subr.c revision 1.19 1 /* $NetBSD: subr.c,v 1.19 1996/07/31 20:40:36 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 1.19 1996/07/31 20:40:36 thorpej Exp $";
41 #endif
42 #endif /* not lint */
43
44 /*
45 * Melbourne getty.
46 */
47 #define COMPAT_43
48 #include <stdlib.h>
49 #include <unistd.h>
50 #include <string.h>
51 #include <termios.h>
52 #include <sys/ioctl.h>
53
54 #include "gettytab.h"
55 #include "pathnames.h"
56 #include "extern.h"
57
58 extern struct termios tmode, omode;
59
60 static void compatflags __P((long));
61
62 /*
63 * Get a table entry.
64 */
65 void
66 gettable(name, buf)
67 char *name, *buf;
68 {
69 register struct gettystrs *sp;
70 register struct gettynums *np;
71 register struct gettyflags *fp;
72 long n;
73 char *dba[2];
74 dba[0] = _PATH_GETTYTAB;
75 dba[1] = 0;
76
77 if (cgetent(&buf, dba, name) != 0)
78 return;
79
80 for (sp = gettystrs; sp->field; sp++)
81 cgetstr(buf, sp->field, &sp->value);
82 for (np = gettynums; np->field; np++) {
83 if (cgetnum(buf, np->field, &n) == -1)
84 np->set = 0;
85 else {
86 np->set = 1;
87 np->value = n;
88 }
89 }
90 for (fp = gettyflags; fp->field; fp++) {
91 if (cgetcap(buf, fp->field, ':') == NULL)
92 fp->set = 0;
93 else {
94 fp->set = 1;
95 fp->value = 1 ^ fp->invrt;
96 }
97 }
98 #ifdef DEBUG
99 printf("name=\"%s\", buf=\"%s\"\n", name, buf);
100 for (sp = gettystrs; sp->field; sp++)
101 printf("cgetstr: %s=%s\n", sp->field, sp->value);
102 for (np = gettynums; np->field; np++)
103 printf("cgetnum: %s=%d\n", np->field, np->value);
104 for (fp = gettyflags; fp->field; fp++)
105 printf("cgetflags: %s='%c' set='%c'\n", fp->field,
106 fp->value + '0', fp->set + '0');
107 exit(1);
108 #endif /* DEBUG */
109 }
110
111 void
112 gendefaults()
113 {
114 register struct gettystrs *sp;
115 register struct gettynums *np;
116 register struct gettyflags *fp;
117
118 for (sp = gettystrs; sp->field; sp++)
119 if (sp->value)
120 sp->defalt = sp->value;
121 for (np = gettynums; np->field; np++)
122 if (np->set)
123 np->defalt = np->value;
124 for (fp = gettyflags; fp->field; fp++)
125 if (fp->set)
126 fp->defalt = fp->value;
127 else
128 fp->defalt = fp->invrt;
129 }
130
131 void
132 setdefaults()
133 {
134 register struct gettystrs *sp;
135 register struct gettynums *np;
136 register struct gettyflags *fp;
137
138 for (sp = gettystrs; sp->field; sp++)
139 if (!sp->value)
140 sp->value = sp->defalt;
141 for (np = gettynums; np->field; np++)
142 if (!np->set)
143 np->value = np->defalt;
144 for (fp = gettyflags; fp->field; fp++)
145 if (!fp->set)
146 fp->value = fp->defalt;
147 }
148
149 static char **
150 charnames[] = {
151 &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK,
152 &SU, &DS, &RP, &FL, &WE, &LN, 0
153 };
154
155 static char *
156 charvars[] = {
157 &tmode.c_cc[VERASE], &tmode.c_cc[VKILL], &tmode.c_cc[VINTR],
158 &tmode.c_cc[VQUIT], &tmode.c_cc[VSTART], &tmode.c_cc[VSTOP],
159 &tmode.c_cc[VEOF], &tmode.c_cc[VEOL], &tmode.c_cc[VSUSP],
160 &tmode.c_cc[VDSUSP], &tmode.c_cc[VREPRINT], &tmode.c_cc[VDISCARD],
161 &tmode.c_cc[VWERASE], &tmode.c_cc[VLNEXT], 0
162 };
163
164 void
165 setchars()
166 {
167 register int i;
168 register char *p;
169
170 for (i = 0; charnames[i]; i++) {
171 p = *charnames[i];
172 if (p && *p)
173 *charvars[i] = *p;
174 else
175 *charvars[i] = _POSIX_VDISABLE;
176 }
177 }
178
179 /* Macros to clear/set/test flags. */
180 #define SET(t, f) (t) |= (f)
181 #define CLR(t, f) (t) &= ~(f)
182 #define ISSET(t, f) ((t) & (f))
183
184 void
185 setflags(n)
186 int n;
187 {
188 register tcflag_t iflag, oflag, cflag, lflag;
189
190 #ifdef COMPAT_43
191 switch (n) {
192 case 0:
193 if (F0set) {
194 compatflags(F0);
195 return;
196 }
197 break;
198 case 1:
199 if (F1set) {
200 compatflags(F1);
201 return;
202 }
203 break;
204 default:
205 if (F2set) {
206 compatflags(F2);
207 return;
208 }
209 break;
210 }
211 #endif
212
213 switch (n) {
214 case 0:
215 if (C0set && I0set && L0set && O0set) {
216 tmode.c_cflag = C0;
217 tmode.c_iflag = I0;
218 tmode.c_lflag = L0;
219 tmode.c_oflag = O0;
220 return;
221 }
222 break;
223 case 1:
224 if (C1set && I1set && L1set && O1set) {
225 tmode.c_cflag = C1;
226 tmode.c_iflag = I1;
227 tmode.c_lflag = L1;
228 tmode.c_oflag = O1;
229 return;
230 }
231 break;
232 default:
233 if (C2set && I2set && L2set && O2set) {
234 tmode.c_cflag = C2;
235 tmode.c_iflag = I2;
236 tmode.c_lflag = L2;
237 tmode.c_oflag = O2;
238 return;
239 }
240 break;
241 }
242
243 iflag = omode.c_iflag;
244 oflag = omode.c_oflag;
245 cflag = omode.c_cflag;
246 lflag = omode.c_lflag;
247
248 if (NP) {
249 CLR(cflag, CSIZE|PARENB);
250 SET(cflag, CS8);
251 CLR(iflag, ISTRIP|INPCK|IGNPAR);
252 } else if (AP || EP || OP) {
253 CLR(cflag, CSIZE);
254 SET(cflag, CS7|PARENB);
255 SET(iflag, ISTRIP);
256 if (OP && !EP) {
257 SET(iflag, INPCK|IGNPAR);
258 SET(cflag, PARODD);
259 if (AP)
260 CLR(iflag, INPCK);
261 } else if (EP && !OP) {
262 SET(iflag, INPCK|IGNPAR);
263 CLR(cflag, PARODD);
264 if (AP)
265 CLR(iflag, INPCK);
266 } else if (AP || EP && OP) {
267 CLR(iflag, INPCK|IGNPAR);
268 CLR(cflag, PARODD);
269 }
270 } /* else, leave as is */
271
272 #if 0
273 if (UC)
274 f |= LCASE;
275 #endif
276
277 if (HC)
278 SET(cflag, HUPCL);
279 else
280 CLR(cflag, HUPCL);
281
282 if (MB)
283 SET(cflag, MDMBUF);
284 else
285 CLR(cflag, MDMBUF);
286
287 if (NL) {
288 SET(iflag, ICRNL);
289 SET(oflag, ONLCR|OPOST);
290 } else {
291 CLR(iflag, ICRNL);
292 CLR(oflag, ONLCR);
293 }
294
295 if (!HT)
296 SET(oflag, OXTABS|OPOST);
297 else
298 CLR(oflag, OXTABS);
299
300 #ifdef XXX_DELAY
301 SET(f, delaybits());
302 #endif
303
304 if (n == 1) { /* read mode flags */
305 if (RW) {
306 iflag = 0;
307 CLR(oflag, OPOST);
308 CLR(cflag, CSIZE|PARENB);
309 SET(cflag, CS8);
310 lflag = 0;
311 } else {
312 CLR(lflag, ICANON);
313 }
314 goto out;
315 }
316
317 if (n == 0)
318 goto out;
319
320 #if 0
321 if (CB)
322 SET(f, CRTBS);
323 #endif
324
325 if (CE)
326 SET(lflag, ECHOE);
327 else
328 CLR(lflag, ECHOE);
329
330 if (CK)
331 SET(lflag, ECHOKE);
332 else
333 CLR(lflag, ECHOKE);
334
335 if (PE)
336 SET(lflag, ECHOPRT);
337 else
338 CLR(lflag, ECHOPRT);
339
340 if (EC)
341 SET(lflag, ECHO);
342 else
343 CLR(lflag, ECHO);
344
345 if (XC)
346 SET(lflag, ECHOCTL);
347 else
348 CLR(lflag, ECHOCTL);
349
350 if (DX)
351 SET(lflag, IXANY);
352 else
353 CLR(lflag, IXANY);
354
355 out:
356 tmode.c_iflag = iflag;
357 tmode.c_oflag = oflag;
358 tmode.c_cflag = cflag;
359 tmode.c_lflag = lflag;
360 }
361
362 #ifdef COMPAT_43
363 /*
364 * Old TTY => termios, snatched from <sys/kern/tty_compat.c>
365 */
366 void
367 compatflags(flags)
368 register long flags;
369 {
370 register tcflag_t iflag, oflag, cflag, lflag;
371
372 iflag = BRKINT|ICRNL|IMAXBEL|IXON|IXANY;
373 oflag = OPOST|ONLCR|OXTABS;
374 cflag = CREAD;
375 lflag = ICANON|ISIG|IEXTEN;
376
377 if (ISSET(flags, TANDEM))
378 SET(iflag, IXOFF);
379 else
380 CLR(iflag, IXOFF);
381 if (ISSET(flags, ECHO))
382 SET(lflag, ECHO);
383 else
384 CLR(lflag, ECHO);
385 if (ISSET(flags, CRMOD)) {
386 SET(iflag, ICRNL);
387 SET(oflag, ONLCR);
388 } else {
389 CLR(iflag, ICRNL);
390 CLR(oflag, ONLCR);
391 }
392 if (ISSET(flags, XTABS))
393 SET(oflag, OXTABS);
394 else
395 CLR(oflag, OXTABS);
396
397
398 if (ISSET(flags, RAW)) {
399 iflag &= IXOFF;
400 CLR(lflag, ISIG|ICANON|IEXTEN);
401 CLR(cflag, PARENB);
402 } else {
403 SET(iflag, BRKINT|IXON|IMAXBEL);
404 SET(lflag, ISIG|IEXTEN);
405 if (ISSET(flags, CBREAK))
406 CLR(lflag, ICANON);
407 else
408 SET(lflag, ICANON);
409 switch (ISSET(flags, ANYP)) {
410 case 0:
411 CLR(cflag, PARENB);
412 break;
413 case ANYP:
414 SET(cflag, PARENB);
415 CLR(iflag, INPCK);
416 break;
417 case EVENP:
418 SET(cflag, PARENB);
419 SET(iflag, INPCK);
420 CLR(cflag, PARODD);
421 break;
422 case ODDP:
423 SET(cflag, PARENB);
424 SET(iflag, INPCK);
425 SET(cflag, PARODD);
426 break;
427 }
428 }
429
430 /* Nothing we can do with CRTBS. */
431 if (ISSET(flags, PRTERA))
432 SET(lflag, ECHOPRT);
433 else
434 CLR(lflag, ECHOPRT);
435 if (ISSET(flags, CRTERA))
436 SET(lflag, ECHOE);
437 else
438 CLR(lflag, ECHOE);
439 /* Nothing we can do with TILDE. */
440 if (ISSET(flags, MDMBUF))
441 SET(cflag, MDMBUF);
442 else
443 CLR(cflag, MDMBUF);
444 if (ISSET(flags, NOHANG))
445 CLR(cflag, HUPCL);
446 else
447 SET(cflag, HUPCL);
448 if (ISSET(flags, CRTKIL))
449 SET(lflag, ECHOKE);
450 else
451 CLR(lflag, ECHOKE);
452 if (ISSET(flags, CTLECH))
453 SET(lflag, ECHOCTL);
454 else
455 CLR(lflag, ECHOCTL);
456 if (!ISSET(flags, DECCTQ))
457 SET(iflag, IXANY);
458 else
459 CLR(iflag, IXANY);
460 CLR(lflag, TOSTOP|FLUSHO|PENDIN|NOFLSH);
461 SET(lflag, ISSET(flags, TOSTOP|FLUSHO|PENDIN|NOFLSH));
462
463 if (ISSET(flags, RAW|LITOUT|PASS8)) {
464 CLR(cflag, CSIZE);
465 SET(cflag, CS8);
466 if (!ISSET(flags, RAW|PASS8))
467 SET(iflag, ISTRIP);
468 else
469 CLR(iflag, ISTRIP);
470 if (!ISSET(flags, RAW|LITOUT))
471 SET(oflag, OPOST);
472 else
473 CLR(oflag, OPOST);
474 } else {
475 CLR(cflag, CSIZE);
476 SET(cflag, CS7);
477 SET(iflag, ISTRIP);
478 SET(oflag, OPOST);
479 }
480
481 tmode.c_iflag = iflag;
482 tmode.c_oflag = oflag;
483 tmode.c_cflag = cflag;
484 tmode.c_lflag = lflag;
485 }
486 #endif
487
488 #ifdef XXX_DELAY
489 struct delayval {
490 unsigned delay; /* delay in ms */
491 int bits;
492 };
493
494 /*
495 * below are random guesses, I can't be bothered checking
496 */
497
498 struct delayval crdelay[] = {
499 { 1, CR1 },
500 { 2, CR2 },
501 { 3, CR3 },
502 { 83, CR1 },
503 { 166, CR2 },
504 { 0, CR3 },
505 };
506
507 struct delayval nldelay[] = {
508 { 1, NL1 }, /* special, calculated */
509 { 2, NL2 },
510 { 3, NL3 },
511 { 100, NL2 },
512 { 0, NL3 },
513 };
514
515 struct delayval bsdelay[] = {
516 { 1, BS1 },
517 { 0, 0 },
518 };
519
520 struct delayval ffdelay[] = {
521 { 1, FF1 },
522 { 1750, FF1 },
523 { 0, FF1 },
524 };
525
526 struct delayval tbdelay[] = {
527 { 1, TAB1 },
528 { 2, TAB2 },
529 { 3, XTABS }, /* this is expand tabs */
530 { 100, TAB1 },
531 { 0, TAB2 },
532 };
533
534 int
535 delaybits()
536 {
537 register int f;
538
539 f = adelay(CD, crdelay);
540 f |= adelay(ND, nldelay);
541 f |= adelay(FD, ffdelay);
542 f |= adelay(TD, tbdelay);
543 f |= adelay(BD, bsdelay);
544 return (f);
545 }
546
547 int
548 adelay(ms, dp)
549 register ms;
550 register struct delayval *dp;
551 {
552 if (ms == 0)
553 return (0);
554 while (dp->delay && ms > dp->delay)
555 dp++;
556 return (dp->bits);
557 }
558 #endif
559
560 char editedhost[32];
561
562 void
563 edithost(pat)
564 register char *pat;
565 {
566 register char *host = HN;
567 register char *res = editedhost;
568
569 if (!pat)
570 pat = "";
571 while (*pat) {
572 switch (*pat) {
573
574 case '#':
575 if (*host)
576 host++;
577 break;
578
579 case '@':
580 if (*host)
581 *res++ = *host++;
582 break;
583
584 default:
585 *res++ = *pat;
586 break;
587
588 }
589 if (res == &editedhost[sizeof editedhost - 1]) {
590 *res = '\0';
591 return;
592 }
593 pat++;
594 }
595 if (*host)
596 strncpy(res, host, sizeof editedhost - (res - editedhost) - 1);
597 else
598 *res = '\0';
599 editedhost[sizeof editedhost - 1] = '\0';
600 }
601
602 void
603 makeenv(env)
604 char *env[];
605 {
606 static char termbuf[128] = "TERM=";
607 register char *p, *q;
608 register char **ep;
609
610 ep = env;
611 if (TT && *TT) {
612 strcat(termbuf, TT);
613 *ep++ = termbuf;
614 }
615 if (p = EV) {
616 q = p;
617 while (q = strchr(q, ',')) {
618 *q++ = '\0';
619 *ep++ = p;
620 p = q;
621 }
622 if (*p)
623 *ep++ = p;
624 }
625 *ep = (char *)0;
626 }
627
628 /*
629 * This speed select mechanism is written for the Develcon DATASWITCH.
630 * The Develcon sends a string of the form "B{speed}\n" at a predefined
631 * baud rate. This string indicates the user's actual speed.
632 * The routine below returns the terminal type mapped from derived speed.
633 */
634 struct portselect {
635 char *ps_baud;
636 char *ps_type;
637 } portspeeds[] = {
638 { "B110", "std.110" },
639 { "B134", "std.134" },
640 { "B150", "std.150" },
641 { "B300", "std.300" },
642 { "B600", "std.600" },
643 { "B1200", "std.1200" },
644 { "B2400", "std.2400" },
645 { "B4800", "std.4800" },
646 { "B9600", "std.9600" },
647 { "B19200", "std.19200" },
648 { 0 }
649 };
650
651 char *
652 portselector()
653 {
654 char c, baud[20], *type = "default";
655 register struct portselect *ps;
656 int len;
657
658 alarm(5*60);
659 for (len = 0; len < sizeof (baud) - 1; len++) {
660 if (read(STDIN_FILENO, &c, 1) <= 0)
661 break;
662 c &= 0177;
663 if (c == '\n' || c == '\r')
664 break;
665 if (c == 'B')
666 len = 0; /* in case of leading garbage */
667 baud[len] = c;
668 }
669 baud[len] = '\0';
670 for (ps = portspeeds; ps->ps_baud; ps++)
671 if (strcmp(ps->ps_baud, baud) == 0) {
672 type = ps->ps_type;
673 break;
674 }
675 sleep(2); /* wait for connection to complete */
676 return (type);
677 }
678
679 /*
680 * This auto-baud speed select mechanism is written for the Micom 600
681 * portselector. Selection is done by looking at how the character '\r'
682 * is garbled at the different speeds.
683 */
684 #include <sys/time.h>
685
686 char *
687 autobaud()
688 {
689 int rfds;
690 struct timeval timeout;
691 char c, *type = "9600-baud";
692
693 (void)tcflush(0, TCIOFLUSH);
694 rfds = 1 << 0;
695 timeout.tv_sec = 5;
696 timeout.tv_usec = 0;
697 if (select(32, (fd_set *)&rfds, (fd_set *)NULL,
698 (fd_set *)NULL, &timeout) <= 0)
699 return (type);
700 if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char))
701 return (type);
702 timeout.tv_sec = 0;
703 timeout.tv_usec = 20;
704 (void) select(32, (fd_set *)NULL, (fd_set *)NULL,
705 (fd_set *)NULL, &timeout);
706 (void)tcflush(0, TCIOFLUSH);
707 switch (c & 0377) {
708
709 case 0200: /* 300-baud */
710 type = "300-baud";
711 break;
712
713 case 0346: /* 1200-baud */
714 type = "1200-baud";
715 break;
716
717 case 015: /* 2400-baud */
718 case 0215:
719 type = "2400-baud";
720 break;
721
722 default: /* 4800-baud */
723 type = "4800-baud";
724 break;
725
726 case 0377: /* 9600-baud */
727 type = "9600-baud";
728 break;
729 }
730 return (type);
731 }
732