Commit | Line | Data |
---|---|---|
051b1e55 | 1 | /* |
c9686c12 KB |
2 | * Copyright (c) 1983 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
051b1e55 DF |
16 | */ |
17 | ||
18 | #ifndef lint | |
19 | char copyright[] = | |
c9686c12 | 20 | "@(#) Copyright (c) 1983 The Regents of the University of California.\n\ |
051b1e55 | 21 | All rights reserved.\n"; |
c9686c12 | 22 | #endif /* not lint */ |
051b1e55 | 23 | |
05862919 | 24 | #ifndef lint |
c9686c12 KB |
25 | static char sccsid[] = "@(#)tip.c 5.8 (Berkeley) %G%"; |
26 | #endif /* not lint */ | |
3f48242d | 27 | |
5f50159a | 28 | /* |
3f48242d | 29 | * tip - UNIX link to other systems |
5f50159a | 30 | * tip [-v] [-speed] system-name |
3f48242d SL |
31 | * or |
32 | * cu phone-number [-s speed] [-l line] [-a acu] | |
5f50159a | 33 | */ |
5f50159a BJ |
34 | #include "tip.h" |
35 | ||
36 | /* | |
37 | * Baud rate mapping table | |
38 | */ | |
39 | int bauds[] = { | |
40 | 0, 50, 75, 110, 134, 150, 200, 300, 600, | |
41 | 1200, 1800, 2400, 4800, 9600, 19200, -1 | |
42 | }; | |
43 | ||
4b675d70 | 44 | int disc = OTTYDISC; /* tip normally runs this way */ |
5f50159a BJ |
45 | int intprompt(); |
46 | int timeout(); | |
3f48242d | 47 | int cleanup(); |
c731dacc | 48 | char *sname(); |
f1da3c6d | 49 | char PNbuf[256]; /* This limits the size of a number */ |
5f50159a BJ |
50 | |
51 | main(argc, argv) | |
d8feebc2 | 52 | char *argv[]; |
5f50159a BJ |
53 | { |
54 | char *system = NOSTR; | |
55 | register int i; | |
c731dacc BS |
56 | register char *p; |
57 | char sbuf[12]; | |
5f50159a | 58 | |
45d9e9af MK |
59 | gid = getgid(); |
60 | egid = getegid(); | |
61 | uid = getuid(); | |
62 | euid = geteuid(); | |
c731dacc | 63 | if (equal(sname(argv[0]), "cu")) { |
3f48242d | 64 | cumode = 1; |
f95c3446 | 65 | cumain(argc, argv); |
3f48242d SL |
66 | goto cucommon; |
67 | } | |
68 | ||
5f50159a BJ |
69 | if (argc > 4) { |
70 | fprintf(stderr, "usage: tip [-v] [-speed] [system-name]\n"); | |
71 | exit(1); | |
72 | } | |
73 | if (!isatty(0)) { | |
74 | fprintf(stderr, "tip: must be interactive\n"); | |
75 | exit(1); | |
76 | } | |
c731dacc BS |
77 | |
78 | for (; argc > 1; argv++, argc--) { | |
79 | if (argv[1][0] != '-') | |
80 | system = argv[1]; | |
81 | else switch (argv[1][1]) { | |
82 | ||
83 | case 'v': | |
84 | vflag++; | |
85 | break; | |
86 | ||
87 | case '0': case '1': case '2': case '3': case '4': | |
88 | case '5': case '6': case '7': case '8': case '9': | |
89 | BR = atoi(&argv[1][1]); | |
90 | break; | |
91 | ||
92 | default: | |
93 | fprintf(stderr, "tip: %s, unknown option\n", argv[1]); | |
94 | break; | |
95 | } | |
96 | } | |
97 | ||
d080fb0b BS |
98 | if (system == NOSTR) |
99 | goto notnumber; | |
7eabb9c8 DS |
100 | if (isalpha(*system)) |
101 | goto notnumber; | |
f1da3c6d DS |
102 | /* |
103 | * System name is really a phone number... | |
104 | * Copy the number then stomp on the original (in case the number | |
105 | * is private, we don't want 'ps' or 'w' to find it). | |
106 | */ | |
107 | if (strlen(system) > sizeof PNbuf - 1) { | |
108 | fprintf(stderr, "tip: phone number too long (max = %d bytes)\n", | |
109 | sizeof PNbuf - 1); | |
110 | exit(1); | |
111 | } | |
112 | strncpy( PNbuf, system, sizeof PNbuf - 1 ); | |
113 | for (p = system; *p; p++) | |
114 | *p = '\0'; | |
115 | PN = PNbuf; | |
9a491ec2 KB |
116 | (void)sprintf(sbuf, "tip%d", BR); |
117 | system = sbuf; | |
c731dacc BS |
118 | |
119 | notnumber: | |
5f50159a BJ |
120 | signal(SIGINT, cleanup); |
121 | signal(SIGQUIT, cleanup); | |
122 | signal(SIGHUP, cleanup); | |
123 | signal(SIGTERM, cleanup); | |
f0211bf2 | 124 | |
5f50159a BJ |
125 | if ((i = hunt(system)) == 0) { |
126 | printf("all ports busy\n"); | |
127 | exit(3); | |
128 | } | |
129 | if (i == -1) { | |
130 | printf("link down\n"); | |
5d369851 | 131 | (void)uu_unlock(uucplock); |
5f50159a BJ |
132 | exit(3); |
133 | } | |
eaa86232 | 134 | setbuf(stdout, NULL); |
5f50159a | 135 | loginit(); |
c731dacc | 136 | |
5f50159a BJ |
137 | /* |
138 | * Kludge, their's no easy way to get the initialization | |
139 | * in the right order, so force it here | |
140 | */ | |
141 | if ((PH = getenv("PHONES")) == NOSTR) | |
142 | PH = "/etc/phones"; | |
143 | vinit(); /* init variables */ | |
dfec50f2 | 144 | setparity("even"); /* set the parity table */ |
4b675d70 | 145 | if ((i = speed(number(value(BAUDRATE)))) == NULL) { |
5f50159a | 146 | printf("tip: bad baud rate %d\n", number(value(BAUDRATE))); |
5d369851 | 147 | (void)uu_unlock(uucplock); |
5f50159a BJ |
148 | exit(3); |
149 | } | |
f0211bf2 | 150 | |
f95c3446 MK |
151 | /* |
152 | * Now that we have the logfile and the ACU open | |
153 | * return to the real uid and gid. These things will | |
154 | * be closed on exit. Swap real and effective uid's | |
155 | * so we can get the original permissions back | |
156 | * for removing the uucp lock. | |
157 | */ | |
45d9e9af | 158 | user_uid(); |
f95c3446 | 159 | |
4b675d70 SL |
160 | /* |
161 | * Hardwired connections require the | |
162 | * line speed set before they make any transmissions | |
163 | * (this is particularly true of things like a DF03-AC) | |
164 | */ | |
165 | if (HW) | |
166 | ttysetup(i); | |
f0211bf2 SL |
167 | if (p = connect()) { |
168 | printf("\07%s\n[EOT]\n", p); | |
45d9e9af | 169 | daemon_uid(); |
5d369851 | 170 | (void)uu_unlock(uucplock); |
f0211bf2 SL |
171 | exit(1); |
172 | } | |
4b675d70 SL |
173 | if (!HW) |
174 | ttysetup(i); | |
3f48242d | 175 | cucommon: |
5f50159a | 176 | /* |
3f48242d SL |
177 | * From here down the code is shared with |
178 | * the "cu" version of tip. | |
5f50159a | 179 | */ |
f95c3446 | 180 | |
4b675d70 SL |
181 | ioctl(0, TIOCGETP, (char *)&defarg); |
182 | ioctl(0, TIOCGETC, (char *)&defchars); | |
c5d1037a | 183 | ioctl(0, TIOCGLTC, (char *)&deflchars); |
4b675d70 | 184 | ioctl(0, TIOCGETD, (char *)&odisc); |
5f50159a BJ |
185 | arg = defarg; |
186 | arg.sg_flags = ANYP | CBREAK; | |
187 | tchars = defchars; | |
188 | tchars.t_intrc = tchars.t_quitc = -1; | |
c5d1037a BJ |
189 | ltchars = deflchars; |
190 | ltchars.t_suspc = ltchars.t_dsuspc = ltchars.t_flushc | |
191 | = ltchars.t_lnextc = -1; | |
5f50159a | 192 | raw(); |
4b675d70 | 193 | |
5f50159a BJ |
194 | pipe(fildes); pipe(repdes); |
195 | signal(SIGALRM, timeout); | |
f0211bf2 SL |
196 | |
197 | /* | |
198 | * Everything's set up now: | |
20f8c5bf | 199 | * connection established (hardwired or dialup) |
f0211bf2 SL |
200 | * line conditioned (baud rate, mode, etc.) |
201 | * internal data structures (variables) | |
202 | * so, fork one process for local side and one for remote. | |
203 | */ | |
3f48242d | 204 | printf(cumode ? "Connected\r\n" : "\07connected\r\n"); |
5f50159a BJ |
205 | if (pid = fork()) |
206 | tipin(); | |
207 | else | |
208 | tipout(); | |
209 | /*NOTREACHED*/ | |
210 | } | |
211 | ||
5f50159a BJ |
212 | cleanup() |
213 | { | |
05862919 | 214 | |
45d9e9af | 215 | daemon_uid(); |
5d369851 | 216 | (void)uu_unlock(uucplock); |
f0211bf2 SL |
217 | if (odisc) |
218 | ioctl(0, TIOCSETD, (char *)&odisc); | |
5f50159a BJ |
219 | exit(0); |
220 | } | |
221 | ||
45d9e9af MK |
222 | /* |
223 | * Muck with user ID's. We are setuid to the owner of the lock | |
224 | * directory when we start. user_uid() reverses real and effective | |
225 | * ID's after startup, to run with the user's permissions. | |
226 | * daemon_uid() switches back to the privileged uid for unlocking. | |
227 | * Finally, to avoid running a shell with the wrong real uid, | |
228 | * shell_uid() sets real and effective uid's to the user's real ID. | |
229 | */ | |
230 | static int uidswapped; | |
231 | ||
232 | user_uid() | |
233 | { | |
234 | if (uidswapped == 0) { | |
235 | setregid(egid, gid); | |
236 | setreuid(euid, uid); | |
237 | uidswapped = 1; | |
238 | } | |
239 | } | |
240 | ||
241 | daemon_uid() | |
242 | { | |
243 | ||
244 | if (uidswapped) { | |
245 | setreuid(uid, euid); | |
246 | setregid(gid, egid); | |
247 | uidswapped = 0; | |
248 | } | |
249 | } | |
250 | ||
251 | shell_uid() | |
252 | { | |
253 | ||
254 | setreuid(uid, uid); | |
255 | setregid(gid, gid); | |
256 | } | |
257 | ||
5f50159a BJ |
258 | /* |
259 | * put the controlling keyboard into raw mode | |
260 | */ | |
261 | raw() | |
262 | { | |
05862919 | 263 | |
5f50159a BJ |
264 | ioctl(0, TIOCSETP, &arg); |
265 | ioctl(0, TIOCSETC, &tchars); | |
c5d1037a | 266 | ioctl(0, TIOCSLTC, <chars); |
4b675d70 | 267 | ioctl(0, TIOCSETD, (char *)&disc); |
5f50159a BJ |
268 | } |
269 | ||
270 | ||
271 | /* | |
272 | * return keyboard to normal mode | |
273 | */ | |
274 | unraw() | |
275 | { | |
05862919 | 276 | |
4b675d70 | 277 | ioctl(0, TIOCSETD, (char *)&odisc); |
4b675d70 SL |
278 | ioctl(0, TIOCSETP, (char *)&defarg); |
279 | ioctl(0, TIOCSETC, (char *)&defchars); | |
c5d1037a | 280 | ioctl(0, TIOCSLTC, (char *)&deflchars); |
5f50159a BJ |
281 | } |
282 | ||
05862919 SL |
283 | static jmp_buf promptbuf; |
284 | ||
5f50159a BJ |
285 | /* |
286 | * Print string ``s'', then read a string | |
287 | * in from the terminal. Handles signals & allows use of | |
288 | * normal erase and kill characters. | |
289 | */ | |
290 | prompt(s, p) | |
291 | char *s; | |
292 | register char *p; | |
293 | { | |
294 | register char *b = p; | |
05862919 | 295 | int (*oint)(), (*oquit)(); |
5f50159a BJ |
296 | |
297 | stoprompt = 0; | |
05862919 SL |
298 | oint = signal(SIGINT, intprompt); |
299 | oint = signal(SIGQUIT, SIG_IGN); | |
5f50159a BJ |
300 | unraw(); |
301 | printf("%s", s); | |
05862919 SL |
302 | if (setjmp(promptbuf) == 0) |
303 | while ((*p = getchar()) != EOF && *p != '\n') | |
304 | p++; | |
5f50159a | 305 | *p = '\0'; |
05862919 | 306 | |
5f50159a | 307 | raw(); |
05862919 SL |
308 | signal(SIGINT, oint); |
309 | signal(SIGQUIT, oint); | |
310 | return (stoprompt || p == b); | |
5f50159a BJ |
311 | } |
312 | ||
313 | /* | |
314 | * Interrupt service routine during prompting | |
315 | */ | |
316 | intprompt() | |
317 | { | |
05862919 | 318 | |
5f50159a BJ |
319 | signal(SIGINT, SIG_IGN); |
320 | stoprompt = 1; | |
321 | printf("\r\n"); | |
05862919 | 322 | longjmp(promptbuf, 1); |
5f50159a BJ |
323 | } |
324 | ||
325 | /* | |
326 | * ****TIPIN TIPIN**** | |
327 | */ | |
328 | tipin() | |
329 | { | |
330 | char gch, bol = 1; | |
331 | ||
388a70dc SL |
332 | /* |
333 | * Kinda klugey here... | |
334 | * check for scripting being turned on from the .tiprc file, | |
335 | * but be careful about just using setscript(), as we may | |
336 | * send a SIGEMT before tipout has a chance to set up catching | |
337 | * it; so wait a second, then setscript() | |
338 | */ | |
339 | if (boolean(value(SCRIPT))) { | |
340 | sleep(1); | |
341 | setscript(); | |
342 | } | |
343 | ||
5f50159a BJ |
344 | while (1) { |
345 | gch = getchar()&0177; | |
346 | if ((gch == character(value(ESCAPE))) && bol) { | |
347 | if (!(gch = escape())) | |
348 | continue; | |
3f48242d | 349 | } else if (!cumode && gch == character(value(RAISECHAR))) { |
5f50159a | 350 | boolean(value(RAISE)) = !boolean(value(RAISE)); |
5f50159a BJ |
351 | continue; |
352 | } else if (gch == '\r') { | |
353 | bol = 1; | |
6b46907f RC |
354 | pwrite(FD, &gch, 1); |
355 | if (boolean(value(HALFDUPLEX))) | |
356 | printf("\r\n"); | |
5f50159a | 357 | continue; |
3f48242d | 358 | } else if (!cumode && gch == character(value(FORCE))) |
5f50159a | 359 | gch = getchar()&0177; |
5f50159a BJ |
360 | bol = any(gch, value(EOL)); |
361 | if (boolean(value(RAISE)) && islower(gch)) | |
6b46907f RC |
362 | gch = toupper(gch); |
363 | pwrite(FD, &gch, 1); | |
364 | if (boolean(value(HALFDUPLEX))) | |
365 | printf("%c", gch); | |
5f50159a BJ |
366 | } |
367 | } | |
368 | ||
369 | /* | |
370 | * Escape handler -- | |
371 | * called on recognition of ``escapec'' at the beginning of a line | |
372 | */ | |
373 | escape() | |
374 | { | |
375 | register char gch; | |
376 | register esctable_t *p; | |
377 | char c = character(value(ESCAPE)); | |
378 | extern esctable_t etable[]; | |
379 | ||
380 | gch = (getchar()&0177); | |
381 | for (p = etable; p->e_char; p++) | |
382 | if (p->e_char == gch) { | |
45d9e9af | 383 | if ((p->e_flags&PRIV) && uid) |
5f50159a BJ |
384 | continue; |
385 | printf("%s", ctrl(c)); | |
386 | (*p->e_func)(gch); | |
05862919 | 387 | return (0); |
5f50159a | 388 | } |
62f62be8 SL |
389 | /* ESCAPE ESCAPE forces ESCAPE */ |
390 | if (c != gch) | |
6b46907f | 391 | pwrite(FD, &c, 1); |
05862919 | 392 | return (gch); |
5f50159a BJ |
393 | } |
394 | ||
395 | speed(n) | |
05862919 | 396 | int n; |
5f50159a BJ |
397 | { |
398 | register int *p; | |
399 | ||
400 | for (p = bauds; *p != -1; p++) | |
401 | if (*p == n) | |
05862919 SL |
402 | return (p - bauds); |
403 | return (NULL); | |
5f50159a BJ |
404 | } |
405 | ||
406 | any(c, p) | |
407 | register char c, *p; | |
408 | { | |
05862919 | 409 | while (p && *p) |
5f50159a | 410 | if (*p++ == c) |
05862919 SL |
411 | return (1); |
412 | return (0); | |
5f50159a BJ |
413 | } |
414 | ||
415 | size(s) | |
416 | register char *s; | |
417 | { | |
05862919 | 418 | register int i = 0; |
5f50159a | 419 | |
05862919 SL |
420 | while (s && *s++) |
421 | i++; | |
422 | return (i); | |
5f50159a BJ |
423 | } |
424 | ||
425 | char * | |
426 | interp(s) | |
427 | register char *s; | |
428 | { | |
429 | static char buf[256]; | |
430 | register char *p = buf, c, *q; | |
431 | ||
432 | while (c = *s++) { | |
433 | for (q = "\nn\rr\tt\ff\033E\bb"; *q; q++) | |
434 | if (*q++ == c) { | |
435 | *p++ = '\\'; *p++ = *q; | |
436 | goto next; | |
437 | } | |
438 | if (c < 040) { | |
439 | *p++ = '^'; *p++ = c + 'A'-1; | |
440 | } else if (c == 0177) { | |
441 | *p++ = '^'; *p++ = '?'; | |
442 | } else | |
443 | *p++ = c; | |
444 | next: | |
445 | ; | |
446 | } | |
447 | *p = '\0'; | |
05862919 | 448 | return (buf); |
5f50159a BJ |
449 | } |
450 | ||
451 | char * | |
452 | ctrl(c) | |
453 | char c; | |
454 | { | |
455 | static char s[3]; | |
456 | ||
457 | if (c < 040 || c == 0177) { | |
458 | s[0] = '^'; | |
459 | s[1] = c == 0177 ? '?' : c+'A'-1; | |
460 | s[2] = '\0'; | |
461 | } else { | |
462 | s[0] = c; | |
463 | s[1] = '\0'; | |
464 | } | |
05862919 | 465 | return (s); |
5f50159a BJ |
466 | } |
467 | ||
468 | /* | |
469 | * Help command | |
470 | */ | |
471 | help(c) | |
472 | char c; | |
473 | { | |
474 | register esctable_t *p; | |
475 | extern esctable_t etable[]; | |
476 | ||
477 | printf("%c\r\n", c); | |
478 | for (p = etable; p->e_char; p++) { | |
45d9e9af | 479 | if ((p->e_flags&PRIV) && uid) |
5f50159a BJ |
480 | continue; |
481 | printf("%2s", ctrl(character(value(ESCAPE)))); | |
482 | printf("%-2s %c %s\r\n", ctrl(p->e_char), | |
483 | p->e_flags&EXP ? '*': ' ', p->e_help); | |
484 | } | |
485 | } | |
4b675d70 SL |
486 | |
487 | /* | |
488 | * Set up the "remote" tty's state | |
489 | */ | |
4b675d70 | 490 | ttysetup(speed) |
05862919 | 491 | int speed; |
4b675d70 | 492 | { |
4b675d70 | 493 | unsigned bits = LDECCTQ; |
4b675d70 SL |
494 | |
495 | arg.sg_ispeed = arg.sg_ospeed = speed; | |
05862919 | 496 | arg.sg_flags = RAW; |
6b46907f | 497 | if (boolean(value(TAND))) |
05862919 | 498 | arg.sg_flags |= TANDEM; |
4b675d70 | 499 | ioctl(FD, TIOCSETP, (char *)&arg); |
4b675d70 | 500 | ioctl(FD, TIOCLBIS, (char *)&bits); |
4b675d70 | 501 | } |
c731dacc BS |
502 | |
503 | /* | |
504 | * Return "simple" name from a file name, | |
505 | * strip leading directories. | |
506 | */ | |
507 | char * | |
508 | sname(s) | |
509 | register char *s; | |
510 | { | |
511 | register char *p = s; | |
512 | ||
513 | while (*s) | |
514 | if (*s++ == '/') | |
515 | p = s; | |
516 | return (p); | |
517 | } | |
6b46907f | 518 | |
6b46907f RC |
519 | static char partab[0200]; |
520 | ||
521 | /* | |
05862919 SL |
522 | * Do a write to the remote machine with the correct parity. |
523 | * We are doing 8 bit wide output, so we just generate a character | |
6b46907f RC |
524 | * with the right parity and output it. |
525 | */ | |
526 | pwrite(fd, buf, n) | |
527 | int fd; | |
528 | char *buf; | |
529 | register int n; | |
530 | { | |
531 | register int i; | |
05862919 | 532 | register char *bp; |
e2326c44 | 533 | extern int errno; |
6b46907f | 534 | |
05862919 SL |
535 | bp = buf; |
536 | for (i = 0; i < n; i++) { | |
6b46907f | 537 | *bp = partab[(*bp) & 0177]; |
05862919 | 538 | bp++; |
6b46907f | 539 | } |
e2326c44 SL |
540 | if (write(fd, buf, n) < 0) { |
541 | if (errno == EIO) | |
542 | abort("Lost carrier."); | |
543 | /* this is questionable */ | |
544 | perror("write"); | |
545 | } | |
6b46907f RC |
546 | } |
547 | ||
548 | /* | |
05862919 | 549 | * Build a parity table with appropriate high-order bit. |
6b46907f | 550 | */ |
dfec50f2 SL |
551 | setparity(defparity) |
552 | char *defparity; | |
6b46907f | 553 | { |
05862919 | 554 | register int i; |
6b46907f | 555 | char *parity; |
05862919 | 556 | extern char evenpartab[]; |
6b46907f RC |
557 | |
558 | if (value(PARITY) == NOSTR) | |
dfec50f2 | 559 | value(PARITY) = defparity; |
6b46907f | 560 | parity = value(PARITY); |
6b46907f | 561 | for (i = 0; i < 0200; i++) |
05862919 SL |
562 | partab[i] = evenpartab[i]; |
563 | if (equal(parity, "even")) | |
564 | return; | |
6b46907f RC |
565 | if (equal(parity, "odd")) { |
566 | for (i = 0; i < 0200; i++) | |
567 | partab[i] ^= 0200; /* reverse bit 7 */ | |
05862919 | 568 | return; |
6b46907f | 569 | } |
05862919 | 570 | if (equal(parity, "none") || equal(parity, "zero")) { |
6b46907f RC |
571 | for (i = 0; i < 0200; i++) |
572 | partab[i] &= ~0200; /* turn off bit 7 */ | |
05862919 | 573 | return; |
6b46907f | 574 | } |
05862919 | 575 | if (equal(parity, "one")) { |
6b46907f RC |
576 | for (i = 0; i < 0200; i++) |
577 | partab[i] |= 0200; /* turn on bit 7 */ | |
05862919 | 578 | return; |
6b46907f | 579 | } |
05862919 SL |
580 | fprintf(stderr, "%s: unknown parity value\n", PA); |
581 | fflush(stderr); | |
6b46907f | 582 | } |