498 }
499 pat++;
500 }
501 if (*host)
502 strncpy(res, host, sizeof editedhost - (res - editedhost) - 1);
503 else
504 *res = '\0';
505 editedhost[sizeof editedhost - 1] = '\0';
506 }
507
508 static struct speedtab {
509 int speed;
510 int uxname;
511 } speedtab[] = {
512 { 50, B50 },
513 { 75, B75 },
514 { 110, B110 },
515 { 134, B134 },
516 { 150, B150 },
517 { 200, B200 },
518 { 300, B300 },
519 { 600, B600 },
520 { 1200, B1200 },
521 { 1800, B1800 },
522 { 2400, B2400 },
523 { 4800, B4800 },
524 { 9600, B9600 },
525 { 19200, EXTA },
526 { 19, EXTA }, /* for people who say 19.2K */
527 { 38400, EXTB },
528 { 38, EXTB },
529 { 7200, EXTB }, /* alternative */
530 { 57600, B57600 },
531 { 115200, B115200 },
532 { 230400, B230400 },
533 { 0 }
534 };
535
536 int
speed(int val)537 speed(int val)
538 {
539 struct speedtab *sp;
540
541 if (val <= B230400)
542 return (val);
543
544 for (sp = speedtab; sp->speed; sp++)
545 if (sp->speed == val)
546 return (sp->uxname);
547
548 return (B300); /* default in impossible cases */
549 }
550
551 void
makeenv(char * env[])552 makeenv(char *env[])
553 {
554 static char termbuf[128] = "TERM=";
555 char *p, *q;
556 char **ep;
557
558 ep = env;
559 if (TT && *TT) {
560 strlcat(termbuf, TT, sizeof(termbuf));
561 *ep++ = termbuf;
562 }
563 if ((p = EV)) {
564 q = p;
565 while ((q = strchr(q, ','))) {
566 *q++ = '\0';
567 *ep++ = p;
568 p = q;
569 }
570 if (*p)
571 *ep++ = p;
572 }
573 *ep = (char *)0;
574 }
575
576 /*
577 * This speed select mechanism is written for the Develcon DATASWITCH.
578 * The Develcon sends a string of the form "B{speed}\n" at a predefined
579 * baud rate. This string indicates the user's actual speed.
580 * The routine below returns the terminal type mapped from derived speed.
581 */
582 struct portselect {
583 const char *ps_baud;
584 const char *ps_type;
585 } portspeeds[] = {
586 { "B110", "std.110" },
587 { "B134", "std.134" },
588 { "B150", "std.150" },
589 { "B300", "std.300" },
590 { "B600", "std.600" },
591 { "B1200", "std.1200" },
592 { "B2400", "std.2400" },
593 { "B4800", "std.4800" },
594 { "B9600", "std.9600" },
595 { "B19200", "std.19200" },
596 { 0 }
597 };
598
599 const char *
portselector(void)600 portselector(void)
601 {
602 char c, baud[20];
603 const char *type = "default";
604 struct portselect *ps;
605 int len;
606
607 alarm(5*60);
608 for (len = 0; len < sizeof (baud) - 1; len++) {
609 if (read(STDIN_FILENO, &c, 1) <= 0)
610 break;
611 c &= 0177;
612 if (c == '\n' || c == '\r')
613 break;
614 if (c == 'B')
615 len = 0; /* in case of leading garbage */
616 baud[len] = c;
617 }
618 baud[len] = '\0';
619 for (ps = portspeeds; ps->ps_baud; ps++)
620 if (strcmp(ps->ps_baud, baud) == 0) {
621 type = ps->ps_type;
622 break;
623 }
624 sleep(2); /* wait for connection to complete */
625 return (type);
626 }
627
628 /*
629 * This auto-baud speed select mechanism is written for the Micom 600
630 * portselector. Selection is done by looking at how the character '\r'
631 * is garbled at the different speeds.
632 */
633 const char *
autobaud(void)634 autobaud(void)
635 {
636 int rfds;
637 struct timeval timeout;
638 char c;
639 const char *type = "9600-baud";
640
641 (void)tcflush(0, TCIOFLUSH);
642 rfds = 1 << 0;
643 timeout.tv_sec = 5;
644 timeout.tv_usec = 0;
645 if (select(32, (fd_set *)&rfds, (fd_set *)NULL,
646 (fd_set *)NULL, &timeout) <= 0)
647 return (type);
648 if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char))
649 return (type);
650 timeout.tv_sec = 0;
651 timeout.tv_usec = 20;
652 (void) select(32, (fd_set *)NULL, (fd_set *)NULL,
653 (fd_set *)NULL, &timeout);
654 (void)tcflush(0, TCIOFLUSH);
655 switch (c & 0377) {
656
657 case 0200: /* 300-baud */
658 type = "300-baud";
659 break;
660
661 case 0346: /* 1200-baud */
662 type = "1200-baud";
663 break;
664
665 case 015: /* 2400-baud */
666 case 0215:
667 type = "2400-baud";
668 break;
669
670 default: /* 4800-baud */
671 type = "4800-baud";
672 break;
673
674 case 0377: /* 9600-baud */
675 type = "9600-baud";
676 break;
677 }
678 return (type);
679 }
680