tidying
[exim.git] / src / src / transports / autoreply.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
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
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
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;
171 const uschar * sp;
172 if (mac_isprint(c)) continue;
173 if (type == cke_hdr && c == '\n' && (t[1] == ' ' || t[1] == '\t')) continue;
174 sp = string_printing(s);
175 addr->transport_return = FAIL;
176 addr->message = string_sprintf("Expansion of \"%s\" in %s transport "
177 "contains non-printing character %d", sp, name, c);
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
202 check_never_mail(uschar **listptr, const uschar *never_mail)
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;
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;
289 uschar *message_id = NULL;
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
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 )
362 return FALSE;
363
364 if (oncerepeat)
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
380 if (ob->never_mail)
381 {
382 const uschar *never_mail = expand_string(ob->never_mail);
383
384 if (!never_mail)
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
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);
395
396 if (!to && !cc && !bcc)
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
422 if (oncelog && *oncelog != 0 && to)
423 {
424 time_t then = 0;
425
426 /* Handle fixed-size cache file. */
427
428 if (ob->once_file_size > 0)
429 {
430 uschar * p, * nextp;
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
467 for (p = cache_buff; p < cache_buff + cache_size; p = nextp)
468 {
469 uschar *s = p + sizeof(time_t);
470 nextp = s + Ustrlen(s) + 1;
471 if (Ustrcmp(to, s) == 0)
472 {
473 memcpy(&then, p, sizeof(time_t));
474 cache_time = p;
475 break;
476 }
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;
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);
490 if (!dbm_file)
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))
514 memcpy(&then, EXIM_DATUM_DATA(result_datum), sizeof(time_t));
515 else
516 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 int log_fd;
526 DEBUG(D_transport) debug_printf("message previously sent to %s%s\n", to,
527 (once_repeat_sec > 0)? " and repeat time not reached" : "");
528 log_fd = logfile ? Uopen(logfile, O_WRONLY|O_APPEND|O_CREAT, ob->mode) : -1;
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++;
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);
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
548 if (file)
549 {
550 ff = Ufopen(file, "rb");
551 if (!ff && !ob->file_optional)
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);
572 if (dbm_file) EXIM_DBCLOSE(dbm_file);
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
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);
588
589 /* Generate In-Reply-To from the message_id header; there should
590 always be one, but code defensively. */
591
592 for (h = header_list; h; h = h->next)
593 if (h->type == htype_id) break;
594
595 if (h)
596 {
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
605 for (h = header_list; h; h = h->next)
606 if (h->type != htype_old && strncmpic(US"References:", h->text, 11) == 0)
607 break;
608
609 if (!h)
610 for (h = header_list; h; h = h->next)
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
619 if (h || message_id)
620 {
621 fprintf(f, "References:");
622 if (h)
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 {
633 if (reference_count == sizeof(referenced_ids)/sizeof(uschar *))
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
646 if (message_id) fprintf(f, " %s", message_id);
647 else fprintf(f, "\n");
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
656 if (headers) fprintf(f, "%s\n", headers);
657 fprintf(f, "\n");
658
659 if (text)
660 {
661 fprintf(f, "%s", CS text);
662 if (text[Ustrlen(text)-1] != '\n') fprintf(f, "\n");
663 }
664
665 if (ff)
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 {
674 if (!s)
675 debug_printf("error while expanding line from file:\n %s\n %s\n",
676 big_buffer, expand_string_message);
677 }
678 fprintf(f, "%s", s ? CS s : CS big_buffer);
679 }
680 else fprintf(f, "%s", CS big_buffer);
681 }
682 (void) fclose(ff);
683 }
684
685 /* Copy the original message if required, observing the return size
686 limit if we are returning the body. */
687
688 if (return_message)
689 {
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";
696 transport_ctx tctx = {
697 {fileno(f)},
698 tblock,
699 addr,
700 NULL, NULL,
701 (tblock->body_only ? topt_no_headers : 0) |
702 (tblock->headers_only ? topt_no_body : 0) |
703 (tblock->return_path_add ? topt_add_return_path : 0) |
704 (tblock->delivery_date_add ? topt_add_delivery_date : 0) |
705 (tblock->envelope_to_add ? topt_add_envelope_to : 0)
706 };
707
708 if (bounce_return_size_limit > 0 && !tblock->headers_only)
709 {
710 struct stat statbuf;
711 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
712 DELIVER_IN_BUFFER_SIZE;
713 if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max)
714 {
715 fprintf(f, "\n%s"
716 "------ The body of the message is " OFF_T_FMT " characters long; only the first\n"
717 "------ %d or so are included here.\n\n", rubric, statbuf.st_size,
718 (max/1000)*1000);
719 }
720 else fprintf(f, "\n%s\n", rubric);
721 }
722 else fprintf(f, "\n%s\n", rubric);
723
724 fflush(f);
725 transport_count = 0;
726 transport_write_message(&tctx, bounce_return_size_limit);
727 }
728
729 /* End the message and wait for the child process to end; no timeout. */
730
731 (void)fclose(f);
732 rc = child_close(pid, 0);
733
734 /* Update the "sent to" log whatever the yield. This errs on the side of
735 missing out a message rather than risking sending more than one. We either have
736 cache_fd set to a fixed size, circular buffer file, or dbm_file set to an open
737 DBM file (or neither, if "once" is not set). */
738
739 /* Update fixed-size cache file. If cache_time is set, we found a previous
740 entry; that is the spot into which to put the current time. Otherwise we have
741 to add a new record; remove the first one in the file if the file is too big.
742 We always rewrite the entire file in a single write operation. This is
743 (hopefully) going to be the safest thing because there is no interlocking
744 between multiple simultaneous deliveries. */
745
746 if (cache_fd >= 0)
747 {
748 uschar *from = cache_buff;
749 int size = cache_size;
750
751 if (lseek(cache_fd, 0, SEEK_SET) == 0)
752 {
753 if (!cache_time)
754 {
755 cache_time = from + size;
756 memcpy(cache_time + sizeof(time_t), to, add_size - sizeof(time_t));
757 size += add_size;
758
759 if (cache_size > 0 && size > ob->once_file_size)
760 {
761 from += sizeof(time_t) + Ustrlen(from + sizeof(time_t)) + 1;
762 size -= (from - cache_buff);
763 }
764 }
765
766 memcpy(cache_time, &now, sizeof(time_t));
767 if(write(cache_fd, from, size) != size)
768 DEBUG(D_transport) debug_printf("Problem writing cache file %s for %s "
769 "transport\n", oncelog, tblock->name);
770 }
771 }
772
773 /* Update DBM file */
774
775 else if (dbm_file)
776 {
777 EXIM_DATUM key_datum, value_datum;
778 EXIM_DATUM_INIT(key_datum); /* Some DBM libraries need to have */
779 EXIM_DATUM_INIT(value_datum); /* cleared datums. */
780 EXIM_DATUM_DATA(key_datum) = CS to;
781 EXIM_DATUM_SIZE(key_datum) = Ustrlen(to) + 1;
782
783 /* Many OS define the datum value, sensibly, as a void *. However, there
784 are some which still have char *. By casting this address to a char * we
785 can avoid warning messages from the char * systems. */
786
787 EXIM_DATUM_DATA(value_datum) = CS (&now);
788 EXIM_DATUM_SIZE(value_datum) = (int)sizeof(time_t);
789 EXIM_DBPUT(dbm_file, key_datum, value_datum);
790 }
791
792 /* If sending failed, defer to try again - but if once is set the next
793 try will skip, of course. However, if there were no recipients in the
794 message, we do not fail. */
795
796 if (rc != 0)
797 if (rc == EXIT_NORECIPIENTS)
798 {
799 DEBUG(D_any) debug_printf("%s transport: message contained no recipients\n",
800 tblock->name);
801 }
802 else
803 {
804 addr->transport_return = DEFER;
805 addr->message = string_sprintf("Failed to send message from %s "
806 "transport (%d)", tblock->name, rc);
807 goto END_OFF;
808 }
809
810 /* Log the sending of the message if successful and required. If the file
811 fails to open, it's hard to know what to do. We cannot write to the Exim
812 log from here, since we may be running under an unprivileged uid. We don't
813 want to fail the delivery, since the message has been successfully sent. For
814 the moment, ignore open failures. Write the log entry as a single write() to a
815 file opened for appending, in order to avoid interleaving of output from
816 different processes. The log_buffer can be used exactly as for main log
817 writing. */
818
819 if (logfile)
820 {
821 int log_fd = Uopen(logfile, O_WRONLY|O_APPEND|O_CREAT, ob->mode);
822 if (log_fd >= 0)
823 {
824 uschar *ptr = log_buffer;
825 DEBUG(D_transport) debug_printf("logging message details\n");
826 sprintf(CS ptr, "%s\n", tod_stamp(tod_log));
827 while(*ptr) ptr++;
828 if (from)
829 {
830 (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer),
831 " From: %s\n", from);
832 while(*ptr) ptr++;
833 }
834 if (to)
835 {
836 (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer),
837 " To: %s\n", to);
838 while(*ptr) ptr++;
839 }
840 if (cc)
841 {
842 (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer),
843 " Cc: %s\n", cc);
844 while(*ptr) ptr++;
845 }
846 if (bcc)
847 {
848 (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer),
849 " Bcc: %s\n", bcc);
850 while(*ptr) ptr++;
851 }
852 if (subject)
853 {
854 (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer),
855 " Subject: %s\n", subject);
856 while(*ptr) ptr++;
857 }
858 if (headers)
859 {
860 (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer),
861 " %s\n", headers);
862 while(*ptr) ptr++;
863 }
864 if(write(log_fd, log_buffer, ptr - log_buffer) != ptr-log_buffer
865 || close(log_fd))
866 DEBUG(D_transport) debug_printf("Problem writing log file %s for %s "
867 "transport\n", logfile, tblock->name);
868 }
869 else DEBUG(D_transport) debug_printf("Failed to open log file %s for %s "
870 "transport: %s\n", logfile, tblock->name, strerror(errno));
871 }
872
873 END_OFF:
874 if (dbm_file) EXIM_DBCLOSE(dbm_file);
875 if (cache_fd > 0) (void)close(cache_fd);
876
877 DEBUG(D_transport) debug_printf("%s transport succeeded\n", tblock->name);
878
879 return FALSE;
880 }
881
882 #endif /*!MACRO_PREDEF*/
883 /* End of transport/autoreply.c */