Commit | Line | Data |
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31cef89c BJ |
1 | # include <stdio.h> |
2 | # include <ctype.h> | |
3 | # include <signal.h> | |
4 | # include <sysexits.h> | |
5 | # include "useful.h" | |
6 | ||
4b9ccde7 C |
7 | static char SccsId[] = "@(#)arpa.c 2.2 1/11/81"; |
8 | char Version[] = "@(#)Arpa-mailer version 2.2 of 1/11/81"; | |
31cef89c BJ |
9 | |
10 | ||
11 | /* | |
12 | ** ARPA MAILER -- Queue ARPANET mail for eventual delivery | |
13 | ** | |
14 | ** The standard input is stuck away in the outgoing arpanet | |
15 | ** mail queue for delivery by the true arpanet mailer. | |
16 | ** | |
17 | ** Usage: | |
18 | ** /usr/lib/mailers/arpa from host user | |
19 | ** | |
20 | ** Positional Parameters: | |
21 | ** from -- the person sending the mail. | |
22 | ** host -- the host to send the mail to. | |
23 | ** user -- the user to send the mail to. | |
24 | ** | |
25 | ** Flags: | |
26 | ** -T -- debug flag. | |
27 | ** | |
28 | ** Files: | |
29 | ** /usr/spool/netmail/* -- the queue file. | |
30 | ** | |
31 | ** Return Codes: | |
32 | ** 0 -- all messages successfully mailed. | |
33 | ** 2 -- user or host unknown. | |
34 | ** 3 -- service unavailable, probably temporary | |
35 | ** file system condition. | |
36 | ** 4 -- syntax error in address. | |
37 | ** | |
38 | ** Compilation Flags: | |
39 | ** SPOOLDIR -- the spool directory | |
40 | ** | |
41 | ** Compilation Instructions: | |
42 | ** cc -n -O -s arpa-mailer.c -o arpa-mailer -lX | |
43 | ** chmod 755 arpa-mailer | |
44 | ** mv arpa-mailer /usr/lib/mailers/arpa | |
45 | ** | |
46 | ** Author: | |
47 | ** Eric Allman, UCB/INGRES (eric@berkeley) | |
48 | */ | |
49 | ||
50 | # define SPOOLDIR "/usr/spool/netmail" | |
51 | ||
52 | ||
53 | ||
54 | ||
55 | char *From; /* person sending this mail */ | |
56 | char *To; /* current "To:" person */ | |
57 | int State; /* the current state (for exit codes) */ | |
58 | # ifdef DEBUG | |
59 | bool Tflag; /* -T given */ | |
60 | # endif DEBUG | |
61 | char FromHost[200]; /* string to prepend to addresses */ | |
62 | \f/* | |
63 | ** MAIN -- Main program for arpa mailer | |
64 | ** | |
65 | ** Processes arguments, and calls sendmail successively on | |
66 | ** the To: list. | |
67 | ** | |
68 | ** Algorithm: | |
69 | ** Scan for debug flag. | |
70 | ** Catch interrupt signals. | |
71 | ** Collect input file name and from person. | |
72 | ** If more than one person in the to list, and | |
73 | ** if the input file is not a real file, | |
74 | ** collect input into a temp file. | |
75 | ** For each person in the to list | |
76 | ** Send to that person. | |
77 | ** | |
78 | ** Parameters: | |
79 | ** argc | |
80 | ** argv -- as usual | |
81 | ** | |
82 | ** Returns: | |
83 | ** via exit | |
84 | ** | |
85 | ** Side Effects: | |
86 | ** Mail gets sent. | |
87 | ** | |
88 | ** Called By: | |
89 | ** /etc/delivermail | |
90 | ** | |
91 | ** Author: | |
92 | ** Eric Allman UCB/INGRES. | |
93 | */ | |
94 | ||
95 | main(argc, argv) | |
96 | int argc; | |
97 | char **argv; | |
98 | { | |
99 | register int i; | |
100 | register char *p; | |
101 | register int ifd; | |
102 | char buf[512]; | |
103 | extern int finis(); | |
104 | extern char *locv(); | |
105 | register char *q; | |
106 | char *lastmark; | |
107 | ||
108 | State = 3; | |
109 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) | |
110 | signal(SIGINT, finis); | |
111 | ||
112 | /* process flags */ | |
113 | argv[argc] = 0; | |
114 | # ifdef DEBUG | |
115 | if (strcmp(argv[1], "-T") == 0) | |
116 | { | |
117 | Tflag++; | |
118 | argv++; | |
119 | argc--; | |
120 | printf("%s\n", Version); | |
121 | } | |
122 | # endif DEBUG | |
123 | ||
124 | if (argc != 4) | |
125 | { | |
126 | rexit (EX_SOFTWARE); | |
127 | } | |
128 | ||
129 | /* decode parameters */ | |
130 | From = argv[1]; | |
131 | lastmark = &FromHost[-1]; | |
132 | for (p = From, q = FromHost; (*q = *p) != '\0'; p++, q++) | |
133 | { | |
134 | if (*p == ':') | |
135 | *q = *p = '.'; | |
136 | if (*q == '.' || *q == '!' || *q == '@') | |
137 | lastmark = q; | |
138 | } | |
139 | lastmark[1] = '\0'; | |
140 | ||
141 | /* start sending mail */ | |
142 | State = sendmail(argv[2], argv[3]); | |
143 | ||
144 | /* all done, clean up */ | |
145 | finis(); | |
146 | } | |
147 | \f/* | |
148 | ** FINIS -- Finish up, remove temp files, etc. | |
149 | ** | |
150 | ** This does basic cleanup on interrupt, error, or | |
151 | ** normal termination. It uses "State" to tell which | |
152 | ** is happening. | |
153 | ** | |
154 | ** Parameters: | |
155 | ** none | |
156 | ** | |
157 | ** Returns: | |
158 | ** none | |
159 | ** | |
160 | ** Side Effects: | |
161 | ** Exit(State). | |
162 | ** | |
163 | ** Called By: | |
164 | ** interrupt signal. | |
165 | ** main | |
166 | */ | |
167 | ||
168 | finis() | |
169 | { | |
170 | rexit(State); | |
171 | } | |
172 | ||
173 | /* | |
174 | ** REXIT -- exit, reporting error code if -T given | |
175 | ** | |
176 | ** Parameters: | |
177 | ** e -- error code to exit with; see sysexits.h | |
178 | ** | |
179 | ** Returns: | |
180 | ** none | |
181 | ** | |
182 | ** Side Effects: | |
183 | ** Exit(e). | |
184 | ** | |
185 | ** Called By: | |
186 | ** main | |
187 | ** finis | |
188 | ** sendmail | |
189 | */ | |
190 | rexit(e) | |
191 | { | |
192 | ||
193 | # ifdef DEBUG | |
194 | if (Tflag) | |
195 | fprintf(stderr, "arpa-mail: return code %d\n", e); | |
196 | # endif | |
197 | exit(e); | |
198 | } | |
199 | \f/* | |
200 | ** SENDMAIL -- Queue up mail for the arpanet mailer. | |
201 | ** | |
202 | ** The mail is inserted with proper headers into the | |
203 | ** arpanet queue directory. | |
204 | ** | |
205 | ** Algorithm: | |
206 | ** decode "to" address | |
207 | ** if error, exit. | |
208 | ** create a spool file name. | |
209 | ** output the header information to spool file, | |
210 | ** separate names in To:, CC: fields with commas. | |
211 | ** copy the mail to the spool file. | |
212 | ** | |
213 | ** Parameters: | |
214 | ** host -- the host to send to. | |
215 | ** user -- the user to send to. | |
216 | ** | |
217 | ** Returns: | |
218 | ** none | |
219 | ** | |
220 | ** Side Effects: | |
221 | ** the mail is copied into a file in the network | |
222 | ** queue directory (/usr/spool/netmail). | |
223 | ** | |
224 | ** Called By: | |
225 | ** main | |
226 | */ | |
227 | ||
228 | sendmail(host, user) | |
229 | char *host; | |
230 | char *user; | |
231 | { | |
232 | char spoolfile[50]; /* gets the spool file name */ | |
233 | register int i; | |
234 | register char *p; | |
235 | static int callnum; /* for the final letter on spoolfile */ | |
236 | char buf[512]; | |
237 | register FILE *sfp; /* spool file */ | |
238 | register int c; | |
239 | extern char *matchhdr(); | |
240 | ||
241 | /* verify that the host exists */ | |
242 | #ifndef TESTING | |
243 | strcpy(buf, "/dev/net/"); | |
244 | strcat(buf, host); | |
245 | if (host[0] == '\0' || access(buf, 0) < 0) | |
246 | return (EX_NOHOST); | |
247 | #endif TESTING | |
248 | ||
249 | /* | |
250 | ** Create spool file name. | |
251 | ** Format is "username000nnX", where username is | |
252 | ** padded on the right with zeros and nn (the process | |
253 | ** id) is padded on the left with zeros; X is a unique | |
254 | ** sequence character. | |
255 | */ | |
256 | ||
257 | # ifdef DEBUG | |
258 | if (Tflag) | |
259 | strcpy(spoolfile, "test.out"); | |
260 | # endif DEBUG | |
261 | else | |
262 | sprintf(spoolfile, "%s/arpamail%05d%c", SPOOLDIR, getpid(), 'a' + callnum++); | |
263 | ||
264 | /* create spool file */ | |
265 | sfp = fopen(spoolfile, "w"); | |
266 | if (sfp == NULL) | |
267 | { | |
268 | spoolerr: | |
269 | return (EX_OSERR); | |
270 | } | |
271 | # ifdef DEBUG | |
272 | if (!Tflag) | |
273 | # endif DEBUG | |
274 | chmod(spoolfile, 0400); | |
275 | ||
276 | /* | |
277 | ** Output mailer control lines. | |
278 | ** These lines are as follows: | |
279 | ** /dev/net/<hostname> {target host} | |
280 | ** user-name {at target host} | |
281 | ** /mnt/eric {pathname of sender; not used} | |
282 | ** eric {name of user who is sending} | |
283 | */ | |
284 | ||
285 | fputs(buf, sfp); | |
286 | fputs("\n", sfp); | |
287 | fputs(user, sfp); | |
288 | fputs("\n\n", sfp); | |
289 | fputs(From, sfp); | |
290 | fputs("\n", sfp); | |
291 | ||
292 | /* | |
293 | ** Output the mail | |
294 | ** Check the first line for the date. If not found, | |
295 | ** assume the message is not in arpanet standard format | |
296 | ** and output a "Date:" and "From:" header. | |
297 | */ | |
298 | ||
299 | if (fgets(buf, sizeof buf, stdin) == NULL) | |
300 | { | |
301 | /* no message */ | |
302 | unlink(spoolfile); | |
303 | return (EX_OK); | |
304 | } | |
4b9ccde7 C |
305 | if (strncmp("From ", buf, 5) == 0) |
306 | { | |
307 | /* strip Unix "From" line */ | |
308 | /* should save the date here */ | |
309 | fgets(buf, sizeof buf, stdin); | |
310 | } | |
31cef89c BJ |
311 | if (matchhdr(buf, "date") == NULL) |
312 | putdate(sfp); | |
313 | if (!ishdr(buf)) | |
314 | { | |
315 | putc('\n', sfp); | |
316 | goto hdrdone; | |
317 | } | |
318 | ||
319 | /* | |
320 | ** At this point, we have a message with REAL headers. | |
321 | ** We look at each head line and insert commas if it | |
322 | ** is a To: or Cc: field. | |
323 | */ | |
324 | ||
325 | do | |
326 | { | |
327 | if (!ishdr(buf)) | |
328 | break; | |
329 | if (!matchhdr(buf, "to") && !matchhdr(buf, "cc")) | |
330 | { | |
331 | fputs(buf, sfp); | |
332 | continue; | |
333 | } | |
334 | /* gotcha! */ | |
335 | rewrite(buf, 1, sfp); | |
336 | while (isspace(c = peekc(stdin)) && c != '\n') | |
337 | { | |
338 | fgets(buf, BUFSIZ, stdin); | |
339 | rewrite(buf, 0, sfp); | |
340 | } | |
341 | } while (fgets(buf, BUFSIZ, stdin) != NULL); | |
342 | ||
343 | hdrdone: | |
344 | /* output the rest of the header & the body of the letter */ | |
345 | do | |
346 | { | |
347 | fputs(buf, sfp); | |
348 | if (ferror(sfp)) | |
349 | goto spoolerr; | |
350 | } while (fgets(buf, sizeof buf, stdin) != NULL); | |
351 | ||
352 | /* all done! */ | |
353 | fclose(sfp); | |
354 | return (EX_OK); | |
355 | } | |
356 | \f/* | |
357 | ** REWRITE -- Output header line with needed commas. | |
358 | ** | |
359 | ** Parameters: | |
360 | ** buf -- header line | |
361 | ** first -- true if this is not a continuation | |
362 | ** | |
363 | ** Returns: | |
364 | ** none | |
365 | ** | |
366 | ** Side effects: | |
367 | ** The contents of buf is copied onto the spool file with | |
368 | ** with the right commas interlaced | |
369 | ** | |
370 | ** Called by: | |
371 | ** sendmail | |
372 | */ | |
373 | ||
374 | rewrite(buf, first, spf) | |
375 | char buf[]; | |
376 | register FILE *spf; | |
377 | { | |
378 | register char *cp; | |
379 | register int c; | |
380 | char word[BUFSIZ], word2[BUFSIZ]; | |
381 | char *gword(); | |
382 | static char wsep[] = ", "; | |
383 | ||
384 | cp = buf; | |
385 | if (first) | |
386 | { | |
387 | while (*cp != ':' && *cp) | |
388 | putc(*cp++, spf); | |
389 | if (*cp == ':') | |
390 | { | |
391 | fputs(": ", spf); | |
392 | cp++; | |
393 | } | |
394 | } | |
395 | else | |
396 | while (*cp && isspace(*cp)) | |
397 | putc(*cp++, spf); | |
398 | cp = gword(word, cp); | |
399 | if (strlen(word) == 0) | |
400 | { | |
401 | putc('\n', spf); | |
402 | goto test; | |
403 | } | |
404 | for (;;) | |
405 | { | |
406 | cp = gword(word2, cp); | |
407 | if (strlen(word2) == 0) | |
408 | { | |
409 | putaddr(word, spf); | |
410 | break; | |
411 | } | |
412 | if (strcmp(word2, "%") == 0) | |
413 | word2[0] = '@'; | |
414 | if (strcmp(word2, "@") && strcmp(word2, "at")) | |
415 | { | |
416 | putaddr(word, spf); | |
417 | fputs(wsep, spf); | |
418 | strcpy(word, word2); | |
419 | continue; | |
420 | } | |
421 | fputs(word, spf); | |
422 | if (word2[0] == '@') | |
423 | putc('@', spf); | |
424 | else | |
425 | fputs(" at ", spf); | |
426 | cp = gword(word, cp); | |
427 | fputs(word, spf); | |
428 | cp = gword(word, cp); | |
429 | if (strlen(word)) | |
430 | fputs(wsep, spf); | |
431 | } | |
432 | ||
433 | test: | |
434 | c = peekc(stdin); | |
435 | if (isspace(c) && c != '\n') | |
436 | fputs(",\n", spf); | |
437 | else | |
438 | putc('\n', spf); | |
439 | } | |
440 | \f/* | |
441 | ** PUTADDR -- output address onto file | |
442 | ** | |
443 | ** Putaddr prepends the network header onto the address | |
444 | ** unless one already exists. | |
445 | ** | |
446 | ** Parameters: | |
447 | ** name -- the name to output. | |
448 | ** fp -- the file to put it on. | |
449 | ** | |
450 | ** Returns: | |
451 | ** none. | |
452 | ** | |
453 | ** Side Effects: | |
454 | ** name is put onto fp. | |
455 | */ | |
456 | ||
457 | putaddr(name, fp) | |
458 | char *name; | |
459 | FILE *fp; | |
460 | { | |
461 | register char *p; | |
462 | ||
463 | if (strlen(name) == 0) | |
464 | return; | |
465 | for (p = name; *p != '\0' && *p != ':' && *p != '.' && *p != '@' && | |
466 | *p != '!' && *p != '^'; p++) | |
467 | continue; | |
468 | if (*p == ':') | |
469 | *p = '.'; | |
470 | else if (*p == '\0') | |
471 | fputs(FromHost, fp); | |
472 | fputs(name, fp); | |
473 | if (*p != '@') | |
474 | fputs("@Berkeley", fp); | |
475 | } | |
476 | \f/* | |
477 | ** PEEKC -- peek at next character in input file | |
478 | ** | |
479 | ** Parameters: | |
480 | ** fp -- stdio file buffer | |
481 | ** | |
482 | ** Returns: | |
483 | ** the next character in the input or EOF | |
484 | ** | |
485 | ** Side effects: | |
486 | ** None. | |
487 | ** | |
488 | ** Called by: | |
489 | ** sendmail | |
490 | ** rewrite | |
491 | */ | |
492 | peekc(fp) | |
493 | register FILE *fp; | |
494 | { | |
495 | register int c; | |
496 | ||
497 | c = getc(fp); | |
498 | ungetc(c, fp); | |
499 | return(c); | |
500 | } | |
501 | ||
502 | \f/* | |
503 | ** GWORD -- get the next liberal word from a string | |
504 | ** | |
505 | ** Parameters: | |
506 | ** buf -- place to put scanned word | |
507 | ** p -- place to start looking for word | |
508 | ** | |
509 | ** Returns: | |
510 | ** updated value of p or 0 if no more left after this | |
511 | ** | |
512 | ** Side effects: | |
513 | ** buf gets the liberal word scanned. | |
514 | ** buf will be length 0 if there is no more input, | |
515 | ** or if p was passed as 0 | |
516 | ** | |
517 | ** Called by: | |
518 | ** rewrite | |
519 | */ | |
520 | char * | |
521 | gword(buf, p) | |
522 | char buf[]; | |
523 | register char *p; | |
524 | { | |
525 | register char *sp, *dp; | |
526 | ||
527 | strcpy(buf, ""); | |
528 | if (p == 0) | |
529 | return(0); | |
530 | sp = p; | |
531 | while (*sp && (isspace(*sp) || *sp == ',')) | |
532 | sp++; | |
533 | dp = buf; | |
534 | if (*sp != '%' && *sp != '@') | |
535 | { | |
536 | while (*sp && !isspace(*sp) && *sp != ',' && *sp != '%' && *sp != '@') | |
537 | *dp++ = *sp++; | |
538 | } | |
539 | else | |
540 | *dp++ = *sp++; | |
541 | *dp = 0; | |
542 | if (*sp == 0) | |
543 | return(0); | |
544 | return(sp); | |
545 | } | |
546 | \f/* | |
547 | ** ISHDR -- see if the passed line is a ARPA style header line | |
548 | ** | |
549 | ** Parameters: | |
550 | ** buf -- header line | |
551 | ** | |
552 | ** Returns: | |
553 | ** non-zero if the line is a header line, else zero | |
554 | ** | |
555 | ** Side effects: | |
556 | ** none | |
557 | ** | |
558 | ** Called by: | |
559 | ** sendmail | |
560 | */ | |
561 | ishdr(buf) | |
562 | char buf[]; | |
563 | { | |
564 | register char *p; | |
565 | ||
566 | p = buf; | |
567 | if (isspace(*p)) | |
568 | p = 0; | |
569 | else | |
570 | { | |
571 | while (*p != ':' && !isspace(*p)) | |
572 | p++; | |
573 | while (isspace(*p)) | |
574 | p++; | |
575 | if (*p != ':') | |
576 | p = 0; | |
577 | } | |
578 | return(p != 0); | |
579 | } | |
580 | \f/* | |
581 | ** PUTDATE -- Put the date & from field into the message. | |
582 | ** | |
583 | ** Parameters: | |
584 | ** fp -- file to put them onto. | |
585 | ** | |
586 | ** Returns: | |
587 | ** none | |
588 | ** | |
589 | ** Side Effects: | |
590 | ** output onto fp. | |
591 | ** | |
592 | ** Called By: | |
593 | ** sendmail | |
594 | */ | |
595 | ||
596 | putdate(fp) | |
597 | register FILE *fp; | |
598 | { | |
599 | register char *p; | |
600 | ||
601 | fputs("Date: ", fp); | |
602 | fputs(arpadate(), fp); | |
603 | ||
604 | /* output from field */ | |
605 | fputs("\nFrom: ", fp); | |
606 | fputs(From, fp); | |
607 | fputs(" at Berkeley\n", fp); | |
608 | } |