4.4BSD/usr/src/contrib/connectd/tip/tip.c
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint
#ifndef lint
static char sccsid[] = "@(#)tip.c 5.4 (Berkeley) 4/3/86";
#endif not lint
/*
* tip - UNIX link to other systems
* tip [-v] system-name [-option ....]
* or
* tip [-v] phone-number [-option ....]
* or
* tip [-v] [-option ....]
*/
#include "tip.h"
int disc = OTTYDISC; /* tip normally runs this way */
int intprompt();
int timeout();
int cleanup();
char *sname();
struct phonenumberent pent;
char PNbuf[256]; /* This limits the size of a number */
extern char *sprintf();
int dataset;
char optionbuf[1024] ;
struct connectdomain cd;
main(argc, argv)
char *argv[];
{
char *system = NOSTR;
register int i;
register char *p;
char sbuf[12];
register char *optp ;
if (argc > 4) {
fprintf(stderr,
"usage: tip [-v] [system or number] [-options ...]\n");
exit(1);
}
if (!isatty(0)) {
fprintf(stderr, "tip: must be interactive\n");
exit(1);
}
optp = optionbuf ;
for (; argc > 1; argv++, argc--) {
if (argv[1][0] != '-')
system = argv[1];
else switch (argv[1][1]) {
case 'v':
vflag++;
break;
default:
strcpy (optp, &argv[1][1]) ;
optp += strlen (&argv[1][1]) + 1 ;
break;
}
}
#ifdef notdef
/*if (system == NOSTR)
goto notnumber;
if (isalpha(*system))
goto notnumber;*/
if () {
fprintf(stderr, "tip: can't find phone number for %s\n",
system) ;
exit(1);
}
strncpy( PNbuf, system, sizeof PNbuf - 1 );
/*
* System name is really a phone number...
* Copy the number then stomp on the original (in case the number
* is private, we don't want 'ps' or 'w' to find it).
*/
if (strlen(system) > sizeof PNbuf - 1) {
fprintf(stderr, "tip: phone number too long (max = %d bytes)\n",
sizeof PNbuf - 1);
exit(1);
}
strncpy( PNbuf, system, sizeof PNbuf - 1 );
for (p = system; *p; p++)
*p = '\0';
PN = PNbuf;
system = sprintf(sbuf, "tip%d", BR);
notnumber:
#endif
strcpy (cd.cd_address, system);
cd.cd_alen = strlen (cd.cd_address) +1 ;
signal(SIGINT, cleanup);
signal(SIGQUIT, cleanup);
signal(SIGHUP, cleanup);
signal(SIGTERM, cleanup);
setbuf(stdout, NULL);
vinit(); /* init variables */
setparity("even"); /* set the parity table */
if ((FD = externalconnect (&cd, optionbuf, optp - optionbuf, 2)) <= 0){
printf("\07%s\n[EOT]\n", p);
exit(1);
}
dataset = 1;
ioctl(0, TIOCGETP, (char *)&defarg);
ioctl(0, TIOCGETC, (char *)&defchars);
ioctl(0, TIOCGLTC, (char *)&deflchars);
ioctl(0, TIOCGETD, (char *)&odisc);
arg = defarg;
arg.sg_flags = ANYP | CBREAK;
tchars = defchars;
tchars.t_intrc = tchars.t_quitc = -1;
ltchars = deflchars;
ltchars.t_suspc = ltchars.t_dsuspc = ltchars.t_flushc
= ltchars.t_lnextc = -1;
raw();
pipe(fildes); pipe(repdes);
signal(SIGALRM, timeout);
/*
* Everything's set up now:
* connection established (hardwired or dialup)
* line conditioned (baud rate, mode, etc.)
* internal data structures (variables)
* so, fork one process for local side and one for remote.
*/
printf(cumode ? "Connected\r\n" : "\07connected\r\n");
if (pid = fork())
tipin();
else
tipout();
/*NOTREACHED*/
}
cleanup()
{
if (odisc)
ioctl(0, TIOCSETD, (char *)&odisc);
unraw() ;
externalfinish (FD) ;
exit(0);
}
/*
* put the controlling keyboard into raw mode
*/
raw()
{
ioctl(0, TIOCSETP, &arg);
ioctl(0, TIOCSETC, &tchars);
ioctl(0, TIOCSLTC, <chars);
ioctl(0, TIOCSETD, (char *)&disc);
}
/*
* return keyboard to normal mode
*/
unraw()
{
if(!dataset) return; /* premature death blasts unset tty state */
ioctl(0, TIOCSETD, (char *)&odisc);
ioctl(0, TIOCSETP, (char *)&defarg);
ioctl(0, TIOCSETC, (char *)&defchars);
ioctl(0, TIOCSLTC, (char *)&deflchars);
}
static jmp_buf promptbuf;
/*
* Print string ``s'', then read a string
* in from the terminal. Handles signals & allows use of
* normal erase and kill characters.
*/
prompt(s, p)
char *s;
register char *p;
{
register char *b = p;
int (*oint)(), (*oquit)();
stoprompt = 0;
oint = signal(SIGINT, intprompt);
oint = signal(SIGQUIT, SIG_IGN);
unraw();
printf("%s", s);
if (setjmp(promptbuf) == 0)
while ((*p = getchar()) != EOF && *p != '\n')
p++;
*p = '\0';
raw();
signal(SIGINT, oint);
signal(SIGQUIT, oint);
return (stoprompt || p == b);
}
/*
* Interrupt service routine during prompting
*/
intprompt()
{
signal(SIGINT, SIG_IGN);
stoprompt = 1;
printf("\r\n");
longjmp(promptbuf, 1);
}
/*
* ****TIPIN TIPIN****
*/
tipin()
{
char gch, bol = 1;
/*
* Kinda klugey here...
* check for scripting being turned on from the .tiprc file,
* but be careful about just using setscript(), as we may
* send a SIGEMT before tipout has a chance to set up catching
* it; so wait a second, then setscript()
*/
if (boolean(value(SCRIPT))) {
sleep(1);
setscript();
}
while (1) {
gch = getchar()&0177;
if ((gch == character(value(ESCAPE))) && bol) {
if (!(gch = escape()))
continue;
} else if (!cumode && gch == character(value(RAISECHAR))) {
boolean(value(RAISE)) = !boolean(value(RAISE));
continue;
} else if (gch == '\r') {
bol = 1;
pwrite(FD, &gch, 1);
if (boolean(value(HALFDUPLEX)))
printf("\r\n");
continue;
} else if (!cumode && gch == character(value(FORCE)))
gch = getchar()&0177;
bol = any(gch, value(EOL));
if (boolean(value(RAISE)) && islower(gch))
gch = toupper(gch);
pwrite(FD, &gch, 1);
if (boolean(value(HALFDUPLEX)))
printf("%c", gch);
}
}
/*
* Escape handler --
* called on recognition of ``escapec'' at the beginning of a line
*/
escape()
{
register char gch;
register esctable_t *p;
char c = character(value(ESCAPE));
extern esctable_t etable[];
gch = (getchar()&0177);
for (p = etable; p->e_char; p++)
if (p->e_char == gch) {
if ((p->e_flags&PRIV) && getuid())
continue;
printf("%s", ctrl(c));
(*p->e_func)(gch);
return (0);
}
/* ESCAPE ESCAPE forces ESCAPE */
if (c != gch)
pwrite(FD, &c, 1);
return (gch);
}
any(c, p)
register char c, *p;
{
while (p && *p)
if (*p++ == c)
return (1);
return (0);
}
size(s)
register char *s;
{
register int i = 0;
while (s && *s++)
i++;
return (i);
}
char *
interp(s)
register char *s;
{
static char buf[256];
register char *p = buf, c, *q;
while (c = *s++) {
for (q = "\nn\rr\tt\ff\033E\bb"; *q; q++)
if (*q++ == c) {
*p++ = '\\'; *p++ = *q;
goto next;
}
if (c < 040) {
*p++ = '^'; *p++ = c + 'A'-1;
} else if (c == 0177) {
*p++ = '^'; *p++ = '?';
} else
*p++ = c;
next:
;
}
*p = '\0';
return (buf);
}
char *
ctrl(c)
char c;
{
static char s[3];
if (c < 040 || c == 0177) {
s[0] = '^';
s[1] = c == 0177 ? '?' : c+'A'-1;
s[2] = '\0';
} else {
s[0] = c;
s[1] = '\0';
}
return (s);
}
/*
* Help command
*/
help(c)
char c;
{
register esctable_t *p;
extern esctable_t etable[];
printf("%c\r\n", c);
for (p = etable; p->e_char; p++) {
if ((p->e_flags&PRIV) && getuid())
continue;
printf("%2s", ctrl(character(value(ESCAPE))));
printf("%-2s %c %s\r\n", ctrl(p->e_char),
p->e_flags&EXP ? '*': ' ', p->e_help);
}
}
/*
* Return "simple" name from a file name,
* strip leading directories.
*/
char *
sname(s)
register char *s;
{
register char *p = s;
while (*s)
if (*s++ == '/')
p = s;
return (p);
}
static char partab[0200];
/*
* Do a write to the remote machine with the correct parity.
* We are doing 8 bit wide output, so we just generate a character
* with the right parity and output it.
*/
pwrite(fd, buf, n)
int fd;
char *buf;
register int n;
{
register int i;
register char *bp;
extern int errno;
bp = buf;
for (i = 0; i < n; i++) {
*bp = partab[(*bp) & 0177];
bp++;
}
if (write(fd, buf, n) < 0) {
if (errno == EIO)
abort("Lost carrier.");
/* this is questionable */
perror("write");
}
}
/*
* Build a parity table with appropriate high-order bit.
*/
setparity(defparity)
char *defparity;
{
register int i;
char *parity;
extern char evenpartab[];
if (value(PARITY) == NOSTR)
value(PARITY) = defparity;
parity = value(PARITY);
for (i = 0; i < 0200; i++)
partab[i] = evenpartab[i];
if (equal(parity, "even"))
return;
if (equal(parity, "odd")) {
for (i = 0; i < 0200; i++)
partab[i] ^= 0200; /* reverse bit 7 */
return;
}
if (equal(parity, "none") || equal(parity, "zero")) {
for (i = 0; i < 0200; i++)
partab[i] &= ~0200; /* turn off bit 7 */
return;
}
if (equal(parity, "one")) {
for (i = 0; i < 0200; i++)
partab[i] |= 0200; /* turn on bit 7 */
return;
}
fprintf(stderr, "%s: unknown parity value\n", PA);
fflush(stderr);
}