Commit | Line | Data |
---|---|---|
051b1e55 DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | char copyright[] = | |
9 | "@(#) Copyright (c) 1983 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
05862919 | 13 | #ifndef lint |
45d9e9af | 14 | static char sccsid[] = "@(#)tip.c 5.5 (Berkeley) %G%"; |
051b1e55 | 15 | #endif not lint |
3f48242d | 16 | |
5f50159a | 17 | /* |
3f48242d | 18 | * tip - UNIX link to other systems |
5f50159a | 19 | * tip [-v] [-speed] system-name |
3f48242d SL |
20 | * or |
21 | * cu phone-number [-s speed] [-l line] [-a acu] | |
5f50159a | 22 | */ |
5f50159a BJ |
23 | #include "tip.h" |
24 | ||
25 | /* | |
26 | * Baud rate mapping table | |
27 | */ | |
28 | int bauds[] = { | |
29 | 0, 50, 75, 110, 134, 150, 200, 300, 600, | |
30 | 1200, 1800, 2400, 4800, 9600, 19200, -1 | |
31 | }; | |
32 | ||
4b675d70 | 33 | int disc = OTTYDISC; /* tip normally runs this way */ |
5f50159a BJ |
34 | int intprompt(); |
35 | int timeout(); | |
3f48242d | 36 | int cleanup(); |
c731dacc | 37 | char *sname(); |
f1da3c6d | 38 | char PNbuf[256]; /* This limits the size of a number */ |
c731dacc | 39 | extern char *sprintf(); |
5f50159a BJ |
40 | |
41 | main(argc, argv) | |
d8feebc2 | 42 | char *argv[]; |
5f50159a BJ |
43 | { |
44 | char *system = NOSTR; | |
45 | register int i; | |
c731dacc BS |
46 | register char *p; |
47 | char sbuf[12]; | |
5f50159a | 48 | |
45d9e9af MK |
49 | gid = getgid(); |
50 | egid = getegid(); | |
51 | uid = getuid(); | |
52 | euid = geteuid(); | |
c731dacc | 53 | if (equal(sname(argv[0]), "cu")) { |
3f48242d | 54 | cumode = 1; |
f95c3446 | 55 | cumain(argc, argv); |
3f48242d SL |
56 | goto cucommon; |
57 | } | |
58 | ||
5f50159a BJ |
59 | if (argc > 4) { |
60 | fprintf(stderr, "usage: tip [-v] [-speed] [system-name]\n"); | |
61 | exit(1); | |
62 | } | |
63 | if (!isatty(0)) { | |
64 | fprintf(stderr, "tip: must be interactive\n"); | |
65 | exit(1); | |
66 | } | |
c731dacc BS |
67 | |
68 | for (; argc > 1; argv++, argc--) { | |
69 | if (argv[1][0] != '-') | |
70 | system = argv[1]; | |
71 | else switch (argv[1][1]) { | |
72 | ||
73 | case 'v': | |
74 | vflag++; | |
75 | break; | |
76 | ||
77 | case '0': case '1': case '2': case '3': case '4': | |
78 | case '5': case '6': case '7': case '8': case '9': | |
79 | BR = atoi(&argv[1][1]); | |
80 | break; | |
81 | ||
82 | default: | |
83 | fprintf(stderr, "tip: %s, unknown option\n", argv[1]); | |
84 | break; | |
85 | } | |
86 | } | |
87 | ||
d080fb0b BS |
88 | if (system == NOSTR) |
89 | goto notnumber; | |
7eabb9c8 DS |
90 | if (isalpha(*system)) |
91 | goto notnumber; | |
f1da3c6d DS |
92 | /* |
93 | * System name is really a phone number... | |
94 | * Copy the number then stomp on the original (in case the number | |
95 | * is private, we don't want 'ps' or 'w' to find it). | |
96 | */ | |
97 | if (strlen(system) > sizeof PNbuf - 1) { | |
98 | fprintf(stderr, "tip: phone number too long (max = %d bytes)\n", | |
99 | sizeof PNbuf - 1); | |
100 | exit(1); | |
101 | } | |
102 | strncpy( PNbuf, system, sizeof PNbuf - 1 ); | |
103 | for (p = system; *p; p++) | |
104 | *p = '\0'; | |
105 | PN = PNbuf; | |
c731dacc BS |
106 | system = sprintf(sbuf, "tip%d", BR); |
107 | ||
108 | notnumber: | |
5f50159a BJ |
109 | signal(SIGINT, cleanup); |
110 | signal(SIGQUIT, cleanup); | |
111 | signal(SIGHUP, cleanup); | |
112 | signal(SIGTERM, cleanup); | |
f0211bf2 | 113 | |
5f50159a BJ |
114 | if ((i = hunt(system)) == 0) { |
115 | printf("all ports busy\n"); | |
116 | exit(3); | |
117 | } | |
118 | if (i == -1) { | |
119 | printf("link down\n"); | |
1603e05e | 120 | delock(uucplock); |
5f50159a BJ |
121 | exit(3); |
122 | } | |
eaa86232 | 123 | setbuf(stdout, NULL); |
5f50159a | 124 | loginit(); |
c731dacc | 125 | |
5f50159a BJ |
126 | /* |
127 | * Kludge, their's no easy way to get the initialization | |
128 | * in the right order, so force it here | |
129 | */ | |
130 | if ((PH = getenv("PHONES")) == NOSTR) | |
131 | PH = "/etc/phones"; | |
132 | vinit(); /* init variables */ | |
dfec50f2 | 133 | setparity("even"); /* set the parity table */ |
4b675d70 | 134 | if ((i = speed(number(value(BAUDRATE)))) == NULL) { |
5f50159a BJ |
135 | printf("tip: bad baud rate %d\n", number(value(BAUDRATE))); |
136 | delock(uucplock); | |
137 | exit(3); | |
138 | } | |
f0211bf2 | 139 | |
f95c3446 MK |
140 | /* |
141 | * Now that we have the logfile and the ACU open | |
142 | * return to the real uid and gid. These things will | |
143 | * be closed on exit. Swap real and effective uid's | |
144 | * so we can get the original permissions back | |
145 | * for removing the uucp lock. | |
146 | */ | |
45d9e9af | 147 | user_uid(); |
f95c3446 | 148 | |
4b675d70 SL |
149 | /* |
150 | * Hardwired connections require the | |
151 | * line speed set before they make any transmissions | |
152 | * (this is particularly true of things like a DF03-AC) | |
153 | */ | |
154 | if (HW) | |
155 | ttysetup(i); | |
f0211bf2 SL |
156 | if (p = connect()) { |
157 | printf("\07%s\n[EOT]\n", p); | |
45d9e9af | 158 | daemon_uid(); |
f0211bf2 SL |
159 | delock(uucplock); |
160 | exit(1); | |
161 | } | |
4b675d70 SL |
162 | if (!HW) |
163 | ttysetup(i); | |
3f48242d | 164 | cucommon: |
5f50159a | 165 | /* |
3f48242d SL |
166 | * From here down the code is shared with |
167 | * the "cu" version of tip. | |
5f50159a | 168 | */ |
f95c3446 | 169 | |
4b675d70 SL |
170 | ioctl(0, TIOCGETP, (char *)&defarg); |
171 | ioctl(0, TIOCGETC, (char *)&defchars); | |
c5d1037a | 172 | ioctl(0, TIOCGLTC, (char *)&deflchars); |
4b675d70 | 173 | ioctl(0, TIOCGETD, (char *)&odisc); |
5f50159a BJ |
174 | arg = defarg; |
175 | arg.sg_flags = ANYP | CBREAK; | |
176 | tchars = defchars; | |
177 | tchars.t_intrc = tchars.t_quitc = -1; | |
c5d1037a BJ |
178 | ltchars = deflchars; |
179 | ltchars.t_suspc = ltchars.t_dsuspc = ltchars.t_flushc | |
180 | = ltchars.t_lnextc = -1; | |
5f50159a | 181 | raw(); |
4b675d70 | 182 | |
5f50159a BJ |
183 | pipe(fildes); pipe(repdes); |
184 | signal(SIGALRM, timeout); | |
f0211bf2 SL |
185 | |
186 | /* | |
187 | * Everything's set up now: | |
20f8c5bf | 188 | * connection established (hardwired or dialup) |
f0211bf2 SL |
189 | * line conditioned (baud rate, mode, etc.) |
190 | * internal data structures (variables) | |
191 | * so, fork one process for local side and one for remote. | |
192 | */ | |
3f48242d | 193 | printf(cumode ? "Connected\r\n" : "\07connected\r\n"); |
5f50159a BJ |
194 | if (pid = fork()) |
195 | tipin(); | |
196 | else | |
197 | tipout(); | |
198 | /*NOTREACHED*/ | |
199 | } | |
200 | ||
5f50159a BJ |
201 | cleanup() |
202 | { | |
05862919 | 203 | |
45d9e9af | 204 | daemon_uid(); |
5f50159a | 205 | delock(uucplock); |
f0211bf2 SL |
206 | if (odisc) |
207 | ioctl(0, TIOCSETD, (char *)&odisc); | |
5f50159a BJ |
208 | exit(0); |
209 | } | |
210 | ||
45d9e9af MK |
211 | /* |
212 | * Muck with user ID's. We are setuid to the owner of the lock | |
213 | * directory when we start. user_uid() reverses real and effective | |
214 | * ID's after startup, to run with the user's permissions. | |
215 | * daemon_uid() switches back to the privileged uid for unlocking. | |
216 | * Finally, to avoid running a shell with the wrong real uid, | |
217 | * shell_uid() sets real and effective uid's to the user's real ID. | |
218 | */ | |
219 | static int uidswapped; | |
220 | ||
221 | user_uid() | |
222 | { | |
223 | if (uidswapped == 0) { | |
224 | setregid(egid, gid); | |
225 | setreuid(euid, uid); | |
226 | uidswapped = 1; | |
227 | } | |
228 | } | |
229 | ||
230 | daemon_uid() | |
231 | { | |
232 | ||
233 | if (uidswapped) { | |
234 | setreuid(uid, euid); | |
235 | setregid(gid, egid); | |
236 | uidswapped = 0; | |
237 | } | |
238 | } | |
239 | ||
240 | shell_uid() | |
241 | { | |
242 | ||
243 | setreuid(uid, uid); | |
244 | setregid(gid, gid); | |
245 | } | |
246 | ||
5f50159a BJ |
247 | /* |
248 | * put the controlling keyboard into raw mode | |
249 | */ | |
250 | raw() | |
251 | { | |
05862919 | 252 | |
5f50159a BJ |
253 | ioctl(0, TIOCSETP, &arg); |
254 | ioctl(0, TIOCSETC, &tchars); | |
c5d1037a | 255 | ioctl(0, TIOCSLTC, <chars); |
4b675d70 | 256 | ioctl(0, TIOCSETD, (char *)&disc); |
5f50159a BJ |
257 | } |
258 | ||
259 | ||
260 | /* | |
261 | * return keyboard to normal mode | |
262 | */ | |
263 | unraw() | |
264 | { | |
05862919 | 265 | |
4b675d70 | 266 | ioctl(0, TIOCSETD, (char *)&odisc); |
4b675d70 SL |
267 | ioctl(0, TIOCSETP, (char *)&defarg); |
268 | ioctl(0, TIOCSETC, (char *)&defchars); | |
c5d1037a | 269 | ioctl(0, TIOCSLTC, (char *)&deflchars); |
5f50159a BJ |
270 | } |
271 | ||
05862919 SL |
272 | static jmp_buf promptbuf; |
273 | ||
5f50159a BJ |
274 | /* |
275 | * Print string ``s'', then read a string | |
276 | * in from the terminal. Handles signals & allows use of | |
277 | * normal erase and kill characters. | |
278 | */ | |
279 | prompt(s, p) | |
280 | char *s; | |
281 | register char *p; | |
282 | { | |
283 | register char *b = p; | |
05862919 | 284 | int (*oint)(), (*oquit)(); |
5f50159a BJ |
285 | |
286 | stoprompt = 0; | |
05862919 SL |
287 | oint = signal(SIGINT, intprompt); |
288 | oint = signal(SIGQUIT, SIG_IGN); | |
5f50159a BJ |
289 | unraw(); |
290 | printf("%s", s); | |
05862919 SL |
291 | if (setjmp(promptbuf) == 0) |
292 | while ((*p = getchar()) != EOF && *p != '\n') | |
293 | p++; | |
5f50159a | 294 | *p = '\0'; |
05862919 | 295 | |
5f50159a | 296 | raw(); |
05862919 SL |
297 | signal(SIGINT, oint); |
298 | signal(SIGQUIT, oint); | |
299 | return (stoprompt || p == b); | |
5f50159a BJ |
300 | } |
301 | ||
302 | /* | |
303 | * Interrupt service routine during prompting | |
304 | */ | |
305 | intprompt() | |
306 | { | |
05862919 | 307 | |
5f50159a BJ |
308 | signal(SIGINT, SIG_IGN); |
309 | stoprompt = 1; | |
310 | printf("\r\n"); | |
05862919 | 311 | longjmp(promptbuf, 1); |
5f50159a BJ |
312 | } |
313 | ||
314 | /* | |
315 | * ****TIPIN TIPIN**** | |
316 | */ | |
317 | tipin() | |
318 | { | |
319 | char gch, bol = 1; | |
320 | ||
388a70dc SL |
321 | /* |
322 | * Kinda klugey here... | |
323 | * check for scripting being turned on from the .tiprc file, | |
324 | * but be careful about just using setscript(), as we may | |
325 | * send a SIGEMT before tipout has a chance to set up catching | |
326 | * it; so wait a second, then setscript() | |
327 | */ | |
328 | if (boolean(value(SCRIPT))) { | |
329 | sleep(1); | |
330 | setscript(); | |
331 | } | |
332 | ||
5f50159a BJ |
333 | while (1) { |
334 | gch = getchar()&0177; | |
335 | if ((gch == character(value(ESCAPE))) && bol) { | |
336 | if (!(gch = escape())) | |
337 | continue; | |
3f48242d | 338 | } else if (!cumode && gch == character(value(RAISECHAR))) { |
5f50159a | 339 | boolean(value(RAISE)) = !boolean(value(RAISE)); |
5f50159a BJ |
340 | continue; |
341 | } else if (gch == '\r') { | |
342 | bol = 1; | |
6b46907f RC |
343 | pwrite(FD, &gch, 1); |
344 | if (boolean(value(HALFDUPLEX))) | |
345 | printf("\r\n"); | |
5f50159a | 346 | continue; |
3f48242d | 347 | } else if (!cumode && gch == character(value(FORCE))) |
5f50159a | 348 | gch = getchar()&0177; |
5f50159a BJ |
349 | bol = any(gch, value(EOL)); |
350 | if (boolean(value(RAISE)) && islower(gch)) | |
6b46907f RC |
351 | gch = toupper(gch); |
352 | pwrite(FD, &gch, 1); | |
353 | if (boolean(value(HALFDUPLEX))) | |
354 | printf("%c", gch); | |
5f50159a BJ |
355 | } |
356 | } | |
357 | ||
358 | /* | |
359 | * Escape handler -- | |
360 | * called on recognition of ``escapec'' at the beginning of a line | |
361 | */ | |
362 | escape() | |
363 | { | |
364 | register char gch; | |
365 | register esctable_t *p; | |
366 | char c = character(value(ESCAPE)); | |
367 | extern esctable_t etable[]; | |
368 | ||
369 | gch = (getchar()&0177); | |
370 | for (p = etable; p->e_char; p++) | |
371 | if (p->e_char == gch) { | |
45d9e9af | 372 | if ((p->e_flags&PRIV) && uid) |
5f50159a BJ |
373 | continue; |
374 | printf("%s", ctrl(c)); | |
375 | (*p->e_func)(gch); | |
05862919 | 376 | return (0); |
5f50159a | 377 | } |
62f62be8 SL |
378 | /* ESCAPE ESCAPE forces ESCAPE */ |
379 | if (c != gch) | |
6b46907f | 380 | pwrite(FD, &c, 1); |
05862919 | 381 | return (gch); |
5f50159a BJ |
382 | } |
383 | ||
384 | speed(n) | |
05862919 | 385 | int n; |
5f50159a BJ |
386 | { |
387 | register int *p; | |
388 | ||
389 | for (p = bauds; *p != -1; p++) | |
390 | if (*p == n) | |
05862919 SL |
391 | return (p - bauds); |
392 | return (NULL); | |
5f50159a BJ |
393 | } |
394 | ||
395 | any(c, p) | |
396 | register char c, *p; | |
397 | { | |
05862919 | 398 | while (p && *p) |
5f50159a | 399 | if (*p++ == c) |
05862919 SL |
400 | return (1); |
401 | return (0); | |
5f50159a BJ |
402 | } |
403 | ||
404 | size(s) | |
405 | register char *s; | |
406 | { | |
05862919 | 407 | register int i = 0; |
5f50159a | 408 | |
05862919 SL |
409 | while (s && *s++) |
410 | i++; | |
411 | return (i); | |
5f50159a BJ |
412 | } |
413 | ||
414 | char * | |
415 | interp(s) | |
416 | register char *s; | |
417 | { | |
418 | static char buf[256]; | |
419 | register char *p = buf, c, *q; | |
420 | ||
421 | while (c = *s++) { | |
422 | for (q = "\nn\rr\tt\ff\033E\bb"; *q; q++) | |
423 | if (*q++ == c) { | |
424 | *p++ = '\\'; *p++ = *q; | |
425 | goto next; | |
426 | } | |
427 | if (c < 040) { | |
428 | *p++ = '^'; *p++ = c + 'A'-1; | |
429 | } else if (c == 0177) { | |
430 | *p++ = '^'; *p++ = '?'; | |
431 | } else | |
432 | *p++ = c; | |
433 | next: | |
434 | ; | |
435 | } | |
436 | *p = '\0'; | |
05862919 | 437 | return (buf); |
5f50159a BJ |
438 | } |
439 | ||
440 | char * | |
441 | ctrl(c) | |
442 | char c; | |
443 | { | |
444 | static char s[3]; | |
445 | ||
446 | if (c < 040 || c == 0177) { | |
447 | s[0] = '^'; | |
448 | s[1] = c == 0177 ? '?' : c+'A'-1; | |
449 | s[2] = '\0'; | |
450 | } else { | |
451 | s[0] = c; | |
452 | s[1] = '\0'; | |
453 | } | |
05862919 | 454 | return (s); |
5f50159a BJ |
455 | } |
456 | ||
457 | /* | |
458 | * Help command | |
459 | */ | |
460 | help(c) | |
461 | char c; | |
462 | { | |
463 | register esctable_t *p; | |
464 | extern esctable_t etable[]; | |
465 | ||
466 | printf("%c\r\n", c); | |
467 | for (p = etable; p->e_char; p++) { | |
45d9e9af | 468 | if ((p->e_flags&PRIV) && uid) |
5f50159a BJ |
469 | continue; |
470 | printf("%2s", ctrl(character(value(ESCAPE)))); | |
471 | printf("%-2s %c %s\r\n", ctrl(p->e_char), | |
472 | p->e_flags&EXP ? '*': ' ', p->e_help); | |
473 | } | |
474 | } | |
4b675d70 SL |
475 | |
476 | /* | |
477 | * Set up the "remote" tty's state | |
478 | */ | |
4b675d70 | 479 | ttysetup(speed) |
05862919 | 480 | int speed; |
4b675d70 | 481 | { |
4b675d70 | 482 | unsigned bits = LDECCTQ; |
4b675d70 SL |
483 | |
484 | arg.sg_ispeed = arg.sg_ospeed = speed; | |
05862919 | 485 | arg.sg_flags = RAW; |
6b46907f | 486 | if (boolean(value(TAND))) |
05862919 | 487 | arg.sg_flags |= TANDEM; |
4b675d70 | 488 | ioctl(FD, TIOCSETP, (char *)&arg); |
4b675d70 | 489 | ioctl(FD, TIOCLBIS, (char *)&bits); |
4b675d70 | 490 | } |
c731dacc BS |
491 | |
492 | /* | |
493 | * Return "simple" name from a file name, | |
494 | * strip leading directories. | |
495 | */ | |
496 | char * | |
497 | sname(s) | |
498 | register char *s; | |
499 | { | |
500 | register char *p = s; | |
501 | ||
502 | while (*s) | |
503 | if (*s++ == '/') | |
504 | p = s; | |
505 | return (p); | |
506 | } | |
6b46907f | 507 | |
6b46907f RC |
508 | static char partab[0200]; |
509 | ||
510 | /* | |
05862919 SL |
511 | * Do a write to the remote machine with the correct parity. |
512 | * We are doing 8 bit wide output, so we just generate a character | |
6b46907f RC |
513 | * with the right parity and output it. |
514 | */ | |
515 | pwrite(fd, buf, n) | |
516 | int fd; | |
517 | char *buf; | |
518 | register int n; | |
519 | { | |
520 | register int i; | |
05862919 | 521 | register char *bp; |
e2326c44 | 522 | extern int errno; |
6b46907f | 523 | |
05862919 SL |
524 | bp = buf; |
525 | for (i = 0; i < n; i++) { | |
6b46907f | 526 | *bp = partab[(*bp) & 0177]; |
05862919 | 527 | bp++; |
6b46907f | 528 | } |
e2326c44 SL |
529 | if (write(fd, buf, n) < 0) { |
530 | if (errno == EIO) | |
531 | abort("Lost carrier."); | |
532 | /* this is questionable */ | |
533 | perror("write"); | |
534 | } | |
6b46907f RC |
535 | } |
536 | ||
537 | /* | |
05862919 | 538 | * Build a parity table with appropriate high-order bit. |
6b46907f | 539 | */ |
dfec50f2 SL |
540 | setparity(defparity) |
541 | char *defparity; | |
6b46907f | 542 | { |
05862919 | 543 | register int i; |
6b46907f | 544 | char *parity; |
05862919 | 545 | extern char evenpartab[]; |
6b46907f RC |
546 | |
547 | if (value(PARITY) == NOSTR) | |
dfec50f2 | 548 | value(PARITY) = defparity; |
6b46907f | 549 | parity = value(PARITY); |
6b46907f | 550 | for (i = 0; i < 0200; i++) |
05862919 SL |
551 | partab[i] = evenpartab[i]; |
552 | if (equal(parity, "even")) | |
553 | return; | |
6b46907f RC |
554 | if (equal(parity, "odd")) { |
555 | for (i = 0; i < 0200; i++) | |
556 | partab[i] ^= 0200; /* reverse bit 7 */ | |
05862919 | 557 | return; |
6b46907f | 558 | } |
05862919 | 559 | if (equal(parity, "none") || equal(parity, "zero")) { |
6b46907f RC |
560 | for (i = 0; i < 0200; i++) |
561 | partab[i] &= ~0200; /* turn off bit 7 */ | |
05862919 | 562 | return; |
6b46907f | 563 | } |
05862919 | 564 | if (equal(parity, "one")) { |
6b46907f RC |
565 | for (i = 0; i < 0200; i++) |
566 | partab[i] |= 0200; /* turn on bit 7 */ | |
05862919 | 567 | return; |
6b46907f | 568 | } |
05862919 SL |
569 | fprintf(stderr, "%s: unknown parity value\n", PA); |
570 | fflush(stderr); | |
6b46907f | 571 | } |