Commit | Line | Data |
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0756eb3c PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
f9ba5e22 | 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
0756eb3c PH |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | ||
9 | #include "../exim.h" | |
10 | #include "autoreply.h" | |
11 | ||
12 | ||
13 | ||
14 | /* Options specific to the autoreply transport. They must be in alphabetic | |
15 | order (note that "_" comes before the lower case letters). Those starting | |
16 | with "*" are not settable by the user but are used by the option-reading | |
17 | software for alternative value types. Some options are publicly visible and so | |
18 | are stored in the driver instance block. These are flagged with opt_public. */ | |
19 | ||
20 | optionlist autoreply_transport_options[] = { | |
21 | { "bcc", opt_stringptr, | |
22 | (void *)offsetof(autoreply_transport_options_block, bcc) }, | |
23 | { "cc", opt_stringptr, | |
24 | (void *)offsetof(autoreply_transport_options_block, cc) }, | |
25 | { "file", opt_stringptr, | |
26 | (void *)offsetof(autoreply_transport_options_block, file) }, | |
27 | { "file_expand", opt_bool, | |
28 | (void *)offsetof(autoreply_transport_options_block, file_expand) }, | |
29 | { "file_optional", opt_bool, | |
30 | (void *)offsetof(autoreply_transport_options_block, file_optional) }, | |
31 | { "from", opt_stringptr, | |
32 | (void *)offsetof(autoreply_transport_options_block, from) }, | |
33 | { "headers", opt_stringptr, | |
34 | (void *)offsetof(autoreply_transport_options_block, headers) }, | |
35 | { "log", opt_stringptr, | |
36 | (void *)offsetof(autoreply_transport_options_block, logfile) }, | |
37 | { "mode", opt_octint, | |
38 | (void *)offsetof(autoreply_transport_options_block, mode) }, | |
39 | { "never_mail", opt_stringptr, | |
40 | (void *)offsetof(autoreply_transport_options_block, never_mail) }, | |
41 | { "once", opt_stringptr, | |
42 | (void *)offsetof(autoreply_transport_options_block, oncelog) }, | |
43 | { "once_file_size", opt_int, | |
44 | (void *)offsetof(autoreply_transport_options_block, once_file_size) }, | |
45 | { "once_repeat", opt_stringptr, | |
46 | (void *)offsetof(autoreply_transport_options_block, once_repeat) }, | |
47 | { "reply_to", opt_stringptr, | |
48 | (void *)offsetof(autoreply_transport_options_block, reply_to) }, | |
49 | { "return_message", opt_bool, | |
50 | (void *)offsetof(autoreply_transport_options_block, return_message) }, | |
51 | { "subject", opt_stringptr, | |
52 | (void *)offsetof(autoreply_transport_options_block, subject) }, | |
53 | { "text", opt_stringptr, | |
54 | (void *)offsetof(autoreply_transport_options_block, text) }, | |
55 | { "to", opt_stringptr, | |
56 | (void *)offsetof(autoreply_transport_options_block, to) }, | |
57 | }; | |
58 | ||
59 | /* Size of the options list. An extern variable has to be used so that its | |
60 | address can appear in the tables drtables.c. */ | |
61 | ||
62 | int autoreply_transport_options_count = | |
63 | sizeof(autoreply_transport_options)/sizeof(optionlist); | |
64 | ||
d185889f JH |
65 | |
66 | #ifdef MACRO_PREDEF | |
67 | ||
68 | /* Dummy values */ | |
69 | autoreply_transport_options_block autoreply_transport_option_defaults = {0}; | |
70 | void autoreply_transport_init(transport_instance *tblock) {} | |
71 | BOOL autoreply_transport_entry(transport_instance *tblock, address_item *addr) {return FALSE;} | |
72 | ||
73 | #else /*!MACRO_PREDEF*/ | |
74 | ||
75 | ||
0756eb3c PH |
76 | /* Default private options block for the autoreply transport. */ |
77 | ||
78 | autoreply_transport_options_block autoreply_transport_option_defaults = { | |
79 | NULL, /* from */ | |
80 | NULL, /* reply_to */ | |
81 | NULL, /* to */ | |
82 | NULL, /* cc */ | |
83 | NULL, /* bcc */ | |
84 | NULL, /* subject */ | |
85 | NULL, /* headers */ | |
86 | NULL, /* text */ | |
87 | NULL, /* file */ | |
88 | NULL, /* logfile */ | |
89 | NULL, /* oncelog */ | |
90 | NULL, /* once_repeat */ | |
91 | NULL, /* never_mail */ | |
92 | 0600, /* mode */ | |
93 | 0, /* once_file_size */ | |
94 | FALSE, /* file_expand */ | |
95 | FALSE, /* file_optional */ | |
96 | FALSE /* return message */ | |
97 | }; | |
98 | ||
99 | ||
100 | ||
101 | /* Type of text for the checkexpand() function */ | |
102 | ||
103 | enum { cke_text, cke_hdr, cke_file }; | |
104 | ||
105 | ||
106 | ||
107 | /************************************************* | |
108 | * Initialization entry point * | |
109 | *************************************************/ | |
110 | ||
111 | /* Called for each instance, after its options have been read, to | |
112 | enable consistency checks to be done, or anything else that needs | |
113 | to be set up. */ | |
114 | ||
115 | void | |
116 | autoreply_transport_init(transport_instance *tblock) | |
117 | { | |
118 | /* | |
119 | autoreply_transport_options_block *ob = | |
120 | (autoreply_transport_options_block *)(tblock->options_block); | |
121 | */ | |
122 | ||
123 | /* If a fixed uid field is set, then a gid field must also be set. */ | |
124 | ||
125 | if (tblock->uid_set && !tblock->gid_set && tblock->expand_gid == NULL) | |
126 | log_write(0, LOG_PANIC_DIE|LOG_CONFIG, | |
127 | "user set without group for the %s transport", tblock->name); | |
128 | } | |
129 | ||
130 | ||
131 | ||
132 | ||
133 | /************************************************* | |
134 | * Expand string and check * | |
135 | *************************************************/ | |
136 | ||
137 | /* If the expansion fails, the error is set up in the address. Expanded | |
138 | strings must be checked to ensure they contain only printing characters | |
139 | and white space. If not, the function fails. | |
140 | ||
141 | Arguments: | |
142 | s string to expand | |
143 | addr address that is being worked on | |
144 | name transport name, for error text | |
145 | type type, for checking content: | |
146 | cke_text => no check | |
147 | cke_hdr => header, allow \n + whitespace | |
148 | cke_file => file name, no non-printers allowed | |
149 | ||
150 | Returns: expanded string if expansion succeeds; | |
151 | NULL otherwise | |
152 | */ | |
153 | ||
154 | static uschar * | |
155 | checkexpand(uschar *s, address_item *addr, uschar *name, int type) | |
156 | { | |
157 | uschar *t; | |
158 | uschar *ss = expand_string(s); | |
159 | ||
160 | if (ss == NULL) | |
161 | { | |
162 | addr->transport_return = FAIL; | |
163 | addr->message = string_sprintf("Expansion of \"%s\" failed in %s transport: " | |
164 | "%s", s, name, expand_string_message); | |
165 | return NULL; | |
166 | } | |
167 | ||
168 | if (type != cke_text) for (t = ss; *t != 0; t++) | |
169 | { | |
170 | int c = *t; | |
55414b25 | 171 | const uschar * sp; |
0756eb3c PH |
172 | if (mac_isprint(c)) continue; |
173 | if (type == cke_hdr && c == '\n' && (t[1] == ' ' || t[1] == '\t')) continue; | |
55414b25 | 174 | sp = string_printing(s); |
0756eb3c PH |
175 | addr->transport_return = FAIL; |
176 | addr->message = string_sprintf("Expansion of \"%s\" in %s transport " | |
55414b25 | 177 | "contains non-printing character %d", sp, name, c); |
0756eb3c PH |
178 | return NULL; |
179 | } | |
180 | ||
181 | return ss; | |
182 | } | |
183 | ||
184 | ||
185 | ||
186 | ||
187 | /************************************************* | |
188 | * Check a header line for never_mail * | |
189 | *************************************************/ | |
190 | ||
191 | /* This is called to check to, cc, and bcc for addresses in the never_mail | |
192 | list. Any that are found are removed. | |
193 | ||
194 | Arguments: | |
195 | listptr points to the list of addresses | |
196 | never_mail an address list, already expanded | |
197 | ||
198 | Returns: nothing | |
199 | */ | |
200 | ||
201 | static void | |
55414b25 | 202 | check_never_mail(uschar **listptr, const uschar *never_mail) |
0756eb3c PH |
203 | { |
204 | uschar *s = *listptr; | |
205 | ||
206 | while (*s != 0) | |
207 | { | |
208 | uschar *error, *next; | |
209 | uschar *e = parse_find_address_end(s, FALSE); | |
210 | int terminator = *e; | |
211 | int start, end, domain, rc; | |
212 | ||
213 | /* Temporarily terminate the string at the address end while extracting | |
214 | the operative address within. */ | |
215 | ||
216 | *e = 0; | |
217 | next = parse_extract_address(s, &error, &start, &end, &domain, FALSE); | |
218 | *e = terminator; | |
219 | ||
220 | /* If there is some kind of syntax error, just give up on this header | |
221 | line. */ | |
222 | ||
223 | if (next == NULL) break; | |
224 | ||
225 | /* See if the address is on the never_mail list */ | |
226 | ||
227 | rc = match_address_list(next, /* address to check */ | |
228 | TRUE, /* start caseless */ | |
229 | FALSE, /* don't expand the list */ | |
230 | &never_mail, /* the list */ | |
231 | NULL, /* no caching */ | |
232 | -1, /* no expand setup */ | |
233 | 0, /* separator from list */ | |
234 | NULL); /* no lookup value return */ | |
235 | ||
236 | if (rc == OK) /* Remove this address */ | |
237 | { | |
238 | DEBUG(D_transport) | |
239 | debug_printf("discarding recipient %s (matched never_mail)\n", next); | |
240 | if (terminator == ',') e++; | |
241 | memmove(s, e, Ustrlen(e) + 1); | |
242 | } | |
243 | else /* Skip over this address */ | |
244 | { | |
245 | s = e; | |
246 | if (terminator == ',') s++; | |
247 | } | |
248 | } | |
249 | ||
250 | /* Check to see if we removed the last address, leaving a terminating comma | |
251 | that needs to be removed */ | |
252 | ||
253 | s = *listptr + Ustrlen(*listptr); | |
254 | while (s > *listptr && (isspace(s[-1]) || s[-1] == ',')) s--; | |
255 | *s = 0; | |
256 | ||
257 | /* Check to see if there any addresses left; if not, set NULL */ | |
258 | ||
259 | s = *listptr; | |
260 | while (s != 0 && isspace(*s)) s++; | |
261 | if (*s == 0) *listptr = NULL; | |
262 | } | |
263 | ||
264 | ||
265 | ||
266 | /************************************************* | |
267 | * Main entry point * | |
268 | *************************************************/ | |
269 | ||
270 | /* See local README for interface details. This transport always returns | |
271 | FALSE, indicating that the top address has the status for all - though in fact | |
272 | this transport can handle only one address at at time anyway. */ | |
273 | ||
274 | BOOL | |
275 | autoreply_transport_entry( | |
276 | transport_instance *tblock, /* data for this instantiation */ | |
277 | address_item *addr) /* address we are working on */ | |
278 | { | |
279 | int fd, pid, rc; | |
280 | int cache_fd = -1; | |
0756eb3c PH |
281 | int cache_size = 0; |
282 | int add_size = 0; | |
283 | EXIM_DB *dbm_file = NULL; | |
284 | BOOL file_expand, return_message; | |
285 | uschar *from, *reply_to, *to, *cc, *bcc, *subject, *headers, *text, *file; | |
286 | uschar *logfile, *oncelog; | |
287 | uschar *cache_buff = NULL; | |
288 | uschar *cache_time = NULL; | |
30dba1e6 | 289 | uschar *message_id = NULL; |
0756eb3c PH |
290 | header_line *h; |
291 | time_t now = time(NULL); | |
292 | time_t once_repeat_sec = 0; | |
293 | FILE *f; | |
294 | FILE *ff = NULL; | |
295 | ||
296 | autoreply_transport_options_block *ob = | |
297 | (autoreply_transport_options_block *)(tblock->options_block); | |
298 | ||
299 | DEBUG(D_transport) debug_printf("%s transport entered\n", tblock->name); | |
300 | ||
301 | /* Set up for the good case */ | |
302 | ||
303 | addr->transport_return = OK; | |
304 | addr->basic_errno = 0; | |
305 | ||
306 | /* If the address is pointing to a reply block, then take all the data | |
307 | from that block. It has typically been set up by a mail filter processing | |
308 | router. Otherwise, the data must be supplied by this transport, and | |
309 | it has to be expanded here. */ | |
310 | ||
311 | if (addr->reply != NULL) | |
312 | { | |
313 | DEBUG(D_transport) debug_printf("taking data from address\n"); | |
314 | from = addr->reply->from; | |
315 | reply_to = addr->reply->reply_to; | |
316 | to = addr->reply->to; | |
317 | cc = addr->reply->cc; | |
318 | bcc = addr->reply->bcc; | |
319 | subject = addr->reply->subject; | |
320 | headers = addr->reply->headers; | |
321 | text = addr->reply->text; | |
322 | file = addr->reply->file; | |
323 | logfile = addr->reply->logfile; | |
324 | oncelog = addr->reply->oncelog; | |
325 | once_repeat_sec = addr->reply->once_repeat; | |
326 | file_expand = addr->reply->file_expand; | |
327 | expand_forbid = addr->reply->expand_forbid; | |
328 | return_message = addr->reply->return_message; | |
329 | } | |
330 | else | |
331 | { | |
332 | uschar *oncerepeat = ob->once_repeat; | |
333 | ||
334 | DEBUG(D_transport) debug_printf("taking data from transport\n"); | |
335 | from = ob->from; | |
336 | reply_to = ob->reply_to; | |
337 | to = ob->to; | |
338 | cc = ob->cc; | |
339 | bcc = ob->bcc; | |
340 | subject = ob->subject; | |
341 | headers = ob->headers; | |
342 | text = ob->text; | |
343 | file = ob->file; | |
344 | logfile = ob->logfile; | |
345 | oncelog = ob->oncelog; | |
346 | file_expand = ob->file_expand; | |
347 | return_message = ob->return_message; | |
348 | ||
0a6c178c JH |
349 | if ( from && !(from = checkexpand(from, addr, tblock->name, cke_hdr)) |
350 | || reply_to && !(reply_to = checkexpand(reply_to, addr, tblock->name, cke_hdr)) | |
351 | || to && !(to = checkexpand(to, addr, tblock->name, cke_hdr)) | |
352 | || cc && !(cc = checkexpand(cc, addr, tblock->name, cke_hdr)) | |
353 | || bcc && !(bcc = checkexpand(bcc, addr, tblock->name, cke_hdr)) | |
354 | || subject && !(subject = checkexpand(subject, addr, tblock->name, cke_hdr)) | |
355 | || headers && !(headers = checkexpand(headers, addr, tblock->name, cke_text)) | |
356 | || text && !(text = checkexpand(text, addr, tblock->name, cke_text)) | |
357 | || file && !(file = checkexpand(file, addr, tblock->name, cke_file)) | |
358 | || logfile && !(logfile = checkexpand(logfile, addr, tblock->name, cke_file)) | |
359 | || oncelog && !(oncelog = checkexpand(oncelog, addr, tblock->name, cke_file)) | |
360 | || oncerepeat && !(oncerepeat = checkexpand(oncerepeat, addr, tblock->name, cke_file)) | |
361 | ) | |
0756eb3c PH |
362 | return FALSE; |
363 | ||
0a6c178c | 364 | if (oncerepeat) |
0756eb3c PH |
365 | { |
366 | once_repeat_sec = readconf_readtime(oncerepeat, 0, FALSE); | |
367 | if (once_repeat_sec < 0) | |
368 | { | |
369 | addr->transport_return = FAIL; | |
370 | addr->message = string_sprintf("Invalid time value \"%s\" for " | |
371 | "\"once_repeat\" in %s transport", oncerepeat, tblock->name); | |
372 | return FALSE; | |
373 | } | |
374 | } | |
375 | } | |
376 | ||
377 | /* If the never_mail option is set, we have to scan all the recipients and | |
378 | remove those that match. */ | |
379 | ||
0a6c178c | 380 | if (ob->never_mail) |
0756eb3c | 381 | { |
55414b25 | 382 | const uschar *never_mail = expand_string(ob->never_mail); |
0756eb3c | 383 | |
0a6c178c | 384 | if (!never_mail) |
0756eb3c PH |
385 | { |
386 | addr->transport_return = FAIL; | |
387 | addr->message = string_sprintf("Failed to expand \"%s\" for " | |
388 | "\"never_mail\" in %s transport", ob->never_mail, tblock->name); | |
389 | return FALSE; | |
390 | } | |
391 | ||
0a6c178c JH |
392 | if (to) check_never_mail(&to, never_mail); |
393 | if (cc) check_never_mail(&cc, never_mail); | |
394 | if (bcc) check_never_mail(&bcc, never_mail); | |
0756eb3c | 395 | |
0a6c178c | 396 | if (!to && !cc && !bcc) |
0756eb3c PH |
397 | { |
398 | DEBUG(D_transport) | |
399 | debug_printf("*** all recipients removed by never_mail\n"); | |
400 | return OK; | |
401 | } | |
402 | } | |
403 | ||
404 | /* If the -N option is set, can't do any more. */ | |
405 | ||
406 | if (dont_deliver) | |
407 | { | |
408 | DEBUG(D_transport) | |
409 | debug_printf("*** delivery by %s transport bypassed by -N option\n", | |
410 | tblock->name); | |
411 | return FALSE; | |
412 | } | |
413 | ||
414 | ||
415 | /* If the oncelog field is set, we send want to send only one message to the | |
416 | given recipient(s). This works only on the "To" field. If there is no "To" | |
417 | field, the message is always sent. If the To: field contains more than one | |
418 | recipient, the effect might not be quite as envisaged. If once_file_size is | |
419 | set, instead of a dbm file, we use a regular file containing a circular buffer | |
420 | recipient cache. */ | |
421 | ||
0a6c178c | 422 | if (oncelog && *oncelog != 0 && to) |
0756eb3c PH |
423 | { |
424 | time_t then = 0; | |
425 | ||
426 | /* Handle fixed-size cache file. */ | |
427 | ||
428 | if (ob->once_file_size > 0) | |
429 | { | |
0a6c178c | 430 | uschar * p, * nextp; |
0756eb3c PH |
431 | struct stat statbuf; |
432 | cache_fd = Uopen(oncelog, O_CREAT|O_RDWR, ob->mode); | |
433 | ||
434 | if (cache_fd < 0 || fstat(cache_fd, &statbuf) != 0) | |
435 | { | |
436 | addr->transport_return = DEFER; | |
437 | addr->message = string_sprintf("Failed to %s \"once\" file %s when " | |
438 | "sending message from %s transport: %s", | |
439 | (cache_fd < 0)? "open" : "stat", oncelog, tblock->name, | |
440 | strerror(errno)); | |
441 | goto END_OFF; | |
442 | } | |
443 | ||
444 | /* Get store in the temporary pool and read the entire file into it. We get | |
445 | an amount of store that is big enough to add the new entry on the end if we | |
446 | need to do that. */ | |
447 | ||
448 | cache_size = statbuf.st_size; | |
449 | add_size = sizeof(time_t) + Ustrlen(to) + 1; | |
450 | cache_buff = store_get(cache_size + add_size); | |
451 | ||
452 | if (read(cache_fd, cache_buff, cache_size) != cache_size) | |
453 | { | |
454 | addr->transport_return = DEFER; | |
455 | addr->basic_errno = errno; | |
456 | addr->message = US"error while reading \"once\" file"; | |
457 | goto END_OFF; | |
458 | } | |
459 | ||
460 | DEBUG(D_transport) debug_printf("%d bytes read from %s\n", cache_size, oncelog); | |
461 | ||
462 | /* Scan the data for this recipient. Each entry in the file starts with | |
463 | a time_t sized time value, followed by the address, followed by a binary | |
464 | zero. If we find a match, put the time into "then", and the place where it | |
465 | was found into "cache_time". Otherwise, "then" is left at zero. */ | |
466 | ||
0a6c178c | 467 | for (p = cache_buff; p < cache_buff + cache_size; p = nextp) |
0756eb3c PH |
468 | { |
469 | uschar *s = p + sizeof(time_t); | |
0a6c178c | 470 | nextp = s + Ustrlen(s) + 1; |
0756eb3c PH |
471 | if (Ustrcmp(to, s) == 0) |
472 | { | |
473 | memcpy(&then, p, sizeof(time_t)); | |
474 | cache_time = p; | |
475 | break; | |
476 | } | |
0756eb3c PH |
477 | } |
478 | } | |
479 | ||
480 | /* Use a DBM file for the list of previous recipients. */ | |
481 | ||
482 | else | |
483 | { | |
484 | EXIM_DATUM key_datum, result_datum; | |
cfb9cf20 JH |
485 | uschar * dirname = string_copy(oncelog); |
486 | uschar * s; | |
487 | ||
488 | if ((s = Ustrrchr(dirname, '/'))) *s = '\0'; | |
489 | EXIM_DBOPEN(oncelog, dirname, O_RDWR|O_CREAT, ob->mode, &dbm_file); | |
d315eda1 | 490 | if (!dbm_file) |
0756eb3c PH |
491 | { |
492 | addr->transport_return = DEFER; | |
493 | addr->message = string_sprintf("Failed to open %s file %s when sending " | |
494 | "message from %s transport: %s", EXIM_DBTYPE, oncelog, tblock->name, | |
495 | strerror(errno)); | |
496 | goto END_OFF; | |
497 | } | |
498 | ||
499 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries need datums */ | |
500 | EXIM_DATUM_INIT(result_datum); /* to be cleared */ | |
501 | EXIM_DATUM_DATA(key_datum) = CS to; | |
502 | EXIM_DATUM_SIZE(key_datum) = Ustrlen(to) + 1; | |
503 | ||
504 | if (EXIM_DBGET(dbm_file, key_datum, result_datum)) | |
505 | { | |
506 | /* If the datum size is that of a binary time, we are in the new world | |
507 | where messages are sent periodically. Otherwise the file is an old one, | |
508 | where the datum was filled with a tod_log time, which is assumed to be | |
509 | different in size. For that, only one message is ever sent. This change | |
510 | introduced at Exim 3.00. In a couple of years' time the test on the size | |
511 | can be abolished. */ | |
512 | ||
513 | if (EXIM_DATUM_SIZE(result_datum) == sizeof(time_t)) | |
0756eb3c | 514 | memcpy(&then, EXIM_DATUM_DATA(result_datum), sizeof(time_t)); |
0a6c178c JH |
515 | else |
516 | then = now; | |
0756eb3c PH |
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 | { | |
13559da6 | 525 | int log_fd; |
0756eb3c PH |
526 | DEBUG(D_transport) debug_printf("message previously sent to %s%s\n", to, |
527 | (once_repeat_sec > 0)? " and repeat time not reached" : ""); | |
13559da6 | 528 | log_fd = logfile ? Uopen(logfile, O_WRONLY|O_APPEND|O_CREAT, ob->mode) : -1; |
0756eb3c PH |
529 | if (log_fd >= 0) |
530 | { | |
531 | uschar *ptr = log_buffer; | |
532 | sprintf(CS ptr, "%s\n previously sent to %.200s\n", tod_stamp(tod_log), to); | |
533 | while(*ptr) ptr++; | |
1ac6b2e7 JH |
534 | if(write(log_fd, log_buffer, ptr - log_buffer) != ptr-log_buffer |
535 | || close(log_fd)) | |
536 | DEBUG(D_transport) debug_printf("Problem writing log file %s for %s " | |
537 | "transport\n", logfile, tblock->name); | |
0756eb3c PH |
538 | } |
539 | goto END_OFF; | |
540 | } | |
541 | ||
542 | DEBUG(D_transport) debug_printf("%s %s\n", (then <= 0)? | |
543 | "no previous message sent to" : "repeat time reached for", to); | |
544 | } | |
545 | ||
546 | /* We are going to send a message. Ensure any requested file is available. */ | |
547 | ||
0a6c178c | 548 | if (file) |
0756eb3c PH |
549 | { |
550 | ff = Ufopen(file, "rb"); | |
0a6c178c | 551 | if (!ff && !ob->file_optional) |
0756eb3c PH |
552 | { |
553 | addr->transport_return = DEFER; | |
554 | addr->message = string_sprintf("Failed to open file %s when sending " | |
555 | "message from %s transport: %s", file, tblock->name, strerror(errno)); | |
556 | return FALSE; | |
557 | } | |
558 | } | |
559 | ||
560 | /* Make a subprocess to send the message */ | |
561 | ||
562 | pid = child_open_exim(&fd); | |
563 | ||
564 | /* Creation of child failed; defer this delivery. */ | |
565 | ||
566 | if (pid < 0) | |
567 | { | |
568 | addr->transport_return = DEFER; | |
569 | addr->message = string_sprintf("Failed to create child process to send " | |
570 | "message from %s transport: %s", tblock->name, strerror(errno)); | |
571 | DEBUG(D_transport) debug_printf("%s\n", addr->message); | |
0a6c178c | 572 | if (dbm_file) EXIM_DBCLOSE(dbm_file); |
0756eb3c PH |
573 | return FALSE; |
574 | } | |
575 | ||
576 | /* Create the message to be sent - recipients are taken from the headers, | |
577 | as the -t option is used. The "headers" stuff *must* be last in case there | |
578 | are newlines in it which might, if placed earlier, screw up other headers. */ | |
579 | ||
580 | f = fdopen(fd, "wb"); | |
581 | ||
0a6c178c JH |
582 | if (from) fprintf(f, "From: %s\n", from); |
583 | if (reply_to) fprintf(f, "Reply-To: %s\n", reply_to); | |
584 | if (to) fprintf(f, "To: %s\n", to); | |
585 | if (cc) fprintf(f, "Cc: %s\n", cc); | |
586 | if (bcc) fprintf(f, "Bcc: %s\n", bcc); | |
587 | if (subject) fprintf(f, "Subject: %s\n", subject); | |
0756eb3c PH |
588 | |
589 | /* Generate In-Reply-To from the message_id header; there should | |
590 | always be one, but code defensively. */ | |
591 | ||
0a6c178c | 592 | for (h = header_list; h; h = h->next) |
0756eb3c PH |
593 | if (h->type == htype_id) break; |
594 | ||
0a6c178c | 595 | if (h) |
0756eb3c | 596 | { |
30dba1e6 PH |
597 | message_id = Ustrchr(h->text, ':') + 1; |
598 | while (isspace(*message_id)) message_id++; | |
599 | fprintf(f, "In-Reply-To: %s", message_id); | |
600 | } | |
601 | ||
602 | /* Generate a References header if there is at least one of Message-ID:, | |
603 | References:, or In-Reply-To: (see RFC 2822). */ | |
604 | ||
0a6c178c | 605 | for (h = header_list; h; h = h->next) |
30dba1e6 PH |
606 | if (h->type != htype_old && strncmpic(US"References:", h->text, 11) == 0) |
607 | break; | |
608 | ||
0a6c178c JH |
609 | if (!h) |
610 | for (h = header_list; h; h = h->next) | |
30dba1e6 PH |
611 | if (h->type != htype_old && strncmpic(US"In-Reply-To:", h->text, 12) == 0) |
612 | break; | |
613 | ||
614 | /* We limit the total length of references. Although there is no fixed | |
615 | limit, some systems do not like headers growing beyond recognition. | |
616 | Keep the first message ID for the thread root and the last few for | |
617 | the position inside the thread, up to a maximum of 12 altogether. */ | |
618 | ||
0a6c178c | 619 | if (h || message_id) |
30dba1e6 PH |
620 | { |
621 | fprintf(f, "References:"); | |
0a6c178c | 622 | if (h) |
30dba1e6 PH |
623 | { |
624 | uschar *s, *id, *error; | |
625 | uschar *referenced_ids[12]; | |
626 | int reference_count = 0; | |
627 | int i; | |
628 | ||
629 | s = Ustrchr(h->text, ':') + 1; | |
630 | parse_allow_group = FALSE; | |
631 | while (*s != 0 && (s = parse_message_id(s, &id, &error)) != NULL) | |
632 | { | |
5903c6ff | 633 | if (reference_count == nelem(referenced_ids)) |
30dba1e6 PH |
634 | { |
635 | memmove(referenced_ids + 1, referenced_ids + 2, | |
636 | sizeof(referenced_ids) - 2*sizeof(uschar *)); | |
637 | referenced_ids[reference_count - 1] = id; | |
638 | } | |
639 | else referenced_ids[reference_count++] = id; | |
640 | } | |
641 | for (i = 0; i < reference_count; ++i) fprintf(f, " %s", referenced_ids[i]); | |
642 | } | |
643 | ||
644 | /* The message id will have a newline on the end of it. */ | |
645 | ||
0a6c178c JH |
646 | if (message_id) fprintf(f, " %s", message_id); |
647 | else fprintf(f, "\n"); | |
0756eb3c PH |
648 | } |
649 | ||
650 | /* Add an Auto-Submitted: header */ | |
651 | ||
652 | fprintf(f, "Auto-Submitted: auto-replied\n"); | |
653 | ||
654 | /* Add any specially requested headers */ | |
655 | ||
0a6c178c | 656 | if (headers) fprintf(f, "%s\n", headers); |
0756eb3c PH |
657 | fprintf(f, "\n"); |
658 | ||
0a6c178c | 659 | if (text) |
0756eb3c PH |
660 | { |
661 | fprintf(f, "%s", CS text); | |
662 | if (text[Ustrlen(text)-1] != '\n') fprintf(f, "\n"); | |
663 | } | |
664 | ||
0a6c178c | 665 | if (ff) |
0756eb3c PH |
666 | { |
667 | while (Ufgets(big_buffer, big_buffer_size, ff) != NULL) | |
668 | { | |
669 | if (file_expand) | |
670 | { | |
671 | uschar *s = expand_string(big_buffer); | |
672 | DEBUG(D_transport) | |
673 | { | |
0a6c178c | 674 | if (!s) |
0756eb3c PH |
675 | debug_printf("error while expanding line from file:\n %s\n %s\n", |
676 | big_buffer, expand_string_message); | |
677 | } | |
0a6c178c | 678 | fprintf(f, "%s", s ? CS s : CS big_buffer); |
0756eb3c PH |
679 | } |
680 | else fprintf(f, "%s", CS big_buffer); | |
681 | } | |
e0eb00cd | 682 | (void) fclose(ff); |
0756eb3c PH |
683 | } |
684 | ||
685 | /* Copy the original message if required, observing the return size | |
9f526266 | 686 | limit if we are returning the body. */ |
0756eb3c PH |
687 | |
688 | if (return_message) | |
689 | { | |
9f526266 PH |
690 | uschar *rubric = (tblock->headers_only)? |
691 | US"------ This is a copy of the message's header lines.\n" | |
692 | : (tblock->body_only)? | |
693 | US"------ This is a copy of the body of the message, without the headers.\n" | |
694 | : | |
695 | US"------ This is a copy of the message, including all the headers.\n"; | |
65de12cc | 696 | transport_ctx tctx = { |
b3b37076 JH |
697 | .u = {.fd = fileno(f)}, |
698 | .tblock = tblock, | |
699 | .addr = addr, | |
700 | .check_string = NULL, | |
701 | .escape_string = NULL, | |
702 | .options = (tblock->body_only ? topt_no_headers : 0) | |
703 | | (tblock->headers_only ? topt_no_body : 0) | |
704 | | (tblock->return_path_add ? topt_add_return_path : 0) | |
705 | | (tblock->delivery_date_add ? topt_add_delivery_date : 0) | |
706 | | (tblock->envelope_to_add ? topt_add_envelope_to : 0) | |
707 | | topt_not_socket | |
65de12cc | 708 | }; |
9f526266 PH |
709 | |
710 | if (bounce_return_size_limit > 0 && !tblock->headers_only) | |
0756eb3c PH |
711 | { |
712 | struct stat statbuf; | |
713 | int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) * | |
714 | DELIVER_IN_BUFFER_SIZE; | |
715 | if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max) | |
716 | { | |
9f526266 | 717 | fprintf(f, "\n%s" |
b1c749bb | 718 | "------ The body of the message is " OFF_T_FMT " characters long; only the first\n" |
9f526266 | 719 | "------ %d or so are included here.\n\n", rubric, statbuf.st_size, |
0d7eb84a | 720 | (max/1000)*1000); |
0756eb3c | 721 | } |
9f526266 | 722 | else fprintf(f, "\n%s\n", rubric); |
0756eb3c | 723 | } |
9f526266 | 724 | else fprintf(f, "\n%s\n", rubric); |
0756eb3c PH |
725 | |
726 | fflush(f); | |
727 | transport_count = 0; | |
42055a33 | 728 | transport_write_message(&tctx, bounce_return_size_limit); |
0756eb3c PH |
729 | } |
730 | ||
731 | /* End the message and wait for the child process to end; no timeout. */ | |
732 | ||
f1e894f3 | 733 | (void)fclose(f); |
0756eb3c PH |
734 | rc = child_close(pid, 0); |
735 | ||
736 | /* Update the "sent to" log whatever the yield. This errs on the side of | |
737 | missing out a message rather than risking sending more than one. We either have | |
738 | cache_fd set to a fixed size, circular buffer file, or dbm_file set to an open | |
739 | DBM file (or neither, if "once" is not set). */ | |
740 | ||
741 | /* Update fixed-size cache file. If cache_time is set, we found a previous | |
742 | entry; that is the spot into which to put the current time. Otherwise we have | |
743 | to add a new record; remove the first one in the file if the file is too big. | |
744 | We always rewrite the entire file in a single write operation. This is | |
745 | (hopefully) going to be the safest thing because there is no interlocking | |
746 | between multiple simultaneous deliveries. */ | |
747 | ||
748 | if (cache_fd >= 0) | |
749 | { | |
750 | uschar *from = cache_buff; | |
751 | int size = cache_size; | |
0756eb3c | 752 | |
d315eda1 | 753 | if (lseek(cache_fd, 0, SEEK_SET) == 0) |
0756eb3c | 754 | { |
d315eda1 | 755 | if (!cache_time) |
0756eb3c | 756 | { |
d315eda1 JH |
757 | cache_time = from + size; |
758 | memcpy(cache_time + sizeof(time_t), to, add_size - sizeof(time_t)); | |
759 | size += add_size; | |
760 | ||
761 | if (cache_size > 0 && size > ob->once_file_size) | |
762 | { | |
763 | from += sizeof(time_t) + Ustrlen(from + sizeof(time_t)) + 1; | |
764 | size -= (from - cache_buff); | |
765 | } | |
0756eb3c | 766 | } |
0756eb3c | 767 | |
d315eda1 JH |
768 | memcpy(cache_time, &now, sizeof(time_t)); |
769 | if(write(cache_fd, from, size) != size) | |
770 | DEBUG(D_transport) debug_printf("Problem writing cache file %s for %s " | |
771 | "transport\n", oncelog, tblock->name); | |
772 | } | |
0756eb3c PH |
773 | } |
774 | ||
775 | /* Update DBM file */ | |
776 | ||
d315eda1 | 777 | else if (dbm_file) |
0756eb3c PH |
778 | { |
779 | EXIM_DATUM key_datum, value_datum; | |
780 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries need to have */ | |
781 | EXIM_DATUM_INIT(value_datum); /* cleared datums. */ | |
782 | EXIM_DATUM_DATA(key_datum) = CS to; | |
783 | EXIM_DATUM_SIZE(key_datum) = Ustrlen(to) + 1; | |
784 | ||
785 | /* Many OS define the datum value, sensibly, as a void *. However, there | |
786 | are some which still have char *. By casting this address to a char * we | |
787 | can avoid warning messages from the char * systems. */ | |
788 | ||
789 | EXIM_DATUM_DATA(value_datum) = CS (&now); | |
790 | EXIM_DATUM_SIZE(value_datum) = (int)sizeof(time_t); | |
791 | EXIM_DBPUT(dbm_file, key_datum, value_datum); | |
792 | } | |
793 | ||
794 | /* If sending failed, defer to try again - but if once is set the next | |
795 | try will skip, of course. However, if there were no recipients in the | |
796 | message, we do not fail. */ | |
797 | ||
798 | if (rc != 0) | |
0756eb3c PH |
799 | if (rc == EXIT_NORECIPIENTS) |
800 | { | |
801 | DEBUG(D_any) debug_printf("%s transport: message contained no recipients\n", | |
802 | tblock->name); | |
803 | } | |
804 | else | |
805 | { | |
806 | addr->transport_return = DEFER; | |
807 | addr->message = string_sprintf("Failed to send message from %s " | |
808 | "transport (%d)", tblock->name, rc); | |
809 | goto END_OFF; | |
810 | } | |
0756eb3c PH |
811 | |
812 | /* Log the sending of the message if successful and required. If the file | |
813 | fails to open, it's hard to know what to do. We cannot write to the Exim | |
814 | log from here, since we may be running under an unprivileged uid. We don't | |
815 | want to fail the delivery, since the message has been successfully sent. For | |
816 | the moment, ignore open failures. Write the log entry as a single write() to a | |
817 | file opened for appending, in order to avoid interleaving of output from | |
818 | different processes. The log_buffer can be used exactly as for main log | |
819 | writing. */ | |
820 | ||
0a6c178c | 821 | if (logfile) |
0756eb3c PH |
822 | { |
823 | int log_fd = Uopen(logfile, O_WRONLY|O_APPEND|O_CREAT, ob->mode); | |
824 | if (log_fd >= 0) | |
825 | { | |
826 | uschar *ptr = log_buffer; | |
827 | DEBUG(D_transport) debug_printf("logging message details\n"); | |
828 | sprintf(CS ptr, "%s\n", tod_stamp(tod_log)); | |
829 | while(*ptr) ptr++; | |
0a6c178c | 830 | if (from) |
0756eb3c PH |
831 | { |
832 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
833 | " From: %s\n", from); | |
834 | while(*ptr) ptr++; | |
835 | } | |
0a6c178c | 836 | if (to) |
0756eb3c PH |
837 | { |
838 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
839 | " To: %s\n", to); | |
840 | while(*ptr) ptr++; | |
841 | } | |
0a6c178c | 842 | if (cc) |
0756eb3c PH |
843 | { |
844 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
845 | " Cc: %s\n", cc); | |
846 | while(*ptr) ptr++; | |
847 | } | |
0a6c178c | 848 | if (bcc) |
0756eb3c PH |
849 | { |
850 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
851 | " Bcc: %s\n", bcc); | |
852 | while(*ptr) ptr++; | |
853 | } | |
0a6c178c | 854 | if (subject) |
0756eb3c PH |
855 | { |
856 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
857 | " Subject: %s\n", subject); | |
858 | while(*ptr) ptr++; | |
859 | } | |
0a6c178c | 860 | if (headers) |
0756eb3c PH |
861 | { |
862 | (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), | |
863 | " %s\n", headers); | |
864 | while(*ptr) ptr++; | |
865 | } | |
1ac6b2e7 JH |
866 | if(write(log_fd, log_buffer, ptr - log_buffer) != ptr-log_buffer |
867 | || close(log_fd)) | |
868 | DEBUG(D_transport) debug_printf("Problem writing log file %s for %s " | |
869 | "transport\n", logfile, tblock->name); | |
0756eb3c PH |
870 | } |
871 | else DEBUG(D_transport) debug_printf("Failed to open log file %s for %s " | |
872 | "transport: %s\n", logfile, tblock->name, strerror(errno)); | |
873 | } | |
874 | ||
875 | END_OFF: | |
d315eda1 | 876 | if (dbm_file) EXIM_DBCLOSE(dbm_file); |
f1e894f3 | 877 | if (cache_fd > 0) (void)close(cache_fd); |
0756eb3c PH |
878 | |
879 | DEBUG(D_transport) debug_printf("%s transport succeeded\n", tblock->name); | |
880 | ||
881 | return FALSE; | |
882 | } | |
883 | ||
d185889f | 884 | #endif /*!MACRO_PREDEF*/ |
0756eb3c | 885 | /* End of transport/autoreply.c */ |