Fix too-often retry bug after 4xx with more hosts than hosts_max_retry.
[exim.git] / src / src / deliver.c
1 /* $Cambridge: exim/src/src/deliver.c,v 1.37 2006/10/30 16:41:04 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2006 */
8 /* See the file NOTICE for conditions of use and distribution. */
9
10 /* The main code for delivering a message. */
11
12
13 #include "exim.h"
14
15
16 /* Data block for keeping track of subprocesses for parallel remote
17 delivery. */
18
19 typedef struct pardata {
20 address_item *addrlist; /* chain of addresses */
21 address_item *addr; /* next address data expected for */
22 pid_t pid; /* subprocess pid */
23 int fd; /* pipe fd for getting result from subprocess */
24 int transport_count; /* returned transport count value */
25 BOOL done; /* no more data needed */
26 uschar *msg; /* error message */
27 uschar *return_path; /* return_path for these addresses */
28 } pardata;
29
30 /* Values for the process_recipients variable */
31
32 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
33 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
34 RECIP_FAIL_LOOP};
35
36 /* Mutually recursive functions for marking addresses done. */
37
38 static void child_done(address_item *, uschar *);
39 static void address_done(address_item *, uschar *);
40
41 /* Table for turning base-62 numbers into binary */
42
43 static uschar tab62[] =
44 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
45 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
46 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
47 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
48 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
49 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
50 59,60,61}; /* x-z */
51
52
53 /*************************************************
54 * Local static variables *
55 *************************************************/
56
57 /* addr_duplicate is global because it needs to be seen from the Envelope-To
58 writing code. */
59
60 static address_item *addr_defer = NULL;
61 static address_item *addr_failed = NULL;
62 static address_item *addr_fallback = NULL;
63 static address_item *addr_local = NULL;
64 static address_item *addr_new = NULL;
65 static address_item *addr_remote = NULL;
66 static address_item *addr_route = NULL;
67 static address_item *addr_succeed = NULL;
68
69 static FILE *message_log = NULL;
70 static BOOL update_spool;
71 static BOOL remove_journal;
72 static int parcount = 0;
73 static pardata *parlist = NULL;
74 static int return_count;
75 static uschar *frozen_info = US"";
76 static uschar *used_return_path = NULL;
77
78 static uschar spoolname[PATH_MAX];
79
80
81
82 /*************************************************
83 * Make a new address item *
84 *************************************************/
85
86 /* This function gets the store and initializes with default values. The
87 transport_return value defaults to DEFER, so that any unexpected failure to
88 deliver does not wipe out the message. The default unique string is set to a
89 copy of the address, so that its domain can be lowercased.
90
91 Argument:
92 address the RFC822 address string
93 copy force a copy of the address
94
95 Returns: a pointer to an initialized address_item
96 */
97
98 address_item *
99 deliver_make_addr(uschar *address, BOOL copy)
100 {
101 address_item *addr = store_get(sizeof(address_item));
102 *addr = address_defaults;
103 if (copy) address = string_copy(address);
104 addr->address = address;
105 addr->unique = string_copy(address);
106 return addr;
107 }
108
109
110
111
112 /*************************************************
113 * Set expansion values for an address *
114 *************************************************/
115
116 /* Certain expansion variables are valid only when handling an address or
117 address list. This function sets them up or clears the values, according to its
118 argument.
119
120 Arguments:
121 addr the address in question, or NULL to clear values
122 Returns: nothing
123 */
124
125 void
126 deliver_set_expansions(address_item *addr)
127 {
128 if (addr == NULL)
129 {
130 uschar ***p = address_expansions;
131 while (*p != NULL) **p++ = NULL;
132 return;
133 }
134
135 /* Exactly what gets set depends on whether there is one or more addresses, and
136 what they contain. These first ones are always set, taking their values from
137 the first address. */
138
139 if (addr->host_list == NULL)
140 {
141 deliver_host = deliver_host_address = US"";
142 }
143 else
144 {
145 deliver_host = addr->host_list->name;
146 deliver_host_address = addr->host_list->address;
147 }
148
149 deliver_recipients = addr;
150 deliver_address_data = addr->p.address_data;
151 deliver_domain_data = addr->p.domain_data;
152 deliver_localpart_data = addr->p.localpart_data;
153
154 /* These may be unset for multiple addresses */
155
156 deliver_domain = addr->domain;
157 self_hostname = addr->self_hostname;
158
159 #ifdef EXPERIMENTAL_BRIGHTMAIL
160 bmi_deliver = 1; /* deliver by default */
161 bmi_alt_location = NULL;
162 bmi_base64_verdict = NULL;
163 bmi_base64_tracker_verdict = NULL;
164 #endif
165
166 /* If there's only one address we can set everything. */
167
168 if (addr->next == NULL)
169 {
170 address_item *addr_orig;
171
172 deliver_localpart = addr->local_part;
173 deliver_localpart_prefix = addr->prefix;
174 deliver_localpart_suffix = addr->suffix;
175
176 for (addr_orig = addr; addr_orig->parent != NULL;
177 addr_orig = addr_orig->parent);
178 deliver_domain_orig = addr_orig->domain;
179
180 /* Re-instate any prefix and suffix in the original local part. In all
181 normal cases, the address will have a router associated with it, and we can
182 choose the caseful or caseless version accordingly. However, when a system
183 filter sets up a pipe, file, or autoreply delivery, no router is involved.
184 In this case, though, there won't be any prefix or suffix to worry about. */
185
186 deliver_localpart_orig = (addr_orig->router == NULL)? addr_orig->local_part :
187 addr_orig->router->caseful_local_part?
188 addr_orig->cc_local_part : addr_orig->lc_local_part;
189
190 /* If there's a parent, make its domain and local part available, and if
191 delivering to a pipe or file, or sending an autoreply, get the local
192 part from the parent. For pipes and files, put the pipe or file string
193 into address_pipe and address_file. */
194
195 if (addr->parent != NULL)
196 {
197 deliver_domain_parent = addr->parent->domain;
198 deliver_localpart_parent = (addr->parent->router == NULL)?
199 addr->parent->local_part :
200 addr->parent->router->caseful_local_part?
201 addr->parent->cc_local_part : addr->parent->lc_local_part;
202
203 /* File deliveries have their own flag because they need to be picked out
204 as special more often. */
205
206 if (testflag(addr, af_pfr))
207 {
208 if (testflag(addr, af_file)) address_file = addr->local_part;
209 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
210 deliver_localpart = addr->parent->local_part;
211 deliver_localpart_prefix = addr->parent->prefix;
212 deliver_localpart_suffix = addr->parent->suffix;
213 }
214 }
215
216 #ifdef EXPERIMENTAL_BRIGHTMAIL
217 /* Set expansion variables related to Brightmail AntiSpam */
218 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
219 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
220 /* get message delivery status (0 - don't deliver | 1 - deliver) */
221 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
222 /* if message is to be delivered, get eventual alternate location */
223 if (bmi_deliver == 1) {
224 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
225 };
226 #endif
227
228 }
229
230 /* For multiple addresses, don't set local part, and leave the domain and
231 self_hostname set only if it is the same for all of them. It is possible to
232 have multiple pipe and file addresses, but only when all addresses have routed
233 to the same pipe or file. */
234
235 else
236 {
237 address_item *addr2;
238 if (testflag(addr, af_pfr))
239 {
240 if (testflag(addr, af_file)) address_file = addr->local_part;
241 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
242 }
243 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
244 {
245 if (deliver_domain != NULL &&
246 Ustrcmp(deliver_domain, addr2->domain) != 0)
247 deliver_domain = NULL;
248 if (self_hostname != NULL && (addr2->self_hostname == NULL ||
249 Ustrcmp(self_hostname, addr2->self_hostname) != 0))
250 self_hostname = NULL;
251 if (deliver_domain == NULL && self_hostname == NULL) break;
252 }
253 }
254 }
255
256
257
258
259 /*************************************************
260 * Open a msglog file *
261 *************************************************/
262
263 /* This function is used both for normal message logs, and for files in the
264 msglog directory that are used to catch output from pipes. Try to create the
265 directory if it does not exist. From release 4.21, normal message logs should
266 be created when the message is received.
267
268 Argument:
269 filename the file name
270 mode the mode required
271 error used for saying what failed
272
273 Returns: a file descriptor, or -1 (with errno set)
274 */
275
276 static int
277 open_msglog_file(uschar *filename, int mode, uschar **error)
278 {
279 int fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
280
281 if (fd < 0 && errno == ENOENT)
282 {
283 uschar temp[16];
284 sprintf(CS temp, "msglog/%s", message_subdir);
285 if (message_subdir[0] == 0) temp[6] = 0;
286 (void)directory_make(spool_directory, temp, MSGLOG_DIRECTORY_MODE, TRUE);
287 fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
288 }
289
290 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
291 function is called as root). Double check the mode, because the group setting
292 doesn't always get set automatically. */
293
294 if (fd >= 0)
295 {
296 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
297 if (fchown(fd, exim_uid, exim_gid) < 0)
298 {
299 *error = US"chown";
300 return -1;
301 }
302 if (fchmod(fd, mode) < 0)
303 {
304 *error = US"chmod";
305 return -1;
306 }
307 }
308 else *error = US"create";
309
310 return fd;
311 }
312
313
314
315
316 /*************************************************
317 * Write to msglog if required *
318 *************************************************/
319
320 /* Write to the message log, if configured. This function may also be called
321 from transports.
322
323 Arguments:
324 format a string format
325
326 Returns: nothing
327 */
328
329 void
330 deliver_msglog(const char *format, ...)
331 {
332 va_list ap;
333 if (!message_logs) return;
334 va_start(ap, format);
335 vfprintf(message_log, format, ap);
336 fflush(message_log);
337 va_end(ap);
338 }
339
340
341
342
343 /*************************************************
344 * Replicate status for batch *
345 *************************************************/
346
347 /* When a transport handles a batch of addresses, it may treat them
348 individually, or it may just put the status in the first one, and return FALSE,
349 requesting that the status be copied to all the others externally. This is the
350 replication function. As well as the status, it copies the transport pointer,
351 which may have changed if appendfile passed the addresses on to a different
352 transport.
353
354 Argument: pointer to the first address in a chain
355 Returns: nothing
356 */
357
358 static void
359 replicate_status(address_item *addr)
360 {
361 address_item *addr2;
362 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
363 {
364 addr2->transport = addr->transport;
365 addr2->transport_return = addr->transport_return;
366 addr2->basic_errno = addr->basic_errno;
367 addr2->more_errno = addr->more_errno;
368 addr2->special_action = addr->special_action;
369 addr2->message = addr->message;
370 addr2->user_message = addr->user_message;
371 }
372 }
373
374
375
376 /*************************************************
377 * Compare lists of hosts *
378 *************************************************/
379
380 /* This function is given two pointers to chains of host items, and it yields
381 TRUE if the lists refer to the same hosts in the same order, except that
382
383 (1) Multiple hosts with the same non-negative MX values are permitted to appear
384 in different orders. Round-robinning nameservers can cause this to happen.
385
386 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
387 permitted to appear in different orders. This is caused by randomizing
388 hosts lists.
389
390 This enables Exim to use a single SMTP transaction for sending to two entirely
391 different domains that happen to end up pointing at the same hosts.
392
393 Arguments:
394 one points to the first host list
395 two points to the second host list
396
397 Returns: TRUE if the lists refer to the same host set
398 */
399
400 static BOOL
401 same_hosts(host_item *one, host_item *two)
402 {
403 while (one != NULL && two != NULL)
404 {
405 if (Ustrcmp(one->name, two->name) != 0)
406 {
407 int mx = one->mx;
408 host_item *end_one = one;
409 host_item *end_two = two;
410
411 /* Batch up only if there was no MX and the list was not randomized */
412
413 if (mx == MX_NONE) return FALSE;
414
415 /* Find the ends of the shortest sequence of identical MX values */
416
417 while (end_one->next != NULL && end_one->next->mx == mx &&
418 end_two->next != NULL && end_two->next->mx == mx)
419 {
420 end_one = end_one->next;
421 end_two = end_two->next;
422 }
423
424 /* If there aren't any duplicates, there's no match. */
425
426 if (end_one == one) return FALSE;
427
428 /* For each host in the 'one' sequence, check that it appears in the 'two'
429 sequence, returning FALSE if not. */
430
431 for (;;)
432 {
433 host_item *hi;
434 for (hi = two; hi != end_two->next; hi = hi->next)
435 if (Ustrcmp(one->name, hi->name) == 0) break;
436 if (hi == end_two->next) return FALSE;
437 if (one == end_one) break;
438 one = one->next;
439 }
440
441 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
442 Ensure both are pointing at the last host, and carry on as for equality. */
443
444 two = end_two;
445 }
446
447 /* Hosts matched */
448
449 one = one->next;
450 two = two->next;
451 }
452
453 /* True if both are NULL */
454
455 return (one == two);
456 }
457
458
459
460 /*************************************************
461 * Compare header lines *
462 *************************************************/
463
464 /* This function is given two pointers to chains of header items, and it yields
465 TRUE if they are the same header texts in the same order.
466
467 Arguments:
468 one points to the first header list
469 two points to the second header list
470
471 Returns: TRUE if the lists refer to the same header set
472 */
473
474 static BOOL
475 same_headers(header_line *one, header_line *two)
476 {
477 for (;;)
478 {
479 if (one == two) return TRUE; /* Includes the case where both NULL */
480 if (one == NULL || two == NULL) return FALSE;
481 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
482 one = one->next;
483 two = two->next;
484 }
485 }
486
487
488
489 /*************************************************
490 * Compare string settings *
491 *************************************************/
492
493 /* This function is given two pointers to strings, and it returns
494 TRUE if they are the same pointer, or if the two strings are the same.
495
496 Arguments:
497 one points to the first string
498 two points to the second string
499
500 Returns: TRUE or FALSE
501 */
502
503 static BOOL
504 same_strings(uschar *one, uschar *two)
505 {
506 if (one == two) return TRUE; /* Includes the case where both NULL */
507 if (one == NULL || two == NULL) return FALSE;
508 return (Ustrcmp(one, two) == 0);
509 }
510
511
512
513 /*************************************************
514 * Compare uid/gid for addresses *
515 *************************************************/
516
517 /* This function is given a transport and two addresses. It yields TRUE if the
518 uid/gid/initgroups settings for the two addresses are going to be the same when
519 they are delivered.
520
521 Arguments:
522 tp the transort
523 addr1 the first address
524 addr2 the second address
525
526 Returns: TRUE or FALSE
527 */
528
529 static BOOL
530 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
531 {
532 if (!tp->uid_set && tp->expand_uid == NULL && !tp->deliver_as_creator)
533 {
534 if (testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set) ||
535 (testflag(addr1, af_uid_set) &&
536 (addr1->uid != addr2->uid ||
537 testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups))))
538 return FALSE;
539 }
540
541 if (!tp->gid_set && tp->expand_gid == NULL)
542 {
543 if (testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set) ||
544 (testflag(addr1, af_gid_set) && addr1->gid != addr2->gid))
545 return FALSE;
546 }
547
548 return TRUE;
549 }
550
551
552
553
554 /*************************************************
555 * Record that an address is complete *
556 *************************************************/
557
558 /* This function records that an address is complete. This is straightforward
559 for most addresses, where the unique address is just the full address with the
560 domain lower cased. For homonyms (addresses that are the same as one of their
561 ancestors) their are complications. Their unique addresses have \x\ prepended
562 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
563 cousins.
564
565 Exim used to record the unique addresses of homonyms as "complete". This,
566 however, fails when the pattern of redirection varies over time (e.g. if taking
567 unseen copies at only some times of day) because the prepended numbers may vary
568 from one delivery run to the next. This problem is solved by never recording
569 prepended unique addresses as complete. Instead, when a homonymic address has
570 actually been delivered via a transport, we record its basic unique address
571 followed by the name of the transport. This is checked in subsequent delivery
572 runs whenever an address is routed to a transport.
573
574 If the completed address is a top-level one (has no parent, which means it
575 cannot be homonymic) we also add the original address to the non-recipients
576 tree, so that it gets recorded in the spool file and therefore appears as
577 "done" in any spool listings. The original address may differ from the unique
578 address in the case of the domain.
579
580 Finally, this function scans the list of duplicates, marks as done any that
581 match this address, and calls child_done() for their ancestors.
582
583 Arguments:
584 addr address item that has been completed
585 now current time as a string
586
587 Returns: nothing
588 */
589
590 static void
591 address_done(address_item *addr, uschar *now)
592 {
593 address_item *dup;
594
595 update_spool = TRUE; /* Ensure spool gets updated */
596
597 /* Top-level address */
598
599 if (addr->parent == NULL)
600 {
601 tree_add_nonrecipient(addr->unique);
602 tree_add_nonrecipient(addr->address);
603 }
604
605 /* Homonymous child address */
606
607 else if (testflag(addr, af_homonym))
608 {
609 if (addr->transport != NULL)
610 {
611 tree_add_nonrecipient(
612 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
613 }
614 }
615
616 /* Non-homonymous child address */
617
618 else tree_add_nonrecipient(addr->unique);
619
620 /* Check the list of duplicate addresses and ensure they are now marked
621 done as well. */
622
623 for (dup = addr_duplicate; dup != NULL; dup = dup->next)
624 {
625 if (Ustrcmp(addr->unique, dup->unique) == 0)
626 {
627 tree_add_nonrecipient(dup->address);
628 child_done(dup, now);
629 }
630 }
631 }
632
633
634
635
636 /*************************************************
637 * Decrease counts in parents and mark done *
638 *************************************************/
639
640 /* This function is called when an address is complete. If there is a parent
641 address, its count of children is decremented. If there are still other
642 children outstanding, the function exits. Otherwise, if the count has become
643 zero, address_done() is called to mark the parent and its duplicates complete.
644 Then loop for any earlier ancestors.
645
646 Arguments:
647 addr points to the completed address item
648 now the current time as a string, for writing to the message log
649
650 Returns: nothing
651 */
652
653 static void
654 child_done(address_item *addr, uschar *now)
655 {
656 address_item *aa;
657 while (addr->parent != NULL)
658 {
659 addr = addr->parent;
660 if ((addr->child_count -= 1) > 0) return; /* Incomplete parent */
661 address_done(addr, now);
662
663 /* Log the completion of all descendents only when there is no ancestor with
664 the same original address. */
665
666 for (aa = addr->parent; aa != NULL; aa = aa->parent)
667 if (Ustrcmp(aa->address, addr->address) == 0) break;
668 if (aa != NULL) continue;
669
670 deliver_msglog("%s %s: children all complete\n", now, addr->address);
671 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
672 }
673 }
674
675
676
677
678 /*************************************************
679 * Actions at the end of handling an address *
680 *************************************************/
681
682 /* This is a function for processing a single address when all that can be done
683 with it has been done.
684
685 Arguments:
686 addr points to the address block
687 result the result of the delivery attempt
688 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
689 driver_type indicates which type of driver (transport, or router) was last
690 to process the address
691 logchar '=' or '-' for use when logging deliveries with => or ->
692
693 Returns: nothing
694 */
695
696 static void
697 post_process_one(address_item *addr, int result, int logflags, int driver_type,
698 int logchar)
699 {
700 uschar *now = tod_stamp(tod_log);
701 uschar *driver_kind = NULL;
702 uschar *driver_name = NULL;
703 uschar *log_address;
704
705 int size = 256; /* Used for a temporary, */
706 int ptr = 0; /* expanding buffer, for */
707 uschar *s; /* building log lines; */
708 void *reset_point; /* released afterwards. */
709
710
711 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
712
713 /* Set up driver kind and name for logging. Disable logging if the router or
714 transport has disabled it. */
715
716 if (driver_type == DTYPE_TRANSPORT)
717 {
718 if (addr->transport != NULL)
719 {
720 driver_name = addr->transport->name;
721 driver_kind = US" transport";
722 disable_logging = addr->transport->disable_logging;
723 }
724 else driver_kind = US"transporting";
725 }
726 else if (driver_type == DTYPE_ROUTER)
727 {
728 if (addr->router != NULL)
729 {
730 driver_name = addr->router->name;
731 driver_kind = US" router";
732 disable_logging = addr->router->disable_logging;
733 }
734 else driver_kind = US"routing";
735 }
736
737 /* If there's an error message set, ensure that it contains only printing
738 characters - it should, but occasionally things slip in and this at least
739 stops the log format from getting wrecked. We also scan the message for an LDAP
740 expansion item that has a password setting, and flatten the password. This is a
741 fudge, but I don't know a cleaner way of doing this. (If the item is badly
742 malformed, it won't ever have gone near LDAP.) */
743
744 if (addr->message != NULL)
745 {
746 addr->message = string_printing(addr->message);
747 if (Ustrstr(addr->message, "failed to expand") != NULL &&
748 (Ustrstr(addr->message, "ldap:") != NULL ||
749 Ustrstr(addr->message, "ldapdn:") != NULL ||
750 Ustrstr(addr->message, "ldapm:") != NULL))
751 {
752 uschar *p = Ustrstr(addr->message, "pass=");
753 if (p != NULL)
754 {
755 p += 5;
756 while (*p != 0 && !isspace(*p)) *p++ = 'x';
757 }
758 }
759 }
760
761 /* If we used a transport that has one of the "return_output" options set, and
762 if it did in fact generate some output, then for return_output we treat the
763 message as failed if it was not already set that way, so that the output gets
764 returned to the sender, provided there is a sender to send it to. For
765 return_fail_output, do this only if the delivery failed. Otherwise we just
766 unlink the file, and remove the name so that if the delivery failed, we don't
767 try to send back an empty or unwanted file. The log_output options operate only
768 on a non-empty file.
769
770 In any case, we close the message file, because we cannot afford to leave a
771 file-descriptor for one address while processing (maybe very many) others. */
772
773 if (addr->return_file >= 0 && addr->return_filename != NULL)
774 {
775 BOOL return_output = FALSE;
776 struct stat statbuf;
777 fsync(addr->return_file);
778
779 /* If there is no output, do nothing. */
780
781 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
782 {
783 transport_instance *tb = addr->transport;
784
785 /* Handle logging options */
786
787 if (tb->log_output || (result == FAIL && tb->log_fail_output) ||
788 (result == DEFER && tb->log_defer_output))
789 {
790 uschar *s;
791 FILE *f = Ufopen(addr->return_filename, "rb");
792 if (f == NULL)
793 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
794 "from %s transport: %s", addr->return_filename, tb->name,
795 strerror(errno));
796 else
797 {
798 s = US Ufgets(big_buffer, big_buffer_size, f);
799 if (s != NULL)
800 {
801 uschar *p = big_buffer + Ustrlen(big_buffer);
802 while (p > big_buffer && isspace(p[-1])) p--;
803 *p = 0;
804 s = string_printing(big_buffer);
805 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
806 addr->address, tb->name, s);
807 }
808 (void)fclose(f);
809 }
810 }
811
812 /* Handle returning options, but only if there is an address to return
813 the text to. */
814
815 if (sender_address[0] != 0 || addr->p.errors_address != NULL)
816 {
817 if (tb->return_output)
818 {
819 addr->transport_return = result = FAIL;
820 if (addr->basic_errno == 0 && addr->message == NULL)
821 addr->message = US"return message generated";
822 return_output = TRUE;
823 }
824 else
825 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
826 }
827 }
828
829 /* Get rid of the file unless it might be returned, but close it in
830 all cases. */
831
832 if (!return_output)
833 {
834 Uunlink(addr->return_filename);
835 addr->return_filename = NULL;
836 addr->return_file = -1;
837 }
838
839 (void)close(addr->return_file);
840 }
841
842 /* Create the address string for logging. Must not do this earlier, because
843 an OK result may be changed to FAIL when a pipe returns text. */
844
845 log_address = string_log_address(addr,
846 (log_write_selector & L_all_parents) != 0, result == OK);
847
848 /* The sucess case happens only after delivery by a transport. */
849
850 if (result == OK)
851 {
852 addr->next = addr_succeed;
853 addr_succeed = addr;
854
855 /* Call address_done() to ensure that we don't deliver to this address again,
856 and write appropriate things to the message log. If it is a child address, we
857 call child_done() to scan the ancestors and mark them complete if this is the
858 last child to complete. */
859
860 address_done(addr, now);
861 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
862
863 if (addr->parent == NULL)
864 {
865 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
866 driver_name, driver_kind);
867 }
868 else
869 {
870 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
871 addr->parent->address, driver_name, driver_kind);
872 child_done(addr, now);
873 }
874
875 /* Log the delivery on the main log. We use an extensible string to build up
876 the log line, and reset the store afterwards. Remote deliveries should always
877 have a pointer to the host item that succeeded; local deliveries can have a
878 pointer to a single host item in their host list, for use by the transport. */
879
880 s = reset_point = store_get(size);
881 s[ptr++] = logchar;
882
883 s = string_append(s, &size, &ptr, 2, US"> ", log_address);
884
885 if ((log_extra_selector & LX_sender_on_delivery) != 0)
886 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
887
888 #ifdef EXPERIMENTAL_SRS
889 if(addr->p.srs_sender)
890 s = string_append(s, &size, &ptr, 3, US" SRS=<", addr->p.srs_sender, US">");
891 #endif
892
893 /* You might think that the return path must always be set for a successful
894 delivery; indeed, I did for some time, until this statement crashed. The case
895 when it is not set is for a delivery to /dev/null which is optimised by not
896 being run at all. */
897
898 if (used_return_path != NULL &&
899 (log_extra_selector & LX_return_path_on_delivery) != 0)
900 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
901
902 /* For a delivery from a system filter, there may not be a router */
903
904 if (addr->router != NULL)
905 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
906
907 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
908
909 if ((log_extra_selector & LX_delivery_size) != 0)
910 s = string_append(s, &size, &ptr, 2, US" S=",
911 string_sprintf("%d", transport_count));
912
913 /* Local delivery */
914
915 if (addr->transport->info->local)
916 {
917 if (addr->host_list != NULL)
918 s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name);
919 if (addr->shadow_message != NULL)
920 s = string_cat(s, &size, &ptr, addr->shadow_message,
921 Ustrlen(addr->shadow_message));
922 }
923
924 /* Remote delivery */
925
926 else
927 {
928 if (addr->host_used != NULL)
929 {
930 s = string_append(s, &size, &ptr, 5, US" H=", addr->host_used->name,
931 US" [", addr->host_used->address, US"]");
932 if ((log_extra_selector & LX_outgoing_port) != 0)
933 s = string_append(s, &size, &ptr, 2, US":", string_sprintf("%d",
934 addr->host_used->port));
935 if (continue_sequence > 1)
936 s = string_cat(s, &size, &ptr, US"*", 1);
937 }
938
939 #ifdef SUPPORT_TLS
940 if ((log_extra_selector & LX_tls_cipher) != 0 && addr->cipher != NULL)
941 s = string_append(s, &size, &ptr, 2, US" X=", addr->cipher);
942 if ((log_extra_selector & LX_tls_certificate_verified) != 0 &&
943 addr->cipher != NULL)
944 s = string_append(s, &size, &ptr, 2, US" CV=",
945 testflag(addr, af_cert_verified)? "yes":"no");
946 if ((log_extra_selector & LX_tls_peerdn) != 0 && addr->peerdn != NULL)
947 s = string_append(s, &size, &ptr, 3, US" DN=\"", addr->peerdn, US"\"");
948 #endif
949
950 if ((log_extra_selector & LX_smtp_confirmation) != 0 &&
951 addr->message != NULL)
952 {
953 int i;
954 uschar *p = big_buffer;
955 uschar *ss = addr->message;
956 *p++ = '\"';
957 for (i = 0; i < 100 && ss[i] != 0; i++)
958 {
959 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\';
960 *p++ = ss[i];
961 }
962 *p++ = '\"';
963 *p = 0;
964 s = string_append(s, &size, &ptr, 2, US" C=", big_buffer);
965 }
966 }
967
968 /* Time on queue and actual time taken to deliver */
969
970 if ((log_extra_selector & LX_queue_time) != 0)
971 {
972 s = string_append(s, &size, &ptr, 2, US" QT=",
973 readconf_printtime(time(NULL) - received_time));
974 }
975
976 if ((log_extra_selector & LX_deliver_time) != 0)
977 {
978 s = string_append(s, &size, &ptr, 2, US" DT=",
979 readconf_printtime(addr->more_errno));
980 }
981
982 /* string_cat() always leaves room for the terminator. Release the
983 store we used to build the line after writing it. */
984
985 s[ptr] = 0;
986 log_write(0, LOG_MAIN, "%s", s);
987 store_reset(reset_point);
988 }
989
990
991 /* Soft failure, or local delivery process failed; freezing may be
992 requested. */
993
994 else if (result == DEFER || result == PANIC)
995 {
996 if (result == PANIC) logflags |= LOG_PANIC;
997
998 /* This puts them on the chain in reverse order. Do not change this, because
999 the code for handling retries assumes that the one with the retry
1000 information is last. */
1001
1002 addr->next = addr_defer;
1003 addr_defer = addr;
1004
1005 /* The only currently implemented special action is to freeze the
1006 message. Logging of this is done later, just before the -H file is
1007 updated. */
1008
1009 if (addr->special_action == SPECIAL_FREEZE)
1010 {
1011 deliver_freeze = TRUE;
1012 deliver_frozen_at = time(NULL);
1013 update_spool = TRUE;
1014 }
1015
1016 /* If doing a 2-stage queue run, we skip writing to either the message
1017 log or the main log for SMTP defers. */
1018
1019 if (!queue_2stage || addr->basic_errno != 0)
1020 {
1021 uschar ss[32];
1022
1023 /* For errors of the type "retry time not reached" (also remotes skipped
1024 on queue run), logging is controlled by L_retry_defer. Note that this kind
1025 of error number is negative, and all the retry ones are less than any
1026 others. */
1027
1028 unsigned int use_log_selector = (addr->basic_errno <= ERRNO_RETRY_BASE)?
1029 L_retry_defer : 0;
1030
1031 /* Build up the line that is used for both the message log and the main
1032 log. */
1033
1034 s = reset_point = store_get(size);
1035 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1036
1037 /* Either driver_name contains something and driver_kind contains
1038 " router" or " transport" (note the leading space), or driver_name is
1039 a null string and driver_kind contains "routing" without the leading
1040 space, if all routing has been deferred. When a domain has been held,
1041 so nothing has been done at all, both variables contain null strings. */
1042
1043 if (driver_name == NULL)
1044 {
1045 if (driver_kind != NULL)
1046 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1047 }
1048 else
1049 {
1050 if (driver_kind[1] == 't' && addr->router != NULL)
1051 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1052 Ustrcpy(ss, " ?=");
1053 ss[1] = toupper(driver_kind[1]);
1054 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1055 }
1056
1057 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1058 s = string_cat(s, &size, &ptr, ss, Ustrlen(ss));
1059
1060 if (addr->basic_errno > 0)
1061 s = string_append(s, &size, &ptr, 2, US": ",
1062 US strerror(addr->basic_errno));
1063
1064 if (addr->message != NULL)
1065 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1066
1067 s[ptr] = 0;
1068
1069 /* Log the deferment in the message log, but don't clutter it
1070 up with retry-time defers after the first delivery attempt. */
1071
1072 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1073 deliver_msglog("%s %s\n", now, s);
1074
1075 /* Write the main log and reset the store */
1076
1077 log_write(use_log_selector, logflags, "== %s", s);
1078 store_reset(reset_point);
1079 }
1080 }
1081
1082
1083 /* Hard failure. If there is an address to which an error message can be sent,
1084 put this address on the failed list. If not, put it on the deferred list and
1085 freeze the mail message for human attention. The latter action can also be
1086 explicitly requested by a router or transport. */
1087
1088 else
1089 {
1090 /* If this is a delivery error, or a message for which no replies are
1091 wanted, and the message's age is greater than ignore_bounce_errors_after,
1092 force the af_ignore_error flag. This will cause the address to be discarded
1093 later (with a log entry). */
1094
1095 if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
1096 setflag(addr, af_ignore_error);
1097
1098 /* Freeze the message if requested, or if this is a bounce message (or other
1099 message with null sender) and this address does not have its own errors
1100 address. However, don't freeze if errors are being ignored. The actual code
1101 to ignore occurs later, instead of sending a message. Logging of freezing
1102 occurs later, just before writing the -H file. */
1103
1104 if (!testflag(addr, af_ignore_error) &&
1105 (addr->special_action == SPECIAL_FREEZE ||
1106 (sender_address[0] == 0 && addr->p.errors_address == NULL)
1107 ))
1108 {
1109 frozen_info = (addr->special_action == SPECIAL_FREEZE)? US"" :
1110 (sender_local && !local_error_message)?
1111 US" (message created with -f <>)" : US" (delivery error message)";
1112 deliver_freeze = TRUE;
1113 deliver_frozen_at = time(NULL);
1114 update_spool = TRUE;
1115
1116 /* The address is put on the defer rather than the failed queue, because
1117 the message is being retained. */
1118
1119 addr->next = addr_defer;
1120 addr_defer = addr;
1121 }
1122
1123 /* Don't put the address on the nonrecipients tree yet; wait until an
1124 error message has been successfully sent. */
1125
1126 else
1127 {
1128 addr->next = addr_failed;
1129 addr_failed = addr;
1130 }
1131
1132 /* Build up the log line for the message and main logs */
1133
1134 s = reset_point = store_get(size);
1135 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1136
1137 if ((log_extra_selector & LX_sender_on_delivery) != 0)
1138 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1139
1140 /* Return path may not be set if no delivery actually happened */
1141
1142 if (used_return_path != NULL &&
1143 (log_extra_selector & LX_return_path_on_delivery) != 0)
1144 {
1145 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1146 }
1147
1148 if (addr->router != NULL)
1149 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1150 if (addr->transport != NULL)
1151 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1152
1153 if (addr->host_used != NULL)
1154 s = string_append(s, &size, &ptr, 5, US" H=", addr->host_used->name,
1155 US" [", addr->host_used->address, US"]");
1156
1157 if (addr->basic_errno > 0)
1158 s = string_append(s, &size, &ptr, 2, US": ",
1159 US strerror(addr->basic_errno));
1160
1161 if (addr->message != NULL)
1162 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1163
1164 s[ptr] = 0;
1165
1166 /* Do the logging. For the message log, "routing failed" for those cases,
1167 just to make it clearer. */
1168
1169 if (driver_name == NULL)
1170 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1171 else
1172 deliver_msglog("%s %s\n", now, s);
1173
1174 log_write(0, LOG_MAIN, "** %s", s);
1175 store_reset(reset_point);
1176 }
1177
1178 /* Ensure logging is turned on again in all cases */
1179
1180 disable_logging = FALSE;
1181 }
1182
1183
1184
1185
1186 /*************************************************
1187 * Address-independent error *
1188 *************************************************/
1189
1190 /* This function is called when there's an error that is not dependent on a
1191 particular address, such as an expansion string failure. It puts the error into
1192 all the addresses in a batch, logs the incident on the main and panic logs, and
1193 clears the expansions. It is mostly called from local_deliver(), but can be
1194 called for a remote delivery via findugid().
1195
1196 Arguments:
1197 logit TRUE if (MAIN+PANIC) logging required
1198 addr the first of the chain of addresses
1199 code the error code
1200 format format string for error message, or NULL if already set in addr
1201 ... arguments for the format
1202
1203 Returns: nothing
1204 */
1205
1206 static void
1207 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1208 {
1209 address_item *addr2;
1210 addr->basic_errno = code;
1211
1212 if (format != NULL)
1213 {
1214 va_list ap;
1215 uschar buffer[512];
1216 va_start(ap, format);
1217 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1218 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1219 "common_error expansion was longer than %d", sizeof(buffer));
1220 va_end(ap);
1221 addr->message = string_copy(buffer);
1222 }
1223
1224 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
1225 {
1226 addr2->basic_errno = code;
1227 addr2->message = addr->message;
1228 }
1229
1230 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1231 deliver_set_expansions(NULL);
1232 }
1233
1234
1235
1236
1237 /*************************************************
1238 * Check a "never users" list *
1239 *************************************************/
1240
1241 /* This function is called to check whether a uid is on one of the two "never
1242 users" lists.
1243
1244 Arguments:
1245 uid the uid to be checked
1246 nusers the list to be scanned; the first item in the list is the count
1247
1248 Returns: TRUE if the uid is on the list
1249 */
1250
1251 static BOOL
1252 check_never_users(uid_t uid, uid_t *nusers)
1253 {
1254 int i;
1255 if (nusers == NULL) return FALSE;
1256 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1257 return FALSE;
1258 }
1259
1260
1261
1262 /*************************************************
1263 * Find uid and gid for a transport *
1264 *************************************************/
1265
1266 /* This function is called for both local and remote deliveries, to find the
1267 uid/gid under which to run the delivery. The values are taken preferentially
1268 from the transport (either explicit or deliver_as_creator), then from the
1269 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1270 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1271 panic error is logged, and the function fails (which normally leads to delivery
1272 deferral).
1273
1274 Arguments:
1275 addr the address (possibly a chain)
1276 tp the transport
1277 uidp pointer to uid field
1278 gidp pointer to gid field
1279 igfp pointer to the use_initgroups field
1280
1281 Returns: FALSE if failed - error has been set in address(es)
1282 */
1283
1284 static BOOL
1285 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1286 BOOL *igfp)
1287 {
1288 uschar *nuname = NULL;
1289 BOOL gid_set = FALSE;
1290
1291 /* Default initgroups flag comes from the transport */
1292
1293 *igfp = tp->initgroups;
1294
1295 /* First see if there's a gid on the transport, either fixed or expandable.
1296 The expanding function always logs failure itself. */
1297
1298 if (tp->gid_set)
1299 {
1300 *gidp = tp->gid;
1301 gid_set = TRUE;
1302 }
1303 else if (tp->expand_gid != NULL)
1304 {
1305 if (route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1306 &(addr->message))) gid_set = TRUE;
1307 else
1308 {
1309 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1310 return FALSE;
1311 }
1312 }
1313
1314 /* If the transport did not set a group, see if the router did. */
1315
1316 if (!gid_set && testflag(addr, af_gid_set))
1317 {
1318 *gidp = addr->gid;
1319 gid_set = TRUE;
1320 }
1321
1322 /* Pick up a uid from the transport if one is set. */
1323
1324 if (tp->uid_set) *uidp = tp->uid;
1325
1326 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1327 it does not provide a passwd value from which a gid can be taken. */
1328
1329 else if (tp->expand_uid != NULL)
1330 {
1331 struct passwd *pw;
1332 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1333 uidp, &(addr->message)))
1334 {
1335 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1336 return FALSE;
1337 }
1338 if (!gid_set && pw != NULL)
1339 {
1340 *gidp = pw->pw_gid;
1341 gid_set = TRUE;
1342 }
1343 }
1344
1345 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1346
1347 else if (tp->deliver_as_creator)
1348 {
1349 *uidp = originator_uid;
1350 if (!gid_set)
1351 {
1352 *gidp = originator_gid;
1353 gid_set = TRUE;
1354 }
1355 }
1356
1357 /* Otherwise see if the address specifies the uid and if so, take it and its
1358 initgroups flag. */
1359
1360 else if (testflag(addr, af_uid_set))
1361 {
1362 *uidp = addr->uid;
1363 *igfp = testflag(addr, af_initgroups);
1364 }
1365
1366 /* Nothing has specified the uid - default to the Exim user, and group if the
1367 gid is not set. */
1368
1369 else
1370 {
1371 *uidp = exim_uid;
1372 if (!gid_set)
1373 {
1374 *gidp = exim_gid;
1375 gid_set = TRUE;
1376 }
1377 }
1378
1379 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1380 defaulting to the Exim uid. In other words, if the configuration has specified
1381 a uid, it must also provide a gid. */
1382
1383 if (!gid_set)
1384 {
1385 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1386 "%s transport", tp->name);
1387 return FALSE;
1388 }
1389
1390 /* Check that the uid is not on the lists of banned uids that may not be used
1391 for delivery processes. */
1392
1393 if (check_never_users(*uidp, never_users))
1394 nuname = US"never_users";
1395 else if (check_never_users(*uidp, fixed_never_users))
1396 nuname = US"fixed_never_users";
1397
1398 if (nuname != NULL)
1399 {
1400 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1401 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1402 return FALSE;
1403 }
1404
1405 /* All is well */
1406
1407 return TRUE;
1408 }
1409
1410
1411
1412
1413 /*************************************************
1414 * Check the size of a message for a transport *
1415 *************************************************/
1416
1417 /* Checks that the message isn't too big for the selected transport.
1418 This is called only when it is known that the limit is set.
1419
1420 Arguments:
1421 tp the transport
1422 addr the (first) address being delivered
1423
1424 Returns: OK
1425 DEFER expansion failed or did not yield an integer
1426 FAIL message too big
1427 */
1428
1429 int
1430 check_message_size(transport_instance *tp, address_item *addr)
1431 {
1432 int rc = OK;
1433 int size_limit;
1434
1435 deliver_set_expansions(addr);
1436 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1437 deliver_set_expansions(NULL);
1438
1439 if (expand_string_message != NULL)
1440 {
1441 rc = DEFER;
1442 if (size_limit == -1)
1443 addr->message = string_sprintf("failed to expand message_size_limit "
1444 "in %s transport: %s", tp->name, expand_string_message);
1445 else
1446 addr->message = string_sprintf("invalid message_size_limit "
1447 "in %s transport: %s", tp->name, expand_string_message);
1448 }
1449 else if (size_limit > 0 && message_size > size_limit)
1450 {
1451 rc = FAIL;
1452 addr->message =
1453 string_sprintf("message is too big (transport limit = %d)",
1454 size_limit);
1455 }
1456
1457 return rc;
1458 }
1459
1460
1461
1462 /*************************************************
1463 * Transport-time check for a previous delivery *
1464 *************************************************/
1465
1466 /* Check that this base address hasn't previously been delivered to its routed
1467 transport. If it has been delivered, mark it done. The check is necessary at
1468 delivery time in order to handle homonymic addresses correctly in cases where
1469 the pattern of redirection changes between delivery attempts (so the unique
1470 fields change). Non-homonymic previous delivery is detected earlier, at routing
1471 time (which saves unnecessary routing).
1472
1473 Arguments:
1474 addr the address item
1475 testing TRUE if testing wanted only, without side effects
1476
1477 Returns: TRUE if previously delivered by the transport
1478 */
1479
1480 static BOOL
1481 previously_transported(address_item *addr, BOOL testing)
1482 {
1483 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
1484 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
1485
1486 if (tree_search(tree_nonrecipients, big_buffer) != 0)
1487 {
1488 DEBUG(D_deliver|D_route|D_transport)
1489 debug_printf("%s was previously delivered (%s transport): discarded\n",
1490 addr->address, addr->transport->name);
1491 if (!testing) child_done(addr, tod_stamp(tod_log));
1492 return TRUE;
1493 }
1494
1495 return FALSE;
1496 }
1497
1498
1499
1500 /******************************************************
1501 * Check for a given header in a header string *
1502 ******************************************************/
1503
1504 /* This function is used when generating quota warnings. The configuration may
1505 specify any header lines it likes in quota_warn_message. If certain of them are
1506 missing, defaults are inserted, so we need to be able to test for the presence
1507 of a given header.
1508
1509 Arguments:
1510 hdr the required header name
1511 hstring the header string
1512
1513 Returns: TRUE the header is in the string
1514 FALSE the header is not in the string
1515 */
1516
1517 static BOOL
1518 contains_header(uschar *hdr, uschar *hstring)
1519 {
1520 int len = Ustrlen(hdr);
1521 uschar *p = hstring;
1522 while (*p != 0)
1523 {
1524 if (strncmpic(p, hdr, len) == 0)
1525 {
1526 p += len;
1527 while (*p == ' ' || *p == '\t') p++;
1528 if (*p == ':') return TRUE;
1529 }
1530 while (*p != 0 && *p != '\n') p++;
1531 if (*p == '\n') p++;
1532 }
1533 return FALSE;
1534 }
1535
1536
1537
1538
1539 /*************************************************
1540 * Perform a local delivery *
1541 *************************************************/
1542
1543 /* Each local delivery is performed in a separate process which sets its
1544 uid and gid as specified. This is a safer way than simply changing and
1545 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
1546 used safely. From release 4, Exim no longer makes any use of it. Besides, not
1547 all systems have seteuid().
1548
1549 If the uid/gid are specified in the transport_instance, they are used; the
1550 transport initialization must ensure that either both or neither are set.
1551 Otherwise, the values associated with the address are used. If neither are set,
1552 it is a configuration error.
1553
1554 The transport or the address may specify a home directory (transport over-
1555 rides), and if they do, this is set as $home. If neither have set a working
1556 directory, this value is used for that as well. Otherwise $home is left unset
1557 and the cwd is set to "/" - a directory that should be accessible to all users.
1558
1559 Using a separate process makes it more complicated to get error information
1560 back. We use a pipe to pass the return code and also an error code and error
1561 text string back to the parent process.
1562
1563 Arguments:
1564 addr points to an address block for this delivery; for "normal" local
1565 deliveries this is the only address to be delivered, but for
1566 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
1567 a number of addresses can be handled simultaneously, and in this
1568 case addr will point to a chain of addresses with the same
1569 characteristics.
1570
1571 shadowing TRUE if running a shadow transport; this causes output from pipes
1572 to be ignored.
1573
1574 Returns: nothing
1575 */
1576
1577 static void
1578 deliver_local(address_item *addr, BOOL shadowing)
1579 {
1580 BOOL use_initgroups;
1581 uid_t uid;
1582 gid_t gid;
1583 int status, len, rc;
1584 int pfd[2];
1585 pid_t pid;
1586 uschar *working_directory;
1587 address_item *addr2;
1588 transport_instance *tp = addr->transport;
1589
1590 /* Set up the return path from the errors or sender address. If the transport
1591 has its own return path setting, expand it and replace the existing value. */
1592
1593 if(addr->p.errors_address != NULL)
1594 return_path = addr->p.errors_address;
1595 #ifdef EXPERIMENTAL_SRS
1596 else if(addr->p.srs_sender != NULL)
1597 return_path = addr->p.srs_sender;
1598 #endif
1599 else
1600 return_path = sender_address;
1601
1602 if (tp->return_path != NULL)
1603 {
1604 uschar *new_return_path = expand_string(tp->return_path);
1605 if (new_return_path == NULL)
1606 {
1607 if (!expand_string_forcedfail)
1608 {
1609 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
1610 US"Failed to expand return path \"%s\" in %s transport: %s",
1611 tp->return_path, tp->name, expand_string_message);
1612 return;
1613 }
1614 }
1615 else return_path = new_return_path;
1616 }
1617
1618 /* For local deliveries, one at a time, the value used for logging can just be
1619 set directly, once and for all. */
1620
1621 used_return_path = return_path;
1622
1623 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
1624 gets put into the address(es), and the expansions are unset, so we can just
1625 return. */
1626
1627 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
1628
1629 /* See if either the transport or the address specifies a home directory. A
1630 home directory set in the address may already be expanded; a flag is set to
1631 indicate that. In other cases we must expand it. */
1632
1633 if ((deliver_home = tp->home_dir) != NULL || /* Set in transport, or */
1634 ((deliver_home = addr->home_dir) != NULL && /* Set in address and */
1635 !testflag(addr, af_home_expanded))) /* not expanded */
1636 {
1637 uschar *rawhome = deliver_home;
1638 deliver_home = NULL; /* in case it contains $home */
1639 deliver_home = expand_string(rawhome);
1640 if (deliver_home == NULL)
1641 {
1642 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
1643 "to expand for %s transport: %s", rawhome, tp->name,
1644 expand_string_message);
1645 return;
1646 }
1647 if (*deliver_home != '/')
1648 {
1649 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
1650 "is not absolute for %s transport", deliver_home, tp->name);
1651 return;
1652 }
1653 }
1654
1655 /* See if either the transport or the address specifies a current directory,
1656 and if so, expand it. If nothing is set, use the home directory, unless it is
1657 also unset in which case use "/", which is assumed to be a directory to which
1658 all users have access. It is necessary to be in a visible directory for some
1659 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
1660 2.5) require this. */
1661
1662 working_directory = (tp->current_dir != NULL)?
1663 tp->current_dir : addr->current_dir;
1664
1665 if (working_directory != NULL)
1666 {
1667 uschar *raw = working_directory;
1668 working_directory = expand_string(raw);
1669 if (working_directory == NULL)
1670 {
1671 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
1672 "failed to expand for %s transport: %s", raw, tp->name,
1673 expand_string_message);
1674 return;
1675 }
1676 if (*working_directory != '/')
1677 {
1678 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
1679 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
1680 return;
1681 }
1682 }
1683 else working_directory = (deliver_home == NULL)? US"/" : deliver_home;
1684
1685 /* If one of the return_output flags is set on the transport, create and open a
1686 file in the message log directory for the transport to write its output onto.
1687 This is mainly used by pipe transports. The file needs to be unique to the
1688 address. This feature is not available for shadow transports. */
1689
1690 if (!shadowing && (tp->return_output || tp->return_fail_output ||
1691 tp->log_output || tp->log_fail_output))
1692 {
1693 uschar *error;
1694 addr->return_filename =
1695 string_sprintf("%s/msglog/%s/%s-%d-%d", spool_directory, message_subdir,
1696 message_id, getpid(), return_count++);
1697 addr->return_file = open_msglog_file(addr->return_filename, 0400, &error);
1698 if (addr->return_file < 0)
1699 {
1700 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
1701 "to return message: %s", error, tp->name, strerror(errno));
1702 return;
1703 }
1704 }
1705
1706 /* Create the pipe for inter-process communication. */
1707
1708 if (pipe(pfd) != 0)
1709 {
1710 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
1711 strerror(errno));
1712 return;
1713 }
1714
1715 /* Now fork the process to do the real work in the subprocess, but first
1716 ensure that all cached resources are freed so that the subprocess starts with
1717 a clean slate and doesn't interfere with the parent process. */
1718
1719 search_tidyup();
1720
1721 if ((pid = fork()) == 0)
1722 {
1723 BOOL replicate = TRUE;
1724
1725 /* Prevent core dumps, as we don't want them in users' home directories.
1726 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
1727 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
1728 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
1729 complain if the error is "not supported". */
1730
1731 #ifdef RLIMIT_CORE
1732 struct rlimit rl;
1733 rl.rlim_cur = 0;
1734 rl.rlim_max = 0;
1735 if (setrlimit(RLIMIT_CORE, &rl) < 0)
1736 {
1737 #ifdef SETRLIMIT_NOT_SUPPORTED
1738 if (errno != ENOSYS && errno != ENOTSUP)
1739 #endif
1740 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
1741 strerror(errno));
1742 }
1743 #endif
1744
1745 /* Reset the random number generator, so different processes don't all
1746 have the same sequence. */
1747
1748 random_seed = 0;
1749
1750 /* If the transport has a setup entry, call this first, while still
1751 privileged. (Appendfile uses this to expand quota, for example, while
1752 able to read private files.) */
1753
1754 if (addr->transport->setup != NULL)
1755 {
1756 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
1757 &(addr->message)))
1758 {
1759 case DEFER:
1760 addr->transport_return = DEFER;
1761 goto PASS_BACK;
1762
1763 case FAIL:
1764 addr->transport_return = PANIC;
1765 goto PASS_BACK;
1766 }
1767 }
1768
1769 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
1770 when the process becomes unprivileged, it won't be able to write to the
1771 process log. SIGHUP is ignored throughout exim, except when it is being
1772 run as a daemon. */
1773
1774 signal(SIGINT, SIG_IGN);
1775 signal(SIGTERM, SIG_IGN);
1776 signal(SIGUSR1, SIG_IGN);
1777
1778 /* Close the unwanted half of the pipe, and set close-on-exec for the other
1779 half - for transports that exec things (e.g. pipe). Then set the required
1780 gid/uid. */
1781
1782 (void)close(pfd[pipe_read]);
1783 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
1784 FD_CLOEXEC);
1785 exim_setugid(uid, gid, use_initgroups,
1786 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
1787 addr->address, addr->transport->name));
1788
1789 DEBUG(D_deliver)
1790 {
1791 address_item *batched;
1792 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
1793 for (batched = addr->next; batched != NULL; batched = batched->next)
1794 debug_printf("additional batched address: %s\n", batched->address);
1795 }
1796
1797 /* Set an appropriate working directory. */
1798
1799 if (Uchdir(working_directory) < 0)
1800 {
1801 addr->transport_return = DEFER;
1802 addr->basic_errno = errno;
1803 addr->message = string_sprintf("failed to chdir to %s", working_directory);
1804 }
1805
1806 /* If successful, call the transport */
1807
1808 else
1809 {
1810 BOOL ok = TRUE;
1811 set_process_info("delivering %s to %s using %s", message_id,
1812 addr->local_part, addr->transport->name);
1813
1814 /* If a transport filter has been specified, set up its argument list.
1815 Any errors will get put into the address, and FALSE yielded. */
1816
1817 if (addr->transport->filter_command != NULL)
1818 {
1819 ok = transport_set_up_command(&transport_filter_argv,
1820 addr->transport->filter_command,
1821 TRUE, PANIC, addr, US"transport filter", NULL);
1822 transport_filter_timeout = addr->transport->filter_timeout;
1823 }
1824 else transport_filter_argv = NULL;
1825
1826 if (ok)
1827 {
1828 debug_print_string(addr->transport->debug_string);
1829 replicate = !(addr->transport->info->code)(addr->transport, addr);
1830 }
1831 }
1832
1833 /* Pass the results back down the pipe. If necessary, first replicate the
1834 status in the top address to the others in the batch. The label is the
1835 subject of a goto when a call to the transport's setup function fails. We
1836 pass the pointer to the transport back in case it got changed as a result of
1837 file_format in appendfile. */
1838
1839 PASS_BACK:
1840
1841 if (replicate) replicate_status(addr);
1842 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
1843 {
1844 int i;
1845 int local_part_length = Ustrlen(addr2->local_part);
1846 uschar *s;
1847
1848 (void)write(pfd[pipe_write], (void *)&(addr2->transport_return), sizeof(int));
1849 (void)write(pfd[pipe_write], (void *)&transport_count, sizeof(transport_count));
1850 (void)write(pfd[pipe_write], (void *)&(addr2->flags), sizeof(addr2->flags));
1851 (void)write(pfd[pipe_write], (void *)&(addr2->basic_errno), sizeof(int));
1852 (void)write(pfd[pipe_write], (void *)&(addr2->more_errno), sizeof(int));
1853 (void)write(pfd[pipe_write], (void *)&(addr2->special_action), sizeof(int));
1854 (void)write(pfd[pipe_write], (void *)&(addr2->transport),
1855 sizeof(transport_instance *));
1856
1857 /* For a file delivery, pass back the local part, in case the original
1858 was only part of the final delivery path. This gives more complete
1859 logging. */
1860
1861 if (testflag(addr2, af_file))
1862 {
1863 (void)write(pfd[pipe_write], (void *)&local_part_length, sizeof(int));
1864 (void)write(pfd[pipe_write], addr2->local_part, local_part_length);
1865 }
1866
1867 /* Now any messages */
1868
1869 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
1870 {
1871 int message_length = (s == NULL)? 0 : Ustrlen(s) + 1;
1872 (void)write(pfd[pipe_write], (void *)&message_length, sizeof(int));
1873 if (message_length > 0) (void)write(pfd[pipe_write], s, message_length);
1874 }
1875 }
1876
1877 /* OK, this process is now done. Free any cached resources that it opened,
1878 and close the pipe we were writing down before exiting. */
1879
1880 (void)close(pfd[pipe_write]);
1881 search_tidyup();
1882 exit(EXIT_SUCCESS);
1883 }
1884
1885 /* Back in the main process: panic if the fork did not succeed. This seems
1886 better than returning an error - if forking is failing it is probably best
1887 not to try other deliveries for this message. */
1888
1889 if (pid < 0)
1890 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
1891 addr->address);
1892
1893 /* Read the pipe to get the delivery status codes and error messages. Our copy
1894 of the writing end must be closed first, as otherwise read() won't return zero
1895 on an empty pipe. We check that a status exists for each address before
1896 overwriting the address structure. If data is missing, the default DEFER status
1897 will remain. Afterwards, close the reading end. */
1898
1899 (void)close(pfd[pipe_write]);
1900
1901 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
1902 {
1903 len = read(pfd[pipe_read], (void *)&status, sizeof(int));
1904 if (len > 0)
1905 {
1906 int i;
1907 uschar **sptr;
1908
1909 addr2->transport_return = status;
1910 len = read(pfd[pipe_read], (void *)&transport_count,
1911 sizeof(transport_count));
1912 len = read(pfd[pipe_read], (void *)&(addr2->flags), sizeof(addr2->flags));
1913 len = read(pfd[pipe_read], (void *)&(addr2->basic_errno), sizeof(int));
1914 len = read(pfd[pipe_read], (void *)&(addr2->more_errno), sizeof(int));
1915 len = read(pfd[pipe_read], (void *)&(addr2->special_action), sizeof(int));
1916 len = read(pfd[pipe_read], (void *)&(addr2->transport),
1917 sizeof(transport_instance *));
1918
1919 if (testflag(addr2, af_file))
1920 {
1921 int local_part_length;
1922 len = read(pfd[pipe_read], (void *)&local_part_length, sizeof(int));
1923 len = read(pfd[pipe_read], (void *)big_buffer, local_part_length);
1924 big_buffer[local_part_length] = 0;
1925 addr2->local_part = string_copy(big_buffer);
1926 }
1927
1928 for (i = 0, sptr = &(addr2->message); i < 2;
1929 i++, sptr = &(addr2->user_message))
1930 {
1931 int message_length;
1932 len = read(pfd[pipe_read], (void *)&message_length, sizeof(int));
1933 if (message_length > 0)
1934 {
1935 len = read(pfd[pipe_read], (void *)big_buffer, message_length);
1936 if (len > 0) *sptr = string_copy(big_buffer);
1937 }
1938 }
1939 }
1940
1941 else
1942 {
1943 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
1944 "from delivery subprocess", addr2->unique);
1945 break;
1946 }
1947 }
1948
1949 (void)close(pfd[pipe_read]);
1950
1951 /* Unless shadowing, write all successful addresses immediately to the journal
1952 file, to ensure they are recorded asap. For homonymic addresses, use the base
1953 address plus the transport name. Failure to write the journal is panic-worthy,
1954 but don't stop, as it may prove possible subsequently to update the spool file
1955 in order to record the delivery. */
1956
1957 if (!shadowing)
1958 {
1959 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
1960 {
1961 if (addr2->transport_return != OK) continue;
1962
1963 if (testflag(addr2, af_homonym))
1964 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
1965 else
1966 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
1967
1968 /* In the test harness, wait just a bit to let the subprocess finish off
1969 any debug output etc first. */
1970
1971 if (running_in_test_harness) millisleep(300);
1972
1973 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
1974 len = Ustrlen(big_buffer);
1975 if (write(journal_fd, big_buffer, len) != len)
1976 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
1977 big_buffer, strerror(errno));
1978 }
1979
1980 /* Ensure the journal file is pushed out to disk. */
1981
1982 if (fsync(journal_fd) < 0)
1983 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
1984 strerror(errno));
1985 }
1986
1987 /* Wait for the process to finish. If it terminates with a non-zero code,
1988 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
1989 status values of all the addresses as they are. Take care to handle the case
1990 when the subprocess doesn't seem to exist. This has been seen on one system
1991 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
1992 happens, wait() doesn't recognize the termination of child processes. Exim now
1993 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
1994
1995 while ((rc = wait(&status)) != pid)
1996 {
1997 if (rc < 0 && errno == ECHILD) /* Process has vanished */
1998 {
1999 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2000 addr->transport->driver_name);
2001 status = 0;
2002 break;
2003 }
2004 }
2005
2006 if ((status & 0xffff) != 0)
2007 {
2008 int msb = (status >> 8) & 255;
2009 int lsb = status & 255;
2010 int code = (msb == 0)? (lsb & 0x7f) : msb;
2011 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2012 addr->special_action = SPECIAL_FREEZE;
2013 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2014 "status 0x%04x: %s %d",
2015 addr->transport->driver_name,
2016 status,
2017 (msb == 0)? "terminated by signal" : "exit code",
2018 code);
2019 }
2020
2021 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2022
2023 if (addr->special_action == SPECIAL_WARN &&
2024 addr->transport->warn_message != NULL)
2025 {
2026 int fd;
2027 uschar *warn_message;
2028
2029 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2030
2031 warn_message = expand_string(addr->transport->warn_message);
2032 if (warn_message == NULL)
2033 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2034 "message for %s transport): %s", addr->transport->warn_message,
2035 addr->transport->name, expand_string_message);
2036 else
2037 {
2038 pid_t pid = child_open_exim(&fd);
2039 if (pid > 0)
2040 {
2041 FILE *f = fdopen(fd, "wb");
2042 if (errors_reply_to != NULL &&
2043 !contains_header(US"Reply-To", warn_message))
2044 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2045 fprintf(f, "Auto-Submitted: auto-replied\n");
2046 if (!contains_header(US"From", warn_message))
2047 fprintf(f, "From: Mail Delivery System <Mailer-Daemon@%s>\n",
2048 qualify_domain_sender);
2049 fprintf(f, "%s", CS warn_message);
2050
2051 /* Close and wait for child process to complete, without a timeout. */
2052
2053 (void)fclose(f);
2054 (void)child_close(pid, 0);
2055 }
2056 }
2057
2058 addr->special_action = SPECIAL_NONE;
2059 }
2060 }
2061
2062
2063
2064 /*************************************************
2065 * Do local deliveries *
2066 *************************************************/
2067
2068 /* This function processes the list of addresses in addr_local. True local
2069 deliveries are always done one address at a time. However, local deliveries can
2070 be batched up in some cases. Typically this is when writing batched SMTP output
2071 files for use by some external transport mechanism, or when running local
2072 deliveries over LMTP.
2073
2074 Arguments: None
2075 Returns: Nothing
2076 */
2077
2078 static void
2079 do_local_deliveries(void)
2080 {
2081 open_db dbblock;
2082 open_db *dbm_file = NULL;
2083 time_t now = time(NULL);
2084
2085 /* Loop until we have exhausted the supply of local deliveries */
2086
2087 while (addr_local != NULL)
2088 {
2089 time_t delivery_start;
2090 int deliver_time;
2091 address_item *addr2, *addr3, *nextaddr;
2092 int logflags = LOG_MAIN;
2093 int logchar = dont_deliver? '*' : '=';
2094 transport_instance *tp;
2095
2096 /* Pick the first undelivered address off the chain */
2097
2098 address_item *addr = addr_local;
2099 addr_local = addr->next;
2100 addr->next = NULL;
2101
2102 DEBUG(D_deliver|D_transport)
2103 debug_printf("--------> %s <--------\n", addr->address);
2104
2105 /* An internal disaster if there is no transport. Should not occur! */
2106
2107 if ((tp = addr->transport) == NULL)
2108 {
2109 logflags |= LOG_PANIC;
2110 disable_logging = FALSE; /* Jic */
2111 addr->message =
2112 (addr->router != NULL)?
2113 string_sprintf("No transport set by %s router", addr->router->name)
2114 :
2115 string_sprintf("No transport set by system filter");
2116 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2117 continue;
2118 }
2119
2120 /* Check that this base address hasn't previously been delivered to this
2121 transport. The check is necessary at this point to handle homonymic addresses
2122 correctly in cases where the pattern of redirection changes between delivery
2123 attempts. Non-homonymic previous delivery is detected earlier, at routing
2124 time. */
2125
2126 if (previously_transported(addr, FALSE)) continue;
2127
2128 /* There are weird cases where logging is disabled */
2129
2130 disable_logging = tp->disable_logging;
2131
2132 /* Check for batched addresses and possible amalgamation. Skip all the work
2133 if either batch_max <= 1 or there aren't any other addresses for local
2134 delivery. */
2135
2136 if (tp->batch_max > 1 && addr_local != NULL)
2137 {
2138 int batch_count = 1;
2139 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2140 BOOL uses_lp = (testflag(addr, af_pfr) &&
2141 (testflag(addr, af_file) || addr->local_part[0] == '|')) ||
2142 readconf_depends((driver_instance *)tp, US"local_part");
2143 uschar *batch_id = NULL;
2144 address_item **anchor = &addr_local;
2145 address_item *last = addr;
2146 address_item *next;
2147
2148 /* Expand the batch_id string for comparison with other addresses.
2149 Expansion failure suppresses batching. */
2150
2151 if (tp->batch_id != NULL)
2152 {
2153 deliver_set_expansions(addr);
2154 batch_id = expand_string(tp->batch_id);
2155 deliver_set_expansions(NULL);
2156 if (batch_id == NULL)
2157 {
2158 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2159 "in %s transport (%s): %s", tp->name, addr->address,
2160 expand_string_message);
2161 batch_count = tp->batch_max;
2162 }
2163 }
2164
2165 /* Until we reach the batch_max limit, pick off addresses which have the
2166 same characteristics. These are:
2167
2168 same transport
2169 not previously delivered (see comment about 50 lines above)
2170 same local part if the transport's configuration contains $local_part
2171 or if this is a file or pipe delivery from a redirection
2172 same domain if the transport's configuration contains $domain
2173 same errors address
2174 same additional headers
2175 same headers to be removed
2176 same uid/gid for running the transport
2177 same first host if a host list is set
2178 */
2179
2180 while ((next = *anchor) != NULL && batch_count < tp->batch_max)
2181 {
2182 BOOL ok =
2183 tp == next->transport &&
2184 !previously_transported(next, TRUE) &&
2185 (addr->flags & (af_pfr|af_file)) == (next->flags & (af_pfr|af_file)) &&
2186 (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0) &&
2187 (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0) &&
2188 same_strings(next->p.errors_address, addr->p.errors_address) &&
2189 same_headers(next->p.extra_headers, addr->p.extra_headers) &&
2190 same_strings(next->p.remove_headers, addr->p.remove_headers) &&
2191 same_ugid(tp, addr, next) &&
2192 ((addr->host_list == NULL && next->host_list == NULL) ||
2193 (addr->host_list != NULL && next->host_list != NULL &&
2194 Ustrcmp(addr->host_list->name, next->host_list->name) == 0));
2195
2196 /* If the transport has a batch_id setting, batch_id will be non-NULL
2197 from the expansion outside the loop. Expand for this address and compare.
2198 Expansion failure makes this address ineligible for batching. */
2199
2200 if (ok && batch_id != NULL)
2201 {
2202 uschar *bid;
2203 address_item *save_nextnext = next->next;
2204 next->next = NULL; /* Expansion for a single address */
2205 deliver_set_expansions(next);
2206 next->next = save_nextnext;
2207 bid = expand_string(tp->batch_id);
2208 deliver_set_expansions(NULL);
2209 if (bid == NULL)
2210 {
2211 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2212 "in %s transport (%s): %s", tp->name, next->address,
2213 expand_string_message);
2214 ok = FALSE;
2215 }
2216 else ok = (Ustrcmp(batch_id, bid) == 0);
2217 }
2218
2219 /* Take address into batch if OK. */
2220
2221 if (ok)
2222 {
2223 *anchor = next->next; /* Include the address */
2224 next->next = NULL;
2225 last->next = next;
2226 last = next;
2227 batch_count++;
2228 }
2229 else anchor = &(next->next); /* Skip the address */
2230 }
2231 }
2232
2233 /* We now have one or more addresses that can be delivered in a batch. Check
2234 whether the transport is prepared to accept a message of this size. If not,
2235 fail them all forthwith. If the expansion fails, or does not yield an
2236 integer, defer delivery. */
2237
2238 if (tp->message_size_limit != NULL)
2239 {
2240 int rc = check_message_size(tp, addr);
2241 if (rc != OK)
2242 {
2243 replicate_status(addr);
2244 while (addr != NULL)
2245 {
2246 addr2 = addr->next;
2247 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2248 addr = addr2;
2249 }
2250 continue; /* With next batch of addresses */
2251 }
2252 }
2253
2254 /* If we are not running the queue, or if forcing, all deliveries will be
2255 attempted. Otherwise, we must respect the retry times for each address. Even
2256 when not doing this, we need to set up the retry key string, and determine
2257 whether a retry record exists, because after a successful delivery, a delete
2258 retry item must be set up. Keep the retry database open only for the duration
2259 of these checks, rather than for all local deliveries, because some local
2260 deliveries (e.g. to pipes) can take a substantial time. */
2261
2262 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
2263 if (dbm_file == NULL)
2264 {
2265 DEBUG(D_deliver|D_retry|D_hints_lookup)
2266 debug_printf("no retry data available\n");
2267 }
2268
2269 addr2 = addr;
2270 addr3 = NULL;
2271 while (addr2 != NULL)
2272 {
2273 BOOL ok = TRUE; /* to deliver this address */
2274 uschar *retry_key;
2275
2276 /* Set up the retry key to include the domain or not, and change its
2277 leading character from "R" to "T". Must make a copy before doing this,
2278 because the old key may be pointed to from a "delete" retry item after
2279 a routing delay. */
2280
2281 retry_key = string_copy(
2282 (tp->retry_use_local_part)? addr2->address_retry_key :
2283 addr2->domain_retry_key);
2284 *retry_key = 'T';
2285
2286 /* Inspect the retry data. If there is no hints file, delivery happens. */
2287
2288 if (dbm_file != NULL)
2289 {
2290 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2291
2292 /* If there is no retry record, delivery happens. If there is,
2293 remember it exists so it can be deleted after a successful delivery. */
2294
2295 if (retry_record != NULL)
2296 {
2297 setflag(addr2, af_lt_retry_exists);
2298
2299 /* A retry record exists for this address. If queue running and not
2300 forcing, inspect its contents. If the record is too old, or if its
2301 retry time has come, or if it has passed its cutoff time, delivery
2302 will go ahead. */
2303
2304 DEBUG(D_retry)
2305 {
2306 debug_printf("retry record exists: age=%s ",
2307 readconf_printtime(now - retry_record->time_stamp));
2308 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2309 debug_printf(" time to retry = %s expired = %d\n",
2310 readconf_printtime(retry_record->next_try - now),
2311 retry_record->expired);
2312 }
2313
2314 if (queue_running && !deliver_force)
2315 {
2316 ok = (now - retry_record->time_stamp > retry_data_expire) ||
2317 (now >= retry_record->next_try) ||
2318 retry_record->expired;
2319
2320 /* If we haven't reached the retry time, there is one more check
2321 to do, which is for the ultimate address timeout. */
2322
2323 if (!ok)
2324 {
2325 retry_config *retry =
2326 retry_find_config(retry_key+2, addr2->domain,
2327 retry_record->basic_errno,
2328 retry_record->more_errno);
2329
2330 DEBUG(D_deliver|D_retry)
2331 {
2332 debug_printf("retry time not reached for %s: "
2333 "checking ultimate address timeout\n", addr2->address);
2334 debug_printf(" now=%d first_failed=%d next_try=%d expired=%d\n",
2335 (int)now, (int)retry_record->first_failed,
2336 (int)retry_record->next_try, retry_record->expired);
2337 }
2338
2339 if (retry != NULL && retry->rules != NULL)
2340 {
2341 retry_rule *last_rule;
2342 for (last_rule = retry->rules;
2343 last_rule->next != NULL;
2344 last_rule = last_rule->next);
2345 DEBUG(D_deliver|D_retry)
2346 debug_printf(" received_time=%d diff=%d timeout=%d\n",
2347 received_time, (int)now - received_time, last_rule->timeout);
2348 if (now - received_time > last_rule->timeout) ok = TRUE;
2349 }
2350 else
2351 {
2352 DEBUG(D_deliver|D_retry)
2353 debug_printf("no retry rule found: assume timed out\n");
2354 ok = TRUE; /* No rule => timed out */
2355 }
2356
2357 DEBUG(D_deliver|D_retry)
2358 {
2359 if (ok) debug_printf("on queue longer than maximum retry for "
2360 "address - allowing delivery\n");
2361 }
2362 }
2363 }
2364 }
2365 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2366 }
2367
2368 /* This address is to be delivered. Leave it on the chain. */
2369
2370 if (ok)
2371 {
2372 addr3 = addr2;
2373 addr2 = addr2->next;
2374 }
2375
2376 /* This address is to be deferred. Take it out of the chain, and
2377 post-process it as complete. Must take it out of the chain first,
2378 because post processing puts it on another chain. */
2379
2380 else
2381 {
2382 address_item *this = addr2;
2383 this->message = US"Retry time not yet reached";
2384 this->basic_errno = ERRNO_LRETRY;
2385 if (addr3 == NULL) addr2 = addr = addr2->next;
2386 else addr2 = addr3->next = addr2->next;
2387 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2388 }
2389 }
2390
2391 if (dbm_file != NULL) dbfn_close(dbm_file);
2392
2393 /* If there are no addresses left on the chain, they all deferred. Loop
2394 for the next set of addresses. */
2395
2396 if (addr == NULL) continue;
2397
2398 /* So, finally, we do have some addresses that can be passed to the
2399 transport. Before doing so, set up variables that are relevant to a
2400 single delivery. */
2401
2402 deliver_set_expansions(addr);
2403 delivery_start = time(NULL);
2404 deliver_local(addr, FALSE);
2405 deliver_time = (int)(time(NULL) - delivery_start);
2406
2407 /* If a shadow transport (which must perforce be another local transport), is
2408 defined, and its condition is met, we must pass the message to the shadow
2409 too, but only those addresses that succeeded. We do this by making a new
2410 chain of addresses - also to keep the original chain uncontaminated. We must
2411 use a chain rather than doing it one by one, because the shadow transport may
2412 batch.
2413
2414 NOTE: if the condition fails because of a lookup defer, there is nothing we
2415 can do! */
2416
2417 if (tp->shadow != NULL &&
2418 (tp->shadow_condition == NULL ||
2419 expand_check_condition(tp->shadow_condition, tp->name, US"transport")))
2420 {
2421 transport_instance *stp;
2422 address_item *shadow_addr = NULL;
2423 address_item **last = &shadow_addr;
2424
2425 for (stp = transports; stp != NULL; stp = stp->next)
2426 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
2427
2428 if (stp == NULL)
2429 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
2430 tp->shadow);
2431
2432 /* Pick off the addresses that have succeeded, and make clones. Put into
2433 the shadow_message field a pointer to the shadow_message field of the real
2434 address. */
2435
2436 else for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2437 {
2438 if (addr2->transport_return != OK) continue;
2439 addr3 = store_get(sizeof(address_item));
2440 *addr3 = *addr2;
2441 addr3->next = NULL;
2442 addr3->shadow_message = (uschar *)(&(addr2->shadow_message));
2443 addr3->transport = stp;
2444 addr3->transport_return = DEFER;
2445 addr3->return_filename = NULL;
2446 addr3->return_file = -1;
2447 *last = addr3;
2448 last = &(addr3->next);
2449 }
2450
2451 /* If we found any addresses to shadow, run the delivery, and stick any
2452 message back into the shadow_message field in the original. */
2453
2454 if (shadow_addr != NULL)
2455 {
2456 int save_count = transport_count;
2457
2458 DEBUG(D_deliver|D_transport)
2459 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2460 deliver_local(shadow_addr, TRUE);
2461
2462 for(; shadow_addr != NULL; shadow_addr = shadow_addr->next)
2463 {
2464 int sresult = shadow_addr->transport_return;
2465 *((uschar **)(shadow_addr->shadow_message)) = (sresult == OK)?
2466 string_sprintf(" ST=%s", stp->name) :
2467 string_sprintf(" ST=%s (%s%s%s)", stp->name,
2468 (shadow_addr->basic_errno <= 0)?
2469 US"" : US strerror(shadow_addr->basic_errno),
2470 (shadow_addr->basic_errno <= 0 || shadow_addr->message == NULL)?
2471 US"" : US": ",
2472 (shadow_addr->message != NULL)? shadow_addr->message :
2473 (shadow_addr->basic_errno <= 0)? US"unknown error" : US"");
2474
2475 DEBUG(D_deliver|D_transport)
2476 debug_printf("%s shadow transport returned %s for %s\n",
2477 stp->name,
2478 (sresult == OK)? "OK" :
2479 (sresult == DEFER)? "DEFER" :
2480 (sresult == FAIL)? "FAIL" :
2481 (sresult == PANIC)? "PANIC" : "?",
2482 shadow_addr->address);
2483 }
2484
2485 DEBUG(D_deliver|D_transport)
2486 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2487
2488 transport_count = save_count; /* Restore original transport count */
2489 }
2490 }
2491
2492 /* Cancel the expansions that were set up for the delivery. */
2493
2494 deliver_set_expansions(NULL);
2495
2496 /* Now we can process the results of the real transport. We must take each
2497 address off the chain first, because post_process_one() puts it on another
2498 chain. */
2499
2500 for (addr2 = addr; addr2 != NULL; addr2 = nextaddr)
2501 {
2502 int result = addr2->transport_return;
2503 nextaddr = addr2->next;
2504
2505 DEBUG(D_deliver|D_transport)
2506 debug_printf("%s transport returned %s for %s\n",
2507 tp->name,
2508 (result == OK)? "OK" :
2509 (result == DEFER)? "DEFER" :
2510 (result == FAIL)? "FAIL" :
2511 (result == PANIC)? "PANIC" : "?",
2512 addr2->address);
2513
2514 /* If there is a retry_record, or if delivery is deferred, build a retry
2515 item for setting a new retry time or deleting the old retry record from
2516 the database. These items are handled all together after all addresses
2517 have been handled (so the database is open just for a short time for
2518 updating). */
2519
2520 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
2521 {
2522 int flags = (result == DEFER)? 0 : rf_delete;
2523 uschar *retry_key = string_copy((tp->retry_use_local_part)?
2524 addr2->address_retry_key : addr2->domain_retry_key);
2525 *retry_key = 'T';
2526 retry_add_item(addr2, retry_key, flags);
2527 }
2528
2529 /* Done with this address */
2530
2531 if (result == OK) addr2->more_errno = deliver_time;
2532 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
2533
2534 /* If a pipe delivery generated text to be sent back, the result may be
2535 changed to FAIL, and we must copy this for subsequent addresses in the
2536 batch. */
2537
2538 if (addr2->transport_return != result)
2539 {
2540 for (addr3 = nextaddr; addr3 != NULL; addr3 = addr3->next)
2541 {
2542 addr3->transport_return = addr2->transport_return;
2543 addr3->basic_errno = addr2->basic_errno;
2544 addr3->message = addr2->message;
2545 }
2546 result = addr2->transport_return;
2547 }
2548
2549 /* Whether or not the result was changed to FAIL, we need to copy the
2550 return_file value from the first address into all the addresses of the
2551 batch, so they are all listed in the error message. */
2552
2553 addr2->return_file = addr->return_file;
2554
2555 /* Change log character for recording successful deliveries. */
2556
2557 if (result == OK) logchar = '-';
2558 }
2559 } /* Loop back for next batch of addresses */
2560 }
2561
2562
2563
2564
2565 /*************************************************
2566 * Sort remote deliveries *
2567 *************************************************/
2568
2569 /* This function is called if remote_sort_domains is set. It arranges that the
2570 chain of addresses for remote deliveries is ordered according to the strings
2571 specified. Try to make this shuffling reasonably efficient by handling
2572 sequences of addresses rather than just single ones.
2573
2574 Arguments: None
2575 Returns: Nothing
2576 */
2577
2578 static void
2579 sort_remote_deliveries(void)
2580 {
2581 int sep = 0;
2582 address_item **aptr = &addr_remote;
2583 uschar *listptr = remote_sort_domains;
2584 uschar *pattern;
2585 uschar patbuf[256];
2586
2587 while (*aptr != NULL &&
2588 (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
2589 != NULL)
2590 {
2591 address_item *moved = NULL;
2592 address_item **bptr = &moved;
2593
2594 while (*aptr != NULL)
2595 {
2596 address_item **next;
2597 deliver_domain = (*aptr)->domain; /* set $domain */
2598 if (match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1,
2599 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
2600 {
2601 aptr = &((*aptr)->next);
2602 continue;
2603 }
2604
2605 next = &((*aptr)->next);
2606 while (*next != NULL &&
2607 (deliver_domain = (*next)->domain, /* Set $domain */
2608 match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1,
2609 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK)
2610 next = &((*next)->next);
2611
2612 /* If the batch of non-matchers is at the end, add on any that were
2613 extracted further up the chain, and end this iteration. Otherwise,
2614 extract them from the chain and hang on the moved chain. */
2615
2616 if (*next == NULL)
2617 {
2618 *next = moved;
2619 break;
2620 }
2621
2622 *bptr = *aptr;
2623 *aptr = *next;
2624 *next = NULL;
2625 bptr = next;
2626 aptr = &((*aptr)->next);
2627 }
2628
2629 /* If the loop ended because the final address matched, *aptr will
2630 be NULL. Add on to the end any extracted non-matching addresses. If
2631 *aptr is not NULL, the loop ended via "break" when *next is null, that
2632 is, there was a string of non-matching addresses at the end. In this
2633 case the extracted addresses have already been added on the end. */
2634
2635 if (*aptr == NULL) *aptr = moved;
2636 }
2637
2638 DEBUG(D_deliver)
2639 {
2640 address_item *addr;
2641 debug_printf("remote addresses after sorting:\n");
2642 for (addr = addr_remote; addr != NULL; addr = addr->next)
2643 debug_printf(" %s\n", addr->address);
2644 }
2645 }
2646
2647
2648
2649 /*************************************************
2650 * Read from pipe for remote delivery subprocess *
2651 *************************************************/
2652
2653 /* This function is called when the subprocess is complete, but can also be
2654 called before it is complete, in order to empty a pipe that is full (to prevent
2655 deadlock). It must therefore keep track of its progress in the parlist data
2656 block.
2657
2658 We read the pipe to get the delivery status codes and a possible error message
2659 for each address, optionally preceded by unusability data for the hosts and
2660 also by optional retry data.
2661
2662 Read in large chunks into the big buffer and then scan through, interpreting
2663 the data therein. In most cases, only a single read will be necessary. No
2664 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
2665 that we read the next chunk when there is less than 2500 bytes left in the
2666 non-final chunk, we can assume each item is complete in the buffer before
2667 handling it. Each item is written using a single write(), which is atomic for
2668 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
2669 often bigger) so even if we are reading while the subprocess is still going, we
2670 should never have only a partial item in the buffer.
2671
2672 Argument:
2673 poffset the offset of the parlist item
2674 eop TRUE if the process has completed
2675
2676 Returns: TRUE if the terminating 'Z' item has been read,
2677 or there has been a disaster (i.e. no more data needed);
2678 FALSE otherwise
2679 */
2680
2681 static BOOL
2682 par_read_pipe(int poffset, BOOL eop)
2683 {
2684 host_item *h;
2685 pardata *p = parlist + poffset;
2686 address_item *addrlist = p->addrlist;
2687 address_item *addr = p->addr;
2688 pid_t pid = p->pid;
2689 int fd = p->fd;
2690 uschar *endptr = big_buffer;
2691 uschar *ptr = endptr;
2692 uschar *msg = p->msg;
2693 BOOL done = p->done;
2694 BOOL unfinished = TRUE;
2695
2696 /* Loop through all items, reading from the pipe when necessary. The pipe
2697 is set up to be non-blocking, but there are two different Unix mechanisms in
2698 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
2699 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
2700 which returns 0 for both end of file and no more data. We distinguish the
2701 two cases by taking 0 as end of file only when we know the process has
2702 completed.
2703
2704 Each separate item is written to the pipe in a single write(), and as they are
2705 all short items, the writes will all be atomic and we should never find
2706 ourselves in the position of having read an incomplete item. "Short" in this
2707 case can mean up to about 1K in the case when there is a long error message
2708 associated with an address. */
2709
2710 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
2711 (int)p->pid, eop? "ended" : "not ended");
2712
2713 while (!done)
2714 {
2715 retry_item *r, **rp;
2716 int remaining = endptr - ptr;
2717
2718 /* Read (first time) or top up the chars in the buffer if necessary.
2719 There will be only one read if we get all the available data (i.e. don't
2720 fill the buffer completely). */
2721
2722 if (remaining < 2500 && unfinished)
2723 {
2724 int len;
2725 int available = big_buffer_size - remaining;
2726
2727 if (remaining > 0) memmove(big_buffer, ptr, remaining);
2728
2729 ptr = big_buffer;
2730 endptr = big_buffer + remaining;
2731 len = read(fd, endptr, available);
2732
2733 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
2734
2735 /* If the result is EAGAIN and the process is not complete, just
2736 stop reading any more and process what we have already. */
2737
2738 if (len < 0)
2739 {
2740 if (!eop && errno == EAGAIN) len = 0; else
2741 {
2742 msg = string_sprintf("failed to read pipe from transport process "
2743 "%d for transport %s: %s", pid, addr->transport->driver_name,
2744 strerror(errno));
2745 break;
2746 }
2747 }
2748
2749 /* If the length is zero (eof or no-more-data), just process what we
2750 already have. Note that if the process is still running and we have
2751 read all the data in the pipe (but less that "available") then we
2752 won't read any more, as "unfinished" will get set FALSE. */
2753
2754 endptr += len;
2755 unfinished = len == available;
2756 }
2757
2758 /* If we are at the end of the available data, exit the loop. */
2759
2760 if (ptr >= endptr) break;
2761
2762 /* Handle each possible type of item, assuming the complete item is
2763 available in store. */
2764
2765 switch (*ptr++)
2766 {
2767 /* Host items exist only if any hosts were marked unusable. Match
2768 up by checking the IP address. */
2769
2770 case 'H':
2771 for (h = addrlist->host_list; h != NULL; h = h->next)
2772 {
2773 if (h->address == NULL || Ustrcmp(h->address, ptr+2) != 0) continue;
2774 h->status = ptr[0];
2775 h->why = ptr[1];
2776 }
2777 ptr += 2;
2778 while (*ptr++);
2779 break;
2780
2781 /* Retry items are sent in a preceding R item for each address. This is
2782 kept separate to keep each message short enough to guarantee it won't
2783 be split in the pipe. Hopefully, in the majority of cases, there won't in
2784 fact be any retry items at all.
2785
2786 The complete set of retry items might include an item to delete a
2787 routing retry if there was a previous routing delay. However, routing
2788 retries are also used when a remote transport identifies an address error.
2789 In that case, there may also be an "add" item for the same key. Arrange
2790 that a "delete" item is dropped in favour of an "add" item. */
2791
2792 case 'R':
2793 if (addr == NULL) goto ADDR_MISMATCH;
2794
2795 DEBUG(D_deliver|D_retry)
2796 debug_printf("reading retry information for %s from subprocess\n",
2797 ptr+1);
2798
2799 /* Cut out any "delete" items on the list. */
2800
2801 for (rp = &(addr->retries); (r = *rp) != NULL; rp = &(r->next))
2802 {
2803 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
2804 {
2805 if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */
2806 *rp = r->next; /* Excise a delete item */
2807 DEBUG(D_deliver|D_retry)
2808 debug_printf(" existing delete item dropped\n");
2809 }
2810 }
2811
2812 /* We want to add a delete item only if there is no non-delete item;
2813 however we still have to step ptr through the data. */
2814
2815 if (r == NULL || (*ptr & rf_delete) == 0)
2816 {
2817 r = store_get(sizeof(retry_item));
2818 r->next = addr->retries;
2819 addr->retries = r;
2820 r->flags = *ptr++;
2821 r->key = string_copy(ptr);
2822 while (*ptr++);
2823 memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno));
2824 ptr += sizeof(r->basic_errno);
2825 memcpy(&(r->more_errno), ptr, sizeof(r->more_errno));
2826 ptr += sizeof(r->more_errno);
2827 r->message = (*ptr)? string_copy(ptr) : NULL;
2828 DEBUG(D_deliver|D_retry)
2829 debug_printf(" added %s item\n",
2830 ((r->flags & rf_delete) == 0)? "retry" : "delete");
2831 }
2832
2833 else
2834 {
2835 DEBUG(D_deliver|D_retry)
2836 debug_printf(" delete item not added: non-delete item exists\n");
2837 ptr++;
2838 while(*ptr++);
2839 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
2840 }
2841
2842 while(*ptr++);
2843 break;
2844
2845 /* Put the amount of data written into the parlist block */
2846
2847 case 'S':
2848 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
2849 ptr += sizeof(transport_count);
2850 break;
2851
2852 /* Address items are in the order of items on the address chain. We
2853 remember the current address value in case this function is called
2854 several times to empty the pipe in stages. Information about delivery
2855 over TLS is sent in a preceding X item for each address. We don't put
2856 it in with the other info, in order to keep each message short enough to
2857 guarantee it won't be split in the pipe. */
2858
2859 #ifdef SUPPORT_TLS
2860 case 'X':
2861 if (addr == NULL) goto ADDR_MISMATCH; /* Below, in 'A' handler */
2862 addr->cipher = (*ptr)? string_copy(ptr) : NULL;
2863 while (*ptr++);
2864 addr->peerdn = (*ptr)? string_copy(ptr) : NULL;
2865 while (*ptr++);
2866 break;
2867 #endif
2868
2869 case 'A':
2870 if (addr == NULL)
2871 {
2872 ADDR_MISMATCH:
2873 msg = string_sprintf("address count mismatch for data read from pipe "
2874 "for transport process %d for transport %s", pid,
2875 addrlist->transport->driver_name);
2876 done = TRUE;
2877 break;
2878 }
2879
2880 addr->transport_return = *ptr++;
2881 addr->special_action = *ptr++;
2882 memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno));
2883 ptr += sizeof(addr->basic_errno);
2884 memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno));
2885 ptr += sizeof(addr->more_errno);
2886 memcpy(&(addr->flags), ptr, sizeof(addr->flags));
2887 ptr += sizeof(addr->flags);
2888 addr->message = (*ptr)? string_copy(ptr) : NULL;
2889 while(*ptr++);
2890 addr->user_message = (*ptr)? string_copy(ptr) : NULL;
2891 while(*ptr++);
2892
2893 /* Always two strings for host information, followed by the port number */
2894
2895 if (*ptr != 0)
2896 {
2897 h = store_get(sizeof(host_item));
2898 h->name = string_copy(ptr);
2899 while (*ptr++);
2900 h->address = string_copy(ptr);
2901 while(*ptr++);
2902 memcpy(&(h->port), ptr, sizeof(h->port));
2903 ptr += sizeof(h->port);
2904 addr->host_used = h;
2905 }
2906 else ptr++;
2907
2908 /* Finished with this address */
2909
2910 addr = addr->next;
2911 break;
2912
2913 /* Z marks the logical end of the data. It is followed by '0' if
2914 continue_transport was NULL at the end of transporting, otherwise '1'.
2915 We need to know when it becomes NULL during a delivery down a passed SMTP
2916 channel so that we don't try to pass anything more down it. Of course, for
2917 most normal messages it will remain NULL all the time. */
2918
2919 case 'Z':
2920 if (*ptr == '0')
2921 {
2922 continue_transport = NULL;
2923 continue_hostname = NULL;
2924 }
2925 done = TRUE;
2926 DEBUG(D_deliver) debug_printf("Z%c item read\n", *ptr);
2927 break;
2928
2929 /* Anything else is a disaster. */
2930
2931 default:
2932 msg = string_sprintf("malformed data (%d) read from pipe for transport "
2933 "process %d for transport %s", ptr[-1], pid,
2934 addr->transport->driver_name);
2935 done = TRUE;
2936 break;
2937 }
2938 }
2939
2940 /* The done flag is inspected externally, to determine whether or not to
2941 call the function again when the process finishes. */
2942
2943 p->done = done;
2944
2945 /* If the process hadn't finished, and we haven't seen the end of the data
2946 or suffered a disaster, update the rest of the state, and return FALSE to
2947 indicate "not finished". */
2948
2949 if (!eop && !done)
2950 {
2951 p->addr = addr;
2952 p->msg = msg;
2953 return FALSE;
2954 }
2955
2956 /* Close our end of the pipe, to prevent deadlock if the far end is still
2957 pushing stuff into it. */
2958
2959 (void)close(fd);
2960 p->fd = -1;
2961
2962 /* If we have finished without error, but haven't had data for every address,
2963 something is wrong. */
2964
2965 if (msg == NULL && addr != NULL)
2966 msg = string_sprintf("insufficient address data read from pipe "
2967 "for transport process %d for transport %s", pid,
2968 addr->transport->driver_name);
2969
2970 /* If an error message is set, something has gone wrong in getting back
2971 the delivery data. Put the message into each address and freeze it. */
2972
2973 if (msg != NULL)
2974 {
2975 for (addr = addrlist; addr != NULL; addr = addr->next)
2976 {
2977 addr->transport_return = DEFER;
2978 addr->special_action = SPECIAL_FREEZE;
2979 addr->message = msg;
2980 }
2981 }
2982
2983 /* Return TRUE to indicate we have got all we need from this process, even
2984 if it hasn't actually finished yet. */
2985
2986 return TRUE;
2987 }
2988
2989
2990
2991 /*************************************************
2992 * Post-process a set of remote addresses *
2993 *************************************************/
2994
2995 /* Do what has to be done immediately after a remote delivery for each set of
2996 addresses, then re-write the spool if necessary. Note that post_process_one
2997 puts the address on an appropriate queue; hence we must fish off the next
2998 one first. This function is also called if there is a problem with setting
2999 up a subprocess to do a remote delivery in parallel. In this case, the final
3000 argument contains a message, and the action must be forced to DEFER.
3001
3002 Argument:
3003 addr pointer to chain of address items
3004 logflags flags for logging
3005 msg NULL for normal cases; -> error message for unexpected problems
3006 fallback TRUE if processing fallback hosts
3007
3008 Returns: nothing
3009 */
3010
3011 static void
3012 remote_post_process(address_item *addr, int logflags, uschar *msg,
3013 BOOL fallback)
3014 {
3015 host_item *h;
3016
3017 /* If any host addresses were found to be unusable, add them to the unusable
3018 tree so that subsequent deliveries don't try them. */
3019
3020 for (h = addr->host_list; h != NULL; h = h->next)
3021 {
3022 if (h->address == NULL) continue;
3023 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3024 }
3025
3026 /* Now handle each address on the chain. The transport has placed '=' or '-'
3027 into the special_action field for each successful delivery. */
3028
3029 while (addr != NULL)
3030 {
3031 address_item *next = addr->next;
3032
3033 /* If msg == NULL (normal processing) and the result is DEFER and we are
3034 processing the main hosts and there are fallback hosts available, put the
3035 address on the list for fallback delivery. */
3036
3037 if (addr->transport_return == DEFER &&
3038 addr->fallback_hosts != NULL &&
3039 !fallback &&
3040 msg == NULL)
3041 {
3042 addr->host_list = addr->fallback_hosts;
3043 addr->next = addr_fallback;
3044 addr_fallback = addr;
3045 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3046 }
3047
3048 /* If msg is set (=> unexpected problem), set it in the address before
3049 doing the ordinary post processing. */
3050
3051 else
3052 {
3053 if (msg != NULL)
3054 {
3055 addr->message = msg;
3056 addr->transport_return = DEFER;
3057 }
3058 (void)post_process_one(addr, addr->transport_return, logflags,
3059 DTYPE_TRANSPORT, addr->special_action);
3060 }
3061
3062 /* Next address */
3063
3064 addr = next;
3065 }
3066
3067 /* If we have just delivered down a passed SMTP channel, and that was
3068 the last address, the channel will have been closed down. Now that
3069 we have logged that delivery, set continue_sequence to 1 so that
3070 any subsequent deliveries don't get "*" incorrectly logged. */
3071
3072 if (continue_transport == NULL) continue_sequence = 1;
3073 }
3074
3075
3076
3077 /*************************************************
3078 * Wait for one remote delivery subprocess *
3079 *************************************************/
3080
3081 /* This function is called while doing remote deliveries when either the
3082 maximum number of processes exist and we need one to complete so that another
3083 can be created, or when waiting for the last ones to complete. It must wait for
3084 the completion of one subprocess, empty the control block slot, and return a
3085 pointer to the address chain.
3086
3087 Arguments: none
3088 Returns: pointer to the chain of addresses handled by the process;
3089 NULL if no subprocess found - this is an unexpected error
3090 */
3091
3092 static address_item *
3093 par_wait(void)
3094 {
3095 int poffset, status;
3096 address_item *addr, *addrlist;
3097 pid_t pid;
3098
3099 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3100 "to finish", message_id);
3101
3102 /* Loop until either a subprocess completes, or there are no subprocesses in
3103 existence - in which case give an error return. We cannot proceed just by
3104 waiting for a completion, because a subprocess may have filled up its pipe, and
3105 be waiting for it to be emptied. Therefore, if no processes have finished, we
3106 wait for one of the pipes to acquire some data by calling select(), with a
3107 timeout just in case.
3108
3109 The simple approach is just to iterate after reading data from a ready pipe.
3110 This leads to non-ideal behaviour when the subprocess has written its final Z
3111 item, closed the pipe, and is in the process of exiting (the common case). A
3112 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3113 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3114 actually finished.
3115
3116 To avoid this, if all the data that is needed has been read from a subprocess
3117 after select(), an explicit wait() for it is done. We know that all it is doing
3118 is writing to the pipe and then exiting, so the wait should not be long.
3119
3120 The non-blocking waitpid() is to some extent just insurance; if we could
3121 reliably detect end-of-file on the pipe, we could always know when to do a
3122 blocking wait() for a completed process. However, because some systems use
3123 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3124 use code that functions without the need to recognize EOF.
3125
3126 There's a double loop here just in case we end up with a process that is not in
3127 the list of remote delivery processes. Something has obviously gone wrong if
3128 this is the case. (For example, a process that is incorrectly left over from
3129 routing or local deliveries might be found.) The damage can be minimized by
3130 looping back and looking for another process. If there aren't any, the error
3131 return will happen. */
3132
3133 for (;;) /* Normally we do not repeat this loop */
3134 {
3135 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3136 {
3137 struct timeval tv;
3138 fd_set select_pipes;
3139 int maxpipe, readycount;
3140
3141 /* A return value of -1 can mean several things. If errno != ECHILD, it
3142 either means invalid options (which we discount), or that this process was
3143 interrupted by a signal. Just loop to try the waitpid() again.
3144
3145 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3146 in existence. This should never happen, and is an unexpected error.
3147 However, there is a nasty complication when running under Linux. If "strace
3148 -f" is being used under Linux to trace this process and its children,
3149 subprocesses are "stolen" from their parents and become the children of the
3150 tracing process. A general wait such as the one we've just obeyed returns
3151 as if there are no children while subprocesses are running. Once a
3152 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3153 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3154 palliative.
3155
3156 This does not happen using "truss" on Solaris, nor (I think) with other
3157 tracing facilities on other OS. It seems to be specific to Linux.
3158
3159 What we do to get round this is to use kill() to see if any of our
3160 subprocesses are still in existence. If kill() gives an OK return, we know
3161 it must be for one of our processes - it can't be for a re-use of the pid,
3162 because if our process had finished, waitpid() would have found it. If any
3163 of our subprocesses are in existence, we proceed to use select() as if
3164 waitpid() had returned zero. I think this is safe. */
3165
3166 if (pid < 0)
3167 {
3168 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3169
3170 DEBUG(D_deliver)
3171 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3172 "for process existence\n");
3173
3174 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3175 {
3176 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3177 {
3178 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3179 "stolen by strace\n", (int)pid);
3180 break; /* With poffset set */
3181 }
3182 }
3183
3184 if (poffset >= remote_max_parallel)
3185 {
3186 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3187 return NULL; /* This is the error return */
3188 }
3189 }
3190
3191 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3192 been handled above. A return value of zero means that there is at least one
3193 subprocess, but there are no completed subprocesses. See if any pipes are
3194 ready with any data for reading. */
3195
3196 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3197
3198 maxpipe = 0;
3199 FD_ZERO(&select_pipes);
3200 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3201 {
3202 if (parlist[poffset].pid != 0)
3203 {
3204 int fd = parlist[poffset].fd;
3205 FD_SET(fd, &select_pipes);
3206 if (fd > maxpipe) maxpipe = fd;
3207 }
3208 }
3209
3210 /* Stick in a 60-second timeout, just in case. */
3211
3212 tv.tv_sec = 60;
3213 tv.tv_usec = 0;
3214
3215 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3216 NULL, NULL, &tv);
3217
3218 /* Scan through the pipes and read any that are ready; use the count
3219 returned by select() to stop when there are no more. Select() can return
3220 with no processes (e.g. if interrupted). This shouldn't matter.
3221
3222 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3223 read, or there was a disaster. In either case, we are finished with this
3224 process. Do an explicit wait() for the process and break the main loop if
3225 it succeeds.
3226
3227 It turns out that we have to deal with the case of an interrupted system
3228 call, which can happen on some operating systems if the signal handling is
3229 set up to do that by default. */
3230
3231 for (poffset = 0;
3232 readycount > 0 && poffset < remote_max_parallel;
3233 poffset++)
3234 {
3235 if ((pid = parlist[poffset].pid) != 0 &&
3236 FD_ISSET(parlist[poffset].fd, &select_pipes))
3237 {
3238 readycount--;
3239 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3240 {
3241 for (;;) /* Loop for signals */
3242 {
3243 pid_t endedpid = waitpid(pid, &status, 0);
3244 if (endedpid == pid) goto PROCESS_DONE;
3245 if (endedpid != (pid_t)(-1) || errno != EINTR)
3246 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3247 "%d (errno = %d) from waitpid() for process %d",
3248 (int)endedpid, errno, (int)pid);
3249 }
3250 }
3251 }
3252 }
3253
3254 /* Now go back and look for a completed subprocess again. */
3255 }
3256
3257 /* A completed process was detected by the non-blocking waitpid(). Find the
3258 data block that corresponds to this subprocess. */
3259
3260 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3261 if (pid == parlist[poffset].pid) break;
3262
3263 /* Found the data block; this is a known remote delivery process. We don't
3264 need to repeat the outer loop. This should be what normally happens. */
3265
3266 if (poffset < remote_max_parallel) break;
3267
3268 /* This situation is an error, but it's probably better to carry on looking
3269 for another process than to give up (as we used to do). */
3270
3271 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
3272 "transport process list", pid);
3273 } /* End of the "for" loop */
3274
3275 /* Come here when all the data was completely read after a select(), and
3276 the process in pid has been wait()ed for. */
3277
3278 PROCESS_DONE:
3279
3280 DEBUG(D_deliver)
3281 {
3282 if (status == 0)
3283 debug_printf("remote delivery process %d ended\n", (int)pid);
3284 else
3285 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
3286 status);
3287 }
3288
3289 set_process_info("delivering %s", message_id);
3290
3291 /* Get the chain of processed addresses */
3292
3293 addrlist = parlist[poffset].addrlist;
3294
3295 /* If the process did not finish cleanly, record an error and freeze (except
3296 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3297 in case the delivery did actually happen. */
3298
3299 if ((status & 0xffff) != 0)
3300 {
3301 uschar *msg;
3302 int msb = (status >> 8) & 255;
3303 int lsb = status & 255;
3304 int code = (msb == 0)? (lsb & 0x7f) : msb;
3305
3306 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
3307 "%s %d",
3308 addrlist->transport->driver_name,
3309 status,
3310 (msb == 0)? "terminated by signal" : "exit code",
3311 code);
3312
3313 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
3314 addrlist->special_action = SPECIAL_FREEZE;
3315
3316 for (addr = addrlist; addr != NULL; addr = addr->next)
3317 {
3318 addr->transport_return = DEFER;
3319 addr->message = msg;
3320 }
3321
3322 remove_journal = FALSE;
3323 }
3324
3325 /* Else complete reading the pipe to get the result of the delivery, if all
3326 the data has not yet been obtained. */
3327
3328 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
3329
3330 /* Put the data count and return path into globals, mark the data slot unused,
3331 decrement the count of subprocesses, and return the address chain. */
3332
3333 transport_count = parlist[poffset].transport_count;
3334 used_return_path = parlist[poffset].return_path;
3335 parlist[poffset].pid = 0;
3336 parcount--;
3337 return addrlist;
3338 }
3339
3340
3341
3342 /*************************************************
3343 * Wait for subprocesses and post-process *
3344 *************************************************/
3345
3346 /* This function waits for subprocesses until the number that are still running
3347 is below a given threshold. For each complete subprocess, the addresses are
3348 post-processed. If we can't find a running process, there is some shambles.
3349 Better not bomb out, as that might lead to multiple copies of the message. Just
3350 log and proceed as if all done.
3351
3352 Arguments:
3353 max maximum number of subprocesses to leave running
3354 fallback TRUE if processing fallback hosts
3355
3356 Returns: nothing
3357 */
3358
3359 static void
3360 par_reduce(int max, BOOL fallback)
3361 {
3362 while (parcount > max)
3363 {
3364 address_item *doneaddr = par_wait();
3365 if (doneaddr == NULL)
3366 {
3367 log_write(0, LOG_MAIN|LOG_PANIC,
3368 "remote delivery process count got out of step");
3369 parcount = 0;
3370 }
3371 else remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
3372 }
3373 }
3374
3375
3376
3377
3378 /*************************************************
3379 * Do remote deliveries *
3380 *************************************************/
3381
3382 /* This function is called to process the addresses in addr_remote. We must
3383 pick off the queue all addresses that have the same transport, remote
3384 destination, and errors address, and hand them to the transport in one go,
3385 subject to some configured limitations. If this is a run to continue delivering
3386 to an existing delivery channel, skip all but those addresses that can go to
3387 that channel. The skipped addresses just get deferred.
3388
3389 If mua_wrapper is set, all addresses must be able to be sent in a single
3390 transaction. If not, this function yields FALSE.
3391
3392 In Exim 4, remote deliveries are always done in separate processes, even
3393 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
3394 is so that the base process can retain privilege. This makes the
3395 implementation of fallback transports feasible (though not initially done.)
3396
3397 We create up to the configured number of subprocesses, each of which passes
3398 back the delivery state via a pipe. (However, when sending down an existing
3399 connection, remote_max_parallel is forced to 1.)
3400
3401 Arguments:
3402 fallback TRUE if processing fallback hosts
3403
3404 Returns: TRUE normally
3405 FALSE if mua_wrapper is set and the addresses cannot all be sent
3406 in one transaction
3407 */
3408
3409 static BOOL
3410 do_remote_deliveries(BOOL fallback)
3411 {
3412 int parmax;
3413 int delivery_count;
3414 int poffset;
3415
3416 parcount = 0; /* Number of executing subprocesses */
3417
3418 /* When sending down an existing channel, only do one delivery at a time.
3419 We use a local variable (parmax) to hold the maximum number of processes;
3420 this gets reduced from remote_max_parallel if we can't create enough pipes. */
3421
3422 if (continue_transport != NULL) remote_max_parallel = 1;
3423 parmax = remote_max_parallel;
3424
3425 /* If the data for keeping a list of processes hasn't yet been
3426 set up, do so. */
3427
3428 if (parlist == NULL)
3429 {
3430 parlist = store_get(remote_max_parallel * sizeof(pardata));
3431 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3432 parlist[poffset].pid = 0;
3433 }
3434
3435 /* Now loop for each remote delivery */
3436
3437 for (delivery_count = 0; addr_remote != NULL; delivery_count++)
3438 {
3439 pid_t pid;
3440 uid_t uid;
3441 gid_t gid;
3442 int pfd[2];
3443 int address_count = 1;
3444 int address_count_max;
3445 BOOL multi_domain;
3446 BOOL use_initgroups;
3447 BOOL pipe_done = FALSE;
3448 transport_instance *tp;
3449 address_item **anchor = &addr_remote;
3450 address_item *addr = addr_remote;
3451 address_item *last = addr;
3452 address_item *next;
3453
3454 /* Pull the first address right off the list. */
3455
3456 addr_remote = addr->next;
3457 addr->next = NULL;
3458
3459 DEBUG(D_deliver|D_transport)
3460 debug_printf("--------> %s <--------\n", addr->address);
3461
3462 /* If no transport has been set, there has been a big screw-up somewhere. */
3463
3464 if ((tp = addr->transport) == NULL)
3465 {
3466 disable_logging = FALSE; /* Jic */
3467 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3468 US"No transport set by router", fallback);
3469 continue;
3470 }
3471
3472 /* Check that this base address hasn't previously been delivered to this
3473 transport. The check is necessary at this point to handle homonymic addresses
3474 correctly in cases where the pattern of redirection changes between delivery
3475 attempts. Non-homonymic previous delivery is detected earlier, at routing
3476 time. */
3477
3478 if (previously_transported(addr, FALSE)) continue;
3479
3480 /* Force failure if the message is too big. */
3481
3482 if (tp->message_size_limit != NULL)
3483 {
3484 int rc = check_message_size(tp, addr);
3485 if (rc != OK)
3486 {
3487 addr->transport_return = rc;
3488 remote_post_process(addr, LOG_MAIN, NULL, fallback);
3489 continue;
3490 }
3491 }
3492
3493 /* Get the flag which specifies whether the transport can handle different
3494 domains that nevertheless resolve to the same set of hosts. */
3495
3496 multi_domain = tp->multi_domain;
3497
3498 /* Get the maximum it can handle in one envelope, with zero meaning
3499 unlimited, which is forced for the MUA wrapper case. */
3500
3501 address_count_max = tp->max_addresses;
3502 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
3503
3504
3505 /************************************************************************/
3506 /***** This is slightly experimental code, but should be safe. *****/
3507
3508 /* The address_count_max value is the maximum number of addresses that the
3509 transport can send in one envelope. However, the transport must be capable of
3510 dealing with any number of addresses. If the number it gets exceeds its
3511 envelope limitation, it must send multiple copies of the message. This can be
3512 done over a single connection for SMTP, so uses less resources than making
3513 multiple connections. On the other hand, if remote_max_parallel is greater
3514 than one, it is perhaps a good idea to use parallel processing to move the
3515 message faster, even if that results in multiple simultaneous connections to
3516 the same host.
3517
3518 How can we come to some compromise between these two ideals? What we do is to
3519 limit the number of addresses passed to a single instance of a transport to
3520 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
3521 number of addresses routed to remote transports divided by
3522 remote_max_parallel. For example, if the message has 100 remote recipients,
3523 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
3524 once. But if rcpt_max is 100, we could send up to 100.
3525
3526 Of course, not all the remotely addresses in a message are going to go to the
3527 same set of hosts (except in smarthost configurations), so this is just a
3528 heuristic way of dividing up the work.
3529
3530 Furthermore (1), because this may not be wanted in some cases, and also to
3531 cope with really pathological cases, there is also a limit to the number of
3532 messages that are sent over one connection. This is the same limit that is
3533 used when sending several different messages over the same connection.
3534 Continue_sequence is set when in this situation, to the number sent so
3535 far, including this message.
3536
3537 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
3538 is probably because they are using VERP, in which case they want to pass only
3539 one address at a time to the transport, in order to be able to use
3540 $local_part and $domain in constructing a new return path. We could test for
3541 the use of these variables, but as it is so likely they will be used when the
3542 maximum is 1, we don't bother. Just leave the value alone. */
3543
3544 if (address_count_max != 1 &&
3545 address_count_max < remote_delivery_count/remote_max_parallel)
3546 {
3547 int new_max = remote_delivery_count/remote_max_parallel;
3548 int message_max = tp->connection_max_messages;
3549 if (connection_max_messages >= 0) message_max = connection_max_messages;
3550 message_max -= continue_sequence - 1;
3551 if (message_max > 0 && new_max > address_count_max * message_max)
3552 new_max = address_count_max * message_max;
3553 address_count_max = new_max;
3554 }
3555
3556 /************************************************************************/
3557
3558
3559 /* Pick off all addresses which have the same transport, errors address,
3560 destination, and extra headers. In some cases they point to the same host
3561 list, but we also need to check for identical host lists generated from
3562 entirely different domains. The host list pointers can be NULL in the case
3563 where the hosts are defined in the transport. There is also a configured
3564 maximum limit of addresses that can be handled at once (see comments above
3565 for how it is computed). */
3566
3567 while ((next = *anchor) != NULL && address_count < address_count_max)
3568 {
3569 if ((multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
3570 &&
3571 tp == next->transport
3572 &&
3573 same_hosts(next->host_list, addr->host_list)
3574 &&
3575 same_strings(next->p.errors_address, addr->p.errors_address)
3576 &&
3577 same_headers(next->p.extra_headers, addr->p.extra_headers)
3578 &&
3579 same_ugid(tp, next, addr)
3580 &&
3581 (next->p.remove_headers == addr->p.remove_headers ||
3582 (next->p.remove_headers != NULL &&
3583 addr->p.remove_headers != NULL &&
3584 Ustrcmp(next->p.remove_headers, addr->p.remove_headers) == 0)))
3585 {
3586 *anchor = next->next;
3587 next->next = NULL;
3588 next->first = addr; /* remember top one (for retry processing) */
3589 last->next = next;
3590 last = next;
3591 address_count++;
3592 }
3593 else anchor = &(next->next);
3594 }
3595
3596 /* If we are acting as an MUA wrapper, all addresses must go in a single
3597 transaction. If not, put them back on the chain and yield FALSE. */
3598
3599 if (mua_wrapper && addr_remote != NULL)
3600 {
3601 last->next = addr_remote;
3602 addr_remote = addr;
3603 return FALSE;
3604 }
3605
3606 /* Set up the expansion variables for this set of addresses */
3607
3608 deliver_set_expansions(addr);
3609
3610 /* Compute the return path, expanding a new one if required. The old one
3611 must be set first, as it might be referred to in the expansion. */
3612
3613 if(addr->p.errors_address != NULL)
3614 return_path = addr->p.errors_address;
3615 #ifdef EXPERIMENTAL_SRS
3616 else if(addr->p.srs_sender != NULL)
3617 return_path = addr->p.srs_sender;
3618 #endif
3619 else
3620 return_path = sender_address;
3621
3622 if (tp->return_path != NULL)
3623 {
3624 uschar *new_return_path = expand_string(tp->return_path);
3625 if (new_return_path == NULL)
3626 {
3627 if (!expand_string_forcedfail)
3628 {
3629 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3630 string_sprintf("Failed to expand return path \"%s\": %s",
3631 tp->return_path, expand_string_message), fallback);
3632 continue;
3633 }
3634 }
3635 else return_path = new_return_path;
3636 }
3637
3638 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
3639 logs and sets up error messages, so we just post-process and continue with
3640 the next address. */
3641
3642 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
3643 {
3644 remote_post_process(addr, LOG_MAIN|LOG_PANIC, NULL, fallback);
3645 continue;
3646 }
3647
3648 /* If this transport has a setup function, call it now so that it gets
3649 run in this process and not in any subprocess. That way, the results of
3650 any setup that are retained by the transport can be reusable. One of the
3651 things the setup does is to set the fallback host lists in the addresses.
3652 That is why it is called at this point, before the continue delivery
3653 processing, because that might use the fallback hosts. */
3654
3655 if (tp->setup != NULL)
3656 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
3657
3658 /* If this is a run to continue delivery down an already-established
3659 channel, check that this set of addresses matches the transport and
3660 the channel. If it does not, defer the addresses. If a host list exists,
3661 we must check that the continue host is on the list. Otherwise, the
3662 host is set in the transport. */
3663
3664 continue_more = FALSE; /* In case got set for the last lot */
3665 if (continue_transport != NULL)
3666 {
3667 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
3668 if (ok && addr->host_list != NULL)
3669 {
3670 host_item *h;
3671 ok = FALSE;
3672 for (h = addr->host_list; h != NULL; h = h->next)
3673 {
3674 if (Ustrcmp(h->name, continue_hostname) == 0)
3675 { ok = TRUE; break; }
3676 }
3677 }
3678
3679 /* Addresses not suitable; defer or queue for fallback hosts (which
3680 might be the continue host) and skip to next address. */
3681
3682 if (!ok)
3683 {
3684 DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n");
3685 next = addr;
3686
3687 if (addr->fallback_hosts != NULL && !fallback)
3688 {
3689 for (;;)
3690 {
3691 next->host_list = next->fallback_hosts;
3692 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
3693 if (next->next == NULL) break;
3694 next = next->next;
3695 }
3696 next->next = addr_fallback;
3697 addr_fallback = addr;
3698 }
3699
3700 else
3701 {
3702 while (next->next != NULL) next = next->next;
3703 next->next = addr_defer;
3704 addr_defer = addr;
3705 }
3706
3707 continue;
3708 }
3709
3710 /* Set a flag indicating whether there are further addresses that list
3711 the continued host. This tells the transport to leave the channel open,
3712 but not to pass it to another delivery process. */
3713
3714 for (next = addr_remote; next != NULL; next = next->next)
3715 {
3716 host_item *h;
3717 for (h = next->host_list; h != NULL; h = h->next)
3718 {
3719 if (Ustrcmp(h->name, continue_hostname) == 0)
3720 { continue_more = TRUE; break; }
3721 }
3722 }
3723 }
3724
3725 /* The transports set up the process info themselves as they may connect
3726 to more than one remote machine. They also have to set up the filter
3727 arguments, if required, so that the host name and address are available
3728 for expansion. */
3729
3730 transport_filter_argv = NULL;
3731
3732 /* Create the pipe for inter-process communication. If pipe creation
3733 fails, it is probably because the value of remote_max_parallel is so
3734 large that too many file descriptors for pipes have been created. Arrange
3735 to wait for a process to finish, and then try again. If we still can't
3736 create a pipe when all processes have finished, break the retry loop. */
3737
3738 while (!pipe_done)
3739 {
3740 if (pipe(pfd) == 0) pipe_done = TRUE;
3741 else if (parcount > 0) parmax = parcount;
3742 else break;
3743
3744 /* We need to make the reading end of the pipe non-blocking. There are
3745 two different options for this. Exim is cunningly (I hope!) coded so
3746 that it can use either of them, though it prefers O_NONBLOCK, which
3747 distinguishes between EOF and no-more-data. */
3748
3749 #ifdef O_NONBLOCK
3750 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
3751 #else
3752 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
3753 #endif
3754
3755 /* If the maximum number of subprocesses already exist, wait for a process
3756 to finish. If we ran out of file descriptors, parmax will have been reduced
3757 from its initial value of remote_max_parallel. */
3758
3759 par_reduce(parmax - 1, fallback);
3760 }
3761
3762 /* If we failed to create a pipe and there were no processes to wait
3763 for, we have to give up on this one. Do this outside the above loop
3764 so that we can continue the main loop. */
3765
3766 if (!pipe_done)
3767 {
3768 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3769 string_sprintf("unable to create pipe: %s", strerror(errno)), fallback);
3770 continue;
3771 }
3772
3773 /* Find a free slot in the pardata list. Must do this after the possible
3774 waiting for processes to finish, because a terminating process will free
3775 up a slot. */
3776
3777 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3778 if (parlist[poffset].pid == 0) break;
3779
3780 /* If there isn't one, there has been a horrible disaster. */
3781
3782 if (poffset >= remote_max_parallel)
3783 {
3784 (void)close(pfd[pipe_write]);
3785 (void)close(pfd[pipe_read]);
3786 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3787 US"Unexpectedly no free subprocess slot", fallback);
3788 continue;
3789 }
3790
3791 /* Now fork a subprocess to do the remote delivery, but before doing so,
3792 ensure that any cached resourses are released so as not to interfere with
3793 what happens in the subprocess. */
3794
3795 search_tidyup();
3796
3797 if ((pid = fork()) == 0)
3798 {
3799 int fd = pfd[pipe_write];
3800 host_item *h;
3801
3802 /* There are weird circumstances in which logging is disabled */
3803
3804 disable_logging = tp->disable_logging;
3805
3806 /* Show pids on debug output if parallelism possible */
3807
3808 if (parmax > 1 && (parcount > 0 || addr_remote != NULL))
3809 {
3810 DEBUG(D_any|D_v) debug_selector |= D_pid;
3811 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
3812 }
3813
3814 /* Reset the random number generator, so different processes don't all
3815 have the same sequence. In the test harness we want different, but
3816 predictable settings for each delivery process, so do something explicit
3817 here rather they rely on the fixed reset in the random number function. */
3818
3819 random_seed = running_in_test_harness? 42 + 2*delivery_count : 0;
3820
3821 /* Set close-on-exec on the pipe so that it doesn't get passed on to
3822 a new process that may be forked to do another delivery down the same
3823 SMTP connection. */
3824
3825 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
3826
3827 /* Close open file descriptors for the pipes of other processes
3828 that are running in parallel. */
3829
3830 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3831 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
3832
3833 /* This process has inherited a copy of the file descriptor
3834 for the data file, but its file pointer is shared with all the
3835 other processes running in parallel. Therefore, we have to re-open
3836 the file in order to get a new file descriptor with its own
3837 file pointer. We don't need to lock it, as the lock is held by
3838 the parent process. There doesn't seem to be any way of doing
3839 a dup-with-new-file-pointer. */
3840
3841 (void)close(deliver_datafile);
3842 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir,
3843 message_id);
3844 deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0);
3845
3846 if (deliver_datafile < 0)
3847 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
3848 "parallel delivery: %s", spoolname, strerror(errno));
3849
3850 /* Set the close-on-exec flag */
3851
3852 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
3853 FD_CLOEXEC);
3854
3855 /* Set the uid/gid of this process; bombs out on failure. */
3856
3857 exim_setugid(uid, gid, use_initgroups,
3858 string_sprintf("remote delivery to %s with transport=%s",
3859 addr->address, tp->name));
3860
3861 /* Close the unwanted half of this process' pipe, set the process state,
3862 and run the transport. Afterwards, transport_count will contain the number
3863 of bytes written. */
3864
3865 (void)close(pfd[pipe_read]);
3866 set_process_info("delivering %s using %s", message_id, tp->name);
3867 debug_print_string(tp->debug_string);
3868 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
3869
3870 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
3871 message_id, tp->name, addr->address, (addr->next == NULL)? "" : ", ...");
3872
3873 /* Ensure any cached resources that we used are now released */
3874
3875 search_tidyup();
3876
3877 /* Pass the result back down the pipe. This is a lot more information
3878 than is needed for a local delivery. We have to send back the error
3879 status for each address, the usability status for each host that is
3880 flagged as unusable, and all the retry items. When TLS is in use, we
3881 send also the cipher and peerdn information. Each type of information
3882 is flagged by an identifying byte, and is then in a fixed format (with
3883 strings terminated by zeros), and there is a final terminator at the
3884 end. The host information and retry information is all attached to
3885 the first address, so that gets sent at the start. */
3886
3887 /* Host unusability information: for most success cases this will
3888 be null. */
3889
3890 for (h = addr->host_list; h != NULL; h = h->next)
3891 {
3892 if (h->address == NULL || h->status < hstatus_unusable) continue;
3893 sprintf(CS big_buffer, "H%c%c%s", h->status, h->why, h->address);
3894 (void)write(fd, big_buffer, Ustrlen(big_buffer+3) + 4);
3895 }
3896
3897 /* The number of bytes written. This is the same for each address. Even
3898 if we sent several copies of the message down the same connection, the
3899 size of each one is the same, and it's that value we have got because
3900 transport_count gets reset before calling transport_write_message(). */
3901
3902 big_buffer[0] = 'S';
3903 memcpy(big_buffer+1, &transport_count, sizeof(transport_count));
3904 (void)write(fd, big_buffer, sizeof(transport_count) + 1);
3905
3906 /* Information about what happened to each address. Three item types are
3907 used: an optional 'X' item first, for TLS information, followed by 'R'
3908 items for any retry settings, and finally an 'A' item for the remaining
3909 data. */
3910
3911 for(; addr != NULL; addr = addr->next)
3912 {
3913 uschar *ptr;
3914 retry_item *r;
3915
3916 /* The certificate verification status goes into the flags */
3917
3918 if (tls_certificate_verified) setflag(addr, af_cert_verified);
3919
3920 /* Use an X item only if there's something to send */
3921
3922 #ifdef SUPPORT_TLS
3923 if (addr->cipher != NULL)
3924 {
3925 ptr = big_buffer;
3926 *ptr++ = 'X';
3927 sprintf(CS ptr, "%.128s", addr->cipher);
3928 while(*ptr++);
3929 if (addr->peerdn == NULL) *ptr++ = 0; else
3930 {
3931 sprintf(CS ptr, "%.512s", addr->peerdn);
3932 while(*ptr++);
3933 }
3934 (void)write(fd, big_buffer, ptr - big_buffer);
3935 }
3936 #endif
3937
3938 /* Retry information: for most success cases this will be null. */
3939
3940 for (r = addr->retries; r != NULL; r = r->next)
3941 {
3942 uschar *ptr;
3943 sprintf(CS big_buffer, "R%c%.500s", r->flags, r->key);
3944 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
3945 memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno));
3946 ptr += sizeof(r->basic_errno);
3947 memcpy(ptr, &(r->more_errno), sizeof(r->more_errno));
3948 ptr += sizeof(r->more_errno);
3949 if (r->message == NULL) *ptr++ = 0; else
3950 {
3951 sprintf(CS ptr, "%.512s", r->message);
3952 while(*ptr++);
3953 }
3954 (void)write(fd, big_buffer, ptr - big_buffer);
3955 }
3956
3957 /* The rest of the information goes in an 'A' item. */
3958
3959 ptr = big_buffer + 3;
3960 sprintf(CS big_buffer, "A%c%c", addr->transport_return,
3961 addr->special_action);
3962 memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno));
3963 ptr += sizeof(addr->basic_errno);
3964 memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno));
3965 ptr += sizeof(addr->more_errno);
3966 memcpy(ptr, &(addr->flags), sizeof(addr->flags));
3967 ptr += sizeof(addr->flags);
3968
3969 if (addr->message == NULL) *ptr++ = 0; else
3970 {
3971 sprintf(CS ptr, "%.1024s", addr->message);
3972 while(*ptr++);
3973 }
3974
3975 if (addr->user_message == NULL) *ptr++ = 0; else
3976 {
3977 sprintf(CS ptr, "%.1024s", addr->user_message);
3978 while(*ptr++);
3979 }
3980
3981 if (addr->host_used == NULL) *ptr++ = 0; else
3982 {
3983 sprintf(CS ptr, "%.256s", addr->host_used->name);
3984 while(*ptr++);
3985 sprintf(CS ptr, "%.64s", addr->host_used->address);
3986 while(*ptr++);
3987 memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port));
3988 ptr += sizeof(addr->host_used->port);
3989 }
3990 (void)write(fd, big_buffer, ptr - big_buffer);
3991 }
3992
3993 /* Add termination flag, close the pipe, and that's it. The character
3994 after 'Z' indicates whether continue_transport is now NULL or not.
3995 A change from non-NULL to NULL indicates a problem with a continuing
3996 connection. */
3997
3998 big_buffer[0] = 'Z';
3999 big_buffer[1] = (continue_transport == NULL)? '0' : '1';
4000 (void)write(fd, big_buffer, 2);
4001 (void)close(fd);
4002 exit(EXIT_SUCCESS);
4003 }
4004
4005 /* Back in the mainline: close the unwanted half of the pipe. */
4006
4007 (void)close(pfd[pipe_write]);
4008
4009 /* Fork failed; defer with error message */
4010
4011 if (pid < 0)
4012 {
4013 (void)close(pfd[pipe_read]);
4014 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4015 string_sprintf("fork failed for remote delivery to %s: %s",
4016 addr->domain, strerror(errno)), fallback);
4017 continue;
4018 }
4019
4020 /* Fork succeeded; increment the count, and remember relevant data for
4021 when the process finishes. */
4022
4023 parcount++;
4024 parlist[poffset].addrlist = parlist[poffset].addr = addr;
4025 parlist[poffset].pid = pid;
4026 parlist[poffset].fd = pfd[pipe_read];
4027 parlist[poffset].done = FALSE;
4028 parlist[poffset].msg = NULL;
4029 parlist[poffset].return_path = return_path;
4030
4031 /* If the process we've just started is sending a message down an existing
4032 channel, wait for it now. This ensures that only one such process runs at
4033 once, whatever the value of remote_max parallel. Otherwise, we might try to
4034 send two or more messages simultaneously down the same channel. This could
4035 happen if there are different domains that include the same host in otherwise
4036 different host lists.
4037
4038 Also, if the transport closes down the channel, this information gets back
4039 (continue_transport gets set to NULL) before we consider any other addresses
4040 in this message. */
4041
4042 if (continue_transport != NULL) par_reduce(0, fallback);
4043
4044 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4045 newly created process get going before we create another process. This should
4046 ensure repeatability in the tests. We only need to wait a tad. */
4047
4048 else if (running_in_test_harness) millisleep(500);
4049 }
4050
4051 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4052 are still running and post-process their addresses. */
4053
4054 par_reduce(0, fallback);
4055 return TRUE;
4056 }
4057
4058
4059
4060
4061 /*************************************************
4062 * Split an address into local part and domain *
4063 *************************************************/
4064
4065 /* This function initializes an address for routing by splitting it up into a
4066 local part and a domain. The local part is set up twice - once in its original
4067 casing, and once in lower case, and it is dequoted. We also do the "percent
4068 hack" for configured domains. This may lead to a DEFER result if a lookup
4069 defers. When a percent-hacking takes place, we insert a copy of the original
4070 address as a new parent of this address, as if we have had a redirection.
4071
4072 Argument:
4073 addr points to an addr_item block containing the address
4074
4075 Returns: OK
4076 DEFER - could not determine if domain is %-hackable
4077 */
4078
4079 int
4080 deliver_split_address(address_item *addr)
4081 {
4082 uschar *address = addr->address;
4083 uschar *domain = Ustrrchr(address, '@');
4084 uschar *t;
4085 int len = domain - address;
4086
4087 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
4088
4089 /* The implication in the RFCs (though I can't say I've seen it spelled out
4090 explicitly) is that quoting should be removed from local parts at the point
4091 where they are locally interpreted. [The new draft "821" is more explicit on
4092 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4093 removing quoting backslashes and any unquoted doublequotes. */
4094
4095 t = addr->cc_local_part = store_get(len+1);
4096 while(len-- > 0)
4097 {
4098 register int c = *address++;
4099 if (c == '\"') continue;
4100 if (c == '\\')
4101 {
4102 *t++ = *address++;
4103 len--;
4104 }
4105 else *t++ = c;
4106 }
4107 *t = 0;
4108
4109 /* We do the percent hack only for those domains that are listed in
4110 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4111
4112 if (percent_hack_domains != NULL)
4113 {
4114 int rc;
4115 uschar *new_address = NULL;
4116 uschar *local_part = addr->cc_local_part;
4117
4118 deliver_domain = addr->domain; /* set $domain */
4119
4120 while ((rc = match_isinlist(deliver_domain, &percent_hack_domains, 0,
4121 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
4122 == OK &&
4123 (t = Ustrrchr(local_part, '%')) != NULL)
4124 {
4125 new_address = string_copy(local_part);
4126 new_address[t - local_part] = '@';
4127 deliver_domain = string_copylc(t+1);
4128 local_part = string_copyn(local_part, t - local_part);
4129 }
4130
4131 if (rc == DEFER) return DEFER; /* lookup deferred */
4132
4133 /* If hackery happened, set up new parent and alter the current address. */
4134
4135 if (new_address != NULL)
4136 {
4137 address_item *new_parent = store_get(sizeof(address_item));
4138 *new_parent = *addr;
4139 addr->parent = new_parent;
4140 addr->address = new_address;
4141 addr->unique = string_copy(new_address);
4142 addr->domain = deliver_domain;
4143 addr->cc_local_part = local_part;
4144 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
4145 addr->address);
4146 }
4147 }
4148
4149 /* Create the lowercased version of the final local part, and make that the
4150 default one to be used. */
4151
4152 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
4153 return OK;
4154 }
4155
4156
4157
4158
4159 /*************************************************
4160 * Get next error message text *
4161 *************************************************/
4162
4163 /* If f is not NULL, read the next "paragraph", from a customized error message
4164 text file, terminated by a line containing ****, and expand it.
4165
4166 Arguments:
4167 f NULL or a file to read from
4168 which string indicating which string (for errors)
4169
4170 Returns: NULL or an expanded string
4171 */
4172
4173 static uschar *
4174 next_emf(FILE *f, uschar *which)
4175 {
4176 int size = 256;
4177 int ptr = 0;
4178 uschar *para, *yield;
4179 uschar buffer[256];
4180
4181 if (f == NULL) return NULL;
4182
4183 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4184 Ustrcmp(buffer, "****\n") == 0) return NULL;
4185
4186 para = store_get(size);
4187 for (;;)
4188 {
4189 para = string_cat(para, &size, &ptr, buffer, Ustrlen(buffer));
4190 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4191 Ustrcmp(buffer, "****\n") == 0) break;
4192 }
4193 para[ptr] = 0;
4194
4195 yield = expand_string(para);
4196 if (yield != NULL) return yield;
4197
4198 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
4199 "bounce_message_file or warn_message_file (%s): %s", which,
4200 expand_string_message);
4201 return NULL;
4202 }
4203
4204
4205
4206
4207 /*************************************************
4208 * Close down a passed transport channel *
4209 *************************************************/
4210
4211 /* This function is called when a passed transport channel cannot be used.
4212 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
4213 so that the function call can be the argument of a "return" statement.
4214
4215 Arguments: None
4216 Returns: DELIVER_NOT_ATTEMPTED
4217 */
4218
4219 static int
4220 continue_closedown(void)
4221 {
4222 if (continue_transport != NULL)
4223 {
4224 transport_instance *t;
4225 for (t = transports; t != NULL; t = t->next)
4226 {
4227 if (Ustrcmp(t->name, continue_transport) == 0)
4228 {
4229 if (t->info->closedown != NULL) (t->info->closedown)(t);
4230 break;
4231 }
4232 }
4233 }
4234 return DELIVER_NOT_ATTEMPTED;
4235 }
4236
4237
4238
4239
4240 /*************************************************
4241 * Print address information *
4242 *************************************************/
4243
4244 /* This function is called to output an address, or information about an
4245 address, for bounce or defer messages. If the hide_child flag is set, all we
4246 output is the original ancestor address.
4247
4248 Arguments:
4249 addr points to the address
4250 f the FILE to print to
4251 si an initial string
4252 sc a continuation string for before "generated"
4253 se an end string
4254
4255 Returns: TRUE if the address is not hidden
4256 */
4257
4258 static BOOL
4259 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
4260 uschar *se)
4261 {
4262 BOOL yield = TRUE;
4263 uschar *printed = US"";
4264 address_item *ancestor = addr;
4265 while (ancestor->parent != NULL) ancestor = ancestor->parent;
4266
4267 fprintf(f, "%s", CS si);
4268
4269 if (addr->parent != NULL && testflag(addr, af_hide_child))
4270 {
4271 printed = US"an undisclosed address";
4272 yield = FALSE;
4273 }
4274 else if (!testflag(addr, af_pfr) || addr->parent == NULL)
4275 printed = addr->address;
4276
4277 else
4278 {
4279 uschar *s = addr->address;
4280 uschar *ss;
4281
4282 if (addr->address[0] == '>') { ss = US"mail"; s++; }
4283 else if (addr->address[0] == '|') ss = US"pipe";
4284 else ss = US"save";
4285
4286 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
4287 printed = addr->parent->address;
4288 }
4289
4290 fprintf(f, "%s", CS string_printing(printed));
4291
4292 if (ancestor != addr)
4293 {
4294 uschar *original = (ancestor->onetime_parent == NULL)?
4295 ancestor->address : ancestor->onetime_parent;
4296 if (strcmpic(original, printed) != 0)
4297 fprintf(f, "%s(%sgenerated from %s)", sc,
4298 (ancestor != addr->parent)? "ultimately " : "",
4299 string_printing(original));
4300 }
4301
4302 fprintf(f, "%s", CS se);
4303 return yield;
4304 }
4305
4306
4307
4308
4309
4310 /*************************************************
4311 * Print error for an address *
4312 *************************************************/
4313
4314 /* This function is called to print the error information out of an address for
4315 a bounce or a warning message. It tries to format the message reasonably by
4316 introducing newlines. All lines are indented by 4; the initial printing
4317 position must be set before calling.
4318
4319 This function used always to print the error. Nowadays we want to restrict it
4320 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
4321 and filter "fail". We no longer pass other information willy-nilly in bounce
4322 and warning messages. Text in user_message is always output; text in message
4323 only if the af_pass_message flag is set.
4324
4325 Arguments:
4326 addr the address
4327 f the FILE to print on
4328 t some leading text
4329
4330 Returns: nothing
4331 */
4332
4333 static void
4334 print_address_error(address_item *addr, FILE *f, uschar *t)
4335 {
4336 int count = Ustrlen(t);
4337 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
4338
4339 if (s == NULL)
4340 {
4341 if (addr->user_message != NULL) s = addr->user_message; else return;
4342 }
4343
4344 fprintf(f, "\n %s", t);
4345
4346 while (*s != 0)
4347 {
4348 if (*s == '\\' && s[1] == 'n')
4349 {
4350 fprintf(f, "\n ");
4351 s += 2;
4352 count = 0;
4353 }
4354 else
4355 {
4356 fputc(*s, f);
4357 count++;
4358 if (*s++ == ':' && isspace(*s) && count > 45)
4359 {
4360 fprintf(f, "\n "); /* sic (because space follows) */
4361 count = 0;
4362 }
4363 }
4364 }
4365 }
4366
4367
4368
4369
4370
4371
4372 /*************************************************
4373 * Check list of addresses for duplication *
4374 *************************************************/
4375
4376 /* This function was introduced when the test for duplicate addresses that are
4377 not pipes, files, or autoreplies was moved from the middle of routing to when
4378 routing was complete. That was to fix obscure cases when the routing history
4379 affects the subsequent routing of identical addresses. This function is called
4380 after routing, to check that the final routed addresses are not duplicates.
4381
4382 If we detect a duplicate, we remember what it is a duplicate of. Note that
4383 pipe, file, and autoreply de-duplication is handled during routing, so we must
4384 leave such "addresses" alone here, as otherwise they will incorrectly be
4385 discarded.
4386
4387 Argument: address of list anchor
4388 Returns: nothing
4389 */
4390
4391 static void
4392 do_duplicate_check(address_item **anchor)
4393 {
4394 address_item *addr;
4395 while ((addr = *anchor) != NULL)
4396 {
4397 tree_node *tnode;
4398 if (testflag(addr, af_pfr))
4399 {
4400 anchor = &(addr->next);
4401 }
4402 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
4403 {
4404 DEBUG(D_deliver|D_route)
4405 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
4406 *anchor = addr->next;
4407 addr->dupof = tnode->data.ptr;
4408 addr->next = addr_duplicate;
4409 addr_duplicate = addr;
4410 }
4411 else
4412 {
4413 tree_add_duplicate(addr->unique, addr);
4414 anchor = &(addr->next);
4415 }
4416 }
4417 }
4418
4419
4420
4421
4422 /*************************************************
4423 * Deliver one message *
4424 *************************************************/
4425
4426 /* This is the function which is called when a message is to be delivered. It
4427 is passed the id of the message. It is possible that the message no longer
4428 exists, if some other process has delivered it, and it is also possible that
4429 the message is being worked on by another process, in which case the data file
4430 will be locked.
4431
4432 If no delivery is attempted for any of the above reasons, the function returns
4433 DELIVER_NOT_ATTEMPTED.
4434
4435 If the give_up flag is set true, do not attempt any deliveries, but instead
4436 fail all outstanding addresses and return the message to the sender (or
4437 whoever).
4438
4439 A delivery operation has a process all to itself; we never deliver more than
4440 one message in the same process. Therefore we needn't worry too much about
4441 store leakage.
4442
4443 Arguments:
4444 id the id of the message to be delivered
4445 forced TRUE if delivery was forced by an administrator; this overrides
4446 retry delays and causes a delivery to be tried regardless
4447 give_up TRUE if an administrator has requested that delivery attempts
4448 be abandoned
4449
4450 Returns: When the global variable mua_wrapper is FALSE:
4451 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
4452 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
4453 When the global variable mua_wrapper is TRUE:
4454 DELIVER_MUA_SUCCEEDED if delivery succeeded
4455 DELIVER_MUA_FAILED if delivery failed
4456 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
4457 */
4458
4459 int
4460 deliver_message(uschar *id, BOOL forced, BOOL give_up)
4461 {
4462 int i, rc;
4463 int final_yield = DELIVER_ATTEMPTED_NORMAL;
4464 time_t now = time(NULL);
4465 address_item *addr_last = NULL;
4466 uschar *filter_message = NULL;
4467 FILE *jread;
4468 int process_recipients = RECIP_ACCEPT;
4469 open_db dbblock;
4470 open_db *dbm_file;
4471
4472 uschar *info = (queue_run_pid == (pid_t)0)?
4473 string_sprintf("delivering %s", id) :
4474 string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
4475
4476 /* If the D_process_info bit is on, set_process_info() will output debugging
4477 information. If not, we want to show this initial information if D_deliver or
4478 D_queue_run is set or in verbose mode. */
4479
4480 set_process_info("%s", info);
4481
4482 if ((debug_selector & D_process_info) == 0 &&
4483 (debug_selector & (D_deliver|D_queue_run|D_v)) != 0)
4484 debug_printf("%s\n", info);
4485
4486 /* Ensure that we catch any subprocesses that are created. Although Exim
4487 sets SIG_DFL as its initial default, some routes through the code end up
4488 here with it set to SIG_IGN - cases where a non-synchronous delivery process
4489 has been forked, but no re-exec has been done. We use sigaction rather than
4490 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
4491 sure it is turned off. (There was a problem on AIX with this.) */
4492
4493 #ifdef SA_NOCLDWAIT
4494 {
4495 struct sigaction act;
4496 act.sa_handler = SIG_DFL;
4497 sigemptyset(&(act.sa_mask));
4498 act.sa_flags = 0;
4499 sigaction(SIGCHLD, &act, NULL);
4500 }
4501 #else
4502 signal(SIGCHLD, SIG_DFL);
4503 #endif
4504
4505 /* Make the forcing flag available for routers and transports, set up the
4506 global message id field, and initialize the count for returned files and the
4507 message size. This use of strcpy() is OK because the length id is checked when
4508 it is obtained from a command line (the -M or -q options), and otherwise it is
4509 known to be a valid message id. */
4510
4511 Ustrcpy(message_id, id);
4512 deliver_force = forced;
4513 return_count = 0;
4514 message_size = 0;
4515
4516 /* Initialize some flags */
4517
4518 update_spool = FALSE;
4519 remove_journal = TRUE;
4520
4521 /* Reset the random number generator, so that if several delivery processes are
4522 started from a queue runner that has already used random numbers (for sorting),
4523 they don't all get the same sequence. */
4524
4525 random_seed = 0;
4526
4527 /* Open and lock the message's data file. Exim locks on this one because the
4528 header file may get replaced as it is re-written during the delivery process.
4529 Any failures cause messages to be written to the log, except for missing files
4530 while queue running - another process probably completed delivery. As part of
4531 opening the data file, message_subdir gets set. */
4532
4533 if (!spool_open_datafile(id))
4534 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4535
4536 /* The value of message_size at this point has been set to the data length,
4537 plus one for the blank line that notionally precedes the data. */
4538
4539 /* Now read the contents of the header file, which will set up the headers in
4540 store, and also the list of recipients and the tree of non-recipients and
4541 assorted flags. It updates message_size. If there is a reading or format error,
4542 give up; if the message has been around for sufficiently long, remove it. */
4543
4544 sprintf(CS spoolname, "%s-H", id);
4545 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
4546 {
4547 if (errno == ERRNO_SPOOLFORMAT)
4548 {
4549 struct stat statbuf;
4550 sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
4551 spoolname);
4552 if (Ustat(big_buffer, &statbuf) == 0)
4553 log_write(0, LOG_MAIN, "Format error in spool file %s: "
4554 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
4555 else log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
4556 }
4557 else
4558 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
4559 strerror(errno));
4560
4561 /* If we managed to read the envelope data, received_time contains the
4562 time the message was received. Otherwise, we can calculate it from the
4563 message id. */
4564
4565 if (rc != spool_read_hdrerror)
4566 {
4567 received_time = 0;
4568 for (i = 0; i < 6; i++)
4569 received_time = received_time * BASE_62 + tab62[id[i] - '0'];
4570 }
4571
4572 /* If we've had this malformed message too long, sling it. */
4573
4574 if (now - received_time > keep_malformed)
4575 {
4576 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
4577 Uunlink(spoolname);
4578 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
4579 Uunlink(spoolname);
4580 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
4581 Uunlink(spoolname);
4582 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
4583 Uunlink(spoolname);
4584 log_write(0, LOG_MAIN, "Message removed because older than %s",
4585 readconf_printtime(keep_malformed));
4586 }
4587
4588 (void)close(deliver_datafile);
4589 deliver_datafile = -1;
4590 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4591 }
4592
4593 /* The spool header file has been read. Look to see if there is an existing
4594 journal file for this message. If there is, it means that a previous delivery
4595 attempt crashed (program or host) before it could update the spool header file.
4596 Read the list of delivered addresses from the journal and add them to the
4597 nonrecipients tree. Then update the spool file. We can leave the journal in
4598 existence, as it will get further successful deliveries added to it in this
4599 run, and it will be deleted if this function gets to its end successfully.
4600 Otherwise it might be needed again. */
4601
4602 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
4603 jread = Ufopen(spoolname, "rb");
4604 if (jread != NULL)
4605 {
4606 while (Ufgets(big_buffer, big_buffer_size, jread) != NULL)
4607 {
4608 int n = Ustrlen(big_buffer);
4609 big_buffer[n-1] = 0;
4610 tree_add_nonrecipient(big_buffer);
4611 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
4612 "journal file\n", big_buffer);
4613 }
4614 (void)fclose(jread);
4615 /* Panic-dies on error */
4616 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
4617 }
4618 else if (errno != ENOENT)
4619 {
4620 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
4621 "%s", strerror(errno));
4622 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4623 }
4624
4625 /* A null recipients list indicates some kind of disaster. */
4626
4627 if (recipients_list == NULL)
4628 {
4629 (void)close(deliver_datafile);
4630 deliver_datafile = -1;
4631 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", spoolname);
4632 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4633 }
4634
4635
4636 /* Handle a message that is frozen. There are a number of different things that
4637 can happen, but in the default situation, unless forced, no delivery is
4638 attempted. */
4639
4640 if (deliver_freeze)
4641 {
4642 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
4643 /* Moving to another directory removes the message from Exim's view. Other
4644 tools must be used to deal with it. Logging of this action happens in
4645 spool_move_message() and its subfunctions. */
4646
4647 if (move_frozen_messages &&
4648 spool_move_message(id, message_subdir, US"", US"F"))
4649 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4650 #endif
4651
4652 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
4653 maximum time to keep messages that are frozen. Thaw if we reach it, with a
4654 flag causing all recipients to be failed. The time is the age of the
4655 message, not the time since freezing. */
4656
4657 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
4658 {
4659 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
4660 process_recipients = RECIP_FAIL_TIMEOUT;
4661 }
4662
4663 /* For bounce messages (and others with no sender), thaw if the error message
4664 ignore timer is exceeded. The message will be discarded if this delivery
4665 fails. */
4666
4667 else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
4668 {
4669 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
4670 }
4671
4672 /* If this is a bounce message, or there's no auto thaw, or we haven't
4673 reached the auto thaw time yet, and this delivery is not forced by an admin
4674 user, do not attempt delivery of this message. Note that forced is set for
4675 continuing messages down the same channel, in order to skip load checking and
4676 ignore hold domains, but we don't want unfreezing in that case. */
4677
4678 else
4679 {
4680 if ((sender_address[0] == 0 ||
4681 auto_thaw <= 0 ||
4682 now <= deliver_frozen_at + auto_thaw
4683 )
4684 &&
4685 (!forced || !deliver_force_thaw || !admin_user ||
4686 continue_hostname != NULL
4687 ))
4688 {
4689 (void)close(deliver_datafile);
4690 deliver_datafile = -1;
4691 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
4692 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4693 }
4694
4695 /* If delivery was forced (by an admin user), assume a manual thaw.
4696 Otherwise it's an auto thaw. */
4697
4698 if (forced)
4699 {
4700 deliver_manual_thaw = TRUE;
4701 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
4702 }
4703 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
4704 }
4705
4706 /* We get here if any of the rules for unfreezing have triggered. */
4707
4708 deliver_freeze = FALSE;
4709 update_spool = TRUE;
4710 }
4711
4712
4713 /* Open the message log file if we are using them. This records details of
4714 deliveries, deferments, and failures for the benefit of the mail administrator.
4715 The log is not used by exim itself to track the progress of a message; that is
4716 done by rewriting the header spool file. */
4717
4718 if (message_logs)
4719 {
4720 uschar *error;
4721 int fd;
4722
4723 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
4724 fd = open_msglog_file(spoolname, SPOOL_MODE, &error);
4725
4726 if (fd < 0)
4727 {
4728 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
4729 spoolname, strerror(errno));
4730 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4731 }
4732
4733 /* Make a C stream out of it. */
4734
4735 message_log = fdopen(fd, "a");
4736 if (message_log == NULL)
4737 {
4738 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
4739 spoolname, strerror(errno));
4740 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4741 }
4742 }
4743
4744
4745 /* If asked to give up on a message, log who did it, and set the action for all
4746 the addresses. */
4747
4748 if (give_up)
4749 {
4750 struct passwd *pw = getpwuid(real_uid);
4751 log_write(0, LOG_MAIN, "cancelled by %s", (pw != NULL)?
4752 US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
4753 process_recipients = RECIP_FAIL;
4754 }
4755
4756 /* Otherwise, if there are too many Received: headers, fail all recipients. */
4757
4758 else if (received_count > received_headers_max)
4759 process_recipients = RECIP_FAIL_LOOP;
4760
4761 /* Otherwise, if a system-wide, address-independent message filter is
4762 specified, run it now, except in the case when we are failing all recipients as
4763 a result of timeout_frozen_after. If the system filter yields "delivered", then
4764 ignore the true recipients of the message. Failure of the filter file is
4765 logged, and the delivery attempt fails. */
4766
4767 else if (system_filter != NULL && process_recipients != RECIP_FAIL_TIMEOUT)
4768 {
4769 int rc;
4770 int filtertype;
4771 ugid_block ugid;
4772 redirect_block redirect;
4773
4774 if (system_filter_uid_set)
4775 {
4776 ugid.uid = system_filter_uid;
4777 ugid.gid = system_filter_gid;
4778 ugid.uid_set = ugid.gid_set = TRUE;
4779 }
4780 else
4781 {
4782 ugid.uid_set = ugid.gid_set = FALSE;
4783 }
4784
4785 return_path = sender_address;
4786 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
4787 system_filtering = TRUE;
4788
4789 /* Any error in the filter file causes a delivery to be abandoned. */
4790
4791 redirect.string = system_filter;
4792 redirect.isfile = TRUE;
4793 redirect.check_owner = redirect.check_group = FALSE;
4794 redirect.owners = NULL;
4795 redirect.owngroups = NULL;
4796 redirect.pw = NULL;
4797 redirect.modemask = 0;
4798
4799 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
4800
4801 rc = rda_interpret(
4802 &redirect, /* Where the data is */
4803 RDO_DEFER | /* Turn on all the enabling options */
4804 RDO_FAIL | /* Leave off all the disabling options */
4805 RDO_FILTER |
4806 RDO_FREEZE |
4807 RDO_REALLOG |
4808 RDO_REWRITE,
4809 NULL, /* No :include: restriction (not used in filter) */
4810 NULL, /* No sieve vacation directory (not sieve!) */
4811 NULL, /* No sieve user address (not sieve!) */
4812 NULL, /* No sieve subaddress (not sieve!) */
4813 &ugid, /* uid/gid data */
4814 &addr_new, /* Where to hang generated addresses */
4815 &filter_message, /* Where to put error message */
4816 NULL, /* Don't skip syntax errors */
4817 &filtertype, /* Will always be set to FILTER_EXIM for this call */
4818 US"system filter"); /* For error messages */
4819
4820 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
4821
4822 if (rc == FF_ERROR || rc == FF_NONEXIST)
4823 {
4824 (void)close(deliver_datafile);
4825 deliver_datafile = -1;
4826 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
4827 string_printing(filter_message));
4828 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4829 }
4830
4831 /* Reset things. If the filter message is an empty string, which can happen
4832 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
4833
4834 system_filtering = FALSE;
4835 enable_dollar_recipients = FALSE;
4836 if (filter_message != NULL && filter_message[0] == 0) filter_message = NULL;
4837
4838 /* Save the values of the system filter variables so that user filters
4839 can use them. */
4840
4841 memcpy(filter_sn, filter_n, sizeof(filter_sn));
4842
4843 /* The filter can request that delivery of the original addresses be
4844 deferred. */
4845
4846 if (rc == FF_DEFER)
4847 {
4848 process_recipients = RECIP_DEFER;
4849 deliver_msglog("Delivery deferred by system filter\n");
4850 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
4851 }
4852
4853 /* The filter can request that a message be frozen, but this does not
4854 take place if the message has been manually thawed. In that case, we must
4855 unset "delivered", which is forced by the "freeze" command to make -bF
4856 work properly. */
4857
4858 else if (rc == FF_FREEZE && !deliver_manual_thaw)
4859 {
4860 deliver_freeze = TRUE;
4861 deliver_frozen_at = time(NULL);
4862 process_recipients = RECIP_DEFER;
4863 frozen_info = string_sprintf(" by the system filter%s%s",
4864 (filter_message == NULL)? US"" : US": ",
4865 (filter_message == NULL)? US"" : filter_message);
4866 }
4867
4868 /* The filter can request that a message be failed. The error message may be
4869 quite long - it is sent back to the sender in the bounce - but we don't want
4870 to fill up the log with repetitions of it. If it starts with << then the text
4871 between << and >> is written to the log, with the rest left for the bounce
4872 message. */
4873
4874 else if (rc == FF_FAIL)
4875 {
4876 uschar *colon = US"";
4877 uschar *logmsg = US"";
4878 int loglen = 0;
4879
4880 process_recipients = RECIP_FAIL_FILTER;
4881
4882 if (filter_message != NULL)
4883 {
4884 uschar *logend;
4885 colon = US": ";
4886 if (filter_message[0] == '<' && filter_message[1] == '<' &&
4887 (logend = Ustrstr(filter_message, ">>")) != NULL)
4888 {
4889 logmsg = filter_message + 2;
4890 loglen = logend - logmsg;
4891 filter_message = logend + 2;
4892 if (filter_message[0] == 0) filter_message = NULL;
4893 }
4894 else
4895 {
4896 logmsg = filter_message;
4897 loglen = Ustrlen(filter_message);
4898 }
4899 }
4900
4901 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
4902 logmsg);
4903 }
4904
4905 /* Delivery can be restricted only to those recipients (if any) that the
4906 filter specified. */
4907
4908 else if (rc == FF_DELIVERED)
4909 {
4910 process_recipients = RECIP_IGNORE;
4911 if (addr_new == NULL)
4912 log_write(0, LOG_MAIN, "=> discarded (system filter)");
4913 else
4914 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
4915 }
4916
4917 /* If any new addresses were created by the filter, fake up a "parent"
4918 for them. This is necessary for pipes, etc., which are expected to have
4919 parents, and it also gives some sensible logging for others. Allow
4920 pipes, files, and autoreplies, and run them as the filter uid if set,
4921 otherwise as the current uid. */
4922
4923 if (addr_new != NULL)
4924 {
4925 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
4926 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
4927
4928 /* The text "system-filter" is tested in transport_set_up_command() and in
4929 set_up_shell_command() in the pipe transport, to enable them to permit
4930 $recipients, so don't change it here without also changing it there. */
4931
4932 address_item *p = addr_new;
4933 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
4934
4935 parent->domain = string_copylc(qualify_domain_recipient);
4936 parent->local_part = US"system-filter";
4937
4938 /* As part of this loop, we arrange for addr_last to end up pointing
4939 at the final address. This is used if we go on to add addresses for the
4940 original recipients. */
4941
4942 while (p != NULL)
4943 {
4944 parent->child_count++;
4945 p->parent = parent;
4946
4947 if (testflag(p, af_pfr))
4948 {
4949 uschar *tpname;
4950 uschar *type;
4951 p->uid = uid;
4952 p->gid = gid;
4953 setflag(p, af_uid_set |
4954 af_gid_set |
4955 af_allow_file |
4956 af_allow_pipe |
4957 af_allow_reply);
4958
4959 /* Find the name of the system filter's appropriate pfr transport */
4960
4961 if (p->address[0] == '|')
4962 {
4963 type = US"pipe";
4964 tpname = system_filter_pipe_transport;
4965 address_pipe = p->address;
4966 }
4967 else if (p->address[0] == '>')
4968 {
4969 type = US"reply";
4970 tpname = system_filter_reply_transport;
4971 }
4972 else
4973 {
4974 if (p->address[Ustrlen(p->address)-1] == '/')
4975 {
4976 type = US"directory";
4977 tpname = system_filter_directory_transport;
4978 }
4979 else
4980 {
4981 type = US"file";
4982 tpname = system_filter_file_transport;
4983 }
4984 address_file = p->address;
4985 }
4986
4987 /* Now find the actual transport, first expanding the name. We have
4988 set address_file or address_pipe above. */
4989
4990 if (tpname != NULL)
4991 {
4992 uschar *tmp = expand_string(tpname);
4993 address_file = address_pipe = NULL;
4994 if (tmp == NULL)
4995 p->message = string_sprintf("failed to expand \"%s\" as a "
4996 "system filter transport name", tpname);
4997 tpname = tmp;
4998 }
4999 else
5000 {
5001 p->message = string_sprintf("system_filter_%s_transport is unset",
5002 type);
5003 }
5004
5005 if (tpname != NULL)
5006 {
5007 transport_instance *tp;
5008 for (tp = transports; tp != NULL; tp = tp->next)
5009 {
5010 if (Ustrcmp(tp->name, tpname) == 0)
5011 {
5012 p->transport = tp;
5013 break;
5014 }
5015 }
5016 if (tp == NULL)
5017 p->message = string_sprintf("failed to find \"%s\" transport "
5018 "for system filter delivery", tpname);
5019 }
5020
5021 /* If we couldn't set up a transport, defer the delivery, putting the
5022 error on the panic log as well as the main log. */
5023
5024 if (p->transport == NULL)
5025 {
5026 address_item *badp = p;
5027 p = p->next;
5028 if (addr_last == NULL) addr_new = p; else addr_last->next = p;
5029 badp->local_part = badp->address; /* Needed for log line */
5030 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
5031 continue;
5032 }
5033 } /* End of pfr handling */
5034
5035 /* Either a non-pfr delivery, or we found a transport */
5036
5037 DEBUG(D_deliver|D_filter)
5038 debug_printf("system filter added %s\n", p->address);
5039
5040 addr_last = p;
5041 p = p->next;
5042 } /* Loop through all addr_new addresses */
5043 }
5044 }
5045
5046
5047 /* Scan the recipients list, and for every one that is not in the non-
5048 recipients tree, add an addr item to the chain of new addresses. If the pno
5049 value is non-negative, we must set the onetime parent from it. This which
5050 points to the relevant entry in the recipients list.
5051
5052 This processing can be altered by the setting of the process_recipients
5053 variable, which is changed if recipients are to be ignored, failed, or
5054 deferred. This can happen as a result of system filter activity, or if the -Mg
5055 option is used to fail all of them.
5056
5057 Duplicate addresses are handled later by a different tree structure; we can't
5058 just extend the non-recipients tree, because that will be re-written to the
5059 spool if the message is deferred, and in any case there are casing
5060 complications for local addresses. */
5061
5062 if (process_recipients != RECIP_IGNORE)
5063 {
5064 for (i = 0; i < recipients_count; i++)
5065 {
5066 if (tree_search(tree_nonrecipients, recipients_list[i].address) == NULL)
5067 {
5068 recipient_item *r = recipients_list + i;
5069 address_item *new = deliver_make_addr(r->address, FALSE);
5070 new->p.errors_address = r->errors_to;
5071
5072 if (r->pno >= 0)
5073 new->onetime_parent = recipients_list[r->pno].address;
5074
5075 switch (process_recipients)
5076 {
5077 /* RECIP_DEFER is set when a system filter freezes a message. */
5078
5079 case RECIP_DEFER:
5080 new->next = addr_defer;
5081 addr_defer = new;
5082 break;
5083
5084
5085 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
5086 command. */
5087
5088 case RECIP_FAIL_FILTER:
5089 new->message =
5090 (filter_message == NULL)? US"delivery cancelled" : filter_message;
5091 setflag(new, af_pass_message);
5092 goto RECIP_QUEUE_FAILED; /* below */
5093
5094
5095 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
5096 than the value in timeout_frozen_after. Treat non-bounce messages
5097 similarly to -Mg; for bounce messages we just want to discard, so
5098 don't put the address on the failed list. The timeout has already
5099 been logged. */
5100
5101 case RECIP_FAIL_TIMEOUT:
5102 new->message = US"delivery cancelled; message timed out";
5103 goto RECIP_QUEUE_FAILED; /* below */
5104
5105
5106 /* RECIP_FAIL is set when -Mg has been used. */
5107
5108 case RECIP_FAIL:
5109 new->message = US"delivery cancelled by administrator";
5110 /* Fall through */
5111
5112 /* Common code for the failure cases above. If this is not a bounce
5113 message, put the address on the failed list so that it is used to
5114 create a bounce. Otherwise do nothing - this just discards the address.
5115 The incident has already been logged. */
5116
5117 RECIP_QUEUE_FAILED:
5118 if (sender_address[0] != 0)
5119 {
5120 new->next = addr_failed;
5121 addr_failed = new;
5122 }
5123 break;
5124
5125
5126 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
5127 in the message. Process each address as a routing failure; if this
5128 is a bounce message, it will get frozen. */
5129
5130 case RECIP_FAIL_LOOP:
5131 new->message = US"Too many \"Received\" headers - suspected mail loop";
5132 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5133 break;
5134
5135
5136 /* Value should be RECIP_ACCEPT; take this as the safe default. */
5137
5138 default:
5139 if (addr_new == NULL) addr_new = new; else addr_last->next = new;
5140 addr_last = new;
5141 break;
5142 }
5143 }
5144 }
5145 }
5146
5147 DEBUG(D_deliver)
5148 {
5149 address_item *p = addr_new;
5150 debug_printf("Delivery address list:\n");
5151 while (p != NULL)
5152 {
5153 debug_printf(" %s %s\n", p->address, (p->onetime_parent == NULL)? US"" :
5154 p->onetime_parent);
5155 p = p->next;
5156 }
5157 }
5158
5159 /* Set up the buffers used for copying over the file when delivering. */
5160
5161 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
5162 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
5163
5164
5165
5166 /* Until there are no more new addresses, handle each one as follows:
5167
5168 . If this is a generated address (indicated by the presence of a parent
5169 pointer) then check to see whether it is a pipe, file, or autoreply, and
5170 if so, handle it directly here. The router that produced the address will
5171 have set the allow flags into the address, and also set the uid/gid required.
5172 Having the routers generate new addresses and then checking them here at
5173 the outer level is tidier than making each router do the checking, and
5174 means that routers don't need access to the failed address queue.
5175
5176 . Break up the address into local part and domain, and make lowercased
5177 versions of these strings. We also make unquoted versions of the local part.
5178
5179 . Handle the percent hack for those domains for which it is valid.
5180
5181 . For child addresses, determine if any of the parents have the same address.
5182 If so, generate a different string for previous delivery checking. Without
5183 this code, if the address spqr generates spqr via a forward or alias file,
5184 delivery of the generated spqr stops further attempts at the top level spqr,
5185 which is not what is wanted - it may have generated other addresses.
5186
5187 . Check on the retry database to see if routing was previously deferred, but
5188 only if in a queue run. Addresses that are to be routed are put on the
5189 addr_route chain. Addresses that are to be deferred are put on the
5190 addr_defer chain. We do all the checking first, so as not to keep the
5191 retry database open any longer than necessary.
5192
5193 . Now we run the addresses through the routers. A router may put the address
5194 on either the addr_local or the addr_remote chain for local or remote
5195 delivery, respectively, or put it on the addr_failed chain if it is
5196 undeliveable, or it may generate child addresses and put them on the
5197 addr_new chain, or it may defer an address. All the chain anchors are
5198 passed as arguments so that the routers can be called for verification
5199 purposes as well.
5200
5201 . If new addresses have been generated by the routers, da capo.
5202 */
5203
5204 header_rewritten = FALSE; /* No headers rewritten yet */
5205 while (addr_new != NULL) /* Loop until all addresses dealt with */
5206 {
5207 address_item *addr, *parent;
5208 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
5209
5210 /* Failure to open the retry database is treated the same as if it does
5211 not exist. In both cases, dbm_file is NULL. */
5212
5213 if (dbm_file == NULL)
5214 {
5215 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
5216 debug_printf("no retry data available\n");
5217 }
5218
5219 /* Scan the current batch of new addresses, to handle pipes, files and
5220 autoreplies, and determine which others are ready for routing. */
5221
5222 while (addr_new != NULL)
5223 {
5224 int rc;
5225 uschar *p;
5226 tree_node *tnode;
5227 dbdata_retry *domain_retry_record;
5228 dbdata_retry *address_retry_record;
5229
5230 addr = addr_new;
5231 addr_new = addr->next;
5232
5233 DEBUG(D_deliver|D_retry|D_route)
5234 {
5235 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5236 debug_printf("Considering: %s\n", addr->address);
5237 }
5238
5239 /* Handle generated address that is a pipe or a file or an autoreply. */
5240
5241 if (testflag(addr, af_pfr))
5242 {
5243 /* If an autoreply in a filter could not generate a syntactically valid
5244 address, give up forthwith. Set af_ignore_error so that we don't try to
5245 generate a bounce. */
5246
5247 if (testflag(addr, af_bad_reply))
5248 {
5249 addr->basic_errno = ERRNO_BADADDRESS2;
5250 addr->local_part = addr->address;
5251 addr->message =
5252 US"filter autoreply generated syntactically invalid recipient";
5253 setflag(addr, af_ignore_error);
5254 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5255 continue; /* with the next new address */
5256 }
5257
5258 /* If two different users specify delivery to the same pipe or file or
5259 autoreply, there should be two different deliveries, so build a unique
5260 string that incorporates the original address, and use this for
5261 duplicate testing and recording delivery, and also for retrying. */
5262
5263 addr->unique =
5264 string_sprintf("%s:%s", addr->address, addr->parent->unique +
5265 (testflag(addr->parent, af_homonym)? 3:0));
5266
5267 addr->address_retry_key = addr->domain_retry_key =
5268 string_sprintf("T:%s", addr->unique);
5269
5270 /* If a filter file specifies two deliveries to the same pipe or file,
5271 we want to de-duplicate, but this is probably not wanted for two mail
5272 commands to the same address, where probably both should be delivered.
5273 So, we have to invent a different unique string in that case. Just
5274 keep piling '>' characters on the front. */
5275
5276 if (addr->address[0] == '>')
5277 {
5278 while (tree_search(tree_duplicates, addr->unique) != NULL)
5279 addr->unique = string_sprintf(">%s", addr->unique);
5280 }
5281
5282 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
5283 {
5284 DEBUG(D_deliver|D_route)
5285 debug_printf("%s is a duplicate address: discarded\n", addr->address);
5286 addr->dupof = tnode->data.ptr;
5287 addr->next = addr_duplicate;
5288 addr_duplicate = addr;
5289 continue;
5290 }
5291
5292 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5293
5294 /* Check for previous delivery */
5295
5296 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5297 {
5298 DEBUG(D_deliver|D_route)
5299 debug_printf("%s was previously delivered: discarded\n", addr->address);
5300 child_done(addr, tod_stamp(tod_log));
5301 continue;
5302 }
5303
5304 /* Save for checking future duplicates */
5305
5306 tree_add_duplicate(addr->unique, addr);
5307
5308 /* Set local part and domain */
5309
5310 addr->local_part = addr->address;
5311 addr->domain = addr->parent->domain;
5312
5313 /* Ensure that the delivery is permitted. */
5314
5315 if (testflag(addr, af_file))
5316 {
5317 if (!testflag(addr, af_allow_file))
5318 {
5319 addr->basic_errno = ERRNO_FORBIDFILE;
5320 addr->message = US"delivery to file forbidden";
5321 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5322 continue; /* with the next new address */
5323 }
5324 }
5325 else if (addr->address[0] == '|')
5326 {
5327 if (!testflag(addr, af_allow_pipe))
5328 {
5329 addr->basic_errno = ERRNO_FORBIDPIPE;
5330 addr->message = US"delivery to pipe forbidden";
5331 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5332 continue; /* with the next new address */
5333 }
5334 }
5335 else if (!testflag(addr, af_allow_reply))
5336 {
5337 addr->basic_errno = ERRNO_FORBIDREPLY;
5338 addr->message = US"autoreply forbidden";
5339 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5340 continue; /* with the next new address */
5341 }
5342
5343 /* If the errno field is already set to BADTRANSPORT, it indicates
5344 failure to expand a transport string, or find the associated transport,
5345 or an unset transport when one is required. Leave this test till now so
5346 that the forbid errors are given in preference. */
5347
5348 if (addr->basic_errno == ERRNO_BADTRANSPORT)
5349 {
5350 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5351 continue;
5352 }
5353
5354 /* Treat /dev/null as a special case and abandon the delivery. This
5355 avoids having to specify a uid on the transport just for this case.
5356 Arrange for the transport name to be logged as "**bypassed**". */
5357
5358 if (Ustrcmp(addr->address, "/dev/null") == 0)
5359 {
5360 uschar *save = addr->transport->name;
5361 addr->transport->name = US"**bypassed**";
5362 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
5363 addr->transport->name = save;
5364 continue; /* with the next new address */
5365 }
5366
5367 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
5368 delivery. */
5369
5370 DEBUG(D_deliver|D_route)
5371 debug_printf("queued for %s transport\n", addr->transport->name);
5372 addr->next = addr_local;
5373 addr_local = addr;
5374 continue; /* with the next new address */
5375 }
5376
5377 /* Handle normal addresses. First, split up into local part and domain,
5378 handling the %-hack if necessary. There is the possibility of a defer from
5379 a lookup in percent_hack_domains. */
5380
5381 if ((rc = deliver_split_address(addr)) == DEFER)
5382 {
5383 addr->message = US"cannot check percent_hack_domains";
5384 addr->basic_errno = ERRNO_LISTDEFER;
5385 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
5386 continue;
5387 }
5388
5389 /* Check to see if the domain is held. If so, proceed only if the
5390 delivery was forced by hand. */
5391
5392 deliver_domain = addr->domain; /* set $domain */
5393 if (!forced && hold_domains != NULL &&
5394 (rc = match_isinlist(addr->domain, &hold_domains, 0,
5395 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
5396 NULL)) != FAIL)
5397 {
5398 if (rc == DEFER)
5399 {
5400 addr->message = US"hold_domains lookup deferred";
5401 addr->basic_errno = ERRNO_LISTDEFER;
5402 }
5403 else
5404 {
5405 addr->message = US"domain is held";
5406 addr->basic_errno = ERRNO_HELD;
5407 }
5408 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
5409 continue;
5410 }
5411
5412 /* Now we can check for duplicates and previously delivered addresses. In
5413 order to do this, we have to generate a "unique" value for each address,
5414 because there may be identical actual addresses in a line of descendents.
5415 The "unique" field is initialized to the same value as the "address" field,
5416 but gets changed here to cope with identically-named descendents. */
5417
5418 for (parent = addr->parent; parent != NULL; parent = parent->parent)
5419 if (strcmpic(addr->address, parent->address) == 0) break;
5420
5421 /* If there's an ancestor with the same name, set the homonym flag. This
5422 influences how deliveries are recorded. Then add a prefix on the front of
5423 the unique address. We use \n\ where n starts at 0 and increases each time.
5424 It is unlikely to pass 9, but if it does, it may look odd but will still
5425 work. This means that siblings or cousins with the same names are treated
5426 as duplicates, which is what we want. */
5427
5428 if (parent != NULL)
5429 {
5430 setflag(addr, af_homonym);
5431 if (parent->unique[0] != '\\')
5432 addr->unique = string_sprintf("\\0\\%s", addr->address);
5433 else
5434 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
5435 addr->address);
5436 }
5437
5438 /* Ensure that the domain in the unique field is lower cased, because
5439 domains are always handled caselessly. */
5440
5441 p = Ustrrchr(addr->unique, '@');
5442 while (*p != 0) { *p = tolower(*p); p++; }
5443
5444 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5445
5446 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5447 {
5448 DEBUG(D_deliver|D_route)
5449 debug_printf("%s was previously delivered: discarded\n", addr->unique);
5450 child_done(addr, tod_stamp(tod_log));
5451 continue;
5452 }
5453
5454 /* Get the routing retry status, saving the two retry keys (with and
5455 without the local part) for subsequent use. Ignore retry records that
5456 are too old. */
5457
5458 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
5459 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
5460 addr->domain);
5461
5462 if (dbm_file == NULL)
5463 domain_retry_record = address_retry_record = NULL;
5464 else
5465 {
5466 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
5467 if (domain_retry_record != NULL &&
5468 now - domain_retry_record->time_stamp > retry_data_expire)
5469 domain_retry_record = NULL;
5470
5471 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
5472 if (address_retry_record != NULL &&
5473 now - address_retry_record->time_stamp > retry_data_expire)
5474 address_retry_record = NULL;
5475 }
5476
5477 DEBUG(D_deliver|D_retry)
5478 {
5479 if (domain_retry_record == NULL)
5480 debug_printf("no domain retry record\n");
5481 if (address_retry_record == NULL)
5482 debug_printf("no address retry record\n");
5483 }
5484
5485 /* If we are sending a message down an existing SMTP connection, we must
5486 assume that the message which created the connection managed to route
5487 an address to that connection. We do not want to run the risk of taking
5488 a long time over routing here, because if we do, the server at the other
5489 end of the connection may time it out. This is especially true for messages
5490 with lots of addresses. For this kind of delivery, queue_running is not
5491 set, so we would normally route all addresses. We take a pragmatic approach
5492 and defer routing any addresses that have any kind of domain retry record.
5493 That is, we don't even look at their retry times. It doesn't matter if this
5494 doesn't work occasionally. This is all just an optimization, after all.
5495
5496 The reason for not doing the same for address retries is that they normally
5497 arise from 4xx responses, not DNS timeouts. */
5498
5499 if (continue_hostname != NULL && domain_retry_record != NULL)
5500 {
5501 addr->message = US"reusing SMTP connection skips previous routing defer";
5502 addr->basic_errno = ERRNO_RRETRY;
5503 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5504 }
5505
5506 /* If we are in a queue run, defer routing unless there is no retry data or
5507 we've passed the next retry time, or this message is forced. In other
5508 words, ignore retry data when not in a queue run.
5509
5510 However, if the domain retry time has expired, always allow the routing
5511 attempt. If it fails again, the address will be failed. This ensures that
5512 each address is routed at least once, even after long-term routing
5513 failures.
5514
5515 If there is an address retry, check that too; just wait for the next
5516 retry time. This helps with the case when the temporary error on the
5517 address was really message-specific rather than address specific, since
5518 it allows other messages through.
5519
5520 We also wait for the next retry time if this is a message sent down an
5521 existing SMTP connection (even though that will be forced). Otherwise there
5522 will be far too many attempts for an address that gets a 4xx error. In
5523 fact, after such an error, we should not get here because, the host should
5524 not be remembered as one this message needs. However, there was a bug that
5525 used to cause this to happen, so it is best to be on the safe side. */
5526
5527 else if (((queue_running && !deliver_force) || continue_hostname != NULL)
5528 &&
5529 ((domain_retry_record != NULL &&
5530 now < domain_retry_record->next_try &&
5531 !domain_retry_record->expired)
5532 ||
5533 (address_retry_record != NULL &&
5534 now < address_retry_record->next_try))
5535 )
5536 {
5537 addr->message = US"retry time not reached";
5538 addr->basic_errno = ERRNO_RRETRY;
5539 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5540 }
5541
5542 /* The domain is OK for routing. Remember if retry data exists so it
5543 can be cleaned up after a successful delivery. */
5544
5545 else
5546 {
5547 if (domain_retry_record != NULL || address_retry_record != NULL)
5548 setflag(addr, af_dr_retry_exists);
5549 addr->next = addr_route;
5550 addr_route = addr;
5551 DEBUG(D_deliver|D_route)
5552 debug_printf("%s: queued for routing\n", addr->address);
5553 }
5554 }
5555
5556 /* The database is closed while routing is actually happening. Requests to
5557 update it are put on a chain and all processed together at the end. */
5558
5559 if (dbm_file != NULL) dbfn_close(dbm_file);
5560
5561 /* If queue_domains is set, we don't even want to try routing addresses in
5562 those domains. During queue runs, queue_domains is forced to be unset.
5563 Optimize by skipping this pass through the addresses if nothing is set. */
5564
5565 if (!deliver_force && queue_domains != NULL)
5566 {
5567 address_item *okaddr = NULL;
5568 while (addr_route != NULL)
5569 {
5570 address_item *addr = addr_route;
5571 addr_route = addr->next;
5572
5573 deliver_domain = addr->domain; /* set $domain */
5574 if ((rc = match_isinlist(addr->domain, &queue_domains, 0,
5575 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
5576 != OK)
5577 {
5578 if (rc == DEFER)
5579 {
5580 addr->basic_errno = ERRNO_LISTDEFER;
5581 addr->message = US"queue_domains lookup deferred";
5582 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5583 }
5584 else
5585 {
5586 addr->next = okaddr;
5587 okaddr = addr;
5588 }
5589 }
5590 else
5591 {
5592 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
5593 addr->message = US"domain is in queue_domains";
5594 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5595 }
5596 }
5597
5598 addr_route = okaddr;
5599 }
5600
5601 /* Now route those addresses that are not deferred. */
5602
5603 while (addr_route != NULL)
5604 {
5605 int rc;
5606 address_item *addr = addr_route;
5607 uschar *old_domain = addr->domain;
5608 uschar *old_unique = addr->unique;
5609 addr_route = addr->next;
5610 addr->next = NULL;
5611
5612 /* Just in case some router parameter refers to it. */
5613
5614 return_path = (addr->p.errors_address != NULL)?
5615 addr->p.errors_address : sender_address;
5616
5617 /* If a router defers an address, add a retry item. Whether or not to
5618 use the local part in the key is a property of the router. */
5619
5620 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
5621 &addr_succeed, v_none)) == DEFER)
5622 retry_add_item(addr, (addr->router->retry_use_local_part)?
5623 string_sprintf("R:%s@%s", addr->local_part, addr->domain) :
5624 string_sprintf("R:%s", addr->domain), 0);
5625
5626 /* Otherwise, if there is an existing retry record in the database, add
5627 retry items to delete both forms. Since the domain might have been
5628 rewritten (expanded to fully qualified) as a result of routing, ensure
5629 that the rewritten form is also deleted. */
5630
5631 else if (testflag(addr, af_dr_retry_exists))
5632 {
5633 retry_add_item(addr, addr->address_retry_key, rf_delete);
5634 retry_add_item(addr, addr->domain_retry_key, rf_delete);
5635 if (Ustrcmp(addr->domain, old_domain) != 0)
5636 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
5637 }
5638
5639 /* DISCARD is given for :blackhole: and "seen finish". The event has been
5640 logged, but we need to ensure the address (and maybe parents) is marked
5641 done. */
5642
5643 if (rc == DISCARD)
5644 {
5645 address_done(addr, tod_stamp(tod_log));
5646 continue; /* route next address */
5647 }
5648
5649 /* The address is finished with (failed or deferred). */
5650
5651 if (rc != OK)
5652 {
5653 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
5654 continue; /* route next address */
5655 }
5656
5657 /* The address has been routed. If the router changed the domain, it will
5658 also have changed the unique address. We have to test whether this address
5659 has already been delivered, because it's the unique address that finally
5660 gets recorded. */
5661
5662 if (addr->unique != old_unique &&
5663 tree_search(tree_nonrecipients, addr->unique) != 0)
5664 {
5665 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
5666 "discarded\n", addr->address);
5667 if (addr_remote == addr) addr_remote = addr->next;
5668 else if (addr_local == addr) addr_local = addr->next;
5669 }
5670
5671 /* If the router has same_domain_copy_routing set, we are permitted to copy
5672 the routing for any other addresses with the same domain. This is an
5673 optimisation to save repeated DNS lookups for "standard" remote domain
5674 routing. The option is settable only on routers that generate host lists.
5675 We play it very safe, and do the optimization only if the address is routed
5676 to a remote transport, there are no header changes, and the domain was not
5677 modified by the router. */
5678
5679 if (addr_remote == addr &&
5680 addr->router->same_domain_copy_routing &&
5681 addr->p.extra_headers == NULL &&
5682 addr->p.remove_headers == NULL &&
5683 old_domain == addr->domain)
5684 {
5685 address_item **chain = &addr_route;
5686 while (*chain != NULL)
5687 {
5688 address_item *addr2 = *chain;
5689 if (Ustrcmp(addr2->domain, addr->domain) != 0)
5690 {
5691 chain = &(addr2->next);
5692 continue;
5693 }
5694
5695 /* Found a suitable address; take it off the routing list and add it to
5696 the remote delivery list. */
5697
5698 *chain = addr2->next;
5699 addr2->next = addr_remote;
5700 addr_remote = addr2;
5701
5702 /* Copy the routing data */
5703
5704 addr2->domain = addr->domain;
5705 addr2->router = addr->router;
5706 addr2->transport = addr->transport;
5707 addr2->host_list = addr->host_list;
5708 addr2->fallback_hosts = addr->fallback_hosts;
5709 addr2->p.errors_address = addr->p.errors_address;
5710 copyflag(addr2, addr, af_hide_child | af_local_host_removed);
5711
5712 DEBUG(D_deliver|D_route)
5713 {
5714 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
5715 "routing %s\n"
5716 "Routing for %s copied from %s\n",
5717 addr2->address, addr2->address, addr->address);
5718 }
5719 }
5720 }
5721 } /* Continue with routing the next address. */
5722 } /* Loop to process any child addresses that the routers created, and
5723 any rerouted addresses that got put back on the new chain. */
5724
5725
5726 /* Debugging: show the results of the routing */
5727
5728 DEBUG(D_deliver|D_retry|D_route)
5729 {
5730 address_item *p = addr_local;
5731 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5732 debug_printf("After routing:\n Local deliveries:\n");
5733 while (p != NULL)
5734 {
5735 debug_printf(" %s\n", p->address);
5736 p = p->next;
5737 }
5738
5739 p = addr_remote;
5740 debug_printf(" Remote deliveries:\n");
5741 while (p != NULL)
5742 {
5743 debug_printf(" %s\n", p->address);
5744 p = p->next;
5745 }
5746
5747 p = addr_failed;
5748 debug_printf(" Failed addresses:\n");
5749 while (p != NULL)
5750 {
5751 debug_printf(" %s\n", p->address);
5752 p = p->next;
5753 }
5754
5755 p = addr_defer;
5756 debug_printf(" Deferred addresses:\n");
5757 while (p != NULL)
5758 {
5759 debug_printf(" %s\n", p->address);
5760 p = p->next;
5761 }
5762 }
5763
5764 /* Free any resources that were cached during routing. */
5765
5766 search_tidyup();
5767 route_tidyup();
5768
5769 /* These two variables are set only during routing, after check_local_user.
5770 Ensure they are not set in transports. */
5771
5772 local_user_gid = (gid_t)(-1);
5773 local_user_uid = (uid_t)(-1);
5774
5775 /* Check for any duplicate addresses. This check is delayed until after
5776 routing, because the flexibility of the routing configuration means that
5777 identical addresses with different parentage may end up being redirected to
5778 different addresses. Checking for duplicates too early (as we previously used
5779 to) makes this kind of thing not work. */
5780
5781 do_duplicate_check(&addr_local);
5782 do_duplicate_check(&addr_remote);
5783
5784 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
5785 remote transport. The check that they all end up in one transaction happens in
5786 the do_remote_deliveries() function. */
5787
5788 if (mua_wrapper && (addr_local != NULL || addr_failed != NULL ||
5789 addr_defer != NULL))
5790 {
5791 address_item *addr;
5792 uschar *which, *colon, *msg;
5793
5794 if (addr_local != NULL)
5795 {
5796 addr = addr_local;
5797 which = US"local";
5798 }
5799 else if (addr_defer != NULL)
5800 {
5801 addr = addr_defer;
5802 which = US"deferred";
5803 }
5804 else
5805 {
5806 addr = addr_failed;
5807 which = US"failed";
5808 }
5809
5810 while (addr->parent != NULL) addr = addr->parent;
5811
5812 if (addr->message != NULL)
5813 {
5814 colon = US": ";
5815 msg = addr->message;
5816 }
5817 else colon = msg = US"";
5818
5819 /* We don't need to log here for a forced failure as it will already
5820 have been logged. Defer will also have been logged, but as a defer, so we do
5821 need to do the failure logging. */
5822
5823 if (addr != addr_failed)
5824 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
5825 addr->address, which);
5826
5827 /* Always write an error to the caller */
5828
5829 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
5830 which, colon, msg);
5831
5832 final_yield = DELIVER_MUA_FAILED;
5833 addr_failed = addr_defer = NULL; /* So that we remove the message */
5834 goto DELIVERY_TIDYUP;
5835 }
5836
5837
5838 /* If this is a run to continue deliveries to an external channel that is
5839 already set up, defer any local deliveries. */
5840
5841 if (continue_transport != NULL)
5842 {
5843 if (addr_defer == NULL) addr_defer = addr_local; else
5844 {
5845 address_item *addr = addr_defer;
5846 while (addr->next != NULL) addr = addr->next;
5847 addr->next = addr_local;
5848 }
5849 addr_local = NULL;
5850 }
5851
5852
5853 /* Because address rewriting can happen in the routers, we should not really do
5854 ANY deliveries until all addresses have been routed, so that all recipients of
5855 the message get the same headers. However, this is in practice not always
5856 possible, since sometimes remote addresses give DNS timeouts for days on end.
5857 The pragmatic approach is to deliver what we can now, saving any rewritten
5858 headers so that at least the next lot of recipients benefit from the rewriting
5859 that has already been done.
5860
5861 If any headers have been rewritten during routing, update the spool file to
5862 remember them for all subsequent deliveries. This can be delayed till later if
5863 there is only address to be delivered - if it succeeds the spool write need not
5864 happen. */
5865
5866 if (header_rewritten &&
5867 ((addr_local != NULL &&
5868 (addr_local->next != NULL || addr_remote != NULL)) ||
5869 (addr_remote != NULL && addr_remote->next != NULL)))
5870 {
5871 /* Panic-dies on error */
5872 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5873 header_rewritten = FALSE;
5874 }
5875
5876
5877 /* If there are any deliveries to be done, open the journal file. This is used
5878 to record successful deliveries as soon as possible after each delivery is
5879 known to be complete. A file opened with O_APPEND is used so that several
5880 processes can run simultaneously.
5881
5882 The journal is just insurance against crashes. When the spool file is
5883 ultimately updated at the end of processing, the journal is deleted. If a
5884 journal is found to exist at the start of delivery, the addresses listed
5885 therein are added to the non-recipients. */
5886
5887 if (addr_local != NULL || addr_remote != NULL)
5888 {
5889 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
5890 journal_fd = Uopen(spoolname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE);
5891
5892 if (journal_fd < 0)
5893 {
5894 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
5895 spoolname, strerror(errno));
5896 return DELIVER_NOT_ATTEMPTED;
5897 }
5898
5899 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
5900 that the mode is correct - the group setting doesn't always seem to get
5901 set automatically. */
5902
5903 (void)fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC);
5904 (void)fchown(journal_fd, exim_uid, exim_gid);
5905 (void)fchmod(journal_fd, SPOOL_MODE);
5906 }
5907
5908
5909 /* Now we can get down to the business of actually doing deliveries. Local
5910 deliveries are done first, then remote ones. If ever the problems of how to
5911 handle fallback transports are figured out, this section can be put into a loop
5912 for handling fallbacks, though the uid switching will have to be revised. */
5913
5914 /* Precompile a regex that is used to recognize a parameter in response
5915 to an LHLO command, if is isn't already compiled. This may be used on both
5916 local and remote LMTP deliveries. */
5917
5918 if (regex_IGNOREQUOTA == NULL) regex_IGNOREQUOTA =
5919 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
5920
5921 /* Handle local deliveries */
5922
5923 if (addr_local != NULL)
5924 {
5925 DEBUG(D_deliver|D_transport)
5926 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
5927 do_local_deliveries();
5928 disable_logging = FALSE;
5929 }
5930
5931 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
5932 so just queue them all. */
5933
5934 if (queue_run_local)
5935 {
5936 while (addr_remote != NULL)
5937 {
5938 address_item *addr = addr_remote;
5939 addr_remote = addr->next;
5940 addr->next = NULL;
5941 addr->basic_errno = ERRNO_LOCAL_ONLY;
5942 addr->message = US"remote deliveries suppressed";
5943 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
5944 }
5945 }
5946
5947 /* Handle remote deliveries */
5948
5949 if (addr_remote != NULL)
5950 {
5951 DEBUG(D_deliver|D_transport)
5952 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
5953
5954 /* Precompile some regex that are used to recognize parameters in response
5955 to an EHLO command, if they aren't already compiled. */
5956
5957 if (regex_PIPELINING == NULL) regex_PIPELINING =
5958 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
5959
5960 if (regex_SIZE == NULL) regex_SIZE =
5961 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
5962
5963 if (regex_AUTH == NULL) regex_AUTH =
5964 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
5965 FALSE, TRUE);
5966
5967 #ifdef SUPPORT_TLS
5968 if (regex_STARTTLS == NULL) regex_STARTTLS =
5969 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
5970 #endif
5971
5972 /* Now sort the addresses if required, and do the deliveries. The yield of
5973 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
5974 cannot be delivered in one transaction. */
5975
5976 if (remote_sort_domains != NULL) sort_remote_deliveries();
5977 if (!do_remote_deliveries(FALSE))
5978 {
5979 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
5980 "be delivered in one transaction");
5981 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
5982
5983 final_yield = DELIVER_MUA_FAILED;
5984 addr_failed = addr_defer = NULL; /* So that we remove the message */
5985 goto DELIVERY_TIDYUP;
5986 }
5987
5988 /* See if any of the addresses that failed got put on the queue for delivery
5989 to their fallback hosts. We do it this way because often the same fallback
5990 host is used for many domains, so all can be sent in a single transaction
5991 (if appropriately configured). */
5992
5993 if (addr_fallback != NULL && !mua_wrapper)
5994 {
5995 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
5996 addr_remote = addr_fallback;
5997 addr_fallback = NULL;
5998 if (remote_sort_domains != NULL) sort_remote_deliveries();
5999 do_remote_deliveries(TRUE);
6000 }
6001 disable_logging = FALSE;
6002 }
6003
6004
6005 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6006 phase, to minimize cases of half-done things. */
6007
6008 DEBUG(D_deliver)
6009 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6010
6011 /* Root privilege is no longer needed */
6012
6013 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
6014
6015 set_process_info("tidying up after delivering %s", message_id);
6016 signal(SIGTERM, SIG_IGN);
6017
6018 /* When we are acting as an MUA wrapper, the smtp transport will either have
6019 succeeded for all addresses, or failed them all in normal cases. However, there
6020 are some setup situations (e.g. when a named port does not exist) that cause an
6021 immediate exit with deferral of all addresses. Convert those into failures. We
6022 do not ever want to retry, nor do we want to send a bounce message. */
6023
6024 if (mua_wrapper)
6025 {
6026 if (addr_defer != NULL)
6027 {
6028 address_item *addr, *nextaddr;
6029 for (addr = addr_defer; addr != NULL; addr = nextaddr)
6030 {
6031 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
6032 "delivery", addr->address);
6033 nextaddr = addr->next;
6034 addr->next = addr_failed;
6035 addr_failed = addr;
6036 }
6037 addr_defer = NULL;
6038 }
6039
6040 /* Now all should either have succeeded or failed. */
6041
6042 if (addr_failed == NULL) final_yield = DELIVER_MUA_SUCCEEDED; else
6043 {
6044 uschar *s = (addr_failed->user_message != NULL)?
6045 addr_failed->user_message : addr_failed->message;
6046
6047 fprintf(stderr, "Delivery failed: ");
6048 if (addr_failed->basic_errno > 0)
6049 {
6050 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
6051 if (s != NULL) fprintf(stderr, ": ");
6052 }
6053 if (s == NULL)
6054 {
6055 if (addr_failed->basic_errno <= 0) fprintf(stderr, "unknown error");
6056 }
6057 else fprintf(stderr, "%s", CS s);
6058 fprintf(stderr, "\n");
6059
6060 final_yield = DELIVER_MUA_FAILED;
6061 addr_failed = NULL;
6062 }
6063 }
6064
6065 /* In a normal configuration, we now update the retry database. This is done in
6066 one fell swoop at the end in order not to keep opening and closing (and
6067 locking) the database. The code for handling retries is hived off into a
6068 separate module for convenience. We pass it the addresses of the various
6069 chains, because deferred addresses can get moved onto the failed chain if the
6070 retry cutoff time has expired for all alternative destinations. Bypass the
6071 updating of the database if the -N flag is set, which is a debugging thing that
6072 prevents actual delivery. */
6073
6074 else if (!dont_deliver) retry_update(&addr_defer, &addr_failed, &addr_succeed);
6075
6076 /* If any addresses failed, we must send a message to somebody, unless
6077 af_ignore_error is set, in which case no action is taken. It is possible for
6078 several messages to get sent if there are addresses with different
6079 requirements. */
6080
6081 while (addr_failed != NULL)
6082 {
6083 pid_t pid;
6084 int fd;
6085 uschar *logtod = tod_stamp(tod_log);
6086 address_item *addr;
6087 address_item *handled_addr = NULL;
6088 address_item **paddr;
6089 address_item *msgchain = NULL;
6090 address_item **pmsgchain = &msgchain;
6091
6092 /* There are weird cases when logging is disabled in the transport. However,
6093 there may not be a transport (address failed by a router). */
6094
6095 disable_logging = FALSE;
6096 if (addr_failed->transport != NULL)
6097 disable_logging = addr_failed->transport->disable_logging;
6098
6099 DEBUG(D_deliver)
6100 debug_printf("processing failed address %s\n", addr_failed->address);
6101
6102 /* There are only two ways an address in a bounce message can get here:
6103
6104 (1) When delivery was initially deferred, but has now timed out (in the call
6105 to retry_update() above). We can detect this by testing for
6106 af_retry_timedout. If the address does not have its own errors address,
6107 we arrange to ignore the error.
6108
6109 (2) If delivery failures for bounce messages are being ignored. We can detect
6110 this by testing for af_ignore_error. This will also be set if a bounce
6111 message has been autothawed and the ignore_bounce_errors_after time has
6112 passed. It might also be set if a router was explicitly configured to
6113 ignore errors (errors_to = "").
6114
6115 If neither of these cases obtains, something has gone wrong. Log the
6116 incident, but then ignore the error. */
6117
6118 if (sender_address[0] == 0 && addr_failed->p.errors_address == NULL)
6119 {
6120 if (!testflag(addr_failed, af_retry_timedout) &&
6121 !testflag(addr_failed, af_ignore_error))
6122 {
6123 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
6124 "failure is neither frozen nor ignored (it's been ignored)");
6125 }
6126 setflag(addr_failed, af_ignore_error);
6127 }
6128
6129 /* If the first address on the list has af_ignore_error set, just remove
6130 it from the list, throw away any saved message file, log it, and
6131 mark the recipient done. */
6132
6133 if (testflag(addr_failed, af_ignore_error))
6134 {
6135 addr = addr_failed;
6136 addr_failed = addr->next;
6137 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
6138
6139 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
6140 addr->address,
6141 (addr->parent == NULL)? US"" : US" <",
6142 (addr->parent == NULL)? US"" : addr->parent->address,
6143 (addr->parent == NULL)? US"" : US">");
6144
6145 address_done(addr, logtod);
6146 child_done(addr, logtod);
6147 /* Panic-dies on error */
6148 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6149 }
6150
6151 /* Otherwise, handle the sending of a message. Find the error address for
6152 the first address, then send a message that includes all failed addresses
6153 that have the same error address. Note the bounce_recipient is a global so
6154 that it can be accesssed by $bounce_recipient while creating a customized
6155 error message. */
6156
6157 else
6158 {
6159 bounce_recipient = (addr_failed->p.errors_address == NULL)?
6160 sender_address : addr_failed->p.errors_address;
6161
6162 /* Make a subprocess to send a message */
6163
6164 pid = child_open_exim(&fd);
6165
6166 /* Creation of child failed */
6167
6168 if (pid < 0)
6169 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6170 "create child process to send failure message: %s", getpid(),
6171 getppid(), strerror(errno));
6172
6173 /* Creation of child succeeded */
6174
6175 else
6176 {
6177 int ch, rc;
6178 int filecount = 0;
6179 int rcount = 0;
6180 uschar *bcc, *emf_text;
6181 FILE *f = fdopen(fd, "wb");
6182 FILE *emf = NULL;
6183 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
6184 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
6185 DELIVER_IN_BUFFER_SIZE;
6186
6187 DEBUG(D_deliver)
6188 debug_printf("sending error message to: %s\n", bounce_recipient);
6189
6190 /* Scan the addresses for all that have the same errors address, removing
6191 them from the addr_failed chain, and putting them on msgchain. */
6192
6193 paddr = &addr_failed;
6194 for (addr = addr_failed; addr != NULL; addr = *paddr)
6195 {
6196 if (Ustrcmp(bounce_recipient, (addr->p.errors_address == NULL)?
6197 sender_address : addr->p.errors_address) != 0)
6198 {
6199 paddr = &(addr->next); /* Not the same; skip */
6200 }
6201 else /* The same - dechain */
6202 {
6203 *paddr = addr->next;
6204 *pmsgchain = addr;
6205 addr->next = NULL;
6206 pmsgchain = &(addr->next);
6207 }
6208 }
6209
6210 /* Include X-Failed-Recipients: for automatic interpretation, but do
6211 not let any one header line get too long. We do this by starting a
6212 new header every 50 recipients. Omit any addresses for which the
6213 "hide_child" flag is set. */
6214
6215 for (addr = msgchain; addr != NULL; addr = addr->next)
6216 {
6217 if (testflag(addr, af_hide_child)) continue;
6218 if (rcount >= 50)
6219 {
6220 fprintf(f, "\n");
6221 rcount = 0;
6222 }
6223 fprintf(f, "%s%s",
6224 (rcount++ == 0)? "X-Failed-Recipients: " : ",\n ",
6225 (testflag(addr, af_pfr) && addr->parent != NULL)?
6226 string_printing(addr->parent->address) :
6227 string_printing(addr->address));
6228 }
6229 if (rcount > 0) fprintf(f, "\n");
6230
6231 /* Output the standard headers */
6232
6233 if (errors_reply_to != NULL)
6234 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6235 fprintf(f, "Auto-Submitted: auto-replied\n");
6236 fprintf(f, "From: Mail Delivery System <Mailer-Daemon@%s>\n",
6237 qualify_domain_sender);
6238 fprintf(f, "To: %s\n", bounce_recipient);
6239
6240 /* Open a template file if one is provided. Log failure to open, but
6241 carry on - default texts will be used. */
6242
6243 if (bounce_message_file != NULL)
6244 {
6245 emf = Ufopen(bounce_message_file, "rb");
6246 if (emf == NULL)
6247 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
6248 "message texts: %s", bounce_message_file, strerror(errno));
6249 }
6250
6251 /* Quietly copy to configured additional addresses if required. */
6252
6253 bcc = moan_check_errorcopy(bounce_recipient);
6254 if (bcc != NULL) fprintf(f, "Bcc: %s\n", bcc);
6255
6256 /* The texts for the message can be read from a template file; if there
6257 isn't one, or if it is too short, built-in texts are used. The first
6258 emf text is a Subject: and any other headers. */
6259
6260 emf_text = next_emf(emf, US"header");
6261 if (emf_text != NULL) fprintf(f, "%s\n", emf_text); else
6262 {
6263 fprintf(f, "Subject: Mail delivery failed%s\n\n",
6264 to_sender? ": returning message to sender" : "");
6265 }
6266
6267 emf_text = next_emf(emf, US"intro");
6268 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6269 {
6270 fprintf(f,
6271 /* This message has been reworded several times. It seems to be confusing to
6272 somebody, however it is worded. I have retreated to the original, simple
6273 wording. */
6274 "This message was created automatically by mail delivery software.\n");
6275 if (bounce_message_text != NULL) fprintf(f, "%s", CS bounce_message_text);
6276 if (to_sender)
6277 {
6278 fprintf(f,
6279 "\nA message that you sent could not be delivered to one or more of its\n"
6280 "recipients. This is a permanent error. The following address(es) failed:\n");
6281 }
6282 else
6283 {
6284 fprintf(f,
6285 "\nA message sent by\n\n <%s>\n\n"
6286 "could not be delivered to one or more of its recipients. The following\n"
6287 "address(es) failed:\n", sender_address);
6288 }
6289 }
6290 fprintf(f, "\n");
6291
6292 /* Process the addresses, leaving them on the msgchain if they have a
6293 file name for a return message. (There has already been a check in
6294 post_process_one() for the existence of data in the message file.) A TRUE
6295 return from print_address_information() means that the address is not
6296 hidden. */
6297
6298 paddr = &msgchain;
6299 for (addr = msgchain; addr != NULL; addr = *paddr)
6300 {
6301 if (print_address_information(addr, f, US" ", US"\n ", US""))
6302 print_address_error(addr, f, US"");
6303
6304 /* End the final line for the address */
6305
6306 fputc('\n', f);
6307
6308 /* Leave on msgchain if there's a return file. */
6309
6310 if (addr->return_file >= 0)
6311 {
6312 paddr = &(addr->next);
6313 filecount++;
6314 }
6315
6316 /* Else save so that we can tick off the recipient when the
6317 message is sent. */
6318
6319 else
6320 {
6321 *paddr = addr->next;
6322 addr->next = handled_addr;
6323 handled_addr = addr;
6324 }
6325 }
6326
6327 fprintf(f, "\n");
6328
6329 /* Get the next text, whether we need it or not, so as to be
6330 positioned for the one after. */
6331
6332 emf_text = next_emf(emf, US"generated text");
6333
6334 /* If there were any file messages passed by the local transports,
6335 include them in the message. Then put the address on the handled chain.
6336 In the case of a batch of addresses that were all sent to the same
6337 transport, the return_file field in all of them will contain the same
6338 fd, and the return_filename field in the *last* one will be set (to the
6339 name of the file). */
6340
6341 if (msgchain != NULL)
6342 {
6343 address_item *nextaddr;
6344
6345 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6346 fprintf(f,
6347 "The following text was generated during the delivery "
6348 "attempt%s:\n", (filecount > 1)? "s" : "");
6349
6350 for (addr = msgchain; addr != NULL; addr = nextaddr)
6351 {
6352 FILE *fm;
6353 address_item *topaddr = addr;
6354
6355 /* List all the addresses that relate to this file */
6356
6357 fprintf(f, "\n");
6358 while(addr != NULL) /* Insurance */
6359 {
6360 print_address_information(addr, f, US"------ ", US"\n ",
6361 US" ------\n");
6362 if (addr->return_filename != NULL) break;
6363 addr = addr->next;
6364 }
6365 fprintf(f, "\n");
6366
6367 /* Now copy the file */
6368
6369 fm = Ufopen(addr->return_filename, "rb");
6370
6371 if (fm == NULL)
6372 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
6373 strerror(errno));
6374 else
6375 {
6376 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
6377 (void)fclose(fm);
6378 }
6379 Uunlink(addr->return_filename);
6380
6381 /* Can now add to handled chain, first fishing off the next
6382 address on the msgchain. */
6383
6384 nextaddr = addr->next;
6385 addr->next = handled_addr;
6386 handled_addr = topaddr;
6387 }
6388 fprintf(f, "\n");
6389 }
6390
6391 /* Now copy the message, trying to give an intelligible comment if
6392 it is too long for it all to be copied. The limit isn't strictly
6393 applied because of the buffering. There is, however, an option
6394 to suppress copying altogether. */
6395
6396 emf_text = next_emf(emf, US"copy");
6397
6398 if (bounce_return_message)
6399 {
6400 int topt = topt_add_return_path;
6401 if (!bounce_return_body) topt |= topt_no_body;
6402
6403 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6404 {
6405 if (bounce_return_body) fprintf(f,
6406 "------ This is a copy of the message, including all the headers. ------\n");
6407 else fprintf(f,
6408 "------ This is a copy of the message's headers. ------\n");
6409 }
6410
6411 /* While reading the "truncated" message, set return_size_limit to
6412 the actual max testing value, rounded. We need to read the message
6413 whether we are going to use it or not. */
6414
6415 {
6416 int temp = bounce_return_size_limit;
6417 bounce_return_size_limit = (max/1000)*1000;
6418 emf_text = next_emf(emf, US"truncated");
6419 bounce_return_size_limit = temp;
6420 }
6421
6422 if (bounce_return_body && bounce_return_size_limit > 0)
6423 {
6424 struct stat statbuf;
6425 if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max)
6426 {
6427 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6428 {
6429 fprintf(f,
6430 "------ The body of the message is " OFF_T_FMT " characters long; only the first\n"
6431 "------ %d or so are included here.\n", statbuf.st_size, max);
6432 }
6433 }
6434 }
6435
6436 fprintf(f, "\n");
6437 fflush(f);
6438 transport_filter_argv = NULL; /* Just in case */
6439 return_path = sender_address; /* In case not previously set */
6440 transport_write_message(NULL, fileno(f), topt,
6441 bounce_return_size_limit, NULL, NULL, NULL, NULL, NULL, 0);
6442 }
6443
6444 /* Write final text and close the template file if one is open */
6445
6446 if (emf != NULL)
6447 {
6448 emf_text = next_emf(emf, US"final");
6449 if (emf_text != NULL) fprintf(f, "%s", CS emf_text);
6450 (void)fclose(emf);
6451 }
6452
6453 /* Close the file, which should send an EOF to the child process
6454 that is receiving the message. Wait for it to finish. */
6455
6456 (void)fclose(f);
6457 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
6458
6459 /* In the test harness, let the child do it's thing first. */
6460
6461 if (running_in_test_harness) millisleep(500);
6462
6463 /* If the process failed, there was some disaster in setting up the
6464 error message. Unless the message is very old, ensure that addr_defer
6465 is non-null, which will have the effect of leaving the message on the
6466 spool. The failed addresses will get tried again next time. However, we
6467 don't really want this to happen too often, so freeze the message unless
6468 there are some genuine deferred addresses to try. To do this we have
6469 to call spool_write_header() here, because with no genuine deferred
6470 addresses the normal code below doesn't get run. */
6471
6472 if (rc != 0)
6473 {
6474 uschar *s = US"";
6475 if (now - received_time < retry_maximum_timeout && addr_defer == NULL)
6476 {
6477 addr_defer = (address_item *)(+1);
6478 deliver_freeze = TRUE;
6479 deliver_frozen_at = time(NULL);
6480 /* Panic-dies on error */
6481 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6482 s = US" (frozen)";
6483 }
6484 deliver_msglog("Process failed (%d) when writing error message "
6485 "to %s%s", rc, bounce_recipient, s);
6486 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
6487 "to %s%s", rc, bounce_recipient, s);
6488 }
6489
6490 /* The message succeeded. Ensure that the recipients that failed are
6491 now marked finished with on the spool and their parents updated. */
6492
6493 else
6494 {
6495 for (addr = handled_addr; addr != NULL; addr = addr->next)
6496 {
6497 address_done(addr, logtod);
6498 child_done(addr, logtod);
6499 }
6500 /* Panic-dies on error */
6501 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6502 }
6503 }
6504 }
6505 }
6506
6507 disable_logging = FALSE; /* In case left set */
6508
6509 /* Come here from the mua_wrapper case if routing goes wrong */
6510
6511 DELIVERY_TIDYUP:
6512
6513 /* If there are now no deferred addresses, we are done. Preserve the
6514 message log if so configured, and we are using them. Otherwise, sling it.
6515 Then delete the message itself. */
6516
6517 if (addr_defer == NULL)
6518 {
6519 if (message_logs)
6520 {
6521 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir,
6522 id);
6523 if (preserve_message_logs)
6524 {
6525 int rc;
6526 sprintf(CS big_buffer, "%s/msglog.OLD/%s", spool_directory, id);
6527 if ((rc = Urename(spoolname, big_buffer)) < 0)
6528 {
6529 (void)directory_make(spool_directory, US"msglog.OLD",
6530 MSGLOG_DIRECTORY_MODE, TRUE);
6531 rc = Urename(spoolname, big_buffer);
6532 }
6533 if (rc < 0)
6534 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
6535 "msglog.OLD directory", spoolname);
6536 }
6537 else
6538 {
6539 if (Uunlink(spoolname) < 0)
6540 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s", spoolname);
6541 }
6542 }
6543
6544 /* Remove the two message files. */
6545
6546 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
6547 if (Uunlink(spoolname) < 0)
6548 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s", spoolname);
6549 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
6550 if (Uunlink(spoolname) < 0)
6551 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s", spoolname);
6552
6553 /* Log the end of this message, with queue time if requested. */
6554
6555 if ((log_extra_selector & LX_queue_time_overall) != 0)
6556 log_write(0, LOG_MAIN, "Completed QT=%s",
6557 readconf_printtime(time(NULL) - received_time));
6558 else
6559 log_write(0, LOG_MAIN, "Completed");
6560 }
6561
6562 /* If there are deferred addresses, we are keeping this message because it is
6563 not yet completed. Lose any temporary files that were catching output from
6564 pipes for any of the deferred addresses, handle one-time aliases, and see if
6565 the message has been on the queue for so long that it is time to send a warning
6566 message to the sender, unless it is a mailer-daemon. If all deferred addresses
6567 have the same domain, we can set deliver_domain for the expansion of
6568 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
6569 the parent's domain.
6570
6571 If all the deferred addresses have an error number that indicates "retry time
6572 not reached", skip sending the warning message, because it won't contain the
6573 reason for the delay. It will get sent at the next real delivery attempt.
6574 However, if at least one address has tried, we'd better include all of them in
6575 the message.
6576
6577 If we can't make a process to send the message, don't worry.
6578
6579 For mailing list expansions we want to send the warning message to the
6580 mailing list manager. We can't do a perfect job here, as some addresses may
6581 have different errors addresses, but if we take the errors address from
6582 each deferred address it will probably be right in most cases.
6583
6584 If addr_defer == +1, it means there was a problem sending an error message
6585 for failed addresses, and there were no "real" deferred addresses. The value
6586 was set just to keep the message on the spool, so there is nothing to do here.
6587 */
6588
6589 else if (addr_defer != (address_item *)(+1))
6590 {
6591 address_item *addr;
6592 uschar *recipients = US"";
6593 BOOL delivery_attempted = FALSE;
6594
6595 deliver_domain = testflag(addr_defer, af_pfr)?
6596 addr_defer->parent->domain : addr_defer->domain;
6597
6598 for (addr = addr_defer; addr != NULL; addr = addr->next)
6599 {
6600 address_item *otaddr;
6601
6602 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
6603
6604 if (deliver_domain != NULL)
6605 {
6606 uschar *d = (testflag(addr, af_pfr))? addr->parent->domain : addr->domain;
6607
6608 /* The domain may be unset for an address that has never been routed
6609 because the system filter froze the message. */
6610
6611 if (d == NULL || Ustrcmp(d, deliver_domain) != 0) deliver_domain = NULL;
6612 }
6613
6614 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
6615
6616 /* Handle the case of one-time aliases. If any address in the ancestry
6617 of this one is flagged, ensure it is in the recipients list, suitably
6618 flagged, and that its parent is marked delivered. */
6619
6620 for (otaddr = addr; otaddr != NULL; otaddr = otaddr->parent)
6621 if (otaddr->onetime_parent != NULL) break;
6622
6623 if (otaddr != NULL)
6624 {
6625 int i;
6626 int t = recipients_count;
6627
6628 for (i = 0; i < recipients_count; i++)
6629 {
6630 uschar *r = recipients_list[i].address;
6631 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
6632 if (Ustrcmp(otaddr->address, r) == 0) break;
6633 }
6634
6635 /* Didn't find the address already in the list, and did find the
6636 ultimate parent's address in the list. After adding the recipient,
6637 update the errors address in the recipients list. */
6638
6639 if (i >= recipients_count && t < recipients_count)
6640 {
6641 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
6642 otaddr->address, otaddr->parent->address);
6643 receive_add_recipient(otaddr->address, t);
6644 recipients_list[recipients_count-1].errors_to = otaddr->p.errors_address;
6645 tree_add_nonrecipient(otaddr->parent->address);
6646 update_spool = TRUE;
6647 }
6648 }
6649
6650 /* Except for error messages, ensure that either the errors address for
6651 this deferred address or, if there is none, the sender address, is on the
6652 list of recipients for a warning message. */
6653
6654 if (sender_address[0] != 0)
6655 {
6656 if (addr->p.errors_address == NULL)
6657 {
6658 if (Ustrstr(recipients, sender_address) == NULL)
6659 recipients = string_sprintf("%s%s%s", recipients,
6660 (recipients[0] == 0)? "" : ",", sender_address);
6661 }
6662 else
6663 {
6664 if (Ustrstr(recipients, addr->p.errors_address) == NULL)
6665 recipients = string_sprintf("%s%s%s", recipients,
6666 (recipients[0] == 0)? "" : ",", addr->p.errors_address);
6667 }
6668 }
6669 }
6670
6671 /* Send a warning message if the conditions are right. If the condition check
6672 fails because of a lookup defer, there is nothing we can do. The warning
6673 is not sent. Another attempt will be made at the next delivery attempt (if
6674 it also defers). */
6675
6676 if (!queue_2stage && delivery_attempted &&
6677 delay_warning[1] > 0 && sender_address[0] != 0 &&
6678 (delay_warning_condition == NULL ||
6679 expand_check_condition(delay_warning_condition,
6680 US"delay_warning", US"option")))
6681 {
6682 int count;
6683 int show_time;
6684 int queue_time = time(NULL) - received_time;
6685
6686 /* When running in the test harness, there's an option that allows us to
6687 fudge this time so as to get repeatability of the tests. Take the first
6688 time off the list. In queue runs, the list pointer gets updated in the
6689 calling process. */
6690
6691 if (running_in_test_harness && fudged_queue_times[0] != 0)
6692 {
6693 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
6694 if (qt >= 0)
6695 {
6696 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
6697 fudged_queue_times);
6698 queue_time = qt;
6699 }
6700 }
6701
6702 /* See how many warnings we should have sent by now */
6703
6704 for (count = 0; count < delay_warning[1]; count++)
6705 if (queue_time < delay_warning[count+2]) break;
6706
6707 show_time = delay_warning[count+1];
6708
6709 if (count >= delay_warning[1])
6710 {
6711 int extra;
6712 int last_gap = show_time;
6713 if (count > 1) last_gap -= delay_warning[count];
6714 extra = (queue_time - delay_warning[count+1])/last_gap;
6715 show_time += last_gap * extra;
6716 count += extra;
6717 }
6718
6719 DEBUG(D_deliver)
6720 {
6721 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
6722 debug_printf("warning counts: required %d done %d\n", count,
6723 warning_count);
6724 }
6725
6726 /* We have computed the number of warnings there should have been by now.
6727 If there haven't been enough, send one, and up the count to what it should
6728 have been. */
6729
6730 if (warning_count < count)
6731 {
6732 header_line *h;
6733 int fd;
6734 pid_t pid = child_open_exim(&fd);
6735
6736 if (pid > 0)
6737 {
6738 uschar *wmf_text;
6739 FILE *wmf = NULL;
6740 FILE *f = fdopen(fd, "wb");
6741
6742 if (warn_message_file != NULL)
6743 {
6744 wmf = Ufopen(warn_message_file, "rb");
6745 if (wmf == NULL)
6746 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
6747 "message texts: %s", warn_message_file, strerror(errno));
6748 }
6749
6750 warnmsg_recipients = recipients;
6751 warnmsg_delay = (queue_time < 120*60)?
6752 string_sprintf("%d minutes", show_time/60):
6753 string_sprintf("%d hours", show_time/3600);
6754
6755 if (errors_reply_to != NULL)
6756 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6757 fprintf(f, "Auto-Submitted: auto-replied\n");
6758 fprintf(f, "From: Mail Delivery System <Mailer-Daemon@%s>\n",
6759 qualify_domain_sender);
6760 fprintf(f, "To: %s\n", recipients);
6761
6762 wmf_text = next_emf(wmf, US"header");
6763 if (wmf_text != NULL)
6764 fprintf(f, "%s\n", wmf_text);
6765 else
6766 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
6767 message_id, warnmsg_delay);
6768
6769 wmf_text = next_emf(wmf, US"intro");
6770 if (wmf_text != NULL) fprintf(f, "%s", CS wmf_text); else
6771 {
6772 fprintf(f,
6773 "This message was created automatically by mail delivery software.\n");
6774
6775 if (Ustrcmp(recipients, sender_address) == 0)
6776 fprintf(f,
6777 "A message that you sent has not yet been delivered to one or more of its\n"
6778 "recipients after more than ");
6779
6780 else fprintf(f,
6781 "A message sent by\n\n <%s>\n\n"
6782 "has not yet been delivered to one or more of its recipients after more than \n",
6783 sender_address);
6784
6785 fprintf(f, "%s on the queue on %s.\n\n", warnmsg_delay,
6786 primary_hostname);
6787 fprintf(f, "The message identifier is: %s\n", message_id);
6788
6789 for (h = header_list; h != NULL; h = h->next)
6790 {
6791 if (strncmpic(h->text, US"Subject:", 8) == 0)
6792 fprintf(f, "The subject of the message is: %s", h->text + 9);
6793 else if (strncmpic(h->text, US"Date:", 5) == 0)
6794 fprintf(f, "The date of the message is: %s", h->text + 6);
6795 }
6796 fprintf(f, "\n");
6797
6798 fprintf(f, "The address%s to which the message has not yet been "
6799 "delivered %s:\n",
6800 (addr_defer->next == NULL)? "" : "es",
6801 (addr_defer->next == NULL)? "is": "are");
6802 }
6803
6804 /* List the addresses, with error information if allowed */
6805
6806 fprintf(f, "\n");
6807 while (addr_defer != NULL)
6808 {
6809 address_item *addr = addr_defer;
6810 addr_defer = addr->next;
6811 if (print_address_information(addr, f, US" ", US"\n ", US""))
6812 print_address_error(addr, f, US"Delay reason: ");
6813 fprintf(f, "\n");
6814 }
6815 fprintf(f, "\n");
6816
6817 /* Final text */
6818
6819 if (wmf != NULL)
6820 {
6821 wmf_text = next_emf(wmf, US"final");
6822 if (wmf_text != NULL) fprintf(f, "%s", CS wmf_text);
6823 (void)fclose(wmf);
6824 }
6825 else
6826 {
6827 fprintf(f,
6828 "No action is required on your part. Delivery attempts will continue for\n"
6829 "some time, and this warning may be repeated at intervals if the message\n"
6830 "remains undelivered. Eventually the mail delivery software will give up,\n"
6831 "and when that happens, the message will be returned to you.\n");
6832 }
6833
6834 /* Close and wait for child process to complete, without a timeout.
6835 If there's an error, don't update the count. */
6836
6837 (void)fclose(f);
6838 if (child_close(pid, 0) == 0)
6839 {
6840 warning_count = count;
6841 update_spool = TRUE; /* Ensure spool rewritten */
6842 }
6843 }
6844 }
6845 }
6846
6847 /* Clear deliver_domain */
6848
6849 deliver_domain = NULL;
6850
6851 /* If this was a first delivery attempt, unset the first time flag, and
6852 ensure that the spool gets updated. */
6853
6854 if (deliver_firsttime)
6855 {
6856 deliver_firsttime = FALSE;
6857 update_spool = TRUE;
6858 }
6859
6860 /* If delivery was frozen and freeze_tell is set, generate an appropriate
6861 message, unless the message is a local error message (to avoid loops). Then
6862 log the freezing. If the text in "frozen_info" came from a system filter,
6863 it has been escaped into printing characters so as not to mess up log lines.
6864 For the "tell" message, we turn \n back into newline. Also, insert a newline
6865 near the start instead of the ": " string. */
6866
6867 if (deliver_freeze)
6868 {
6869 if (freeze_tell != NULL && freeze_tell[0] != 0 && !local_error_message)
6870 {
6871 uschar *s = string_copy(frozen_info);
6872 uschar *ss = Ustrstr(s, " by the system filter: ");
6873
6874 if (ss != NULL)
6875 {
6876 ss[21] = '.';
6877 ss[22] = '\n';
6878 }
6879
6880 ss = s;
6881 while (*ss != 0)
6882 {
6883 if (*ss == '\\' && ss[1] == 'n')
6884 {
6885 *ss++ = ' ';
6886 *ss++ = '\n';
6887 }
6888 else ss++;
6889 }
6890 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
6891 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
6892 s, sender_address);
6893 }
6894
6895 /* Log freezing just before we update the -H file, to minimize the chance
6896 of a race problem. */
6897
6898 deliver_msglog("*** Frozen%s\n", frozen_info);
6899 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
6900 }
6901
6902 /* If there have been any updates to the non-recipients list, or other things
6903 that get written to the spool, we must now update the spool header file so
6904 that it has the right information for the next delivery attempt. If there
6905 was more than one address being delivered, the header_change update is done
6906 earlier, in case one succeeds and then something crashes. */
6907
6908 DEBUG(D_deliver)
6909 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
6910 update_spool, header_rewritten);
6911
6912 if (update_spool || header_rewritten)
6913 /* Panic-dies on error */
6914 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6915 }
6916
6917 /* Finished with the message log. If the message is complete, it will have
6918 been unlinked or renamed above. */
6919
6920 if (message_logs) (void)fclose(message_log);
6921
6922 /* Now we can close and remove the journal file. Its only purpose is to record
6923 successfully completed deliveries asap so that this information doesn't get
6924 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
6925 not serious, as trying it again is not harmful. The journal might not be open
6926 if all addresses were deferred at routing or directing. Nevertheless, we must
6927 remove it if it exists (may have been lying around from a crash during the
6928 previous delivery attempt). We don't remove the journal if a delivery
6929 subprocess failed to pass back delivery information; this is controlled by
6930 the remove_journal flag. When the journal is left, we also don't move the
6931 message off the main spool if frozen and the option is set. It should get moved
6932 at the next attempt, after the journal has been inspected. */
6933
6934 if (journal_fd >= 0) (void)close(journal_fd);
6935
6936 if (remove_journal)
6937 {
6938 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
6939 if (Uunlink(spoolname) < 0 && errno != ENOENT)
6940 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", spoolname,
6941 strerror(errno));
6942
6943 /* Move the message off the spool if reqested */
6944
6945 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
6946 if (deliver_freeze && move_frozen_messages)
6947 (void)spool_move_message(id, message_subdir, US"", US"F");
6948 #endif
6949 }
6950
6951 /* Closing the data file frees the lock; if the file has been unlinked it
6952 will go away. Otherwise the message becomes available for another process
6953 to try delivery. */
6954
6955 (void)close(deliver_datafile);
6956 deliver_datafile = -1;
6957 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
6958
6959 /* It is unlikely that there will be any cached resources, since they are
6960 released after routing, and in the delivery subprocesses. However, it's
6961 possible for an expansion for something afterwards (for example,
6962 expand_check_condition) to do a lookup. We must therefore be sure everything is
6963 released. */
6964
6965 search_tidyup();
6966 return final_yield;
6967 }
6968
6969 /* End of deliver.c */