615 lines
13 KiB
C
615 lines
13 KiB
C
/*
|
|
* Copyright (c) 1983 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
|
|
char copyright[] =
|
|
"@(#) Copyright (c) 1983 The Regents of the University of California.\n\
|
|
All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
/*static char sccsid[] = "from: @(#)tip.c 5.15 (Berkeley) 2/4/91";*/
|
|
static char rcsid[] = "$Id: tip.c,v 1.5 1994/04/20 17:21:28 pk Exp $";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* tip - UNIX link to other systems
|
|
* tip [-v] [-speed] system-name
|
|
* or
|
|
* cu phone-number [-s speed] [-l line] [-a acu]
|
|
*/
|
|
#include "tip.h"
|
|
#include "pathnames.h"
|
|
|
|
/*
|
|
* Baud rate mapping table
|
|
*/
|
|
int bauds[] = {
|
|
0, 50, 75, 110, 134, 150, 200, 300, 600,
|
|
1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200, -1
|
|
};
|
|
|
|
int disc = OTTYDISC; /* tip normally runs this way */
|
|
void intprompt();
|
|
void timeout();
|
|
void cleanup();
|
|
char *sname();
|
|
char PNbuf[256]; /* This limits the size of a number */
|
|
|
|
main(argc, argv)
|
|
char *argv[];
|
|
{
|
|
char *system = NOSTR;
|
|
register int i;
|
|
register char *p;
|
|
char sbuf[12];
|
|
|
|
gid = getgid();
|
|
egid = getegid();
|
|
uid = getuid();
|
|
euid = geteuid();
|
|
if (equal(sname(argv[0]), "cu")) {
|
|
cumode = 1;
|
|
cumain(argc, argv);
|
|
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;
|
|
if (isalpha(*system))
|
|
goto notnumber;
|
|
/*
|
|
* 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;
|
|
(void)sprintf(sbuf, "tip%d", BR);
|
|
system = sbuf;
|
|
|
|
notnumber:
|
|
(void)signal(SIGINT, cleanup);
|
|
(void)signal(SIGQUIT, cleanup);
|
|
(void)signal(SIGHUP, cleanup);
|
|
(void)signal(SIGTERM, cleanup);
|
|
|
|
if ((i = hunt(system)) == 0) {
|
|
printf("all ports busy\n");
|
|
exit(3);
|
|
}
|
|
if (i == -1) {
|
|
printf("link down\n");
|
|
(void)uu_unlock(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. Swap real and effective uid's
|
|
* so we can get the original permissions back
|
|
* for removing the uucp lock.
|
|
*/
|
|
user_uid();
|
|
|
|
/*
|
|
* Kludge, their's no easy way to get the initialization
|
|
* in the right order, so force it here
|
|
*/
|
|
if ((PH = getenv("PHONES")) == NOSTR)
|
|
PH = _PATH_PHONES;
|
|
vinit(); /* init variables */
|
|
setparity("even"); /* set the parity table */
|
|
if ((i = speed(number(value(BAUDRATE)))) == NULL) {
|
|
printf("tip: bad baud rate %d\n", number(value(BAUDRATE)));
|
|
daemon_uid();
|
|
(void)uu_unlock(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);
|
|
daemon_uid();
|
|
(void)uu_unlock(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);
|
|
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);
|
|
(void)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*/
|
|
}
|
|
|
|
void
|
|
cleanup()
|
|
{
|
|
|
|
daemon_uid();
|
|
(void)uu_unlock(uucplock);
|
|
if (odisc)
|
|
ioctl(0, TIOCSETD, (char *)&odisc);
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* Muck with user ID's. We are setuid to the owner of the lock
|
|
* directory when we start. user_uid() reverses real and effective
|
|
* ID's after startup, to run with the user's permissions.
|
|
* daemon_uid() switches back to the privileged uid for unlocking.
|
|
* Finally, to avoid running a shell with the wrong real uid,
|
|
* shell_uid() sets real and effective uid's to the user's real ID.
|
|
*/
|
|
static int uidswapped;
|
|
|
|
user_uid()
|
|
{
|
|
if (uidswapped == 0) {
|
|
setegid(gid);
|
|
seteuid(uid);
|
|
uidswapped = 1;
|
|
}
|
|
}
|
|
|
|
daemon_uid()
|
|
{
|
|
|
|
if (uidswapped) {
|
|
seteuid(euid);
|
|
setegid(egid);
|
|
uidswapped = 0;
|
|
}
|
|
}
|
|
|
|
shell_uid()
|
|
{
|
|
|
|
setgid(gid);
|
|
setuid(uid);
|
|
}
|
|
|
|
/*
|
|
* 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()
|
|
{
|
|
|
|
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;
|
|
sig_t oint, oquit;
|
|
|
|
stoprompt = 0;
|
|
oint = signal(SIGINT, intprompt);
|
|
oquit = signal(SIGQUIT, SIG_IGN);
|
|
unraw();
|
|
printf("%s", s);
|
|
if (setjmp(promptbuf) == 0)
|
|
while ((*p = getchar()) != EOF && *p != '\n')
|
|
p++;
|
|
*p = '\0';
|
|
|
|
raw();
|
|
(void)signal(SIGINT, oint);
|
|
(void)signal(SIGQUIT, oquit);
|
|
return (stoprompt || p == b);
|
|
}
|
|
|
|
/*
|
|
* Interrupt service routine during prompting
|
|
*/
|
|
void
|
|
intprompt()
|
|
{
|
|
|
|
(void)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) && uid)
|
|
continue;
|
|
printf("%s", ctrl(c));
|
|
(*p->e_func)(gch);
|
|
return (0);
|
|
}
|
|
/* ESCAPE ESCAPE forces ESCAPE */
|
|
if (c != gch)
|
|
pwrite(FD, &c, 1);
|
|
return (gch);
|
|
}
|
|
|
|
speed(n)
|
|
int 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;
|
|
{
|
|
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) && uid)
|
|
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)
|
|
int speed;
|
|
{
|
|
unsigned bits = LDECCTQ;
|
|
|
|
arg.sg_ispeed = arg.sg_ospeed = speed;
|
|
arg.sg_flags = RAW;
|
|
if (boolean(value(TAND)))
|
|
arg.sg_flags |= TANDEM;
|
|
ioctl(FD, TIOCSETP, (char *)&arg);
|
|
ioctl(FD, TIOCLBIS, (char *)&bits);
|
|
}
|
|
|
|
/*
|
|
* 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];
|
|
static int bits8;
|
|
|
|
/*
|
|
* 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;
|
|
if (bits8 == 0) {
|
|
static char *mbp; static sz;
|
|
|
|
if (mbp == 0 || n > sz) {
|
|
if (mbp)
|
|
free(mbp);
|
|
mbp = (char *) malloc(n);
|
|
sz = n;
|
|
}
|
|
|
|
bp = mbp;
|
|
for (i = 0; i < n; i++)
|
|
*bp++ = partab[*buf++ & 0177];
|
|
bp = mbp;
|
|
}
|
|
if (write(fd, bp, n) < 0) {
|
|
if (errno == EIO)
|
|
tipabort("Lost carrier.");
|
|
/* this is questionable */
|
|
perror("write");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Build a parity table with appropriate high-order bit.
|
|
*/
|
|
setparity(defparity)
|
|
char *defparity;
|
|
{
|
|
register int i, flip, clr, set;
|
|
char *parity;
|
|
extern char evenpartab[];
|
|
|
|
if (value(PARITY) == NOSTR)
|
|
value(PARITY) = defparity;
|
|
parity = value(PARITY);
|
|
if (equal(parity, "none")) {
|
|
bits8 = 1;
|
|
return;
|
|
}
|
|
bits8 = 0;
|
|
flip = 0;
|
|
clr = 0377;
|
|
set = 0;
|
|
if (equal(parity, "odd"))
|
|
flip = 0200; /* reverse bit 7 */
|
|
else if (equal(parity, "zero"))
|
|
clr = 0177; /* turn off bit 7 */
|
|
else if (equal(parity, "one"))
|
|
set = 0200; /* turn on bit 7 */
|
|
else if (!equal(parity, "even")) {
|
|
(void) fprintf(stderr, "%s: unknown parity value\r\n", parity);
|
|
(void) fflush(stderr);
|
|
}
|
|
for (i = 0; i < 0200; i++)
|
|
partab[i] = evenpartab[i] ^ flip | set & clr;
|
|
}
|