subr.c revision 1.22 1 /* $NetBSD: subr.c,v 1.22 1997/08/06 07:22:26 mikel 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 #include <sys/cdefs.h>
37 #ifndef lint
38 #if 0
39 static char sccsid[] = "from: @(#)subr.c 8.1 (Berkeley) 6/4/93";
40 #else
41 __RCSID("$NetBSD: subr.c,v 1.22 1997/08/06 07:22:26 mikel Exp $");
42 #endif
43 #endif /* not lint */
44
45 /*
46 * Melbourne getty.
47 */
48 #define COMPAT_43
49 #include <sys/param.h>
50 #include <sys/ioctl.h>
51
52 #include <stdlib.h>
53 #include <string.h>
54 #include <termios.h>
55 #include <unistd.h>
56
57 #include "extern.h"
58 #include "gettytab.h"
59 #include "pathnames.h"
60
61 extern struct termios tmode, omode;
62
63 static void compatflags __P((long));
64
65 /*
66 * Get a table entry.
67 */
68 void
69 gettable(name, buf)
70 char *name, *buf;
71 {
72 register struct gettystrs *sp;
73 register struct gettynums *np;
74 register struct gettyflags *fp;
75 long n;
76 char *dba[2];
77 dba[0] = _PATH_GETTYTAB;
78 dba[1] = 0;
79
80 if (cgetent(&buf, dba, name) != 0)
81 return;
82
83 for (sp = gettystrs; sp->field; sp++)
84 cgetstr(buf, sp->field, &sp->value);
85 for (np = gettynums; np->field; np++) {
86 if (cgetnum(buf, np->field, &n) == -1)
87 np->set = 0;
88 else {
89 np->set = 1;
90 np->value = n;
91 }
92 }
93 for (fp = gettyflags; fp->field; fp++) {
94 if (cgetcap(buf, fp->field, ':') == NULL)
95 fp->set = 0;
96 else {
97 fp->set = 1;
98 fp->value = 1 ^ fp->invrt;
99 }
100 }
101 #ifdef DEBUG
102 printf("name=\"%s\", buf=\"%s\"\n", name, buf);
103 for (sp = gettystrs; sp->field; sp++)
104 printf("cgetstr: %s=%s\n", sp->field, sp->value);
105 for (np = gettynums; np->field; np++)
106 printf("cgetnum: %s=%d\n", np->field, np->value);
107 for (fp = gettyflags; fp->field; fp++)
108 printf("cgetflags: %s='%c' set='%c'\n", fp->field,
109 fp->value + '0', fp->set + '0');
110 exit(1);
111 #endif /* DEBUG */
112 }
113
114 void
115 gendefaults()
116 {
117 register struct gettystrs *sp;
118 register struct gettynums *np;
119 register struct gettyflags *fp;
120
121 for (sp = gettystrs; sp->field; sp++)
122 if (sp->value)
123 sp->defalt = sp->value;
124 for (np = gettynums; np->field; np++)
125 if (np->set)
126 np->defalt = np->value;
127 for (fp = gettyflags; fp->field; fp++)
128 if (fp->set)
129 fp->defalt = fp->value;
130 else
131 fp->defalt = fp->invrt;
132 }
133
134 void
135 setdefaults()
136 {
137 register struct gettystrs *sp;
138 register struct gettynums *np;
139 register struct gettyflags *fp;
140
141 for (sp = gettystrs; sp->field; sp++)
142 if (!sp->value)
143 sp->value = sp->defalt;
144 for (np = gettynums; np->field; np++)
145 if (!np->set)
146 np->value = np->defalt;
147 for (fp = gettyflags; fp->field; fp++)
148 if (!fp->set)
149 fp->value = fp->defalt;
150 }
151
152 static char **
153 charnames[] = {
154 &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK,
155 &SU, &DS, &RP, &FL, &WE, &LN, 0
156 };
157
158 static char *
159 charvars[] = {
160 &tmode.c_cc[VERASE], &tmode.c_cc[VKILL], &tmode.c_cc[VINTR],
161 &tmode.c_cc[VQUIT], &tmode.c_cc[VSTART], &tmode.c_cc[VSTOP],
162 &tmode.c_cc[VEOF], &tmode.c_cc[VEOL], &tmode.c_cc[VSUSP],
163 &tmode.c_cc[VDSUSP], &tmode.c_cc[VREPRINT], &tmode.c_cc[VDISCARD],
164 &tmode.c_cc[VWERASE], &tmode.c_cc[VLNEXT], 0
165 };
166
167 void
168 setchars()
169 {
170 register int i;
171 register char *p;
172
173 for (i = 0; charnames[i]; i++) {
174 p = *charnames[i];
175 if (p && *p)
176 *charvars[i] = *p;
177 else
178 *charvars[i] = _POSIX_VDISABLE;
179 }
180 }
181
182 /* Macros to clear/set/test flags. */
183 #define SET(t, f) (t) |= (f)
184 #define CLR(t, f) (t) &= ~(f)
185 #define ISSET(t, f) ((t) & (f))
186
187 void
188 setflags(n)
189 int n;
190 {
191 register tcflag_t iflag, oflag, cflag, lflag;
192
193 #ifdef COMPAT_43
194 switch (n) {
195 case 0:
196 if (F0set) {
197 compatflags(F0);
198 return;
199 }
200 break;
201 case 1:
202 if (F1set) {
203 compatflags(F1);
204 return;
205 }
206 break;
207 default:
208 if (F2set) {
209 compatflags(F2);
210 return;
211 }
212 break;
213 }
214 #endif
215
216 switch (n) {
217 case 0:
218 if (C0set && I0set && L0set && O0set) {
219 tmode.c_cflag = C0;
220 tmode.c_iflag = I0;
221 tmode.c_lflag = L0;
222 tmode.c_oflag = O0;
223 return;
224 }
225 break;
226 case 1:
227 if (C1set && I1set && L1set && O1set) {
228 tmode.c_cflag = C1;
229 tmode.c_iflag = I1;
230 tmode.c_lflag = L1;
231 tmode.c_oflag = O1;
232 return;
233 }
234 break;
235 default:
236 if (C2set && I2set && L2set && O2set) {
237 tmode.c_cflag = C2;
238 tmode.c_iflag = I2;
239 tmode.c_lflag = L2;
240 tmode.c_oflag = O2;
241 return;
242 }
243 break;
244 }
245
246 iflag = omode.c_iflag;
247 oflag = omode.c_oflag;
248 cflag = omode.c_cflag;
249 lflag = omode.c_lflag;
250
251 if (NP) {
252 CLR(cflag, CSIZE|PARENB);
253 SET(cflag, CS8);
254 CLR(iflag, ISTRIP|INPCK|IGNPAR);
255 } else if (AP || EP || OP) {
256 CLR(cflag, CSIZE);
257 SET(cflag, CS7|PARENB);
258 SET(iflag, ISTRIP);
259 if (OP && !EP) {
260 SET(iflag, INPCK|IGNPAR);
261 SET(cflag, PARODD);
262 if (AP)
263 CLR(iflag, INPCK);
264 } else if (EP && !OP) {
265 SET(iflag, INPCK|IGNPAR);
266 CLR(cflag, PARODD);
267 if (AP)
268 CLR(iflag, INPCK);
269 } else if (AP || (EP && OP)) {
270 CLR(iflag, INPCK|IGNPAR);
271 CLR(cflag, PARODD);
272 }
273 } /* else, leave as is */
274
275 #if 0
276 if (UC)
277 f |= LCASE;
278 #endif
279
280 if (HC)
281 SET(cflag, HUPCL);
282 else
283 CLR(cflag, HUPCL);
284
285 if (MB)
286 SET(cflag, MDMBUF);
287 else
288 CLR(cflag, MDMBUF);
289
290 if (NL) {
291 SET(iflag, ICRNL);
292 SET(oflag, ONLCR|OPOST);
293 } else {
294 CLR(iflag, ICRNL);
295 CLR(oflag, ONLCR);
296 }
297
298 if (!HT)
299 SET(oflag, OXTABS|OPOST);
300 else
301 CLR(oflag, OXTABS);
302
303 #ifdef XXX_DELAY
304 SET(f, delaybits());
305 #endif
306
307 if (n == 1) { /* read mode flags */
308 if (RW) {
309 iflag = 0;
310 CLR(oflag, OPOST);
311 CLR(cflag, CSIZE|PARENB);
312 SET(cflag, CS8);
313 lflag = 0;
314 } else {
315 CLR(lflag, ICANON);
316 }
317 goto out;
318 }
319
320 if (n == 0)
321 goto out;
322
323 #if 0
324 if (CB)
325 SET(f, CRTBS);
326 #endif
327
328 if (CE)
329 SET(lflag, ECHOE);
330 else
331 CLR(lflag, ECHOE);
332
333 if (CK)
334 SET(lflag, ECHOKE);
335 else
336 CLR(lflag, ECHOKE);
337
338 if (PE)
339 SET(lflag, ECHOPRT);
340 else
341 CLR(lflag, ECHOPRT);
342
343 if (EC)
344 SET(lflag, ECHO);
345 else
346 CLR(lflag, ECHO);
347
348 if (XC)
349 SET(lflag, ECHOCTL);
350 else
351 CLR(lflag, ECHOCTL);
352
353 if (DX)
354 SET(lflag, IXANY);
355 else
356 CLR(lflag, IXANY);
357
358 out:
359 tmode.c_iflag = iflag;
360 tmode.c_oflag = oflag;
361 tmode.c_cflag = cflag;
362 tmode.c_lflag = lflag;
363 }
364
365 #ifdef COMPAT_43
366 /*
367 * Old TTY => termios, snatched from <sys/kern/tty_compat.c>
368 */
369 void
370 compatflags(flags)
371 register long flags;
372 {
373 register tcflag_t iflag, oflag, cflag, lflag;
374
375 iflag = BRKINT|ICRNL|IMAXBEL|IXON|IXANY;
376 oflag = OPOST|ONLCR|OXTABS;
377 cflag = CREAD;
378 lflag = ICANON|ISIG|IEXTEN;
379
380 if (ISSET(flags, TANDEM))
381 SET(iflag, IXOFF);
382 else
383 CLR(iflag, IXOFF);
384 if (ISSET(flags, ECHO))
385 SET(lflag, ECHO);
386 else
387 CLR(lflag, ECHO);
388 if (ISSET(flags, CRMOD)) {
389 SET(iflag, ICRNL);
390 SET(oflag, ONLCR);
391 } else {
392 CLR(iflag, ICRNL);
393 CLR(oflag, ONLCR);
394 }
395 if (ISSET(flags, XTABS))
396 SET(oflag, OXTABS);
397 else
398 CLR(oflag, OXTABS);
399
400
401 if (ISSET(flags, RAW)) {
402 iflag &= IXOFF;
403 CLR(lflag, ISIG|ICANON|IEXTEN);
404 CLR(cflag, PARENB);
405 } else {
406 SET(iflag, BRKINT|IXON|IMAXBEL);
407 SET(lflag, ISIG|IEXTEN);
408 if (ISSET(flags, CBREAK))
409 CLR(lflag, ICANON);
410 else
411 SET(lflag, ICANON);
412 switch (ISSET(flags, ANYP)) {
413 case 0:
414 CLR(cflag, PARENB);
415 break;
416 case ANYP:
417 SET(cflag, PARENB);
418 CLR(iflag, INPCK);
419 break;
420 case EVENP:
421 SET(cflag, PARENB);
422 SET(iflag, INPCK);
423 CLR(cflag, PARODD);
424 break;
425 case ODDP:
426 SET(cflag, PARENB);
427 SET(iflag, INPCK);
428 SET(cflag, PARODD);
429 break;
430 }
431 }
432
433 /* Nothing we can do with CRTBS. */
434 if (ISSET(flags, PRTERA))
435 SET(lflag, ECHOPRT);
436 else
437 CLR(lflag, ECHOPRT);
438 if (ISSET(flags, CRTERA))
439 SET(lflag, ECHOE);
440 else
441 CLR(lflag, ECHOE);
442 /* Nothing we can do with TILDE. */
443 if (ISSET(flags, MDMBUF))
444 SET(cflag, MDMBUF);
445 else
446 CLR(cflag, MDMBUF);
447 if (ISSET(flags, NOHANG))
448 CLR(cflag, HUPCL);
449 else
450 SET(cflag, HUPCL);
451 if (ISSET(flags, CRTKIL))
452 SET(lflag, ECHOKE);
453 else
454 CLR(lflag, ECHOKE);
455 if (ISSET(flags, CTLECH))
456 SET(lflag, ECHOCTL);
457 else
458 CLR(lflag, ECHOCTL);
459 if (!ISSET(flags, DECCTQ))
460 SET(iflag, IXANY);
461 else
462 CLR(iflag, IXANY);
463 CLR(lflag, TOSTOP|FLUSHO|PENDIN|NOFLSH);
464 SET(lflag, ISSET(flags, TOSTOP|FLUSHO|PENDIN|NOFLSH));
465
466 if (ISSET(flags, RAW|LITOUT|PASS8)) {
467 CLR(cflag, CSIZE);
468 SET(cflag, CS8);
469 if (!ISSET(flags, RAW|PASS8))
470 SET(iflag, ISTRIP);
471 else
472 CLR(iflag, ISTRIP);
473 if (!ISSET(flags, RAW|LITOUT))
474 SET(oflag, OPOST);
475 else
476 CLR(oflag, OPOST);
477 } else {
478 CLR(cflag, CSIZE);
479 SET(cflag, CS7);
480 SET(iflag, ISTRIP);
481 SET(oflag, OPOST);
482 }
483
484 tmode.c_iflag = iflag;
485 tmode.c_oflag = oflag;
486 tmode.c_cflag = cflag;
487 tmode.c_lflag = lflag;
488 }
489 #endif
490
491 #ifdef XXX_DELAY
492 struct delayval {
493 unsigned delay; /* delay in ms */
494 int bits;
495 };
496
497 /*
498 * below are random guesses, I can't be bothered checking
499 */
500
501 struct delayval crdelay[] = {
502 { 1, CR1 },
503 { 2, CR2 },
504 { 3, CR3 },
505 { 83, CR1 },
506 { 166, CR2 },
507 { 0, CR3 },
508 };
509
510 struct delayval nldelay[] = {
511 { 1, NL1 }, /* special, calculated */
512 { 2, NL2 },
513 { 3, NL3 },
514 { 100, NL2 },
515 { 0, NL3 },
516 };
517
518 struct delayval bsdelay[] = {
519 { 1, BS1 },
520 { 0, 0 },
521 };
522
523 struct delayval ffdelay[] = {
524 { 1, FF1 },
525 { 1750, FF1 },
526 { 0, FF1 },
527 };
528
529 struct delayval tbdelay[] = {
530 { 1, TAB1 },
531 { 2, TAB2 },
532 { 3, XTABS }, /* this is expand tabs */
533 { 100, TAB1 },
534 { 0, TAB2 },
535 };
536
537 int
538 delaybits()
539 {
540 register int f;
541
542 f = adelay(CD, crdelay);
543 f |= adelay(ND, nldelay);
544 f |= adelay(FD, ffdelay);
545 f |= adelay(TD, tbdelay);
546 f |= adelay(BD, bsdelay);
547 return (f);
548 }
549
550 int
551 adelay(ms, dp)
552 register ms;
553 register struct delayval *dp;
554 {
555 if (ms == 0)
556 return (0);
557 while (dp->delay && ms > dp->delay)
558 dp++;
559 return (dp->bits);
560 }
561 #endif
562
563 char editedhost[MAXHOSTNAMELEN];
564
565 void
566 edithost(pat)
567 register char *pat;
568 {
569 register char *host = HN;
570 register char *res = editedhost;
571
572 if (!pat)
573 pat = "";
574 while (*pat) {
575 switch (*pat) {
576
577 case '#':
578 if (*host)
579 host++;
580 break;
581
582 case '@':
583 if (*host)
584 *res++ = *host++;
585 break;
586
587 default:
588 *res++ = *pat;
589 break;
590
591 }
592 if (res == &editedhost[sizeof editedhost - 1]) {
593 *res = '\0';
594 return;
595 }
596 pat++;
597 }
598 if (*host)
599 strncpy(res, host, sizeof editedhost - (res - editedhost) - 1);
600 else
601 *res = '\0';
602 editedhost[sizeof editedhost - 1] = '\0';
603 }
604
605 void
606 makeenv(env)
607 char *env[];
608 {
609 static char termbuf[128] = "TERM=";
610 register char *p, *q;
611 register char **ep;
612
613 ep = env;
614 if (TT && *TT) {
615 strncat(termbuf, TT, 128);
616 termbuf[127] = (char)NULL;
617 *ep++ = termbuf;
618 }
619 if ((p = EV) != NULL) {
620 q = p;
621 while ((q = strchr(q, ',')) != NULL) {
622 *q++ = '\0';
623 *ep++ = p;
624 p = q;
625 }
626 if (*p)
627 *ep++ = p;
628 }
629 *ep = (char *)0;
630 }
631
632 /*
633 * This speed select mechanism is written for the Develcon DATASWITCH.
634 * The Develcon sends a string of the form "B{speed}\n" at a predefined
635 * baud rate. This string indicates the user's actual speed.
636 * The routine below returns the terminal type mapped from derived speed.
637 */
638 struct portselect {
639 char *ps_baud;
640 char *ps_type;
641 } portspeeds[] = {
642 { "B110", "std.110" },
643 { "B134", "std.134" },
644 { "B150", "std.150" },
645 { "B300", "std.300" },
646 { "B600", "std.600" },
647 { "B1200", "std.1200" },
648 { "B2400", "std.2400" },
649 { "B4800", "std.4800" },
650 { "B9600", "std.9600" },
651 { "B19200", "std.19200" },
652 { 0 }
653 };
654
655 char *
656 portselector()
657 {
658 char c, baud[20], *type = "default";
659 register struct portselect *ps;
660 int len;
661
662 alarm(5*60);
663 for (len = 0; len < sizeof (baud) - 1; len++) {
664 if (read(STDIN_FILENO, &c, 1) <= 0)
665 break;
666 c &= 0177;
667 if (c == '\n' || c == '\r')
668 break;
669 if (c == 'B')
670 len = 0; /* in case of leading garbage */
671 baud[len] = c;
672 }
673 baud[len] = '\0';
674 for (ps = portspeeds; ps->ps_baud; ps++)
675 if (strcmp(ps->ps_baud, baud) == 0) {
676 type = ps->ps_type;
677 break;
678 }
679 sleep(2); /* wait for connection to complete */
680 return (type);
681 }
682
683 /*
684 * This auto-baud speed select mechanism is written for the Micom 600
685 * portselector. Selection is done by looking at how the character '\r'
686 * is garbled at the different speeds.
687 */
688 #include <sys/time.h>
689
690 char *
691 autobaud()
692 {
693 int rfds;
694 struct timeval timeout;
695 char c, *type = "9600-baud";
696
697 (void)tcflush(0, TCIOFLUSH);
698 rfds = 1 << 0;
699 timeout.tv_sec = 5;
700 timeout.tv_usec = 0;
701 if (select(32, (fd_set *)&rfds, (fd_set *)NULL,
702 (fd_set *)NULL, &timeout) <= 0)
703 return (type);
704 if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char))
705 return (type);
706 timeout.tv_sec = 0;
707 timeout.tv_usec = 20;
708 (void) select(32, (fd_set *)NULL, (fd_set *)NULL,
709 (fd_set *)NULL, &timeout);
710 (void)tcflush(0, TCIOFLUSH);
711 switch (c & 0377) {
712
713 case 0200: /* 300-baud */
714 type = "300-baud";
715 break;
716
717 case 0346: /* 1200-baud */
718 type = "1200-baud";
719 break;
720
721 case 015: /* 2400-baud */
722 case 0215:
723 type = "2400-baud";
724 break;
725
726 default: /* 4800-baud */
727 type = "4800-baud";
728 break;
729
730 case 0377: /* 9600-baud */
731 type = "9600-baud";
732 break;
733 }
734 return (type);
735 }
736