Basic cutthrough delivery.
[exim.git] / src / src / deliver.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2009 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* The main code for delivering a message. */
9
10
11 #include "exim.h"
12
13
14 /* Data block for keeping track of subprocesses for parallel remote
15 delivery. */
16
17 typedef struct pardata {
18 address_item *addrlist; /* chain of addresses */
19 address_item *addr; /* next address data expected for */
20 pid_t pid; /* subprocess pid */
21 int fd; /* pipe fd for getting result from subprocess */
22 int transport_count; /* returned transport count value */
23 BOOL done; /* no more data needed */
24 uschar *msg; /* error message */
25 uschar *return_path; /* return_path for these addresses */
26 } pardata;
27
28 /* Values for the process_recipients variable */
29
30 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
31 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
32 RECIP_FAIL_LOOP};
33
34 /* Mutually recursive functions for marking addresses done. */
35
36 static void child_done(address_item *, uschar *);
37 static void address_done(address_item *, uschar *);
38
39 /* Table for turning base-62 numbers into binary */
40
41 static uschar tab62[] =
42 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
43 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
44 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
45 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
46 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
47 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
48 59,60,61}; /* x-z */
49
50
51 /*************************************************
52 * Local static variables *
53 *************************************************/
54
55 /* addr_duplicate is global because it needs to be seen from the Envelope-To
56 writing code. */
57
58 static address_item *addr_defer = NULL;
59 static address_item *addr_failed = NULL;
60 static address_item *addr_fallback = NULL;
61 static address_item *addr_local = NULL;
62 static address_item *addr_new = NULL;
63 static address_item *addr_remote = NULL;
64 static address_item *addr_route = NULL;
65 static address_item *addr_succeed = NULL;
66
67 static FILE *message_log = NULL;
68 static BOOL update_spool;
69 static BOOL remove_journal;
70 static int parcount = 0;
71 static pardata *parlist = NULL;
72 static int return_count;
73 static uschar *frozen_info = US"";
74 static uschar *used_return_path = NULL;
75
76 static uschar spoolname[PATH_MAX];
77
78
79
80 /*************************************************
81 * Make a new address item *
82 *************************************************/
83
84 /* This function gets the store and initializes with default values. The
85 transport_return value defaults to DEFER, so that any unexpected failure to
86 deliver does not wipe out the message. The default unique string is set to a
87 copy of the address, so that its domain can be lowercased.
88
89 Argument:
90 address the RFC822 address string
91 copy force a copy of the address
92
93 Returns: a pointer to an initialized address_item
94 */
95
96 address_item *
97 deliver_make_addr(uschar *address, BOOL copy)
98 {
99 address_item *addr = store_get(sizeof(address_item));
100 *addr = address_defaults;
101 if (copy) address = string_copy(address);
102 addr->address = address;
103 addr->unique = string_copy(address);
104 return addr;
105 }
106
107
108
109
110 /*************************************************
111 * Set expansion values for an address *
112 *************************************************/
113
114 /* Certain expansion variables are valid only when handling an address or
115 address list. This function sets them up or clears the values, according to its
116 argument.
117
118 Arguments:
119 addr the address in question, or NULL to clear values
120 Returns: nothing
121 */
122
123 void
124 deliver_set_expansions(address_item *addr)
125 {
126 if (addr == NULL)
127 {
128 uschar ***p = address_expansions;
129 while (*p != NULL) **p++ = NULL;
130 return;
131 }
132
133 /* Exactly what gets set depends on whether there is one or more addresses, and
134 what they contain. These first ones are always set, taking their values from
135 the first address. */
136
137 if (addr->host_list == NULL)
138 {
139 deliver_host = deliver_host_address = US"";
140 }
141 else
142 {
143 deliver_host = addr->host_list->name;
144 deliver_host_address = addr->host_list->address;
145 }
146
147 deliver_recipients = addr;
148 deliver_address_data = addr->p.address_data;
149 deliver_domain_data = addr->p.domain_data;
150 deliver_localpart_data = addr->p.localpart_data;
151
152 /* These may be unset for multiple addresses */
153
154 deliver_domain = addr->domain;
155 self_hostname = addr->self_hostname;
156
157 #ifdef EXPERIMENTAL_BRIGHTMAIL
158 bmi_deliver = 1; /* deliver by default */
159 bmi_alt_location = NULL;
160 bmi_base64_verdict = NULL;
161 bmi_base64_tracker_verdict = NULL;
162 #endif
163
164 /* If there's only one address we can set everything. */
165
166 if (addr->next == NULL)
167 {
168 address_item *addr_orig;
169
170 deliver_localpart = addr->local_part;
171 deliver_localpart_prefix = addr->prefix;
172 deliver_localpart_suffix = addr->suffix;
173
174 for (addr_orig = addr; addr_orig->parent != NULL;
175 addr_orig = addr_orig->parent);
176 deliver_domain_orig = addr_orig->domain;
177
178 /* Re-instate any prefix and suffix in the original local part. In all
179 normal cases, the address will have a router associated with it, and we can
180 choose the caseful or caseless version accordingly. However, when a system
181 filter sets up a pipe, file, or autoreply delivery, no router is involved.
182 In this case, though, there won't be any prefix or suffix to worry about. */
183
184 deliver_localpart_orig = (addr_orig->router == NULL)? addr_orig->local_part :
185 addr_orig->router->caseful_local_part?
186 addr_orig->cc_local_part : addr_orig->lc_local_part;
187
188 /* If there's a parent, make its domain and local part available, and if
189 delivering to a pipe or file, or sending an autoreply, get the local
190 part from the parent. For pipes and files, put the pipe or file string
191 into address_pipe and address_file. */
192
193 if (addr->parent != NULL)
194 {
195 deliver_domain_parent = addr->parent->domain;
196 deliver_localpart_parent = (addr->parent->router == NULL)?
197 addr->parent->local_part :
198 addr->parent->router->caseful_local_part?
199 addr->parent->cc_local_part : addr->parent->lc_local_part;
200
201 /* File deliveries have their own flag because they need to be picked out
202 as special more often. */
203
204 if (testflag(addr, af_pfr))
205 {
206 if (testflag(addr, af_file)) address_file = addr->local_part;
207 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
208 deliver_localpart = addr->parent->local_part;
209 deliver_localpart_prefix = addr->parent->prefix;
210 deliver_localpart_suffix = addr->parent->suffix;
211 }
212 }
213
214 #ifdef EXPERIMENTAL_BRIGHTMAIL
215 /* Set expansion variables related to Brightmail AntiSpam */
216 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
217 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
218 /* get message delivery status (0 - don't deliver | 1 - deliver) */
219 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
220 /* if message is to be delivered, get eventual alternate location */
221 if (bmi_deliver == 1) {
222 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
223 };
224 #endif
225
226 }
227
228 /* For multiple addresses, don't set local part, and leave the domain and
229 self_hostname set only if it is the same for all of them. It is possible to
230 have multiple pipe and file addresses, but only when all addresses have routed
231 to the same pipe or file. */
232
233 else
234 {
235 address_item *addr2;
236 if (testflag(addr, af_pfr))
237 {
238 if (testflag(addr, af_file)) address_file = addr->local_part;
239 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
240 }
241 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
242 {
243 if (deliver_domain != NULL &&
244 Ustrcmp(deliver_domain, addr2->domain) != 0)
245 deliver_domain = NULL;
246 if (self_hostname != NULL && (addr2->self_hostname == NULL ||
247 Ustrcmp(self_hostname, addr2->self_hostname) != 0))
248 self_hostname = NULL;
249 if (deliver_domain == NULL && self_hostname == NULL) break;
250 }
251 }
252 }
253
254
255
256
257 /*************************************************
258 * Open a msglog file *
259 *************************************************/
260
261 /* This function is used both for normal message logs, and for files in the
262 msglog directory that are used to catch output from pipes. Try to create the
263 directory if it does not exist. From release 4.21, normal message logs should
264 be created when the message is received.
265
266 Argument:
267 filename the file name
268 mode the mode required
269 error used for saying what failed
270
271 Returns: a file descriptor, or -1 (with errno set)
272 */
273
274 static int
275 open_msglog_file(uschar *filename, int mode, uschar **error)
276 {
277 int fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
278
279 if (fd < 0 && errno == ENOENT)
280 {
281 uschar temp[16];
282 sprintf(CS temp, "msglog/%s", message_subdir);
283 if (message_subdir[0] == 0) temp[6] = 0;
284 (void)directory_make(spool_directory, temp, MSGLOG_DIRECTORY_MODE, TRUE);
285 fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
286 }
287
288 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
289 function is called as root). Double check the mode, because the group setting
290 doesn't always get set automatically. */
291
292 if (fd >= 0)
293 {
294 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
295 if (fchown(fd, exim_uid, exim_gid) < 0)
296 {
297 *error = US"chown";
298 return -1;
299 }
300 if (fchmod(fd, mode) < 0)
301 {
302 *error = US"chmod";
303 return -1;
304 }
305 }
306 else *error = US"create";
307
308 return fd;
309 }
310
311
312
313
314 /*************************************************
315 * Write to msglog if required *
316 *************************************************/
317
318 /* Write to the message log, if configured. This function may also be called
319 from transports.
320
321 Arguments:
322 format a string format
323
324 Returns: nothing
325 */
326
327 void
328 deliver_msglog(const char *format, ...)
329 {
330 va_list ap;
331 if (!message_logs) return;
332 va_start(ap, format);
333 vfprintf(message_log, format, ap);
334 fflush(message_log);
335 va_end(ap);
336 }
337
338
339
340
341 /*************************************************
342 * Replicate status for batch *
343 *************************************************/
344
345 /* When a transport handles a batch of addresses, it may treat them
346 individually, or it may just put the status in the first one, and return FALSE,
347 requesting that the status be copied to all the others externally. This is the
348 replication function. As well as the status, it copies the transport pointer,
349 which may have changed if appendfile passed the addresses on to a different
350 transport.
351
352 Argument: pointer to the first address in a chain
353 Returns: nothing
354 */
355
356 static void
357 replicate_status(address_item *addr)
358 {
359 address_item *addr2;
360 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
361 {
362 addr2->transport = addr->transport;
363 addr2->transport_return = addr->transport_return;
364 addr2->basic_errno = addr->basic_errno;
365 addr2->more_errno = addr->more_errno;
366 addr2->special_action = addr->special_action;
367 addr2->message = addr->message;
368 addr2->user_message = addr->user_message;
369 }
370 }
371
372
373
374 /*************************************************
375 * Compare lists of hosts *
376 *************************************************/
377
378 /* This function is given two pointers to chains of host items, and it yields
379 TRUE if the lists refer to the same hosts in the same order, except that
380
381 (1) Multiple hosts with the same non-negative MX values are permitted to appear
382 in different orders. Round-robinning nameservers can cause this to happen.
383
384 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
385 permitted to appear in different orders. This is caused by randomizing
386 hosts lists.
387
388 This enables Exim to use a single SMTP transaction for sending to two entirely
389 different domains that happen to end up pointing at the same hosts.
390
391 Arguments:
392 one points to the first host list
393 two points to the second host list
394
395 Returns: TRUE if the lists refer to the same host set
396 */
397
398 static BOOL
399 same_hosts(host_item *one, host_item *two)
400 {
401 while (one != NULL && two != NULL)
402 {
403 if (Ustrcmp(one->name, two->name) != 0)
404 {
405 int mx = one->mx;
406 host_item *end_one = one;
407 host_item *end_two = two;
408
409 /* Batch up only if there was no MX and the list was not randomized */
410
411 if (mx == MX_NONE) return FALSE;
412
413 /* Find the ends of the shortest sequence of identical MX values */
414
415 while (end_one->next != NULL && end_one->next->mx == mx &&
416 end_two->next != NULL && end_two->next->mx == mx)
417 {
418 end_one = end_one->next;
419 end_two = end_two->next;
420 }
421
422 /* If there aren't any duplicates, there's no match. */
423
424 if (end_one == one) return FALSE;
425
426 /* For each host in the 'one' sequence, check that it appears in the 'two'
427 sequence, returning FALSE if not. */
428
429 for (;;)
430 {
431 host_item *hi;
432 for (hi = two; hi != end_two->next; hi = hi->next)
433 if (Ustrcmp(one->name, hi->name) == 0) break;
434 if (hi == end_two->next) return FALSE;
435 if (one == end_one) break;
436 one = one->next;
437 }
438
439 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
440 Ensure both are pointing at the last host, and carry on as for equality. */
441
442 two = end_two;
443 }
444
445 /* Hosts matched */
446
447 one = one->next;
448 two = two->next;
449 }
450
451 /* True if both are NULL */
452
453 return (one == two);
454 }
455
456
457
458 /*************************************************
459 * Compare header lines *
460 *************************************************/
461
462 /* This function is given two pointers to chains of header items, and it yields
463 TRUE if they are the same header texts in the same order.
464
465 Arguments:
466 one points to the first header list
467 two points to the second header list
468
469 Returns: TRUE if the lists refer to the same header set
470 */
471
472 static BOOL
473 same_headers(header_line *one, header_line *two)
474 {
475 for (;;)
476 {
477 if (one == two) return TRUE; /* Includes the case where both NULL */
478 if (one == NULL || two == NULL) return FALSE;
479 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
480 one = one->next;
481 two = two->next;
482 }
483 }
484
485
486
487 /*************************************************
488 * Compare string settings *
489 *************************************************/
490
491 /* This function is given two pointers to strings, and it returns
492 TRUE if they are the same pointer, or if the two strings are the same.
493
494 Arguments:
495 one points to the first string
496 two points to the second string
497
498 Returns: TRUE or FALSE
499 */
500
501 static BOOL
502 same_strings(uschar *one, uschar *two)
503 {
504 if (one == two) return TRUE; /* Includes the case where both NULL */
505 if (one == NULL || two == NULL) return FALSE;
506 return (Ustrcmp(one, two) == 0);
507 }
508
509
510
511 /*************************************************
512 * Compare uid/gid for addresses *
513 *************************************************/
514
515 /* This function is given a transport and two addresses. It yields TRUE if the
516 uid/gid/initgroups settings for the two addresses are going to be the same when
517 they are delivered.
518
519 Arguments:
520 tp the transort
521 addr1 the first address
522 addr2 the second address
523
524 Returns: TRUE or FALSE
525 */
526
527 static BOOL
528 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
529 {
530 if (!tp->uid_set && tp->expand_uid == NULL && !tp->deliver_as_creator)
531 {
532 if (testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set) ||
533 (testflag(addr1, af_uid_set) &&
534 (addr1->uid != addr2->uid ||
535 testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups))))
536 return FALSE;
537 }
538
539 if (!tp->gid_set && tp->expand_gid == NULL)
540 {
541 if (testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set) ||
542 (testflag(addr1, af_gid_set) && addr1->gid != addr2->gid))
543 return FALSE;
544 }
545
546 return TRUE;
547 }
548
549
550
551
552 /*************************************************
553 * Record that an address is complete *
554 *************************************************/
555
556 /* This function records that an address is complete. This is straightforward
557 for most addresses, where the unique address is just the full address with the
558 domain lower cased. For homonyms (addresses that are the same as one of their
559 ancestors) their are complications. Their unique addresses have \x\ prepended
560 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
561 cousins.
562
563 Exim used to record the unique addresses of homonyms as "complete". This,
564 however, fails when the pattern of redirection varies over time (e.g. if taking
565 unseen copies at only some times of day) because the prepended numbers may vary
566 from one delivery run to the next. This problem is solved by never recording
567 prepended unique addresses as complete. Instead, when a homonymic address has
568 actually been delivered via a transport, we record its basic unique address
569 followed by the name of the transport. This is checked in subsequent delivery
570 runs whenever an address is routed to a transport.
571
572 If the completed address is a top-level one (has no parent, which means it
573 cannot be homonymic) we also add the original address to the non-recipients
574 tree, so that it gets recorded in the spool file and therefore appears as
575 "done" in any spool listings. The original address may differ from the unique
576 address in the case of the domain.
577
578 Finally, this function scans the list of duplicates, marks as done any that
579 match this address, and calls child_done() for their ancestors.
580
581 Arguments:
582 addr address item that has been completed
583 now current time as a string
584
585 Returns: nothing
586 */
587
588 static void
589 address_done(address_item *addr, uschar *now)
590 {
591 address_item *dup;
592
593 update_spool = TRUE; /* Ensure spool gets updated */
594
595 /* Top-level address */
596
597 if (addr->parent == NULL)
598 {
599 tree_add_nonrecipient(addr->unique);
600 tree_add_nonrecipient(addr->address);
601 }
602
603 /* Homonymous child address */
604
605 else if (testflag(addr, af_homonym))
606 {
607 if (addr->transport != NULL)
608 {
609 tree_add_nonrecipient(
610 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
611 }
612 }
613
614 /* Non-homonymous child address */
615
616 else tree_add_nonrecipient(addr->unique);
617
618 /* Check the list of duplicate addresses and ensure they are now marked
619 done as well. */
620
621 for (dup = addr_duplicate; dup != NULL; dup = dup->next)
622 {
623 if (Ustrcmp(addr->unique, dup->unique) == 0)
624 {
625 tree_add_nonrecipient(dup->unique);
626 child_done(dup, now);
627 }
628 }
629 }
630
631
632
633
634 /*************************************************
635 * Decrease counts in parents and mark done *
636 *************************************************/
637
638 /* This function is called when an address is complete. If there is a parent
639 address, its count of children is decremented. If there are still other
640 children outstanding, the function exits. Otherwise, if the count has become
641 zero, address_done() is called to mark the parent and its duplicates complete.
642 Then loop for any earlier ancestors.
643
644 Arguments:
645 addr points to the completed address item
646 now the current time as a string, for writing to the message log
647
648 Returns: nothing
649 */
650
651 static void
652 child_done(address_item *addr, uschar *now)
653 {
654 address_item *aa;
655 while (addr->parent != NULL)
656 {
657 addr = addr->parent;
658 if ((addr->child_count -= 1) > 0) return; /* Incomplete parent */
659 address_done(addr, now);
660
661 /* Log the completion of all descendents only when there is no ancestor with
662 the same original address. */
663
664 for (aa = addr->parent; aa != NULL; aa = aa->parent)
665 if (Ustrcmp(aa->address, addr->address) == 0) break;
666 if (aa != NULL) continue;
667
668 deliver_msglog("%s %s: children all complete\n", now, addr->address);
669 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
670 }
671 }
672
673
674
675
676 void
677 delivery_log(address_item * addr, int logchar)
678 {
679 uschar *log_address;
680 int size = 256; /* Used for a temporary, */
681 int ptr = 0; /* expanding buffer, for */
682 uschar *s; /* building log lines; */
683 void *reset_point; /* released afterwards. */
684
685
686 /* Log the delivery on the main log. We use an extensible string to build up
687 the log line, and reset the store afterwards. Remote deliveries should always
688 have a pointer to the host item that succeeded; local deliveries can have a
689 pointer to a single host item in their host list, for use by the transport. */
690
691 s = reset_point = store_get(size);
692 s[ptr++] = logchar;
693
694 log_address = string_log_address(addr, (log_write_selector & L_all_parents) != 0, TRUE);
695 s = string_append(s, &size, &ptr, 2, US"> ", log_address);
696
697 if ((log_extra_selector & LX_sender_on_delivery) != 0)
698 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
699
700 #ifdef EXPERIMENTAL_SRS
701 if(addr->p.srs_sender)
702 s = string_append(s, &size, &ptr, 3, US" SRS=<", addr->p.srs_sender, US">");
703 #endif
704
705 /* You might think that the return path must always be set for a successful
706 delivery; indeed, I did for some time, until this statement crashed. The case
707 when it is not set is for a delivery to /dev/null which is optimised by not
708 being run at all. */
709
710 if (used_return_path != NULL &&
711 (log_extra_selector & LX_return_path_on_delivery) != 0)
712 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
713
714 /* For a delivery from a system filter, there may not be a router */
715
716 if (addr->router != NULL)
717 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
718
719 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
720
721 if ((log_extra_selector & LX_delivery_size) != 0)
722 s = string_append(s, &size, &ptr, 2, US" S=",
723 string_sprintf("%d", transport_count));
724
725 /* Local delivery */
726
727 if (addr->transport->info->local)
728 {
729 if (addr->host_list != NULL)
730 s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name);
731 if (addr->shadow_message != NULL)
732 s = string_cat(s, &size, &ptr, addr->shadow_message,
733 Ustrlen(addr->shadow_message));
734 }
735
736 /* Remote delivery */
737
738 else
739 {
740 if (addr->host_used != NULL)
741 {
742 s = string_append(s, &size, &ptr, 5, US" H=", addr->host_used->name,
743 US" [", addr->host_used->address, US"]");
744 if ((log_extra_selector & LX_outgoing_port) != 0)
745 s = string_append(s, &size, &ptr, 2, US":", string_sprintf("%d",
746 addr->host_used->port));
747 if (continue_sequence > 1)
748 s = string_cat(s, &size, &ptr, US"*", 1);
749 }
750
751 #ifdef SUPPORT_TLS
752 if ((log_extra_selector & LX_tls_cipher) != 0 && addr->cipher != NULL)
753 s = string_append(s, &size, &ptr, 2, US" X=", addr->cipher);
754 if ((log_extra_selector & LX_tls_certificate_verified) != 0 &&
755 addr->cipher != NULL)
756 s = string_append(s, &size, &ptr, 2, US" CV=",
757 testflag(addr, af_cert_verified)? "yes":"no");
758 if ((log_extra_selector & LX_tls_peerdn) != 0 && addr->peerdn != NULL)
759 s = string_append(s, &size, &ptr, 3, US" DN=\"",
760 string_printing(addr->peerdn), US"\"");
761 #endif
762
763 if ((log_extra_selector & LX_smtp_confirmation) != 0 &&
764 addr->message != NULL)
765 {
766 int i;
767 uschar *p = big_buffer;
768 uschar *ss = addr->message;
769 *p++ = '\"';
770 for (i = 0; i < 100 && ss[i] != 0; i++)
771 {
772 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\';
773 *p++ = ss[i];
774 }
775 *p++ = '\"';
776 *p = 0;
777 s = string_append(s, &size, &ptr, 2, US" C=", big_buffer);
778 }
779 }
780
781 /* Time on queue and actual time taken to deliver */
782
783 if ((log_extra_selector & LX_queue_time) != 0)
784 {
785 s = string_append(s, &size, &ptr, 2, US" QT=",
786 readconf_printtime(time(NULL) - received_time));
787 }
788
789 if ((log_extra_selector & LX_deliver_time) != 0)
790 {
791 s = string_append(s, &size, &ptr, 2, US" DT=",
792 readconf_printtime(addr->more_errno));
793 }
794
795 /* string_cat() always leaves room for the terminator. Release the
796 store we used to build the line after writing it. */
797
798 s[ptr] = 0;
799 log_write(0, LOG_MAIN, "%s", s);
800 store_reset(reset_point);
801 return;
802 }
803
804
805
806 /*************************************************
807 * Actions at the end of handling an address *
808 *************************************************/
809
810 /* This is a function for processing a single address when all that can be done
811 with it has been done.
812
813 Arguments:
814 addr points to the address block
815 result the result of the delivery attempt
816 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
817 driver_type indicates which type of driver (transport, or router) was last
818 to process the address
819 logchar '=' or '-' for use when logging deliveries with => or ->
820
821 Returns: nothing
822 */
823
824 static void
825 post_process_one(address_item *addr, int result, int logflags, int driver_type,
826 int logchar)
827 {
828 uschar *now = tod_stamp(tod_log);
829 uschar *driver_kind = NULL;
830 uschar *driver_name = NULL;
831 uschar *log_address;
832
833 int size = 256; /* Used for a temporary, */
834 int ptr = 0; /* expanding buffer, for */
835 uschar *s; /* building log lines; */
836 void *reset_point; /* released afterwards. */
837
838
839 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
840
841 /* Set up driver kind and name for logging. Disable logging if the router or
842 transport has disabled it. */
843
844 if (driver_type == DTYPE_TRANSPORT)
845 {
846 if (addr->transport != NULL)
847 {
848 driver_name = addr->transport->name;
849 driver_kind = US" transport";
850 disable_logging = addr->transport->disable_logging;
851 }
852 else driver_kind = US"transporting";
853 }
854 else if (driver_type == DTYPE_ROUTER)
855 {
856 if (addr->router != NULL)
857 {
858 driver_name = addr->router->name;
859 driver_kind = US" router";
860 disable_logging = addr->router->disable_logging;
861 }
862 else driver_kind = US"routing";
863 }
864
865 /* If there's an error message set, ensure that it contains only printing
866 characters - it should, but occasionally things slip in and this at least
867 stops the log format from getting wrecked. We also scan the message for an LDAP
868 expansion item that has a password setting, and flatten the password. This is a
869 fudge, but I don't know a cleaner way of doing this. (If the item is badly
870 malformed, it won't ever have gone near LDAP.) */
871
872 if (addr->message != NULL)
873 {
874 addr->message = string_printing(addr->message);
875 if (((Ustrstr(addr->message, "failed to expand") != NULL) || (Ustrstr(addr->message, "expansion of ") != NULL)) &&
876 (Ustrstr(addr->message, "mysql") != NULL ||
877 Ustrstr(addr->message, "pgsql") != NULL ||
878 Ustrstr(addr->message, "sqlite") != NULL ||
879 Ustrstr(addr->message, "ldap:") != NULL ||
880 Ustrstr(addr->message, "ldapdn:") != NULL ||
881 Ustrstr(addr->message, "ldapm:") != NULL))
882 {
883 addr->message = string_sprintf("Temporary internal error");
884 }
885 }
886
887 /* If we used a transport that has one of the "return_output" options set, and
888 if it did in fact generate some output, then for return_output we treat the
889 message as failed if it was not already set that way, so that the output gets
890 returned to the sender, provided there is a sender to send it to. For
891 return_fail_output, do this only if the delivery failed. Otherwise we just
892 unlink the file, and remove the name so that if the delivery failed, we don't
893 try to send back an empty or unwanted file. The log_output options operate only
894 on a non-empty file.
895
896 In any case, we close the message file, because we cannot afford to leave a
897 file-descriptor for one address while processing (maybe very many) others. */
898
899 if (addr->return_file >= 0 && addr->return_filename != NULL)
900 {
901 BOOL return_output = FALSE;
902 struct stat statbuf;
903 (void)EXIMfsync(addr->return_file);
904
905 /* If there is no output, do nothing. */
906
907 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
908 {
909 transport_instance *tb = addr->transport;
910
911 /* Handle logging options */
912
913 if (tb->log_output || (result == FAIL && tb->log_fail_output) ||
914 (result == DEFER && tb->log_defer_output))
915 {
916 uschar *s;
917 FILE *f = Ufopen(addr->return_filename, "rb");
918 if (f == NULL)
919 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
920 "from %s transport: %s", addr->return_filename, tb->name,
921 strerror(errno));
922 else
923 {
924 s = US Ufgets(big_buffer, big_buffer_size, f);
925 if (s != NULL)
926 {
927 uschar *p = big_buffer + Ustrlen(big_buffer);
928 while (p > big_buffer && isspace(p[-1])) p--;
929 *p = 0;
930 s = string_printing(big_buffer);
931 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
932 addr->address, tb->name, s);
933 }
934 (void)fclose(f);
935 }
936 }
937
938 /* Handle returning options, but only if there is an address to return
939 the text to. */
940
941 if (sender_address[0] != 0 || addr->p.errors_address != NULL)
942 {
943 if (tb->return_output)
944 {
945 addr->transport_return = result = FAIL;
946 if (addr->basic_errno == 0 && addr->message == NULL)
947 addr->message = US"return message generated";
948 return_output = TRUE;
949 }
950 else
951 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
952 }
953 }
954
955 /* Get rid of the file unless it might be returned, but close it in
956 all cases. */
957
958 if (!return_output)
959 {
960 Uunlink(addr->return_filename);
961 addr->return_filename = NULL;
962 addr->return_file = -1;
963 }
964
965 (void)close(addr->return_file);
966 }
967
968 /* The sucess case happens only after delivery by a transport. */
969
970 if (result == OK)
971 {
972 addr->next = addr_succeed;
973 addr_succeed = addr;
974
975 /* Call address_done() to ensure that we don't deliver to this address again,
976 and write appropriate things to the message log. If it is a child address, we
977 call child_done() to scan the ancestors and mark them complete if this is the
978 last child to complete. */
979
980 address_done(addr, now);
981 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
982
983 if (addr->parent == NULL)
984 {
985 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
986 driver_name, driver_kind);
987 }
988 else
989 {
990 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
991 addr->parent->address, driver_name, driver_kind);
992 child_done(addr, now);
993 }
994
995 delivery_log(addr, logchar);
996 }
997
998
999 /* Soft failure, or local delivery process failed; freezing may be
1000 requested. */
1001
1002 else if (result == DEFER || result == PANIC)
1003 {
1004 if (result == PANIC) logflags |= LOG_PANIC;
1005
1006 /* This puts them on the chain in reverse order. Do not change this, because
1007 the code for handling retries assumes that the one with the retry
1008 information is last. */
1009
1010 addr->next = addr_defer;
1011 addr_defer = addr;
1012
1013 /* The only currently implemented special action is to freeze the
1014 message. Logging of this is done later, just before the -H file is
1015 updated. */
1016
1017 if (addr->special_action == SPECIAL_FREEZE)
1018 {
1019 deliver_freeze = TRUE;
1020 deliver_frozen_at = time(NULL);
1021 update_spool = TRUE;
1022 }
1023
1024 /* If doing a 2-stage queue run, we skip writing to either the message
1025 log or the main log for SMTP defers. */
1026
1027 if (!queue_2stage || addr->basic_errno != 0)
1028 {
1029 uschar ss[32];
1030
1031 /* For errors of the type "retry time not reached" (also remotes skipped
1032 on queue run), logging is controlled by L_retry_defer. Note that this kind
1033 of error number is negative, and all the retry ones are less than any
1034 others. */
1035
1036 unsigned int use_log_selector = (addr->basic_errno <= ERRNO_RETRY_BASE)?
1037 L_retry_defer : 0;
1038
1039 /* Build up the line that is used for both the message log and the main
1040 log. */
1041
1042 s = reset_point = store_get(size);
1043
1044 /* Create the address string for logging. Must not do this earlier, because
1045 an OK result may be changed to FAIL when a pipe returns text. */
1046
1047 log_address = string_log_address(addr,
1048 (log_write_selector & L_all_parents) != 0, result == OK);
1049
1050 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1051
1052 /* Either driver_name contains something and driver_kind contains
1053 " router" or " transport" (note the leading space), or driver_name is
1054 a null string and driver_kind contains "routing" without the leading
1055 space, if all routing has been deferred. When a domain has been held,
1056 so nothing has been done at all, both variables contain null strings. */
1057
1058 if (driver_name == NULL)
1059 {
1060 if (driver_kind != NULL)
1061 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1062 }
1063 else
1064 {
1065 if (driver_kind[1] == 't' && addr->router != NULL)
1066 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1067 Ustrcpy(ss, " ?=");
1068 ss[1] = toupper(driver_kind[1]);
1069 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1070 }
1071
1072 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1073 s = string_cat(s, &size, &ptr, ss, Ustrlen(ss));
1074
1075 if (addr->basic_errno > 0)
1076 s = string_append(s, &size, &ptr, 2, US": ",
1077 US strerror(addr->basic_errno));
1078
1079 if (addr->message != NULL)
1080 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1081
1082 s[ptr] = 0;
1083
1084 /* Log the deferment in the message log, but don't clutter it
1085 up with retry-time defers after the first delivery attempt. */
1086
1087 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1088 deliver_msglog("%s %s\n", now, s);
1089
1090 /* Write the main log and reset the store */
1091
1092 log_write(use_log_selector, logflags, "== %s", s);
1093 store_reset(reset_point);
1094 }
1095 }
1096
1097
1098 /* Hard failure. If there is an address to which an error message can be sent,
1099 put this address on the failed list. If not, put it on the deferred list and
1100 freeze the mail message for human attention. The latter action can also be
1101 explicitly requested by a router or transport. */
1102
1103 else
1104 {
1105 /* If this is a delivery error, or a message for which no replies are
1106 wanted, and the message's age is greater than ignore_bounce_errors_after,
1107 force the af_ignore_error flag. This will cause the address to be discarded
1108 later (with a log entry). */
1109
1110 if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
1111 setflag(addr, af_ignore_error);
1112
1113 /* Freeze the message if requested, or if this is a bounce message (or other
1114 message with null sender) and this address does not have its own errors
1115 address. However, don't freeze if errors are being ignored. The actual code
1116 to ignore occurs later, instead of sending a message. Logging of freezing
1117 occurs later, just before writing the -H file. */
1118
1119 if (!testflag(addr, af_ignore_error) &&
1120 (addr->special_action == SPECIAL_FREEZE ||
1121 (sender_address[0] == 0 && addr->p.errors_address == NULL)
1122 ))
1123 {
1124 frozen_info = (addr->special_action == SPECIAL_FREEZE)? US"" :
1125 (sender_local && !local_error_message)?
1126 US" (message created with -f <>)" : US" (delivery error message)";
1127 deliver_freeze = TRUE;
1128 deliver_frozen_at = time(NULL);
1129 update_spool = TRUE;
1130
1131 /* The address is put on the defer rather than the failed queue, because
1132 the message is being retained. */
1133
1134 addr->next = addr_defer;
1135 addr_defer = addr;
1136 }
1137
1138 /* Don't put the address on the nonrecipients tree yet; wait until an
1139 error message has been successfully sent. */
1140
1141 else
1142 {
1143 addr->next = addr_failed;
1144 addr_failed = addr;
1145 }
1146
1147 /* Build up the log line for the message and main logs */
1148
1149 s = reset_point = store_get(size);
1150
1151 /* Create the address string for logging. Must not do this earlier, because
1152 an OK result may be changed to FAIL when a pipe returns text. */
1153
1154 log_address = string_log_address(addr,
1155 (log_write_selector & L_all_parents) != 0, result == OK);
1156
1157 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1158
1159 if ((log_extra_selector & LX_sender_on_delivery) != 0)
1160 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1161
1162 /* Return path may not be set if no delivery actually happened */
1163
1164 if (used_return_path != NULL &&
1165 (log_extra_selector & LX_return_path_on_delivery) != 0)
1166 {
1167 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1168 }
1169
1170 if (addr->router != NULL)
1171 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1172 if (addr->transport != NULL)
1173 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1174
1175 if (addr->host_used != NULL)
1176 s = string_append(s, &size, &ptr, 5, US" H=", addr->host_used->name,
1177 US" [", addr->host_used->address, US"]");
1178
1179 if (addr->basic_errno > 0)
1180 s = string_append(s, &size, &ptr, 2, US": ",
1181 US strerror(addr->basic_errno));
1182
1183 if (addr->message != NULL)
1184 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1185
1186 s[ptr] = 0;
1187
1188 /* Do the logging. For the message log, "routing failed" for those cases,
1189 just to make it clearer. */
1190
1191 if (driver_name == NULL)
1192 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1193 else
1194 deliver_msglog("%s %s\n", now, s);
1195
1196 log_write(0, LOG_MAIN, "** %s", s);
1197 store_reset(reset_point);
1198 }
1199
1200 /* Ensure logging is turned on again in all cases */
1201
1202 disable_logging = FALSE;
1203 }
1204
1205
1206
1207
1208 /*************************************************
1209 * Address-independent error *
1210 *************************************************/
1211
1212 /* This function is called when there's an error that is not dependent on a
1213 particular address, such as an expansion string failure. It puts the error into
1214 all the addresses in a batch, logs the incident on the main and panic logs, and
1215 clears the expansions. It is mostly called from local_deliver(), but can be
1216 called for a remote delivery via findugid().
1217
1218 Arguments:
1219 logit TRUE if (MAIN+PANIC) logging required
1220 addr the first of the chain of addresses
1221 code the error code
1222 format format string for error message, or NULL if already set in addr
1223 ... arguments for the format
1224
1225 Returns: nothing
1226 */
1227
1228 static void
1229 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1230 {
1231 address_item *addr2;
1232 addr->basic_errno = code;
1233
1234 if (format != NULL)
1235 {
1236 va_list ap;
1237 uschar buffer[512];
1238 va_start(ap, format);
1239 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1240 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1241 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1242 va_end(ap);
1243 addr->message = string_copy(buffer);
1244 }
1245
1246 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
1247 {
1248 addr2->basic_errno = code;
1249 addr2->message = addr->message;
1250 }
1251
1252 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1253 deliver_set_expansions(NULL);
1254 }
1255
1256
1257
1258
1259 /*************************************************
1260 * Check a "never users" list *
1261 *************************************************/
1262
1263 /* This function is called to check whether a uid is on one of the two "never
1264 users" lists.
1265
1266 Arguments:
1267 uid the uid to be checked
1268 nusers the list to be scanned; the first item in the list is the count
1269
1270 Returns: TRUE if the uid is on the list
1271 */
1272
1273 static BOOL
1274 check_never_users(uid_t uid, uid_t *nusers)
1275 {
1276 int i;
1277 if (nusers == NULL) return FALSE;
1278 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1279 return FALSE;
1280 }
1281
1282
1283
1284 /*************************************************
1285 * Find uid and gid for a transport *
1286 *************************************************/
1287
1288 /* This function is called for both local and remote deliveries, to find the
1289 uid/gid under which to run the delivery. The values are taken preferentially
1290 from the transport (either explicit or deliver_as_creator), then from the
1291 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1292 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1293 panic error is logged, and the function fails (which normally leads to delivery
1294 deferral).
1295
1296 Arguments:
1297 addr the address (possibly a chain)
1298 tp the transport
1299 uidp pointer to uid field
1300 gidp pointer to gid field
1301 igfp pointer to the use_initgroups field
1302
1303 Returns: FALSE if failed - error has been set in address(es)
1304 */
1305
1306 static BOOL
1307 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1308 BOOL *igfp)
1309 {
1310 uschar *nuname = NULL;
1311 BOOL gid_set = FALSE;
1312
1313 /* Default initgroups flag comes from the transport */
1314
1315 *igfp = tp->initgroups;
1316
1317 /* First see if there's a gid on the transport, either fixed or expandable.
1318 The expanding function always logs failure itself. */
1319
1320 if (tp->gid_set)
1321 {
1322 *gidp = tp->gid;
1323 gid_set = TRUE;
1324 }
1325 else if (tp->expand_gid != NULL)
1326 {
1327 if (route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1328 &(addr->message))) gid_set = TRUE;
1329 else
1330 {
1331 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1332 return FALSE;
1333 }
1334 }
1335
1336 /* If the transport did not set a group, see if the router did. */
1337
1338 if (!gid_set && testflag(addr, af_gid_set))
1339 {
1340 *gidp = addr->gid;
1341 gid_set = TRUE;
1342 }
1343
1344 /* Pick up a uid from the transport if one is set. */
1345
1346 if (tp->uid_set) *uidp = tp->uid;
1347
1348 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1349 it does not provide a passwd value from which a gid can be taken. */
1350
1351 else if (tp->expand_uid != NULL)
1352 {
1353 struct passwd *pw;
1354 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1355 uidp, &(addr->message)))
1356 {
1357 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1358 return FALSE;
1359 }
1360 if (!gid_set && pw != NULL)
1361 {
1362 *gidp = pw->pw_gid;
1363 gid_set = TRUE;
1364 }
1365 }
1366
1367 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1368
1369 else if (tp->deliver_as_creator)
1370 {
1371 *uidp = originator_uid;
1372 if (!gid_set)
1373 {
1374 *gidp = originator_gid;
1375 gid_set = TRUE;
1376 }
1377 }
1378
1379 /* Otherwise see if the address specifies the uid and if so, take it and its
1380 initgroups flag. */
1381
1382 else if (testflag(addr, af_uid_set))
1383 {
1384 *uidp = addr->uid;
1385 *igfp = testflag(addr, af_initgroups);
1386 }
1387
1388 /* Nothing has specified the uid - default to the Exim user, and group if the
1389 gid is not set. */
1390
1391 else
1392 {
1393 *uidp = exim_uid;
1394 if (!gid_set)
1395 {
1396 *gidp = exim_gid;
1397 gid_set = TRUE;
1398 }
1399 }
1400
1401 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1402 defaulting to the Exim uid. In other words, if the configuration has specified
1403 a uid, it must also provide a gid. */
1404
1405 if (!gid_set)
1406 {
1407 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1408 "%s transport", tp->name);
1409 return FALSE;
1410 }
1411
1412 /* Check that the uid is not on the lists of banned uids that may not be used
1413 for delivery processes. */
1414
1415 if (check_never_users(*uidp, never_users))
1416 nuname = US"never_users";
1417 else if (check_never_users(*uidp, fixed_never_users))
1418 nuname = US"fixed_never_users";
1419
1420 if (nuname != NULL)
1421 {
1422 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1423 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1424 return FALSE;
1425 }
1426
1427 /* All is well */
1428
1429 return TRUE;
1430 }
1431
1432
1433
1434
1435 /*************************************************
1436 * Check the size of a message for a transport *
1437 *************************************************/
1438
1439 /* Checks that the message isn't too big for the selected transport.
1440 This is called only when it is known that the limit is set.
1441
1442 Arguments:
1443 tp the transport
1444 addr the (first) address being delivered
1445
1446 Returns: OK
1447 DEFER expansion failed or did not yield an integer
1448 FAIL message too big
1449 */
1450
1451 int
1452 check_message_size(transport_instance *tp, address_item *addr)
1453 {
1454 int rc = OK;
1455 int size_limit;
1456
1457 deliver_set_expansions(addr);
1458 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1459 deliver_set_expansions(NULL);
1460
1461 if (expand_string_message != NULL)
1462 {
1463 rc = DEFER;
1464 if (size_limit == -1)
1465 addr->message = string_sprintf("failed to expand message_size_limit "
1466 "in %s transport: %s", tp->name, expand_string_message);
1467 else
1468 addr->message = string_sprintf("invalid message_size_limit "
1469 "in %s transport: %s", tp->name, expand_string_message);
1470 }
1471 else if (size_limit > 0 && message_size > size_limit)
1472 {
1473 rc = FAIL;
1474 addr->message =
1475 string_sprintf("message is too big (transport limit = %d)",
1476 size_limit);
1477 }
1478
1479 return rc;
1480 }
1481
1482
1483
1484 /*************************************************
1485 * Transport-time check for a previous delivery *
1486 *************************************************/
1487
1488 /* Check that this base address hasn't previously been delivered to its routed
1489 transport. If it has been delivered, mark it done. The check is necessary at
1490 delivery time in order to handle homonymic addresses correctly in cases where
1491 the pattern of redirection changes between delivery attempts (so the unique
1492 fields change). Non-homonymic previous delivery is detected earlier, at routing
1493 time (which saves unnecessary routing).
1494
1495 Arguments:
1496 addr the address item
1497 testing TRUE if testing wanted only, without side effects
1498
1499 Returns: TRUE if previously delivered by the transport
1500 */
1501
1502 static BOOL
1503 previously_transported(address_item *addr, BOOL testing)
1504 {
1505 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
1506 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
1507
1508 if (tree_search(tree_nonrecipients, big_buffer) != 0)
1509 {
1510 DEBUG(D_deliver|D_route|D_transport)
1511 debug_printf("%s was previously delivered (%s transport): discarded\n",
1512 addr->address, addr->transport->name);
1513 if (!testing) child_done(addr, tod_stamp(tod_log));
1514 return TRUE;
1515 }
1516
1517 return FALSE;
1518 }
1519
1520
1521
1522 /******************************************************
1523 * Check for a given header in a header string *
1524 ******************************************************/
1525
1526 /* This function is used when generating quota warnings. The configuration may
1527 specify any header lines it likes in quota_warn_message. If certain of them are
1528 missing, defaults are inserted, so we need to be able to test for the presence
1529 of a given header.
1530
1531 Arguments:
1532 hdr the required header name
1533 hstring the header string
1534
1535 Returns: TRUE the header is in the string
1536 FALSE the header is not in the string
1537 */
1538
1539 static BOOL
1540 contains_header(uschar *hdr, uschar *hstring)
1541 {
1542 int len = Ustrlen(hdr);
1543 uschar *p = hstring;
1544 while (*p != 0)
1545 {
1546 if (strncmpic(p, hdr, len) == 0)
1547 {
1548 p += len;
1549 while (*p == ' ' || *p == '\t') p++;
1550 if (*p == ':') return TRUE;
1551 }
1552 while (*p != 0 && *p != '\n') p++;
1553 if (*p == '\n') p++;
1554 }
1555 return FALSE;
1556 }
1557
1558
1559
1560
1561 /*************************************************
1562 * Perform a local delivery *
1563 *************************************************/
1564
1565 /* Each local delivery is performed in a separate process which sets its
1566 uid and gid as specified. This is a safer way than simply changing and
1567 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
1568 used safely. From release 4, Exim no longer makes any use of it. Besides, not
1569 all systems have seteuid().
1570
1571 If the uid/gid are specified in the transport_instance, they are used; the
1572 transport initialization must ensure that either both or neither are set.
1573 Otherwise, the values associated with the address are used. If neither are set,
1574 it is a configuration error.
1575
1576 The transport or the address may specify a home directory (transport over-
1577 rides), and if they do, this is set as $home. If neither have set a working
1578 directory, this value is used for that as well. Otherwise $home is left unset
1579 and the cwd is set to "/" - a directory that should be accessible to all users.
1580
1581 Using a separate process makes it more complicated to get error information
1582 back. We use a pipe to pass the return code and also an error code and error
1583 text string back to the parent process.
1584
1585 Arguments:
1586 addr points to an address block for this delivery; for "normal" local
1587 deliveries this is the only address to be delivered, but for
1588 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
1589 a number of addresses can be handled simultaneously, and in this
1590 case addr will point to a chain of addresses with the same
1591 characteristics.
1592
1593 shadowing TRUE if running a shadow transport; this causes output from pipes
1594 to be ignored.
1595
1596 Returns: nothing
1597 */
1598
1599 static void
1600 deliver_local(address_item *addr, BOOL shadowing)
1601 {
1602 BOOL use_initgroups;
1603 uid_t uid;
1604 gid_t gid;
1605 int status, len, rc;
1606 int pfd[2];
1607 pid_t pid;
1608 uschar *working_directory;
1609 address_item *addr2;
1610 transport_instance *tp = addr->transport;
1611
1612 /* Set up the return path from the errors or sender address. If the transport
1613 has its own return path setting, expand it and replace the existing value. */
1614
1615 if(addr->p.errors_address != NULL)
1616 return_path = addr->p.errors_address;
1617 #ifdef EXPERIMENTAL_SRS
1618 else if(addr->p.srs_sender != NULL)
1619 return_path = addr->p.srs_sender;
1620 #endif
1621 else
1622 return_path = sender_address;
1623
1624 if (tp->return_path != NULL)
1625 {
1626 uschar *new_return_path = expand_string(tp->return_path);
1627 if (new_return_path == NULL)
1628 {
1629 if (!expand_string_forcedfail)
1630 {
1631 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
1632 US"Failed to expand return path \"%s\" in %s transport: %s",
1633 tp->return_path, tp->name, expand_string_message);
1634 return;
1635 }
1636 }
1637 else return_path = new_return_path;
1638 }
1639
1640 /* For local deliveries, one at a time, the value used for logging can just be
1641 set directly, once and for all. */
1642
1643 used_return_path = return_path;
1644
1645 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
1646 gets put into the address(es), and the expansions are unset, so we can just
1647 return. */
1648
1649 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
1650
1651 /* See if either the transport or the address specifies a home directory. A
1652 home directory set in the address may already be expanded; a flag is set to
1653 indicate that. In other cases we must expand it. */
1654
1655 if ((deliver_home = tp->home_dir) != NULL || /* Set in transport, or */
1656 ((deliver_home = addr->home_dir) != NULL && /* Set in address and */
1657 !testflag(addr, af_home_expanded))) /* not expanded */
1658 {
1659 uschar *rawhome = deliver_home;
1660 deliver_home = NULL; /* in case it contains $home */
1661 deliver_home = expand_string(rawhome);
1662 if (deliver_home == NULL)
1663 {
1664 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
1665 "to expand for %s transport: %s", rawhome, tp->name,
1666 expand_string_message);
1667 return;
1668 }
1669 if (*deliver_home != '/')
1670 {
1671 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
1672 "is not absolute for %s transport", deliver_home, tp->name);
1673 return;
1674 }
1675 }
1676
1677 /* See if either the transport or the address specifies a current directory,
1678 and if so, expand it. If nothing is set, use the home directory, unless it is
1679 also unset in which case use "/", which is assumed to be a directory to which
1680 all users have access. It is necessary to be in a visible directory for some
1681 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
1682 2.5) require this. */
1683
1684 working_directory = (tp->current_dir != NULL)?
1685 tp->current_dir : addr->current_dir;
1686
1687 if (working_directory != NULL)
1688 {
1689 uschar *raw = working_directory;
1690 working_directory = expand_string(raw);
1691 if (working_directory == NULL)
1692 {
1693 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
1694 "failed to expand for %s transport: %s", raw, tp->name,
1695 expand_string_message);
1696 return;
1697 }
1698 if (*working_directory != '/')
1699 {
1700 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
1701 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
1702 return;
1703 }
1704 }
1705 else working_directory = (deliver_home == NULL)? US"/" : deliver_home;
1706
1707 /* If one of the return_output flags is set on the transport, create and open a
1708 file in the message log directory for the transport to write its output onto.
1709 This is mainly used by pipe transports. The file needs to be unique to the
1710 address. This feature is not available for shadow transports. */
1711
1712 if (!shadowing && (tp->return_output || tp->return_fail_output ||
1713 tp->log_output || tp->log_fail_output))
1714 {
1715 uschar *error;
1716 addr->return_filename =
1717 string_sprintf("%s/msglog/%s/%s-%d-%d", spool_directory, message_subdir,
1718 message_id, getpid(), return_count++);
1719 addr->return_file = open_msglog_file(addr->return_filename, 0400, &error);
1720 if (addr->return_file < 0)
1721 {
1722 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
1723 "to return message: %s", error, tp->name, strerror(errno));
1724 return;
1725 }
1726 }
1727
1728 /* Create the pipe for inter-process communication. */
1729
1730 if (pipe(pfd) != 0)
1731 {
1732 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
1733 strerror(errno));
1734 return;
1735 }
1736
1737 /* Now fork the process to do the real work in the subprocess, but first
1738 ensure that all cached resources are freed so that the subprocess starts with
1739 a clean slate and doesn't interfere with the parent process. */
1740
1741 search_tidyup();
1742
1743 if ((pid = fork()) == 0)
1744 {
1745 BOOL replicate = TRUE;
1746
1747 /* Prevent core dumps, as we don't want them in users' home directories.
1748 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
1749 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
1750 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
1751 complain if the error is "not supported".
1752
1753 There are two scenarios where changing the max limit has an effect. In one,
1754 the user is using a .forward and invoking a command of their choice via pipe;
1755 for these, we do need the max limit to be 0 unless the admin chooses to
1756 permit an increased limit. In the other, the command is invoked directly by
1757 the transport and is under administrator control, thus being able to raise
1758 the limit aids in debugging. So there's no general always-right answer.
1759
1760 Thus we inhibit core-dumps completely but let individual transports, while
1761 still root, re-raise the limits back up to aid debugging. We make the
1762 default be no core-dumps -- few enough people can use core dumps in
1763 diagnosis that it's reasonable to make them something that has to be explicitly requested.
1764 */
1765
1766 #ifdef RLIMIT_CORE
1767 struct rlimit rl;
1768 rl.rlim_cur = 0;
1769 rl.rlim_max = 0;
1770 if (setrlimit(RLIMIT_CORE, &rl) < 0)
1771 {
1772 #ifdef SETRLIMIT_NOT_SUPPORTED
1773 if (errno != ENOSYS && errno != ENOTSUP)
1774 #endif
1775 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
1776 strerror(errno));
1777 }
1778 #endif
1779
1780 /* Reset the random number generator, so different processes don't all
1781 have the same sequence. */
1782
1783 random_seed = 0;
1784
1785 /* If the transport has a setup entry, call this first, while still
1786 privileged. (Appendfile uses this to expand quota, for example, while
1787 able to read private files.) */
1788
1789 if (addr->transport->setup != NULL)
1790 {
1791 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
1792 &(addr->message)))
1793 {
1794 case DEFER:
1795 addr->transport_return = DEFER;
1796 goto PASS_BACK;
1797
1798 case FAIL:
1799 addr->transport_return = PANIC;
1800 goto PASS_BACK;
1801 }
1802 }
1803
1804 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
1805 when the process becomes unprivileged, it won't be able to write to the
1806 process log. SIGHUP is ignored throughout exim, except when it is being
1807 run as a daemon. */
1808
1809 signal(SIGINT, SIG_IGN);
1810 signal(SIGTERM, SIG_IGN);
1811 signal(SIGUSR1, SIG_IGN);
1812
1813 /* Close the unwanted half of the pipe, and set close-on-exec for the other
1814 half - for transports that exec things (e.g. pipe). Then set the required
1815 gid/uid. */
1816
1817 (void)close(pfd[pipe_read]);
1818 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
1819 FD_CLOEXEC);
1820 exim_setugid(uid, gid, use_initgroups,
1821 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
1822 addr->address, addr->transport->name));
1823
1824 DEBUG(D_deliver)
1825 {
1826 address_item *batched;
1827 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
1828 for (batched = addr->next; batched != NULL; batched = batched->next)
1829 debug_printf("additional batched address: %s\n", batched->address);
1830 }
1831
1832 /* Set an appropriate working directory. */
1833
1834 if (Uchdir(working_directory) < 0)
1835 {
1836 addr->transport_return = DEFER;
1837 addr->basic_errno = errno;
1838 addr->message = string_sprintf("failed to chdir to %s", working_directory);
1839 }
1840
1841 /* If successful, call the transport */
1842
1843 else
1844 {
1845 BOOL ok = TRUE;
1846 set_process_info("delivering %s to %s using %s", message_id,
1847 addr->local_part, addr->transport->name);
1848
1849 /* If a transport filter has been specified, set up its argument list.
1850 Any errors will get put into the address, and FALSE yielded. */
1851
1852 if (addr->transport->filter_command != NULL)
1853 {
1854 ok = transport_set_up_command(&transport_filter_argv,
1855 addr->transport->filter_command,
1856 TRUE, PANIC, addr, US"transport filter", NULL);
1857 transport_filter_timeout = addr->transport->filter_timeout;
1858 }
1859 else transport_filter_argv = NULL;
1860
1861 if (ok)
1862 {
1863 debug_print_string(addr->transport->debug_string);
1864 replicate = !(addr->transport->info->code)(addr->transport, addr);
1865 }
1866 }
1867
1868 /* Pass the results back down the pipe. If necessary, first replicate the
1869 status in the top address to the others in the batch. The label is the
1870 subject of a goto when a call to the transport's setup function fails. We
1871 pass the pointer to the transport back in case it got changed as a result of
1872 file_format in appendfile. */
1873
1874 PASS_BACK:
1875
1876 if (replicate) replicate_status(addr);
1877 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
1878 {
1879 int i;
1880 int local_part_length = Ustrlen(addr2->local_part);
1881 uschar *s;
1882
1883 (void)write(pfd[pipe_write], (void *)&(addr2->transport_return), sizeof(int));
1884 (void)write(pfd[pipe_write], (void *)&transport_count, sizeof(transport_count));
1885 (void)write(pfd[pipe_write], (void *)&(addr2->flags), sizeof(addr2->flags));
1886 (void)write(pfd[pipe_write], (void *)&(addr2->basic_errno), sizeof(int));
1887 (void)write(pfd[pipe_write], (void *)&(addr2->more_errno), sizeof(int));
1888 (void)write(pfd[pipe_write], (void *)&(addr2->special_action), sizeof(int));
1889 (void)write(pfd[pipe_write], (void *)&(addr2->transport),
1890 sizeof(transport_instance *));
1891
1892 /* For a file delivery, pass back the local part, in case the original
1893 was only part of the final delivery path. This gives more complete
1894 logging. */
1895
1896 if (testflag(addr2, af_file))
1897 {
1898 (void)write(pfd[pipe_write], (void *)&local_part_length, sizeof(int));
1899 (void)write(pfd[pipe_write], addr2->local_part, local_part_length);
1900 }
1901
1902 /* Now any messages */
1903
1904 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
1905 {
1906 int message_length = (s == NULL)? 0 : Ustrlen(s) + 1;
1907 (void)write(pfd[pipe_write], (void *)&message_length, sizeof(int));
1908 if (message_length > 0) (void)write(pfd[pipe_write], s, message_length);
1909 }
1910 }
1911
1912 /* OK, this process is now done. Free any cached resources that it opened,
1913 and close the pipe we were writing down before exiting. */
1914
1915 (void)close(pfd[pipe_write]);
1916 search_tidyup();
1917 exit(EXIT_SUCCESS);
1918 }
1919
1920 /* Back in the main process: panic if the fork did not succeed. This seems
1921 better than returning an error - if forking is failing it is probably best
1922 not to try other deliveries for this message. */
1923
1924 if (pid < 0)
1925 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
1926 addr->address);
1927
1928 /* Read the pipe to get the delivery status codes and error messages. Our copy
1929 of the writing end must be closed first, as otherwise read() won't return zero
1930 on an empty pipe. We check that a status exists for each address before
1931 overwriting the address structure. If data is missing, the default DEFER status
1932 will remain. Afterwards, close the reading end. */
1933
1934 (void)close(pfd[pipe_write]);
1935
1936 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
1937 {
1938 len = read(pfd[pipe_read], (void *)&status, sizeof(int));
1939 if (len > 0)
1940 {
1941 int i;
1942 uschar **sptr;
1943
1944 addr2->transport_return = status;
1945 len = read(pfd[pipe_read], (void *)&transport_count,
1946 sizeof(transport_count));
1947 len = read(pfd[pipe_read], (void *)&(addr2->flags), sizeof(addr2->flags));
1948 len = read(pfd[pipe_read], (void *)&(addr2->basic_errno), sizeof(int));
1949 len = read(pfd[pipe_read], (void *)&(addr2->more_errno), sizeof(int));
1950 len = read(pfd[pipe_read], (void *)&(addr2->special_action), sizeof(int));
1951 len = read(pfd[pipe_read], (void *)&(addr2->transport),
1952 sizeof(transport_instance *));
1953
1954 if (testflag(addr2, af_file))
1955 {
1956 int local_part_length;
1957 len = read(pfd[pipe_read], (void *)&local_part_length, sizeof(int));
1958 len = read(pfd[pipe_read], (void *)big_buffer, local_part_length);
1959 big_buffer[local_part_length] = 0;
1960 addr2->local_part = string_copy(big_buffer);
1961 }
1962
1963 for (i = 0, sptr = &(addr2->message); i < 2;
1964 i++, sptr = &(addr2->user_message))
1965 {
1966 int message_length;
1967 len = read(pfd[pipe_read], (void *)&message_length, sizeof(int));
1968 if (message_length > 0)
1969 {
1970 len = read(pfd[pipe_read], (void *)big_buffer, message_length);
1971 if (len > 0) *sptr = string_copy(big_buffer);
1972 }
1973 }
1974 }
1975
1976 else
1977 {
1978 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
1979 "from delivery subprocess", addr2->unique);
1980 break;
1981 }
1982 }
1983
1984 (void)close(pfd[pipe_read]);
1985
1986 /* Unless shadowing, write all successful addresses immediately to the journal
1987 file, to ensure they are recorded asap. For homonymic addresses, use the base
1988 address plus the transport name. Failure to write the journal is panic-worthy,
1989 but don't stop, as it may prove possible subsequently to update the spool file
1990 in order to record the delivery. */
1991
1992 if (!shadowing)
1993 {
1994 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
1995 {
1996 if (addr2->transport_return != OK) continue;
1997
1998 if (testflag(addr2, af_homonym))
1999 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2000 else
2001 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2002
2003 /* In the test harness, wait just a bit to let the subprocess finish off
2004 any debug output etc first. */
2005
2006 if (running_in_test_harness) millisleep(300);
2007
2008 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2009 len = Ustrlen(big_buffer);
2010 if (write(journal_fd, big_buffer, len) != len)
2011 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2012 big_buffer, strerror(errno));
2013 }
2014
2015 /* Ensure the journal file is pushed out to disk. */
2016
2017 if (EXIMfsync(journal_fd) < 0)
2018 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2019 strerror(errno));
2020 }
2021
2022 /* Wait for the process to finish. If it terminates with a non-zero code,
2023 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2024 status values of all the addresses as they are. Take care to handle the case
2025 when the subprocess doesn't seem to exist. This has been seen on one system
2026 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2027 happens, wait() doesn't recognize the termination of child processes. Exim now
2028 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2029
2030 while ((rc = wait(&status)) != pid)
2031 {
2032 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2033 {
2034 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2035 addr->transport->driver_name);
2036 status = 0;
2037 break;
2038 }
2039 }
2040
2041 if ((status & 0xffff) != 0)
2042 {
2043 int msb = (status >> 8) & 255;
2044 int lsb = status & 255;
2045 int code = (msb == 0)? (lsb & 0x7f) : msb;
2046 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2047 addr->special_action = SPECIAL_FREEZE;
2048 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2049 "status 0x%04x: %s %d",
2050 addr->transport->driver_name,
2051 status,
2052 (msb == 0)? "terminated by signal" : "exit code",
2053 code);
2054 }
2055
2056 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2057
2058 if (addr->special_action == SPECIAL_WARN &&
2059 addr->transport->warn_message != NULL)
2060 {
2061 int fd;
2062 uschar *warn_message;
2063
2064 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2065
2066 warn_message = expand_string(addr->transport->warn_message);
2067 if (warn_message == NULL)
2068 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2069 "message for %s transport): %s", addr->transport->warn_message,
2070 addr->transport->name, expand_string_message);
2071 else
2072 {
2073 pid_t pid = child_open_exim(&fd);
2074 if (pid > 0)
2075 {
2076 FILE *f = fdopen(fd, "wb");
2077 if (errors_reply_to != NULL &&
2078 !contains_header(US"Reply-To", warn_message))
2079 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2080 fprintf(f, "Auto-Submitted: auto-replied\n");
2081 if (!contains_header(US"From", warn_message)) moan_write_from(f);
2082 fprintf(f, "%s", CS warn_message);
2083
2084 /* Close and wait for child process to complete, without a timeout. */
2085
2086 (void)fclose(f);
2087 (void)child_close(pid, 0);
2088 }
2089 }
2090
2091 addr->special_action = SPECIAL_NONE;
2092 }
2093 }
2094
2095
2096
2097 /*************************************************
2098 * Do local deliveries *
2099 *************************************************/
2100
2101 /* This function processes the list of addresses in addr_local. True local
2102 deliveries are always done one address at a time. However, local deliveries can
2103 be batched up in some cases. Typically this is when writing batched SMTP output
2104 files for use by some external transport mechanism, or when running local
2105 deliveries over LMTP.
2106
2107 Arguments: None
2108 Returns: Nothing
2109 */
2110
2111 static void
2112 do_local_deliveries(void)
2113 {
2114 open_db dbblock;
2115 open_db *dbm_file = NULL;
2116 time_t now = time(NULL);
2117
2118 /* Loop until we have exhausted the supply of local deliveries */
2119
2120 while (addr_local != NULL)
2121 {
2122 time_t delivery_start;
2123 int deliver_time;
2124 address_item *addr2, *addr3, *nextaddr;
2125 int logflags = LOG_MAIN;
2126 int logchar = dont_deliver? '*' : '=';
2127 transport_instance *tp;
2128
2129 /* Pick the first undelivered address off the chain */
2130
2131 address_item *addr = addr_local;
2132 addr_local = addr->next;
2133 addr->next = NULL;
2134
2135 DEBUG(D_deliver|D_transport)
2136 debug_printf("--------> %s <--------\n", addr->address);
2137
2138 /* An internal disaster if there is no transport. Should not occur! */
2139
2140 if ((tp = addr->transport) == NULL)
2141 {
2142 logflags |= LOG_PANIC;
2143 disable_logging = FALSE; /* Jic */
2144 addr->message =
2145 (addr->router != NULL)?
2146 string_sprintf("No transport set by %s router", addr->router->name)
2147 :
2148 string_sprintf("No transport set by system filter");
2149 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2150 continue;
2151 }
2152
2153 /* Check that this base address hasn't previously been delivered to this
2154 transport. The check is necessary at this point to handle homonymic addresses
2155 correctly in cases where the pattern of redirection changes between delivery
2156 attempts. Non-homonymic previous delivery is detected earlier, at routing
2157 time. */
2158
2159 if (previously_transported(addr, FALSE)) continue;
2160
2161 /* There are weird cases where logging is disabled */
2162
2163 disable_logging = tp->disable_logging;
2164
2165 /* Check for batched addresses and possible amalgamation. Skip all the work
2166 if either batch_max <= 1 or there aren't any other addresses for local
2167 delivery. */
2168
2169 if (tp->batch_max > 1 && addr_local != NULL)
2170 {
2171 int batch_count = 1;
2172 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2173 BOOL uses_lp = (testflag(addr, af_pfr) &&
2174 (testflag(addr, af_file) || addr->local_part[0] == '|')) ||
2175 readconf_depends((driver_instance *)tp, US"local_part");
2176 uschar *batch_id = NULL;
2177 address_item **anchor = &addr_local;
2178 address_item *last = addr;
2179 address_item *next;
2180
2181 /* Expand the batch_id string for comparison with other addresses.
2182 Expansion failure suppresses batching. */
2183
2184 if (tp->batch_id != NULL)
2185 {
2186 deliver_set_expansions(addr);
2187 batch_id = expand_string(tp->batch_id);
2188 deliver_set_expansions(NULL);
2189 if (batch_id == NULL)
2190 {
2191 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2192 "in %s transport (%s): %s", tp->name, addr->address,
2193 expand_string_message);
2194 batch_count = tp->batch_max;
2195 }
2196 }
2197
2198 /* Until we reach the batch_max limit, pick off addresses which have the
2199 same characteristics. These are:
2200
2201 same transport
2202 not previously delivered (see comment about 50 lines above)
2203 same local part if the transport's configuration contains $local_part
2204 or if this is a file or pipe delivery from a redirection
2205 same domain if the transport's configuration contains $domain
2206 same errors address
2207 same additional headers
2208 same headers to be removed
2209 same uid/gid for running the transport
2210 same first host if a host list is set
2211 */
2212
2213 while ((next = *anchor) != NULL && batch_count < tp->batch_max)
2214 {
2215 BOOL ok =
2216 tp == next->transport &&
2217 !previously_transported(next, TRUE) &&
2218 (addr->flags & (af_pfr|af_file)) == (next->flags & (af_pfr|af_file)) &&
2219 (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0) &&
2220 (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0) &&
2221 same_strings(next->p.errors_address, addr->p.errors_address) &&
2222 same_headers(next->p.extra_headers, addr->p.extra_headers) &&
2223 same_strings(next->p.remove_headers, addr->p.remove_headers) &&
2224 same_ugid(tp, addr, next) &&
2225 ((addr->host_list == NULL && next->host_list == NULL) ||
2226 (addr->host_list != NULL && next->host_list != NULL &&
2227 Ustrcmp(addr->host_list->name, next->host_list->name) == 0));
2228
2229 /* If the transport has a batch_id setting, batch_id will be non-NULL
2230 from the expansion outside the loop. Expand for this address and compare.
2231 Expansion failure makes this address ineligible for batching. */
2232
2233 if (ok && batch_id != NULL)
2234 {
2235 uschar *bid;
2236 address_item *save_nextnext = next->next;
2237 next->next = NULL; /* Expansion for a single address */
2238 deliver_set_expansions(next);
2239 next->next = save_nextnext;
2240 bid = expand_string(tp->batch_id);
2241 deliver_set_expansions(NULL);
2242 if (bid == NULL)
2243 {
2244 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2245 "in %s transport (%s): %s", tp->name, next->address,
2246 expand_string_message);
2247 ok = FALSE;
2248 }
2249 else ok = (Ustrcmp(batch_id, bid) == 0);
2250 }
2251
2252 /* Take address into batch if OK. */
2253
2254 if (ok)
2255 {
2256 *anchor = next->next; /* Include the address */
2257 next->next = NULL;
2258 last->next = next;
2259 last = next;
2260 batch_count++;
2261 }
2262 else anchor = &(next->next); /* Skip the address */
2263 }
2264 }
2265
2266 /* We now have one or more addresses that can be delivered in a batch. Check
2267 whether the transport is prepared to accept a message of this size. If not,
2268 fail them all forthwith. If the expansion fails, or does not yield an
2269 integer, defer delivery. */
2270
2271 if (tp->message_size_limit != NULL)
2272 {
2273 int rc = check_message_size(tp, addr);
2274 if (rc != OK)
2275 {
2276 replicate_status(addr);
2277 while (addr != NULL)
2278 {
2279 addr2 = addr->next;
2280 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2281 addr = addr2;
2282 }
2283 continue; /* With next batch of addresses */
2284 }
2285 }
2286
2287 /* If we are not running the queue, or if forcing, all deliveries will be
2288 attempted. Otherwise, we must respect the retry times for each address. Even
2289 when not doing this, we need to set up the retry key string, and determine
2290 whether a retry record exists, because after a successful delivery, a delete
2291 retry item must be set up. Keep the retry database open only for the duration
2292 of these checks, rather than for all local deliveries, because some local
2293 deliveries (e.g. to pipes) can take a substantial time. */
2294
2295 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
2296 if (dbm_file == NULL)
2297 {
2298 DEBUG(D_deliver|D_retry|D_hints_lookup)
2299 debug_printf("no retry data available\n");
2300 }
2301
2302 addr2 = addr;
2303 addr3 = NULL;
2304 while (addr2 != NULL)
2305 {
2306 BOOL ok = TRUE; /* to deliver this address */
2307 uschar *retry_key;
2308
2309 /* Set up the retry key to include the domain or not, and change its
2310 leading character from "R" to "T". Must make a copy before doing this,
2311 because the old key may be pointed to from a "delete" retry item after
2312 a routing delay. */
2313
2314 retry_key = string_copy(
2315 (tp->retry_use_local_part)? addr2->address_retry_key :
2316 addr2->domain_retry_key);
2317 *retry_key = 'T';
2318
2319 /* Inspect the retry data. If there is no hints file, delivery happens. */
2320
2321 if (dbm_file != NULL)
2322 {
2323 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2324
2325 /* If there is no retry record, delivery happens. If there is,
2326 remember it exists so it can be deleted after a successful delivery. */
2327
2328 if (retry_record != NULL)
2329 {
2330 setflag(addr2, af_lt_retry_exists);
2331
2332 /* A retry record exists for this address. If queue running and not
2333 forcing, inspect its contents. If the record is too old, or if its
2334 retry time has come, or if it has passed its cutoff time, delivery
2335 will go ahead. */
2336
2337 DEBUG(D_retry)
2338 {
2339 debug_printf("retry record exists: age=%s ",
2340 readconf_printtime(now - retry_record->time_stamp));
2341 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2342 debug_printf(" time to retry = %s expired = %d\n",
2343 readconf_printtime(retry_record->next_try - now),
2344 retry_record->expired);
2345 }
2346
2347 if (queue_running && !deliver_force)
2348 {
2349 ok = (now - retry_record->time_stamp > retry_data_expire) ||
2350 (now >= retry_record->next_try) ||
2351 retry_record->expired;
2352
2353 /* If we haven't reached the retry time, there is one more check
2354 to do, which is for the ultimate address timeout. */
2355
2356 if (!ok)
2357 {
2358 retry_config *retry =
2359 retry_find_config(retry_key+2, addr2->domain,
2360 retry_record->basic_errno,
2361 retry_record->more_errno);
2362
2363 DEBUG(D_deliver|D_retry)
2364 {
2365 debug_printf("retry time not reached for %s: "
2366 "checking ultimate address timeout\n", addr2->address);
2367 debug_printf(" now=%d first_failed=%d next_try=%d expired=%d\n",
2368 (int)now, (int)retry_record->first_failed,
2369 (int)retry_record->next_try, retry_record->expired);
2370 }
2371
2372 if (retry != NULL && retry->rules != NULL)
2373 {
2374 retry_rule *last_rule;
2375 for (last_rule = retry->rules;
2376 last_rule->next != NULL;
2377 last_rule = last_rule->next);
2378 DEBUG(D_deliver|D_retry)
2379 debug_printf(" received_time=%d diff=%d timeout=%d\n",
2380 received_time, (int)now - received_time, last_rule->timeout);
2381 if (now - received_time > last_rule->timeout) ok = TRUE;
2382 }
2383 else
2384 {
2385 DEBUG(D_deliver|D_retry)
2386 debug_printf("no retry rule found: assume timed out\n");
2387 ok = TRUE; /* No rule => timed out */
2388 }
2389
2390 DEBUG(D_deliver|D_retry)
2391 {
2392 if (ok) debug_printf("on queue longer than maximum retry for "
2393 "address - allowing delivery\n");
2394 }
2395 }
2396 }
2397 }
2398 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2399 }
2400
2401 /* This address is to be delivered. Leave it on the chain. */
2402
2403 if (ok)
2404 {
2405 addr3 = addr2;
2406 addr2 = addr2->next;
2407 }
2408
2409 /* This address is to be deferred. Take it out of the chain, and
2410 post-process it as complete. Must take it out of the chain first,
2411 because post processing puts it on another chain. */
2412
2413 else
2414 {
2415 address_item *this = addr2;
2416 this->message = US"Retry time not yet reached";
2417 this->basic_errno = ERRNO_LRETRY;
2418 if (addr3 == NULL) addr2 = addr = addr2->next;
2419 else addr2 = addr3->next = addr2->next;
2420 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2421 }
2422 }
2423
2424 if (dbm_file != NULL) dbfn_close(dbm_file);
2425
2426 /* If there are no addresses left on the chain, they all deferred. Loop
2427 for the next set of addresses. */
2428
2429 if (addr == NULL) continue;
2430
2431 /* So, finally, we do have some addresses that can be passed to the
2432 transport. Before doing so, set up variables that are relevant to a
2433 single delivery. */
2434
2435 deliver_set_expansions(addr);
2436 delivery_start = time(NULL);
2437 deliver_local(addr, FALSE);
2438 deliver_time = (int)(time(NULL) - delivery_start);
2439
2440 /* If a shadow transport (which must perforce be another local transport), is
2441 defined, and its condition is met, we must pass the message to the shadow
2442 too, but only those addresses that succeeded. We do this by making a new
2443 chain of addresses - also to keep the original chain uncontaminated. We must
2444 use a chain rather than doing it one by one, because the shadow transport may
2445 batch.
2446
2447 NOTE: if the condition fails because of a lookup defer, there is nothing we
2448 can do! */
2449
2450 if (tp->shadow != NULL &&
2451 (tp->shadow_condition == NULL ||
2452 expand_check_condition(tp->shadow_condition, tp->name, US"transport")))
2453 {
2454 transport_instance *stp;
2455 address_item *shadow_addr = NULL;
2456 address_item **last = &shadow_addr;
2457
2458 for (stp = transports; stp != NULL; stp = stp->next)
2459 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
2460
2461 if (stp == NULL)
2462 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
2463 tp->shadow);
2464
2465 /* Pick off the addresses that have succeeded, and make clones. Put into
2466 the shadow_message field a pointer to the shadow_message field of the real
2467 address. */
2468
2469 else for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2470 {
2471 if (addr2->transport_return != OK) continue;
2472 addr3 = store_get(sizeof(address_item));
2473 *addr3 = *addr2;
2474 addr3->next = NULL;
2475 addr3->shadow_message = (uschar *)(&(addr2->shadow_message));
2476 addr3->transport = stp;
2477 addr3->transport_return = DEFER;
2478 addr3->return_filename = NULL;
2479 addr3->return_file = -1;
2480 *last = addr3;
2481 last = &(addr3->next);
2482 }
2483
2484 /* If we found any addresses to shadow, run the delivery, and stick any
2485 message back into the shadow_message field in the original. */
2486
2487 if (shadow_addr != NULL)
2488 {
2489 int save_count = transport_count;
2490
2491 DEBUG(D_deliver|D_transport)
2492 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2493 deliver_local(shadow_addr, TRUE);
2494
2495 for(; shadow_addr != NULL; shadow_addr = shadow_addr->next)
2496 {
2497 int sresult = shadow_addr->transport_return;
2498 *((uschar **)(shadow_addr->shadow_message)) = (sresult == OK)?
2499 string_sprintf(" ST=%s", stp->name) :
2500 string_sprintf(" ST=%s (%s%s%s)", stp->name,
2501 (shadow_addr->basic_errno <= 0)?
2502 US"" : US strerror(shadow_addr->basic_errno),
2503 (shadow_addr->basic_errno <= 0 || shadow_addr->message == NULL)?
2504 US"" : US": ",
2505 (shadow_addr->message != NULL)? shadow_addr->message :
2506 (shadow_addr->basic_errno <= 0)? US"unknown error" : US"");
2507
2508 DEBUG(D_deliver|D_transport)
2509 debug_printf("%s shadow transport returned %s for %s\n",
2510 stp->name,
2511 (sresult == OK)? "OK" :
2512 (sresult == DEFER)? "DEFER" :
2513 (sresult == FAIL)? "FAIL" :
2514 (sresult == PANIC)? "PANIC" : "?",
2515 shadow_addr->address);
2516 }
2517
2518 DEBUG(D_deliver|D_transport)
2519 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2520
2521 transport_count = save_count; /* Restore original transport count */
2522 }
2523 }
2524
2525 /* Cancel the expansions that were set up for the delivery. */
2526
2527 deliver_set_expansions(NULL);
2528
2529 /* Now we can process the results of the real transport. We must take each
2530 address off the chain first, because post_process_one() puts it on another
2531 chain. */
2532
2533 for (addr2 = addr; addr2 != NULL; addr2 = nextaddr)
2534 {
2535 int result = addr2->transport_return;
2536 nextaddr = addr2->next;
2537
2538 DEBUG(D_deliver|D_transport)
2539 debug_printf("%s transport returned %s for %s\n",
2540 tp->name,
2541 (result == OK)? "OK" :
2542 (result == DEFER)? "DEFER" :
2543 (result == FAIL)? "FAIL" :
2544 (result == PANIC)? "PANIC" : "?",
2545 addr2->address);
2546
2547 /* If there is a retry_record, or if delivery is deferred, build a retry
2548 item for setting a new retry time or deleting the old retry record from
2549 the database. These items are handled all together after all addresses
2550 have been handled (so the database is open just for a short time for
2551 updating). */
2552
2553 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
2554 {
2555 int flags = (result == DEFER)? 0 : rf_delete;
2556 uschar *retry_key = string_copy((tp->retry_use_local_part)?
2557 addr2->address_retry_key : addr2->domain_retry_key);
2558 *retry_key = 'T';
2559 retry_add_item(addr2, retry_key, flags);
2560 }
2561
2562 /* Done with this address */
2563
2564 if (result == OK) addr2->more_errno = deliver_time;
2565 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
2566
2567 /* If a pipe delivery generated text to be sent back, the result may be
2568 changed to FAIL, and we must copy this for subsequent addresses in the
2569 batch. */
2570
2571 if (addr2->transport_return != result)
2572 {
2573 for (addr3 = nextaddr; addr3 != NULL; addr3 = addr3->next)
2574 {
2575 addr3->transport_return = addr2->transport_return;
2576 addr3->basic_errno = addr2->basic_errno;
2577 addr3->message = addr2->message;
2578 }
2579 result = addr2->transport_return;
2580 }
2581
2582 /* Whether or not the result was changed to FAIL, we need to copy the
2583 return_file value from the first address into all the addresses of the
2584 batch, so they are all listed in the error message. */
2585
2586 addr2->return_file = addr->return_file;
2587
2588 /* Change log character for recording successful deliveries. */
2589
2590 if (result == OK) logchar = '-';
2591 }
2592 } /* Loop back for next batch of addresses */
2593 }
2594
2595
2596
2597
2598 /*************************************************
2599 * Sort remote deliveries *
2600 *************************************************/
2601
2602 /* This function is called if remote_sort_domains is set. It arranges that the
2603 chain of addresses for remote deliveries is ordered according to the strings
2604 specified. Try to make this shuffling reasonably efficient by handling
2605 sequences of addresses rather than just single ones.
2606
2607 Arguments: None
2608 Returns: Nothing
2609 */
2610
2611 static void
2612 sort_remote_deliveries(void)
2613 {
2614 int sep = 0;
2615 address_item **aptr = &addr_remote;
2616 uschar *listptr = remote_sort_domains;
2617 uschar *pattern;
2618 uschar patbuf[256];
2619
2620 while (*aptr != NULL &&
2621 (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
2622 != NULL)
2623 {
2624 address_item *moved = NULL;
2625 address_item **bptr = &moved;
2626
2627 while (*aptr != NULL)
2628 {
2629 address_item **next;
2630 deliver_domain = (*aptr)->domain; /* set $domain */
2631 if (match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1,
2632 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
2633 {
2634 aptr = &((*aptr)->next);
2635 continue;
2636 }
2637
2638 next = &((*aptr)->next);
2639 while (*next != NULL &&
2640 (deliver_domain = (*next)->domain, /* Set $domain */
2641 match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1,
2642 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK)
2643 next = &((*next)->next);
2644
2645 /* If the batch of non-matchers is at the end, add on any that were
2646 extracted further up the chain, and end this iteration. Otherwise,
2647 extract them from the chain and hang on the moved chain. */
2648
2649 if (*next == NULL)
2650 {
2651 *next = moved;
2652 break;
2653 }
2654
2655 *bptr = *aptr;
2656 *aptr = *next;
2657 *next = NULL;
2658 bptr = next;
2659 aptr = &((*aptr)->next);
2660 }
2661
2662 /* If the loop ended because the final address matched, *aptr will
2663 be NULL. Add on to the end any extracted non-matching addresses. If
2664 *aptr is not NULL, the loop ended via "break" when *next is null, that
2665 is, there was a string of non-matching addresses at the end. In this
2666 case the extracted addresses have already been added on the end. */
2667
2668 if (*aptr == NULL) *aptr = moved;
2669 }
2670
2671 DEBUG(D_deliver)
2672 {
2673 address_item *addr;
2674 debug_printf("remote addresses after sorting:\n");
2675 for (addr = addr_remote; addr != NULL; addr = addr->next)
2676 debug_printf(" %s\n", addr->address);
2677 }
2678 }
2679
2680
2681
2682 /*************************************************
2683 * Read from pipe for remote delivery subprocess *
2684 *************************************************/
2685
2686 /* This function is called when the subprocess is complete, but can also be
2687 called before it is complete, in order to empty a pipe that is full (to prevent
2688 deadlock). It must therefore keep track of its progress in the parlist data
2689 block.
2690
2691 We read the pipe to get the delivery status codes and a possible error message
2692 for each address, optionally preceded by unusability data for the hosts and
2693 also by optional retry data.
2694
2695 Read in large chunks into the big buffer and then scan through, interpreting
2696 the data therein. In most cases, only a single read will be necessary. No
2697 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
2698 that we read the next chunk when there is less than 2500 bytes left in the
2699 non-final chunk, we can assume each item is complete in the buffer before
2700 handling it. Each item is written using a single write(), which is atomic for
2701 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
2702 often bigger) so even if we are reading while the subprocess is still going, we
2703 should never have only a partial item in the buffer.
2704
2705 Argument:
2706 poffset the offset of the parlist item
2707 eop TRUE if the process has completed
2708
2709 Returns: TRUE if the terminating 'Z' item has been read,
2710 or there has been a disaster (i.e. no more data needed);
2711 FALSE otherwise
2712 */
2713
2714 static BOOL
2715 par_read_pipe(int poffset, BOOL eop)
2716 {
2717 host_item *h;
2718 pardata *p = parlist + poffset;
2719 address_item *addrlist = p->addrlist;
2720 address_item *addr = p->addr;
2721 pid_t pid = p->pid;
2722 int fd = p->fd;
2723 uschar *endptr = big_buffer;
2724 uschar *ptr = endptr;
2725 uschar *msg = p->msg;
2726 BOOL done = p->done;
2727 BOOL unfinished = TRUE;
2728
2729 /* Loop through all items, reading from the pipe when necessary. The pipe
2730 is set up to be non-blocking, but there are two different Unix mechanisms in
2731 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
2732 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
2733 which returns 0 for both end of file and no more data. We distinguish the
2734 two cases by taking 0 as end of file only when we know the process has
2735 completed.
2736
2737 Each separate item is written to the pipe in a single write(), and as they are
2738 all short items, the writes will all be atomic and we should never find
2739 ourselves in the position of having read an incomplete item. "Short" in this
2740 case can mean up to about 1K in the case when there is a long error message
2741 associated with an address. */
2742
2743 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
2744 (int)p->pid, eop? "ended" : "not ended");
2745
2746 while (!done)
2747 {
2748 retry_item *r, **rp;
2749 int remaining = endptr - ptr;
2750
2751 /* Read (first time) or top up the chars in the buffer if necessary.
2752 There will be only one read if we get all the available data (i.e. don't
2753 fill the buffer completely). */
2754
2755 if (remaining < 2500 && unfinished)
2756 {
2757 int len;
2758 int available = big_buffer_size - remaining;
2759
2760 if (remaining > 0) memmove(big_buffer, ptr, remaining);
2761
2762 ptr = big_buffer;
2763 endptr = big_buffer + remaining;
2764 len = read(fd, endptr, available);
2765
2766 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
2767
2768 /* If the result is EAGAIN and the process is not complete, just
2769 stop reading any more and process what we have already. */
2770
2771 if (len < 0)
2772 {
2773 if (!eop && errno == EAGAIN) len = 0; else
2774 {
2775 msg = string_sprintf("failed to read pipe from transport process "
2776 "%d for transport %s: %s", pid, addr->transport->driver_name,
2777 strerror(errno));
2778 break;
2779 }
2780 }
2781
2782 /* If the length is zero (eof or no-more-data), just process what we
2783 already have. Note that if the process is still running and we have
2784 read all the data in the pipe (but less that "available") then we
2785 won't read any more, as "unfinished" will get set FALSE. */
2786
2787 endptr += len;
2788 unfinished = len == available;
2789 }
2790
2791 /* If we are at the end of the available data, exit the loop. */
2792
2793 if (ptr >= endptr) break;
2794
2795 /* Handle each possible type of item, assuming the complete item is
2796 available in store. */
2797
2798 switch (*ptr++)
2799 {
2800 /* Host items exist only if any hosts were marked unusable. Match
2801 up by checking the IP address. */
2802
2803 case 'H':
2804 for (h = addrlist->host_list; h != NULL; h = h->next)
2805 {
2806 if (h->address == NULL || Ustrcmp(h->address, ptr+2) != 0) continue;
2807 h->status = ptr[0];
2808 h->why = ptr[1];
2809 }
2810 ptr += 2;
2811 while (*ptr++);
2812 break;
2813
2814 /* Retry items are sent in a preceding R item for each address. This is
2815 kept separate to keep each message short enough to guarantee it won't
2816 be split in the pipe. Hopefully, in the majority of cases, there won't in
2817 fact be any retry items at all.
2818
2819 The complete set of retry items might include an item to delete a
2820 routing retry if there was a previous routing delay. However, routing
2821 retries are also used when a remote transport identifies an address error.
2822 In that case, there may also be an "add" item for the same key. Arrange
2823 that a "delete" item is dropped in favour of an "add" item. */
2824
2825 case 'R':
2826 if (addr == NULL) goto ADDR_MISMATCH;
2827
2828 DEBUG(D_deliver|D_retry)
2829 debug_printf("reading retry information for %s from subprocess\n",
2830 ptr+1);
2831
2832 /* Cut out any "delete" items on the list. */
2833
2834 for (rp = &(addr->retries); (r = *rp) != NULL; rp = &(r->next))
2835 {
2836 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
2837 {
2838 if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */
2839 *rp = r->next; /* Excise a delete item */
2840 DEBUG(D_deliver|D_retry)
2841 debug_printf(" existing delete item dropped\n");
2842 }
2843 }
2844
2845 /* We want to add a delete item only if there is no non-delete item;
2846 however we still have to step ptr through the data. */
2847
2848 if (r == NULL || (*ptr & rf_delete) == 0)
2849 {
2850 r = store_get(sizeof(retry_item));
2851 r->next = addr->retries;
2852 addr->retries = r;
2853 r->flags = *ptr++;
2854 r->key = string_copy(ptr);
2855 while (*ptr++);
2856 memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno));
2857 ptr += sizeof(r->basic_errno);
2858 memcpy(&(r->more_errno), ptr, sizeof(r->more_errno));
2859 ptr += sizeof(r->more_errno);
2860 r->message = (*ptr)? string_copy(ptr) : NULL;
2861 DEBUG(D_deliver|D_retry)
2862 debug_printf(" added %s item\n",
2863 ((r->flags & rf_delete) == 0)? "retry" : "delete");
2864 }
2865
2866 else
2867 {
2868 DEBUG(D_deliver|D_retry)
2869 debug_printf(" delete item not added: non-delete item exists\n");
2870 ptr++;
2871 while(*ptr++);
2872 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
2873 }
2874
2875 while(*ptr++);
2876 break;
2877
2878 /* Put the amount of data written into the parlist block */
2879
2880 case 'S':
2881 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
2882 ptr += sizeof(transport_count);
2883 break;
2884
2885 /* Address items are in the order of items on the address chain. We
2886 remember the current address value in case this function is called
2887 several times to empty the pipe in stages. Information about delivery
2888 over TLS is sent in a preceding X item for each address. We don't put
2889 it in with the other info, in order to keep each message short enough to
2890 guarantee it won't be split in the pipe. */
2891
2892 #ifdef SUPPORT_TLS
2893 case 'X':
2894 if (addr == NULL) goto ADDR_MISMATCH; /* Below, in 'A' handler */
2895 addr->cipher = (*ptr)? string_copy(ptr) : NULL;
2896 while (*ptr++);
2897 addr->peerdn = (*ptr)? string_copy(ptr) : NULL;
2898 while (*ptr++);
2899 break;
2900 #endif
2901
2902 case 'A':
2903 if (addr == NULL)
2904 {
2905 ADDR_MISMATCH:
2906 msg = string_sprintf("address count mismatch for data read from pipe "
2907 "for transport process %d for transport %s", pid,
2908 addrlist->transport->driver_name);
2909 done = TRUE;
2910 break;
2911 }
2912
2913 addr->transport_return = *ptr++;
2914 addr->special_action = *ptr++;
2915 memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno));
2916 ptr += sizeof(addr->basic_errno);
2917 memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno));
2918 ptr += sizeof(addr->more_errno);
2919 memcpy(&(addr->flags), ptr, sizeof(addr->flags));
2920 ptr += sizeof(addr->flags);
2921 addr->message = (*ptr)? string_copy(ptr) : NULL;
2922 while(*ptr++);
2923 addr->user_message = (*ptr)? string_copy(ptr) : NULL;
2924 while(*ptr++);
2925
2926 /* Always two strings for host information, followed by the port number */
2927
2928 if (*ptr != 0)
2929 {
2930 h = store_get(sizeof(host_item));
2931 h->name = string_copy(ptr);
2932 while (*ptr++);
2933 h->address = string_copy(ptr);
2934 while(*ptr++);
2935 memcpy(&(h->port), ptr, sizeof(h->port));
2936 ptr += sizeof(h->port);
2937 addr->host_used = h;
2938 }
2939 else ptr++;
2940
2941 /* Finished with this address */
2942
2943 addr = addr->next;
2944 break;
2945
2946 /* Z marks the logical end of the data. It is followed by '0' if
2947 continue_transport was NULL at the end of transporting, otherwise '1'.
2948 We need to know when it becomes NULL during a delivery down a passed SMTP
2949 channel so that we don't try to pass anything more down it. Of course, for
2950 most normal messages it will remain NULL all the time. */
2951
2952 case 'Z':
2953 if (*ptr == '0')
2954 {
2955 continue_transport = NULL;
2956 continue_hostname = NULL;
2957 }
2958 done = TRUE;
2959 DEBUG(D_deliver) debug_printf("Z%c item read\n", *ptr);
2960 break;
2961
2962 /* Anything else is a disaster. */
2963
2964 default:
2965 msg = string_sprintf("malformed data (%d) read from pipe for transport "
2966 "process %d for transport %s", ptr[-1], pid,
2967 addr->transport->driver_name);
2968 done = TRUE;
2969 break;
2970 }
2971 }
2972
2973 /* The done flag is inspected externally, to determine whether or not to
2974 call the function again when the process finishes. */
2975
2976 p->done = done;
2977
2978 /* If the process hadn't finished, and we haven't seen the end of the data
2979 or suffered a disaster, update the rest of the state, and return FALSE to
2980 indicate "not finished". */
2981
2982 if (!eop && !done)
2983 {
2984 p->addr = addr;
2985 p->msg = msg;
2986 return FALSE;
2987 }
2988
2989 /* Close our end of the pipe, to prevent deadlock if the far end is still
2990 pushing stuff into it. */
2991
2992 (void)close(fd);
2993 p->fd = -1;
2994
2995 /* If we have finished without error, but haven't had data for every address,
2996 something is wrong. */
2997
2998 if (msg == NULL && addr != NULL)
2999 msg = string_sprintf("insufficient address data read from pipe "
3000 "for transport process %d for transport %s", pid,
3001 addr->transport->driver_name);
3002
3003 /* If an error message is set, something has gone wrong in getting back
3004 the delivery data. Put the message into each address and freeze it. */
3005
3006 if (msg != NULL)
3007 {
3008 for (addr = addrlist; addr != NULL; addr = addr->next)
3009 {
3010 addr->transport_return = DEFER;
3011 addr->special_action = SPECIAL_FREEZE;
3012 addr->message = msg;
3013 }
3014 }
3015
3016 /* Return TRUE to indicate we have got all we need from this process, even
3017 if it hasn't actually finished yet. */
3018
3019 return TRUE;
3020 }
3021
3022
3023
3024 /*************************************************
3025 * Post-process a set of remote addresses *
3026 *************************************************/
3027
3028 /* Do what has to be done immediately after a remote delivery for each set of
3029 addresses, then re-write the spool if necessary. Note that post_process_one
3030 puts the address on an appropriate queue; hence we must fish off the next
3031 one first. This function is also called if there is a problem with setting
3032 up a subprocess to do a remote delivery in parallel. In this case, the final
3033 argument contains a message, and the action must be forced to DEFER.
3034
3035 Argument:
3036 addr pointer to chain of address items
3037 logflags flags for logging
3038 msg NULL for normal cases; -> error message for unexpected problems
3039 fallback TRUE if processing fallback hosts
3040
3041 Returns: nothing
3042 */
3043
3044 static void
3045 remote_post_process(address_item *addr, int logflags, uschar *msg,
3046 BOOL fallback)
3047 {
3048 host_item *h;
3049
3050 /* If any host addresses were found to be unusable, add them to the unusable
3051 tree so that subsequent deliveries don't try them. */
3052
3053 for (h = addr->host_list; h != NULL; h = h->next)
3054 {
3055 if (h->address == NULL) continue;
3056 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3057 }
3058
3059 /* Now handle each address on the chain. The transport has placed '=' or '-'
3060 into the special_action field for each successful delivery. */
3061
3062 while (addr != NULL)
3063 {
3064 address_item *next = addr->next;
3065
3066 /* If msg == NULL (normal processing) and the result is DEFER and we are
3067 processing the main hosts and there are fallback hosts available, put the
3068 address on the list for fallback delivery. */
3069
3070 if (addr->transport_return == DEFER &&
3071 addr->fallback_hosts != NULL &&
3072 !fallback &&
3073 msg == NULL)
3074 {
3075 addr->host_list = addr->fallback_hosts;
3076 addr->next = addr_fallback;
3077 addr_fallback = addr;
3078 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3079 }
3080
3081 /* If msg is set (=> unexpected problem), set it in the address before
3082 doing the ordinary post processing. */
3083
3084 else
3085 {
3086 if (msg != NULL)
3087 {
3088 addr->message = msg;
3089 addr->transport_return = DEFER;
3090 }
3091 (void)post_process_one(addr, addr->transport_return, logflags,
3092 DTYPE_TRANSPORT, addr->special_action);
3093 }
3094
3095 /* Next address */
3096
3097 addr = next;
3098 }
3099
3100 /* If we have just delivered down a passed SMTP channel, and that was
3101 the last address, the channel will have been closed down. Now that
3102 we have logged that delivery, set continue_sequence to 1 so that
3103 any subsequent deliveries don't get "*" incorrectly logged. */
3104
3105 if (continue_transport == NULL) continue_sequence = 1;
3106 }
3107
3108
3109
3110 /*************************************************
3111 * Wait for one remote delivery subprocess *
3112 *************************************************/
3113
3114 /* This function is called while doing remote deliveries when either the
3115 maximum number of processes exist and we need one to complete so that another
3116 can be created, or when waiting for the last ones to complete. It must wait for
3117 the completion of one subprocess, empty the control block slot, and return a
3118 pointer to the address chain.
3119
3120 Arguments: none
3121 Returns: pointer to the chain of addresses handled by the process;
3122 NULL if no subprocess found - this is an unexpected error
3123 */
3124
3125 static address_item *
3126 par_wait(void)
3127 {
3128 int poffset, status;
3129 address_item *addr, *addrlist;
3130 pid_t pid;
3131
3132 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3133 "to finish", message_id);
3134
3135 /* Loop until either a subprocess completes, or there are no subprocesses in
3136 existence - in which case give an error return. We cannot proceed just by
3137 waiting for a completion, because a subprocess may have filled up its pipe, and
3138 be waiting for it to be emptied. Therefore, if no processes have finished, we
3139 wait for one of the pipes to acquire some data by calling select(), with a
3140 timeout just in case.
3141
3142 The simple approach is just to iterate after reading data from a ready pipe.
3143 This leads to non-ideal behaviour when the subprocess has written its final Z
3144 item, closed the pipe, and is in the process of exiting (the common case). A
3145 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3146 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3147 actually finished.
3148
3149 To avoid this, if all the data that is needed has been read from a subprocess
3150 after select(), an explicit wait() for it is done. We know that all it is doing
3151 is writing to the pipe and then exiting, so the wait should not be long.
3152
3153 The non-blocking waitpid() is to some extent just insurance; if we could
3154 reliably detect end-of-file on the pipe, we could always know when to do a
3155 blocking wait() for a completed process. However, because some systems use
3156 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3157 use code that functions without the need to recognize EOF.
3158
3159 There's a double loop here just in case we end up with a process that is not in
3160 the list of remote delivery processes. Something has obviously gone wrong if
3161 this is the case. (For example, a process that is incorrectly left over from
3162 routing or local deliveries might be found.) The damage can be minimized by
3163 looping back and looking for another process. If there aren't any, the error
3164 return will happen. */
3165
3166 for (;;) /* Normally we do not repeat this loop */
3167 {
3168 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3169 {
3170 struct timeval tv;
3171 fd_set select_pipes;
3172 int maxpipe, readycount;
3173
3174 /* A return value of -1 can mean several things. If errno != ECHILD, it
3175 either means invalid options (which we discount), or that this process was
3176 interrupted by a signal. Just loop to try the waitpid() again.
3177
3178 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3179 in existence. This should never happen, and is an unexpected error.
3180 However, there is a nasty complication when running under Linux. If "strace
3181 -f" is being used under Linux to trace this process and its children,
3182 subprocesses are "stolen" from their parents and become the children of the
3183 tracing process. A general wait such as the one we've just obeyed returns
3184 as if there are no children while subprocesses are running. Once a
3185 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3186 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3187 palliative.
3188
3189 This does not happen using "truss" on Solaris, nor (I think) with other
3190 tracing facilities on other OS. It seems to be specific to Linux.
3191
3192 What we do to get round this is to use kill() to see if any of our
3193 subprocesses are still in existence. If kill() gives an OK return, we know
3194 it must be for one of our processes - it can't be for a re-use of the pid,
3195 because if our process had finished, waitpid() would have found it. If any
3196 of our subprocesses are in existence, we proceed to use select() as if
3197 waitpid() had returned zero. I think this is safe. */
3198
3199 if (pid < 0)
3200 {
3201 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3202
3203 DEBUG(D_deliver)
3204 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3205 "for process existence\n");
3206
3207 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3208 {
3209 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3210 {
3211 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3212 "stolen by strace\n", (int)pid);
3213 break; /* With poffset set */
3214 }
3215 }
3216
3217 if (poffset >= remote_max_parallel)
3218 {
3219 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3220 return NULL; /* This is the error return */
3221 }
3222 }
3223
3224 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3225 been handled above. A return value of zero means that there is at least one
3226 subprocess, but there are no completed subprocesses. See if any pipes are
3227 ready with any data for reading. */
3228
3229 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3230
3231 maxpipe = 0;
3232 FD_ZERO(&select_pipes);
3233 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3234 {
3235 if (parlist[poffset].pid != 0)
3236 {
3237 int fd = parlist[poffset].fd;
3238 FD_SET(fd, &select_pipes);
3239 if (fd > maxpipe) maxpipe = fd;
3240 }
3241 }
3242
3243 /* Stick in a 60-second timeout, just in case. */
3244
3245 tv.tv_sec = 60;
3246 tv.tv_usec = 0;
3247
3248 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3249 NULL, NULL, &tv);
3250
3251 /* Scan through the pipes and read any that are ready; use the count
3252 returned by select() to stop when there are no more. Select() can return
3253 with no processes (e.g. if interrupted). This shouldn't matter.
3254
3255 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3256 read, or there was a disaster. In either case, we are finished with this
3257 process. Do an explicit wait() for the process and break the main loop if
3258 it succeeds.
3259
3260 It turns out that we have to deal with the case of an interrupted system
3261 call, which can happen on some operating systems if the signal handling is
3262 set up to do that by default. */
3263
3264 for (poffset = 0;
3265 readycount > 0 && poffset < remote_max_parallel;
3266 poffset++)
3267 {
3268 if ((pid = parlist[poffset].pid) != 0 &&
3269 FD_ISSET(parlist[poffset].fd, &select_pipes))
3270 {
3271 readycount--;
3272 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3273 {
3274 for (;;) /* Loop for signals */
3275 {
3276 pid_t endedpid = waitpid(pid, &status, 0);
3277 if (endedpid == pid) goto PROCESS_DONE;
3278 if (endedpid != (pid_t)(-1) || errno != EINTR)
3279 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3280 "%d (errno = %d) from waitpid() for process %d",
3281 (int)endedpid, errno, (int)pid);
3282 }
3283 }
3284 }
3285 }
3286
3287 /* Now go back and look for a completed subprocess again. */
3288 }
3289
3290 /* A completed process was detected by the non-blocking waitpid(). Find the
3291 data block that corresponds to this subprocess. */
3292
3293 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3294 if (pid == parlist[poffset].pid) break;
3295
3296 /* Found the data block; this is a known remote delivery process. We don't
3297 need to repeat the outer loop. This should be what normally happens. */
3298
3299 if (poffset < remote_max_parallel) break;
3300
3301 /* This situation is an error, but it's probably better to carry on looking
3302 for another process than to give up (as we used to do). */
3303
3304 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
3305 "transport process list", pid);
3306 } /* End of the "for" loop */
3307
3308 /* Come here when all the data was completely read after a select(), and
3309 the process in pid has been wait()ed for. */
3310
3311 PROCESS_DONE:
3312
3313 DEBUG(D_deliver)
3314 {
3315 if (status == 0)
3316 debug_printf("remote delivery process %d ended\n", (int)pid);
3317 else
3318 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
3319 status);
3320 }
3321
3322 set_process_info("delivering %s", message_id);
3323
3324 /* Get the chain of processed addresses */
3325
3326 addrlist = parlist[poffset].addrlist;
3327
3328 /* If the process did not finish cleanly, record an error and freeze (except
3329 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3330 in case the delivery did actually happen. */
3331
3332 if ((status & 0xffff) != 0)
3333 {
3334 uschar *msg;
3335 int msb = (status >> 8) & 255;
3336 int lsb = status & 255;
3337 int code = (msb == 0)? (lsb & 0x7f) : msb;
3338
3339 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
3340 "%s %d",
3341 addrlist->transport->driver_name,
3342 status,
3343 (msb == 0)? "terminated by signal" : "exit code",
3344 code);
3345
3346 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
3347 addrlist->special_action = SPECIAL_FREEZE;
3348
3349 for (addr = addrlist; addr != NULL; addr = addr->next)
3350 {
3351 addr->transport_return = DEFER;
3352 addr->message = msg;
3353 }
3354
3355 remove_journal = FALSE;
3356 }
3357
3358 /* Else complete reading the pipe to get the result of the delivery, if all
3359 the data has not yet been obtained. */
3360
3361 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
3362
3363 /* Put the data count and return path into globals, mark the data slot unused,
3364 decrement the count of subprocesses, and return the address chain. */
3365
3366 transport_count = parlist[poffset].transport_count;
3367 used_return_path = parlist[poffset].return_path;
3368 parlist[poffset].pid = 0;
3369 parcount--;
3370 return addrlist;
3371 }
3372
3373
3374
3375 /*************************************************
3376 * Wait for subprocesses and post-process *
3377 *************************************************/
3378
3379 /* This function waits for subprocesses until the number that are still running
3380 is below a given threshold. For each complete subprocess, the addresses are
3381 post-processed. If we can't find a running process, there is some shambles.
3382 Better not bomb out, as that might lead to multiple copies of the message. Just
3383 log and proceed as if all done.
3384
3385 Arguments:
3386 max maximum number of subprocesses to leave running
3387 fallback TRUE if processing fallback hosts
3388
3389 Returns: nothing
3390 */
3391
3392 static void
3393 par_reduce(int max, BOOL fallback)
3394 {
3395 while (parcount > max)
3396 {
3397 address_item *doneaddr = par_wait();
3398 if (doneaddr == NULL)
3399 {
3400 log_write(0, LOG_MAIN|LOG_PANIC,
3401 "remote delivery process count got out of step");
3402 parcount = 0;
3403 }
3404 else remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
3405 }
3406 }
3407
3408
3409
3410
3411 /*************************************************
3412 * Do remote deliveries *
3413 *************************************************/
3414
3415 /* This function is called to process the addresses in addr_remote. We must
3416 pick off the queue all addresses that have the same transport, remote
3417 destination, and errors address, and hand them to the transport in one go,
3418 subject to some configured limitations. If this is a run to continue delivering
3419 to an existing delivery channel, skip all but those addresses that can go to
3420 that channel. The skipped addresses just get deferred.
3421
3422 If mua_wrapper is set, all addresses must be able to be sent in a single
3423 transaction. If not, this function yields FALSE.
3424
3425 In Exim 4, remote deliveries are always done in separate processes, even
3426 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
3427 is so that the base process can retain privilege. This makes the
3428 implementation of fallback transports feasible (though not initially done.)
3429
3430 We create up to the configured number of subprocesses, each of which passes
3431 back the delivery state via a pipe. (However, when sending down an existing
3432 connection, remote_max_parallel is forced to 1.)
3433
3434 Arguments:
3435 fallback TRUE if processing fallback hosts
3436
3437 Returns: TRUE normally
3438 FALSE if mua_wrapper is set and the addresses cannot all be sent
3439 in one transaction
3440 */
3441
3442 static BOOL
3443 do_remote_deliveries(BOOL fallback)
3444 {
3445 int parmax;
3446 int delivery_count;
3447 int poffset;
3448
3449 parcount = 0; /* Number of executing subprocesses */
3450
3451 /* When sending down an existing channel, only do one delivery at a time.
3452 We use a local variable (parmax) to hold the maximum number of processes;
3453 this gets reduced from remote_max_parallel if we can't create enough pipes. */
3454
3455 if (continue_transport != NULL) remote_max_parallel = 1;
3456 parmax = remote_max_parallel;
3457
3458 /* If the data for keeping a list of processes hasn't yet been
3459 set up, do so. */
3460
3461 if (parlist == NULL)
3462 {
3463 parlist = store_get(remote_max_parallel * sizeof(pardata));
3464 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3465 parlist[poffset].pid = 0;
3466 }
3467
3468 /* Now loop for each remote delivery */
3469
3470 for (delivery_count = 0; addr_remote != NULL; delivery_count++)
3471 {
3472 pid_t pid;
3473 uid_t uid;
3474 gid_t gid;
3475 int pfd[2];
3476 int address_count = 1;
3477 int address_count_max;
3478 BOOL multi_domain;
3479 BOOL use_initgroups;
3480 BOOL pipe_done = FALSE;
3481 transport_instance *tp;
3482 address_item **anchor = &addr_remote;
3483 address_item *addr = addr_remote;
3484 address_item *last = addr;
3485 address_item *next;
3486
3487 /* Pull the first address right off the list. */
3488
3489 addr_remote = addr->next;
3490 addr->next = NULL;
3491
3492 DEBUG(D_deliver|D_transport)
3493 debug_printf("--------> %s <--------\n", addr->address);
3494
3495 /* If no transport has been set, there has been a big screw-up somewhere. */
3496
3497 if ((tp = addr->transport) == NULL)
3498 {
3499 disable_logging = FALSE; /* Jic */
3500 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3501 US"No transport set by router", fallback);
3502 continue;
3503 }
3504
3505 /* Check that this base address hasn't previously been delivered to this
3506 transport. The check is necessary at this point to handle homonymic addresses
3507 correctly in cases where the pattern of redirection changes between delivery
3508 attempts. Non-homonymic previous delivery is detected earlier, at routing
3509 time. */
3510
3511 if (previously_transported(addr, FALSE)) continue;
3512
3513 /* Force failure if the message is too big. */
3514
3515 if (tp->message_size_limit != NULL)
3516 {
3517 int rc = check_message_size(tp, addr);
3518 if (rc != OK)
3519 {
3520 addr->transport_return = rc;
3521 remote_post_process(addr, LOG_MAIN, NULL, fallback);
3522 continue;
3523 }
3524 }
3525
3526 /* Get the flag which specifies whether the transport can handle different
3527 domains that nevertheless resolve to the same set of hosts. */
3528
3529 multi_domain = tp->multi_domain;
3530
3531 /* Get the maximum it can handle in one envelope, with zero meaning
3532 unlimited, which is forced for the MUA wrapper case. */
3533
3534 address_count_max = tp->max_addresses;
3535 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
3536
3537
3538 /************************************************************************/
3539 /***** This is slightly experimental code, but should be safe. *****/
3540
3541 /* The address_count_max value is the maximum number of addresses that the
3542 transport can send in one envelope. However, the transport must be capable of
3543 dealing with any number of addresses. If the number it gets exceeds its
3544 envelope limitation, it must send multiple copies of the message. This can be
3545 done over a single connection for SMTP, so uses less resources than making
3546 multiple connections. On the other hand, if remote_max_parallel is greater
3547 than one, it is perhaps a good idea to use parallel processing to move the
3548 message faster, even if that results in multiple simultaneous connections to
3549 the same host.
3550
3551 How can we come to some compromise between these two ideals? What we do is to
3552 limit the number of addresses passed to a single instance of a transport to
3553 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
3554 number of addresses routed to remote transports divided by
3555 remote_max_parallel. For example, if the message has 100 remote recipients,
3556 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
3557 once. But if rcpt_max is 100, we could send up to 100.
3558
3559 Of course, not all the remotely addresses in a message are going to go to the
3560 same set of hosts (except in smarthost configurations), so this is just a
3561 heuristic way of dividing up the work.
3562
3563 Furthermore (1), because this may not be wanted in some cases, and also to
3564 cope with really pathological cases, there is also a limit to the number of
3565 messages that are sent over one connection. This is the same limit that is
3566 used when sending several different messages over the same connection.
3567 Continue_sequence is set when in this situation, to the number sent so
3568 far, including this message.
3569
3570 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
3571 is probably because they are using VERP, in which case they want to pass only
3572 one address at a time to the transport, in order to be able to use
3573 $local_part and $domain in constructing a new return path. We could test for
3574 the use of these variables, but as it is so likely they will be used when the
3575 maximum is 1, we don't bother. Just leave the value alone. */
3576
3577 if (address_count_max != 1 &&
3578 address_count_max < remote_delivery_count/remote_max_parallel)
3579 {
3580 int new_max = remote_delivery_count/remote_max_parallel;
3581 int message_max = tp->connection_max_messages;
3582 if (connection_max_messages >= 0) message_max = connection_max_messages;
3583 message_max -= continue_sequence - 1;
3584 if (message_max > 0 && new_max > address_count_max * message_max)
3585 new_max = address_count_max * message_max;
3586 address_count_max = new_max;
3587 }
3588
3589 /************************************************************************/
3590
3591
3592 /* Pick off all addresses which have the same transport, errors address,
3593 destination, and extra headers. In some cases they point to the same host
3594 list, but we also need to check for identical host lists generated from
3595 entirely different domains. The host list pointers can be NULL in the case
3596 where the hosts are defined in the transport. There is also a configured
3597 maximum limit of addresses that can be handled at once (see comments above
3598 for how it is computed). */
3599
3600 while ((next = *anchor) != NULL && address_count < address_count_max)
3601 {
3602 if ((multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
3603 &&
3604 tp == next->transport
3605 &&
3606 same_hosts(next->host_list, addr->host_list)
3607 &&
3608 same_strings(next->p.errors_address, addr->p.errors_address)
3609 &&
3610 same_headers(next->p.extra_headers, addr->p.extra_headers)
3611 &&
3612 same_ugid(tp, next, addr)
3613 &&
3614 (next->p.remove_headers == addr->p.remove_headers ||
3615 (next->p.remove_headers != NULL &&
3616 addr->p.remove_headers != NULL &&
3617 Ustrcmp(next->p.remove_headers, addr->p.remove_headers) == 0)))
3618 {
3619 *anchor = next->next;
3620 next->next = NULL;
3621 next->first = addr; /* remember top one (for retry processing) */
3622 last->next = next;
3623 last = next;
3624 address_count++;
3625 }
3626 else anchor = &(next->next);
3627 }
3628
3629 /* If we are acting as an MUA wrapper, all addresses must go in a single
3630 transaction. If not, put them back on the chain and yield FALSE. */
3631
3632 if (mua_wrapper && addr_remote != NULL)
3633 {
3634 last->next = addr_remote;
3635 addr_remote = addr;
3636 return FALSE;
3637 }
3638
3639 /* Set up the expansion variables for this set of addresses */
3640
3641 deliver_set_expansions(addr);
3642
3643 /* Compute the return path, expanding a new one if required. The old one
3644 must be set first, as it might be referred to in the expansion. */
3645
3646 if(addr->p.errors_address != NULL)
3647 return_path = addr->p.errors_address;
3648 #ifdef EXPERIMENTAL_SRS
3649 else if(addr->p.srs_sender != NULL)
3650 return_path = addr->p.srs_sender;
3651 #endif
3652 else
3653 return_path = sender_address;
3654
3655 if (tp->return_path != NULL)
3656 {
3657 uschar *new_return_path = expand_string(tp->return_path);
3658 if (new_return_path == NULL)
3659 {
3660 if (!expand_string_forcedfail)
3661 {
3662 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3663 string_sprintf("Failed to expand return path \"%s\": %s",
3664 tp->return_path, expand_string_message), fallback);
3665 continue;
3666 }
3667 }
3668 else return_path = new_return_path;
3669 }
3670
3671 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
3672 logs and sets up error messages, so we just post-process and continue with
3673 the next address. */
3674
3675 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
3676 {
3677 remote_post_process(addr, LOG_MAIN|LOG_PANIC, NULL, fallback);
3678 continue;
3679 }
3680
3681 /* If this transport has a setup function, call it now so that it gets
3682 run in this process and not in any subprocess. That way, the results of
3683 any setup that are retained by the transport can be reusable. One of the
3684 things the setup does is to set the fallback host lists in the addresses.
3685 That is why it is called at this point, before the continue delivery
3686 processing, because that might use the fallback hosts. */
3687
3688 if (tp->setup != NULL)
3689 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
3690
3691 /* If this is a run to continue delivery down an already-established
3692 channel, check that this set of addresses matches the transport and
3693 the channel. If it does not, defer the addresses. If a host list exists,
3694 we must check that the continue host is on the list. Otherwise, the
3695 host is set in the transport. */
3696
3697 continue_more = FALSE; /* In case got set for the last lot */
3698 if (continue_transport != NULL)
3699 {
3700 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
3701 if (ok && addr->host_list != NULL)
3702 {
3703 host_item *h;
3704 ok = FALSE;
3705 for (h = addr->host_list; h != NULL; h = h->next)
3706 {
3707 if (Ustrcmp(h->name, continue_hostname) == 0)
3708 { ok = TRUE; break; }
3709 }
3710 }
3711
3712 /* Addresses not suitable; defer or queue for fallback hosts (which
3713 might be the continue host) and skip to next address. */
3714
3715 if (!ok)
3716 {
3717 DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n");
3718 next = addr;
3719
3720 if (addr->fallback_hosts != NULL && !fallback)
3721 {
3722 for (;;)
3723 {
3724 next->host_list = next->fallback_hosts;
3725 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
3726 if (next->next == NULL) break;
3727 next = next->next;
3728 }
3729 next->next = addr_fallback;
3730 addr_fallback = addr;
3731 }
3732
3733 else
3734 {
3735 while (next->next != NULL) next = next->next;
3736 next->next = addr_defer;
3737 addr_defer = addr;
3738 }
3739
3740 continue;
3741 }
3742
3743 /* Set a flag indicating whether there are further addresses that list
3744 the continued host. This tells the transport to leave the channel open,
3745 but not to pass it to another delivery process. */
3746
3747 for (next = addr_remote; next != NULL; next = next->next)
3748 {
3749 host_item *h;
3750 for (h = next->host_list; h != NULL; h = h->next)
3751 {
3752 if (Ustrcmp(h->name, continue_hostname) == 0)
3753 { continue_more = TRUE; break; }
3754 }
3755 }
3756 }
3757
3758 /* The transports set up the process info themselves as they may connect
3759 to more than one remote machine. They also have to set up the filter
3760 arguments, if required, so that the host name and address are available
3761 for expansion. */
3762
3763 transport_filter_argv = NULL;
3764
3765 /* Create the pipe for inter-process communication. If pipe creation
3766 fails, it is probably because the value of remote_max_parallel is so
3767 large that too many file descriptors for pipes have been created. Arrange
3768 to wait for a process to finish, and then try again. If we still can't
3769 create a pipe when all processes have finished, break the retry loop. */
3770
3771 while (!pipe_done)
3772 {
3773 if (pipe(pfd) == 0) pipe_done = TRUE;
3774 else if (parcount > 0) parmax = parcount;
3775 else break;
3776
3777 /* We need to make the reading end of the pipe non-blocking. There are
3778 two different options for this. Exim is cunningly (I hope!) coded so
3779 that it can use either of them, though it prefers O_NONBLOCK, which
3780 distinguishes between EOF and no-more-data. */
3781
3782 #ifdef O_NONBLOCK
3783 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
3784 #else
3785 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
3786 #endif
3787
3788 /* If the maximum number of subprocesses already exist, wait for a process
3789 to finish. If we ran out of file descriptors, parmax will have been reduced
3790 from its initial value of remote_max_parallel. */
3791
3792 par_reduce(parmax - 1, fallback);
3793 }
3794
3795 /* If we failed to create a pipe and there were no processes to wait
3796 for, we have to give up on this one. Do this outside the above loop
3797 so that we can continue the main loop. */
3798
3799 if (!pipe_done)
3800 {
3801 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3802 string_sprintf("unable to create pipe: %s", strerror(errno)), fallback);
3803 continue;
3804 }
3805
3806 /* Find a free slot in the pardata list. Must do this after the possible
3807 waiting for processes to finish, because a terminating process will free
3808 up a slot. */
3809
3810 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3811 if (parlist[poffset].pid == 0) break;
3812
3813 /* If there isn't one, there has been a horrible disaster. */
3814
3815 if (poffset >= remote_max_parallel)
3816 {
3817 (void)close(pfd[pipe_write]);
3818 (void)close(pfd[pipe_read]);
3819 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3820 US"Unexpectedly no free subprocess slot", fallback);
3821 continue;
3822 }
3823
3824 /* Now fork a subprocess to do the remote delivery, but before doing so,
3825 ensure that any cached resourses are released so as not to interfere with
3826 what happens in the subprocess. */
3827
3828 search_tidyup();
3829
3830 if ((pid = fork()) == 0)
3831 {
3832 int fd = pfd[pipe_write];
3833 host_item *h;
3834
3835 /* There are weird circumstances in which logging is disabled */
3836
3837 disable_logging = tp->disable_logging;
3838
3839 /* Show pids on debug output if parallelism possible */
3840
3841 if (parmax > 1 && (parcount > 0 || addr_remote != NULL))
3842 {
3843 DEBUG(D_any|D_v) debug_selector |= D_pid;
3844 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
3845 }
3846
3847 /* Reset the random number generator, so different processes don't all
3848 have the same sequence. In the test harness we want different, but
3849 predictable settings for each delivery process, so do something explicit
3850 here rather they rely on the fixed reset in the random number function. */
3851
3852 random_seed = running_in_test_harness? 42 + 2*delivery_count : 0;
3853
3854 /* Set close-on-exec on the pipe so that it doesn't get passed on to
3855 a new process that may be forked to do another delivery down the same
3856 SMTP connection. */
3857
3858 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
3859
3860 /* Close open file descriptors for the pipes of other processes
3861 that are running in parallel. */
3862
3863 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3864 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
3865
3866 /* This process has inherited a copy of the file descriptor
3867 for the data file, but its file pointer is shared with all the
3868 other processes running in parallel. Therefore, we have to re-open
3869 the file in order to get a new file descriptor with its own
3870 file pointer. We don't need to lock it, as the lock is held by
3871 the parent process. There doesn't seem to be any way of doing
3872 a dup-with-new-file-pointer. */
3873
3874 (void)close(deliver_datafile);
3875 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir,
3876 message_id);
3877 deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0);
3878
3879 if (deliver_datafile < 0)
3880 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
3881 "parallel delivery: %s", spoolname, strerror(errno));
3882
3883 /* Set the close-on-exec flag */
3884
3885 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
3886 FD_CLOEXEC);
3887
3888 /* Set the uid/gid of this process; bombs out on failure. */
3889
3890 exim_setugid(uid, gid, use_initgroups,
3891 string_sprintf("remote delivery to %s with transport=%s",
3892 addr->address, tp->name));
3893
3894 /* Close the unwanted half of this process' pipe, set the process state,
3895 and run the transport. Afterwards, transport_count will contain the number
3896 of bytes written. */
3897
3898 (void)close(pfd[pipe_read]);
3899 set_process_info("delivering %s using %s", message_id, tp->name);
3900 debug_print_string(tp->debug_string);
3901 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
3902
3903 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
3904 message_id, tp->name, addr->address, (addr->next == NULL)? "" : ", ...");
3905
3906 /* Ensure any cached resources that we used are now released */
3907
3908 search_tidyup();
3909
3910 /* Pass the result back down the pipe. This is a lot more information
3911 than is needed for a local delivery. We have to send back the error
3912 status for each address, the usability status for each host that is
3913 flagged as unusable, and all the retry items. When TLS is in use, we
3914 send also the cipher and peerdn information. Each type of information
3915 is flagged by an identifying byte, and is then in a fixed format (with
3916 strings terminated by zeros), and there is a final terminator at the
3917 end. The host information and retry information is all attached to
3918 the first address, so that gets sent at the start. */
3919
3920 /* Host unusability information: for most success cases this will
3921 be null. */
3922
3923 for (h = addr->host_list; h != NULL; h = h->next)
3924 {
3925 if (h->address == NULL || h->status < hstatus_unusable) continue;
3926 sprintf(CS big_buffer, "H%c%c%s", h->status, h->why, h->address);
3927 (void)write(fd, big_buffer, Ustrlen(big_buffer+3) + 4);
3928 }
3929
3930 /* The number of bytes written. This is the same for each address. Even
3931 if we sent several copies of the message down the same connection, the
3932 size of each one is the same, and it's that value we have got because
3933 transport_count gets reset before calling transport_write_message(). */
3934
3935 big_buffer[0] = 'S';
3936 memcpy(big_buffer+1, &transport_count, sizeof(transport_count));
3937 (void)write(fd, big_buffer, sizeof(transport_count) + 1);
3938
3939 /* Information about what happened to each address. Three item types are
3940 used: an optional 'X' item first, for TLS information, followed by 'R'
3941 items for any retry settings, and finally an 'A' item for the remaining
3942 data. */
3943
3944 for(; addr != NULL; addr = addr->next)
3945 {
3946 uschar *ptr;
3947 retry_item *r;
3948
3949 /* The certificate verification status goes into the flags */
3950
3951 if (tls_certificate_verified) setflag(addr, af_cert_verified);
3952
3953 /* Use an X item only if there's something to send */
3954
3955 #ifdef SUPPORT_TLS
3956 if (addr->cipher != NULL)
3957 {
3958 ptr = big_buffer;
3959 *ptr++ = 'X';
3960 sprintf(CS ptr, "%.128s", addr->cipher);
3961 while(*ptr++);
3962 if (addr->peerdn == NULL) *ptr++ = 0; else
3963 {
3964 sprintf(CS ptr, "%.512s", addr->peerdn);
3965 while(*ptr++);
3966 }
3967 (void)write(fd, big_buffer, ptr - big_buffer);
3968 }
3969 #endif
3970
3971 /* Retry information: for most success cases this will be null. */
3972
3973 for (r = addr->retries; r != NULL; r = r->next)
3974 {
3975 uschar *ptr;
3976 sprintf(CS big_buffer, "R%c%.500s", r->flags, r->key);
3977 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
3978 memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno));
3979 ptr += sizeof(r->basic_errno);
3980 memcpy(ptr, &(r->more_errno), sizeof(r->more_errno));
3981 ptr += sizeof(r->more_errno);
3982 if (r->message == NULL) *ptr++ = 0; else
3983 {
3984 sprintf(CS ptr, "%.512s", r->message);
3985 while(*ptr++);
3986 }
3987 (void)write(fd, big_buffer, ptr - big_buffer);
3988 }
3989
3990 /* The rest of the information goes in an 'A' item. */
3991
3992 ptr = big_buffer + 3;
3993 sprintf(CS big_buffer, "A%c%c", addr->transport_return,
3994 addr->special_action);
3995 memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno));
3996 ptr += sizeof(addr->basic_errno);
3997 memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno));
3998 ptr += sizeof(addr->more_errno);
3999 memcpy(ptr, &(addr->flags), sizeof(addr->flags));
4000 ptr += sizeof(addr->flags);
4001
4002 if (addr->message == NULL) *ptr++ = 0; else
4003 {
4004 sprintf(CS ptr, "%.1024s", addr->message);
4005 while(*ptr++);
4006 }
4007
4008 if (addr->user_message == NULL) *ptr++ = 0; else
4009 {
4010 sprintf(CS ptr, "%.1024s", addr->user_message);
4011 while(*ptr++);
4012 }
4013
4014 if (addr->host_used == NULL) *ptr++ = 0; else
4015 {
4016 sprintf(CS ptr, "%.256s", addr->host_used->name);
4017 while(*ptr++);
4018 sprintf(CS ptr, "%.64s", addr->host_used->address);
4019 while(*ptr++);
4020 memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port));
4021 ptr += sizeof(addr->host_used->port);
4022 }
4023 (void)write(fd, big_buffer, ptr - big_buffer);
4024 }
4025
4026 /* Add termination flag, close the pipe, and that's it. The character
4027 after 'Z' indicates whether continue_transport is now NULL or not.
4028 A change from non-NULL to NULL indicates a problem with a continuing
4029 connection. */
4030
4031 big_buffer[0] = 'Z';
4032 big_buffer[1] = (continue_transport == NULL)? '0' : '1';
4033 (void)write(fd, big_buffer, 2);
4034 (void)close(fd);
4035 exit(EXIT_SUCCESS);
4036 }
4037
4038 /* Back in the mainline: close the unwanted half of the pipe. */
4039
4040 (void)close(pfd[pipe_write]);
4041
4042 /* Fork failed; defer with error message */
4043
4044 if (pid < 0)
4045 {
4046 (void)close(pfd[pipe_read]);
4047 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4048 string_sprintf("fork failed for remote delivery to %s: %s",
4049 addr->domain, strerror(errno)), fallback);
4050 continue;
4051 }
4052
4053 /* Fork succeeded; increment the count, and remember relevant data for
4054 when the process finishes. */
4055
4056 parcount++;
4057 parlist[poffset].addrlist = parlist[poffset].addr = addr;
4058 parlist[poffset].pid = pid;
4059 parlist[poffset].fd = pfd[pipe_read];
4060 parlist[poffset].done = FALSE;
4061 parlist[poffset].msg = NULL;
4062 parlist[poffset].return_path = return_path;
4063
4064 /* If the process we've just started is sending a message down an existing
4065 channel, wait for it now. This ensures that only one such process runs at
4066 once, whatever the value of remote_max parallel. Otherwise, we might try to
4067 send two or more messages simultaneously down the same channel. This could
4068 happen if there are different domains that include the same host in otherwise
4069 different host lists.
4070
4071 Also, if the transport closes down the channel, this information gets back
4072 (continue_transport gets set to NULL) before we consider any other addresses
4073 in this message. */
4074
4075 if (continue_transport != NULL) par_reduce(0, fallback);
4076
4077 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4078 newly created process get going before we create another process. This should
4079 ensure repeatability in the tests. We only need to wait a tad. */
4080
4081 else if (running_in_test_harness) millisleep(500);
4082 }
4083
4084 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4085 are still running and post-process their addresses. */
4086
4087 par_reduce(0, fallback);
4088 return TRUE;
4089 }
4090
4091
4092
4093
4094 /*************************************************
4095 * Split an address into local part and domain *
4096 *************************************************/
4097
4098 /* This function initializes an address for routing by splitting it up into a
4099 local part and a domain. The local part is set up twice - once in its original
4100 casing, and once in lower case, and it is dequoted. We also do the "percent
4101 hack" for configured domains. This may lead to a DEFER result if a lookup
4102 defers. When a percent-hacking takes place, we insert a copy of the original
4103 address as a new parent of this address, as if we have had a redirection.
4104
4105 Argument:
4106 addr points to an addr_item block containing the address
4107
4108 Returns: OK
4109 DEFER - could not determine if domain is %-hackable
4110 */
4111
4112 int
4113 deliver_split_address(address_item *addr)
4114 {
4115 uschar *address = addr->address;
4116 uschar *domain = Ustrrchr(address, '@');
4117 uschar *t;
4118 int len = domain - address;
4119
4120 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
4121
4122 /* The implication in the RFCs (though I can't say I've seen it spelled out
4123 explicitly) is that quoting should be removed from local parts at the point
4124 where they are locally interpreted. [The new draft "821" is more explicit on
4125 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4126 removing quoting backslashes and any unquoted doublequotes. */
4127
4128 t = addr->cc_local_part = store_get(len+1);
4129 while(len-- > 0)
4130 {
4131 register int c = *address++;
4132 if (c == '\"') continue;
4133 if (c == '\\')
4134 {
4135 *t++ = *address++;
4136 len--;
4137 }
4138 else *t++ = c;
4139 }
4140 *t = 0;
4141
4142 /* We do the percent hack only for those domains that are listed in
4143 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4144
4145 if (percent_hack_domains != NULL)
4146 {
4147 int rc;
4148 uschar *new_address = NULL;
4149 uschar *local_part = addr->cc_local_part;
4150
4151 deliver_domain = addr->domain; /* set $domain */
4152
4153 while ((rc = match_isinlist(deliver_domain, &percent_hack_domains, 0,
4154 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
4155 == OK &&
4156 (t = Ustrrchr(local_part, '%')) != NULL)
4157 {
4158 new_address = string_copy(local_part);
4159 new_address[t - local_part] = '@';
4160 deliver_domain = string_copylc(t+1);
4161 local_part = string_copyn(local_part, t - local_part);
4162 }
4163
4164 if (rc == DEFER) return DEFER; /* lookup deferred */
4165
4166 /* If hackery happened, set up new parent and alter the current address. */
4167
4168 if (new_address != NULL)
4169 {
4170 address_item *new_parent = store_get(sizeof(address_item));
4171 *new_parent = *addr;
4172 addr->parent = new_parent;
4173 addr->address = new_address;
4174 addr->unique = string_copy(new_address);
4175 addr->domain = deliver_domain;
4176 addr->cc_local_part = local_part;
4177 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
4178 addr->address);
4179 }
4180 }
4181
4182 /* Create the lowercased version of the final local part, and make that the
4183 default one to be used. */
4184
4185 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
4186 return OK;
4187 }
4188
4189
4190
4191
4192 /*************************************************
4193 * Get next error message text *
4194 *************************************************/
4195
4196 /* If f is not NULL, read the next "paragraph", from a customized error message
4197 text file, terminated by a line containing ****, and expand it.
4198
4199 Arguments:
4200 f NULL or a file to read from
4201 which string indicating which string (for errors)
4202
4203 Returns: NULL or an expanded string
4204 */
4205
4206 static uschar *
4207 next_emf(FILE *f, uschar *which)
4208 {
4209 int size = 256;
4210 int ptr = 0;
4211 uschar *para, *yield;
4212 uschar buffer[256];
4213
4214 if (f == NULL) return NULL;
4215
4216 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4217 Ustrcmp(buffer, "****\n") == 0) return NULL;
4218
4219 para = store_get(size);
4220 for (;;)
4221 {
4222 para = string_cat(para, &size, &ptr, buffer, Ustrlen(buffer));
4223 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4224 Ustrcmp(buffer, "****\n") == 0) break;
4225 }
4226 para[ptr] = 0;
4227
4228 yield = expand_string(para);
4229 if (yield != NULL) return yield;
4230
4231 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
4232 "bounce_message_file or warn_message_file (%s): %s", which,
4233 expand_string_message);
4234 return NULL;
4235 }
4236
4237
4238
4239
4240 /*************************************************
4241 * Close down a passed transport channel *
4242 *************************************************/
4243
4244 /* This function is called when a passed transport channel cannot be used.
4245 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
4246 so that the function call can be the argument of a "return" statement.
4247
4248 Arguments: None
4249 Returns: DELIVER_NOT_ATTEMPTED
4250 */
4251
4252 static int
4253 continue_closedown(void)
4254 {
4255 if (continue_transport != NULL)
4256 {
4257 transport_instance *t;
4258 for (t = transports; t != NULL; t = t->next)
4259 {
4260 if (Ustrcmp(t->name, continue_transport) == 0)
4261 {
4262 if (t->info->closedown != NULL) (t->info->closedown)(t);
4263 break;
4264 }
4265 }
4266 }
4267 return DELIVER_NOT_ATTEMPTED;
4268 }
4269
4270
4271
4272
4273 /*************************************************
4274 * Print address information *
4275 *************************************************/
4276
4277 /* This function is called to output an address, or information about an
4278 address, for bounce or defer messages. If the hide_child flag is set, all we
4279 output is the original ancestor address.
4280
4281 Arguments:
4282 addr points to the address
4283 f the FILE to print to
4284 si an initial string
4285 sc a continuation string for before "generated"
4286 se an end string
4287
4288 Returns: TRUE if the address is not hidden
4289 */
4290
4291 static BOOL
4292 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
4293 uschar *se)
4294 {
4295 BOOL yield = TRUE;
4296 uschar *printed = US"";
4297 address_item *ancestor = addr;
4298 while (ancestor->parent != NULL) ancestor = ancestor->parent;
4299
4300 fprintf(f, "%s", CS si);
4301
4302 if (addr->parent != NULL && testflag(addr, af_hide_child))
4303 {
4304 printed = US"an undisclosed address";
4305 yield = FALSE;
4306 }
4307 else if (!testflag(addr, af_pfr) || addr->parent == NULL)
4308 printed = addr->address;
4309
4310 else
4311 {
4312 uschar *s = addr->address;
4313 uschar *ss;
4314
4315 if (addr->address[0] == '>') { ss = US"mail"; s++; }
4316 else if (addr->address[0] == '|') ss = US"pipe";
4317 else ss = US"save";
4318
4319 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
4320 printed = addr->parent->address;
4321 }
4322
4323 fprintf(f, "%s", CS string_printing(printed));
4324
4325 if (ancestor != addr)
4326 {
4327 uschar *original = (ancestor->onetime_parent == NULL)?
4328 ancestor->address : ancestor->onetime_parent;
4329 if (strcmpic(original, printed) != 0)
4330 fprintf(f, "%s(%sgenerated from %s)", sc,
4331 (ancestor != addr->parent)? "ultimately " : "",
4332 string_printing(original));
4333 }
4334
4335 fprintf(f, "%s", CS se);
4336 return yield;
4337 }
4338
4339
4340
4341
4342
4343 /*************************************************
4344 * Print error for an address *
4345 *************************************************/
4346
4347 /* This function is called to print the error information out of an address for
4348 a bounce or a warning message. It tries to format the message reasonably by
4349 introducing newlines. All lines are indented by 4; the initial printing
4350 position must be set before calling.
4351
4352 This function used always to print the error. Nowadays we want to restrict it
4353 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
4354 and filter "fail". We no longer pass other information willy-nilly in bounce
4355 and warning messages. Text in user_message is always output; text in message
4356 only if the af_pass_message flag is set.
4357
4358 Arguments:
4359 addr the address
4360 f the FILE to print on
4361 t some leading text
4362
4363 Returns: nothing
4364 */
4365
4366 static void
4367 print_address_error(address_item *addr, FILE *f, uschar *t)
4368 {
4369 int count = Ustrlen(t);
4370 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
4371
4372 if (s == NULL)
4373 {
4374 if (addr->user_message != NULL) s = addr->user_message; else return;
4375 }
4376
4377 fprintf(f, "\n %s", t);
4378
4379 while (*s != 0)
4380 {
4381 if (*s == '\\' && s[1] == 'n')
4382 {
4383 fprintf(f, "\n ");
4384 s += 2;
4385 count = 0;
4386 }
4387 else
4388 {
4389 fputc(*s, f);
4390 count++;
4391 if (*s++ == ':' && isspace(*s) && count > 45)
4392 {
4393 fprintf(f, "\n "); /* sic (because space follows) */
4394 count = 0;
4395 }
4396 }
4397 }
4398 }
4399
4400
4401
4402
4403
4404
4405 /*************************************************
4406 * Check list of addresses for duplication *
4407 *************************************************/
4408
4409 /* This function was introduced when the test for duplicate addresses that are
4410 not pipes, files, or autoreplies was moved from the middle of routing to when
4411 routing was complete. That was to fix obscure cases when the routing history
4412 affects the subsequent routing of identical addresses. This function is called
4413 after routing, to check that the final routed addresses are not duplicates.
4414
4415 If we detect a duplicate, we remember what it is a duplicate of. Note that
4416 pipe, file, and autoreply de-duplication is handled during routing, so we must
4417 leave such "addresses" alone here, as otherwise they will incorrectly be
4418 discarded.
4419
4420 Argument: address of list anchor
4421 Returns: nothing
4422 */
4423
4424 static void
4425 do_duplicate_check(address_item **anchor)
4426 {
4427 address_item *addr;
4428 while ((addr = *anchor) != NULL)
4429 {
4430 tree_node *tnode;
4431 if (testflag(addr, af_pfr))
4432 {
4433 anchor = &(addr->next);
4434 }
4435 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
4436 {
4437 DEBUG(D_deliver|D_route)
4438 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
4439 *anchor = addr->next;
4440 addr->dupof = tnode->data.ptr;
4441 addr->next = addr_duplicate;
4442 addr_duplicate = addr;
4443 }
4444 else
4445 {
4446 tree_add_duplicate(addr->unique, addr);
4447 anchor = &(addr->next);
4448 }
4449 }
4450 }
4451
4452
4453
4454
4455 /*************************************************
4456 * Deliver one message *
4457 *************************************************/
4458
4459 /* This is the function which is called when a message is to be delivered. It
4460 is passed the id of the message. It is possible that the message no longer
4461 exists, if some other process has delivered it, and it is also possible that
4462 the message is being worked on by another process, in which case the data file
4463 will be locked.
4464
4465 If no delivery is attempted for any of the above reasons, the function returns
4466 DELIVER_NOT_ATTEMPTED.
4467
4468 If the give_up flag is set true, do not attempt any deliveries, but instead
4469 fail all outstanding addresses and return the message to the sender (or
4470 whoever).
4471
4472 A delivery operation has a process all to itself; we never deliver more than
4473 one message in the same process. Therefore we needn't worry too much about
4474 store leakage.
4475
4476 Arguments:
4477 id the id of the message to be delivered
4478 forced TRUE if delivery was forced by an administrator; this overrides
4479 retry delays and causes a delivery to be tried regardless
4480 give_up TRUE if an administrator has requested that delivery attempts
4481 be abandoned
4482
4483 Returns: When the global variable mua_wrapper is FALSE:
4484 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
4485 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
4486 When the global variable mua_wrapper is TRUE:
4487 DELIVER_MUA_SUCCEEDED if delivery succeeded
4488 DELIVER_MUA_FAILED if delivery failed
4489 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
4490 */
4491
4492 int
4493 deliver_message(uschar *id, BOOL forced, BOOL give_up)
4494 {
4495 int i, rc;
4496 int final_yield = DELIVER_ATTEMPTED_NORMAL;
4497 time_t now = time(NULL);
4498 address_item *addr_last = NULL;
4499 uschar *filter_message = NULL;
4500 FILE *jread;
4501 int process_recipients = RECIP_ACCEPT;
4502 open_db dbblock;
4503 open_db *dbm_file;
4504
4505 uschar *info = (queue_run_pid == (pid_t)0)?
4506 string_sprintf("delivering %s", id) :
4507 string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
4508
4509 /* If the D_process_info bit is on, set_process_info() will output debugging
4510 information. If not, we want to show this initial information if D_deliver or
4511 D_queue_run is set or in verbose mode. */
4512
4513 set_process_info("%s", info);
4514
4515 if ((debug_selector & D_process_info) == 0 &&
4516 (debug_selector & (D_deliver|D_queue_run|D_v)) != 0)
4517 debug_printf("%s\n", info);
4518
4519 /* Ensure that we catch any subprocesses that are created. Although Exim
4520 sets SIG_DFL as its initial default, some routes through the code end up
4521 here with it set to SIG_IGN - cases where a non-synchronous delivery process
4522 has been forked, but no re-exec has been done. We use sigaction rather than
4523 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
4524 sure it is turned off. (There was a problem on AIX with this.) */
4525
4526 #ifdef SA_NOCLDWAIT
4527 {
4528 struct sigaction act;
4529 act.sa_handler = SIG_DFL;
4530 sigemptyset(&(act.sa_mask));
4531 act.sa_flags = 0;
4532 sigaction(SIGCHLD, &act, NULL);
4533 }
4534 #else
4535 signal(SIGCHLD, SIG_DFL);
4536 #endif
4537
4538 /* Make the forcing flag available for routers and transports, set up the
4539 global message id field, and initialize the count for returned files and the
4540 message size. This use of strcpy() is OK because the length id is checked when
4541 it is obtained from a command line (the -M or -q options), and otherwise it is
4542 known to be a valid message id. */
4543
4544 Ustrcpy(message_id, id);
4545 deliver_force = forced;
4546 return_count = 0;
4547 message_size = 0;
4548
4549 /* Initialize some flags */
4550
4551 update_spool = FALSE;
4552 remove_journal = TRUE;
4553
4554 /* Reset the random number generator, so that if several delivery processes are
4555 started from a queue runner that has already used random numbers (for sorting),
4556 they don't all get the same sequence. */
4557
4558 random_seed = 0;
4559
4560 /* Open and lock the message's data file. Exim locks on this one because the
4561 header file may get replaced as it is re-written during the delivery process.
4562 Any failures cause messages to be written to the log, except for missing files
4563 while queue running - another process probably completed delivery. As part of
4564 opening the data file, message_subdir gets set. */
4565
4566 if (!spool_open_datafile(id))
4567 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4568
4569 /* The value of message_size at this point has been set to the data length,
4570 plus one for the blank line that notionally precedes the data. */
4571
4572 /* Now read the contents of the header file, which will set up the headers in
4573 store, and also the list of recipients and the tree of non-recipients and
4574 assorted flags. It updates message_size. If there is a reading or format error,
4575 give up; if the message has been around for sufficiently long, remove it. */
4576
4577 sprintf(CS spoolname, "%s-H", id);
4578 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
4579 {
4580 if (errno == ERRNO_SPOOLFORMAT)
4581 {
4582 struct stat statbuf;
4583 sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
4584 spoolname);
4585 if (Ustat(big_buffer, &statbuf) == 0)
4586 log_write(0, LOG_MAIN, "Format error in spool file %s: "
4587 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
4588 else log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
4589 }
4590 else
4591 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
4592 strerror(errno));
4593
4594 /* If we managed to read the envelope data, received_time contains the
4595 time the message was received. Otherwise, we can calculate it from the
4596 message id. */
4597
4598 if (rc != spool_read_hdrerror)
4599 {
4600 received_time = 0;
4601 for (i = 0; i < 6; i++)
4602 received_time = received_time * BASE_62 + tab62[id[i] - '0'];
4603 }
4604
4605 /* If we've had this malformed message too long, sling it. */
4606
4607 if (now - received_time > keep_malformed)
4608 {
4609 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
4610 Uunlink(spoolname);
4611 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
4612 Uunlink(spoolname);
4613 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
4614 Uunlink(spoolname);
4615 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
4616 Uunlink(spoolname);
4617 log_write(0, LOG_MAIN, "Message removed because older than %s",
4618 readconf_printtime(keep_malformed));
4619 }
4620
4621 (void)close(deliver_datafile);
4622 deliver_datafile = -1;
4623 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4624 }
4625
4626 /* The spool header file has been read. Look to see if there is an existing
4627 journal file for this message. If there is, it means that a previous delivery
4628 attempt crashed (program or host) before it could update the spool header file.
4629 Read the list of delivered addresses from the journal and add them to the
4630 nonrecipients tree. Then update the spool file. We can leave the journal in
4631 existence, as it will get further successful deliveries added to it in this
4632 run, and it will be deleted if this function gets to its end successfully.
4633 Otherwise it might be needed again. */
4634
4635 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
4636 jread = Ufopen(spoolname, "rb");
4637 if (jread != NULL)
4638 {
4639 while (Ufgets(big_buffer, big_buffer_size, jread) != NULL)
4640 {
4641 int n = Ustrlen(big_buffer);
4642 big_buffer[n-1] = 0;
4643 tree_add_nonrecipient(big_buffer);
4644 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
4645 "journal file\n", big_buffer);
4646 }
4647 (void)fclose(jread);
4648 /* Panic-dies on error */
4649 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
4650 }
4651 else if (errno != ENOENT)
4652 {
4653 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
4654 "%s", strerror(errno));
4655 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4656 }
4657
4658 /* A null recipients list indicates some kind of disaster. */
4659
4660 if (recipients_list == NULL)
4661 {
4662 (void)close(deliver_datafile);
4663 deliver_datafile = -1;
4664 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", spoolname);
4665 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4666 }
4667
4668
4669 /* Handle a message that is frozen. There are a number of different things that
4670 can happen, but in the default situation, unless forced, no delivery is
4671 attempted. */
4672
4673 if (deliver_freeze)
4674 {
4675 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
4676 /* Moving to another directory removes the message from Exim's view. Other
4677 tools must be used to deal with it. Logging of this action happens in
4678 spool_move_message() and its subfunctions. */
4679
4680 if (move_frozen_messages &&
4681 spool_move_message(id, message_subdir, US"", US"F"))
4682 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4683 #endif
4684
4685 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
4686 maximum time to keep messages that are frozen. Thaw if we reach it, with a
4687 flag causing all recipients to be failed. The time is the age of the
4688 message, not the time since freezing. */
4689
4690 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
4691 {
4692 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
4693 process_recipients = RECIP_FAIL_TIMEOUT;
4694 }
4695
4696 /* For bounce messages (and others with no sender), thaw if the error message
4697 ignore timer is exceeded. The message will be discarded if this delivery
4698 fails. */
4699
4700 else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
4701 {
4702 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
4703 }
4704
4705 /* If this is a bounce message, or there's no auto thaw, or we haven't
4706 reached the auto thaw time yet, and this delivery is not forced by an admin
4707 user, do not attempt delivery of this message. Note that forced is set for
4708 continuing messages down the same channel, in order to skip load checking and
4709 ignore hold domains, but we don't want unfreezing in that case. */
4710
4711 else
4712 {
4713 if ((sender_address[0] == 0 ||
4714 auto_thaw <= 0 ||
4715 now <= deliver_frozen_at + auto_thaw
4716 )
4717 &&
4718 (!forced || !deliver_force_thaw || !admin_user ||
4719 continue_hostname != NULL
4720 ))
4721 {
4722 (void)close(deliver_datafile);
4723 deliver_datafile = -1;
4724 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
4725 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4726 }
4727
4728 /* If delivery was forced (by an admin user), assume a manual thaw.
4729 Otherwise it's an auto thaw. */
4730
4731 if (forced)
4732 {
4733 deliver_manual_thaw = TRUE;
4734 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
4735 }
4736 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
4737 }
4738
4739 /* We get here if any of the rules for unfreezing have triggered. */
4740
4741 deliver_freeze = FALSE;
4742 update_spool = TRUE;
4743 }
4744
4745
4746 /* Open the message log file if we are using them. This records details of
4747 deliveries, deferments, and failures for the benefit of the mail administrator.
4748 The log is not used by exim itself to track the progress of a message; that is
4749 done by rewriting the header spool file. */
4750
4751 if (message_logs)
4752 {
4753 uschar *error;
4754 int fd;
4755
4756 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
4757 fd = open_msglog_file(spoolname, SPOOL_MODE, &error);
4758
4759 if (fd < 0)
4760 {
4761 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
4762 spoolname, strerror(errno));
4763 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4764 }
4765
4766 /* Make a C stream out of it. */
4767
4768 message_log = fdopen(fd, "a");
4769 if (message_log == NULL)
4770 {
4771 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
4772 spoolname, strerror(errno));
4773 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4774 }
4775 }
4776
4777
4778 /* If asked to give up on a message, log who did it, and set the action for all
4779 the addresses. */
4780
4781 if (give_up)
4782 {
4783 struct passwd *pw = getpwuid(real_uid);
4784 log_write(0, LOG_MAIN, "cancelled by %s", (pw != NULL)?
4785 US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
4786 process_recipients = RECIP_FAIL;
4787 }
4788
4789 /* Otherwise, if there are too many Received: headers, fail all recipients. */
4790
4791 else if (received_count > received_headers_max)
4792 process_recipients = RECIP_FAIL_LOOP;
4793
4794 /* Otherwise, if a system-wide, address-independent message filter is
4795 specified, run it now, except in the case when we are failing all recipients as
4796 a result of timeout_frozen_after. If the system filter yields "delivered", then
4797 ignore the true recipients of the message. Failure of the filter file is
4798 logged, and the delivery attempt fails. */
4799
4800 else if (system_filter != NULL && process_recipients != RECIP_FAIL_TIMEOUT)
4801 {
4802 int rc;
4803 int filtertype;
4804 ugid_block ugid;
4805 redirect_block redirect;
4806
4807 if (system_filter_uid_set)
4808 {
4809 ugid.uid = system_filter_uid;
4810 ugid.gid = system_filter_gid;
4811 ugid.uid_set = ugid.gid_set = TRUE;
4812 }
4813 else
4814 {
4815 ugid.uid_set = ugid.gid_set = FALSE;
4816 }
4817
4818 return_path = sender_address;
4819 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
4820 system_filtering = TRUE;
4821
4822 /* Any error in the filter file causes a delivery to be abandoned. */
4823
4824 redirect.string = system_filter;
4825 redirect.isfile = TRUE;
4826 redirect.check_owner = redirect.check_group = FALSE;
4827 redirect.owners = NULL;
4828 redirect.owngroups = NULL;
4829 redirect.pw = NULL;
4830 redirect.modemask = 0;
4831
4832 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
4833
4834 rc = rda_interpret(
4835 &redirect, /* Where the data is */
4836 RDO_DEFER | /* Turn on all the enabling options */
4837 RDO_FAIL | /* Leave off all the disabling options */
4838 RDO_FILTER |
4839 RDO_FREEZE |
4840 RDO_REALLOG |
4841 RDO_REWRITE,
4842 NULL, /* No :include: restriction (not used in filter) */
4843 NULL, /* No sieve vacation directory (not sieve!) */
4844 NULL, /* No sieve enotify mailto owner (not sieve!) */
4845 NULL, /* No sieve user address (not sieve!) */
4846 NULL, /* No sieve subaddress (not sieve!) */
4847 &ugid, /* uid/gid data */
4848 &addr_new, /* Where to hang generated addresses */
4849 &filter_message, /* Where to put error message */
4850 NULL, /* Don't skip syntax errors */
4851 &filtertype, /* Will always be set to FILTER_EXIM for this call */
4852 US"system filter"); /* For error messages */
4853
4854 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
4855
4856 if (rc == FF_ERROR || rc == FF_NONEXIST)
4857 {
4858 (void)close(deliver_datafile);
4859 deliver_datafile = -1;
4860 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
4861 string_printing(filter_message));
4862 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4863 }
4864
4865 /* Reset things. If the filter message is an empty string, which can happen
4866 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
4867
4868 system_filtering = FALSE;
4869 enable_dollar_recipients = FALSE;
4870 if (filter_message != NULL && filter_message[0] == 0) filter_message = NULL;
4871
4872 /* Save the values of the system filter variables so that user filters
4873 can use them. */
4874
4875 memcpy(filter_sn, filter_n, sizeof(filter_sn));
4876
4877 /* The filter can request that delivery of the original addresses be
4878 deferred. */
4879
4880 if (rc == FF_DEFER)
4881 {
4882 process_recipients = RECIP_DEFER;
4883 deliver_msglog("Delivery deferred by system filter\n");
4884 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
4885 }
4886
4887 /* The filter can request that a message be frozen, but this does not
4888 take place if the message has been manually thawed. In that case, we must
4889 unset "delivered", which is forced by the "freeze" command to make -bF
4890 work properly. */
4891
4892 else if (rc == FF_FREEZE && !deliver_manual_thaw)
4893 {
4894 deliver_freeze = TRUE;
4895 deliver_frozen_at = time(NULL);
4896 process_recipients = RECIP_DEFER;
4897 frozen_info = string_sprintf(" by the system filter%s%s",
4898 (filter_message == NULL)? US"" : US": ",
4899 (filter_message == NULL)? US"" : filter_message);
4900 }
4901
4902 /* The filter can request that a message be failed. The error message may be
4903 quite long - it is sent back to the sender in the bounce - but we don't want
4904 to fill up the log with repetitions of it. If it starts with << then the text
4905 between << and >> is written to the log, with the rest left for the bounce
4906 message. */
4907
4908 else if (rc == FF_FAIL)
4909 {
4910 uschar *colon = US"";
4911 uschar *logmsg = US"";
4912 int loglen = 0;
4913
4914 process_recipients = RECIP_FAIL_FILTER;
4915
4916 if (filter_message != NULL)
4917 {
4918 uschar *logend;
4919 colon = US": ";
4920 if (filter_message[0] == '<' && filter_message[1] == '<' &&
4921 (logend = Ustrstr(filter_message, ">>")) != NULL)
4922 {
4923 logmsg = filter_message + 2;
4924 loglen = logend - logmsg;
4925 filter_message = logend + 2;
4926 if (filter_message[0] == 0) filter_message = NULL;
4927 }
4928 else
4929 {
4930 logmsg = filter_message;
4931 loglen = Ustrlen(filter_message);
4932 }
4933 }
4934
4935 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
4936 logmsg);
4937 }
4938
4939 /* Delivery can be restricted only to those recipients (if any) that the
4940 filter specified. */
4941
4942 else if (rc == FF_DELIVERED)
4943 {
4944 process_recipients = RECIP_IGNORE;
4945 if (addr_new == NULL)
4946 log_write(0, LOG_MAIN, "=> discarded (system filter)");
4947 else
4948 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
4949 }
4950
4951 /* If any new addresses were created by the filter, fake up a "parent"
4952 for them. This is necessary for pipes, etc., which are expected to have
4953 parents, and it also gives some sensible logging for others. Allow
4954 pipes, files, and autoreplies, and run them as the filter uid if set,
4955 otherwise as the current uid. */
4956
4957 if (addr_new != NULL)
4958 {
4959 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
4960 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
4961
4962 /* The text "system-filter" is tested in transport_set_up_command() and in
4963 set_up_shell_command() in the pipe transport, to enable them to permit
4964 $recipients, so don't change it here without also changing it there. */
4965
4966 address_item *p = addr_new;
4967 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
4968
4969 parent->domain = string_copylc(qualify_domain_recipient);
4970 parent->local_part = US"system-filter";
4971
4972 /* As part of this loop, we arrange for addr_last to end up pointing
4973 at the final address. This is used if we go on to add addresses for the
4974 original recipients. */
4975
4976 while (p != NULL)
4977 {
4978 if (parent->child_count == SHRT_MAX)
4979 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
4980 "than %d delivery addresses", SHRT_MAX);
4981 parent->child_count++;
4982 p->parent = parent;
4983
4984 if (testflag(p, af_pfr))
4985 {
4986 uschar *tpname;
4987 uschar *type;
4988 p->uid = uid;
4989 p->gid = gid;
4990 setflag(p, af_uid_set |
4991 af_gid_set |
4992 af_allow_file |
4993 af_allow_pipe |
4994 af_allow_reply);
4995
4996 /* Find the name of the system filter's appropriate pfr transport */
4997
4998 if (p->address[0] == '|')
4999 {
5000 type = US"pipe";
5001 tpname = system_filter_pipe_transport;
5002 address_pipe = p->address;
5003 }
5004 else if (p->address[0] == '>')
5005 {
5006 type = US"reply";
5007 tpname = system_filter_reply_transport;
5008 }
5009 else
5010 {
5011 if (p->address[Ustrlen(p->address)-1] == '/')
5012 {
5013 type = US"directory";
5014 tpname = system_filter_directory_transport;
5015 }
5016 else
5017 {
5018 type = US"file";
5019 tpname = system_filter_file_transport;
5020 }
5021 address_file = p->address;
5022 }
5023
5024 /* Now find the actual transport, first expanding the name. We have
5025 set address_file or address_pipe above. */
5026
5027 if (tpname != NULL)
5028 {
5029 uschar *tmp = expand_string(tpname);
5030 address_file = address_pipe = NULL;
5031 if (tmp == NULL)
5032 p->message = string_sprintf("failed to expand \"%s\" as a "
5033 "system filter transport name", tpname);
5034 tpname = tmp;
5035 }
5036 else
5037 {
5038 p->message = string_sprintf("system_filter_%s_transport is unset",
5039 type);
5040 }
5041
5042 if (tpname != NULL)
5043 {
5044 transport_instance *tp;
5045 for (tp = transports; tp != NULL; tp = tp->next)
5046 {
5047 if (Ustrcmp(tp->name, tpname) == 0)
5048 {
5049 p->transport = tp;
5050 break;
5051 }
5052 }
5053 if (tp == NULL)
5054 p->message = string_sprintf("failed to find \"%s\" transport "
5055 "for system filter delivery", tpname);
5056 }
5057
5058 /* If we couldn't set up a transport, defer the delivery, putting the
5059 error on the panic log as well as the main log. */
5060
5061 if (p->transport == NULL)
5062 {
5063 address_item *badp = p;
5064 p = p->next;
5065 if (addr_last == NULL) addr_new = p; else addr_last->next = p;
5066 badp->local_part = badp->address; /* Needed for log line */
5067 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
5068 continue;
5069 }
5070 } /* End of pfr handling */
5071
5072 /* Either a non-pfr delivery, or we found a transport */
5073
5074 DEBUG(D_deliver|D_filter)
5075 debug_printf("system filter added %s\n", p->address);
5076
5077 addr_last = p;
5078 p = p->next;
5079 } /* Loop through all addr_new addresses */
5080 }
5081 }
5082
5083
5084 /* Scan the recipients list, and for every one that is not in the non-
5085 recipients tree, add an addr item to the chain of new addresses. If the pno
5086 value is non-negative, we must set the onetime parent from it. This which
5087 points to the relevant entry in the recipients list.
5088
5089 This processing can be altered by the setting of the process_recipients
5090 variable, which is changed if recipients are to be ignored, failed, or
5091 deferred. This can happen as a result of system filter activity, or if the -Mg
5092 option is used to fail all of them.
5093
5094 Duplicate addresses are handled later by a different tree structure; we can't
5095 just extend the non-recipients tree, because that will be re-written to the
5096 spool if the message is deferred, and in any case there are casing
5097 complications for local addresses. */
5098
5099 if (process_recipients != RECIP_IGNORE)
5100 {
5101 for (i = 0; i < recipients_count; i++)
5102 {
5103 if (tree_search(tree_nonrecipients, recipients_list[i].address) == NULL)
5104 {
5105 recipient_item *r = recipients_list + i;
5106 address_item *new = deliver_make_addr(r->address, FALSE);
5107 new->p.errors_address = r->errors_to;
5108
5109 if (r->pno >= 0)
5110 new->onetime_parent = recipients_list[r->pno].address;
5111
5112 switch (process_recipients)
5113 {
5114 /* RECIP_DEFER is set when a system filter freezes a message. */
5115
5116 case RECIP_DEFER:
5117 new->next = addr_defer;
5118 addr_defer = new;
5119 break;
5120
5121
5122 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
5123 command. */
5124
5125 case RECIP_FAIL_FILTER:
5126 new->message =
5127 (filter_message == NULL)? US"delivery cancelled" : filter_message;
5128 setflag(new, af_pass_message);
5129 goto RECIP_QUEUE_FAILED; /* below */
5130
5131
5132 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
5133 than the value in timeout_frozen_after. Treat non-bounce messages
5134 similarly to -Mg; for bounce messages we just want to discard, so
5135 don't put the address on the failed list. The timeout has already
5136 been logged. */
5137
5138 case RECIP_FAIL_TIMEOUT:
5139 new->message = US"delivery cancelled; message timed out";
5140 goto RECIP_QUEUE_FAILED; /* below */
5141
5142
5143 /* RECIP_FAIL is set when -Mg has been used. */
5144
5145 case RECIP_FAIL:
5146 new->message = US"delivery cancelled by administrator";
5147 /* Fall through */
5148
5149 /* Common code for the failure cases above. If this is not a bounce
5150 message, put the address on the failed list so that it is used to
5151 create a bounce. Otherwise do nothing - this just discards the address.
5152 The incident has already been logged. */
5153
5154 RECIP_QUEUE_FAILED:
5155 if (sender_address[0] != 0)
5156 {
5157 new->next = addr_failed;
5158 addr_failed = new;
5159 }
5160 break;
5161
5162
5163 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
5164 in the message. Process each address as a routing failure; if this
5165 is a bounce message, it will get frozen. */
5166
5167 case RECIP_FAIL_LOOP:
5168 new->message = US"Too many \"Received\" headers - suspected mail loop";
5169 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5170 break;
5171
5172
5173 /* Value should be RECIP_ACCEPT; take this as the safe default. */
5174
5175 default:
5176 if (addr_new == NULL) addr_new = new; else addr_last->next = new;
5177 addr_last = new;
5178 break;
5179 }
5180 }
5181 }
5182 }
5183
5184 DEBUG(D_deliver)
5185 {
5186 address_item *p = addr_new;
5187 debug_printf("Delivery address list:\n");
5188 while (p != NULL)
5189 {
5190 debug_printf(" %s %s\n", p->address, (p->onetime_parent == NULL)? US"" :
5191 p->onetime_parent);
5192 p = p->next;
5193 }
5194 }
5195
5196 /* Set up the buffers used for copying over the file when delivering. */
5197
5198 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
5199 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
5200
5201
5202
5203 /* Until there are no more new addresses, handle each one as follows:
5204
5205 . If this is a generated address (indicated by the presence of a parent
5206 pointer) then check to see whether it is a pipe, file, or autoreply, and
5207 if so, handle it directly here. The router that produced the address will
5208 have set the allow flags into the address, and also set the uid/gid required.
5209 Having the routers generate new addresses and then checking them here at
5210 the outer level is tidier than making each router do the checking, and
5211 means that routers don't need access to the failed address queue.
5212
5213 . Break up the address into local part and domain, and make lowercased
5214 versions of these strings. We also make unquoted versions of the local part.
5215
5216 . Handle the percent hack for those domains for which it is valid.
5217
5218 . For child addresses, determine if any of the parents have the same address.
5219 If so, generate a different string for previous delivery checking. Without
5220 this code, if the address spqr generates spqr via a forward or alias file,
5221 delivery of the generated spqr stops further attempts at the top level spqr,
5222 which is not what is wanted - it may have generated other addresses.
5223
5224 . Check on the retry database to see if routing was previously deferred, but
5225 only if in a queue run. Addresses that are to be routed are put on the
5226 addr_route chain. Addresses that are to be deferred are put on the
5227 addr_defer chain. We do all the checking first, so as not to keep the
5228 retry database open any longer than necessary.
5229
5230 . Now we run the addresses through the routers. A router may put the address
5231 on either the addr_local or the addr_remote chain for local or remote
5232 delivery, respectively, or put it on the addr_failed chain if it is
5233 undeliveable, or it may generate child addresses and put them on the
5234 addr_new chain, or it may defer an address. All the chain anchors are
5235 passed as arguments so that the routers can be called for verification
5236 purposes as well.
5237
5238 . If new addresses have been generated by the routers, da capo.
5239 */
5240
5241 header_rewritten = FALSE; /* No headers rewritten yet */
5242 while (addr_new != NULL) /* Loop until all addresses dealt with */
5243 {
5244 address_item *addr, *parent;
5245 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
5246
5247 /* Failure to open the retry database is treated the same as if it does
5248 not exist. In both cases, dbm_file is NULL. */
5249
5250 if (dbm_file == NULL)
5251 {
5252 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
5253 debug_printf("no retry data available\n");
5254 }
5255
5256 /* Scan the current batch of new addresses, to handle pipes, files and
5257 autoreplies, and determine which others are ready for routing. */
5258
5259 while (addr_new != NULL)
5260 {
5261 int rc;
5262 uschar *p;
5263 tree_node *tnode;
5264 dbdata_retry *domain_retry_record;
5265 dbdata_retry *address_retry_record;
5266
5267 addr = addr_new;
5268 addr_new = addr->next;
5269
5270 DEBUG(D_deliver|D_retry|D_route)
5271 {
5272 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5273 debug_printf("Considering: %s\n", addr->address);
5274 }
5275
5276 /* Handle generated address that is a pipe or a file or an autoreply. */
5277
5278 if (testflag(addr, af_pfr))
5279 {
5280 /* If an autoreply in a filter could not generate a syntactically valid
5281 address, give up forthwith. Set af_ignore_error so that we don't try to
5282 generate a bounce. */
5283
5284 if (testflag(addr, af_bad_reply))
5285 {
5286 addr->basic_errno = ERRNO_BADADDRESS2;
5287 addr->local_part = addr->address;
5288 addr->message =
5289 US"filter autoreply generated syntactically invalid recipient";
5290 setflag(addr, af_ignore_error);
5291 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5292 continue; /* with the next new address */
5293 }
5294
5295 /* If two different users specify delivery to the same pipe or file or
5296 autoreply, there should be two different deliveries, so build a unique
5297 string that incorporates the original address, and use this for
5298 duplicate testing and recording delivery, and also for retrying. */
5299
5300 addr->unique =
5301 string_sprintf("%s:%s", addr->address, addr->parent->unique +
5302 (testflag(addr->parent, af_homonym)? 3:0));
5303
5304 addr->address_retry_key = addr->domain_retry_key =
5305 string_sprintf("T:%s", addr->unique);
5306
5307 /* If a filter file specifies two deliveries to the same pipe or file,
5308 we want to de-duplicate, but this is probably not wanted for two mail
5309 commands to the same address, where probably both should be delivered.
5310 So, we have to invent a different unique string in that case. Just
5311 keep piling '>' characters on the front. */
5312
5313 if (addr->address[0] == '>')
5314 {
5315 while (tree_search(tree_duplicates, addr->unique) != NULL)
5316 addr->unique = string_sprintf(">%s", addr->unique);
5317 }
5318
5319 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
5320 {
5321 DEBUG(D_deliver|D_route)
5322 debug_printf("%s is a duplicate address: discarded\n", addr->address);
5323 addr->dupof = tnode->data.ptr;
5324 addr->next = addr_duplicate;
5325 addr_duplicate = addr;
5326 continue;
5327 }
5328
5329 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5330
5331 /* Check for previous delivery */
5332
5333 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5334 {
5335 DEBUG(D_deliver|D_route)
5336 debug_printf("%s was previously delivered: discarded\n", addr->address);
5337 child_done(addr, tod_stamp(tod_log));
5338 continue;
5339 }
5340
5341 /* Save for checking future duplicates */
5342
5343 tree_add_duplicate(addr->unique, addr);
5344
5345 /* Set local part and domain */
5346
5347 addr->local_part = addr->address;
5348 addr->domain = addr->parent->domain;
5349
5350 /* Ensure that the delivery is permitted. */
5351
5352 if (testflag(addr, af_file))
5353 {
5354 if (!testflag(addr, af_allow_file))
5355 {
5356 addr->basic_errno = ERRNO_FORBIDFILE;
5357 addr->message = US"delivery to file forbidden";
5358 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5359 continue; /* with the next new address */
5360 }
5361 }
5362 else if (addr->address[0] == '|')
5363 {
5364 if (!testflag(addr, af_allow_pipe))
5365 {
5366 addr->basic_errno = ERRNO_FORBIDPIPE;
5367 addr->message = US"delivery to pipe forbidden";
5368 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5369 continue; /* with the next new address */
5370 }
5371 }
5372 else if (!testflag(addr, af_allow_reply))
5373 {
5374 addr->basic_errno = ERRNO_FORBIDREPLY;
5375 addr->message = US"autoreply forbidden";
5376 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5377 continue; /* with the next new address */
5378 }
5379
5380 /* If the errno field is already set to BADTRANSPORT, it indicates
5381 failure to expand a transport string, or find the associated transport,
5382 or an unset transport when one is required. Leave this test till now so
5383 that the forbid errors are given in preference. */
5384
5385 if (addr->basic_errno == ERRNO_BADTRANSPORT)
5386 {
5387 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5388 continue;
5389 }
5390
5391 /* Treat /dev/null as a special case and abandon the delivery. This
5392 avoids having to specify a uid on the transport just for this case.
5393 Arrange for the transport name to be logged as "**bypassed**". */
5394
5395 if (Ustrcmp(addr->address, "/dev/null") == 0)
5396 {
5397 uschar *save = addr->transport->name;
5398 addr->transport->name = US"**bypassed**";
5399 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
5400 addr->transport->name = save;
5401 continue; /* with the next new address */
5402 }
5403
5404 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
5405 delivery. */
5406
5407 DEBUG(D_deliver|D_route)
5408 debug_printf("queued for %s transport\n", addr->transport->name);
5409 addr->next = addr_local;
5410 addr_local = addr;
5411 continue; /* with the next new address */
5412 }
5413
5414 /* Handle normal addresses. First, split up into local part and domain,
5415 handling the %-hack if necessary. There is the possibility of a defer from
5416 a lookup in percent_hack_domains. */
5417
5418 if ((rc = deliver_split_address(addr)) == DEFER)
5419 {
5420 addr->message = US"cannot check percent_hack_domains";
5421 addr->basic_errno = ERRNO_LISTDEFER;
5422 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
5423 continue;
5424 }
5425
5426 /* Check to see if the domain is held. If so, proceed only if the
5427 delivery was forced by hand. */
5428
5429 deliver_domain = addr->domain; /* set $domain */
5430 if (!forced && hold_domains != NULL &&
5431 (rc = match_isinlist(addr->domain, &hold_domains, 0,
5432 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
5433 NULL)) != FAIL)
5434 {
5435 if (rc == DEFER)
5436 {
5437 addr->message = US"hold_domains lookup deferred";
5438 addr->basic_errno = ERRNO_LISTDEFER;
5439 }
5440 else
5441 {
5442 addr->message = US"domain is held";
5443 addr->basic_errno = ERRNO_HELD;
5444 }
5445 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
5446 continue;
5447 }
5448
5449 /* Now we can check for duplicates and previously delivered addresses. In
5450 order to do this, we have to generate a "unique" value for each address,
5451 because there may be identical actual addresses in a line of descendents.
5452 The "unique" field is initialized to the same value as the "address" field,
5453 but gets changed here to cope with identically-named descendents. */
5454
5455 for (parent = addr->parent; parent != NULL; parent = parent->parent)
5456 if (strcmpic(addr->address, parent->address) == 0) break;
5457
5458 /* If there's an ancestor with the same name, set the homonym flag. This
5459 influences how deliveries are recorded. Then add a prefix on the front of
5460 the unique address. We use \n\ where n starts at 0 and increases each time.
5461 It is unlikely to pass 9, but if it does, it may look odd but will still
5462 work. This means that siblings or cousins with the same names are treated
5463 as duplicates, which is what we want. */
5464
5465 if (parent != NULL)
5466 {
5467 setflag(addr, af_homonym);
5468 if (parent->unique[0] != '\\')
5469 addr->unique = string_sprintf("\\0\\%s", addr->address);
5470 else
5471 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
5472 addr->address);
5473 }
5474
5475 /* Ensure that the domain in the unique field is lower cased, because
5476 domains are always handled caselessly. */
5477
5478 p = Ustrrchr(addr->unique, '@');
5479 while (*p != 0) { *p = tolower(*p); p++; }
5480
5481 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5482
5483 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5484 {
5485 DEBUG(D_deliver|D_route)
5486 debug_printf("%s was previously delivered: discarded\n", addr->unique);
5487 child_done(addr, tod_stamp(tod_log));
5488 continue;
5489 }
5490
5491 /* Get the routing retry status, saving the two retry keys (with and
5492 without the local part) for subsequent use. If there is no retry record for
5493 the standard address routing retry key, we look for the same key with the
5494 sender attached, because this form is used by the smtp transport after a
5495 4xx response to RCPT when address_retry_include_sender is true. */
5496
5497 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
5498 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
5499 addr->domain);
5500
5501 if (dbm_file == NULL)
5502 domain_retry_record = address_retry_record = NULL;
5503 else
5504 {
5505 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
5506 if (domain_retry_record != NULL &&
5507 now - domain_retry_record->time_stamp > retry_data_expire)
5508 domain_retry_record = NULL; /* Ignore if too old */
5509
5510 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
5511 if (address_retry_record != NULL &&
5512 now - address_retry_record->time_stamp > retry_data_expire)
5513 address_retry_record = NULL; /* Ignore if too old */
5514
5515 if (address_retry_record == NULL)
5516 {
5517 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
5518 sender_address);
5519 address_retry_record = dbfn_read(dbm_file, altkey);
5520 if (address_retry_record != NULL &&
5521 now - address_retry_record->time_stamp > retry_data_expire)
5522 address_retry_record = NULL; /* Ignore if too old */
5523 }
5524 }
5525
5526 DEBUG(D_deliver|D_retry)
5527 {
5528 if (domain_retry_record == NULL)
5529 debug_printf("no domain retry record\n");
5530 if (address_retry_record == NULL)
5531 debug_printf("no address retry record\n");
5532 }
5533
5534 /* If we are sending a message down an existing SMTP connection, we must
5535 assume that the message which created the connection managed to route
5536 an address to that connection. We do not want to run the risk of taking
5537 a long time over routing here, because if we do, the server at the other
5538 end of the connection may time it out. This is especially true for messages
5539 with lots of addresses. For this kind of delivery, queue_running is not
5540 set, so we would normally route all addresses. We take a pragmatic approach
5541 and defer routing any addresses that have any kind of domain retry record.
5542 That is, we don't even look at their retry times. It doesn't matter if this
5543 doesn't work occasionally. This is all just an optimization, after all.
5544
5545 The reason for not doing the same for address retries is that they normally
5546 arise from 4xx responses, not DNS timeouts. */
5547
5548 if (continue_hostname != NULL && domain_retry_record != NULL)
5549 {
5550 addr->message = US"reusing SMTP connection skips previous routing defer";
5551 addr->basic_errno = ERRNO_RRETRY;
5552 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5553 }
5554
5555 /* If we are in a queue run, defer routing unless there is no retry data or
5556 we've passed the next retry time, or this message is forced. In other
5557 words, ignore retry data when not in a queue run.
5558
5559 However, if the domain retry time has expired, always allow the routing
5560 attempt. If it fails again, the address will be failed. This ensures that
5561 each address is routed at least once, even after long-term routing
5562 failures.
5563
5564 If there is an address retry, check that too; just wait for the next
5565 retry time. This helps with the case when the temporary error on the
5566 address was really message-specific rather than address specific, since
5567 it allows other messages through.
5568
5569 We also wait for the next retry time if this is a message sent down an
5570 existing SMTP connection (even though that will be forced). Otherwise there
5571 will be far too many attempts for an address that gets a 4xx error. In
5572 fact, after such an error, we should not get here because, the host should
5573 not be remembered as one this message needs. However, there was a bug that
5574 used to cause this to happen, so it is best to be on the safe side. */
5575
5576 else if (((queue_running && !deliver_force) || continue_hostname != NULL)
5577 &&
5578 ((domain_retry_record != NULL &&
5579 now < domain_retry_record->next_try &&
5580 !domain_retry_record->expired)
5581 ||
5582 (address_retry_record != NULL &&
5583 now < address_retry_record->next_try))
5584 )
5585 {
5586 addr->message = US"retry time not reached";
5587 addr->basic_errno = ERRNO_RRETRY;
5588 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5589 }
5590
5591 /* The domain is OK for routing. Remember if retry data exists so it
5592 can be cleaned up after a successful delivery. */
5593
5594 else
5595 {
5596 if (domain_retry_record != NULL || address_retry_record != NULL)
5597 setflag(addr, af_dr_retry_exists);
5598 addr->next = addr_route;
5599 addr_route = addr;
5600 DEBUG(D_deliver|D_route)
5601 debug_printf("%s: queued for routing\n", addr->address);
5602 }
5603 }
5604
5605 /* The database is closed while routing is actually happening. Requests to
5606 update it are put on a chain and all processed together at the end. */
5607
5608 if (dbm_file != NULL) dbfn_close(dbm_file);
5609
5610 /* If queue_domains is set, we don't even want to try routing addresses in
5611 those domains. During queue runs, queue_domains is forced to be unset.
5612 Optimize by skipping this pass through the addresses if nothing is set. */
5613
5614 if (!deliver_force && queue_domains != NULL)
5615 {
5616 address_item *okaddr = NULL;
5617 while (addr_route != NULL)
5618 {
5619 address_item *addr = addr_route;
5620 addr_route = addr->next;
5621
5622 deliver_domain = addr->domain; /* set $domain */
5623 if ((rc = match_isinlist(addr->domain, &queue_domains, 0,
5624 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
5625 != OK)
5626 {
5627 if (rc == DEFER)
5628 {
5629 addr->basic_errno = ERRNO_LISTDEFER;
5630 addr->message = US"queue_domains lookup deferred";
5631 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5632 }
5633 else
5634 {
5635 addr->next = okaddr;
5636 okaddr = addr;
5637 }
5638 }
5639 else
5640 {
5641 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
5642 addr->message = US"domain is in queue_domains";
5643 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5644 }
5645 }
5646
5647 addr_route = okaddr;
5648 }
5649
5650 /* Now route those addresses that are not deferred. */
5651
5652 while (addr_route != NULL)
5653 {
5654 int rc;
5655 address_item *addr = addr_route;
5656 uschar *old_domain = addr->domain;
5657 uschar *old_unique = addr->unique;
5658 addr_route = addr->next;
5659 addr->next = NULL;
5660
5661 /* Just in case some router parameter refers to it. */
5662
5663 return_path = (addr->p.errors_address != NULL)?
5664 addr->p.errors_address : sender_address;
5665
5666 /* If a router defers an address, add a retry item. Whether or not to
5667 use the local part in the key is a property of the router. */
5668
5669 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
5670 &addr_succeed, v_none)) == DEFER)
5671 retry_add_item(addr, (addr->router->retry_use_local_part)?
5672 string_sprintf("R:%s@%s", addr->local_part, addr->domain) :
5673 string_sprintf("R:%s", addr->domain), 0);
5674
5675 /* Otherwise, if there is an existing retry record in the database, add
5676 retry items to delete both forms. We must also allow for the possibility
5677 of a routing retry that includes the sender address. Since the domain might
5678 have been rewritten (expanded to fully qualified) as a result of routing,
5679 ensure that the rewritten form is also deleted. */
5680
5681 else if (testflag(addr, af_dr_retry_exists))
5682 {
5683 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
5684 sender_address);
5685 retry_add_item(addr, altkey, rf_delete);
5686 retry_add_item(addr, addr->address_retry_key, rf_delete);
5687 retry_add_item(addr, addr->domain_retry_key, rf_delete);
5688 if (Ustrcmp(addr->domain, old_domain) != 0)
5689 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
5690 }
5691
5692 /* DISCARD is given for :blackhole: and "seen finish". The event has been
5693 logged, but we need to ensure the address (and maybe parents) is marked
5694 done. */
5695
5696 if (rc == DISCARD)
5697 {
5698 address_done(addr, tod_stamp(tod_log));
5699 continue; /* route next address */
5700 }
5701
5702 /* The address is finished with (failed or deferred). */
5703
5704 if (rc != OK)
5705 {
5706 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
5707 continue; /* route next address */
5708 }
5709
5710 /* The address has been routed. If the router changed the domain, it will
5711 also have changed the unique address. We have to test whether this address
5712 has already been delivered, because it's the unique address that finally
5713 gets recorded. */
5714
5715 if (addr->unique != old_unique &&
5716 tree_search(tree_nonrecipients, addr->unique) != 0)
5717 {
5718 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
5719 "discarded\n", addr->address);
5720 if (addr_remote == addr) addr_remote = addr->next;
5721 else if (addr_local == addr) addr_local = addr->next;
5722 }
5723
5724 /* If the router has same_domain_copy_routing set, we are permitted to copy
5725 the routing for any other addresses with the same domain. This is an
5726 optimisation to save repeated DNS lookups for "standard" remote domain
5727 routing. The option is settable only on routers that generate host lists.
5728 We play it very safe, and do the optimization only if the address is routed
5729 to a remote transport, there are no header changes, and the domain was not
5730 modified by the router. */
5731
5732 if (addr_remote == addr &&
5733 addr->router->same_domain_copy_routing &&
5734 addr->p.extra_headers == NULL &&
5735 addr->p.remove_headers == NULL &&
5736 old_domain == addr->domain)
5737 {
5738 address_item **chain = &addr_route;
5739 while (*chain != NULL)
5740 {
5741 address_item *addr2 = *chain;
5742 if (Ustrcmp(addr2->domain, addr->domain) != 0)
5743 {
5744 chain = &(addr2->next);
5745 continue;
5746 }
5747
5748 /* Found a suitable address; take it off the routing list and add it to
5749 the remote delivery list. */
5750
5751 *chain = addr2->next;
5752 addr2->next = addr_remote;
5753 addr_remote = addr2;
5754
5755 /* Copy the routing data */
5756
5757 addr2->domain = addr->domain;
5758 addr2->router = addr->router;
5759 addr2->transport = addr->transport;
5760 addr2->host_list = addr->host_list;
5761 addr2->fallback_hosts = addr->fallback_hosts;
5762 addr2->p.errors_address = addr->p.errors_address;
5763 copyflag(addr2, addr, af_hide_child | af_local_host_removed);
5764
5765 DEBUG(D_deliver|D_route)
5766 {
5767 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
5768 "routing %s\n"
5769 "Routing for %s copied from %s\n",
5770 addr2->address, addr2->address, addr->address);
5771 }
5772 }
5773 }
5774 } /* Continue with routing the next address. */
5775 } /* Loop to process any child addresses that the routers created, and
5776 any rerouted addresses that got put back on the new chain. */
5777
5778
5779 /* Debugging: show the results of the routing */
5780
5781 DEBUG(D_deliver|D_retry|D_route)
5782 {
5783 address_item *p = addr_local;
5784 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5785 debug_printf("After routing:\n Local deliveries:\n");
5786 while (p != NULL)
5787 {
5788 debug_printf(" %s\n", p->address);
5789 p = p->next;
5790 }
5791
5792 p = addr_remote;
5793 debug_printf(" Remote deliveries:\n");
5794 while (p != NULL)
5795 {
5796 debug_printf(" %s\n", p->address);
5797 p = p->next;
5798 }
5799
5800 p = addr_failed;
5801 debug_printf(" Failed addresses:\n");
5802 while (p != NULL)
5803 {
5804 debug_printf(" %s\n", p->address);
5805 p = p->next;
5806 }
5807
5808 p = addr_defer;
5809 debug_printf(" Deferred addresses:\n");
5810 while (p != NULL)
5811 {
5812 debug_printf(" %s\n", p->address);
5813 p = p->next;
5814 }
5815 }
5816
5817 /* Free any resources that were cached during routing. */
5818
5819 search_tidyup();
5820 route_tidyup();
5821
5822 /* These two variables are set only during routing, after check_local_user.
5823 Ensure they are not set in transports. */
5824
5825 local_user_gid = (gid_t)(-1);
5826 local_user_uid = (uid_t)(-1);
5827
5828 /* Check for any duplicate addresses. This check is delayed until after
5829 routing, because the flexibility of the routing configuration means that
5830 identical addresses with different parentage may end up being redirected to
5831 different addresses. Checking for duplicates too early (as we previously used
5832 to) makes this kind of thing not work. */
5833
5834 do_duplicate_check(&addr_local);
5835 do_duplicate_check(&addr_remote);
5836
5837 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
5838 remote transport. The check that they all end up in one transaction happens in
5839 the do_remote_deliveries() function. */
5840
5841 if (mua_wrapper && (addr_local != NULL || addr_failed != NULL ||
5842 addr_defer != NULL))
5843 {
5844 address_item *addr;
5845 uschar *which, *colon, *msg;
5846
5847 if (addr_local != NULL)
5848 {
5849 addr = addr_local;
5850 which = US"local";
5851 }
5852 else if (addr_defer != NULL)
5853 {
5854 addr = addr_defer;
5855 which = US"deferred";
5856 }
5857 else
5858 {
5859 addr = addr_failed;
5860 which = US"failed";
5861 }
5862
5863 while (addr->parent != NULL) addr = addr->parent;
5864
5865 if (addr->message != NULL)
5866 {
5867 colon = US": ";
5868 msg = addr->message;
5869 }
5870 else colon = msg = US"";
5871
5872 /* We don't need to log here for a forced failure as it will already
5873 have been logged. Defer will also have been logged, but as a defer, so we do
5874 need to do the failure logging. */
5875
5876 if (addr != addr_failed)
5877 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
5878 addr->address, which);
5879
5880 /* Always write an error to the caller */
5881
5882 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
5883 which, colon, msg);
5884
5885 final_yield = DELIVER_MUA_FAILED;
5886 addr_failed = addr_defer = NULL; /* So that we remove the message */
5887 goto DELIVERY_TIDYUP;
5888 }
5889
5890
5891 /* If this is a run to continue deliveries to an external channel that is
5892 already set up, defer any local deliveries. */
5893
5894 if (continue_transport != NULL)
5895 {
5896 if (addr_defer == NULL) addr_defer = addr_local; else
5897 {
5898 address_item *addr = addr_defer;
5899 while (addr->next != NULL) addr = addr->next;
5900 addr->next = addr_local;
5901 }
5902 addr_local = NULL;
5903 }
5904
5905
5906 /* Because address rewriting can happen in the routers, we should not really do
5907 ANY deliveries until all addresses have been routed, so that all recipients of
5908 the message get the same headers. However, this is in practice not always
5909 possible, since sometimes remote addresses give DNS timeouts for days on end.
5910 The pragmatic approach is to deliver what we can now, saving any rewritten
5911 headers so that at least the next lot of recipients benefit from the rewriting
5912 that has already been done.
5913
5914 If any headers have been rewritten during routing, update the spool file to
5915 remember them for all subsequent deliveries. This can be delayed till later if
5916 there is only address to be delivered - if it succeeds the spool write need not
5917 happen. */
5918
5919 if (header_rewritten &&
5920 ((addr_local != NULL &&
5921 (addr_local->next != NULL || addr_remote != NULL)) ||
5922 (addr_remote != NULL && addr_remote->next != NULL)))
5923 {
5924 /* Panic-dies on error */
5925 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5926 header_rewritten = FALSE;
5927 }
5928
5929
5930 /* If there are any deliveries to be done, open the journal file. This is used
5931 to record successful deliveries as soon as possible after each delivery is
5932 known to be complete. A file opened with O_APPEND is used so that several
5933 processes can run simultaneously.
5934
5935 The journal is just insurance against crashes. When the spool file is
5936 ultimately updated at the end of processing, the journal is deleted. If a
5937 journal is found to exist at the start of delivery, the addresses listed
5938 therein are added to the non-recipients. */
5939
5940 if (addr_local != NULL || addr_remote != NULL)
5941 {
5942 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
5943 journal_fd = Uopen(spoolname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE);
5944
5945 if (journal_fd < 0)
5946 {
5947 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
5948 spoolname, strerror(errno));
5949 return DELIVER_NOT_ATTEMPTED;
5950 }
5951
5952 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
5953 that the mode is correct - the group setting doesn't always seem to get
5954 set automatically. */
5955
5956 (void)fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC);
5957 (void)fchown(journal_fd, exim_uid, exim_gid);
5958 (void)fchmod(journal_fd, SPOOL_MODE);
5959 }
5960
5961
5962 /* Now we can get down to the business of actually doing deliveries. Local
5963 deliveries are done first, then remote ones. If ever the problems of how to
5964 handle fallback transports are figured out, this section can be put into a loop
5965 for handling fallbacks, though the uid switching will have to be revised. */
5966
5967 /* Precompile a regex that is used to recognize a parameter in response
5968 to an LHLO command, if is isn't already compiled. This may be used on both
5969 local and remote LMTP deliveries. */
5970
5971 if (regex_IGNOREQUOTA == NULL) regex_IGNOREQUOTA =
5972 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
5973
5974 /* Handle local deliveries */
5975
5976 if (addr_local != NULL)
5977 {
5978 DEBUG(D_deliver|D_transport)
5979 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
5980 do_local_deliveries();
5981 disable_logging = FALSE;
5982 }
5983
5984 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
5985 so just queue them all. */
5986
5987 if (queue_run_local)
5988 {
5989 while (addr_remote != NULL)
5990 {
5991 address_item *addr = addr_remote;
5992 addr_remote = addr->next;
5993 addr->next = NULL;
5994 addr->basic_errno = ERRNO_LOCAL_ONLY;
5995 addr->message = US"remote deliveries suppressed";
5996 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
5997 }
5998 }
5999
6000 /* Handle remote deliveries */
6001
6002 if (addr_remote != NULL)
6003 {
6004 DEBUG(D_deliver|D_transport)
6005 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
6006
6007 /* Precompile some regex that are used to recognize parameters in response
6008 to an EHLO command, if they aren't already compiled. */
6009
6010 if (regex_PIPELINING == NULL) regex_PIPELINING =
6011 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
6012
6013 if (regex_SIZE == NULL) regex_SIZE =
6014 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
6015
6016 if (regex_AUTH == NULL) regex_AUTH =
6017 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
6018 FALSE, TRUE);
6019
6020 #ifdef SUPPORT_TLS
6021 if (regex_STARTTLS == NULL) regex_STARTTLS =
6022 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
6023 #endif
6024
6025 /* Now sort the addresses if required, and do the deliveries. The yield of
6026 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
6027 cannot be delivered in one transaction. */
6028
6029 if (remote_sort_domains != NULL) sort_remote_deliveries();
6030 if (!do_remote_deliveries(FALSE))
6031 {
6032 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
6033 "be delivered in one transaction");
6034 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
6035
6036 final_yield = DELIVER_MUA_FAILED;
6037 addr_failed = addr_defer = NULL; /* So that we remove the message */
6038 goto DELIVERY_TIDYUP;
6039 }
6040
6041 /* See if any of the addresses that failed got put on the queue for delivery
6042 to their fallback hosts. We do it this way because often the same fallback
6043 host is used for many domains, so all can be sent in a single transaction
6044 (if appropriately configured). */
6045
6046 if (addr_fallback != NULL && !mua_wrapper)
6047 {
6048 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
6049 addr_remote = addr_fallback;
6050 addr_fallback = NULL;
6051 if (remote_sort_domains != NULL) sort_remote_deliveries();
6052 do_remote_deliveries(TRUE);
6053 }
6054 disable_logging = FALSE;
6055 }
6056
6057
6058 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6059 phase, to minimize cases of half-done things. */
6060
6061 DEBUG(D_deliver)
6062 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6063
6064 /* Root privilege is no longer needed */
6065
6066 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
6067
6068 set_process_info("tidying up after delivering %s", message_id);
6069 signal(SIGTERM, SIG_IGN);
6070
6071 /* When we are acting as an MUA wrapper, the smtp transport will either have
6072 succeeded for all addresses, or failed them all in normal cases. However, there
6073 are some setup situations (e.g. when a named port does not exist) that cause an
6074 immediate exit with deferral of all addresses. Convert those into failures. We
6075 do not ever want to retry, nor do we want to send a bounce message. */
6076
6077 if (mua_wrapper)
6078 {
6079 if (addr_defer != NULL)
6080 {
6081 address_item *addr, *nextaddr;
6082 for (addr = addr_defer; addr != NULL; addr = nextaddr)
6083 {
6084 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
6085 "delivery", addr->address);
6086 nextaddr = addr->next;
6087 addr->next = addr_failed;
6088 addr_failed = addr;
6089 }
6090 addr_defer = NULL;
6091 }
6092
6093 /* Now all should either have succeeded or failed. */
6094
6095 if (addr_failed == NULL) final_yield = DELIVER_MUA_SUCCEEDED; else
6096 {
6097 uschar *s = (addr_failed->user_message != NULL)?
6098 addr_failed->user_message : addr_failed->message;
6099
6100 fprintf(stderr, "Delivery failed: ");
6101 if (addr_failed->basic_errno > 0)
6102 {
6103 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
6104 if (s != NULL) fprintf(stderr, ": ");
6105 }
6106 if (s == NULL)
6107 {
6108 if (addr_failed->basic_errno <= 0) fprintf(stderr, "unknown error");
6109 }
6110 else fprintf(stderr, "%s", CS s);
6111 fprintf(stderr, "\n");
6112
6113 final_yield = DELIVER_MUA_FAILED;
6114 addr_failed = NULL;
6115 }
6116 }
6117
6118 /* In a normal configuration, we now update the retry database. This is done in
6119 one fell swoop at the end in order not to keep opening and closing (and
6120 locking) the database. The code for handling retries is hived off into a
6121 separate module for convenience. We pass it the addresses of the various
6122 chains, because deferred addresses can get moved onto the failed chain if the
6123 retry cutoff time has expired for all alternative destinations. Bypass the
6124 updating of the database if the -N flag is set, which is a debugging thing that
6125 prevents actual delivery. */
6126
6127 else if (!dont_deliver) retry_update(&addr_defer, &addr_failed, &addr_succeed);
6128
6129 /* If any addresses failed, we must send a message to somebody, unless
6130 af_ignore_error is set, in which case no action is taken. It is possible for
6131 several messages to get sent if there are addresses with different
6132 requirements. */
6133
6134 while (addr_failed != NULL)
6135 {
6136 pid_t pid;
6137 int fd;
6138 uschar *logtod = tod_stamp(tod_log);
6139 address_item *addr;
6140 address_item *handled_addr = NULL;
6141 address_item **paddr;
6142 address_item *msgchain = NULL;
6143 address_item **pmsgchain = &msgchain;
6144
6145 /* There are weird cases when logging is disabled in the transport. However,
6146 there may not be a transport (address failed by a router). */
6147
6148 disable_logging = FALSE;
6149 if (addr_failed->transport != NULL)
6150 disable_logging = addr_failed->transport->disable_logging;
6151
6152 DEBUG(D_deliver)
6153 debug_printf("processing failed address %s\n", addr_failed->address);
6154
6155 /* There are only two ways an address in a bounce message can get here:
6156
6157 (1) When delivery was initially deferred, but has now timed out (in the call
6158 to retry_update() above). We can detect this by testing for
6159 af_retry_timedout. If the address does not have its own errors address,
6160 we arrange to ignore the error.
6161
6162 (2) If delivery failures for bounce messages are being ignored. We can detect
6163 this by testing for af_ignore_error. This will also be set if a bounce
6164 message has been autothawed and the ignore_bounce_errors_after time has
6165 passed. It might also be set if a router was explicitly configured to
6166 ignore errors (errors_to = "").
6167
6168 If neither of these cases obtains, something has gone wrong. Log the
6169 incident, but then ignore the error. */
6170
6171 if (sender_address[0] == 0 && addr_failed->p.errors_address == NULL)
6172 {
6173 if (!testflag(addr_failed, af_retry_timedout) &&
6174 !testflag(addr_failed, af_ignore_error))
6175 {
6176 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
6177 "failure is neither frozen nor ignored (it's been ignored)");
6178 }
6179 setflag(addr_failed, af_ignore_error);
6180 }
6181
6182 /* If the first address on the list has af_ignore_error set, just remove
6183 it from the list, throw away any saved message file, log it, and
6184 mark the recipient done. */
6185
6186 if (testflag(addr_failed, af_ignore_error))
6187 {
6188 addr = addr_failed;
6189 addr_failed = addr->next;
6190 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
6191
6192 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
6193 addr->address,
6194 (addr->parent == NULL)? US"" : US" <",
6195 (addr->parent == NULL)? US"" : addr->parent->address,
6196 (addr->parent == NULL)? US"" : US">");
6197
6198 address_done(addr, logtod);
6199 child_done(addr, logtod);
6200 /* Panic-dies on error */
6201 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6202 }
6203
6204 /* Otherwise, handle the sending of a message. Find the error address for
6205 the first address, then send a message that includes all failed addresses
6206 that have the same error address. Note the bounce_recipient is a global so
6207 that it can be accesssed by $bounce_recipient while creating a customized
6208 error message. */
6209
6210 else
6211 {
6212 bounce_recipient = (addr_failed->p.errors_address == NULL)?
6213 sender_address : addr_failed->p.errors_address;
6214
6215 /* Make a subprocess to send a message */
6216
6217 pid = child_open_exim(&fd);
6218
6219 /* Creation of child failed */
6220
6221 if (pid < 0)
6222 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6223 "create child process to send failure message: %s", getpid(),
6224 getppid(), strerror(errno));
6225
6226 /* Creation of child succeeded */
6227
6228 else
6229 {
6230 int ch, rc;
6231 int filecount = 0;
6232 int rcount = 0;
6233 uschar *bcc, *emf_text;
6234 FILE *f = fdopen(fd, "wb");
6235 FILE *emf = NULL;
6236 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
6237 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
6238 DELIVER_IN_BUFFER_SIZE;
6239
6240 DEBUG(D_deliver)
6241 debug_printf("sending error message to: %s\n", bounce_recipient);
6242
6243 /* Scan the addresses for all that have the same errors address, removing
6244 them from the addr_failed chain, and putting them on msgchain. */
6245
6246 paddr = &addr_failed;
6247 for (addr = addr_failed; addr != NULL; addr = *paddr)
6248 {
6249 if (Ustrcmp(bounce_recipient, (addr->p.errors_address == NULL)?
6250 sender_address : addr->p.errors_address) != 0)
6251 {
6252 paddr = &(addr->next); /* Not the same; skip */
6253 }
6254 else /* The same - dechain */
6255 {
6256 *paddr = addr->next;
6257 *pmsgchain = addr;
6258 addr->next = NULL;
6259 pmsgchain = &(addr->next);
6260 }
6261 }
6262
6263 /* Include X-Failed-Recipients: for automatic interpretation, but do
6264 not let any one header line get too long. We do this by starting a
6265 new header every 50 recipients. Omit any addresses for which the
6266 "hide_child" flag is set. */
6267
6268 for (addr = msgchain; addr != NULL; addr = addr->next)
6269 {
6270 if (testflag(addr, af_hide_child)) continue;
6271 if (rcount >= 50)
6272 {
6273 fprintf(f, "\n");
6274 rcount = 0;
6275 }
6276 fprintf(f, "%s%s",
6277 (rcount++ == 0)? "X-Failed-Recipients: " : ",\n ",
6278 (testflag(addr, af_pfr) && addr->parent != NULL)?
6279 string_printing(addr->parent->address) :
6280 string_printing(addr->address));
6281 }
6282 if (rcount > 0) fprintf(f, "\n");
6283
6284 /* Output the standard headers */
6285
6286 if (errors_reply_to != NULL)
6287 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6288 fprintf(f, "Auto-Submitted: auto-replied\n");
6289 moan_write_from(f);
6290 fprintf(f, "To: %s\n", bounce_recipient);
6291
6292 /* Open a template file if one is provided. Log failure to open, but
6293 carry on - default texts will be used. */
6294
6295 if (bounce_message_file != NULL)
6296 {
6297 emf = Ufopen(bounce_message_file, "rb");
6298 if (emf == NULL)
6299 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
6300 "message texts: %s", bounce_message_file, strerror(errno));
6301 }
6302
6303 /* Quietly copy to configured additional addresses if required. */
6304
6305 bcc = moan_check_errorcopy(bounce_recipient);
6306 if (bcc != NULL) fprintf(f, "Bcc: %s\n", bcc);
6307
6308 /* The texts for the message can be read from a template file; if there
6309 isn't one, or if it is too short, built-in texts are used. The first
6310 emf text is a Subject: and any other headers. */
6311
6312 emf_text = next_emf(emf, US"header");
6313 if (emf_text != NULL) fprintf(f, "%s\n", emf_text); else
6314 {
6315 fprintf(f, "Subject: Mail delivery failed%s\n\n",
6316 to_sender? ": returning message to sender" : "");
6317 }
6318
6319 emf_text = next_emf(emf, US"intro");
6320 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6321 {
6322 fprintf(f,
6323 /* This message has been reworded several times. It seems to be confusing to
6324 somebody, however it is worded. I have retreated to the original, simple
6325 wording. */
6326 "This message was created automatically by mail delivery software.\n");
6327 if (bounce_message_text != NULL) fprintf(f, "%s", CS bounce_message_text);
6328 if (to_sender)
6329 {
6330 fprintf(f,
6331 "\nA message that you sent could not be delivered to one or more of its\n"
6332 "recipients. This is a permanent error. The following address(es) failed:\n");
6333 }
6334 else
6335 {
6336 fprintf(f,
6337 "\nA message sent by\n\n <%s>\n\n"
6338 "could not be delivered to one or more of its recipients. The following\n"
6339 "address(es) failed:\n", sender_address);
6340 }
6341 }
6342 fprintf(f, "\n");
6343
6344 /* Process the addresses, leaving them on the msgchain if they have a
6345 file name for a return message. (There has already been a check in
6346 post_process_one() for the existence of data in the message file.) A TRUE
6347 return from print_address_information() means that the address is not
6348 hidden. */
6349
6350 paddr = &msgchain;
6351 for (addr = msgchain; addr != NULL; addr = *paddr)
6352 {
6353 if (print_address_information(addr, f, US" ", US"\n ", US""))
6354 print_address_error(addr, f, US"");
6355
6356 /* End the final line for the address */
6357
6358 fputc('\n', f);
6359
6360 /* Leave on msgchain if there's a return file. */
6361
6362 if (addr->return_file >= 0)
6363 {
6364 paddr = &(addr->next);
6365 filecount++;
6366 }
6367
6368 /* Else save so that we can tick off the recipient when the
6369 message is sent. */
6370
6371 else
6372 {
6373 *paddr = addr->next;
6374 addr->next = handled_addr;
6375 handled_addr = addr;
6376 }
6377 }
6378
6379 fprintf(f, "\n");
6380
6381 /* Get the next text, whether we need it or not, so as to be
6382 positioned for the one after. */
6383
6384 emf_text = next_emf(emf, US"generated text");
6385
6386 /* If there were any file messages passed by the local transports,
6387 include them in the message. Then put the address on the handled chain.
6388 In the case of a batch of addresses that were all sent to the same
6389 transport, the return_file field in all of them will contain the same
6390 fd, and the return_filename field in the *last* one will be set (to the
6391 name of the file). */
6392
6393 if (msgchain != NULL)
6394 {
6395 address_item *nextaddr;
6396
6397 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6398 fprintf(f,
6399 "The following text was generated during the delivery "
6400 "attempt%s:\n", (filecount > 1)? "s" : "");
6401
6402 for (addr = msgchain; addr != NULL; addr = nextaddr)
6403 {
6404 FILE *fm;
6405 address_item *topaddr = addr;
6406
6407 /* List all the addresses that relate to this file */
6408
6409 fprintf(f, "\n");
6410 while(addr != NULL) /* Insurance */
6411 {
6412 print_address_information(addr, f, US"------ ", US"\n ",
6413 US" ------\n");
6414 if (addr->return_filename != NULL) break;
6415 addr = addr->next;
6416 }
6417 fprintf(f, "\n");
6418
6419 /* Now copy the file */
6420
6421 fm = Ufopen(addr->return_filename, "rb");
6422
6423 if (fm == NULL)
6424 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
6425 strerror(errno));
6426 else
6427 {
6428 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
6429 (void)fclose(fm);
6430 }
6431 Uunlink(addr->return_filename);
6432
6433 /* Can now add to handled chain, first fishing off the next
6434 address on the msgchain. */
6435
6436 nextaddr = addr->next;
6437 addr->next = handled_addr;
6438 handled_addr = topaddr;
6439 }
6440 fprintf(f, "\n");
6441 }
6442
6443 /* Now copy the message, trying to give an intelligible comment if
6444 it is too long for it all to be copied. The limit isn't strictly
6445 applied because of the buffering. There is, however, an option
6446 to suppress copying altogether. */
6447
6448 emf_text = next_emf(emf, US"copy");
6449
6450 if (bounce_return_message)
6451 {
6452 int topt = topt_add_return_path;
6453 if (!bounce_return_body) topt |= topt_no_body;
6454
6455 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6456 {
6457 if (bounce_return_body) fprintf(f,
6458 "------ This is a copy of the message, including all the headers. ------\n");
6459 else fprintf(f,
6460 "------ This is a copy of the message's headers. ------\n");
6461 }
6462
6463 /* While reading the "truncated" message, set return_size_limit to
6464 the actual max testing value, rounded. We need to read the message
6465 whether we are going to use it or not. */
6466
6467 {
6468 int temp = bounce_return_size_limit;
6469 bounce_return_size_limit = (max/1000)*1000;
6470 emf_text = next_emf(emf, US"truncated");
6471 bounce_return_size_limit = temp;
6472 }
6473
6474 if (bounce_return_body && bounce_return_size_limit > 0)
6475 {
6476 struct stat statbuf;
6477 if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max)
6478 {
6479 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6480 {
6481 fprintf(f,
6482 "------ The body of the message is " OFF_T_FMT " characters long; only the first\n"
6483 "------ %d or so are included here.\n", statbuf.st_size, max);
6484 }
6485 }
6486 }
6487
6488 fprintf(f, "\n");
6489 fflush(f);
6490 transport_filter_argv = NULL; /* Just in case */
6491 return_path = sender_address; /* In case not previously set */
6492 transport_write_message(NULL, fileno(f), topt,
6493 bounce_return_size_limit, NULL, NULL, NULL, NULL, NULL, 0);
6494 }
6495
6496 /* Write final text and close the template file if one is open */
6497
6498 if (emf != NULL)
6499 {
6500 emf_text = next_emf(emf, US"final");
6501 if (emf_text != NULL) fprintf(f, "%s", CS emf_text);
6502 (void)fclose(emf);
6503 }
6504
6505 /* Close the file, which should send an EOF to the child process
6506 that is receiving the message. Wait for it to finish. */
6507
6508 (void)fclose(f);
6509 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
6510
6511 /* In the test harness, let the child do it's thing first. */
6512
6513 if (running_in_test_harness) millisleep(500);
6514
6515 /* If the process failed, there was some disaster in setting up the
6516 error message. Unless the message is very old, ensure that addr_defer
6517 is non-null, which will have the effect of leaving the message on the
6518 spool. The failed addresses will get tried again next time. However, we
6519 don't really want this to happen too often, so freeze the message unless
6520 there are some genuine deferred addresses to try. To do this we have
6521 to call spool_write_header() here, because with no genuine deferred
6522 addresses the normal code below doesn't get run. */
6523
6524 if (rc != 0)
6525 {
6526 uschar *s = US"";
6527 if (now - received_time < retry_maximum_timeout && addr_defer == NULL)
6528 {
6529 addr_defer = (address_item *)(+1);
6530 deliver_freeze = TRUE;
6531 deliver_frozen_at = time(NULL);
6532 /* Panic-dies on error */
6533 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6534 s = US" (frozen)";
6535 }
6536 deliver_msglog("Process failed (%d) when writing error message "
6537 "to %s%s", rc, bounce_recipient, s);
6538 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
6539 "to %s%s", rc, bounce_recipient, s);
6540 }
6541
6542 /* The message succeeded. Ensure that the recipients that failed are
6543 now marked finished with on the spool and their parents updated. */
6544
6545 else
6546 {
6547 for (addr = handled_addr; addr != NULL; addr = addr->next)
6548 {
6549 address_done(addr, logtod);
6550 child_done(addr, logtod);
6551 }
6552 /* Panic-dies on error */
6553 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6554 }
6555 }
6556 }
6557 }
6558
6559 disable_logging = FALSE; /* In case left set */
6560
6561 /* Come here from the mua_wrapper case if routing goes wrong */
6562
6563 DELIVERY_TIDYUP:
6564
6565 /* If there are now no deferred addresses, we are done. Preserve the
6566 message log if so configured, and we are using them. Otherwise, sling it.
6567 Then delete the message itself. */
6568
6569 if (addr_defer == NULL)
6570 {
6571 if (message_logs)
6572 {
6573 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir,
6574 id);
6575 if (preserve_message_logs)
6576 {
6577 int rc;
6578 sprintf(CS big_buffer, "%s/msglog.OLD/%s", spool_directory, id);
6579 if ((rc = Urename(spoolname, big_buffer)) < 0)
6580 {
6581 (void)directory_make(spool_directory, US"msglog.OLD",
6582 MSGLOG_DIRECTORY_MODE, TRUE);
6583 rc = Urename(spoolname, big_buffer);
6584 }
6585 if (rc < 0)
6586 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
6587 "msglog.OLD directory", spoolname);
6588 }
6589 else
6590 {
6591 if (Uunlink(spoolname) < 0)
6592 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6593 spoolname, strerror(errno));
6594 }
6595 }
6596
6597 /* Remove the two message files. */
6598
6599 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
6600 if (Uunlink(spoolname) < 0)
6601 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6602 spoolname, strerror(errno));
6603 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
6604 if (Uunlink(spoolname) < 0)
6605 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6606 spoolname, strerror(errno));
6607
6608 /* Log the end of this message, with queue time if requested. */
6609
6610 if ((log_extra_selector & LX_queue_time_overall) != 0)
6611 log_write(0, LOG_MAIN, "Completed QT=%s",
6612 readconf_printtime(time(NULL) - received_time));
6613 else
6614 log_write(0, LOG_MAIN, "Completed");
6615
6616 /* Unset deliver_freeze so that we won't try to move the spool files further down */
6617 deliver_freeze = FALSE;
6618 }
6619
6620 /* If there are deferred addresses, we are keeping this message because it is
6621 not yet completed. Lose any temporary files that were catching output from
6622 pipes for any of the deferred addresses, handle one-time aliases, and see if
6623 the message has been on the queue for so long that it is time to send a warning
6624 message to the sender, unless it is a mailer-daemon. If all deferred addresses
6625 have the same domain, we can set deliver_domain for the expansion of
6626 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
6627 the parent's domain.
6628
6629 If all the deferred addresses have an error number that indicates "retry time
6630 not reached", skip sending the warning message, because it won't contain the
6631 reason for the delay. It will get sent at the next real delivery attempt.
6632 However, if at least one address has tried, we'd better include all of them in
6633 the message.
6634
6635 If we can't make a process to send the message, don't worry.
6636
6637 For mailing list expansions we want to send the warning message to the
6638 mailing list manager. We can't do a perfect job here, as some addresses may
6639 have different errors addresses, but if we take the errors address from
6640 each deferred address it will probably be right in most cases.
6641
6642 If addr_defer == +1, it means there was a problem sending an error message
6643 for failed addresses, and there were no "real" deferred addresses. The value
6644 was set just to keep the message on the spool, so there is nothing to do here.
6645 */
6646
6647 else if (addr_defer != (address_item *)(+1))
6648 {
6649 address_item *addr;
6650 uschar *recipients = US"";
6651 BOOL delivery_attempted = FALSE;
6652
6653 deliver_domain = testflag(addr_defer, af_pfr)?
6654 addr_defer->parent->domain : addr_defer->domain;
6655
6656 for (addr = addr_defer; addr != NULL; addr = addr->next)
6657 {
6658 address_item *otaddr;
6659
6660 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
6661
6662 if (deliver_domain != NULL)
6663 {
6664 uschar *d = (testflag(addr, af_pfr))? addr->parent->domain : addr->domain;
6665
6666 /* The domain may be unset for an address that has never been routed
6667 because the system filter froze the message. */
6668
6669 if (d == NULL || Ustrcmp(d, deliver_domain) != 0) deliver_domain = NULL;
6670 }
6671
6672 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
6673
6674 /* Handle the case of one-time aliases. If any address in the ancestry
6675 of this one is flagged, ensure it is in the recipients list, suitably
6676 flagged, and that its parent is marked delivered. */
6677
6678 for (otaddr = addr; otaddr != NULL; otaddr = otaddr->parent)
6679 if (otaddr->onetime_parent != NULL) break;
6680
6681 if (otaddr != NULL)
6682 {
6683 int i;
6684 int t = recipients_count;
6685
6686 for (i = 0; i < recipients_count; i++)
6687 {
6688 uschar *r = recipients_list[i].address;
6689 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
6690 if (Ustrcmp(otaddr->address, r) == 0) break;
6691 }
6692
6693 /* Didn't find the address already in the list, and did find the
6694 ultimate parent's address in the list. After adding the recipient,
6695 update the errors address in the recipients list. */
6696
6697 if (i >= recipients_count && t < recipients_count)
6698 {
6699 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
6700 otaddr->address, otaddr->parent->address);
6701 receive_add_recipient(otaddr->address, t);
6702 recipients_list[recipients_count-1].errors_to = otaddr->p.errors_address;
6703 tree_add_nonrecipient(otaddr->parent->address);
6704 update_spool = TRUE;
6705 }
6706 }
6707
6708 /* Except for error messages, ensure that either the errors address for
6709 this deferred address or, if there is none, the sender address, is on the
6710 list of recipients for a warning message. */
6711
6712 if (sender_address[0] != 0)
6713 {
6714 if (addr->p.errors_address == NULL)
6715 {
6716 if (Ustrstr(recipients, sender_address) == NULL)
6717 recipients = string_sprintf("%s%s%s", recipients,
6718 (recipients[0] == 0)? "" : ",", sender_address);
6719 }
6720 else
6721 {
6722 if (Ustrstr(recipients, addr->p.errors_address) == NULL)
6723 recipients = string_sprintf("%s%s%s", recipients,
6724 (recipients[0] == 0)? "" : ",", addr->p.errors_address);
6725 }
6726 }
6727 }
6728
6729 /* Send a warning message if the conditions are right. If the condition check
6730 fails because of a lookup defer, there is nothing we can do. The warning
6731 is not sent. Another attempt will be made at the next delivery attempt (if
6732 it also defers). */
6733
6734 if (!queue_2stage && delivery_attempted &&
6735 delay_warning[1] > 0 && sender_address[0] != 0 &&
6736 (delay_warning_condition == NULL ||
6737 expand_check_condition(delay_warning_condition,
6738 US"delay_warning", US"option")))
6739 {
6740 int count;
6741 int show_time;
6742 int queue_time = time(NULL) - received_time;
6743
6744 /* When running in the test harness, there's an option that allows us to
6745 fudge this time so as to get repeatability of the tests. Take the first
6746 time off the list. In queue runs, the list pointer gets updated in the
6747 calling process. */
6748
6749 if (running_in_test_harness && fudged_queue_times[0] != 0)
6750 {
6751 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
6752 if (qt >= 0)
6753 {
6754 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
6755 fudged_queue_times);
6756 queue_time = qt;
6757 }
6758 }
6759
6760 /* See how many warnings we should have sent by now */
6761
6762 for (count = 0; count < delay_warning[1]; count++)
6763 if (queue_time < delay_warning[count+2]) break;
6764
6765 show_time = delay_warning[count+1];
6766
6767 if (count >= delay_warning[1])
6768 {
6769 int extra;
6770 int last_gap = show_time;
6771 if (count > 1) last_gap -= delay_warning[count];
6772 extra = (queue_time - delay_warning[count+1])/last_gap;
6773 show_time += last_gap * extra;
6774 count += extra;
6775 }
6776
6777 DEBUG(D_deliver)
6778 {
6779 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
6780 debug_printf("warning counts: required %d done %d\n", count,
6781 warning_count);
6782 }
6783
6784 /* We have computed the number of warnings there should have been by now.
6785 If there haven't been enough, send one, and up the count to what it should
6786 have been. */
6787
6788 if (warning_count < count)
6789 {
6790 header_line *h;
6791 int fd;
6792 pid_t pid = child_open_exim(&fd);
6793
6794 if (pid > 0)
6795 {
6796 uschar *wmf_text;
6797 FILE *wmf = NULL;
6798 FILE *f = fdopen(fd, "wb");
6799
6800 if (warn_message_file != NULL)
6801 {
6802 wmf = Ufopen(warn_message_file, "rb");
6803 if (wmf == NULL)
6804 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
6805 "message texts: %s", warn_message_file, strerror(errno));
6806 }
6807
6808 warnmsg_recipients = recipients;
6809 warnmsg_delay = (queue_time < 120*60)?
6810 string_sprintf("%d minutes", show_time/60):
6811 string_sprintf("%d hours", show_time/3600);
6812
6813 if (errors_reply_to != NULL)
6814 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6815 fprintf(f, "Auto-Submitted: auto-replied\n");
6816 moan_write_from(f);
6817 fprintf(f, "To: %s\n", recipients);
6818
6819 wmf_text = next_emf(wmf, US"header");
6820 if (wmf_text != NULL)
6821 fprintf(f, "%s\n", wmf_text);
6822 else
6823 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
6824 message_id, warnmsg_delay);
6825
6826 wmf_text = next_emf(wmf, US"intro");
6827 if (wmf_text != NULL) fprintf(f, "%s", CS wmf_text); else
6828 {
6829 fprintf(f,
6830 "This message was created automatically by mail delivery software.\n");
6831
6832 if (Ustrcmp(recipients, sender_address) == 0)
6833 fprintf(f,
6834 "A message that you sent has not yet been delivered to one or more of its\n"
6835 "recipients after more than ");
6836
6837 else fprintf(f,
6838 "A message sent by\n\n <%s>\n\n"
6839 "has not yet been delivered to one or more of its recipients after more than \n",
6840 sender_address);
6841
6842 fprintf(f, "%s on the queue on %s.\n\n", warnmsg_delay,
6843 primary_hostname);
6844 fprintf(f, "The message identifier is: %s\n", message_id);
6845
6846 for (h = header_list; h != NULL; h = h->next)
6847 {
6848 if (strncmpic(h->text, US"Subject:", 8) == 0)
6849 fprintf(f, "The subject of the message is: %s", h->text + 9);
6850 else if (strncmpic(h->text, US"Date:", 5) == 0)
6851 fprintf(f, "The date of the message is: %s", h->text + 6);
6852 }
6853 fprintf(f, "\n");
6854
6855 fprintf(f, "The address%s to which the message has not yet been "
6856 "delivered %s:\n",
6857 (addr_defer->next == NULL)? "" : "es",
6858 (addr_defer->next == NULL)? "is": "are");
6859 }
6860
6861 /* List the addresses, with error information if allowed */
6862
6863 fprintf(f, "\n");
6864 while (addr_defer != NULL)
6865 {
6866 address_item *addr = addr_defer;
6867 addr_defer = addr->next;
6868 if (print_address_information(addr, f, US" ", US"\n ", US""))
6869 print_address_error(addr, f, US"Delay reason: ");
6870 fprintf(f, "\n");
6871 }
6872 fprintf(f, "\n");
6873
6874 /* Final text */
6875
6876 if (wmf != NULL)
6877 {
6878 wmf_text = next_emf(wmf, US"final");
6879 if (wmf_text != NULL) fprintf(f, "%s", CS wmf_text);
6880 (void)fclose(wmf);
6881 }
6882 else
6883 {
6884 fprintf(f,
6885 "No action is required on your part. Delivery attempts will continue for\n"
6886 "some time, and this warning may be repeated at intervals if the message\n"
6887 "remains undelivered. Eventually the mail delivery software will give up,\n"
6888 "and when that happens, the message will be returned to you.\n");
6889 }
6890
6891 /* Close and wait for child process to complete, without a timeout.
6892 If there's an error, don't update the count. */
6893
6894 (void)fclose(f);
6895 if (child_close(pid, 0) == 0)
6896 {
6897 warning_count = count;
6898 update_spool = TRUE; /* Ensure spool rewritten */
6899 }
6900 }
6901 }
6902 }
6903
6904 /* Clear deliver_domain */
6905
6906 deliver_domain = NULL;
6907
6908 /* If this was a first delivery attempt, unset the first time flag, and
6909 ensure that the spool gets updated. */
6910
6911 if (deliver_firsttime)
6912 {
6913 deliver_firsttime = FALSE;
6914 update_spool = TRUE;
6915 }
6916
6917 /* If delivery was frozen and freeze_tell is set, generate an appropriate
6918 message, unless the message is a local error message (to avoid loops). Then
6919 log the freezing. If the text in "frozen_info" came from a system filter,
6920 it has been escaped into printing characters so as not to mess up log lines.
6921 For the "tell" message, we turn \n back into newline. Also, insert a newline
6922 near the start instead of the ": " string. */
6923
6924 if (deliver_freeze)
6925 {
6926 if (freeze_tell != NULL && freeze_tell[0] != 0 && !local_error_message)
6927 {
6928 uschar *s = string_copy(frozen_info);
6929 uschar *ss = Ustrstr(s, " by the system filter: ");
6930
6931 if (ss != NULL)
6932 {
6933 ss[21] = '.';
6934 ss[22] = '\n';
6935 }
6936
6937 ss = s;
6938 while (*ss != 0)
6939 {
6940 if (*ss == '\\' && ss[1] == 'n')
6941 {
6942 *ss++ = ' ';
6943 *ss++ = '\n';
6944 }
6945 else ss++;
6946 }
6947 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
6948 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
6949 s, sender_address);
6950 }
6951
6952 /* Log freezing just before we update the -H file, to minimize the chance
6953 of a race problem. */
6954
6955 deliver_msglog("*** Frozen%s\n", frozen_info);
6956 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
6957 }
6958
6959 /* If there have been any updates to the non-recipients list, or other things
6960 that get written to the spool, we must now update the spool header file so
6961 that it has the right information for the next delivery attempt. If there
6962 was more than one address being delivered, the header_change update is done
6963 earlier, in case one succeeds and then something crashes. */
6964
6965 DEBUG(D_deliver)
6966 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
6967 update_spool, header_rewritten);
6968
6969 if (update_spool || header_rewritten)
6970 /* Panic-dies on error */
6971 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6972 }
6973
6974 /* Finished with the message log. If the message is complete, it will have
6975 been unlinked or renamed above. */
6976
6977 if (message_logs) (void)fclose(message_log);
6978
6979 /* Now we can close and remove the journal file. Its only purpose is to record
6980 successfully completed deliveries asap so that this information doesn't get
6981 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
6982 not serious, as trying it again is not harmful. The journal might not be open
6983 if all addresses were deferred at routing or directing. Nevertheless, we must
6984 remove it if it exists (may have been lying around from a crash during the
6985 previous delivery attempt). We don't remove the journal if a delivery
6986 subprocess failed to pass back delivery information; this is controlled by
6987 the remove_journal flag. When the journal is left, we also don't move the
6988 message off the main spool if frozen and the option is set. It should get moved
6989 at the next attempt, after the journal has been inspected. */
6990
6991 if (journal_fd >= 0) (void)close(journal_fd);
6992
6993 if (remove_journal)
6994 {
6995 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
6996 if (Uunlink(spoolname) < 0 && errno != ENOENT)
6997 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", spoolname,
6998 strerror(errno));
6999
7000 /* Move the message off the spool if reqested */
7001
7002 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
7003 if (deliver_freeze && move_frozen_messages)
7004 (void)spool_move_message(id, message_subdir, US"", US"F");
7005 #endif
7006 }
7007
7008 /* Closing the data file frees the lock; if the file has been unlinked it
7009 will go away. Otherwise the message becomes available for another process
7010 to try delivery. */
7011
7012 (void)close(deliver_datafile);
7013 deliver_datafile = -1;
7014 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
7015
7016 /* It is unlikely that there will be any cached resources, since they are
7017 released after routing, and in the delivery subprocesses. However, it's
7018 possible for an expansion for something afterwards (for example,
7019 expand_check_condition) to do a lookup. We must therefore be sure everything is
7020 released. */
7021
7022 search_tidyup();
7023 return final_yield;
7024 }
7025
7026 /* End of deliver.c */