-/* tip.c 4.3 81/05/18 */
/*
- * tip - Unix link to other systems
- * tip [-v] [-speed] system-name
- *
- * Uses remote file for system descriptions.
- * Current commands (escapes):
- *
- * ~! fork a shell on the local machine
- * ~c change working directory on local machine
- * ~^D exit tip
- * ~< fetch file from remote system
- * ~> send file to remote system
- * ~t take a file from a remote UNIX (uses cat & echo)
- * ~p send a file to a remote UNIX (uses cat)
- * ~| fetch file from remote system and pipe it to
- * a local process
- * ~% fork and wait for a program which inherits file
- * descriptors 3 & 4 attached to the remote machine
- * (optional by CONNECT define)
- * ~s set or show variable
- * ~? give a help summary
- *
- * Samuel J. Leffler 1-18-81
- *
- * sjl 2-11-81
- * add auto-dial stuff for the BIZCOMP
- *
- * sjl 2-14-81
- * cleaned up auto-dialer stuff and added variables
- *
- * sjl 2-19-81
- * handle quit and interrupt during calls
- *
- * sjl 3-8-81
- * made to pass lint
+ * Copyright (c) 1983 The Regents of the University of California.
+ * All rights reserved.
*
- * sjl 4-11-81
- * mods to handle both FIOCAPACITY and FIONREAD in biz.c
- *
- * sjl 4-17-81
- * added take and put, made piping stuff work
- * honor uucp locks
- * rewrite remote file stuff for DN-11 like acu's and just to clean
- * it up
+ * 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
+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[] = "@(#)tip.c 5.13 (Berkeley) 6/1/90";
+#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
1200, 1800, 2400, 4800, 9600, 19200, -1
};
-int intprompt();
-int timeout();
-static int cleanup();
+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 *argv[];
{
char *system = NOSTR;
register int i;
-#ifdef VMUNIX
- int disc;
-#endif
- char *p;
+ 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");
fprintf(stderr, "tip: must be interactive\n");
exit(1);
}
- if (argc > 1 && argv[argc-1][0] != '-')
- system = argv[argc-1]; /* always last item */
- signal(SIGINT, cleanup);
- signal(SIGQUIT, cleanup);
- signal(SIGHUP, cleanup);
- signal(SIGTERM, cleanup);
+
+ 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. Note that we can't run as root,
- * because locking mechanism on the tty and the accounting
- * will be bypassed.
- */
- setuid(getuid());
- setgid(getgid());
- for (i = 1; i < argc-1; i++)
- if (equal(argv[i], "-v"))
- vflag++;
+
/*
* 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";
+ PH = _PATH_PHONES;
vinit(); /* init variables */
- for (i = 1; i < argc-1; i++)
- if (argv[i][0] == '-' && argv[i][1] != 'v') {
- if (isnum(argv[i][1]))
- number(value(BAUDRATE)) = atoi(&argv[i][1]);
- else
- printf("%s: unknown option\n", argv[i]);
- }
- if ((arg.sg_ispeed = speed(number(value(BAUDRATE)))) == NULL) {
+ setparity("even"); /* set the parity table */
+ if ((i = speed(number(value(BAUDRATE)))) == NULL) {
printf("tip: bad baud rate %d\n", number(value(BAUDRATE)));
- delock(uucplock);
+ (void)uu_unlock(uucplock);
exit(3);
}
- arg.sg_ospeed = arg.sg_ispeed;
+
/*
- * NOTE that remote side runs in TANDEM mode,
- * if the host doesn't honor X-ON/X-OFF with default
- * start/stop chars, the remote description must be
- * extended and tchars will have to be set up here.
- * If the host doesn't honor TANDEM mode, then watch
- * out, as you'll get garbage.
+ * 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.
*/
- arg.sg_flags = RAW | TANDEM;
- ioctl(FD, TIOCSETP, &arg);
-
- ioctl(0, TIOCGETP, &defarg); /* store initial status */
- ioctl(0, TIOCGETC, &defchars);
- arg = defarg;
- arg.sg_flags = ANYP | CBREAK;
- tchars = defchars;
- tchars.t_intrc = tchars.t_quitc = -1;
+ user_uid();
+ /*
+ * 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);
+ daemon_uid();
+ (void)uu_unlock(uucplock);
exit(1);
}
- write(1, "\07connected\n", 11);
- raw();
-#ifdef VMUNIX
+ 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);
- disc = OTTYDISC;
- ioctl(0, TIOCSETD, (char *)&disc);
-#endif
+ 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);
+ (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
/*NOTREACHED*/
}
-static
+void
cleanup()
{
- delock(uucplock);
+
+ 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) {
+ setregid(egid, gid);
+ setreuid(euid, uid);
+ uidswapped = 1;
+ }
+}
+
+daemon_uid()
+{
+
+ if (uidswapped) {
+ setreuid(uid, euid);
+ setregid(gid, egid);
+ uidswapped = 0;
+ }
+}
+
+shell_uid()
+{
+
+ setreuid(uid, uid);
+ setregid(gid, gid);
+}
+
/*
* 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);
}
*/
unraw()
{
- ioctl(0, TIOCSETP, &defarg);
- ioctl(0, TIOCSETC, &defchars);
+
+ 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
register char *p;
{
register char *b = p;
+ sig_t oint, oquit;
stoprompt = 0;
- signal(SIGINT, intprompt);
- signal(SIGQUIT, SIG_IGN);
+ oint = signal(SIGINT, intprompt);
+ oquit = signal(SIGQUIT, SIG_IGN);
unraw();
printf("%s", s);
- while ((*p = getchar()) != EOF && *p != '\n') {
- if (stoprompt)
- goto pbreak;
- p++;
- }
+ if (setjmp(promptbuf) == 0)
+ while ((*p = getchar()) != EOF && *p != '\n')
+ p++;
*p = '\0';
-pbreak:
+
raw();
- signal(SIGINT, SIG_DFL);
- signal(SIGQUIT,SIG_DFL);
- return(stoprompt || p == b);
+ (void)signal(SIGINT, oint);
+ (void)signal(SIGQUIT, oquit);
+ return (stoprompt || p == b);
}
/*
* Interrupt service routine during prompting
*/
+void
intprompt()
{
- signal(SIGINT, SIG_IGN);
+
+ (void)signal(SIGINT, SIG_IGN);
stoprompt = 1;
printf("\r\n");
+ longjmp(promptbuf, 1);
}
/*
if ((gch == character(value(ESCAPE))) && bol) {
if (!(gch = escape()))
continue;
- } else if (gch == character(value(RAISECHAR))) {
+ } else if (!cumode && gch == character(value(RAISECHAR))) {
boolean(value(RAISE)) = !boolean(value(RAISE));
- printf("%s", ctrl(character(value(RAISECHAR))));
continue;
} else if (gch == '\r') {
bol = 1;
- write(FD, &gch, 1);
+ pwrite(FD, &gch, 1);
+ if (boolean(value(HALFDUPLEX)))
+ printf("\r\n");
continue;
- } else if (gch == character(value(FORCE))) {
- printf("%s", ctrl(character(value(FORCE))));
+ } 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);
+ gch = toupper(gch);
+ pwrite(FD, &gch, 1);
+ if (boolean(value(HALFDUPLEX)))
+ printf("%c", gch);
}
}
gch = (getchar()&0177);
for (p = etable; p->e_char; p++)
if (p->e_char == gch) {
- if ((p->e_flags&PRIV) && getuid())
+ if ((p->e_flags&PRIV) && uid)
continue;
printf("%s", ctrl(c));
(*p->e_func)(gch);
- return(0);
+ return (0);
}
-
- write(FD, &c, 1);
- return(gch);
+ /* 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);
+ return (p - bauds);
+ return (NULL);
}
any(c, p)
register char c, *p;
{
- while (*p)
+ while (p && *p)
if (*p++ == c)
- return(1);
- return(0);
+ return (1);
+ return (0);
}
size(s)
register char *s;
{
- register int i = 0;
+ register int i = 0;
- while (*s++) i++;
- return(i);
+ while (s && *s++)
+ i++;
+ return (i);
}
char *
;
}
*p = '\0';
- return(buf);
+ return (buf);
}
char *
s[0] = c;
s[1] = '\0';
}
- return(s);
+ return (s);
}
/*
printf("%c\r\n", c);
for (p = etable; p->e_char; p++) {
- if ((p->e_flags&PRIV) && getuid())
+ 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)
+ 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);
+ if (equal(parity, "none")) {
+ bits8 = 1;
+ return;
+ } else
+ bits8 = 0;
+ 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, "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);
+}