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 <sys/ioctl.h>
42 #include <sys/param.h>
43 #include <sys/time.h>
44
45 #include <poll.h>
46 #include <regex.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <syslog.h>
50 #include <termios.h>
51 #include <unistd.h>
52
53 #include "gettytab.h"
54 #include "pathnames.h"
55 #include "extern.h"
56
57 /*
58 * Get a table entry.
59 */
60 void
gettable(const char * name,char * buf)61 gettable(const char *name, char *buf)
62 {
63 struct gettystrs *sp;
64 struct gettynums *np;
65 struct gettyflags *fp;
66 long n;
67 int l;
68 char *p;
69 char *msg = NULL;
70 const char *dba[2];
71
72 static int firsttime = 1;
73
74 dba[0] = _PATH_GETTYTAB;
75 dba[1] = NULL;
76
77 if (firsttime) {
78 /*
79 * we need to strdup() anything in the strings array
80 * initially in order to simplify things later
81 */
82 for (sp = gettystrs; sp->field; sp++)
83 if (sp->value != NULL) {
84 /* handle these ones more carefully */
85 if (sp >= &gettystrs[4] && sp <= &gettystrs[6])
86 l = 2;
87 else
88 l = strlen(sp->value) + 1;
89 if ((p = malloc(l)) != NULL) {
90 strncpy(p, sp->value, l);
91 p[l-1] = '\0';
92 }
93 /*
94 * replace, even if NULL, else we'll
95 * have problems with free()ing static mem
96 */
97 sp->value = p;
98 }
99 firsttime = 0;
100 }
101
102 switch (cgetent(&buf, (char **)dba, (char *)name)) {
103 case 1:
104 msg = "%s: couldn't resolve 'tc=' in gettytab '%s'";
105 case 0:
106 break;
107 case -1:
108 msg = "%s: unknown gettytab entry '%s'";
109 break;
110 case -2:
111 msg = "%s: retrieving gettytab entry '%s': %m";
112 break;
113 case -3:
114 msg = "%s: recursive 'tc=' reference gettytab entry '%s'";
115 break;
116 default:
117 msg = "%s: unexpected cgetent() error for entry '%s'";
118 break;
119 }
120
121 if (msg != NULL) {
122 syslog(LOG_ERR, msg, "getty", name);
123 return;
124 }
125
126 for (sp = gettystrs; sp->field; sp++) {
127 if ((l = cgetstr(buf, (char*)sp->field, &p)) >= 0) {
128 if (sp->value) {
129 /* prefer existing value */
130 if (strcmp(p, sp->value) != 0)
131 free(sp->value);
132 else {
133 free(p);
134 p = sp->value;
135 }
136 }
137 sp->value = p;
138 } else if (l == -1) {
139 free(sp->value);
140 sp->value = NULL;
141 }
142 }
143
144 for (np = gettynums; np->field; np++) {
145 if (cgetnum(buf, (char*)np->field, &n) == -1)
146 np->set = 0;
147 else {
148 np->set = 1;
149 np->value = n;
150 }
151 }
152
153 for (fp = gettyflags; fp->field; fp++) {
154 if (cgetcap(buf, (char *)fp->field, ':') == NULL)
155 fp->set = 0;
156 else {
157 fp->set = 1;
158 fp->value = 1 ^ fp->invrt;
159 }
160 }
161 }
162
163 void
gendefaults(void)164 gendefaults(void)
165 {
166 struct gettystrs *sp;
167 struct gettynums *np;
168 struct gettyflags *fp;
169
170 for (sp = gettystrs; sp->field; sp++)
171 if (sp->value)
172 sp->defalt = strdup(sp->value);
173 for (np = gettynums; np->field; np++)
174 if (np->set)
175 np->defalt = np->value;
176 for (fp = gettyflags; fp->field; fp++)
177 if (fp->set)
178 fp->defalt = fp->value;
179 else
180 fp->defalt = fp->invrt;
181 }
182
183 void
setdefaults(void)184 setdefaults(void)
185 {
186 struct gettystrs *sp;
187 struct gettynums *np;
188 struct gettyflags *fp;
189
190 for (sp = gettystrs; sp->field; sp++)
191 if (!sp->value)
192 sp->value = !sp->defalt ? sp->defalt
193 : strdup(sp->defalt);
194 for (np = gettynums; np->field; np++)
195 if (!np->set)
196 np->value = np->defalt;
197 for (fp = gettyflags; fp->field; fp++)
198 if (!fp->set)
199 fp->value = fp->defalt;
200 }
201
202 static char **
203 charnames[] = {
204 &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK,
205 &SU, &DS, &RP, &FL, &WE, &LN, 0
206 };
207
208 static char *
209 charvars[] = {
210 &tmode.c_cc[VERASE], &tmode.c_cc[VKILL], &tmode.c_cc[VINTR],
211 &tmode.c_cc[VQUIT], &tmode.c_cc[VSTART], &tmode.c_cc[VSTOP],
212 &tmode.c_cc[VEOF], &tmode.c_cc[VEOL], &tmode.c_cc[VSUSP],
213 &tmode.c_cc[VDSUSP], &tmode.c_cc[VREPRINT], &tmode.c_cc[VDISCARD],
214 &tmode.c_cc[VWERASE], &tmode.c_cc[VLNEXT], 0
215 };
216
217 void
setchars(void)218 setchars(void)
219 {
220 int i;
221 const char *p;
222
223 for (i = 0; charnames[i]; i++) {
224 p = *charnames[i];
225 if (p && *p)
226 *charvars[i] = *p;
227 else
228 *charvars[i] = _POSIX_VDISABLE;
229 }
230 }
231
232 /* Macros to clear/set/test flags. */
233 #define SET(t, f) (t) |= (f)
234 #define CLR(t, f) (t) &= ~(f)
235 #define ISSET(t, f) ((t) & (f))
236
237 void
set_flags(int n)238 set_flags(int n)
239 {
240 tcflag_t iflag, oflag, cflag, lflag;
241
242
243 switch (n) {
244 case 0:
245 if (C0set && I0set && L0set && O0set) {
246 tmode.c_cflag = C0;
247 tmode.c_iflag = I0;
248 tmode.c_lflag = L0;
249 tmode.c_oflag = O0;
250 return;
251 }
252 break;
253 case 1:
254 if (C1set && I1set && L1set && O1set) {
255 tmode.c_cflag = C1;
256 tmode.c_iflag = I1;
257 tmode.c_lflag = L1;
258 tmode.c_oflag = O1;
259 return;
260 }
261 break;
262 default:
263 if (C2set && I2set && L2set && O2set) {
264 tmode.c_cflag = C2;
265 tmode.c_iflag = I2;
266 tmode.c_lflag = L2;
267 tmode.c_oflag = O2;
268 return;
269 }
270 break;
271 }
272
273 iflag = omode.c_iflag;
274 oflag = omode.c_oflag;
275 cflag = omode.c_cflag;
276 lflag = omode.c_lflag;
277
278 if (NP) {
279 CLR(cflag, CSIZE|PARENB);
280 SET(cflag, CS8);
281 CLR(iflag, ISTRIP|INPCK|IGNPAR);
282 } else if (AP || EP || OP) {
283 CLR(cflag, CSIZE);
284 SET(cflag, CS7|PARENB);
285 SET(iflag, ISTRIP);
286 if (OP && !EP) {
287 SET(iflag, INPCK|IGNPAR);
288 SET(cflag, PARODD);
289 if (AP)
290 CLR(iflag, INPCK);
291 } else if (EP && !OP) {
292 SET(iflag, INPCK|IGNPAR);
293 CLR(cflag, PARODD);
294 if (AP)
295 CLR(iflag, INPCK);
296 } else if (AP || (EP && OP)) {
297 CLR(iflag, INPCK|IGNPAR);
298 CLR(cflag, PARODD);
299 }
300 } /* else, leave as is */
301
302 #if 0
303 if (UC)
304 f |= LCASE;
305 #endif
306
307 if (HC)
308 SET(cflag, HUPCL);
309 else
310 CLR(cflag, HUPCL);
311
312 if (MB)
313 SET(cflag, MDMBUF);
314 else
315 CLR(cflag, MDMBUF);
316
317 if (HW)
318 SET(cflag, CRTSCTS);
319 else
320 CLR(cflag, CRTSCTS);
321
322 if (NL) {
323 SET(iflag, ICRNL);
324 SET(oflag, ONLCR|OPOST);
325 } else {
326 CLR(iflag, ICRNL);
327 CLR(oflag, ONLCR);
328 }
329
330 if (!HT)
331 SET(oflag, OXTABS|OPOST);
332 else
333 CLR(oflag, OXTABS);
334
335 #ifdef XXX_DELAY
336 SET(f, delaybits());
337 #endif
338
339 if (n == 1) { /* read mode flags */
340 if (RW) {
341 iflag = 0;
342 CLR(oflag, OPOST);
343 CLR(cflag, CSIZE|PARENB);
344 SET(cflag, CS8);
345 lflag = 0;
346 } else {
347 CLR(lflag, ICANON);
348 }
349 goto out;
350 }
351
352 if (n == 0)
353 goto out;
354
355 #if 0
356 if (CB)
357 SET(f, CRTBS);
358 #endif
359
360 if (CE)
361 SET(lflag, ECHOE);
362 else
363 CLR(lflag, ECHOE);
364
365 if (CK)
366 SET(lflag, ECHOKE);
367 else
368 CLR(lflag, ECHOKE);
369
370 if (PE)
371 SET(lflag, ECHOPRT);
372 else
373 CLR(lflag, ECHOPRT);
374
375 if (EC)
376 SET(lflag, ECHO);
377 else
378 CLR(lflag, ECHO);
379
380 if (XC)
381 SET(lflag, ECHOCTL);
382 else
383 CLR(lflag, ECHOCTL);
384
385 if (DX)
386 SET(lflag, IXANY);
387 else
388 CLR(lflag, IXANY);
389
390 out:
391 tmode.c_iflag = iflag;
392 tmode.c_oflag = oflag;
393 tmode.c_cflag = cflag;
394 tmode.c_lflag = lflag;
395 }
396
397
398 #ifdef XXX_DELAY
399 struct delayval {
400 unsigned delay; /* delay in ms */
401 int bits;
402 };
403
404 /*
405 * below are random guesses, I can't be bothered checking
406 */
407
408 struct delayval crdelay[] = {
409 { 1, CR1 },
410 { 2, CR2 },
411 { 3, CR3 },
412 { 83, CR1 },
413 { 166, CR2 },
414 { 0, CR3 },
415 };
416
417 struct delayval nldelay[] = {
418 { 1, NL1 }, /* special, calculated */
419 { 2, NL2 },
420 { 3, NL3 },
421 { 100, NL2 },
422 { 0, NL3 },
423 };
424
425 struct delayval bsdelay[] = {
426 { 1, BS1 },
427 { 0, 0 },
428 };
429
430 struct delayval ffdelay[] = {
431 { 1, FF1 },
432 { 1750, FF1 },
433 { 0, FF1 },
434 };
435
436 struct delayval tbdelay[] = {
437 { 1, TAB1 },
438 { 2, TAB2 },
439 { 3, XTABS }, /* this is expand tabs */
440 { 100, TAB1 },
441 { 0, TAB2 },
442 };
443
444 int
delaybits(void)445 delaybits(void)
446 {
447 int f;
448
449 f = adelay(CD, crdelay);
450 f |= adelay(ND, nldelay);
451 f |= adelay(FD, ffdelay);
452 f |= adelay(TD, tbdelay);
453 f |= adelay(BD, bsdelay);
454 return (f);
455 }
456
457 int
adelay(int ms,struct delayval * dp)458 adelay(int ms, struct delayval *dp)
459 {
460 if (ms == 0)
461 return (0);
462 while (dp->delay && ms > dp->delay)
463 dp++;
464 return (dp->bits);
465 }
466 #endif
467
468 char editedhost[MAXHOSTNAMELEN];
469
470 void
edithost(const char * pattern)471 edithost(const char *pattern)
472 {
473 regex_t regex;
474 regmatch_t *match;
475 int found;
476
477 if (pattern == NULL || *pattern == '\0')
478 goto copyasis;
479 if (regcomp(®ex, pattern, REG_EXTENDED) != 0)
480 goto copyasis;
481
482 match = calloc(regex.re_nsub + 1, sizeof(*match));
483 if (match == NULL) {
484 regfree(®ex);
485 goto copyasis;
486 }
487
488 found = !regexec(®ex, HN, regex.re_nsub + 1, match, 0);
489 if (found) {
490 size_t subex, totalsize;
491
492 /*
493 * We found a match. If there were no parenthesized
494 * subexpressions in the pattern, use entire matched
495 * string as ``editedhost''; otherwise use the first
496 * matched subexpression.
497 */
498 subex = !!regex.re_nsub;
499 totalsize = match[subex].rm_eo - match[subex].rm_so + 1;
500 strlcpy(editedhost, HN + match[subex].rm_so, totalsize >
501 sizeof(editedhost) ? sizeof(editedhost) : totalsize);
502 }
503 free(match);
504 regfree(®ex);
505 if (found)
506 return;
507 /*
508 * In case of any errors, or if the pattern did not match, pass
509 * the original hostname as is.
510 */
511 copyasis:
512 strlcpy(editedhost, HN, sizeof(editedhost));
513 }
514
515 static struct speedtab {
516 int speed;
517 int uxname;
518 } speedtab[] = {
519 { 50, B50 },
520 { 75, B75 },
521 { 110, B110 },
522 { 134, B134 },
523 { 150, B150 },
524 { 200, B200 },
525 { 300, B300 },
526 { 600, B600 },
527 { 1200, B1200 },
528 { 1800, B1800 },
529 { 2400, B2400 },
530 { 4800, B4800 },
531 { 9600, B9600 },
532 { 19200, EXTA },
533 { 19, EXTA }, /* for people who say 19.2K */
534 { 38400, EXTB },
535 { 38, EXTB },
536 { 7200, EXTB }, /* alternative */
537 { 57600, B57600 },
538 { 115200, B115200 },
539 { 230400, B230400 },
540 { 0 }
541 };
542
543 int
speed(int val)544 speed(int val)
545 {
546 struct speedtab *sp;
547
548 if (val <= B230400)
549 return (val);
550
551 for (sp = speedtab; sp->speed; sp++)
552 if (sp->speed == val)
553 return (sp->uxname);
554
555 return (B300); /* default in impossible cases */
556 }
557
558 void
makeenv(char * env[])559 makeenv(char *env[])
560 {
561 static char termbuf[128] = "TERM=";
562 char *p, *q;
563 char **ep;
564
565 ep = env;
566 if (TT && *TT) {
567 strlcat(termbuf, TT, sizeof(termbuf));
568 *ep++ = termbuf;
569 }
570 if ((p = EV)) {
571 q = p;
572 while ((q = strchr(q, ','))) {
573 *q++ = '\0';
574 *ep++ = p;
575 p = q;
576 }
577 if (*p)
578 *ep++ = p;
579 }
580 *ep = (char *)0;
581 }
582
583 /*
584 * This speed select mechanism is written for the Develcon DATASWITCH.
585 * The Develcon sends a string of the form "B{speed}\n" at a predefined
586 * baud rate. This string indicates the user's actual speed.
587 * The routine below returns the terminal type mapped from derived speed.
588 */
589 struct portselect {
590 const char *ps_baud;
591 const char *ps_type;
592 } portspeeds[] = {
593 { "B110", "std.110" },
594 { "B134", "std.134" },
595 { "B150", "std.150" },
596 { "B300", "std.300" },
597 { "B600", "std.600" },
598 { "B1200", "std.1200" },
599 { "B2400", "std.2400" },
600 { "B4800", "std.4800" },
601 { "B9600", "std.9600" },
602 { "B19200", "std.19200" },
603 { NULL, NULL }
604 };
605
606 const char *
portselector(void)607 portselector(void)
608 {
609 char c, baud[20];
610 const char *type = "default";
611 struct portselect *ps;
612 size_t len;
613
614 alarm(5*60);
615 for (len = 0; len < sizeof (baud) - 1; len++) {
616 if (read(STDIN_FILENO, &c, 1) <= 0)
617 break;
618 c &= 0177;
619 if (c == '\n' || c == '\r')
620 break;
621 if (c == 'B')
622 len = 0; /* in case of leading garbage */
623 baud[len] = c;
624 }
625 baud[len] = '\0';
626 for (ps = portspeeds; ps->ps_baud; ps++)
627 if (strcmp(ps->ps_baud, baud) == 0) {
628 type = ps->ps_type;
629 break;
630 }
631 sleep(2); /* wait for connection to complete */
632 return (type);
633 }
634
635 /*
636 * This auto-baud speed select mechanism is written for the Micom 600
637 * portselector. Selection is done by looking at how the character '\r'
638 * is garbled at the different speeds.
639 */
640 const char *
autobaud(void)641 autobaud(void)
642 {
643 struct pollfd set[1];
644 struct timespec timeout;
645 char c;
646 const char *type = "9600-baud";
647
648 (void)tcflush(0, TCIOFLUSH);
649 set[0].fd = STDIN_FILENO;
650 set[0].events = POLLIN;
651 if (poll(set, 1, 5000) <= 0)
652 return (type);
653 if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char))
654 return (type);
655 timeout.tv_sec = 0;
656 timeout.tv_nsec = 20000;
657 (void)nanosleep(&timeout, NULL);
658 (void)tcflush(0, TCIOFLUSH);
659 switch (c & 0377) {
660
661 case 0200: /* 300-baud */
662 type = "300-baud";
663 break;
664
665 case 0346: /* 1200-baud */
666 type = "1200-baud";
667 break;
668
669 case 015: /* 2400-baud */
670 case 0215:
671 type = "2400-baud";
672 break;
673
674 default: /* 4800-baud */
675 type = "4800-baud";
676 break;
677
678 case 0377: /* 9600-baud */
679 type = "9600-baud";
680 break;
681 }
682 return (type);
683 }
684