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c988f1f4 | 1 | /* $Cambridge: exim/src/src/transports/autoreply.c,v 1.2 2005/01/04 10:00:45 ph10 Exp $ */ |
0756eb3c PH |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
c988f1f4 | 7 | /* Copyright (c) University of Cambridge 1995 - 2005 */ |
0756eb3c PH |
8 | /* See the file NOTICE for conditions of use and distribution. */ |
9 | ||
10 | ||
11 | #include "../exim.h" | |
12 | #include "autoreply.h" | |
13 | ||
14 | ||
15 | ||
16 | /* Options specific to the autoreply transport. They must be in alphabetic | |
17 | order (note that "_" comes before the lower case letters). Those starting | |
18 | with "*" are not settable by the user but are used by the option-reading | |
19 | software for alternative value types. Some options are publicly visible and so | |
20 | are stored in the driver instance block. These are flagged with opt_public. */ | |
21 | ||
22 | optionlist autoreply_transport_options[] = { | |
23 | { "bcc", opt_stringptr, | |
24 | (void *)offsetof(autoreply_transport_options_block, bcc) }, | |
25 | { "cc", opt_stringptr, | |
26 | (void *)offsetof(autoreply_transport_options_block, cc) }, | |
27 | { "file", opt_stringptr, | |
28 | (void *)offsetof(autoreply_transport_options_block, file) }, | |
29 | { "file_expand", opt_bool, | |
30 | (void *)offsetof(autoreply_transport_options_block, file_expand) }, | |
31 | { "file_optional", opt_bool, | |
32 | (void *)offsetof(autoreply_transport_options_block, file_optional) }, | |
33 | { "from", opt_stringptr, | |
34 | (void *)offsetof(autoreply_transport_options_block, from) }, | |
35 | { "headers", opt_stringptr, | |
36 | (void *)offsetof(autoreply_transport_options_block, headers) }, | |
37 | { "log", opt_stringptr, | |
38 | (void *)offsetof(autoreply_transport_options_block, logfile) }, | |
39 | { "mode", opt_octint, | |
40 | (void *)offsetof(autoreply_transport_options_block, mode) }, | |
41 | { "never_mail", opt_stringptr, | |
42 | (void *)offsetof(autoreply_transport_options_block, never_mail) }, | |
43 | { "once", opt_stringptr, | |
44 | (void *)offsetof(autoreply_transport_options_block, oncelog) }, | |
45 | { "once_file_size", opt_int, | |
46 | (void *)offsetof(autoreply_transport_options_block, once_file_size) }, | |
47 | { "once_repeat", opt_stringptr, | |
48 | (void *)offsetof(autoreply_transport_options_block, once_repeat) }, | |
49 | { "reply_to", opt_stringptr, | |
50 | (void *)offsetof(autoreply_transport_options_block, reply_to) }, | |
51 | { "return_message", opt_bool, | |
52 | (void *)offsetof(autoreply_transport_options_block, return_message) }, | |
53 | { "subject", opt_stringptr, | |
54 | (void *)offsetof(autoreply_transport_options_block, subject) }, | |
55 | { "text", opt_stringptr, | |
56 | (void *)offsetof(autoreply_transport_options_block, text) }, | |
57 | { "to", opt_stringptr, | |
58 | (void *)offsetof(autoreply_transport_options_block, to) }, | |
59 | }; | |
60 | ||
61 | /* Size of the options list. An extern variable has to be used so that its | |
62 | address can appear in the tables drtables.c. */ | |
63 | ||
64 | int autoreply_transport_options_count = | |
65 | sizeof(autoreply_transport_options)/sizeof(optionlist); | |
66 | ||
67 | /* Default private options block for the autoreply transport. */ | |
68 | ||
69 | autoreply_transport_options_block autoreply_transport_option_defaults = { | |
70 | NULL, /* from */ | |
71 | NULL, /* reply_to */ | |
72 | NULL, /* to */ | |
73 | NULL, /* cc */ | |
74 | NULL, /* bcc */ | |
75 | NULL, /* subject */ | |
76 | NULL, /* headers */ | |
77 | NULL, /* text */ | |
78 | NULL, /* file */ | |
79 | NULL, /* logfile */ | |
80 | NULL, /* oncelog */ | |
81 | NULL, /* once_repeat */ | |
82 | NULL, /* never_mail */ | |
83 | 0600, /* mode */ | |
84 | 0, /* once_file_size */ | |
85 | FALSE, /* file_expand */ | |
86 | FALSE, /* file_optional */ | |
87 | FALSE /* return message */ | |
88 | }; | |
89 | ||
90 | ||
91 | ||
92 | /* Type of text for the checkexpand() function */ | |
93 | ||
94 | enum { cke_text, cke_hdr, cke_file }; | |
95 | ||
96 | ||
97 | ||
98 | /************************************************* | |
99 | * Initialization entry point * | |
100 | *************************************************/ | |
101 | ||
102 | /* Called for each instance, after its options have been read, to | |
103 | enable consistency checks to be done, or anything else that needs | |
104 | to be set up. */ | |
105 | ||
106 | void | |
107 | autoreply_transport_init(transport_instance *tblock) | |
108 | { | |
109 | /* | |
110 | autoreply_transport_options_block *ob = | |
111 | (autoreply_transport_options_block *)(tblock->options_block); | |
112 | */ | |
113 | ||
114 | /* If a fixed uid field is set, then a gid field must also be set. */ | |
115 | ||
116 | if (tblock->uid_set && !tblock->gid_set && tblock->expand_gid == NULL) | |
117 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
118 | "user set without group for the %s transport", tblock->name); | |
119 | } | |
120 | ||
121 | ||
122 | ||
123 | ||
124 | /************************************************* | |
125 | * Expand string and check * | |
126 | *************************************************/ | |
127 | ||
128 | /* If the expansion fails, the error is set up in the address. Expanded | |
129 | strings must be checked to ensure they contain only printing characters | |
130 | and white space. If not, the function fails. | |
131 | ||
132 | Arguments: | |
133 | s string to expand | |
134 | addr address that is being worked on | |
135 | name transport name, for error text | |
136 | type type, for checking content: | |
137 | cke_text => no check | |
138 | cke_hdr => header, allow \n + whitespace | |
139 | cke_file => file name, no non-printers allowed | |
140 | ||
141 | Returns: expanded string if expansion succeeds; | |
142 | NULL otherwise | |
143 | */ | |
144 | ||
145 | static uschar * | |
146 | checkexpand(uschar *s, address_item *addr, uschar *name, int type) | |
147 | { | |
148 | uschar *t; | |
149 | uschar *ss = expand_string(s); | |
150 | ||
151 | if (ss == NULL) | |
152 | { | |
153 | addr->transport_return = FAIL; | |
154 | addr->message = string_sprintf("Expansion of \"%s\" failed in %s transport: " | |
155 | "%s", s, name, expand_string_message); | |
156 | return NULL; | |
157 | } | |
158 | ||
159 | if (type != cke_text) for (t = ss; *t != 0; t++) | |
160 | { | |
161 | int c = *t; | |
162 | if (mac_isprint(c)) continue; | |
163 | if (type == cke_hdr && c == '\n' && (t[1] == ' ' || t[1] == '\t')) continue; | |
164 | s = string_printing(s); | |
165 | addr->transport_return = FAIL; | |
166 | addr->message = string_sprintf("Expansion of \"%s\" in %s transport " | |
167 | "contains non-printing character %d", s, name, c); | |
168 | return NULL; | |
169 | } | |
170 | ||
171 | return ss; | |
172 | } | |
173 | ||
174 | ||
175 | ||
176 | ||
177 | /************************************************* | |
178 | * Check a header line for never_mail * | |
179 | *************************************************/ | |
180 | ||
181 | /* This is called to check to, cc, and bcc for addresses in the never_mail | |
182 | list. Any that are found are removed. | |
183 | ||
184 | Arguments: | |
185 | listptr points to the list of addresses | |
186 | never_mail an address list, already expanded | |
187 | ||
188 | Returns: nothing | |
189 | */ | |
190 | ||
191 | static void | |
192 | check_never_mail(uschar **listptr, uschar *never_mail) | |
193 | { | |
194 | uschar *s = *listptr; | |
195 | ||
196 | while (*s != 0) | |
197 | { | |
198 | uschar *error, *next; | |
199 | uschar *e = parse_find_address_end(s, FALSE); | |
200 | int terminator = *e; | |
201 | int start, end, domain, rc; | |
202 | ||
203 | /* Temporarily terminate the string at the address end while extracting | |
204 | the operative address within. */ | |
205 | ||
206 | *e = 0; | |
207 | next = parse_extract_address(s, &error, &start, &end, &domain, FALSE); | |
208 | *e = terminator; | |
209 | ||
210 | /* If there is some kind of syntax error, just give up on this header | |
211 | line. */ | |
212 | ||
213 | if (next == NULL) break; | |
214 | ||
215 | /* See if the address is on the never_mail list */ | |
216 | ||
217 | rc = match_address_list(next, /* address to check */ | |
218 | TRUE, /* start caseless */ | |
219 | FALSE, /* don't expand the list */ | |
220 | &never_mail, /* the list */ | |
221 | NULL, /* no caching */ | |
222 | -1, /* no expand setup */ | |
223 | 0, /* separator from list */ | |
224 | NULL); /* no lookup value return */ | |
225 | ||
226 | if (rc == OK) /* Remove this address */ | |
227 | { | |
228 | DEBUG(D_transport) | |
229 | debug_printf("discarding recipient %s (matched never_mail)\n", next); | |
230 | if (terminator == ',') e++; | |
231 | memmove(s, e, Ustrlen(e) + 1); | |
232 | } | |
233 | else /* Skip over this address */ | |
234 | { | |
235 | s = e; | |
236 | if (terminator == ',') s++; | |
237 | } | |
238 | } | |
239 | ||
240 | /* Check to see if we removed the last address, leaving a terminating comma | |
241 | that needs to be removed */ | |
242 | ||
243 | s = *listptr + Ustrlen(*listptr); | |
244 | while (s > *listptr && (isspace(s[-1]) || s[-1] == ',')) s--; | |
245 | *s = 0; | |
246 | ||
247 | /* Check to see if there any addresses left; if not, set NULL */ | |
248 | ||
249 | s = *listptr; | |
250 | while (s != 0 && isspace(*s)) s++; | |
251 | if (*s == 0) *listptr = NULL; | |
252 | } | |
253 | ||
254 | ||
255 | ||
256 | /************************************************* | |
257 | * Main entry point * | |
258 | *************************************************/ | |
259 | ||
260 | /* See local README for interface details. This transport always returns | |
261 | FALSE, indicating that the top address has the status for all - though in fact | |
262 | this transport can handle only one address at at time anyway. */ | |
263 | ||
264 | BOOL | |
265 | autoreply_transport_entry( | |
266 | transport_instance *tblock, /* data for this instantiation */ | |
267 | address_item *addr) /* address we are working on */ | |
268 | { | |
269 | int fd, pid, rc; | |
270 | int cache_fd = -1; | |
271 | int log_fd = -1; | |
272 | int cache_size = 0; | |
273 | int add_size = 0; | |
274 | EXIM_DB *dbm_file = NULL; | |
275 | BOOL file_expand, return_message; | |
276 | uschar *from, *reply_to, *to, *cc, *bcc, *subject, *headers, *text, *file; | |
277 | uschar *logfile, *oncelog; | |
278 | uschar *cache_buff = NULL; | |
279 | uschar *cache_time = NULL; | |
280 | header_line *h; | |
281 | time_t now = time(NULL); | |
282 | time_t once_repeat_sec = 0; | |
283 | FILE *f; | |
284 | FILE *ff = NULL; | |
285 | ||
286 | autoreply_transport_options_block *ob = | |
287 | (autoreply_transport_options_block *)(tblock->options_block); | |
288 | ||
289 | DEBUG(D_transport) debug_printf("%s transport entered\n", tblock->name); | |
290 | ||
291 | /* Set up for the good case */ | |
292 | ||
293 | addr->transport_return = OK; | |
294 | addr->basic_errno = 0; | |
295 | ||
296 | /* If the address is pointing to a reply block, then take all the data | |
297 | from that block. It has typically been set up by a mail filter processing | |
298 | router. Otherwise, the data must be supplied by this transport, and | |
299 | it has to be expanded here. */ | |
300 | ||
301 | if (addr->reply != NULL) | |
302 | { | |
303 | DEBUG(D_transport) debug_printf("taking data from address\n"); | |
304 | from = addr->reply->from; | |
305 | reply_to = addr->reply->reply_to; | |
306 | to = addr->reply->to; | |
307 | cc = addr->reply->cc; | |
308 | bcc = addr->reply->bcc; | |
309 | subject = addr->reply->subject; | |
310 | headers = addr->reply->headers; | |
311 | text = addr->reply->text; | |
312 | file = addr->reply->file; | |
313 | logfile = addr->reply->logfile; | |
314 | oncelog = addr->reply->oncelog; | |
315 | once_repeat_sec = addr->reply->once_repeat; | |
316 | file_expand = addr->reply->file_expand; | |
317 | expand_forbid = addr->reply->expand_forbid; | |
318 | return_message = addr->reply->return_message; | |
319 | } | |
320 | else | |
321 | { | |
322 | uschar *oncerepeat = ob->once_repeat; | |
323 | ||
324 | DEBUG(D_transport) debug_printf("taking data from transport\n"); | |
325 | from = ob->from; | |
326 | reply_to = ob->reply_to; | |
327 | to = ob->to; | |
328 | cc = ob->cc; | |
329 | bcc = ob->bcc; | |
330 | subject = ob->subject; | |
331 | headers = ob->headers; | |
332 | text = ob->text; | |
333 | file = ob->file; | |
334 | logfile = ob->logfile; | |
335 | oncelog = ob->oncelog; | |
336 | file_expand = ob->file_expand; | |
337 | return_message = ob->return_message; | |
338 | ||
339 | if ((from != NULL && | |
340 | (from = checkexpand(from, addr, tblock->name, cke_hdr)) == NULL) || | |
341 | (reply_to != NULL && | |
342 | (reply_to = checkexpand(reply_to, addr, tblock->name, cke_hdr)) == NULL) || | |
343 | (to != NULL && | |
344 | (to = checkexpand(to, addr, tblock->name, cke_hdr)) == NULL) || | |
345 | (cc != NULL && | |
346 | (cc = checkexpand(cc, addr, tblock->name, cke_hdr)) == NULL) || | |
347 | (bcc != NULL && | |
348 | (bcc = checkexpand(bcc, addr, tblock->name, cke_hdr)) == NULL) || | |
349 | (subject != NULL && | |
350 | (subject = checkexpand(subject, addr, tblock->name, cke_hdr)) == NULL) || | |
351 | (headers != NULL && | |
352 | (headers = checkexpand(headers, addr, tblock->name, cke_text)) == NULL) || | |
353 | (text != NULL && | |
354 | (text = checkexpand(text, addr, tblock->name, cke_text)) == NULL) || | |
355 | (file != NULL && | |
356 | (file = checkexpand(file, addr, tblock->name, cke_file)) == NULL) || | |
357 | (logfile != NULL && | |
358 | (logfile = checkexpand(logfile, addr, tblock->name, cke_file)) == NULL) || | |
359 | (oncelog != NULL && | |
360 | (oncelog = checkexpand(oncelog, addr, tblock->name, cke_file)) == NULL) || | |
361 | (oncerepeat != NULL && | |
362 | (oncerepeat = checkexpand(oncerepeat, addr, tblock->name, cke_file)) == NULL)) | |
363 | return FALSE; | |
364 | ||
365 | if (oncerepeat != NULL) | |
366 | { | |
367 | once_repeat_sec = readconf_readtime(oncerepeat, 0, FALSE); | |
368 | if (once_repeat_sec < 0) | |
369 | { | |
370 | addr->transport_return = FAIL; | |
371 | addr->message = string_sprintf("Invalid time value \"%s\" for " | |
372 | "\"once_repeat\" in %s transport", oncerepeat, tblock->name); | |
373 | return FALSE; | |
374 | } | |
375 | } | |
376 | } | |
377 | ||
378 | /* If the never_mail option is set, we have to scan all the recipients and | |
379 | remove those that match. */ | |
380 | ||
381 | if (ob->never_mail != NULL) | |
382 | { | |
383 | uschar *never_mail = expand_string(ob->never_mail); | |
384 | ||
385 | if (never_mail == NULL) | |
386 | { | |
387 | addr->transport_return = FAIL; | |
388 | addr->message = string_sprintf("Failed to expand \"%s\" for " | |
389 | "\"never_mail\" in %s transport", ob->never_mail, tblock->name); | |
390 | return FALSE; | |
391 | } | |
392 | ||
393 | if (to != NULL) check_never_mail(&to, never_mail); | |
394 | if (cc != NULL) check_never_mail(&cc, never_mail); | |
395 | if (bcc != NULL) check_never_mail(&bcc, never_mail); | |
396 | ||
397 | if (to == NULL && cc == NULL && bcc == NULL) | |
398 | { | |
399 | DEBUG(D_transport) | |
400 | debug_printf("*** all recipients removed by never_mail\n"); | |
401 | return OK; | |
402 | } | |
403 | } | |
404 | ||
405 | /* If the -N option is set, can't do any more. */ | |
406 | ||
407 | if (dont_deliver) | |
408 | { | |
409 | DEBUG(D_transport) | |
410 | debug_printf("*** delivery by %s transport bypassed by -N option\n", | |
411 | tblock->name); | |
412 | return FALSE; | |
413 | } | |
414 | ||
415 | ||
416 | /* If the oncelog field is set, we send want to send only one message to the | |
417 | given recipient(s). This works only on the "To" field. If there is no "To" | |
418 | field, the message is always sent. If the To: field contains more than one | |
419 | recipient, the effect might not be quite as envisaged. If once_file_size is | |
420 | set, instead of a dbm file, we use a regular file containing a circular buffer | |
421 | recipient cache. */ | |
422 | ||
423 | if (oncelog != NULL && to != NULL) | |
424 | { | |
425 | time_t then = 0; | |
426 | ||
427 | /* Handle fixed-size cache file. */ | |
428 | ||
429 | if (ob->once_file_size > 0) | |
430 | { | |
431 | uschar *p; | |
432 | struct stat statbuf; | |
433 | cache_fd = Uopen(oncelog, O_CREAT|O_RDWR, ob->mode); | |
434 | ||
435 | if (cache_fd < 0 || fstat(cache_fd, &statbuf) != 0) | |
436 | { | |
437 | addr->transport_return = DEFER; | |
438 | addr->message = string_sprintf("Failed to %s \"once\" file %s when " | |
439 | "sending message from %s transport: %s", | |
440 | (cache_fd < 0)? "open" : "stat", oncelog, tblock->name, | |
441 | strerror(errno)); | |
442 | goto END_OFF; | |
443 | } | |
444 | ||
445 | /* Get store in the temporary pool and read the entire file into it. We get | |
446 | an amount of store that is big enough to add the new entry on the end if we | |
447 | need to do that. */ | |
448 | ||
449 | cache_size = statbuf.st_size; | |
450 | add_size = sizeof(time_t) + Ustrlen(to) + 1; | |
451 | cache_buff = store_get(cache_size + add_size); | |
452 | ||
453 | if (read(cache_fd, cache_buff, cache_size) != cache_size) | |
454 | { | |
455 | addr->transport_return = DEFER; | |
456 | addr->basic_errno = errno; | |
457 | addr->message = US"error while reading \"once\" file"; | |
458 | goto END_OFF; | |
459 | } | |
460 | ||
461 | DEBUG(D_transport) debug_printf("%d bytes read from %s\n", cache_size, oncelog); | |
462 | ||
463 | /* Scan the data for this recipient. Each entry in the file starts with | |
464 | a time_t sized time value, followed by the address, followed by a binary | |
465 | zero. If we find a match, put the time into "then", and the place where it | |
466 | was found into "cache_time". Otherwise, "then" is left at zero. */ | |
467 | ||
468 | p = cache_buff; | |
469 | while (p < cache_buff + cache_size) | |
470 | { | |
471 | uschar *s = p + sizeof(time_t); | |
472 | uschar *nextp = s + Ustrlen(s) + 1; | |
473 | if (Ustrcmp(to, s) == 0) | |
474 | { | |
475 | memcpy(&then, p, sizeof(time_t)); | |
476 | cache_time = p; | |
477 | break; | |
478 | } | |
479 | p = nextp; | |
480 | } | |
481 | } | |
482 | ||
483 | /* Use a DBM file for the list of previous recipients. */ | |
484 | ||
485 | else | |
486 | { | |
487 | EXIM_DATUM key_datum, result_datum; | |
488 | EXIM_DBOPEN(oncelog, O_RDWR|O_CREAT, ob->mode, &dbm_file); | |
489 | if (dbm_file == NULL) | |
490 | { | |
491 | addr->transport_return = DEFER; | |
492 | addr->message = string_sprintf("Failed to open %s file %s when sending " | |
493 | "message from %s transport: %s", EXIM_DBTYPE, oncelog, tblock->name, | |
494 | strerror(errno)); | |
495 | goto END_OFF; | |
496 | } | |
497 | ||
498 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries need datums */ | |
499 | EXIM_DATUM_INIT(result_datum); /* to be cleared */ | |
500 | EXIM_DATUM_DATA(key_datum) = CS to; | |
501 | EXIM_DATUM_SIZE(key_datum) = Ustrlen(to) + 1; | |
502 | ||
503 | if (EXIM_DBGET(dbm_file, key_datum, result_datum)) | |
504 | { | |
505 | /* If the datum size is that of a binary time, we are in the new world | |
506 | where messages are sent periodically. Otherwise the file is an old one, | |
507 | where the datum was filled with a tod_log time, which is assumed to be | |
508 | different in size. For that, only one message is ever sent. This change | |
509 | introduced at Exim 3.00. In a couple of years' time the test on the size | |
510 | can be abolished. */ | |
511 | ||
512 | if (EXIM_DATUM_SIZE(result_datum) == sizeof(time_t)) | |
513 | { | |
514 | memcpy(&then, EXIM_DATUM_DATA(result_datum), sizeof(time_t)); | |
515 | } | |
516 | else then = now; | |
517 | } | |
518 | } | |
519 | ||
520 | /* Either "then" is set zero, if no message has yet been sent, or it | |
521 | is set to the time of the last sending. */ | |
522 | ||
523 | if (then != 0 && (once_repeat_sec <= 0 || now - then < once_repeat_sec)) | |
524 | { | |
525 | DEBUG(D_transport) debug_printf("message previously sent to %s%s\n", to, | |
526 | (once_repeat_sec > 0)? " and repeat time not reached" : ""); | |
527 | log_fd = Uopen(logfile, O_WRONLY|O_APPEND|O_CREAT, ob->mode); | |
528 | if (log_fd >= 0) | |
529 | { | |
530 | uschar *ptr = log_buffer; | |
531 | sprintf(CS ptr, "%s\n previously sent to %.200s\n", tod_stamp(tod_log), to); | |
532 | while(*ptr) ptr++; | |
533 | write(log_fd, log_buffer, ptr - log_buffer); | |
534 | close(log_fd); | |
535 | } | |
536 | goto END_OFF; | |
537 | } | |
538 | ||
539 | DEBUG(D_transport) debug_printf("%s %s\n", (then <= 0)? | |
540 | "no previous message sent to" : "repeat time reached for", to); | |
541 | } | |
542 | ||
543 | /* We are going to send a message. Ensure any requested file is available. */ | |
544 | ||
545 | if (file != NULL) | |
546 | { | |
547 | ff = Ufopen(file, "rb"); | |
548 | if (ff == NULL && !ob->file_optional) | |
549 | { | |
550 | addr->transport_return = DEFER; | |
551 | addr->message = string_sprintf("Failed to open file %s when sending " | |
552 | "message from %s transport: %s", file, tblock->name, strerror(errno)); | |
553 | return FALSE; | |
554 | } | |
555 | } | |
556 | ||
557 | /* Make a subprocess to send the message */ | |
558 | ||
559 | pid = child_open_exim(&fd); | |
560 | ||
561 | /* Creation of child failed; defer this delivery. */ | |
562 | ||
563 | if (pid < 0) | |
564 | { | |
565 | addr->transport_return = DEFER; | |
566 | addr->message = string_sprintf("Failed to create child process to send " | |
567 | "message from %s transport: %s", tblock->name, strerror(errno)); | |
568 | DEBUG(D_transport) debug_printf("%s\n", addr->message); | |
569 | return FALSE; | |
570 | } | |
571 | ||
572 | /* Create the message to be sent - recipients are taken from the headers, | |
573 | as the -t option is used. The "headers" stuff *must* be last in case there | |
574 | are newlines in it which might, if placed earlier, screw up other headers. */ | |
575 | ||
576 | f = fdopen(fd, "wb"); | |
577 | ||
578 | if (from != NULL) fprintf(f, "From: %s\n", from); | |
579 | if (reply_to != NULL) fprintf(f, "Reply-To: %s\n", reply_to); | |
580 | if (to != NULL) fprintf(f, "To: %s\n", to); | |
581 | if (cc != NULL) fprintf(f, "Cc: %s\n", cc); | |
582 | if (bcc != NULL) fprintf(f, "Bcc: %s\n", bcc); | |
583 | if (subject != NULL) fprintf(f, "Subject: %s\n", subject); | |
584 | ||
585 | /* Generate In-Reply-To from the message_id header; there should | |
586 | always be one, but code defensively. */ | |
587 | ||
588 | for (h = header_list; h != NULL; h = h->next) | |
589 | if (h->type == htype_id) break; | |
590 | ||
591 | if (h != NULL) | |
592 | { | |
593 | uschar *s = Ustrchr(h->text, ':') + 1; | |
594 | while (isspace(*s)) s++; | |
595 | fprintf(f, "In-Reply-To: %s", s); | |
596 | } | |
597 | ||
598 | /* Add an Auto-Submitted: header */ | |
599 | ||
600 | fprintf(f, "Auto-Submitted: auto-replied\n"); | |
601 | ||
602 | /* Add any specially requested headers */ | |
603 | ||
604 | if (headers != NULL) fprintf(f, "%s\n", headers); | |
605 | fprintf(f, "\n"); | |
606 | ||
607 | if (text != NULL) | |
608 | { | |
609 | fprintf(f, "%s", CS text); | |
610 | if (text[Ustrlen(text)-1] != '\n') fprintf(f, "\n"); | |
611 | } | |
612 | ||
613 | if (ff != NULL) | |
614 | { | |
615 | while (Ufgets(big_buffer, big_buffer_size, ff) != NULL) | |
616 | { | |
617 | if (file_expand) | |
618 | { | |
619 | uschar *s = expand_string(big_buffer); | |
620 | DEBUG(D_transport) | |
621 | { | |
622 | if (s == NULL) | |
623 | debug_printf("error while expanding line from file:\n %s\n %s\n", | |
624 | big_buffer, expand_string_message); | |
625 | } | |
626 | fprintf(f, "%s", (s == NULL)? CS big_buffer : CS s); | |
627 | } | |
628 | else fprintf(f, "%s", CS big_buffer); | |
629 | } | |
630 | } | |
631 | ||
632 | /* Copy the original message if required, observing the return size | |
633 | limit. */ | |
634 | ||
635 | if (return_message) | |
636 | { | |
637 | if (bounce_return_size_limit > 0) | |
638 | { | |
639 | struct stat statbuf; | |
640 | int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) * | |
641 | DELIVER_IN_BUFFER_SIZE; | |
642 | if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max) | |
643 | { | |
644 | int size = statbuf.st_size; /* Because might be a long */ | |
645 | fprintf(f, "\n" | |
646 | "------ This is a copy of the message, including all the headers.\n" | |
647 | "------ The body of the message is %d characters long; only the first\n" | |
648 | "------ %d or so are included here.\n\n", size, (max/1000)*1000); | |
649 | } | |
650 | else fprintf(f, "\n" | |
651 | "------ This is a copy of the message, including all the headers. ------\n\n"); | |
652 | } | |
653 | else fprintf(f, "\n" | |
654 | "------ This is a copy of the message, including all the headers. ------\n\n"); | |
655 | ||
656 | fflush(f); | |
657 | transport_count = 0; | |
658 | transport_write_message(addr, fileno(f), | |
659 | (tblock->body_only? topt_no_headers : 0) | | |
660 | (tblock->headers_only? topt_no_body : 0) | | |
661 | (tblock->return_path_add? topt_add_return_path : 0) | | |
662 | (tblock->delivery_date_add? topt_add_delivery_date : 0) | | |
663 | (tblock->envelope_to_add? topt_add_envelope_to : 0), | |
664 | bounce_return_size_limit, tblock->add_headers, tblock->remove_headers, | |
665 | NULL, NULL, tblock->rewrite_rules, tblock->rewrite_existflags); | |
666 | } | |
667 | ||
668 | /* End the message and wait for the child process to end; no timeout. */ | |
669 | ||
670 | fclose(f); | |
671 | rc = child_close(pid, 0); | |
672 | ||
673 | /* Update the "sent to" log whatever the yield. This errs on the side of | |
674 | missing out a message rather than risking sending more than one. We either have | |
675 | cache_fd set to a fixed size, circular buffer file, or dbm_file set to an open | |
676 | DBM file (or neither, if "once" is not set). */ | |
677 | ||
678 | /* Update fixed-size cache file. If cache_time is set, we found a previous | |
679 | entry; that is the spot into which to put the current time. Otherwise we have | |
680 | to add a new record; remove the first one in the file if the file is too big. | |
681 | We always rewrite the entire file in a single write operation. This is | |
682 | (hopefully) going to be the safest thing because there is no interlocking | |
683 | between multiple simultaneous deliveries. */ | |
684 | ||
685 | if (cache_fd >= 0) | |
686 | { | |
687 | uschar *from = cache_buff; | |
688 | int size = cache_size; | |
689 | (void)lseek(cache_fd, 0, SEEK_SET); | |
690 | ||
691 | if (cache_time == NULL) | |
692 | { | |
693 | cache_time = from + size; | |
694 | memcpy(cache_time + sizeof(time_t), to, add_size - sizeof(time_t)); | |
695 | size += add_size; | |
696 | ||
697 | if (cache_size > 0 && size > ob->once_file_size) | |
698 | { | |
699 | from += sizeof(time_t) + Ustrlen(from + sizeof(time_t)) + 1; | |
700 | size -= (from - cache_buff); | |
701 | } | |
702 | } | |
703 | ||
704 | memcpy(cache_time, &now, sizeof(time_t)); | |
705 | write(cache_fd, from, size); | |
706 | } | |
707 | ||
708 | /* Update DBM file */ | |
709 | ||
710 | else if (dbm_file != NULL) | |
711 | { | |
712 | EXIM_DATUM key_datum, value_datum; | |
713 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries need to have */ | |
714 | EXIM_DATUM_INIT(value_datum); /* cleared datums. */ | |
715 | EXIM_DATUM_DATA(key_datum) = CS to; | |
716 | EXIM_DATUM_SIZE(key_datum) = Ustrlen(to) + 1; | |
717 | ||
718 | /* Many OS define the datum value, sensibly, as a void *. However, there | |
719 | are some which still have char *. By casting this address to a char * we | |
720 | can avoid warning messages from the char * systems. */ | |
721 | ||
722 | EXIM_DATUM_DATA(value_datum) = CS (&now); | |
723 | EXIM_DATUM_SIZE(value_datum) = (int)sizeof(time_t); | |
724 | EXIM_DBPUT(dbm_file, key_datum, value_datum); | |
725 | } | |
726 | ||
727 | /* If sending failed, defer to try again - but if once is set the next | |
728 | try will skip, of course. However, if there were no recipients in the | |
729 | message, we do not fail. */ | |
730 | ||
731 | if (rc != 0) | |
732 | { | |
733 | if (rc == EXIT_NORECIPIENTS) | |
734 | { | |
735 | DEBUG(D_any) debug_printf("%s transport: message contained no recipients\n", | |
736 | tblock->name); | |
737 | } | |
738 | else | |
739 | { | |
740 | addr->transport_return = DEFER; | |
741 | addr->message = string_sprintf("Failed to send message from %s " | |
742 | "transport (%d)", tblock->name, rc); | |
743 | goto END_OFF; | |
744 | } | |
745 | } | |
746 | ||
747 | /* Log the sending of the message if successful and required. If the file | |
748 | fails to open, it's hard to know what to do. We cannot write to the Exim | |
749 | log from here, since we may be running under an unprivileged uid. We don't | |
750 | want to fail the delivery, since the message has been successfully sent. For | |
751 | the moment, ignore open failures. Write the log entry as a single write() to a | |
752 | file opened for appending, in order to avoid interleaving of output from | |
753 | different processes. The log_buffer can be used exactly as for main log | |
754 | writing. */ | |
755 | ||
756 | if (logfile != NULL) | |
757 | { | |
758 | int log_fd = Uopen(logfile, O_WRONLY|O_APPEND|O_CREAT, ob->mode); | |
759 | if (log_fd >= 0) | |
760 | { | |
761 | uschar *ptr = log_buffer; | |
762 | DEBUG(D_transport) debug_printf("logging message details\n"); | |
763 | sprintf(CS ptr, "%s\n", tod_stamp(tod_log)); | |
764 | while(*ptr) ptr++; | |
765 | if (from != NULL) | |
766 | { | |
767 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
768 | " From: %s\n", from); | |
769 | while(*ptr) ptr++; | |
770 | } | |
771 | if (to != NULL) | |
772 | { | |
773 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
774 | " To: %s\n", to); | |
775 | while(*ptr) ptr++; | |
776 | } | |
777 | if (cc != NULL) | |
778 | { | |
779 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
780 | " Cc: %s\n", cc); | |
781 | while(*ptr) ptr++; | |
782 | } | |
783 | if (bcc != NULL) | |
784 | { | |
785 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
786 | " Bcc: %s\n", bcc); | |
787 | while(*ptr) ptr++; | |
788 | } | |
789 | if (subject != NULL) | |
790 | { | |
791 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
792 | " Subject: %s\n", subject); | |
793 | while(*ptr) ptr++; | |
794 | } | |
795 | if (headers != NULL) | |
796 | { | |
797 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
798 | " %s\n", headers); | |
799 | while(*ptr) ptr++; | |
800 | } | |
801 | write(log_fd, log_buffer, ptr - log_buffer); | |
802 | close(log_fd); | |
803 | } | |
804 | else DEBUG(D_transport) debug_printf("Failed to open log file %s for %s " | |
805 | "transport: %s\n", logfile, tblock->name, strerror(errno)); | |
806 | } | |
807 | ||
808 | END_OFF: | |
809 | if (dbm_file != NULL) EXIM_DBCLOSE(dbm_file); | |
810 | if (cache_fd > 0) close(cache_fd); | |
811 | ||
812 | DEBUG(D_transport) debug_printf("%s transport succeeded\n", tblock->name); | |
813 | ||
814 | return FALSE; | |
815 | } | |
816 | ||
817 | /* End of transport/autoreply.c */ |