subr.c revision 1.26 1 /* $NetBSD: subr.c,v 1.26 2002/09/18 20:04:51 mycroft 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 1.26 2002/09/18 20:04:51 mycroft 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 #include <sys/poll.h>
52
53 #include <stdlib.h>
54 #include <string.h>
55 #include <termios.h>
56 #include <unistd.h>
57
58 #include "extern.h"
59 #include "gettytab.h"
60 #include "pathnames.h"
61
62 extern struct termios tmode, omode;
63
64 static void compatflags(long);
65
66 /*
67 * Get a table entry.
68 */
69 void
70 gettable(char *name, char *buf)
71 {
72 struct gettystrs *sp;
73 struct gettynums *np;
74 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(void)
116 {
117 struct gettystrs *sp;
118 struct gettynums *np;
119 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(void)
136 {
137 struct gettystrs *sp;
138 struct gettynums *np;
139 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(void)
169 {
170 int i;
171 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(int n)
189 {
190 tcflag_t iflag, oflag, cflag, lflag;
191
192 #ifdef COMPAT_43
193 switch (n) {
194 case 0:
195 if (F0set) {
196 compatflags(F0);
197 return;
198 }
199 break;
200 case 1:
201 if (F1set) {
202 compatflags(F1);
203 return;
204 }
205 break;
206 default:
207 if (F2set) {
208 compatflags(F2);
209 return;
210 }
211 break;
212 }
213 #endif
214
215 switch (n) {
216 case 0:
217 if (C0set && I0set && L0set && O0set) {
218 tmode.c_cflag = C0;
219 tmode.c_iflag = I0;
220 tmode.c_lflag = L0;
221 tmode.c_oflag = O0;
222 return;
223 }
224 break;
225 case 1:
226 if (C1set && I1set && L1set && O1set) {
227 tmode.c_cflag = C1;
228 tmode.c_iflag = I1;
229 tmode.c_lflag = L1;
230 tmode.c_oflag = O1;
231 return;
232 }
233 break;
234 default:
235 if (C2set && I2set && L2set && O2set) {
236 tmode.c_cflag = C2;
237 tmode.c_iflag = I2;
238 tmode.c_lflag = L2;
239 tmode.c_oflag = O2;
240 return;
241 }
242 break;
243 }
244
245 iflag = omode.c_iflag;
246 oflag = omode.c_oflag;
247 cflag = omode.c_cflag;
248 lflag = omode.c_lflag;
249
250 if (NP) {
251 CLR(cflag, CSIZE|PARENB);
252 SET(cflag, CS8);
253 CLR(iflag, ISTRIP|INPCK|IGNPAR);
254 } else if (AP || EP || OP) {
255 CLR(cflag, CSIZE);
256 SET(cflag, CS7|PARENB);
257 SET(iflag, ISTRIP);
258 if (OP && !EP) {
259 SET(iflag, INPCK|IGNPAR);
260 SET(cflag, PARODD);
261 if (AP)
262 CLR(iflag, INPCK);
263 } else if (EP && !OP) {
264 SET(iflag, INPCK|IGNPAR);
265 CLR(cflag, PARODD);
266 if (AP)
267 CLR(iflag, INPCK);
268 } else if (AP || (EP && OP)) {
269 CLR(iflag, INPCK|IGNPAR);
270 CLR(cflag, PARODD);
271 }
272 } /* else, leave as is */
273
274 #if 0
275 if (UC)
276 f |= LCASE;
277 #endif
278
279 if (HC)
280 SET(cflag, HUPCL);
281 else
282 CLR(cflag, HUPCL);
283
284 if (MB)
285 SET(cflag, MDMBUF);
286 else
287 CLR(cflag, MDMBUF);
288
289 if (NL) {
290 SET(iflag, ICRNL);
291 SET(oflag, ONLCR|OPOST);
292 } else {
293 CLR(iflag, ICRNL);
294 CLR(oflag, ONLCR);
295 }
296
297 if (!HT)
298 SET(oflag, OXTABS|OPOST);
299 else
300 CLR(oflag, OXTABS);
301
302 #ifdef XXX_DELAY
303 SET(f, delaybits());
304 #endif
305
306 if (n == 1) { /* read mode flags */
307 if (RW) {
308 iflag = 0;
309 CLR(oflag, OPOST);
310 CLR(cflag, CSIZE|PARENB);
311 SET(cflag, CS8);
312 lflag = 0;
313 } else {
314 CLR(lflag, ICANON);
315 }
316 goto out;
317 }
318
319 if (n == 0)
320 goto out;
321
322 #if 0
323 if (CB)
324 SET(f, CRTBS);
325 #endif
326
327 if (CE)
328 SET(lflag, ECHOE);
329 else
330 CLR(lflag, ECHOE);
331
332 if (CK)
333 SET(lflag, ECHOKE);
334 else
335 CLR(lflag, ECHOKE);
336
337 if (PE)
338 SET(lflag, ECHOPRT);
339 else
340 CLR(lflag, ECHOPRT);
341
342 if (EC)
343 SET(lflag, ECHO);
344 else
345 CLR(lflag, ECHO);
346
347 if (XC)
348 SET(lflag, ECHOCTL);
349 else
350 CLR(lflag, ECHOCTL);
351
352 if (DX)
353 SET(lflag, IXANY);
354 else
355 CLR(lflag, IXANY);
356
357 out:
358 tmode.c_iflag = iflag;
359 tmode.c_oflag = oflag;
360 tmode.c_cflag = cflag;
361 tmode.c_lflag = lflag;
362 }
363
364 #ifdef COMPAT_43
365 /*
366 * Old TTY => termios, snatched from <sys/kern/tty_compat.c>
367 */
368 void
369 compatflags(long flags)
370 {
371 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(void)
537 {
538 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(int ms, struct delayval *dp)
550 {
551 if (ms == 0)
552 return (0);
553 while (dp->delay && ms > dp->delay)
554 dp++;
555 return (dp->bits);
556 }
557 #endif
558
559 char editedhost[MAXHOSTNAMELEN];
560
561 void
562 edithost(char *pat)
563 {
564 char *host = HN;
565 char *res = editedhost;
566
567 if (!pat)
568 pat = "";
569 while (*pat) {
570 switch (*pat) {
571
572 case '#':
573 if (*host)
574 host++;
575 break;
576
577 case '@':
578 if (*host)
579 *res++ = *host++;
580 break;
581
582 default:
583 *res++ = *pat;
584 break;
585
586 }
587 if (res == &editedhost[sizeof editedhost - 1]) {
588 *res = '\0';
589 return;
590 }
591 pat++;
592 }
593 if (*host)
594 strncpy(res, host, sizeof editedhost - (res - editedhost) - 1);
595 else
596 *res = '\0';
597 editedhost[sizeof editedhost - 1] = '\0';
598 }
599
600 void
601 makeenv(char *env[])
602 {
603 static char termbuf[128] = "TERM=";
604 char *p, *q;
605 char **ep;
606
607 ep = env;
608 if (TT && *TT) {
609 strlcat(termbuf, TT, sizeof(termbuf));
610 *ep++ = termbuf;
611 }
612 if ((p = EV) != NULL) {
613 q = p;
614 while ((q = strchr(q, ',')) != NULL) {
615 *q++ = '\0';
616 *ep++ = p;
617 p = q;
618 }
619 if (*p)
620 *ep++ = p;
621 }
622 *ep = (char *)0;
623 }
624
625 /*
626 * This speed select mechanism is written for the Develcon DATASWITCH.
627 * The Develcon sends a string of the form "B{speed}\n" at a predefined
628 * baud rate. This string indicates the user's actual speed.
629 * The routine below returns the terminal type mapped from derived speed.
630 */
631 struct portselect {
632 char *ps_baud;
633 char *ps_type;
634 } portspeeds[] = {
635 { "B110", "std.110" },
636 { "B134", "std.134" },
637 { "B150", "std.150" },
638 { "B300", "std.300" },
639 { "B600", "std.600" },
640 { "B1200", "std.1200" },
641 { "B2400", "std.2400" },
642 { "B4800", "std.4800" },
643 { "B9600", "std.9600" },
644 { "B19200", "std.19200" },
645 { 0 }
646 };
647
648 char *
649 portselector(void)
650 {
651 char c, baud[20], *type = "default";
652 struct portselect *ps;
653 int len;
654
655 alarm(5*60);
656 for (len = 0; len < sizeof (baud) - 1; len++) {
657 if (read(STDIN_FILENO, &c, 1) <= 0)
658 break;
659 c &= 0177;
660 if (c == '\n' || c == '\r')
661 break;
662 if (c == 'B')
663 len = 0; /* in case of leading garbage */
664 baud[len] = c;
665 }
666 baud[len] = '\0';
667 for (ps = portspeeds; ps->ps_baud; ps++)
668 if (strcmp(ps->ps_baud, baud) == 0) {
669 type = ps->ps_type;
670 break;
671 }
672 sleep(2); /* wait for connection to complete */
673 return (type);
674 }
675
676 /*
677 * This auto-baud speed select mechanism is written for the Micom 600
678 * portselector. Selection is done by looking at how the character '\r'
679 * is garbled at the different speeds.
680 */
681 #include <sys/time.h>
682
683 char *
684 autobaud(void)
685 {
686 struct pollfd set[1];
687 struct timespec timeout;
688 char c, *type = "9600-baud";
689
690 (void)tcflush(0, TCIOFLUSH);
691 set[0].fd = STDIN_FILENO;
692 set[0].events = POLLIN;
693 if (poll(set, 1, 5000) <= 0)
694 return (type);
695 if (read(STDIN_FILENO, &c, 1) != 1)
696 return (type);
697 timeout.tv_sec = 0;
698 timeout.tv_nsec = 20000;
699 (void)nanosleep(&timeout, NULL);
700 (void)tcflush(0, TCIOFLUSH);
701 switch (c & 0377) {
702
703 case 0200: /* 300-baud */
704 type = "300-baud";
705 break;
706
707 case 0346: /* 1200-baud */
708 type = "1200-baud";
709 break;
710
711 case 015: /* 2400-baud */
712 case 0215:
713 type = "2400-baud";
714 break;
715
716 default: /* 4800-baud */
717 type = "4800-baud";
718 break;
719
720 case 0377: /* 9600-baud */
721 type = "9600-baud";
722 break;
723 }
724 return (type);
725 }
726