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HardenedBSD/libexec/getty/subr.c

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/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)from: subr.c 8.1 (Berkeley) 6/4/93";
#endif
static const char rcsid[] =
"$Id$";
#endif /* not lint */
/*
* Melbourne getty.
*/
#define COMPAT_43
#ifdef DEBUG
#include <stdio.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/time.h>
#include <syslog.h>
#include "gettytab.h"
#include "pathnames.h"
#include "extern.h"
#ifdef COMPAT_43
static void compatflags __P((long));
#endif
/*
* Get a table entry.
*/
void
gettable(name, buf)
const char *name;
char *buf;
{
register struct gettystrs *sp;
register struct gettynums *np;
register struct gettyflags *fp;
long n;
int l;
char *p;
char *msg = NULL;
const char *dba[2];
static int firsttime = 1;
dba[0] = _PATH_GETTYTAB;
dba[1] = 0;
if (firsttime) {
/*
* we need to strdup() anything in the strings array
* initially in order to simplify things later
*/
for (sp = gettystrs; sp->field; sp++)
if (sp->value != NULL) {
/* handle these ones more carefully */
if (sp >= &gettystrs[4] && sp <= &gettystrs[6])
l = 2;
else
l = strlen(sp->value) + 1;
if ((p = malloc(l)) != NULL) {
strncpy(p, sp->value, l);
p[l-1] = '\0';
}
/*
* replace, even if NULL, else we'll
* have problems with free()ing static mem
*/
sp->value = p;
}
firsttime = 0;
}
switch (cgetent(&buf, (char **)dba, (char *)name)) {
case 1:
msg = "%s: couldn't resolve 'tc=' in gettytab '%s'";
case 0:
break;
case -1:
msg = "%s: unknown gettytab entry '%s'";
break;
case -2:
msg = "%s: retrieving gettytab entry '%s': %m";
break;
case -3:
msg = "%s: recursive 'tc=' reference gettytab entry '%s'";
break;
default:
msg = "%s: unexpected cgetent() error for entry '%s'";
break;
}
if (msg != NULL) {
syslog(LOG_ERR, msg, "getty", name);
return;
}
for (sp = gettystrs; sp->field; sp++) {
if ((l = cgetstr(buf, (char*)sp->field, &p)) >= 0) {
if (sp->value) {
/* prefer existing value */
if (strcmp(p, sp->value) != 0)
free(sp->value);
else {
free(p);
p = sp->value;
}
}
sp->value = p;
} else if (l == -1) {
free(sp->value);
sp->value = NULL;
}
}
for (np = gettynums; np->field; np++) {
if (cgetnum(buf, (char*)np->field, &n) == -1)
np->set = 0;
else {
np->set = 1;
np->value = n;
}
}
for (fp = gettyflags; fp->field; fp++) {
if (cgetcap(buf, (char *)fp->field, ':') == NULL)
fp->set = 0;
else {
fp->set = 1;
fp->value = 1 ^ fp->invrt;
}
}
#ifdef DEBUG
printf("name=\"%s\", buf=\"%s\"\r\n", name, buf);
for (sp = gettystrs; sp->field; sp++)
printf("cgetstr: %s=%s\r\n", sp->field, sp->value);
for (np = gettynums; np->field; np++)
printf("cgetnum: %s=%d\r\n", np->field, np->value);
for (fp = gettyflags; fp->field; fp++)
printf("cgetflags: %s='%c' set='%c'\r\n", fp->field,
fp->value + '0', fp->set + '0');
#endif /* DEBUG */
}
void
gendefaults()
{
register struct gettystrs *sp;
register struct gettynums *np;
register struct gettyflags *fp;
for (sp = gettystrs; sp->field; sp++)
if (sp->value)
sp->defalt = strdup(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;
}
void
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 ? sp->defalt
: strdup(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.c_cc[VERASE], &tmode.c_cc[VKILL], &tmode.c_cc[VINTR],
&tmode.c_cc[VQUIT], &tmode.c_cc[VSTART], &tmode.c_cc[VSTOP],
&tmode.c_cc[VEOF], &tmode.c_cc[VEOL], &tmode.c_cc[VSUSP],
&tmode.c_cc[VDSUSP], &tmode.c_cc[VREPRINT], &tmode.c_cc[VDISCARD],
&tmode.c_cc[VWERASE], &tmode.c_cc[VLNEXT], 0
};
void
setchars()
{
register int i;
register const char *p;
for (i = 0; charnames[i]; i++) {
p = *charnames[i];
if (p && *p)
*charvars[i] = *p;
else
*charvars[i] = _POSIX_VDISABLE;
}
}
/* Macros to clear/set/test flags. */
#define SET(t, f) (t) |= (f)
#define CLR(t, f) (t) &= ~(f)
#define ISSET(t, f) ((t) & (f))
void
setflags(n)
int n;
{
register tcflag_t iflag, oflag, cflag, lflag;
#ifdef COMPAT_43
switch (n) {
case 0:
if (F0set) {
compatflags(F0);
return;
}
break;
case 1:
if (F1set) {
compatflags(F1);
return;
}
break;
default:
if (F2set) {
compatflags(F2);
return;
}
break;
}
#endif
switch (n) {
case 0:
if (C0set && I0set && L0set && O0set) {
tmode.c_cflag = C0;
tmode.c_iflag = I0;
tmode.c_lflag = L0;
tmode.c_oflag = O0;
return;
}
break;
case 1:
if (C1set && I1set && L1set && O1set) {
tmode.c_cflag = C1;
tmode.c_iflag = I1;
tmode.c_lflag = L1;
tmode.c_oflag = O1;
return;
}
break;
default:
if (C2set && I2set && L2set && O2set) {
tmode.c_cflag = C2;
tmode.c_iflag = I2;
tmode.c_lflag = L2;
tmode.c_oflag = O2;
return;
}
break;
}
iflag = omode.c_iflag;
oflag = omode.c_oflag;
cflag = omode.c_cflag;
lflag = omode.c_lflag;
if (NP) {
CLR(cflag, CSIZE|PARENB);
SET(cflag, CS8);
CLR(iflag, ISTRIP|INPCK|IGNPAR);
} else if (AP || EP || OP) {
CLR(cflag, CSIZE);
SET(cflag, CS7|PARENB);
SET(iflag, ISTRIP);
if (OP && !EP) {
SET(iflag, INPCK|IGNPAR);
SET(cflag, PARODD);
if (AP)
CLR(iflag, INPCK);
} else if (EP && !OP) {
SET(iflag, INPCK|IGNPAR);
CLR(cflag, PARODD);
if (AP)
CLR(iflag, INPCK);
} else if (AP || (EP && OP)) {
CLR(iflag, INPCK|IGNPAR);
CLR(cflag, PARODD);
}
} /* else, leave as is */
#if 0
if (UC)
f |= LCASE;
#endif
if (HC)
SET(cflag, HUPCL);
else
CLR(cflag, HUPCL);
if (MB)
SET(cflag, MDMBUF);
else
CLR(cflag, MDMBUF);
if (HW)
SET(cflag, CRTSCTS);
else
CLR(cflag, CRTSCTS);
if (NL) {
SET(iflag, ICRNL);
SET(oflag, ONLCR|OPOST);
} else {
CLR(iflag, ICRNL);
CLR(oflag, ONLCR);
}
if (!HT)
SET(oflag, OXTABS|OPOST);
else
CLR(oflag, OXTABS);
#ifdef XXX_DELAY
SET(f, delaybits());
#endif
if (n == 1) { /* read mode flags */
if (RW) {
iflag = 0;
CLR(oflag, OPOST);
CLR(cflag, CSIZE|PARENB);
SET(cflag, CS8);
lflag = 0;
} else {
CLR(lflag, ICANON);
}
goto out;
}
if (n == 0)
goto out;
#if 0
if (CB)
SET(f, CRTBS);
#endif
if (CE)
SET(lflag, ECHOE);
else
CLR(lflag, ECHOE);
if (CK)
SET(lflag, ECHOKE);
else
CLR(lflag, ECHOKE);
if (PE)
SET(lflag, ECHOPRT);
else
CLR(lflag, ECHOPRT);
if (EC)
SET(lflag, ECHO);
else
CLR(lflag, ECHO);
if (XC)
SET(lflag, ECHOCTL);
else
CLR(lflag, ECHOCTL);
if (DX)
SET(lflag, IXANY);
else
CLR(lflag, IXANY);
out:
tmode.c_iflag = iflag;
tmode.c_oflag = oflag;
tmode.c_cflag = cflag;
tmode.c_lflag = lflag;
}
#ifdef COMPAT_43
/*
* Old TTY => termios, snatched from <sys/kern/tty_compat.c>
*/
void
compatflags(flags)
register long flags;
{
register tcflag_t iflag, oflag, cflag, lflag;
iflag = BRKINT|ICRNL|IMAXBEL|IXON|IXANY;
oflag = OPOST|ONLCR|OXTABS;
cflag = CREAD;
lflag = ICANON|ISIG|IEXTEN;
if (ISSET(flags, TANDEM))
SET(iflag, IXOFF);
else
CLR(iflag, IXOFF);
if (ISSET(flags, ECHO))
SET(lflag, ECHO);
else
CLR(lflag, ECHO);
if (ISSET(flags, CRMOD)) {
SET(iflag, ICRNL);
SET(oflag, ONLCR);
} else {
CLR(iflag, ICRNL);
CLR(oflag, ONLCR);
}
if (ISSET(flags, XTABS))
SET(oflag, OXTABS);
else
CLR(oflag, OXTABS);
if (ISSET(flags, RAW)) {
iflag &= IXOFF;
CLR(lflag, ISIG|ICANON|IEXTEN);
CLR(cflag, PARENB);
} else {
SET(iflag, BRKINT|IXON|IMAXBEL);
SET(lflag, ISIG|IEXTEN);
if (ISSET(flags, CBREAK))
CLR(lflag, ICANON);
else
SET(lflag, ICANON);
switch (ISSET(flags, ANYP)) {
case 0:
CLR(cflag, PARENB);
break;
case ANYP:
SET(cflag, PARENB);
CLR(iflag, INPCK);
break;
case EVENP:
SET(cflag, PARENB);
SET(iflag, INPCK);
CLR(cflag, PARODD);
break;
case ODDP:
SET(cflag, PARENB);
SET(iflag, INPCK);
SET(cflag, PARODD);
break;
}
}
/* Nothing we can do with CRTBS. */
if (ISSET(flags, PRTERA))
SET(lflag, ECHOPRT);
else
CLR(lflag, ECHOPRT);
if (ISSET(flags, CRTERA))
SET(lflag, ECHOE);
else
CLR(lflag, ECHOE);
/* Nothing we can do with TILDE. */
if (ISSET(flags, MDMBUF))
SET(cflag, MDMBUF);
else
CLR(cflag, MDMBUF);
if (ISSET(flags, NOHANG))
CLR(cflag, HUPCL);
else
SET(cflag, HUPCL);
if (ISSET(flags, CRTKIL))
SET(lflag, ECHOKE);
else
CLR(lflag, ECHOKE);
if (ISSET(flags, CTLECH))
SET(lflag, ECHOCTL);
else
CLR(lflag, ECHOCTL);
if (!ISSET(flags, DECCTQ))
SET(iflag, IXANY);
else
CLR(iflag, IXANY);
CLR(lflag, TOSTOP|FLUSHO|PENDIN|NOFLSH);
SET(lflag, ISSET(flags, TOSTOP|FLUSHO|PENDIN|NOFLSH));
if (ISSET(flags, RAW|LITOUT|PASS8)) {
CLR(cflag, CSIZE);
SET(cflag, CS8);
if (!ISSET(flags, RAW|PASS8))
SET(iflag, ISTRIP);
else
CLR(iflag, ISTRIP);
if (!ISSET(flags, RAW|LITOUT))
SET(oflag, OPOST);
else
CLR(oflag, OPOST);
} else {
CLR(cflag, CSIZE);
SET(cflag, CS7);
SET(iflag, ISTRIP);
SET(oflag, OPOST);
}
tmode.c_iflag = iflag;
tmode.c_oflag = oflag;
tmode.c_cflag = cflag;
tmode.c_lflag = lflag;
}
#endif
#ifdef XXX_DELAY
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 },
};
int
delaybits()
{
register int f;
f = adelay(CD, crdelay);
f |= adelay(ND, nldelay);
f |= adelay(FD, ffdelay);
f |= adelay(TD, tbdelay);
f |= adelay(BD, bsdelay);
return (f);
}
int
adelay(ms, dp)
register ms;
register struct delayval *dp;
{
if (ms == 0)
return (0);
while (dp->delay && ms > dp->delay)
dp++;
return (dp->bits);
}
#endif
char editedhost[MAXHOSTNAMELEN];
void
edithost(pat)
register const char *pat;
{
register const 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';
}
static 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 */
{ 57600, B57600 },
{ 115200, B115200 },
{ 0 }
};
int
speed(val)
int val;
{
register struct speedtab *sp;
if (val <= B115200)
return (val);
for (sp = speedtab; sp->speed; sp++)
if (sp->speed == val)
return (sp->uxname);
return (B300); /* default in impossible cases */
}
void
makeenv(env)
char *env[];
{
static char termbuf[128] = "TERM=";
register char *p, *q;
register char **ep;
ep = env;
if (TT && *TT) {
strcat(termbuf, TT);
*ep++ = termbuf;
}
if ((p = EV)) {
q = p;
while ((q = strchr(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 {
const char *ps_baud;
const 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 }
};
const char *
portselector()
{
char c, baud[20];
const char *type = "default";
register struct portselect *ps;
int len;
alarm(5*60);
for (len = 0; len < sizeof (baud) - 1; len++) {
if (read(STDIN_FILENO, &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.
*/
const char *
autobaud()
{
int rfds;
struct timeval timeout;
char c;
const char *type = "9600-baud";
(void)tcflush(0, TCIOFLUSH);
rfds = 1 << 0;
timeout.tv_sec = 5;
timeout.tv_usec = 0;
if (select(32, (fd_set *)&rfds, (fd_set *)NULL,
(fd_set *)NULL, &timeout) <= 0)
return (type);
if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char))
return (type);
timeout.tv_sec = 0;
timeout.tv_usec = 20;
(void) select(32, (fd_set *)NULL, (fd_set *)NULL,
(fd_set *)NULL, &timeout);
(void)tcflush(0, TCIOFLUSH);
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);
}
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