1/*	$NetBSD: subr.c,v 1.34 2013/08/11 05:42:41 dholland 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. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34#if 0
35static char sccsid[] = "from: @(#)subr.c	8.1 (Berkeley) 6/4/93";
36#else
37__RCSID("$NetBSD: subr.c,v 1.34 2013/08/11 05:42:41 dholland Exp $");
38#endif
39#endif /* not lint */
40
41/*
42 * Melbourne getty.
43 */
44#define COMPAT_43
45#include <sys/param.h>
46#include <sys/ioctl.h>
47
48#include <stdlib.h>
49#include <string.h>
50#include <termios.h>
51#include <unistd.h>
52#include <poll.h>
53#include <util.h>
54
55#include "extern.h"
56#include "gettytab.h"
57#include "pathnames.h"
58
59extern	struct termios tmode, omode;
60
61static void	compatflags(long);
62
63/*
64 * Get a table entry.
65 */
66void
67gettable(const char *name, char *buf)
68{
69	struct gettystrs *sp;
70	struct gettynums *np;
71	struct gettyflags *fp;
72	long n;
73	const char *dba[2];
74	dba[0] = _PATH_GETTYTAB;
75	dba[1] = NULL;
76
77	if (cgetent(&buf, dba, name) != 0)
78		return;
79
80	for (sp = gettystrs; sp->field; sp++)
81		(void)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
111void
112gendefaults(void)
113{
114	struct gettystrs *sp;
115	struct gettynums *np;
116	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
131void
132setdefaults(void)
133{
134	struct gettystrs *sp;
135	struct gettynums *np;
136	struct gettyflags *fp;
137
138	for (sp = gettystrs; sp->field; sp++)
139		if (!sp->value)
140			sp->value = sp->defalt ? estrdup(sp->defalt) : NULL;
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
149static char **
150charnames[] = {
151	&ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK,
152	&SU, &DS, &RP, &FL, &WE, &LN, &ST, &B2, 0
153};
154
155static cc_t *
156charvars[] = {
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], &tmode.c_cc[VSTATUS],
162	&tmode.c_cc[VEOL2], 0
163};
164
165void
166setchars(void)
167{
168	int i;
169	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
185void
186setflags(int n)
187{
188	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
355out:
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 */
366void
367compatflags(long flags)
368{
369	tcflag_t iflag, oflag, cflag, lflag;
370
371	iflag = BRKINT|ICRNL|IMAXBEL|IXON|IXANY;
372	oflag = OPOST|ONLCR|OXTABS;
373	cflag = CREAD;
374	lflag = ICANON|ISIG|IEXTEN;
375
376	if (ISSET(flags, TANDEM))
377		SET(iflag, IXOFF);
378	else
379		CLR(iflag, IXOFF);
380	if (ISSET(flags, ECHO))
381		SET(lflag, ECHO);
382	else
383		CLR(lflag, ECHO);
384	if (ISSET(flags, CRMOD)) {
385		SET(iflag, ICRNL);
386		SET(oflag, ONLCR);
387	} else {
388		CLR(iflag, ICRNL);
389		CLR(oflag, ONLCR);
390	}
391	if (ISSET(flags, XTABS))
392		SET(oflag, OXTABS);
393	else
394		CLR(oflag, OXTABS);
395
396
397	if (ISSET(flags, RAW)) {
398		iflag &= IXOFF;
399		CLR(lflag, ISIG|ICANON|IEXTEN);
400		CLR(cflag, PARENB);
401	} else {
402		SET(iflag, BRKINT|IXON|IMAXBEL);
403		SET(lflag, ISIG|IEXTEN);
404		if (ISSET(flags, CBREAK))
405			CLR(lflag, ICANON);
406		else
407			SET(lflag, ICANON);
408		switch (ISSET(flags, ANYP)) {
409		case 0:
410			CLR(cflag, PARENB);
411			break;
412		case ANYP:
413			SET(cflag, PARENB);
414			CLR(iflag, INPCK);
415			break;
416		case EVENP:
417			SET(cflag, PARENB);
418			SET(iflag, INPCK);
419			CLR(cflag, PARODD);
420			break;
421		case ODDP:
422			SET(cflag, PARENB);
423			SET(iflag, INPCK);
424			SET(cflag, PARODD);
425			break;
426		}
427	}
428
429	/* Nothing we can do with CRTBS. */
430	if (ISSET(flags, PRTERA))
431		SET(lflag, ECHOPRT);
432	else
433		CLR(lflag, ECHOPRT);
434	if (ISSET(flags, CRTERA))
435		SET(lflag, ECHOE);
436	else
437		CLR(lflag, ECHOE);
438	/* Nothing we can do with TILDE. */
439	if (ISSET(flags, MDMBUF))
440		SET(cflag, MDMBUF);
441	else
442		CLR(cflag, MDMBUF);
443	if (ISSET(flags, NOHANG))
444		CLR(cflag, HUPCL);
445	else
446		SET(cflag, HUPCL);
447	if (ISSET(flags, CRTKIL))
448		SET(lflag, ECHOKE);
449	else
450		CLR(lflag, ECHOKE);
451	if (ISSET(flags, CTLECH))
452		SET(lflag, ECHOCTL);
453	else
454		CLR(lflag, ECHOCTL);
455	if (!ISSET(flags, DECCTQ))
456		SET(iflag, IXANY);
457	else
458		CLR(iflag, IXANY);
459	CLR(lflag, TOSTOP|FLUSHO|PENDIN|NOFLSH);
460	SET(lflag, ISSET(flags, TOSTOP|FLUSHO|PENDIN|NOFLSH));
461
462	if (ISSET(flags, RAW|LITOUT|PASS8)) {
463		CLR(cflag, CSIZE);
464		SET(cflag, CS8);
465		if (!ISSET(flags, RAW|PASS8))
466			SET(iflag, ISTRIP);
467		else
468			CLR(iflag, ISTRIP);
469		if (!ISSET(flags, RAW|LITOUT))
470			SET(oflag, OPOST);
471		else
472			CLR(oflag, OPOST);
473	} else {
474		CLR(cflag, CSIZE);
475		SET(cflag, CS7);
476		SET(iflag, ISTRIP);
477		SET(oflag, OPOST);
478	}
479
480	tmode.c_iflag = iflag;
481	tmode.c_oflag = oflag;
482	tmode.c_cflag = cflag;
483	tmode.c_lflag = lflag;
484}
485#endif
486
487#ifdef XXX_DELAY
488struct delayval {
489	unsigned	delay;		/* delay in ms */
490	int		bits;
491};
492
493/*
494 * below are random guesses, I can't be bothered checking
495 */
496
497struct delayval	crdelay[] = {
498	{ 1,		CR1 },
499	{ 2,		CR2 },
500	{ 3,		CR3 },
501	{ 83,		CR1 },
502	{ 166,		CR2 },
503	{ 0,		CR3 },
504};
505
506struct delayval nldelay[] = {
507	{ 1,		NL1 },		/* special, calculated */
508	{ 2,		NL2 },
509	{ 3,		NL3 },
510	{ 100,		NL2 },
511	{ 0,		NL3 },
512};
513
514struct delayval	bsdelay[] = {
515	{ 1,		BS1 },
516	{ 0,		0 },
517};
518
519struct delayval	ffdelay[] = {
520	{ 1,		FF1 },
521	{ 1750,		FF1 },
522	{ 0,		FF1 },
523};
524
525struct delayval	tbdelay[] = {
526	{ 1,		 TAB1 },
527	{ 2,		 TAB2 },
528	{ 3,		XTABS },	/* this is expand tabs */
529	{ 100,		 TAB1 },
530	{ 0,		 TAB2 },
531};
532
533int
534delaybits(void)
535{
536	int f;
537
538	f  = adelay(CD, crdelay);
539	f |= adelay(ND, nldelay);
540	f |= adelay(FD, ffdelay);
541	f |= adelay(TD, tbdelay);
542	f |= adelay(BD, bsdelay);
543	return (f);
544}
545
546int
547adelay(int ms, struct delayval *dp)
548{
549	if (ms == 0)
550		return (0);
551	while (dp->delay && ms > dp->delay)
552		dp++;
553	return (dp->bits);
554}
555#endif
556
557char	editedhost[MAXHOSTNAMELEN];
558
559void
560edithost(const char *pat)
561{
562	char *host = HN;
563	char *res = editedhost;
564
565	if (!pat)
566		pat = "";
567	while (*pat) {
568		switch (*pat) {
569
570		case '#':
571			if (*host)
572				host++;
573			break;
574
575		case '@':
576			if (*host)
577				*res++ = *host++;
578			break;
579
580		default:
581			*res++ = *pat;
582			break;
583
584		}
585		if (res == &editedhost[sizeof editedhost - 1]) {
586			*res = '\0';
587			return;
588		}
589		pat++;
590	}
591	if (*host)
592		(void)strncpy(res, host,
593		    sizeof editedhost - (res - editedhost) - 1);
594	else
595		*res = '\0';
596	editedhost[sizeof editedhost - 1] = '\0';
597}
598
599void
600makeenv(char *env[])
601{
602	static char termbuf[128] = "TERM=";
603	char *p, *q;
604	char **ep;
605
606	ep = env;
607	if (TT && *TT) {
608		(void)strlcat(termbuf, TT, sizeof(termbuf));
609		*ep++ = termbuf;
610	}
611	if ((p = EV) != NULL) {
612		q = p;
613		while ((q = strchr(q, ',')) != NULL) {
614			*q++ = '\0';
615			*ep++ = p;
616			p = q;
617		}
618		if (*p)
619			*ep++ = p;
620	}
621	*ep = (char *)0;
622}
623
624/*
625 * This speed select mechanism is written for the Develcon DATASWITCH.
626 * The Develcon sends a string of the form "B{speed}\n" at a predefined
627 * baud rate. This string indicates the user's actual speed.
628 * The routine below returns the terminal type mapped from derived speed.
629 */
630struct	portselect {
631	const char *ps_baud;
632	const char *ps_type;
633} portspeeds[] = {
634	{ "B110",	"std.110" },
635	{ "B134",	"std.134" },
636	{ "B150",	"std.150" },
637	{ "B300",	"std.300" },
638	{ "B600",	"std.600" },
639	{ "B1200",	"std.1200" },
640	{ "B2400",	"std.2400" },
641	{ "B4800",	"std.4800" },
642	{ "B9600",	"std.9600" },
643	{ "B19200",	"std.19200" },
644	{ NULL, NULL }
645};
646
647const char *
648portselector(void)
649{
650	char c, baud[20];
651	const char *type = "default";
652	struct portselect *ps;
653	size_t len;
654
655	(void)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	(void)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
683const char *
684autobaud(void)
685{
686	struct pollfd set[1];
687	struct timespec timeout;
688	char c;
689	const char *type = "9600-baud";
690
691	(void)tcflush(0, TCIOFLUSH);
692	set[0].fd = STDIN_FILENO;
693	set[0].events = POLLIN;
694	if (poll(set, 1, 5000) <= 0)
695		return (type);
696	if (read(STDIN_FILENO, &c, 1) != 1)
697		return (type);
698	timeout.tv_sec = 0;
699	timeout.tv_nsec = 20000;
700	(void)nanosleep(&timeout, NULL);
701	(void)tcflush(0, TCIOFLUSH);
702	switch (c & 0377) {
703
704	case 0200:		/* 300-baud */
705		type = "300-baud";
706		break;
707
708	case 0346:		/* 1200-baud */
709		type = "1200-baud";
710		break;
711
712	case  015:		/* 2400-baud */
713	case 0215:
714		type = "2400-baud";
715		break;
716
717	default:		/* 4800-baud */
718		type = "4800-baud";
719		break;
720
721	case 0377:		/* 9600-baud */
722		type = "9600-baud";
723		break;
724	}
725	return (type);
726}
727