1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2014 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* The main code for delivering a message. */
14 /* Data block for keeping track of subprocesses for parallel remote
17 typedef struct pardata {
18 address_item *addrlist; /* chain of addresses */
19 address_item *addr; /* next address data expected for */
20 pid_t pid; /* subprocess pid */
21 int fd; /* pipe fd for getting result from subprocess */
22 int transport_count; /* returned transport count value */
23 BOOL done; /* no more data needed */
24 uschar *msg; /* error message */
25 uschar *return_path; /* return_path for these addresses */
28 /* Values for the process_recipients variable */
30 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
31 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
34 /* Mutually recursive functions for marking addresses done. */
36 static void child_done(address_item *, uschar *);
37 static void address_done(address_item *, uschar *);
39 /* Table for turning base-62 numbers into binary */
41 static uschar tab62[] =
42 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
43 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
44 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
45 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
46 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
47 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
51 /*************************************************
52 * Local static variables *
53 *************************************************/
55 /* addr_duplicate is global because it needs to be seen from the Envelope-To
58 static address_item *addr_defer = NULL;
59 static address_item *addr_failed = NULL;
60 static address_item *addr_fallback = NULL;
61 static address_item *addr_local = NULL;
62 static address_item *addr_new = NULL;
63 static address_item *addr_remote = NULL;
64 static address_item *addr_route = NULL;
65 static address_item *addr_succeed = NULL;
67 static FILE *message_log = NULL;
68 static BOOL update_spool;
69 static BOOL remove_journal;
70 static int parcount = 0;
71 static pardata *parlist = NULL;
72 static int return_count;
73 static uschar *frozen_info = US"";
74 static uschar *used_return_path = NULL;
76 static uschar spoolname[PATH_MAX];
80 /*************************************************
81 * Make a new address item *
82 *************************************************/
84 /* This function gets the store and initializes with default values. The
85 transport_return value defaults to DEFER, so that any unexpected failure to
86 deliver does not wipe out the message. The default unique string is set to a
87 copy of the address, so that its domain can be lowercased.
90 address the RFC822 address string
91 copy force a copy of the address
93 Returns: a pointer to an initialized address_item
97 deliver_make_addr(uschar *address, BOOL copy)
99 address_item *addr = store_get(sizeof(address_item));
100 *addr = address_defaults;
101 if (copy) address = string_copy(address);
102 addr->address = address;
103 addr->unique = string_copy(address);
110 /*************************************************
111 * Set expansion values for an address *
112 *************************************************/
114 /* Certain expansion variables are valid only when handling an address or
115 address list. This function sets them up or clears the values, according to its
119 addr the address in question, or NULL to clear values
124 deliver_set_expansions(address_item *addr)
128 uschar ***p = address_expansions;
129 while (*p != NULL) **p++ = NULL;
133 /* Exactly what gets set depends on whether there is one or more addresses, and
134 what they contain. These first ones are always set, taking their values from
135 the first address. */
137 if (addr->host_list == NULL)
139 deliver_host = deliver_host_address = US"";
143 deliver_host = addr->host_list->name;
144 deliver_host_address = addr->host_list->address;
147 deliver_recipients = addr;
148 deliver_address_data = addr->p.address_data;
149 deliver_domain_data = addr->p.domain_data;
150 deliver_localpart_data = addr->p.localpart_data;
152 /* These may be unset for multiple addresses */
154 deliver_domain = addr->domain;
155 self_hostname = addr->self_hostname;
157 #ifdef EXPERIMENTAL_BRIGHTMAIL
158 bmi_deliver = 1; /* deliver by default */
159 bmi_alt_location = NULL;
160 bmi_base64_verdict = NULL;
161 bmi_base64_tracker_verdict = NULL;
164 /* If there's only one address we can set everything. */
166 if (addr->next == NULL)
168 address_item *addr_orig;
170 deliver_localpart = addr->local_part;
171 deliver_localpart_prefix = addr->prefix;
172 deliver_localpart_suffix = addr->suffix;
174 for (addr_orig = addr; addr_orig->parent != NULL;
175 addr_orig = addr_orig->parent);
176 deliver_domain_orig = addr_orig->domain;
178 /* Re-instate any prefix and suffix in the original local part. In all
179 normal cases, the address will have a router associated with it, and we can
180 choose the caseful or caseless version accordingly. However, when a system
181 filter sets up a pipe, file, or autoreply delivery, no router is involved.
182 In this case, though, there won't be any prefix or suffix to worry about. */
184 deliver_localpart_orig = (addr_orig->router == NULL)? addr_orig->local_part :
185 addr_orig->router->caseful_local_part?
186 addr_orig->cc_local_part : addr_orig->lc_local_part;
188 /* If there's a parent, make its domain and local part available, and if
189 delivering to a pipe or file, or sending an autoreply, get the local
190 part from the parent. For pipes and files, put the pipe or file string
191 into address_pipe and address_file. */
193 if (addr->parent != NULL)
195 deliver_domain_parent = addr->parent->domain;
196 deliver_localpart_parent = (addr->parent->router == NULL)?
197 addr->parent->local_part :
198 addr->parent->router->caseful_local_part?
199 addr->parent->cc_local_part : addr->parent->lc_local_part;
201 /* File deliveries have their own flag because they need to be picked out
202 as special more often. */
204 if (testflag(addr, af_pfr))
206 if (testflag(addr, af_file)) address_file = addr->local_part;
207 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
208 deliver_localpart = addr->parent->local_part;
209 deliver_localpart_prefix = addr->parent->prefix;
210 deliver_localpart_suffix = addr->parent->suffix;
214 #ifdef EXPERIMENTAL_BRIGHTMAIL
215 /* Set expansion variables related to Brightmail AntiSpam */
216 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
217 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
218 /* get message delivery status (0 - don't deliver | 1 - deliver) */
219 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
220 /* if message is to be delivered, get eventual alternate location */
221 if (bmi_deliver == 1) {
222 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
228 /* For multiple addresses, don't set local part, and leave the domain and
229 self_hostname set only if it is the same for all of them. It is possible to
230 have multiple pipe and file addresses, but only when all addresses have routed
231 to the same pipe or file. */
236 if (testflag(addr, af_pfr))
238 if (testflag(addr, af_file)) address_file = addr->local_part;
239 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
241 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
243 if (deliver_domain != NULL &&
244 Ustrcmp(deliver_domain, addr2->domain) != 0)
245 deliver_domain = NULL;
246 if (self_hostname != NULL && (addr2->self_hostname == NULL ||
247 Ustrcmp(self_hostname, addr2->self_hostname) != 0))
248 self_hostname = NULL;
249 if (deliver_domain == NULL && self_hostname == NULL) break;
257 /*************************************************
258 * Open a msglog file *
259 *************************************************/
261 /* This function is used both for normal message logs, and for files in the
262 msglog directory that are used to catch output from pipes. Try to create the
263 directory if it does not exist. From release 4.21, normal message logs should
264 be created when the message is received.
267 filename the file name
268 mode the mode required
269 error used for saying what failed
271 Returns: a file descriptor, or -1 (with errno set)
275 open_msglog_file(uschar *filename, int mode, uschar **error)
277 int fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
279 if (fd < 0 && errno == ENOENT)
282 sprintf(CS temp, "msglog/%s", message_subdir);
283 if (message_subdir[0] == 0) temp[6] = 0;
284 (void)directory_make(spool_directory, temp, MSGLOG_DIRECTORY_MODE, TRUE);
285 fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
288 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
289 function is called as root). Double check the mode, because the group setting
290 doesn't always get set automatically. */
294 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
295 if (fchown(fd, exim_uid, exim_gid) < 0)
300 if (fchmod(fd, mode) < 0)
306 else *error = US"create";
314 /*************************************************
315 * Write to msglog if required *
316 *************************************************/
318 /* Write to the message log, if configured. This function may also be called
322 format a string format
328 deliver_msglog(const char *format, ...)
331 if (!message_logs) return;
332 va_start(ap, format);
333 vfprintf(message_log, format, ap);
341 /*************************************************
342 * Replicate status for batch *
343 *************************************************/
345 /* When a transport handles a batch of addresses, it may treat them
346 individually, or it may just put the status in the first one, and return FALSE,
347 requesting that the status be copied to all the others externally. This is the
348 replication function. As well as the status, it copies the transport pointer,
349 which may have changed if appendfile passed the addresses on to a different
352 Argument: pointer to the first address in a chain
357 replicate_status(address_item *addr)
360 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
362 addr2->transport = addr->transport;
363 addr2->transport_return = addr->transport_return;
364 addr2->basic_errno = addr->basic_errno;
365 addr2->more_errno = addr->more_errno;
366 addr2->special_action = addr->special_action;
367 addr2->message = addr->message;
368 addr2->user_message = addr->user_message;
374 /*************************************************
375 * Compare lists of hosts *
376 *************************************************/
378 /* This function is given two pointers to chains of host items, and it yields
379 TRUE if the lists refer to the same hosts in the same order, except that
381 (1) Multiple hosts with the same non-negative MX values are permitted to appear
382 in different orders. Round-robinning nameservers can cause this to happen.
384 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
385 permitted to appear in different orders. This is caused by randomizing
388 This enables Exim to use a single SMTP transaction for sending to two entirely
389 different domains that happen to end up pointing at the same hosts.
392 one points to the first host list
393 two points to the second host list
395 Returns: TRUE if the lists refer to the same host set
399 same_hosts(host_item *one, host_item *two)
401 while (one != NULL && two != NULL)
403 if (Ustrcmp(one->name, two->name) != 0)
406 host_item *end_one = one;
407 host_item *end_two = two;
409 /* Batch up only if there was no MX and the list was not randomized */
411 if (mx == MX_NONE) return FALSE;
413 /* Find the ends of the shortest sequence of identical MX values */
415 while (end_one->next != NULL && end_one->next->mx == mx &&
416 end_two->next != NULL && end_two->next->mx == mx)
418 end_one = end_one->next;
419 end_two = end_two->next;
422 /* If there aren't any duplicates, there's no match. */
424 if (end_one == one) return FALSE;
426 /* For each host in the 'one' sequence, check that it appears in the 'two'
427 sequence, returning FALSE if not. */
432 for (hi = two; hi != end_two->next; hi = hi->next)
433 if (Ustrcmp(one->name, hi->name) == 0) break;
434 if (hi == end_two->next) return FALSE;
435 if (one == end_one) break;
439 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
440 Ensure both are pointing at the last host, and carry on as for equality. */
451 /* True if both are NULL */
458 /*************************************************
459 * Compare header lines *
460 *************************************************/
462 /* This function is given two pointers to chains of header items, and it yields
463 TRUE if they are the same header texts in the same order.
466 one points to the first header list
467 two points to the second header list
469 Returns: TRUE if the lists refer to the same header set
473 same_headers(header_line *one, header_line *two)
477 if (one == two) return TRUE; /* Includes the case where both NULL */
478 if (one == NULL || two == NULL) return FALSE;
479 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
487 /*************************************************
488 * Compare string settings *
489 *************************************************/
491 /* This function is given two pointers to strings, and it returns
492 TRUE if they are the same pointer, or if the two strings are the same.
495 one points to the first string
496 two points to the second string
498 Returns: TRUE or FALSE
502 same_strings(uschar *one, uschar *two)
504 if (one == two) return TRUE; /* Includes the case where both NULL */
505 if (one == NULL || two == NULL) return FALSE;
506 return (Ustrcmp(one, two) == 0);
511 /*************************************************
512 * Compare uid/gid for addresses *
513 *************************************************/
515 /* This function is given a transport and two addresses. It yields TRUE if the
516 uid/gid/initgroups settings for the two addresses are going to be the same when
521 addr1 the first address
522 addr2 the second address
524 Returns: TRUE or FALSE
528 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
530 if (!tp->uid_set && tp->expand_uid == NULL && !tp->deliver_as_creator)
532 if (testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set) ||
533 (testflag(addr1, af_uid_set) &&
534 (addr1->uid != addr2->uid ||
535 testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups))))
539 if (!tp->gid_set && tp->expand_gid == NULL)
541 if (testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set) ||
542 (testflag(addr1, af_gid_set) && addr1->gid != addr2->gid))
552 /*************************************************
553 * Record that an address is complete *
554 *************************************************/
556 /* This function records that an address is complete. This is straightforward
557 for most addresses, where the unique address is just the full address with the
558 domain lower cased. For homonyms (addresses that are the same as one of their
559 ancestors) their are complications. Their unique addresses have \x\ prepended
560 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
563 Exim used to record the unique addresses of homonyms as "complete". This,
564 however, fails when the pattern of redirection varies over time (e.g. if taking
565 unseen copies at only some times of day) because the prepended numbers may vary
566 from one delivery run to the next. This problem is solved by never recording
567 prepended unique addresses as complete. Instead, when a homonymic address has
568 actually been delivered via a transport, we record its basic unique address
569 followed by the name of the transport. This is checked in subsequent delivery
570 runs whenever an address is routed to a transport.
572 If the completed address is a top-level one (has no parent, which means it
573 cannot be homonymic) we also add the original address to the non-recipients
574 tree, so that it gets recorded in the spool file and therefore appears as
575 "done" in any spool listings. The original address may differ from the unique
576 address in the case of the domain.
578 Finally, this function scans the list of duplicates, marks as done any that
579 match this address, and calls child_done() for their ancestors.
582 addr address item that has been completed
583 now current time as a string
589 address_done(address_item *addr, uschar *now)
593 update_spool = TRUE; /* Ensure spool gets updated */
595 /* Top-level address */
597 if (addr->parent == NULL)
599 tree_add_nonrecipient(addr->unique);
600 tree_add_nonrecipient(addr->address);
603 /* Homonymous child address */
605 else if (testflag(addr, af_homonym))
607 if (addr->transport != NULL)
609 tree_add_nonrecipient(
610 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
614 /* Non-homonymous child address */
616 else tree_add_nonrecipient(addr->unique);
618 /* Check the list of duplicate addresses and ensure they are now marked
621 for (dup = addr_duplicate; dup != NULL; dup = dup->next)
623 if (Ustrcmp(addr->unique, dup->unique) == 0)
625 tree_add_nonrecipient(dup->unique);
626 child_done(dup, now);
634 /*************************************************
635 * Decrease counts in parents and mark done *
636 *************************************************/
638 /* This function is called when an address is complete. If there is a parent
639 address, its count of children is decremented. If there are still other
640 children outstanding, the function exits. Otherwise, if the count has become
641 zero, address_done() is called to mark the parent and its duplicates complete.
642 Then loop for any earlier ancestors.
645 addr points to the completed address item
646 now the current time as a string, for writing to the message log
652 child_done(address_item *addr, uschar *now)
655 while (addr->parent != NULL)
658 if ((addr->child_count -= 1) > 0) return; /* Incomplete parent */
659 address_done(addr, now);
661 /* Log the completion of all descendents only when there is no ancestor with
662 the same original address. */
664 for (aa = addr->parent; aa != NULL; aa = aa->parent)
665 if (Ustrcmp(aa->address, addr->address) == 0) break;
666 if (aa != NULL) continue;
668 deliver_msglog("%s %s: children all complete\n", now, addr->address);
669 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
677 d_hostlog(uschar * s, int * sizep, int * ptrp, address_item * addr)
679 s = string_append(s, sizep, ptrp, 5, US" H=", addr->host_used->name,
680 US" [", addr->host_used->address, US"]");
681 if ((log_extra_selector & LX_outgoing_port) != 0)
682 s = string_append(s, sizep, ptrp, 2, US":", string_sprintf("%d",
683 addr->host_used->port));
689 d_tlslog(uschar * s, int * sizep, int * ptrp, address_item * addr)
691 if ((log_extra_selector & LX_tls_cipher) != 0 && addr->cipher != NULL)
692 s = string_append(s, sizep, ptrp, 2, US" X=", addr->cipher);
693 if ((log_extra_selector & LX_tls_certificate_verified) != 0 &&
694 addr->cipher != NULL)
695 s = string_append(s, sizep, ptrp, 2, US" CV=",
696 testflag(addr, af_cert_verified)? "yes":"no");
697 if ((log_extra_selector & LX_tls_peerdn) != 0 && addr->peerdn != NULL)
698 s = string_append(s, sizep, ptrp, 3, US" DN=\"",
699 string_printing(addr->peerdn), US"\"");
704 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
705 this is a nonstandard call; no two-character delivery flag is written
706 but sender-host and sender are prefixed and "msg" is inserted in the log line.
709 flags passed to log_write()
712 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
715 int size = 256; /* Used for a temporary, */
716 int ptr = 0; /* expanding buffer, for */
717 uschar *s; /* building log lines; */
718 void *reset_point; /* released afterwards. */
721 DEBUG(D_deliver) debug_printf("B cipher %s\n", addr->cipher);
722 /* Log the delivery on the main log. We use an extensible string to build up
723 the log line, and reset the store afterwards. Remote deliveries should always
724 have a pointer to the host item that succeeded; local deliveries can have a
725 pointer to a single host item in their host list, for use by the transport. */
727 #ifdef EXPERIMENTAL_TPDA
728 tpda_delivery_ip = NULL; /* presume no successful remote delivery */
729 tpda_delivery_port = 0;
730 tpda_delivery_fqdn = NULL;
731 tpda_delivery_local_part = NULL;
732 tpda_delivery_domain = NULL;
733 tpda_delivery_confirmation = NULL;
736 s = reset_point = store_get(size);
738 DEBUG(D_deliver) debug_printf("C cipher %s\n", addr->cipher);
739 log_address = string_log_address(addr, (log_write_selector & L_all_parents) != 0, TRUE);
741 s = string_append(s, &size, &ptr, 3, host_and_ident(TRUE), US" ", log_address);
745 s = string_append(s, &size, &ptr, 2, US"> ", log_address);
748 if ((log_extra_selector & LX_sender_on_delivery) != 0 || msg)
749 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
751 #ifdef EXPERIMENTAL_SRS
752 if(addr->p.srs_sender)
753 s = string_append(s, &size, &ptr, 3, US" SRS=<", addr->p.srs_sender, US">");
756 /* You might think that the return path must always be set for a successful
757 delivery; indeed, I did for some time, until this statement crashed. The case
758 when it is not set is for a delivery to /dev/null which is optimised by not
761 if (used_return_path != NULL &&
762 (log_extra_selector & LX_return_path_on_delivery) != 0)
763 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
766 s = string_append(s, &size, &ptr, 2, US" ", msg);
768 /* For a delivery from a system filter, there may not be a router */
769 if (addr->router != NULL)
770 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
772 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
774 if ((log_extra_selector & LX_delivery_size) != 0)
775 s = string_append(s, &size, &ptr, 2, US" S=",
776 string_sprintf("%d", transport_count));
780 if (addr->transport->info->local)
782 if (addr->host_list != NULL)
784 s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name);
785 #ifdef EXPERIMENTAL_TPDA
786 tpda_delivery_fqdn = addr->host_list->name;
789 if (addr->shadow_message != NULL)
790 s = string_cat(s, &size, &ptr, addr->shadow_message,
791 Ustrlen(addr->shadow_message));
794 /* Remote delivery */
798 if (addr->host_used != NULL)
800 s = d_hostlog(s, &size, &ptr, addr);
801 if (continue_sequence > 1)
802 s = string_cat(s, &size, &ptr, US"*", 1);
804 #ifdef EXPERIMENTAL_TPDA
805 tpda_delivery_ip = addr->host_used->address;
806 tpda_delivery_port = addr->host_used->port;
807 tpda_delivery_fqdn = addr->host_used->name;
808 tpda_delivery_local_part = addr->local_part;
809 tpda_delivery_domain = addr->domain;
810 tpda_delivery_confirmation = addr->message;
815 s = d_tlslog(s, &size, &ptr, addr);
818 if (addr->authenticator)
820 s = string_append(s, &size, &ptr, 2, US" A=", addr->authenticator);
823 s = string_append(s, &size, &ptr, 2, US":", addr->auth_id);
824 if (log_extra_selector & LX_smtp_mailauth && addr->auth_sndr)
825 s = string_append(s, &size, &ptr, 2, US":", addr->auth_sndr);
829 #ifdef EXPERIMENTAL_PRDR
830 if (addr->flags & af_prdr_used)
831 s = string_append(s, &size, &ptr, 1, US" PRDR");
835 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
837 if ((log_extra_selector & LX_smtp_confirmation) != 0 &&
838 addr->message != NULL &&
839 ((addr->host_used != NULL) || (Ustrcmp(addr->transport->driver_name, "lmtp") == 0)))
842 uschar *p = big_buffer;
843 uschar *ss = addr->message;
845 for (i = 0; i < 100 && ss[i] != 0; i++)
847 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\';
852 s = string_append(s, &size, &ptr, 2, US" C=", big_buffer);
855 /* Time on queue and actual time taken to deliver */
857 if ((log_extra_selector & LX_queue_time) != 0)
859 s = string_append(s, &size, &ptr, 2, US" QT=",
860 readconf_printtime(time(NULL) - received_time));
863 if ((log_extra_selector & LX_deliver_time) != 0)
865 s = string_append(s, &size, &ptr, 2, US" DT=",
866 readconf_printtime(addr->more_errno));
869 /* string_cat() always leaves room for the terminator. Release the
870 store we used to build the line after writing it. */
873 log_write(0, flags, "%s", s);
875 #ifdef EXPERIMENTAL_TPDA
876 if (addr->transport->tpda_delivery_action)
879 debug_printf(" TPDA(Delivery): tpda_deliver_action=|%s| tpda_delivery_IP=%s\n",
880 addr->transport->tpda_delivery_action, tpda_delivery_ip);
881 DEBUG(D_deliver) debug_printf("D cipher %s\n", addr->cipher);
883 router_name = addr->router->name;
884 transport_name = addr->transport->name;
885 if (!expand_string(addr->transport->tpda_delivery_action) && *expand_string_message)
886 log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand tpda_deliver_action in %s: %s\n",
887 transport_name, expand_string_message);
889 transport_name = NULL;
892 store_reset(reset_point);
898 /*************************************************
899 * Actions at the end of handling an address *
900 *************************************************/
902 /* This is a function for processing a single address when all that can be done
903 with it has been done.
906 addr points to the address block
907 result the result of the delivery attempt
908 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
909 driver_type indicates which type of driver (transport, or router) was last
910 to process the address
911 logchar '=' or '-' for use when logging deliveries with => or ->
917 post_process_one(address_item *addr, int result, int logflags, int driver_type,
920 uschar *now = tod_stamp(tod_log);
921 uschar *driver_kind = NULL;
922 uschar *driver_name = NULL;
925 int size = 256; /* Used for a temporary, */
926 int ptr = 0; /* expanding buffer, for */
927 uschar *s; /* building log lines; */
928 void *reset_point; /* released afterwards. */
931 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
933 /* Set up driver kind and name for logging. Disable logging if the router or
934 transport has disabled it. */
936 if (driver_type == DTYPE_TRANSPORT)
938 if (addr->transport != NULL)
940 driver_name = addr->transport->name;
941 driver_kind = US" transport";
942 disable_logging = addr->transport->disable_logging;
944 else driver_kind = US"transporting";
946 else if (driver_type == DTYPE_ROUTER)
948 if (addr->router != NULL)
950 driver_name = addr->router->name;
951 driver_kind = US" router";
952 disable_logging = addr->router->disable_logging;
954 else driver_kind = US"routing";
957 /* If there's an error message set, ensure that it contains only printing
958 characters - it should, but occasionally things slip in and this at least
959 stops the log format from getting wrecked. We also scan the message for an LDAP
960 expansion item that has a password setting, and flatten the password. This is a
961 fudge, but I don't know a cleaner way of doing this. (If the item is badly
962 malformed, it won't ever have gone near LDAP.) */
964 if (addr->message != NULL)
966 addr->message = string_printing(addr->message);
967 if (((Ustrstr(addr->message, "failed to expand") != NULL) || (Ustrstr(addr->message, "expansion of ") != NULL)) &&
968 (Ustrstr(addr->message, "mysql") != NULL ||
969 Ustrstr(addr->message, "pgsql") != NULL ||
970 #ifdef EXPERIMENTAL_REDIS
971 Ustrstr(addr->message, "redis") != NULL ||
973 Ustrstr(addr->message, "sqlite") != NULL ||
974 Ustrstr(addr->message, "ldap:") != NULL ||
975 Ustrstr(addr->message, "ldapdn:") != NULL ||
976 Ustrstr(addr->message, "ldapm:") != NULL))
978 addr->message = string_sprintf("Temporary internal error");
982 /* If we used a transport that has one of the "return_output" options set, and
983 if it did in fact generate some output, then for return_output we treat the
984 message as failed if it was not already set that way, so that the output gets
985 returned to the sender, provided there is a sender to send it to. For
986 return_fail_output, do this only if the delivery failed. Otherwise we just
987 unlink the file, and remove the name so that if the delivery failed, we don't
988 try to send back an empty or unwanted file. The log_output options operate only
991 In any case, we close the message file, because we cannot afford to leave a
992 file-descriptor for one address while processing (maybe very many) others. */
994 if (addr->return_file >= 0 && addr->return_filename != NULL)
996 BOOL return_output = FALSE;
998 (void)EXIMfsync(addr->return_file);
1000 /* If there is no output, do nothing. */
1002 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1004 transport_instance *tb = addr->transport;
1006 /* Handle logging options */
1008 if (tb->log_output || (result == FAIL && tb->log_fail_output) ||
1009 (result == DEFER && tb->log_defer_output))
1012 FILE *f = Ufopen(addr->return_filename, "rb");
1014 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1015 "from %s transport: %s", addr->return_filename, tb->name,
1019 s = US Ufgets(big_buffer, big_buffer_size, f);
1022 uschar *p = big_buffer + Ustrlen(big_buffer);
1023 while (p > big_buffer && isspace(p[-1])) p--;
1025 s = string_printing(big_buffer);
1026 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1027 addr->address, tb->name, s);
1033 /* Handle returning options, but only if there is an address to return
1036 if (sender_address[0] != 0 || addr->p.errors_address != NULL)
1038 if (tb->return_output)
1040 addr->transport_return = result = FAIL;
1041 if (addr->basic_errno == 0 && addr->message == NULL)
1042 addr->message = US"return message generated";
1043 return_output = TRUE;
1046 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1050 /* Get rid of the file unless it might be returned, but close it in
1055 Uunlink(addr->return_filename);
1056 addr->return_filename = NULL;
1057 addr->return_file = -1;
1060 (void)close(addr->return_file);
1063 /* The success case happens only after delivery by a transport. */
1067 addr->next = addr_succeed;
1068 addr_succeed = addr;
1070 /* Call address_done() to ensure that we don't deliver to this address again,
1071 and write appropriate things to the message log. If it is a child address, we
1072 call child_done() to scan the ancestors and mark them complete if this is the
1073 last child to complete. */
1075 address_done(addr, now);
1076 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1078 if (addr->parent == NULL)
1079 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1080 driver_name, driver_kind);
1083 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1084 addr->parent->address, driver_name, driver_kind);
1085 child_done(addr, now);
1088 /* Certificates for logging (via TPDA) */
1090 tls_out.ourcert = addr->ourcert;
1091 addr->ourcert = NULL;
1092 tls_out.peercert = addr->peercert;
1093 addr->peercert = NULL;
1095 DEBUG(D_deliver) debug_printf("A cipher %s\n", addr->cipher);
1096 tls_out.cipher = addr->cipher;
1097 tls_out.peerdn = addr->peerdn;
1098 tls_out.ocsp = addr->ocsp;
1101 delivery_log(LOG_MAIN, addr, logchar, NULL);
1104 if (tls_out.ourcert)
1106 tls_free_cert(tls_out.ourcert);
1107 tls_out.ourcert = NULL;
1109 if (tls_out.peercert)
1111 tls_free_cert(tls_out.peercert);
1112 tls_out.peercert = NULL;
1114 tls_out.cipher = NULL;
1115 tls_out.peerdn = NULL;
1116 tls_out.ocsp = OCSP_NOT_REQ;
1121 /* Soft failure, or local delivery process failed; freezing may be
1124 else if (result == DEFER || result == PANIC)
1126 if (result == PANIC) logflags |= LOG_PANIC;
1128 /* This puts them on the chain in reverse order. Do not change this, because
1129 the code for handling retries assumes that the one with the retry
1130 information is last. */
1132 addr->next = addr_defer;
1135 /* The only currently implemented special action is to freeze the
1136 message. Logging of this is done later, just before the -H file is
1139 if (addr->special_action == SPECIAL_FREEZE)
1141 deliver_freeze = TRUE;
1142 deliver_frozen_at = time(NULL);
1143 update_spool = TRUE;
1146 /* If doing a 2-stage queue run, we skip writing to either the message
1147 log or the main log for SMTP defers. */
1149 if (!queue_2stage || addr->basic_errno != 0)
1153 /* For errors of the type "retry time not reached" (also remotes skipped
1154 on queue run), logging is controlled by L_retry_defer. Note that this kind
1155 of error number is negative, and all the retry ones are less than any
1158 unsigned int use_log_selector = (addr->basic_errno <= ERRNO_RETRY_BASE)?
1161 /* Build up the line that is used for both the message log and the main
1164 s = reset_point = store_get(size);
1166 /* Create the address string for logging. Must not do this earlier, because
1167 an OK result may be changed to FAIL when a pipe returns text. */
1169 log_address = string_log_address(addr,
1170 (log_write_selector & L_all_parents) != 0, result == OK);
1172 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1174 /* Either driver_name contains something and driver_kind contains
1175 " router" or " transport" (note the leading space), or driver_name is
1176 a null string and driver_kind contains "routing" without the leading
1177 space, if all routing has been deferred. When a domain has been held,
1178 so nothing has been done at all, both variables contain null strings. */
1180 if (driver_name == NULL)
1182 if (driver_kind != NULL)
1183 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1187 if (driver_kind[1] == 't' && addr->router != NULL)
1188 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1190 ss[1] = toupper(driver_kind[1]);
1191 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1194 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1195 s = string_cat(s, &size, &ptr, ss, Ustrlen(ss));
1197 if (addr->basic_errno > 0)
1198 s = string_append(s, &size, &ptr, 2, US": ",
1199 US strerror(addr->basic_errno));
1201 if (addr->message != NULL)
1202 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1206 /* Log the deferment in the message log, but don't clutter it
1207 up with retry-time defers after the first delivery attempt. */
1209 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1210 deliver_msglog("%s %s\n", now, s);
1212 /* Write the main log and reset the store */
1214 log_write(use_log_selector, logflags, "== %s", s);
1215 store_reset(reset_point);
1220 /* Hard failure. If there is an address to which an error message can be sent,
1221 put this address on the failed list. If not, put it on the deferred list and
1222 freeze the mail message for human attention. The latter action can also be
1223 explicitly requested by a router or transport. */
1227 /* If this is a delivery error, or a message for which no replies are
1228 wanted, and the message's age is greater than ignore_bounce_errors_after,
1229 force the af_ignore_error flag. This will cause the address to be discarded
1230 later (with a log entry). */
1232 if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
1233 setflag(addr, af_ignore_error);
1235 /* Freeze the message if requested, or if this is a bounce message (or other
1236 message with null sender) and this address does not have its own errors
1237 address. However, don't freeze if errors are being ignored. The actual code
1238 to ignore occurs later, instead of sending a message. Logging of freezing
1239 occurs later, just before writing the -H file. */
1241 if (!testflag(addr, af_ignore_error) &&
1242 (addr->special_action == SPECIAL_FREEZE ||
1243 (sender_address[0] == 0 && addr->p.errors_address == NULL)
1246 frozen_info = (addr->special_action == SPECIAL_FREEZE)? US"" :
1247 (sender_local && !local_error_message)?
1248 US" (message created with -f <>)" : US" (delivery error message)";
1249 deliver_freeze = TRUE;
1250 deliver_frozen_at = time(NULL);
1251 update_spool = TRUE;
1253 /* The address is put on the defer rather than the failed queue, because
1254 the message is being retained. */
1256 addr->next = addr_defer;
1260 /* Don't put the address on the nonrecipients tree yet; wait until an
1261 error message has been successfully sent. */
1265 addr->next = addr_failed;
1269 /* Build up the log line for the message and main logs */
1271 s = reset_point = store_get(size);
1273 /* Create the address string for logging. Must not do this earlier, because
1274 an OK result may be changed to FAIL when a pipe returns text. */
1276 log_address = string_log_address(addr,
1277 (log_write_selector & L_all_parents) != 0, result == OK);
1279 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1281 if ((log_extra_selector & LX_sender_on_delivery) != 0)
1282 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1284 /* Return path may not be set if no delivery actually happened */
1286 if (used_return_path != NULL &&
1287 (log_extra_selector & LX_return_path_on_delivery) != 0)
1288 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1290 if (addr->router != NULL)
1291 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1292 if (addr->transport != NULL)
1293 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1295 if (addr->host_used != NULL)
1296 s = d_hostlog(s, &size, &ptr, addr);
1299 s = d_tlslog(s, &size, &ptr, addr);
1302 if (addr->basic_errno > 0)
1303 s = string_append(s, &size, &ptr, 2, US": ",
1304 US strerror(addr->basic_errno));
1306 if (addr->message != NULL)
1307 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1311 /* Do the logging. For the message log, "routing failed" for those cases,
1312 just to make it clearer. */
1314 if (driver_name == NULL)
1315 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1317 deliver_msglog("%s %s\n", now, s);
1319 log_write(0, LOG_MAIN, "** %s", s);
1320 store_reset(reset_point);
1323 /* Ensure logging is turned on again in all cases */
1325 disable_logging = FALSE;
1331 /*************************************************
1332 * Address-independent error *
1333 *************************************************/
1335 /* This function is called when there's an error that is not dependent on a
1336 particular address, such as an expansion string failure. It puts the error into
1337 all the addresses in a batch, logs the incident on the main and panic logs, and
1338 clears the expansions. It is mostly called from local_deliver(), but can be
1339 called for a remote delivery via findugid().
1342 logit TRUE if (MAIN+PANIC) logging required
1343 addr the first of the chain of addresses
1345 format format string for error message, or NULL if already set in addr
1346 ... arguments for the format
1352 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1354 address_item *addr2;
1355 addr->basic_errno = code;
1361 va_start(ap, format);
1362 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1363 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1364 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1366 addr->message = string_copy(buffer);
1369 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
1371 addr2->basic_errno = code;
1372 addr2->message = addr->message;
1375 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1376 deliver_set_expansions(NULL);
1382 /*************************************************
1383 * Check a "never users" list *
1384 *************************************************/
1386 /* This function is called to check whether a uid is on one of the two "never
1390 uid the uid to be checked
1391 nusers the list to be scanned; the first item in the list is the count
1393 Returns: TRUE if the uid is on the list
1397 check_never_users(uid_t uid, uid_t *nusers)
1400 if (nusers == NULL) return FALSE;
1401 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1407 /*************************************************
1408 * Find uid and gid for a transport *
1409 *************************************************/
1411 /* This function is called for both local and remote deliveries, to find the
1412 uid/gid under which to run the delivery. The values are taken preferentially
1413 from the transport (either explicit or deliver_as_creator), then from the
1414 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1415 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1416 panic error is logged, and the function fails (which normally leads to delivery
1420 addr the address (possibly a chain)
1422 uidp pointer to uid field
1423 gidp pointer to gid field
1424 igfp pointer to the use_initgroups field
1426 Returns: FALSE if failed - error has been set in address(es)
1430 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1433 uschar *nuname = NULL;
1434 BOOL gid_set = FALSE;
1436 /* Default initgroups flag comes from the transport */
1438 *igfp = tp->initgroups;
1440 /* First see if there's a gid on the transport, either fixed or expandable.
1441 The expanding function always logs failure itself. */
1448 else if (tp->expand_gid != NULL)
1450 if (route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1451 &(addr->message))) gid_set = TRUE;
1454 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1459 /* If the transport did not set a group, see if the router did. */
1461 if (!gid_set && testflag(addr, af_gid_set))
1467 /* Pick up a uid from the transport if one is set. */
1469 if (tp->uid_set) *uidp = tp->uid;
1471 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1472 it does not provide a passwd value from which a gid can be taken. */
1474 else if (tp->expand_uid != NULL)
1477 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1478 uidp, &(addr->message)))
1480 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1483 if (!gid_set && pw != NULL)
1490 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1492 else if (tp->deliver_as_creator)
1494 *uidp = originator_uid;
1497 *gidp = originator_gid;
1502 /* Otherwise see if the address specifies the uid and if so, take it and its
1505 else if (testflag(addr, af_uid_set))
1508 *igfp = testflag(addr, af_initgroups);
1511 /* Nothing has specified the uid - default to the Exim user, and group if the
1524 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1525 defaulting to the Exim uid. In other words, if the configuration has specified
1526 a uid, it must also provide a gid. */
1530 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1531 "%s transport", tp->name);
1535 /* Check that the uid is not on the lists of banned uids that may not be used
1536 for delivery processes. */
1538 if (check_never_users(*uidp, never_users))
1539 nuname = US"never_users";
1540 else if (check_never_users(*uidp, fixed_never_users))
1541 nuname = US"fixed_never_users";
1545 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1546 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1558 /*************************************************
1559 * Check the size of a message for a transport *
1560 *************************************************/
1562 /* Checks that the message isn't too big for the selected transport.
1563 This is called only when it is known that the limit is set.
1567 addr the (first) address being delivered
1570 DEFER expansion failed or did not yield an integer
1571 FAIL message too big
1575 check_message_size(transport_instance *tp, address_item *addr)
1580 deliver_set_expansions(addr);
1581 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1582 deliver_set_expansions(NULL);
1584 if (expand_string_message != NULL)
1587 if (size_limit == -1)
1588 addr->message = string_sprintf("failed to expand message_size_limit "
1589 "in %s transport: %s", tp->name, expand_string_message);
1591 addr->message = string_sprintf("invalid message_size_limit "
1592 "in %s transport: %s", tp->name, expand_string_message);
1594 else if (size_limit > 0 && message_size > size_limit)
1598 string_sprintf("message is too big (transport limit = %d)",
1607 /*************************************************
1608 * Transport-time check for a previous delivery *
1609 *************************************************/
1611 /* Check that this base address hasn't previously been delivered to its routed
1612 transport. If it has been delivered, mark it done. The check is necessary at
1613 delivery time in order to handle homonymic addresses correctly in cases where
1614 the pattern of redirection changes between delivery attempts (so the unique
1615 fields change). Non-homonymic previous delivery is detected earlier, at routing
1616 time (which saves unnecessary routing).
1619 addr the address item
1620 testing TRUE if testing wanted only, without side effects
1622 Returns: TRUE if previously delivered by the transport
1626 previously_transported(address_item *addr, BOOL testing)
1628 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
1629 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
1631 if (tree_search(tree_nonrecipients, big_buffer) != 0)
1633 DEBUG(D_deliver|D_route|D_transport)
1634 debug_printf("%s was previously delivered (%s transport): discarded\n",
1635 addr->address, addr->transport->name);
1636 if (!testing) child_done(addr, tod_stamp(tod_log));
1645 /******************************************************
1646 * Check for a given header in a header string *
1647 ******************************************************/
1649 /* This function is used when generating quota warnings. The configuration may
1650 specify any header lines it likes in quota_warn_message. If certain of them are
1651 missing, defaults are inserted, so we need to be able to test for the presence
1655 hdr the required header name
1656 hstring the header string
1658 Returns: TRUE the header is in the string
1659 FALSE the header is not in the string
1663 contains_header(uschar *hdr, uschar *hstring)
1665 int len = Ustrlen(hdr);
1666 uschar *p = hstring;
1669 if (strncmpic(p, hdr, len) == 0)
1672 while (*p == ' ' || *p == '\t') p++;
1673 if (*p == ':') return TRUE;
1675 while (*p != 0 && *p != '\n') p++;
1676 if (*p == '\n') p++;
1684 /*************************************************
1685 * Perform a local delivery *
1686 *************************************************/
1688 /* Each local delivery is performed in a separate process which sets its
1689 uid and gid as specified. This is a safer way than simply changing and
1690 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
1691 used safely. From release 4, Exim no longer makes any use of it. Besides, not
1692 all systems have seteuid().
1694 If the uid/gid are specified in the transport_instance, they are used; the
1695 transport initialization must ensure that either both or neither are set.
1696 Otherwise, the values associated with the address are used. If neither are set,
1697 it is a configuration error.
1699 The transport or the address may specify a home directory (transport over-
1700 rides), and if they do, this is set as $home. If neither have set a working
1701 directory, this value is used for that as well. Otherwise $home is left unset
1702 and the cwd is set to "/" - a directory that should be accessible to all users.
1704 Using a separate process makes it more complicated to get error information
1705 back. We use a pipe to pass the return code and also an error code and error
1706 text string back to the parent process.
1709 addr points to an address block for this delivery; for "normal" local
1710 deliveries this is the only address to be delivered, but for
1711 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
1712 a number of addresses can be handled simultaneously, and in this
1713 case addr will point to a chain of addresses with the same
1716 shadowing TRUE if running a shadow transport; this causes output from pipes
1723 deliver_local(address_item *addr, BOOL shadowing)
1725 BOOL use_initgroups;
1728 int status, len, rc;
1731 uschar *working_directory;
1732 address_item *addr2;
1733 transport_instance *tp = addr->transport;
1735 /* Set up the return path from the errors or sender address. If the transport
1736 has its own return path setting, expand it and replace the existing value. */
1738 if(addr->p.errors_address != NULL)
1739 return_path = addr->p.errors_address;
1740 #ifdef EXPERIMENTAL_SRS
1741 else if(addr->p.srs_sender != NULL)
1742 return_path = addr->p.srs_sender;
1745 return_path = sender_address;
1747 if (tp->return_path != NULL)
1749 uschar *new_return_path = expand_string(tp->return_path);
1750 if (new_return_path == NULL)
1752 if (!expand_string_forcedfail)
1754 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
1755 US"Failed to expand return path \"%s\" in %s transport: %s",
1756 tp->return_path, tp->name, expand_string_message);
1760 else return_path = new_return_path;
1763 /* For local deliveries, one at a time, the value used for logging can just be
1764 set directly, once and for all. */
1766 used_return_path = return_path;
1768 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
1769 gets put into the address(es), and the expansions are unset, so we can just
1772 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
1774 /* See if either the transport or the address specifies a home directory. A
1775 home directory set in the address may already be expanded; a flag is set to
1776 indicate that. In other cases we must expand it. */
1778 if ((deliver_home = tp->home_dir) != NULL || /* Set in transport, or */
1779 ((deliver_home = addr->home_dir) != NULL && /* Set in address and */
1780 !testflag(addr, af_home_expanded))) /* not expanded */
1782 uschar *rawhome = deliver_home;
1783 deliver_home = NULL; /* in case it contains $home */
1784 deliver_home = expand_string(rawhome);
1785 if (deliver_home == NULL)
1787 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
1788 "to expand for %s transport: %s", rawhome, tp->name,
1789 expand_string_message);
1792 if (*deliver_home != '/')
1794 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
1795 "is not absolute for %s transport", deliver_home, tp->name);
1800 /* See if either the transport or the address specifies a current directory,
1801 and if so, expand it. If nothing is set, use the home directory, unless it is
1802 also unset in which case use "/", which is assumed to be a directory to which
1803 all users have access. It is necessary to be in a visible directory for some
1804 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
1805 2.5) require this. */
1807 working_directory = (tp->current_dir != NULL)?
1808 tp->current_dir : addr->current_dir;
1810 if (working_directory != NULL)
1812 uschar *raw = working_directory;
1813 working_directory = expand_string(raw);
1814 if (working_directory == NULL)
1816 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
1817 "failed to expand for %s transport: %s", raw, tp->name,
1818 expand_string_message);
1821 if (*working_directory != '/')
1823 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
1824 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
1828 else working_directory = (deliver_home == NULL)? US"/" : deliver_home;
1830 /* If one of the return_output flags is set on the transport, create and open a
1831 file in the message log directory for the transport to write its output onto.
1832 This is mainly used by pipe transports. The file needs to be unique to the
1833 address. This feature is not available for shadow transports. */
1835 if (!shadowing && (tp->return_output || tp->return_fail_output ||
1836 tp->log_output || tp->log_fail_output))
1839 addr->return_filename =
1840 string_sprintf("%s/msglog/%s/%s-%d-%d", spool_directory, message_subdir,
1841 message_id, getpid(), return_count++);
1842 addr->return_file = open_msglog_file(addr->return_filename, 0400, &error);
1843 if (addr->return_file < 0)
1845 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
1846 "to return message: %s", error, tp->name, strerror(errno));
1851 /* Create the pipe for inter-process communication. */
1855 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
1860 /* Now fork the process to do the real work in the subprocess, but first
1861 ensure that all cached resources are freed so that the subprocess starts with
1862 a clean slate and doesn't interfere with the parent process. */
1866 if ((pid = fork()) == 0)
1868 BOOL replicate = TRUE;
1870 /* Prevent core dumps, as we don't want them in users' home directories.
1871 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
1872 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
1873 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
1874 complain if the error is "not supported".
1876 There are two scenarios where changing the max limit has an effect. In one,
1877 the user is using a .forward and invoking a command of their choice via pipe;
1878 for these, we do need the max limit to be 0 unless the admin chooses to
1879 permit an increased limit. In the other, the command is invoked directly by
1880 the transport and is under administrator control, thus being able to raise
1881 the limit aids in debugging. So there's no general always-right answer.
1883 Thus we inhibit core-dumps completely but let individual transports, while
1884 still root, re-raise the limits back up to aid debugging. We make the
1885 default be no core-dumps -- few enough people can use core dumps in
1886 diagnosis that it's reasonable to make them something that has to be explicitly requested.
1893 if (setrlimit(RLIMIT_CORE, &rl) < 0)
1895 #ifdef SETRLIMIT_NOT_SUPPORTED
1896 if (errno != ENOSYS && errno != ENOTSUP)
1898 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
1903 /* Reset the random number generator, so different processes don't all
1904 have the same sequence. */
1908 /* If the transport has a setup entry, call this first, while still
1909 privileged. (Appendfile uses this to expand quota, for example, while
1910 able to read private files.) */
1912 if (addr->transport->setup != NULL)
1914 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
1918 addr->transport_return = DEFER;
1922 addr->transport_return = PANIC;
1927 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
1928 when the process becomes unprivileged, it won't be able to write to the
1929 process log. SIGHUP is ignored throughout exim, except when it is being
1932 signal(SIGINT, SIG_IGN);
1933 signal(SIGTERM, SIG_IGN);
1934 signal(SIGUSR1, SIG_IGN);
1936 /* Close the unwanted half of the pipe, and set close-on-exec for the other
1937 half - for transports that exec things (e.g. pipe). Then set the required
1940 (void)close(pfd[pipe_read]);
1941 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
1943 exim_setugid(uid, gid, use_initgroups,
1944 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
1945 addr->address, addr->transport->name));
1949 address_item *batched;
1950 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
1951 for (batched = addr->next; batched != NULL; batched = batched->next)
1952 debug_printf("additional batched address: %s\n", batched->address);
1955 /* Set an appropriate working directory. */
1957 if (Uchdir(working_directory) < 0)
1959 addr->transport_return = DEFER;
1960 addr->basic_errno = errno;
1961 addr->message = string_sprintf("failed to chdir to %s", working_directory);
1964 /* If successful, call the transport */
1969 set_process_info("delivering %s to %s using %s", message_id,
1970 addr->local_part, addr->transport->name);
1972 /* Setting this global in the subprocess means we need never clear it */
1973 transport_name = addr->transport->name;
1975 /* If a transport filter has been specified, set up its argument list.
1976 Any errors will get put into the address, and FALSE yielded. */
1978 if (addr->transport->filter_command != NULL)
1980 ok = transport_set_up_command(&transport_filter_argv,
1981 addr->transport->filter_command,
1982 TRUE, PANIC, addr, US"transport filter", NULL);
1983 transport_filter_timeout = addr->transport->filter_timeout;
1985 else transport_filter_argv = NULL;
1989 debug_print_string(addr->transport->debug_string);
1990 replicate = !(addr->transport->info->code)(addr->transport, addr);
1994 /* Pass the results back down the pipe. If necessary, first replicate the
1995 status in the top address to the others in the batch. The label is the
1996 subject of a goto when a call to the transport's setup function fails. We
1997 pass the pointer to the transport back in case it got changed as a result of
1998 file_format in appendfile. */
2002 if (replicate) replicate_status(addr);
2003 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2006 int local_part_length = Ustrlen(addr2->local_part);
2010 if( (ret = write(pfd[pipe_write], (void *)&(addr2->transport_return), sizeof(int))) != sizeof(int)
2011 || (ret = write(pfd[pipe_write], (void *)&transport_count, sizeof(transport_count))) != sizeof(transport_count)
2012 || (ret = write(pfd[pipe_write], (void *)&(addr2->flags), sizeof(addr2->flags))) != sizeof(addr2->flags)
2013 || (ret = write(pfd[pipe_write], (void *)&(addr2->basic_errno), sizeof(int))) != sizeof(int)
2014 || (ret = write(pfd[pipe_write], (void *)&(addr2->more_errno), sizeof(int))) != sizeof(int)
2015 || (ret = write(pfd[pipe_write], (void *)&(addr2->special_action), sizeof(int))) != sizeof(int)
2016 || (ret = write(pfd[pipe_write], (void *)&(addr2->transport),
2017 sizeof(transport_instance *))) != sizeof(transport_instance *)
2019 /* For a file delivery, pass back the local part, in case the original
2020 was only part of the final delivery path. This gives more complete
2023 || (testflag(addr2, af_file)
2024 && ( (ret = write(pfd[pipe_write], (void *)&local_part_length, sizeof(int))) != sizeof(int)
2025 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2029 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2030 ret == -1 ? strerror(errno) : "short write");
2032 /* Now any messages */
2034 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2036 int message_length = (s == NULL)? 0 : Ustrlen(s) + 1;
2037 if( (ret = write(pfd[pipe_write], (void *)&message_length, sizeof(int))) != sizeof(int)
2038 || (message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length)
2040 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2041 ret == -1 ? strerror(errno) : "short write");
2045 /* OK, this process is now done. Free any cached resources that it opened,
2046 and close the pipe we were writing down before exiting. */
2048 (void)close(pfd[pipe_write]);
2053 /* Back in the main process: panic if the fork did not succeed. This seems
2054 better than returning an error - if forking is failing it is probably best
2055 not to try other deliveries for this message. */
2058 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2061 /* Read the pipe to get the delivery status codes and error messages. Our copy
2062 of the writing end must be closed first, as otherwise read() won't return zero
2063 on an empty pipe. We check that a status exists for each address before
2064 overwriting the address structure. If data is missing, the default DEFER status
2065 will remain. Afterwards, close the reading end. */
2067 (void)close(pfd[pipe_write]);
2069 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2071 len = read(pfd[pipe_read], (void *)&status, sizeof(int));
2077 addr2->transport_return = status;
2078 len = read(pfd[pipe_read], (void *)&transport_count,
2079 sizeof(transport_count));
2080 len = read(pfd[pipe_read], (void *)&(addr2->flags), sizeof(addr2->flags));
2081 len = read(pfd[pipe_read], (void *)&(addr2->basic_errno), sizeof(int));
2082 len = read(pfd[pipe_read], (void *)&(addr2->more_errno), sizeof(int));
2083 len = read(pfd[pipe_read], (void *)&(addr2->special_action), sizeof(int));
2084 len = read(pfd[pipe_read], (void *)&(addr2->transport),
2085 sizeof(transport_instance *));
2087 if (testflag(addr2, af_file))
2089 int local_part_length;
2090 len = read(pfd[pipe_read], (void *)&local_part_length, sizeof(int));
2091 len = read(pfd[pipe_read], (void *)big_buffer, local_part_length);
2092 big_buffer[local_part_length] = 0;
2093 addr2->local_part = string_copy(big_buffer);
2096 for (i = 0, sptr = &(addr2->message); i < 2;
2097 i++, sptr = &(addr2->user_message))
2100 len = read(pfd[pipe_read], (void *)&message_length, sizeof(int));
2101 if (message_length > 0)
2103 len = read(pfd[pipe_read], (void *)big_buffer, message_length);
2104 if (len > 0) *sptr = string_copy(big_buffer);
2111 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2112 "from delivery subprocess", addr2->unique);
2117 (void)close(pfd[pipe_read]);
2119 /* Unless shadowing, write all successful addresses immediately to the journal
2120 file, to ensure they are recorded asap. For homonymic addresses, use the base
2121 address plus the transport name. Failure to write the journal is panic-worthy,
2122 but don't stop, as it may prove possible subsequently to update the spool file
2123 in order to record the delivery. */
2127 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2129 if (addr2->transport_return != OK) continue;
2131 if (testflag(addr2, af_homonym))
2132 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2134 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2136 /* In the test harness, wait just a bit to let the subprocess finish off
2137 any debug output etc first. */
2139 if (running_in_test_harness) millisleep(300);
2141 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2142 len = Ustrlen(big_buffer);
2143 if (write(journal_fd, big_buffer, len) != len)
2144 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2145 big_buffer, strerror(errno));
2148 /* Ensure the journal file is pushed out to disk. */
2150 if (EXIMfsync(journal_fd) < 0)
2151 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2155 /* Wait for the process to finish. If it terminates with a non-zero code,
2156 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2157 status values of all the addresses as they are. Take care to handle the case
2158 when the subprocess doesn't seem to exist. This has been seen on one system
2159 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2160 happens, wait() doesn't recognize the termination of child processes. Exim now
2161 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2163 while ((rc = wait(&status)) != pid)
2165 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2167 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2168 addr->transport->driver_name);
2174 if ((status & 0xffff) != 0)
2176 int msb = (status >> 8) & 255;
2177 int lsb = status & 255;
2178 int code = (msb == 0)? (lsb & 0x7f) : msb;
2179 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2180 addr->special_action = SPECIAL_FREEZE;
2181 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2182 "status 0x%04x: %s %d",
2183 addr->transport->driver_name,
2185 (msb == 0)? "terminated by signal" : "exit code",
2189 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2191 if (addr->special_action == SPECIAL_WARN &&
2192 addr->transport->warn_message != NULL)
2195 uschar *warn_message;
2197 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2199 warn_message = expand_string(addr->transport->warn_message);
2200 if (warn_message == NULL)
2201 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2202 "message for %s transport): %s", addr->transport->warn_message,
2203 addr->transport->name, expand_string_message);
2206 pid_t pid = child_open_exim(&fd);
2209 FILE *f = fdopen(fd, "wb");
2210 if (errors_reply_to != NULL &&
2211 !contains_header(US"Reply-To", warn_message))
2212 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2213 fprintf(f, "Auto-Submitted: auto-replied\n");
2214 if (!contains_header(US"From", warn_message)) moan_write_from(f);
2215 fprintf(f, "%s", CS warn_message);
2217 /* Close and wait for child process to complete, without a timeout. */
2220 (void)child_close(pid, 0);
2224 addr->special_action = SPECIAL_NONE;
2230 /*************************************************
2231 * Do local deliveries *
2232 *************************************************/
2234 /* This function processes the list of addresses in addr_local. True local
2235 deliveries are always done one address at a time. However, local deliveries can
2236 be batched up in some cases. Typically this is when writing batched SMTP output
2237 files for use by some external transport mechanism, or when running local
2238 deliveries over LMTP.
2245 do_local_deliveries(void)
2248 open_db *dbm_file = NULL;
2249 time_t now = time(NULL);
2251 /* Loop until we have exhausted the supply of local deliveries */
2253 while (addr_local != NULL)
2255 time_t delivery_start;
2257 address_item *addr2, *addr3, *nextaddr;
2258 int logflags = LOG_MAIN;
2259 int logchar = dont_deliver? '*' : '=';
2260 transport_instance *tp;
2262 /* Pick the first undelivered address off the chain */
2264 address_item *addr = addr_local;
2265 addr_local = addr->next;
2268 DEBUG(D_deliver|D_transport)
2269 debug_printf("--------> %s <--------\n", addr->address);
2271 /* An internal disaster if there is no transport. Should not occur! */
2273 if ((tp = addr->transport) == NULL)
2275 logflags |= LOG_PANIC;
2276 disable_logging = FALSE; /* Jic */
2278 (addr->router != NULL)?
2279 string_sprintf("No transport set by %s router", addr->router->name)
2281 string_sprintf("No transport set by system filter");
2282 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2286 /* Check that this base address hasn't previously been delivered to this
2287 transport. The check is necessary at this point to handle homonymic addresses
2288 correctly in cases where the pattern of redirection changes between delivery
2289 attempts. Non-homonymic previous delivery is detected earlier, at routing
2292 if (previously_transported(addr, FALSE)) continue;
2294 /* There are weird cases where logging is disabled */
2296 disable_logging = tp->disable_logging;
2298 /* Check for batched addresses and possible amalgamation. Skip all the work
2299 if either batch_max <= 1 or there aren't any other addresses for local
2302 if (tp->batch_max > 1 && addr_local != NULL)
2304 int batch_count = 1;
2305 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2306 BOOL uses_lp = (testflag(addr, af_pfr) &&
2307 (testflag(addr, af_file) || addr->local_part[0] == '|')) ||
2308 readconf_depends((driver_instance *)tp, US"local_part");
2309 uschar *batch_id = NULL;
2310 address_item **anchor = &addr_local;
2311 address_item *last = addr;
2314 /* Expand the batch_id string for comparison with other addresses.
2315 Expansion failure suppresses batching. */
2317 if (tp->batch_id != NULL)
2319 deliver_set_expansions(addr);
2320 batch_id = expand_string(tp->batch_id);
2321 deliver_set_expansions(NULL);
2322 if (batch_id == NULL)
2324 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2325 "in %s transport (%s): %s", tp->name, addr->address,
2326 expand_string_message);
2327 batch_count = tp->batch_max;
2331 /* Until we reach the batch_max limit, pick off addresses which have the
2332 same characteristics. These are:
2335 not previously delivered (see comment about 50 lines above)
2336 same local part if the transport's configuration contains $local_part
2337 or if this is a file or pipe delivery from a redirection
2338 same domain if the transport's configuration contains $domain
2340 same additional headers
2341 same headers to be removed
2342 same uid/gid for running the transport
2343 same first host if a host list is set
2346 while ((next = *anchor) != NULL && batch_count < tp->batch_max)
2349 tp == next->transport &&
2350 !previously_transported(next, TRUE) &&
2351 (addr->flags & (af_pfr|af_file)) == (next->flags & (af_pfr|af_file)) &&
2352 (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0) &&
2353 (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0) &&
2354 same_strings(next->p.errors_address, addr->p.errors_address) &&
2355 same_headers(next->p.extra_headers, addr->p.extra_headers) &&
2356 same_strings(next->p.remove_headers, addr->p.remove_headers) &&
2357 same_ugid(tp, addr, next) &&
2358 ((addr->host_list == NULL && next->host_list == NULL) ||
2359 (addr->host_list != NULL && next->host_list != NULL &&
2360 Ustrcmp(addr->host_list->name, next->host_list->name) == 0));
2362 /* If the transport has a batch_id setting, batch_id will be non-NULL
2363 from the expansion outside the loop. Expand for this address and compare.
2364 Expansion failure makes this address ineligible for batching. */
2366 if (ok && batch_id != NULL)
2369 address_item *save_nextnext = next->next;
2370 next->next = NULL; /* Expansion for a single address */
2371 deliver_set_expansions(next);
2372 next->next = save_nextnext;
2373 bid = expand_string(tp->batch_id);
2374 deliver_set_expansions(NULL);
2377 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2378 "in %s transport (%s): %s", tp->name, next->address,
2379 expand_string_message);
2382 else ok = (Ustrcmp(batch_id, bid) == 0);
2385 /* Take address into batch if OK. */
2389 *anchor = next->next; /* Include the address */
2395 else anchor = &(next->next); /* Skip the address */
2399 /* We now have one or more addresses that can be delivered in a batch. Check
2400 whether the transport is prepared to accept a message of this size. If not,
2401 fail them all forthwith. If the expansion fails, or does not yield an
2402 integer, defer delivery. */
2404 if (tp->message_size_limit != NULL)
2406 int rc = check_message_size(tp, addr);
2409 replicate_status(addr);
2410 while (addr != NULL)
2413 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2416 continue; /* With next batch of addresses */
2420 /* If we are not running the queue, or if forcing, all deliveries will be
2421 attempted. Otherwise, we must respect the retry times for each address. Even
2422 when not doing this, we need to set up the retry key string, and determine
2423 whether a retry record exists, because after a successful delivery, a delete
2424 retry item must be set up. Keep the retry database open only for the duration
2425 of these checks, rather than for all local deliveries, because some local
2426 deliveries (e.g. to pipes) can take a substantial time. */
2428 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
2429 if (dbm_file == NULL)
2431 DEBUG(D_deliver|D_retry|D_hints_lookup)
2432 debug_printf("no retry data available\n");
2437 while (addr2 != NULL)
2439 BOOL ok = TRUE; /* to deliver this address */
2442 /* Set up the retry key to include the domain or not, and change its
2443 leading character from "R" to "T". Must make a copy before doing this,
2444 because the old key may be pointed to from a "delete" retry item after
2447 retry_key = string_copy(
2448 (tp->retry_use_local_part)? addr2->address_retry_key :
2449 addr2->domain_retry_key);
2452 /* Inspect the retry data. If there is no hints file, delivery happens. */
2454 if (dbm_file != NULL)
2456 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2458 /* If there is no retry record, delivery happens. If there is,
2459 remember it exists so it can be deleted after a successful delivery. */
2461 if (retry_record != NULL)
2463 setflag(addr2, af_lt_retry_exists);
2465 /* A retry record exists for this address. If queue running and not
2466 forcing, inspect its contents. If the record is too old, or if its
2467 retry time has come, or if it has passed its cutoff time, delivery
2472 debug_printf("retry record exists: age=%s ",
2473 readconf_printtime(now - retry_record->time_stamp));
2474 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2475 debug_printf(" time to retry = %s expired = %d\n",
2476 readconf_printtime(retry_record->next_try - now),
2477 retry_record->expired);
2480 if (queue_running && !deliver_force)
2482 ok = (now - retry_record->time_stamp > retry_data_expire) ||
2483 (now >= retry_record->next_try) ||
2484 retry_record->expired;
2486 /* If we haven't reached the retry time, there is one more check
2487 to do, which is for the ultimate address timeout. */
2490 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2494 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2497 /* This address is to be delivered. Leave it on the chain. */
2502 addr2 = addr2->next;
2505 /* This address is to be deferred. Take it out of the chain, and
2506 post-process it as complete. Must take it out of the chain first,
2507 because post processing puts it on another chain. */
2511 address_item *this = addr2;
2512 this->message = US"Retry time not yet reached";
2513 this->basic_errno = ERRNO_LRETRY;
2514 if (addr3 == NULL) addr2 = addr = addr2->next;
2515 else addr2 = addr3->next = addr2->next;
2516 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2520 if (dbm_file != NULL) dbfn_close(dbm_file);
2522 /* If there are no addresses left on the chain, they all deferred. Loop
2523 for the next set of addresses. */
2525 if (addr == NULL) continue;
2527 /* So, finally, we do have some addresses that can be passed to the
2528 transport. Before doing so, set up variables that are relevant to a
2531 deliver_set_expansions(addr);
2532 delivery_start = time(NULL);
2533 deliver_local(addr, FALSE);
2534 deliver_time = (int)(time(NULL) - delivery_start);
2536 /* If a shadow transport (which must perforce be another local transport), is
2537 defined, and its condition is met, we must pass the message to the shadow
2538 too, but only those addresses that succeeded. We do this by making a new
2539 chain of addresses - also to keep the original chain uncontaminated. We must
2540 use a chain rather than doing it one by one, because the shadow transport may
2543 NOTE: if the condition fails because of a lookup defer, there is nothing we
2546 if (tp->shadow != NULL &&
2547 (tp->shadow_condition == NULL ||
2548 expand_check_condition(tp->shadow_condition, tp->name, US"transport")))
2550 transport_instance *stp;
2551 address_item *shadow_addr = NULL;
2552 address_item **last = &shadow_addr;
2554 for (stp = transports; stp != NULL; stp = stp->next)
2555 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
2558 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
2561 /* Pick off the addresses that have succeeded, and make clones. Put into
2562 the shadow_message field a pointer to the shadow_message field of the real
2565 else for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2567 if (addr2->transport_return != OK) continue;
2568 addr3 = store_get(sizeof(address_item));
2571 addr3->shadow_message = (uschar *)(&(addr2->shadow_message));
2572 addr3->transport = stp;
2573 addr3->transport_return = DEFER;
2574 addr3->return_filename = NULL;
2575 addr3->return_file = -1;
2577 last = &(addr3->next);
2580 /* If we found any addresses to shadow, run the delivery, and stick any
2581 message back into the shadow_message field in the original. */
2583 if (shadow_addr != NULL)
2585 int save_count = transport_count;
2587 DEBUG(D_deliver|D_transport)
2588 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2589 deliver_local(shadow_addr, TRUE);
2591 for(; shadow_addr != NULL; shadow_addr = shadow_addr->next)
2593 int sresult = shadow_addr->transport_return;
2594 *((uschar **)(shadow_addr->shadow_message)) = (sresult == OK)?
2595 string_sprintf(" ST=%s", stp->name) :
2596 string_sprintf(" ST=%s (%s%s%s)", stp->name,
2597 (shadow_addr->basic_errno <= 0)?
2598 US"" : US strerror(shadow_addr->basic_errno),
2599 (shadow_addr->basic_errno <= 0 || shadow_addr->message == NULL)?
2601 (shadow_addr->message != NULL)? shadow_addr->message :
2602 (shadow_addr->basic_errno <= 0)? US"unknown error" : US"");
2604 DEBUG(D_deliver|D_transport)
2605 debug_printf("%s shadow transport returned %s for %s\n",
2607 (sresult == OK)? "OK" :
2608 (sresult == DEFER)? "DEFER" :
2609 (sresult == FAIL)? "FAIL" :
2610 (sresult == PANIC)? "PANIC" : "?",
2611 shadow_addr->address);
2614 DEBUG(D_deliver|D_transport)
2615 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2617 transport_count = save_count; /* Restore original transport count */
2621 /* Cancel the expansions that were set up for the delivery. */
2623 deliver_set_expansions(NULL);
2625 /* Now we can process the results of the real transport. We must take each
2626 address off the chain first, because post_process_one() puts it on another
2629 for (addr2 = addr; addr2 != NULL; addr2 = nextaddr)
2631 int result = addr2->transport_return;
2632 nextaddr = addr2->next;
2634 DEBUG(D_deliver|D_transport)
2635 debug_printf("%s transport returned %s for %s\n",
2637 (result == OK)? "OK" :
2638 (result == DEFER)? "DEFER" :
2639 (result == FAIL)? "FAIL" :
2640 (result == PANIC)? "PANIC" : "?",
2643 /* If there is a retry_record, or if delivery is deferred, build a retry
2644 item for setting a new retry time or deleting the old retry record from
2645 the database. These items are handled all together after all addresses
2646 have been handled (so the database is open just for a short time for
2649 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
2651 int flags = (result == DEFER)? 0 : rf_delete;
2652 uschar *retry_key = string_copy((tp->retry_use_local_part)?
2653 addr2->address_retry_key : addr2->domain_retry_key);
2655 retry_add_item(addr2, retry_key, flags);
2658 /* Done with this address */
2660 if (result == OK) addr2->more_errno = deliver_time;
2661 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
2663 /* If a pipe delivery generated text to be sent back, the result may be
2664 changed to FAIL, and we must copy this for subsequent addresses in the
2667 if (addr2->transport_return != result)
2669 for (addr3 = nextaddr; addr3 != NULL; addr3 = addr3->next)
2671 addr3->transport_return = addr2->transport_return;
2672 addr3->basic_errno = addr2->basic_errno;
2673 addr3->message = addr2->message;
2675 result = addr2->transport_return;
2678 /* Whether or not the result was changed to FAIL, we need to copy the
2679 return_file value from the first address into all the addresses of the
2680 batch, so they are all listed in the error message. */
2682 addr2->return_file = addr->return_file;
2684 /* Change log character for recording successful deliveries. */
2686 if (result == OK) logchar = '-';
2688 } /* Loop back for next batch of addresses */
2694 /*************************************************
2695 * Sort remote deliveries *
2696 *************************************************/
2698 /* This function is called if remote_sort_domains is set. It arranges that the
2699 chain of addresses for remote deliveries is ordered according to the strings
2700 specified. Try to make this shuffling reasonably efficient by handling
2701 sequences of addresses rather than just single ones.
2708 sort_remote_deliveries(void)
2711 address_item **aptr = &addr_remote;
2712 uschar *listptr = remote_sort_domains;
2716 while (*aptr != NULL &&
2717 (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
2720 address_item *moved = NULL;
2721 address_item **bptr = &moved;
2723 while (*aptr != NULL)
2725 address_item **next;
2726 deliver_domain = (*aptr)->domain; /* set $domain */
2727 if (match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1,
2728 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
2730 aptr = &((*aptr)->next);
2734 next = &((*aptr)->next);
2735 while (*next != NULL &&
2736 (deliver_domain = (*next)->domain, /* Set $domain */
2737 match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1,
2738 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK)
2739 next = &((*next)->next);
2741 /* If the batch of non-matchers is at the end, add on any that were
2742 extracted further up the chain, and end this iteration. Otherwise,
2743 extract them from the chain and hang on the moved chain. */
2755 aptr = &((*aptr)->next);
2758 /* If the loop ended because the final address matched, *aptr will
2759 be NULL. Add on to the end any extracted non-matching addresses. If
2760 *aptr is not NULL, the loop ended via "break" when *next is null, that
2761 is, there was a string of non-matching addresses at the end. In this
2762 case the extracted addresses have already been added on the end. */
2764 if (*aptr == NULL) *aptr = moved;
2770 debug_printf("remote addresses after sorting:\n");
2771 for (addr = addr_remote; addr != NULL; addr = addr->next)
2772 debug_printf(" %s\n", addr->address);
2778 /*************************************************
2779 * Read from pipe for remote delivery subprocess *
2780 *************************************************/
2782 /* This function is called when the subprocess is complete, but can also be
2783 called before it is complete, in order to empty a pipe that is full (to prevent
2784 deadlock). It must therefore keep track of its progress in the parlist data
2787 We read the pipe to get the delivery status codes and a possible error message
2788 for each address, optionally preceded by unusability data for the hosts and
2789 also by optional retry data.
2791 Read in large chunks into the big buffer and then scan through, interpreting
2792 the data therein. In most cases, only a single read will be necessary. No
2793 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
2794 that we read the next chunk when there is less than 2500 bytes left in the
2795 non-final chunk, we can assume each item is complete in the buffer before
2796 handling it. Each item is written using a single write(), which is atomic for
2797 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
2798 often bigger) so even if we are reading while the subprocess is still going, we
2799 should never have only a partial item in the buffer.
2802 poffset the offset of the parlist item
2803 eop TRUE if the process has completed
2805 Returns: TRUE if the terminating 'Z' item has been read,
2806 or there has been a disaster (i.e. no more data needed);
2811 par_read_pipe(int poffset, BOOL eop)
2814 pardata *p = parlist + poffset;
2815 address_item *addrlist = p->addrlist;
2816 address_item *addr = p->addr;
2819 uschar *endptr = big_buffer;
2820 uschar *ptr = endptr;
2821 uschar *msg = p->msg;
2822 BOOL done = p->done;
2823 BOOL unfinished = TRUE;
2825 /* Loop through all items, reading from the pipe when necessary. The pipe
2826 is set up to be non-blocking, but there are two different Unix mechanisms in
2827 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
2828 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
2829 which returns 0 for both end of file and no more data. We distinguish the
2830 two cases by taking 0 as end of file only when we know the process has
2833 Each separate item is written to the pipe in a single write(), and as they are
2834 all short items, the writes will all be atomic and we should never find
2835 ourselves in the position of having read an incomplete item. "Short" in this
2836 case can mean up to about 1K in the case when there is a long error message
2837 associated with an address. */
2839 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
2840 (int)p->pid, eop? "ended" : "not ended");
2844 retry_item *r, **rp;
2845 int remaining = endptr - ptr;
2847 /* Read (first time) or top up the chars in the buffer if necessary.
2848 There will be only one read if we get all the available data (i.e. don't
2849 fill the buffer completely). */
2851 if (remaining < 2500 && unfinished)
2854 int available = big_buffer_size - remaining;
2856 if (remaining > 0) memmove(big_buffer, ptr, remaining);
2859 endptr = big_buffer + remaining;
2860 len = read(fd, endptr, available);
2862 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
2864 /* If the result is EAGAIN and the process is not complete, just
2865 stop reading any more and process what we have already. */
2869 if (!eop && errno == EAGAIN) len = 0; else
2871 msg = string_sprintf("failed to read pipe from transport process "
2872 "%d for transport %s: %s", pid, addr->transport->driver_name,
2878 /* If the length is zero (eof or no-more-data), just process what we
2879 already have. Note that if the process is still running and we have
2880 read all the data in the pipe (but less that "available") then we
2881 won't read any more, as "unfinished" will get set FALSE. */
2884 unfinished = len == available;
2887 /* If we are at the end of the available data, exit the loop. */
2889 if (ptr >= endptr) break;
2891 /* Handle each possible type of item, assuming the complete item is
2892 available in store. */
2896 /* Host items exist only if any hosts were marked unusable. Match
2897 up by checking the IP address. */
2900 for (h = addrlist->host_list; h != NULL; h = h->next)
2902 if (h->address == NULL || Ustrcmp(h->address, ptr+2) != 0) continue;
2910 /* Retry items are sent in a preceding R item for each address. This is
2911 kept separate to keep each message short enough to guarantee it won't
2912 be split in the pipe. Hopefully, in the majority of cases, there won't in
2913 fact be any retry items at all.
2915 The complete set of retry items might include an item to delete a
2916 routing retry if there was a previous routing delay. However, routing
2917 retries are also used when a remote transport identifies an address error.
2918 In that case, there may also be an "add" item for the same key. Arrange
2919 that a "delete" item is dropped in favour of an "add" item. */
2922 if (addr == NULL) goto ADDR_MISMATCH;
2924 DEBUG(D_deliver|D_retry)
2925 debug_printf("reading retry information for %s from subprocess\n",
2928 /* Cut out any "delete" items on the list. */
2930 for (rp = &(addr->retries); (r = *rp) != NULL; rp = &(r->next))
2932 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
2934 if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */
2935 *rp = r->next; /* Excise a delete item */
2936 DEBUG(D_deliver|D_retry)
2937 debug_printf(" existing delete item dropped\n");
2941 /* We want to add a delete item only if there is no non-delete item;
2942 however we still have to step ptr through the data. */
2944 if (r == NULL || (*ptr & rf_delete) == 0)
2946 r = store_get(sizeof(retry_item));
2947 r->next = addr->retries;
2950 r->key = string_copy(ptr);
2952 memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno));
2953 ptr += sizeof(r->basic_errno);
2954 memcpy(&(r->more_errno), ptr, sizeof(r->more_errno));
2955 ptr += sizeof(r->more_errno);
2956 r->message = (*ptr)? string_copy(ptr) : NULL;
2957 DEBUG(D_deliver|D_retry)
2958 debug_printf(" added %s item\n",
2959 ((r->flags & rf_delete) == 0)? "retry" : "delete");
2964 DEBUG(D_deliver|D_retry)
2965 debug_printf(" delete item not added: non-delete item exists\n");
2968 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
2974 /* Put the amount of data written into the parlist block */
2977 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
2978 ptr += sizeof(transport_count);
2981 /* Address items are in the order of items on the address chain. We
2982 remember the current address value in case this function is called
2983 several times to empty the pipe in stages. Information about delivery
2984 over TLS is sent in a preceding X item for each address. We don't put
2985 it in with the other info, in order to keep each message short enough to
2986 guarantee it won't be split in the pipe. */
2990 if (addr == NULL) goto ADDR_MISMATCH; /* Below, in 'A' handler */
2994 addr->cipher = NULL;
2995 addr->peerdn = NULL;
2998 addr->cipher = string_copy(ptr);
3001 addr->peerdn = string_copy(ptr);
3005 addr->peercert = NULL;
3007 (void) tls_import_cert(ptr, &addr->peercert);
3011 addr->ourcert = NULL;
3013 (void) tls_import_cert(ptr, &addr->ourcert);
3016 #ifdef EXPERIMENTAL_OCSP
3018 addr->ocsp = OCSP_NOT_REQ;
3020 addr->ocsp = *ptr - '0';
3028 case 'C': /* client authenticator information */
3032 addr->authenticator = (*ptr)? string_copy(ptr) : NULL;
3035 addr->auth_id = (*ptr)? string_copy(ptr) : NULL;
3038 addr->auth_sndr = (*ptr)? string_copy(ptr) : NULL;
3044 #ifdef EXPERIMENTAL_PRDR
3046 addr->flags |= af_prdr_used; break;
3053 msg = string_sprintf("address count mismatch for data read from pipe "
3054 "for transport process %d for transport %s", pid,
3055 addrlist->transport->driver_name);
3060 addr->transport_return = *ptr++;
3061 addr->special_action = *ptr++;
3062 memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno));
3063 ptr += sizeof(addr->basic_errno);
3064 memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno));
3065 ptr += sizeof(addr->more_errno);
3066 memcpy(&(addr->flags), ptr, sizeof(addr->flags));
3067 ptr += sizeof(addr->flags);
3068 addr->message = (*ptr)? string_copy(ptr) : NULL;
3070 addr->user_message = (*ptr)? string_copy(ptr) : NULL;
3073 /* Always two strings for host information, followed by the port number */
3077 h = store_get(sizeof(host_item));
3078 h->name = string_copy(ptr);
3080 h->address = string_copy(ptr);
3082 memcpy(&(h->port), ptr, sizeof(h->port));
3083 ptr += sizeof(h->port);
3084 addr->host_used = h;
3088 /* Finished with this address */
3093 /* Z marks the logical end of the data. It is followed by '0' if
3094 continue_transport was NULL at the end of transporting, otherwise '1'.
3095 We need to know when it becomes NULL during a delivery down a passed SMTP
3096 channel so that we don't try to pass anything more down it. Of course, for
3097 most normal messages it will remain NULL all the time. */
3102 continue_transport = NULL;
3103 continue_hostname = NULL;
3106 DEBUG(D_deliver) debug_printf("Z%c item read\n", *ptr);
3109 /* Anything else is a disaster. */
3112 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3113 "process %d for transport %s", ptr[-1], pid,
3114 addr->transport->driver_name);
3120 /* The done flag is inspected externally, to determine whether or not to
3121 call the function again when the process finishes. */
3125 /* If the process hadn't finished, and we haven't seen the end of the data
3126 or suffered a disaster, update the rest of the state, and return FALSE to
3127 indicate "not finished". */
3136 /* Close our end of the pipe, to prevent deadlock if the far end is still
3137 pushing stuff into it. */
3142 /* If we have finished without error, but haven't had data for every address,
3143 something is wrong. */
3145 if (msg == NULL && addr != NULL)
3146 msg = string_sprintf("insufficient address data read from pipe "
3147 "for transport process %d for transport %s", pid,
3148 addr->transport->driver_name);
3150 /* If an error message is set, something has gone wrong in getting back
3151 the delivery data. Put the message into each address and freeze it. */
3155 for (addr = addrlist; addr != NULL; addr = addr->next)
3157 addr->transport_return = DEFER;
3158 addr->special_action = SPECIAL_FREEZE;
3159 addr->message = msg;
3163 /* Return TRUE to indicate we have got all we need from this process, even
3164 if it hasn't actually finished yet. */
3171 /*************************************************
3172 * Post-process a set of remote addresses *
3173 *************************************************/
3175 /* Do what has to be done immediately after a remote delivery for each set of
3176 addresses, then re-write the spool if necessary. Note that post_process_one
3177 puts the address on an appropriate queue; hence we must fish off the next
3178 one first. This function is also called if there is a problem with setting
3179 up a subprocess to do a remote delivery in parallel. In this case, the final
3180 argument contains a message, and the action must be forced to DEFER.
3183 addr pointer to chain of address items
3184 logflags flags for logging
3185 msg NULL for normal cases; -> error message for unexpected problems
3186 fallback TRUE if processing fallback hosts
3192 remote_post_process(address_item *addr, int logflags, uschar *msg,
3197 /* If any host addresses were found to be unusable, add them to the unusable
3198 tree so that subsequent deliveries don't try them. */
3200 for (h = addr->host_list; h != NULL; h = h->next)
3202 if (h->address == NULL) continue;
3203 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3206 /* Now handle each address on the chain. The transport has placed '=' or '-'
3207 into the special_action field for each successful delivery. */
3209 while (addr != NULL)
3211 address_item *next = addr->next;
3213 /* If msg == NULL (normal processing) and the result is DEFER and we are
3214 processing the main hosts and there are fallback hosts available, put the
3215 address on the list for fallback delivery. */
3217 if (addr->transport_return == DEFER &&
3218 addr->fallback_hosts != NULL &&
3222 addr->host_list = addr->fallback_hosts;
3223 addr->next = addr_fallback;
3224 addr_fallback = addr;
3225 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3228 /* If msg is set (=> unexpected problem), set it in the address before
3229 doing the ordinary post processing. */
3235 addr->message = msg;
3236 addr->transport_return = DEFER;
3238 (void)post_process_one(addr, addr->transport_return, logflags,
3239 DTYPE_TRANSPORT, addr->special_action);
3247 /* If we have just delivered down a passed SMTP channel, and that was
3248 the last address, the channel will have been closed down. Now that
3249 we have logged that delivery, set continue_sequence to 1 so that
3250 any subsequent deliveries don't get "*" incorrectly logged. */
3252 if (continue_transport == NULL) continue_sequence = 1;
3257 /*************************************************
3258 * Wait for one remote delivery subprocess *
3259 *************************************************/
3261 /* This function is called while doing remote deliveries when either the
3262 maximum number of processes exist and we need one to complete so that another
3263 can be created, or when waiting for the last ones to complete. It must wait for
3264 the completion of one subprocess, empty the control block slot, and return a
3265 pointer to the address chain.
3268 Returns: pointer to the chain of addresses handled by the process;
3269 NULL if no subprocess found - this is an unexpected error
3272 static address_item *
3275 int poffset, status;
3276 address_item *addr, *addrlist;
3279 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3280 "to finish", message_id);
3282 /* Loop until either a subprocess completes, or there are no subprocesses in
3283 existence - in which case give an error return. We cannot proceed just by
3284 waiting for a completion, because a subprocess may have filled up its pipe, and
3285 be waiting for it to be emptied. Therefore, if no processes have finished, we
3286 wait for one of the pipes to acquire some data by calling select(), with a
3287 timeout just in case.
3289 The simple approach is just to iterate after reading data from a ready pipe.
3290 This leads to non-ideal behaviour when the subprocess has written its final Z
3291 item, closed the pipe, and is in the process of exiting (the common case). A
3292 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3293 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3296 To avoid this, if all the data that is needed has been read from a subprocess
3297 after select(), an explicit wait() for it is done. We know that all it is doing
3298 is writing to the pipe and then exiting, so the wait should not be long.
3300 The non-blocking waitpid() is to some extent just insurance; if we could
3301 reliably detect end-of-file on the pipe, we could always know when to do a
3302 blocking wait() for a completed process. However, because some systems use
3303 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3304 use code that functions without the need to recognize EOF.
3306 There's a double loop here just in case we end up with a process that is not in
3307 the list of remote delivery processes. Something has obviously gone wrong if
3308 this is the case. (For example, a process that is incorrectly left over from
3309 routing or local deliveries might be found.) The damage can be minimized by
3310 looping back and looking for another process. If there aren't any, the error
3311 return will happen. */
3313 for (;;) /* Normally we do not repeat this loop */
3315 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3318 fd_set select_pipes;
3319 int maxpipe, readycount;
3321 /* A return value of -1 can mean several things. If errno != ECHILD, it
3322 either means invalid options (which we discount), or that this process was
3323 interrupted by a signal. Just loop to try the waitpid() again.
3325 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3326 in existence. This should never happen, and is an unexpected error.
3327 However, there is a nasty complication when running under Linux. If "strace
3328 -f" is being used under Linux to trace this process and its children,
3329 subprocesses are "stolen" from their parents and become the children of the
3330 tracing process. A general wait such as the one we've just obeyed returns
3331 as if there are no children while subprocesses are running. Once a
3332 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3333 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3336 This does not happen using "truss" on Solaris, nor (I think) with other
3337 tracing facilities on other OS. It seems to be specific to Linux.
3339 What we do to get round this is to use kill() to see if any of our
3340 subprocesses are still in existence. If kill() gives an OK return, we know
3341 it must be for one of our processes - it can't be for a re-use of the pid,
3342 because if our process had finished, waitpid() would have found it. If any
3343 of our subprocesses are in existence, we proceed to use select() as if
3344 waitpid() had returned zero. I think this is safe. */
3348 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3351 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3352 "for process existence\n");
3354 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3356 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3358 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3359 "stolen by strace\n", (int)pid);
3360 break; /* With poffset set */
3364 if (poffset >= remote_max_parallel)
3366 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3367 return NULL; /* This is the error return */
3371 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3372 been handled above. A return value of zero means that there is at least one
3373 subprocess, but there are no completed subprocesses. See if any pipes are
3374 ready with any data for reading. */
3376 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3379 FD_ZERO(&select_pipes);
3380 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3382 if (parlist[poffset].pid != 0)
3384 int fd = parlist[poffset].fd;
3385 FD_SET(fd, &select_pipes);
3386 if (fd > maxpipe) maxpipe = fd;
3390 /* Stick in a 60-second timeout, just in case. */
3395 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3398 /* Scan through the pipes and read any that are ready; use the count
3399 returned by select() to stop when there are no more. Select() can return
3400 with no processes (e.g. if interrupted). This shouldn't matter.
3402 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3403 read, or there was a disaster. In either case, we are finished with this
3404 process. Do an explicit wait() for the process and break the main loop if
3407 It turns out that we have to deal with the case of an interrupted system
3408 call, which can happen on some operating systems if the signal handling is
3409 set up to do that by default. */
3412 readycount > 0 && poffset < remote_max_parallel;
3415 if ((pid = parlist[poffset].pid) != 0 &&
3416 FD_ISSET(parlist[poffset].fd, &select_pipes))
3419 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3421 for (;;) /* Loop for signals */
3423 pid_t endedpid = waitpid(pid, &status, 0);
3424 if (endedpid == pid) goto PROCESS_DONE;
3425 if (endedpid != (pid_t)(-1) || errno != EINTR)
3426 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3427 "%d (errno = %d) from waitpid() for process %d",
3428 (int)endedpid, errno, (int)pid);
3434 /* Now go back and look for a completed subprocess again. */
3437 /* A completed process was detected by the non-blocking waitpid(). Find the
3438 data block that corresponds to this subprocess. */
3440 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3441 if (pid == parlist[poffset].pid) break;
3443 /* Found the data block; this is a known remote delivery process. We don't
3444 need to repeat the outer loop. This should be what normally happens. */
3446 if (poffset < remote_max_parallel) break;
3448 /* This situation is an error, but it's probably better to carry on looking
3449 for another process than to give up (as we used to do). */
3451 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
3452 "transport process list", pid);
3453 } /* End of the "for" loop */
3455 /* Come here when all the data was completely read after a select(), and
3456 the process in pid has been wait()ed for. */
3463 debug_printf("remote delivery process %d ended\n", (int)pid);
3465 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
3469 set_process_info("delivering %s", message_id);
3471 /* Get the chain of processed addresses */
3473 addrlist = parlist[poffset].addrlist;
3475 /* If the process did not finish cleanly, record an error and freeze (except
3476 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3477 in case the delivery did actually happen. */
3479 if ((status & 0xffff) != 0)
3482 int msb = (status >> 8) & 255;
3483 int lsb = status & 255;
3484 int code = (msb == 0)? (lsb & 0x7f) : msb;
3486 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
3488 addrlist->transport->driver_name,
3490 (msb == 0)? "terminated by signal" : "exit code",
3493 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
3494 addrlist->special_action = SPECIAL_FREEZE;
3496 for (addr = addrlist; addr != NULL; addr = addr->next)
3498 addr->transport_return = DEFER;
3499 addr->message = msg;
3502 remove_journal = FALSE;
3505 /* Else complete reading the pipe to get the result of the delivery, if all
3506 the data has not yet been obtained. */
3508 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
3510 /* Put the data count and return path into globals, mark the data slot unused,
3511 decrement the count of subprocesses, and return the address chain. */
3513 transport_count = parlist[poffset].transport_count;
3514 used_return_path = parlist[poffset].return_path;
3515 parlist[poffset].pid = 0;
3522 /*************************************************
3523 * Wait for subprocesses and post-process *
3524 *************************************************/
3526 /* This function waits for subprocesses until the number that are still running
3527 is below a given threshold. For each complete subprocess, the addresses are
3528 post-processed. If we can't find a running process, there is some shambles.
3529 Better not bomb out, as that might lead to multiple copies of the message. Just
3530 log and proceed as if all done.
3533 max maximum number of subprocesses to leave running
3534 fallback TRUE if processing fallback hosts
3540 par_reduce(int max, BOOL fallback)
3542 while (parcount > max)
3544 address_item *doneaddr = par_wait();
3545 if (doneaddr == NULL)
3547 log_write(0, LOG_MAIN|LOG_PANIC,
3548 "remote delivery process count got out of step");
3551 else remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
3559 rmt_dlv_checked_write(int fd, void * buf, int size)
3561 int ret = write(fd, buf, size);
3563 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed writing transport result to pipe: %s\n",
3564 ret == -1 ? strerror(errno) : "short write");
3567 /*************************************************
3568 * Do remote deliveries *
3569 *************************************************/
3571 /* This function is called to process the addresses in addr_remote. We must
3572 pick off the queue all addresses that have the same transport, remote
3573 destination, and errors address, and hand them to the transport in one go,
3574 subject to some configured limitations. If this is a run to continue delivering
3575 to an existing delivery channel, skip all but those addresses that can go to
3576 that channel. The skipped addresses just get deferred.
3578 If mua_wrapper is set, all addresses must be able to be sent in a single
3579 transaction. If not, this function yields FALSE.
3581 In Exim 4, remote deliveries are always done in separate processes, even
3582 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
3583 is so that the base process can retain privilege. This makes the
3584 implementation of fallback transports feasible (though not initially done.)
3586 We create up to the configured number of subprocesses, each of which passes
3587 back the delivery state via a pipe. (However, when sending down an existing
3588 connection, remote_max_parallel is forced to 1.)
3591 fallback TRUE if processing fallback hosts
3593 Returns: TRUE normally
3594 FALSE if mua_wrapper is set and the addresses cannot all be sent
3599 do_remote_deliveries(BOOL fallback)
3605 parcount = 0; /* Number of executing subprocesses */
3607 /* When sending down an existing channel, only do one delivery at a time.
3608 We use a local variable (parmax) to hold the maximum number of processes;
3609 this gets reduced from remote_max_parallel if we can't create enough pipes. */
3611 if (continue_transport != NULL) remote_max_parallel = 1;
3612 parmax = remote_max_parallel;
3614 /* If the data for keeping a list of processes hasn't yet been
3617 if (parlist == NULL)
3619 parlist = store_get(remote_max_parallel * sizeof(pardata));
3620 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3621 parlist[poffset].pid = 0;
3624 /* Now loop for each remote delivery */
3626 for (delivery_count = 0; addr_remote != NULL; delivery_count++)
3632 int address_count = 1;
3633 int address_count_max;
3635 BOOL use_initgroups;
3636 BOOL pipe_done = FALSE;
3637 transport_instance *tp;
3638 address_item **anchor = &addr_remote;
3639 address_item *addr = addr_remote;
3640 address_item *last = addr;
3643 /* Pull the first address right off the list. */
3645 addr_remote = addr->next;
3648 DEBUG(D_deliver|D_transport)
3649 debug_printf("--------> %s <--------\n", addr->address);
3651 /* If no transport has been set, there has been a big screw-up somewhere. */
3653 if ((tp = addr->transport) == NULL)
3655 disable_logging = FALSE; /* Jic */
3656 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3657 US"No transport set by router", fallback);
3661 /* Check that this base address hasn't previously been delivered to this
3662 transport. The check is necessary at this point to handle homonymic addresses
3663 correctly in cases where the pattern of redirection changes between delivery
3664 attempts. Non-homonymic previous delivery is detected earlier, at routing
3667 if (previously_transported(addr, FALSE)) continue;
3669 /* Force failure if the message is too big. */
3671 if (tp->message_size_limit != NULL)
3673 int rc = check_message_size(tp, addr);
3676 addr->transport_return = rc;
3677 remote_post_process(addr, LOG_MAIN, NULL, fallback);
3682 /* Get the flag which specifies whether the transport can handle different
3683 domains that nevertheless resolve to the same set of hosts. */
3685 multi_domain = tp->multi_domain;
3687 /* Get the maximum it can handle in one envelope, with zero meaning
3688 unlimited, which is forced for the MUA wrapper case. */
3690 address_count_max = tp->max_addresses;
3691 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
3694 /************************************************************************/
3695 /***** This is slightly experimental code, but should be safe. *****/
3697 /* The address_count_max value is the maximum number of addresses that the
3698 transport can send in one envelope. However, the transport must be capable of
3699 dealing with any number of addresses. If the number it gets exceeds its
3700 envelope limitation, it must send multiple copies of the message. This can be
3701 done over a single connection for SMTP, so uses less resources than making
3702 multiple connections. On the other hand, if remote_max_parallel is greater
3703 than one, it is perhaps a good idea to use parallel processing to move the
3704 message faster, even if that results in multiple simultaneous connections to
3707 How can we come to some compromise between these two ideals? What we do is to
3708 limit the number of addresses passed to a single instance of a transport to
3709 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
3710 number of addresses routed to remote transports divided by
3711 remote_max_parallel. For example, if the message has 100 remote recipients,
3712 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
3713 once. But if rcpt_max is 100, we could send up to 100.
3715 Of course, not all the remotely addresses in a message are going to go to the
3716 same set of hosts (except in smarthost configurations), so this is just a
3717 heuristic way of dividing up the work.
3719 Furthermore (1), because this may not be wanted in some cases, and also to
3720 cope with really pathological cases, there is also a limit to the number of
3721 messages that are sent over one connection. This is the same limit that is
3722 used when sending several different messages over the same connection.
3723 Continue_sequence is set when in this situation, to the number sent so
3724 far, including this message.
3726 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
3727 is probably because they are using VERP, in which case they want to pass only
3728 one address at a time to the transport, in order to be able to use
3729 $local_part and $domain in constructing a new return path. We could test for
3730 the use of these variables, but as it is so likely they will be used when the
3731 maximum is 1, we don't bother. Just leave the value alone. */
3733 if (address_count_max != 1 &&
3734 address_count_max < remote_delivery_count/remote_max_parallel)
3736 int new_max = remote_delivery_count/remote_max_parallel;
3737 int message_max = tp->connection_max_messages;
3738 if (connection_max_messages >= 0) message_max = connection_max_messages;
3739 message_max -= continue_sequence - 1;
3740 if (message_max > 0 && new_max > address_count_max * message_max)
3741 new_max = address_count_max * message_max;
3742 address_count_max = new_max;
3745 /************************************************************************/
3748 /* Pick off all addresses which have the same transport, errors address,
3749 destination, and extra headers. In some cases they point to the same host
3750 list, but we also need to check for identical host lists generated from
3751 entirely different domains. The host list pointers can be NULL in the case
3752 where the hosts are defined in the transport. There is also a configured
3753 maximum limit of addresses that can be handled at once (see comments above
3754 for how it is computed). */
3756 while ((next = *anchor) != NULL && address_count < address_count_max)
3758 if ((multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
3760 tp == next->transport
3762 same_hosts(next->host_list, addr->host_list)
3764 same_strings(next->p.errors_address, addr->p.errors_address)
3766 same_headers(next->p.extra_headers, addr->p.extra_headers)
3768 same_ugid(tp, next, addr)
3770 (next->p.remove_headers == addr->p.remove_headers ||
3771 (next->p.remove_headers != NULL &&
3772 addr->p.remove_headers != NULL &&
3773 Ustrcmp(next->p.remove_headers, addr->p.remove_headers) == 0)))
3775 *anchor = next->next;
3777 next->first = addr; /* remember top one (for retry processing) */
3782 else anchor = &(next->next);
3785 /* If we are acting as an MUA wrapper, all addresses must go in a single
3786 transaction. If not, put them back on the chain and yield FALSE. */
3788 if (mua_wrapper && addr_remote != NULL)
3790 last->next = addr_remote;
3795 /* Set up the expansion variables for this set of addresses */
3797 deliver_set_expansions(addr);
3799 /* Ensure any transport-set auth info is fresh */
3800 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
3802 /* Compute the return path, expanding a new one if required. The old one
3803 must be set first, as it might be referred to in the expansion. */
3805 if(addr->p.errors_address != NULL)
3806 return_path = addr->p.errors_address;
3807 #ifdef EXPERIMENTAL_SRS
3808 else if(addr->p.srs_sender != NULL)
3809 return_path = addr->p.srs_sender;
3812 return_path = sender_address;
3814 if (tp->return_path != NULL)
3816 uschar *new_return_path = expand_string(tp->return_path);
3817 if (new_return_path == NULL)
3819 if (!expand_string_forcedfail)
3821 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3822 string_sprintf("Failed to expand return path \"%s\": %s",
3823 tp->return_path, expand_string_message), fallback);
3827 else return_path = new_return_path;
3830 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
3831 logs and sets up error messages, so we just post-process and continue with
3832 the next address. */
3834 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
3836 remote_post_process(addr, LOG_MAIN|LOG_PANIC, NULL, fallback);
3840 /* If this transport has a setup function, call it now so that it gets
3841 run in this process and not in any subprocess. That way, the results of
3842 any setup that are retained by the transport can be reusable. One of the
3843 things the setup does is to set the fallback host lists in the addresses.
3844 That is why it is called at this point, before the continue delivery
3845 processing, because that might use the fallback hosts. */
3847 if (tp->setup != NULL)
3848 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
3850 /* If this is a run to continue delivery down an already-established
3851 channel, check that this set of addresses matches the transport and
3852 the channel. If it does not, defer the addresses. If a host list exists,
3853 we must check that the continue host is on the list. Otherwise, the
3854 host is set in the transport. */
3856 continue_more = FALSE; /* In case got set for the last lot */
3857 if (continue_transport != NULL)
3859 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
3860 if (ok && addr->host_list != NULL)
3864 for (h = addr->host_list; h != NULL; h = h->next)
3866 if (Ustrcmp(h->name, continue_hostname) == 0)
3867 { ok = TRUE; break; }
3871 /* Addresses not suitable; defer or queue for fallback hosts (which
3872 might be the continue host) and skip to next address. */
3876 DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n");
3879 if (addr->fallback_hosts != NULL && !fallback)
3883 next->host_list = next->fallback_hosts;
3884 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
3885 if (next->next == NULL) break;
3888 next->next = addr_fallback;
3889 addr_fallback = addr;
3894 while (next->next != NULL) next = next->next;
3895 next->next = addr_defer;
3902 /* Set a flag indicating whether there are further addresses that list
3903 the continued host. This tells the transport to leave the channel open,
3904 but not to pass it to another delivery process. */
3906 for (next = addr_remote; next != NULL; next = next->next)
3909 for (h = next->host_list; h != NULL; h = h->next)
3911 if (Ustrcmp(h->name, continue_hostname) == 0)
3912 { continue_more = TRUE; break; }
3917 /* The transports set up the process info themselves as they may connect
3918 to more than one remote machine. They also have to set up the filter
3919 arguments, if required, so that the host name and address are available
3922 transport_filter_argv = NULL;
3924 /* Create the pipe for inter-process communication. If pipe creation
3925 fails, it is probably because the value of remote_max_parallel is so
3926 large that too many file descriptors for pipes have been created. Arrange
3927 to wait for a process to finish, and then try again. If we still can't
3928 create a pipe when all processes have finished, break the retry loop. */
3932 if (pipe(pfd) == 0) pipe_done = TRUE;
3933 else if (parcount > 0) parmax = parcount;
3936 /* We need to make the reading end of the pipe non-blocking. There are
3937 two different options for this. Exim is cunningly (I hope!) coded so
3938 that it can use either of them, though it prefers O_NONBLOCK, which
3939 distinguishes between EOF and no-more-data. */
3942 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
3944 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
3947 /* If the maximum number of subprocesses already exist, wait for a process
3948 to finish. If we ran out of file descriptors, parmax will have been reduced
3949 from its initial value of remote_max_parallel. */
3951 par_reduce(parmax - 1, fallback);
3954 /* If we failed to create a pipe and there were no processes to wait
3955 for, we have to give up on this one. Do this outside the above loop
3956 so that we can continue the main loop. */
3960 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3961 string_sprintf("unable to create pipe: %s", strerror(errno)), fallback);
3965 /* Find a free slot in the pardata list. Must do this after the possible
3966 waiting for processes to finish, because a terminating process will free
3969 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3970 if (parlist[poffset].pid == 0) break;
3972 /* If there isn't one, there has been a horrible disaster. */
3974 if (poffset >= remote_max_parallel)
3976 (void)close(pfd[pipe_write]);
3977 (void)close(pfd[pipe_read]);
3978 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3979 US"Unexpectedly no free subprocess slot", fallback);
3983 /* Now fork a subprocess to do the remote delivery, but before doing so,
3984 ensure that any cached resourses are released so as not to interfere with
3985 what happens in the subprocess. */
3989 if ((pid = fork()) == 0)
3991 int fd = pfd[pipe_write];
3994 /* Setting this global in the subprocess means we need never clear it */
3995 transport_name = tp->name;
3997 /* There are weird circumstances in which logging is disabled */
3998 disable_logging = tp->disable_logging;
4000 /* Show pids on debug output if parallelism possible */
4002 if (parmax > 1 && (parcount > 0 || addr_remote != NULL))
4004 DEBUG(D_any|D_v) debug_selector |= D_pid;
4005 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
4008 /* Reset the random number generator, so different processes don't all
4009 have the same sequence. In the test harness we want different, but
4010 predictable settings for each delivery process, so do something explicit
4011 here rather they rely on the fixed reset in the random number function. */
4013 random_seed = running_in_test_harness? 42 + 2*delivery_count : 0;
4015 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4016 a new process that may be forked to do another delivery down the same
4019 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4021 /* Close open file descriptors for the pipes of other processes
4022 that are running in parallel. */
4024 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4025 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4027 /* This process has inherited a copy of the file descriptor
4028 for the data file, but its file pointer is shared with all the
4029 other processes running in parallel. Therefore, we have to re-open
4030 the file in order to get a new file descriptor with its own
4031 file pointer. We don't need to lock it, as the lock is held by
4032 the parent process. There doesn't seem to be any way of doing
4033 a dup-with-new-file-pointer. */
4035 (void)close(deliver_datafile);
4036 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir,
4038 deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0);
4040 if (deliver_datafile < 0)
4041 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4042 "parallel delivery: %s", spoolname, strerror(errno));
4044 /* Set the close-on-exec flag */
4046 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4049 /* Set the uid/gid of this process; bombs out on failure. */
4051 exim_setugid(uid, gid, use_initgroups,
4052 string_sprintf("remote delivery to %s with transport=%s",
4053 addr->address, tp->name));
4055 /* Close the unwanted half of this process' pipe, set the process state,
4056 and run the transport. Afterwards, transport_count will contain the number
4057 of bytes written. */
4059 (void)close(pfd[pipe_read]);
4060 set_process_info("delivering %s using %s", message_id, tp->name);
4061 debug_print_string(tp->debug_string);
4062 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4064 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4065 message_id, tp->name, addr->address, (addr->next == NULL)? "" : ", ...");
4067 /* Ensure any cached resources that we used are now released */
4071 /* Pass the result back down the pipe. This is a lot more information
4072 than is needed for a local delivery. We have to send back the error
4073 status for each address, the usability status for each host that is
4074 flagged as unusable, and all the retry items. When TLS is in use, we
4075 send also the cipher and peerdn information. Each type of information
4076 is flagged by an identifying byte, and is then in a fixed format (with
4077 strings terminated by zeros), and there is a final terminator at the
4078 end. The host information and retry information is all attached to
4079 the first address, so that gets sent at the start. */
4081 /* Host unusability information: for most success cases this will
4084 for (h = addr->host_list; h != NULL; h = h->next)
4086 if (h->address == NULL || h->status < hstatus_unusable) continue;
4087 sprintf(CS big_buffer, "H%c%c%s", h->status, h->why, h->address);
4088 rmt_dlv_checked_write(fd, big_buffer, Ustrlen(big_buffer+3) + 4);
4091 /* The number of bytes written. This is the same for each address. Even
4092 if we sent several copies of the message down the same connection, the
4093 size of each one is the same, and it's that value we have got because
4094 transport_count gets reset before calling transport_write_message(). */
4096 big_buffer[0] = 'S';
4097 memcpy(big_buffer+1, &transport_count, sizeof(transport_count));
4098 rmt_dlv_checked_write(fd, big_buffer, sizeof(transport_count) + 1);
4100 /* Information about what happened to each address. Four item types are
4101 used: an optional 'X' item first, for TLS information, then an optional "C"
4102 item for any client-auth info followed by 'R' items for any retry settings,
4103 and finally an 'A' item for the remaining data. */
4105 for(; addr != NULL; addr = addr->next)
4110 /* The certificate verification status goes into the flags */
4112 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4114 /* Use an X item only if there's something to send */
4120 sprintf(CS ptr, "X1%.128s", addr->cipher);
4126 sprintf(CS ptr, "%.512s", addr->peerdn);
4130 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4135 *ptr++ = 'X'; *ptr++ = '2';
4136 if (!tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4140 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4145 *ptr++ = 'X'; *ptr++ = '3';
4146 if (!tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4150 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4152 # ifdef EXPERIMENTAL_OCSP
4153 if (addr->ocsp > OCSP_NOT_REQ)
4156 sprintf(CS ptr, "X4%c", addr->ocsp + '0');
4158 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4161 #endif /*SUPPORT_TLS
4163 if (client_authenticator)
4166 sprintf(CS big_buffer, "C1%.64s", client_authenticator);
4168 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4170 if (client_authenticated_id)
4173 sprintf(CS big_buffer, "C2%.64s", client_authenticated_id);
4175 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4177 if (client_authenticated_sender)
4180 sprintf(CS big_buffer, "C3%.64s", client_authenticated_sender);
4182 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4185 #ifdef EXPERIMENTAL_PRDR
4186 if (addr->flags & af_prdr_used) rmt_dlv_checked_write(fd, "P", 1);
4189 /* Retry information: for most success cases this will be null. */
4191 for (r = addr->retries; r != NULL; r = r->next)
4194 sprintf(CS big_buffer, "R%c%.500s", r->flags, r->key);
4195 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4196 memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno));
4197 ptr += sizeof(r->basic_errno);
4198 memcpy(ptr, &(r->more_errno), sizeof(r->more_errno));
4199 ptr += sizeof(r->more_errno);
4200 if (r->message == NULL) *ptr++ = 0; else
4202 sprintf(CS ptr, "%.512s", r->message);
4205 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4208 /* The rest of the information goes in an 'A' item. */
4210 ptr = big_buffer + 3;
4211 sprintf(CS big_buffer, "A%c%c", addr->transport_return,
4212 addr->special_action);
4213 memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno));
4214 ptr += sizeof(addr->basic_errno);
4215 memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno));
4216 ptr += sizeof(addr->more_errno);
4217 memcpy(ptr, &(addr->flags), sizeof(addr->flags));
4218 ptr += sizeof(addr->flags);
4220 if (addr->message == NULL) *ptr++ = 0; else
4222 sprintf(CS ptr, "%.1024s", addr->message);
4226 if (addr->user_message == NULL) *ptr++ = 0; else
4228 sprintf(CS ptr, "%.1024s", addr->user_message);
4232 if (addr->host_used == NULL) *ptr++ = 0; else
4234 sprintf(CS ptr, "%.256s", addr->host_used->name);
4236 sprintf(CS ptr, "%.64s", addr->host_used->address);
4238 memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port));
4239 ptr += sizeof(addr->host_used->port);
4241 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4244 /* Add termination flag, close the pipe, and that's it. The character
4245 after 'Z' indicates whether continue_transport is now NULL or not.
4246 A change from non-NULL to NULL indicates a problem with a continuing
4249 big_buffer[0] = 'Z';
4250 big_buffer[1] = (continue_transport == NULL)? '0' : '1';
4251 rmt_dlv_checked_write(fd, big_buffer, 2);
4256 /* Back in the mainline: close the unwanted half of the pipe. */
4258 (void)close(pfd[pipe_write]);
4260 /* Fork failed; defer with error message */
4264 (void)close(pfd[pipe_read]);
4265 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4266 string_sprintf("fork failed for remote delivery to %s: %s",
4267 addr->domain, strerror(errno)), fallback);
4271 /* Fork succeeded; increment the count, and remember relevant data for
4272 when the process finishes. */
4275 parlist[poffset].addrlist = parlist[poffset].addr = addr;
4276 parlist[poffset].pid = pid;
4277 parlist[poffset].fd = pfd[pipe_read];
4278 parlist[poffset].done = FALSE;
4279 parlist[poffset].msg = NULL;
4280 parlist[poffset].return_path = return_path;
4282 /* If the process we've just started is sending a message down an existing
4283 channel, wait for it now. This ensures that only one such process runs at
4284 once, whatever the value of remote_max parallel. Otherwise, we might try to
4285 send two or more messages simultaneously down the same channel. This could
4286 happen if there are different domains that include the same host in otherwise
4287 different host lists.
4289 Also, if the transport closes down the channel, this information gets back
4290 (continue_transport gets set to NULL) before we consider any other addresses
4293 if (continue_transport != NULL) par_reduce(0, fallback);
4295 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4296 newly created process get going before we create another process. This should
4297 ensure repeatability in the tests. We only need to wait a tad. */
4299 else if (running_in_test_harness) millisleep(500);
4302 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4303 are still running and post-process their addresses. */
4305 par_reduce(0, fallback);
4312 /*************************************************
4313 * Split an address into local part and domain *
4314 *************************************************/
4316 /* This function initializes an address for routing by splitting it up into a
4317 local part and a domain. The local part is set up twice - once in its original
4318 casing, and once in lower case, and it is dequoted. We also do the "percent
4319 hack" for configured domains. This may lead to a DEFER result if a lookup
4320 defers. When a percent-hacking takes place, we insert a copy of the original
4321 address as a new parent of this address, as if we have had a redirection.
4324 addr points to an addr_item block containing the address
4327 DEFER - could not determine if domain is %-hackable
4331 deliver_split_address(address_item *addr)
4333 uschar *address = addr->address;
4334 uschar *domain = Ustrrchr(address, '@');
4336 int len = domain - address;
4338 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
4340 /* The implication in the RFCs (though I can't say I've seen it spelled out
4341 explicitly) is that quoting should be removed from local parts at the point
4342 where they are locally interpreted. [The new draft "821" is more explicit on
4343 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4344 removing quoting backslashes and any unquoted doublequotes. */
4346 t = addr->cc_local_part = store_get(len+1);
4349 register int c = *address++;
4350 if (c == '\"') continue;
4360 /* We do the percent hack only for those domains that are listed in
4361 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4363 if (percent_hack_domains != NULL)
4366 uschar *new_address = NULL;
4367 uschar *local_part = addr->cc_local_part;
4369 deliver_domain = addr->domain; /* set $domain */
4371 while ((rc = match_isinlist(deliver_domain, &percent_hack_domains, 0,
4372 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
4374 (t = Ustrrchr(local_part, '%')) != NULL)
4376 new_address = string_copy(local_part);
4377 new_address[t - local_part] = '@';
4378 deliver_domain = string_copylc(t+1);
4379 local_part = string_copyn(local_part, t - local_part);
4382 if (rc == DEFER) return DEFER; /* lookup deferred */
4384 /* If hackery happened, set up new parent and alter the current address. */
4386 if (new_address != NULL)
4388 address_item *new_parent = store_get(sizeof(address_item));
4389 *new_parent = *addr;
4390 addr->parent = new_parent;
4391 addr->address = new_address;
4392 addr->unique = string_copy(new_address);
4393 addr->domain = deliver_domain;
4394 addr->cc_local_part = local_part;
4395 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
4400 /* Create the lowercased version of the final local part, and make that the
4401 default one to be used. */
4403 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
4410 /*************************************************
4411 * Get next error message text *
4412 *************************************************/
4414 /* If f is not NULL, read the next "paragraph", from a customized error message
4415 text file, terminated by a line containing ****, and expand it.
4418 f NULL or a file to read from
4419 which string indicating which string (for errors)
4421 Returns: NULL or an expanded string
4425 next_emf(FILE *f, uschar *which)
4429 uschar *para, *yield;
4432 if (f == NULL) return NULL;
4434 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4435 Ustrcmp(buffer, "****\n") == 0) return NULL;
4437 para = store_get(size);
4440 para = string_cat(para, &size, &ptr, buffer, Ustrlen(buffer));
4441 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4442 Ustrcmp(buffer, "****\n") == 0) break;
4446 yield = expand_string(para);
4447 if (yield != NULL) return yield;
4449 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
4450 "bounce_message_file or warn_message_file (%s): %s", which,
4451 expand_string_message);
4458 /*************************************************
4459 * Close down a passed transport channel *
4460 *************************************************/
4462 /* This function is called when a passed transport channel cannot be used.
4463 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
4464 so that the function call can be the argument of a "return" statement.
4467 Returns: DELIVER_NOT_ATTEMPTED
4471 continue_closedown(void)
4473 if (continue_transport != NULL)
4475 transport_instance *t;
4476 for (t = transports; t != NULL; t = t->next)
4478 if (Ustrcmp(t->name, continue_transport) == 0)
4480 if (t->info->closedown != NULL) (t->info->closedown)(t);
4485 return DELIVER_NOT_ATTEMPTED;
4491 /*************************************************
4492 * Print address information *
4493 *************************************************/
4495 /* This function is called to output an address, or information about an
4496 address, for bounce or defer messages. If the hide_child flag is set, all we
4497 output is the original ancestor address.
4500 addr points to the address
4501 f the FILE to print to
4502 si an initial string
4503 sc a continuation string for before "generated"
4506 Returns: TRUE if the address is not hidden
4510 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
4514 uschar *printed = US"";
4515 address_item *ancestor = addr;
4516 while (ancestor->parent != NULL) ancestor = ancestor->parent;
4518 fprintf(f, "%s", CS si);
4520 if (addr->parent != NULL && testflag(addr, af_hide_child))
4522 printed = US"an undisclosed address";
4525 else if (!testflag(addr, af_pfr) || addr->parent == NULL)
4526 printed = addr->address;
4530 uschar *s = addr->address;
4533 if (addr->address[0] == '>') { ss = US"mail"; s++; }
4534 else if (addr->address[0] == '|') ss = US"pipe";
4537 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
4538 printed = addr->parent->address;
4541 fprintf(f, "%s", CS string_printing(printed));
4543 if (ancestor != addr)
4545 uschar *original = (ancestor->onetime_parent == NULL)?
4546 ancestor->address : ancestor->onetime_parent;
4547 if (strcmpic(original, printed) != 0)
4548 fprintf(f, "%s(%sgenerated from %s)", sc,
4549 (ancestor != addr->parent)? "ultimately " : "",
4550 string_printing(original));
4553 fprintf(f, "%s", CS se);
4561 /*************************************************
4562 * Print error for an address *
4563 *************************************************/
4565 /* This function is called to print the error information out of an address for
4566 a bounce or a warning message. It tries to format the message reasonably by
4567 introducing newlines. All lines are indented by 4; the initial printing
4568 position must be set before calling.
4570 This function used always to print the error. Nowadays we want to restrict it
4571 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
4572 and filter "fail". We no longer pass other information willy-nilly in bounce
4573 and warning messages. Text in user_message is always output; text in message
4574 only if the af_pass_message flag is set.
4578 f the FILE to print on
4585 print_address_error(address_item *addr, FILE *f, uschar *t)
4587 int count = Ustrlen(t);
4588 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
4592 if (addr->user_message != NULL) s = addr->user_message; else return;
4595 fprintf(f, "\n %s", t);
4599 if (*s == '\\' && s[1] == 'n')
4609 if (*s++ == ':' && isspace(*s) && count > 45)
4611 fprintf(f, "\n "); /* sic (because space follows) */
4623 /*************************************************
4624 * Check list of addresses for duplication *
4625 *************************************************/
4627 /* This function was introduced when the test for duplicate addresses that are
4628 not pipes, files, or autoreplies was moved from the middle of routing to when
4629 routing was complete. That was to fix obscure cases when the routing history
4630 affects the subsequent routing of identical addresses. This function is called
4631 after routing, to check that the final routed addresses are not duplicates.
4633 If we detect a duplicate, we remember what it is a duplicate of. Note that
4634 pipe, file, and autoreply de-duplication is handled during routing, so we must
4635 leave such "addresses" alone here, as otherwise they will incorrectly be
4638 Argument: address of list anchor
4643 do_duplicate_check(address_item **anchor)
4646 while ((addr = *anchor) != NULL)
4649 if (testflag(addr, af_pfr))
4651 anchor = &(addr->next);
4653 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
4655 DEBUG(D_deliver|D_route)
4656 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
4657 *anchor = addr->next;
4658 addr->dupof = tnode->data.ptr;
4659 addr->next = addr_duplicate;
4660 addr_duplicate = addr;
4664 tree_add_duplicate(addr->unique, addr);
4665 anchor = &(addr->next);
4673 /*************************************************
4674 * Deliver one message *
4675 *************************************************/
4677 /* This is the function which is called when a message is to be delivered. It
4678 is passed the id of the message. It is possible that the message no longer
4679 exists, if some other process has delivered it, and it is also possible that
4680 the message is being worked on by another process, in which case the data file
4683 If no delivery is attempted for any of the above reasons, the function returns
4684 DELIVER_NOT_ATTEMPTED.
4686 If the give_up flag is set true, do not attempt any deliveries, but instead
4687 fail all outstanding addresses and return the message to the sender (or
4690 A delivery operation has a process all to itself; we never deliver more than
4691 one message in the same process. Therefore we needn't worry too much about
4695 id the id of the message to be delivered
4696 forced TRUE if delivery was forced by an administrator; this overrides
4697 retry delays and causes a delivery to be tried regardless
4698 give_up TRUE if an administrator has requested that delivery attempts
4701 Returns: When the global variable mua_wrapper is FALSE:
4702 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
4703 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
4704 When the global variable mua_wrapper is TRUE:
4705 DELIVER_MUA_SUCCEEDED if delivery succeeded
4706 DELIVER_MUA_FAILED if delivery failed
4707 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
4711 deliver_message(uschar *id, BOOL forced, BOOL give_up)
4714 int final_yield = DELIVER_ATTEMPTED_NORMAL;
4715 time_t now = time(NULL);
4716 address_item *addr_last = NULL;
4717 uschar *filter_message = NULL;
4719 int process_recipients = RECIP_ACCEPT;
4722 extern int acl_where;
4724 uschar *info = (queue_run_pid == (pid_t)0)?
4725 string_sprintf("delivering %s", id) :
4726 string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
4728 /* If the D_process_info bit is on, set_process_info() will output debugging
4729 information. If not, we want to show this initial information if D_deliver or
4730 D_queue_run is set or in verbose mode. */
4732 set_process_info("%s", info);
4734 if ((debug_selector & D_process_info) == 0 &&
4735 (debug_selector & (D_deliver|D_queue_run|D_v)) != 0)
4736 debug_printf("%s\n", info);
4738 /* Ensure that we catch any subprocesses that are created. Although Exim
4739 sets SIG_DFL as its initial default, some routes through the code end up
4740 here with it set to SIG_IGN - cases where a non-synchronous delivery process
4741 has been forked, but no re-exec has been done. We use sigaction rather than
4742 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
4743 sure it is turned off. (There was a problem on AIX with this.) */
4747 struct sigaction act;
4748 act.sa_handler = SIG_DFL;
4749 sigemptyset(&(act.sa_mask));
4751 sigaction(SIGCHLD, &act, NULL);
4754 signal(SIGCHLD, SIG_DFL);
4757 /* Make the forcing flag available for routers and transports, set up the
4758 global message id field, and initialize the count for returned files and the
4759 message size. This use of strcpy() is OK because the length id is checked when
4760 it is obtained from a command line (the -M or -q options), and otherwise it is
4761 known to be a valid message id. */
4763 Ustrcpy(message_id, id);
4764 deliver_force = forced;
4768 /* Initialize some flags */
4770 update_spool = FALSE;
4771 remove_journal = TRUE;
4773 /* Set a known context for any ACLs we call via expansions */
4774 acl_where = ACL_WHERE_DELIVERY;
4776 /* Reset the random number generator, so that if several delivery processes are
4777 started from a queue runner that has already used random numbers (for sorting),
4778 they don't all get the same sequence. */
4782 /* Open and lock the message's data file. Exim locks on this one because the
4783 header file may get replaced as it is re-written during the delivery process.
4784 Any failures cause messages to be written to the log, except for missing files
4785 while queue running - another process probably completed delivery. As part of
4786 opening the data file, message_subdir gets set. */
4788 if (!spool_open_datafile(id))
4789 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4791 /* The value of message_size at this point has been set to the data length,
4792 plus one for the blank line that notionally precedes the data. */
4794 /* Now read the contents of the header file, which will set up the headers in
4795 store, and also the list of recipients and the tree of non-recipients and
4796 assorted flags. It updates message_size. If there is a reading or format error,
4797 give up; if the message has been around for sufficiently long, remove it. */
4799 sprintf(CS spoolname, "%s-H", id);
4800 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
4802 if (errno == ERRNO_SPOOLFORMAT)
4804 struct stat statbuf;
4805 sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
4807 if (Ustat(big_buffer, &statbuf) == 0)
4808 log_write(0, LOG_MAIN, "Format error in spool file %s: "
4809 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
4810 else log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
4813 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
4816 /* If we managed to read the envelope data, received_time contains the
4817 time the message was received. Otherwise, we can calculate it from the
4820 if (rc != spool_read_hdrerror)
4823 for (i = 0; i < 6; i++)
4824 received_time = received_time * BASE_62 + tab62[id[i] - '0'];
4827 /* If we've had this malformed message too long, sling it. */
4829 if (now - received_time > keep_malformed)
4831 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
4833 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
4835 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
4837 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
4839 log_write(0, LOG_MAIN, "Message removed because older than %s",
4840 readconf_printtime(keep_malformed));
4843 (void)close(deliver_datafile);
4844 deliver_datafile = -1;
4845 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4848 /* The spool header file has been read. Look to see if there is an existing
4849 journal file for this message. If there is, it means that a previous delivery
4850 attempt crashed (program or host) before it could update the spool header file.
4851 Read the list of delivered addresses from the journal and add them to the
4852 nonrecipients tree. Then update the spool file. We can leave the journal in
4853 existence, as it will get further successful deliveries added to it in this
4854 run, and it will be deleted if this function gets to its end successfully.
4855 Otherwise it might be needed again. */
4857 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
4858 jread = Ufopen(spoolname, "rb");
4861 while (Ufgets(big_buffer, big_buffer_size, jread) != NULL)
4863 int n = Ustrlen(big_buffer);
4864 big_buffer[n-1] = 0;
4865 tree_add_nonrecipient(big_buffer);
4866 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
4867 "journal file\n", big_buffer);
4869 (void)fclose(jread);
4870 /* Panic-dies on error */
4871 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
4873 else if (errno != ENOENT)
4875 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
4876 "%s", strerror(errno));
4877 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4880 /* A null recipients list indicates some kind of disaster. */
4882 if (recipients_list == NULL)
4884 (void)close(deliver_datafile);
4885 deliver_datafile = -1;
4886 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", spoolname);
4887 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4891 /* Handle a message that is frozen. There are a number of different things that
4892 can happen, but in the default situation, unless forced, no delivery is
4897 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
4898 /* Moving to another directory removes the message from Exim's view. Other
4899 tools must be used to deal with it. Logging of this action happens in
4900 spool_move_message() and its subfunctions. */
4902 if (move_frozen_messages &&
4903 spool_move_message(id, message_subdir, US"", US"F"))
4904 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4907 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
4908 maximum time to keep messages that are frozen. Thaw if we reach it, with a
4909 flag causing all recipients to be failed. The time is the age of the
4910 message, not the time since freezing. */
4912 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
4914 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
4915 process_recipients = RECIP_FAIL_TIMEOUT;
4918 /* For bounce messages (and others with no sender), thaw if the error message
4919 ignore timer is exceeded. The message will be discarded if this delivery
4922 else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
4924 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
4927 /* If this is a bounce message, or there's no auto thaw, or we haven't
4928 reached the auto thaw time yet, and this delivery is not forced by an admin
4929 user, do not attempt delivery of this message. Note that forced is set for
4930 continuing messages down the same channel, in order to skip load checking and
4931 ignore hold domains, but we don't want unfreezing in that case. */
4935 if ((sender_address[0] == 0 ||
4937 now <= deliver_frozen_at + auto_thaw
4940 (!forced || !deliver_force_thaw || !admin_user ||
4941 continue_hostname != NULL
4944 (void)close(deliver_datafile);
4945 deliver_datafile = -1;
4946 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
4947 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4950 /* If delivery was forced (by an admin user), assume a manual thaw.
4951 Otherwise it's an auto thaw. */
4955 deliver_manual_thaw = TRUE;
4956 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
4958 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
4961 /* We get here if any of the rules for unfreezing have triggered. */
4963 deliver_freeze = FALSE;
4964 update_spool = TRUE;
4968 /* Open the message log file if we are using them. This records details of
4969 deliveries, deferments, and failures for the benefit of the mail administrator.
4970 The log is not used by exim itself to track the progress of a message; that is
4971 done by rewriting the header spool file. */
4978 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
4979 fd = open_msglog_file(spoolname, SPOOL_MODE, &error);
4983 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
4984 spoolname, strerror(errno));
4985 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4988 /* Make a C stream out of it. */
4990 message_log = fdopen(fd, "a");
4991 if (message_log == NULL)
4993 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
4994 spoolname, strerror(errno));
4995 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5000 /* If asked to give up on a message, log who did it, and set the action for all
5005 struct passwd *pw = getpwuid(real_uid);
5006 log_write(0, LOG_MAIN, "cancelled by %s", (pw != NULL)?
5007 US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5008 process_recipients = RECIP_FAIL;
5011 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5013 else if (received_count > received_headers_max)
5014 process_recipients = RECIP_FAIL_LOOP;
5016 /* Otherwise, if a system-wide, address-independent message filter is
5017 specified, run it now, except in the case when we are failing all recipients as
5018 a result of timeout_frozen_after. If the system filter yields "delivered", then
5019 ignore the true recipients of the message. Failure of the filter file is
5020 logged, and the delivery attempt fails. */
5022 else if (system_filter != NULL && process_recipients != RECIP_FAIL_TIMEOUT)
5027 redirect_block redirect;
5029 if (system_filter_uid_set)
5031 ugid.uid = system_filter_uid;
5032 ugid.gid = system_filter_gid;
5033 ugid.uid_set = ugid.gid_set = TRUE;
5037 ugid.uid_set = ugid.gid_set = FALSE;
5040 return_path = sender_address;
5041 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5042 system_filtering = TRUE;
5044 /* Any error in the filter file causes a delivery to be abandoned. */
5046 redirect.string = system_filter;
5047 redirect.isfile = TRUE;
5048 redirect.check_owner = redirect.check_group = FALSE;
5049 redirect.owners = NULL;
5050 redirect.owngroups = NULL;
5052 redirect.modemask = 0;
5054 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5057 &redirect, /* Where the data is */
5058 RDO_DEFER | /* Turn on all the enabling options */
5059 RDO_FAIL | /* Leave off all the disabling options */
5064 NULL, /* No :include: restriction (not used in filter) */
5065 NULL, /* No sieve vacation directory (not sieve!) */
5066 NULL, /* No sieve enotify mailto owner (not sieve!) */
5067 NULL, /* No sieve user address (not sieve!) */
5068 NULL, /* No sieve subaddress (not sieve!) */
5069 &ugid, /* uid/gid data */
5070 &addr_new, /* Where to hang generated addresses */
5071 &filter_message, /* Where to put error message */
5072 NULL, /* Don't skip syntax errors */
5073 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5074 US"system filter"); /* For error messages */
5076 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5078 if (rc == FF_ERROR || rc == FF_NONEXIST)
5080 (void)close(deliver_datafile);
5081 deliver_datafile = -1;
5082 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5083 string_printing(filter_message));
5084 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5087 /* Reset things. If the filter message is an empty string, which can happen
5088 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5090 system_filtering = FALSE;
5091 enable_dollar_recipients = FALSE;
5092 if (filter_message != NULL && filter_message[0] == 0) filter_message = NULL;
5094 /* Save the values of the system filter variables so that user filters
5097 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5099 /* The filter can request that delivery of the original addresses be
5104 process_recipients = RECIP_DEFER;
5105 deliver_msglog("Delivery deferred by system filter\n");
5106 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5109 /* The filter can request that a message be frozen, but this does not
5110 take place if the message has been manually thawed. In that case, we must
5111 unset "delivered", which is forced by the "freeze" command to make -bF
5114 else if (rc == FF_FREEZE && !deliver_manual_thaw)
5116 deliver_freeze = TRUE;
5117 deliver_frozen_at = time(NULL);
5118 process_recipients = RECIP_DEFER;
5119 frozen_info = string_sprintf(" by the system filter%s%s",
5120 (filter_message == NULL)? US"" : US": ",
5121 (filter_message == NULL)? US"" : filter_message);
5124 /* The filter can request that a message be failed. The error message may be
5125 quite long - it is sent back to the sender in the bounce - but we don't want
5126 to fill up the log with repetitions of it. If it starts with << then the text
5127 between << and >> is written to the log, with the rest left for the bounce
5130 else if (rc == FF_FAIL)
5132 uschar *colon = US"";
5133 uschar *logmsg = US"";
5136 process_recipients = RECIP_FAIL_FILTER;
5138 if (filter_message != NULL)
5142 if (filter_message[0] == '<' && filter_message[1] == '<' &&
5143 (logend = Ustrstr(filter_message, ">>")) != NULL)
5145 logmsg = filter_message + 2;
5146 loglen = logend - logmsg;
5147 filter_message = logend + 2;
5148 if (filter_message[0] == 0) filter_message = NULL;
5152 logmsg = filter_message;
5153 loglen = Ustrlen(filter_message);
5157 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
5161 /* Delivery can be restricted only to those recipients (if any) that the
5162 filter specified. */
5164 else if (rc == FF_DELIVERED)
5166 process_recipients = RECIP_IGNORE;
5167 if (addr_new == NULL)
5168 log_write(0, LOG_MAIN, "=> discarded (system filter)");
5170 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
5173 /* If any new addresses were created by the filter, fake up a "parent"
5174 for them. This is necessary for pipes, etc., which are expected to have
5175 parents, and it also gives some sensible logging for others. Allow
5176 pipes, files, and autoreplies, and run them as the filter uid if set,
5177 otherwise as the current uid. */
5179 if (addr_new != NULL)
5181 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
5182 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
5184 /* The text "system-filter" is tested in transport_set_up_command() and in
5185 set_up_shell_command() in the pipe transport, to enable them to permit
5186 $recipients, so don't change it here without also changing it there. */
5188 address_item *p = addr_new;
5189 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
5191 parent->domain = string_copylc(qualify_domain_recipient);
5192 parent->local_part = US"system-filter";
5194 /* As part of this loop, we arrange for addr_last to end up pointing
5195 at the final address. This is used if we go on to add addresses for the
5196 original recipients. */
5200 if (parent->child_count == SHRT_MAX)
5201 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
5202 "than %d delivery addresses", SHRT_MAX);
5203 parent->child_count++;
5206 if (testflag(p, af_pfr))
5212 setflag(p, af_uid_set |
5218 /* Find the name of the system filter's appropriate pfr transport */
5220 if (p->address[0] == '|')
5223 tpname = system_filter_pipe_transport;
5224 address_pipe = p->address;
5226 else if (p->address[0] == '>')
5229 tpname = system_filter_reply_transport;
5233 if (p->address[Ustrlen(p->address)-1] == '/')
5235 type = US"directory";
5236 tpname = system_filter_directory_transport;
5241 tpname = system_filter_file_transport;
5243 address_file = p->address;
5246 /* Now find the actual transport, first expanding the name. We have
5247 set address_file or address_pipe above. */
5251 uschar *tmp = expand_string(tpname);
5252 address_file = address_pipe = NULL;
5254 p->message = string_sprintf("failed to expand \"%s\" as a "
5255 "system filter transport name", tpname);
5260 p->message = string_sprintf("system_filter_%s_transport is unset",
5266 transport_instance *tp;
5267 for (tp = transports; tp != NULL; tp = tp->next)
5269 if (Ustrcmp(tp->name, tpname) == 0)
5276 p->message = string_sprintf("failed to find \"%s\" transport "
5277 "for system filter delivery", tpname);
5280 /* If we couldn't set up a transport, defer the delivery, putting the
5281 error on the panic log as well as the main log. */
5283 if (p->transport == NULL)
5285 address_item *badp = p;
5287 if (addr_last == NULL) addr_new = p; else addr_last->next = p;
5288 badp->local_part = badp->address; /* Needed for log line */
5289 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
5292 } /* End of pfr handling */
5294 /* Either a non-pfr delivery, or we found a transport */
5296 DEBUG(D_deliver|D_filter)
5297 debug_printf("system filter added %s\n", p->address);
5301 } /* Loop through all addr_new addresses */
5306 /* Scan the recipients list, and for every one that is not in the non-
5307 recipients tree, add an addr item to the chain of new addresses. If the pno
5308 value is non-negative, we must set the onetime parent from it. This which
5309 points to the relevant entry in the recipients list.
5311 This processing can be altered by the setting of the process_recipients
5312 variable, which is changed if recipients are to be ignored, failed, or
5313 deferred. This can happen as a result of system filter activity, or if the -Mg
5314 option is used to fail all of them.
5316 Duplicate addresses are handled later by a different tree structure; we can't
5317 just extend the non-recipients tree, because that will be re-written to the
5318 spool if the message is deferred, and in any case there are casing
5319 complications for local addresses. */
5321 if (process_recipients != RECIP_IGNORE)
5323 for (i = 0; i < recipients_count; i++)
5325 if (tree_search(tree_nonrecipients, recipients_list[i].address) == NULL)
5327 recipient_item *r = recipients_list + i;
5328 address_item *new = deliver_make_addr(r->address, FALSE);
5329 new->p.errors_address = r->errors_to;
5332 new->onetime_parent = recipients_list[r->pno].address;
5334 switch (process_recipients)
5336 /* RECIP_DEFER is set when a system filter freezes a message. */
5339 new->next = addr_defer;
5344 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
5347 case RECIP_FAIL_FILTER:
5349 (filter_message == NULL)? US"delivery cancelled" : filter_message;
5350 setflag(new, af_pass_message);
5351 goto RECIP_QUEUE_FAILED; /* below */
5354 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
5355 than the value in timeout_frozen_after. Treat non-bounce messages
5356 similarly to -Mg; for bounce messages we just want to discard, so
5357 don't put the address on the failed list. The timeout has already
5360 case RECIP_FAIL_TIMEOUT:
5361 new->message = US"delivery cancelled; message timed out";
5362 goto RECIP_QUEUE_FAILED; /* below */
5365 /* RECIP_FAIL is set when -Mg has been used. */
5368 new->message = US"delivery cancelled by administrator";
5371 /* Common code for the failure cases above. If this is not a bounce
5372 message, put the address on the failed list so that it is used to
5373 create a bounce. Otherwise do nothing - this just discards the address.
5374 The incident has already been logged. */
5377 if (sender_address[0] != 0)
5379 new->next = addr_failed;
5385 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
5386 in the message. Process each address as a routing failure; if this
5387 is a bounce message, it will get frozen. */
5389 case RECIP_FAIL_LOOP:
5390 new->message = US"Too many \"Received\" headers - suspected mail loop";
5391 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5395 /* Value should be RECIP_ACCEPT; take this as the safe default. */
5398 if (addr_new == NULL) addr_new = new; else addr_last->next = new;
5408 address_item *p = addr_new;
5409 debug_printf("Delivery address list:\n");
5412 debug_printf(" %s %s\n", p->address, (p->onetime_parent == NULL)? US"" :
5418 /* Set up the buffers used for copying over the file when delivering. */
5420 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
5421 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
5425 /* Until there are no more new addresses, handle each one as follows:
5427 . If this is a generated address (indicated by the presence of a parent
5428 pointer) then check to see whether it is a pipe, file, or autoreply, and
5429 if so, handle it directly here. The router that produced the address will
5430 have set the allow flags into the address, and also set the uid/gid required.
5431 Having the routers generate new addresses and then checking them here at
5432 the outer level is tidier than making each router do the checking, and
5433 means that routers don't need access to the failed address queue.
5435 . Break up the address into local part and domain, and make lowercased
5436 versions of these strings. We also make unquoted versions of the local part.
5438 . Handle the percent hack for those domains for which it is valid.
5440 . For child addresses, determine if any of the parents have the same address.
5441 If so, generate a different string for previous delivery checking. Without
5442 this code, if the address spqr generates spqr via a forward or alias file,
5443 delivery of the generated spqr stops further attempts at the top level spqr,
5444 which is not what is wanted - it may have generated other addresses.
5446 . Check on the retry database to see if routing was previously deferred, but
5447 only if in a queue run. Addresses that are to be routed are put on the
5448 addr_route chain. Addresses that are to be deferred are put on the
5449 addr_defer chain. We do all the checking first, so as not to keep the
5450 retry database open any longer than necessary.
5452 . Now we run the addresses through the routers. A router may put the address
5453 on either the addr_local or the addr_remote chain for local or remote
5454 delivery, respectively, or put it on the addr_failed chain if it is
5455 undeliveable, or it may generate child addresses and put them on the
5456 addr_new chain, or it may defer an address. All the chain anchors are
5457 passed as arguments so that the routers can be called for verification
5460 . If new addresses have been generated by the routers, da capo.
5463 header_rewritten = FALSE; /* No headers rewritten yet */
5464 while (addr_new != NULL) /* Loop until all addresses dealt with */
5466 address_item *addr, *parent;
5467 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
5469 /* Failure to open the retry database is treated the same as if it does
5470 not exist. In both cases, dbm_file is NULL. */
5472 if (dbm_file == NULL)
5474 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
5475 debug_printf("no retry data available\n");
5478 /* Scan the current batch of new addresses, to handle pipes, files and
5479 autoreplies, and determine which others are ready for routing. */
5481 while (addr_new != NULL)
5486 dbdata_retry *domain_retry_record;
5487 dbdata_retry *address_retry_record;
5490 addr_new = addr->next;
5492 DEBUG(D_deliver|D_retry|D_route)
5494 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5495 debug_printf("Considering: %s\n", addr->address);
5498 /* Handle generated address that is a pipe or a file or an autoreply. */
5500 if (testflag(addr, af_pfr))
5502 /* If an autoreply in a filter could not generate a syntactically valid
5503 address, give up forthwith. Set af_ignore_error so that we don't try to
5504 generate a bounce. */
5506 if (testflag(addr, af_bad_reply))
5508 addr->basic_errno = ERRNO_BADADDRESS2;
5509 addr->local_part = addr->address;
5511 US"filter autoreply generated syntactically invalid recipient";
5512 setflag(addr, af_ignore_error);
5513 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5514 continue; /* with the next new address */
5517 /* If two different users specify delivery to the same pipe or file or
5518 autoreply, there should be two different deliveries, so build a unique
5519 string that incorporates the original address, and use this for
5520 duplicate testing and recording delivery, and also for retrying. */
5523 string_sprintf("%s:%s", addr->address, addr->parent->unique +
5524 (testflag(addr->parent, af_homonym)? 3:0));
5526 addr->address_retry_key = addr->domain_retry_key =
5527 string_sprintf("T:%s", addr->unique);
5529 /* If a filter file specifies two deliveries to the same pipe or file,
5530 we want to de-duplicate, but this is probably not wanted for two mail
5531 commands to the same address, where probably both should be delivered.
5532 So, we have to invent a different unique string in that case. Just
5533 keep piling '>' characters on the front. */
5535 if (addr->address[0] == '>')
5537 while (tree_search(tree_duplicates, addr->unique) != NULL)
5538 addr->unique = string_sprintf(">%s", addr->unique);
5541 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
5543 DEBUG(D_deliver|D_route)
5544 debug_printf("%s is a duplicate address: discarded\n", addr->address);
5545 addr->dupof = tnode->data.ptr;
5546 addr->next = addr_duplicate;
5547 addr_duplicate = addr;
5551 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5553 /* Check for previous delivery */
5555 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5557 DEBUG(D_deliver|D_route)
5558 debug_printf("%s was previously delivered: discarded\n", addr->address);
5559 child_done(addr, tod_stamp(tod_log));
5563 /* Save for checking future duplicates */
5565 tree_add_duplicate(addr->unique, addr);
5567 /* Set local part and domain */
5569 addr->local_part = addr->address;
5570 addr->domain = addr->parent->domain;
5572 /* Ensure that the delivery is permitted. */
5574 if (testflag(addr, af_file))
5576 if (!testflag(addr, af_allow_file))
5578 addr->basic_errno = ERRNO_FORBIDFILE;
5579 addr->message = US"delivery to file forbidden";
5580 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5581 continue; /* with the next new address */
5584 else if (addr->address[0] == '|')
5586 if (!testflag(addr, af_allow_pipe))
5588 addr->basic_errno = ERRNO_FORBIDPIPE;
5589 addr->message = US"delivery to pipe forbidden";
5590 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5591 continue; /* with the next new address */
5594 else if (!testflag(addr, af_allow_reply))
5596 addr->basic_errno = ERRNO_FORBIDREPLY;
5597 addr->message = US"autoreply forbidden";
5598 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5599 continue; /* with the next new address */
5602 /* If the errno field is already set to BADTRANSPORT, it indicates
5603 failure to expand a transport string, or find the associated transport,
5604 or an unset transport when one is required. Leave this test till now so
5605 that the forbid errors are given in preference. */
5607 if (addr->basic_errno == ERRNO_BADTRANSPORT)
5609 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5613 /* Treat /dev/null as a special case and abandon the delivery. This
5614 avoids having to specify a uid on the transport just for this case.
5615 Arrange for the transport name to be logged as "**bypassed**". */
5617 if (Ustrcmp(addr->address, "/dev/null") == 0)
5619 uschar *save = addr->transport->name;
5620 addr->transport->name = US"**bypassed**";
5621 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
5622 addr->transport->name = save;
5623 continue; /* with the next new address */
5626 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
5629 DEBUG(D_deliver|D_route)
5630 debug_printf("queued for %s transport\n", addr->transport->name);
5631 addr->next = addr_local;
5633 continue; /* with the next new address */
5636 /* Handle normal addresses. First, split up into local part and domain,
5637 handling the %-hack if necessary. There is the possibility of a defer from
5638 a lookup in percent_hack_domains. */
5640 if ((rc = deliver_split_address(addr)) == DEFER)
5642 addr->message = US"cannot check percent_hack_domains";
5643 addr->basic_errno = ERRNO_LISTDEFER;
5644 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
5648 /* Check to see if the domain is held. If so, proceed only if the
5649 delivery was forced by hand. */
5651 deliver_domain = addr->domain; /* set $domain */
5652 if (!forced && hold_domains != NULL &&
5653 (rc = match_isinlist(addr->domain, &hold_domains, 0,
5654 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
5659 addr->message = US"hold_domains lookup deferred";
5660 addr->basic_errno = ERRNO_LISTDEFER;
5664 addr->message = US"domain is held";
5665 addr->basic_errno = ERRNO_HELD;
5667 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
5671 /* Now we can check for duplicates and previously delivered addresses. In
5672 order to do this, we have to generate a "unique" value for each address,
5673 because there may be identical actual addresses in a line of descendents.
5674 The "unique" field is initialized to the same value as the "address" field,
5675 but gets changed here to cope with identically-named descendents. */
5677 for (parent = addr->parent; parent != NULL; parent = parent->parent)
5678 if (strcmpic(addr->address, parent->address) == 0) break;
5680 /* If there's an ancestor with the same name, set the homonym flag. This
5681 influences how deliveries are recorded. Then add a prefix on the front of
5682 the unique address. We use \n\ where n starts at 0 and increases each time.
5683 It is unlikely to pass 9, but if it does, it may look odd but will still
5684 work. This means that siblings or cousins with the same names are treated
5685 as duplicates, which is what we want. */
5689 setflag(addr, af_homonym);
5690 if (parent->unique[0] != '\\')
5691 addr->unique = string_sprintf("\\0\\%s", addr->address);
5693 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
5697 /* Ensure that the domain in the unique field is lower cased, because
5698 domains are always handled caselessly. */
5700 p = Ustrrchr(addr->unique, '@');
5701 while (*p != 0) { *p = tolower(*p); p++; }
5703 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5705 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5707 DEBUG(D_deliver|D_route)
5708 debug_printf("%s was previously delivered: discarded\n", addr->unique);
5709 child_done(addr, tod_stamp(tod_log));
5713 /* Get the routing retry status, saving the two retry keys (with and
5714 without the local part) for subsequent use. If there is no retry record for
5715 the standard address routing retry key, we look for the same key with the
5716 sender attached, because this form is used by the smtp transport after a
5717 4xx response to RCPT when address_retry_include_sender is true. */
5719 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
5720 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
5723 if (dbm_file == NULL)
5724 domain_retry_record = address_retry_record = NULL;
5727 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
5728 if (domain_retry_record != NULL &&
5729 now - domain_retry_record->time_stamp > retry_data_expire)
5730 domain_retry_record = NULL; /* Ignore if too old */
5732 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
5733 if (address_retry_record != NULL &&
5734 now - address_retry_record->time_stamp > retry_data_expire)
5735 address_retry_record = NULL; /* Ignore if too old */
5737 if (address_retry_record == NULL)
5739 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
5741 address_retry_record = dbfn_read(dbm_file, altkey);
5742 if (address_retry_record != NULL &&
5743 now - address_retry_record->time_stamp > retry_data_expire)
5744 address_retry_record = NULL; /* Ignore if too old */
5748 DEBUG(D_deliver|D_retry)
5750 if (domain_retry_record == NULL)
5751 debug_printf("no domain retry record\n");
5752 if (address_retry_record == NULL)
5753 debug_printf("no address retry record\n");
5756 /* If we are sending a message down an existing SMTP connection, we must
5757 assume that the message which created the connection managed to route
5758 an address to that connection. We do not want to run the risk of taking
5759 a long time over routing here, because if we do, the server at the other
5760 end of the connection may time it out. This is especially true for messages
5761 with lots of addresses. For this kind of delivery, queue_running is not
5762 set, so we would normally route all addresses. We take a pragmatic approach
5763 and defer routing any addresses that have any kind of domain retry record.
5764 That is, we don't even look at their retry times. It doesn't matter if this
5765 doesn't work occasionally. This is all just an optimization, after all.
5767 The reason for not doing the same for address retries is that they normally
5768 arise from 4xx responses, not DNS timeouts. */
5770 if (continue_hostname != NULL && domain_retry_record != NULL)
5772 addr->message = US"reusing SMTP connection skips previous routing defer";
5773 addr->basic_errno = ERRNO_RRETRY;
5774 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5777 /* If we are in a queue run, defer routing unless there is no retry data or
5778 we've passed the next retry time, or this message is forced. In other
5779 words, ignore retry data when not in a queue run.
5781 However, if the domain retry time has expired, always allow the routing
5782 attempt. If it fails again, the address will be failed. This ensures that
5783 each address is routed at least once, even after long-term routing
5786 If there is an address retry, check that too; just wait for the next
5787 retry time. This helps with the case when the temporary error on the
5788 address was really message-specific rather than address specific, since
5789 it allows other messages through.
5791 We also wait for the next retry time if this is a message sent down an
5792 existing SMTP connection (even though that will be forced). Otherwise there
5793 will be far too many attempts for an address that gets a 4xx error. In
5794 fact, after such an error, we should not get here because, the host should
5795 not be remembered as one this message needs. However, there was a bug that
5796 used to cause this to happen, so it is best to be on the safe side.
5798 Even if we haven't reached the retry time in the hints, there is one more
5799 check to do, which is for the ultimate address timeout. We only do this
5800 check if there is an address retry record and there is not a domain retry
5801 record; this implies that previous attempts to handle the address had the
5802 retry_use_local_parts option turned on. We use this as an approximation
5803 for the destination being like a local delivery, for example delivery over
5804 LMTP to an IMAP message store. In this situation users are liable to bump
5805 into their quota and thereby have intermittently successful deliveries,
5806 which keep the retry record fresh, which can lead to us perpetually
5807 deferring messages. */
5809 else if (((queue_running && !deliver_force) || continue_hostname != NULL)
5811 ((domain_retry_record != NULL &&
5812 now < domain_retry_record->next_try &&
5813 !domain_retry_record->expired)
5815 (address_retry_record != NULL &&
5816 now < address_retry_record->next_try))
5818 (domain_retry_record != NULL ||
5819 address_retry_record == NULL ||
5820 !retry_ultimate_address_timeout(addr->address_retry_key,
5821 addr->domain, address_retry_record, now)))
5823 addr->message = US"retry time not reached";
5824 addr->basic_errno = ERRNO_RRETRY;
5825 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5828 /* The domain is OK for routing. Remember if retry data exists so it
5829 can be cleaned up after a successful delivery. */
5833 if (domain_retry_record != NULL || address_retry_record != NULL)
5834 setflag(addr, af_dr_retry_exists);
5835 addr->next = addr_route;
5837 DEBUG(D_deliver|D_route)
5838 debug_printf("%s: queued for routing\n", addr->address);
5842 /* The database is closed while routing is actually happening. Requests to
5843 update it are put on a chain and all processed together at the end. */
5845 if (dbm_file != NULL) dbfn_close(dbm_file);
5847 /* If queue_domains is set, we don't even want to try routing addresses in
5848 those domains. During queue runs, queue_domains is forced to be unset.
5849 Optimize by skipping this pass through the addresses if nothing is set. */
5851 if (!deliver_force && queue_domains != NULL)
5853 address_item *okaddr = NULL;
5854 while (addr_route != NULL)
5856 address_item *addr = addr_route;
5857 addr_route = addr->next;
5859 deliver_domain = addr->domain; /* set $domain */
5860 if ((rc = match_isinlist(addr->domain, &queue_domains, 0,
5861 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
5866 addr->basic_errno = ERRNO_LISTDEFER;
5867 addr->message = US"queue_domains lookup deferred";
5868 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5872 addr->next = okaddr;
5878 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
5879 addr->message = US"domain is in queue_domains";
5880 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5884 addr_route = okaddr;
5887 /* Now route those addresses that are not deferred. */
5889 while (addr_route != NULL)
5892 address_item *addr = addr_route;
5893 uschar *old_domain = addr->domain;
5894 uschar *old_unique = addr->unique;
5895 addr_route = addr->next;
5898 /* Just in case some router parameter refers to it. */
5900 return_path = (addr->p.errors_address != NULL)?
5901 addr->p.errors_address : sender_address;
5903 /* If a router defers an address, add a retry item. Whether or not to
5904 use the local part in the key is a property of the router. */
5906 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
5907 &addr_succeed, v_none)) == DEFER)
5908 retry_add_item(addr, (addr->router->retry_use_local_part)?
5909 string_sprintf("R:%s@%s", addr->local_part, addr->domain) :
5910 string_sprintf("R:%s", addr->domain), 0);
5912 /* Otherwise, if there is an existing retry record in the database, add
5913 retry items to delete both forms. We must also allow for the possibility
5914 of a routing retry that includes the sender address. Since the domain might
5915 have been rewritten (expanded to fully qualified) as a result of routing,
5916 ensure that the rewritten form is also deleted. */
5918 else if (testflag(addr, af_dr_retry_exists))
5920 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
5922 retry_add_item(addr, altkey, rf_delete);
5923 retry_add_item(addr, addr->address_retry_key, rf_delete);
5924 retry_add_item(addr, addr->domain_retry_key, rf_delete);
5925 if (Ustrcmp(addr->domain, old_domain) != 0)
5926 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
5929 /* DISCARD is given for :blackhole: and "seen finish". The event has been
5930 logged, but we need to ensure the address (and maybe parents) is marked
5935 address_done(addr, tod_stamp(tod_log));
5936 continue; /* route next address */
5939 /* The address is finished with (failed or deferred). */
5943 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
5944 continue; /* route next address */
5947 /* The address has been routed. If the router changed the domain, it will
5948 also have changed the unique address. We have to test whether this address
5949 has already been delivered, because it's the unique address that finally
5952 if (addr->unique != old_unique &&
5953 tree_search(tree_nonrecipients, addr->unique) != 0)
5955 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
5956 "discarded\n", addr->address);
5957 if (addr_remote == addr) addr_remote = addr->next;
5958 else if (addr_local == addr) addr_local = addr->next;
5961 /* If the router has same_domain_copy_routing set, we are permitted to copy
5962 the routing for any other addresses with the same domain. This is an
5963 optimisation to save repeated DNS lookups for "standard" remote domain
5964 routing. The option is settable only on routers that generate host lists.
5965 We play it very safe, and do the optimization only if the address is routed
5966 to a remote transport, there are no header changes, and the domain was not
5967 modified by the router. */
5969 if (addr_remote == addr &&
5970 addr->router->same_domain_copy_routing &&
5971 addr->p.extra_headers == NULL &&
5972 addr->p.remove_headers == NULL &&
5973 old_domain == addr->domain)
5975 address_item **chain = &addr_route;
5976 while (*chain != NULL)
5978 address_item *addr2 = *chain;
5979 if (Ustrcmp(addr2->domain, addr->domain) != 0)
5981 chain = &(addr2->next);
5985 /* Found a suitable address; take it off the routing list and add it to
5986 the remote delivery list. */
5988 *chain = addr2->next;
5989 addr2->next = addr_remote;
5990 addr_remote = addr2;
5992 /* Copy the routing data */
5994 addr2->domain = addr->domain;
5995 addr2->router = addr->router;
5996 addr2->transport = addr->transport;
5997 addr2->host_list = addr->host_list;
5998 addr2->fallback_hosts = addr->fallback_hosts;
5999 addr2->p.errors_address = addr->p.errors_address;
6000 copyflag(addr2, addr, af_hide_child | af_local_host_removed);
6002 DEBUG(D_deliver|D_route)
6004 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6006 "Routing for %s copied from %s\n",
6007 addr2->address, addr2->address, addr->address);
6011 } /* Continue with routing the next address. */
6012 } /* Loop to process any child addresses that the routers created, and
6013 any rerouted addresses that got put back on the new chain. */
6016 /* Debugging: show the results of the routing */
6018 DEBUG(D_deliver|D_retry|D_route)
6020 address_item *p = addr_local;
6021 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6022 debug_printf("After routing:\n Local deliveries:\n");
6025 debug_printf(" %s\n", p->address);
6030 debug_printf(" Remote deliveries:\n");
6033 debug_printf(" %s\n", p->address);
6038 debug_printf(" Failed addresses:\n");
6041 debug_printf(" %s\n", p->address);
6046 debug_printf(" Deferred addresses:\n");
6049 debug_printf(" %s\n", p->address);
6054 /* Free any resources that were cached during routing. */
6059 /* These two variables are set only during routing, after check_local_user.
6060 Ensure they are not set in transports. */
6062 local_user_gid = (gid_t)(-1);
6063 local_user_uid = (uid_t)(-1);
6065 /* Check for any duplicate addresses. This check is delayed until after
6066 routing, because the flexibility of the routing configuration means that
6067 identical addresses with different parentage may end up being redirected to
6068 different addresses. Checking for duplicates too early (as we previously used
6069 to) makes this kind of thing not work. */
6071 do_duplicate_check(&addr_local);
6072 do_duplicate_check(&addr_remote);
6074 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
6075 remote transport. The check that they all end up in one transaction happens in
6076 the do_remote_deliveries() function. */
6078 if (mua_wrapper && (addr_local != NULL || addr_failed != NULL ||
6079 addr_defer != NULL))
6082 uschar *which, *colon, *msg;
6084 if (addr_local != NULL)
6089 else if (addr_defer != NULL)
6092 which = US"deferred";
6100 while (addr->parent != NULL) addr = addr->parent;
6102 if (addr->message != NULL)
6105 msg = addr->message;
6107 else colon = msg = US"";
6109 /* We don't need to log here for a forced failure as it will already
6110 have been logged. Defer will also have been logged, but as a defer, so we do
6111 need to do the failure logging. */
6113 if (addr != addr_failed)
6114 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
6115 addr->address, which);
6117 /* Always write an error to the caller */
6119 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
6122 final_yield = DELIVER_MUA_FAILED;
6123 addr_failed = addr_defer = NULL; /* So that we remove the message */
6124 goto DELIVERY_TIDYUP;
6128 /* If this is a run to continue deliveries to an external channel that is
6129 already set up, defer any local deliveries. */
6131 if (continue_transport != NULL)
6133 if (addr_defer == NULL) addr_defer = addr_local; else
6135 address_item *addr = addr_defer;
6136 while (addr->next != NULL) addr = addr->next;
6137 addr->next = addr_local;
6143 /* Because address rewriting can happen in the routers, we should not really do
6144 ANY deliveries until all addresses have been routed, so that all recipients of
6145 the message get the same headers. However, this is in practice not always
6146 possible, since sometimes remote addresses give DNS timeouts for days on end.
6147 The pragmatic approach is to deliver what we can now, saving any rewritten
6148 headers so that at least the next lot of recipients benefit from the rewriting
6149 that has already been done.
6151 If any headers have been rewritten during routing, update the spool file to
6152 remember them for all subsequent deliveries. This can be delayed till later if
6153 there is only address to be delivered - if it succeeds the spool write need not
6156 if (header_rewritten &&
6157 ((addr_local != NULL &&
6158 (addr_local->next != NULL || addr_remote != NULL)) ||
6159 (addr_remote != NULL && addr_remote->next != NULL)))
6161 /* Panic-dies on error */
6162 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6163 header_rewritten = FALSE;
6167 /* If there are any deliveries to be done, open the journal file. This is used
6168 to record successful deliveries as soon as possible after each delivery is
6169 known to be complete. A file opened with O_APPEND is used so that several
6170 processes can run simultaneously.
6172 The journal is just insurance against crashes. When the spool file is
6173 ultimately updated at the end of processing, the journal is deleted. If a
6174 journal is found to exist at the start of delivery, the addresses listed
6175 therein are added to the non-recipients. */
6177 if (addr_local != NULL || addr_remote != NULL)
6179 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
6180 journal_fd = Uopen(spoolname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE);
6184 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
6185 spoolname, strerror(errno));
6186 return DELIVER_NOT_ATTEMPTED;
6189 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
6190 that the mode is correct - the group setting doesn't always seem to get
6191 set automatically. */
6193 if( fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
6194 || fchown(journal_fd, exim_uid, exim_gid)
6195 || fchmod(journal_fd, SPOOL_MODE)
6198 int ret = Uunlink(spoolname);
6199 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
6200 spoolname, strerror(errno));
6201 if(ret && errno != ENOENT)
6202 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6203 spoolname, strerror(errno));
6204 return DELIVER_NOT_ATTEMPTED;
6210 /* Now we can get down to the business of actually doing deliveries. Local
6211 deliveries are done first, then remote ones. If ever the problems of how to
6212 handle fallback transports are figured out, this section can be put into a loop
6213 for handling fallbacks, though the uid switching will have to be revised. */
6215 /* Precompile a regex that is used to recognize a parameter in response
6216 to an LHLO command, if is isn't already compiled. This may be used on both
6217 local and remote LMTP deliveries. */
6219 if (regex_IGNOREQUOTA == NULL) regex_IGNOREQUOTA =
6220 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
6222 /* Handle local deliveries */
6224 if (addr_local != NULL)
6226 DEBUG(D_deliver|D_transport)
6227 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
6228 do_local_deliveries();
6229 disable_logging = FALSE;
6232 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
6233 so just queue them all. */
6235 if (queue_run_local)
6237 while (addr_remote != NULL)
6239 address_item *addr = addr_remote;
6240 addr_remote = addr->next;
6242 addr->basic_errno = ERRNO_LOCAL_ONLY;
6243 addr->message = US"remote deliveries suppressed";
6244 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
6248 /* Handle remote deliveries */
6250 if (addr_remote != NULL)
6252 DEBUG(D_deliver|D_transport)
6253 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
6255 /* Precompile some regex that are used to recognize parameters in response
6256 to an EHLO command, if they aren't already compiled. */
6258 if (regex_PIPELINING == NULL) regex_PIPELINING =
6259 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
6261 if (regex_SIZE == NULL) regex_SIZE =
6262 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
6264 if (regex_AUTH == NULL) regex_AUTH =
6265 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
6269 if (regex_STARTTLS == NULL) regex_STARTTLS =
6270 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
6273 #ifdef EXPERIMENTAL_PRDR
6274 if (regex_PRDR == NULL) regex_PRDR =
6275 regex_must_compile(US"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE, TRUE);
6278 /* Now sort the addresses if required, and do the deliveries. The yield of
6279 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
6280 cannot be delivered in one transaction. */
6282 if (remote_sort_domains != NULL) sort_remote_deliveries();
6283 if (!do_remote_deliveries(FALSE))
6285 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
6286 "be delivered in one transaction");
6287 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
6289 final_yield = DELIVER_MUA_FAILED;
6290 addr_failed = addr_defer = NULL; /* So that we remove the message */
6291 goto DELIVERY_TIDYUP;
6294 /* See if any of the addresses that failed got put on the queue for delivery
6295 to their fallback hosts. We do it this way because often the same fallback
6296 host is used for many domains, so all can be sent in a single transaction
6297 (if appropriately configured). */
6299 if (addr_fallback != NULL && !mua_wrapper)
6301 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
6302 addr_remote = addr_fallback;
6303 addr_fallback = NULL;
6304 if (remote_sort_domains != NULL) sort_remote_deliveries();
6305 do_remote_deliveries(TRUE);
6307 disable_logging = FALSE;
6311 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6312 phase, to minimize cases of half-done things. */
6315 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6317 /* Root privilege is no longer needed */
6319 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
6321 set_process_info("tidying up after delivering %s", message_id);
6322 signal(SIGTERM, SIG_IGN);
6324 /* When we are acting as an MUA wrapper, the smtp transport will either have
6325 succeeded for all addresses, or failed them all in normal cases. However, there
6326 are some setup situations (e.g. when a named port does not exist) that cause an
6327 immediate exit with deferral of all addresses. Convert those into failures. We
6328 do not ever want to retry, nor do we want to send a bounce message. */
6332 if (addr_defer != NULL)
6334 address_item *addr, *nextaddr;
6335 for (addr = addr_defer; addr != NULL; addr = nextaddr)
6337 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
6338 "delivery", addr->address);
6339 nextaddr = addr->next;
6340 addr->next = addr_failed;
6346 /* Now all should either have succeeded or failed. */
6348 if (addr_failed == NULL) final_yield = DELIVER_MUA_SUCCEEDED; else
6350 uschar *s = (addr_failed->user_message != NULL)?
6351 addr_failed->user_message : addr_failed->message;
6353 fprintf(stderr, "Delivery failed: ");
6354 if (addr_failed->basic_errno > 0)
6356 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
6357 if (s != NULL) fprintf(stderr, ": ");
6361 if (addr_failed->basic_errno <= 0) fprintf(stderr, "unknown error");
6363 else fprintf(stderr, "%s", CS s);
6364 fprintf(stderr, "\n");
6366 final_yield = DELIVER_MUA_FAILED;
6371 /* In a normal configuration, we now update the retry database. This is done in
6372 one fell swoop at the end in order not to keep opening and closing (and
6373 locking) the database. The code for handling retries is hived off into a
6374 separate module for convenience. We pass it the addresses of the various
6375 chains, because deferred addresses can get moved onto the failed chain if the
6376 retry cutoff time has expired for all alternative destinations. Bypass the
6377 updating of the database if the -N flag is set, which is a debugging thing that
6378 prevents actual delivery. */
6380 else if (!dont_deliver) retry_update(&addr_defer, &addr_failed, &addr_succeed);
6382 /* If any addresses failed, we must send a message to somebody, unless
6383 af_ignore_error is set, in which case no action is taken. It is possible for
6384 several messages to get sent if there are addresses with different
6387 while (addr_failed != NULL)
6391 uschar *logtod = tod_stamp(tod_log);
6393 address_item *handled_addr = NULL;
6394 address_item **paddr;
6395 address_item *msgchain = NULL;
6396 address_item **pmsgchain = &msgchain;
6398 /* There are weird cases when logging is disabled in the transport. However,
6399 there may not be a transport (address failed by a router). */
6401 disable_logging = FALSE;
6402 if (addr_failed->transport != NULL)
6403 disable_logging = addr_failed->transport->disable_logging;
6406 debug_printf("processing failed address %s\n", addr_failed->address);
6408 /* There are only two ways an address in a bounce message can get here:
6410 (1) When delivery was initially deferred, but has now timed out (in the call
6411 to retry_update() above). We can detect this by testing for
6412 af_retry_timedout. If the address does not have its own errors address,
6413 we arrange to ignore the error.
6415 (2) If delivery failures for bounce messages are being ignored. We can detect
6416 this by testing for af_ignore_error. This will also be set if a bounce
6417 message has been autothawed and the ignore_bounce_errors_after time has
6418 passed. It might also be set if a router was explicitly configured to
6419 ignore errors (errors_to = "").
6421 If neither of these cases obtains, something has gone wrong. Log the
6422 incident, but then ignore the error. */
6424 if (sender_address[0] == 0 && addr_failed->p.errors_address == NULL)
6426 if (!testflag(addr_failed, af_retry_timedout) &&
6427 !testflag(addr_failed, af_ignore_error))
6429 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
6430 "failure is neither frozen nor ignored (it's been ignored)");
6432 setflag(addr_failed, af_ignore_error);
6435 /* If the first address on the list has af_ignore_error set, just remove
6436 it from the list, throw away any saved message file, log it, and
6437 mark the recipient done. */
6439 if (testflag(addr_failed, af_ignore_error))
6442 addr_failed = addr->next;
6443 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
6445 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
6447 (addr->parent == NULL)? US"" : US" <",
6448 (addr->parent == NULL)? US"" : addr->parent->address,
6449 (addr->parent == NULL)? US"" : US">");
6451 address_done(addr, logtod);
6452 child_done(addr, logtod);
6453 /* Panic-dies on error */
6454 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6457 /* Otherwise, handle the sending of a message. Find the error address for
6458 the first address, then send a message that includes all failed addresses
6459 that have the same error address. Note the bounce_recipient is a global so
6460 that it can be accesssed by $bounce_recipient while creating a customized
6465 bounce_recipient = (addr_failed->p.errors_address == NULL)?
6466 sender_address : addr_failed->p.errors_address;
6468 /* Make a subprocess to send a message */
6470 pid = child_open_exim(&fd);
6472 /* Creation of child failed */
6475 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6476 "create child process to send failure message: %s", getpid(),
6477 getppid(), strerror(errno));
6479 /* Creation of child succeeded */
6486 uschar *bcc, *emf_text;
6487 FILE *f = fdopen(fd, "wb");
6489 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
6490 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
6491 DELIVER_IN_BUFFER_SIZE;
6494 debug_printf("sending error message to: %s\n", bounce_recipient);
6496 /* Scan the addresses for all that have the same errors address, removing
6497 them from the addr_failed chain, and putting them on msgchain. */
6499 paddr = &addr_failed;
6500 for (addr = addr_failed; addr != NULL; addr = *paddr)
6502 if (Ustrcmp(bounce_recipient, (addr->p.errors_address == NULL)?
6503 sender_address : addr->p.errors_address) != 0)
6505 paddr = &(addr->next); /* Not the same; skip */
6507 else /* The same - dechain */
6509 *paddr = addr->next;
6512 pmsgchain = &(addr->next);
6516 /* Include X-Failed-Recipients: for automatic interpretation, but do
6517 not let any one header line get too long. We do this by starting a
6518 new header every 50 recipients. Omit any addresses for which the
6519 "hide_child" flag is set. */
6521 for (addr = msgchain; addr != NULL; addr = addr->next)
6523 if (testflag(addr, af_hide_child)) continue;
6530 (rcount++ == 0)? "X-Failed-Recipients: " : ",\n ",
6531 (testflag(addr, af_pfr) && addr->parent != NULL)?
6532 string_printing(addr->parent->address) :
6533 string_printing(addr->address));
6535 if (rcount > 0) fprintf(f, "\n");
6537 /* Output the standard headers */
6539 if (errors_reply_to != NULL)
6540 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6541 fprintf(f, "Auto-Submitted: auto-replied\n");
6543 fprintf(f, "To: %s\n", bounce_recipient);
6545 /* Open a template file if one is provided. Log failure to open, but
6546 carry on - default texts will be used. */
6548 if (bounce_message_file != NULL)
6550 emf = Ufopen(bounce_message_file, "rb");
6552 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
6553 "message texts: %s", bounce_message_file, strerror(errno));
6556 /* Quietly copy to configured additional addresses if required. */
6558 bcc = moan_check_errorcopy(bounce_recipient);
6559 if (bcc != NULL) fprintf(f, "Bcc: %s\n", bcc);
6561 /* The texts for the message can be read from a template file; if there
6562 isn't one, or if it is too short, built-in texts are used. The first
6563 emf text is a Subject: and any other headers. */
6565 emf_text = next_emf(emf, US"header");
6566 if (emf_text != NULL) fprintf(f, "%s\n", emf_text); else
6568 fprintf(f, "Subject: Mail delivery failed%s\n\n",
6569 to_sender? ": returning message to sender" : "");
6572 emf_text = next_emf(emf, US"intro");
6573 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6576 /* This message has been reworded several times. It seems to be confusing to
6577 somebody, however it is worded. I have retreated to the original, simple
6579 "This message was created automatically by mail delivery software.\n");
6580 if (bounce_message_text != NULL) fprintf(f, "%s", CS bounce_message_text);
6584 "\nA message that you sent could not be delivered to one or more of its\n"
6585 "recipients. This is a permanent error. The following address(es) failed:\n");
6590 "\nA message sent by\n\n <%s>\n\n"
6591 "could not be delivered to one or more of its recipients. The following\n"
6592 "address(es) failed:\n", sender_address);
6597 /* Process the addresses, leaving them on the msgchain if they have a
6598 file name for a return message. (There has already been a check in
6599 post_process_one() for the existence of data in the message file.) A TRUE
6600 return from print_address_information() means that the address is not
6604 for (addr = msgchain; addr != NULL; addr = *paddr)
6606 if (print_address_information(addr, f, US" ", US"\n ", US""))
6607 print_address_error(addr, f, US"");
6609 /* End the final line for the address */
6613 /* Leave on msgchain if there's a return file. */
6615 if (addr->return_file >= 0)
6617 paddr = &(addr->next);
6621 /* Else save so that we can tick off the recipient when the
6626 *paddr = addr->next;
6627 addr->next = handled_addr;
6628 handled_addr = addr;
6634 /* Get the next text, whether we need it or not, so as to be
6635 positioned for the one after. */
6637 emf_text = next_emf(emf, US"generated text");
6639 /* If there were any file messages passed by the local transports,
6640 include them in the message. Then put the address on the handled chain.
6641 In the case of a batch of addresses that were all sent to the same
6642 transport, the return_file field in all of them will contain the same
6643 fd, and the return_filename field in the *last* one will be set (to the
6644 name of the file). */
6646 if (msgchain != NULL)
6648 address_item *nextaddr;
6650 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6652 "The following text was generated during the delivery "
6653 "attempt%s:\n", (filecount > 1)? "s" : "");
6655 for (addr = msgchain; addr != NULL; addr = nextaddr)
6658 address_item *topaddr = addr;
6660 /* List all the addresses that relate to this file */
6663 while(addr != NULL) /* Insurance */
6665 print_address_information(addr, f, US"------ ", US"\n ",
6667 if (addr->return_filename != NULL) break;
6672 /* Now copy the file */
6674 fm = Ufopen(addr->return_filename, "rb");
6677 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
6681 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
6684 Uunlink(addr->return_filename);
6686 /* Can now add to handled chain, first fishing off the next
6687 address on the msgchain. */
6689 nextaddr = addr->next;
6690 addr->next = handled_addr;
6691 handled_addr = topaddr;
6696 /* Now copy the message, trying to give an intelligible comment if
6697 it is too long for it all to be copied. The limit isn't strictly
6698 applied because of the buffering. There is, however, an option
6699 to suppress copying altogether. */
6701 emf_text = next_emf(emf, US"copy");
6703 if (bounce_return_message)
6705 int topt = topt_add_return_path;
6706 if (!bounce_return_body) topt |= topt_no_body;
6708 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6710 if (bounce_return_body) fprintf(f,
6711 "------ This is a copy of the message, including all the headers. ------\n");
6713 "------ This is a copy of the message's headers. ------\n");
6716 /* While reading the "truncated" message, set return_size_limit to
6717 the actual max testing value, rounded. We need to read the message
6718 whether we are going to use it or not. */
6721 int temp = bounce_return_size_limit;
6722 bounce_return_size_limit = (max/1000)*1000;
6723 emf_text = next_emf(emf, US"truncated");
6724 bounce_return_size_limit = temp;
6727 if (bounce_return_body && bounce_return_size_limit > 0)
6729 struct stat statbuf;
6730 if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max)
6732 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6735 "------ The body of the message is " OFF_T_FMT " characters long; only the first\n"
6736 "------ %d or so are included here.\n", statbuf.st_size, max);
6743 transport_filter_argv = NULL; /* Just in case */
6744 return_path = sender_address; /* In case not previously set */
6745 transport_write_message(NULL, fileno(f), topt,
6746 bounce_return_size_limit, NULL, NULL, NULL, NULL, NULL, 0);
6749 /* Write final text and close the template file if one is open */
6753 emf_text = next_emf(emf, US"final");
6754 if (emf_text != NULL) fprintf(f, "%s", CS emf_text);
6758 /* Close the file, which should send an EOF to the child process
6759 that is receiving the message. Wait for it to finish. */
6762 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
6764 /* In the test harness, let the child do it's thing first. */
6766 if (running_in_test_harness) millisleep(500);
6768 /* If the process failed, there was some disaster in setting up the
6769 error message. Unless the message is very old, ensure that addr_defer
6770 is non-null, which will have the effect of leaving the message on the
6771 spool. The failed addresses will get tried again next time. However, we
6772 don't really want this to happen too often, so freeze the message unless
6773 there are some genuine deferred addresses to try. To do this we have
6774 to call spool_write_header() here, because with no genuine deferred
6775 addresses the normal code below doesn't get run. */
6780 if (now - received_time < retry_maximum_timeout && addr_defer == NULL)
6782 addr_defer = (address_item *)(+1);
6783 deliver_freeze = TRUE;
6784 deliver_frozen_at = time(NULL);
6785 /* Panic-dies on error */
6786 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6789 deliver_msglog("Process failed (%d) when writing error message "
6790 "to %s%s", rc, bounce_recipient, s);
6791 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
6792 "to %s%s", rc, bounce_recipient, s);
6795 /* The message succeeded. Ensure that the recipients that failed are
6796 now marked finished with on the spool and their parents updated. */
6800 for (addr = handled_addr; addr != NULL; addr = addr->next)
6802 address_done(addr, logtod);
6803 child_done(addr, logtod);
6805 /* Panic-dies on error */
6806 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6812 disable_logging = FALSE; /* In case left set */
6814 /* Come here from the mua_wrapper case if routing goes wrong */
6818 /* If there are now no deferred addresses, we are done. Preserve the
6819 message log if so configured, and we are using them. Otherwise, sling it.
6820 Then delete the message itself. */
6822 if (addr_defer == NULL)
6826 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir,
6828 if (preserve_message_logs)
6831 sprintf(CS big_buffer, "%s/msglog.OLD/%s", spool_directory, id);
6832 if ((rc = Urename(spoolname, big_buffer)) < 0)
6834 (void)directory_make(spool_directory, US"msglog.OLD",
6835 MSGLOG_DIRECTORY_MODE, TRUE);
6836 rc = Urename(spoolname, big_buffer);
6839 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
6840 "msglog.OLD directory", spoolname);
6844 if (Uunlink(spoolname) < 0)
6845 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6846 spoolname, strerror(errno));
6850 /* Remove the two message files. */
6852 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
6853 if (Uunlink(spoolname) < 0)
6854 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6855 spoolname, strerror(errno));
6856 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
6857 if (Uunlink(spoolname) < 0)
6858 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6859 spoolname, strerror(errno));
6861 /* Log the end of this message, with queue time if requested. */
6863 if ((log_extra_selector & LX_queue_time_overall) != 0)
6864 log_write(0, LOG_MAIN, "Completed QT=%s",
6865 readconf_printtime(time(NULL) - received_time));
6867 log_write(0, LOG_MAIN, "Completed");
6869 /* Unset deliver_freeze so that we won't try to move the spool files further down */
6870 deliver_freeze = FALSE;
6873 /* If there are deferred addresses, we are keeping this message because it is
6874 not yet completed. Lose any temporary files that were catching output from
6875 pipes for any of the deferred addresses, handle one-time aliases, and see if
6876 the message has been on the queue for so long that it is time to send a warning
6877 message to the sender, unless it is a mailer-daemon. If all deferred addresses
6878 have the same domain, we can set deliver_domain for the expansion of
6879 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
6880 the parent's domain.
6882 If all the deferred addresses have an error number that indicates "retry time
6883 not reached", skip sending the warning message, because it won't contain the
6884 reason for the delay. It will get sent at the next real delivery attempt.
6885 However, if at least one address has tried, we'd better include all of them in
6888 If we can't make a process to send the message, don't worry.
6890 For mailing list expansions we want to send the warning message to the
6891 mailing list manager. We can't do a perfect job here, as some addresses may
6892 have different errors addresses, but if we take the errors address from
6893 each deferred address it will probably be right in most cases.
6895 If addr_defer == +1, it means there was a problem sending an error message
6896 for failed addresses, and there were no "real" deferred addresses. The value
6897 was set just to keep the message on the spool, so there is nothing to do here.
6900 else if (addr_defer != (address_item *)(+1))
6903 uschar *recipients = US"";
6904 BOOL delivery_attempted = FALSE;
6906 deliver_domain = testflag(addr_defer, af_pfr)?
6907 addr_defer->parent->domain : addr_defer->domain;
6909 for (addr = addr_defer; addr != NULL; addr = addr->next)
6911 address_item *otaddr;
6913 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
6915 if (deliver_domain != NULL)
6917 uschar *d = (testflag(addr, af_pfr))? addr->parent->domain : addr->domain;
6919 /* The domain may be unset for an address that has never been routed
6920 because the system filter froze the message. */
6922 if (d == NULL || Ustrcmp(d, deliver_domain) != 0) deliver_domain = NULL;
6925 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
6927 /* Handle the case of one-time aliases. If any address in the ancestry
6928 of this one is flagged, ensure it is in the recipients list, suitably
6929 flagged, and that its parent is marked delivered. */
6931 for (otaddr = addr; otaddr != NULL; otaddr = otaddr->parent)
6932 if (otaddr->onetime_parent != NULL) break;
6937 int t = recipients_count;
6939 for (i = 0; i < recipients_count; i++)
6941 uschar *r = recipients_list[i].address;
6942 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
6943 if (Ustrcmp(otaddr->address, r) == 0) break;
6946 /* Didn't find the address already in the list, and did find the
6947 ultimate parent's address in the list. After adding the recipient,
6948 update the errors address in the recipients list. */
6950 if (i >= recipients_count && t < recipients_count)
6952 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
6953 otaddr->address, otaddr->parent->address);
6954 receive_add_recipient(otaddr->address, t);
6955 recipients_list[recipients_count-1].errors_to = otaddr->p.errors_address;
6956 tree_add_nonrecipient(otaddr->parent->address);
6957 update_spool = TRUE;
6961 /* Except for error messages, ensure that either the errors address for
6962 this deferred address or, if there is none, the sender address, is on the
6963 list of recipients for a warning message. */
6965 if (sender_address[0] != 0)
6967 if (addr->p.errors_address == NULL)
6969 if (Ustrstr(recipients, sender_address) == NULL)
6970 recipients = string_sprintf("%s%s%s", recipients,
6971 (recipients[0] == 0)? "" : ",", sender_address);
6975 if (Ustrstr(recipients, addr->p.errors_address) == NULL)
6976 recipients = string_sprintf("%s%s%s", recipients,
6977 (recipients[0] == 0)? "" : ",", addr->p.errors_address);
6982 /* Send a warning message if the conditions are right. If the condition check
6983 fails because of a lookup defer, there is nothing we can do. The warning
6984 is not sent. Another attempt will be made at the next delivery attempt (if
6987 if (!queue_2stage && delivery_attempted &&
6988 delay_warning[1] > 0 && sender_address[0] != 0 &&
6989 (delay_warning_condition == NULL ||
6990 expand_check_condition(delay_warning_condition,
6991 US"delay_warning", US"option")))
6995 int queue_time = time(NULL) - received_time;
6997 /* When running in the test harness, there's an option that allows us to
6998 fudge this time so as to get repeatability of the tests. Take the first
6999 time off the list. In queue runs, the list pointer gets updated in the
7002 if (running_in_test_harness && fudged_queue_times[0] != 0)
7004 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
7007 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
7008 fudged_queue_times);
7013 /* See how many warnings we should have sent by now */
7015 for (count = 0; count < delay_warning[1]; count++)
7016 if (queue_time < delay_warning[count+2]) break;
7018 show_time = delay_warning[count+1];
7020 if (count >= delay_warning[1])
7023 int last_gap = show_time;
7024 if (count > 1) last_gap -= delay_warning[count];
7025 extra = (queue_time - delay_warning[count+1])/last_gap;
7026 show_time += last_gap * extra;
7032 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
7033 debug_printf("warning counts: required %d done %d\n", count,
7037 /* We have computed the number of warnings there should have been by now.
7038 If there haven't been enough, send one, and up the count to what it should
7041 if (warning_count < count)
7045 pid_t pid = child_open_exim(&fd);
7051 FILE *f = fdopen(fd, "wb");
7053 if (warn_message_file != NULL)
7055 wmf = Ufopen(warn_message_file, "rb");
7057 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
7058 "message texts: %s", warn_message_file, strerror(errno));
7061 warnmsg_recipients = recipients;
7062 warnmsg_delay = (queue_time < 120*60)?
7063 string_sprintf("%d minutes", show_time/60):
7064 string_sprintf("%d hours", show_time/3600);
7066 if (errors_reply_to != NULL)
7067 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7068 fprintf(f, "Auto-Submitted: auto-replied\n");
7070 fprintf(f, "To: %s\n", recipients);
7072 wmf_text = next_emf(wmf, US"header");
7073 if (wmf_text != NULL)
7074 fprintf(f, "%s\n", wmf_text);
7076 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
7077 message_id, warnmsg_delay);
7079 wmf_text = next_emf(wmf, US"intro");
7080 if (wmf_text != NULL) fprintf(f, "%s", CS wmf_text); else
7083 "This message was created automatically by mail delivery software.\n");
7085 if (Ustrcmp(recipients, sender_address) == 0)
7087 "A message that you sent has not yet been delivered to one or more of its\n"
7088 "recipients after more than ");
7091 "A message sent by\n\n <%s>\n\n"
7092 "has not yet been delivered to one or more of its recipients after more than \n",
7095 fprintf(f, "%s on the queue on %s.\n\n", warnmsg_delay,
7097 fprintf(f, "The message identifier is: %s\n", message_id);
7099 for (h = header_list; h != NULL; h = h->next)
7101 if (strncmpic(h->text, US"Subject:", 8) == 0)
7102 fprintf(f, "The subject of the message is: %s", h->text + 9);
7103 else if (strncmpic(h->text, US"Date:", 5) == 0)
7104 fprintf(f, "The date of the message is: %s", h->text + 6);
7108 fprintf(f, "The address%s to which the message has not yet been "
7110 (addr_defer->next == NULL)? "" : "es",
7111 (addr_defer->next == NULL)? "is": "are");
7114 /* List the addresses, with error information if allowed */
7117 while (addr_defer != NULL)
7119 address_item *addr = addr_defer;
7120 addr_defer = addr->next;
7121 if (print_address_information(addr, f, US" ", US"\n ", US""))
7122 print_address_error(addr, f, US"Delay reason: ");
7131 wmf_text = next_emf(wmf, US"final");
7132 if (wmf_text != NULL) fprintf(f, "%s", CS wmf_text);
7138 "No action is required on your part. Delivery attempts will continue for\n"
7139 "some time, and this warning may be repeated at intervals if the message\n"
7140 "remains undelivered. Eventually the mail delivery software will give up,\n"
7141 "and when that happens, the message will be returned to you.\n");
7144 /* Close and wait for child process to complete, without a timeout.
7145 If there's an error, don't update the count. */
7148 if (child_close(pid, 0) == 0)
7150 warning_count = count;
7151 update_spool = TRUE; /* Ensure spool rewritten */
7157 /* Clear deliver_domain */
7159 deliver_domain = NULL;
7161 /* If this was a first delivery attempt, unset the first time flag, and
7162 ensure that the spool gets updated. */
7164 if (deliver_firsttime)
7166 deliver_firsttime = FALSE;
7167 update_spool = TRUE;
7170 /* If delivery was frozen and freeze_tell is set, generate an appropriate
7171 message, unless the message is a local error message (to avoid loops). Then
7172 log the freezing. If the text in "frozen_info" came from a system filter,
7173 it has been escaped into printing characters so as not to mess up log lines.
7174 For the "tell" message, we turn \n back into newline. Also, insert a newline
7175 near the start instead of the ": " string. */
7179 if (freeze_tell != NULL && freeze_tell[0] != 0 && !local_error_message)
7181 uschar *s = string_copy(frozen_info);
7182 uschar *ss = Ustrstr(s, " by the system filter: ");
7193 if (*ss == '\\' && ss[1] == 'n')
7200 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
7201 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
7205 /* Log freezing just before we update the -H file, to minimize the chance
7206 of a race problem. */
7208 deliver_msglog("*** Frozen%s\n", frozen_info);
7209 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
7212 /* If there have been any updates to the non-recipients list, or other things
7213 that get written to the spool, we must now update the spool header file so
7214 that it has the right information for the next delivery attempt. If there
7215 was more than one address being delivered, the header_change update is done
7216 earlier, in case one succeeds and then something crashes. */
7219 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
7220 update_spool, header_rewritten);
7222 if (update_spool || header_rewritten)
7223 /* Panic-dies on error */
7224 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7227 /* Finished with the message log. If the message is complete, it will have
7228 been unlinked or renamed above. */
7230 if (message_logs) (void)fclose(message_log);
7232 /* Now we can close and remove the journal file. Its only purpose is to record
7233 successfully completed deliveries asap so that this information doesn't get
7234 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
7235 not serious, as trying it again is not harmful. The journal might not be open
7236 if all addresses were deferred at routing or directing. Nevertheless, we must
7237 remove it if it exists (may have been lying around from a crash during the
7238 previous delivery attempt). We don't remove the journal if a delivery
7239 subprocess failed to pass back delivery information; this is controlled by
7240 the remove_journal flag. When the journal is left, we also don't move the
7241 message off the main spool if frozen and the option is set. It should get moved
7242 at the next attempt, after the journal has been inspected. */
7244 if (journal_fd >= 0) (void)close(journal_fd);
7248 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
7249 if (Uunlink(spoolname) < 0 && errno != ENOENT)
7250 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", spoolname,
7253 /* Move the message off the spool if reqested */
7255 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
7256 if (deliver_freeze && move_frozen_messages)
7257 (void)spool_move_message(id, message_subdir, US"", US"F");
7261 /* Closing the data file frees the lock; if the file has been unlinked it
7262 will go away. Otherwise the message becomes available for another process
7265 (void)close(deliver_datafile);
7266 deliver_datafile = -1;
7267 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
7269 /* It is unlikely that there will be any cached resources, since they are
7270 released after routing, and in the delivery subprocesses. However, it's
7271 possible for an expansion for something afterwards (for example,
7272 expand_check_condition) to do a lookup. We must therefore be sure everything is
7276 acl_where = ACL_WHERE_UNKNOWN;
7282 /* End of deliver.c */