1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
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;
79 static uschar spoolname[PATH_MAX];
83 /*************************************************
84 * Make a new address item *
85 *************************************************/
87 /* This function gets the store and initializes with default values. The
88 transport_return value defaults to DEFER, so that any unexpected failure to
89 deliver does not wipe out the message. The default unique string is set to a
90 copy of the address, so that its domain can be lowercased.
93 address the RFC822 address string
94 copy force a copy of the address
96 Returns: a pointer to an initialized address_item
100 deliver_make_addr(uschar *address, BOOL copy)
102 address_item *addr = store_get(sizeof(address_item));
103 *addr = address_defaults;
104 if (copy) address = string_copy(address);
105 addr->address = address;
106 addr->unique = string_copy(address);
113 /*************************************************
114 * Set expansion values for an address *
115 *************************************************/
117 /* Certain expansion variables are valid only when handling an address or
118 address list. This function sets them up or clears the values, according to its
122 addr the address in question, or NULL to clear values
127 deliver_set_expansions(address_item *addr)
131 const uschar ***p = address_expansions;
132 while (*p != NULL) **p++ = NULL;
136 /* Exactly what gets set depends on whether there is one or more addresses, and
137 what they contain. These first ones are always set, taking their values from
138 the first address. */
140 if (addr->host_list == NULL)
142 deliver_host = deliver_host_address = US"";
143 deliver_host_port = 0;
147 deliver_host = addr->host_list->name;
148 deliver_host_address = addr->host_list->address;
149 deliver_host_port = addr->host_list->port;
152 deliver_recipients = addr;
153 deliver_address_data = addr->prop.address_data;
154 deliver_domain_data = addr->prop.domain_data;
155 deliver_localpart_data = addr->prop.localpart_data;
157 /* These may be unset for multiple addresses */
159 deliver_domain = addr->domain;
160 self_hostname = addr->self_hostname;
162 #ifdef EXPERIMENTAL_BRIGHTMAIL
163 bmi_deliver = 1; /* deliver by default */
164 bmi_alt_location = NULL;
165 bmi_base64_verdict = NULL;
166 bmi_base64_tracker_verdict = NULL;
169 /* If there's only one address we can set everything. */
171 if (addr->next == NULL)
173 address_item *addr_orig;
175 deliver_localpart = addr->local_part;
176 deliver_localpart_prefix = addr->prefix;
177 deliver_localpart_suffix = addr->suffix;
179 for (addr_orig = addr; addr_orig->parent != NULL;
180 addr_orig = addr_orig->parent);
181 deliver_domain_orig = addr_orig->domain;
183 /* Re-instate any prefix and suffix in the original local part. In all
184 normal cases, the address will have a router associated with it, and we can
185 choose the caseful or caseless version accordingly. However, when a system
186 filter sets up a pipe, file, or autoreply delivery, no router is involved.
187 In this case, though, there won't be any prefix or suffix to worry about. */
189 deliver_localpart_orig = (addr_orig->router == NULL)? addr_orig->local_part :
190 addr_orig->router->caseful_local_part?
191 addr_orig->cc_local_part : addr_orig->lc_local_part;
193 /* If there's a parent, make its domain and local part available, and if
194 delivering to a pipe or file, or sending an autoreply, get the local
195 part from the parent. For pipes and files, put the pipe or file string
196 into address_pipe and address_file. */
198 if (addr->parent != NULL)
200 deliver_domain_parent = addr->parent->domain;
201 deliver_localpart_parent = (addr->parent->router == NULL)?
202 addr->parent->local_part :
203 addr->parent->router->caseful_local_part?
204 addr->parent->cc_local_part : 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);
233 /* For multiple addresses, don't set local part, and leave the domain and
234 self_hostname set only if it is the same for all of them. It is possible to
235 have multiple pipe and file addresses, but only when all addresses have routed
236 to the same pipe or file. */
241 if (testflag(addr, af_pfr))
243 if (testflag(addr, af_file)) address_file = addr->local_part;
244 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
246 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
248 if (deliver_domain != NULL &&
249 Ustrcmp(deliver_domain, addr2->domain) != 0)
250 deliver_domain = NULL;
251 if (self_hostname != NULL && (addr2->self_hostname == NULL ||
252 Ustrcmp(self_hostname, addr2->self_hostname) != 0))
253 self_hostname = NULL;
254 if (deliver_domain == NULL && self_hostname == NULL) 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)
287 sprintf(CS temp, "msglog/%s", message_subdir);
288 if (message_subdir[0] == 0) temp[6] = 0;
289 (void)directory_make(spool_directory, temp, MSGLOG_DIRECTORY_MODE, TRUE);
290 fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
293 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
294 function is called as root). Double check the mode, because the group setting
295 doesn't always get set automatically. */
299 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
300 if (fchown(fd, exim_uid, exim_gid) < 0)
305 if (fchmod(fd, mode) < 0)
311 else *error = US"create";
319 /*************************************************
320 * Write to msglog if required *
321 *************************************************/
323 /* Write to the message log, if configured. This function may also be called
327 format a string format
333 deliver_msglog(const char *format, ...)
336 if (!message_logs) return;
337 va_start(ap, format);
338 vfprintf(message_log, format, ap);
346 /*************************************************
347 * Replicate status for batch *
348 *************************************************/
350 /* When a transport handles a batch of addresses, it may treat them
351 individually, or it may just put the status in the first one, and return FALSE,
352 requesting that the status be copied to all the others externally. This is the
353 replication function. As well as the status, it copies the transport pointer,
354 which may have changed if appendfile passed the addresses on to a different
357 Argument: pointer to the first address in a chain
362 replicate_status(address_item *addr)
365 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
367 addr2->transport = addr->transport;
368 addr2->transport_return = addr->transport_return;
369 addr2->basic_errno = addr->basic_errno;
370 addr2->more_errno = addr->more_errno;
371 addr2->special_action = addr->special_action;
372 addr2->message = addr->message;
373 addr2->user_message = addr->user_message;
379 /*************************************************
380 * Compare lists of hosts *
381 *************************************************/
383 /* This function is given two pointers to chains of host items, and it yields
384 TRUE if the lists refer to the same hosts in the same order, except that
386 (1) Multiple hosts with the same non-negative MX values are permitted to appear
387 in different orders. Round-robinning nameservers can cause this to happen.
389 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
390 permitted to appear in different orders. This is caused by randomizing
393 This enables Exim to use a single SMTP transaction for sending to two entirely
394 different domains that happen to end up pointing at the same hosts.
397 one points to the first host list
398 two points to the second host list
400 Returns: TRUE if the lists refer to the same host set
404 same_hosts(host_item *one, host_item *two)
406 while (one != NULL && two != NULL)
408 if (Ustrcmp(one->name, two->name) != 0)
411 host_item *end_one = one;
412 host_item *end_two = two;
414 /* Batch up only if there was no MX and the list was not randomized */
416 if (mx == MX_NONE) return FALSE;
418 /* Find the ends of the shortest sequence of identical MX values */
420 while (end_one->next != NULL && end_one->next->mx == mx &&
421 end_two->next != NULL && end_two->next->mx == mx)
423 end_one = end_one->next;
424 end_two = end_two->next;
427 /* If there aren't any duplicates, there's no match. */
429 if (end_one == one) return FALSE;
431 /* For each host in the 'one' sequence, check that it appears in the 'two'
432 sequence, returning FALSE if not. */
437 for (hi = two; hi != end_two->next; hi = hi->next)
438 if (Ustrcmp(one->name, hi->name) == 0) break;
439 if (hi == end_two->next) return FALSE;
440 if (one == end_one) break;
444 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
445 Ensure both are pointing at the last host, and carry on as for equality. */
456 /* True if both are NULL */
463 /*************************************************
464 * Compare header lines *
465 *************************************************/
467 /* This function is given two pointers to chains of header items, and it yields
468 TRUE if they are the same header texts in the same order.
471 one points to the first header list
472 two points to the second header list
474 Returns: TRUE if the lists refer to the same header set
478 same_headers(header_line *one, header_line *two)
482 if (one == two) return TRUE; /* Includes the case where both NULL */
483 if (one == NULL || two == NULL) return FALSE;
484 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
492 /*************************************************
493 * Compare string settings *
494 *************************************************/
496 /* This function is given two pointers to strings, and it returns
497 TRUE if they are the same pointer, or if the two strings are the same.
500 one points to the first string
501 two points to the second string
503 Returns: TRUE or FALSE
507 same_strings(uschar *one, uschar *two)
509 if (one == two) return TRUE; /* Includes the case where both NULL */
510 if (one == NULL || two == NULL) return FALSE;
511 return (Ustrcmp(one, two) == 0);
516 /*************************************************
517 * Compare uid/gid for addresses *
518 *************************************************/
520 /* This function is given a transport and two addresses. It yields TRUE if the
521 uid/gid/initgroups settings for the two addresses are going to be the same when
526 addr1 the first address
527 addr2 the second address
529 Returns: TRUE or FALSE
533 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
535 if (!tp->uid_set && tp->expand_uid == NULL && !tp->deliver_as_creator)
537 if (testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set) ||
538 (testflag(addr1, af_uid_set) &&
539 (addr1->uid != addr2->uid ||
540 testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups))))
544 if (!tp->gid_set && tp->expand_gid == NULL)
546 if (testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set) ||
547 (testflag(addr1, af_gid_set) && addr1->gid != addr2->gid))
557 /*************************************************
558 * Record that an address is complete *
559 *************************************************/
561 /* This function records that an address is complete. This is straightforward
562 for most addresses, where the unique address is just the full address with the
563 domain lower cased. For homonyms (addresses that are the same as one of their
564 ancestors) their are complications. Their unique addresses have \x\ prepended
565 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
568 Exim used to record the unique addresses of homonyms as "complete". This,
569 however, fails when the pattern of redirection varies over time (e.g. if taking
570 unseen copies at only some times of day) because the prepended numbers may vary
571 from one delivery run to the next. This problem is solved by never recording
572 prepended unique addresses as complete. Instead, when a homonymic address has
573 actually been delivered via a transport, we record its basic unique address
574 followed by the name of the transport. This is checked in subsequent delivery
575 runs whenever an address is routed to a transport.
577 If the completed address is a top-level one (has no parent, which means it
578 cannot be homonymic) we also add the original address to the non-recipients
579 tree, so that it gets recorded in the spool file and therefore appears as
580 "done" in any spool listings. The original address may differ from the unique
581 address in the case of the domain.
583 Finally, this function scans the list of duplicates, marks as done any that
584 match this address, and calls child_done() for their ancestors.
587 addr address item that has been completed
588 now current time as a string
594 address_done(address_item *addr, uschar *now)
598 update_spool = TRUE; /* Ensure spool gets updated */
600 /* Top-level address */
602 if (addr->parent == NULL)
604 tree_add_nonrecipient(addr->unique);
605 tree_add_nonrecipient(addr->address);
608 /* Homonymous child address */
610 else if (testflag(addr, af_homonym))
612 if (addr->transport != NULL)
614 tree_add_nonrecipient(
615 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
619 /* Non-homonymous child address */
621 else tree_add_nonrecipient(addr->unique);
623 /* Check the list of duplicate addresses and ensure they are now marked
626 for (dup = addr_duplicate; dup != NULL; dup = dup->next)
628 if (Ustrcmp(addr->unique, dup->unique) == 0)
630 tree_add_nonrecipient(dup->unique);
631 child_done(dup, now);
639 /*************************************************
640 * Decrease counts in parents and mark done *
641 *************************************************/
643 /* This function is called when an address is complete. If there is a parent
644 address, its count of children is decremented. If there are still other
645 children outstanding, the function exits. Otherwise, if the count has become
646 zero, address_done() is called to mark the parent and its duplicates complete.
647 Then loop for any earlier ancestors.
650 addr points to the completed address item
651 now the current time as a string, for writing to the message log
657 child_done(address_item *addr, uschar *now)
660 while (addr->parent != NULL)
663 if ((addr->child_count -= 1) > 0) return; /* Incomplete parent */
664 address_done(addr, now);
666 /* Log the completion of all descendents only when there is no ancestor with
667 the same original address. */
669 for (aa = addr->parent; aa != NULL; aa = aa->parent)
670 if (Ustrcmp(aa->address, addr->address) == 0) break;
671 if (aa != NULL) continue;
673 deliver_msglog("%s %s: children all complete\n", now, addr->address);
674 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
680 /*************************************************
681 * Delivery logging support functions *
682 *************************************************/
684 /* The LOGGING() checks in d_log_interface() are complicated for backwards
685 compatibility. When outgoing interface logging was originally added, it was
686 conditional on just incoming_interface (which is off by default). The
687 outgoing_interface option is on by default to preserve this behaviour, but
688 you can enable incoming_interface and disable outgoing_interface to get I=
689 fields on incoming lines only.
692 s The log line buffer
693 sizep Pointer to the buffer size
694 ptrp Pointer to current index into buffer
695 addr The address to be logged
697 Returns: New value for s
701 d_log_interface(uschar *s, int *sizep, int *ptrp)
703 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
704 && sending_ip_address != NULL)
706 s = string_append(s, sizep, ptrp, 2, US" I=[", sending_ip_address);
707 if (LOGGING(outgoing_port))
708 s = string_append(s, sizep, ptrp, 2, US"]:",
709 string_sprintf("%d", sending_port));
711 s = string_cat(s, sizep, ptrp, "]", 1);
719 d_hostlog(uschar *s, int *sizep, int *ptrp, address_item *addr)
721 s = string_append(s, sizep, ptrp, 5, US" H=", addr->host_used->name,
722 US" [", addr->host_used->address, US"]");
723 if (LOGGING(outgoing_port))
724 s = string_append(s, sizep, ptrp, 2, US":", string_sprintf("%d",
725 addr->host_used->port));
726 return d_log_interface(s, sizep, ptrp);
733 d_tlslog(uschar * s, int * sizep, int * ptrp, address_item * addr)
735 if (LOGGING(tls_cipher) && addr->cipher != NULL)
736 s = string_append(s, sizep, ptrp, 2, US" X=", addr->cipher);
737 if (LOGGING(tls_certificate_verified) && addr->cipher != NULL)
738 s = string_append(s, sizep, ptrp, 2, US" CV=",
739 testflag(addr, af_cert_verified)
741 #ifdef EXPERIMENTAL_DANE
742 testflag(addr, af_dane_verified)
748 if (LOGGING(tls_peerdn) && addr->peerdn != NULL)
749 s = string_append(s, sizep, ptrp, 3, US" DN=\"",
750 string_printing(addr->peerdn), US"\"");
758 #ifdef EXPERIMENTAL_EVENT
760 event_raise(uschar * action, const uschar * event, uschar * ev_data)
766 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
768 action, deliver_host_address);
771 event_data = ev_data;
773 if (!(s = expand_string(action)) && *expand_string_message)
774 log_write(0, LOG_MAIN|LOG_PANIC,
775 "failed to expand event_action %s in %s: %s\n",
776 event, transport_name, expand_string_message);
778 event_name = event_data = NULL;
780 /* If the expansion returns anything but an empty string, flag for
781 the caller to modify his normal processing
786 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
794 msg_event_raise(const uschar * event, const address_item * addr)
796 const uschar * save_domain = deliver_domain;
797 uschar * save_local = deliver_localpart;
798 const uschar * save_host = deliver_host;
800 if (!addr->transport)
803 router_name = addr->router ? addr->router->name : NULL;
804 transport_name = addr->transport->name;
805 deliver_domain = addr->domain;
806 deliver_localpart = addr->local_part;
807 deliver_host = addr->host_used ? addr->host_used->name : NULL;
809 (void) event_raise(addr->transport->event_action, event,
810 addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
811 ? addr->message : NULL);
813 deliver_host = save_host;
814 deliver_localpart = save_local;
815 deliver_domain = save_domain;
816 router_name = transport_name = NULL;
818 #endif /*EXPERIMENTAL_EVENT*/
822 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
823 this is a nonstandard call; no two-character delivery flag is written
824 but sender-host and sender are prefixed and "msg" is inserted in the log line.
827 flags passed to log_write()
830 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
833 int size = 256; /* Used for a temporary, */
834 int ptr = 0; /* expanding buffer, for */
835 uschar *s; /* building log lines; */
836 void *reset_point; /* released afterwards. */
838 /* Log the delivery on the main log. We use an extensible string to build up
839 the log line, and reset the store afterwards. Remote deliveries should always
840 have a pointer to the host item that succeeded; local deliveries can have a
841 pointer to a single host item in their host list, for use by the transport. */
843 #ifdef EXPERIMENTAL_EVENT
844 /* presume no successful remote delivery */
845 lookup_dnssec_authenticated = NULL;
848 s = reset_point = store_get(size);
850 log_address = string_log_address(addr, LOGGING(all_parents), TRUE);
852 s = string_append(s, &size, &ptr, 3, host_and_ident(TRUE), US" ", log_address);
856 s = string_append(s, &size, &ptr, 2, US"> ", log_address);
859 if (LOGGING(sender_on_delivery) || msg)
860 s = string_append(s, &size, &ptr, 3, US" F=<",
861 #ifdef EXPERIMENTAL_INTERNATIONAL
862 testflag(addr, af_utf8_downcvt)
863 ? string_address_utf8_to_alabel(sender_address, NULL)
869 #ifdef EXPERIMENTAL_SRS
870 if(addr->prop.srs_sender)
871 s = string_append(s, &size, &ptr, 3, US" SRS=<", addr->prop.srs_sender, US">");
874 /* You might think that the return path must always be set for a successful
875 delivery; indeed, I did for some time, until this statement crashed. The case
876 when it is not set is for a delivery to /dev/null which is optimised by not
879 if (used_return_path != NULL && LOGGING(return_path_on_delivery))
880 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
883 s = string_append(s, &size, &ptr, 2, US" ", msg);
885 /* For a delivery from a system filter, there may not be a router */
886 if (addr->router != NULL)
887 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
889 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
891 if (LOGGING(delivery_size))
892 s = string_append(s, &size, &ptr, 2, US" S=",
893 string_sprintf("%d", transport_count));
897 if (addr->transport->info->local)
900 s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name);
901 s = d_log_interface(s, &size, &ptr);
902 if (addr->shadow_message != NULL)
903 s = string_cat(s, &size, &ptr, addr->shadow_message,
904 Ustrlen(addr->shadow_message));
907 /* Remote delivery */
913 s = d_hostlog(s, &size, &ptr, addr);
914 if (continue_sequence > 1)
915 s = string_cat(s, &size, &ptr, US"*", 1);
917 #ifdef EXPERIMENTAL_EVENT
918 deliver_host_address = addr->host_used->address;
919 deliver_host_port = addr->host_used->port;
920 deliver_host = addr->host_used->name;
922 /* DNS lookup status */
923 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
924 : addr->host_used->dnssec==DS_NO ? US"no"
930 s = d_tlslog(s, &size, &ptr, addr);
933 if (addr->authenticator)
935 s = string_append(s, &size, &ptr, 2, US" A=", addr->authenticator);
938 s = string_append(s, &size, &ptr, 2, US":", addr->auth_id);
939 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
940 s = string_append(s, &size, &ptr, 2, US":", addr->auth_sndr);
945 if (addr->flags & af_prdr_used)
946 s = string_append(s, &size, &ptr, 1, US" PRDR");
950 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
952 if (LOGGING(smtp_confirmation) && addr->message &&
953 (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0))
956 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
957 uschar *p = big_buffer;
958 uschar *ss = addr->message;
960 for (i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
962 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
967 s = string_append(s, &size, &ptr, 2, US" C=", big_buffer);
970 /* Time on queue and actual time taken to deliver */
972 if (LOGGING(queue_time))
973 s = string_append(s, &size, &ptr, 2, US" QT=",
974 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
976 if (LOGGING(deliver_time))
977 s = string_append(s, &size, &ptr, 2, US" DT=",
978 readconf_printtime(addr->more_errno));
980 /* string_cat() always leaves room for the terminator. Release the
981 store we used to build the line after writing it. */
984 log_write(0, flags, "%s", s);
986 #ifdef EXPERIMENTAL_EVENT
987 if (!msg) msg_event_raise(US"msg:delivery", addr);
990 store_reset(reset_point);
996 /*************************************************
997 * Actions at the end of handling an address *
998 *************************************************/
1000 /* This is a function for processing a single address when all that can be done
1001 with it has been done.
1004 addr points to the address block
1005 result the result of the delivery attempt
1006 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1007 driver_type indicates which type of driver (transport, or router) was last
1008 to process the address
1009 logchar '=' or '-' for use when logging deliveries with => or ->
1015 post_process_one(address_item *addr, int result, int logflags, int driver_type,
1018 uschar *now = tod_stamp(tod_log);
1019 uschar *driver_kind = NULL;
1020 uschar *driver_name = NULL;
1021 uschar *log_address;
1023 int size = 256; /* Used for a temporary, */
1024 int ptr = 0; /* expanding buffer, for */
1025 uschar *s; /* building log lines; */
1026 void *reset_point; /* released afterwards. */
1028 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1030 /* Set up driver kind and name for logging. Disable logging if the router or
1031 transport has disabled it. */
1033 if (driver_type == DTYPE_TRANSPORT)
1035 if (addr->transport != NULL)
1037 driver_name = addr->transport->name;
1038 driver_kind = US" transport";
1039 disable_logging = addr->transport->disable_logging;
1041 else driver_kind = US"transporting";
1043 else if (driver_type == DTYPE_ROUTER)
1045 if (addr->router != NULL)
1047 driver_name = addr->router->name;
1048 driver_kind = US" router";
1049 disable_logging = addr->router->disable_logging;
1051 else driver_kind = US"routing";
1054 /* If there's an error message set, ensure that it contains only printing
1055 characters - it should, but occasionally things slip in and this at least
1056 stops the log format from getting wrecked. We also scan the message for an LDAP
1057 expansion item that has a password setting, and flatten the password. This is a
1058 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1059 malformed, it won't ever have gone near LDAP.) */
1061 if (addr->message != NULL)
1063 const uschar * s = string_printing(addr->message);
1064 if (s != addr->message)
1065 addr->message = US s;
1066 /* deconst cast ok as string_printing known to have alloc'n'copied */
1067 if (((Ustrstr(addr->message, "failed to expand") != NULL) || (Ustrstr(addr->message, "expansion of ") != NULL)) &&
1068 (Ustrstr(addr->message, "mysql") != NULL ||
1069 Ustrstr(addr->message, "pgsql") != NULL ||
1070 #ifdef EXPERIMENTAL_REDIS
1071 Ustrstr(addr->message, "redis") != NULL ||
1073 Ustrstr(addr->message, "sqlite") != NULL ||
1074 Ustrstr(addr->message, "ldap:") != NULL ||
1075 Ustrstr(addr->message, "ldapdn:") != NULL ||
1076 Ustrstr(addr->message, "ldapm:") != NULL))
1078 addr->message = string_sprintf("Temporary internal error");
1082 /* If we used a transport that has one of the "return_output" options set, and
1083 if it did in fact generate some output, then for return_output we treat the
1084 message as failed if it was not already set that way, so that the output gets
1085 returned to the sender, provided there is a sender to send it to. For
1086 return_fail_output, do this only if the delivery failed. Otherwise we just
1087 unlink the file, and remove the name so that if the delivery failed, we don't
1088 try to send back an empty or unwanted file. The log_output options operate only
1089 on a non-empty file.
1091 In any case, we close the message file, because we cannot afford to leave a
1092 file-descriptor for one address while processing (maybe very many) others. */
1094 if (addr->return_file >= 0 && addr->return_filename != NULL)
1096 BOOL return_output = FALSE;
1097 struct stat statbuf;
1098 (void)EXIMfsync(addr->return_file);
1100 /* If there is no output, do nothing. */
1102 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1104 transport_instance *tb = addr->transport;
1106 /* Handle logging options */
1108 if (tb->log_output || (result == FAIL && tb->log_fail_output) ||
1109 (result == DEFER && tb->log_defer_output))
1112 FILE *f = Ufopen(addr->return_filename, "rb");
1114 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1115 "from %s transport: %s", addr->return_filename, tb->name,
1119 s = US Ufgets(big_buffer, big_buffer_size, f);
1122 uschar *p = big_buffer + Ustrlen(big_buffer);
1124 while (p > big_buffer && isspace(p[-1])) p--;
1126 sp = string_printing(big_buffer);
1127 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1128 addr->address, tb->name, sp);
1134 /* Handle returning options, but only if there is an address to return
1137 if (sender_address[0] != 0 || addr->prop.errors_address != NULL)
1139 if (tb->return_output)
1141 addr->transport_return = result = FAIL;
1142 if (addr->basic_errno == 0 && addr->message == NULL)
1143 addr->message = US"return message generated";
1144 return_output = TRUE;
1147 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1151 /* Get rid of the file unless it might be returned, but close it in
1156 Uunlink(addr->return_filename);
1157 addr->return_filename = NULL;
1158 addr->return_file = -1;
1161 (void)close(addr->return_file);
1164 /* The success case happens only after delivery by a transport. */
1168 addr->next = addr_succeed;
1169 addr_succeed = addr;
1171 /* Call address_done() to ensure that we don't deliver to this address again,
1172 and write appropriate things to the message log. If it is a child address, we
1173 call child_done() to scan the ancestors and mark them complete if this is the
1174 last child to complete. */
1176 address_done(addr, now);
1177 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1179 if (addr->parent == NULL)
1180 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1181 driver_name, driver_kind);
1184 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1185 addr->parent->address, driver_name, driver_kind);
1186 child_done(addr, now);
1189 /* Certificates for logging (via events) */
1191 tls_out.ourcert = addr->ourcert;
1192 addr->ourcert = NULL;
1193 tls_out.peercert = addr->peercert;
1194 addr->peercert = NULL;
1196 tls_out.cipher = addr->cipher;
1197 tls_out.peerdn = addr->peerdn;
1198 tls_out.ocsp = addr->ocsp;
1199 # ifdef EXPERIMENTAL_DANE
1200 tls_out.dane_verified = testflag(addr, af_dane_verified);
1204 delivery_log(LOG_MAIN, addr, logchar, NULL);
1207 tls_free_cert(&tls_out.ourcert);
1208 tls_free_cert(&tls_out.peercert);
1209 tls_out.cipher = NULL;
1210 tls_out.peerdn = NULL;
1211 tls_out.ocsp = OCSP_NOT_REQ;
1212 # ifdef EXPERIMENTAL_DANE
1213 tls_out.dane_verified = FALSE;
1219 /* Soft failure, or local delivery process failed; freezing may be
1222 else if (result == DEFER || result == PANIC)
1224 if (result == PANIC) logflags |= LOG_PANIC;
1226 /* This puts them on the chain in reverse order. Do not change this, because
1227 the code for handling retries assumes that the one with the retry
1228 information is last. */
1230 addr->next = addr_defer;
1233 /* The only currently implemented special action is to freeze the
1234 message. Logging of this is done later, just before the -H file is
1237 if (addr->special_action == SPECIAL_FREEZE)
1239 deliver_freeze = TRUE;
1240 deliver_frozen_at = time(NULL);
1241 update_spool = TRUE;
1244 /* If doing a 2-stage queue run, we skip writing to either the message
1245 log or the main log for SMTP defers. */
1247 if (!queue_2stage || addr->basic_errno != 0)
1251 /* For errors of the type "retry time not reached" (also remotes skipped
1252 on queue run), logging is controlled by L_retry_defer. Note that this kind
1253 of error number is negative, and all the retry ones are less than any
1256 unsigned int use_log_selector = (addr->basic_errno <= ERRNO_RETRY_BASE)?
1259 /* Build up the line that is used for both the message log and the main
1262 s = reset_point = store_get(size);
1264 /* Create the address string for logging. Must not do this earlier, because
1265 an OK result may be changed to FAIL when a pipe returns text. */
1267 log_address = string_log_address(addr, LOGGING(all_parents), result == OK);
1269 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1271 /* Either driver_name contains something and driver_kind contains
1272 " router" or " transport" (note the leading space), or driver_name is
1273 a null string and driver_kind contains "routing" without the leading
1274 space, if all routing has been deferred. When a domain has been held,
1275 so nothing has been done at all, both variables contain null strings. */
1277 if (driver_name == NULL)
1279 if (driver_kind != NULL)
1280 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1284 if (driver_kind[1] == 't' && addr->router != NULL)
1285 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1287 ss[1] = toupper(driver_kind[1]);
1288 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1291 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1292 s = string_cat(s, &size, &ptr, ss, Ustrlen(ss));
1294 if (addr->basic_errno > 0)
1295 s = string_append(s, &size, &ptr, 2, US": ",
1296 US strerror(addr->basic_errno));
1298 if (addr->host_used)
1299 s = string_append(s, &size, &ptr, 5,
1300 US" H=", addr->host_used->name,
1301 US" [", addr->host_used->address, US"]");
1303 if (addr->message != NULL)
1304 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1308 /* Log the deferment in the message log, but don't clutter it
1309 up with retry-time defers after the first delivery attempt. */
1311 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1312 deliver_msglog("%s %s\n", now, s);
1314 /* Write the main log and reset the store */
1316 log_write(use_log_selector, logflags, "== %s", s);
1317 store_reset(reset_point);
1322 /* Hard failure. If there is an address to which an error message can be sent,
1323 put this address on the failed list. If not, put it on the deferred list and
1324 freeze the mail message for human attention. The latter action can also be
1325 explicitly requested by a router or transport. */
1329 /* If this is a delivery error, or a message for which no replies are
1330 wanted, and the message's age is greater than ignore_bounce_errors_after,
1331 force the af_ignore_error flag. This will cause the address to be discarded
1332 later (with a log entry). */
1334 if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
1335 setflag(addr, af_ignore_error);
1337 /* Freeze the message if requested, or if this is a bounce message (or other
1338 message with null sender) and this address does not have its own errors
1339 address. However, don't freeze if errors are being ignored. The actual code
1340 to ignore occurs later, instead of sending a message. Logging of freezing
1341 occurs later, just before writing the -H file. */
1343 if (!testflag(addr, af_ignore_error) &&
1344 (addr->special_action == SPECIAL_FREEZE ||
1345 (sender_address[0] == 0 && addr->prop.errors_address == NULL)
1348 frozen_info = (addr->special_action == SPECIAL_FREEZE)? US"" :
1349 (sender_local && !local_error_message)?
1350 US" (message created with -f <>)" : US" (delivery error message)";
1351 deliver_freeze = TRUE;
1352 deliver_frozen_at = time(NULL);
1353 update_spool = TRUE;
1355 /* The address is put on the defer rather than the failed queue, because
1356 the message is being retained. */
1358 addr->next = addr_defer;
1362 /* Don't put the address on the nonrecipients tree yet; wait until an
1363 error message has been successfully sent. */
1367 addr->next = addr_failed;
1371 /* Build up the log line for the message and main logs */
1373 s = reset_point = store_get(size);
1375 /* Create the address string for logging. Must not do this earlier, because
1376 an OK result may be changed to FAIL when a pipe returns text. */
1378 log_address = string_log_address(addr, LOGGING(all_parents), result == OK);
1380 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1382 if (LOGGING(sender_on_delivery))
1383 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1385 /* Return path may not be set if no delivery actually happened */
1387 if (used_return_path != NULL && LOGGING(return_path_on_delivery))
1388 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1390 if (addr->router != NULL)
1391 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1392 if (addr->transport != NULL)
1393 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1395 if (addr->host_used != NULL)
1396 s = d_hostlog(s, &size, &ptr, addr);
1399 s = d_tlslog(s, &size, &ptr, addr);
1402 if (addr->basic_errno > 0)
1403 s = string_append(s, &size, &ptr, 2, US": ",
1404 US strerror(addr->basic_errno));
1406 if (addr->message != NULL)
1407 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1411 /* Do the logging. For the message log, "routing failed" for those cases,
1412 just to make it clearer. */
1414 if (driver_name == NULL)
1415 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1417 deliver_msglog("%s %s\n", now, s);
1419 log_write(0, LOG_MAIN, "** %s", s);
1421 #ifdef EXPERIMENTAL_EVENT
1422 msg_event_raise(US"msg:fail:delivery", addr);
1425 store_reset(reset_point);
1428 /* Ensure logging is turned on again in all cases */
1430 disable_logging = FALSE;
1436 /*************************************************
1437 * Address-independent error *
1438 *************************************************/
1440 /* This function is called when there's an error that is not dependent on a
1441 particular address, such as an expansion string failure. It puts the error into
1442 all the addresses in a batch, logs the incident on the main and panic logs, and
1443 clears the expansions. It is mostly called from local_deliver(), but can be
1444 called for a remote delivery via findugid().
1447 logit TRUE if (MAIN+PANIC) logging required
1448 addr the first of the chain of addresses
1450 format format string for error message, or NULL if already set in addr
1451 ... arguments for the format
1457 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1459 address_item *addr2;
1460 addr->basic_errno = code;
1466 va_start(ap, format);
1467 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1468 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1469 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1471 addr->message = string_copy(buffer);
1474 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
1476 addr2->basic_errno = code;
1477 addr2->message = addr->message;
1480 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1481 deliver_set_expansions(NULL);
1487 /*************************************************
1488 * Check a "never users" list *
1489 *************************************************/
1491 /* This function is called to check whether a uid is on one of the two "never
1495 uid the uid to be checked
1496 nusers the list to be scanned; the first item in the list is the count
1498 Returns: TRUE if the uid is on the list
1502 check_never_users(uid_t uid, uid_t *nusers)
1505 if (nusers == NULL) return FALSE;
1506 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1512 /*************************************************
1513 * Find uid and gid for a transport *
1514 *************************************************/
1516 /* This function is called for both local and remote deliveries, to find the
1517 uid/gid under which to run the delivery. The values are taken preferentially
1518 from the transport (either explicit or deliver_as_creator), then from the
1519 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1520 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1521 panic error is logged, and the function fails (which normally leads to delivery
1525 addr the address (possibly a chain)
1527 uidp pointer to uid field
1528 gidp pointer to gid field
1529 igfp pointer to the use_initgroups field
1531 Returns: FALSE if failed - error has been set in address(es)
1535 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1538 uschar *nuname = NULL;
1539 BOOL gid_set = FALSE;
1541 /* Default initgroups flag comes from the transport */
1543 *igfp = tp->initgroups;
1545 /* First see if there's a gid on the transport, either fixed or expandable.
1546 The expanding function always logs failure itself. */
1553 else if (tp->expand_gid != NULL)
1555 if (route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1556 &(addr->message))) gid_set = TRUE;
1559 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1564 /* If the transport did not set a group, see if the router did. */
1566 if (!gid_set && testflag(addr, af_gid_set))
1572 /* Pick up a uid from the transport if one is set. */
1574 if (tp->uid_set) *uidp = tp->uid;
1576 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1577 it does not provide a passwd value from which a gid can be taken. */
1579 else if (tp->expand_uid != NULL)
1582 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1583 uidp, &(addr->message)))
1585 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1588 if (!gid_set && pw != NULL)
1595 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1597 else if (tp->deliver_as_creator)
1599 *uidp = originator_uid;
1602 *gidp = originator_gid;
1607 /* Otherwise see if the address specifies the uid and if so, take it and its
1610 else if (testflag(addr, af_uid_set))
1613 *igfp = testflag(addr, af_initgroups);
1616 /* Nothing has specified the uid - default to the Exim user, and group if the
1629 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1630 defaulting to the Exim uid. In other words, if the configuration has specified
1631 a uid, it must also provide a gid. */
1635 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1636 "%s transport", tp->name);
1640 /* Check that the uid is not on the lists of banned uids that may not be used
1641 for delivery processes. */
1643 if (check_never_users(*uidp, never_users))
1644 nuname = US"never_users";
1645 else if (check_never_users(*uidp, fixed_never_users))
1646 nuname = US"fixed_never_users";
1650 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1651 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1663 /*************************************************
1664 * Check the size of a message for a transport *
1665 *************************************************/
1667 /* Checks that the message isn't too big for the selected transport.
1668 This is called only when it is known that the limit is set.
1672 addr the (first) address being delivered
1675 DEFER expansion failed or did not yield an integer
1676 FAIL message too big
1680 check_message_size(transport_instance *tp, address_item *addr)
1685 deliver_set_expansions(addr);
1686 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1687 deliver_set_expansions(NULL);
1689 if (expand_string_message != NULL)
1692 if (size_limit == -1)
1693 addr->message = string_sprintf("failed to expand message_size_limit "
1694 "in %s transport: %s", tp->name, expand_string_message);
1696 addr->message = string_sprintf("invalid message_size_limit "
1697 "in %s transport: %s", tp->name, expand_string_message);
1699 else if (size_limit > 0 && message_size > size_limit)
1703 string_sprintf("message is too big (transport limit = %d)",
1712 /*************************************************
1713 * Transport-time check for a previous delivery *
1714 *************************************************/
1716 /* Check that this base address hasn't previously been delivered to its routed
1717 transport. If it has been delivered, mark it done. The check is necessary at
1718 delivery time in order to handle homonymic addresses correctly in cases where
1719 the pattern of redirection changes between delivery attempts (so the unique
1720 fields change). Non-homonymic previous delivery is detected earlier, at routing
1721 time (which saves unnecessary routing).
1724 addr the address item
1725 testing TRUE if testing wanted only, without side effects
1727 Returns: TRUE if previously delivered by the transport
1731 previously_transported(address_item *addr, BOOL testing)
1733 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
1734 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
1736 if (tree_search(tree_nonrecipients, big_buffer) != 0)
1738 DEBUG(D_deliver|D_route|D_transport)
1739 debug_printf("%s was previously delivered (%s transport): discarded\n",
1740 addr->address, addr->transport->name);
1741 if (!testing) child_done(addr, tod_stamp(tod_log));
1750 /******************************************************
1751 * Check for a given header in a header string *
1752 ******************************************************/
1754 /* This function is used when generating quota warnings. The configuration may
1755 specify any header lines it likes in quota_warn_message. If certain of them are
1756 missing, defaults are inserted, so we need to be able to test for the presence
1760 hdr the required header name
1761 hstring the header string
1763 Returns: TRUE the header is in the string
1764 FALSE the header is not in the string
1768 contains_header(uschar *hdr, uschar *hstring)
1770 int len = Ustrlen(hdr);
1771 uschar *p = hstring;
1774 if (strncmpic(p, hdr, len) == 0)
1777 while (*p == ' ' || *p == '\t') p++;
1778 if (*p == ':') return TRUE;
1780 while (*p != 0 && *p != '\n') p++;
1781 if (*p == '\n') p++;
1789 /*************************************************
1790 * Perform a local delivery *
1791 *************************************************/
1793 /* Each local delivery is performed in a separate process which sets its
1794 uid and gid as specified. This is a safer way than simply changing and
1795 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
1796 used safely. From release 4, Exim no longer makes any use of it. Besides, not
1797 all systems have seteuid().
1799 If the uid/gid are specified in the transport_instance, they are used; the
1800 transport initialization must ensure that either both or neither are set.
1801 Otherwise, the values associated with the address are used. If neither are set,
1802 it is a configuration error.
1804 The transport or the address may specify a home directory (transport over-
1805 rides), and if they do, this is set as $home. If neither have set a working
1806 directory, this value is used for that as well. Otherwise $home is left unset
1807 and the cwd is set to "/" - a directory that should be accessible to all users.
1809 Using a separate process makes it more complicated to get error information
1810 back. We use a pipe to pass the return code and also an error code and error
1811 text string back to the parent process.
1814 addr points to an address block for this delivery; for "normal" local
1815 deliveries this is the only address to be delivered, but for
1816 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
1817 a number of addresses can be handled simultaneously, and in this
1818 case addr will point to a chain of addresses with the same
1821 shadowing TRUE if running a shadow transport; this causes output from pipes
1828 deliver_local(address_item *addr, BOOL shadowing)
1830 BOOL use_initgroups;
1833 int status, len, rc;
1836 uschar *working_directory;
1837 address_item *addr2;
1838 transport_instance *tp = addr->transport;
1840 /* Set up the return path from the errors or sender address. If the transport
1841 has its own return path setting, expand it and replace the existing value. */
1843 if(addr->prop.errors_address != NULL)
1844 return_path = addr->prop.errors_address;
1845 #ifdef EXPERIMENTAL_SRS
1846 else if(addr->prop.srs_sender != NULL)
1847 return_path = addr->prop.srs_sender;
1850 return_path = sender_address;
1852 if (tp->return_path != NULL)
1854 uschar *new_return_path = expand_string(tp->return_path);
1855 if (new_return_path == NULL)
1857 if (!expand_string_forcedfail)
1859 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
1860 US"Failed to expand return path \"%s\" in %s transport: %s",
1861 tp->return_path, tp->name, expand_string_message);
1865 else return_path = new_return_path;
1868 /* For local deliveries, one at a time, the value used for logging can just be
1869 set directly, once and for all. */
1871 used_return_path = return_path;
1873 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
1874 gets put into the address(es), and the expansions are unset, so we can just
1877 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
1879 /* See if either the transport or the address specifies a home directory. A
1880 home directory set in the address may already be expanded; a flag is set to
1881 indicate that. In other cases we must expand it. */
1883 if ((deliver_home = tp->home_dir) != NULL || /* Set in transport, or */
1884 ((deliver_home = addr->home_dir) != NULL && /* Set in address and */
1885 !testflag(addr, af_home_expanded))) /* not expanded */
1887 uschar *rawhome = deliver_home;
1888 deliver_home = NULL; /* in case it contains $home */
1889 deliver_home = expand_string(rawhome);
1890 if (deliver_home == NULL)
1892 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
1893 "to expand for %s transport: %s", rawhome, tp->name,
1894 expand_string_message);
1897 if (*deliver_home != '/')
1899 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
1900 "is not absolute for %s transport", deliver_home, tp->name);
1905 /* See if either the transport or the address specifies a current directory,
1906 and if so, expand it. If nothing is set, use the home directory, unless it is
1907 also unset in which case use "/", which is assumed to be a directory to which
1908 all users have access. It is necessary to be in a visible directory for some
1909 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
1910 2.5) require this. */
1912 working_directory = (tp->current_dir != NULL)?
1913 tp->current_dir : addr->current_dir;
1915 if (working_directory != NULL)
1917 uschar *raw = working_directory;
1918 working_directory = expand_string(raw);
1919 if (working_directory == NULL)
1921 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
1922 "failed to expand for %s transport: %s", raw, tp->name,
1923 expand_string_message);
1926 if (*working_directory != '/')
1928 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
1929 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
1933 else working_directory = (deliver_home == NULL)? US"/" : deliver_home;
1935 /* If one of the return_output flags is set on the transport, create and open a
1936 file in the message log directory for the transport to write its output onto.
1937 This is mainly used by pipe transports. The file needs to be unique to the
1938 address. This feature is not available for shadow transports. */
1940 if (!shadowing && (tp->return_output || tp->return_fail_output ||
1941 tp->log_output || tp->log_fail_output))
1944 addr->return_filename =
1945 string_sprintf("%s/msglog/%s/%s-%d-%d", spool_directory, message_subdir,
1946 message_id, getpid(), return_count++);
1947 addr->return_file = open_msglog_file(addr->return_filename, 0400, &error);
1948 if (addr->return_file < 0)
1950 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
1951 "to return message: %s", error, tp->name, strerror(errno));
1956 /* Create the pipe for inter-process communication. */
1960 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
1965 /* Now fork the process to do the real work in the subprocess, but first
1966 ensure that all cached resources are freed so that the subprocess starts with
1967 a clean slate and doesn't interfere with the parent process. */
1971 if ((pid = fork()) == 0)
1973 BOOL replicate = TRUE;
1975 /* Prevent core dumps, as we don't want them in users' home directories.
1976 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
1977 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
1978 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
1979 complain if the error is "not supported".
1981 There are two scenarios where changing the max limit has an effect. In one,
1982 the user is using a .forward and invoking a command of their choice via pipe;
1983 for these, we do need the max limit to be 0 unless the admin chooses to
1984 permit an increased limit. In the other, the command is invoked directly by
1985 the transport and is under administrator control, thus being able to raise
1986 the limit aids in debugging. So there's no general always-right answer.
1988 Thus we inhibit core-dumps completely but let individual transports, while
1989 still root, re-raise the limits back up to aid debugging. We make the
1990 default be no core-dumps -- few enough people can use core dumps in
1991 diagnosis that it's reasonable to make them something that has to be explicitly requested.
1998 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2000 # ifdef SETRLIMIT_NOT_SUPPORTED
2001 if (errno != ENOSYS && errno != ENOTSUP)
2003 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2008 /* Reset the random number generator, so different processes don't all
2009 have the same sequence. */
2013 /* If the transport has a setup entry, call this first, while still
2014 privileged. (Appendfile uses this to expand quota, for example, while
2015 able to read private files.) */
2017 if (addr->transport->setup != NULL)
2019 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2023 addr->transport_return = DEFER;
2027 addr->transport_return = PANIC;
2032 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2033 when the process becomes unprivileged, it won't be able to write to the
2034 process log. SIGHUP is ignored throughout exim, except when it is being
2037 signal(SIGINT, SIG_IGN);
2038 signal(SIGTERM, SIG_IGN);
2039 signal(SIGUSR1, SIG_IGN);
2041 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2042 half - for transports that exec things (e.g. pipe). Then set the required
2045 (void)close(pfd[pipe_read]);
2046 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2048 exim_setugid(uid, gid, use_initgroups,
2049 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2050 addr->address, addr->transport->name));
2054 address_item *batched;
2055 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2056 for (batched = addr->next; batched != NULL; batched = batched->next)
2057 debug_printf("additional batched address: %s\n", batched->address);
2060 /* Set an appropriate working directory. */
2062 if (Uchdir(working_directory) < 0)
2064 addr->transport_return = DEFER;
2065 addr->basic_errno = errno;
2066 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2069 /* If successful, call the transport */
2074 set_process_info("delivering %s to %s using %s", message_id,
2075 addr->local_part, addr->transport->name);
2077 /* Setting this global in the subprocess means we need never clear it */
2078 transport_name = addr->transport->name;
2080 /* If a transport filter has been specified, set up its argument list.
2081 Any errors will get put into the address, and FALSE yielded. */
2083 if (addr->transport->filter_command != NULL)
2085 ok = transport_set_up_command(&transport_filter_argv,
2086 addr->transport->filter_command,
2087 TRUE, PANIC, addr, US"transport filter", NULL);
2088 transport_filter_timeout = addr->transport->filter_timeout;
2090 else transport_filter_argv = NULL;
2094 debug_print_string(addr->transport->debug_string);
2095 replicate = !(addr->transport->info->code)(addr->transport, addr);
2099 /* Pass the results back down the pipe. If necessary, first replicate the
2100 status in the top address to the others in the batch. The label is the
2101 subject of a goto when a call to the transport's setup function fails. We
2102 pass the pointer to the transport back in case it got changed as a result of
2103 file_format in appendfile. */
2107 if (replicate) replicate_status(addr);
2108 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2111 int local_part_length = Ustrlen(addr2->local_part);
2115 if( (ret = write(pfd[pipe_write], (void *)&(addr2->transport_return), sizeof(int))) != sizeof(int)
2116 || (ret = write(pfd[pipe_write], (void *)&transport_count, sizeof(transport_count))) != sizeof(transport_count)
2117 || (ret = write(pfd[pipe_write], (void *)&(addr2->flags), sizeof(addr2->flags))) != sizeof(addr2->flags)
2118 || (ret = write(pfd[pipe_write], (void *)&(addr2->basic_errno), sizeof(int))) != sizeof(int)
2119 || (ret = write(pfd[pipe_write], (void *)&(addr2->more_errno), sizeof(int))) != sizeof(int)
2120 || (ret = write(pfd[pipe_write], (void *)&(addr2->special_action), sizeof(int))) != sizeof(int)
2121 || (ret = write(pfd[pipe_write], (void *)&(addr2->transport),
2122 sizeof(transport_instance *))) != sizeof(transport_instance *)
2124 /* For a file delivery, pass back the local part, in case the original
2125 was only part of the final delivery path. This gives more complete
2128 || (testflag(addr2, af_file)
2129 && ( (ret = write(pfd[pipe_write], (void *)&local_part_length, sizeof(int))) != sizeof(int)
2130 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2134 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2135 ret == -1 ? strerror(errno) : "short write");
2137 /* Now any messages */
2139 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2141 int message_length = (s == NULL)? 0 : Ustrlen(s) + 1;
2142 if( (ret = write(pfd[pipe_write], (void *)&message_length, sizeof(int))) != sizeof(int)
2143 || (message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length)
2145 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2146 ret == -1 ? strerror(errno) : "short write");
2150 /* OK, this process is now done. Free any cached resources that it opened,
2151 and close the pipe we were writing down before exiting. */
2153 (void)close(pfd[pipe_write]);
2158 /* Back in the main process: panic if the fork did not succeed. This seems
2159 better than returning an error - if forking is failing it is probably best
2160 not to try other deliveries for this message. */
2163 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2166 /* Read the pipe to get the delivery status codes and error messages. Our copy
2167 of the writing end must be closed first, as otherwise read() won't return zero
2168 on an empty pipe. We check that a status exists for each address before
2169 overwriting the address structure. If data is missing, the default DEFER status
2170 will remain. Afterwards, close the reading end. */
2172 (void)close(pfd[pipe_write]);
2174 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2176 len = read(pfd[pipe_read], (void *)&status, sizeof(int));
2182 addr2->transport_return = status;
2183 len = read(pfd[pipe_read], (void *)&transport_count,
2184 sizeof(transport_count));
2185 len = read(pfd[pipe_read], (void *)&(addr2->flags), sizeof(addr2->flags));
2186 len = read(pfd[pipe_read], (void *)&(addr2->basic_errno), sizeof(int));
2187 len = read(pfd[pipe_read], (void *)&(addr2->more_errno), sizeof(int));
2188 len = read(pfd[pipe_read], (void *)&(addr2->special_action), sizeof(int));
2189 len = read(pfd[pipe_read], (void *)&(addr2->transport),
2190 sizeof(transport_instance *));
2192 if (testflag(addr2, af_file))
2194 int local_part_length;
2195 len = read(pfd[pipe_read], (void *)&local_part_length, sizeof(int));
2196 len = read(pfd[pipe_read], (void *)big_buffer, local_part_length);
2197 big_buffer[local_part_length] = 0;
2198 addr2->local_part = string_copy(big_buffer);
2201 for (i = 0, sptr = &(addr2->message); i < 2;
2202 i++, sptr = &(addr2->user_message))
2205 len = read(pfd[pipe_read], (void *)&message_length, sizeof(int));
2206 if (message_length > 0)
2208 len = read(pfd[pipe_read], (void *)big_buffer, message_length);
2209 if (len > 0) *sptr = string_copy(big_buffer);
2216 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2217 "from delivery subprocess", addr2->unique);
2222 (void)close(pfd[pipe_read]);
2224 /* Unless shadowing, write all successful addresses immediately to the journal
2225 file, to ensure they are recorded asap. For homonymic addresses, use the base
2226 address plus the transport name. Failure to write the journal is panic-worthy,
2227 but don't stop, as it may prove possible subsequently to update the spool file
2228 in order to record the delivery. */
2232 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2234 if (addr2->transport_return != OK) continue;
2236 if (testflag(addr2, af_homonym))
2237 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2239 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2241 /* In the test harness, wait just a bit to let the subprocess finish off
2242 any debug output etc first. */
2244 if (running_in_test_harness) millisleep(300);
2246 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2247 len = Ustrlen(big_buffer);
2248 if (write(journal_fd, big_buffer, len) != len)
2249 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2250 big_buffer, strerror(errno));
2253 /* Ensure the journal file is pushed out to disk. */
2255 if (EXIMfsync(journal_fd) < 0)
2256 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2260 /* Wait for the process to finish. If it terminates with a non-zero code,
2261 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2262 status values of all the addresses as they are. Take care to handle the case
2263 when the subprocess doesn't seem to exist. This has been seen on one system
2264 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2265 happens, wait() doesn't recognize the termination of child processes. Exim now
2266 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2268 while ((rc = wait(&status)) != pid)
2270 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2272 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2273 addr->transport->driver_name);
2279 if ((status & 0xffff) != 0)
2281 int msb = (status >> 8) & 255;
2282 int lsb = status & 255;
2283 int code = (msb == 0)? (lsb & 0x7f) : msb;
2284 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2285 addr->special_action = SPECIAL_FREEZE;
2286 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2287 "status 0x%04x: %s %d",
2288 addr->transport->driver_name,
2290 (msb == 0)? "terminated by signal" : "exit code",
2294 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2296 if (addr->special_action == SPECIAL_WARN &&
2297 addr->transport->warn_message != NULL)
2300 uschar *warn_message;
2302 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2304 warn_message = expand_string(addr->transport->warn_message);
2305 if (warn_message == NULL)
2306 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2307 "message for %s transport): %s", addr->transport->warn_message,
2308 addr->transport->name, expand_string_message);
2311 pid_t pid = child_open_exim(&fd);
2314 FILE *f = fdopen(fd, "wb");
2315 if (errors_reply_to != NULL &&
2316 !contains_header(US"Reply-To", warn_message))
2317 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2318 fprintf(f, "Auto-Submitted: auto-replied\n");
2319 if (!contains_header(US"From", warn_message)) moan_write_from(f);
2320 fprintf(f, "%s", CS warn_message);
2322 /* Close and wait for child process to complete, without a timeout. */
2325 (void)child_close(pid, 0);
2329 addr->special_action = SPECIAL_NONE;
2335 /*************************************************
2336 * Do local deliveries *
2337 *************************************************/
2339 /* This function processes the list of addresses in addr_local. True local
2340 deliveries are always done one address at a time. However, local deliveries can
2341 be batched up in some cases. Typically this is when writing batched SMTP output
2342 files for use by some external transport mechanism, or when running local
2343 deliveries over LMTP.
2350 do_local_deliveries(void)
2353 open_db *dbm_file = NULL;
2354 time_t now = time(NULL);
2356 /* Loop until we have exhausted the supply of local deliveries */
2358 while (addr_local != NULL)
2360 time_t delivery_start;
2362 address_item *addr2, *addr3, *nextaddr;
2363 int logflags = LOG_MAIN;
2364 int logchar = dont_deliver? '*' : '=';
2365 transport_instance *tp;
2367 /* Pick the first undelivered address off the chain */
2369 address_item *addr = addr_local;
2370 addr_local = addr->next;
2373 DEBUG(D_deliver|D_transport)
2374 debug_printf("--------> %s <--------\n", addr->address);
2376 /* An internal disaster if there is no transport. Should not occur! */
2378 if ((tp = addr->transport) == NULL)
2380 logflags |= LOG_PANIC;
2381 disable_logging = FALSE; /* Jic */
2383 (addr->router != NULL)?
2384 string_sprintf("No transport set by %s router", addr->router->name)
2386 string_sprintf("No transport set by system filter");
2387 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2391 /* Check that this base address hasn't previously been delivered to this
2392 transport. The check is necessary at this point to handle homonymic addresses
2393 correctly in cases where the pattern of redirection changes between delivery
2394 attempts. Non-homonymic previous delivery is detected earlier, at routing
2397 if (previously_transported(addr, FALSE)) continue;
2399 /* There are weird cases where logging is disabled */
2401 disable_logging = tp->disable_logging;
2403 /* Check for batched addresses and possible amalgamation. Skip all the work
2404 if either batch_max <= 1 or there aren't any other addresses for local
2407 if (tp->batch_max > 1 && addr_local != NULL)
2409 int batch_count = 1;
2410 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2411 BOOL uses_lp = (testflag(addr, af_pfr) &&
2412 (testflag(addr, af_file) || addr->local_part[0] == '|')) ||
2413 readconf_depends((driver_instance *)tp, US"local_part");
2414 uschar *batch_id = NULL;
2415 address_item **anchor = &addr_local;
2416 address_item *last = addr;
2419 /* Expand the batch_id string for comparison with other addresses.
2420 Expansion failure suppresses batching. */
2422 if (tp->batch_id != NULL)
2424 deliver_set_expansions(addr);
2425 batch_id = expand_string(tp->batch_id);
2426 deliver_set_expansions(NULL);
2427 if (batch_id == NULL)
2429 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2430 "in %s transport (%s): %s", tp->name, addr->address,
2431 expand_string_message);
2432 batch_count = tp->batch_max;
2436 /* Until we reach the batch_max limit, pick off addresses which have the
2437 same characteristics. These are:
2440 not previously delivered (see comment about 50 lines above)
2441 same local part if the transport's configuration contains $local_part
2442 or if this is a file or pipe delivery from a redirection
2443 same domain if the transport's configuration contains $domain
2445 same additional headers
2446 same headers to be removed
2447 same uid/gid for running the transport
2448 same first host if a host list is set
2451 while ((next = *anchor) != NULL && batch_count < tp->batch_max)
2454 tp == next->transport &&
2455 !previously_transported(next, TRUE) &&
2456 (addr->flags & (af_pfr|af_file)) == (next->flags & (af_pfr|af_file)) &&
2457 (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0) &&
2458 (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0) &&
2459 same_strings(next->prop.errors_address, addr->prop.errors_address) &&
2460 same_headers(next->prop.extra_headers, addr->prop.extra_headers) &&
2461 same_strings(next->prop.remove_headers, addr->prop.remove_headers) &&
2462 same_ugid(tp, addr, next) &&
2463 ((addr->host_list == NULL && next->host_list == NULL) ||
2464 (addr->host_list != NULL && next->host_list != NULL &&
2465 Ustrcmp(addr->host_list->name, next->host_list->name) == 0));
2467 /* If the transport has a batch_id setting, batch_id will be non-NULL
2468 from the expansion outside the loop. Expand for this address and compare.
2469 Expansion failure makes this address ineligible for batching. */
2471 if (ok && batch_id != NULL)
2474 address_item *save_nextnext = next->next;
2475 next->next = NULL; /* Expansion for a single address */
2476 deliver_set_expansions(next);
2477 next->next = save_nextnext;
2478 bid = expand_string(tp->batch_id);
2479 deliver_set_expansions(NULL);
2482 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2483 "in %s transport (%s): %s", tp->name, next->address,
2484 expand_string_message);
2487 else ok = (Ustrcmp(batch_id, bid) == 0);
2490 /* Take address into batch if OK. */
2494 *anchor = next->next; /* Include the address */
2500 else anchor = &(next->next); /* Skip the address */
2504 /* We now have one or more addresses that can be delivered in a batch. Check
2505 whether the transport is prepared to accept a message of this size. If not,
2506 fail them all forthwith. If the expansion fails, or does not yield an
2507 integer, defer delivery. */
2509 if (tp->message_size_limit != NULL)
2511 int rc = check_message_size(tp, addr);
2514 replicate_status(addr);
2515 while (addr != NULL)
2518 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2521 continue; /* With next batch of addresses */
2525 /* If we are not running the queue, or if forcing, all deliveries will be
2526 attempted. Otherwise, we must respect the retry times for each address. Even
2527 when not doing this, we need to set up the retry key string, and determine
2528 whether a retry record exists, because after a successful delivery, a delete
2529 retry item must be set up. Keep the retry database open only for the duration
2530 of these checks, rather than for all local deliveries, because some local
2531 deliveries (e.g. to pipes) can take a substantial time. */
2533 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
2534 if (dbm_file == NULL)
2536 DEBUG(D_deliver|D_retry|D_hints_lookup)
2537 debug_printf("no retry data available\n");
2542 while (addr2 != NULL)
2544 BOOL ok = TRUE; /* to deliver this address */
2547 /* Set up the retry key to include the domain or not, and change its
2548 leading character from "R" to "T". Must make a copy before doing this,
2549 because the old key may be pointed to from a "delete" retry item after
2552 retry_key = string_copy(
2553 (tp->retry_use_local_part)? addr2->address_retry_key :
2554 addr2->domain_retry_key);
2557 /* Inspect the retry data. If there is no hints file, delivery happens. */
2559 if (dbm_file != NULL)
2561 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2563 /* If there is no retry record, delivery happens. If there is,
2564 remember it exists so it can be deleted after a successful delivery. */
2566 if (retry_record != NULL)
2568 setflag(addr2, af_lt_retry_exists);
2570 /* A retry record exists for this address. If queue running and not
2571 forcing, inspect its contents. If the record is too old, or if its
2572 retry time has come, or if it has passed its cutoff time, delivery
2577 debug_printf("retry record exists: age=%s ",
2578 readconf_printtime(now - retry_record->time_stamp));
2579 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2580 debug_printf(" time to retry = %s expired = %d\n",
2581 readconf_printtime(retry_record->next_try - now),
2582 retry_record->expired);
2585 if (queue_running && !deliver_force)
2587 ok = (now - retry_record->time_stamp > retry_data_expire) ||
2588 (now >= retry_record->next_try) ||
2589 retry_record->expired;
2591 /* If we haven't reached the retry time, there is one more check
2592 to do, which is for the ultimate address timeout. */
2595 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2599 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2602 /* This address is to be delivered. Leave it on the chain. */
2607 addr2 = addr2->next;
2610 /* This address is to be deferred. Take it out of the chain, and
2611 post-process it as complete. Must take it out of the chain first,
2612 because post processing puts it on another chain. */
2616 address_item *this = addr2;
2617 this->message = US"Retry time not yet reached";
2618 this->basic_errno = ERRNO_LRETRY;
2619 if (addr3 == NULL) addr2 = addr = addr2->next;
2620 else addr2 = addr3->next = addr2->next;
2621 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2625 if (dbm_file != NULL) dbfn_close(dbm_file);
2627 /* If there are no addresses left on the chain, they all deferred. Loop
2628 for the next set of addresses. */
2630 if (addr == NULL) continue;
2632 /* So, finally, we do have some addresses that can be passed to the
2633 transport. Before doing so, set up variables that are relevant to a
2636 deliver_set_expansions(addr);
2637 delivery_start = time(NULL);
2638 deliver_local(addr, FALSE);
2639 deliver_time = (int)(time(NULL) - delivery_start);
2641 /* If a shadow transport (which must perforce be another local transport), is
2642 defined, and its condition is met, we must pass the message to the shadow
2643 too, but only those addresses that succeeded. We do this by making a new
2644 chain of addresses - also to keep the original chain uncontaminated. We must
2645 use a chain rather than doing it one by one, because the shadow transport may
2648 NOTE: if the condition fails because of a lookup defer, there is nothing we
2651 if (tp->shadow != NULL &&
2652 (tp->shadow_condition == NULL ||
2653 expand_check_condition(tp->shadow_condition, tp->name, US"transport")))
2655 transport_instance *stp;
2656 address_item *shadow_addr = NULL;
2657 address_item **last = &shadow_addr;
2659 for (stp = transports; stp != NULL; stp = stp->next)
2660 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
2663 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
2666 /* Pick off the addresses that have succeeded, and make clones. Put into
2667 the shadow_message field a pointer to the shadow_message field of the real
2670 else for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2672 if (addr2->transport_return != OK) continue;
2673 addr3 = store_get(sizeof(address_item));
2676 addr3->shadow_message = (uschar *)(&(addr2->shadow_message));
2677 addr3->transport = stp;
2678 addr3->transport_return = DEFER;
2679 addr3->return_filename = NULL;
2680 addr3->return_file = -1;
2682 last = &(addr3->next);
2685 /* If we found any addresses to shadow, run the delivery, and stick any
2686 message back into the shadow_message field in the original. */
2688 if (shadow_addr != NULL)
2690 int save_count = transport_count;
2692 DEBUG(D_deliver|D_transport)
2693 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2694 deliver_local(shadow_addr, TRUE);
2696 for(; shadow_addr != NULL; shadow_addr = shadow_addr->next)
2698 int sresult = shadow_addr->transport_return;
2699 *((uschar **)(shadow_addr->shadow_message)) = (sresult == OK)?
2700 string_sprintf(" ST=%s", stp->name) :
2701 string_sprintf(" ST=%s (%s%s%s)", stp->name,
2702 (shadow_addr->basic_errno <= 0)?
2703 US"" : US strerror(shadow_addr->basic_errno),
2704 (shadow_addr->basic_errno <= 0 || shadow_addr->message == NULL)?
2706 (shadow_addr->message != NULL)? shadow_addr->message :
2707 (shadow_addr->basic_errno <= 0)? US"unknown error" : US"");
2709 DEBUG(D_deliver|D_transport)
2710 debug_printf("%s shadow transport returned %s for %s\n",
2712 (sresult == OK)? "OK" :
2713 (sresult == DEFER)? "DEFER" :
2714 (sresult == FAIL)? "FAIL" :
2715 (sresult == PANIC)? "PANIC" : "?",
2716 shadow_addr->address);
2719 DEBUG(D_deliver|D_transport)
2720 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2722 transport_count = save_count; /* Restore original transport count */
2726 /* Cancel the expansions that were set up for the delivery. */
2728 deliver_set_expansions(NULL);
2730 /* Now we can process the results of the real transport. We must take each
2731 address off the chain first, because post_process_one() puts it on another
2734 for (addr2 = addr; addr2 != NULL; addr2 = nextaddr)
2736 int result = addr2->transport_return;
2737 nextaddr = addr2->next;
2739 DEBUG(D_deliver|D_transport)
2740 debug_printf("%s transport returned %s for %s\n",
2742 (result == OK)? "OK" :
2743 (result == DEFER)? "DEFER" :
2744 (result == FAIL)? "FAIL" :
2745 (result == PANIC)? "PANIC" : "?",
2748 /* If there is a retry_record, or if delivery is deferred, build a retry
2749 item for setting a new retry time or deleting the old retry record from
2750 the database. These items are handled all together after all addresses
2751 have been handled (so the database is open just for a short time for
2754 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
2756 int flags = (result == DEFER)? 0 : rf_delete;
2757 uschar *retry_key = string_copy((tp->retry_use_local_part)?
2758 addr2->address_retry_key : addr2->domain_retry_key);
2760 retry_add_item(addr2, retry_key, flags);
2763 /* Done with this address */
2765 if (result == OK) addr2->more_errno = deliver_time;
2766 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
2768 /* If a pipe delivery generated text to be sent back, the result may be
2769 changed to FAIL, and we must copy this for subsequent addresses in the
2772 if (addr2->transport_return != result)
2774 for (addr3 = nextaddr; addr3 != NULL; addr3 = addr3->next)
2776 addr3->transport_return = addr2->transport_return;
2777 addr3->basic_errno = addr2->basic_errno;
2778 addr3->message = addr2->message;
2780 result = addr2->transport_return;
2783 /* Whether or not the result was changed to FAIL, we need to copy the
2784 return_file value from the first address into all the addresses of the
2785 batch, so they are all listed in the error message. */
2787 addr2->return_file = addr->return_file;
2789 /* Change log character for recording successful deliveries. */
2791 if (result == OK) logchar = '-';
2793 } /* Loop back for next batch of addresses */
2799 /*************************************************
2800 * Sort remote deliveries *
2801 *************************************************/
2803 /* This function is called if remote_sort_domains is set. It arranges that the
2804 chain of addresses for remote deliveries is ordered according to the strings
2805 specified. Try to make this shuffling reasonably efficient by handling
2806 sequences of addresses rather than just single ones.
2813 sort_remote_deliveries(void)
2816 address_item **aptr = &addr_remote;
2817 const uschar *listptr = remote_sort_domains;
2821 while (*aptr != NULL &&
2822 (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
2825 address_item *moved = NULL;
2826 address_item **bptr = &moved;
2828 while (*aptr != NULL)
2830 address_item **next;
2831 deliver_domain = (*aptr)->domain; /* set $domain */
2832 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
2833 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
2835 aptr = &((*aptr)->next);
2839 next = &((*aptr)->next);
2840 while (*next != NULL &&
2841 (deliver_domain = (*next)->domain, /* Set $domain */
2842 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
2843 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK)
2844 next = &((*next)->next);
2846 /* If the batch of non-matchers is at the end, add on any that were
2847 extracted further up the chain, and end this iteration. Otherwise,
2848 extract them from the chain and hang on the moved chain. */
2860 aptr = &((*aptr)->next);
2863 /* If the loop ended because the final address matched, *aptr will
2864 be NULL. Add on to the end any extracted non-matching addresses. If
2865 *aptr is not NULL, the loop ended via "break" when *next is null, that
2866 is, there was a string of non-matching addresses at the end. In this
2867 case the extracted addresses have already been added on the end. */
2869 if (*aptr == NULL) *aptr = moved;
2875 debug_printf("remote addresses after sorting:\n");
2876 for (addr = addr_remote; addr != NULL; addr = addr->next)
2877 debug_printf(" %s\n", addr->address);
2883 /*************************************************
2884 * Read from pipe for remote delivery subprocess *
2885 *************************************************/
2887 /* This function is called when the subprocess is complete, but can also be
2888 called before it is complete, in order to empty a pipe that is full (to prevent
2889 deadlock). It must therefore keep track of its progress in the parlist data
2892 We read the pipe to get the delivery status codes and a possible error message
2893 for each address, optionally preceded by unusability data for the hosts and
2894 also by optional retry data.
2896 Read in large chunks into the big buffer and then scan through, interpreting
2897 the data therein. In most cases, only a single read will be necessary. No
2898 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
2899 that we read the next chunk when there is less than 2500 bytes left in the
2900 non-final chunk, we can assume each item is complete in the buffer before
2901 handling it. Each item is written using a single write(), which is atomic for
2902 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
2903 often bigger) so even if we are reading while the subprocess is still going, we
2904 should never have only a partial item in the buffer.
2907 poffset the offset of the parlist item
2908 eop TRUE if the process has completed
2910 Returns: TRUE if the terminating 'Z' item has been read,
2911 or there has been a disaster (i.e. no more data needed);
2916 par_read_pipe(int poffset, BOOL eop)
2919 pardata *p = parlist + poffset;
2920 address_item *addrlist = p->addrlist;
2921 address_item *addr = p->addr;
2924 uschar *endptr = big_buffer;
2925 uschar *ptr = endptr;
2926 uschar *msg = p->msg;
2927 BOOL done = p->done;
2928 BOOL unfinished = TRUE;
2929 /* minimum size to read is header size including id, subid and length */
2930 int required = PIPE_HEADER_SIZE;
2932 /* Loop through all items, reading from the pipe when necessary. The pipe
2933 is set up to be non-blocking, but there are two different Unix mechanisms in
2934 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
2935 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
2936 which returns 0 for both end of file and no more data. We distinguish the
2937 two cases by taking 0 as end of file only when we know the process has
2940 Each separate item is written to the pipe in a single write(), and as they are
2941 all short items, the writes will all be atomic and we should never find
2942 ourselves in the position of having read an incomplete item. "Short" in this
2943 case can mean up to about 1K in the case when there is a long error message
2944 associated with an address. */
2946 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
2947 (int)p->pid, eop? "ended" : "not ended");
2951 retry_item *r, **rp;
2952 int remaining = endptr - ptr;
2953 uschar header[PIPE_HEADER_SIZE + 1];
2957 /* Read (first time) or top up the chars in the buffer if necessary.
2958 There will be only one read if we get all the available data (i.e. don't
2959 fill the buffer completely). */
2961 if (remaining < required && unfinished)
2964 int available = big_buffer_size - remaining;
2966 if (remaining > 0) memmove(big_buffer, ptr, remaining);
2969 endptr = big_buffer + remaining;
2970 len = read(fd, endptr, available);
2972 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
2974 /* If the result is EAGAIN and the process is not complete, just
2975 stop reading any more and process what we have already. */
2979 if (!eop && errno == EAGAIN) len = 0; else
2981 msg = string_sprintf("failed to read pipe from transport process "
2982 "%d for transport %s: %s", pid, addr->transport->driver_name,
2988 /* If the length is zero (eof or no-more-data), just process what we
2989 already have. Note that if the process is still running and we have
2990 read all the data in the pipe (but less that "available") then we
2991 won't read any more, as "unfinished" will get set FALSE. */
2995 unfinished = len == available;
2998 /* If we are at the end of the available data, exit the loop. */
2999 if (ptr >= endptr) break;
3001 /* copy and read header */
3002 memcpy(header, ptr, PIPE_HEADER_SIZE);
3003 header[PIPE_HEADER_SIZE] = '\0';
3006 required = Ustrtol(header + 2, &endc, 10) + PIPE_HEADER_SIZE; /* header + data */
3009 msg = string_sprintf("failed to read pipe from transport process "
3010 "%d for transport %s: error reading size from header", pid, addr->transport->driver_name);
3016 debug_printf("header read id:%c,subid:%c,size:%s,required:%d,remaining:%d,unfinished:%d\n",
3017 id, subid, header+2, required, remaining, unfinished);
3019 /* is there room for the dataset we want to read ? */
3020 if (required > big_buffer_size - PIPE_HEADER_SIZE)
3022 msg = string_sprintf("failed to read pipe from transport process "
3023 "%d for transport %s: big_buffer too small! required size=%d buffer size=%d", pid, addr->transport->driver_name,
3024 required, big_buffer_size - PIPE_HEADER_SIZE);
3029 /* we wrote all datasets with atomic write() calls
3030 remaining < required only happens if big_buffer was too small
3031 to get all available data from pipe. unfinished has to be true
3033 if (remaining < required)
3037 msg = string_sprintf("failed to read pipe from transport process "
3038 "%d for transport %s: required size=%d > remaining size=%d and unfinished=false",
3039 pid, addr->transport->driver_name, required, remaining);
3044 /* step behind the header */
3045 ptr += PIPE_HEADER_SIZE;
3047 /* Handle each possible type of item, assuming the complete item is
3048 available in store. */
3052 /* Host items exist only if any hosts were marked unusable. Match
3053 up by checking the IP address. */
3056 for (h = addrlist->host_list; h != NULL; h = h->next)
3058 if (h->address == NULL || Ustrcmp(h->address, ptr+2) != 0) continue;
3066 /* Retry items are sent in a preceding R item for each address. This is
3067 kept separate to keep each message short enough to guarantee it won't
3068 be split in the pipe. Hopefully, in the majority of cases, there won't in
3069 fact be any retry items at all.
3071 The complete set of retry items might include an item to delete a
3072 routing retry if there was a previous routing delay. However, routing
3073 retries are also used when a remote transport identifies an address error.
3074 In that case, there may also be an "add" item for the same key. Arrange
3075 that a "delete" item is dropped in favour of an "add" item. */
3078 if (addr == NULL) goto ADDR_MISMATCH;
3080 DEBUG(D_deliver|D_retry)
3081 debug_printf("reading retry information for %s from subprocess\n",
3084 /* Cut out any "delete" items on the list. */
3086 for (rp = &(addr->retries); (r = *rp) != NULL; rp = &(r->next))
3088 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3090 if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */
3091 *rp = r->next; /* Excise a delete item */
3092 DEBUG(D_deliver|D_retry)
3093 debug_printf(" existing delete item dropped\n");
3097 /* We want to add a delete item only if there is no non-delete item;
3098 however we still have to step ptr through the data. */
3100 if (r == NULL || (*ptr & rf_delete) == 0)
3102 r = store_get(sizeof(retry_item));
3103 r->next = addr->retries;
3106 r->key = string_copy(ptr);
3108 memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno));
3109 ptr += sizeof(r->basic_errno);
3110 memcpy(&(r->more_errno), ptr, sizeof(r->more_errno));
3111 ptr += sizeof(r->more_errno);
3112 r->message = (*ptr)? string_copy(ptr) : NULL;
3113 DEBUG(D_deliver|D_retry)
3114 debug_printf(" added %s item\n",
3115 ((r->flags & rf_delete) == 0)? "retry" : "delete");
3120 DEBUG(D_deliver|D_retry)
3121 debug_printf(" delete item not added: non-delete item exists\n");
3124 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3130 /* Put the amount of data written into the parlist block */
3133 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3134 ptr += sizeof(transport_count);
3137 /* Address items are in the order of items on the address chain. We
3138 remember the current address value in case this function is called
3139 several times to empty the pipe in stages. Information about delivery
3140 over TLS is sent in a preceding X item for each address. We don't put
3141 it in with the other info, in order to keep each message short enough to
3142 guarantee it won't be split in the pipe. */
3146 if (addr == NULL) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3150 addr->cipher = NULL;
3151 addr->peerdn = NULL;
3154 addr->cipher = string_copy(ptr);
3157 addr->peerdn = string_copy(ptr);
3162 (void) tls_import_cert(ptr, &addr->peercert);
3164 addr->peercert = NULL;
3169 (void) tls_import_cert(ptr, &addr->ourcert);
3171 addr->ourcert = NULL;
3174 # ifndef DISABLE_OCSP
3176 addr->ocsp = OCSP_NOT_REQ;
3178 addr->ocsp = *ptr - '0';
3184 #endif /*SUPPORT_TLS*/
3186 case 'C': /* client authenticator information */
3190 addr->authenticator = (*ptr)? string_copy(ptr) : NULL;
3193 addr->auth_id = (*ptr)? string_copy(ptr) : NULL;
3196 addr->auth_sndr = (*ptr)? string_copy(ptr) : NULL;
3202 #ifndef DISABLE_PRDR
3204 addr->flags |= af_prdr_used;
3209 if (addr == NULL) goto ADDR_MISMATCH;
3210 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3211 ptr += sizeof(addr->dsn_aware);
3212 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3219 msg = string_sprintf("address count mismatch for data read from pipe "
3220 "for transport process %d for transport %s", pid,
3221 addrlist->transport->driver_name);
3228 #ifdef EXPERIMENTAL_DSN_INFO
3229 case '1': /* must arrive before A0, and applies to that addr */
3230 /* Two strings: smtp_greeting and helo_response */
3231 addr->smtp_greeting = string_copy(ptr);
3233 addr->helo_response = string_copy(ptr);
3239 addr->transport_return = *ptr++;
3240 addr->special_action = *ptr++;
3241 memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno));
3242 ptr += sizeof(addr->basic_errno);
3243 memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno));
3244 ptr += sizeof(addr->more_errno);
3245 memcpy(&(addr->flags), ptr, sizeof(addr->flags));
3246 ptr += sizeof(addr->flags);
3247 addr->message = (*ptr)? string_copy(ptr) : NULL;
3249 addr->user_message = (*ptr)? string_copy(ptr) : NULL;
3252 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3256 h = store_get(sizeof(host_item));
3257 h->name = string_copy(ptr);
3259 h->address = string_copy(ptr);
3261 memcpy(&(h->port), ptr, sizeof(h->port));
3262 ptr += sizeof(h->port);
3263 h->dnssec = *ptr == '2' ? DS_YES
3264 : *ptr == '1' ? DS_NO
3267 addr->host_used = h;
3271 /* Finished with this address */
3278 /* Local interface address/port */
3280 if (*ptr) sending_ip_address = string_copy(ptr);
3282 if (*ptr) sending_port = atoi(CS ptr);
3286 /* Z marks the logical end of the data. It is followed by '0' if
3287 continue_transport was NULL at the end of transporting, otherwise '1'.
3288 We need to know when it becomes NULL during a delivery down a passed SMTP
3289 channel so that we don't try to pass anything more down it. Of course, for
3290 most normal messages it will remain NULL all the time. */
3295 continue_transport = NULL;
3296 continue_hostname = NULL;
3299 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3302 /* Anything else is a disaster. */
3305 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3306 "process %d for transport %s", ptr[-1], pid,
3307 addr->transport->driver_name);
3313 /* The done flag is inspected externally, to determine whether or not to
3314 call the function again when the process finishes. */
3318 /* If the process hadn't finished, and we haven't seen the end of the data
3319 or suffered a disaster, update the rest of the state, and return FALSE to
3320 indicate "not finished". */
3329 /* Close our end of the pipe, to prevent deadlock if the far end is still
3330 pushing stuff into it. */
3335 /* If we have finished without error, but haven't had data for every address,
3336 something is wrong. */
3338 if (msg == NULL && addr != NULL)
3339 msg = string_sprintf("insufficient address data read from pipe "
3340 "for transport process %d for transport %s", pid,
3341 addr->transport->driver_name);
3343 /* If an error message is set, something has gone wrong in getting back
3344 the delivery data. Put the message into each address and freeze it. */
3348 for (addr = addrlist; addr != NULL; addr = addr->next)
3350 addr->transport_return = DEFER;
3351 addr->special_action = SPECIAL_FREEZE;
3352 addr->message = msg;
3356 /* Return TRUE to indicate we have got all we need from this process, even
3357 if it hasn't actually finished yet. */
3364 /*************************************************
3365 * Post-process a set of remote addresses *
3366 *************************************************/
3368 /* Do what has to be done immediately after a remote delivery for each set of
3369 addresses, then re-write the spool if necessary. Note that post_process_one
3370 puts the address on an appropriate queue; hence we must fish off the next
3371 one first. This function is also called if there is a problem with setting
3372 up a subprocess to do a remote delivery in parallel. In this case, the final
3373 argument contains a message, and the action must be forced to DEFER.
3376 addr pointer to chain of address items
3377 logflags flags for logging
3378 msg NULL for normal cases; -> error message for unexpected problems
3379 fallback TRUE if processing fallback hosts
3385 remote_post_process(address_item *addr, int logflags, uschar *msg,
3390 /* If any host addresses were found to be unusable, add them to the unusable
3391 tree so that subsequent deliveries don't try them. */
3393 for (h = addr->host_list; h != NULL; h = h->next)
3395 if (h->address == NULL) continue;
3396 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3399 /* Now handle each address on the chain. The transport has placed '=' or '-'
3400 into the special_action field for each successful delivery. */
3402 while (addr != NULL)
3404 address_item *next = addr->next;
3406 /* If msg == NULL (normal processing) and the result is DEFER and we are
3407 processing the main hosts and there are fallback hosts available, put the
3408 address on the list for fallback delivery. */
3410 if (addr->transport_return == DEFER &&
3411 addr->fallback_hosts != NULL &&
3415 addr->host_list = addr->fallback_hosts;
3416 addr->next = addr_fallback;
3417 addr_fallback = addr;
3418 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3421 /* If msg is set (=> unexpected problem), set it in the address before
3422 doing the ordinary post processing. */
3428 addr->message = msg;
3429 addr->transport_return = DEFER;
3431 (void)post_process_one(addr, addr->transport_return, logflags,
3432 DTYPE_TRANSPORT, addr->special_action);
3440 /* If we have just delivered down a passed SMTP channel, and that was
3441 the last address, the channel will have been closed down. Now that
3442 we have logged that delivery, set continue_sequence to 1 so that
3443 any subsequent deliveries don't get "*" incorrectly logged. */
3445 if (continue_transport == NULL) continue_sequence = 1;
3450 /*************************************************
3451 * Wait for one remote delivery subprocess *
3452 *************************************************/
3454 /* This function is called while doing remote deliveries when either the
3455 maximum number of processes exist and we need one to complete so that another
3456 can be created, or when waiting for the last ones to complete. It must wait for
3457 the completion of one subprocess, empty the control block slot, and return a
3458 pointer to the address chain.
3461 Returns: pointer to the chain of addresses handled by the process;
3462 NULL if no subprocess found - this is an unexpected error
3465 static address_item *
3468 int poffset, status;
3469 address_item *addr, *addrlist;
3472 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3473 "to finish", message_id);
3475 /* Loop until either a subprocess completes, or there are no subprocesses in
3476 existence - in which case give an error return. We cannot proceed just by
3477 waiting for a completion, because a subprocess may have filled up its pipe, and
3478 be waiting for it to be emptied. Therefore, if no processes have finished, we
3479 wait for one of the pipes to acquire some data by calling select(), with a
3480 timeout just in case.
3482 The simple approach is just to iterate after reading data from a ready pipe.
3483 This leads to non-ideal behaviour when the subprocess has written its final Z
3484 item, closed the pipe, and is in the process of exiting (the common case). A
3485 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3486 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3489 To avoid this, if all the data that is needed has been read from a subprocess
3490 after select(), an explicit wait() for it is done. We know that all it is doing
3491 is writing to the pipe and then exiting, so the wait should not be long.
3493 The non-blocking waitpid() is to some extent just insurance; if we could
3494 reliably detect end-of-file on the pipe, we could always know when to do a
3495 blocking wait() for a completed process. However, because some systems use
3496 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3497 use code that functions without the need to recognize EOF.
3499 There's a double loop here just in case we end up with a process that is not in
3500 the list of remote delivery processes. Something has obviously gone wrong if
3501 this is the case. (For example, a process that is incorrectly left over from
3502 routing or local deliveries might be found.) The damage can be minimized by
3503 looping back and looking for another process. If there aren't any, the error
3504 return will happen. */
3506 for (;;) /* Normally we do not repeat this loop */
3508 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3511 fd_set select_pipes;
3512 int maxpipe, readycount;
3514 /* A return value of -1 can mean several things. If errno != ECHILD, it
3515 either means invalid options (which we discount), or that this process was
3516 interrupted by a signal. Just loop to try the waitpid() again.
3518 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3519 in existence. This should never happen, and is an unexpected error.
3520 However, there is a nasty complication when running under Linux. If "strace
3521 -f" is being used under Linux to trace this process and its children,
3522 subprocesses are "stolen" from their parents and become the children of the
3523 tracing process. A general wait such as the one we've just obeyed returns
3524 as if there are no children while subprocesses are running. Once a
3525 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3526 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3529 This does not happen using "truss" on Solaris, nor (I think) with other
3530 tracing facilities on other OS. It seems to be specific to Linux.
3532 What we do to get round this is to use kill() to see if any of our
3533 subprocesses are still in existence. If kill() gives an OK return, we know
3534 it must be for one of our processes - it can't be for a re-use of the pid,
3535 because if our process had finished, waitpid() would have found it. If any
3536 of our subprocesses are in existence, we proceed to use select() as if
3537 waitpid() had returned zero. I think this is safe. */
3541 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3544 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3545 "for process existence\n");
3547 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3549 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3551 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3552 "stolen by strace\n", (int)pid);
3553 break; /* With poffset set */
3557 if (poffset >= remote_max_parallel)
3559 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3560 return NULL; /* This is the error return */
3564 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3565 been handled above. A return value of zero means that there is at least one
3566 subprocess, but there are no completed subprocesses. See if any pipes are
3567 ready with any data for reading. */
3569 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3572 FD_ZERO(&select_pipes);
3573 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3575 if (parlist[poffset].pid != 0)
3577 int fd = parlist[poffset].fd;
3578 FD_SET(fd, &select_pipes);
3579 if (fd > maxpipe) maxpipe = fd;
3583 /* Stick in a 60-second timeout, just in case. */
3588 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3591 /* Scan through the pipes and read any that are ready; use the count
3592 returned by select() to stop when there are no more. Select() can return
3593 with no processes (e.g. if interrupted). This shouldn't matter.
3595 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3596 read, or there was a disaster. In either case, we are finished with this
3597 process. Do an explicit wait() for the process and break the main loop if
3600 It turns out that we have to deal with the case of an interrupted system
3601 call, which can happen on some operating systems if the signal handling is
3602 set up to do that by default. */
3605 readycount > 0 && poffset < remote_max_parallel;
3608 if ((pid = parlist[poffset].pid) != 0 &&
3609 FD_ISSET(parlist[poffset].fd, &select_pipes))
3612 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3614 for (;;) /* Loop for signals */
3616 pid_t endedpid = waitpid(pid, &status, 0);
3617 if (endedpid == pid) goto PROCESS_DONE;
3618 if (endedpid != (pid_t)(-1) || errno != EINTR)
3619 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3620 "%d (errno = %d) from waitpid() for process %d",
3621 (int)endedpid, errno, (int)pid);
3627 /* Now go back and look for a completed subprocess again. */
3630 /* A completed process was detected by the non-blocking waitpid(). Find the
3631 data block that corresponds to this subprocess. */
3633 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3634 if (pid == parlist[poffset].pid) break;
3636 /* Found the data block; this is a known remote delivery process. We don't
3637 need to repeat the outer loop. This should be what normally happens. */
3639 if (poffset < remote_max_parallel) break;
3641 /* This situation is an error, but it's probably better to carry on looking
3642 for another process than to give up (as we used to do). */
3644 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
3645 "transport process list", pid);
3646 } /* End of the "for" loop */
3648 /* Come here when all the data was completely read after a select(), and
3649 the process in pid has been wait()ed for. */
3656 debug_printf("remote delivery process %d ended\n", (int)pid);
3658 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
3662 set_process_info("delivering %s", message_id);
3664 /* Get the chain of processed addresses */
3666 addrlist = parlist[poffset].addrlist;
3668 /* If the process did not finish cleanly, record an error and freeze (except
3669 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3670 in case the delivery did actually happen. */
3672 if ((status & 0xffff) != 0)
3675 int msb = (status >> 8) & 255;
3676 int lsb = status & 255;
3677 int code = (msb == 0)? (lsb & 0x7f) : msb;
3679 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
3681 addrlist->transport->driver_name,
3683 (msb == 0)? "terminated by signal" : "exit code",
3686 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
3687 addrlist->special_action = SPECIAL_FREEZE;
3689 for (addr = addrlist; addr != NULL; addr = addr->next)
3691 addr->transport_return = DEFER;
3692 addr->message = msg;
3695 remove_journal = FALSE;
3698 /* Else complete reading the pipe to get the result of the delivery, if all
3699 the data has not yet been obtained. */
3701 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
3703 /* Put the data count and return path into globals, mark the data slot unused,
3704 decrement the count of subprocesses, and return the address chain. */
3706 transport_count = parlist[poffset].transport_count;
3707 used_return_path = parlist[poffset].return_path;
3708 parlist[poffset].pid = 0;
3715 /*************************************************
3716 * Wait for subprocesses and post-process *
3717 *************************************************/
3719 /* This function waits for subprocesses until the number that are still running
3720 is below a given threshold. For each complete subprocess, the addresses are
3721 post-processed. If we can't find a running process, there is some shambles.
3722 Better not bomb out, as that might lead to multiple copies of the message. Just
3723 log and proceed as if all done.
3726 max maximum number of subprocesses to leave running
3727 fallback TRUE if processing fallback hosts
3733 par_reduce(int max, BOOL fallback)
3735 while (parcount > max)
3737 address_item *doneaddr = par_wait();
3738 if (doneaddr == NULL)
3740 log_write(0, LOG_MAIN|LOG_PANIC,
3741 "remote delivery process count got out of step");
3744 else remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
3752 rmt_dlv_checked_write(int fd, char id, char subid, void * buf, int size)
3754 uschar writebuffer[PIPE_HEADER_SIZE + BIG_BUFFER_SIZE];
3757 /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */
3758 /* complain to log if someone tries with buffer sizes we can't handle*/
3762 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3763 "Failed writing transport result to pipe: can't handle buffers > 99999 bytes. truncating!\n");
3767 /* to keep the write() atomic we build header in writebuffer and copy buf behind */
3768 /* two write() calls would increase the complexity of reading from pipe */
3770 /* convert size to human readable string prepended by id and subid */
3771 header_length = snprintf(CS writebuffer, PIPE_HEADER_SIZE+1, "%c%c%05d", id, subid, size);
3772 if (header_length != PIPE_HEADER_SIZE)
3774 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n");
3775 writebuffer[0] = '\0';
3778 DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%d,final:%s\n",
3779 id, subid, size, writebuffer);
3781 if (buf && size > 0)
3782 memcpy(writebuffer + PIPE_HEADER_SIZE, buf, size);
3784 size += PIPE_HEADER_SIZE;
3785 int ret = write(fd, writebuffer, size);
3787 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed writing transport result to pipe: %s\n",
3788 ret == -1 ? strerror(errno) : "short write");
3791 /*************************************************
3792 * Do remote deliveries *
3793 *************************************************/
3795 /* This function is called to process the addresses in addr_remote. We must
3796 pick off the queue all addresses that have the same transport, remote
3797 destination, and errors address, and hand them to the transport in one go,
3798 subject to some configured limitations. If this is a run to continue delivering
3799 to an existing delivery channel, skip all but those addresses that can go to
3800 that channel. The skipped addresses just get deferred.
3802 If mua_wrapper is set, all addresses must be able to be sent in a single
3803 transaction. If not, this function yields FALSE.
3805 In Exim 4, remote deliveries are always done in separate processes, even
3806 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
3807 is so that the base process can retain privilege. This makes the
3808 implementation of fallback transports feasible (though not initially done.)
3810 We create up to the configured number of subprocesses, each of which passes
3811 back the delivery state via a pipe. (However, when sending down an existing
3812 connection, remote_max_parallel is forced to 1.)
3815 fallback TRUE if processing fallback hosts
3817 Returns: TRUE normally
3818 FALSE if mua_wrapper is set and the addresses cannot all be sent
3823 do_remote_deliveries(BOOL fallback)
3829 parcount = 0; /* Number of executing subprocesses */
3831 /* When sending down an existing channel, only do one delivery at a time.
3832 We use a local variable (parmax) to hold the maximum number of processes;
3833 this gets reduced from remote_max_parallel if we can't create enough pipes. */
3835 if (continue_transport != NULL) remote_max_parallel = 1;
3836 parmax = remote_max_parallel;
3838 /* If the data for keeping a list of processes hasn't yet been
3841 if (parlist == NULL)
3843 parlist = store_get(remote_max_parallel * sizeof(pardata));
3844 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3845 parlist[poffset].pid = 0;
3848 /* Now loop for each remote delivery */
3850 for (delivery_count = 0; addr_remote != NULL; delivery_count++)
3856 int address_count = 1;
3857 int address_count_max;
3859 BOOL use_initgroups;
3860 BOOL pipe_done = FALSE;
3861 transport_instance *tp;
3862 address_item **anchor = &addr_remote;
3863 address_item *addr = addr_remote;
3864 address_item *last = addr;
3867 /* Pull the first address right off the list. */
3869 addr_remote = addr->next;
3872 DEBUG(D_deliver|D_transport)
3873 debug_printf("--------> %s <--------\n", addr->address);
3875 /* If no transport has been set, there has been a big screw-up somewhere. */
3877 if ((tp = addr->transport) == NULL)
3879 disable_logging = FALSE; /* Jic */
3880 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3881 US"No transport set by router", fallback);
3885 /* Check that this base address hasn't previously been delivered to this
3886 transport. The check is necessary at this point to handle homonymic addresses
3887 correctly in cases where the pattern of redirection changes between delivery
3888 attempts. Non-homonymic previous delivery is detected earlier, at routing
3891 if (previously_transported(addr, FALSE)) continue;
3893 /* Force failure if the message is too big. */
3895 if (tp->message_size_limit != NULL)
3897 int rc = check_message_size(tp, addr);
3900 addr->transport_return = rc;
3901 remote_post_process(addr, LOG_MAIN, NULL, fallback);
3906 /* Get the flag which specifies whether the transport can handle different
3907 domains that nevertheless resolve to the same set of hosts. If it needs
3908 expanding, get variables set: $address_data, $domain_data, $localpart_data,
3909 $host, $host_address, $host_port. */
3910 if (tp->expand_multi_domain)
3911 deliver_set_expansions(addr);
3913 if (exp_bool(addr, US"transport", tp->name, D_transport,
3914 US"multi_domain", tp->multi_domain, tp->expand_multi_domain,
3915 &multi_domain) != OK)
3917 deliver_set_expansions(NULL);
3918 remote_post_process(addr, LOG_MAIN|LOG_PANIC, addr->message, fallback);
3922 /* Get the maximum it can handle in one envelope, with zero meaning
3923 unlimited, which is forced for the MUA wrapper case. */
3925 address_count_max = tp->max_addresses;
3926 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
3929 /************************************************************************/
3930 /***** This is slightly experimental code, but should be safe. *****/
3932 /* The address_count_max value is the maximum number of addresses that the
3933 transport can send in one envelope. However, the transport must be capable of
3934 dealing with any number of addresses. If the number it gets exceeds its
3935 envelope limitation, it must send multiple copies of the message. This can be
3936 done over a single connection for SMTP, so uses less resources than making
3937 multiple connections. On the other hand, if remote_max_parallel is greater
3938 than one, it is perhaps a good idea to use parallel processing to move the
3939 message faster, even if that results in multiple simultaneous connections to
3942 How can we come to some compromise between these two ideals? What we do is to
3943 limit the number of addresses passed to a single instance of a transport to
3944 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
3945 number of addresses routed to remote transports divided by
3946 remote_max_parallel. For example, if the message has 100 remote recipients,
3947 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
3948 once. But if rcpt_max is 100, we could send up to 100.
3950 Of course, not all the remotely addresses in a message are going to go to the
3951 same set of hosts (except in smarthost configurations), so this is just a
3952 heuristic way of dividing up the work.
3954 Furthermore (1), because this may not be wanted in some cases, and also to
3955 cope with really pathological cases, there is also a limit to the number of
3956 messages that are sent over one connection. This is the same limit that is
3957 used when sending several different messages over the same connection.
3958 Continue_sequence is set when in this situation, to the number sent so
3959 far, including this message.
3961 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
3962 is probably because they are using VERP, in which case they want to pass only
3963 one address at a time to the transport, in order to be able to use
3964 $local_part and $domain in constructing a new return path. We could test for
3965 the use of these variables, but as it is so likely they will be used when the
3966 maximum is 1, we don't bother. Just leave the value alone. */
3968 if (address_count_max != 1 &&
3969 address_count_max < remote_delivery_count/remote_max_parallel)
3971 int new_max = remote_delivery_count/remote_max_parallel;
3972 int message_max = tp->connection_max_messages;
3973 if (connection_max_messages >= 0) message_max = connection_max_messages;
3974 message_max -= continue_sequence - 1;
3975 if (message_max > 0 && new_max > address_count_max * message_max)
3976 new_max = address_count_max * message_max;
3977 address_count_max = new_max;
3980 /************************************************************************/
3983 /* Pick off all addresses which have the same transport, errors address,
3984 destination, and extra headers. In some cases they point to the same host
3985 list, but we also need to check for identical host lists generated from
3986 entirely different domains. The host list pointers can be NULL in the case
3987 where the hosts are defined in the transport. There is also a configured
3988 maximum limit of addresses that can be handled at once (see comments above
3989 for how it is computed).
3990 If the transport does not handle multiple domains, enforce that also,
3991 and if it might need a per-address check for this, re-evaluate it.
3994 while ((next = *anchor) != NULL && address_count < address_count_max)
3997 if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
3998 && tp == next->transport
3999 && same_hosts(next->host_list, addr->host_list)
4000 && same_strings(next->prop.errors_address, addr->prop.errors_address)
4001 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
4002 && same_ugid(tp, next, addr)
4003 && ( next->prop.remove_headers == addr->prop.remove_headers
4004 || ( next->prop.remove_headers
4005 && addr->prop.remove_headers
4006 && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0
4010 !tp->expand_multi_domain || (deliver_set_expansions(next), 1),
4012 US"transport", next->transport->name, D_transport,
4013 US"multi_domain", next->transport->multi_domain,
4014 next->transport->expand_multi_domain, &md) == OK
4019 *anchor = next->next;
4021 next->first = addr; /* remember top one (for retry processing) */
4026 else anchor = &(next->next);
4027 deliver_set_expansions(NULL);
4030 /* If we are acting as an MUA wrapper, all addresses must go in a single
4031 transaction. If not, put them back on the chain and yield FALSE. */
4033 if (mua_wrapper && addr_remote != NULL)
4035 last->next = addr_remote;
4040 /* Set up the expansion variables for this set of addresses */
4042 deliver_set_expansions(addr);
4044 /* Ensure any transport-set auth info is fresh */
4045 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
4047 /* Compute the return path, expanding a new one if required. The old one
4048 must be set first, as it might be referred to in the expansion. */
4050 if(addr->prop.errors_address != NULL)
4051 return_path = addr->prop.errors_address;
4052 #ifdef EXPERIMENTAL_SRS
4053 else if(addr->prop.srs_sender != NULL)
4054 return_path = addr->prop.srs_sender;
4057 return_path = sender_address;
4059 if (tp->return_path != NULL)
4061 uschar *new_return_path = expand_string(tp->return_path);
4062 if (new_return_path == NULL)
4064 if (!expand_string_forcedfail)
4066 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4067 string_sprintf("Failed to expand return path \"%s\": %s",
4068 tp->return_path, expand_string_message), fallback);
4072 else return_path = new_return_path;
4075 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
4076 logs and sets up error messages, so we just post-process and continue with
4077 the next address. */
4079 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
4081 remote_post_process(addr, LOG_MAIN|LOG_PANIC, NULL, fallback);
4085 /* If this transport has a setup function, call it now so that it gets
4086 run in this process and not in any subprocess. That way, the results of
4087 any setup that are retained by the transport can be reusable. One of the
4088 things the setup does is to set the fallback host lists in the addresses.
4089 That is why it is called at this point, before the continue delivery
4090 processing, because that might use the fallback hosts. */
4092 if (tp->setup != NULL)
4093 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
4095 /* If this is a run to continue delivery down an already-established
4096 channel, check that this set of addresses matches the transport and
4097 the channel. If it does not, defer the addresses. If a host list exists,
4098 we must check that the continue host is on the list. Otherwise, the
4099 host is set in the transport. */
4101 continue_more = FALSE; /* In case got set for the last lot */
4102 if (continue_transport != NULL)
4104 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
4105 if (ok && addr->host_list != NULL)
4109 for (h = addr->host_list; h != NULL; h = h->next)
4111 if (Ustrcmp(h->name, continue_hostname) == 0)
4112 { ok = TRUE; break; }
4116 /* Addresses not suitable; defer or queue for fallback hosts (which
4117 might be the continue host) and skip to next address. */
4121 DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n");
4124 if (addr->fallback_hosts != NULL && !fallback)
4128 next->host_list = next->fallback_hosts;
4129 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
4130 if (next->next == NULL) break;
4133 next->next = addr_fallback;
4134 addr_fallback = addr;
4139 while (next->next != NULL) next = next->next;
4140 next->next = addr_defer;
4147 /* Set a flag indicating whether there are further addresses that list
4148 the continued host. This tells the transport to leave the channel open,
4149 but not to pass it to another delivery process. */
4151 for (next = addr_remote; next != NULL; next = next->next)
4154 for (h = next->host_list; h != NULL; h = h->next)
4156 if (Ustrcmp(h->name, continue_hostname) == 0)
4157 { continue_more = TRUE; break; }
4162 /* The transports set up the process info themselves as they may connect
4163 to more than one remote machine. They also have to set up the filter
4164 arguments, if required, so that the host name and address are available
4167 transport_filter_argv = NULL;
4169 /* Create the pipe for inter-process communication. If pipe creation
4170 fails, it is probably because the value of remote_max_parallel is so
4171 large that too many file descriptors for pipes have been created. Arrange
4172 to wait for a process to finish, and then try again. If we still can't
4173 create a pipe when all processes have finished, break the retry loop. */
4177 if (pipe(pfd) == 0) pipe_done = TRUE;
4178 else if (parcount > 0) parmax = parcount;
4181 /* We need to make the reading end of the pipe non-blocking. There are
4182 two different options for this. Exim is cunningly (I hope!) coded so
4183 that it can use either of them, though it prefers O_NONBLOCK, which
4184 distinguishes between EOF and no-more-data. */
4187 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
4189 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
4192 /* If the maximum number of subprocesses already exist, wait for a process
4193 to finish. If we ran out of file descriptors, parmax will have been reduced
4194 from its initial value of remote_max_parallel. */
4196 par_reduce(parmax - 1, fallback);
4199 /* If we failed to create a pipe and there were no processes to wait
4200 for, we have to give up on this one. Do this outside the above loop
4201 so that we can continue the main loop. */
4205 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4206 string_sprintf("unable to create pipe: %s", strerror(errno)), fallback);
4210 /* Find a free slot in the pardata list. Must do this after the possible
4211 waiting for processes to finish, because a terminating process will free
4214 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4215 if (parlist[poffset].pid == 0) break;
4217 /* If there isn't one, there has been a horrible disaster. */
4219 if (poffset >= remote_max_parallel)
4221 (void)close(pfd[pipe_write]);
4222 (void)close(pfd[pipe_read]);
4223 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4224 US"Unexpectedly no free subprocess slot", fallback);
4228 /* Now fork a subprocess to do the remote delivery, but before doing so,
4229 ensure that any cached resourses are released so as not to interfere with
4230 what happens in the subprocess. */
4234 if ((pid = fork()) == 0)
4236 int fd = pfd[pipe_write];
4239 /* Setting this global in the subprocess means we need never clear it */
4240 transport_name = tp->name;
4242 /* There are weird circumstances in which logging is disabled */
4243 disable_logging = tp->disable_logging;
4245 /* Show pids on debug output if parallelism possible */
4247 if (parmax > 1 && (parcount > 0 || addr_remote != NULL))
4249 DEBUG(D_any|D_v) debug_selector |= D_pid;
4250 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
4253 /* Reset the random number generator, so different processes don't all
4254 have the same sequence. In the test harness we want different, but
4255 predictable settings for each delivery process, so do something explicit
4256 here rather they rely on the fixed reset in the random number function. */
4258 random_seed = running_in_test_harness? 42 + 2*delivery_count : 0;
4260 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4261 a new process that may be forked to do another delivery down the same
4264 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4266 /* Close open file descriptors for the pipes of other processes
4267 that are running in parallel. */
4269 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4270 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4272 /* This process has inherited a copy of the file descriptor
4273 for the data file, but its file pointer is shared with all the
4274 other processes running in parallel. Therefore, we have to re-open
4275 the file in order to get a new file descriptor with its own
4276 file pointer. We don't need to lock it, as the lock is held by
4277 the parent process. There doesn't seem to be any way of doing
4278 a dup-with-new-file-pointer. */
4280 (void)close(deliver_datafile);
4281 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir,
4283 deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0);
4285 if (deliver_datafile < 0)
4286 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4287 "parallel delivery: %s", spoolname, strerror(errno));
4289 /* Set the close-on-exec flag */
4291 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4294 /* Set the uid/gid of this process; bombs out on failure. */
4296 exim_setugid(uid, gid, use_initgroups,
4297 string_sprintf("remote delivery to %s with transport=%s",
4298 addr->address, tp->name));
4300 /* Close the unwanted half of this process' pipe, set the process state,
4301 and run the transport. Afterwards, transport_count will contain the number
4302 of bytes written. */
4304 (void)close(pfd[pipe_read]);
4305 set_process_info("delivering %s using %s", message_id, tp->name);
4306 debug_print_string(tp->debug_string);
4307 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4309 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4310 message_id, tp->name, addr->address, (addr->next == NULL)? "" : ", ...");
4312 /* Ensure any cached resources that we used are now released */
4316 /* Pass the result back down the pipe. This is a lot more information
4317 than is needed for a local delivery. We have to send back the error
4318 status for each address, the usability status for each host that is
4319 flagged as unusable, and all the retry items. When TLS is in use, we
4320 send also the cipher and peerdn information. Each type of information
4321 is flagged by an identifying byte, and is then in a fixed format (with
4322 strings terminated by zeros), and there is a final terminator at the
4323 end. The host information and retry information is all attached to
4324 the first address, so that gets sent at the start. */
4326 /* Host unusability information: for most success cases this will
4329 for (h = addr->host_list; h != NULL; h = h->next)
4331 if (h->address == NULL || h->status < hstatus_unusable) continue;
4332 sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address);
4333 rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3);
4336 /* The number of bytes written. This is the same for each address. Even
4337 if we sent several copies of the message down the same connection, the
4338 size of each one is the same, and it's that value we have got because
4339 transport_count gets reset before calling transport_write_message(). */
4341 memcpy(big_buffer, &transport_count, sizeof(transport_count));
4342 rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count));
4344 /* Information about what happened to each address. Four item types are
4345 used: an optional 'X' item first, for TLS information, then an optional "C"
4346 item for any client-auth info followed by 'R' items for any retry settings,
4347 and finally an 'A' item for the remaining data. */
4349 for(; addr != NULL; addr = addr->next)
4354 /* The certificate verification status goes into the flags */
4355 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4356 #ifdef EXPERIMENTAL_DANE
4357 if (tls_out.dane_verified) setflag(addr, af_dane_verified);
4360 /* Use an X item only if there's something to send */
4365 sprintf(CS ptr, "%.128s", addr->cipher);
4371 sprintf(CS ptr, "%.512s", addr->peerdn);
4375 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4380 if (!tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4384 rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer);
4389 if (!tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4393 rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer);
4395 # ifndef DISABLE_OCSP
4396 if (addr->ocsp > OCSP_NOT_REQ)
4399 sprintf(CS ptr, "%c", addr->ocsp + '0');
4401 rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer);
4404 #endif /*SUPPORT_TLS*/
4406 if (client_authenticator)
4409 sprintf(CS big_buffer, "%.64s", client_authenticator);
4411 rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer);
4413 if (client_authenticated_id)
4416 sprintf(CS big_buffer, "%.64s", client_authenticated_id);
4418 rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer);
4420 if (client_authenticated_sender)
4423 sprintf(CS big_buffer, "%.64s", client_authenticated_sender);
4425 rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer);
4428 #ifndef DISABLE_PRDR
4429 if (addr->flags & af_prdr_used)
4430 rmt_dlv_checked_write(fd, 'P', '0', NULL, 0);
4433 memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware));
4434 rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware));
4435 DEBUG(D_deliver) debug_printf("DSN write: addr->dsn_aware = %d\n", addr->dsn_aware);
4437 /* Retry information: for most success cases this will be null. */
4439 for (r = addr->retries; r != NULL; r = r->next)
4441 sprintf(CS big_buffer, "%c%.500s", r->flags, r->key);
4442 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4443 memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno));
4444 ptr += sizeof(r->basic_errno);
4445 memcpy(ptr, &(r->more_errno), sizeof(r->more_errno));
4446 ptr += sizeof(r->more_errno);
4447 if (r->message == NULL) *ptr++ = 0; else
4449 sprintf(CS ptr, "%.512s", r->message);
4452 rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer);
4455 #ifdef EXPERIMENTAL_DSN_INFO
4456 /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */
4457 if (addr->smtp_greeting)
4460 DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting);
4461 sprintf(CS ptr, "%.128s", addr->smtp_greeting);
4463 if (addr->helo_response)
4465 DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response);
4466 sprintf(CS ptr, "%.128s", addr->helo_response);
4471 rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer);
4475 /* The rest of the information goes in an 'A0' item. */
4477 sprintf(CS big_buffer, "%c%c", addr->transport_return,
4478 addr->special_action);
4479 ptr = big_buffer + 2;
4480 memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno));
4481 ptr += sizeof(addr->basic_errno);
4482 memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno));
4483 ptr += sizeof(addr->more_errno);
4484 memcpy(ptr, &(addr->flags), sizeof(addr->flags));
4485 ptr += sizeof(addr->flags);
4487 if (addr->message == NULL) *ptr++ = 0; else
4489 sprintf(CS ptr, "%.1024s", addr->message);
4493 if (addr->user_message == NULL) *ptr++ = 0; else
4495 sprintf(CS ptr, "%.1024s", addr->user_message);
4499 if (addr->host_used == NULL) *ptr++ = 0; else
4501 sprintf(CS ptr, "%.256s", addr->host_used->name);
4503 sprintf(CS ptr, "%.64s", addr->host_used->address);
4505 memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port));
4506 ptr += sizeof(addr->host_used->port);
4508 /* DNS lookup status */
4509 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4510 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4513 rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer);
4516 /* Local interface address/port */
4517 #ifdef EXPERIMENTAL_DSN_INFO
4518 if (sending_ip_address)
4520 if (LOGGING(incoming_interface) && sending_ip_address)
4523 uschar * ptr = big_buffer;
4524 sprintf(CS ptr, "%.128s", sending_ip_address);
4526 sprintf(CS ptr, "%d", sending_port);
4529 rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer);
4532 /* Add termination flag, close the pipe, and that's it. The character
4533 after 'Z' indicates whether continue_transport is now NULL or not.
4534 A change from non-NULL to NULL indicates a problem with a continuing
4537 big_buffer[0] = (continue_transport == NULL)? '0' : '1';
4538 rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1);
4543 /* Back in the mainline: close the unwanted half of the pipe. */
4545 (void)close(pfd[pipe_write]);
4547 /* Fork failed; defer with error message */
4551 (void)close(pfd[pipe_read]);
4552 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4553 string_sprintf("fork failed for remote delivery to %s: %s",
4554 addr->domain, strerror(errno)), fallback);
4558 /* Fork succeeded; increment the count, and remember relevant data for
4559 when the process finishes. */
4562 parlist[poffset].addrlist = parlist[poffset].addr = addr;
4563 parlist[poffset].pid = pid;
4564 parlist[poffset].fd = pfd[pipe_read];
4565 parlist[poffset].done = FALSE;
4566 parlist[poffset].msg = NULL;
4567 parlist[poffset].return_path = return_path;
4569 /* If the process we've just started is sending a message down an existing
4570 channel, wait for it now. This ensures that only one such process runs at
4571 once, whatever the value of remote_max parallel. Otherwise, we might try to
4572 send two or more messages simultaneously down the same channel. This could
4573 happen if there are different domains that include the same host in otherwise
4574 different host lists.
4576 Also, if the transport closes down the channel, this information gets back
4577 (continue_transport gets set to NULL) before we consider any other addresses
4580 if (continue_transport != NULL) par_reduce(0, fallback);
4582 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4583 newly created process get going before we create another process. This should
4584 ensure repeatability in the tests. We only need to wait a tad. */
4586 else if (running_in_test_harness) millisleep(500);
4589 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4590 are still running and post-process their addresses. */
4592 par_reduce(0, fallback);
4599 /*************************************************
4600 * Split an address into local part and domain *
4601 *************************************************/
4603 /* This function initializes an address for routing by splitting it up into a
4604 local part and a domain. The local part is set up twice - once in its original
4605 casing, and once in lower case, and it is dequoted. We also do the "percent
4606 hack" for configured domains. This may lead to a DEFER result if a lookup
4607 defers. When a percent-hacking takes place, we insert a copy of the original
4608 address as a new parent of this address, as if we have had a redirection.
4611 addr points to an addr_item block containing the address
4614 DEFER - could not determine if domain is %-hackable
4618 deliver_split_address(address_item *addr)
4620 uschar *address = addr->address;
4621 uschar *domain = Ustrrchr(address, '@');
4623 int len = domain - address;
4625 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
4627 /* The implication in the RFCs (though I can't say I've seen it spelled out
4628 explicitly) is that quoting should be removed from local parts at the point
4629 where they are locally interpreted. [The new draft "821" is more explicit on
4630 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4631 removing quoting backslashes and any unquoted doublequotes. */
4633 t = addr->cc_local_part = store_get(len+1);
4636 register int c = *address++;
4637 if (c == '\"') continue;
4647 /* We do the percent hack only for those domains that are listed in
4648 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4650 if (percent_hack_domains != NULL)
4653 uschar *new_address = NULL;
4654 uschar *local_part = addr->cc_local_part;
4656 deliver_domain = addr->domain; /* set $domain */
4658 while ((rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0,
4659 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
4661 (t = Ustrrchr(local_part, '%')) != NULL)
4663 new_address = string_copy(local_part);
4664 new_address[t - local_part] = '@';
4665 deliver_domain = string_copylc(t+1);
4666 local_part = string_copyn(local_part, t - local_part);
4669 if (rc == DEFER) return DEFER; /* lookup deferred */
4671 /* If hackery happened, set up new parent and alter the current address. */
4673 if (new_address != NULL)
4675 address_item *new_parent = store_get(sizeof(address_item));
4676 *new_parent = *addr;
4677 addr->parent = new_parent;
4678 addr->address = new_address;
4679 addr->unique = string_copy(new_address);
4680 addr->domain = deliver_domain;
4681 addr->cc_local_part = local_part;
4682 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
4687 /* Create the lowercased version of the final local part, and make that the
4688 default one to be used. */
4690 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
4697 /*************************************************
4698 * Get next error message text *
4699 *************************************************/
4701 /* If f is not NULL, read the next "paragraph", from a customized error message
4702 text file, terminated by a line containing ****, and expand it.
4705 f NULL or a file to read from
4706 which string indicating which string (for errors)
4708 Returns: NULL or an expanded string
4712 next_emf(FILE *f, uschar *which)
4716 uschar *para, *yield;
4719 if (f == NULL) return NULL;
4721 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4722 Ustrcmp(buffer, "****\n") == 0) return NULL;
4724 para = store_get(size);
4727 para = string_cat(para, &size, &ptr, buffer, Ustrlen(buffer));
4728 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4729 Ustrcmp(buffer, "****\n") == 0) break;
4733 yield = expand_string(para);
4734 if (yield != NULL) return yield;
4736 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
4737 "bounce_message_file or warn_message_file (%s): %s", which,
4738 expand_string_message);
4745 /*************************************************
4746 * Close down a passed transport channel *
4747 *************************************************/
4749 /* This function is called when a passed transport channel cannot be used.
4750 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
4751 so that the function call can be the argument of a "return" statement.
4754 Returns: DELIVER_NOT_ATTEMPTED
4758 continue_closedown(void)
4760 if (continue_transport != NULL)
4762 transport_instance *t;
4763 for (t = transports; t != NULL; t = t->next)
4765 if (Ustrcmp(t->name, continue_transport) == 0)
4767 if (t->info->closedown != NULL) (t->info->closedown)(t);
4772 return DELIVER_NOT_ATTEMPTED;
4778 /*************************************************
4779 * Print address information *
4780 *************************************************/
4782 /* This function is called to output an address, or information about an
4783 address, for bounce or defer messages. If the hide_child flag is set, all we
4784 output is the original ancestor address.
4787 addr points to the address
4788 f the FILE to print to
4789 si an initial string
4790 sc a continuation string for before "generated"
4793 Returns: TRUE if the address is not hidden
4797 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
4801 uschar *printed = US"";
4802 address_item *ancestor = addr;
4803 while (ancestor->parent != NULL) ancestor = ancestor->parent;
4805 fprintf(f, "%s", CS si);
4807 if (addr->parent != NULL && testflag(addr, af_hide_child))
4809 printed = US"an undisclosed address";
4812 else if (!testflag(addr, af_pfr) || addr->parent == NULL)
4813 printed = addr->address;
4817 uschar *s = addr->address;
4820 if (addr->address[0] == '>') { ss = US"mail"; s++; }
4821 else if (addr->address[0] == '|') ss = US"pipe";
4824 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
4825 printed = addr->parent->address;
4828 fprintf(f, "%s", CS string_printing(printed));
4830 if (ancestor != addr)
4832 uschar *original = (ancestor->onetime_parent == NULL)?
4833 ancestor->address : ancestor->onetime_parent;
4834 if (strcmpic(original, printed) != 0)
4835 fprintf(f, "%s(%sgenerated from %s)", sc,
4836 (ancestor != addr->parent)? "ultimately " : "",
4837 string_printing(original));
4840 if (addr->host_used)
4841 fprintf(f, "\n host %s [%s]",
4842 addr->host_used->name, addr->host_used->address);
4844 fprintf(f, "%s", CS se);
4852 /*************************************************
4853 * Print error for an address *
4854 *************************************************/
4856 /* This function is called to print the error information out of an address for
4857 a bounce or a warning message. It tries to format the message reasonably by
4858 introducing newlines. All lines are indented by 4; the initial printing
4859 position must be set before calling.
4861 This function used always to print the error. Nowadays we want to restrict it
4862 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
4863 and filter "fail". We no longer pass other information willy-nilly in bounce
4864 and warning messages. Text in user_message is always output; text in message
4865 only if the af_pass_message flag is set.
4869 f the FILE to print on
4876 print_address_error(address_item *addr, FILE *f, uschar *t)
4878 int count = Ustrlen(t);
4879 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
4881 if (!s && !(s = addr->user_message))
4884 fprintf(f, "\n %s", t);
4887 if (*s == '\\' && s[1] == 'n')
4897 if (*s++ == ':' && isspace(*s) && count > 45)
4899 fprintf(f, "\n "); /* sic (because space follows) */
4906 /***********************************************************
4907 * Print Diagnostic-Code for an address *
4908 ************************************************************/
4910 /* This function is called to print the error information out of an address for
4911 a bounce or a warning message. It tries to format the message reasonably as
4912 required by RFC 3461 by adding a space after each newline
4914 it uses the same logic as print_address_error() above. if af_pass_message is true
4915 and addr->message is set it uses the remote host answer. if not addr->user_message
4916 is used instead if available.
4920 f the FILE to print on
4926 print_dsn_diagnostic_code(const address_item *addr, FILE *f)
4928 uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL;
4930 /* af_pass_message and addr->message set ? print remote host answer */
4934 debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message);
4936 /* search first ": ". we assume to find the remote-MTA answer there */
4937 if (!(s = Ustrstr(addr->message, ": ")))
4938 return; /* not found, bail out */
4939 s += 2; /* skip ": " */
4940 fprintf(f, "Diagnostic-Code: smtp; ");
4942 /* no message available. do nothing */
4946 if (*s == '\\' && s[1] == 'n')
4948 fputs("\n ", f); /* as defined in RFC 3461 */
4958 /*************************************************
4959 * Check list of addresses for duplication *
4960 *************************************************/
4962 /* This function was introduced when the test for duplicate addresses that are
4963 not pipes, files, or autoreplies was moved from the middle of routing to when
4964 routing was complete. That was to fix obscure cases when the routing history
4965 affects the subsequent routing of identical addresses. This function is called
4966 after routing, to check that the final routed addresses are not duplicates.
4968 If we detect a duplicate, we remember what it is a duplicate of. Note that
4969 pipe, file, and autoreply de-duplication is handled during routing, so we must
4970 leave such "addresses" alone here, as otherwise they will incorrectly be
4973 Argument: address of list anchor
4978 do_duplicate_check(address_item **anchor)
4981 while ((addr = *anchor) != NULL)
4984 if (testflag(addr, af_pfr))
4986 anchor = &(addr->next);
4988 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
4990 DEBUG(D_deliver|D_route)
4991 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
4992 *anchor = addr->next;
4993 addr->dupof = tnode->data.ptr;
4994 addr->next = addr_duplicate;
4995 addr_duplicate = addr;
4999 tree_add_duplicate(addr->unique, addr);
5000 anchor = &(addr->next);
5008 /*************************************************
5009 * Deliver one message *
5010 *************************************************/
5012 /* This is the function which is called when a message is to be delivered. It
5013 is passed the id of the message. It is possible that the message no longer
5014 exists, if some other process has delivered it, and it is also possible that
5015 the message is being worked on by another process, in which case the data file
5018 If no delivery is attempted for any of the above reasons, the function returns
5019 DELIVER_NOT_ATTEMPTED.
5021 If the give_up flag is set true, do not attempt any deliveries, but instead
5022 fail all outstanding addresses and return the message to the sender (or
5025 A delivery operation has a process all to itself; we never deliver more than
5026 one message in the same process. Therefore we needn't worry too much about
5030 id the id of the message to be delivered
5031 forced TRUE if delivery was forced by an administrator; this overrides
5032 retry delays and causes a delivery to be tried regardless
5033 give_up TRUE if an administrator has requested that delivery attempts
5036 Returns: When the global variable mua_wrapper is FALSE:
5037 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
5038 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
5039 When the global variable mua_wrapper is TRUE:
5040 DELIVER_MUA_SUCCEEDED if delivery succeeded
5041 DELIVER_MUA_FAILED if delivery failed
5042 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
5046 deliver_message(uschar *id, BOOL forced, BOOL give_up)
5049 int final_yield = DELIVER_ATTEMPTED_NORMAL;
5050 time_t now = time(NULL);
5051 address_item *addr_last = NULL;
5052 uschar *filter_message = NULL;
5054 int process_recipients = RECIP_ACCEPT;
5057 extern int acl_where;
5059 uschar *info = (queue_run_pid == (pid_t)0)?
5060 string_sprintf("delivering %s", id) :
5061 string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
5063 /* If the D_process_info bit is on, set_process_info() will output debugging
5064 information. If not, we want to show this initial information if D_deliver or
5065 D_queue_run is set or in verbose mode. */
5067 set_process_info("%s", info);
5069 if ((debug_selector & D_process_info) == 0 &&
5070 (debug_selector & (D_deliver|D_queue_run|D_v)) != 0)
5071 debug_printf("%s\n", info);
5073 /* Ensure that we catch any subprocesses that are created. Although Exim
5074 sets SIG_DFL as its initial default, some routes through the code end up
5075 here with it set to SIG_IGN - cases where a non-synchronous delivery process
5076 has been forked, but no re-exec has been done. We use sigaction rather than
5077 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
5078 sure it is turned off. (There was a problem on AIX with this.) */
5082 struct sigaction act;
5083 act.sa_handler = SIG_DFL;
5084 sigemptyset(&(act.sa_mask));
5086 sigaction(SIGCHLD, &act, NULL);
5089 signal(SIGCHLD, SIG_DFL);
5092 /* Make the forcing flag available for routers and transports, set up the
5093 global message id field, and initialize the count for returned files and the
5094 message size. This use of strcpy() is OK because the length id is checked when
5095 it is obtained from a command line (the -M or -q options), and otherwise it is
5096 known to be a valid message id. */
5098 Ustrcpy(message_id, id);
5099 deliver_force = forced;
5103 /* Initialize some flags */
5105 update_spool = FALSE;
5106 remove_journal = TRUE;
5108 /* Set a known context for any ACLs we call via expansions */
5109 acl_where = ACL_WHERE_DELIVERY;
5111 /* Reset the random number generator, so that if several delivery processes are
5112 started from a queue runner that has already used random numbers (for sorting),
5113 they don't all get the same sequence. */
5117 /* Open and lock the message's data file. Exim locks on this one because the
5118 header file may get replaced as it is re-written during the delivery process.
5119 Any failures cause messages to be written to the log, except for missing files
5120 while queue running - another process probably completed delivery. As part of
5121 opening the data file, message_subdir gets set. */
5123 if (!spool_open_datafile(id))
5124 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5126 /* The value of message_size at this point has been set to the data length,
5127 plus one for the blank line that notionally precedes the data. */
5129 /* Now read the contents of the header file, which will set up the headers in
5130 store, and also the list of recipients and the tree of non-recipients and
5131 assorted flags. It updates message_size. If there is a reading or format error,
5132 give up; if the message has been around for sufficiently long, remove it. */
5134 sprintf(CS spoolname, "%s-H", id);
5135 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
5137 if (errno == ERRNO_SPOOLFORMAT)
5139 struct stat statbuf;
5140 sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
5142 if (Ustat(big_buffer, &statbuf) == 0)
5143 log_write(0, LOG_MAIN, "Format error in spool file %s: "
5144 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
5145 else log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
5148 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
5151 /* If we managed to read the envelope data, received_time contains the
5152 time the message was received. Otherwise, we can calculate it from the
5155 if (rc != spool_read_hdrerror)
5158 for (i = 0; i < 6; i++)
5159 received_time = received_time * BASE_62 + tab62[id[i] - '0'];
5162 /* If we've had this malformed message too long, sling it. */
5164 if (now - received_time > keep_malformed)
5166 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
5168 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
5170 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
5172 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
5174 log_write(0, LOG_MAIN, "Message removed because older than %s",
5175 readconf_printtime(keep_malformed));
5178 (void)close(deliver_datafile);
5179 deliver_datafile = -1;
5180 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5183 /* The spool header file has been read. Look to see if there is an existing
5184 journal file for this message. If there is, it means that a previous delivery
5185 attempt crashed (program or host) before it could update the spool header file.
5186 Read the list of delivered addresses from the journal and add them to the
5187 nonrecipients tree. Then update the spool file. We can leave the journal in
5188 existence, as it will get further successful deliveries added to it in this
5189 run, and it will be deleted if this function gets to its end successfully.
5190 Otherwise it might be needed again. */
5192 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
5193 jread = Ufopen(spoolname, "rb");
5196 while (Ufgets(big_buffer, big_buffer_size, jread) != NULL)
5198 int n = Ustrlen(big_buffer);
5199 big_buffer[n-1] = 0;
5200 tree_add_nonrecipient(big_buffer);
5201 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
5202 "journal file\n", big_buffer);
5204 (void)fclose(jread);
5205 /* Panic-dies on error */
5206 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5208 else if (errno != ENOENT)
5210 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
5211 "%s", strerror(errno));
5212 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5215 /* A null recipients list indicates some kind of disaster. */
5217 if (recipients_list == NULL)
5219 (void)close(deliver_datafile);
5220 deliver_datafile = -1;
5221 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", spoolname);
5222 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5226 /* Handle a message that is frozen. There are a number of different things that
5227 can happen, but in the default situation, unless forced, no delivery is
5232 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
5233 /* Moving to another directory removes the message from Exim's view. Other
5234 tools must be used to deal with it. Logging of this action happens in
5235 spool_move_message() and its subfunctions. */
5237 if (move_frozen_messages &&
5238 spool_move_message(id, message_subdir, US"", US"F"))
5239 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5242 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
5243 maximum time to keep messages that are frozen. Thaw if we reach it, with a
5244 flag causing all recipients to be failed. The time is the age of the
5245 message, not the time since freezing. */
5247 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
5249 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
5250 process_recipients = RECIP_FAIL_TIMEOUT;
5253 /* For bounce messages (and others with no sender), thaw if the error message
5254 ignore timer is exceeded. The message will be discarded if this delivery
5257 else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
5259 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
5262 /* If this is a bounce message, or there's no auto thaw, or we haven't
5263 reached the auto thaw time yet, and this delivery is not forced by an admin
5264 user, do not attempt delivery of this message. Note that forced is set for
5265 continuing messages down the same channel, in order to skip load checking and
5266 ignore hold domains, but we don't want unfreezing in that case. */
5270 if ((sender_address[0] == 0 ||
5272 now <= deliver_frozen_at + auto_thaw
5275 (!forced || !deliver_force_thaw || !admin_user ||
5276 continue_hostname != NULL
5279 (void)close(deliver_datafile);
5280 deliver_datafile = -1;
5281 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
5282 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5285 /* If delivery was forced (by an admin user), assume a manual thaw.
5286 Otherwise it's an auto thaw. */
5290 deliver_manual_thaw = TRUE;
5291 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
5293 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
5296 /* We get here if any of the rules for unfreezing have triggered. */
5298 deliver_freeze = FALSE;
5299 update_spool = TRUE;
5303 /* Open the message log file if we are using them. This records details of
5304 deliveries, deferments, and failures for the benefit of the mail administrator.
5305 The log is not used by exim itself to track the progress of a message; that is
5306 done by rewriting the header spool file. */
5313 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
5314 fd = open_msglog_file(spoolname, SPOOL_MODE, &error);
5318 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
5319 spoolname, strerror(errno));
5320 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5323 /* Make a C stream out of it. */
5325 message_log = fdopen(fd, "a");
5326 if (message_log == NULL)
5328 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
5329 spoolname, strerror(errno));
5330 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5335 /* If asked to give up on a message, log who did it, and set the action for all
5340 struct passwd *pw = getpwuid(real_uid);
5341 log_write(0, LOG_MAIN, "cancelled by %s", (pw != NULL)?
5342 US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5343 process_recipients = RECIP_FAIL;
5346 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5348 else if (received_count > received_headers_max)
5349 process_recipients = RECIP_FAIL_LOOP;
5351 /* Otherwise, if a system-wide, address-independent message filter is
5352 specified, run it now, except in the case when we are failing all recipients as
5353 a result of timeout_frozen_after. If the system filter yields "delivered", then
5354 ignore the true recipients of the message. Failure of the filter file is
5355 logged, and the delivery attempt fails. */
5357 else if (system_filter != NULL && process_recipients != RECIP_FAIL_TIMEOUT)
5362 redirect_block redirect;
5364 if (system_filter_uid_set)
5366 ugid.uid = system_filter_uid;
5367 ugid.gid = system_filter_gid;
5368 ugid.uid_set = ugid.gid_set = TRUE;
5372 ugid.uid_set = ugid.gid_set = FALSE;
5375 return_path = sender_address;
5376 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5377 system_filtering = TRUE;
5379 /* Any error in the filter file causes a delivery to be abandoned. */
5381 redirect.string = system_filter;
5382 redirect.isfile = TRUE;
5383 redirect.check_owner = redirect.check_group = FALSE;
5384 redirect.owners = NULL;
5385 redirect.owngroups = NULL;
5387 redirect.modemask = 0;
5389 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5392 &redirect, /* Where the data is */
5393 RDO_DEFER | /* Turn on all the enabling options */
5394 RDO_FAIL | /* Leave off all the disabling options */
5399 NULL, /* No :include: restriction (not used in filter) */
5400 NULL, /* No sieve vacation directory (not sieve!) */
5401 NULL, /* No sieve enotify mailto owner (not sieve!) */
5402 NULL, /* No sieve user address (not sieve!) */
5403 NULL, /* No sieve subaddress (not sieve!) */
5404 &ugid, /* uid/gid data */
5405 &addr_new, /* Where to hang generated addresses */
5406 &filter_message, /* Where to put error message */
5407 NULL, /* Don't skip syntax errors */
5408 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5409 US"system filter"); /* For error messages */
5411 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5413 if (rc == FF_ERROR || rc == FF_NONEXIST)
5415 (void)close(deliver_datafile);
5416 deliver_datafile = -1;
5417 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5418 string_printing(filter_message));
5419 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5422 /* Reset things. If the filter message is an empty string, which can happen
5423 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5425 system_filtering = FALSE;
5426 enable_dollar_recipients = FALSE;
5427 if (filter_message != NULL && filter_message[0] == 0) filter_message = NULL;
5429 /* Save the values of the system filter variables so that user filters
5432 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5434 /* The filter can request that delivery of the original addresses be
5439 process_recipients = RECIP_DEFER;
5440 deliver_msglog("Delivery deferred by system filter\n");
5441 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5444 /* The filter can request that a message be frozen, but this does not
5445 take place if the message has been manually thawed. In that case, we must
5446 unset "delivered", which is forced by the "freeze" command to make -bF
5449 else if (rc == FF_FREEZE && !deliver_manual_thaw)
5451 deliver_freeze = TRUE;
5452 deliver_frozen_at = time(NULL);
5453 process_recipients = RECIP_DEFER;
5454 frozen_info = string_sprintf(" by the system filter%s%s",
5455 (filter_message == NULL)? US"" : US": ",
5456 (filter_message == NULL)? US"" : filter_message);
5459 /* The filter can request that a message be failed. The error message may be
5460 quite long - it is sent back to the sender in the bounce - but we don't want
5461 to fill up the log with repetitions of it. If it starts with << then the text
5462 between << and >> is written to the log, with the rest left for the bounce
5465 else if (rc == FF_FAIL)
5467 uschar *colon = US"";
5468 uschar *logmsg = US"";
5471 process_recipients = RECIP_FAIL_FILTER;
5473 if (filter_message != NULL)
5477 if (filter_message[0] == '<' && filter_message[1] == '<' &&
5478 (logend = Ustrstr(filter_message, ">>")) != NULL)
5480 logmsg = filter_message + 2;
5481 loglen = logend - logmsg;
5482 filter_message = logend + 2;
5483 if (filter_message[0] == 0) filter_message = NULL;
5487 logmsg = filter_message;
5488 loglen = Ustrlen(filter_message);
5492 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
5496 /* Delivery can be restricted only to those recipients (if any) that the
5497 filter specified. */
5499 else if (rc == FF_DELIVERED)
5501 process_recipients = RECIP_IGNORE;
5502 if (addr_new == NULL)
5503 log_write(0, LOG_MAIN, "=> discarded (system filter)");
5505 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
5508 /* If any new addresses were created by the filter, fake up a "parent"
5509 for them. This is necessary for pipes, etc., which are expected to have
5510 parents, and it also gives some sensible logging for others. Allow
5511 pipes, files, and autoreplies, and run them as the filter uid if set,
5512 otherwise as the current uid. */
5514 if (addr_new != NULL)
5516 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
5517 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
5519 /* The text "system-filter" is tested in transport_set_up_command() and in
5520 set_up_shell_command() in the pipe transport, to enable them to permit
5521 $recipients, so don't change it here without also changing it there. */
5523 address_item *p = addr_new;
5524 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
5526 parent->domain = string_copylc(qualify_domain_recipient);
5527 parent->local_part = US"system-filter";
5529 /* As part of this loop, we arrange for addr_last to end up pointing
5530 at the final address. This is used if we go on to add addresses for the
5531 original recipients. */
5535 if (parent->child_count == SHRT_MAX)
5536 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
5537 "than %d delivery addresses", SHRT_MAX);
5538 parent->child_count++;
5541 if (testflag(p, af_pfr))
5547 setflag(p, af_uid_set |
5553 /* Find the name of the system filter's appropriate pfr transport */
5555 if (p->address[0] == '|')
5558 tpname = system_filter_pipe_transport;
5559 address_pipe = p->address;
5561 else if (p->address[0] == '>')
5564 tpname = system_filter_reply_transport;
5568 if (p->address[Ustrlen(p->address)-1] == '/')
5570 type = US"directory";
5571 tpname = system_filter_directory_transport;
5576 tpname = system_filter_file_transport;
5578 address_file = p->address;
5581 /* Now find the actual transport, first expanding the name. We have
5582 set address_file or address_pipe above. */
5586 uschar *tmp = expand_string(tpname);
5587 address_file = address_pipe = NULL;
5589 p->message = string_sprintf("failed to expand \"%s\" as a "
5590 "system filter transport name", tpname);
5595 p->message = string_sprintf("system_filter_%s_transport is unset",
5601 transport_instance *tp;
5602 for (tp = transports; tp != NULL; tp = tp->next)
5604 if (Ustrcmp(tp->name, tpname) == 0)
5611 p->message = string_sprintf("failed to find \"%s\" transport "
5612 "for system filter delivery", tpname);
5615 /* If we couldn't set up a transport, defer the delivery, putting the
5616 error on the panic log as well as the main log. */
5618 if (p->transport == NULL)
5620 address_item *badp = p;
5622 if (addr_last == NULL) addr_new = p; else addr_last->next = p;
5623 badp->local_part = badp->address; /* Needed for log line */
5624 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
5627 } /* End of pfr handling */
5629 /* Either a non-pfr delivery, or we found a transport */
5631 DEBUG(D_deliver|D_filter)
5632 debug_printf("system filter added %s\n", p->address);
5636 } /* Loop through all addr_new addresses */
5641 /* Scan the recipients list, and for every one that is not in the non-
5642 recipients tree, add an addr item to the chain of new addresses. If the pno
5643 value is non-negative, we must set the onetime parent from it. This which
5644 points to the relevant entry in the recipients list.
5646 This processing can be altered by the setting of the process_recipients
5647 variable, which is changed if recipients are to be ignored, failed, or
5648 deferred. This can happen as a result of system filter activity, or if the -Mg
5649 option is used to fail all of them.
5651 Duplicate addresses are handled later by a different tree structure; we can't
5652 just extend the non-recipients tree, because that will be re-written to the
5653 spool if the message is deferred, and in any case there are casing
5654 complications for local addresses. */
5656 if (process_recipients != RECIP_IGNORE)
5658 for (i = 0; i < recipients_count; i++)
5660 if (tree_search(tree_nonrecipients, recipients_list[i].address) == NULL)
5662 recipient_item *r = recipients_list + i;
5663 address_item *new = deliver_make_addr(r->address, FALSE);
5664 new->prop.errors_address = r->errors_to;
5665 #ifdef EXPERIMENTAL_INTERNATIONAL
5666 if ((new->prop.utf8_msg = message_smtputf8))
5668 new->prop.utf8_downcvt = message_utf8_downconvert == 1;
5669 new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1;
5670 DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n",
5671 new->prop.utf8_downcvt ? "yes"
5672 : new->prop.utf8_downcvt_maybe ? "ifneeded"
5678 new->onetime_parent = recipients_list[r->pno].address;
5680 /* If DSN support is enabled, set the dsn flags and the original receipt
5681 to be passed on to other DSN enabled MTAs */
5682 new->dsn_flags = r->dsn_flags & rf_dsnflags;
5683 new->dsn_orcpt = r->orcpt;
5684 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: %d\n",
5685 new->dsn_orcpt, new->dsn_flags);
5687 switch (process_recipients)
5689 /* RECIP_DEFER is set when a system filter freezes a message. */
5692 new->next = addr_defer;
5697 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
5700 case RECIP_FAIL_FILTER:
5702 (filter_message == NULL)? US"delivery cancelled" : filter_message;
5703 setflag(new, af_pass_message);
5704 goto RECIP_QUEUE_FAILED; /* below */
5707 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
5708 than the value in timeout_frozen_after. Treat non-bounce messages
5709 similarly to -Mg; for bounce messages we just want to discard, so
5710 don't put the address on the failed list. The timeout has already
5713 case RECIP_FAIL_TIMEOUT:
5714 new->message = US"delivery cancelled; message timed out";
5715 goto RECIP_QUEUE_FAILED; /* below */
5718 /* RECIP_FAIL is set when -Mg has been used. */
5721 new->message = US"delivery cancelled by administrator";
5724 /* Common code for the failure cases above. If this is not a bounce
5725 message, put the address on the failed list so that it is used to
5726 create a bounce. Otherwise do nothing - this just discards the address.
5727 The incident has already been logged. */
5730 if (sender_address[0] != 0)
5732 new->next = addr_failed;
5738 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
5739 in the message. Process each address as a routing failure; if this
5740 is a bounce message, it will get frozen. */
5742 case RECIP_FAIL_LOOP:
5743 new->message = US"Too many \"Received\" headers - suspected mail loop";
5744 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5748 /* Value should be RECIP_ACCEPT; take this as the safe default. */
5751 if (addr_new == NULL) addr_new = new; else addr_last->next = new;
5756 #ifdef EXPERIMENTAL_EVENT
5757 if (process_recipients != RECIP_ACCEPT)
5759 uschar * save_local = deliver_localpart;
5760 const uschar * save_domain = deliver_domain;
5762 deliver_localpart = expand_string(
5763 string_sprintf("${local_part:%s}", new->address));
5764 deliver_domain = expand_string(
5765 string_sprintf("${domain:%s}", new->address));
5767 (void) event_raise(event_action,
5768 US"msg:fail:internal", new->message);
5770 deliver_localpart = save_local;
5771 deliver_domain = save_domain;
5780 address_item *p = addr_new;
5781 debug_printf("Delivery address list:\n");
5784 debug_printf(" %s %s\n", p->address, (p->onetime_parent == NULL)? US"" :
5790 /* Set up the buffers used for copying over the file when delivering. */
5792 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
5793 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
5797 /* Until there are no more new addresses, handle each one as follows:
5799 . If this is a generated address (indicated by the presence of a parent
5800 pointer) then check to see whether it is a pipe, file, or autoreply, and
5801 if so, handle it directly here. The router that produced the address will
5802 have set the allow flags into the address, and also set the uid/gid required.
5803 Having the routers generate new addresses and then checking them here at
5804 the outer level is tidier than making each router do the checking, and
5805 means that routers don't need access to the failed address queue.
5807 . Break up the address into local part and domain, and make lowercased
5808 versions of these strings. We also make unquoted versions of the local part.
5810 . Handle the percent hack for those domains for which it is valid.
5812 . For child addresses, determine if any of the parents have the same address.
5813 If so, generate a different string for previous delivery checking. Without
5814 this code, if the address spqr generates spqr via a forward or alias file,
5815 delivery of the generated spqr stops further attempts at the top level spqr,
5816 which is not what is wanted - it may have generated other addresses.
5818 . Check on the retry database to see if routing was previously deferred, but
5819 only if in a queue run. Addresses that are to be routed are put on the
5820 addr_route chain. Addresses that are to be deferred are put on the
5821 addr_defer chain. We do all the checking first, so as not to keep the
5822 retry database open any longer than necessary.
5824 . Now we run the addresses through the routers. A router may put the address
5825 on either the addr_local or the addr_remote chain for local or remote
5826 delivery, respectively, or put it on the addr_failed chain if it is
5827 undeliveable, or it may generate child addresses and put them on the
5828 addr_new chain, or it may defer an address. All the chain anchors are
5829 passed as arguments so that the routers can be called for verification
5832 . If new addresses have been generated by the routers, da capo.
5835 header_rewritten = FALSE; /* No headers rewritten yet */
5836 while (addr_new != NULL) /* Loop until all addresses dealt with */
5838 address_item *addr, *parent;
5839 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
5841 /* Failure to open the retry database is treated the same as if it does
5842 not exist. In both cases, dbm_file is NULL. */
5844 if (dbm_file == NULL)
5846 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
5847 debug_printf("no retry data available\n");
5850 /* Scan the current batch of new addresses, to handle pipes, files and
5851 autoreplies, and determine which others are ready for routing. */
5853 while (addr_new != NULL)
5858 dbdata_retry *domain_retry_record;
5859 dbdata_retry *address_retry_record;
5862 addr_new = addr->next;
5864 DEBUG(D_deliver|D_retry|D_route)
5866 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5867 debug_printf("Considering: %s\n", addr->address);
5870 /* Handle generated address that is a pipe or a file or an autoreply. */
5872 if (testflag(addr, af_pfr))
5874 /* If an autoreply in a filter could not generate a syntactically valid
5875 address, give up forthwith. Set af_ignore_error so that we don't try to
5876 generate a bounce. */
5878 if (testflag(addr, af_bad_reply))
5880 addr->basic_errno = ERRNO_BADADDRESS2;
5881 addr->local_part = addr->address;
5883 US"filter autoreply generated syntactically invalid recipient";
5884 setflag(addr, af_ignore_error);
5885 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5886 continue; /* with the next new address */
5889 /* If two different users specify delivery to the same pipe or file or
5890 autoreply, there should be two different deliveries, so build a unique
5891 string that incorporates the original address, and use this for
5892 duplicate testing and recording delivery, and also for retrying. */
5895 string_sprintf("%s:%s", addr->address, addr->parent->unique +
5896 (testflag(addr->parent, af_homonym)? 3:0));
5898 addr->address_retry_key = addr->domain_retry_key =
5899 string_sprintf("T:%s", addr->unique);
5901 /* If a filter file specifies two deliveries to the same pipe or file,
5902 we want to de-duplicate, but this is probably not wanted for two mail
5903 commands to the same address, where probably both should be delivered.
5904 So, we have to invent a different unique string in that case. Just
5905 keep piling '>' characters on the front. */
5907 if (addr->address[0] == '>')
5909 while (tree_search(tree_duplicates, addr->unique) != NULL)
5910 addr->unique = string_sprintf(">%s", addr->unique);
5913 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
5915 DEBUG(D_deliver|D_route)
5916 debug_printf("%s is a duplicate address: discarded\n", addr->address);
5917 addr->dupof = tnode->data.ptr;
5918 addr->next = addr_duplicate;
5919 addr_duplicate = addr;
5923 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5925 /* Check for previous delivery */
5927 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5929 DEBUG(D_deliver|D_route)
5930 debug_printf("%s was previously delivered: discarded\n", addr->address);
5931 child_done(addr, tod_stamp(tod_log));
5935 /* Save for checking future duplicates */
5937 tree_add_duplicate(addr->unique, addr);
5939 /* Set local part and domain */
5941 addr->local_part = addr->address;
5942 addr->domain = addr->parent->domain;
5944 /* Ensure that the delivery is permitted. */
5946 if (testflag(addr, af_file))
5948 if (!testflag(addr, af_allow_file))
5950 addr->basic_errno = ERRNO_FORBIDFILE;
5951 addr->message = US"delivery to file forbidden";
5952 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5953 continue; /* with the next new address */
5956 else if (addr->address[0] == '|')
5958 if (!testflag(addr, af_allow_pipe))
5960 addr->basic_errno = ERRNO_FORBIDPIPE;
5961 addr->message = US"delivery to pipe forbidden";
5962 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5963 continue; /* with the next new address */
5966 else if (!testflag(addr, af_allow_reply))
5968 addr->basic_errno = ERRNO_FORBIDREPLY;
5969 addr->message = US"autoreply forbidden";
5970 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5971 continue; /* with the next new address */
5974 /* If the errno field is already set to BADTRANSPORT, it indicates
5975 failure to expand a transport string, or find the associated transport,
5976 or an unset transport when one is required. Leave this test till now so
5977 that the forbid errors are given in preference. */
5979 if (addr->basic_errno == ERRNO_BADTRANSPORT)
5981 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5985 /* Treat /dev/null as a special case and abandon the delivery. This
5986 avoids having to specify a uid on the transport just for this case.
5987 Arrange for the transport name to be logged as "**bypassed**". */
5989 if (Ustrcmp(addr->address, "/dev/null") == 0)
5991 uschar *save = addr->transport->name;
5992 addr->transport->name = US"**bypassed**";
5993 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
5994 addr->transport->name = save;
5995 continue; /* with the next new address */
5998 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
6001 DEBUG(D_deliver|D_route)
6002 debug_printf("queued for %s transport\n", addr->transport->name);
6003 addr->next = addr_local;
6005 continue; /* with the next new address */
6008 /* Handle normal addresses. First, split up into local part and domain,
6009 handling the %-hack if necessary. There is the possibility of a defer from
6010 a lookup in percent_hack_domains. */
6012 if ((rc = deliver_split_address(addr)) == DEFER)
6014 addr->message = US"cannot check percent_hack_domains";
6015 addr->basic_errno = ERRNO_LISTDEFER;
6016 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6020 /* Check to see if the domain is held. If so, proceed only if the
6021 delivery was forced by hand. */
6023 deliver_domain = addr->domain; /* set $domain */
6024 if (!forced && hold_domains != NULL &&
6025 (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0,
6026 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
6031 addr->message = US"hold_domains lookup deferred";
6032 addr->basic_errno = ERRNO_LISTDEFER;
6036 addr->message = US"domain is held";
6037 addr->basic_errno = ERRNO_HELD;
6039 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6043 /* Now we can check for duplicates and previously delivered addresses. In
6044 order to do this, we have to generate a "unique" value for each address,
6045 because there may be identical actual addresses in a line of descendents.
6046 The "unique" field is initialized to the same value as the "address" field,
6047 but gets changed here to cope with identically-named descendents. */
6049 for (parent = addr->parent; parent != NULL; parent = parent->parent)
6050 if (strcmpic(addr->address, parent->address) == 0) break;
6052 /* If there's an ancestor with the same name, set the homonym flag. This
6053 influences how deliveries are recorded. Then add a prefix on the front of
6054 the unique address. We use \n\ where n starts at 0 and increases each time.
6055 It is unlikely to pass 9, but if it does, it may look odd but will still
6056 work. This means that siblings or cousins with the same names are treated
6057 as duplicates, which is what we want. */
6061 setflag(addr, af_homonym);
6062 if (parent->unique[0] != '\\')
6063 addr->unique = string_sprintf("\\0\\%s", addr->address);
6065 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
6069 /* Ensure that the domain in the unique field is lower cased, because
6070 domains are always handled caselessly. */
6072 p = Ustrrchr(addr->unique, '@');
6073 while (*p != 0) { *p = tolower(*p); p++; }
6075 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6077 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
6079 DEBUG(D_deliver|D_route)
6080 debug_printf("%s was previously delivered: discarded\n", addr->unique);
6081 child_done(addr, tod_stamp(tod_log));
6085 /* Get the routing retry status, saving the two retry keys (with and
6086 without the local part) for subsequent use. If there is no retry record for
6087 the standard address routing retry key, we look for the same key with the
6088 sender attached, because this form is used by the smtp transport after a
6089 4xx response to RCPT when address_retry_include_sender is true. */
6091 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
6092 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
6095 if (dbm_file == NULL)
6096 domain_retry_record = address_retry_record = NULL;
6099 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
6100 if (domain_retry_record != NULL &&
6101 now - domain_retry_record->time_stamp > retry_data_expire)
6102 domain_retry_record = NULL; /* Ignore if too old */
6104 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
6105 if (address_retry_record != NULL &&
6106 now - address_retry_record->time_stamp > retry_data_expire)
6107 address_retry_record = NULL; /* Ignore if too old */
6109 if (address_retry_record == NULL)
6111 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6113 address_retry_record = dbfn_read(dbm_file, altkey);
6114 if (address_retry_record != NULL &&
6115 now - address_retry_record->time_stamp > retry_data_expire)
6116 address_retry_record = NULL; /* Ignore if too old */
6120 DEBUG(D_deliver|D_retry)
6122 if (domain_retry_record == NULL)
6123 debug_printf("no domain retry record\n");
6124 if (address_retry_record == NULL)
6125 debug_printf("no address retry record\n");
6128 /* If we are sending a message down an existing SMTP connection, we must
6129 assume that the message which created the connection managed to route
6130 an address to that connection. We do not want to run the risk of taking
6131 a long time over routing here, because if we do, the server at the other
6132 end of the connection may time it out. This is especially true for messages
6133 with lots of addresses. For this kind of delivery, queue_running is not
6134 set, so we would normally route all addresses. We take a pragmatic approach
6135 and defer routing any addresses that have any kind of domain retry record.
6136 That is, we don't even look at their retry times. It doesn't matter if this
6137 doesn't work occasionally. This is all just an optimization, after all.
6139 The reason for not doing the same for address retries is that they normally
6140 arise from 4xx responses, not DNS timeouts. */
6142 if (continue_hostname != NULL && domain_retry_record != NULL)
6144 addr->message = US"reusing SMTP connection skips previous routing defer";
6145 addr->basic_errno = ERRNO_RRETRY;
6146 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6149 /* If we are in a queue run, defer routing unless there is no retry data or
6150 we've passed the next retry time, or this message is forced. In other
6151 words, ignore retry data when not in a queue run.
6153 However, if the domain retry time has expired, always allow the routing
6154 attempt. If it fails again, the address will be failed. This ensures that
6155 each address is routed at least once, even after long-term routing
6158 If there is an address retry, check that too; just wait for the next
6159 retry time. This helps with the case when the temporary error on the
6160 address was really message-specific rather than address specific, since
6161 it allows other messages through.
6163 We also wait for the next retry time if this is a message sent down an
6164 existing SMTP connection (even though that will be forced). Otherwise there
6165 will be far too many attempts for an address that gets a 4xx error. In
6166 fact, after such an error, we should not get here because, the host should
6167 not be remembered as one this message needs. However, there was a bug that
6168 used to cause this to happen, so it is best to be on the safe side.
6170 Even if we haven't reached the retry time in the hints, there is one more
6171 check to do, which is for the ultimate address timeout. We only do this
6172 check if there is an address retry record and there is not a domain retry
6173 record; this implies that previous attempts to handle the address had the
6174 retry_use_local_parts option turned on. We use this as an approximation
6175 for the destination being like a local delivery, for example delivery over
6176 LMTP to an IMAP message store. In this situation users are liable to bump
6177 into their quota and thereby have intermittently successful deliveries,
6178 which keep the retry record fresh, which can lead to us perpetually
6179 deferring messages. */
6181 else if (((queue_running && !deliver_force) || continue_hostname != NULL)
6183 ((domain_retry_record != NULL &&
6184 now < domain_retry_record->next_try &&
6185 !domain_retry_record->expired)
6187 (address_retry_record != NULL &&
6188 now < address_retry_record->next_try))
6190 (domain_retry_record != NULL ||
6191 address_retry_record == NULL ||
6192 !retry_ultimate_address_timeout(addr->address_retry_key,
6193 addr->domain, address_retry_record, now)))
6195 addr->message = US"retry time not reached";
6196 addr->basic_errno = ERRNO_RRETRY;
6197 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6200 /* The domain is OK for routing. Remember if retry data exists so it
6201 can be cleaned up after a successful delivery. */
6205 if (domain_retry_record != NULL || address_retry_record != NULL)
6206 setflag(addr, af_dr_retry_exists);
6207 addr->next = addr_route;
6209 DEBUG(D_deliver|D_route)
6210 debug_printf("%s: queued for routing\n", addr->address);
6214 /* The database is closed while routing is actually happening. Requests to
6215 update it are put on a chain and all processed together at the end. */
6217 if (dbm_file != NULL) dbfn_close(dbm_file);
6219 /* If queue_domains is set, we don't even want to try routing addresses in
6220 those domains. During queue runs, queue_domains is forced to be unset.
6221 Optimize by skipping this pass through the addresses if nothing is set. */
6223 if (!deliver_force && queue_domains != NULL)
6225 address_item *okaddr = NULL;
6226 while (addr_route != NULL)
6228 address_item *addr = addr_route;
6229 addr_route = addr->next;
6231 deliver_domain = addr->domain; /* set $domain */
6232 if ((rc = match_isinlist(addr->domain, (const uschar **)&queue_domains, 0,
6233 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
6238 addr->basic_errno = ERRNO_LISTDEFER;
6239 addr->message = US"queue_domains lookup deferred";
6240 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6244 addr->next = okaddr;
6250 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
6251 addr->message = US"domain is in queue_domains";
6252 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6256 addr_route = okaddr;
6259 /* Now route those addresses that are not deferred. */
6261 while (addr_route != NULL)
6264 address_item *addr = addr_route;
6265 const uschar *old_domain = addr->domain;
6266 uschar *old_unique = addr->unique;
6267 addr_route = addr->next;
6270 /* Just in case some router parameter refers to it. */
6272 return_path = (addr->prop.errors_address != NULL)?
6273 addr->prop.errors_address : sender_address;
6275 /* If a router defers an address, add a retry item. Whether or not to
6276 use the local part in the key is a property of the router. */
6278 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
6279 &addr_succeed, v_none)) == DEFER)
6280 retry_add_item(addr, (addr->router->retry_use_local_part)?
6281 string_sprintf("R:%s@%s", addr->local_part, addr->domain) :
6282 string_sprintf("R:%s", addr->domain), 0);
6284 /* Otherwise, if there is an existing retry record in the database, add
6285 retry items to delete both forms. We must also allow for the possibility
6286 of a routing retry that includes the sender address. Since the domain might
6287 have been rewritten (expanded to fully qualified) as a result of routing,
6288 ensure that the rewritten form is also deleted. */
6290 else if (testflag(addr, af_dr_retry_exists))
6292 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6294 retry_add_item(addr, altkey, rf_delete);
6295 retry_add_item(addr, addr->address_retry_key, rf_delete);
6296 retry_add_item(addr, addr->domain_retry_key, rf_delete);
6297 if (Ustrcmp(addr->domain, old_domain) != 0)
6298 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
6301 /* DISCARD is given for :blackhole: and "seen finish". The event has been
6302 logged, but we need to ensure the address (and maybe parents) is marked
6307 address_done(addr, tod_stamp(tod_log));
6308 continue; /* route next address */
6311 /* The address is finished with (failed or deferred). */
6315 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
6316 continue; /* route next address */
6319 /* The address has been routed. If the router changed the domain, it will
6320 also have changed the unique address. We have to test whether this address
6321 has already been delivered, because it's the unique address that finally
6324 if (addr->unique != old_unique &&
6325 tree_search(tree_nonrecipients, addr->unique) != 0)
6327 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
6328 "discarded\n", addr->address);
6329 if (addr_remote == addr) addr_remote = addr->next;
6330 else if (addr_local == addr) addr_local = addr->next;
6333 /* If the router has same_domain_copy_routing set, we are permitted to copy
6334 the routing for any other addresses with the same domain. This is an
6335 optimisation to save repeated DNS lookups for "standard" remote domain
6336 routing. The option is settable only on routers that generate host lists.
6337 We play it very safe, and do the optimization only if the address is routed
6338 to a remote transport, there are no header changes, and the domain was not
6339 modified by the router. */
6341 if (addr_remote == addr &&
6342 addr->router->same_domain_copy_routing &&
6343 addr->prop.extra_headers == NULL &&
6344 addr->prop.remove_headers == NULL &&
6345 old_domain == addr->domain)
6347 address_item **chain = &addr_route;
6348 while (*chain != NULL)
6350 address_item *addr2 = *chain;
6351 if (Ustrcmp(addr2->domain, addr->domain) != 0)
6353 chain = &(addr2->next);
6357 /* Found a suitable address; take it off the routing list and add it to
6358 the remote delivery list. */
6360 *chain = addr2->next;
6361 addr2->next = addr_remote;
6362 addr_remote = addr2;
6364 /* Copy the routing data */
6366 addr2->domain = addr->domain;
6367 addr2->router = addr->router;
6368 addr2->transport = addr->transport;
6369 addr2->host_list = addr->host_list;
6370 addr2->fallback_hosts = addr->fallback_hosts;
6371 addr2->prop.errors_address = addr->prop.errors_address;
6372 copyflag(addr2, addr, af_hide_child | af_local_host_removed);
6374 DEBUG(D_deliver|D_route)
6376 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6378 "Routing for %s copied from %s\n",
6379 addr2->address, addr2->address, addr->address);
6383 } /* Continue with routing the next address. */
6384 } /* Loop to process any child addresses that the routers created, and
6385 any rerouted addresses that got put back on the new chain. */
6388 /* Debugging: show the results of the routing */
6390 DEBUG(D_deliver|D_retry|D_route)
6392 address_item *p = addr_local;
6393 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6394 debug_printf("After routing:\n Local deliveries:\n");
6397 debug_printf(" %s\n", p->address);
6402 debug_printf(" Remote deliveries:\n");
6405 debug_printf(" %s\n", p->address);
6410 debug_printf(" Failed addresses:\n");
6413 debug_printf(" %s\n", p->address);
6418 debug_printf(" Deferred addresses:\n");
6421 debug_printf(" %s\n", p->address);
6426 /* Free any resources that were cached during routing. */
6431 /* These two variables are set only during routing, after check_local_user.
6432 Ensure they are not set in transports. */
6434 local_user_gid = (gid_t)(-1);
6435 local_user_uid = (uid_t)(-1);
6437 /* Check for any duplicate addresses. This check is delayed until after
6438 routing, because the flexibility of the routing configuration means that
6439 identical addresses with different parentage may end up being redirected to
6440 different addresses. Checking for duplicates too early (as we previously used
6441 to) makes this kind of thing not work. */
6443 do_duplicate_check(&addr_local);
6444 do_duplicate_check(&addr_remote);
6446 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
6447 remote transport. The check that they all end up in one transaction happens in
6448 the do_remote_deliveries() function. */
6450 if (mua_wrapper && (addr_local != NULL || addr_failed != NULL ||
6451 addr_defer != NULL))
6454 uschar *which, *colon, *msg;
6456 if (addr_local != NULL)
6461 else if (addr_defer != NULL)
6464 which = US"deferred";
6472 while (addr->parent != NULL) addr = addr->parent;
6474 if (addr->message != NULL)
6477 msg = addr->message;
6479 else colon = msg = US"";
6481 /* We don't need to log here for a forced failure as it will already
6482 have been logged. Defer will also have been logged, but as a defer, so we do
6483 need to do the failure logging. */
6485 if (addr != addr_failed)
6486 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
6487 addr->address, which);
6489 /* Always write an error to the caller */
6491 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
6494 final_yield = DELIVER_MUA_FAILED;
6495 addr_failed = addr_defer = NULL; /* So that we remove the message */
6496 goto DELIVERY_TIDYUP;
6500 /* If this is a run to continue deliveries to an external channel that is
6501 already set up, defer any local deliveries. */
6503 if (continue_transport != NULL)
6505 if (addr_defer == NULL) addr_defer = addr_local; else
6507 address_item *addr = addr_defer;
6508 while (addr->next != NULL) addr = addr->next;
6509 addr->next = addr_local;
6515 /* Because address rewriting can happen in the routers, we should not really do
6516 ANY deliveries until all addresses have been routed, so that all recipients of
6517 the message get the same headers. However, this is in practice not always
6518 possible, since sometimes remote addresses give DNS timeouts for days on end.
6519 The pragmatic approach is to deliver what we can now, saving any rewritten
6520 headers so that at least the next lot of recipients benefit from the rewriting
6521 that has already been done.
6523 If any headers have been rewritten during routing, update the spool file to
6524 remember them for all subsequent deliveries. This can be delayed till later if
6525 there is only address to be delivered - if it succeeds the spool write need not
6528 if (header_rewritten &&
6529 ((addr_local != NULL &&
6530 (addr_local->next != NULL || addr_remote != NULL)) ||
6531 (addr_remote != NULL && addr_remote->next != NULL)))
6533 /* Panic-dies on error */
6534 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6535 header_rewritten = FALSE;
6539 /* If there are any deliveries to be done, open the journal file. This is used
6540 to record successful deliveries as soon as possible after each delivery is
6541 known to be complete. A file opened with O_APPEND is used so that several
6542 processes can run simultaneously.
6544 The journal is just insurance against crashes. When the spool file is
6545 ultimately updated at the end of processing, the journal is deleted. If a
6546 journal is found to exist at the start of delivery, the addresses listed
6547 therein are added to the non-recipients. */
6549 if (addr_local != NULL || addr_remote != NULL)
6551 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
6552 journal_fd = Uopen(spoolname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE);
6556 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
6557 spoolname, strerror(errno));
6558 return DELIVER_NOT_ATTEMPTED;
6561 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
6562 that the mode is correct - the group setting doesn't always seem to get
6563 set automatically. */
6565 if( fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
6566 || fchown(journal_fd, exim_uid, exim_gid)
6567 || fchmod(journal_fd, SPOOL_MODE)
6570 int ret = Uunlink(spoolname);
6571 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
6572 spoolname, strerror(errno));
6573 if(ret && errno != ENOENT)
6574 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6575 spoolname, strerror(errno));
6576 return DELIVER_NOT_ATTEMPTED;
6582 /* Now we can get down to the business of actually doing deliveries. Local
6583 deliveries are done first, then remote ones. If ever the problems of how to
6584 handle fallback transports are figured out, this section can be put into a loop
6585 for handling fallbacks, though the uid switching will have to be revised. */
6587 /* Precompile a regex that is used to recognize a parameter in response
6588 to an LHLO command, if is isn't already compiled. This may be used on both
6589 local and remote LMTP deliveries. */
6591 if (regex_IGNOREQUOTA == NULL) regex_IGNOREQUOTA =
6592 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
6594 /* Handle local deliveries */
6596 if (addr_local != NULL)
6598 DEBUG(D_deliver|D_transport)
6599 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
6600 do_local_deliveries();
6601 disable_logging = FALSE;
6604 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
6605 so just queue them all. */
6607 if (queue_run_local)
6609 while (addr_remote != NULL)
6611 address_item *addr = addr_remote;
6612 addr_remote = addr->next;
6614 addr->basic_errno = ERRNO_LOCAL_ONLY;
6615 addr->message = US"remote deliveries suppressed";
6616 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
6620 /* Handle remote deliveries */
6622 if (addr_remote != NULL)
6624 DEBUG(D_deliver|D_transport)
6625 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
6627 /* Precompile some regex that are used to recognize parameters in response
6628 to an EHLO command, if they aren't already compiled. */
6632 /* Now sort the addresses if required, and do the deliveries. The yield of
6633 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
6634 cannot be delivered in one transaction. */
6636 if (remote_sort_domains != NULL) sort_remote_deliveries();
6637 if (!do_remote_deliveries(FALSE))
6639 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
6640 "be delivered in one transaction");
6641 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
6643 final_yield = DELIVER_MUA_FAILED;
6644 addr_failed = addr_defer = NULL; /* So that we remove the message */
6645 goto DELIVERY_TIDYUP;
6648 /* See if any of the addresses that failed got put on the queue for delivery
6649 to their fallback hosts. We do it this way because often the same fallback
6650 host is used for many domains, so all can be sent in a single transaction
6651 (if appropriately configured). */
6653 if (addr_fallback != NULL && !mua_wrapper)
6655 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
6656 addr_remote = addr_fallback;
6657 addr_fallback = NULL;
6658 if (remote_sort_domains != NULL) sort_remote_deliveries();
6659 do_remote_deliveries(TRUE);
6661 disable_logging = FALSE;
6665 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6666 phase, to minimize cases of half-done things. */
6669 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6671 /* Root privilege is no longer needed */
6673 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
6675 set_process_info("tidying up after delivering %s", message_id);
6676 signal(SIGTERM, SIG_IGN);
6678 /* When we are acting as an MUA wrapper, the smtp transport will either have
6679 succeeded for all addresses, or failed them all in normal cases. However, there
6680 are some setup situations (e.g. when a named port does not exist) that cause an
6681 immediate exit with deferral of all addresses. Convert those into failures. We
6682 do not ever want to retry, nor do we want to send a bounce message. */
6686 if (addr_defer != NULL)
6688 address_item *addr, *nextaddr;
6689 for (addr = addr_defer; addr != NULL; addr = nextaddr)
6691 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
6692 "delivery", addr->address);
6693 nextaddr = addr->next;
6694 addr->next = addr_failed;
6700 /* Now all should either have succeeded or failed. */
6702 if (addr_failed == NULL) final_yield = DELIVER_MUA_SUCCEEDED; else
6704 uschar *s = (addr_failed->user_message != NULL)?
6705 addr_failed->user_message : addr_failed->message;
6708 fprintf(stderr, "Delivery failed: ");
6709 if (addr_failed->basic_errno > 0)
6711 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
6712 if (s != NULL) fprintf(stderr, ": ");
6714 if ((host = addr_failed->host_used))
6715 fprintf(stderr, "H=%s [%s]: ", host->name, host->address);
6718 if (addr_failed->basic_errno <= 0) fprintf(stderr, "unknown error");
6720 else fprintf(stderr, "%s", CS s);
6721 fprintf(stderr, "\n");
6723 final_yield = DELIVER_MUA_FAILED;
6728 /* In a normal configuration, we now update the retry database. This is done in
6729 one fell swoop at the end in order not to keep opening and closing (and
6730 locking) the database. The code for handling retries is hived off into a
6731 separate module for convenience. We pass it the addresses of the various
6732 chains, because deferred addresses can get moved onto the failed chain if the
6733 retry cutoff time has expired for all alternative destinations. Bypass the
6734 updating of the database if the -N flag is set, which is a debugging thing that
6735 prevents actual delivery. */
6737 else if (!dont_deliver) retry_update(&addr_defer, &addr_failed, &addr_succeed);
6739 /* Send DSN for successful messages */
6740 addr_dsntmp = addr_succeed;
6741 addr_senddsn = NULL;
6745 /* af_ignore_error not honored here. it's not an error */
6748 debug_printf("DSN: processing router : %s\n"
6749 "DSN: processing successful delivery address: %s\n"
6750 "DSN: Sender_address: %s\n"
6751 "DSN: orcpt: %s flags: %d\n"
6752 "DSN: envid: %s ret: %d\n"
6753 "DSN: Final recipient: %s\n"
6754 "DSN: Remote SMTP server supports DSN: %d\n",
6755 addr_dsntmp->router->name,
6756 addr_dsntmp->address,
6758 addr_dsntmp->dsn_orcpt, addr_dsntmp->dsn_flags,
6760 addr_dsntmp->address,
6761 addr_dsntmp->dsn_aware
6765 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
6766 and a report was requested */
6767 if ( ( addr_dsntmp->dsn_aware != dsn_support_yes
6768 || addr_dsntmp->dsn_flags & rf_dsnlasthop
6770 && addr_dsntmp->dsn_flags & rf_dsnflags
6771 && addr_dsntmp->dsn_flags & rf_notify_success
6774 /* copy and relink address_item and send report with all of them at once later */
6775 address_item *addr_next;
6776 addr_next = addr_senddsn;
6777 addr_senddsn = store_get(sizeof(address_item));
6778 memcpy(addr_senddsn, addr_dsntmp, sizeof(address_item));
6779 addr_senddsn->next = addr_next;
6782 DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n");
6784 addr_dsntmp = addr_dsntmp->next;
6792 /* create exim process to send message */
6793 pid = child_open_exim(&fd);
6795 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
6797 if (pid < 0) /* Creation of child failed */
6799 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6800 "create child process to send failure message: %s", getpid(),
6801 getppid(), strerror(errno));
6803 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
6805 else /* Creation of child succeeded */
6807 FILE *f = fdopen(fd, "wb");
6808 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
6809 int topt = topt_add_return_path | topt_no_body;
6813 debug_printf("sending error message to: %s\n", sender_address);
6815 /* build unique id for MIME boundary */
6816 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
6817 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound);
6819 if (errors_reply_to)
6820 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6822 fprintf(f, "Auto-Submitted: auto-generated\n"
6823 "From: Mail Delivery System <Mailer-Daemon@%s>\n"
6825 "Subject: Delivery Status Notification\n"
6826 "Content-Type: multipart/report; report-type=delivery-status; boundary=%s\n"
6827 "MIME-Version: 1.0\n\n"
6830 "Content-type: text/plain; charset=us-ascii\n\n"
6832 "This message was created automatically by mail delivery software.\n"
6833 " ----- The following addresses had successful delivery notifications -----\n",
6834 qualify_domain_sender, sender_address, bound, bound);
6836 for (addr_dsntmp = addr_senddsn; addr_dsntmp;
6837 addr_dsntmp = addr_dsntmp->next)
6838 fprintf(f, "<%s> (relayed %s)\n\n",
6839 addr_dsntmp->address,
6840 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1
6841 ? "via non DSN router"
6842 : addr_dsntmp->dsn_aware == dsn_support_no
6843 ? "to non-DSN-aware mailer"
6844 : "via non \"Remote SMTP\" router"
6848 "Content-type: message/delivery-status\n\n"
6849 "Reporting-MTA: dns; %s\n",
6850 bound, smtp_active_hostname);
6853 { /* must be decoded from xtext: see RFC 3461:6.3a */
6855 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
6856 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
6858 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
6862 for (addr_dsntmp = addr_senddsn;
6864 addr_dsntmp = addr_dsntmp->next)
6866 if (addr_dsntmp->dsn_orcpt)
6867 fprintf(f,"Original-Recipient: %s\n", addr_dsntmp->dsn_orcpt);
6869 fprintf(f, "Action: delivered\n"
6870 "Final-Recipient: rfc822;%s\n"
6872 addr_dsntmp->address);
6874 if (addr_dsntmp->host_used && addr_dsntmp->host_used->name)
6875 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n",
6876 addr_dsntmp->host_used->name);
6878 fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n",
6879 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1 ? "DSN" : "SMTP");
6882 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound);
6885 transport_filter_argv = NULL; /* Just in case */
6886 return_path = sender_address; /* In case not previously set */
6888 /* Write the original email out */
6889 transport_write_message(NULL, fileno(f), topt, 0, NULL, NULL, NULL, NULL, NULL, 0);
6892 fprintf(f,"\n--%s--\n", bound);
6896 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
6900 /* If any addresses failed, we must send a message to somebody, unless
6901 af_ignore_error is set, in which case no action is taken. It is possible for
6902 several messages to get sent if there are addresses with different
6905 while (addr_failed != NULL)
6909 uschar *logtod = tod_stamp(tod_log);
6911 address_item *handled_addr = NULL;
6912 address_item **paddr;
6913 address_item *msgchain = NULL;
6914 address_item **pmsgchain = &msgchain;
6916 /* There are weird cases when logging is disabled in the transport. However,
6917 there may not be a transport (address failed by a router). */
6919 disable_logging = FALSE;
6920 if (addr_failed->transport != NULL)
6921 disable_logging = addr_failed->transport->disable_logging;
6924 debug_printf("processing failed address %s\n", addr_failed->address);
6926 /* There are only two ways an address in a bounce message can get here:
6928 (1) When delivery was initially deferred, but has now timed out (in the call
6929 to retry_update() above). We can detect this by testing for
6930 af_retry_timedout. If the address does not have its own errors address,
6931 we arrange to ignore the error.
6933 (2) If delivery failures for bounce messages are being ignored. We can detect
6934 this by testing for af_ignore_error. This will also be set if a bounce
6935 message has been autothawed and the ignore_bounce_errors_after time has
6936 passed. It might also be set if a router was explicitly configured to
6937 ignore errors (errors_to = "").
6939 If neither of these cases obtains, something has gone wrong. Log the
6940 incident, but then ignore the error. */
6942 if (sender_address[0] == 0 && addr_failed->prop.errors_address == NULL)
6944 if ( !testflag(addr_failed, af_retry_timedout)
6945 && !testflag(addr_failed, af_ignore_error))
6947 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
6948 "failure is neither frozen nor ignored (it's been ignored)");
6950 setflag(addr_failed, af_ignore_error);
6953 /* If the first address on the list has af_ignore_error set, just remove
6954 it from the list, throw away any saved message file, log it, and
6955 mark the recipient done. */
6957 if ( testflag(addr_failed, af_ignore_error)
6958 || ( addr_failed->dsn_flags & rf_dsnflags
6959 && (addr_failed->dsn_flags & rf_notify_failure) != rf_notify_failure)
6963 addr_failed = addr->next;
6964 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
6966 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
6968 !addr->parent ? US"" : US" <",
6969 !addr->parent ? US"" : addr->parent->address,
6970 !addr->parent ? US"" : US">");
6972 address_done(addr, logtod);
6973 child_done(addr, logtod);
6974 /* Panic-dies on error */
6975 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6978 /* Otherwise, handle the sending of a message. Find the error address for
6979 the first address, then send a message that includes all failed addresses
6980 that have the same error address. Note the bounce_recipient is a global so
6981 that it can be accesssed by $bounce_recipient while creating a customized
6986 bounce_recipient = addr_failed->prop.errors_address
6987 ? addr_failed->prop.errors_address : sender_address;
6989 /* Make a subprocess to send a message */
6991 if ((pid = child_open_exim(&fd)) < 0)
6992 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6993 "create child process to send failure message: %s", getpid(),
6994 getppid(), strerror(errno));
6996 /* Creation of child succeeded */
7003 uschar *bcc, *emf_text;
7004 FILE *f = fdopen(fd, "wb");
7006 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
7007 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
7008 DELIVER_IN_BUFFER_SIZE;
7010 uschar *dsnlimitmsg;
7011 uschar *dsnnotifyhdr;
7015 debug_printf("sending error message to: %s\n", bounce_recipient);
7017 /* Scan the addresses for all that have the same errors address, removing
7018 them from the addr_failed chain, and putting them on msgchain. */
7020 paddr = &addr_failed;
7021 for (addr = addr_failed; addr != NULL; addr = *paddr)
7022 if (Ustrcmp(bounce_recipient, addr->prop.errors_address
7023 ? addr->prop.errors_address : sender_address) == 0)
7024 { /* The same - dechain */
7025 *paddr = addr->next;
7028 pmsgchain = &(addr->next);
7031 paddr = &addr->next; /* Not the same; skip */
7033 /* Include X-Failed-Recipients: for automatic interpretation, but do
7034 not let any one header line get too long. We do this by starting a
7035 new header every 50 recipients. Omit any addresses for which the
7036 "hide_child" flag is set. */
7038 for (addr = msgchain; addr != NULL; addr = addr->next)
7040 if (testflag(addr, af_hide_child)) continue;
7047 (rcount++ == 0)? "X-Failed-Recipients: " : ",\n ",
7048 (testflag(addr, af_pfr) && addr->parent != NULL)?
7049 string_printing(addr->parent->address) :
7050 string_printing(addr->address));
7052 if (rcount > 0) fprintf(f, "\n");
7054 /* Output the standard headers */
7056 if (errors_reply_to)
7057 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7058 fprintf(f, "Auto-Submitted: auto-replied\n");
7060 fprintf(f, "To: %s\n", bounce_recipient);
7062 /* generate boundary string and output MIME-Headers */
7063 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7065 fprintf(f, "Content-Type: multipart/report;"
7066 " report-type=delivery-status; boundary=%s\n"
7067 "MIME-Version: 1.0\n",
7070 /* Open a template file if one is provided. Log failure to open, but
7071 carry on - default texts will be used. */
7073 if (bounce_message_file)
7074 if (!(emf = Ufopen(bounce_message_file, "rb")))
7075 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
7076 "message texts: %s", bounce_message_file, strerror(errno));
7078 /* Quietly copy to configured additional addresses if required. */
7080 if ((bcc = moan_check_errorcopy(bounce_recipient)))
7081 fprintf(f, "Bcc: %s\n", bcc);
7083 /* The texts for the message can be read from a template file; if there
7084 isn't one, or if it is too short, built-in texts are used. The first
7085 emf text is a Subject: and any other headers. */
7087 if ((emf_text = next_emf(emf, US"header")))
7088 fprintf(f, "%s\n", emf_text);
7090 fprintf(f, "Subject: Mail delivery failed%s\n\n",
7091 to_sender? ": returning message to sender" : "");
7093 /* output human readable part as text/plain section */
7095 "Content-type: text/plain; charset=us-ascii\n\n",
7098 if ((emf_text = next_emf(emf, US"intro")))
7099 fprintf(f, "%s", CS emf_text);
7103 /* This message has been reworded several times. It seems to be confusing to
7104 somebody, however it is worded. I have retreated to the original, simple
7106 "This message was created automatically by mail delivery software.\n");
7108 if (bounce_message_text)
7109 fprintf(f, "%s", CS bounce_message_text);
7112 "\nA message that you sent could not be delivered to one or more of its\n"
7113 "recipients. This is a permanent error. The following address(es) failed:\n");
7116 "\nA message sent by\n\n <%s>\n\n"
7117 "could not be delivered to one or more of its recipients. The following\n"
7118 "address(es) failed:\n", sender_address);
7122 /* Process the addresses, leaving them on the msgchain if they have a
7123 file name for a return message. (There has already been a check in
7124 post_process_one() for the existence of data in the message file.) A TRUE
7125 return from print_address_information() means that the address is not
7129 for (addr = msgchain; addr != NULL; addr = *paddr)
7131 if (print_address_information(addr, f, US" ", US"\n ", US""))
7132 print_address_error(addr, f, US"");
7134 /* End the final line for the address */
7138 /* Leave on msgchain if there's a return file. */
7140 if (addr->return_file >= 0)
7142 paddr = &(addr->next);
7146 /* Else save so that we can tick off the recipient when the
7151 *paddr = addr->next;
7152 addr->next = handled_addr;
7153 handled_addr = addr;
7159 /* Get the next text, whether we need it or not, so as to be
7160 positioned for the one after. */
7162 emf_text = next_emf(emf, US"generated text");
7164 /* If there were any file messages passed by the local transports,
7165 include them in the message. Then put the address on the handled chain.
7166 In the case of a batch of addresses that were all sent to the same
7167 transport, the return_file field in all of them will contain the same
7168 fd, and the return_filename field in the *last* one will be set (to the
7169 name of the file). */
7173 address_item *nextaddr;
7176 fprintf(f, "%s", CS emf_text);
7179 "The following text was generated during the delivery "
7180 "attempt%s:\n", (filecount > 1)? "s" : "");
7182 for (addr = msgchain; addr != NULL; addr = nextaddr)
7185 address_item *topaddr = addr;
7187 /* List all the addresses that relate to this file */
7190 while(addr) /* Insurance */
7192 print_address_information(addr, f, US"------ ", US"\n ",
7194 if (addr->return_filename) break;
7199 /* Now copy the file */
7201 fm = Ufopen(addr->return_filename, "rb");
7204 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
7208 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
7211 Uunlink(addr->return_filename);
7213 /* Can now add to handled chain, first fishing off the next
7214 address on the msgchain. */
7216 nextaddr = addr->next;
7217 addr->next = handled_addr;
7218 handled_addr = topaddr;
7223 /* output machine readable part */
7224 #ifdef EXPERIMENTAL_INTERNATIONAL
7225 if (message_smtputf8)
7227 "Content-type: message/global-delivery-status\n\n"
7228 "Reporting-MTA: dns; %s\n",
7229 bound, smtp_active_hostname);
7233 "Content-type: message/delivery-status\n\n"
7234 "Reporting-MTA: dns; %s\n",
7235 bound, smtp_active_hostname);
7239 /* must be decoded from xtext: see RFC 3461:6.3a */
7241 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7242 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7244 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
7248 for (addr = handled_addr; addr; addr = addr->next)
7251 fprintf(f, "Action: failed\n"
7252 "Final-Recipient: rfc822;%s\n"
7255 if ((hu = addr->host_used) && hu->name)
7258 fprintf(f, "Remote-MTA: dns; %s\n",
7260 #ifdef EXPERIMENTAL_DSN_INFO
7263 uschar * p = hu->port == 25
7264 ? US"" : string_sprintf(":%d", hu->port);
7265 fprintf(f, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p);
7267 if ((s = addr->smtp_greeting) && *s)
7268 fprintf(f, "X-Remote-MTA-smtp-greeting: X-str; %s\n", s);
7269 if ((s = addr->helo_response) && *s)
7270 fprintf(f, "X-Remote-MTA-helo-response: X-str; %s\n", s);
7271 if ((s = addr->message) && *s)
7272 fprintf(f, "X-Exim-Diagnostic: X-str; %s\n", s);
7274 print_dsn_diagnostic_code(addr, f);
7279 /* Now copy the message, trying to give an intelligible comment if
7280 it is too long for it all to be copied. The limit isn't strictly
7281 applied because of the buffering. There is, however, an option
7282 to suppress copying altogether. */
7284 emf_text = next_emf(emf, US"copy");
7287 we ignore the intro text from template and add
7288 the text for bounce_return_size_limit at the end.
7290 bounce_return_message is ignored
7291 in case RET= is defined we honor these values
7292 otherwise bounce_return_body is honored.
7294 bounce_return_size_limit is always honored.
7297 fprintf(f, "--%s\n", bound);
7299 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7300 dsnnotifyhdr = NULL;
7301 topt = topt_add_return_path;
7303 /* RET=HDRS? top priority */
7304 if (dsn_ret == dsn_ret_hdrs)
7305 topt |= topt_no_body;
7307 /* no full body return at all? */
7308 if (!bounce_return_body)
7310 topt |= topt_no_body;
7311 /* add header if we overrule RET=FULL */
7312 if (dsn_ret == dsn_ret_full)
7313 dsnnotifyhdr = dsnlimitmsg;
7315 /* size limited ... return headers only if limit reached */
7316 else if (bounce_return_size_limit > 0)
7318 struct stat statbuf;
7319 if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max)
7321 topt |= topt_no_body;
7322 dsnnotifyhdr = dsnlimitmsg;
7326 #ifdef EXPERIMENTAL_INTERNATIONAL
7327 if (message_smtputf8)
7328 fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n"
7329 : "Content-type: message/global\n\n",
7333 fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n"
7334 : "Content-type: message/rfc822\n\n",
7338 transport_filter_argv = NULL; /* Just in case */
7339 return_path = sender_address; /* In case not previously set */
7340 transport_write_message(NULL, fileno(f), topt,
7341 0, dsnnotifyhdr, NULL, NULL, NULL, NULL, 0);
7344 /* we never add the final text. close the file */
7348 fprintf(f, "\n--%s--\n", bound);
7350 /* Close the file, which should send an EOF to the child process
7351 that is receiving the message. Wait for it to finish. */
7354 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7356 /* In the test harness, let the child do it's thing first. */
7358 if (running_in_test_harness) millisleep(500);
7360 /* If the process failed, there was some disaster in setting up the
7361 error message. Unless the message is very old, ensure that addr_defer
7362 is non-null, which will have the effect of leaving the message on the
7363 spool. The failed addresses will get tried again next time. However, we
7364 don't really want this to happen too often, so freeze the message unless
7365 there are some genuine deferred addresses to try. To do this we have
7366 to call spool_write_header() here, because with no genuine deferred
7367 addresses the normal code below doesn't get run. */
7372 if (now - received_time < retry_maximum_timeout && addr_defer == NULL)
7374 addr_defer = (address_item *)(+1);
7375 deliver_freeze = TRUE;
7376 deliver_frozen_at = time(NULL);
7377 /* Panic-dies on error */
7378 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7381 deliver_msglog("Process failed (%d) when writing error message "
7382 "to %s%s", rc, bounce_recipient, s);
7383 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
7384 "to %s%s", rc, bounce_recipient, s);
7387 /* The message succeeded. Ensure that the recipients that failed are
7388 now marked finished with on the spool and their parents updated. */
7392 for (addr = handled_addr; addr != NULL; addr = addr->next)
7394 address_done(addr, logtod);
7395 child_done(addr, logtod);
7397 /* Panic-dies on error */
7398 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7404 disable_logging = FALSE; /* In case left set */
7406 /* Come here from the mua_wrapper case if routing goes wrong */
7410 /* If there are now no deferred addresses, we are done. Preserve the
7411 message log if so configured, and we are using them. Otherwise, sling it.
7412 Then delete the message itself. */
7414 if (addr_defer == NULL)
7418 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir,
7420 if (preserve_message_logs)
7423 sprintf(CS big_buffer, "%s/msglog.OLD/%s", spool_directory, id);
7424 if ((rc = Urename(spoolname, big_buffer)) < 0)
7426 (void)directory_make(spool_directory, US"msglog.OLD",
7427 MSGLOG_DIRECTORY_MODE, TRUE);
7428 rc = Urename(spoolname, big_buffer);
7431 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
7432 "msglog.OLD directory", spoolname);
7435 if (Uunlink(spoolname) < 0)
7436 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7437 spoolname, strerror(errno));
7440 /* Remove the two message files. */
7442 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
7443 if (Uunlink(spoolname) < 0)
7444 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7445 spoolname, strerror(errno));
7446 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
7447 if (Uunlink(spoolname) < 0)
7448 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7449 spoolname, strerror(errno));
7451 /* Log the end of this message, with queue time if requested. */
7453 if (LOGGING(queue_time_overall))
7454 log_write(0, LOG_MAIN, "Completed QT=%s",
7455 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
7457 log_write(0, LOG_MAIN, "Completed");
7459 /* Unset deliver_freeze so that we won't try to move the spool files further down */
7460 deliver_freeze = FALSE;
7462 #ifdef EXPERIMENTAL_EVENT
7463 (void) event_raise(event_action, US"msg:complete", NULL);
7467 /* If there are deferred addresses, we are keeping this message because it is
7468 not yet completed. Lose any temporary files that were catching output from
7469 pipes for any of the deferred addresses, handle one-time aliases, and see if
7470 the message has been on the queue for so long that it is time to send a warning
7471 message to the sender, unless it is a mailer-daemon. If all deferred addresses
7472 have the same domain, we can set deliver_domain for the expansion of
7473 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
7474 the parent's domain.
7476 If all the deferred addresses have an error number that indicates "retry time
7477 not reached", skip sending the warning message, because it won't contain the
7478 reason for the delay. It will get sent at the next real delivery attempt.
7479 However, if at least one address has tried, we'd better include all of them in
7482 If we can't make a process to send the message, don't worry.
7484 For mailing list expansions we want to send the warning message to the
7485 mailing list manager. We can't do a perfect job here, as some addresses may
7486 have different errors addresses, but if we take the errors address from
7487 each deferred address it will probably be right in most cases.
7489 If addr_defer == +1, it means there was a problem sending an error message
7490 for failed addresses, and there were no "real" deferred addresses. The value
7491 was set just to keep the message on the spool, so there is nothing to do here.
7494 else if (addr_defer != (address_item *)(+1))
7497 uschar *recipients = US"";
7498 BOOL delivery_attempted = FALSE;
7500 deliver_domain = testflag(addr_defer, af_pfr)?
7501 addr_defer->parent->domain : addr_defer->domain;
7503 for (addr = addr_defer; addr != NULL; addr = addr->next)
7505 address_item *otaddr;
7507 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
7509 if (deliver_domain != NULL)
7511 const uschar *d = testflag(addr, af_pfr)
7512 ? addr->parent->domain : addr->domain;
7514 /* The domain may be unset for an address that has never been routed
7515 because the system filter froze the message. */
7517 if (d == NULL || Ustrcmp(d, deliver_domain) != 0) deliver_domain = NULL;
7520 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
7522 /* Handle the case of one-time aliases. If any address in the ancestry
7523 of this one is flagged, ensure it is in the recipients list, suitably
7524 flagged, and that its parent is marked delivered. */
7526 for (otaddr = addr; otaddr != NULL; otaddr = otaddr->parent)
7527 if (otaddr->onetime_parent != NULL) break;
7532 int t = recipients_count;
7534 for (i = 0; i < recipients_count; i++)
7536 uschar *r = recipients_list[i].address;
7537 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
7538 if (Ustrcmp(otaddr->address, r) == 0) break;
7541 /* Didn't find the address already in the list, and did find the
7542 ultimate parent's address in the list. After adding the recipient,
7543 update the errors address in the recipients list. */
7545 if (i >= recipients_count && t < recipients_count)
7547 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
7548 otaddr->address, otaddr->parent->address);
7549 receive_add_recipient(otaddr->address, t);
7550 recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address;
7551 tree_add_nonrecipient(otaddr->parent->address);
7552 update_spool = TRUE;
7556 /* Except for error messages, ensure that either the errors address for
7557 this deferred address or, if there is none, the sender address, is on the
7558 list of recipients for a warning message. */
7560 if (sender_address[0] != 0)
7562 if (addr->prop.errors_address == NULL)
7564 if (Ustrstr(recipients, sender_address) == NULL)
7565 recipients = string_sprintf("%s%s%s", recipients,
7566 (recipients[0] == 0)? "" : ",", sender_address);
7570 if (Ustrstr(recipients, addr->prop.errors_address) == NULL)
7571 recipients = string_sprintf("%s%s%s", recipients,
7572 (recipients[0] == 0)? "" : ",", addr->prop.errors_address);
7577 /* Send a warning message if the conditions are right. If the condition check
7578 fails because of a lookup defer, there is nothing we can do. The warning
7579 is not sent. Another attempt will be made at the next delivery attempt (if
7583 && delivery_attempted
7584 && ( ((addr_defer->dsn_flags & rf_dsnflags) == 0)
7585 || (addr_defer->dsn_flags & rf_notify_delay) == rf_notify_delay
7587 && delay_warning[1] > 0
7588 && sender_address[0] != 0
7589 && ( delay_warning_condition == NULL
7590 || expand_check_condition(delay_warning_condition,
7591 US"delay_warning", US"option")
7597 int queue_time = time(NULL) - received_time;
7599 /* When running in the test harness, there's an option that allows us to
7600 fudge this time so as to get repeatability of the tests. Take the first
7601 time off the list. In queue runs, the list pointer gets updated in the
7604 if (running_in_test_harness && fudged_queue_times[0] != 0)
7606 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
7609 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
7610 fudged_queue_times);
7615 /* See how many warnings we should have sent by now */
7617 for (count = 0; count < delay_warning[1]; count++)
7618 if (queue_time < delay_warning[count+2]) break;
7620 show_time = delay_warning[count+1];
7622 if (count >= delay_warning[1])
7625 int last_gap = show_time;
7626 if (count > 1) last_gap -= delay_warning[count];
7627 extra = (queue_time - delay_warning[count+1])/last_gap;
7628 show_time += last_gap * extra;
7634 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
7635 debug_printf("warning counts: required %d done %d\n", count,
7639 /* We have computed the number of warnings there should have been by now.
7640 If there haven't been enough, send one, and up the count to what it should
7643 if (warning_count < count)
7647 pid_t pid = child_open_exim(&fd);
7653 FILE *f = fdopen(fd, "wb");
7656 if (warn_message_file)
7658 wmf = Ufopen(warn_message_file, "rb");
7660 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
7661 "message texts: %s", warn_message_file, strerror(errno));
7664 warnmsg_recipients = recipients;
7665 warnmsg_delay = (queue_time < 120*60)?
7666 string_sprintf("%d minutes", show_time/60):
7667 string_sprintf("%d hours", show_time/3600);
7669 if (errors_reply_to)
7670 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7671 fprintf(f, "Auto-Submitted: auto-replied\n");
7673 fprintf(f, "To: %s\n", recipients);
7675 /* generated boundary string and output MIME-Headers */
7676 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7678 fprintf(f, "Content-Type: multipart/report;"
7679 " report-type=delivery-status; boundary=%s\n"
7680 "MIME-Version: 1.0\n",
7683 if ((wmf_text = next_emf(wmf, US"header")))
7684 fprintf(f, "%s\n", wmf_text);
7686 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
7687 message_id, warnmsg_delay);
7689 /* output human readable part as text/plain section */
7691 "Content-type: text/plain; charset=us-ascii\n\n",
7694 if ((wmf_text = next_emf(wmf, US"intro")))
7695 fprintf(f, "%s", CS wmf_text);
7699 "This message was created automatically by mail delivery software.\n");
7701 if (Ustrcmp(recipients, sender_address) == 0)
7703 "A message that you sent has not yet been delivered to one or more of its\n"
7704 "recipients after more than ");
7708 "A message sent by\n\n <%s>\n\n"
7709 "has not yet been delivered to one or more of its recipients after more than \n",
7712 fprintf(f, "%s on the queue on %s.\n\n"
7713 "The message identifier is: %s\n",
7714 warnmsg_delay, primary_hostname, message_id);
7716 for (h = header_list; h != NULL; h = h->next)
7717 if (strncmpic(h->text, US"Subject:", 8) == 0)
7718 fprintf(f, "The subject of the message is: %s", h->text + 9);
7719 else if (strncmpic(h->text, US"Date:", 5) == 0)
7720 fprintf(f, "The date of the message is: %s", h->text + 6);
7723 fprintf(f, "The address%s to which the message has not yet been "
7725 !addr_defer->next ? "" : "es",
7726 !addr_defer->next ? "is": "are");
7729 /* List the addresses, with error information if allowed */
7731 /* store addr_defer for machine readable part */
7732 address_item *addr_dsndefer = addr_defer;
7736 address_item *addr = addr_defer;
7737 addr_defer = addr->next;
7738 if (print_address_information(addr, f, US" ", US"\n ", US""))
7739 print_address_error(addr, f, US"Delay reason: ");
7748 if ((wmf_text = next_emf(wmf, US"final")))
7749 fprintf(f, "%s", CS wmf_text);
7755 "No action is required on your part. Delivery attempts will continue for\n"
7756 "some time, and this warning may be repeated at intervals if the message\n"
7757 "remains undelivered. Eventually the mail delivery software will give up,\n"
7758 "and when that happens, the message will be returned to you.\n");
7761 /* output machine readable part */
7762 fprintf(f, "\n--%s\n"
7763 "Content-type: message/delivery-status\n\n"
7764 "Reporting-MTA: dns; %s\n",
7766 smtp_active_hostname);
7771 /* must be decoded from xtext: see RFC 3461:6.3a */
7773 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7774 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
7776 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
7780 for ( ; addr_dsndefer; addr_dsndefer = addr_dsndefer->next)
7782 if (addr_dsndefer->dsn_orcpt)
7783 fprintf(f, "Original-Recipient: %s\n", addr_dsndefer->dsn_orcpt);
7785 fprintf(f, "Action: delayed\n"
7786 "Final-Recipient: rfc822;%s\n"
7788 addr_dsndefer->address);
7789 if (addr_dsndefer->host_used && addr_dsndefer->host_used->name)
7791 fprintf(f, "Remote-MTA: dns; %s\n",
7792 addr_dsndefer->host_used->name);
7793 print_dsn_diagnostic_code(addr_dsndefer, f);
7799 "Content-type: text/rfc822-headers\n\n",
7803 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7804 int topt = topt_add_return_path | topt_no_body;
7805 transport_filter_argv = NULL; /* Just in case */
7806 return_path = sender_address; /* In case not previously set */
7807 /* Write the original email out */
7808 transport_write_message(NULL, fileno(f), topt, 0, NULL, NULL, NULL, NULL, NULL, 0);
7811 fprintf(f,"\n--%s--\n", bound);
7815 /* Close and wait for child process to complete, without a timeout.
7816 If there's an error, don't update the count. */
7819 if (child_close(pid, 0) == 0)
7821 warning_count = count;
7822 update_spool = TRUE; /* Ensure spool rewritten */
7828 /* Clear deliver_domain */
7830 deliver_domain = NULL;
7832 /* If this was a first delivery attempt, unset the first time flag, and
7833 ensure that the spool gets updated. */
7835 if (deliver_firsttime)
7837 deliver_firsttime = FALSE;
7838 update_spool = TRUE;
7841 /* If delivery was frozen and freeze_tell is set, generate an appropriate
7842 message, unless the message is a local error message (to avoid loops). Then
7843 log the freezing. If the text in "frozen_info" came from a system filter,
7844 it has been escaped into printing characters so as not to mess up log lines.
7845 For the "tell" message, we turn \n back into newline. Also, insert a newline
7846 near the start instead of the ": " string. */
7850 if (freeze_tell != NULL && freeze_tell[0] != 0 && !local_error_message)
7852 uschar *s = string_copy(frozen_info);
7853 uschar *ss = Ustrstr(s, " by the system filter: ");
7864 if (*ss == '\\' && ss[1] == 'n')
7871 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
7872 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
7876 /* Log freezing just before we update the -H file, to minimize the chance
7877 of a race problem. */
7879 deliver_msglog("*** Frozen%s\n", frozen_info);
7880 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
7883 /* If there have been any updates to the non-recipients list, or other things
7884 that get written to the spool, we must now update the spool header file so
7885 that it has the right information for the next delivery attempt. If there
7886 was more than one address being delivered, the header_change update is done
7887 earlier, in case one succeeds and then something crashes. */
7890 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
7891 update_spool, header_rewritten);
7893 if (update_spool || header_rewritten)
7894 /* Panic-dies on error */
7895 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7898 /* Finished with the message log. If the message is complete, it will have
7899 been unlinked or renamed above. */
7901 if (message_logs) (void)fclose(message_log);
7903 /* Now we can close and remove the journal file. Its only purpose is to record
7904 successfully completed deliveries asap so that this information doesn't get
7905 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
7906 not serious, as trying it again is not harmful. The journal might not be open
7907 if all addresses were deferred at routing or directing. Nevertheless, we must
7908 remove it if it exists (may have been lying around from a crash during the
7909 previous delivery attempt). We don't remove the journal if a delivery
7910 subprocess failed to pass back delivery information; this is controlled by
7911 the remove_journal flag. When the journal is left, we also don't move the
7912 message off the main spool if frozen and the option is set. It should get moved
7913 at the next attempt, after the journal has been inspected. */
7915 if (journal_fd >= 0) (void)close(journal_fd);
7919 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
7920 if (Uunlink(spoolname) < 0 && errno != ENOENT)
7921 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", spoolname,
7924 /* Move the message off the spool if reqested */
7926 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
7927 if (deliver_freeze && move_frozen_messages)
7928 (void)spool_move_message(id, message_subdir, US"", US"F");
7932 /* Closing the data file frees the lock; if the file has been unlinked it
7933 will go away. Otherwise the message becomes available for another process
7936 (void)close(deliver_datafile);
7937 deliver_datafile = -1;
7938 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
7940 /* It is unlikely that there will be any cached resources, since they are
7941 released after routing, and in the delivery subprocesses. However, it's
7942 possible for an expansion for something afterwards (for example,
7943 expand_check_condition) to do a lookup. We must therefore be sure everything is
7947 acl_where = ACL_WHERE_UNKNOWN;
7956 if (!regex_PIPELINING) regex_PIPELINING =
7957 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
7959 if (!regex_SIZE) regex_SIZE =
7960 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
7962 if (!regex_AUTH) regex_AUTH =
7963 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
7967 if (!regex_STARTTLS) regex_STARTTLS =
7968 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
7971 #ifndef DISABLE_PRDR
7972 if (!regex_PRDR) regex_PRDR =
7973 regex_must_compile(US"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE, TRUE);
7976 #ifdef EXPERIMENTAL_INTERNATIONAL
7977 if (!regex_UTF8) regex_UTF8 =
7978 regex_must_compile(US"\\n250[\\s\\-]SMTPUTF8(\\s|\\n|$)", FALSE, TRUE);
7981 if (!regex_DSN) regex_DSN =
7982 regex_must_compile(US"\\n250[\\s\\-]DSN(\\s|\\n|$)", FALSE, TRUE);
7984 if (!regex_IGNOREQUOTA) regex_IGNOREQUOTA =
7985 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
7990 deliver_get_sender_address (uschar * id)
7993 uschar * new_sender_address,
7994 * save_sender_address;
7996 if (!spool_open_datafile(id))
7999 /* Save and restore the global sender_address. I'm not sure if we should
8000 not save/restore all the other global variables too, because
8001 spool_read_header() may change all of them. But OTOH, when this
8002 deliver_get_sender_address() gets called, the current message is done
8003 already and nobody needs the globals anymore. (HS12, 2015-08-21) */
8005 sprintf(CS spoolname, "%s-H", id);
8006 save_sender_address = sender_address;
8008 rc = spool_read_header(spoolname, TRUE, TRUE);
8010 new_sender_address = sender_address;
8011 sender_address = save_sender_address;
8013 if (rc != spool_read_OK)
8016 assert(new_sender_address);
8018 (void)close(deliver_datafile);
8019 deliver_datafile = -1;
8021 return new_sender_address;
8026 /* End of deliver.c */