4.3BSD-Reno/src/libexec/getty/subr.c
/*
* Copyright (c) 1983 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)subr.c 5.7 (Berkeley) 6/1/90";
#endif /* not lint */
/*
* Melbourne getty.
*/
#define USE_OLD_TTY
#include <sgtty.h>
#include "gettytab.h"
extern struct sgttyb tmode;
extern struct tchars tc;
extern struct ltchars ltc;
/*
* Get a table entry.
*/
gettable(name, buf, area)
char *name, *buf, *area;
{
register struct gettystrs *sp;
register struct gettynums *np;
register struct gettyflags *fp;
register n;
hopcount = 0; /* new lookup, start fresh */
if (getent(buf, name) != 1)
return;
for (sp = gettystrs; sp->field; sp++)
sp->value = getstr(sp->field, &area);
for (np = gettynums; np->field; np++) {
n = getnum(np->field);
if (n == -1)
np->set = 0;
else {
np->set = 1;
np->value = n;
}
}
for (fp = gettyflags; fp->field; fp++) {
n = getflag(fp->field);
if (n == -1)
fp->set = 0;
else {
fp->set = 1;
fp->value = n ^ fp->invrt;
}
}
}
gendefaults()
{
register struct gettystrs *sp;
register struct gettynums *np;
register struct gettyflags *fp;
for (sp = gettystrs; sp->field; sp++)
if (sp->value)
sp->defalt = sp->value;
for (np = gettynums; np->field; np++)
if (np->set)
np->defalt = np->value;
for (fp = gettyflags; fp->field; fp++)
if (fp->set)
fp->defalt = fp->value;
else
fp->defalt = fp->invrt;
}
setdefaults()
{
register struct gettystrs *sp;
register struct gettynums *np;
register struct gettyflags *fp;
for (sp = gettystrs; sp->field; sp++)
if (!sp->value)
sp->value = sp->defalt;
for (np = gettynums; np->field; np++)
if (!np->set)
np->value = np->defalt;
for (fp = gettyflags; fp->field; fp++)
if (!fp->set)
fp->value = fp->defalt;
}
static char **
charnames[] = {
&ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK,
&SU, &DS, &RP, &FL, &WE, &LN, 0
};
static char *
charvars[] = {
&tmode.sg_erase, &tmode.sg_kill, &tc.t_intrc,
&tc.t_quitc, &tc.t_startc, &tc.t_stopc,
&tc.t_eofc, &tc.t_brkc, <c.t_suspc,
<c.t_dsuspc, <c.t_rprntc, <c.t_flushc,
<c.t_werasc, <c.t_lnextc, 0
};
setchars()
{
register int i;
register char *p;
for (i = 0; charnames[i]; i++) {
p = *charnames[i];
if (p && *p)
*charvars[i] = *p;
else
*charvars[i] = '\377';
}
}
long
setflags(n)
{
register long f;
switch (n) {
case 0:
if (F0set)
return(F0);
break;
case 1:
if (F1set)
return(F1);
break;
default:
if (F2set)
return(F2);
break;
}
f = 0;
if (AP)
f |= ANYP;
else if (OP)
f |= ODDP;
else if (EP)
f |= EVENP;
if (UC)
f |= LCASE;
if (NL)
f |= CRMOD;
f |= delaybits();
if (n == 1) { /* read mode flags */
if (RW)
f |= RAW;
else
f |= CBREAK;
return (f);
}
if (!HT)
f |= XTABS;
if (n == 0)
return (f);
if (CB)
f |= CRTBS;
if (CE)
f |= CRTERA;
if (CK)
f |= CRTKIL;
if (PE)
f |= PRTERA;
if (EC)
f |= ECHO;
if (XC)
f |= CTLECH;
if (DX)
f |= DECCTQ;
return (f);
}
struct delayval {
unsigned delay; /* delay in ms */
int bits;
};
/*
* below are random guesses, I can't be bothered checking
*/
struct delayval crdelay[] = {
1, CR1,
2, CR2,
3, CR3,
83, CR1,
166, CR2,
0, CR3,
};
struct delayval nldelay[] = {
1, NL1, /* special, calculated */
2, NL2,
3, NL3,
100, NL2,
0, NL3,
};
struct delayval bsdelay[] = {
1, BS1,
0, 0,
};
struct delayval ffdelay[] = {
1, FF1,
1750, FF1,
0, FF1,
};
struct delayval tbdelay[] = {
1, TAB1,
2, TAB2,
3, XTABS, /* this is expand tabs */
100, TAB1,
0, TAB2,
};
delaybits()
{
register f;
f = adelay(CD, crdelay);
f |= adelay(ND, nldelay);
f |= adelay(FD, ffdelay);
f |= adelay(TD, tbdelay);
f |= adelay(BD, bsdelay);
return (f);
}
adelay(ms, dp)
register ms;
register struct delayval *dp;
{
if (ms == 0)
return (0);
while (dp->delay && ms > dp->delay)
dp++;
return (dp->bits);
}
char editedhost[32];
edithost(pat)
register char *pat;
{
register char *host = HN;
register char *res = editedhost;
if (!pat)
pat = "";
while (*pat) {
switch (*pat) {
case '#':
if (*host)
host++;
break;
case '@':
if (*host)
*res++ = *host++;
break;
default:
*res++ = *pat;
break;
}
if (res == &editedhost[sizeof editedhost - 1]) {
*res = '\0';
return;
}
pat++;
}
if (*host)
strncpy(res, host, sizeof editedhost - (res - editedhost) - 1);
else
*res = '\0';
editedhost[sizeof editedhost - 1] = '\0';
}
struct speedtab {
int speed;
int uxname;
} speedtab[] = {
50, B50,
75, B75,
110, B110,
134, B134,
150, B150,
200, B200,
300, B300,
600, B600,
1200, B1200,
1800, B1800,
2400, B2400,
4800, B4800,
9600, B9600,
19200, EXTA,
19, EXTA, /* for people who say 19.2K */
38400, EXTB,
38, EXTB,
7200, EXTB, /* alternative */
0
};
speed(val)
{
register struct speedtab *sp;
if (val <= 15)
return (val);
for (sp = speedtab; sp->speed; sp++)
if (sp->speed == val)
return (sp->uxname);
return (B300); /* default in impossible cases */
}
makeenv(env)
char *env[];
{
static char termbuf[128] = "TERM=";
register char *p, *q;
register char **ep;
char *index();
ep = env;
if (TT && *TT) {
strcat(termbuf, TT);
*ep++ = termbuf;
}
if (p = EV) {
q = p;
while (q = index(q, ',')) {
*q++ = '\0';
*ep++ = p;
p = q;
}
if (*p)
*ep++ = p;
}
*ep = (char *)0;
}
/*
* This speed select mechanism is written for the Develcon DATASWITCH.
* The Develcon sends a string of the form "B{speed}\n" at a predefined
* baud rate. This string indicates the user's actual speed.
* The routine below returns the terminal type mapped from derived speed.
*/
struct portselect {
char *ps_baud;
char *ps_type;
} portspeeds[] = {
{ "B110", "std.110" },
{ "B134", "std.134" },
{ "B150", "std.150" },
{ "B300", "std.300" },
{ "B600", "std.600" },
{ "B1200", "std.1200" },
{ "B2400", "std.2400" },
{ "B4800", "std.4800" },
{ "B9600", "std.9600" },
{ "B19200", "std.19200" },
{ 0 }
};
char *
portselector()
{
char c, baud[20], *type = "default";
register struct portselect *ps;
int len;
alarm(5*60);
for (len = 0; len < sizeof (baud) - 1; len++) {
if (read(0, &c, 1) <= 0)
break;
c &= 0177;
if (c == '\n' || c == '\r')
break;
if (c == 'B')
len = 0; /* in case of leading garbage */
baud[len] = c;
}
baud[len] = '\0';
for (ps = portspeeds; ps->ps_baud; ps++)
if (strcmp(ps->ps_baud, baud) == 0) {
type = ps->ps_type;
break;
}
sleep(2); /* wait for connection to complete */
return (type);
}
/*
* This auto-baud speed select mechanism is written for the Micom 600
* portselector. Selection is done by looking at how the character '\r'
* is garbled at the different speeds.
*/
#include <sys/time.h>
char *
autobaud()
{
int rfds;
struct timeval timeout;
char c, *type = "9600-baud";
int null = 0;
ioctl(0, TIOCFLUSH, &null);
rfds = 1 << 0;
timeout.tv_sec = 5;
timeout.tv_usec = 0;
if (select(32, &rfds, (int *)0, (int *)0, &timeout) <= 0)
return (type);
if (read(0, &c, sizeof(char)) != sizeof(char))
return (type);
timeout.tv_sec = 0;
timeout.tv_usec = 20;
(void) select(32, (int *)0, (int *)0, (int *)0, &timeout);
ioctl(0, TIOCFLUSH, &null);
switch (c & 0377) {
case 0200: /* 300-baud */
type = "300-baud";
break;
case 0346: /* 1200-baud */
type = "1200-baud";
break;
case 015: /* 2400-baud */
case 0215:
type = "2400-baud";
break;
default: /* 4800-baud */
type = "4800-baud";
break;
case 0377: /* 9600-baud */
type = "9600-baud";
break;
}
return (type);
}