4.1cBSD/usr/src/usr.bin/tip/tip.c
/* tip.c 4.12 82/07/29 */
/*
* tip - UNIX link to other systems
* tip [-v] [-speed] system-name
* or
* cu phone-number [-s speed] [-l line] [-a acu]
*/
#include "tip.h"
/*
* Baud rate mapping table
*/
int bauds[] = {
0, 50, 75, 110, 134, 150, 200, 300, 600,
1200, 1800, 2400, 4800, 9600, 19200, -1
};
#ifdef VMUNIX
int disc = OTTYDISC; /* tip normally runs this way */
#endif
int intprompt();
int timeout();
int cleanup();
char *sname();
extern char *sprintf();
main(argc, argv)
char *argv[];
{
char *system = NOSTR;
register int i;
register char *p;
char sbuf[12];
if (equal(sname(argv[0]), "cu")) {
cumain(argc, argv);
cumode = 1;
goto cucommon;
}
if (argc > 4) {
fprintf(stderr, "usage: tip [-v] [-speed] [system-name]\n");
exit(1);
}
if (!isatty(0)) {
fprintf(stderr, "tip: must be interactive\n");
exit(1);
}
for (; argc > 1; argv++, argc--) {
if (argv[1][0] != '-')
system = argv[1];
else switch (argv[1][1]) {
case 'v':
vflag++;
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
BR = atoi(&argv[1][1]);
break;
default:
fprintf(stderr, "tip: %s, unknown option\n", argv[1]);
break;
}
}
if (system == NOSTR)
goto notnumber;
for (p = system; *p; p++)
if (isalpha(*p))
goto notnumber;
PN = system; /* system name is really a phone number */
system = sprintf(sbuf, "tip%d", BR);
notnumber:
signal(SIGINT, cleanup);
signal(SIGQUIT, cleanup);
signal(SIGHUP, cleanup);
signal(SIGTERM, cleanup);
if ((i = hunt(system)) == 0) {
printf("all ports busy\n");
exit(3);
}
if (i == -1) {
printf("link down\n");
delock(uucplock);
exit(3);
}
setbuf(stdout, NULL);
loginit();
/*
* Now that we have the logfile and the ACU open
* return to the real uid and gid. These things will
* be closed on exit. Note that we can't run as root,
* because locking mechanism on the tty and the accounting
* will be bypassed.
*/
setuid(getuid());
setgid(getgid());
/*
* Kludge, their's no easy way to get the initialization
* in the right order, so force it here
*/
if ((PH = getenv("PHONES")) == NOSTR)
PH = "/etc/phones";
vinit(); /* init variables */
if ((i = speed(number(value(BAUDRATE)))) == NULL) {
printf("tip: bad baud rate %d\n", number(value(BAUDRATE)));
delock(uucplock);
exit(3);
}
/*
* Hardwired connections require the
* line speed set before they make any transmissions
* (this is particularly true of things like a DF03-AC)
*/
if (HW)
ttysetup(i);
if (p = connect()) {
printf("\07%s\n[EOT]\n", p);
delock(uucplock);
exit(1);
}
if (!HW)
ttysetup(i);
cucommon:
/*
* From here down the code is shared with
* the "cu" version of tip.
*/
ioctl(0, TIOCGETP, (char *)&defarg);
ioctl(0, TIOCGETC, (char *)&defchars);
#ifdef VMUNIX
ioctl(0, TIOCGETD, (char *)&odisc);
#endif
arg = defarg;
arg.sg_flags = ANYP | CBREAK;
tchars = defchars;
tchars.t_intrc = tchars.t_quitc = -1;
raw();
pipe(fildes); pipe(repdes);
signal(SIGALRM, timeout);
/*
* Everything's set up now:
* connection established (hardwired or diaulup)
* 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()
{
delock(uucplock);
#ifdef VMUNIX
if (odisc)
ioctl(0, TIOCSETD, (char *)&odisc);
#endif
exit(0);
}
/*
* put the controlling keyboard into raw mode
*/
raw()
{
ioctl(0, TIOCSETP, &arg);
ioctl(0, TIOCSETC, &tchars);
#ifdef VMUNIX
ioctl(0, TIOCSETD, (char *)&disc);
#endif
}
/*
* return keyboard to normal mode
*/
unraw()
{
#ifdef VMUNIX
ioctl(0, TIOCSETD, (char *)&odisc);
#endif
ioctl(0, TIOCSETP, (char *)&defarg);
ioctl(0, TIOCSETC, (char *)&defchars);
}
/*
* 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;
stoprompt = 0;
signal(SIGINT, intprompt);
signal(SIGQUIT, SIG_IGN);
unraw();
printf("%s", s);
while ((*p = getchar()) != EOF && *p != '\n') {
if (stoprompt)
goto pbreak;
p++;
}
*p = '\0';
pbreak:
raw();
signal(SIGINT, SIG_DFL);
signal(SIGQUIT,SIG_DFL);
return(stoprompt || p == b);
}
/*
* Interrupt service routine during prompting
*/
intprompt()
{
signal(SIGINT, SIG_IGN);
stoprompt = 1;
printf("\r\n");
}
/*
* ****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;
write(FD, &gch, 1);
continue;
} else if (!cumode && gch == character(value(FORCE)))
gch = getchar()&0177;
bol = any(gch, value(EOL));
if (boolean(value(RAISE)) && islower(gch))
toupper(gch);
write(FD, &gch, 1);
}
}
/*
* 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)
write(FD, &c, 1);
return(gch);
}
speed(n)
{
register int *p;
for (p = bauds; *p != -1; p++)
if (*p == n)
return(p-bauds);
return(NULL);
}
any(c, p)
register char c, *p;
{
if (p)
while (*p)
if (*p++ == c)
return(1);
return(0);
}
size(s)
register char *s;
{
register int i = 0;
while (*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);
}
}
/*
* Set up the "remote" tty's state
*/
ttysetup(speed)
{
#ifdef VMUNIX
unsigned bits = LDECCTQ;
#endif
arg.sg_ispeed = arg.sg_ospeed = speed;
arg.sg_flags = TANDEM|RAW;
ioctl(FD, TIOCSETP, (char *)&arg);
#ifdef VMUNIX
ioctl(FD, TIOCLBIS, (char *)&bits);
#endif
}
/*
* 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);
}