subr.c revision 1.20 1 /* $NetBSD: subr.c,v 1.20 1996/09/27 02:15:35 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #ifndef lint
37 #if 0
38 static char sccsid[] = "from: @(#)subr.c 8.1 (Berkeley) 6/4/93";
39 #else
40 static char rcsid[] = "$NetBSD: subr.c,v 1.20 1996/09/27 02:15:35 thorpej Exp $";
41 #endif
42 #endif /* not lint */
43
44 /*
45 * Melbourne getty.
46 */
47 #define COMPAT_43
48 #include <sys/param.h>
49 #include <stdlib.h>
50 #include <unistd.h>
51 #include <string.h>
52 #include <termios.h>
53 #include <sys/ioctl.h>
54
55 #include "gettytab.h"
56 #include "pathnames.h"
57 #include "extern.h"
58
59 extern struct termios tmode, omode;
60
61 static void compatflags __P((long));
62
63 /*
64 * Get a table entry.
65 */
66 void
67 gettable(name, buf)
68 char *name, *buf;
69 {
70 register struct gettystrs *sp;
71 register struct gettynums *np;
72 register struct gettyflags *fp;
73 long n;
74 char *dba[2];
75 dba[0] = _PATH_GETTYTAB;
76 dba[1] = 0;
77
78 if (cgetent(&buf, dba, name) != 0)
79 return;
80
81 for (sp = gettystrs; sp->field; sp++)
82 cgetstr(buf, sp->field, &sp->value);
83 for (np = gettynums; np->field; np++) {
84 if (cgetnum(buf, np->field, &n) == -1)
85 np->set = 0;
86 else {
87 np->set = 1;
88 np->value = n;
89 }
90 }
91 for (fp = gettyflags; fp->field; fp++) {
92 if (cgetcap(buf, fp->field, ':') == NULL)
93 fp->set = 0;
94 else {
95 fp->set = 1;
96 fp->value = 1 ^ fp->invrt;
97 }
98 }
99 #ifdef DEBUG
100 printf("name=\"%s\", buf=\"%s\"\n", name, buf);
101 for (sp = gettystrs; sp->field; sp++)
102 printf("cgetstr: %s=%s\n", sp->field, sp->value);
103 for (np = gettynums; np->field; np++)
104 printf("cgetnum: %s=%d\n", np->field, np->value);
105 for (fp = gettyflags; fp->field; fp++)
106 printf("cgetflags: %s='%c' set='%c'\n", fp->field,
107 fp->value + '0', fp->set + '0');
108 exit(1);
109 #endif /* DEBUG */
110 }
111
112 void
113 gendefaults()
114 {
115 register struct gettystrs *sp;
116 register struct gettynums *np;
117 register struct gettyflags *fp;
118
119 for (sp = gettystrs; sp->field; sp++)
120 if (sp->value)
121 sp->defalt = sp->value;
122 for (np = gettynums; np->field; np++)
123 if (np->set)
124 np->defalt = np->value;
125 for (fp = gettyflags; fp->field; fp++)
126 if (fp->set)
127 fp->defalt = fp->value;
128 else
129 fp->defalt = fp->invrt;
130 }
131
132 void
133 setdefaults()
134 {
135 register struct gettystrs *sp;
136 register struct gettynums *np;
137 register struct gettyflags *fp;
138
139 for (sp = gettystrs; sp->field; sp++)
140 if (!sp->value)
141 sp->value = sp->defalt;
142 for (np = gettynums; np->field; np++)
143 if (!np->set)
144 np->value = np->defalt;
145 for (fp = gettyflags; fp->field; fp++)
146 if (!fp->set)
147 fp->value = fp->defalt;
148 }
149
150 static char **
151 charnames[] = {
152 &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK,
153 &SU, &DS, &RP, &FL, &WE, &LN, 0
154 };
155
156 static char *
157 charvars[] = {
158 &tmode.c_cc[VERASE], &tmode.c_cc[VKILL], &tmode.c_cc[VINTR],
159 &tmode.c_cc[VQUIT], &tmode.c_cc[VSTART], &tmode.c_cc[VSTOP],
160 &tmode.c_cc[VEOF], &tmode.c_cc[VEOL], &tmode.c_cc[VSUSP],
161 &tmode.c_cc[VDSUSP], &tmode.c_cc[VREPRINT], &tmode.c_cc[VDISCARD],
162 &tmode.c_cc[VWERASE], &tmode.c_cc[VLNEXT], 0
163 };
164
165 void
166 setchars()
167 {
168 register int i;
169 register char *p;
170
171 for (i = 0; charnames[i]; i++) {
172 p = *charnames[i];
173 if (p && *p)
174 *charvars[i] = *p;
175 else
176 *charvars[i] = _POSIX_VDISABLE;
177 }
178 }
179
180 /* Macros to clear/set/test flags. */
181 #define SET(t, f) (t) |= (f)
182 #define CLR(t, f) (t) &= ~(f)
183 #define ISSET(t, f) ((t) & (f))
184
185 void
186 setflags(n)
187 int n;
188 {
189 register tcflag_t iflag, oflag, cflag, lflag;
190
191 #ifdef COMPAT_43
192 switch (n) {
193 case 0:
194 if (F0set) {
195 compatflags(F0);
196 return;
197 }
198 break;
199 case 1:
200 if (F1set) {
201 compatflags(F1);
202 return;
203 }
204 break;
205 default:
206 if (F2set) {
207 compatflags(F2);
208 return;
209 }
210 break;
211 }
212 #endif
213
214 switch (n) {
215 case 0:
216 if (C0set && I0set && L0set && O0set) {
217 tmode.c_cflag = C0;
218 tmode.c_iflag = I0;
219 tmode.c_lflag = L0;
220 tmode.c_oflag = O0;
221 return;
222 }
223 break;
224 case 1:
225 if (C1set && I1set && L1set && O1set) {
226 tmode.c_cflag = C1;
227 tmode.c_iflag = I1;
228 tmode.c_lflag = L1;
229 tmode.c_oflag = O1;
230 return;
231 }
232 break;
233 default:
234 if (C2set && I2set && L2set && O2set) {
235 tmode.c_cflag = C2;
236 tmode.c_iflag = I2;
237 tmode.c_lflag = L2;
238 tmode.c_oflag = O2;
239 return;
240 }
241 break;
242 }
243
244 iflag = omode.c_iflag;
245 oflag = omode.c_oflag;
246 cflag = omode.c_cflag;
247 lflag = omode.c_lflag;
248
249 if (NP) {
250 CLR(cflag, CSIZE|PARENB);
251 SET(cflag, CS8);
252 CLR(iflag, ISTRIP|INPCK|IGNPAR);
253 } else if (AP || EP || OP) {
254 CLR(cflag, CSIZE);
255 SET(cflag, CS7|PARENB);
256 SET(iflag, ISTRIP);
257 if (OP && !EP) {
258 SET(iflag, INPCK|IGNPAR);
259 SET(cflag, PARODD);
260 if (AP)
261 CLR(iflag, INPCK);
262 } else if (EP && !OP) {
263 SET(iflag, INPCK|IGNPAR);
264 CLR(cflag, PARODD);
265 if (AP)
266 CLR(iflag, INPCK);
267 } else if (AP || EP && OP) {
268 CLR(iflag, INPCK|IGNPAR);
269 CLR(cflag, PARODD);
270 }
271 } /* else, leave as is */
272
273 #if 0
274 if (UC)
275 f |= LCASE;
276 #endif
277
278 if (HC)
279 SET(cflag, HUPCL);
280 else
281 CLR(cflag, HUPCL);
282
283 if (MB)
284 SET(cflag, MDMBUF);
285 else
286 CLR(cflag, MDMBUF);
287
288 if (NL) {
289 SET(iflag, ICRNL);
290 SET(oflag, ONLCR|OPOST);
291 } else {
292 CLR(iflag, ICRNL);
293 CLR(oflag, ONLCR);
294 }
295
296 if (!HT)
297 SET(oflag, OXTABS|OPOST);
298 else
299 CLR(oflag, OXTABS);
300
301 #ifdef XXX_DELAY
302 SET(f, delaybits());
303 #endif
304
305 if (n == 1) { /* read mode flags */
306 if (RW) {
307 iflag = 0;
308 CLR(oflag, OPOST);
309 CLR(cflag, CSIZE|PARENB);
310 SET(cflag, CS8);
311 lflag = 0;
312 } else {
313 CLR(lflag, ICANON);
314 }
315 goto out;
316 }
317
318 if (n == 0)
319 goto out;
320
321 #if 0
322 if (CB)
323 SET(f, CRTBS);
324 #endif
325
326 if (CE)
327 SET(lflag, ECHOE);
328 else
329 CLR(lflag, ECHOE);
330
331 if (CK)
332 SET(lflag, ECHOKE);
333 else
334 CLR(lflag, ECHOKE);
335
336 if (PE)
337 SET(lflag, ECHOPRT);
338 else
339 CLR(lflag, ECHOPRT);
340
341 if (EC)
342 SET(lflag, ECHO);
343 else
344 CLR(lflag, ECHO);
345
346 if (XC)
347 SET(lflag, ECHOCTL);
348 else
349 CLR(lflag, ECHOCTL);
350
351 if (DX)
352 SET(lflag, IXANY);
353 else
354 CLR(lflag, IXANY);
355
356 out:
357 tmode.c_iflag = iflag;
358 tmode.c_oflag = oflag;
359 tmode.c_cflag = cflag;
360 tmode.c_lflag = lflag;
361 }
362
363 #ifdef COMPAT_43
364 /*
365 * Old TTY => termios, snatched from <sys/kern/tty_compat.c>
366 */
367 void
368 compatflags(flags)
369 register long flags;
370 {
371 register tcflag_t iflag, oflag, cflag, lflag;
372
373 iflag = BRKINT|ICRNL|IMAXBEL|IXON|IXANY;
374 oflag = OPOST|ONLCR|OXTABS;
375 cflag = CREAD;
376 lflag = ICANON|ISIG|IEXTEN;
377
378 if (ISSET(flags, TANDEM))
379 SET(iflag, IXOFF);
380 else
381 CLR(iflag, IXOFF);
382 if (ISSET(flags, ECHO))
383 SET(lflag, ECHO);
384 else
385 CLR(lflag, ECHO);
386 if (ISSET(flags, CRMOD)) {
387 SET(iflag, ICRNL);
388 SET(oflag, ONLCR);
389 } else {
390 CLR(iflag, ICRNL);
391 CLR(oflag, ONLCR);
392 }
393 if (ISSET(flags, XTABS))
394 SET(oflag, OXTABS);
395 else
396 CLR(oflag, OXTABS);
397
398
399 if (ISSET(flags, RAW)) {
400 iflag &= IXOFF;
401 CLR(lflag, ISIG|ICANON|IEXTEN);
402 CLR(cflag, PARENB);
403 } else {
404 SET(iflag, BRKINT|IXON|IMAXBEL);
405 SET(lflag, ISIG|IEXTEN);
406 if (ISSET(flags, CBREAK))
407 CLR(lflag, ICANON);
408 else
409 SET(lflag, ICANON);
410 switch (ISSET(flags, ANYP)) {
411 case 0:
412 CLR(cflag, PARENB);
413 break;
414 case ANYP:
415 SET(cflag, PARENB);
416 CLR(iflag, INPCK);
417 break;
418 case EVENP:
419 SET(cflag, PARENB);
420 SET(iflag, INPCK);
421 CLR(cflag, PARODD);
422 break;
423 case ODDP:
424 SET(cflag, PARENB);
425 SET(iflag, INPCK);
426 SET(cflag, PARODD);
427 break;
428 }
429 }
430
431 /* Nothing we can do with CRTBS. */
432 if (ISSET(flags, PRTERA))
433 SET(lflag, ECHOPRT);
434 else
435 CLR(lflag, ECHOPRT);
436 if (ISSET(flags, CRTERA))
437 SET(lflag, ECHOE);
438 else
439 CLR(lflag, ECHOE);
440 /* Nothing we can do with TILDE. */
441 if (ISSET(flags, MDMBUF))
442 SET(cflag, MDMBUF);
443 else
444 CLR(cflag, MDMBUF);
445 if (ISSET(flags, NOHANG))
446 CLR(cflag, HUPCL);
447 else
448 SET(cflag, HUPCL);
449 if (ISSET(flags, CRTKIL))
450 SET(lflag, ECHOKE);
451 else
452 CLR(lflag, ECHOKE);
453 if (ISSET(flags, CTLECH))
454 SET(lflag, ECHOCTL);
455 else
456 CLR(lflag, ECHOCTL);
457 if (!ISSET(flags, DECCTQ))
458 SET(iflag, IXANY);
459 else
460 CLR(iflag, IXANY);
461 CLR(lflag, TOSTOP|FLUSHO|PENDIN|NOFLSH);
462 SET(lflag, ISSET(flags, TOSTOP|FLUSHO|PENDIN|NOFLSH));
463
464 if (ISSET(flags, RAW|LITOUT|PASS8)) {
465 CLR(cflag, CSIZE);
466 SET(cflag, CS8);
467 if (!ISSET(flags, RAW|PASS8))
468 SET(iflag, ISTRIP);
469 else
470 CLR(iflag, ISTRIP);
471 if (!ISSET(flags, RAW|LITOUT))
472 SET(oflag, OPOST);
473 else
474 CLR(oflag, OPOST);
475 } else {
476 CLR(cflag, CSIZE);
477 SET(cflag, CS7);
478 SET(iflag, ISTRIP);
479 SET(oflag, OPOST);
480 }
481
482 tmode.c_iflag = iflag;
483 tmode.c_oflag = oflag;
484 tmode.c_cflag = cflag;
485 tmode.c_lflag = lflag;
486 }
487 #endif
488
489 #ifdef XXX_DELAY
490 struct delayval {
491 unsigned delay; /* delay in ms */
492 int bits;
493 };
494
495 /*
496 * below are random guesses, I can't be bothered checking
497 */
498
499 struct delayval crdelay[] = {
500 { 1, CR1 },
501 { 2, CR2 },
502 { 3, CR3 },
503 { 83, CR1 },
504 { 166, CR2 },
505 { 0, CR3 },
506 };
507
508 struct delayval nldelay[] = {
509 { 1, NL1 }, /* special, calculated */
510 { 2, NL2 },
511 { 3, NL3 },
512 { 100, NL2 },
513 { 0, NL3 },
514 };
515
516 struct delayval bsdelay[] = {
517 { 1, BS1 },
518 { 0, 0 },
519 };
520
521 struct delayval ffdelay[] = {
522 { 1, FF1 },
523 { 1750, FF1 },
524 { 0, FF1 },
525 };
526
527 struct delayval tbdelay[] = {
528 { 1, TAB1 },
529 { 2, TAB2 },
530 { 3, XTABS }, /* this is expand tabs */
531 { 100, TAB1 },
532 { 0, TAB2 },
533 };
534
535 int
536 delaybits()
537 {
538 register int f;
539
540 f = adelay(CD, crdelay);
541 f |= adelay(ND, nldelay);
542 f |= adelay(FD, ffdelay);
543 f |= adelay(TD, tbdelay);
544 f |= adelay(BD, bsdelay);
545 return (f);
546 }
547
548 int
549 adelay(ms, dp)
550 register ms;
551 register struct delayval *dp;
552 {
553 if (ms == 0)
554 return (0);
555 while (dp->delay && ms > dp->delay)
556 dp++;
557 return (dp->bits);
558 }
559 #endif
560
561 char editedhost[MAXHOSTNAMELEN];
562
563 void
564 edithost(pat)
565 register char *pat;
566 {
567 register char *host = HN;
568 register char *res = editedhost;
569
570 if (!pat)
571 pat = "";
572 while (*pat) {
573 switch (*pat) {
574
575 case '#':
576 if (*host)
577 host++;
578 break;
579
580 case '@':
581 if (*host)
582 *res++ = *host++;
583 break;
584
585 default:
586 *res++ = *pat;
587 break;
588
589 }
590 if (res == &editedhost[sizeof editedhost - 1]) {
591 *res = '\0';
592 return;
593 }
594 pat++;
595 }
596 if (*host)
597 strncpy(res, host, sizeof editedhost - (res - editedhost) - 1);
598 else
599 *res = '\0';
600 editedhost[sizeof editedhost - 1] = '\0';
601 }
602
603 void
604 makeenv(env)
605 char *env[];
606 {
607 static char termbuf[128] = "TERM=";
608 register char *p, *q;
609 register char **ep;
610
611 ep = env;
612 if (TT && *TT) {
613 strcat(termbuf, TT);
614 *ep++ = termbuf;
615 }
616 if (p = EV) {
617 q = p;
618 while (q = strchr(q, ',')) {
619 *q++ = '\0';
620 *ep++ = p;
621 p = q;
622 }
623 if (*p)
624 *ep++ = p;
625 }
626 *ep = (char *)0;
627 }
628
629 /*
630 * This speed select mechanism is written for the Develcon DATASWITCH.
631 * The Develcon sends a string of the form "B{speed}\n" at a predefined
632 * baud rate. This string indicates the user's actual speed.
633 * The routine below returns the terminal type mapped from derived speed.
634 */
635 struct portselect {
636 char *ps_baud;
637 char *ps_type;
638 } portspeeds[] = {
639 { "B110", "std.110" },
640 { "B134", "std.134" },
641 { "B150", "std.150" },
642 { "B300", "std.300" },
643 { "B600", "std.600" },
644 { "B1200", "std.1200" },
645 { "B2400", "std.2400" },
646 { "B4800", "std.4800" },
647 { "B9600", "std.9600" },
648 { "B19200", "std.19200" },
649 { 0 }
650 };
651
652 char *
653 portselector()
654 {
655 char c, baud[20], *type = "default";
656 register struct portselect *ps;
657 int len;
658
659 alarm(5*60);
660 for (len = 0; len < sizeof (baud) - 1; len++) {
661 if (read(STDIN_FILENO, &c, 1) <= 0)
662 break;
663 c &= 0177;
664 if (c == '\n' || c == '\r')
665 break;
666 if (c == 'B')
667 len = 0; /* in case of leading garbage */
668 baud[len] = c;
669 }
670 baud[len] = '\0';
671 for (ps = portspeeds; ps->ps_baud; ps++)
672 if (strcmp(ps->ps_baud, baud) == 0) {
673 type = ps->ps_type;
674 break;
675 }
676 sleep(2); /* wait for connection to complete */
677 return (type);
678 }
679
680 /*
681 * This auto-baud speed select mechanism is written for the Micom 600
682 * portselector. Selection is done by looking at how the character '\r'
683 * is garbled at the different speeds.
684 */
685 #include <sys/time.h>
686
687 char *
688 autobaud()
689 {
690 int rfds;
691 struct timeval timeout;
692 char c, *type = "9600-baud";
693
694 (void)tcflush(0, TCIOFLUSH);
695 rfds = 1 << 0;
696 timeout.tv_sec = 5;
697 timeout.tv_usec = 0;
698 if (select(32, (fd_set *)&rfds, (fd_set *)NULL,
699 (fd_set *)NULL, &timeout) <= 0)
700 return (type);
701 if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char))
702 return (type);
703 timeout.tv_sec = 0;
704 timeout.tv_usec = 20;
705 (void) select(32, (fd_set *)NULL, (fd_set *)NULL,
706 (fd_set *)NULL, &timeout);
707 (void)tcflush(0, TCIOFLUSH);
708 switch (c & 0377) {
709
710 case 0200: /* 300-baud */
711 type = "300-baud";
712 break;
713
714 case 0346: /* 1200-baud */
715 type = "1200-baud";
716 break;
717
718 case 015: /* 2400-baud */
719 case 0215:
720 type = "2400-baud";
721 break;
722
723 default: /* 4800-baud */
724 type = "4800-baud";
725 break;
726
727 case 0377: /* 9600-baud */
728 type = "9600-baud";
729 break;
730 }
731 return (type);
732 }
733