1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* The main code for delivering a message. */
15 /* Data block for keeping track of subprocesses for parallel remote
18 typedef struct pardata {
19 address_item *addrlist; /* chain of addresses */
20 address_item *addr; /* next address data expected for */
21 pid_t pid; /* subprocess pid */
22 int fd; /* pipe fd for getting result from subprocess */
23 int transport_count; /* returned transport count value */
24 BOOL done; /* no more data needed */
25 uschar *msg; /* error message */
26 uschar *return_path; /* return_path for these addresses */
29 /* Values for the process_recipients variable */
31 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
32 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
35 /* Mutually recursive functions for marking addresses done. */
37 static void child_done(address_item *, uschar *);
38 static void address_done(address_item *, uschar *);
40 /* Table for turning base-62 numbers into binary */
42 static uschar tab62[] =
43 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
44 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
45 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
46 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
47 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
48 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
52 /*************************************************
53 * Local static variables *
54 *************************************************/
56 /* addr_duplicate is global because it needs to be seen from the Envelope-To
59 static address_item *addr_defer = NULL;
60 static address_item *addr_failed = NULL;
61 static address_item *addr_fallback = NULL;
62 static address_item *addr_local = NULL;
63 static address_item *addr_new = NULL;
64 static address_item *addr_remote = NULL;
65 static address_item *addr_route = NULL;
66 static address_item *addr_succeed = NULL;
67 static address_item *addr_dsntmp = NULL;
68 static address_item *addr_senddsn = NULL;
70 static FILE *message_log = NULL;
71 static BOOL update_spool;
72 static BOOL remove_journal;
73 static int parcount = 0;
74 static pardata *parlist = NULL;
75 static int return_count;
76 static uschar *frozen_info = US"";
77 static uschar *used_return_path = NULL;
81 /*************************************************
82 * Make a new address item *
83 *************************************************/
85 /* This function gets the store and initializes with default values. The
86 transport_return value defaults to DEFER, so that any unexpected failure to
87 deliver does not wipe out the message. The default unique string is set to a
88 copy of the address, so that its domain can be lowercased.
91 address the RFC822 address string
92 copy force a copy of the address
94 Returns: a pointer to an initialized address_item
98 deliver_make_addr(uschar *address, BOOL copy)
100 address_item *addr = store_get(sizeof(address_item));
101 *addr = address_defaults;
102 if (copy) address = string_copy(address);
103 addr->address = address;
104 addr->unique = string_copy(address);
111 /*************************************************
112 * Set expansion values for an address *
113 *************************************************/
115 /* Certain expansion variables are valid only when handling an address or
116 address list. This function sets them up or clears the values, according to its
120 addr the address in question, or NULL to clear values
125 deliver_set_expansions(address_item *addr)
129 const uschar ***p = address_expansions;
130 while (*p) **p++ = NULL;
134 /* Exactly what gets set depends on whether there is one or more addresses, and
135 what they contain. These first ones are always set, taking their values from
136 the first address. */
138 if (!addr->host_list)
140 deliver_host = deliver_host_address = US"";
141 deliver_host_port = 0;
145 deliver_host = addr->host_list->name;
146 deliver_host_address = addr->host_list->address;
147 deliver_host_port = addr->host_list->port;
150 deliver_recipients = addr;
151 deliver_address_data = addr->prop.address_data;
152 deliver_domain_data = addr->prop.domain_data;
153 deliver_localpart_data = addr->prop.localpart_data;
155 /* These may be unset for multiple addresses */
157 deliver_domain = addr->domain;
158 self_hostname = addr->self_hostname;
160 #ifdef EXPERIMENTAL_BRIGHTMAIL
161 bmi_deliver = 1; /* deliver by default */
162 bmi_alt_location = NULL;
163 bmi_base64_verdict = NULL;
164 bmi_base64_tracker_verdict = NULL;
167 /* If there's only one address we can set everything. */
171 address_item *addr_orig;
173 deliver_localpart = addr->local_part;
174 deliver_localpart_prefix = addr->prefix;
175 deliver_localpart_suffix = addr->suffix;
177 for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ;
178 deliver_domain_orig = addr_orig->domain;
180 /* Re-instate any prefix and suffix in the original local part. In all
181 normal cases, the address will have a router associated with it, and we can
182 choose the caseful or caseless version accordingly. However, when a system
183 filter sets up a pipe, file, or autoreply delivery, no router is involved.
184 In this case, though, there won't be any prefix or suffix to worry about. */
186 deliver_localpart_orig = !addr_orig->router
187 ? addr_orig->local_part
188 : addr_orig->router->caseful_local_part
189 ? addr_orig->cc_local_part
190 : addr_orig->lc_local_part;
192 /* If there's a parent, make its domain and local part available, and if
193 delivering to a pipe or file, or sending an autoreply, get the local
194 part from the parent. For pipes and files, put the pipe or file string
195 into address_pipe and address_file. */
199 deliver_domain_parent = addr->parent->domain;
200 deliver_localpart_parent = !addr->parent->router
201 ? addr->parent->local_part
202 : addr->parent->router->caseful_local_part
203 ? addr->parent->cc_local_part
204 : addr->parent->lc_local_part;
206 /* File deliveries have their own flag because they need to be picked out
207 as special more often. */
209 if (testflag(addr, af_pfr))
211 if (testflag(addr, af_file)) address_file = addr->local_part;
212 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
213 deliver_localpart = addr->parent->local_part;
214 deliver_localpart_prefix = addr->parent->prefix;
215 deliver_localpart_suffix = addr->parent->suffix;
219 #ifdef EXPERIMENTAL_BRIGHTMAIL
220 /* Set expansion variables related to Brightmail AntiSpam */
221 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
222 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
223 /* get message delivery status (0 - don't deliver | 1 - deliver) */
224 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
225 /* if message is to be delivered, get eventual alternate location */
226 if (bmi_deliver == 1)
227 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
232 /* For multiple addresses, don't set local part, and leave the domain and
233 self_hostname set only if it is the same for all of them. It is possible to
234 have multiple pipe and file addresses, but only when all addresses have routed
235 to the same pipe or file. */
240 if (testflag(addr, af_pfr))
242 if (testflag(addr, af_file)) address_file = addr->local_part;
243 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
245 for (addr2 = addr->next; addr2; addr2 = addr2->next)
247 if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0)
248 deliver_domain = NULL;
250 && ( !addr2->self_hostname
251 || Ustrcmp(self_hostname, addr2->self_hostname) != 0
253 self_hostname = NULL;
254 if (!deliver_domain && !self_hostname) break;
262 /*************************************************
263 * Open a msglog file *
264 *************************************************/
266 /* This function is used both for normal message logs, and for files in the
267 msglog directory that are used to catch output from pipes. Try to create the
268 directory if it does not exist. From release 4.21, normal message logs should
269 be created when the message is received.
272 filename the file name
273 mode the mode required
274 error used for saying what failed
276 Returns: a file descriptor, or -1 (with errno set)
280 open_msglog_file(uschar *filename, int mode, uschar **error)
282 int fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
284 if (fd < 0 && errno == ENOENT)
286 (void)directory_make(spool_directory,
287 spool_sname(US"msglog", message_subdir),
288 MSGLOG_DIRECTORY_MODE, TRUE);
289 fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
292 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
293 function is called as root). Double check the mode, because the group setting
294 doesn't always get set automatically. */
298 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
299 if (fchown(fd, exim_uid, exim_gid) < 0)
304 if (fchmod(fd, mode) < 0)
310 else *error = US"create";
318 /*************************************************
319 * Write to msglog if required *
320 *************************************************/
322 /* Write to the message log, if configured. This function may also be called
326 format a string format
332 deliver_msglog(const char *format, ...)
335 if (!message_logs) return;
336 va_start(ap, format);
337 vfprintf(message_log, format, ap);
345 /*************************************************
346 * Replicate status for batch *
347 *************************************************/
349 /* When a transport handles a batch of addresses, it may treat them
350 individually, or it may just put the status in the first one, and return FALSE,
351 requesting that the status be copied to all the others externally. This is the
352 replication function. As well as the status, it copies the transport pointer,
353 which may have changed if appendfile passed the addresses on to a different
356 Argument: pointer to the first address in a chain
361 replicate_status(address_item *addr)
364 for (addr2 = addr->next; addr2; addr2 = addr2->next)
366 addr2->transport = addr->transport;
367 addr2->transport_return = addr->transport_return;
368 addr2->basic_errno = addr->basic_errno;
369 addr2->more_errno = addr->more_errno;
370 addr2->special_action = addr->special_action;
371 addr2->message = addr->message;
372 addr2->user_message = addr->user_message;
378 /*************************************************
379 * Compare lists of hosts *
380 *************************************************/
382 /* This function is given two pointers to chains of host items, and it yields
383 TRUE if the lists refer to the same hosts in the same order, except that
385 (1) Multiple hosts with the same non-negative MX values are permitted to appear
386 in different orders. Round-robinning nameservers can cause this to happen.
388 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
389 permitted to appear in different orders. This is caused by randomizing
392 This enables Exim to use a single SMTP transaction for sending to two entirely
393 different domains that happen to end up pointing at the same hosts.
396 one points to the first host list
397 two points to the second host list
399 Returns: TRUE if the lists refer to the same host set
403 same_hosts(host_item *one, host_item *two)
407 if (Ustrcmp(one->name, two->name) != 0)
410 host_item *end_one = one;
411 host_item *end_two = two;
413 /* Batch up only if there was no MX and the list was not randomized */
415 if (mx == MX_NONE) return FALSE;
417 /* Find the ends of the shortest sequence of identical MX values */
419 while ( end_one->next && end_one->next->mx == mx
420 && end_two->next && end_two->next->mx == mx)
422 end_one = end_one->next;
423 end_two = end_two->next;
426 /* If there aren't any duplicates, there's no match. */
428 if (end_one == one) return FALSE;
430 /* For each host in the 'one' sequence, check that it appears in the 'two'
431 sequence, returning FALSE if not. */
436 for (hi = two; hi != end_two->next; hi = hi->next)
437 if (Ustrcmp(one->name, hi->name) == 0) break;
438 if (hi == end_two->next) return FALSE;
439 if (one == end_one) break;
443 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
444 Ensure both are pointing at the last host, and carry on as for equality. */
455 /* True if both are NULL */
462 /*************************************************
463 * Compare header lines *
464 *************************************************/
466 /* This function is given two pointers to chains of header items, and it yields
467 TRUE if they are the same header texts in the same order.
470 one points to the first header list
471 two points to the second header list
473 Returns: TRUE if the lists refer to the same header set
477 same_headers(header_line *one, header_line *two)
479 for (;; one = one->next, two = two->next)
481 if (one == two) return TRUE; /* Includes the case where both NULL */
482 if (!one || !two) return FALSE;
483 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
489 /*************************************************
490 * Compare string settings *
491 *************************************************/
493 /* This function is given two pointers to strings, and it returns
494 TRUE if they are the same pointer, or if the two strings are the same.
497 one points to the first string
498 two points to the second string
500 Returns: TRUE or FALSE
504 same_strings(uschar *one, uschar *two)
506 if (one == two) return TRUE; /* Includes the case where both NULL */
507 if (!one || !two) return FALSE;
508 return (Ustrcmp(one, two) == 0);
513 /*************************************************
514 * Compare uid/gid for addresses *
515 *************************************************/
517 /* This function is given a transport and two addresses. It yields TRUE if the
518 uid/gid/initgroups settings for the two addresses are going to be the same when
523 addr1 the first address
524 addr2 the second address
526 Returns: TRUE or FALSE
530 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
532 if ( !tp->uid_set && !tp->expand_uid
533 && !tp->deliver_as_creator
534 && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set)
535 || ( testflag(addr1, af_uid_set)
536 && ( addr1->uid != addr2->uid
537 || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)
541 if ( !tp->gid_set && !tp->expand_gid
542 && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set)
543 || ( testflag(addr1, af_gid_set)
544 && addr1->gid != addr2->gid
554 /*************************************************
555 * Record that an address is complete *
556 *************************************************/
558 /* This function records that an address is complete. This is straightforward
559 for most addresses, where the unique address is just the full address with the
560 domain lower cased. For homonyms (addresses that are the same as one of their
561 ancestors) their are complications. Their unique addresses have \x\ prepended
562 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
565 Exim used to record the unique addresses of homonyms as "complete". This,
566 however, fails when the pattern of redirection varies over time (e.g. if taking
567 unseen copies at only some times of day) because the prepended numbers may vary
568 from one delivery run to the next. This problem is solved by never recording
569 prepended unique addresses as complete. Instead, when a homonymic address has
570 actually been delivered via a transport, we record its basic unique address
571 followed by the name of the transport. This is checked in subsequent delivery
572 runs whenever an address is routed to a transport.
574 If the completed address is a top-level one (has no parent, which means it
575 cannot be homonymic) we also add the original address to the non-recipients
576 tree, so that it gets recorded in the spool file and therefore appears as
577 "done" in any spool listings. The original address may differ from the unique
578 address in the case of the domain.
580 Finally, this function scans the list of duplicates, marks as done any that
581 match this address, and calls child_done() for their ancestors.
584 addr address item that has been completed
585 now current time as a string
591 address_done(address_item *addr, uschar *now)
595 update_spool = TRUE; /* Ensure spool gets updated */
597 /* Top-level address */
601 tree_add_nonrecipient(addr->unique);
602 tree_add_nonrecipient(addr->address);
605 /* Homonymous child address */
607 else if (testflag(addr, af_homonym))
610 tree_add_nonrecipient(
611 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
614 /* Non-homonymous child address */
616 else tree_add_nonrecipient(addr->unique);
618 /* Check the list of duplicate addresses and ensure they are now marked
621 for (dup = addr_duplicate; dup; dup = dup->next)
622 if (Ustrcmp(addr->unique, dup->unique) == 0)
624 tree_add_nonrecipient(dup->unique);
625 child_done(dup, now);
632 /*************************************************
633 * Decrease counts in parents and mark done *
634 *************************************************/
636 /* This function is called when an address is complete. If there is a parent
637 address, its count of children is decremented. If there are still other
638 children outstanding, the function exits. Otherwise, if the count has become
639 zero, address_done() is called to mark the parent and its duplicates complete.
640 Then loop for any earlier ancestors.
643 addr points to the completed address item
644 now the current time as a string, for writing to the message log
650 child_done(address_item *addr, uschar *now)
656 if ((addr->child_count -= 1) > 0) return; /* Incomplete parent */
657 address_done(addr, now);
659 /* Log the completion of all descendents only when there is no ancestor with
660 the same original address. */
662 for (aa = addr->parent; aa; aa = aa->parent)
663 if (Ustrcmp(aa->address, addr->address) == 0) break;
666 deliver_msglog("%s %s: children all complete\n", now, addr->address);
667 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
673 /*************************************************
674 * Delivery logging support functions *
675 *************************************************/
677 /* The LOGGING() checks in d_log_interface() are complicated for backwards
678 compatibility. When outgoing interface logging was originally added, it was
679 conditional on just incoming_interface (which is off by default). The
680 outgoing_interface option is on by default to preserve this behaviour, but
681 you can enable incoming_interface and disable outgoing_interface to get I=
682 fields on incoming lines only.
685 s The log line buffer
686 sizep Pointer to the buffer size
687 ptrp Pointer to current index into buffer
688 addr The address to be logged
690 Returns: New value for s
694 d_log_interface(uschar *s, int *sizep, int *ptrp)
696 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
697 && sending_ip_address)
699 s = string_append(s, sizep, ptrp, 2, US" I=[", sending_ip_address);
700 s = LOGGING(outgoing_port)
701 ? string_append(s, sizep, ptrp, 2, US"]:",
702 string_sprintf("%d", sending_port))
703 : string_catn(s, sizep, ptrp, US"]", 1);
711 d_hostlog(uschar * s, int * sp, int * pp, address_item * addr)
713 host_item * h = addr->host_used;
715 s = string_append(s, sp, pp, 2, US" H=", h->name);
717 if (LOGGING(dnssec) && h->dnssec == DS_YES)
718 s = string_cat(s, sp, pp, US" DS");
720 s = string_append(s, sp, pp, 3, US" [", h->address, US"]");
722 if (LOGGING(outgoing_port))
723 s = string_append(s, sp, pp, 2, US":", string_sprintf("%d", h->port));
726 if (LOGGING(proxy) && proxy_local_address)
728 s = string_append(s, sp, pp, 3, US" PRX=[", proxy_local_address, US"]");
729 if (LOGGING(outgoing_port))
730 s = string_append(s, sp, pp, 2, US":", string_sprintf("%d",
735 return d_log_interface(s, sp, pp);
744 d_tlslog(uschar * s, int * sizep, int * ptrp, address_item * addr)
746 if (LOGGING(tls_cipher) && addr->cipher)
747 s = string_append(s, sizep, ptrp, 2, US" X=", addr->cipher);
748 if (LOGGING(tls_certificate_verified) && addr->cipher)
749 s = string_append(s, sizep, ptrp, 2, US" CV=",
750 testflag(addr, af_cert_verified)
752 #ifdef EXPERIMENTAL_DANE
753 testflag(addr, af_dane_verified)
759 if (LOGGING(tls_peerdn) && addr->peerdn)
760 s = string_append(s, sizep, ptrp, 3, US" DN=\"",
761 string_printing(addr->peerdn), US"\"");
769 #ifndef DISABLE_EVENT
771 event_raise(uschar * action, const uschar * event, uschar * ev_data)
777 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
779 action, deliver_host_address);
782 event_data = ev_data;
784 if (!(s = expand_string(action)) && *expand_string_message)
785 log_write(0, LOG_MAIN|LOG_PANIC,
786 "failed to expand event_action %s in %s: %s\n",
787 event, transport_name, expand_string_message);
789 event_name = event_data = NULL;
791 /* If the expansion returns anything but an empty string, flag for
792 the caller to modify his normal processing
797 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
805 msg_event_raise(const uschar * event, const address_item * addr)
807 const uschar * save_domain = deliver_domain;
808 uschar * save_local = deliver_localpart;
809 const uschar * save_host = deliver_host;
810 const uschar * save_address = deliver_host_address;
811 const int save_port = deliver_host_port;
813 if (!addr->transport)
816 router_name = addr->router ? addr->router->name : NULL;
817 transport_name = addr->transport->name;
818 deliver_domain = addr->domain;
819 deliver_localpart = addr->local_part;
820 deliver_host = addr->host_used ? addr->host_used->name : NULL;
822 (void) event_raise(addr->transport->event_action, event,
824 || Ustrcmp(addr->transport->driver_name, "smtp") == 0
825 || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
826 ? addr->message : NULL);
828 deliver_host_port = save_port;
829 deliver_host_address = save_address;
830 deliver_host = save_host;
831 deliver_localpart = save_local;
832 deliver_domain = save_domain;
833 router_name = transport_name = NULL;
835 #endif /*DISABLE_EVENT*/
839 /******************************************************************************/
842 /*************************************************
843 * Generate local prt for logging *
844 *************************************************/
846 /* This function is a subroutine for use in string_log_address() below.
849 addr the address being logged
850 yield the current dynamic buffer pointer
851 sizeptr points to current size
852 ptrptr points to current insert pointer
854 Returns: the new value of the buffer pointer
858 string_get_localpart(address_item *addr, uschar *yield, int *sizeptr,
864 if (testflag(addr, af_include_affixes) && s)
867 if (testflag(addr, af_utf8_downcvt))
868 s = string_localpart_utf8_to_alabel(s, NULL);
870 yield = string_cat(yield, sizeptr, ptrptr, s);
873 s = addr->local_part;
875 if (testflag(addr, af_utf8_downcvt))
876 s = string_localpart_utf8_to_alabel(s, NULL);
878 yield = string_cat(yield, sizeptr, ptrptr, s);
881 if (testflag(addr, af_include_affixes) && s)
884 if (testflag(addr, af_utf8_downcvt))
885 s = string_localpart_utf8_to_alabel(s, NULL);
887 yield = string_cat(yield, sizeptr, ptrptr, s);
894 /*************************************************
895 * Generate log address list *
896 *************************************************/
898 /* This function generates a list consisting of an address and its parents, for
899 use in logging lines. For saved onetime aliased addresses, the onetime parent
900 field is used. If the address was delivered by a transport with rcpt_include_
901 affixes set, the af_include_affixes bit will be set in the address. In that
902 case, we include the affixes here too.
905 str points to start of growing string, or NULL
906 size points to current allocation for string
907 ptr points to offset for append point; updated on exit
908 addr bottom (ultimate) address
909 all_parents if TRUE, include all parents
910 success TRUE for successful delivery
912 Returns: a growable string in dynamic store
916 string_log_address(uschar * str, int * size, int * ptr,
917 address_item *addr, BOOL all_parents, BOOL success)
919 BOOL add_topaddr = TRUE;
920 address_item *topaddr;
922 /* Find the ultimate parent */
924 for (topaddr = addr; topaddr->parent; topaddr = topaddr->parent) ;
926 /* We start with just the local part for pipe, file, and reply deliveries, and
927 for successful local deliveries from routers that have the log_as_local flag
928 set. File deliveries from filters can be specified as non-absolute paths in
929 cases where the transport is goin to complete the path. If there is an error
930 before this happens (expansion failure) the local part will not be updated, and
931 so won't necessarily look like a path. Add extra text for this case. */
933 if ( testflag(addr, af_pfr)
935 && addr->router && addr->router->log_as_local
936 && addr->transport && addr->transport->info->local
939 if (testflag(addr, af_file) && addr->local_part[0] != '/')
940 str = string_catn(str, size, ptr, CUS"save ", 5);
941 str = string_get_localpart(addr, str, size, ptr);
944 /* Other deliveries start with the full address. It we have split it into local
945 part and domain, use those fields. Some early failures can happen before the
946 splitting is done; in those cases use the original field. */
950 uschar * cmp = str + *ptr;
952 if (addr->local_part)
955 str = string_get_localpart(addr, str, size, ptr);
956 str = string_catn(str, size, ptr, US"@", 1);
959 if (testflag(addr, af_utf8_downcvt))
960 s = string_localpart_utf8_to_alabel(s, NULL);
962 str = string_cat(str, size, ptr, s);
965 str = string_cat(str, size, ptr, addr->address);
967 /* If the address we are going to print is the same as the top address,
968 and all parents are not being included, don't add on the top address. First
969 of all, do a caseless comparison; if this succeeds, do a caseful comparison
970 on the local parts. */
973 if ( strcmpic(cmp, topaddr->address) == 0
974 && Ustrncmp(cmp, topaddr->address, Ustrchr(cmp, '@') - cmp) == 0
975 && !addr->onetime_parent
976 && (!all_parents || !addr->parent || addr->parent == topaddr)
981 /* If all parents are requested, or this is a local pipe/file/reply, and
982 there is at least one intermediate parent, show it in brackets, and continue
983 with all of them if all are wanted. */
985 if ( (all_parents || testflag(addr, af_pfr))
987 && addr->parent != topaddr)
991 for (addr2 = addr->parent; addr2 != topaddr; addr2 = addr2->parent)
993 str = string_catn(str, size, ptr, s, 2);
994 str = string_cat (str, size, ptr, addr2->address);
995 if (!all_parents) break;
998 str = string_catn(str, size, ptr, US")", 1);
1001 /* Add the top address if it is required */
1004 str = string_append(str, size, ptr, 3,
1006 addr->onetime_parent ? addr->onetime_parent : topaddr->address,
1013 /******************************************************************************/
1017 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
1018 this is a nonstandard call; no two-character delivery flag is written
1019 but sender-host and sender are prefixed and "msg" is inserted in the log line.
1022 flags passed to log_write()
1025 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
1027 int size = 256; /* Used for a temporary, */
1028 int ptr = 0; /* expanding buffer, for */
1029 uschar * s; /* building log lines; */
1030 void * reset_point; /* released afterwards. */
1032 /* Log the delivery on the main log. We use an extensible string to build up
1033 the log line, and reset the store afterwards. Remote deliveries should always
1034 have a pointer to the host item that succeeded; local deliveries can have a
1035 pointer to a single host item in their host list, for use by the transport. */
1037 #ifndef DISABLE_EVENT
1038 /* presume no successful remote delivery */
1039 lookup_dnssec_authenticated = NULL;
1042 s = reset_point = store_get(size);
1045 s = string_append(s, &size, &ptr, 2, host_and_ident(TRUE), US" ");
1049 s = string_catn(s, &size, &ptr, US"> ", 2);
1051 s = string_log_address(s, &size, &ptr, addr, LOGGING(all_parents), TRUE);
1053 if (LOGGING(sender_on_delivery) || msg)
1054 s = string_append(s, &size, &ptr, 3, US" F=<",
1056 testflag(addr, af_utf8_downcvt)
1057 ? string_address_utf8_to_alabel(sender_address, NULL)
1064 s = string_append(s, &size, &ptr, 2, US" Q=", queue_name);
1066 #ifdef EXPERIMENTAL_SRS
1067 if(addr->prop.srs_sender)
1068 s = string_append(s, &size, &ptr, 3, US" SRS=<", addr->prop.srs_sender, US">");
1071 /* You might think that the return path must always be set for a successful
1072 delivery; indeed, I did for some time, until this statement crashed. The case
1073 when it is not set is for a delivery to /dev/null which is optimised by not
1074 being run at all. */
1076 if (used_return_path && LOGGING(return_path_on_delivery))
1077 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1080 s = string_append(s, &size, &ptr, 2, US" ", msg);
1082 /* For a delivery from a system filter, there may not be a router */
1084 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1086 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1088 if (LOGGING(delivery_size))
1089 s = string_append(s, &size, &ptr, 2, US" S=",
1090 string_sprintf("%d", transport_count));
1092 /* Local delivery */
1094 if (addr->transport->info->local)
1096 if (addr->host_list)
1097 s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name);
1098 s = d_log_interface(s, &size, &ptr);
1099 if (addr->shadow_message)
1100 s = string_cat(s, &size, &ptr, addr->shadow_message);
1103 /* Remote delivery */
1107 if (addr->host_used)
1109 s = d_hostlog(s, &size, &ptr, addr);
1110 if (continue_sequence > 1)
1111 s = string_catn(s, &size, &ptr, US"*", 1);
1113 #ifndef DISABLE_EVENT
1114 deliver_host_address = addr->host_used->address;
1115 deliver_host_port = addr->host_used->port;
1116 deliver_host = addr->host_used->name;
1118 /* DNS lookup status */
1119 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
1120 : addr->host_used->dnssec==DS_NO ? US"no"
1126 s = d_tlslog(s, &size, &ptr, addr);
1129 if (addr->authenticator)
1131 s = string_append(s, &size, &ptr, 2, US" A=", addr->authenticator);
1134 s = string_append(s, &size, &ptr, 2, US":", addr->auth_id);
1135 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
1136 s = string_append(s, &size, &ptr, 2, US":", addr->auth_sndr);
1140 #ifndef DISABLE_PRDR
1141 if (addr->flags & af_prdr_used)
1142 s = string_append(s, &size, &ptr, 1, US" PRDR");
1146 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
1148 if ( LOGGING(smtp_confirmation)
1150 && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0)
1154 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
1155 uschar *p = big_buffer;
1156 uschar *ss = addr->message;
1158 for (i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
1160 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
1165 s = string_append(s, &size, &ptr, 2, US" C=", big_buffer);
1168 /* Time on queue and actual time taken to deliver */
1170 if (LOGGING(queue_time))
1171 s = string_append(s, &size, &ptr, 2, US" QT=",
1172 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
1174 if (LOGGING(deliver_time))
1175 s = string_append(s, &size, &ptr, 2, US" DT=",
1176 readconf_printtime(addr->more_errno));
1178 /* string_cat() always leaves room for the terminator. Release the
1179 store we used to build the line after writing it. */
1182 log_write(0, flags, "%s", s);
1184 #ifndef DISABLE_EVENT
1185 if (!msg) msg_event_raise(US"msg:delivery", addr);
1188 store_reset(reset_point);
1195 deferral_log(address_item * addr, uschar * now,
1196 int logflags, uschar * driver_name, uschar * driver_kind)
1198 int size = 256; /* Used for a temporary, */
1199 int ptr = 0; /* expanding buffer, for */
1200 uschar * s; /* building log lines; */
1201 void * reset_point; /* released afterwards. */
1205 /* Build up the line that is used for both the message log and the main
1208 s = reset_point = store_get(size);
1210 /* Create the address string for logging. Must not do this earlier, because
1211 an OK result may be changed to FAIL when a pipe returns text. */
1213 s = string_log_address(s, &size, &ptr, addr, LOGGING(all_parents), FALSE);
1216 s = string_append(s, &size, &ptr, 2, US" Q=", queue_name);
1218 /* Either driver_name contains something and driver_kind contains
1219 " router" or " transport" (note the leading space), or driver_name is
1220 a null string and driver_kind contains "routing" without the leading
1221 space, if all routing has been deferred. When a domain has been held,
1222 so nothing has been done at all, both variables contain null strings. */
1226 if (driver_kind[1] == 't' && addr->router)
1227 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1229 ss[1] = toupper(driver_kind[1]);
1230 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1232 else if (driver_kind)
1233 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1235 /*XXX need an s+s+p sprintf */
1236 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1237 s = string_cat(s, &size, &ptr, ss);
1239 if (addr->basic_errno > 0)
1240 s = string_append(s, &size, &ptr, 2, US": ",
1241 US strerror(addr->basic_errno));
1243 if (addr->host_used)
1245 s = string_append(s, &size, &ptr, 5,
1246 US" H=", addr->host_used->name,
1247 US" [", addr->host_used->address, US"]");
1248 if (LOGGING(outgoing_port))
1250 int port = addr->host_used->port;
1251 s = string_append(s, &size, &ptr, 2,
1252 US":", port == PORT_NONE ? US"25" : string_sprintf("%d", port));
1257 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1261 /* Log the deferment in the message log, but don't clutter it
1262 up with retry-time defers after the first delivery attempt. */
1264 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1265 deliver_msglog("%s %s\n", now, s);
1267 /* Write the main log and reset the store.
1268 For errors of the type "retry time not reached" (also remotes skipped
1269 on queue run), logging is controlled by L_retry_defer. Note that this kind
1270 of error number is negative, and all the retry ones are less than any
1274 log_write(addr->basic_errno <= ERRNO_RETRY_BASE ? L_retry_defer : 0, logflags,
1277 store_reset(reset_point);
1284 failure_log(address_item * addr, uschar * driver_kind, uschar * now)
1286 int size = 256; /* Used for a temporary, */
1287 int ptr = 0; /* expanding buffer, for */
1288 uschar * s; /* building log lines; */
1289 void * reset_point; /* released afterwards. */
1291 /* Build up the log line for the message and main logs */
1293 s = reset_point = store_get(size);
1295 /* Create the address string for logging. Must not do this earlier, because
1296 an OK result may be changed to FAIL when a pipe returns text. */
1298 s = string_log_address(s, &size, &ptr, addr, LOGGING(all_parents), FALSE);
1300 if (LOGGING(sender_on_delivery))
1301 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1304 s = string_append(s, &size, &ptr, 2, US" Q=", queue_name);
1306 /* Return path may not be set if no delivery actually happened */
1308 if (used_return_path && LOGGING(return_path_on_delivery))
1309 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1312 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1313 if (addr->transport)
1314 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1316 if (addr->host_used)
1317 s = d_hostlog(s, &size, &ptr, addr);
1320 s = d_tlslog(s, &size, &ptr, addr);
1323 if (addr->basic_errno > 0)
1324 s = string_append(s, &size, &ptr, 2, US": ", US strerror(addr->basic_errno));
1327 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1331 /* Do the logging. For the message log, "routing failed" for those cases,
1332 just to make it clearer. */
1335 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1337 deliver_msglog("%s %s\n", now, s);
1339 log_write(0, LOG_MAIN, "** %s", s);
1341 #ifndef DISABLE_EVENT
1342 msg_event_raise(US"msg:fail:delivery", addr);
1345 store_reset(reset_point);
1351 /*************************************************
1352 * Actions at the end of handling an address *
1353 *************************************************/
1355 /* This is a function for processing a single address when all that can be done
1356 with it has been done.
1359 addr points to the address block
1360 result the result of the delivery attempt
1361 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1362 driver_type indicates which type of driver (transport, or router) was last
1363 to process the address
1364 logchar '=' or '-' for use when logging deliveries with => or ->
1370 post_process_one(address_item *addr, int result, int logflags, int driver_type,
1373 uschar *now = tod_stamp(tod_log);
1374 uschar *driver_kind = NULL;
1375 uschar *driver_name = NULL;
1377 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1379 /* Set up driver kind and name for logging. Disable logging if the router or
1380 transport has disabled it. */
1382 if (driver_type == DTYPE_TRANSPORT)
1384 if (addr->transport)
1386 driver_name = addr->transport->name;
1387 driver_kind = US" transport";
1388 disable_logging = addr->transport->disable_logging;
1390 else driver_kind = US"transporting";
1392 else if (driver_type == DTYPE_ROUTER)
1396 driver_name = addr->router->name;
1397 driver_kind = US" router";
1398 disable_logging = addr->router->disable_logging;
1400 else driver_kind = US"routing";
1403 /* If there's an error message set, ensure that it contains only printing
1404 characters - it should, but occasionally things slip in and this at least
1405 stops the log format from getting wrecked. We also scan the message for an LDAP
1406 expansion item that has a password setting, and flatten the password. This is a
1407 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1408 malformed, it won't ever have gone near LDAP.) */
1412 const uschar * s = string_printing(addr->message);
1414 /* deconst cast ok as string_printing known to have alloc'n'copied */
1415 addr->message = expand_hide_passwords(US s);
1418 /* If we used a transport that has one of the "return_output" options set, and
1419 if it did in fact generate some output, then for return_output we treat the
1420 message as failed if it was not already set that way, so that the output gets
1421 returned to the sender, provided there is a sender to send it to. For
1422 return_fail_output, do this only if the delivery failed. Otherwise we just
1423 unlink the file, and remove the name so that if the delivery failed, we don't
1424 try to send back an empty or unwanted file. The log_output options operate only
1425 on a non-empty file.
1427 In any case, we close the message file, because we cannot afford to leave a
1428 file-descriptor for one address while processing (maybe very many) others. */
1430 if (addr->return_file >= 0 && addr->return_filename)
1432 BOOL return_output = FALSE;
1433 struct stat statbuf;
1434 (void)EXIMfsync(addr->return_file);
1436 /* If there is no output, do nothing. */
1438 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1440 transport_instance *tb = addr->transport;
1442 /* Handle logging options */
1445 || result == FAIL && tb->log_fail_output
1446 || result == DEFER && tb->log_defer_output
1450 FILE *f = Ufopen(addr->return_filename, "rb");
1452 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1453 "from %s transport: %s", addr->return_filename, tb->name,
1456 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1458 uschar *p = big_buffer + Ustrlen(big_buffer);
1460 while (p > big_buffer && isspace(p[-1])) p--;
1462 sp = string_printing(big_buffer);
1463 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1464 addr->address, tb->name, sp);
1469 /* Handle returning options, but only if there is an address to return
1472 if (sender_address[0] != 0 || addr->prop.errors_address)
1473 if (tb->return_output)
1475 addr->transport_return = result = FAIL;
1476 if (addr->basic_errno == 0 && !addr->message)
1477 addr->message = US"return message generated";
1478 return_output = TRUE;
1481 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1484 /* Get rid of the file unless it might be returned, but close it in
1489 Uunlink(addr->return_filename);
1490 addr->return_filename = NULL;
1491 addr->return_file = -1;
1494 (void)close(addr->return_file);
1497 /* The success case happens only after delivery by a transport. */
1501 addr->next = addr_succeed;
1502 addr_succeed = addr;
1504 /* Call address_done() to ensure that we don't deliver to this address again,
1505 and write appropriate things to the message log. If it is a child address, we
1506 call child_done() to scan the ancestors and mark them complete if this is the
1507 last child to complete. */
1509 address_done(addr, now);
1510 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1513 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1514 driver_name, driver_kind);
1517 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1518 addr->parent->address, driver_name, driver_kind);
1519 child_done(addr, now);
1522 /* Certificates for logging (via events) */
1524 tls_out.ourcert = addr->ourcert;
1525 addr->ourcert = NULL;
1526 tls_out.peercert = addr->peercert;
1527 addr->peercert = NULL;
1529 tls_out.cipher = addr->cipher;
1530 tls_out.peerdn = addr->peerdn;
1531 tls_out.ocsp = addr->ocsp;
1532 # ifdef EXPERIMENTAL_DANE
1533 tls_out.dane_verified = testflag(addr, af_dane_verified);
1537 delivery_log(LOG_MAIN, addr, logchar, NULL);
1540 tls_free_cert(&tls_out.ourcert);
1541 tls_free_cert(&tls_out.peercert);
1542 tls_out.cipher = NULL;
1543 tls_out.peerdn = NULL;
1544 tls_out.ocsp = OCSP_NOT_REQ;
1545 # ifdef EXPERIMENTAL_DANE
1546 tls_out.dane_verified = FALSE;
1552 /* Soft failure, or local delivery process failed; freezing may be
1555 else if (result == DEFER || result == PANIC)
1557 if (result == PANIC) logflags |= LOG_PANIC;
1559 /* This puts them on the chain in reverse order. Do not change this, because
1560 the code for handling retries assumes that the one with the retry
1561 information is last. */
1563 addr->next = addr_defer;
1566 /* The only currently implemented special action is to freeze the
1567 message. Logging of this is done later, just before the -H file is
1570 if (addr->special_action == SPECIAL_FREEZE)
1572 deliver_freeze = TRUE;
1573 deliver_frozen_at = time(NULL);
1574 update_spool = TRUE;
1577 /* If doing a 2-stage queue run, we skip writing to either the message
1578 log or the main log for SMTP defers. */
1580 if (!queue_2stage || addr->basic_errno != 0)
1581 deferral_log(addr, now, logflags, driver_name, driver_kind);
1585 /* Hard failure. If there is an address to which an error message can be sent,
1586 put this address on the failed list. If not, put it on the deferred list and
1587 freeze the mail message for human attention. The latter action can also be
1588 explicitly requested by a router or transport. */
1592 /* If this is a delivery error, or a message for which no replies are
1593 wanted, and the message's age is greater than ignore_bounce_errors_after,
1594 force the af_ignore_error flag. This will cause the address to be discarded
1595 later (with a log entry). */
1597 if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
1598 setflag(addr, af_ignore_error);
1600 /* Freeze the message if requested, or if this is a bounce message (or other
1601 message with null sender) and this address does not have its own errors
1602 address. However, don't freeze if errors are being ignored. The actual code
1603 to ignore occurs later, instead of sending a message. Logging of freezing
1604 occurs later, just before writing the -H file. */
1606 if ( !testflag(addr, af_ignore_error)
1607 && ( addr->special_action == SPECIAL_FREEZE
1608 || (sender_address[0] == 0 && !addr->prop.errors_address)
1611 frozen_info = addr->special_action == SPECIAL_FREEZE
1613 : sender_local && !local_error_message
1614 ? US" (message created with -f <>)"
1615 : US" (delivery error message)";
1616 deliver_freeze = TRUE;
1617 deliver_frozen_at = time(NULL);
1618 update_spool = TRUE;
1620 /* The address is put on the defer rather than the failed queue, because
1621 the message is being retained. */
1623 addr->next = addr_defer;
1627 /* Don't put the address on the nonrecipients tree yet; wait until an
1628 error message has been successfully sent. */
1632 addr->next = addr_failed;
1636 failure_log(addr, driver_name ? NULL : driver_kind, now);
1639 /* Ensure logging is turned on again in all cases */
1641 disable_logging = FALSE;
1647 /*************************************************
1648 * Address-independent error *
1649 *************************************************/
1651 /* This function is called when there's an error that is not dependent on a
1652 particular address, such as an expansion string failure. It puts the error into
1653 all the addresses in a batch, logs the incident on the main and panic logs, and
1654 clears the expansions. It is mostly called from local_deliver(), but can be
1655 called for a remote delivery via findugid().
1658 logit TRUE if (MAIN+PANIC) logging required
1659 addr the first of the chain of addresses
1661 format format string for error message, or NULL if already set in addr
1662 ... arguments for the format
1668 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1670 address_item *addr2;
1671 addr->basic_errno = code;
1677 va_start(ap, format);
1678 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1679 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1680 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1682 addr->message = string_copy(buffer);
1685 for (addr2 = addr->next; addr2; addr2 = addr2->next)
1687 addr2->basic_errno = code;
1688 addr2->message = addr->message;
1691 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1692 deliver_set_expansions(NULL);
1698 /*************************************************
1699 * Check a "never users" list *
1700 *************************************************/
1702 /* This function is called to check whether a uid is on one of the two "never
1706 uid the uid to be checked
1707 nusers the list to be scanned; the first item in the list is the count
1709 Returns: TRUE if the uid is on the list
1713 check_never_users(uid_t uid, uid_t *nusers)
1716 if (!nusers) return FALSE;
1717 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1723 /*************************************************
1724 * Find uid and gid for a transport *
1725 *************************************************/
1727 /* This function is called for both local and remote deliveries, to find the
1728 uid/gid under which to run the delivery. The values are taken preferentially
1729 from the transport (either explicit or deliver_as_creator), then from the
1730 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1731 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1732 panic error is logged, and the function fails (which normally leads to delivery
1736 addr the address (possibly a chain)
1738 uidp pointer to uid field
1739 gidp pointer to gid field
1740 igfp pointer to the use_initgroups field
1742 Returns: FALSE if failed - error has been set in address(es)
1746 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1750 BOOL gid_set = FALSE;
1752 /* Default initgroups flag comes from the transport */
1754 *igfp = tp->initgroups;
1756 /* First see if there's a gid on the transport, either fixed or expandable.
1757 The expanding function always logs failure itself. */
1764 else if (tp->expand_gid)
1766 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1769 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1775 /* If the transport did not set a group, see if the router did. */
1777 if (!gid_set && testflag(addr, af_gid_set))
1783 /* Pick up a uid from the transport if one is set. */
1785 if (tp->uid_set) *uidp = tp->uid;
1787 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1788 it does not provide a passwd value from which a gid can be taken. */
1790 else if (tp->expand_uid)
1793 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1794 uidp, &(addr->message)))
1796 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1806 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1808 else if (tp->deliver_as_creator)
1810 *uidp = originator_uid;
1813 *gidp = originator_gid;
1818 /* Otherwise see if the address specifies the uid and if so, take it and its
1821 else if (testflag(addr, af_uid_set))
1824 *igfp = testflag(addr, af_initgroups);
1827 /* Nothing has specified the uid - default to the Exim user, and group if the
1840 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1841 defaulting to the Exim uid. In other words, if the configuration has specified
1842 a uid, it must also provide a gid. */
1846 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1847 "%s transport", tp->name);
1851 /* Check that the uid is not on the lists of banned uids that may not be used
1852 for delivery processes. */
1854 nuname = check_never_users(*uidp, never_users)
1856 : check_never_users(*uidp, fixed_never_users)
1857 ? US"fixed_never_users"
1861 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1862 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1874 /*************************************************
1875 * Check the size of a message for a transport *
1876 *************************************************/
1878 /* Checks that the message isn't too big for the selected transport.
1879 This is called only when it is known that the limit is set.
1883 addr the (first) address being delivered
1886 DEFER expansion failed or did not yield an integer
1887 FAIL message too big
1891 check_message_size(transport_instance *tp, address_item *addr)
1896 deliver_set_expansions(addr);
1897 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1898 deliver_set_expansions(NULL);
1900 if (expand_string_message)
1903 addr->message = size_limit == -1
1904 ? string_sprintf("failed to expand message_size_limit "
1905 "in %s transport: %s", tp->name, expand_string_message)
1906 : string_sprintf("invalid message_size_limit "
1907 "in %s transport: %s", tp->name, expand_string_message);
1909 else if (size_limit > 0 && message_size > size_limit)
1913 string_sprintf("message is too big (transport limit = %d)",
1922 /*************************************************
1923 * Transport-time check for a previous delivery *
1924 *************************************************/
1926 /* Check that this base address hasn't previously been delivered to its routed
1927 transport. If it has been delivered, mark it done. The check is necessary at
1928 delivery time in order to handle homonymic addresses correctly in cases where
1929 the pattern of redirection changes between delivery attempts (so the unique
1930 fields change). Non-homonymic previous delivery is detected earlier, at routing
1931 time (which saves unnecessary routing).
1934 addr the address item
1935 testing TRUE if testing wanted only, without side effects
1937 Returns: TRUE if previously delivered by the transport
1941 previously_transported(address_item *addr, BOOL testing)
1943 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
1944 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
1946 if (tree_search(tree_nonrecipients, big_buffer) != 0)
1948 DEBUG(D_deliver|D_route|D_transport)
1949 debug_printf("%s was previously delivered (%s transport): discarded\n",
1950 addr->address, addr->transport->name);
1951 if (!testing) child_done(addr, tod_stamp(tod_log));
1960 /******************************************************
1961 * Check for a given header in a header string *
1962 ******************************************************/
1964 /* This function is used when generating quota warnings. The configuration may
1965 specify any header lines it likes in quota_warn_message. If certain of them are
1966 missing, defaults are inserted, so we need to be able to test for the presence
1970 hdr the required header name
1971 hstring the header string
1973 Returns: TRUE the header is in the string
1974 FALSE the header is not in the string
1978 contains_header(uschar *hdr, uschar *hstring)
1980 int len = Ustrlen(hdr);
1981 uschar *p = hstring;
1984 if (strncmpic(p, hdr, len) == 0)
1987 while (*p == ' ' || *p == '\t') p++;
1988 if (*p == ':') return TRUE;
1990 while (*p != 0 && *p != '\n') p++;
1991 if (*p == '\n') p++;
1999 /*************************************************
2000 * Perform a local delivery *
2001 *************************************************/
2003 /* Each local delivery is performed in a separate process which sets its
2004 uid and gid as specified. This is a safer way than simply changing and
2005 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
2006 used safely. From release 4, Exim no longer makes any use of it. Besides, not
2007 all systems have seteuid().
2009 If the uid/gid are specified in the transport_instance, they are used; the
2010 transport initialization must ensure that either both or neither are set.
2011 Otherwise, the values associated with the address are used. If neither are set,
2012 it is a configuration error.
2014 The transport or the address may specify a home directory (transport over-
2015 rides), and if they do, this is set as $home. If neither have set a working
2016 directory, this value is used for that as well. Otherwise $home is left unset
2017 and the cwd is set to "/" - a directory that should be accessible to all users.
2019 Using a separate process makes it more complicated to get error information
2020 back. We use a pipe to pass the return code and also an error code and error
2021 text string back to the parent process.
2024 addr points to an address block for this delivery; for "normal" local
2025 deliveries this is the only address to be delivered, but for
2026 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
2027 a number of addresses can be handled simultaneously, and in this
2028 case addr will point to a chain of addresses with the same
2031 shadowing TRUE if running a shadow transport; this causes output from pipes
2038 deliver_local(address_item *addr, BOOL shadowing)
2040 BOOL use_initgroups;
2043 int status, len, rc;
2046 uschar *working_directory;
2047 address_item *addr2;
2048 transport_instance *tp = addr->transport;
2050 /* Set up the return path from the errors or sender address. If the transport
2051 has its own return path setting, expand it and replace the existing value. */
2053 if(addr->prop.errors_address)
2054 return_path = addr->prop.errors_address;
2055 #ifdef EXPERIMENTAL_SRS
2056 else if (addr->prop.srs_sender)
2057 return_path = addr->prop.srs_sender;
2060 return_path = sender_address;
2062 if (tp->return_path)
2064 uschar *new_return_path = expand_string(tp->return_path);
2065 if (!new_return_path)
2067 if (!expand_string_forcedfail)
2069 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
2070 US"Failed to expand return path \"%s\" in %s transport: %s",
2071 tp->return_path, tp->name, expand_string_message);
2075 else return_path = new_return_path;
2078 /* For local deliveries, one at a time, the value used for logging can just be
2079 set directly, once and for all. */
2081 used_return_path = return_path;
2083 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
2084 gets put into the address(es), and the expansions are unset, so we can just
2087 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
2089 /* See if either the transport or the address specifies a home directory. A
2090 home directory set in the address may already be expanded; a flag is set to
2091 indicate that. In other cases we must expand it. */
2093 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
2094 || ( (deliver_home = addr->home_dir) /* Set in address and */
2095 && !testflag(addr, af_home_expanded) /* not expanded */
2098 uschar *rawhome = deliver_home;
2099 deliver_home = NULL; /* in case it contains $home */
2100 if (!(deliver_home = expand_string(rawhome)))
2102 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
2103 "to expand for %s transport: %s", rawhome, tp->name,
2104 expand_string_message);
2107 if (*deliver_home != '/')
2109 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
2110 "is not absolute for %s transport", deliver_home, tp->name);
2115 /* See if either the transport or the address specifies a current directory,
2116 and if so, expand it. If nothing is set, use the home directory, unless it is
2117 also unset in which case use "/", which is assumed to be a directory to which
2118 all users have access. It is necessary to be in a visible directory for some
2119 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
2120 2.5) require this. */
2122 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
2123 if (working_directory)
2125 uschar *raw = working_directory;
2126 if (!(working_directory = expand_string(raw)))
2128 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
2129 "failed to expand for %s transport: %s", raw, tp->name,
2130 expand_string_message);
2133 if (*working_directory != '/')
2135 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
2136 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
2140 else working_directory = deliver_home ? deliver_home : US"/";
2142 /* If one of the return_output flags is set on the transport, create and open a
2143 file in the message log directory for the transport to write its output onto.
2144 This is mainly used by pipe transports. The file needs to be unique to the
2145 address. This feature is not available for shadow transports. */
2148 && ( tp->return_output || tp->return_fail_output
2149 || tp->log_output || tp->log_fail_output || tp->log_defer_output
2154 addr->return_filename =
2155 spool_fname(US"msglog", message_subdir, message_id,
2156 string_sprintf("-%d-%d", getpid(), return_count++));
2158 if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0)
2160 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
2161 "to return message: %s", error, tp->name, strerror(errno));
2166 /* Create the pipe for inter-process communication. */
2170 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
2175 /* Now fork the process to do the real work in the subprocess, but first
2176 ensure that all cached resources are freed so that the subprocess starts with
2177 a clean slate and doesn't interfere with the parent process. */
2181 if ((pid = fork()) == 0)
2183 BOOL replicate = TRUE;
2185 /* Prevent core dumps, as we don't want them in users' home directories.
2186 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
2187 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
2188 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
2189 complain if the error is "not supported".
2191 There are two scenarios where changing the max limit has an effect. In one,
2192 the user is using a .forward and invoking a command of their choice via pipe;
2193 for these, we do need the max limit to be 0 unless the admin chooses to
2194 permit an increased limit. In the other, the command is invoked directly by
2195 the transport and is under administrator control, thus being able to raise
2196 the limit aids in debugging. So there's no general always-right answer.
2198 Thus we inhibit core-dumps completely but let individual transports, while
2199 still root, re-raise the limits back up to aid debugging. We make the
2200 default be no core-dumps -- few enough people can use core dumps in
2201 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2208 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2210 # ifdef SETRLIMIT_NOT_SUPPORTED
2211 if (errno != ENOSYS && errno != ENOTSUP)
2213 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2218 /* Reset the random number generator, so different processes don't all
2219 have the same sequence. */
2223 /* If the transport has a setup entry, call this first, while still
2224 privileged. (Appendfile uses this to expand quota, for example, while
2225 able to read private files.) */
2227 if (addr->transport->setup)
2228 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2232 addr->transport_return = DEFER;
2236 addr->transport_return = PANIC;
2240 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2241 when the process becomes unprivileged, it won't be able to write to the
2242 process log. SIGHUP is ignored throughout exim, except when it is being
2245 signal(SIGINT, SIG_IGN);
2246 signal(SIGTERM, SIG_IGN);
2247 signal(SIGUSR1, SIG_IGN);
2249 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2250 half - for transports that exec things (e.g. pipe). Then set the required
2253 (void)close(pfd[pipe_read]);
2254 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2256 exim_setugid(uid, gid, use_initgroups,
2257 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2258 addr->address, addr->transport->name));
2262 address_item *batched;
2263 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2264 for (batched = addr->next; batched; batched = batched->next)
2265 debug_printf("additional batched address: %s\n", batched->address);
2268 /* Set an appropriate working directory. */
2270 if (Uchdir(working_directory) < 0)
2272 addr->transport_return = DEFER;
2273 addr->basic_errno = errno;
2274 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2277 /* If successful, call the transport */
2282 set_process_info("delivering %s to %s using %s", message_id,
2283 addr->local_part, addr->transport->name);
2285 /* Setting this global in the subprocess means we need never clear it */
2286 transport_name = addr->transport->name;
2288 /* If a transport filter has been specified, set up its argument list.
2289 Any errors will get put into the address, and FALSE yielded. */
2291 if (addr->transport->filter_command)
2293 ok = transport_set_up_command(&transport_filter_argv,
2294 addr->transport->filter_command,
2295 TRUE, PANIC, addr, US"transport filter", NULL);
2296 transport_filter_timeout = addr->transport->filter_timeout;
2298 else transport_filter_argv = NULL;
2302 debug_print_string(addr->transport->debug_string);
2303 replicate = !(addr->transport->info->code)(addr->transport, addr);
2307 /* Pass the results back down the pipe. If necessary, first replicate the
2308 status in the top address to the others in the batch. The label is the
2309 subject of a goto when a call to the transport's setup function fails. We
2310 pass the pointer to the transport back in case it got changed as a result of
2311 file_format in appendfile. */
2315 if (replicate) replicate_status(addr);
2316 for (addr2 = addr; addr2; addr2 = addr2->next)
2319 int local_part_length = Ustrlen(addr2->local_part);
2323 if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int)
2324 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2325 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2326 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2327 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2328 || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int)
2329 || (ret = write(pfd[pipe_write], &addr2->transport,
2330 sizeof(transport_instance *))) != sizeof(transport_instance *)
2332 /* For a file delivery, pass back the local part, in case the original
2333 was only part of the final delivery path. This gives more complete
2336 || (testflag(addr2, af_file)
2337 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2338 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2342 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2343 ret == -1 ? strerror(errno) : "short write");
2345 /* Now any messages */
2347 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2349 int message_length = s ? Ustrlen(s) + 1 : 0;
2350 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2351 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2353 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2354 ret == -1 ? strerror(errno) : "short write");
2358 /* OK, this process is now done. Free any cached resources that it opened,
2359 and close the pipe we were writing down before exiting. */
2361 (void)close(pfd[pipe_write]);
2366 /* Back in the main process: panic if the fork did not succeed. This seems
2367 better than returning an error - if forking is failing it is probably best
2368 not to try other deliveries for this message. */
2371 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2374 /* Read the pipe to get the delivery status codes and error messages. Our copy
2375 of the writing end must be closed first, as otherwise read() won't return zero
2376 on an empty pipe. We check that a status exists for each address before
2377 overwriting the address structure. If data is missing, the default DEFER status
2378 will remain. Afterwards, close the reading end. */
2380 (void)close(pfd[pipe_write]);
2382 for (addr2 = addr; addr2; addr2 = addr2->next)
2384 len = read(pfd[pipe_read], &status, sizeof(int));
2390 addr2->transport_return = status;
2391 len = read(pfd[pipe_read], &transport_count,
2392 sizeof(transport_count));
2393 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2394 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2395 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2396 len = read(pfd[pipe_read], &addr2->special_action, sizeof(int));
2397 len = read(pfd[pipe_read], &addr2->transport,
2398 sizeof(transport_instance *));
2400 if (testflag(addr2, af_file))
2402 int local_part_length;
2403 len = read(pfd[pipe_read], &local_part_length, sizeof(int));
2404 len = read(pfd[pipe_read], big_buffer, local_part_length);
2405 big_buffer[local_part_length] = 0;
2406 addr2->local_part = string_copy(big_buffer);
2409 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2412 len = read(pfd[pipe_read], &message_length, sizeof(int));
2413 if (message_length > 0)
2415 len = read(pfd[pipe_read], big_buffer, message_length);
2416 big_buffer[big_buffer_size-1] = '\0'; /* guard byte */
2417 if (len > 0) *sptr = string_copy(big_buffer);
2424 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2425 "from delivery subprocess", addr2->unique);
2430 (void)close(pfd[pipe_read]);
2432 /* Unless shadowing, write all successful addresses immediately to the journal
2433 file, to ensure they are recorded asap. For homonymic addresses, use the base
2434 address plus the transport name. Failure to write the journal is panic-worthy,
2435 but don't stop, as it may prove possible subsequently to update the spool file
2436 in order to record the delivery. */
2440 for (addr2 = addr; addr2; addr2 = addr2->next)
2441 if (addr2->transport_return == OK)
2443 if (testflag(addr2, af_homonym))
2444 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2446 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2448 /* In the test harness, wait just a bit to let the subprocess finish off
2449 any debug output etc first. */
2451 if (running_in_test_harness) millisleep(300);
2453 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2454 len = Ustrlen(big_buffer);
2455 if (write(journal_fd, big_buffer, len) != len)
2456 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2457 big_buffer, strerror(errno));
2460 /* Ensure the journal file is pushed out to disk. */
2462 if (EXIMfsync(journal_fd) < 0)
2463 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2467 /* Wait for the process to finish. If it terminates with a non-zero code,
2468 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2469 status values of all the addresses as they are. Take care to handle the case
2470 when the subprocess doesn't seem to exist. This has been seen on one system
2471 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2472 happens, wait() doesn't recognize the termination of child processes. Exim now
2473 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2475 while ((rc = wait(&status)) != pid)
2476 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2478 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2479 addr->transport->driver_name);
2484 if ((status & 0xffff) != 0)
2486 int msb = (status >> 8) & 255;
2487 int lsb = status & 255;
2488 int code = (msb == 0)? (lsb & 0x7f) : msb;
2489 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2490 addr->special_action = SPECIAL_FREEZE;
2491 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2492 "status 0x%04x: %s %d",
2493 addr->transport->driver_name,
2495 msb == 0 ? "terminated by signal" : "exit code",
2499 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2501 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2504 uschar *warn_message;
2507 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2509 if (!(warn_message = expand_string(addr->transport->warn_message)))
2510 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2511 "message for %s transport): %s", addr->transport->warn_message,
2512 addr->transport->name, expand_string_message);
2514 else if ((pid = child_open_exim(&fd)) > 0)
2516 FILE *f = fdopen(fd, "wb");
2517 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2518 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2519 fprintf(f, "Auto-Submitted: auto-replied\n");
2520 if (!contains_header(US"From", warn_message))
2522 fprintf(f, "%s", CS warn_message);
2524 /* Close and wait for child process to complete, without a timeout. */
2527 (void)child_close(pid, 0);
2530 addr->special_action = SPECIAL_NONE;
2537 /* Check transport for the given concurrency limit. Return TRUE if over
2538 the limit (or an expansion failure), else FALSE and if there was a limit,
2539 the key for the hints database used for the concurrency count. */
2542 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2544 unsigned max_parallel;
2546 if (!tp->max_parallel) return FALSE;
2548 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2549 if (expand_string_message)
2551 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2552 "in %s transport (%s): %s", tp->name, addr->address,
2553 expand_string_message);
2557 if (max_parallel > 0)
2559 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2560 if (!enq_start(serialize_key, max_parallel))
2562 address_item * next;
2564 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2565 tp->name, max_parallel);
2569 addr->message = US"concurrency limit reached for transport";
2570 addr->basic_errno = ERRNO_TRETRY;
2571 post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
2572 } while ((addr = next));
2575 *key = serialize_key;
2582 /*************************************************
2583 * Do local deliveries *
2584 *************************************************/
2586 /* This function processes the list of addresses in addr_local. True local
2587 deliveries are always done one address at a time. However, local deliveries can
2588 be batched up in some cases. Typically this is when writing batched SMTP output
2589 files for use by some external transport mechanism, or when running local
2590 deliveries over LMTP.
2597 do_local_deliveries(void)
2600 open_db *dbm_file = NULL;
2601 time_t now = time(NULL);
2603 /* Loop until we have exhausted the supply of local deliveries */
2607 time_t delivery_start;
2609 address_item *addr2, *addr3, *nextaddr;
2610 int logflags = LOG_MAIN;
2611 int logchar = dont_deliver? '*' : '=';
2612 transport_instance *tp;
2613 uschar * serialize_key = NULL;
2615 /* Pick the first undelivered address off the chain */
2617 address_item *addr = addr_local;
2618 addr_local = addr->next;
2621 DEBUG(D_deliver|D_transport)
2622 debug_printf("--------> %s <--------\n", addr->address);
2624 /* An internal disaster if there is no transport. Should not occur! */
2626 if (!(tp = addr->transport))
2628 logflags |= LOG_PANIC;
2629 disable_logging = FALSE; /* Jic */
2630 addr->message = addr->router
2631 ? string_sprintf("No transport set by %s router", addr->router->name)
2632 : string_sprintf("No transport set by system filter");
2633 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2637 /* Check that this base address hasn't previously been delivered to this
2638 transport. The check is necessary at this point to handle homonymic addresses
2639 correctly in cases where the pattern of redirection changes between delivery
2640 attempts. Non-homonymic previous delivery is detected earlier, at routing
2643 if (previously_transported(addr, FALSE)) continue;
2645 /* There are weird cases where logging is disabled */
2647 disable_logging = tp->disable_logging;
2649 /* Check for batched addresses and possible amalgamation. Skip all the work
2650 if either batch_max <= 1 or there aren't any other addresses for local
2653 if (tp->batch_max > 1 && addr_local)
2655 int batch_count = 1;
2656 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2657 BOOL uses_lp = ( testflag(addr, af_pfr)
2658 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2660 || readconf_depends((driver_instance *)tp, US"local_part");
2661 uschar *batch_id = NULL;
2662 address_item **anchor = &addr_local;
2663 address_item *last = addr;
2666 /* Expand the batch_id string for comparison with other addresses.
2667 Expansion failure suppresses batching. */
2671 deliver_set_expansions(addr);
2672 batch_id = expand_string(tp->batch_id);
2673 deliver_set_expansions(NULL);
2676 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2677 "in %s transport (%s): %s", tp->name, addr->address,
2678 expand_string_message);
2679 batch_count = tp->batch_max;
2683 /* Until we reach the batch_max limit, pick off addresses which have the
2684 same characteristics. These are:
2687 not previously delivered (see comment about 50 lines above)
2688 same local part if the transport's configuration contains $local_part
2689 or if this is a file or pipe delivery from a redirection
2690 same domain if the transport's configuration contains $domain
2692 same additional headers
2693 same headers to be removed
2694 same uid/gid for running the transport
2695 same first host if a host list is set
2698 while ((next = *anchor) && batch_count < tp->batch_max)
2701 tp == next->transport
2702 && !previously_transported(next, TRUE)
2703 && (addr->flags & (af_pfr|af_file)) == (next->flags & (af_pfr|af_file))
2704 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2705 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2706 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2707 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2708 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2709 && same_ugid(tp, addr, next)
2710 && ( !addr->host_list && !next->host_list
2713 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2716 /* If the transport has a batch_id setting, batch_id will be non-NULL
2717 from the expansion outside the loop. Expand for this address and compare.
2718 Expansion failure makes this address ineligible for batching. */
2723 address_item *save_nextnext = next->next;
2724 next->next = NULL; /* Expansion for a single address */
2725 deliver_set_expansions(next);
2726 next->next = save_nextnext;
2727 bid = expand_string(tp->batch_id);
2728 deliver_set_expansions(NULL);
2731 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2732 "in %s transport (%s): %s", tp->name, next->address,
2733 expand_string_message);
2736 else ok = (Ustrcmp(batch_id, bid) == 0);
2739 /* Take address into batch if OK. */
2743 *anchor = next->next; /* Include the address */
2749 else anchor = &next->next; /* Skip the address */
2753 /* We now have one or more addresses that can be delivered in a batch. Check
2754 whether the transport is prepared to accept a message of this size. If not,
2755 fail them all forthwith. If the expansion fails, or does not yield an
2756 integer, defer delivery. */
2758 if (tp->message_size_limit)
2760 int rc = check_message_size(tp, addr);
2763 replicate_status(addr);
2767 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2770 continue; /* With next batch of addresses */
2774 /* If we are not running the queue, or if forcing, all deliveries will be
2775 attempted. Otherwise, we must respect the retry times for each address. Even
2776 when not doing this, we need to set up the retry key string, and determine
2777 whether a retry record exists, because after a successful delivery, a delete
2778 retry item must be set up. Keep the retry database open only for the duration
2779 of these checks, rather than for all local deliveries, because some local
2780 deliveries (e.g. to pipes) can take a substantial time. */
2782 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
2784 DEBUG(D_deliver|D_retry|D_hints_lookup)
2785 debug_printf("no retry data available\n");
2792 BOOL ok = TRUE; /* to deliver this address */
2795 /* Set up the retry key to include the domain or not, and change its
2796 leading character from "R" to "T". Must make a copy before doing this,
2797 because the old key may be pointed to from a "delete" retry item after
2800 retry_key = string_copy(
2801 tp->retry_use_local_part ? addr2->address_retry_key :
2802 addr2->domain_retry_key);
2805 /* Inspect the retry data. If there is no hints file, delivery happens. */
2809 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2811 /* If there is no retry record, delivery happens. If there is,
2812 remember it exists so it can be deleted after a successful delivery. */
2816 setflag(addr2, af_lt_retry_exists);
2818 /* A retry record exists for this address. If queue running and not
2819 forcing, inspect its contents. If the record is too old, or if its
2820 retry time has come, or if it has passed its cutoff time, delivery
2825 debug_printf("retry record exists: age=%s ",
2826 readconf_printtime(now - retry_record->time_stamp));
2827 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2828 debug_printf(" time to retry = %s expired = %d\n",
2829 readconf_printtime(retry_record->next_try - now),
2830 retry_record->expired);
2833 if (queue_running && !deliver_force)
2835 ok = (now - retry_record->time_stamp > retry_data_expire)
2836 || (now >= retry_record->next_try)
2837 || retry_record->expired;
2839 /* If we haven't reached the retry time, there is one more check
2840 to do, which is for the ultimate address timeout. */
2843 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2847 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2850 /* This address is to be delivered. Leave it on the chain. */
2855 addr2 = addr2->next;
2858 /* This address is to be deferred. Take it out of the chain, and
2859 post-process it as complete. Must take it out of the chain first,
2860 because post processing puts it on another chain. */
2864 address_item *this = addr2;
2865 this->message = US"Retry time not yet reached";
2866 this->basic_errno = ERRNO_LRETRY;
2867 addr2 = addr3 ? (addr3->next = addr2->next)
2868 : (addr = addr2->next);
2869 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2873 if (dbm_file) dbfn_close(dbm_file);
2875 /* If there are no addresses left on the chain, they all deferred. Loop
2876 for the next set of addresses. */
2878 if (!addr) continue;
2880 /* If the transport is limited for parallellism, enforce that here.
2881 We use a hints DB entry, incremented here and decremented after
2882 the transport (and any shadow transport) completes. */
2884 if (tpt_parallel_check(tp, addr, &serialize_key))
2886 if (expand_string_message)
2888 logflags |= LOG_PANIC;
2892 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2893 } while ((addr = addr2));
2895 continue; /* Loop for the next set of addresses. */
2899 /* So, finally, we do have some addresses that can be passed to the
2900 transport. Before doing so, set up variables that are relevant to a
2903 deliver_set_expansions(addr);
2904 delivery_start = time(NULL);
2905 deliver_local(addr, FALSE);
2906 deliver_time = (int)(time(NULL) - delivery_start);
2908 /* If a shadow transport (which must perforce be another local transport), is
2909 defined, and its condition is met, we must pass the message to the shadow
2910 too, but only those addresses that succeeded. We do this by making a new
2911 chain of addresses - also to keep the original chain uncontaminated. We must
2912 use a chain rather than doing it one by one, because the shadow transport may
2915 NOTE: if the condition fails because of a lookup defer, there is nothing we
2919 && ( !tp->shadow_condition
2920 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
2923 transport_instance *stp;
2924 address_item *shadow_addr = NULL;
2925 address_item **last = &shadow_addr;
2927 for (stp = transports; stp; stp = stp->next)
2928 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
2931 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
2934 /* Pick off the addresses that have succeeded, and make clones. Put into
2935 the shadow_message field a pointer to the shadow_message field of the real
2938 else for (addr2 = addr; addr2; addr2 = addr2->next)
2939 if (addr2->transport_return == OK)
2941 addr3 = store_get(sizeof(address_item));
2944 addr3->shadow_message = (uschar *) &(addr2->shadow_message);
2945 addr3->transport = stp;
2946 addr3->transport_return = DEFER;
2947 addr3->return_filename = NULL;
2948 addr3->return_file = -1;
2950 last = &(addr3->next);
2953 /* If we found any addresses to shadow, run the delivery, and stick any
2954 message back into the shadow_message field in the original. */
2958 int save_count = transport_count;
2960 DEBUG(D_deliver|D_transport)
2961 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2962 deliver_local(shadow_addr, TRUE);
2964 for(; shadow_addr; shadow_addr = shadow_addr->next)
2966 int sresult = shadow_addr->transport_return;
2967 *(uschar **)shadow_addr->shadow_message =
2969 ? string_sprintf(" ST=%s", stp->name)
2970 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
2971 shadow_addr->basic_errno <= 0
2973 : US strerror(shadow_addr->basic_errno),
2974 shadow_addr->basic_errno <= 0 || !shadow_addr->message
2977 shadow_addr->message
2978 ? shadow_addr->message
2979 : shadow_addr->basic_errno <= 0
2983 DEBUG(D_deliver|D_transport)
2984 debug_printf("%s shadow transport returned %s for %s\n",
2986 sresult == OK ? "OK" :
2987 sresult == DEFER ? "DEFER" :
2988 sresult == FAIL ? "FAIL" :
2989 sresult == PANIC ? "PANIC" : "?",
2990 shadow_addr->address);
2993 DEBUG(D_deliver|D_transport)
2994 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2996 transport_count = save_count; /* Restore original transport count */
3000 /* Cancel the expansions that were set up for the delivery. */
3002 deliver_set_expansions(NULL);
3004 /* If the transport was parallelism-limited, decrement the hints DB record. */
3006 if (serialize_key) enq_end(serialize_key);
3008 /* Now we can process the results of the real transport. We must take each
3009 address off the chain first, because post_process_one() puts it on another
3012 for (addr2 = addr; addr2; addr2 = nextaddr)
3014 int result = addr2->transport_return;
3015 nextaddr = addr2->next;
3017 DEBUG(D_deliver|D_transport)
3018 debug_printf("%s transport returned %s for %s\n",
3020 result == OK ? "OK" :
3021 result == DEFER ? "DEFER" :
3022 result == FAIL ? "FAIL" :
3023 result == PANIC ? "PANIC" : "?",
3026 /* If there is a retry_record, or if delivery is deferred, build a retry
3027 item for setting a new retry time or deleting the old retry record from
3028 the database. These items are handled all together after all addresses
3029 have been handled (so the database is open just for a short time for
3032 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
3034 int flags = result == DEFER ? 0 : rf_delete;
3035 uschar *retry_key = string_copy(tp->retry_use_local_part
3036 ? addr2->address_retry_key : addr2->domain_retry_key);
3038 retry_add_item(addr2, retry_key, flags);
3041 /* Done with this address */
3043 if (result == OK) addr2->more_errno = deliver_time;
3044 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
3046 /* If a pipe delivery generated text to be sent back, the result may be
3047 changed to FAIL, and we must copy this for subsequent addresses in the
3050 if (addr2->transport_return != result)
3052 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
3054 addr3->transport_return = addr2->transport_return;
3055 addr3->basic_errno = addr2->basic_errno;
3056 addr3->message = addr2->message;
3058 result = addr2->transport_return;
3061 /* Whether or not the result was changed to FAIL, we need to copy the
3062 return_file value from the first address into all the addresses of the
3063 batch, so they are all listed in the error message. */
3065 addr2->return_file = addr->return_file;
3067 /* Change log character for recording successful deliveries. */
3069 if (result == OK) logchar = '-';
3071 } /* Loop back for next batch of addresses */
3077 /*************************************************
3078 * Sort remote deliveries *
3079 *************************************************/
3081 /* This function is called if remote_sort_domains is set. It arranges that the
3082 chain of addresses for remote deliveries is ordered according to the strings
3083 specified. Try to make this shuffling reasonably efficient by handling
3084 sequences of addresses rather than just single ones.
3091 sort_remote_deliveries(void)
3094 address_item **aptr = &addr_remote;
3095 const uschar *listptr = remote_sort_domains;
3100 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
3103 address_item *moved = NULL;
3104 address_item **bptr = &moved;
3108 address_item **next;
3109 deliver_domain = (*aptr)->domain; /* set $domain */
3110 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3111 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
3113 aptr = &(*aptr)->next;
3117 next = &(*aptr)->next;
3119 && (deliver_domain = (*next)->domain, /* Set $domain */
3120 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
3121 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
3123 next = &(*next)->next;
3125 /* If the batch of non-matchers is at the end, add on any that were
3126 extracted further up the chain, and end this iteration. Otherwise,
3127 extract them from the chain and hang on the moved chain. */
3139 aptr = &(*aptr)->next;
3142 /* If the loop ended because the final address matched, *aptr will
3143 be NULL. Add on to the end any extracted non-matching addresses. If
3144 *aptr is not NULL, the loop ended via "break" when *next is null, that
3145 is, there was a string of non-matching addresses at the end. In this
3146 case the extracted addresses have already been added on the end. */
3148 if (!*aptr) *aptr = moved;
3154 debug_printf("remote addresses after sorting:\n");
3155 for (addr = addr_remote; addr; addr = addr->next)
3156 debug_printf(" %s\n", addr->address);
3162 /*************************************************
3163 * Read from pipe for remote delivery subprocess *
3164 *************************************************/
3166 /* This function is called when the subprocess is complete, but can also be
3167 called before it is complete, in order to empty a pipe that is full (to prevent
3168 deadlock). It must therefore keep track of its progress in the parlist data
3171 We read the pipe to get the delivery status codes and a possible error message
3172 for each address, optionally preceded by unusability data for the hosts and
3173 also by optional retry data.
3175 Read in large chunks into the big buffer and then scan through, interpreting
3176 the data therein. In most cases, only a single read will be necessary. No
3177 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
3178 that we read the next chunk when there is less than 2500 bytes left in the
3179 non-final chunk, we can assume each item is complete in the buffer before
3180 handling it. Each item is written using a single write(), which is atomic for
3181 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
3182 often bigger) so even if we are reading while the subprocess is still going, we
3183 should never have only a partial item in the buffer.
3186 poffset the offset of the parlist item
3187 eop TRUE if the process has completed
3189 Returns: TRUE if the terminating 'Z' item has been read,
3190 or there has been a disaster (i.e. no more data needed);
3195 par_read_pipe(int poffset, BOOL eop)
3198 pardata *p = parlist + poffset;
3199 address_item *addrlist = p->addrlist;
3200 address_item *addr = p->addr;
3203 uschar *endptr = big_buffer;
3204 uschar *ptr = endptr;
3205 uschar *msg = p->msg;
3206 BOOL done = p->done;
3207 BOOL unfinished = TRUE;
3208 /* minimum size to read is header size including id, subid and length */
3209 int required = PIPE_HEADER_SIZE;
3211 /* Loop through all items, reading from the pipe when necessary. The pipe
3212 is set up to be non-blocking, but there are two different Unix mechanisms in
3213 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
3214 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
3215 which returns 0 for both end of file and no more data. We distinguish the
3216 two cases by taking 0 as end of file only when we know the process has
3219 Each separate item is written to the pipe in a single write(), and as they are
3220 all short items, the writes will all be atomic and we should never find
3221 ourselves in the position of having read an incomplete item. "Short" in this
3222 case can mean up to about 1K in the case when there is a long error message
3223 associated with an address. */
3225 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3226 (int)p->pid, eop? "ended" : "not ended");
3230 retry_item *r, **rp;
3231 int remaining = endptr - ptr;
3232 uschar header[PIPE_HEADER_SIZE + 1];
3236 /* Read (first time) or top up the chars in the buffer if necessary.
3237 There will be only one read if we get all the available data (i.e. don't
3238 fill the buffer completely). */
3240 if (remaining < required && unfinished)
3243 int available = big_buffer_size - remaining;
3245 if (remaining > 0) memmove(big_buffer, ptr, remaining);
3248 endptr = big_buffer + remaining;
3249 len = read(fd, endptr, available);
3251 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
3253 /* If the result is EAGAIN and the process is not complete, just
3254 stop reading any more and process what we have already. */
3258 if (!eop && errno == EAGAIN) len = 0; else
3260 msg = string_sprintf("failed to read pipe from transport process "
3261 "%d for transport %s: %s", pid, addr->transport->driver_name,
3267 /* If the length is zero (eof or no-more-data), just process what we
3268 already have. Note that if the process is still running and we have
3269 read all the data in the pipe (but less that "available") then we
3270 won't read any more, as "unfinished" will get set FALSE. */
3274 unfinished = len == available;
3277 /* If we are at the end of the available data, exit the loop. */
3278 if (ptr >= endptr) break;
3280 /* copy and read header */
3281 memcpy(header, ptr, PIPE_HEADER_SIZE);
3282 header[PIPE_HEADER_SIZE] = '\0';
3285 required = Ustrtol(header + 2, &endc, 10) + PIPE_HEADER_SIZE; /* header + data */
3288 msg = string_sprintf("failed to read pipe from transport process "
3289 "%d for transport %s: error reading size from header", pid, addr->transport->driver_name);
3295 debug_printf("header read id:%c,subid:%c,size:%s,required:%d,remaining:%d,unfinished:%d\n",
3296 id, subid, header+2, required, remaining, unfinished);
3298 /* is there room for the dataset we want to read ? */
3299 if (required > big_buffer_size - PIPE_HEADER_SIZE)
3301 msg = string_sprintf("failed to read pipe from transport process "
3302 "%d for transport %s: big_buffer too small! required size=%d buffer size=%d", pid, addr->transport->driver_name,
3303 required, big_buffer_size - PIPE_HEADER_SIZE);
3308 /* we wrote all datasets with atomic write() calls
3309 remaining < required only happens if big_buffer was too small
3310 to get all available data from pipe. unfinished has to be true
3312 if (remaining < required)
3316 msg = string_sprintf("failed to read pipe from transport process "
3317 "%d for transport %s: required size=%d > remaining size=%d and unfinished=false",
3318 pid, addr->transport->driver_name, required, remaining);
3323 /* step behind the header */
3324 ptr += PIPE_HEADER_SIZE;
3326 /* Handle each possible type of item, assuming the complete item is
3327 available in store. */
3331 /* Host items exist only if any hosts were marked unusable. Match
3332 up by checking the IP address. */
3335 for (h = addrlist->host_list; h; h = h->next)
3337 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3345 /* Retry items are sent in a preceding R item for each address. This is
3346 kept separate to keep each message short enough to guarantee it won't
3347 be split in the pipe. Hopefully, in the majority of cases, there won't in
3348 fact be any retry items at all.
3350 The complete set of retry items might include an item to delete a
3351 routing retry if there was a previous routing delay. However, routing
3352 retries are also used when a remote transport identifies an address error.
3353 In that case, there may also be an "add" item for the same key. Arrange
3354 that a "delete" item is dropped in favour of an "add" item. */
3357 if (!addr) goto ADDR_MISMATCH;
3359 DEBUG(D_deliver|D_retry)
3360 debug_printf("reading retry information for %s from subprocess\n",
3363 /* Cut out any "delete" items on the list. */
3365 for (rp = &(addr->retries); (r = *rp); rp = &r->next)
3366 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3368 if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */
3369 *rp = r->next; /* Excise a delete item */
3370 DEBUG(D_deliver|D_retry)
3371 debug_printf(" existing delete item dropped\n");
3374 /* We want to add a delete item only if there is no non-delete item;
3375 however we still have to step ptr through the data. */
3377 if (!r || (*ptr & rf_delete) == 0)
3379 r = store_get(sizeof(retry_item));
3380 r->next = addr->retries;
3383 r->key = string_copy(ptr);
3385 memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno));
3386 ptr += sizeof(r->basic_errno);
3387 memcpy(&(r->more_errno), ptr, sizeof(r->more_errno));
3388 ptr += sizeof(r->more_errno);
3389 r->message = (*ptr)? string_copy(ptr) : NULL;
3390 DEBUG(D_deliver|D_retry)
3391 debug_printf(" added %s item\n",
3392 ((r->flags & rf_delete) == 0)? "retry" : "delete");
3397 DEBUG(D_deliver|D_retry)
3398 debug_printf(" delete item not added: non-delete item exists\n");
3401 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3407 /* Put the amount of data written into the parlist block */
3410 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3411 ptr += sizeof(transport_count);
3414 /* Address items are in the order of items on the address chain. We
3415 remember the current address value in case this function is called
3416 several times to empty the pipe in stages. Information about delivery
3417 over TLS is sent in a preceding X item for each address. We don't put
3418 it in with the other info, in order to keep each message short enough to
3419 guarantee it won't be split in the pipe. */
3423 if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3427 addr->cipher = NULL;
3428 addr->peerdn = NULL;
3431 addr->cipher = string_copy(ptr);
3434 addr->peerdn = string_copy(ptr);
3439 (void) tls_import_cert(ptr, &addr->peercert);
3441 addr->peercert = NULL;
3446 (void) tls_import_cert(ptr, &addr->ourcert);
3448 addr->ourcert = NULL;
3451 # ifndef DISABLE_OCSP
3453 addr->ocsp = OCSP_NOT_REQ;
3455 addr->ocsp = *ptr - '0';
3461 #endif /*SUPPORT_TLS*/
3463 case 'C': /* client authenticator information */
3467 addr->authenticator = (*ptr)? string_copy(ptr) : NULL;
3470 addr->auth_id = (*ptr)? string_copy(ptr) : NULL;
3473 addr->auth_sndr = (*ptr)? string_copy(ptr) : NULL;
3479 #ifndef DISABLE_PRDR
3481 addr->flags |= af_prdr_used;
3486 if (!addr) goto ADDR_MISMATCH;
3487 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3488 ptr += sizeof(addr->dsn_aware);
3489 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3496 msg = string_sprintf("address count mismatch for data read from pipe "
3497 "for transport process %d for transport %s", pid,
3498 addrlist->transport->driver_name);
3505 #ifdef SUPPORT_SOCKS
3506 case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/
3507 proxy_session = TRUE; /*XXX shouod this be cleared somewhere? */
3512 proxy_local_address = string_copy(ptr);
3514 memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port));
3515 ptr += sizeof(proxy_local_port);
3520 #ifdef EXPERIMENTAL_DSN_INFO
3521 case '1': /* must arrive before A0, and applies to that addr */
3522 /* Two strings: smtp_greeting and helo_response */
3523 addr->smtp_greeting = string_copy(ptr);
3525 addr->helo_response = string_copy(ptr);
3531 addr->transport_return = *ptr++;
3532 addr->special_action = *ptr++;
3533 memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno));
3534 ptr += sizeof(addr->basic_errno);
3535 memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno));
3536 ptr += sizeof(addr->more_errno);
3537 memcpy(&(addr->flags), ptr, sizeof(addr->flags));
3538 ptr += sizeof(addr->flags);
3539 addr->message = (*ptr)? string_copy(ptr) : NULL;
3541 addr->user_message = (*ptr)? string_copy(ptr) : NULL;
3544 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3548 h = store_get(sizeof(host_item));
3549 h->name = string_copy(ptr);
3551 h->address = string_copy(ptr);
3553 memcpy(&(h->port), ptr, sizeof(h->port));
3554 ptr += sizeof(h->port);
3555 h->dnssec = *ptr == '2' ? DS_YES
3556 : *ptr == '1' ? DS_NO
3559 addr->host_used = h;
3563 /* Finished with this address */
3570 /* Local interface address/port */
3572 if (*ptr) sending_ip_address = string_copy(ptr);
3574 if (*ptr) sending_port = atoi(CS ptr);
3578 /* Z marks the logical end of the data. It is followed by '0' if
3579 continue_transport was NULL at the end of transporting, otherwise '1'.
3580 We need to know when it becomes NULL during a delivery down a passed SMTP
3581 channel so that we don't try to pass anything more down it. Of course, for
3582 most normal messages it will remain NULL all the time. */
3587 continue_transport = NULL;
3588 continue_hostname = NULL;
3591 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3594 /* Anything else is a disaster. */
3597 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3598 "process %d for transport %s", ptr[-1], pid,
3599 addr->transport->driver_name);
3605 /* The done flag is inspected externally, to determine whether or not to
3606 call the function again when the process finishes. */
3610 /* If the process hadn't finished, and we haven't seen the end of the data
3611 or suffered a disaster, update the rest of the state, and return FALSE to
3612 indicate "not finished". */
3621 /* Close our end of the pipe, to prevent deadlock if the far end is still
3622 pushing stuff into it. */
3627 /* If we have finished without error, but haven't had data for every address,
3628 something is wrong. */
3631 msg = string_sprintf("insufficient address data read from pipe "
3632 "for transport process %d for transport %s", pid,
3633 addr->transport->driver_name);
3635 /* If an error message is set, something has gone wrong in getting back
3636 the delivery data. Put the message into each address and freeze it. */
3639 for (addr = addrlist; addr; addr = addr->next)
3641 addr->transport_return = DEFER;
3642 addr->special_action = SPECIAL_FREEZE;
3643 addr->message = msg;
3646 /* Return TRUE to indicate we have got all we need from this process, even
3647 if it hasn't actually finished yet. */
3654 /*************************************************
3655 * Post-process a set of remote addresses *
3656 *************************************************/
3658 /* Do what has to be done immediately after a remote delivery for each set of
3659 addresses, then re-write the spool if necessary. Note that post_process_one
3660 puts the address on an appropriate queue; hence we must fish off the next
3661 one first. This function is also called if there is a problem with setting
3662 up a subprocess to do a remote delivery in parallel. In this case, the final
3663 argument contains a message, and the action must be forced to DEFER.
3666 addr pointer to chain of address items
3667 logflags flags for logging
3668 msg NULL for normal cases; -> error message for unexpected problems
3669 fallback TRUE if processing fallback hosts
3675 remote_post_process(address_item *addr, int logflags, uschar *msg,
3680 /* If any host addresses were found to be unusable, add them to the unusable
3681 tree so that subsequent deliveries don't try them. */
3683 for (h = addr->host_list; h; h = h->next)
3685 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3687 /* Now handle each address on the chain. The transport has placed '=' or '-'
3688 into the special_action field for each successful delivery. */
3692 address_item *next = addr->next;
3694 /* If msg == NULL (normal processing) and the result is DEFER and we are
3695 processing the main hosts and there are fallback hosts available, put the
3696 address on the list for fallback delivery. */
3698 if ( addr->transport_return == DEFER
3699 && addr->fallback_hosts
3704 addr->host_list = addr->fallback_hosts;
3705 addr->next = addr_fallback;
3706 addr_fallback = addr;
3707 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3710 /* If msg is set (=> unexpected problem), set it in the address before
3711 doing the ordinary post processing. */
3717 addr->message = msg;
3718 addr->transport_return = DEFER;
3720 (void)post_process_one(addr, addr->transport_return, logflags,
3721 DTYPE_TRANSPORT, addr->special_action);
3729 /* If we have just delivered down a passed SMTP channel, and that was
3730 the last address, the channel will have been closed down. Now that
3731 we have logged that delivery, set continue_sequence to 1 so that
3732 any subsequent deliveries don't get "*" incorrectly logged. */
3734 if (!continue_transport) continue_sequence = 1;
3739 /*************************************************
3740 * Wait for one remote delivery subprocess *
3741 *************************************************/
3743 /* This function is called while doing remote deliveries when either the
3744 maximum number of processes exist and we need one to complete so that another
3745 can be created, or when waiting for the last ones to complete. It must wait for
3746 the completion of one subprocess, empty the control block slot, and return a
3747 pointer to the address chain.
3750 Returns: pointer to the chain of addresses handled by the process;
3751 NULL if no subprocess found - this is an unexpected error
3754 static address_item *
3757 int poffset, status;
3758 address_item *addr, *addrlist;
3761 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3762 "to finish", message_id);
3764 /* Loop until either a subprocess completes, or there are no subprocesses in
3765 existence - in which case give an error return. We cannot proceed just by
3766 waiting for a completion, because a subprocess may have filled up its pipe, and
3767 be waiting for it to be emptied. Therefore, if no processes have finished, we
3768 wait for one of the pipes to acquire some data by calling select(), with a
3769 timeout just in case.
3771 The simple approach is just to iterate after reading data from a ready pipe.
3772 This leads to non-ideal behaviour when the subprocess has written its final Z
3773 item, closed the pipe, and is in the process of exiting (the common case). A
3774 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3775 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3778 To avoid this, if all the data that is needed has been read from a subprocess
3779 after select(), an explicit wait() for it is done. We know that all it is doing
3780 is writing to the pipe and then exiting, so the wait should not be long.
3782 The non-blocking waitpid() is to some extent just insurance; if we could
3783 reliably detect end-of-file on the pipe, we could always know when to do a
3784 blocking wait() for a completed process. However, because some systems use
3785 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3786 use code that functions without the need to recognize EOF.
3788 There's a double loop here just in case we end up with a process that is not in
3789 the list of remote delivery processes. Something has obviously gone wrong if
3790 this is the case. (For example, a process that is incorrectly left over from
3791 routing or local deliveries might be found.) The damage can be minimized by
3792 looping back and looking for another process. If there aren't any, the error
3793 return will happen. */
3795 for (;;) /* Normally we do not repeat this loop */
3797 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3800 fd_set select_pipes;
3801 int maxpipe, readycount;
3803 /* A return value of -1 can mean several things. If errno != ECHILD, it
3804 either means invalid options (which we discount), or that this process was
3805 interrupted by a signal. Just loop to try the waitpid() again.
3807 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3808 in existence. This should never happen, and is an unexpected error.
3809 However, there is a nasty complication when running under Linux. If "strace
3810 -f" is being used under Linux to trace this process and its children,
3811 subprocesses are "stolen" from their parents and become the children of the
3812 tracing process. A general wait such as the one we've just obeyed returns
3813 as if there are no children while subprocesses are running. Once a
3814 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3815 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3818 This does not happen using "truss" on Solaris, nor (I think) with other
3819 tracing facilities on other OS. It seems to be specific to Linux.
3821 What we do to get round this is to use kill() to see if any of our
3822 subprocesses are still in existence. If kill() gives an OK return, we know
3823 it must be for one of our processes - it can't be for a re-use of the pid,
3824 because if our process had finished, waitpid() would have found it. If any
3825 of our subprocesses are in existence, we proceed to use select() as if
3826 waitpid() had returned zero. I think this is safe. */
3830 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3833 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3834 "for process existence\n");
3836 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3838 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3840 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3841 "stolen by strace\n", (int)pid);
3842 break; /* With poffset set */
3846 if (poffset >= remote_max_parallel)
3848 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3849 return NULL; /* This is the error return */
3853 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3854 been handled above. A return value of zero means that there is at least one
3855 subprocess, but there are no completed subprocesses. See if any pipes are
3856 ready with any data for reading. */
3858 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3861 FD_ZERO(&select_pipes);
3862 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3864 if (parlist[poffset].pid != 0)
3866 int fd = parlist[poffset].fd;
3867 FD_SET(fd, &select_pipes);
3868 if (fd > maxpipe) maxpipe = fd;
3872 /* Stick in a 60-second timeout, just in case. */
3877 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3880 /* Scan through the pipes and read any that are ready; use the count
3881 returned by select() to stop when there are no more. Select() can return
3882 with no processes (e.g. if interrupted). This shouldn't matter.
3884 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3885 read, or there was a disaster. In either case, we are finished with this
3886 process. Do an explicit wait() for the process and break the main loop if
3889 It turns out that we have to deal with the case of an interrupted system
3890 call, which can happen on some operating systems if the signal handling is
3891 set up to do that by default. */
3894 readycount > 0 && poffset < remote_max_parallel;
3897 if ( (pid = parlist[poffset].pid) != 0
3898 && FD_ISSET(parlist[poffset].fd, &select_pipes)
3902 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3904 for (;;) /* Loop for signals */
3906 pid_t endedpid = waitpid(pid, &status, 0);
3907 if (endedpid == pid) goto PROCESS_DONE;
3908 if (endedpid != (pid_t)(-1) || errno != EINTR)
3909 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3910 "%d (errno = %d) from waitpid() for process %d",
3911 (int)endedpid, errno, (int)pid);
3917 /* Now go back and look for a completed subprocess again. */
3920 /* A completed process was detected by the non-blocking waitpid(). Find the
3921 data block that corresponds to this subprocess. */
3923 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3924 if (pid == parlist[poffset].pid) break;
3926 /* Found the data block; this is a known remote delivery process. We don't
3927 need to repeat the outer loop. This should be what normally happens. */
3929 if (poffset < remote_max_parallel) break;
3931 /* This situation is an error, but it's probably better to carry on looking
3932 for another process than to give up (as we used to do). */
3934 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
3935 "transport process list", pid);
3936 } /* End of the "for" loop */
3938 /* Come here when all the data was completely read after a select(), and
3939 the process in pid has been wait()ed for. */
3946 debug_printf("remote delivery process %d ended\n", (int)pid);
3948 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
3952 set_process_info("delivering %s", message_id);
3954 /* Get the chain of processed addresses */
3956 addrlist = parlist[poffset].addrlist;
3958 /* If the process did not finish cleanly, record an error and freeze (except
3959 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3960 in case the delivery did actually happen. */
3962 if ((status & 0xffff) != 0)
3965 int msb = (status >> 8) & 255;
3966 int lsb = status & 255;
3967 int code = (msb == 0)? (lsb & 0x7f) : msb;
3969 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
3971 addrlist->transport->driver_name,
3973 (msb == 0)? "terminated by signal" : "exit code",
3976 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
3977 addrlist->special_action = SPECIAL_FREEZE;
3979 for (addr = addrlist; addr; addr = addr->next)
3981 addr->transport_return = DEFER;
3982 addr->message = msg;
3985 remove_journal = FALSE;
3988 /* Else complete reading the pipe to get the result of the delivery, if all
3989 the data has not yet been obtained. */
3991 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
3993 /* Put the data count and return path into globals, mark the data slot unused,
3994 decrement the count of subprocesses, and return the address chain. */
3996 transport_count = parlist[poffset].transport_count;
3997 used_return_path = parlist[poffset].return_path;
3998 parlist[poffset].pid = 0;
4005 /*************************************************
4006 * Wait for subprocesses and post-process *
4007 *************************************************/
4009 /* This function waits for subprocesses until the number that are still running
4010 is below a given threshold. For each complete subprocess, the addresses are
4011 post-processed. If we can't find a running process, there is some shambles.
4012 Better not bomb out, as that might lead to multiple copies of the message. Just
4013 log and proceed as if all done.
4016 max maximum number of subprocesses to leave running
4017 fallback TRUE if processing fallback hosts
4023 par_reduce(int max, BOOL fallback)
4025 while (parcount > max)
4027 address_item *doneaddr = par_wait();
4030 log_write(0, LOG_MAIN|LOG_PANIC,
4031 "remote delivery process count got out of step");
4036 transport_instance * tp = doneaddr->transport;
4037 if (tp->max_parallel)
4038 enq_end(string_sprintf("tpt-serialize-%s", tp->name));
4040 remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
4049 rmt_dlv_checked_write(int fd, char id, char subid, void * buf, int size)
4051 uschar writebuffer[PIPE_HEADER_SIZE + BIG_BUFFER_SIZE];
4055 /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */
4056 /* complain to log if someone tries with buffer sizes we can't handle*/
4060 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4061 "Failed writing transport result to pipe: can't handle buffers > 99999 bytes. truncating!\n");
4065 /* to keep the write() atomic we build header in writebuffer and copy buf behind */
4066 /* two write() calls would increase the complexity of reading from pipe */
4068 /* convert size to human readable string prepended by id and subid */
4069 header_length = snprintf(CS writebuffer, PIPE_HEADER_SIZE+1, "%c%c%05d", id, subid, size);
4070 if (header_length != PIPE_HEADER_SIZE)
4072 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n");
4073 writebuffer[0] = '\0';
4076 DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%d,final:%s\n",
4077 id, subid, size, writebuffer);
4079 if (buf && size > 0)
4080 memcpy(writebuffer + PIPE_HEADER_SIZE, buf, size);
4082 size += PIPE_HEADER_SIZE;
4083 if ((ret = write(fd, writebuffer, size)) != size)
4084 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed writing transport result to pipe: %s\n",
4085 ret == -1 ? strerror(errno) : "short write");
4088 /*************************************************
4089 * Do remote deliveries *
4090 *************************************************/
4092 /* This function is called to process the addresses in addr_remote. We must
4093 pick off the queue all addresses that have the same transport, remote
4094 destination, and errors address, and hand them to the transport in one go,
4095 subject to some configured limitations. If this is a run to continue delivering
4096 to an existing delivery channel, skip all but those addresses that can go to
4097 that channel. The skipped addresses just get deferred.
4099 If mua_wrapper is set, all addresses must be able to be sent in a single
4100 transaction. If not, this function yields FALSE.
4102 In Exim 4, remote deliveries are always done in separate processes, even
4103 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
4104 is so that the base process can retain privilege. This makes the
4105 implementation of fallback transports feasible (though not initially done.)
4107 We create up to the configured number of subprocesses, each of which passes
4108 back the delivery state via a pipe. (However, when sending down an existing
4109 connection, remote_max_parallel is forced to 1.)
4112 fallback TRUE if processing fallback hosts
4114 Returns: TRUE normally
4115 FALSE if mua_wrapper is set and the addresses cannot all be sent
4120 do_remote_deliveries(BOOL fallback)
4126 parcount = 0; /* Number of executing subprocesses */
4128 /* When sending down an existing channel, only do one delivery at a time.
4129 We use a local variable (parmax) to hold the maximum number of processes;
4130 this gets reduced from remote_max_parallel if we can't create enough pipes. */
4132 if (continue_transport) remote_max_parallel = 1;
4133 parmax = remote_max_parallel;
4135 /* If the data for keeping a list of processes hasn't yet been
4140 parlist = store_get(remote_max_parallel * sizeof(pardata));
4141 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4142 parlist[poffset].pid = 0;
4145 /* Now loop for each remote delivery */
4147 for (delivery_count = 0; addr_remote; delivery_count++)
4153 int address_count = 1;
4154 int address_count_max;
4156 BOOL use_initgroups;
4157 BOOL pipe_done = FALSE;
4158 transport_instance *tp;
4159 address_item **anchor = &addr_remote;
4160 address_item *addr = addr_remote;
4161 address_item *last = addr;
4164 uschar * serialize_key = NULL;
4166 /* Pull the first address right off the list. */
4168 addr_remote = addr->next;
4171 DEBUG(D_deliver|D_transport)
4172 debug_printf("--------> %s <--------\n", addr->address);
4174 /* If no transport has been set, there has been a big screw-up somewhere. */
4176 if (!(tp = addr->transport))
4178 disable_logging = FALSE; /* Jic */
4179 panicmsg = US"No transport set by router";
4180 goto panic_continue;
4183 /* Check that this base address hasn't previously been delivered to this
4184 transport. The check is necessary at this point to handle homonymic addresses
4185 correctly in cases where the pattern of redirection changes between delivery
4186 attempts. Non-homonymic previous delivery is detected earlier, at routing
4189 if (previously_transported(addr, FALSE)) continue;
4191 /* Force failure if the message is too big. */
4193 if (tp->message_size_limit)
4195 int rc = check_message_size(tp, addr);
4198 addr->transport_return = rc;
4199 remote_post_process(addr, LOG_MAIN, NULL, fallback);
4204 /* Get the flag which specifies whether the transport can handle different
4205 domains that nevertheless resolve to the same set of hosts. If it needs
4206 expanding, get variables set: $address_data, $domain_data, $localpart_data,
4207 $host, $host_address, $host_port. */
4208 if (tp->expand_multi_domain)
4209 deliver_set_expansions(addr);
4211 if (exp_bool(addr, US"transport", tp->name, D_transport,
4212 US"multi_domain", tp->multi_domain, tp->expand_multi_domain,
4213 &multi_domain) != OK)
4215 deliver_set_expansions(NULL);
4216 panicmsg = addr->message;
4217 goto panic_continue;
4220 /* Get the maximum it can handle in one envelope, with zero meaning
4221 unlimited, which is forced for the MUA wrapper case. */
4223 address_count_max = tp->max_addresses;
4224 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
4227 /************************************************************************/
4228 /***** This is slightly experimental code, but should be safe. *****/
4230 /* The address_count_max value is the maximum number of addresses that the
4231 transport can send in one envelope. However, the transport must be capable of
4232 dealing with any number of addresses. If the number it gets exceeds its
4233 envelope limitation, it must send multiple copies of the message. This can be
4234 done over a single connection for SMTP, so uses less resources than making
4235 multiple connections. On the other hand, if remote_max_parallel is greater
4236 than one, it is perhaps a good idea to use parallel processing to move the
4237 message faster, even if that results in multiple simultaneous connections to
4240 How can we come to some compromise between these two ideals? What we do is to
4241 limit the number of addresses passed to a single instance of a transport to
4242 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
4243 number of addresses routed to remote transports divided by
4244 remote_max_parallel. For example, if the message has 100 remote recipients,
4245 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
4246 once. But if rcpt_max is 100, we could send up to 100.
4248 Of course, not all the remotely addresses in a message are going to go to the
4249 same set of hosts (except in smarthost configurations), so this is just a
4250 heuristic way of dividing up the work.
4252 Furthermore (1), because this may not be wanted in some cases, and also to
4253 cope with really pathological cases, there is also a limit to the number of
4254 messages that are sent over one connection. This is the same limit that is
4255 used when sending several different messages over the same connection.
4256 Continue_sequence is set when in this situation, to the number sent so
4257 far, including this message.
4259 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
4260 is probably because they are using VERP, in which case they want to pass only
4261 one address at a time to the transport, in order to be able to use
4262 $local_part and $domain in constructing a new return path. We could test for
4263 the use of these variables, but as it is so likely they will be used when the
4264 maximum is 1, we don't bother. Just leave the value alone. */
4266 if ( address_count_max != 1
4267 && address_count_max < remote_delivery_count/remote_max_parallel
4270 int new_max = remote_delivery_count/remote_max_parallel;
4271 int message_max = tp->connection_max_messages;
4272 if (connection_max_messages >= 0) message_max = connection_max_messages;
4273 message_max -= continue_sequence - 1;
4274 if (message_max > 0 && new_max > address_count_max * message_max)
4275 new_max = address_count_max * message_max;
4276 address_count_max = new_max;
4279 /************************************************************************/
4282 /* Pick off all addresses which have the same transport, errors address,
4283 destination, and extra headers. In some cases they point to the same host
4284 list, but we also need to check for identical host lists generated from
4285 entirely different domains. The host list pointers can be NULL in the case
4286 where the hosts are defined in the transport. There is also a configured
4287 maximum limit of addresses that can be handled at once (see comments above
4288 for how it is computed).
4289 If the transport does not handle multiple domains, enforce that also,
4290 and if it might need a per-address check for this, re-evaluate it.
4293 while ((next = *anchor) && address_count < address_count_max)
4296 if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
4297 && tp == next->transport
4298 && same_hosts(next->host_list, addr->host_list)
4299 && same_strings(next->prop.errors_address, addr->prop.errors_address)
4300 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
4301 && same_ugid(tp, next, addr)
4302 && ( next->prop.remove_headers == addr->prop.remove_headers
4303 || ( next->prop.remove_headers
4304 && addr->prop.remove_headers
4305 && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0
4309 !tp->expand_multi_domain || (deliver_set_expansions(next), 1),
4311 US"transport", next->transport->name, D_transport,
4312 US"multi_domain", next->transport->multi_domain,
4313 next->transport->expand_multi_domain, &md) == OK
4318 *anchor = next->next;
4320 next->first = addr; /* remember top one (for retry processing) */
4325 else anchor = &(next->next);
4326 deliver_set_expansions(NULL);
4329 /* If we are acting as an MUA wrapper, all addresses must go in a single
4330 transaction. If not, put them back on the chain and yield FALSE. */
4332 if (mua_wrapper && addr_remote)
4334 last->next = addr_remote;
4339 /* If the transport is limited for parallellism, enforce that here.
4340 The hints DB entry is decremented in par_reduce(), when we reap the
4341 transport process. */
4343 if (tpt_parallel_check(tp, addr, &serialize_key))
4344 if ((panicmsg = expand_string_message))
4345 goto panic_continue;
4347 continue; /* Loop for the next set of addresses. */
4349 /* Set up the expansion variables for this set of addresses */
4351 deliver_set_expansions(addr);
4353 /* Ensure any transport-set auth info is fresh */
4354 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
4356 /* Compute the return path, expanding a new one if required. The old one
4357 must be set first, as it might be referred to in the expansion. */
4359 if(addr->prop.errors_address)
4360 return_path = addr->prop.errors_address;
4361 #ifdef EXPERIMENTAL_SRS
4362 else if(addr->prop.srs_sender)
4363 return_path = addr->prop.srs_sender;
4366 return_path = sender_address;
4368 if (tp->return_path)
4370 uschar *new_return_path = expand_string(tp->return_path);
4371 if (new_return_path)
4372 return_path = new_return_path;
4373 else if (!expand_string_forcedfail)
4375 panicmsg = string_sprintf("Failed to expand return path \"%s\": %s",
4376 tp->return_path, expand_string_message);
4381 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
4382 logs and sets up error messages, so we just post-process and continue with
4383 the next address. */
4385 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
4391 /* If this transport has a setup function, call it now so that it gets
4392 run in this process and not in any subprocess. That way, the results of
4393 any setup that are retained by the transport can be reusable. One of the
4394 things the setup does is to set the fallback host lists in the addresses.
4395 That is why it is called at this point, before the continue delivery
4396 processing, because that might use the fallback hosts. */
4399 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
4401 /* If this is a run to continue delivery down an already-established
4402 channel, check that this set of addresses matches the transport and
4403 the channel. If it does not, defer the addresses. If a host list exists,
4404 we must check that the continue host is on the list. Otherwise, the
4405 host is set in the transport. */
4407 continue_more = FALSE; /* In case got set for the last lot */
4408 if (continue_transport)
4410 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
4411 if (ok && addr->host_list)
4415 for (h = addr->host_list; h; h = h->next)
4416 if (Ustrcmp(h->name, continue_hostname) == 0)
4417 { ok = TRUE; break; }
4420 /* Addresses not suitable; defer or queue for fallback hosts (which
4421 might be the continue host) and skip to next address. */
4425 DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n");
4426 if (serialize_key) enq_end(serialize_key);
4428 if (addr->fallback_hosts && !fallback)
4430 for (next = addr; ; next = next->next)
4432 next->host_list = next->fallback_hosts;
4433 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
4434 if (!next->next) break;
4436 next->next = addr_fallback;
4437 addr_fallback = addr;
4442 while (next->next) next = next->next;
4443 next->next = addr_defer;
4450 /* Set a flag indicating whether there are further addresses that list
4451 the continued host. This tells the transport to leave the channel open,
4452 but not to pass it to another delivery process. */
4454 for (next = addr_remote; next; next = next->next)
4457 for (h = next->host_list; h; h = h->next)
4458 if (Ustrcmp(h->name, continue_hostname) == 0)
4459 { continue_more = TRUE; break; }
4463 /* The transports set up the process info themselves as they may connect
4464 to more than one remote machine. They also have to set up the filter
4465 arguments, if required, so that the host name and address are available
4468 transport_filter_argv = NULL;
4470 /* Create the pipe for inter-process communication. If pipe creation
4471 fails, it is probably because the value of remote_max_parallel is so
4472 large that too many file descriptors for pipes have been created. Arrange
4473 to wait for a process to finish, and then try again. If we still can't
4474 create a pipe when all processes have finished, break the retry loop. */
4478 if (pipe(pfd) == 0) pipe_done = TRUE;
4479 else if (parcount > 0) parmax = parcount;
4482 /* We need to make the reading end of the pipe non-blocking. There are
4483 two different options for this. Exim is cunningly (I hope!) coded so
4484 that it can use either of them, though it prefers O_NONBLOCK, which
4485 distinguishes between EOF and no-more-data. */
4488 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
4490 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
4493 /* If the maximum number of subprocesses already exist, wait for a process
4494 to finish. If we ran out of file descriptors, parmax will have been reduced
4495 from its initial value of remote_max_parallel. */
4497 par_reduce(parmax - 1, fallback);
4500 /* If we failed to create a pipe and there were no processes to wait
4501 for, we have to give up on this one. Do this outside the above loop
4502 so that we can continue the main loop. */
4506 panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno));
4510 /* Find a free slot in the pardata list. Must do this after the possible
4511 waiting for processes to finish, because a terminating process will free
4514 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4515 if (parlist[poffset].pid == 0)
4518 /* If there isn't one, there has been a horrible disaster. */
4520 if (poffset >= remote_max_parallel)
4522 (void)close(pfd[pipe_write]);
4523 (void)close(pfd[pipe_read]);
4524 panicmsg = US"Unexpectedly no free subprocess slot";
4528 /* Now fork a subprocess to do the remote delivery, but before doing so,
4529 ensure that any cached resourses are released so as not to interfere with
4530 what happens in the subprocess. */
4534 if ((pid = fork()) == 0)
4536 int fd = pfd[pipe_write];
4539 /* Setting this global in the subprocess means we need never clear it */
4540 transport_name = tp->name;
4542 /* There are weird circumstances in which logging is disabled */
4543 disable_logging = tp->disable_logging;
4545 /* Show pids on debug output if parallelism possible */
4547 if (parmax > 1 && (parcount > 0 || addr_remote))
4549 DEBUG(D_any|D_v) debug_selector |= D_pid;
4550 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
4553 /* Reset the random number generator, so different processes don't all
4554 have the same sequence. In the test harness we want different, but
4555 predictable settings for each delivery process, so do something explicit
4556 here rather they rely on the fixed reset in the random number function. */
4558 random_seed = running_in_test_harness? 42 + 2*delivery_count : 0;
4560 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4561 a new process that may be forked to do another delivery down the same
4564 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4566 /* Close open file descriptors for the pipes of other processes
4567 that are running in parallel. */
4569 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4570 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4572 /* This process has inherited a copy of the file descriptor
4573 for the data file, but its file pointer is shared with all the
4574 other processes running in parallel. Therefore, we have to re-open
4575 the file in order to get a new file descriptor with its own
4576 file pointer. We don't need to lock it, as the lock is held by
4577 the parent process. There doesn't seem to be any way of doing
4578 a dup-with-new-file-pointer. */
4580 (void)close(deliver_datafile);
4582 uschar * fname = spool_fname(US"input", message_subdir, message_id, US"-D");
4584 if ((deliver_datafile = Uopen(fname, O_RDWR | O_APPEND, 0)) < 0)
4585 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4586 "parallel delivery: %s", fname, strerror(errno));
4589 /* Set the close-on-exec flag */
4591 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4594 /* Set the uid/gid of this process; bombs out on failure. */
4596 exim_setugid(uid, gid, use_initgroups,
4597 string_sprintf("remote delivery to %s with transport=%s",
4598 addr->address, tp->name));
4600 /* Close the unwanted half of this process' pipe, set the process state,
4601 and run the transport. Afterwards, transport_count will contain the number
4602 of bytes written. */
4604 (void)close(pfd[pipe_read]);
4605 set_process_info("delivering %s using %s", message_id, tp->name);
4606 debug_print_string(tp->debug_string);
4607 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4609 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4610 message_id, tp->name, addr->address, addr->next ? ", ..." : "");
4612 /* Ensure any cached resources that we used are now released */
4616 /* Pass the result back down the pipe. This is a lot more information
4617 than is needed for a local delivery. We have to send back the error
4618 status for each address, the usability status for each host that is
4619 flagged as unusable, and all the retry items. When TLS is in use, we
4620 send also the cipher and peerdn information. Each type of information
4621 is flagged by an identifying byte, and is then in a fixed format (with
4622 strings terminated by zeros), and there is a final terminator at the
4623 end. The host information and retry information is all attached to
4624 the first address, so that gets sent at the start. */
4626 /* Host unusability information: for most success cases this will
4629 for (h = addr->host_list; h; h = h->next)
4631 if (!h->address || h->status < hstatus_unusable) continue;
4632 sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address);
4633 rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3);
4636 /* The number of bytes written. This is the same for each address. Even
4637 if we sent several copies of the message down the same connection, the
4638 size of each one is the same, and it's that value we have got because
4639 transport_count gets reset before calling transport_write_message(). */
4641 memcpy(big_buffer, &transport_count, sizeof(transport_count));
4642 rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count));
4644 /* Information about what happened to each address. Four item types are
4645 used: an optional 'X' item first, for TLS information, then an optional "C"
4646 item for any client-auth info followed by 'R' items for any retry settings,
4647 and finally an 'A' item for the remaining data. */
4649 for(; addr; addr = addr->next)
4654 /* The certificate verification status goes into the flags */
4655 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4656 #ifdef EXPERIMENTAL_DANE
4657 if (tls_out.dane_verified) setflag(addr, af_dane_verified);
4660 /* Use an X item only if there's something to send */
4664 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1;
4669 ptr += sprintf(CS ptr, "%.512s", addr->peerdn);
4673 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4678 if (!tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4682 rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer);
4687 if (!tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4691 rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer);
4693 # ifndef DISABLE_OCSP
4694 if (addr->ocsp > OCSP_NOT_REQ)
4696 ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1;
4697 rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer);
4700 #endif /*SUPPORT_TLS*/
4702 if (client_authenticator)
4704 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1;
4705 rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer);
4707 if (client_authenticated_id)
4709 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1;
4710 rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer);
4712 if (client_authenticated_sender)
4714 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1;
4715 rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer);
4718 #ifndef DISABLE_PRDR
4719 if (addr->flags & af_prdr_used)
4720 rmt_dlv_checked_write(fd, 'P', '0', NULL, 0);
4723 memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware));
4724 rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware));
4725 DEBUG(D_deliver) debug_printf("DSN write: addr->dsn_aware = %d\n", addr->dsn_aware);
4727 /* Retry information: for most success cases this will be null. */
4729 for (r = addr->retries; r; r = r->next)
4731 sprintf(CS big_buffer, "%c%.500s", r->flags, r->key);
4732 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4733 memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno));
4734 ptr += sizeof(r->basic_errno);
4735 memcpy(ptr, &(r->more_errno), sizeof(r->more_errno));
4736 ptr += sizeof(r->more_errno);
4737 if (!r->message) *ptr++ = 0; else
4739 sprintf(CS ptr, "%.512s", r->message);
4742 rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer);
4745 #ifdef SUPPORT_SOCKS
4746 if (LOGGING(proxy) && proxy_session)
4749 if (proxy_local_address)
4751 DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address);
4752 ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1;
4753 DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port);
4754 memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port));
4755 ptr += sizeof(proxy_local_port);
4759 rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer);
4763 #ifdef EXPERIMENTAL_DSN_INFO
4764 /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */
4765 if (addr->smtp_greeting)
4767 DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting);
4768 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1;
4769 if (addr->helo_response)
4771 DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response);
4772 ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1;
4776 rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer);
4780 /* The rest of the information goes in an 'A0' item. */
4782 sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action);
4783 ptr = big_buffer + 2;
4784 memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno));
4785 ptr += sizeof(addr->basic_errno);
4786 memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno));
4787 ptr += sizeof(addr->more_errno);
4788 memcpy(ptr, &(addr->flags), sizeof(addr->flags));
4789 ptr += sizeof(addr->flags);
4791 if (!addr->message) *ptr++ = 0; else
4792 ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1;
4794 if (!addr->user_message) *ptr++ = 0; else
4795 ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1;
4797 if (!addr->host_used) *ptr++ = 0; else
4799 ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1;
4800 ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1;
4801 memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port));
4802 ptr += sizeof(addr->host_used->port);
4804 /* DNS lookup status */
4805 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4806 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4809 rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer);
4812 /* Local interface address/port */
4813 #ifdef EXPERIMENTAL_DSN_INFO
4814 if (sending_ip_address)
4816 if (LOGGING(incoming_interface) && sending_ip_address)
4820 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1;
4821 ptr += sprintf(CS ptr, "%d", sending_port) + 1;
4822 rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer);
4825 /* Add termination flag, close the pipe, and that's it. The character
4826 after 'Z' indicates whether continue_transport is now NULL or not.
4827 A change from non-NULL to NULL indicates a problem with a continuing
4830 big_buffer[0] = continue_transport ? '1' : '0';
4831 rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1);
4836 /* Back in the mainline: close the unwanted half of the pipe. */
4838 (void)close(pfd[pipe_write]);
4840 /* Fork failed; defer with error message */
4844 (void)close(pfd[pipe_read]);
4845 panicmsg = string_sprintf("fork failed for remote delivery to %s: %s",
4846 addr->domain, strerror(errno));
4850 /* Fork succeeded; increment the count, and remember relevant data for
4851 when the process finishes. */
4854 parlist[poffset].addrlist = parlist[poffset].addr = addr;
4855 parlist[poffset].pid = pid;
4856 parlist[poffset].fd = pfd[pipe_read];
4857 parlist[poffset].done = FALSE;
4858 parlist[poffset].msg = NULL;
4859 parlist[poffset].return_path = return_path;
4861 /* If the process we've just started is sending a message down an existing
4862 channel, wait for it now. This ensures that only one such process runs at
4863 once, whatever the value of remote_max parallel. Otherwise, we might try to
4864 send two or more messages simultaneously down the same channel. This could
4865 happen if there are different domains that include the same host in otherwise
4866 different host lists.
4868 Also, if the transport closes down the channel, this information gets back
4869 (continue_transport gets set to NULL) before we consider any other addresses
4872 if (continue_transport) par_reduce(0, fallback);
4874 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4875 newly created process get going before we create another process. This should
4876 ensure repeatability in the tests. We only need to wait a tad. */
4878 else if (running_in_test_harness) millisleep(500);
4883 if (serialize_key) enq_end(serialize_key);
4885 remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback);
4889 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4890 are still running and post-process their addresses. */
4892 par_reduce(0, fallback);
4899 /*************************************************
4900 * Split an address into local part and domain *
4901 *************************************************/
4903 /* This function initializes an address for routing by splitting it up into a
4904 local part and a domain. The local part is set up twice - once in its original
4905 casing, and once in lower case, and it is dequoted. We also do the "percent
4906 hack" for configured domains. This may lead to a DEFER result if a lookup
4907 defers. When a percent-hacking takes place, we insert a copy of the original
4908 address as a new parent of this address, as if we have had a redirection.
4911 addr points to an addr_item block containing the address
4914 DEFER - could not determine if domain is %-hackable
4918 deliver_split_address(address_item * addr)
4920 uschar * address = addr->address;
4925 if (!(domain = Ustrrchr(address, '@')))
4926 return DEFER; /* should always have a domain, but just in case... */
4928 len = domain - address;
4929 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
4931 /* The implication in the RFCs (though I can't say I've seen it spelled out
4932 explicitly) is that quoting should be removed from local parts at the point
4933 where they are locally interpreted. [The new draft "821" is more explicit on
4934 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4935 removing quoting backslashes and any unquoted doublequotes. */
4937 t = addr->cc_local_part = store_get(len+1);
4941 if (c == '\"') continue;
4951 /* We do the percent hack only for those domains that are listed in
4952 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4954 if (percent_hack_domains)
4957 uschar *new_address = NULL;
4958 uschar *local_part = addr->cc_local_part;
4960 deliver_domain = addr->domain; /* set $domain */
4962 while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0,
4963 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
4965 && (t = Ustrrchr(local_part, '%')) != NULL
4968 new_address = string_copy(local_part);
4969 new_address[t - local_part] = '@';
4970 deliver_domain = string_copylc(t+1);
4971 local_part = string_copyn(local_part, t - local_part);
4974 if (rc == DEFER) return DEFER; /* lookup deferred */
4976 /* If hackery happened, set up new parent and alter the current address. */
4980 address_item *new_parent = store_get(sizeof(address_item));
4981 *new_parent = *addr;
4982 addr->parent = new_parent;
4983 addr->address = new_address;
4984 addr->unique = string_copy(new_address);
4985 addr->domain = deliver_domain;
4986 addr->cc_local_part = local_part;
4987 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
4992 /* Create the lowercased version of the final local part, and make that the
4993 default one to be used. */
4995 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
5002 /*************************************************
5003 * Get next error message text *
5004 *************************************************/
5006 /* If f is not NULL, read the next "paragraph", from a customized error message
5007 text file, terminated by a line containing ****, and expand it.
5010 f NULL or a file to read from
5011 which string indicating which string (for errors)
5013 Returns: NULL or an expanded string
5017 next_emf(FILE *f, uschar *which)
5021 uschar *para, *yield;
5024 if (!f) return NULL;
5026 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5029 para = store_get(size);
5032 para = string_cat(para, &size, &ptr, buffer);
5033 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
5038 if ((yield = expand_string(para)))
5041 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
5042 "bounce_message_file or warn_message_file (%s): %s", which,
5043 expand_string_message);
5050 /*************************************************
5051 * Close down a passed transport channel *
5052 *************************************************/
5054 /* This function is called when a passed transport channel cannot be used.
5055 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
5056 so that the function call can be the argument of a "return" statement.
5059 Returns: DELIVER_NOT_ATTEMPTED
5063 continue_closedown(void)
5065 if (continue_transport)
5067 transport_instance *t;
5068 for (t = transports; t; t = t->next)
5069 if (Ustrcmp(t->name, continue_transport) == 0)
5071 if (t->info->closedown) (t->info->closedown)(t);
5075 return DELIVER_NOT_ATTEMPTED;
5081 /*************************************************
5082 * Print address information *
5083 *************************************************/
5085 /* This function is called to output an address, or information about an
5086 address, for bounce or defer messages. If the hide_child flag is set, all we
5087 output is the original ancestor address.
5090 addr points to the address
5091 f the FILE to print to
5092 si an initial string
5093 sc a continuation string for before "generated"
5096 Returns: TRUE if the address is not hidden
5100 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
5104 uschar *printed = US"";
5105 address_item *ancestor = addr;
5106 while (ancestor->parent) ancestor = ancestor->parent;
5108 fprintf(f, "%s", CS si);
5110 if (addr->parent && testflag(addr, af_hide_child))
5112 printed = US"an undisclosed address";
5115 else if (!testflag(addr, af_pfr) || !addr->parent)
5116 printed = addr->address;
5120 uschar *s = addr->address;
5123 if (addr->address[0] == '>') { ss = US"mail"; s++; }
5124 else if (addr->address[0] == '|') ss = US"pipe";
5127 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
5128 printed = addr->parent->address;
5131 fprintf(f, "%s", CS string_printing(printed));
5133 if (ancestor != addr)
5135 uschar *original = ancestor->onetime_parent;
5136 if (!original) original= ancestor->address;
5137 if (strcmpic(original, printed) != 0)
5138 fprintf(f, "%s(%sgenerated from %s)", sc,
5139 ancestor != addr->parent ? "ultimately " : "",
5140 string_printing(original));
5143 if (addr->host_used)
5144 fprintf(f, "\n host %s [%s]",
5145 addr->host_used->name, addr->host_used->address);
5147 fprintf(f, "%s", CS se);
5155 /*************************************************
5156 * Print error for an address *
5157 *************************************************/
5159 /* This function is called to print the error information out of an address for
5160 a bounce or a warning message. It tries to format the message reasonably by
5161 introducing newlines. All lines are indented by 4; the initial printing
5162 position must be set before calling.
5164 This function used always to print the error. Nowadays we want to restrict it
5165 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
5166 and filter "fail". We no longer pass other information willy-nilly in bounce
5167 and warning messages. Text in user_message is always output; text in message
5168 only if the af_pass_message flag is set.
5172 f the FILE to print on
5179 print_address_error(address_item *addr, FILE *f, uschar *t)
5181 int count = Ustrlen(t);
5182 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
5184 if (!s && !(s = addr->user_message))
5187 fprintf(f, "\n %s", t);
5190 if (*s == '\\' && s[1] == 'n')
5200 if (*s++ == ':' && isspace(*s) && count > 45)
5202 fprintf(f, "\n "); /* sic (because space follows) */
5209 /***********************************************************
5210 * Print Diagnostic-Code for an address *
5211 ************************************************************/
5213 /* This function is called to print the error information out of an address for
5214 a bounce or a warning message. It tries to format the message reasonably as
5215 required by RFC 3461 by adding a space after each newline
5217 it uses the same logic as print_address_error() above. if af_pass_message is true
5218 and addr->message is set it uses the remote host answer. if not addr->user_message
5219 is used instead if available.
5223 f the FILE to print on
5229 print_dsn_diagnostic_code(const address_item *addr, FILE *f)
5231 uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL;
5233 /* af_pass_message and addr->message set ? print remote host answer */
5237 debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message);
5239 /* search first ": ". we assume to find the remote-MTA answer there */
5240 if (!(s = Ustrstr(addr->message, ": ")))
5241 return; /* not found, bail out */
5242 s += 2; /* skip ": " */
5243 fprintf(f, "Diagnostic-Code: smtp; ");
5245 /* no message available. do nothing */
5249 if (*s == '\\' && s[1] == 'n')
5251 fputs("\n ", f); /* as defined in RFC 3461 */
5261 /*************************************************
5262 * Check list of addresses for duplication *
5263 *************************************************/
5265 /* This function was introduced when the test for duplicate addresses that are
5266 not pipes, files, or autoreplies was moved from the middle of routing to when
5267 routing was complete. That was to fix obscure cases when the routing history
5268 affects the subsequent routing of identical addresses. This function is called
5269 after routing, to check that the final routed addresses are not duplicates.
5271 If we detect a duplicate, we remember what it is a duplicate of. Note that
5272 pipe, file, and autoreply de-duplication is handled during routing, so we must
5273 leave such "addresses" alone here, as otherwise they will incorrectly be
5276 Argument: address of list anchor
5281 do_duplicate_check(address_item **anchor)
5284 while ((addr = *anchor))
5287 if (testflag(addr, af_pfr))
5289 anchor = &(addr->next);
5291 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
5293 DEBUG(D_deliver|D_route)
5294 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
5295 *anchor = addr->next;
5296 addr->dupof = tnode->data.ptr;
5297 addr->next = addr_duplicate;
5298 addr_duplicate = addr;
5302 tree_add_duplicate(addr->unique, addr);
5303 anchor = &(addr->next);
5311 /*************************************************
5312 * Deliver one message *
5313 *************************************************/
5315 /* This is the function which is called when a message is to be delivered. It
5316 is passed the id of the message. It is possible that the message no longer
5317 exists, if some other process has delivered it, and it is also possible that
5318 the message is being worked on by another process, in which case the data file
5321 If no delivery is attempted for any of the above reasons, the function returns
5322 DELIVER_NOT_ATTEMPTED.
5324 If the give_up flag is set true, do not attempt any deliveries, but instead
5325 fail all outstanding addresses and return the message to the sender (or
5328 A delivery operation has a process all to itself; we never deliver more than
5329 one message in the same process. Therefore we needn't worry too much about
5333 id the id of the message to be delivered
5334 forced TRUE if delivery was forced by an administrator; this overrides
5335 retry delays and causes a delivery to be tried regardless
5336 give_up TRUE if an administrator has requested that delivery attempts
5339 Returns: When the global variable mua_wrapper is FALSE:
5340 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
5341 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
5342 When the global variable mua_wrapper is TRUE:
5343 DELIVER_MUA_SUCCEEDED if delivery succeeded
5344 DELIVER_MUA_FAILED if delivery failed
5345 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
5349 deliver_message(uschar *id, BOOL forced, BOOL give_up)
5352 int final_yield = DELIVER_ATTEMPTED_NORMAL;
5353 time_t now = time(NULL);
5354 address_item *addr_last = NULL;
5355 uschar *filter_message = NULL;
5357 int process_recipients = RECIP_ACCEPT;
5360 extern int acl_where;
5362 uschar *info = queue_run_pid == (pid_t)0
5363 ? string_sprintf("delivering %s", id)
5364 : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
5366 /* If the D_process_info bit is on, set_process_info() will output debugging
5367 information. If not, we want to show this initial information if D_deliver or
5368 D_queue_run is set or in verbose mode. */
5370 set_process_info("%s", info);
5372 if ( !(debug_selector & D_process_info)
5373 && (debug_selector & (D_deliver|D_queue_run|D_v))
5375 debug_printf("%s\n", info);
5377 /* Ensure that we catch any subprocesses that are created. Although Exim
5378 sets SIG_DFL as its initial default, some routes through the code end up
5379 here with it set to SIG_IGN - cases where a non-synchronous delivery process
5380 has been forked, but no re-exec has been done. We use sigaction rather than
5381 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
5382 sure it is turned off. (There was a problem on AIX with this.) */
5386 struct sigaction act;
5387 act.sa_handler = SIG_DFL;
5388 sigemptyset(&(act.sa_mask));
5390 sigaction(SIGCHLD, &act, NULL);
5393 signal(SIGCHLD, SIG_DFL);
5396 /* Make the forcing flag available for routers and transports, set up the
5397 global message id field, and initialize the count for returned files and the
5398 message size. This use of strcpy() is OK because the length id is checked when
5399 it is obtained from a command line (the -M or -q options), and otherwise it is
5400 known to be a valid message id. */
5402 Ustrcpy(message_id, id);
5403 deliver_force = forced;
5407 /* Initialize some flags */
5409 update_spool = FALSE;
5410 remove_journal = TRUE;
5412 /* Set a known context for any ACLs we call via expansions */
5413 acl_where = ACL_WHERE_DELIVERY;
5415 /* Reset the random number generator, so that if several delivery processes are
5416 started from a queue runner that has already used random numbers (for sorting),
5417 they don't all get the same sequence. */
5421 /* Open and lock the message's data file. Exim locks on this one because the
5422 header file may get replaced as it is re-written during the delivery process.
5423 Any failures cause messages to be written to the log, except for missing files
5424 while queue running - another process probably completed delivery. As part of
5425 opening the data file, message_subdir gets set. */
5427 if ((deliver_datafile = spool_open_datafile(id)) < 0)
5428 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5430 /* The value of message_size at this point has been set to the data length,
5431 plus one for the blank line that notionally precedes the data. */
5433 /* Now read the contents of the header file, which will set up the headers in
5434 store, and also the list of recipients and the tree of non-recipients and
5435 assorted flags. It updates message_size. If there is a reading or format error,
5436 give up; if the message has been around for sufficiently long, remove it. */
5439 uschar * spoolname = string_sprintf("%s-H", id);
5440 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
5442 if (errno == ERRNO_SPOOLFORMAT)
5444 struct stat statbuf;
5445 if (Ustat(spool_fname(US"input", message_subdir, spoolname, US""),
5447 log_write(0, LOG_MAIN, "Format error in spool file %s: "
5448 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
5450 log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
5453 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
5456 /* If we managed to read the envelope data, received_time contains the
5457 time the message was received. Otherwise, we can calculate it from the
5460 if (rc != spool_read_hdrerror)
5463 for (i = 0; i < 6; i++)
5464 received_time = received_time * BASE_62 + tab62[id[i] - '0'];
5467 /* If we've had this malformed message too long, sling it. */
5469 if (now - received_time > keep_malformed)
5471 Uunlink(spool_fname(US"msglog", message_subdir, id, US""));
5472 Uunlink(spool_fname(US"input", message_subdir, id, US"-D"));
5473 Uunlink(spool_fname(US"input", message_subdir, id, US"-H"));
5474 Uunlink(spool_fname(US"input", message_subdir, id, US"-J"));
5475 log_write(0, LOG_MAIN, "Message removed because older than %s",
5476 readconf_printtime(keep_malformed));
5479 (void)close(deliver_datafile);
5480 deliver_datafile = -1;
5481 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5485 /* The spool header file has been read. Look to see if there is an existing
5486 journal file for this message. If there is, it means that a previous delivery
5487 attempt crashed (program or host) before it could update the spool header file.
5488 Read the list of delivered addresses from the journal and add them to the
5489 nonrecipients tree. Then update the spool file. We can leave the journal in
5490 existence, as it will get further successful deliveries added to it in this
5491 run, and it will be deleted if this function gets to its end successfully.
5492 Otherwise it might be needed again. */
5495 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
5497 if ((jread = Ufopen(fname, "rb")))
5499 while (Ufgets(big_buffer, big_buffer_size, jread))
5501 int n = Ustrlen(big_buffer);
5502 big_buffer[n-1] = 0;
5503 tree_add_nonrecipient(big_buffer);
5504 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
5505 "journal file\n", big_buffer);
5507 (void)fclose(jread);
5508 /* Panic-dies on error */
5509 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5511 else if (errno != ENOENT)
5513 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
5514 "%s", strerror(errno));
5515 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5518 /* A null recipients list indicates some kind of disaster. */
5520 if (!recipients_list)
5522 (void)close(deliver_datafile);
5523 deliver_datafile = -1;
5524 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", fname);
5525 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5530 /* Handle a message that is frozen. There are a number of different things that
5531 can happen, but in the default situation, unless forced, no delivery is
5536 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
5537 /* Moving to another directory removes the message from Exim's view. Other
5538 tools must be used to deal with it. Logging of this action happens in
5539 spool_move_message() and its subfunctions. */
5541 if ( move_frozen_messages
5542 && spool_move_message(id, message_subdir, US"", US"F")
5544 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5547 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
5548 maximum time to keep messages that are frozen. Thaw if we reach it, with a
5549 flag causing all recipients to be failed. The time is the age of the
5550 message, not the time since freezing. */
5552 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
5554 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
5555 process_recipients = RECIP_FAIL_TIMEOUT;
5558 /* For bounce messages (and others with no sender), thaw if the error message
5559 ignore timer is exceeded. The message will be discarded if this delivery
5562 else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
5564 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
5567 /* If this is a bounce message, or there's no auto thaw, or we haven't
5568 reached the auto thaw time yet, and this delivery is not forced by an admin
5569 user, do not attempt delivery of this message. Note that forced is set for
5570 continuing messages down the same channel, in order to skip load checking and
5571 ignore hold domains, but we don't want unfreezing in that case. */
5575 if ( ( sender_address[0] == 0
5577 || now <= deliver_frozen_at + auto_thaw
5579 && ( !forced || !deliver_force_thaw
5580 || !admin_user || continue_hostname
5583 (void)close(deliver_datafile);
5584 deliver_datafile = -1;
5585 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
5586 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5589 /* If delivery was forced (by an admin user), assume a manual thaw.
5590 Otherwise it's an auto thaw. */
5594 deliver_manual_thaw = TRUE;
5595 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
5597 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
5600 /* We get here if any of the rules for unfreezing have triggered. */
5602 deliver_freeze = FALSE;
5603 update_spool = TRUE;
5607 /* Open the message log file if we are using them. This records details of
5608 deliveries, deferments, and failures for the benefit of the mail administrator.
5609 The log is not used by exim itself to track the progress of a message; that is
5610 done by rewriting the header spool file. */
5614 uschar * fname = spool_fname(US"msglog", message_subdir, id, US"");
5618 if ((fd = open_msglog_file(fname, SPOOL_MODE, &error)) < 0)
5620 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
5621 fname, strerror(errno));
5622 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5625 /* Make a C stream out of it. */
5627 if (!(message_log = fdopen(fd, "a")))
5629 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
5630 fname, strerror(errno));
5631 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5636 /* If asked to give up on a message, log who did it, and set the action for all
5641 struct passwd *pw = getpwuid(real_uid);
5642 log_write(0, LOG_MAIN, "cancelled by %s",
5643 pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5644 process_recipients = RECIP_FAIL;
5647 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5649 else if (received_count > received_headers_max)
5650 process_recipients = RECIP_FAIL_LOOP;
5652 /* Otherwise, if a system-wide, address-independent message filter is
5653 specified, run it now, except in the case when we are failing all recipients as
5654 a result of timeout_frozen_after. If the system filter yields "delivered", then
5655 ignore the true recipients of the message. Failure of the filter file is
5656 logged, and the delivery attempt fails. */
5658 else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT)
5663 redirect_block redirect;
5665 if (system_filter_uid_set)
5667 ugid.uid = system_filter_uid;
5668 ugid.gid = system_filter_gid;
5669 ugid.uid_set = ugid.gid_set = TRUE;
5673 ugid.uid_set = ugid.gid_set = FALSE;
5676 return_path = sender_address;
5677 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5678 system_filtering = TRUE;
5680 /* Any error in the filter file causes a delivery to be abandoned. */
5682 redirect.string = system_filter;
5683 redirect.isfile = TRUE;
5684 redirect.check_owner = redirect.check_group = FALSE;
5685 redirect.owners = NULL;
5686 redirect.owngroups = NULL;
5688 redirect.modemask = 0;
5690 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5693 &redirect, /* Where the data is */
5694 RDO_DEFER | /* Turn on all the enabling options */
5695 RDO_FAIL | /* Leave off all the disabling options */
5700 NULL, /* No :include: restriction (not used in filter) */
5701 NULL, /* No sieve vacation directory (not sieve!) */
5702 NULL, /* No sieve enotify mailto owner (not sieve!) */
5703 NULL, /* No sieve user address (not sieve!) */
5704 NULL, /* No sieve subaddress (not sieve!) */
5705 &ugid, /* uid/gid data */
5706 &addr_new, /* Where to hang generated addresses */
5707 &filter_message, /* Where to put error message */
5708 NULL, /* Don't skip syntax errors */
5709 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5710 US"system filter"); /* For error messages */
5712 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5714 if (rc == FF_ERROR || rc == FF_NONEXIST)
5716 (void)close(deliver_datafile);
5717 deliver_datafile = -1;
5718 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5719 string_printing(filter_message));
5720 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5723 /* Reset things. If the filter message is an empty string, which can happen
5724 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5726 system_filtering = FALSE;
5727 enable_dollar_recipients = FALSE;
5728 if (filter_message && filter_message[0] == 0) filter_message = NULL;
5730 /* Save the values of the system filter variables so that user filters
5733 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5735 /* The filter can request that delivery of the original addresses be
5740 process_recipients = RECIP_DEFER;
5741 deliver_msglog("Delivery deferred by system filter\n");
5742 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5745 /* The filter can request that a message be frozen, but this does not
5746 take place if the message has been manually thawed. In that case, we must
5747 unset "delivered", which is forced by the "freeze" command to make -bF
5750 else if (rc == FF_FREEZE && !deliver_manual_thaw)
5752 deliver_freeze = TRUE;
5753 deliver_frozen_at = time(NULL);
5754 process_recipients = RECIP_DEFER;
5755 frozen_info = string_sprintf(" by the system filter%s%s",
5756 filter_message ? US": " : US"",
5757 filter_message ? filter_message : US"");
5760 /* The filter can request that a message be failed. The error message may be
5761 quite long - it is sent back to the sender in the bounce - but we don't want
5762 to fill up the log with repetitions of it. If it starts with << then the text
5763 between << and >> is written to the log, with the rest left for the bounce
5766 else if (rc == FF_FAIL)
5768 uschar *colon = US"";
5769 uschar *logmsg = US"";
5772 process_recipients = RECIP_FAIL_FILTER;
5778 if ( filter_message[0] == '<'
5779 && filter_message[1] == '<'
5780 && (logend = Ustrstr(filter_message, ">>"))
5783 logmsg = filter_message + 2;
5784 loglen = logend - logmsg;
5785 filter_message = logend + 2;
5786 if (filter_message[0] == 0) filter_message = NULL;
5790 logmsg = filter_message;
5791 loglen = Ustrlen(filter_message);
5795 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
5799 /* Delivery can be restricted only to those recipients (if any) that the
5800 filter specified. */
5802 else if (rc == FF_DELIVERED)
5804 process_recipients = RECIP_IGNORE;
5806 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
5808 log_write(0, LOG_MAIN, "=> discarded (system filter)");
5811 /* If any new addresses were created by the filter, fake up a "parent"
5812 for them. This is necessary for pipes, etc., which are expected to have
5813 parents, and it also gives some sensible logging for others. Allow
5814 pipes, files, and autoreplies, and run them as the filter uid if set,
5815 otherwise as the current uid. */
5819 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
5820 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
5822 /* The text "system-filter" is tested in transport_set_up_command() and in
5823 set_up_shell_command() in the pipe transport, to enable them to permit
5824 $recipients, so don't change it here without also changing it there. */
5826 address_item *p = addr_new;
5827 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
5829 parent->domain = string_copylc(qualify_domain_recipient);
5830 parent->local_part = US"system-filter";
5832 /* As part of this loop, we arrange for addr_last to end up pointing
5833 at the final address. This is used if we go on to add addresses for the
5834 original recipients. */
5838 if (parent->child_count == SHRT_MAX)
5839 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
5840 "than %d delivery addresses", SHRT_MAX);
5841 parent->child_count++;
5844 if (testflag(p, af_pfr))
5850 setflag(p, af_uid_set |
5856 /* Find the name of the system filter's appropriate pfr transport */
5858 if (p->address[0] == '|')
5861 tpname = system_filter_pipe_transport;
5862 address_pipe = p->address;
5864 else if (p->address[0] == '>')
5867 tpname = system_filter_reply_transport;
5871 if (p->address[Ustrlen(p->address)-1] == '/')
5873 type = US"directory";
5874 tpname = system_filter_directory_transport;
5879 tpname = system_filter_file_transport;
5881 address_file = p->address;
5884 /* Now find the actual transport, first expanding the name. We have
5885 set address_file or address_pipe above. */
5889 uschar *tmp = expand_string(tpname);
5890 address_file = address_pipe = NULL;
5892 p->message = string_sprintf("failed to expand \"%s\" as a "
5893 "system filter transport name", tpname);
5898 p->message = string_sprintf("system_filter_%s_transport is unset",
5904 transport_instance *tp;
5905 for (tp = transports; tp; tp = tp->next)
5907 if (Ustrcmp(tp->name, tpname) == 0)
5914 p->message = string_sprintf("failed to find \"%s\" transport "
5915 "for system filter delivery", tpname);
5918 /* If we couldn't set up a transport, defer the delivery, putting the
5919 error on the panic log as well as the main log. */
5923 address_item *badp = p;
5925 if (!addr_last) addr_new = p; else addr_last->next = p;
5926 badp->local_part = badp->address; /* Needed for log line */
5927 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
5930 } /* End of pfr handling */
5932 /* Either a non-pfr delivery, or we found a transport */
5934 DEBUG(D_deliver|D_filter)
5935 debug_printf("system filter added %s\n", p->address);
5939 } /* Loop through all addr_new addresses */
5944 /* Scan the recipients list, and for every one that is not in the non-
5945 recipients tree, add an addr item to the chain of new addresses. If the pno
5946 value is non-negative, we must set the onetime parent from it. This which
5947 points to the relevant entry in the recipients list.
5949 This processing can be altered by the setting of the process_recipients
5950 variable, which is changed if recipients are to be ignored, failed, or
5951 deferred. This can happen as a result of system filter activity, or if the -Mg
5952 option is used to fail all of them.
5954 Duplicate addresses are handled later by a different tree structure; we can't
5955 just extend the non-recipients tree, because that will be re-written to the
5956 spool if the message is deferred, and in any case there are casing
5957 complications for local addresses. */
5959 if (process_recipients != RECIP_IGNORE)
5961 for (i = 0; i < recipients_count; i++)
5963 if (!tree_search(tree_nonrecipients, recipients_list[i].address))
5965 recipient_item *r = recipients_list + i;
5966 address_item *new = deliver_make_addr(r->address, FALSE);
5967 new->prop.errors_address = r->errors_to;
5969 if ((new->prop.utf8_msg = message_smtputf8))
5971 new->prop.utf8_downcvt = message_utf8_downconvert == 1;
5972 new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1;
5973 DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n",
5974 new->prop.utf8_downcvt ? "yes"
5975 : new->prop.utf8_downcvt_maybe ? "ifneeded"
5981 new->onetime_parent = recipients_list[r->pno].address;
5983 /* If DSN support is enabled, set the dsn flags and the original receipt
5984 to be passed on to other DSN enabled MTAs */
5985 new->dsn_flags = r->dsn_flags & rf_dsnflags;
5986 new->dsn_orcpt = r->orcpt;
5987 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: %d\n",
5988 new->dsn_orcpt, new->dsn_flags);
5990 switch (process_recipients)
5992 /* RECIP_DEFER is set when a system filter freezes a message. */
5995 new->next = addr_defer;
6000 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
6003 case RECIP_FAIL_FILTER:
6005 filter_message ? filter_message : US"delivery cancelled";
6006 setflag(new, af_pass_message);
6007 goto RECIP_QUEUE_FAILED; /* below */
6010 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
6011 than the value in timeout_frozen_after. Treat non-bounce messages
6012 similarly to -Mg; for bounce messages we just want to discard, so
6013 don't put the address on the failed list. The timeout has already
6016 case RECIP_FAIL_TIMEOUT:
6017 new->message = US"delivery cancelled; message timed out";
6018 goto RECIP_QUEUE_FAILED; /* below */
6021 /* RECIP_FAIL is set when -Mg has been used. */
6024 new->message = US"delivery cancelled by administrator";
6027 /* Common code for the failure cases above. If this is not a bounce
6028 message, put the address on the failed list so that it is used to
6029 create a bounce. Otherwise do nothing - this just discards the address.
6030 The incident has already been logged. */
6033 if (sender_address[0] != 0)
6035 new->next = addr_failed;
6041 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
6042 in the message. Process each address as a routing failure; if this
6043 is a bounce message, it will get frozen. */
6045 case RECIP_FAIL_LOOP:
6046 new->message = US"Too many \"Received\" headers - suspected mail loop";
6047 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6051 /* Value should be RECIP_ACCEPT; take this as the safe default. */
6054 if (!addr_new) addr_new = new; else addr_last->next = new;
6059 #ifndef DISABLE_EVENT
6060 if (process_recipients != RECIP_ACCEPT)
6062 uschar * save_local = deliver_localpart;
6063 const uschar * save_domain = deliver_domain;
6065 deliver_localpart = expand_string(
6066 string_sprintf("${local_part:%s}", new->address));
6067 deliver_domain = expand_string(
6068 string_sprintf("${domain:%s}", new->address));
6070 (void) event_raise(event_action,
6071 US"msg:fail:internal", new->message);
6073 deliver_localpart = save_local;
6074 deliver_domain = save_domain;
6084 debug_printf("Delivery address list:\n");
6085 for (p = addr_new; p; p = p->next)
6086 debug_printf(" %s %s\n", p->address,
6087 p->onetime_parent ? p->onetime_parent : US"");
6090 /* Set up the buffers used for copying over the file when delivering. */
6092 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
6093 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
6097 /* Until there are no more new addresses, handle each one as follows:
6099 . If this is a generated address (indicated by the presence of a parent
6100 pointer) then check to see whether it is a pipe, file, or autoreply, and
6101 if so, handle it directly here. The router that produced the address will
6102 have set the allow flags into the address, and also set the uid/gid required.
6103 Having the routers generate new addresses and then checking them here at
6104 the outer level is tidier than making each router do the checking, and
6105 means that routers don't need access to the failed address queue.
6107 . Break up the address into local part and domain, and make lowercased
6108 versions of these strings. We also make unquoted versions of the local part.
6110 . Handle the percent hack for those domains for which it is valid.
6112 . For child addresses, determine if any of the parents have the same address.
6113 If so, generate a different string for previous delivery checking. Without
6114 this code, if the address spqr generates spqr via a forward or alias file,
6115 delivery of the generated spqr stops further attempts at the top level spqr,
6116 which is not what is wanted - it may have generated other addresses.
6118 . Check on the retry database to see if routing was previously deferred, but
6119 only if in a queue run. Addresses that are to be routed are put on the
6120 addr_route chain. Addresses that are to be deferred are put on the
6121 addr_defer chain. We do all the checking first, so as not to keep the
6122 retry database open any longer than necessary.
6124 . Now we run the addresses through the routers. A router may put the address
6125 on either the addr_local or the addr_remote chain for local or remote
6126 delivery, respectively, or put it on the addr_failed chain if it is
6127 undeliveable, or it may generate child addresses and put them on the
6128 addr_new chain, or it may defer an address. All the chain anchors are
6129 passed as arguments so that the routers can be called for verification
6132 . If new addresses have been generated by the routers, da capo.
6135 header_rewritten = FALSE; /* No headers rewritten yet */
6136 while (addr_new) /* Loop until all addresses dealt with */
6138 address_item *addr, *parent;
6140 /* Failure to open the retry database is treated the same as if it does
6141 not exist. In both cases, dbm_file is NULL. */
6143 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
6145 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
6146 debug_printf("no retry data available\n");
6149 /* Scan the current batch of new addresses, to handle pipes, files and
6150 autoreplies, and determine which others are ready for routing. */
6157 dbdata_retry *domain_retry_record;
6158 dbdata_retry *address_retry_record;
6161 addr_new = addr->next;
6163 DEBUG(D_deliver|D_retry|D_route)
6165 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6166 debug_printf("Considering: %s\n", addr->address);
6169 /* Handle generated address that is a pipe or a file or an autoreply. */
6171 if (testflag(addr, af_pfr))
6173 /* If an autoreply in a filter could not generate a syntactically valid
6174 address, give up forthwith. Set af_ignore_error so that we don't try to
6175 generate a bounce. */
6177 if (testflag(addr, af_bad_reply))
6179 addr->basic_errno = ERRNO_BADADDRESS2;
6180 addr->local_part = addr->address;
6182 US"filter autoreply generated syntactically invalid recipient";
6183 setflag(addr, af_ignore_error);
6184 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6185 continue; /* with the next new address */
6188 /* If two different users specify delivery to the same pipe or file or
6189 autoreply, there should be two different deliveries, so build a unique
6190 string that incorporates the original address, and use this for
6191 duplicate testing and recording delivery, and also for retrying. */
6194 string_sprintf("%s:%s", addr->address, addr->parent->unique +
6195 (testflag(addr->parent, af_homonym)? 3:0));
6197 addr->address_retry_key = addr->domain_retry_key =
6198 string_sprintf("T:%s", addr->unique);
6200 /* If a filter file specifies two deliveries to the same pipe or file,
6201 we want to de-duplicate, but this is probably not wanted for two mail
6202 commands to the same address, where probably both should be delivered.
6203 So, we have to invent a different unique string in that case. Just
6204 keep piling '>' characters on the front. */
6206 if (addr->address[0] == '>')
6208 while (tree_search(tree_duplicates, addr->unique))
6209 addr->unique = string_sprintf(">%s", addr->unique);
6212 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
6214 DEBUG(D_deliver|D_route)
6215 debug_printf("%s is a duplicate address: discarded\n", addr->address);
6216 addr->dupof = tnode->data.ptr;
6217 addr->next = addr_duplicate;
6218 addr_duplicate = addr;
6222 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6224 /* Check for previous delivery */
6226 if (tree_search(tree_nonrecipients, addr->unique))
6228 DEBUG(D_deliver|D_route)
6229 debug_printf("%s was previously delivered: discarded\n", addr->address);
6230 child_done(addr, tod_stamp(tod_log));
6234 /* Save for checking future duplicates */
6236 tree_add_duplicate(addr->unique, addr);
6238 /* Set local part and domain */
6240 addr->local_part = addr->address;
6241 addr->domain = addr->parent->domain;
6243 /* Ensure that the delivery is permitted. */
6245 if (testflag(addr, af_file))
6247 if (!testflag(addr, af_allow_file))
6249 addr->basic_errno = ERRNO_FORBIDFILE;
6250 addr->message = US"delivery to file forbidden";
6251 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6252 continue; /* with the next new address */
6255 else if (addr->address[0] == '|')
6257 if (!testflag(addr, af_allow_pipe))
6259 addr->basic_errno = ERRNO_FORBIDPIPE;
6260 addr->message = US"delivery to pipe forbidden";
6261 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6262 continue; /* with the next new address */
6265 else if (!testflag(addr, af_allow_reply))
6267 addr->basic_errno = ERRNO_FORBIDREPLY;
6268 addr->message = US"autoreply forbidden";
6269 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6270 continue; /* with the next new address */
6273 /* If the errno field is already set to BADTRANSPORT, it indicates
6274 failure to expand a transport string, or find the associated transport,
6275 or an unset transport when one is required. Leave this test till now so
6276 that the forbid errors are given in preference. */
6278 if (addr->basic_errno == ERRNO_BADTRANSPORT)
6280 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6284 /* Treat /dev/null as a special case and abandon the delivery. This
6285 avoids having to specify a uid on the transport just for this case.
6286 Arrange for the transport name to be logged as "**bypassed**". */
6288 if (Ustrcmp(addr->address, "/dev/null") == 0)
6290 uschar *save = addr->transport->name;
6291 addr->transport->name = US"**bypassed**";
6292 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
6293 addr->transport->name = save;
6294 continue; /* with the next new address */
6297 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
6300 DEBUG(D_deliver|D_route)
6301 debug_printf("queued for %s transport\n", addr->transport->name);
6302 addr->next = addr_local;
6304 continue; /* with the next new address */
6307 /* Handle normal addresses. First, split up into local part and domain,
6308 handling the %-hack if necessary. There is the possibility of a defer from
6309 a lookup in percent_hack_domains. */
6311 if ((rc = deliver_split_address(addr)) == DEFER)
6313 addr->message = US"cannot check percent_hack_domains";
6314 addr->basic_errno = ERRNO_LISTDEFER;
6315 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6319 /* Check to see if the domain is held. If so, proceed only if the
6320 delivery was forced by hand. */
6322 deliver_domain = addr->domain; /* set $domain */
6323 if ( !forced && hold_domains
6324 && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0,
6325 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
6331 addr->message = US"hold_domains lookup deferred";
6332 addr->basic_errno = ERRNO_LISTDEFER;
6336 addr->message = US"domain is held";
6337 addr->basic_errno = ERRNO_HELD;
6339 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6343 /* Now we can check for duplicates and previously delivered addresses. In
6344 order to do this, we have to generate a "unique" value for each address,
6345 because there may be identical actual addresses in a line of descendents.
6346 The "unique" field is initialized to the same value as the "address" field,
6347 but gets changed here to cope with identically-named descendents. */
6349 for (parent = addr->parent; parent; parent = parent->parent)
6350 if (strcmpic(addr->address, parent->address) == 0) break;
6352 /* If there's an ancestor with the same name, set the homonym flag. This
6353 influences how deliveries are recorded. Then add a prefix on the front of
6354 the unique address. We use \n\ where n starts at 0 and increases each time.
6355 It is unlikely to pass 9, but if it does, it may look odd but will still
6356 work. This means that siblings or cousins with the same names are treated
6357 as duplicates, which is what we want. */
6361 setflag(addr, af_homonym);
6362 if (parent->unique[0] != '\\')
6363 addr->unique = string_sprintf("\\0\\%s", addr->address);
6365 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
6369 /* Ensure that the domain in the unique field is lower cased, because
6370 domains are always handled caselessly. */
6372 p = Ustrrchr(addr->unique, '@');
6373 while (*p != 0) { *p = tolower(*p); p++; }
6375 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6377 if (tree_search(tree_nonrecipients, addr->unique))
6379 DEBUG(D_deliver|D_route)
6380 debug_printf("%s was previously delivered: discarded\n", addr->unique);
6381 child_done(addr, tod_stamp(tod_log));
6385 /* Get the routing retry status, saving the two retry keys (with and
6386 without the local part) for subsequent use. If there is no retry record for
6387 the standard address routing retry key, we look for the same key with the
6388 sender attached, because this form is used by the smtp transport after a
6389 4xx response to RCPT when address_retry_include_sender is true. */
6391 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
6392 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
6397 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
6398 if ( domain_retry_record
6399 && now - domain_retry_record->time_stamp > retry_data_expire
6401 domain_retry_record = NULL; /* Ignore if too old */
6403 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
6404 if ( address_retry_record
6405 && now - address_retry_record->time_stamp > retry_data_expire
6407 address_retry_record = NULL; /* Ignore if too old */
6409 if (!address_retry_record)
6411 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6413 address_retry_record = dbfn_read(dbm_file, altkey);
6414 if ( address_retry_record
6415 && now - address_retry_record->time_stamp > retry_data_expire)
6416 address_retry_record = NULL; /* Ignore if too old */
6420 domain_retry_record = address_retry_record = NULL;
6422 DEBUG(D_deliver|D_retry)
6424 if (!domain_retry_record)
6425 debug_printf("no domain retry record\n");
6426 if (!address_retry_record)
6427 debug_printf("no address retry record\n");
6430 /* If we are sending a message down an existing SMTP connection, we must
6431 assume that the message which created the connection managed to route
6432 an address to that connection. We do not want to run the risk of taking
6433 a long time over routing here, because if we do, the server at the other
6434 end of the connection may time it out. This is especially true for messages
6435 with lots of addresses. For this kind of delivery, queue_running is not
6436 set, so we would normally route all addresses. We take a pragmatic approach
6437 and defer routing any addresses that have any kind of domain retry record.
6438 That is, we don't even look at their retry times. It doesn't matter if this
6439 doesn't work occasionally. This is all just an optimization, after all.
6441 The reason for not doing the same for address retries is that they normally
6442 arise from 4xx responses, not DNS timeouts. */
6444 if (continue_hostname && domain_retry_record)
6446 addr->message = US"reusing SMTP connection skips previous routing defer";
6447 addr->basic_errno = ERRNO_RRETRY;
6448 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6451 /* If we are in a queue run, defer routing unless there is no retry data or
6452 we've passed the next retry time, or this message is forced. In other
6453 words, ignore retry data when not in a queue run.
6455 However, if the domain retry time has expired, always allow the routing
6456 attempt. If it fails again, the address will be failed. This ensures that
6457 each address is routed at least once, even after long-term routing
6460 If there is an address retry, check that too; just wait for the next
6461 retry time. This helps with the case when the temporary error on the
6462 address was really message-specific rather than address specific, since
6463 it allows other messages through.
6465 We also wait for the next retry time if this is a message sent down an
6466 existing SMTP connection (even though that will be forced). Otherwise there
6467 will be far too many attempts for an address that gets a 4xx error. In
6468 fact, after such an error, we should not get here because, the host should
6469 not be remembered as one this message needs. However, there was a bug that
6470 used to cause this to happen, so it is best to be on the safe side.
6472 Even if we haven't reached the retry time in the hints, there is one more
6473 check to do, which is for the ultimate address timeout. We only do this
6474 check if there is an address retry record and there is not a domain retry
6475 record; this implies that previous attempts to handle the address had the
6476 retry_use_local_parts option turned on. We use this as an approximation
6477 for the destination being like a local delivery, for example delivery over
6478 LMTP to an IMAP message store. In this situation users are liable to bump
6479 into their quota and thereby have intermittently successful deliveries,
6480 which keep the retry record fresh, which can lead to us perpetually
6481 deferring messages. */
6483 else if ( ( queue_running && !deliver_force
6484 || continue_hostname
6486 && ( ( domain_retry_record
6487 && now < domain_retry_record->next_try
6488 && !domain_retry_record->expired
6490 || ( address_retry_record
6491 && now < address_retry_record->next_try
6493 && ( domain_retry_record
6494 || !address_retry_record
6495 || !retry_ultimate_address_timeout(addr->address_retry_key,
6496 addr->domain, address_retry_record, now)
6499 addr->message = US"retry time not reached";
6500 addr->basic_errno = ERRNO_RRETRY;
6501 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6504 /* The domain is OK for routing. Remember if retry data exists so it
6505 can be cleaned up after a successful delivery. */
6509 if (domain_retry_record || address_retry_record)
6510 setflag(addr, af_dr_retry_exists);
6511 addr->next = addr_route;
6513 DEBUG(D_deliver|D_route)
6514 debug_printf("%s: queued for routing\n", addr->address);
6518 /* The database is closed while routing is actually happening. Requests to
6519 update it are put on a chain and all processed together at the end. */
6521 if (dbm_file) dbfn_close(dbm_file);
6523 /* If queue_domains is set, we don't even want to try routing addresses in
6524 those domains. During queue runs, queue_domains is forced to be unset.
6525 Optimize by skipping this pass through the addresses if nothing is set. */
6527 if (!deliver_force && queue_domains)
6529 address_item *okaddr = NULL;
6532 address_item *addr = addr_route;
6533 addr_route = addr->next;
6535 deliver_domain = addr->domain; /* set $domain */
6536 if ((rc = match_isinlist(addr->domain, (const uschar **)&queue_domains, 0,
6537 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
6542 addr->basic_errno = ERRNO_LISTDEFER;
6543 addr->message = US"queue_domains lookup deferred";
6544 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6548 addr->next = okaddr;
6554 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
6555 addr->message = US"domain is in queue_domains";
6556 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6560 addr_route = okaddr;
6563 /* Now route those addresses that are not deferred. */
6568 address_item *addr = addr_route;
6569 const uschar *old_domain = addr->domain;
6570 uschar *old_unique = addr->unique;
6571 addr_route = addr->next;
6574 /* Just in case some router parameter refers to it. */
6576 if (!(return_path = addr->prop.errors_address))
6577 return_path = sender_address;
6579 /* If a router defers an address, add a retry item. Whether or not to
6580 use the local part in the key is a property of the router. */
6582 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
6583 &addr_succeed, v_none)) == DEFER)
6584 retry_add_item(addr,
6585 addr->router->retry_use_local_part
6586 ? string_sprintf("R:%s@%s", addr->local_part, addr->domain)
6587 : string_sprintf("R:%s", addr->domain),
6590 /* Otherwise, if there is an existing retry record in the database, add
6591 retry items to delete both forms. We must also allow for the possibility
6592 of a routing retry that includes the sender address. Since the domain might
6593 have been rewritten (expanded to fully qualified) as a result of routing,
6594 ensure that the rewritten form is also deleted. */
6596 else if (testflag(addr, af_dr_retry_exists))
6598 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6600 retry_add_item(addr, altkey, rf_delete);
6601 retry_add_item(addr, addr->address_retry_key, rf_delete);
6602 retry_add_item(addr, addr->domain_retry_key, rf_delete);
6603 if (Ustrcmp(addr->domain, old_domain) != 0)
6604 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
6607 /* DISCARD is given for :blackhole: and "seen finish". The event has been
6608 logged, but we need to ensure the address (and maybe parents) is marked
6613 address_done(addr, tod_stamp(tod_log));
6614 continue; /* route next address */
6617 /* The address is finished with (failed or deferred). */
6621 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
6622 continue; /* route next address */
6625 /* The address has been routed. If the router changed the domain, it will
6626 also have changed the unique address. We have to test whether this address
6627 has already been delivered, because it's the unique address that finally
6630 if ( addr->unique != old_unique
6631 && tree_search(tree_nonrecipients, addr->unique) != 0
6634 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
6635 "discarded\n", addr->address);
6636 if (addr_remote == addr) addr_remote = addr->next;
6637 else if (addr_local == addr) addr_local = addr->next;
6640 /* If the router has same_domain_copy_routing set, we are permitted to copy
6641 the routing for any other addresses with the same domain. This is an
6642 optimisation to save repeated DNS lookups for "standard" remote domain
6643 routing. The option is settable only on routers that generate host lists.
6644 We play it very safe, and do the optimization only if the address is routed
6645 to a remote transport, there are no header changes, and the domain was not
6646 modified by the router. */
6648 if ( addr_remote == addr
6649 && addr->router->same_domain_copy_routing
6650 && !addr->prop.extra_headers
6651 && !addr->prop.remove_headers
6652 && old_domain == addr->domain
6655 address_item **chain = &addr_route;
6658 address_item *addr2 = *chain;
6659 if (Ustrcmp(addr2->domain, addr->domain) != 0)
6661 chain = &(addr2->next);
6665 /* Found a suitable address; take it off the routing list and add it to
6666 the remote delivery list. */
6668 *chain = addr2->next;
6669 addr2->next = addr_remote;
6670 addr_remote = addr2;
6672 /* Copy the routing data */
6674 addr2->domain = addr->domain;
6675 addr2->router = addr->router;
6676 addr2->transport = addr->transport;
6677 addr2->host_list = addr->host_list;
6678 addr2->fallback_hosts = addr->fallback_hosts;
6679 addr2->prop.errors_address = addr->prop.errors_address;
6680 copyflag(addr2, addr, af_hide_child | af_local_host_removed);
6682 DEBUG(D_deliver|D_route)
6684 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6686 "Routing for %s copied from %s\n",
6687 addr2->address, addr2->address, addr->address);
6691 } /* Continue with routing the next address. */
6692 } /* Loop to process any child addresses that the routers created, and
6693 any rerouted addresses that got put back on the new chain. */
6696 /* Debugging: show the results of the routing */
6698 DEBUG(D_deliver|D_retry|D_route)
6701 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6702 debug_printf("After routing:\n Local deliveries:\n");
6703 for (p = addr_local; p; p = p->next)
6704 debug_printf(" %s\n", p->address);
6706 debug_printf(" Remote deliveries:\n");
6707 for (p = addr_remote; p; p = p->next)
6708 debug_printf(" %s\n", p->address);
6710 debug_printf(" Failed addresses:\n");
6711 for (p = addr_failed; p; p = p->next)
6712 debug_printf(" %s\n", p->address);
6714 debug_printf(" Deferred addresses:\n");
6715 for (p = addr_defer; p; p = p->next)
6716 debug_printf(" %s\n", p->address);
6719 /* Free any resources that were cached during routing. */
6724 /* These two variables are set only during routing, after check_local_user.
6725 Ensure they are not set in transports. */
6727 local_user_gid = (gid_t)(-1);
6728 local_user_uid = (uid_t)(-1);
6730 /* Check for any duplicate addresses. This check is delayed until after
6731 routing, because the flexibility of the routing configuration means that
6732 identical addresses with different parentage may end up being redirected to
6733 different addresses. Checking for duplicates too early (as we previously used
6734 to) makes this kind of thing not work. */
6736 do_duplicate_check(&addr_local);
6737 do_duplicate_check(&addr_remote);
6739 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
6740 remote transport. The check that they all end up in one transaction happens in
6741 the do_remote_deliveries() function. */
6744 && (addr_local || addr_failed || addr_defer)
6748 uschar *which, *colon, *msg;
6755 else if (addr_defer)
6758 which = US"deferred";
6766 while (addr->parent) addr = addr->parent;
6771 msg = addr->message;
6773 else colon = msg = US"";
6775 /* We don't need to log here for a forced failure as it will already
6776 have been logged. Defer will also have been logged, but as a defer, so we do
6777 need to do the failure logging. */
6779 if (addr != addr_failed)
6780 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
6781 addr->address, which);
6783 /* Always write an error to the caller */
6785 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
6788 final_yield = DELIVER_MUA_FAILED;
6789 addr_failed = addr_defer = NULL; /* So that we remove the message */
6790 goto DELIVERY_TIDYUP;
6794 /* If this is a run to continue deliveries to an external channel that is
6795 already set up, defer any local deliveries. */
6797 if (continue_transport)
6801 address_item *addr = addr_defer;
6802 while (addr->next) addr = addr->next;
6803 addr->next = addr_local;
6806 addr_defer = addr_local;
6811 /* Because address rewriting can happen in the routers, we should not really do
6812 ANY deliveries until all addresses have been routed, so that all recipients of
6813 the message get the same headers. However, this is in practice not always
6814 possible, since sometimes remote addresses give DNS timeouts for days on end.
6815 The pragmatic approach is to deliver what we can now, saving any rewritten
6816 headers so that at least the next lot of recipients benefit from the rewriting
6817 that has already been done.
6819 If any headers have been rewritten during routing, update the spool file to
6820 remember them for all subsequent deliveries. This can be delayed till later if
6821 there is only address to be delivered - if it succeeds the spool write need not
6824 if ( header_rewritten
6826 && (addr_local->next || addr_remote)
6828 || (addr_remote && addr_remote->next)
6831 /* Panic-dies on error */
6832 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6833 header_rewritten = FALSE;
6837 /* If there are any deliveries to be done, open the journal file. This is used
6838 to record successful deliveries as soon as possible after each delivery is
6839 known to be complete. A file opened with O_APPEND is used so that several
6840 processes can run simultaneously.
6842 The journal is just insurance against crashes. When the spool file is
6843 ultimately updated at the end of processing, the journal is deleted. If a
6844 journal is found to exist at the start of delivery, the addresses listed
6845 therein are added to the non-recipients. */
6847 if (addr_local || addr_remote)
6849 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
6851 if ((journal_fd = Uopen(fname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE)) <0)
6853 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
6854 fname, strerror(errno));
6855 return DELIVER_NOT_ATTEMPTED;
6858 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
6859 that the mode is correct - the group setting doesn't always seem to get
6860 set automatically. */
6862 if( fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
6863 || fchown(journal_fd, exim_uid, exim_gid)
6864 || fchmod(journal_fd, SPOOL_MODE)
6867 int ret = Uunlink(fname);
6868 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
6869 fname, strerror(errno));
6870 if(ret && errno != ENOENT)
6871 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6872 fname, strerror(errno));
6873 return DELIVER_NOT_ATTEMPTED;
6879 /* Now we can get down to the business of actually doing deliveries. Local
6880 deliveries are done first, then remote ones. If ever the problems of how to
6881 handle fallback transports are figured out, this section can be put into a loop
6882 for handling fallbacks, though the uid switching will have to be revised. */
6884 /* Precompile a regex that is used to recognize a parameter in response
6885 to an LHLO command, if is isn't already compiled. This may be used on both
6886 local and remote LMTP deliveries. */
6888 if (!regex_IGNOREQUOTA)
6890 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
6892 /* Handle local deliveries */
6896 DEBUG(D_deliver|D_transport)
6897 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
6898 do_local_deliveries();
6899 disable_logging = FALSE;
6902 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
6903 so just queue them all. */
6905 if (queue_run_local)
6908 address_item *addr = addr_remote;
6909 addr_remote = addr->next;
6911 addr->basic_errno = ERRNO_LOCAL_ONLY;
6912 addr->message = US"remote deliveries suppressed";
6913 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
6916 /* Handle remote deliveries */
6920 DEBUG(D_deliver|D_transport)
6921 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
6923 /* Precompile some regex that are used to recognize parameters in response
6924 to an EHLO command, if they aren't already compiled. */
6928 /* Now sort the addresses if required, and do the deliveries. The yield of
6929 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
6930 cannot be delivered in one transaction. */
6932 if (remote_sort_domains) sort_remote_deliveries();
6933 if (!do_remote_deliveries(FALSE))
6935 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
6936 "be delivered in one transaction");
6937 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
6939 final_yield = DELIVER_MUA_FAILED;
6940 addr_failed = addr_defer = NULL; /* So that we remove the message */
6941 goto DELIVERY_TIDYUP;
6944 /* See if any of the addresses that failed got put on the queue for delivery
6945 to their fallback hosts. We do it this way because often the same fallback
6946 host is used for many domains, so all can be sent in a single transaction
6947 (if appropriately configured). */
6949 if (addr_fallback && !mua_wrapper)
6951 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
6952 addr_remote = addr_fallback;
6953 addr_fallback = NULL;
6954 if (remote_sort_domains) sort_remote_deliveries();
6955 do_remote_deliveries(TRUE);
6957 disable_logging = FALSE;
6961 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6962 phase, to minimize cases of half-done things. */
6965 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6967 /* Root privilege is no longer needed */
6969 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
6971 set_process_info("tidying up after delivering %s", message_id);
6972 signal(SIGTERM, SIG_IGN);
6974 /* When we are acting as an MUA wrapper, the smtp transport will either have
6975 succeeded for all addresses, or failed them all in normal cases. However, there
6976 are some setup situations (e.g. when a named port does not exist) that cause an
6977 immediate exit with deferral of all addresses. Convert those into failures. We
6978 do not ever want to retry, nor do we want to send a bounce message. */
6984 address_item *addr, *nextaddr;
6985 for (addr = addr_defer; addr; addr = nextaddr)
6987 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
6988 "delivery", addr->address);
6989 nextaddr = addr->next;
6990 addr->next = addr_failed;
6996 /* Now all should either have succeeded or failed. */
6999 final_yield = DELIVER_MUA_SUCCEEDED;
7003 uschar *s = addr_failed->user_message;
7005 if (!s) s = addr_failed->message;
7007 fprintf(stderr, "Delivery failed: ");
7008 if (addr_failed->basic_errno > 0)
7010 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
7011 if (s) fprintf(stderr, ": ");
7013 if ((host = addr_failed->host_used))
7014 fprintf(stderr, "H=%s [%s]: ", host->name, host->address);
7016 fprintf(stderr, "%s", CS s);
7017 else if (addr_failed->basic_errno <= 0)
7018 fprintf(stderr, "unknown error");
7019 fprintf(stderr, "\n");
7021 final_yield = DELIVER_MUA_FAILED;
7026 /* In a normal configuration, we now update the retry database. This is done in
7027 one fell swoop at the end in order not to keep opening and closing (and
7028 locking) the database. The code for handling retries is hived off into a
7029 separate module for convenience. We pass it the addresses of the various
7030 chains, because deferred addresses can get moved onto the failed chain if the
7031 retry cutoff time has expired for all alternative destinations. Bypass the
7032 updating of the database if the -N flag is set, which is a debugging thing that
7033 prevents actual delivery. */
7035 else if (!dont_deliver)
7036 retry_update(&addr_defer, &addr_failed, &addr_succeed);
7038 /* Send DSN for successful messages if requested */
7039 addr_senddsn = NULL;
7041 for (addr_dsntmp = addr_succeed; addr_dsntmp; addr_dsntmp = addr_dsntmp->next)
7043 /* af_ignore_error not honored here. it's not an error */
7044 DEBUG(D_deliver) debug_printf("DSN: processing router : %s\n"
7045 "DSN: processing successful delivery address: %s\n"
7046 "DSN: Sender_address: %s\n"
7047 "DSN: orcpt: %s flags: %d\n"
7048 "DSN: envid: %s ret: %d\n"
7049 "DSN: Final recipient: %s\n"
7050 "DSN: Remote SMTP server supports DSN: %d\n",
7051 addr_dsntmp->router->name,
7052 addr_dsntmp->address,
7054 addr_dsntmp->dsn_orcpt, addr_dsntmp->dsn_flags,
7056 addr_dsntmp->address,
7057 addr_dsntmp->dsn_aware
7060 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
7061 and a report was requested */
7062 if ( ( addr_dsntmp->dsn_aware != dsn_support_yes
7063 || addr_dsntmp->dsn_flags & rf_dsnlasthop
7065 && addr_dsntmp->dsn_flags & rf_dsnflags
7066 && addr_dsntmp->dsn_flags & rf_notify_success
7069 /* copy and relink address_item and send report with all of them at once later */
7070 address_item *addr_next;
7071 addr_next = addr_senddsn;
7072 addr_senddsn = store_get(sizeof(address_item));
7073 memcpy(addr_senddsn, addr_dsntmp, sizeof(address_item));
7074 addr_senddsn->next = addr_next;
7077 DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n");
7085 /* create exim process to send message */
7086 pid = child_open_exim(&fd);
7088 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
7090 if (pid < 0) /* Creation of child failed */
7092 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7093 "create child process to send failure message: %s", getpid(),
7094 getppid(), strerror(errno));
7096 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
7098 else /* Creation of child succeeded */
7100 FILE *f = fdopen(fd, "wb");
7101 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7106 debug_printf("sending error message to: %s\n", sender_address);
7108 /* build unique id for MIME boundary */
7109 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7110 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound);
7112 if (errors_reply_to)
7113 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7115 fprintf(f, "Auto-Submitted: auto-generated\n"
7116 "From: Mail Delivery System <Mailer-Daemon@%s>\n"
7118 "Subject: Delivery Status Notification\n"
7119 "Content-Type: multipart/report; report-type=delivery-status; boundary=%s\n"
7120 "MIME-Version: 1.0\n\n"
7123 "Content-type: text/plain; charset=us-ascii\n\n"
7125 "This message was created automatically by mail delivery software.\n"
7126 " ----- The following addresses had successful delivery notifications -----\n",
7127 qualify_domain_sender, sender_address, bound, bound);
7129 for (addr_dsntmp = addr_senddsn; addr_dsntmp;
7130 addr_dsntmp = addr_dsntmp->next)
7131 fprintf(f, "<%s> (relayed %s)\n\n",
7132 addr_dsntmp->address,
7133 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1
7134 ? "via non DSN router"
7135 : addr_dsntmp->dsn_aware == dsn_support_no
7136 ? "to non-DSN-aware mailer"
7137 : "via non \"Remote SMTP\" router"
7141 "Content-type: message/delivery-status\n\n"
7142 "Reporting-MTA: dns; %s\n",
7143 bound, smtp_active_hostname);
7146 { /* must be decoded from xtext: see RFC 3461:6.3a */
7148 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7149 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7151 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7155 for (addr_dsntmp = addr_senddsn;
7157 addr_dsntmp = addr_dsntmp->next)
7159 if (addr_dsntmp->dsn_orcpt)
7160 fprintf(f,"Original-Recipient: %s\n", addr_dsntmp->dsn_orcpt);
7162 fprintf(f, "Action: delivered\n"
7163 "Final-Recipient: rfc822;%s\n"
7165 addr_dsntmp->address);
7167 if (addr_dsntmp->host_used && addr_dsntmp->host_used->name)
7168 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n",
7169 addr_dsntmp->host_used->name);
7171 fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n",
7172 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1 ? "DSN" : "SMTP");
7175 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound);
7178 transport_filter_argv = NULL; /* Just in case */
7179 return_path = sender_address; /* In case not previously set */
7181 /* Write the original email out */
7183 bzero(&tctx, sizeof(tctx));
7184 tctx.options = topt_add_return_path | topt_no_body;
7185 transport_write_message(fileno(f), &tctx, 0);
7188 fprintf(f,"\n--%s--\n", bound);
7192 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7196 /* If any addresses failed, we must send a message to somebody, unless
7197 af_ignore_error is set, in which case no action is taken. It is possible for
7198 several messages to get sent if there are addresses with different
7205 uschar *logtod = tod_stamp(tod_log);
7207 address_item *handled_addr = NULL;
7208 address_item **paddr;
7209 address_item *msgchain = NULL;
7210 address_item **pmsgchain = &msgchain;
7212 /* There are weird cases when logging is disabled in the transport. However,
7213 there may not be a transport (address failed by a router). */
7215 disable_logging = FALSE;
7216 if (addr_failed->transport)
7217 disable_logging = addr_failed->transport->disable_logging;
7220 debug_printf("processing failed address %s\n", addr_failed->address);
7222 /* There are only two ways an address in a bounce message can get here:
7224 (1) When delivery was initially deferred, but has now timed out (in the call
7225 to retry_update() above). We can detect this by testing for
7226 af_retry_timedout. If the address does not have its own errors address,
7227 we arrange to ignore the error.
7229 (2) If delivery failures for bounce messages are being ignored. We can detect
7230 this by testing for af_ignore_error. This will also be set if a bounce
7231 message has been autothawed and the ignore_bounce_errors_after time has
7232 passed. It might also be set if a router was explicitly configured to
7233 ignore errors (errors_to = "").
7235 If neither of these cases obtains, something has gone wrong. Log the
7236 incident, but then ignore the error. */
7238 if (sender_address[0] == 0 && !addr_failed->prop.errors_address)
7240 if ( !testflag(addr_failed, af_retry_timedout)
7241 && !testflag(addr_failed, af_ignore_error))
7243 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
7244 "failure is neither frozen nor ignored (it's been ignored)");
7246 setflag(addr_failed, af_ignore_error);
7249 /* If the first address on the list has af_ignore_error set, just remove
7250 it from the list, throw away any saved message file, log it, and
7251 mark the recipient done. */
7253 if ( testflag(addr_failed, af_ignore_error)
7254 || ( addr_failed->dsn_flags & rf_dsnflags
7255 && (addr_failed->dsn_flags & rf_notify_failure) != rf_notify_failure
7259 addr_failed = addr->next;
7260 if (addr->return_filename) Uunlink(addr->return_filename);
7262 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
7264 !addr->parent ? US"" : US" <",
7265 !addr->parent ? US"" : addr->parent->address,
7266 !addr->parent ? US"" : US">");
7268 address_done(addr, logtod);
7269 child_done(addr, logtod);
7270 /* Panic-dies on error */
7271 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7274 /* Otherwise, handle the sending of a message. Find the error address for
7275 the first address, then send a message that includes all failed addresses
7276 that have the same error address. Note the bounce_recipient is a global so
7277 that it can be accesssed by $bounce_recipient while creating a customized
7282 if (!(bounce_recipient = addr_failed->prop.errors_address))
7283 bounce_recipient = sender_address;
7285 /* Make a subprocess to send a message */
7287 if ((pid = child_open_exim(&fd)) < 0)
7288 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7289 "create child process to send failure message: %s", getpid(),
7290 getppid(), strerror(errno));
7292 /* Creation of child succeeded */
7299 uschar *bcc, *emf_text;
7300 FILE *f = fdopen(fd, "wb");
7302 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
7303 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
7304 DELIVER_IN_BUFFER_SIZE;
7306 uschar *dsnlimitmsg;
7307 uschar *dsnnotifyhdr;
7311 debug_printf("sending error message to: %s\n", bounce_recipient);
7313 /* Scan the addresses for all that have the same errors address, removing
7314 them from the addr_failed chain, and putting them on msgchain. */
7316 paddr = &addr_failed;
7317 for (addr = addr_failed; addr; addr = *paddr)
7318 if (Ustrcmp(bounce_recipient, addr->prop.errors_address
7319 ? addr->prop.errors_address : sender_address) == 0)
7320 { /* The same - dechain */
7321 *paddr = addr->next;
7324 pmsgchain = &(addr->next);
7327 paddr = &addr->next; /* Not the same; skip */
7329 /* Include X-Failed-Recipients: for automatic interpretation, but do
7330 not let any one header line get too long. We do this by starting a
7331 new header every 50 recipients. Omit any addresses for which the
7332 "hide_child" flag is set. */
7334 for (addr = msgchain; addr; addr = addr->next)
7336 if (testflag(addr, af_hide_child)) continue;
7344 ? "X-Failed-Recipients: "
7346 testflag(addr, af_pfr) && addr->parent
7347 ? string_printing(addr->parent->address)
7348 : string_printing(addr->address));
7350 if (rcount > 0) fprintf(f, "\n");
7352 /* Output the standard headers */
7354 if (errors_reply_to)
7355 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7356 fprintf(f, "Auto-Submitted: auto-replied\n");
7358 fprintf(f, "To: %s\n", bounce_recipient);
7360 /* generate boundary string and output MIME-Headers */
7361 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7363 fprintf(f, "Content-Type: multipart/report;"
7364 " report-type=delivery-status; boundary=%s\n"
7365 "MIME-Version: 1.0\n",
7368 /* Open a template file if one is provided. Log failure to open, but
7369 carry on - default texts will be used. */
7371 if (bounce_message_file)
7372 if (!(emf = Ufopen(bounce_message_file, "rb")))
7373 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
7374 "message texts: %s", bounce_message_file, strerror(errno));
7376 /* Quietly copy to configured additional addresses if required. */
7378 if ((bcc = moan_check_errorcopy(bounce_recipient)))
7379 fprintf(f, "Bcc: %s\n", bcc);
7381 /* The texts for the message can be read from a template file; if there
7382 isn't one, or if it is too short, built-in texts are used. The first
7383 emf text is a Subject: and any other headers. */
7385 if ((emf_text = next_emf(emf, US"header")))
7386 fprintf(f, "%s\n", emf_text);
7388 fprintf(f, "Subject: Mail delivery failed%s\n\n",
7389 to_sender? ": returning message to sender" : "");
7391 /* output human readable part as text/plain section */
7393 "Content-type: text/plain; charset=us-ascii\n\n",
7396 if ((emf_text = next_emf(emf, US"intro")))
7397 fprintf(f, "%s", CS emf_text);
7401 /* This message has been reworded several times. It seems to be confusing to
7402 somebody, however it is worded. I have retreated to the original, simple
7404 "This message was created automatically by mail delivery software.\n");
7406 if (bounce_message_text)
7407 fprintf(f, "%s", CS bounce_message_text);
7410 "\nA message that you sent could not be delivered to one or more of its\n"
7411 "recipients. This is a permanent error. The following address(es) failed:\n");
7414 "\nA message sent by\n\n <%s>\n\n"
7415 "could not be delivered to one or more of its recipients. The following\n"
7416 "address(es) failed:\n", sender_address);
7420 /* Process the addresses, leaving them on the msgchain if they have a
7421 file name for a return message. (There has already been a check in
7422 post_process_one() for the existence of data in the message file.) A TRUE
7423 return from print_address_information() means that the address is not
7427 for (addr = msgchain; addr; addr = *paddr)
7429 if (print_address_information(addr, f, US" ", US"\n ", US""))
7430 print_address_error(addr, f, US"");
7432 /* End the final line for the address */
7436 /* Leave on msgchain if there's a return file. */
7438 if (addr->return_file >= 0)
7440 paddr = &(addr->next);
7444 /* Else save so that we can tick off the recipient when the
7449 *paddr = addr->next;
7450 addr->next = handled_addr;
7451 handled_addr = addr;
7457 /* Get the next text, whether we need it or not, so as to be
7458 positioned for the one after. */
7460 emf_text = next_emf(emf, US"generated text");
7462 /* If there were any file messages passed by the local transports,
7463 include them in the message. Then put the address on the handled chain.
7464 In the case of a batch of addresses that were all sent to the same
7465 transport, the return_file field in all of them will contain the same
7466 fd, and the return_filename field in the *last* one will be set (to the
7467 name of the file). */
7471 address_item *nextaddr;
7474 fprintf(f, "%s", CS emf_text);
7477 "The following text was generated during the delivery "
7478 "attempt%s:\n", (filecount > 1)? "s" : "");
7480 for (addr = msgchain; addr; addr = nextaddr)
7483 address_item *topaddr = addr;
7485 /* List all the addresses that relate to this file */
7488 while(addr) /* Insurance */
7490 print_address_information(addr, f, US"------ ", US"\n ",
7492 if (addr->return_filename) break;
7497 /* Now copy the file */
7499 if (!(fm = Ufopen(addr->return_filename, "rb")))
7500 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
7504 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
7507 Uunlink(addr->return_filename);
7509 /* Can now add to handled chain, first fishing off the next
7510 address on the msgchain. */
7512 nextaddr = addr->next;
7513 addr->next = handled_addr;
7514 handled_addr = topaddr;
7519 /* output machine readable part */
7521 if (message_smtputf8)
7523 "Content-type: message/global-delivery-status\n\n"
7524 "Reporting-MTA: dns; %s\n",
7525 bound, smtp_active_hostname);
7529 "Content-type: message/delivery-status\n\n"
7530 "Reporting-MTA: dns; %s\n",
7531 bound, smtp_active_hostname);
7535 /* must be decoded from xtext: see RFC 3461:6.3a */
7537 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7538 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7540 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7544 for (addr = handled_addr; addr; addr = addr->next)
7547 fprintf(f, "Action: failed\n"
7548 "Final-Recipient: rfc822;%s\n"
7551 if ((hu = addr->host_used) && hu->name)
7554 fprintf(f, "Remote-MTA: dns; %s\n", hu->name);
7555 #ifdef EXPERIMENTAL_DSN_INFO
7558 uschar * p = hu->port == 25
7559 ? US"" : string_sprintf(":%d", hu->port);
7560 fprintf(f, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p);
7562 if ((s = addr->smtp_greeting) && *s)
7563 fprintf(f, "X-Remote-MTA-smtp-greeting: X-str; %s\n", s);
7564 if ((s = addr->helo_response) && *s)
7565 fprintf(f, "X-Remote-MTA-helo-response: X-str; %s\n", s);
7566 if ((s = addr->message) && *s)
7567 fprintf(f, "X-Exim-Diagnostic: X-str; %s\n", s);
7569 print_dsn_diagnostic_code(addr, f);
7574 /* Now copy the message, trying to give an intelligible comment if
7575 it is too long for it all to be copied. The limit isn't strictly
7576 applied because of the buffering. There is, however, an option
7577 to suppress copying altogether. */
7579 emf_text = next_emf(emf, US"copy");
7582 we ignore the intro text from template and add
7583 the text for bounce_return_size_limit at the end.
7585 bounce_return_message is ignored
7586 in case RET= is defined we honor these values
7587 otherwise bounce_return_body is honored.
7589 bounce_return_size_limit is always honored.
7592 fprintf(f, "--%s\n", bound);
7594 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7595 dsnnotifyhdr = NULL;
7596 topt = topt_add_return_path;
7598 /* RET=HDRS? top priority */
7599 if (dsn_ret == dsn_ret_hdrs)
7600 topt |= topt_no_body;
7603 struct stat statbuf;
7605 /* no full body return at all? */
7606 if (!bounce_return_body)
7608 topt |= topt_no_body;
7609 /* add header if we overrule RET=FULL */
7610 if (dsn_ret == dsn_ret_full)
7611 dsnnotifyhdr = dsnlimitmsg;
7613 /* line length limited... return headers only if oversize */
7614 /* size limited ... return headers only if limit reached */
7615 else if ( max_received_linelength > bounce_return_linesize_limit
7616 || ( bounce_return_size_limit > 0
7617 && fstat(deliver_datafile, &statbuf) == 0
7618 && statbuf.st_size > max
7621 topt |= topt_no_body;
7622 dsnnotifyhdr = dsnlimitmsg;
7627 if (message_smtputf8)
7628 fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n"
7629 : "Content-type: message/global\n\n",
7633 fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n"
7634 : "Content-type: message/rfc822\n\n",
7638 transport_filter_argv = NULL; /* Just in case */
7639 return_path = sender_address; /* In case not previously set */
7640 { /* Dummy transport for headers add */
7641 transport_ctx * tctx =
7642 store_get(sizeof(*tctx) + sizeof(transport_instance));
7643 transport_instance * tb = (transport_instance *)(tctx+1);
7645 bzero(tctx, sizeof(*tctx)+sizeof(*tb));
7647 tctx->options = topt;
7648 tb->add_headers = dsnnotifyhdr;
7650 transport_write_message(fileno(f), tctx, 0);
7654 /* we never add the final text. close the file */
7658 fprintf(f, "\n--%s--\n", bound);
7660 /* Close the file, which should send an EOF to the child process
7661 that is receiving the message. Wait for it to finish. */
7664 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7666 /* In the test harness, let the child do it's thing first. */
7668 if (running_in_test_harness) millisleep(500);
7670 /* If the process failed, there was some disaster in setting up the
7671 error message. Unless the message is very old, ensure that addr_defer
7672 is non-null, which will have the effect of leaving the message on the
7673 spool. The failed addresses will get tried again next time. However, we
7674 don't really want this to happen too often, so freeze the message unless
7675 there are some genuine deferred addresses to try. To do this we have
7676 to call spool_write_header() here, because with no genuine deferred
7677 addresses the normal code below doesn't get run. */
7682 if (now - received_time < retry_maximum_timeout && !addr_defer)
7684 addr_defer = (address_item *)(+1);
7685 deliver_freeze = TRUE;
7686 deliver_frozen_at = time(NULL);
7687 /* Panic-dies on error */
7688 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7691 deliver_msglog("Process failed (%d) when writing error message "
7692 "to %s%s", rc, bounce_recipient, s);
7693 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
7694 "to %s%s", rc, bounce_recipient, s);
7697 /* The message succeeded. Ensure that the recipients that failed are
7698 now marked finished with on the spool and their parents updated. */
7702 for (addr = handled_addr; addr; addr = addr->next)
7704 address_done(addr, logtod);
7705 child_done(addr, logtod);
7707 /* Panic-dies on error */
7708 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7714 disable_logging = FALSE; /* In case left set */
7716 /* Come here from the mua_wrapper case if routing goes wrong */
7720 /* If there are now no deferred addresses, we are done. Preserve the
7721 message log if so configured, and we are using them. Otherwise, sling it.
7722 Then delete the message itself. */
7730 fname = spool_fname(US"msglog", message_subdir, id, US"");
7731 if (preserve_message_logs)
7734 uschar * moname = spool_fname(US"msglog.OLD", US"", id, US"");
7736 if ((rc = Urename(fname, moname)) < 0)
7738 (void)directory_make(spool_directory,
7739 spool_sname(US"msglog.OLD", US""),
7740 MSGLOG_DIRECTORY_MODE, TRUE);
7741 rc = Urename(fname, moname);
7744 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
7745 "msglog.OLD directory", fname);
7748 if (Uunlink(fname) < 0)
7749 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7750 fname, strerror(errno));
7753 /* Remove the two message files. */
7755 fname = spool_fname(US"input", message_subdir, id, US"-D");
7756 if (Uunlink(fname) < 0)
7757 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7758 fname, strerror(errno));
7759 fname = spool_fname(US"input", message_subdir, id, US"-H");
7760 if (Uunlink(fname) < 0)
7761 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7762 fname, strerror(errno));
7764 /* Log the end of this message, with queue time if requested. */
7766 if (LOGGING(queue_time_overall))
7767 log_write(0, LOG_MAIN, "Completed QT=%s",
7768 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
7770 log_write(0, LOG_MAIN, "Completed");
7772 /* Unset deliver_freeze so that we won't try to move the spool files further down */
7773 deliver_freeze = FALSE;
7775 #ifndef DISABLE_EVENT
7776 (void) event_raise(event_action, US"msg:complete", NULL);
7780 /* If there are deferred addresses, we are keeping this message because it is
7781 not yet completed. Lose any temporary files that were catching output from
7782 pipes for any of the deferred addresses, handle one-time aliases, and see if
7783 the message has been on the queue for so long that it is time to send a warning
7784 message to the sender, unless it is a mailer-daemon. If all deferred addresses
7785 have the same domain, we can set deliver_domain for the expansion of
7786 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
7787 the parent's domain.
7789 If all the deferred addresses have an error number that indicates "retry time
7790 not reached", skip sending the warning message, because it won't contain the
7791 reason for the delay. It will get sent at the next real delivery attempt.
7792 However, if at least one address has tried, we'd better include all of them in
7795 If we can't make a process to send the message, don't worry.
7797 For mailing list expansions we want to send the warning message to the
7798 mailing list manager. We can't do a perfect job here, as some addresses may
7799 have different errors addresses, but if we take the errors address from
7800 each deferred address it will probably be right in most cases.
7802 If addr_defer == +1, it means there was a problem sending an error message
7803 for failed addresses, and there were no "real" deferred addresses. The value
7804 was set just to keep the message on the spool, so there is nothing to do here.
7807 else if (addr_defer != (address_item *)(+1))
7810 uschar *recipients = US"";
7811 BOOL delivery_attempted = FALSE;
7813 deliver_domain = testflag(addr_defer, af_pfr)
7814 ? addr_defer->parent->domain : addr_defer->domain;
7816 for (addr = addr_defer; addr; addr = addr->next)
7818 address_item *otaddr;
7820 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
7824 const uschar *d = testflag(addr, af_pfr)
7825 ? addr->parent->domain : addr->domain;
7827 /* The domain may be unset for an address that has never been routed
7828 because the system filter froze the message. */
7830 if (!d || Ustrcmp(d, deliver_domain) != 0)
7831 deliver_domain = NULL;
7834 if (addr->return_filename) Uunlink(addr->return_filename);
7836 /* Handle the case of one-time aliases. If any address in the ancestry
7837 of this one is flagged, ensure it is in the recipients list, suitably
7838 flagged, and that its parent is marked delivered. */
7840 for (otaddr = addr; otaddr; otaddr = otaddr->parent)
7841 if (otaddr->onetime_parent) break;
7846 int t = recipients_count;
7848 for (i = 0; i < recipients_count; i++)
7850 uschar *r = recipients_list[i].address;
7851 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
7852 if (Ustrcmp(otaddr->address, r) == 0) break;
7855 /* Didn't find the address already in the list, and did find the
7856 ultimate parent's address in the list. After adding the recipient,
7857 update the errors address in the recipients list. */
7859 if (i >= recipients_count && t < recipients_count)
7861 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
7862 otaddr->address, otaddr->parent->address);
7863 receive_add_recipient(otaddr->address, t);
7864 recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address;
7865 tree_add_nonrecipient(otaddr->parent->address);
7866 update_spool = TRUE;
7870 /* Except for error messages, ensure that either the errors address for
7871 this deferred address or, if there is none, the sender address, is on the
7872 list of recipients for a warning message. */
7874 if (sender_address[0] != 0)
7875 if (addr->prop.errors_address)
7877 if (Ustrstr(recipients, addr->prop.errors_address) == NULL)
7878 recipients = string_sprintf("%s%s%s", recipients,
7879 (recipients[0] == 0)? "" : ",", addr->prop.errors_address);
7883 if (Ustrstr(recipients, sender_address) == NULL)
7884 recipients = string_sprintf("%s%s%s", recipients,
7885 (recipients[0] == 0)? "" : ",", sender_address);
7889 /* Send a warning message if the conditions are right. If the condition check
7890 fails because of a lookup defer, there is nothing we can do. The warning
7891 is not sent. Another attempt will be made at the next delivery attempt (if
7895 && delivery_attempted
7896 && ( ((addr_defer->dsn_flags & rf_dsnflags) == 0)
7897 || (addr_defer->dsn_flags & rf_notify_delay) == rf_notify_delay
7899 && delay_warning[1] > 0
7900 && sender_address[0] != 0
7901 && ( !delay_warning_condition
7902 || expand_check_condition(delay_warning_condition,
7903 US"delay_warning", US"option")
7909 int queue_time = time(NULL) - received_time;
7911 /* When running in the test harness, there's an option that allows us to
7912 fudge this time so as to get repeatability of the tests. Take the first
7913 time off the list. In queue runs, the list pointer gets updated in the
7916 if (running_in_test_harness && fudged_queue_times[0] != 0)
7918 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
7921 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
7922 fudged_queue_times);
7927 /* See how many warnings we should have sent by now */
7929 for (count = 0; count < delay_warning[1]; count++)
7930 if (queue_time < delay_warning[count+2]) break;
7932 show_time = delay_warning[count+1];
7934 if (count >= delay_warning[1])
7937 int last_gap = show_time;
7938 if (count > 1) last_gap -= delay_warning[count];
7939 extra = (queue_time - delay_warning[count+1])/last_gap;
7940 show_time += last_gap * extra;
7946 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
7947 debug_printf("warning counts: required %d done %d\n", count,
7951 /* We have computed the number of warnings there should have been by now.
7952 If there haven't been enough, send one, and up the count to what it should
7955 if (warning_count < count)
7959 pid_t pid = child_open_exim(&fd);
7965 FILE *f = fdopen(fd, "wb");
7969 bzero(&tctx, sizeof(tctx));
7971 if (warn_message_file)
7972 if (!(wmf = Ufopen(warn_message_file, "rb")))
7973 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
7974 "message texts: %s", warn_message_file, strerror(errno));
7976 warnmsg_recipients = recipients;
7977 warnmsg_delay = queue_time < 120*60
7978 ? string_sprintf("%d minutes", show_time/60)
7979 : string_sprintf("%d hours", show_time/3600);
7981 if (errors_reply_to)
7982 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7983 fprintf(f, "Auto-Submitted: auto-replied\n");
7985 fprintf(f, "To: %s\n", recipients);
7987 /* generated boundary string and output MIME-Headers */
7988 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7990 fprintf(f, "Content-Type: multipart/report;"
7991 " report-type=delivery-status; boundary=%s\n"
7992 "MIME-Version: 1.0\n",
7995 if ((wmf_text = next_emf(wmf, US"header")))
7996 fprintf(f, "%s\n", wmf_text);
7998 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
7999 message_id, warnmsg_delay);
8001 /* output human readable part as text/plain section */
8003 "Content-type: text/plain; charset=us-ascii\n\n",
8006 if ((wmf_text = next_emf(wmf, US"intro")))
8007 fprintf(f, "%s", CS wmf_text);
8011 "This message was created automatically by mail delivery software.\n");
8013 if (Ustrcmp(recipients, sender_address) == 0)
8015 "A message that you sent has not yet been delivered to one or more of its\n"
8016 "recipients after more than ");
8020 "A message sent by\n\n <%s>\n\n"
8021 "has not yet been delivered to one or more of its recipients after more than \n",
8024 fprintf(f, "%s on the queue on %s.\n\n"
8025 "The message identifier is: %s\n",
8026 warnmsg_delay, primary_hostname, message_id);
8028 for (h = header_list; h; h = h->next)
8029 if (strncmpic(h->text, US"Subject:", 8) == 0)
8030 fprintf(f, "The subject of the message is: %s", h->text + 9);
8031 else if (strncmpic(h->text, US"Date:", 5) == 0)
8032 fprintf(f, "The date of the message is: %s", h->text + 6);
8035 fprintf(f, "The address%s to which the message has not yet been "
8037 !addr_defer->next ? "" : "es",
8038 !addr_defer->next ? "is": "are");
8041 /* List the addresses, with error information if allowed */
8043 /* store addr_defer for machine readable part */
8044 address_item *addr_dsndefer = addr_defer;
8048 address_item *addr = addr_defer;
8049 addr_defer = addr->next;
8050 if (print_address_information(addr, f, US" ", US"\n ", US""))
8051 print_address_error(addr, f, US"Delay reason: ");
8060 if ((wmf_text = next_emf(wmf, US"final")))
8061 fprintf(f, "%s", CS wmf_text);
8067 "No action is required on your part. Delivery attempts will continue for\n"
8068 "some time, and this warning may be repeated at intervals if the message\n"
8069 "remains undelivered. Eventually the mail delivery software will give up,\n"
8070 "and when that happens, the message will be returned to you.\n");
8073 /* output machine readable part */
8074 fprintf(f, "\n--%s\n"
8075 "Content-type: message/delivery-status\n\n"
8076 "Reporting-MTA: dns; %s\n",
8078 smtp_active_hostname);
8083 /* must be decoded from xtext: see RFC 3461:6.3a */
8085 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
8086 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
8088 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
8092 for ( ; addr_dsndefer; addr_dsndefer = addr_dsndefer->next)
8094 if (addr_dsndefer->dsn_orcpt)
8095 fprintf(f, "Original-Recipient: %s\n", addr_dsndefer->dsn_orcpt);
8097 fprintf(f, "Action: delayed\n"
8098 "Final-Recipient: rfc822;%s\n"
8100 addr_dsndefer->address);
8101 if (addr_dsndefer->host_used && addr_dsndefer->host_used->name)
8103 fprintf(f, "Remote-MTA: dns; %s\n",
8104 addr_dsndefer->host_used->name);
8105 print_dsn_diagnostic_code(addr_dsndefer, f);
8111 "Content-type: text/rfc822-headers\n\n",
8115 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
8116 tctx.options = topt_add_return_path | topt_no_body;
8117 transport_filter_argv = NULL; /* Just in case */
8118 return_path = sender_address; /* In case not previously set */
8120 /* Write the original email out */
8121 transport_write_message(fileno(f), &tctx, 0);
8124 fprintf(f,"\n--%s--\n", bound);
8128 /* Close and wait for child process to complete, without a timeout.
8129 If there's an error, don't update the count. */
8132 if (child_close(pid, 0) == 0)
8134 warning_count = count;
8135 update_spool = TRUE; /* Ensure spool rewritten */
8141 /* Clear deliver_domain */
8143 deliver_domain = NULL;
8145 /* If this was a first delivery attempt, unset the first time flag, and
8146 ensure that the spool gets updated. */
8148 if (deliver_firsttime)
8150 deliver_firsttime = FALSE;
8151 update_spool = TRUE;
8154 /* If delivery was frozen and freeze_tell is set, generate an appropriate
8155 message, unless the message is a local error message (to avoid loops). Then
8156 log the freezing. If the text in "frozen_info" came from a system filter,
8157 it has been escaped into printing characters so as not to mess up log lines.
8158 For the "tell" message, we turn \n back into newline. Also, insert a newline
8159 near the start instead of the ": " string. */
8163 if (freeze_tell && freeze_tell[0] != 0 && !local_error_message)
8165 uschar *s = string_copy(frozen_info);
8166 uschar *ss = Ustrstr(s, " by the system filter: ");
8177 if (*ss == '\\' && ss[1] == 'n')
8184 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
8185 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
8189 /* Log freezing just before we update the -H file, to minimize the chance
8190 of a race problem. */
8192 deliver_msglog("*** Frozen%s\n", frozen_info);
8193 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
8196 /* If there have been any updates to the non-recipients list, or other things
8197 that get written to the spool, we must now update the spool header file so
8198 that it has the right information for the next delivery attempt. If there
8199 was more than one address being delivered, the header_change update is done
8200 earlier, in case one succeeds and then something crashes. */
8203 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
8204 update_spool, header_rewritten);
8206 if (update_spool || header_rewritten)
8207 /* Panic-dies on error */
8208 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
8211 /* Finished with the message log. If the message is complete, it will have
8212 been unlinked or renamed above. */
8214 if (message_logs) (void)fclose(message_log);
8216 /* Now we can close and remove the journal file. Its only purpose is to record
8217 successfully completed deliveries asap so that this information doesn't get
8218 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
8219 not serious, as trying it again is not harmful. The journal might not be open
8220 if all addresses were deferred at routing or directing. Nevertheless, we must
8221 remove it if it exists (may have been lying around from a crash during the
8222 previous delivery attempt). We don't remove the journal if a delivery
8223 subprocess failed to pass back delivery information; this is controlled by
8224 the remove_journal flag. When the journal is left, we also don't move the
8225 message off the main spool if frozen and the option is set. It should get moved
8226 at the next attempt, after the journal has been inspected. */
8228 if (journal_fd >= 0) (void)close(journal_fd);
8232 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
8234 if (Uunlink(fname) < 0 && errno != ENOENT)
8235 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", fname,
8238 /* Move the message off the spool if reqested */
8240 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8241 if (deliver_freeze && move_frozen_messages)
8242 (void)spool_move_message(id, message_subdir, US"", US"F");
8246 /* Closing the data file frees the lock; if the file has been unlinked it
8247 will go away. Otherwise the message becomes available for another process
8250 (void)close(deliver_datafile);
8251 deliver_datafile = -1;
8252 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
8254 /* It is unlikely that there will be any cached resources, since they are
8255 released after routing, and in the delivery subprocesses. However, it's
8256 possible for an expansion for something afterwards (for example,
8257 expand_check_condition) to do a lookup. We must therefore be sure everything is
8261 acl_where = ACL_WHERE_UNKNOWN;
8270 if (!regex_PIPELINING) regex_PIPELINING =
8271 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
8273 if (!regex_SIZE) regex_SIZE =
8274 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
8276 if (!regex_AUTH) regex_AUTH =
8277 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
8281 if (!regex_STARTTLS) regex_STARTTLS =
8282 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
8285 #ifndef DISABLE_PRDR
8286 if (!regex_PRDR) regex_PRDR =
8287 regex_must_compile(US"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE, TRUE);
8291 if (!regex_UTF8) regex_UTF8 =
8292 regex_must_compile(US"\\n250[\\s\\-]SMTPUTF8(\\s|\\n|$)", FALSE, TRUE);
8295 if (!regex_DSN) regex_DSN =
8296 regex_must_compile(US"\\n250[\\s\\-]DSN(\\s|\\n|$)", FALSE, TRUE);
8298 if (!regex_IGNOREQUOTA) regex_IGNOREQUOTA =
8299 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
8304 deliver_get_sender_address (uschar * id)
8307 uschar * new_sender_address,
8308 * save_sender_address;
8309 BOOL save_qr = queue_running;
8312 /* make spool_open_datafile non-noisy on fail */
8314 queue_running = TRUE;
8316 /* Side effect: message_subdir is set for the (possibly split) spool directory */
8318 deliver_datafile = spool_open_datafile(id);
8319 queue_running = save_qr;
8320 if (deliver_datafile < 0)
8323 /* Save and restore the global sender_address. I'm not sure if we should
8324 not save/restore all the other global variables too, because
8325 spool_read_header() may change all of them. But OTOH, when this
8326 deliver_get_sender_address() gets called, the current message is done
8327 already and nobody needs the globals anymore. (HS12, 2015-08-21) */
8329 spoolname = string_sprintf("%s-H", id);
8330 save_sender_address = sender_address;
8332 rc = spool_read_header(spoolname, TRUE, TRUE);
8334 new_sender_address = sender_address;
8335 sender_address = save_sender_address;
8337 if (rc != spool_read_OK)
8340 assert(new_sender_address);
8342 (void)close(deliver_datafile);
8343 deliver_datafile = -1;
8345 return new_sender_address;
8350 /* End of deliver.c */