1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2013 */
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 /* Log the delivery on the main log. We use an extensible string to build up
722 the log line, and reset the store afterwards. Remote deliveries should always
723 have a pointer to the host item that succeeded; local deliveries can have a
724 pointer to a single host item in their host list, for use by the transport. */
726 #ifdef EXPERIMENTAL_TPDA
727 tpda_delivery_ip = NULL; /* presume no successful remote delivery */
728 tpda_delivery_port = 0;
729 tpda_delivery_fqdn = NULL;
730 tpda_delivery_local_part = NULL;
731 tpda_delivery_domain = NULL;
732 tpda_delivery_confirmation = NULL;
735 s = reset_point = store_get(size);
737 log_address = string_log_address(addr, (log_write_selector & L_all_parents) != 0, TRUE);
739 s = string_append(s, &size, &ptr, 3, host_and_ident(TRUE), US" ", log_address);
743 s = string_append(s, &size, &ptr, 2, US"> ", log_address);
746 if ((log_extra_selector & LX_sender_on_delivery) != 0 || msg)
747 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
749 #ifdef EXPERIMENTAL_SRS
750 if(addr->p.srs_sender)
751 s = string_append(s, &size, &ptr, 3, US" SRS=<", addr->p.srs_sender, US">");
754 /* You might think that the return path must always be set for a successful
755 delivery; indeed, I did for some time, until this statement crashed. The case
756 when it is not set is for a delivery to /dev/null which is optimised by not
759 if (used_return_path != NULL &&
760 (log_extra_selector & LX_return_path_on_delivery) != 0)
761 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
764 s = string_append(s, &size, &ptr, 2, US" ", msg);
766 /* For a delivery from a system filter, there may not be a router */
767 if (addr->router != NULL)
768 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
770 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
772 if ((log_extra_selector & LX_delivery_size) != 0)
773 s = string_append(s, &size, &ptr, 2, US" S=",
774 string_sprintf("%d", transport_count));
778 if (addr->transport->info->local)
780 if (addr->host_list != NULL)
782 s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name);
783 #ifdef EXPERIMENTAL_TPDA
784 tpda_delivery_fqdn = addr->host_list->name;
787 if (addr->shadow_message != NULL)
788 s = string_cat(s, &size, &ptr, addr->shadow_message,
789 Ustrlen(addr->shadow_message));
792 /* Remote delivery */
796 if (addr->host_used != NULL)
798 s = d_hostlog(s, &size, &ptr, addr);
799 if (continue_sequence > 1)
800 s = string_cat(s, &size, &ptr, US"*", 1);
802 #ifdef EXPERIMENTAL_TPDA
803 tpda_delivery_ip = addr->host_used->address;
804 tpda_delivery_port = addr->host_used->port;
805 tpda_delivery_fqdn = addr->host_used->name;
806 tpda_delivery_local_part = addr->local_part;
807 tpda_delivery_domain = addr->domain;
808 tpda_delivery_confirmation = addr->message;
813 s = d_tlslog(s, &size, &ptr, addr);
816 if (addr->authenticator)
818 s = string_append(s, &size, &ptr, 2, US" A=", addr->authenticator);
821 s = string_append(s, &size, &ptr, 2, US":", addr->auth_id);
822 if (log_extra_selector & LX_smtp_mailauth && addr->auth_sndr)
823 s = string_append(s, &size, &ptr, 2, US":", addr->auth_sndr);
827 #ifdef EXPERIMENTAL_PRDR
828 if (addr->flags & af_prdr_used)
829 s = string_append(s, &size, &ptr, 1, US" PRDR");
833 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
835 if ((log_extra_selector & LX_smtp_confirmation) != 0 &&
836 addr->message != NULL &&
837 ((addr->host_used != NULL) || (Ustrcmp(addr->transport->driver_name, "lmtp") == 0)))
840 uschar *p = big_buffer;
841 uschar *ss = addr->message;
843 for (i = 0; i < 100 && ss[i] != 0; i++)
845 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\';
850 s = string_append(s, &size, &ptr, 2, US" C=", big_buffer);
853 /* Time on queue and actual time taken to deliver */
855 if ((log_extra_selector & LX_queue_time) != 0)
857 s = string_append(s, &size, &ptr, 2, US" QT=",
858 readconf_printtime(time(NULL) - received_time));
861 if ((log_extra_selector & LX_deliver_time) != 0)
863 s = string_append(s, &size, &ptr, 2, US" DT=",
864 readconf_printtime(addr->more_errno));
867 /* string_cat() always leaves room for the terminator. Release the
868 store we used to build the line after writing it. */
871 log_write(0, flags, "%s", s);
873 #ifdef EXPERIMENTAL_TPDA
874 if (addr->transport->tpda_delivery_action)
877 debug_printf(" TPDA(Delivery): tpda_deliver_action=|%s| tpda_delivery_IP=%s\n",
878 addr->transport->tpda_delivery_action, tpda_delivery_ip);
880 router_name = addr->router->name;
881 transport_name = addr->transport->name;
882 if (!expand_string(addr->transport->tpda_delivery_action) && *expand_string_message)
883 log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand tpda_deliver_action in %s: %s\n",
884 transport_name, expand_string_message);
886 transport_name = NULL;
889 store_reset(reset_point);
895 /*************************************************
896 * Actions at the end of handling an address *
897 *************************************************/
899 /* This is a function for processing a single address when all that can be done
900 with it has been done.
903 addr points to the address block
904 result the result of the delivery attempt
905 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
906 driver_type indicates which type of driver (transport, or router) was last
907 to process the address
908 logchar '=' or '-' for use when logging deliveries with => or ->
914 post_process_one(address_item *addr, int result, int logflags, int driver_type,
917 uschar *now = tod_stamp(tod_log);
918 uschar *driver_kind = NULL;
919 uschar *driver_name = NULL;
922 int size = 256; /* Used for a temporary, */
923 int ptr = 0; /* expanding buffer, for */
924 uschar *s; /* building log lines; */
925 void *reset_point; /* released afterwards. */
928 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
930 /* Set up driver kind and name for logging. Disable logging if the router or
931 transport has disabled it. */
933 if (driver_type == DTYPE_TRANSPORT)
935 if (addr->transport != NULL)
937 driver_name = addr->transport->name;
938 driver_kind = US" transport";
939 disable_logging = addr->transport->disable_logging;
941 else driver_kind = US"transporting";
943 else if (driver_type == DTYPE_ROUTER)
945 if (addr->router != NULL)
947 driver_name = addr->router->name;
948 driver_kind = US" router";
949 disable_logging = addr->router->disable_logging;
951 else driver_kind = US"routing";
954 /* If there's an error message set, ensure that it contains only printing
955 characters - it should, but occasionally things slip in and this at least
956 stops the log format from getting wrecked. We also scan the message for an LDAP
957 expansion item that has a password setting, and flatten the password. This is a
958 fudge, but I don't know a cleaner way of doing this. (If the item is badly
959 malformed, it won't ever have gone near LDAP.) */
961 if (addr->message != NULL)
963 addr->message = string_printing(addr->message);
964 if (((Ustrstr(addr->message, "failed to expand") != NULL) || (Ustrstr(addr->message, "expansion of ") != NULL)) &&
965 (Ustrstr(addr->message, "mysql") != NULL ||
966 Ustrstr(addr->message, "pgsql") != NULL ||
967 #ifdef EXPERIMENTAL_REDIS
968 Ustrstr(addr->message, "redis") != NULL ||
970 Ustrstr(addr->message, "sqlite") != NULL ||
971 Ustrstr(addr->message, "ldap:") != NULL ||
972 Ustrstr(addr->message, "ldapdn:") != NULL ||
973 Ustrstr(addr->message, "ldapm:") != NULL))
975 addr->message = string_sprintf("Temporary internal error");
979 /* If we used a transport that has one of the "return_output" options set, and
980 if it did in fact generate some output, then for return_output we treat the
981 message as failed if it was not already set that way, so that the output gets
982 returned to the sender, provided there is a sender to send it to. For
983 return_fail_output, do this only if the delivery failed. Otherwise we just
984 unlink the file, and remove the name so that if the delivery failed, we don't
985 try to send back an empty or unwanted file. The log_output options operate only
988 In any case, we close the message file, because we cannot afford to leave a
989 file-descriptor for one address while processing (maybe very many) others. */
991 if (addr->return_file >= 0 && addr->return_filename != NULL)
993 BOOL return_output = FALSE;
995 (void)EXIMfsync(addr->return_file);
997 /* If there is no output, do nothing. */
999 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1001 transport_instance *tb = addr->transport;
1003 /* Handle logging options */
1005 if (tb->log_output || (result == FAIL && tb->log_fail_output) ||
1006 (result == DEFER && tb->log_defer_output))
1009 FILE *f = Ufopen(addr->return_filename, "rb");
1011 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1012 "from %s transport: %s", addr->return_filename, tb->name,
1016 s = US Ufgets(big_buffer, big_buffer_size, f);
1019 uschar *p = big_buffer + Ustrlen(big_buffer);
1020 while (p > big_buffer && isspace(p[-1])) p--;
1022 s = string_printing(big_buffer);
1023 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1024 addr->address, tb->name, s);
1030 /* Handle returning options, but only if there is an address to return
1033 if (sender_address[0] != 0 || addr->p.errors_address != NULL)
1035 if (tb->return_output)
1037 addr->transport_return = result = FAIL;
1038 if (addr->basic_errno == 0 && addr->message == NULL)
1039 addr->message = US"return message generated";
1040 return_output = TRUE;
1043 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1047 /* Get rid of the file unless it might be returned, but close it in
1052 Uunlink(addr->return_filename);
1053 addr->return_filename = NULL;
1054 addr->return_file = -1;
1057 (void)close(addr->return_file);
1060 /* The sucess case happens only after delivery by a transport. */
1064 addr->next = addr_succeed;
1065 addr_succeed = addr;
1067 /* Call address_done() to ensure that we don't deliver to this address again,
1068 and write appropriate things to the message log. If it is a child address, we
1069 call child_done() to scan the ancestors and mark them complete if this is the
1070 last child to complete. */
1072 address_done(addr, now);
1073 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1075 if (addr->parent == NULL)
1077 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1078 driver_name, driver_kind);
1082 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1083 addr->parent->address, driver_name, driver_kind);
1084 child_done(addr, now);
1087 delivery_log(LOG_MAIN, addr, logchar, NULL);
1091 /* Soft failure, or local delivery process failed; freezing may be
1094 else if (result == DEFER || result == PANIC)
1096 if (result == PANIC) logflags |= LOG_PANIC;
1098 /* This puts them on the chain in reverse order. Do not change this, because
1099 the code for handling retries assumes that the one with the retry
1100 information is last. */
1102 addr->next = addr_defer;
1105 /* The only currently implemented special action is to freeze the
1106 message. Logging of this is done later, just before the -H file is
1109 if (addr->special_action == SPECIAL_FREEZE)
1111 deliver_freeze = TRUE;
1112 deliver_frozen_at = time(NULL);
1113 update_spool = TRUE;
1116 /* If doing a 2-stage queue run, we skip writing to either the message
1117 log or the main log for SMTP defers. */
1119 if (!queue_2stage || addr->basic_errno != 0)
1123 /* For errors of the type "retry time not reached" (also remotes skipped
1124 on queue run), logging is controlled by L_retry_defer. Note that this kind
1125 of error number is negative, and all the retry ones are less than any
1128 unsigned int use_log_selector = (addr->basic_errno <= ERRNO_RETRY_BASE)?
1131 /* Build up the line that is used for both the message log and the main
1134 s = reset_point = store_get(size);
1136 /* Create the address string for logging. Must not do this earlier, because
1137 an OK result may be changed to FAIL when a pipe returns text. */
1139 log_address = string_log_address(addr,
1140 (log_write_selector & L_all_parents) != 0, result == OK);
1142 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1144 /* Either driver_name contains something and driver_kind contains
1145 " router" or " transport" (note the leading space), or driver_name is
1146 a null string and driver_kind contains "routing" without the leading
1147 space, if all routing has been deferred. When a domain has been held,
1148 so nothing has been done at all, both variables contain null strings. */
1150 if (driver_name == NULL)
1152 if (driver_kind != NULL)
1153 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1157 if (driver_kind[1] == 't' && addr->router != NULL)
1158 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1160 ss[1] = toupper(driver_kind[1]);
1161 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1164 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1165 s = string_cat(s, &size, &ptr, ss, Ustrlen(ss));
1167 if (addr->basic_errno > 0)
1168 s = string_append(s, &size, &ptr, 2, US": ",
1169 US strerror(addr->basic_errno));
1171 if (addr->message != NULL)
1172 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1176 /* Log the deferment in the message log, but don't clutter it
1177 up with retry-time defers after the first delivery attempt. */
1179 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1180 deliver_msglog("%s %s\n", now, s);
1182 /* Write the main log and reset the store */
1184 log_write(use_log_selector, logflags, "== %s", s);
1185 store_reset(reset_point);
1190 /* Hard failure. If there is an address to which an error message can be sent,
1191 put this address on the failed list. If not, put it on the deferred list and
1192 freeze the mail message for human attention. The latter action can also be
1193 explicitly requested by a router or transport. */
1197 /* If this is a delivery error, or a message for which no replies are
1198 wanted, and the message's age is greater than ignore_bounce_errors_after,
1199 force the af_ignore_error flag. This will cause the address to be discarded
1200 later (with a log entry). */
1202 if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
1203 setflag(addr, af_ignore_error);
1205 /* Freeze the message if requested, or if this is a bounce message (or other
1206 message with null sender) and this address does not have its own errors
1207 address. However, don't freeze if errors are being ignored. The actual code
1208 to ignore occurs later, instead of sending a message. Logging of freezing
1209 occurs later, just before writing the -H file. */
1211 if (!testflag(addr, af_ignore_error) &&
1212 (addr->special_action == SPECIAL_FREEZE ||
1213 (sender_address[0] == 0 && addr->p.errors_address == NULL)
1216 frozen_info = (addr->special_action == SPECIAL_FREEZE)? US"" :
1217 (sender_local && !local_error_message)?
1218 US" (message created with -f <>)" : US" (delivery error message)";
1219 deliver_freeze = TRUE;
1220 deliver_frozen_at = time(NULL);
1221 update_spool = TRUE;
1223 /* The address is put on the defer rather than the failed queue, because
1224 the message is being retained. */
1226 addr->next = addr_defer;
1230 /* Don't put the address on the nonrecipients tree yet; wait until an
1231 error message has been successfully sent. */
1235 addr->next = addr_failed;
1239 /* Build up the log line for the message and main logs */
1241 s = reset_point = store_get(size);
1243 /* Create the address string for logging. Must not do this earlier, because
1244 an OK result may be changed to FAIL when a pipe returns text. */
1246 log_address = string_log_address(addr,
1247 (log_write_selector & L_all_parents) != 0, result == OK);
1249 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1251 if ((log_extra_selector & LX_sender_on_delivery) != 0)
1252 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1254 /* Return path may not be set if no delivery actually happened */
1256 if (used_return_path != NULL &&
1257 (log_extra_selector & LX_return_path_on_delivery) != 0)
1258 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1260 if (addr->router != NULL)
1261 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1262 if (addr->transport != NULL)
1263 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1265 if (addr->host_used != NULL)
1266 s = d_hostlog(s, &size, &ptr, addr);
1269 s = d_tlslog(s, &size, &ptr, addr);
1272 if (addr->basic_errno > 0)
1273 s = string_append(s, &size, &ptr, 2, US": ",
1274 US strerror(addr->basic_errno));
1276 if (addr->message != NULL)
1277 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1281 /* Do the logging. For the message log, "routing failed" for those cases,
1282 just to make it clearer. */
1284 if (driver_name == NULL)
1285 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1287 deliver_msglog("%s %s\n", now, s);
1289 log_write(0, LOG_MAIN, "** %s", s);
1290 store_reset(reset_point);
1293 /* Ensure logging is turned on again in all cases */
1295 disable_logging = FALSE;
1301 /*************************************************
1302 * Address-independent error *
1303 *************************************************/
1305 /* This function is called when there's an error that is not dependent on a
1306 particular address, such as an expansion string failure. It puts the error into
1307 all the addresses in a batch, logs the incident on the main and panic logs, and
1308 clears the expansions. It is mostly called from local_deliver(), but can be
1309 called for a remote delivery via findugid().
1312 logit TRUE if (MAIN+PANIC) logging required
1313 addr the first of the chain of addresses
1315 format format string for error message, or NULL if already set in addr
1316 ... arguments for the format
1322 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1324 address_item *addr2;
1325 addr->basic_errno = code;
1331 va_start(ap, format);
1332 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1333 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1334 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1336 addr->message = string_copy(buffer);
1339 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
1341 addr2->basic_errno = code;
1342 addr2->message = addr->message;
1345 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1346 deliver_set_expansions(NULL);
1352 /*************************************************
1353 * Check a "never users" list *
1354 *************************************************/
1356 /* This function is called to check whether a uid is on one of the two "never
1360 uid the uid to be checked
1361 nusers the list to be scanned; the first item in the list is the count
1363 Returns: TRUE if the uid is on the list
1367 check_never_users(uid_t uid, uid_t *nusers)
1370 if (nusers == NULL) return FALSE;
1371 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1377 /*************************************************
1378 * Find uid and gid for a transport *
1379 *************************************************/
1381 /* This function is called for both local and remote deliveries, to find the
1382 uid/gid under which to run the delivery. The values are taken preferentially
1383 from the transport (either explicit or deliver_as_creator), then from the
1384 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1385 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1386 panic error is logged, and the function fails (which normally leads to delivery
1390 addr the address (possibly a chain)
1392 uidp pointer to uid field
1393 gidp pointer to gid field
1394 igfp pointer to the use_initgroups field
1396 Returns: FALSE if failed - error has been set in address(es)
1400 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1403 uschar *nuname = NULL;
1404 BOOL gid_set = FALSE;
1406 /* Default initgroups flag comes from the transport */
1408 *igfp = tp->initgroups;
1410 /* First see if there's a gid on the transport, either fixed or expandable.
1411 The expanding function always logs failure itself. */
1418 else if (tp->expand_gid != NULL)
1420 if (route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1421 &(addr->message))) gid_set = TRUE;
1424 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1429 /* If the transport did not set a group, see if the router did. */
1431 if (!gid_set && testflag(addr, af_gid_set))
1437 /* Pick up a uid from the transport if one is set. */
1439 if (tp->uid_set) *uidp = tp->uid;
1441 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1442 it does not provide a passwd value from which a gid can be taken. */
1444 else if (tp->expand_uid != NULL)
1447 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1448 uidp, &(addr->message)))
1450 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1453 if (!gid_set && pw != NULL)
1460 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1462 else if (tp->deliver_as_creator)
1464 *uidp = originator_uid;
1467 *gidp = originator_gid;
1472 /* Otherwise see if the address specifies the uid and if so, take it and its
1475 else if (testflag(addr, af_uid_set))
1478 *igfp = testflag(addr, af_initgroups);
1481 /* Nothing has specified the uid - default to the Exim user, and group if the
1494 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1495 defaulting to the Exim uid. In other words, if the configuration has specified
1496 a uid, it must also provide a gid. */
1500 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1501 "%s transport", tp->name);
1505 /* Check that the uid is not on the lists of banned uids that may not be used
1506 for delivery processes. */
1508 if (check_never_users(*uidp, never_users))
1509 nuname = US"never_users";
1510 else if (check_never_users(*uidp, fixed_never_users))
1511 nuname = US"fixed_never_users";
1515 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1516 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1528 /*************************************************
1529 * Check the size of a message for a transport *
1530 *************************************************/
1532 /* Checks that the message isn't too big for the selected transport.
1533 This is called only when it is known that the limit is set.
1537 addr the (first) address being delivered
1540 DEFER expansion failed or did not yield an integer
1541 FAIL message too big
1545 check_message_size(transport_instance *tp, address_item *addr)
1550 deliver_set_expansions(addr);
1551 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1552 deliver_set_expansions(NULL);
1554 if (expand_string_message != NULL)
1557 if (size_limit == -1)
1558 addr->message = string_sprintf("failed to expand message_size_limit "
1559 "in %s transport: %s", tp->name, expand_string_message);
1561 addr->message = string_sprintf("invalid message_size_limit "
1562 "in %s transport: %s", tp->name, expand_string_message);
1564 else if (size_limit > 0 && message_size > size_limit)
1568 string_sprintf("message is too big (transport limit = %d)",
1577 /*************************************************
1578 * Transport-time check for a previous delivery *
1579 *************************************************/
1581 /* Check that this base address hasn't previously been delivered to its routed
1582 transport. If it has been delivered, mark it done. The check is necessary at
1583 delivery time in order to handle homonymic addresses correctly in cases where
1584 the pattern of redirection changes between delivery attempts (so the unique
1585 fields change). Non-homonymic previous delivery is detected earlier, at routing
1586 time (which saves unnecessary routing).
1589 addr the address item
1590 testing TRUE if testing wanted only, without side effects
1592 Returns: TRUE if previously delivered by the transport
1596 previously_transported(address_item *addr, BOOL testing)
1598 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
1599 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
1601 if (tree_search(tree_nonrecipients, big_buffer) != 0)
1603 DEBUG(D_deliver|D_route|D_transport)
1604 debug_printf("%s was previously delivered (%s transport): discarded\n",
1605 addr->address, addr->transport->name);
1606 if (!testing) child_done(addr, tod_stamp(tod_log));
1615 /******************************************************
1616 * Check for a given header in a header string *
1617 ******************************************************/
1619 /* This function is used when generating quota warnings. The configuration may
1620 specify any header lines it likes in quota_warn_message. If certain of them are
1621 missing, defaults are inserted, so we need to be able to test for the presence
1625 hdr the required header name
1626 hstring the header string
1628 Returns: TRUE the header is in the string
1629 FALSE the header is not in the string
1633 contains_header(uschar *hdr, uschar *hstring)
1635 int len = Ustrlen(hdr);
1636 uschar *p = hstring;
1639 if (strncmpic(p, hdr, len) == 0)
1642 while (*p == ' ' || *p == '\t') p++;
1643 if (*p == ':') return TRUE;
1645 while (*p != 0 && *p != '\n') p++;
1646 if (*p == '\n') p++;
1654 /*************************************************
1655 * Perform a local delivery *
1656 *************************************************/
1658 /* Each local delivery is performed in a separate process which sets its
1659 uid and gid as specified. This is a safer way than simply changing and
1660 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
1661 used safely. From release 4, Exim no longer makes any use of it. Besides, not
1662 all systems have seteuid().
1664 If the uid/gid are specified in the transport_instance, they are used; the
1665 transport initialization must ensure that either both or neither are set.
1666 Otherwise, the values associated with the address are used. If neither are set,
1667 it is a configuration error.
1669 The transport or the address may specify a home directory (transport over-
1670 rides), and if they do, this is set as $home. If neither have set a working
1671 directory, this value is used for that as well. Otherwise $home is left unset
1672 and the cwd is set to "/" - a directory that should be accessible to all users.
1674 Using a separate process makes it more complicated to get error information
1675 back. We use a pipe to pass the return code and also an error code and error
1676 text string back to the parent process.
1679 addr points to an address block for this delivery; for "normal" local
1680 deliveries this is the only address to be delivered, but for
1681 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
1682 a number of addresses can be handled simultaneously, and in this
1683 case addr will point to a chain of addresses with the same
1686 shadowing TRUE if running a shadow transport; this causes output from pipes
1693 deliver_local(address_item *addr, BOOL shadowing)
1695 BOOL use_initgroups;
1698 int status, len, rc;
1701 uschar *working_directory;
1702 address_item *addr2;
1703 transport_instance *tp = addr->transport;
1705 /* Set up the return path from the errors or sender address. If the transport
1706 has its own return path setting, expand it and replace the existing value. */
1708 if(addr->p.errors_address != NULL)
1709 return_path = addr->p.errors_address;
1710 #ifdef EXPERIMENTAL_SRS
1711 else if(addr->p.srs_sender != NULL)
1712 return_path = addr->p.srs_sender;
1715 return_path = sender_address;
1717 if (tp->return_path != NULL)
1719 uschar *new_return_path = expand_string(tp->return_path);
1720 if (new_return_path == NULL)
1722 if (!expand_string_forcedfail)
1724 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
1725 US"Failed to expand return path \"%s\" in %s transport: %s",
1726 tp->return_path, tp->name, expand_string_message);
1730 else return_path = new_return_path;
1733 /* For local deliveries, one at a time, the value used for logging can just be
1734 set directly, once and for all. */
1736 used_return_path = return_path;
1738 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
1739 gets put into the address(es), and the expansions are unset, so we can just
1742 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
1744 /* See if either the transport or the address specifies a home directory. A
1745 home directory set in the address may already be expanded; a flag is set to
1746 indicate that. In other cases we must expand it. */
1748 if ((deliver_home = tp->home_dir) != NULL || /* Set in transport, or */
1749 ((deliver_home = addr->home_dir) != NULL && /* Set in address and */
1750 !testflag(addr, af_home_expanded))) /* not expanded */
1752 uschar *rawhome = deliver_home;
1753 deliver_home = NULL; /* in case it contains $home */
1754 deliver_home = expand_string(rawhome);
1755 if (deliver_home == NULL)
1757 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
1758 "to expand for %s transport: %s", rawhome, tp->name,
1759 expand_string_message);
1762 if (*deliver_home != '/')
1764 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
1765 "is not absolute for %s transport", deliver_home, tp->name);
1770 /* See if either the transport or the address specifies a current directory,
1771 and if so, expand it. If nothing is set, use the home directory, unless it is
1772 also unset in which case use "/", which is assumed to be a directory to which
1773 all users have access. It is necessary to be in a visible directory for some
1774 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
1775 2.5) require this. */
1777 working_directory = (tp->current_dir != NULL)?
1778 tp->current_dir : addr->current_dir;
1780 if (working_directory != NULL)
1782 uschar *raw = working_directory;
1783 working_directory = expand_string(raw);
1784 if (working_directory == NULL)
1786 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
1787 "failed to expand for %s transport: %s", raw, tp->name,
1788 expand_string_message);
1791 if (*working_directory != '/')
1793 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
1794 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
1798 else working_directory = (deliver_home == NULL)? US"/" : deliver_home;
1800 /* If one of the return_output flags is set on the transport, create and open a
1801 file in the message log directory for the transport to write its output onto.
1802 This is mainly used by pipe transports. The file needs to be unique to the
1803 address. This feature is not available for shadow transports. */
1805 if (!shadowing && (tp->return_output || tp->return_fail_output ||
1806 tp->log_output || tp->log_fail_output))
1809 addr->return_filename =
1810 string_sprintf("%s/msglog/%s/%s-%d-%d", spool_directory, message_subdir,
1811 message_id, getpid(), return_count++);
1812 addr->return_file = open_msglog_file(addr->return_filename, 0400, &error);
1813 if (addr->return_file < 0)
1815 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
1816 "to return message: %s", error, tp->name, strerror(errno));
1821 /* Create the pipe for inter-process communication. */
1825 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
1830 /* Now fork the process to do the real work in the subprocess, but first
1831 ensure that all cached resources are freed so that the subprocess starts with
1832 a clean slate and doesn't interfere with the parent process. */
1836 if ((pid = fork()) == 0)
1838 BOOL replicate = TRUE;
1840 /* Prevent core dumps, as we don't want them in users' home directories.
1841 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
1842 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
1843 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
1844 complain if the error is "not supported".
1846 There are two scenarios where changing the max limit has an effect. In one,
1847 the user is using a .forward and invoking a command of their choice via pipe;
1848 for these, we do need the max limit to be 0 unless the admin chooses to
1849 permit an increased limit. In the other, the command is invoked directly by
1850 the transport and is under administrator control, thus being able to raise
1851 the limit aids in debugging. So there's no general always-right answer.
1853 Thus we inhibit core-dumps completely but let individual transports, while
1854 still root, re-raise the limits back up to aid debugging. We make the
1855 default be no core-dumps -- few enough people can use core dumps in
1856 diagnosis that it's reasonable to make them something that has to be explicitly requested.
1863 if (setrlimit(RLIMIT_CORE, &rl) < 0)
1865 #ifdef SETRLIMIT_NOT_SUPPORTED
1866 if (errno != ENOSYS && errno != ENOTSUP)
1868 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
1873 /* Reset the random number generator, so different processes don't all
1874 have the same sequence. */
1878 /* If the transport has a setup entry, call this first, while still
1879 privileged. (Appendfile uses this to expand quota, for example, while
1880 able to read private files.) */
1882 if (addr->transport->setup != NULL)
1884 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
1888 addr->transport_return = DEFER;
1892 addr->transport_return = PANIC;
1897 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
1898 when the process becomes unprivileged, it won't be able to write to the
1899 process log. SIGHUP is ignored throughout exim, except when it is being
1902 signal(SIGINT, SIG_IGN);
1903 signal(SIGTERM, SIG_IGN);
1904 signal(SIGUSR1, SIG_IGN);
1906 /* Close the unwanted half of the pipe, and set close-on-exec for the other
1907 half - for transports that exec things (e.g. pipe). Then set the required
1910 (void)close(pfd[pipe_read]);
1911 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
1913 exim_setugid(uid, gid, use_initgroups,
1914 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
1915 addr->address, addr->transport->name));
1919 address_item *batched;
1920 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
1921 for (batched = addr->next; batched != NULL; batched = batched->next)
1922 debug_printf("additional batched address: %s\n", batched->address);
1925 /* Set an appropriate working directory. */
1927 if (Uchdir(working_directory) < 0)
1929 addr->transport_return = DEFER;
1930 addr->basic_errno = errno;
1931 addr->message = string_sprintf("failed to chdir to %s", working_directory);
1934 /* If successful, call the transport */
1939 set_process_info("delivering %s to %s using %s", message_id,
1940 addr->local_part, addr->transport->name);
1942 /* Setting this global in the subprocess means we need never clear it */
1943 transport_name = addr->transport->name;
1945 /* If a transport filter has been specified, set up its argument list.
1946 Any errors will get put into the address, and FALSE yielded. */
1948 if (addr->transport->filter_command != NULL)
1950 ok = transport_set_up_command(&transport_filter_argv,
1951 addr->transport->filter_command,
1952 TRUE, PANIC, addr, US"transport filter", NULL);
1953 transport_filter_timeout = addr->transport->filter_timeout;
1955 else transport_filter_argv = NULL;
1959 debug_print_string(addr->transport->debug_string);
1960 replicate = !(addr->transport->info->code)(addr->transport, addr);
1964 /* Pass the results back down the pipe. If necessary, first replicate the
1965 status in the top address to the others in the batch. The label is the
1966 subject of a goto when a call to the transport's setup function fails. We
1967 pass the pointer to the transport back in case it got changed as a result of
1968 file_format in appendfile. */
1972 if (replicate) replicate_status(addr);
1973 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
1976 int local_part_length = Ustrlen(addr2->local_part);
1980 if( (ret = write(pfd[pipe_write], (void *)&(addr2->transport_return), sizeof(int))) != sizeof(int)
1981 || (ret = write(pfd[pipe_write], (void *)&transport_count, sizeof(transport_count))) != sizeof(transport_count)
1982 || (ret = write(pfd[pipe_write], (void *)&(addr2->flags), sizeof(addr2->flags))) != sizeof(addr2->flags)
1983 || (ret = write(pfd[pipe_write], (void *)&(addr2->basic_errno), sizeof(int))) != sizeof(int)
1984 || (ret = write(pfd[pipe_write], (void *)&(addr2->more_errno), sizeof(int))) != sizeof(int)
1985 || (ret = write(pfd[pipe_write], (void *)&(addr2->special_action), sizeof(int))) != sizeof(int)
1986 || (ret = write(pfd[pipe_write], (void *)&(addr2->transport),
1987 sizeof(transport_instance *))) != sizeof(transport_instance *)
1989 /* For a file delivery, pass back the local part, in case the original
1990 was only part of the final delivery path. This gives more complete
1993 || (testflag(addr2, af_file)
1994 && ( (ret = write(pfd[pipe_write], (void *)&local_part_length, sizeof(int))) != sizeof(int)
1995 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
1999 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2000 ret == -1 ? strerror(errno) : "short write");
2002 /* Now any messages */
2004 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2006 int message_length = (s == NULL)? 0 : Ustrlen(s) + 1;
2007 if( (ret = write(pfd[pipe_write], (void *)&message_length, sizeof(int))) != sizeof(int)
2008 || (message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length)
2010 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2011 ret == -1 ? strerror(errno) : "short write");
2015 /* OK, this process is now done. Free any cached resources that it opened,
2016 and close the pipe we were writing down before exiting. */
2018 (void)close(pfd[pipe_write]);
2023 /* Back in the main process: panic if the fork did not succeed. This seems
2024 better than returning an error - if forking is failing it is probably best
2025 not to try other deliveries for this message. */
2028 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2031 /* Read the pipe to get the delivery status codes and error messages. Our copy
2032 of the writing end must be closed first, as otherwise read() won't return zero
2033 on an empty pipe. We check that a status exists for each address before
2034 overwriting the address structure. If data is missing, the default DEFER status
2035 will remain. Afterwards, close the reading end. */
2037 (void)close(pfd[pipe_write]);
2039 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2041 len = read(pfd[pipe_read], (void *)&status, sizeof(int));
2047 addr2->transport_return = status;
2048 len = read(pfd[pipe_read], (void *)&transport_count,
2049 sizeof(transport_count));
2050 len = read(pfd[pipe_read], (void *)&(addr2->flags), sizeof(addr2->flags));
2051 len = read(pfd[pipe_read], (void *)&(addr2->basic_errno), sizeof(int));
2052 len = read(pfd[pipe_read], (void *)&(addr2->more_errno), sizeof(int));
2053 len = read(pfd[pipe_read], (void *)&(addr2->special_action), sizeof(int));
2054 len = read(pfd[pipe_read], (void *)&(addr2->transport),
2055 sizeof(transport_instance *));
2057 if (testflag(addr2, af_file))
2059 int local_part_length;
2060 len = read(pfd[pipe_read], (void *)&local_part_length, sizeof(int));
2061 len = read(pfd[pipe_read], (void *)big_buffer, local_part_length);
2062 big_buffer[local_part_length] = 0;
2063 addr2->local_part = string_copy(big_buffer);
2066 for (i = 0, sptr = &(addr2->message); i < 2;
2067 i++, sptr = &(addr2->user_message))
2070 len = read(pfd[pipe_read], (void *)&message_length, sizeof(int));
2071 if (message_length > 0)
2073 len = read(pfd[pipe_read], (void *)big_buffer, message_length);
2074 if (len > 0) *sptr = string_copy(big_buffer);
2081 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2082 "from delivery subprocess", addr2->unique);
2087 (void)close(pfd[pipe_read]);
2089 /* Unless shadowing, write all successful addresses immediately to the journal
2090 file, to ensure they are recorded asap. For homonymic addresses, use the base
2091 address plus the transport name. Failure to write the journal is panic-worthy,
2092 but don't stop, as it may prove possible subsequently to update the spool file
2093 in order to record the delivery. */
2097 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2099 if (addr2->transport_return != OK) continue;
2101 if (testflag(addr2, af_homonym))
2102 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2104 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2106 /* In the test harness, wait just a bit to let the subprocess finish off
2107 any debug output etc first. */
2109 if (running_in_test_harness) millisleep(300);
2111 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2112 len = Ustrlen(big_buffer);
2113 if (write(journal_fd, big_buffer, len) != len)
2114 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2115 big_buffer, strerror(errno));
2118 /* Ensure the journal file is pushed out to disk. */
2120 if (EXIMfsync(journal_fd) < 0)
2121 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2125 /* Wait for the process to finish. If it terminates with a non-zero code,
2126 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2127 status values of all the addresses as they are. Take care to handle the case
2128 when the subprocess doesn't seem to exist. This has been seen on one system
2129 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2130 happens, wait() doesn't recognize the termination of child processes. Exim now
2131 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2133 while ((rc = wait(&status)) != pid)
2135 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2137 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2138 addr->transport->driver_name);
2144 if ((status & 0xffff) != 0)
2146 int msb = (status >> 8) & 255;
2147 int lsb = status & 255;
2148 int code = (msb == 0)? (lsb & 0x7f) : msb;
2149 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2150 addr->special_action = SPECIAL_FREEZE;
2151 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2152 "status 0x%04x: %s %d",
2153 addr->transport->driver_name,
2155 (msb == 0)? "terminated by signal" : "exit code",
2159 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2161 if (addr->special_action == SPECIAL_WARN &&
2162 addr->transport->warn_message != NULL)
2165 uschar *warn_message;
2167 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2169 warn_message = expand_string(addr->transport->warn_message);
2170 if (warn_message == NULL)
2171 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2172 "message for %s transport): %s", addr->transport->warn_message,
2173 addr->transport->name, expand_string_message);
2176 pid_t pid = child_open_exim(&fd);
2179 FILE *f = fdopen(fd, "wb");
2180 if (errors_reply_to != NULL &&
2181 !contains_header(US"Reply-To", warn_message))
2182 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2183 fprintf(f, "Auto-Submitted: auto-replied\n");
2184 if (!contains_header(US"From", warn_message)) moan_write_from(f);
2185 fprintf(f, "%s", CS warn_message);
2187 /* Close and wait for child process to complete, without a timeout. */
2190 (void)child_close(pid, 0);
2194 addr->special_action = SPECIAL_NONE;
2200 /*************************************************
2201 * Do local deliveries *
2202 *************************************************/
2204 /* This function processes the list of addresses in addr_local. True local
2205 deliveries are always done one address at a time. However, local deliveries can
2206 be batched up in some cases. Typically this is when writing batched SMTP output
2207 files for use by some external transport mechanism, or when running local
2208 deliveries over LMTP.
2215 do_local_deliveries(void)
2218 open_db *dbm_file = NULL;
2219 time_t now = time(NULL);
2221 /* Loop until we have exhausted the supply of local deliveries */
2223 while (addr_local != NULL)
2225 time_t delivery_start;
2227 address_item *addr2, *addr3, *nextaddr;
2228 int logflags = LOG_MAIN;
2229 int logchar = dont_deliver? '*' : '=';
2230 transport_instance *tp;
2232 /* Pick the first undelivered address off the chain */
2234 address_item *addr = addr_local;
2235 addr_local = addr->next;
2238 DEBUG(D_deliver|D_transport)
2239 debug_printf("--------> %s <--------\n", addr->address);
2241 /* An internal disaster if there is no transport. Should not occur! */
2243 if ((tp = addr->transport) == NULL)
2245 logflags |= LOG_PANIC;
2246 disable_logging = FALSE; /* Jic */
2248 (addr->router != NULL)?
2249 string_sprintf("No transport set by %s router", addr->router->name)
2251 string_sprintf("No transport set by system filter");
2252 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2256 /* Check that this base address hasn't previously been delivered to this
2257 transport. The check is necessary at this point to handle homonymic addresses
2258 correctly in cases where the pattern of redirection changes between delivery
2259 attempts. Non-homonymic previous delivery is detected earlier, at routing
2262 if (previously_transported(addr, FALSE)) continue;
2264 /* There are weird cases where logging is disabled */
2266 disable_logging = tp->disable_logging;
2268 /* Check for batched addresses and possible amalgamation. Skip all the work
2269 if either batch_max <= 1 or there aren't any other addresses for local
2272 if (tp->batch_max > 1 && addr_local != NULL)
2274 int batch_count = 1;
2275 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2276 BOOL uses_lp = (testflag(addr, af_pfr) &&
2277 (testflag(addr, af_file) || addr->local_part[0] == '|')) ||
2278 readconf_depends((driver_instance *)tp, US"local_part");
2279 uschar *batch_id = NULL;
2280 address_item **anchor = &addr_local;
2281 address_item *last = addr;
2284 /* Expand the batch_id string for comparison with other addresses.
2285 Expansion failure suppresses batching. */
2287 if (tp->batch_id != NULL)
2289 deliver_set_expansions(addr);
2290 batch_id = expand_string(tp->batch_id);
2291 deliver_set_expansions(NULL);
2292 if (batch_id == NULL)
2294 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2295 "in %s transport (%s): %s", tp->name, addr->address,
2296 expand_string_message);
2297 batch_count = tp->batch_max;
2301 /* Until we reach the batch_max limit, pick off addresses which have the
2302 same characteristics. These are:
2305 not previously delivered (see comment about 50 lines above)
2306 same local part if the transport's configuration contains $local_part
2307 or if this is a file or pipe delivery from a redirection
2308 same domain if the transport's configuration contains $domain
2310 same additional headers
2311 same headers to be removed
2312 same uid/gid for running the transport
2313 same first host if a host list is set
2316 while ((next = *anchor) != NULL && batch_count < tp->batch_max)
2319 tp == next->transport &&
2320 !previously_transported(next, TRUE) &&
2321 (addr->flags & (af_pfr|af_file)) == (next->flags & (af_pfr|af_file)) &&
2322 (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0) &&
2323 (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0) &&
2324 same_strings(next->p.errors_address, addr->p.errors_address) &&
2325 same_headers(next->p.extra_headers, addr->p.extra_headers) &&
2326 same_strings(next->p.remove_headers, addr->p.remove_headers) &&
2327 same_ugid(tp, addr, next) &&
2328 ((addr->host_list == NULL && next->host_list == NULL) ||
2329 (addr->host_list != NULL && next->host_list != NULL &&
2330 Ustrcmp(addr->host_list->name, next->host_list->name) == 0));
2332 /* If the transport has a batch_id setting, batch_id will be non-NULL
2333 from the expansion outside the loop. Expand for this address and compare.
2334 Expansion failure makes this address ineligible for batching. */
2336 if (ok && batch_id != NULL)
2339 address_item *save_nextnext = next->next;
2340 next->next = NULL; /* Expansion for a single address */
2341 deliver_set_expansions(next);
2342 next->next = save_nextnext;
2343 bid = expand_string(tp->batch_id);
2344 deliver_set_expansions(NULL);
2347 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2348 "in %s transport (%s): %s", tp->name, next->address,
2349 expand_string_message);
2352 else ok = (Ustrcmp(batch_id, bid) == 0);
2355 /* Take address into batch if OK. */
2359 *anchor = next->next; /* Include the address */
2365 else anchor = &(next->next); /* Skip the address */
2369 /* We now have one or more addresses that can be delivered in a batch. Check
2370 whether the transport is prepared to accept a message of this size. If not,
2371 fail them all forthwith. If the expansion fails, or does not yield an
2372 integer, defer delivery. */
2374 if (tp->message_size_limit != NULL)
2376 int rc = check_message_size(tp, addr);
2379 replicate_status(addr);
2380 while (addr != NULL)
2383 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2386 continue; /* With next batch of addresses */
2390 /* If we are not running the queue, or if forcing, all deliveries will be
2391 attempted. Otherwise, we must respect the retry times for each address. Even
2392 when not doing this, we need to set up the retry key string, and determine
2393 whether a retry record exists, because after a successful delivery, a delete
2394 retry item must be set up. Keep the retry database open only for the duration
2395 of these checks, rather than for all local deliveries, because some local
2396 deliveries (e.g. to pipes) can take a substantial time. */
2398 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
2399 if (dbm_file == NULL)
2401 DEBUG(D_deliver|D_retry|D_hints_lookup)
2402 debug_printf("no retry data available\n");
2407 while (addr2 != NULL)
2409 BOOL ok = TRUE; /* to deliver this address */
2412 /* Set up the retry key to include the domain or not, and change its
2413 leading character from "R" to "T". Must make a copy before doing this,
2414 because the old key may be pointed to from a "delete" retry item after
2417 retry_key = string_copy(
2418 (tp->retry_use_local_part)? addr2->address_retry_key :
2419 addr2->domain_retry_key);
2422 /* Inspect the retry data. If there is no hints file, delivery happens. */
2424 if (dbm_file != NULL)
2426 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2428 /* If there is no retry record, delivery happens. If there is,
2429 remember it exists so it can be deleted after a successful delivery. */
2431 if (retry_record != NULL)
2433 setflag(addr2, af_lt_retry_exists);
2435 /* A retry record exists for this address. If queue running and not
2436 forcing, inspect its contents. If the record is too old, or if its
2437 retry time has come, or if it has passed its cutoff time, delivery
2442 debug_printf("retry record exists: age=%s ",
2443 readconf_printtime(now - retry_record->time_stamp));
2444 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2445 debug_printf(" time to retry = %s expired = %d\n",
2446 readconf_printtime(retry_record->next_try - now),
2447 retry_record->expired);
2450 if (queue_running && !deliver_force)
2452 ok = (now - retry_record->time_stamp > retry_data_expire) ||
2453 (now >= retry_record->next_try) ||
2454 retry_record->expired;
2456 /* If we haven't reached the retry time, there is one more check
2457 to do, which is for the ultimate address timeout. */
2460 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2464 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2467 /* This address is to be delivered. Leave it on the chain. */
2472 addr2 = addr2->next;
2475 /* This address is to be deferred. Take it out of the chain, and
2476 post-process it as complete. Must take it out of the chain first,
2477 because post processing puts it on another chain. */
2481 address_item *this = addr2;
2482 this->message = US"Retry time not yet reached";
2483 this->basic_errno = ERRNO_LRETRY;
2484 if (addr3 == NULL) addr2 = addr = addr2->next;
2485 else addr2 = addr3->next = addr2->next;
2486 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2490 if (dbm_file != NULL) dbfn_close(dbm_file);
2492 /* If there are no addresses left on the chain, they all deferred. Loop
2493 for the next set of addresses. */
2495 if (addr == NULL) continue;
2497 /* So, finally, we do have some addresses that can be passed to the
2498 transport. Before doing so, set up variables that are relevant to a
2501 deliver_set_expansions(addr);
2502 delivery_start = time(NULL);
2503 deliver_local(addr, FALSE);
2504 deliver_time = (int)(time(NULL) - delivery_start);
2506 /* If a shadow transport (which must perforce be another local transport), is
2507 defined, and its condition is met, we must pass the message to the shadow
2508 too, but only those addresses that succeeded. We do this by making a new
2509 chain of addresses - also to keep the original chain uncontaminated. We must
2510 use a chain rather than doing it one by one, because the shadow transport may
2513 NOTE: if the condition fails because of a lookup defer, there is nothing we
2516 if (tp->shadow != NULL &&
2517 (tp->shadow_condition == NULL ||
2518 expand_check_condition(tp->shadow_condition, tp->name, US"transport")))
2520 transport_instance *stp;
2521 address_item *shadow_addr = NULL;
2522 address_item **last = &shadow_addr;
2524 for (stp = transports; stp != NULL; stp = stp->next)
2525 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
2528 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
2531 /* Pick off the addresses that have succeeded, and make clones. Put into
2532 the shadow_message field a pointer to the shadow_message field of the real
2535 else for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2537 if (addr2->transport_return != OK) continue;
2538 addr3 = store_get(sizeof(address_item));
2541 addr3->shadow_message = (uschar *)(&(addr2->shadow_message));
2542 addr3->transport = stp;
2543 addr3->transport_return = DEFER;
2544 addr3->return_filename = NULL;
2545 addr3->return_file = -1;
2547 last = &(addr3->next);
2550 /* If we found any addresses to shadow, run the delivery, and stick any
2551 message back into the shadow_message field in the original. */
2553 if (shadow_addr != NULL)
2555 int save_count = transport_count;
2557 DEBUG(D_deliver|D_transport)
2558 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2559 deliver_local(shadow_addr, TRUE);
2561 for(; shadow_addr != NULL; shadow_addr = shadow_addr->next)
2563 int sresult = shadow_addr->transport_return;
2564 *((uschar **)(shadow_addr->shadow_message)) = (sresult == OK)?
2565 string_sprintf(" ST=%s", stp->name) :
2566 string_sprintf(" ST=%s (%s%s%s)", stp->name,
2567 (shadow_addr->basic_errno <= 0)?
2568 US"" : US strerror(shadow_addr->basic_errno),
2569 (shadow_addr->basic_errno <= 0 || shadow_addr->message == NULL)?
2571 (shadow_addr->message != NULL)? shadow_addr->message :
2572 (shadow_addr->basic_errno <= 0)? US"unknown error" : US"");
2574 DEBUG(D_deliver|D_transport)
2575 debug_printf("%s shadow transport returned %s for %s\n",
2577 (sresult == OK)? "OK" :
2578 (sresult == DEFER)? "DEFER" :
2579 (sresult == FAIL)? "FAIL" :
2580 (sresult == PANIC)? "PANIC" : "?",
2581 shadow_addr->address);
2584 DEBUG(D_deliver|D_transport)
2585 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2587 transport_count = save_count; /* Restore original transport count */
2591 /* Cancel the expansions that were set up for the delivery. */
2593 deliver_set_expansions(NULL);
2595 /* Now we can process the results of the real transport. We must take each
2596 address off the chain first, because post_process_one() puts it on another
2599 for (addr2 = addr; addr2 != NULL; addr2 = nextaddr)
2601 int result = addr2->transport_return;
2602 nextaddr = addr2->next;
2604 DEBUG(D_deliver|D_transport)
2605 debug_printf("%s transport returned %s for %s\n",
2607 (result == OK)? "OK" :
2608 (result == DEFER)? "DEFER" :
2609 (result == FAIL)? "FAIL" :
2610 (result == PANIC)? "PANIC" : "?",
2613 /* If there is a retry_record, or if delivery is deferred, build a retry
2614 item for setting a new retry time or deleting the old retry record from
2615 the database. These items are handled all together after all addresses
2616 have been handled (so the database is open just for a short time for
2619 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
2621 int flags = (result == DEFER)? 0 : rf_delete;
2622 uschar *retry_key = string_copy((tp->retry_use_local_part)?
2623 addr2->address_retry_key : addr2->domain_retry_key);
2625 retry_add_item(addr2, retry_key, flags);
2628 /* Done with this address */
2630 if (result == OK) addr2->more_errno = deliver_time;
2631 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
2633 /* If a pipe delivery generated text to be sent back, the result may be
2634 changed to FAIL, and we must copy this for subsequent addresses in the
2637 if (addr2->transport_return != result)
2639 for (addr3 = nextaddr; addr3 != NULL; addr3 = addr3->next)
2641 addr3->transport_return = addr2->transport_return;
2642 addr3->basic_errno = addr2->basic_errno;
2643 addr3->message = addr2->message;
2645 result = addr2->transport_return;
2648 /* Whether or not the result was changed to FAIL, we need to copy the
2649 return_file value from the first address into all the addresses of the
2650 batch, so they are all listed in the error message. */
2652 addr2->return_file = addr->return_file;
2654 /* Change log character for recording successful deliveries. */
2656 if (result == OK) logchar = '-';
2658 } /* Loop back for next batch of addresses */
2664 /*************************************************
2665 * Sort remote deliveries *
2666 *************************************************/
2668 /* This function is called if remote_sort_domains is set. It arranges that the
2669 chain of addresses for remote deliveries is ordered according to the strings
2670 specified. Try to make this shuffling reasonably efficient by handling
2671 sequences of addresses rather than just single ones.
2678 sort_remote_deliveries(void)
2681 address_item **aptr = &addr_remote;
2682 uschar *listptr = remote_sort_domains;
2686 while (*aptr != NULL &&
2687 (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
2690 address_item *moved = NULL;
2691 address_item **bptr = &moved;
2693 while (*aptr != NULL)
2695 address_item **next;
2696 deliver_domain = (*aptr)->domain; /* set $domain */
2697 if (match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1,
2698 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
2700 aptr = &((*aptr)->next);
2704 next = &((*aptr)->next);
2705 while (*next != NULL &&
2706 (deliver_domain = (*next)->domain, /* Set $domain */
2707 match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1,
2708 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK)
2709 next = &((*next)->next);
2711 /* If the batch of non-matchers is at the end, add on any that were
2712 extracted further up the chain, and end this iteration. Otherwise,
2713 extract them from the chain and hang on the moved chain. */
2725 aptr = &((*aptr)->next);
2728 /* If the loop ended because the final address matched, *aptr will
2729 be NULL. Add on to the end any extracted non-matching addresses. If
2730 *aptr is not NULL, the loop ended via "break" when *next is null, that
2731 is, there was a string of non-matching addresses at the end. In this
2732 case the extracted addresses have already been added on the end. */
2734 if (*aptr == NULL) *aptr = moved;
2740 debug_printf("remote addresses after sorting:\n");
2741 for (addr = addr_remote; addr != NULL; addr = addr->next)
2742 debug_printf(" %s\n", addr->address);
2748 /*************************************************
2749 * Read from pipe for remote delivery subprocess *
2750 *************************************************/
2752 /* This function is called when the subprocess is complete, but can also be
2753 called before it is complete, in order to empty a pipe that is full (to prevent
2754 deadlock). It must therefore keep track of its progress in the parlist data
2757 We read the pipe to get the delivery status codes and a possible error message
2758 for each address, optionally preceded by unusability data for the hosts and
2759 also by optional retry data.
2761 Read in large chunks into the big buffer and then scan through, interpreting
2762 the data therein. In most cases, only a single read will be necessary. No
2763 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
2764 that we read the next chunk when there is less than 2500 bytes left in the
2765 non-final chunk, we can assume each item is complete in the buffer before
2766 handling it. Each item is written using a single write(), which is atomic for
2767 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
2768 often bigger) so even if we are reading while the subprocess is still going, we
2769 should never have only a partial item in the buffer.
2772 poffset the offset of the parlist item
2773 eop TRUE if the process has completed
2775 Returns: TRUE if the terminating 'Z' item has been read,
2776 or there has been a disaster (i.e. no more data needed);
2781 par_read_pipe(int poffset, BOOL eop)
2784 pardata *p = parlist + poffset;
2785 address_item *addrlist = p->addrlist;
2786 address_item *addr = p->addr;
2789 uschar *endptr = big_buffer;
2790 uschar *ptr = endptr;
2791 uschar *msg = p->msg;
2792 BOOL done = p->done;
2793 BOOL unfinished = TRUE;
2795 /* Loop through all items, reading from the pipe when necessary. The pipe
2796 is set up to be non-blocking, but there are two different Unix mechanisms in
2797 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
2798 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
2799 which returns 0 for both end of file and no more data. We distinguish the
2800 two cases by taking 0 as end of file only when we know the process has
2803 Each separate item is written to the pipe in a single write(), and as they are
2804 all short items, the writes will all be atomic and we should never find
2805 ourselves in the position of having read an incomplete item. "Short" in this
2806 case can mean up to about 1K in the case when there is a long error message
2807 associated with an address. */
2809 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
2810 (int)p->pid, eop? "ended" : "not ended");
2814 retry_item *r, **rp;
2815 int remaining = endptr - ptr;
2817 /* Read (first time) or top up the chars in the buffer if necessary.
2818 There will be only one read if we get all the available data (i.e. don't
2819 fill the buffer completely). */
2821 if (remaining < 2500 && unfinished)
2824 int available = big_buffer_size - remaining;
2826 if (remaining > 0) memmove(big_buffer, ptr, remaining);
2829 endptr = big_buffer + remaining;
2830 len = read(fd, endptr, available);
2832 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
2834 /* If the result is EAGAIN and the process is not complete, just
2835 stop reading any more and process what we have already. */
2839 if (!eop && errno == EAGAIN) len = 0; else
2841 msg = string_sprintf("failed to read pipe from transport process "
2842 "%d for transport %s: %s", pid, addr->transport->driver_name,
2848 /* If the length is zero (eof or no-more-data), just process what we
2849 already have. Note that if the process is still running and we have
2850 read all the data in the pipe (but less that "available") then we
2851 won't read any more, as "unfinished" will get set FALSE. */
2854 unfinished = len == available;
2857 /* If we are at the end of the available data, exit the loop. */
2859 if (ptr >= endptr) break;
2861 /* Handle each possible type of item, assuming the complete item is
2862 available in store. */
2866 /* Host items exist only if any hosts were marked unusable. Match
2867 up by checking the IP address. */
2870 for (h = addrlist->host_list; h != NULL; h = h->next)
2872 if (h->address == NULL || Ustrcmp(h->address, ptr+2) != 0) continue;
2880 /* Retry items are sent in a preceding R item for each address. This is
2881 kept separate to keep each message short enough to guarantee it won't
2882 be split in the pipe. Hopefully, in the majority of cases, there won't in
2883 fact be any retry items at all.
2885 The complete set of retry items might include an item to delete a
2886 routing retry if there was a previous routing delay. However, routing
2887 retries are also used when a remote transport identifies an address error.
2888 In that case, there may also be an "add" item for the same key. Arrange
2889 that a "delete" item is dropped in favour of an "add" item. */
2892 if (addr == NULL) goto ADDR_MISMATCH;
2894 DEBUG(D_deliver|D_retry)
2895 debug_printf("reading retry information for %s from subprocess\n",
2898 /* Cut out any "delete" items on the list. */
2900 for (rp = &(addr->retries); (r = *rp) != NULL; rp = &(r->next))
2902 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
2904 if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */
2905 *rp = r->next; /* Excise a delete item */
2906 DEBUG(D_deliver|D_retry)
2907 debug_printf(" existing delete item dropped\n");
2911 /* We want to add a delete item only if there is no non-delete item;
2912 however we still have to step ptr through the data. */
2914 if (r == NULL || (*ptr & rf_delete) == 0)
2916 r = store_get(sizeof(retry_item));
2917 r->next = addr->retries;
2920 r->key = string_copy(ptr);
2922 memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno));
2923 ptr += sizeof(r->basic_errno);
2924 memcpy(&(r->more_errno), ptr, sizeof(r->more_errno));
2925 ptr += sizeof(r->more_errno);
2926 r->message = (*ptr)? string_copy(ptr) : NULL;
2927 DEBUG(D_deliver|D_retry)
2928 debug_printf(" added %s item\n",
2929 ((r->flags & rf_delete) == 0)? "retry" : "delete");
2934 DEBUG(D_deliver|D_retry)
2935 debug_printf(" delete item not added: non-delete item exists\n");
2938 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
2944 /* Put the amount of data written into the parlist block */
2947 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
2948 ptr += sizeof(transport_count);
2951 /* Address items are in the order of items on the address chain. We
2952 remember the current address value in case this function is called
2953 several times to empty the pipe in stages. Information about delivery
2954 over TLS is sent in a preceding X item for each address. We don't put
2955 it in with the other info, in order to keep each message short enough to
2956 guarantee it won't be split in the pipe. */
2960 if (addr == NULL) goto ADDR_MISMATCH; /* Below, in 'A' handler */
2961 addr->cipher = (*ptr)? string_copy(ptr) : NULL;
2963 addr->peerdn = (*ptr)? string_copy(ptr) : NULL;
2968 case 'C': /* client authenticator information */
2972 addr->authenticator = (*ptr)? string_copy(ptr) : NULL;
2975 addr->auth_id = (*ptr)? string_copy(ptr) : NULL;
2978 addr->auth_sndr = (*ptr)? string_copy(ptr) : NULL;
2984 #ifdef EXPERIMENTAL_PRDR
2986 addr->flags |= af_prdr_used; break;
2993 msg = string_sprintf("address count mismatch for data read from pipe "
2994 "for transport process %d for transport %s", pid,
2995 addrlist->transport->driver_name);
3000 addr->transport_return = *ptr++;
3001 addr->special_action = *ptr++;
3002 memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno));
3003 ptr += sizeof(addr->basic_errno);
3004 memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno));
3005 ptr += sizeof(addr->more_errno);
3006 memcpy(&(addr->flags), ptr, sizeof(addr->flags));
3007 ptr += sizeof(addr->flags);
3008 addr->message = (*ptr)? string_copy(ptr) : NULL;
3010 addr->user_message = (*ptr)? string_copy(ptr) : NULL;
3013 /* Always two strings for host information, followed by the port number */
3017 h = store_get(sizeof(host_item));
3018 h->name = string_copy(ptr);
3020 h->address = string_copy(ptr);
3022 memcpy(&(h->port), ptr, sizeof(h->port));
3023 ptr += sizeof(h->port);
3024 addr->host_used = h;
3028 /* Finished with this address */
3033 /* Z marks the logical end of the data. It is followed by '0' if
3034 continue_transport was NULL at the end of transporting, otherwise '1'.
3035 We need to know when it becomes NULL during a delivery down a passed SMTP
3036 channel so that we don't try to pass anything more down it. Of course, for
3037 most normal messages it will remain NULL all the time. */
3042 continue_transport = NULL;
3043 continue_hostname = NULL;
3046 DEBUG(D_deliver) debug_printf("Z%c item read\n", *ptr);
3049 /* Anything else is a disaster. */
3052 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3053 "process %d for transport %s", ptr[-1], pid,
3054 addr->transport->driver_name);
3060 /* The done flag is inspected externally, to determine whether or not to
3061 call the function again when the process finishes. */
3065 /* If the process hadn't finished, and we haven't seen the end of the data
3066 or suffered a disaster, update the rest of the state, and return FALSE to
3067 indicate "not finished". */
3076 /* Close our end of the pipe, to prevent deadlock if the far end is still
3077 pushing stuff into it. */
3082 /* If we have finished without error, but haven't had data for every address,
3083 something is wrong. */
3085 if (msg == NULL && addr != NULL)
3086 msg = string_sprintf("insufficient address data read from pipe "
3087 "for transport process %d for transport %s", pid,
3088 addr->transport->driver_name);
3090 /* If an error message is set, something has gone wrong in getting back
3091 the delivery data. Put the message into each address and freeze it. */
3095 for (addr = addrlist; addr != NULL; addr = addr->next)
3097 addr->transport_return = DEFER;
3098 addr->special_action = SPECIAL_FREEZE;
3099 addr->message = msg;
3103 /* Return TRUE to indicate we have got all we need from this process, even
3104 if it hasn't actually finished yet. */
3111 /*************************************************
3112 * Post-process a set of remote addresses *
3113 *************************************************/
3115 /* Do what has to be done immediately after a remote delivery for each set of
3116 addresses, then re-write the spool if necessary. Note that post_process_one
3117 puts the address on an appropriate queue; hence we must fish off the next
3118 one first. This function is also called if there is a problem with setting
3119 up a subprocess to do a remote delivery in parallel. In this case, the final
3120 argument contains a message, and the action must be forced to DEFER.
3123 addr pointer to chain of address items
3124 logflags flags for logging
3125 msg NULL for normal cases; -> error message for unexpected problems
3126 fallback TRUE if processing fallback hosts
3132 remote_post_process(address_item *addr, int logflags, uschar *msg,
3137 /* If any host addresses were found to be unusable, add them to the unusable
3138 tree so that subsequent deliveries don't try them. */
3140 for (h = addr->host_list; h != NULL; h = h->next)
3142 if (h->address == NULL) continue;
3143 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3146 /* Now handle each address on the chain. The transport has placed '=' or '-'
3147 into the special_action field for each successful delivery. */
3149 while (addr != NULL)
3151 address_item *next = addr->next;
3153 /* If msg == NULL (normal processing) and the result is DEFER and we are
3154 processing the main hosts and there are fallback hosts available, put the
3155 address on the list for fallback delivery. */
3157 if (addr->transport_return == DEFER &&
3158 addr->fallback_hosts != NULL &&
3162 addr->host_list = addr->fallback_hosts;
3163 addr->next = addr_fallback;
3164 addr_fallback = addr;
3165 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3168 /* If msg is set (=> unexpected problem), set it in the address before
3169 doing the ordinary post processing. */
3175 addr->message = msg;
3176 addr->transport_return = DEFER;
3178 (void)post_process_one(addr, addr->transport_return, logflags,
3179 DTYPE_TRANSPORT, addr->special_action);
3187 /* If we have just delivered down a passed SMTP channel, and that was
3188 the last address, the channel will have been closed down. Now that
3189 we have logged that delivery, set continue_sequence to 1 so that
3190 any subsequent deliveries don't get "*" incorrectly logged. */
3192 if (continue_transport == NULL) continue_sequence = 1;
3197 /*************************************************
3198 * Wait for one remote delivery subprocess *
3199 *************************************************/
3201 /* This function is called while doing remote deliveries when either the
3202 maximum number of processes exist and we need one to complete so that another
3203 can be created, or when waiting for the last ones to complete. It must wait for
3204 the completion of one subprocess, empty the control block slot, and return a
3205 pointer to the address chain.
3208 Returns: pointer to the chain of addresses handled by the process;
3209 NULL if no subprocess found - this is an unexpected error
3212 static address_item *
3215 int poffset, status;
3216 address_item *addr, *addrlist;
3219 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3220 "to finish", message_id);
3222 /* Loop until either a subprocess completes, or there are no subprocesses in
3223 existence - in which case give an error return. We cannot proceed just by
3224 waiting for a completion, because a subprocess may have filled up its pipe, and
3225 be waiting for it to be emptied. Therefore, if no processes have finished, we
3226 wait for one of the pipes to acquire some data by calling select(), with a
3227 timeout just in case.
3229 The simple approach is just to iterate after reading data from a ready pipe.
3230 This leads to non-ideal behaviour when the subprocess has written its final Z
3231 item, closed the pipe, and is in the process of exiting (the common case). A
3232 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3233 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3236 To avoid this, if all the data that is needed has been read from a subprocess
3237 after select(), an explicit wait() for it is done. We know that all it is doing
3238 is writing to the pipe and then exiting, so the wait should not be long.
3240 The non-blocking waitpid() is to some extent just insurance; if we could
3241 reliably detect end-of-file on the pipe, we could always know when to do a
3242 blocking wait() for a completed process. However, because some systems use
3243 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3244 use code that functions without the need to recognize EOF.
3246 There's a double loop here just in case we end up with a process that is not in
3247 the list of remote delivery processes. Something has obviously gone wrong if
3248 this is the case. (For example, a process that is incorrectly left over from
3249 routing or local deliveries might be found.) The damage can be minimized by
3250 looping back and looking for another process. If there aren't any, the error
3251 return will happen. */
3253 for (;;) /* Normally we do not repeat this loop */
3255 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3258 fd_set select_pipes;
3259 int maxpipe, readycount;
3261 /* A return value of -1 can mean several things. If errno != ECHILD, it
3262 either means invalid options (which we discount), or that this process was
3263 interrupted by a signal. Just loop to try the waitpid() again.
3265 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3266 in existence. This should never happen, and is an unexpected error.
3267 However, there is a nasty complication when running under Linux. If "strace
3268 -f" is being used under Linux to trace this process and its children,
3269 subprocesses are "stolen" from their parents and become the children of the
3270 tracing process. A general wait such as the one we've just obeyed returns
3271 as if there are no children while subprocesses are running. Once a
3272 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3273 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3276 This does not happen using "truss" on Solaris, nor (I think) with other
3277 tracing facilities on other OS. It seems to be specific to Linux.
3279 What we do to get round this is to use kill() to see if any of our
3280 subprocesses are still in existence. If kill() gives an OK return, we know
3281 it must be for one of our processes - it can't be for a re-use of the pid,
3282 because if our process had finished, waitpid() would have found it. If any
3283 of our subprocesses are in existence, we proceed to use select() as if
3284 waitpid() had returned zero. I think this is safe. */
3288 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3291 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3292 "for process existence\n");
3294 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3296 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3298 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3299 "stolen by strace\n", (int)pid);
3300 break; /* With poffset set */
3304 if (poffset >= remote_max_parallel)
3306 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3307 return NULL; /* This is the error return */
3311 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3312 been handled above. A return value of zero means that there is at least one
3313 subprocess, but there are no completed subprocesses. See if any pipes are
3314 ready with any data for reading. */
3316 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3319 FD_ZERO(&select_pipes);
3320 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3322 if (parlist[poffset].pid != 0)
3324 int fd = parlist[poffset].fd;
3325 FD_SET(fd, &select_pipes);
3326 if (fd > maxpipe) maxpipe = fd;
3330 /* Stick in a 60-second timeout, just in case. */
3335 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3338 /* Scan through the pipes and read any that are ready; use the count
3339 returned by select() to stop when there are no more. Select() can return
3340 with no processes (e.g. if interrupted). This shouldn't matter.
3342 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3343 read, or there was a disaster. In either case, we are finished with this
3344 process. Do an explicit wait() for the process and break the main loop if
3347 It turns out that we have to deal with the case of an interrupted system
3348 call, which can happen on some operating systems if the signal handling is
3349 set up to do that by default. */
3352 readycount > 0 && poffset < remote_max_parallel;
3355 if ((pid = parlist[poffset].pid) != 0 &&
3356 FD_ISSET(parlist[poffset].fd, &select_pipes))
3359 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3361 for (;;) /* Loop for signals */
3363 pid_t endedpid = waitpid(pid, &status, 0);
3364 if (endedpid == pid) goto PROCESS_DONE;
3365 if (endedpid != (pid_t)(-1) || errno != EINTR)
3366 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3367 "%d (errno = %d) from waitpid() for process %d",
3368 (int)endedpid, errno, (int)pid);
3374 /* Now go back and look for a completed subprocess again. */
3377 /* A completed process was detected by the non-blocking waitpid(). Find the
3378 data block that corresponds to this subprocess. */
3380 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3381 if (pid == parlist[poffset].pid) break;
3383 /* Found the data block; this is a known remote delivery process. We don't
3384 need to repeat the outer loop. This should be what normally happens. */
3386 if (poffset < remote_max_parallel) break;
3388 /* This situation is an error, but it's probably better to carry on looking
3389 for another process than to give up (as we used to do). */
3391 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
3392 "transport process list", pid);
3393 } /* End of the "for" loop */
3395 /* Come here when all the data was completely read after a select(), and
3396 the process in pid has been wait()ed for. */
3403 debug_printf("remote delivery process %d ended\n", (int)pid);
3405 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
3409 set_process_info("delivering %s", message_id);
3411 /* Get the chain of processed addresses */
3413 addrlist = parlist[poffset].addrlist;
3415 /* If the process did not finish cleanly, record an error and freeze (except
3416 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3417 in case the delivery did actually happen. */
3419 if ((status & 0xffff) != 0)
3422 int msb = (status >> 8) & 255;
3423 int lsb = status & 255;
3424 int code = (msb == 0)? (lsb & 0x7f) : msb;
3426 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
3428 addrlist->transport->driver_name,
3430 (msb == 0)? "terminated by signal" : "exit code",
3433 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
3434 addrlist->special_action = SPECIAL_FREEZE;
3436 for (addr = addrlist; addr != NULL; addr = addr->next)
3438 addr->transport_return = DEFER;
3439 addr->message = msg;
3442 remove_journal = FALSE;
3445 /* Else complete reading the pipe to get the result of the delivery, if all
3446 the data has not yet been obtained. */
3448 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
3450 /* Put the data count and return path into globals, mark the data slot unused,
3451 decrement the count of subprocesses, and return the address chain. */
3453 transport_count = parlist[poffset].transport_count;
3454 used_return_path = parlist[poffset].return_path;
3455 parlist[poffset].pid = 0;
3462 /*************************************************
3463 * Wait for subprocesses and post-process *
3464 *************************************************/
3466 /* This function waits for subprocesses until the number that are still running
3467 is below a given threshold. For each complete subprocess, the addresses are
3468 post-processed. If we can't find a running process, there is some shambles.
3469 Better not bomb out, as that might lead to multiple copies of the message. Just
3470 log and proceed as if all done.
3473 max maximum number of subprocesses to leave running
3474 fallback TRUE if processing fallback hosts
3480 par_reduce(int max, BOOL fallback)
3482 while (parcount > max)
3484 address_item *doneaddr = par_wait();
3485 if (doneaddr == NULL)
3487 log_write(0, LOG_MAIN|LOG_PANIC,
3488 "remote delivery process count got out of step");
3491 else remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
3499 rmt_dlv_checked_write(int fd, void * buf, int size)
3501 int ret = write(fd, buf, size);
3503 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed writing transport result to pipe: %s\n",
3504 ret == -1 ? strerror(errno) : "short write");
3507 /*************************************************
3508 * Do remote deliveries *
3509 *************************************************/
3511 /* This function is called to process the addresses in addr_remote. We must
3512 pick off the queue all addresses that have the same transport, remote
3513 destination, and errors address, and hand them to the transport in one go,
3514 subject to some configured limitations. If this is a run to continue delivering
3515 to an existing delivery channel, skip all but those addresses that can go to
3516 that channel. The skipped addresses just get deferred.
3518 If mua_wrapper is set, all addresses must be able to be sent in a single
3519 transaction. If not, this function yields FALSE.
3521 In Exim 4, remote deliveries are always done in separate processes, even
3522 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
3523 is so that the base process can retain privilege. This makes the
3524 implementation of fallback transports feasible (though not initially done.)
3526 We create up to the configured number of subprocesses, each of which passes
3527 back the delivery state via a pipe. (However, when sending down an existing
3528 connection, remote_max_parallel is forced to 1.)
3531 fallback TRUE if processing fallback hosts
3533 Returns: TRUE normally
3534 FALSE if mua_wrapper is set and the addresses cannot all be sent
3539 do_remote_deliveries(BOOL fallback)
3545 parcount = 0; /* Number of executing subprocesses */
3547 /* When sending down an existing channel, only do one delivery at a time.
3548 We use a local variable (parmax) to hold the maximum number of processes;
3549 this gets reduced from remote_max_parallel if we can't create enough pipes. */
3551 if (continue_transport != NULL) remote_max_parallel = 1;
3552 parmax = remote_max_parallel;
3554 /* If the data for keeping a list of processes hasn't yet been
3557 if (parlist == NULL)
3559 parlist = store_get(remote_max_parallel * sizeof(pardata));
3560 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3561 parlist[poffset].pid = 0;
3564 /* Now loop for each remote delivery */
3566 for (delivery_count = 0; addr_remote != NULL; delivery_count++)
3572 int address_count = 1;
3573 int address_count_max;
3575 BOOL use_initgroups;
3576 BOOL pipe_done = FALSE;
3577 transport_instance *tp;
3578 address_item **anchor = &addr_remote;
3579 address_item *addr = addr_remote;
3580 address_item *last = addr;
3583 /* Pull the first address right off the list. */
3585 addr_remote = addr->next;
3588 DEBUG(D_deliver|D_transport)
3589 debug_printf("--------> %s <--------\n", addr->address);
3591 /* If no transport has been set, there has been a big screw-up somewhere. */
3593 if ((tp = addr->transport) == NULL)
3595 disable_logging = FALSE; /* Jic */
3596 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3597 US"No transport set by router", fallback);
3601 /* Check that this base address hasn't previously been delivered to this
3602 transport. The check is necessary at this point to handle homonymic addresses
3603 correctly in cases where the pattern of redirection changes between delivery
3604 attempts. Non-homonymic previous delivery is detected earlier, at routing
3607 if (previously_transported(addr, FALSE)) continue;
3609 /* Force failure if the message is too big. */
3611 if (tp->message_size_limit != NULL)
3613 int rc = check_message_size(tp, addr);
3616 addr->transport_return = rc;
3617 remote_post_process(addr, LOG_MAIN, NULL, fallback);
3622 /* Get the flag which specifies whether the transport can handle different
3623 domains that nevertheless resolve to the same set of hosts. */
3625 multi_domain = tp->multi_domain;
3627 /* Get the maximum it can handle in one envelope, with zero meaning
3628 unlimited, which is forced for the MUA wrapper case. */
3630 address_count_max = tp->max_addresses;
3631 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
3634 /************************************************************************/
3635 /***** This is slightly experimental code, but should be safe. *****/
3637 /* The address_count_max value is the maximum number of addresses that the
3638 transport can send in one envelope. However, the transport must be capable of
3639 dealing with any number of addresses. If the number it gets exceeds its
3640 envelope limitation, it must send multiple copies of the message. This can be
3641 done over a single connection for SMTP, so uses less resources than making
3642 multiple connections. On the other hand, if remote_max_parallel is greater
3643 than one, it is perhaps a good idea to use parallel processing to move the
3644 message faster, even if that results in multiple simultaneous connections to
3647 How can we come to some compromise between these two ideals? What we do is to
3648 limit the number of addresses passed to a single instance of a transport to
3649 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
3650 number of addresses routed to remote transports divided by
3651 remote_max_parallel. For example, if the message has 100 remote recipients,
3652 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
3653 once. But if rcpt_max is 100, we could send up to 100.
3655 Of course, not all the remotely addresses in a message are going to go to the
3656 same set of hosts (except in smarthost configurations), so this is just a
3657 heuristic way of dividing up the work.
3659 Furthermore (1), because this may not be wanted in some cases, and also to
3660 cope with really pathological cases, there is also a limit to the number of
3661 messages that are sent over one connection. This is the same limit that is
3662 used when sending several different messages over the same connection.
3663 Continue_sequence is set when in this situation, to the number sent so
3664 far, including this message.
3666 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
3667 is probably because they are using VERP, in which case they want to pass only
3668 one address at a time to the transport, in order to be able to use
3669 $local_part and $domain in constructing a new return path. We could test for
3670 the use of these variables, but as it is so likely they will be used when the
3671 maximum is 1, we don't bother. Just leave the value alone. */
3673 if (address_count_max != 1 &&
3674 address_count_max < remote_delivery_count/remote_max_parallel)
3676 int new_max = remote_delivery_count/remote_max_parallel;
3677 int message_max = tp->connection_max_messages;
3678 if (connection_max_messages >= 0) message_max = connection_max_messages;
3679 message_max -= continue_sequence - 1;
3680 if (message_max > 0 && new_max > address_count_max * message_max)
3681 new_max = address_count_max * message_max;
3682 address_count_max = new_max;
3685 /************************************************************************/
3688 /* Pick off all addresses which have the same transport, errors address,
3689 destination, and extra headers. In some cases they point to the same host
3690 list, but we also need to check for identical host lists generated from
3691 entirely different domains. The host list pointers can be NULL in the case
3692 where the hosts are defined in the transport. There is also a configured
3693 maximum limit of addresses that can be handled at once (see comments above
3694 for how it is computed). */
3696 while ((next = *anchor) != NULL && address_count < address_count_max)
3698 if ((multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
3700 tp == next->transport
3702 same_hosts(next->host_list, addr->host_list)
3704 same_strings(next->p.errors_address, addr->p.errors_address)
3706 same_headers(next->p.extra_headers, addr->p.extra_headers)
3708 same_ugid(tp, next, addr)
3710 (next->p.remove_headers == addr->p.remove_headers ||
3711 (next->p.remove_headers != NULL &&
3712 addr->p.remove_headers != NULL &&
3713 Ustrcmp(next->p.remove_headers, addr->p.remove_headers) == 0)))
3715 *anchor = next->next;
3717 next->first = addr; /* remember top one (for retry processing) */
3722 else anchor = &(next->next);
3725 /* If we are acting as an MUA wrapper, all addresses must go in a single
3726 transaction. If not, put them back on the chain and yield FALSE. */
3728 if (mua_wrapper && addr_remote != NULL)
3730 last->next = addr_remote;
3735 /* Set up the expansion variables for this set of addresses */
3737 deliver_set_expansions(addr);
3739 /* Ensure any transport-set auth info is fresh */
3740 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
3742 /* Compute the return path, expanding a new one if required. The old one
3743 must be set first, as it might be referred to in the expansion. */
3745 if(addr->p.errors_address != NULL)
3746 return_path = addr->p.errors_address;
3747 #ifdef EXPERIMENTAL_SRS
3748 else if(addr->p.srs_sender != NULL)
3749 return_path = addr->p.srs_sender;
3752 return_path = sender_address;
3754 if (tp->return_path != NULL)
3756 uschar *new_return_path = expand_string(tp->return_path);
3757 if (new_return_path == NULL)
3759 if (!expand_string_forcedfail)
3761 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3762 string_sprintf("Failed to expand return path \"%s\": %s",
3763 tp->return_path, expand_string_message), fallback);
3767 else return_path = new_return_path;
3770 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
3771 logs and sets up error messages, so we just post-process and continue with
3772 the next address. */
3774 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
3776 remote_post_process(addr, LOG_MAIN|LOG_PANIC, NULL, fallback);
3780 /* If this transport has a setup function, call it now so that it gets
3781 run in this process and not in any subprocess. That way, the results of
3782 any setup that are retained by the transport can be reusable. One of the
3783 things the setup does is to set the fallback host lists in the addresses.
3784 That is why it is called at this point, before the continue delivery
3785 processing, because that might use the fallback hosts. */
3787 if (tp->setup != NULL)
3788 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
3790 /* If this is a run to continue delivery down an already-established
3791 channel, check that this set of addresses matches the transport and
3792 the channel. If it does not, defer the addresses. If a host list exists,
3793 we must check that the continue host is on the list. Otherwise, the
3794 host is set in the transport. */
3796 continue_more = FALSE; /* In case got set for the last lot */
3797 if (continue_transport != NULL)
3799 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
3800 if (ok && addr->host_list != NULL)
3804 for (h = addr->host_list; h != NULL; h = h->next)
3806 if (Ustrcmp(h->name, continue_hostname) == 0)
3807 { ok = TRUE; break; }
3811 /* Addresses not suitable; defer or queue for fallback hosts (which
3812 might be the continue host) and skip to next address. */
3816 DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n");
3819 if (addr->fallback_hosts != NULL && !fallback)
3823 next->host_list = next->fallback_hosts;
3824 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
3825 if (next->next == NULL) break;
3828 next->next = addr_fallback;
3829 addr_fallback = addr;
3834 while (next->next != NULL) next = next->next;
3835 next->next = addr_defer;
3842 /* Set a flag indicating whether there are further addresses that list
3843 the continued host. This tells the transport to leave the channel open,
3844 but not to pass it to another delivery process. */
3846 for (next = addr_remote; next != NULL; next = next->next)
3849 for (h = next->host_list; h != NULL; h = h->next)
3851 if (Ustrcmp(h->name, continue_hostname) == 0)
3852 { continue_more = TRUE; break; }
3857 /* The transports set up the process info themselves as they may connect
3858 to more than one remote machine. They also have to set up the filter
3859 arguments, if required, so that the host name and address are available
3862 transport_filter_argv = NULL;
3864 /* Create the pipe for inter-process communication. If pipe creation
3865 fails, it is probably because the value of remote_max_parallel is so
3866 large that too many file descriptors for pipes have been created. Arrange
3867 to wait for a process to finish, and then try again. If we still can't
3868 create a pipe when all processes have finished, break the retry loop. */
3872 if (pipe(pfd) == 0) pipe_done = TRUE;
3873 else if (parcount > 0) parmax = parcount;
3876 /* We need to make the reading end of the pipe non-blocking. There are
3877 two different options for this. Exim is cunningly (I hope!) coded so
3878 that it can use either of them, though it prefers O_NONBLOCK, which
3879 distinguishes between EOF and no-more-data. */
3882 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
3884 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
3887 /* If the maximum number of subprocesses already exist, wait for a process
3888 to finish. If we ran out of file descriptors, parmax will have been reduced
3889 from its initial value of remote_max_parallel. */
3891 par_reduce(parmax - 1, fallback);
3894 /* If we failed to create a pipe and there were no processes to wait
3895 for, we have to give up on this one. Do this outside the above loop
3896 so that we can continue the main loop. */
3900 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3901 string_sprintf("unable to create pipe: %s", strerror(errno)), fallback);
3905 /* Find a free slot in the pardata list. Must do this after the possible
3906 waiting for processes to finish, because a terminating process will free
3909 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3910 if (parlist[poffset].pid == 0) break;
3912 /* If there isn't one, there has been a horrible disaster. */
3914 if (poffset >= remote_max_parallel)
3916 (void)close(pfd[pipe_write]);
3917 (void)close(pfd[pipe_read]);
3918 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3919 US"Unexpectedly no free subprocess slot", fallback);
3923 /* Now fork a subprocess to do the remote delivery, but before doing so,
3924 ensure that any cached resourses are released so as not to interfere with
3925 what happens in the subprocess. */
3929 if ((pid = fork()) == 0)
3931 int fd = pfd[pipe_write];
3934 /* Setting this global in the subprocess means we need never clear it */
3935 transport_name = tp->name;
3937 /* There are weird circumstances in which logging is disabled */
3938 disable_logging = tp->disable_logging;
3940 /* Show pids on debug output if parallelism possible */
3942 if (parmax > 1 && (parcount > 0 || addr_remote != NULL))
3944 DEBUG(D_any|D_v) debug_selector |= D_pid;
3945 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
3948 /* Reset the random number generator, so different processes don't all
3949 have the same sequence. In the test harness we want different, but
3950 predictable settings for each delivery process, so do something explicit
3951 here rather they rely on the fixed reset in the random number function. */
3953 random_seed = running_in_test_harness? 42 + 2*delivery_count : 0;
3955 /* Set close-on-exec on the pipe so that it doesn't get passed on to
3956 a new process that may be forked to do another delivery down the same
3959 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
3961 /* Close open file descriptors for the pipes of other processes
3962 that are running in parallel. */
3964 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3965 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
3967 /* This process has inherited a copy of the file descriptor
3968 for the data file, but its file pointer is shared with all the
3969 other processes running in parallel. Therefore, we have to re-open
3970 the file in order to get a new file descriptor with its own
3971 file pointer. We don't need to lock it, as the lock is held by
3972 the parent process. There doesn't seem to be any way of doing
3973 a dup-with-new-file-pointer. */
3975 (void)close(deliver_datafile);
3976 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir,
3978 deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0);
3980 if (deliver_datafile < 0)
3981 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
3982 "parallel delivery: %s", spoolname, strerror(errno));
3984 /* Set the close-on-exec flag */
3986 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
3989 /* Set the uid/gid of this process; bombs out on failure. */
3991 exim_setugid(uid, gid, use_initgroups,
3992 string_sprintf("remote delivery to %s with transport=%s",
3993 addr->address, tp->name));
3995 /* Close the unwanted half of this process' pipe, set the process state,
3996 and run the transport. Afterwards, transport_count will contain the number
3997 of bytes written. */
3999 (void)close(pfd[pipe_read]);
4000 set_process_info("delivering %s using %s", message_id, tp->name);
4001 debug_print_string(tp->debug_string);
4002 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4004 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4005 message_id, tp->name, addr->address, (addr->next == NULL)? "" : ", ...");
4007 /* Ensure any cached resources that we used are now released */
4011 /* Pass the result back down the pipe. This is a lot more information
4012 than is needed for a local delivery. We have to send back the error
4013 status for each address, the usability status for each host that is
4014 flagged as unusable, and all the retry items. When TLS is in use, we
4015 send also the cipher and peerdn information. Each type of information
4016 is flagged by an identifying byte, and is then in a fixed format (with
4017 strings terminated by zeros), and there is a final terminator at the
4018 end. The host information and retry information is all attached to
4019 the first address, so that gets sent at the start. */
4021 /* Host unusability information: for most success cases this will
4024 for (h = addr->host_list; h != NULL; h = h->next)
4026 if (h->address == NULL || h->status < hstatus_unusable) continue;
4027 sprintf(CS big_buffer, "H%c%c%s", h->status, h->why, h->address);
4028 rmt_dlv_checked_write(fd, big_buffer, Ustrlen(big_buffer+3) + 4);
4031 /* The number of bytes written. This is the same for each address. Even
4032 if we sent several copies of the message down the same connection, the
4033 size of each one is the same, and it's that value we have got because
4034 transport_count gets reset before calling transport_write_message(). */
4036 big_buffer[0] = 'S';
4037 memcpy(big_buffer+1, &transport_count, sizeof(transport_count));
4038 rmt_dlv_checked_write(fd, big_buffer, sizeof(transport_count) + 1);
4040 /* Information about what happened to each address. Four item types are
4041 used: an optional 'X' item first, for TLS information, then an optional "C"
4042 item for any client-auth info followed by 'R' items for any retry settings,
4043 and finally an 'A' item for the remaining data. */
4045 for(; addr != NULL; addr = addr->next)
4050 /* The certificate verification status goes into the flags */
4052 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4054 /* Use an X item only if there's something to send */
4057 if (addr->cipher != NULL)
4060 sprintf(CS ptr, "X%.128s", addr->cipher);
4062 if (addr->peerdn == NULL) *ptr++ = 0; else
4064 sprintf(CS ptr, "%.512s", addr->peerdn);
4067 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4071 if (client_authenticator)
4074 sprintf(CS big_buffer, "C1%.64s", client_authenticator);
4076 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4078 if (client_authenticated_id)
4081 sprintf(CS big_buffer, "C2%.64s", client_authenticated_id);
4083 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4085 if (client_authenticated_sender)
4088 sprintf(CS big_buffer, "C3%.64s", client_authenticated_sender);
4090 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4093 #ifdef EXPERIMENTAL_PRDR
4094 if (addr->flags & af_prdr_used) rmt_dlv_checked_write(fd, "P", 1);
4097 /* Retry information: for most success cases this will be null. */
4099 for (r = addr->retries; r != NULL; r = r->next)
4102 sprintf(CS big_buffer, "R%c%.500s", r->flags, r->key);
4103 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4104 memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno));
4105 ptr += sizeof(r->basic_errno);
4106 memcpy(ptr, &(r->more_errno), sizeof(r->more_errno));
4107 ptr += sizeof(r->more_errno);
4108 if (r->message == NULL) *ptr++ = 0; else
4110 sprintf(CS ptr, "%.512s", r->message);
4113 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4116 /* The rest of the information goes in an 'A' item. */
4118 ptr = big_buffer + 3;
4119 sprintf(CS big_buffer, "A%c%c", addr->transport_return,
4120 addr->special_action);
4121 memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno));
4122 ptr += sizeof(addr->basic_errno);
4123 memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno));
4124 ptr += sizeof(addr->more_errno);
4125 memcpy(ptr, &(addr->flags), sizeof(addr->flags));
4126 ptr += sizeof(addr->flags);
4128 if (addr->message == NULL) *ptr++ = 0; else
4130 sprintf(CS ptr, "%.1024s", addr->message);
4134 if (addr->user_message == NULL) *ptr++ = 0; else
4136 sprintf(CS ptr, "%.1024s", addr->user_message);
4140 if (addr->host_used == NULL) *ptr++ = 0; else
4142 sprintf(CS ptr, "%.256s", addr->host_used->name);
4144 sprintf(CS ptr, "%.64s", addr->host_used->address);
4146 memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port));
4147 ptr += sizeof(addr->host_used->port);
4149 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4152 /* Add termination flag, close the pipe, and that's it. The character
4153 after 'Z' indicates whether continue_transport is now NULL or not.
4154 A change from non-NULL to NULL indicates a problem with a continuing
4157 big_buffer[0] = 'Z';
4158 big_buffer[1] = (continue_transport == NULL)? '0' : '1';
4159 rmt_dlv_checked_write(fd, big_buffer, 2);
4164 /* Back in the mainline: close the unwanted half of the pipe. */
4166 (void)close(pfd[pipe_write]);
4168 /* Fork failed; defer with error message */
4172 (void)close(pfd[pipe_read]);
4173 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4174 string_sprintf("fork failed for remote delivery to %s: %s",
4175 addr->domain, strerror(errno)), fallback);
4179 /* Fork succeeded; increment the count, and remember relevant data for
4180 when the process finishes. */
4183 parlist[poffset].addrlist = parlist[poffset].addr = addr;
4184 parlist[poffset].pid = pid;
4185 parlist[poffset].fd = pfd[pipe_read];
4186 parlist[poffset].done = FALSE;
4187 parlist[poffset].msg = NULL;
4188 parlist[poffset].return_path = return_path;
4190 /* If the process we've just started is sending a message down an existing
4191 channel, wait for it now. This ensures that only one such process runs at
4192 once, whatever the value of remote_max parallel. Otherwise, we might try to
4193 send two or more messages simultaneously down the same channel. This could
4194 happen if there are different domains that include the same host in otherwise
4195 different host lists.
4197 Also, if the transport closes down the channel, this information gets back
4198 (continue_transport gets set to NULL) before we consider any other addresses
4201 if (continue_transport != NULL) par_reduce(0, fallback);
4203 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4204 newly created process get going before we create another process. This should
4205 ensure repeatability in the tests. We only need to wait a tad. */
4207 else if (running_in_test_harness) millisleep(500);
4210 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4211 are still running and post-process their addresses. */
4213 par_reduce(0, fallback);
4220 /*************************************************
4221 * Split an address into local part and domain *
4222 *************************************************/
4224 /* This function initializes an address for routing by splitting it up into a
4225 local part and a domain. The local part is set up twice - once in its original
4226 casing, and once in lower case, and it is dequoted. We also do the "percent
4227 hack" for configured domains. This may lead to a DEFER result if a lookup
4228 defers. When a percent-hacking takes place, we insert a copy of the original
4229 address as a new parent of this address, as if we have had a redirection.
4232 addr points to an addr_item block containing the address
4235 DEFER - could not determine if domain is %-hackable
4239 deliver_split_address(address_item *addr)
4241 uschar *address = addr->address;
4242 uschar *domain = Ustrrchr(address, '@');
4244 int len = domain - address;
4246 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
4248 /* The implication in the RFCs (though I can't say I've seen it spelled out
4249 explicitly) is that quoting should be removed from local parts at the point
4250 where they are locally interpreted. [The new draft "821" is more explicit on
4251 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4252 removing quoting backslashes and any unquoted doublequotes. */
4254 t = addr->cc_local_part = store_get(len+1);
4257 register int c = *address++;
4258 if (c == '\"') continue;
4268 /* We do the percent hack only for those domains that are listed in
4269 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4271 if (percent_hack_domains != NULL)
4274 uschar *new_address = NULL;
4275 uschar *local_part = addr->cc_local_part;
4277 deliver_domain = addr->domain; /* set $domain */
4279 while ((rc = match_isinlist(deliver_domain, &percent_hack_domains, 0,
4280 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
4282 (t = Ustrrchr(local_part, '%')) != NULL)
4284 new_address = string_copy(local_part);
4285 new_address[t - local_part] = '@';
4286 deliver_domain = string_copylc(t+1);
4287 local_part = string_copyn(local_part, t - local_part);
4290 if (rc == DEFER) return DEFER; /* lookup deferred */
4292 /* If hackery happened, set up new parent and alter the current address. */
4294 if (new_address != NULL)
4296 address_item *new_parent = store_get(sizeof(address_item));
4297 *new_parent = *addr;
4298 addr->parent = new_parent;
4299 addr->address = new_address;
4300 addr->unique = string_copy(new_address);
4301 addr->domain = deliver_domain;
4302 addr->cc_local_part = local_part;
4303 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
4308 /* Create the lowercased version of the final local part, and make that the
4309 default one to be used. */
4311 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
4318 /*************************************************
4319 * Get next error message text *
4320 *************************************************/
4322 /* If f is not NULL, read the next "paragraph", from a customized error message
4323 text file, terminated by a line containing ****, and expand it.
4326 f NULL or a file to read from
4327 which string indicating which string (for errors)
4329 Returns: NULL or an expanded string
4333 next_emf(FILE *f, uschar *which)
4337 uschar *para, *yield;
4340 if (f == NULL) return NULL;
4342 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4343 Ustrcmp(buffer, "****\n") == 0) return NULL;
4345 para = store_get(size);
4348 para = string_cat(para, &size, &ptr, buffer, Ustrlen(buffer));
4349 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4350 Ustrcmp(buffer, "****\n") == 0) break;
4354 yield = expand_string(para);
4355 if (yield != NULL) return yield;
4357 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
4358 "bounce_message_file or warn_message_file (%s): %s", which,
4359 expand_string_message);
4366 /*************************************************
4367 * Close down a passed transport channel *
4368 *************************************************/
4370 /* This function is called when a passed transport channel cannot be used.
4371 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
4372 so that the function call can be the argument of a "return" statement.
4375 Returns: DELIVER_NOT_ATTEMPTED
4379 continue_closedown(void)
4381 if (continue_transport != NULL)
4383 transport_instance *t;
4384 for (t = transports; t != NULL; t = t->next)
4386 if (Ustrcmp(t->name, continue_transport) == 0)
4388 if (t->info->closedown != NULL) (t->info->closedown)(t);
4393 return DELIVER_NOT_ATTEMPTED;
4399 /*************************************************
4400 * Print address information *
4401 *************************************************/
4403 /* This function is called to output an address, or information about an
4404 address, for bounce or defer messages. If the hide_child flag is set, all we
4405 output is the original ancestor address.
4408 addr points to the address
4409 f the FILE to print to
4410 si an initial string
4411 sc a continuation string for before "generated"
4414 Returns: TRUE if the address is not hidden
4418 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
4422 uschar *printed = US"";
4423 address_item *ancestor = addr;
4424 while (ancestor->parent != NULL) ancestor = ancestor->parent;
4426 fprintf(f, "%s", CS si);
4428 if (addr->parent != NULL && testflag(addr, af_hide_child))
4430 printed = US"an undisclosed address";
4433 else if (!testflag(addr, af_pfr) || addr->parent == NULL)
4434 printed = addr->address;
4438 uschar *s = addr->address;
4441 if (addr->address[0] == '>') { ss = US"mail"; s++; }
4442 else if (addr->address[0] == '|') ss = US"pipe";
4445 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
4446 printed = addr->parent->address;
4449 fprintf(f, "%s", CS string_printing(printed));
4451 if (ancestor != addr)
4453 uschar *original = (ancestor->onetime_parent == NULL)?
4454 ancestor->address : ancestor->onetime_parent;
4455 if (strcmpic(original, printed) != 0)
4456 fprintf(f, "%s(%sgenerated from %s)", sc,
4457 (ancestor != addr->parent)? "ultimately " : "",
4458 string_printing(original));
4461 fprintf(f, "%s", CS se);
4469 /*************************************************
4470 * Print error for an address *
4471 *************************************************/
4473 /* This function is called to print the error information out of an address for
4474 a bounce or a warning message. It tries to format the message reasonably by
4475 introducing newlines. All lines are indented by 4; the initial printing
4476 position must be set before calling.
4478 This function used always to print the error. Nowadays we want to restrict it
4479 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
4480 and filter "fail". We no longer pass other information willy-nilly in bounce
4481 and warning messages. Text in user_message is always output; text in message
4482 only if the af_pass_message flag is set.
4486 f the FILE to print on
4493 print_address_error(address_item *addr, FILE *f, uschar *t)
4495 int count = Ustrlen(t);
4496 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
4500 if (addr->user_message != NULL) s = addr->user_message; else return;
4503 fprintf(f, "\n %s", t);
4507 if (*s == '\\' && s[1] == 'n')
4517 if (*s++ == ':' && isspace(*s) && count > 45)
4519 fprintf(f, "\n "); /* sic (because space follows) */
4531 /*************************************************
4532 * Check list of addresses for duplication *
4533 *************************************************/
4535 /* This function was introduced when the test for duplicate addresses that are
4536 not pipes, files, or autoreplies was moved from the middle of routing to when
4537 routing was complete. That was to fix obscure cases when the routing history
4538 affects the subsequent routing of identical addresses. This function is called
4539 after routing, to check that the final routed addresses are not duplicates.
4541 If we detect a duplicate, we remember what it is a duplicate of. Note that
4542 pipe, file, and autoreply de-duplication is handled during routing, so we must
4543 leave such "addresses" alone here, as otherwise they will incorrectly be
4546 Argument: address of list anchor
4551 do_duplicate_check(address_item **anchor)
4554 while ((addr = *anchor) != NULL)
4557 if (testflag(addr, af_pfr))
4559 anchor = &(addr->next);
4561 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
4563 DEBUG(D_deliver|D_route)
4564 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
4565 *anchor = addr->next;
4566 addr->dupof = tnode->data.ptr;
4567 addr->next = addr_duplicate;
4568 addr_duplicate = addr;
4572 tree_add_duplicate(addr->unique, addr);
4573 anchor = &(addr->next);
4581 /*************************************************
4582 * Deliver one message *
4583 *************************************************/
4585 /* This is the function which is called when a message is to be delivered. It
4586 is passed the id of the message. It is possible that the message no longer
4587 exists, if some other process has delivered it, and it is also possible that
4588 the message is being worked on by another process, in which case the data file
4591 If no delivery is attempted for any of the above reasons, the function returns
4592 DELIVER_NOT_ATTEMPTED.
4594 If the give_up flag is set true, do not attempt any deliveries, but instead
4595 fail all outstanding addresses and return the message to the sender (or
4598 A delivery operation has a process all to itself; we never deliver more than
4599 one message in the same process. Therefore we needn't worry too much about
4603 id the id of the message to be delivered
4604 forced TRUE if delivery was forced by an administrator; this overrides
4605 retry delays and causes a delivery to be tried regardless
4606 give_up TRUE if an administrator has requested that delivery attempts
4609 Returns: When the global variable mua_wrapper is FALSE:
4610 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
4611 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
4612 When the global variable mua_wrapper is TRUE:
4613 DELIVER_MUA_SUCCEEDED if delivery succeeded
4614 DELIVER_MUA_FAILED if delivery failed
4615 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
4619 deliver_message(uschar *id, BOOL forced, BOOL give_up)
4622 int final_yield = DELIVER_ATTEMPTED_NORMAL;
4623 time_t now = time(NULL);
4624 address_item *addr_last = NULL;
4625 uschar *filter_message = NULL;
4627 int process_recipients = RECIP_ACCEPT;
4630 extern int acl_where;
4632 uschar *info = (queue_run_pid == (pid_t)0)?
4633 string_sprintf("delivering %s", id) :
4634 string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
4636 /* If the D_process_info bit is on, set_process_info() will output debugging
4637 information. If not, we want to show this initial information if D_deliver or
4638 D_queue_run is set or in verbose mode. */
4640 set_process_info("%s", info);
4642 if ((debug_selector & D_process_info) == 0 &&
4643 (debug_selector & (D_deliver|D_queue_run|D_v)) != 0)
4644 debug_printf("%s\n", info);
4646 /* Ensure that we catch any subprocesses that are created. Although Exim
4647 sets SIG_DFL as its initial default, some routes through the code end up
4648 here with it set to SIG_IGN - cases where a non-synchronous delivery process
4649 has been forked, but no re-exec has been done. We use sigaction rather than
4650 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
4651 sure it is turned off. (There was a problem on AIX with this.) */
4655 struct sigaction act;
4656 act.sa_handler = SIG_DFL;
4657 sigemptyset(&(act.sa_mask));
4659 sigaction(SIGCHLD, &act, NULL);
4662 signal(SIGCHLD, SIG_DFL);
4665 /* Make the forcing flag available for routers and transports, set up the
4666 global message id field, and initialize the count for returned files and the
4667 message size. This use of strcpy() is OK because the length id is checked when
4668 it is obtained from a command line (the -M or -q options), and otherwise it is
4669 known to be a valid message id. */
4671 Ustrcpy(message_id, id);
4672 deliver_force = forced;
4676 /* Initialize some flags */
4678 update_spool = FALSE;
4679 remove_journal = TRUE;
4681 /* Set a known context for any ACLs we call via expansions */
4682 acl_where = ACL_WHERE_DELIVERY;
4684 /* Reset the random number generator, so that if several delivery processes are
4685 started from a queue runner that has already used random numbers (for sorting),
4686 they don't all get the same sequence. */
4690 /* Open and lock the message's data file. Exim locks on this one because the
4691 header file may get replaced as it is re-written during the delivery process.
4692 Any failures cause messages to be written to the log, except for missing files
4693 while queue running - another process probably completed delivery. As part of
4694 opening the data file, message_subdir gets set. */
4696 if (!spool_open_datafile(id))
4697 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4699 /* The value of message_size at this point has been set to the data length,
4700 plus one for the blank line that notionally precedes the data. */
4702 /* Now read the contents of the header file, which will set up the headers in
4703 store, and also the list of recipients and the tree of non-recipients and
4704 assorted flags. It updates message_size. If there is a reading or format error,
4705 give up; if the message has been around for sufficiently long, remove it. */
4707 sprintf(CS spoolname, "%s-H", id);
4708 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
4710 if (errno == ERRNO_SPOOLFORMAT)
4712 struct stat statbuf;
4713 sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
4715 if (Ustat(big_buffer, &statbuf) == 0)
4716 log_write(0, LOG_MAIN, "Format error in spool file %s: "
4717 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
4718 else log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
4721 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
4724 /* If we managed to read the envelope data, received_time contains the
4725 time the message was received. Otherwise, we can calculate it from the
4728 if (rc != spool_read_hdrerror)
4731 for (i = 0; i < 6; i++)
4732 received_time = received_time * BASE_62 + tab62[id[i] - '0'];
4735 /* If we've had this malformed message too long, sling it. */
4737 if (now - received_time > keep_malformed)
4739 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
4741 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
4743 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
4745 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
4747 log_write(0, LOG_MAIN, "Message removed because older than %s",
4748 readconf_printtime(keep_malformed));
4751 (void)close(deliver_datafile);
4752 deliver_datafile = -1;
4753 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4756 /* The spool header file has been read. Look to see if there is an existing
4757 journal file for this message. If there is, it means that a previous delivery
4758 attempt crashed (program or host) before it could update the spool header file.
4759 Read the list of delivered addresses from the journal and add them to the
4760 nonrecipients tree. Then update the spool file. We can leave the journal in
4761 existence, as it will get further successful deliveries added to it in this
4762 run, and it will be deleted if this function gets to its end successfully.
4763 Otherwise it might be needed again. */
4765 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
4766 jread = Ufopen(spoolname, "rb");
4769 while (Ufgets(big_buffer, big_buffer_size, jread) != NULL)
4771 int n = Ustrlen(big_buffer);
4772 big_buffer[n-1] = 0;
4773 tree_add_nonrecipient(big_buffer);
4774 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
4775 "journal file\n", big_buffer);
4777 (void)fclose(jread);
4778 /* Panic-dies on error */
4779 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
4781 else if (errno != ENOENT)
4783 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
4784 "%s", strerror(errno));
4785 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4788 /* A null recipients list indicates some kind of disaster. */
4790 if (recipients_list == NULL)
4792 (void)close(deliver_datafile);
4793 deliver_datafile = -1;
4794 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", spoolname);
4795 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4799 /* Handle a message that is frozen. There are a number of different things that
4800 can happen, but in the default situation, unless forced, no delivery is
4805 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
4806 /* Moving to another directory removes the message from Exim's view. Other
4807 tools must be used to deal with it. Logging of this action happens in
4808 spool_move_message() and its subfunctions. */
4810 if (move_frozen_messages &&
4811 spool_move_message(id, message_subdir, US"", US"F"))
4812 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4815 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
4816 maximum time to keep messages that are frozen. Thaw if we reach it, with a
4817 flag causing all recipients to be failed. The time is the age of the
4818 message, not the time since freezing. */
4820 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
4822 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
4823 process_recipients = RECIP_FAIL_TIMEOUT;
4826 /* For bounce messages (and others with no sender), thaw if the error message
4827 ignore timer is exceeded. The message will be discarded if this delivery
4830 else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
4832 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
4835 /* If this is a bounce message, or there's no auto thaw, or we haven't
4836 reached the auto thaw time yet, and this delivery is not forced by an admin
4837 user, do not attempt delivery of this message. Note that forced is set for
4838 continuing messages down the same channel, in order to skip load checking and
4839 ignore hold domains, but we don't want unfreezing in that case. */
4843 if ((sender_address[0] == 0 ||
4845 now <= deliver_frozen_at + auto_thaw
4848 (!forced || !deliver_force_thaw || !admin_user ||
4849 continue_hostname != NULL
4852 (void)close(deliver_datafile);
4853 deliver_datafile = -1;
4854 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
4855 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4858 /* If delivery was forced (by an admin user), assume a manual thaw.
4859 Otherwise it's an auto thaw. */
4863 deliver_manual_thaw = TRUE;
4864 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
4866 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
4869 /* We get here if any of the rules for unfreezing have triggered. */
4871 deliver_freeze = FALSE;
4872 update_spool = TRUE;
4876 /* Open the message log file if we are using them. This records details of
4877 deliveries, deferments, and failures for the benefit of the mail administrator.
4878 The log is not used by exim itself to track the progress of a message; that is
4879 done by rewriting the header spool file. */
4886 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
4887 fd = open_msglog_file(spoolname, SPOOL_MODE, &error);
4891 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
4892 spoolname, strerror(errno));
4893 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4896 /* Make a C stream out of it. */
4898 message_log = fdopen(fd, "a");
4899 if (message_log == NULL)
4901 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
4902 spoolname, strerror(errno));
4903 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4908 /* If asked to give up on a message, log who did it, and set the action for all
4913 struct passwd *pw = getpwuid(real_uid);
4914 log_write(0, LOG_MAIN, "cancelled by %s", (pw != NULL)?
4915 US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
4916 process_recipients = RECIP_FAIL;
4919 /* Otherwise, if there are too many Received: headers, fail all recipients. */
4921 else if (received_count > received_headers_max)
4922 process_recipients = RECIP_FAIL_LOOP;
4924 /* Otherwise, if a system-wide, address-independent message filter is
4925 specified, run it now, except in the case when we are failing all recipients as
4926 a result of timeout_frozen_after. If the system filter yields "delivered", then
4927 ignore the true recipients of the message. Failure of the filter file is
4928 logged, and the delivery attempt fails. */
4930 else if (system_filter != NULL && process_recipients != RECIP_FAIL_TIMEOUT)
4935 redirect_block redirect;
4937 if (system_filter_uid_set)
4939 ugid.uid = system_filter_uid;
4940 ugid.gid = system_filter_gid;
4941 ugid.uid_set = ugid.gid_set = TRUE;
4945 ugid.uid_set = ugid.gid_set = FALSE;
4948 return_path = sender_address;
4949 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
4950 system_filtering = TRUE;
4952 /* Any error in the filter file causes a delivery to be abandoned. */
4954 redirect.string = system_filter;
4955 redirect.isfile = TRUE;
4956 redirect.check_owner = redirect.check_group = FALSE;
4957 redirect.owners = NULL;
4958 redirect.owngroups = NULL;
4960 redirect.modemask = 0;
4962 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
4965 &redirect, /* Where the data is */
4966 RDO_DEFER | /* Turn on all the enabling options */
4967 RDO_FAIL | /* Leave off all the disabling options */
4972 NULL, /* No :include: restriction (not used in filter) */
4973 NULL, /* No sieve vacation directory (not sieve!) */
4974 NULL, /* No sieve enotify mailto owner (not sieve!) */
4975 NULL, /* No sieve user address (not sieve!) */
4976 NULL, /* No sieve subaddress (not sieve!) */
4977 &ugid, /* uid/gid data */
4978 &addr_new, /* Where to hang generated addresses */
4979 &filter_message, /* Where to put error message */
4980 NULL, /* Don't skip syntax errors */
4981 &filtertype, /* Will always be set to FILTER_EXIM for this call */
4982 US"system filter"); /* For error messages */
4984 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
4986 if (rc == FF_ERROR || rc == FF_NONEXIST)
4988 (void)close(deliver_datafile);
4989 deliver_datafile = -1;
4990 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
4991 string_printing(filter_message));
4992 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4995 /* Reset things. If the filter message is an empty string, which can happen
4996 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
4998 system_filtering = FALSE;
4999 enable_dollar_recipients = FALSE;
5000 if (filter_message != NULL && filter_message[0] == 0) filter_message = NULL;
5002 /* Save the values of the system filter variables so that user filters
5005 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5007 /* The filter can request that delivery of the original addresses be
5012 process_recipients = RECIP_DEFER;
5013 deliver_msglog("Delivery deferred by system filter\n");
5014 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5017 /* The filter can request that a message be frozen, but this does not
5018 take place if the message has been manually thawed. In that case, we must
5019 unset "delivered", which is forced by the "freeze" command to make -bF
5022 else if (rc == FF_FREEZE && !deliver_manual_thaw)
5024 deliver_freeze = TRUE;
5025 deliver_frozen_at = time(NULL);
5026 process_recipients = RECIP_DEFER;
5027 frozen_info = string_sprintf(" by the system filter%s%s",
5028 (filter_message == NULL)? US"" : US": ",
5029 (filter_message == NULL)? US"" : filter_message);
5032 /* The filter can request that a message be failed. The error message may be
5033 quite long - it is sent back to the sender in the bounce - but we don't want
5034 to fill up the log with repetitions of it. If it starts with << then the text
5035 between << and >> is written to the log, with the rest left for the bounce
5038 else if (rc == FF_FAIL)
5040 uschar *colon = US"";
5041 uschar *logmsg = US"";
5044 process_recipients = RECIP_FAIL_FILTER;
5046 if (filter_message != NULL)
5050 if (filter_message[0] == '<' && filter_message[1] == '<' &&
5051 (logend = Ustrstr(filter_message, ">>")) != NULL)
5053 logmsg = filter_message + 2;
5054 loglen = logend - logmsg;
5055 filter_message = logend + 2;
5056 if (filter_message[0] == 0) filter_message = NULL;
5060 logmsg = filter_message;
5061 loglen = Ustrlen(filter_message);
5065 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
5069 /* Delivery can be restricted only to those recipients (if any) that the
5070 filter specified. */
5072 else if (rc == FF_DELIVERED)
5074 process_recipients = RECIP_IGNORE;
5075 if (addr_new == NULL)
5076 log_write(0, LOG_MAIN, "=> discarded (system filter)");
5078 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
5081 /* If any new addresses were created by the filter, fake up a "parent"
5082 for them. This is necessary for pipes, etc., which are expected to have
5083 parents, and it also gives some sensible logging for others. Allow
5084 pipes, files, and autoreplies, and run them as the filter uid if set,
5085 otherwise as the current uid. */
5087 if (addr_new != NULL)
5089 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
5090 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
5092 /* The text "system-filter" is tested in transport_set_up_command() and in
5093 set_up_shell_command() in the pipe transport, to enable them to permit
5094 $recipients, so don't change it here without also changing it there. */
5096 address_item *p = addr_new;
5097 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
5099 parent->domain = string_copylc(qualify_domain_recipient);
5100 parent->local_part = US"system-filter";
5102 /* As part of this loop, we arrange for addr_last to end up pointing
5103 at the final address. This is used if we go on to add addresses for the
5104 original recipients. */
5108 if (parent->child_count == SHRT_MAX)
5109 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
5110 "than %d delivery addresses", SHRT_MAX);
5111 parent->child_count++;
5114 if (testflag(p, af_pfr))
5120 setflag(p, af_uid_set |
5126 /* Find the name of the system filter's appropriate pfr transport */
5128 if (p->address[0] == '|')
5131 tpname = system_filter_pipe_transport;
5132 address_pipe = p->address;
5134 else if (p->address[0] == '>')
5137 tpname = system_filter_reply_transport;
5141 if (p->address[Ustrlen(p->address)-1] == '/')
5143 type = US"directory";
5144 tpname = system_filter_directory_transport;
5149 tpname = system_filter_file_transport;
5151 address_file = p->address;
5154 /* Now find the actual transport, first expanding the name. We have
5155 set address_file or address_pipe above. */
5159 uschar *tmp = expand_string(tpname);
5160 address_file = address_pipe = NULL;
5162 p->message = string_sprintf("failed to expand \"%s\" as a "
5163 "system filter transport name", tpname);
5168 p->message = string_sprintf("system_filter_%s_transport is unset",
5174 transport_instance *tp;
5175 for (tp = transports; tp != NULL; tp = tp->next)
5177 if (Ustrcmp(tp->name, tpname) == 0)
5184 p->message = string_sprintf("failed to find \"%s\" transport "
5185 "for system filter delivery", tpname);
5188 /* If we couldn't set up a transport, defer the delivery, putting the
5189 error on the panic log as well as the main log. */
5191 if (p->transport == NULL)
5193 address_item *badp = p;
5195 if (addr_last == NULL) addr_new = p; else addr_last->next = p;
5196 badp->local_part = badp->address; /* Needed for log line */
5197 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
5200 } /* End of pfr handling */
5202 /* Either a non-pfr delivery, or we found a transport */
5204 DEBUG(D_deliver|D_filter)
5205 debug_printf("system filter added %s\n", p->address);
5209 } /* Loop through all addr_new addresses */
5214 /* Scan the recipients list, and for every one that is not in the non-
5215 recipients tree, add an addr item to the chain of new addresses. If the pno
5216 value is non-negative, we must set the onetime parent from it. This which
5217 points to the relevant entry in the recipients list.
5219 This processing can be altered by the setting of the process_recipients
5220 variable, which is changed if recipients are to be ignored, failed, or
5221 deferred. This can happen as a result of system filter activity, or if the -Mg
5222 option is used to fail all of them.
5224 Duplicate addresses are handled later by a different tree structure; we can't
5225 just extend the non-recipients tree, because that will be re-written to the
5226 spool if the message is deferred, and in any case there are casing
5227 complications for local addresses. */
5229 if (process_recipients != RECIP_IGNORE)
5231 for (i = 0; i < recipients_count; i++)
5233 if (tree_search(tree_nonrecipients, recipients_list[i].address) == NULL)
5235 recipient_item *r = recipients_list + i;
5236 address_item *new = deliver_make_addr(r->address, FALSE);
5237 new->p.errors_address = r->errors_to;
5240 new->onetime_parent = recipients_list[r->pno].address;
5242 switch (process_recipients)
5244 /* RECIP_DEFER is set when a system filter freezes a message. */
5247 new->next = addr_defer;
5252 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
5255 case RECIP_FAIL_FILTER:
5257 (filter_message == NULL)? US"delivery cancelled" : filter_message;
5258 setflag(new, af_pass_message);
5259 goto RECIP_QUEUE_FAILED; /* below */
5262 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
5263 than the value in timeout_frozen_after. Treat non-bounce messages
5264 similarly to -Mg; for bounce messages we just want to discard, so
5265 don't put the address on the failed list. The timeout has already
5268 case RECIP_FAIL_TIMEOUT:
5269 new->message = US"delivery cancelled; message timed out";
5270 goto RECIP_QUEUE_FAILED; /* below */
5273 /* RECIP_FAIL is set when -Mg has been used. */
5276 new->message = US"delivery cancelled by administrator";
5279 /* Common code for the failure cases above. If this is not a bounce
5280 message, put the address on the failed list so that it is used to
5281 create a bounce. Otherwise do nothing - this just discards the address.
5282 The incident has already been logged. */
5285 if (sender_address[0] != 0)
5287 new->next = addr_failed;
5293 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
5294 in the message. Process each address as a routing failure; if this
5295 is a bounce message, it will get frozen. */
5297 case RECIP_FAIL_LOOP:
5298 new->message = US"Too many \"Received\" headers - suspected mail loop";
5299 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5303 /* Value should be RECIP_ACCEPT; take this as the safe default. */
5306 if (addr_new == NULL) addr_new = new; else addr_last->next = new;
5316 address_item *p = addr_new;
5317 debug_printf("Delivery address list:\n");
5320 debug_printf(" %s %s\n", p->address, (p->onetime_parent == NULL)? US"" :
5326 /* Set up the buffers used for copying over the file when delivering. */
5328 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
5329 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
5333 /* Until there are no more new addresses, handle each one as follows:
5335 . If this is a generated address (indicated by the presence of a parent
5336 pointer) then check to see whether it is a pipe, file, or autoreply, and
5337 if so, handle it directly here. The router that produced the address will
5338 have set the allow flags into the address, and also set the uid/gid required.
5339 Having the routers generate new addresses and then checking them here at
5340 the outer level is tidier than making each router do the checking, and
5341 means that routers don't need access to the failed address queue.
5343 . Break up the address into local part and domain, and make lowercased
5344 versions of these strings. We also make unquoted versions of the local part.
5346 . Handle the percent hack for those domains for which it is valid.
5348 . For child addresses, determine if any of the parents have the same address.
5349 If so, generate a different string for previous delivery checking. Without
5350 this code, if the address spqr generates spqr via a forward or alias file,
5351 delivery of the generated spqr stops further attempts at the top level spqr,
5352 which is not what is wanted - it may have generated other addresses.
5354 . Check on the retry database to see if routing was previously deferred, but
5355 only if in a queue run. Addresses that are to be routed are put on the
5356 addr_route chain. Addresses that are to be deferred are put on the
5357 addr_defer chain. We do all the checking first, so as not to keep the
5358 retry database open any longer than necessary.
5360 . Now we run the addresses through the routers. A router may put the address
5361 on either the addr_local or the addr_remote chain for local or remote
5362 delivery, respectively, or put it on the addr_failed chain if it is
5363 undeliveable, or it may generate child addresses and put them on the
5364 addr_new chain, or it may defer an address. All the chain anchors are
5365 passed as arguments so that the routers can be called for verification
5368 . If new addresses have been generated by the routers, da capo.
5371 header_rewritten = FALSE; /* No headers rewritten yet */
5372 while (addr_new != NULL) /* Loop until all addresses dealt with */
5374 address_item *addr, *parent;
5375 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
5377 /* Failure to open the retry database is treated the same as if it does
5378 not exist. In both cases, dbm_file is NULL. */
5380 if (dbm_file == NULL)
5382 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
5383 debug_printf("no retry data available\n");
5386 /* Scan the current batch of new addresses, to handle pipes, files and
5387 autoreplies, and determine which others are ready for routing. */
5389 while (addr_new != NULL)
5394 dbdata_retry *domain_retry_record;
5395 dbdata_retry *address_retry_record;
5398 addr_new = addr->next;
5400 DEBUG(D_deliver|D_retry|D_route)
5402 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5403 debug_printf("Considering: %s\n", addr->address);
5406 /* Handle generated address that is a pipe or a file or an autoreply. */
5408 if (testflag(addr, af_pfr))
5410 /* If an autoreply in a filter could not generate a syntactically valid
5411 address, give up forthwith. Set af_ignore_error so that we don't try to
5412 generate a bounce. */
5414 if (testflag(addr, af_bad_reply))
5416 addr->basic_errno = ERRNO_BADADDRESS2;
5417 addr->local_part = addr->address;
5419 US"filter autoreply generated syntactically invalid recipient";
5420 setflag(addr, af_ignore_error);
5421 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5422 continue; /* with the next new address */
5425 /* If two different users specify delivery to the same pipe or file or
5426 autoreply, there should be two different deliveries, so build a unique
5427 string that incorporates the original address, and use this for
5428 duplicate testing and recording delivery, and also for retrying. */
5431 string_sprintf("%s:%s", addr->address, addr->parent->unique +
5432 (testflag(addr->parent, af_homonym)? 3:0));
5434 addr->address_retry_key = addr->domain_retry_key =
5435 string_sprintf("T:%s", addr->unique);
5437 /* If a filter file specifies two deliveries to the same pipe or file,
5438 we want to de-duplicate, but this is probably not wanted for two mail
5439 commands to the same address, where probably both should be delivered.
5440 So, we have to invent a different unique string in that case. Just
5441 keep piling '>' characters on the front. */
5443 if (addr->address[0] == '>')
5445 while (tree_search(tree_duplicates, addr->unique) != NULL)
5446 addr->unique = string_sprintf(">%s", addr->unique);
5449 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
5451 DEBUG(D_deliver|D_route)
5452 debug_printf("%s is a duplicate address: discarded\n", addr->address);
5453 addr->dupof = tnode->data.ptr;
5454 addr->next = addr_duplicate;
5455 addr_duplicate = addr;
5459 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5461 /* Check for previous delivery */
5463 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5465 DEBUG(D_deliver|D_route)
5466 debug_printf("%s was previously delivered: discarded\n", addr->address);
5467 child_done(addr, tod_stamp(tod_log));
5471 /* Save for checking future duplicates */
5473 tree_add_duplicate(addr->unique, addr);
5475 /* Set local part and domain */
5477 addr->local_part = addr->address;
5478 addr->domain = addr->parent->domain;
5480 /* Ensure that the delivery is permitted. */
5482 if (testflag(addr, af_file))
5484 if (!testflag(addr, af_allow_file))
5486 addr->basic_errno = ERRNO_FORBIDFILE;
5487 addr->message = US"delivery to file forbidden";
5488 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5489 continue; /* with the next new address */
5492 else if (addr->address[0] == '|')
5494 if (!testflag(addr, af_allow_pipe))
5496 addr->basic_errno = ERRNO_FORBIDPIPE;
5497 addr->message = US"delivery to pipe forbidden";
5498 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5499 continue; /* with the next new address */
5502 else if (!testflag(addr, af_allow_reply))
5504 addr->basic_errno = ERRNO_FORBIDREPLY;
5505 addr->message = US"autoreply forbidden";
5506 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5507 continue; /* with the next new address */
5510 /* If the errno field is already set to BADTRANSPORT, it indicates
5511 failure to expand a transport string, or find the associated transport,
5512 or an unset transport when one is required. Leave this test till now so
5513 that the forbid errors are given in preference. */
5515 if (addr->basic_errno == ERRNO_BADTRANSPORT)
5517 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5521 /* Treat /dev/null as a special case and abandon the delivery. This
5522 avoids having to specify a uid on the transport just for this case.
5523 Arrange for the transport name to be logged as "**bypassed**". */
5525 if (Ustrcmp(addr->address, "/dev/null") == 0)
5527 uschar *save = addr->transport->name;
5528 addr->transport->name = US"**bypassed**";
5529 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
5530 addr->transport->name = save;
5531 continue; /* with the next new address */
5534 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
5537 DEBUG(D_deliver|D_route)
5538 debug_printf("queued for %s transport\n", addr->transport->name);
5539 addr->next = addr_local;
5541 continue; /* with the next new address */
5544 /* Handle normal addresses. First, split up into local part and domain,
5545 handling the %-hack if necessary. There is the possibility of a defer from
5546 a lookup in percent_hack_domains. */
5548 if ((rc = deliver_split_address(addr)) == DEFER)
5550 addr->message = US"cannot check percent_hack_domains";
5551 addr->basic_errno = ERRNO_LISTDEFER;
5552 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
5556 /* Check to see if the domain is held. If so, proceed only if the
5557 delivery was forced by hand. */
5559 deliver_domain = addr->domain; /* set $domain */
5560 if (!forced && hold_domains != NULL &&
5561 (rc = match_isinlist(addr->domain, &hold_domains, 0,
5562 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
5567 addr->message = US"hold_domains lookup deferred";
5568 addr->basic_errno = ERRNO_LISTDEFER;
5572 addr->message = US"domain is held";
5573 addr->basic_errno = ERRNO_HELD;
5575 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
5579 /* Now we can check for duplicates and previously delivered addresses. In
5580 order to do this, we have to generate a "unique" value for each address,
5581 because there may be identical actual addresses in a line of descendents.
5582 The "unique" field is initialized to the same value as the "address" field,
5583 but gets changed here to cope with identically-named descendents. */
5585 for (parent = addr->parent; parent != NULL; parent = parent->parent)
5586 if (strcmpic(addr->address, parent->address) == 0) break;
5588 /* If there's an ancestor with the same name, set the homonym flag. This
5589 influences how deliveries are recorded. Then add a prefix on the front of
5590 the unique address. We use \n\ where n starts at 0 and increases each time.
5591 It is unlikely to pass 9, but if it does, it may look odd but will still
5592 work. This means that siblings or cousins with the same names are treated
5593 as duplicates, which is what we want. */
5597 setflag(addr, af_homonym);
5598 if (parent->unique[0] != '\\')
5599 addr->unique = string_sprintf("\\0\\%s", addr->address);
5601 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
5605 /* Ensure that the domain in the unique field is lower cased, because
5606 domains are always handled caselessly. */
5608 p = Ustrrchr(addr->unique, '@');
5609 while (*p != 0) { *p = tolower(*p); p++; }
5611 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5613 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5615 DEBUG(D_deliver|D_route)
5616 debug_printf("%s was previously delivered: discarded\n", addr->unique);
5617 child_done(addr, tod_stamp(tod_log));
5621 /* Get the routing retry status, saving the two retry keys (with and
5622 without the local part) for subsequent use. If there is no retry record for
5623 the standard address routing retry key, we look for the same key with the
5624 sender attached, because this form is used by the smtp transport after a
5625 4xx response to RCPT when address_retry_include_sender is true. */
5627 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
5628 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
5631 if (dbm_file == NULL)
5632 domain_retry_record = address_retry_record = NULL;
5635 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
5636 if (domain_retry_record != NULL &&
5637 now - domain_retry_record->time_stamp > retry_data_expire)
5638 domain_retry_record = NULL; /* Ignore if too old */
5640 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
5641 if (address_retry_record != NULL &&
5642 now - address_retry_record->time_stamp > retry_data_expire)
5643 address_retry_record = NULL; /* Ignore if too old */
5645 if (address_retry_record == NULL)
5647 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
5649 address_retry_record = dbfn_read(dbm_file, altkey);
5650 if (address_retry_record != NULL &&
5651 now - address_retry_record->time_stamp > retry_data_expire)
5652 address_retry_record = NULL; /* Ignore if too old */
5656 DEBUG(D_deliver|D_retry)
5658 if (domain_retry_record == NULL)
5659 debug_printf("no domain retry record\n");
5660 if (address_retry_record == NULL)
5661 debug_printf("no address retry record\n");
5664 /* If we are sending a message down an existing SMTP connection, we must
5665 assume that the message which created the connection managed to route
5666 an address to that connection. We do not want to run the risk of taking
5667 a long time over routing here, because if we do, the server at the other
5668 end of the connection may time it out. This is especially true for messages
5669 with lots of addresses. For this kind of delivery, queue_running is not
5670 set, so we would normally route all addresses. We take a pragmatic approach
5671 and defer routing any addresses that have any kind of domain retry record.
5672 That is, we don't even look at their retry times. It doesn't matter if this
5673 doesn't work occasionally. This is all just an optimization, after all.
5675 The reason for not doing the same for address retries is that they normally
5676 arise from 4xx responses, not DNS timeouts. */
5678 if (continue_hostname != NULL && domain_retry_record != NULL)
5680 addr->message = US"reusing SMTP connection skips previous routing defer";
5681 addr->basic_errno = ERRNO_RRETRY;
5682 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5685 /* If we are in a queue run, defer routing unless there is no retry data or
5686 we've passed the next retry time, or this message is forced. In other
5687 words, ignore retry data when not in a queue run.
5689 However, if the domain retry time has expired, always allow the routing
5690 attempt. If it fails again, the address will be failed. This ensures that
5691 each address is routed at least once, even after long-term routing
5694 If there is an address retry, check that too; just wait for the next
5695 retry time. This helps with the case when the temporary error on the
5696 address was really message-specific rather than address specific, since
5697 it allows other messages through.
5699 We also wait for the next retry time if this is a message sent down an
5700 existing SMTP connection (even though that will be forced). Otherwise there
5701 will be far too many attempts for an address that gets a 4xx error. In
5702 fact, after such an error, we should not get here because, the host should
5703 not be remembered as one this message needs. However, there was a bug that
5704 used to cause this to happen, so it is best to be on the safe side.
5706 Even if we haven't reached the retry time in the hints, there is one more
5707 check to do, which is for the ultimate address timeout. We only do this
5708 check if there is an address retry record and there is not a domain retry
5709 record; this implies that previous attempts to handle the address had the
5710 retry_use_local_parts option turned on. We use this as an approximation
5711 for the destination being like a local delivery, for example delivery over
5712 LMTP to an IMAP message store. In this situation users are liable to bump
5713 into their quota and thereby have intermittently successful deliveries,
5714 which keep the retry record fresh, which can lead to us perpetually
5715 deferring messages. */
5717 else if (((queue_running && !deliver_force) || continue_hostname != NULL)
5719 ((domain_retry_record != NULL &&
5720 now < domain_retry_record->next_try &&
5721 !domain_retry_record->expired)
5723 (address_retry_record != NULL &&
5724 now < address_retry_record->next_try))
5726 (domain_retry_record != NULL ||
5727 address_retry_record == NULL ||
5728 !retry_ultimate_address_timeout(addr->address_retry_key,
5729 addr->domain, address_retry_record, now)))
5731 addr->message = US"retry time not reached";
5732 addr->basic_errno = ERRNO_RRETRY;
5733 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5736 /* The domain is OK for routing. Remember if retry data exists so it
5737 can be cleaned up after a successful delivery. */
5741 if (domain_retry_record != NULL || address_retry_record != NULL)
5742 setflag(addr, af_dr_retry_exists);
5743 addr->next = addr_route;
5745 DEBUG(D_deliver|D_route)
5746 debug_printf("%s: queued for routing\n", addr->address);
5750 /* The database is closed while routing is actually happening. Requests to
5751 update it are put on a chain and all processed together at the end. */
5753 if (dbm_file != NULL) dbfn_close(dbm_file);
5755 /* If queue_domains is set, we don't even want to try routing addresses in
5756 those domains. During queue runs, queue_domains is forced to be unset.
5757 Optimize by skipping this pass through the addresses if nothing is set. */
5759 if (!deliver_force && queue_domains != NULL)
5761 address_item *okaddr = NULL;
5762 while (addr_route != NULL)
5764 address_item *addr = addr_route;
5765 addr_route = addr->next;
5767 deliver_domain = addr->domain; /* set $domain */
5768 if ((rc = match_isinlist(addr->domain, &queue_domains, 0,
5769 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
5774 addr->basic_errno = ERRNO_LISTDEFER;
5775 addr->message = US"queue_domains lookup deferred";
5776 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5780 addr->next = okaddr;
5786 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
5787 addr->message = US"domain is in queue_domains";
5788 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5792 addr_route = okaddr;
5795 /* Now route those addresses that are not deferred. */
5797 while (addr_route != NULL)
5800 address_item *addr = addr_route;
5801 uschar *old_domain = addr->domain;
5802 uschar *old_unique = addr->unique;
5803 addr_route = addr->next;
5806 /* Just in case some router parameter refers to it. */
5808 return_path = (addr->p.errors_address != NULL)?
5809 addr->p.errors_address : sender_address;
5811 /* If a router defers an address, add a retry item. Whether or not to
5812 use the local part in the key is a property of the router. */
5814 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
5815 &addr_succeed, v_none)) == DEFER)
5816 retry_add_item(addr, (addr->router->retry_use_local_part)?
5817 string_sprintf("R:%s@%s", addr->local_part, addr->domain) :
5818 string_sprintf("R:%s", addr->domain), 0);
5820 /* Otherwise, if there is an existing retry record in the database, add
5821 retry items to delete both forms. We must also allow for the possibility
5822 of a routing retry that includes the sender address. Since the domain might
5823 have been rewritten (expanded to fully qualified) as a result of routing,
5824 ensure that the rewritten form is also deleted. */
5826 else if (testflag(addr, af_dr_retry_exists))
5828 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
5830 retry_add_item(addr, altkey, rf_delete);
5831 retry_add_item(addr, addr->address_retry_key, rf_delete);
5832 retry_add_item(addr, addr->domain_retry_key, rf_delete);
5833 if (Ustrcmp(addr->domain, old_domain) != 0)
5834 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
5837 /* DISCARD is given for :blackhole: and "seen finish". The event has been
5838 logged, but we need to ensure the address (and maybe parents) is marked
5843 address_done(addr, tod_stamp(tod_log));
5844 continue; /* route next address */
5847 /* The address is finished with (failed or deferred). */
5851 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
5852 continue; /* route next address */
5855 /* The address has been routed. If the router changed the domain, it will
5856 also have changed the unique address. We have to test whether this address
5857 has already been delivered, because it's the unique address that finally
5860 if (addr->unique != old_unique &&
5861 tree_search(tree_nonrecipients, addr->unique) != 0)
5863 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
5864 "discarded\n", addr->address);
5865 if (addr_remote == addr) addr_remote = addr->next;
5866 else if (addr_local == addr) addr_local = addr->next;
5869 /* If the router has same_domain_copy_routing set, we are permitted to copy
5870 the routing for any other addresses with the same domain. This is an
5871 optimisation to save repeated DNS lookups for "standard" remote domain
5872 routing. The option is settable only on routers that generate host lists.
5873 We play it very safe, and do the optimization only if the address is routed
5874 to a remote transport, there are no header changes, and the domain was not
5875 modified by the router. */
5877 if (addr_remote == addr &&
5878 addr->router->same_domain_copy_routing &&
5879 addr->p.extra_headers == NULL &&
5880 addr->p.remove_headers == NULL &&
5881 old_domain == addr->domain)
5883 address_item **chain = &addr_route;
5884 while (*chain != NULL)
5886 address_item *addr2 = *chain;
5887 if (Ustrcmp(addr2->domain, addr->domain) != 0)
5889 chain = &(addr2->next);
5893 /* Found a suitable address; take it off the routing list and add it to
5894 the remote delivery list. */
5896 *chain = addr2->next;
5897 addr2->next = addr_remote;
5898 addr_remote = addr2;
5900 /* Copy the routing data */
5902 addr2->domain = addr->domain;
5903 addr2->router = addr->router;
5904 addr2->transport = addr->transport;
5905 addr2->host_list = addr->host_list;
5906 addr2->fallback_hosts = addr->fallback_hosts;
5907 addr2->p.errors_address = addr->p.errors_address;
5908 copyflag(addr2, addr, af_hide_child | af_local_host_removed);
5910 DEBUG(D_deliver|D_route)
5912 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
5914 "Routing for %s copied from %s\n",
5915 addr2->address, addr2->address, addr->address);
5919 } /* Continue with routing the next address. */
5920 } /* Loop to process any child addresses that the routers created, and
5921 any rerouted addresses that got put back on the new chain. */
5924 /* Debugging: show the results of the routing */
5926 DEBUG(D_deliver|D_retry|D_route)
5928 address_item *p = addr_local;
5929 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5930 debug_printf("After routing:\n Local deliveries:\n");
5933 debug_printf(" %s\n", p->address);
5938 debug_printf(" Remote deliveries:\n");
5941 debug_printf(" %s\n", p->address);
5946 debug_printf(" Failed addresses:\n");
5949 debug_printf(" %s\n", p->address);
5954 debug_printf(" Deferred addresses:\n");
5957 debug_printf(" %s\n", p->address);
5962 /* Free any resources that were cached during routing. */
5967 /* These two variables are set only during routing, after check_local_user.
5968 Ensure they are not set in transports. */
5970 local_user_gid = (gid_t)(-1);
5971 local_user_uid = (uid_t)(-1);
5973 /* Check for any duplicate addresses. This check is delayed until after
5974 routing, because the flexibility of the routing configuration means that
5975 identical addresses with different parentage may end up being redirected to
5976 different addresses. Checking for duplicates too early (as we previously used
5977 to) makes this kind of thing not work. */
5979 do_duplicate_check(&addr_local);
5980 do_duplicate_check(&addr_remote);
5982 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
5983 remote transport. The check that they all end up in one transaction happens in
5984 the do_remote_deliveries() function. */
5986 if (mua_wrapper && (addr_local != NULL || addr_failed != NULL ||
5987 addr_defer != NULL))
5990 uschar *which, *colon, *msg;
5992 if (addr_local != NULL)
5997 else if (addr_defer != NULL)
6000 which = US"deferred";
6008 while (addr->parent != NULL) addr = addr->parent;
6010 if (addr->message != NULL)
6013 msg = addr->message;
6015 else colon = msg = US"";
6017 /* We don't need to log here for a forced failure as it will already
6018 have been logged. Defer will also have been logged, but as a defer, so we do
6019 need to do the failure logging. */
6021 if (addr != addr_failed)
6022 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
6023 addr->address, which);
6025 /* Always write an error to the caller */
6027 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
6030 final_yield = DELIVER_MUA_FAILED;
6031 addr_failed = addr_defer = NULL; /* So that we remove the message */
6032 goto DELIVERY_TIDYUP;
6036 /* If this is a run to continue deliveries to an external channel that is
6037 already set up, defer any local deliveries. */
6039 if (continue_transport != NULL)
6041 if (addr_defer == NULL) addr_defer = addr_local; else
6043 address_item *addr = addr_defer;
6044 while (addr->next != NULL) addr = addr->next;
6045 addr->next = addr_local;
6051 /* Because address rewriting can happen in the routers, we should not really do
6052 ANY deliveries until all addresses have been routed, so that all recipients of
6053 the message get the same headers. However, this is in practice not always
6054 possible, since sometimes remote addresses give DNS timeouts for days on end.
6055 The pragmatic approach is to deliver what we can now, saving any rewritten
6056 headers so that at least the next lot of recipients benefit from the rewriting
6057 that has already been done.
6059 If any headers have been rewritten during routing, update the spool file to
6060 remember them for all subsequent deliveries. This can be delayed till later if
6061 there is only address to be delivered - if it succeeds the spool write need not
6064 if (header_rewritten &&
6065 ((addr_local != NULL &&
6066 (addr_local->next != NULL || addr_remote != NULL)) ||
6067 (addr_remote != NULL && addr_remote->next != NULL)))
6069 /* Panic-dies on error */
6070 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6071 header_rewritten = FALSE;
6075 /* If there are any deliveries to be done, open the journal file. This is used
6076 to record successful deliveries as soon as possible after each delivery is
6077 known to be complete. A file opened with O_APPEND is used so that several
6078 processes can run simultaneously.
6080 The journal is just insurance against crashes. When the spool file is
6081 ultimately updated at the end of processing, the journal is deleted. If a
6082 journal is found to exist at the start of delivery, the addresses listed
6083 therein are added to the non-recipients. */
6085 if (addr_local != NULL || addr_remote != NULL)
6087 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
6088 journal_fd = Uopen(spoolname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE);
6092 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
6093 spoolname, strerror(errno));
6094 return DELIVER_NOT_ATTEMPTED;
6097 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
6098 that the mode is correct - the group setting doesn't always seem to get
6099 set automatically. */
6101 if( fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
6102 || fchown(journal_fd, exim_uid, exim_gid)
6103 || fchmod(journal_fd, SPOOL_MODE)
6106 int ret = Uunlink(spoolname);
6107 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
6108 spoolname, strerror(errno));
6109 if(ret && errno != ENOENT)
6110 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6111 spoolname, strerror(errno));
6112 return DELIVER_NOT_ATTEMPTED;
6118 /* Now we can get down to the business of actually doing deliveries. Local
6119 deliveries are done first, then remote ones. If ever the problems of how to
6120 handle fallback transports are figured out, this section can be put into a loop
6121 for handling fallbacks, though the uid switching will have to be revised. */
6123 /* Precompile a regex that is used to recognize a parameter in response
6124 to an LHLO command, if is isn't already compiled. This may be used on both
6125 local and remote LMTP deliveries. */
6127 if (regex_IGNOREQUOTA == NULL) regex_IGNOREQUOTA =
6128 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
6130 /* Handle local deliveries */
6132 if (addr_local != NULL)
6134 DEBUG(D_deliver|D_transport)
6135 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
6136 do_local_deliveries();
6137 disable_logging = FALSE;
6140 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
6141 so just queue them all. */
6143 if (queue_run_local)
6145 while (addr_remote != NULL)
6147 address_item *addr = addr_remote;
6148 addr_remote = addr->next;
6150 addr->basic_errno = ERRNO_LOCAL_ONLY;
6151 addr->message = US"remote deliveries suppressed";
6152 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
6156 /* Handle remote deliveries */
6158 if (addr_remote != NULL)
6160 DEBUG(D_deliver|D_transport)
6161 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
6163 /* Precompile some regex that are used to recognize parameters in response
6164 to an EHLO command, if they aren't already compiled. */
6166 if (regex_PIPELINING == NULL) regex_PIPELINING =
6167 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
6169 if (regex_SIZE == NULL) regex_SIZE =
6170 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
6172 if (regex_AUTH == NULL) regex_AUTH =
6173 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
6177 if (regex_STARTTLS == NULL) regex_STARTTLS =
6178 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
6181 #ifdef EXPERIMENTAL_PRDR
6182 if (regex_PRDR == NULL) regex_PRDR =
6183 regex_must_compile(US"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE, TRUE);
6186 /* Now sort the addresses if required, and do the deliveries. The yield of
6187 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
6188 cannot be delivered in one transaction. */
6190 if (remote_sort_domains != NULL) sort_remote_deliveries();
6191 if (!do_remote_deliveries(FALSE))
6193 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
6194 "be delivered in one transaction");
6195 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
6197 final_yield = DELIVER_MUA_FAILED;
6198 addr_failed = addr_defer = NULL; /* So that we remove the message */
6199 goto DELIVERY_TIDYUP;
6202 /* See if any of the addresses that failed got put on the queue for delivery
6203 to their fallback hosts. We do it this way because often the same fallback
6204 host is used for many domains, so all can be sent in a single transaction
6205 (if appropriately configured). */
6207 if (addr_fallback != NULL && !mua_wrapper)
6209 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
6210 addr_remote = addr_fallback;
6211 addr_fallback = NULL;
6212 if (remote_sort_domains != NULL) sort_remote_deliveries();
6213 do_remote_deliveries(TRUE);
6215 disable_logging = FALSE;
6219 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6220 phase, to minimize cases of half-done things. */
6223 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6225 /* Root privilege is no longer needed */
6227 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
6229 set_process_info("tidying up after delivering %s", message_id);
6230 signal(SIGTERM, SIG_IGN);
6232 /* When we are acting as an MUA wrapper, the smtp transport will either have
6233 succeeded for all addresses, or failed them all in normal cases. However, there
6234 are some setup situations (e.g. when a named port does not exist) that cause an
6235 immediate exit with deferral of all addresses. Convert those into failures. We
6236 do not ever want to retry, nor do we want to send a bounce message. */
6240 if (addr_defer != NULL)
6242 address_item *addr, *nextaddr;
6243 for (addr = addr_defer; addr != NULL; addr = nextaddr)
6245 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
6246 "delivery", addr->address);
6247 nextaddr = addr->next;
6248 addr->next = addr_failed;
6254 /* Now all should either have succeeded or failed. */
6256 if (addr_failed == NULL) final_yield = DELIVER_MUA_SUCCEEDED; else
6258 uschar *s = (addr_failed->user_message != NULL)?
6259 addr_failed->user_message : addr_failed->message;
6261 fprintf(stderr, "Delivery failed: ");
6262 if (addr_failed->basic_errno > 0)
6264 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
6265 if (s != NULL) fprintf(stderr, ": ");
6269 if (addr_failed->basic_errno <= 0) fprintf(stderr, "unknown error");
6271 else fprintf(stderr, "%s", CS s);
6272 fprintf(stderr, "\n");
6274 final_yield = DELIVER_MUA_FAILED;
6279 /* In a normal configuration, we now update the retry database. This is done in
6280 one fell swoop at the end in order not to keep opening and closing (and
6281 locking) the database. The code for handling retries is hived off into a
6282 separate module for convenience. We pass it the addresses of the various
6283 chains, because deferred addresses can get moved onto the failed chain if the
6284 retry cutoff time has expired for all alternative destinations. Bypass the
6285 updating of the database if the -N flag is set, which is a debugging thing that
6286 prevents actual delivery. */
6288 else if (!dont_deliver) retry_update(&addr_defer, &addr_failed, &addr_succeed);
6290 /* If any addresses failed, we must send a message to somebody, unless
6291 af_ignore_error is set, in which case no action is taken. It is possible for
6292 several messages to get sent if there are addresses with different
6295 while (addr_failed != NULL)
6299 uschar *logtod = tod_stamp(tod_log);
6301 address_item *handled_addr = NULL;
6302 address_item **paddr;
6303 address_item *msgchain = NULL;
6304 address_item **pmsgchain = &msgchain;
6306 /* There are weird cases when logging is disabled in the transport. However,
6307 there may not be a transport (address failed by a router). */
6309 disable_logging = FALSE;
6310 if (addr_failed->transport != NULL)
6311 disable_logging = addr_failed->transport->disable_logging;
6314 debug_printf("processing failed address %s\n", addr_failed->address);
6316 /* There are only two ways an address in a bounce message can get here:
6318 (1) When delivery was initially deferred, but has now timed out (in the call
6319 to retry_update() above). We can detect this by testing for
6320 af_retry_timedout. If the address does not have its own errors address,
6321 we arrange to ignore the error.
6323 (2) If delivery failures for bounce messages are being ignored. We can detect
6324 this by testing for af_ignore_error. This will also be set if a bounce
6325 message has been autothawed and the ignore_bounce_errors_after time has
6326 passed. It might also be set if a router was explicitly configured to
6327 ignore errors (errors_to = "").
6329 If neither of these cases obtains, something has gone wrong. Log the
6330 incident, but then ignore the error. */
6332 if (sender_address[0] == 0 && addr_failed->p.errors_address == NULL)
6334 if (!testflag(addr_failed, af_retry_timedout) &&
6335 !testflag(addr_failed, af_ignore_error))
6337 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
6338 "failure is neither frozen nor ignored (it's been ignored)");
6340 setflag(addr_failed, af_ignore_error);
6343 /* If the first address on the list has af_ignore_error set, just remove
6344 it from the list, throw away any saved message file, log it, and
6345 mark the recipient done. */
6347 if (testflag(addr_failed, af_ignore_error))
6350 addr_failed = addr->next;
6351 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
6353 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
6355 (addr->parent == NULL)? US"" : US" <",
6356 (addr->parent == NULL)? US"" : addr->parent->address,
6357 (addr->parent == NULL)? US"" : US">");
6359 address_done(addr, logtod);
6360 child_done(addr, logtod);
6361 /* Panic-dies on error */
6362 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6365 /* Otherwise, handle the sending of a message. Find the error address for
6366 the first address, then send a message that includes all failed addresses
6367 that have the same error address. Note the bounce_recipient is a global so
6368 that it can be accesssed by $bounce_recipient while creating a customized
6373 bounce_recipient = (addr_failed->p.errors_address == NULL)?
6374 sender_address : addr_failed->p.errors_address;
6376 /* Make a subprocess to send a message */
6378 pid = child_open_exim(&fd);
6380 /* Creation of child failed */
6383 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6384 "create child process to send failure message: %s", getpid(),
6385 getppid(), strerror(errno));
6387 /* Creation of child succeeded */
6394 uschar *bcc, *emf_text;
6395 FILE *f = fdopen(fd, "wb");
6397 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
6398 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
6399 DELIVER_IN_BUFFER_SIZE;
6402 debug_printf("sending error message to: %s\n", bounce_recipient);
6404 /* Scan the addresses for all that have the same errors address, removing
6405 them from the addr_failed chain, and putting them on msgchain. */
6407 paddr = &addr_failed;
6408 for (addr = addr_failed; addr != NULL; addr = *paddr)
6410 if (Ustrcmp(bounce_recipient, (addr->p.errors_address == NULL)?
6411 sender_address : addr->p.errors_address) != 0)
6413 paddr = &(addr->next); /* Not the same; skip */
6415 else /* The same - dechain */
6417 *paddr = addr->next;
6420 pmsgchain = &(addr->next);
6424 /* Include X-Failed-Recipients: for automatic interpretation, but do
6425 not let any one header line get too long. We do this by starting a
6426 new header every 50 recipients. Omit any addresses for which the
6427 "hide_child" flag is set. */
6429 for (addr = msgchain; addr != NULL; addr = addr->next)
6431 if (testflag(addr, af_hide_child)) continue;
6438 (rcount++ == 0)? "X-Failed-Recipients: " : ",\n ",
6439 (testflag(addr, af_pfr) && addr->parent != NULL)?
6440 string_printing(addr->parent->address) :
6441 string_printing(addr->address));
6443 if (rcount > 0) fprintf(f, "\n");
6445 /* Output the standard headers */
6447 if (errors_reply_to != NULL)
6448 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6449 fprintf(f, "Auto-Submitted: auto-replied\n");
6451 fprintf(f, "To: %s\n", bounce_recipient);
6453 /* Open a template file if one is provided. Log failure to open, but
6454 carry on - default texts will be used. */
6456 if (bounce_message_file != NULL)
6458 emf = Ufopen(bounce_message_file, "rb");
6460 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
6461 "message texts: %s", bounce_message_file, strerror(errno));
6464 /* Quietly copy to configured additional addresses if required. */
6466 bcc = moan_check_errorcopy(bounce_recipient);
6467 if (bcc != NULL) fprintf(f, "Bcc: %s\n", bcc);
6469 /* The texts for the message can be read from a template file; if there
6470 isn't one, or if it is too short, built-in texts are used. The first
6471 emf text is a Subject: and any other headers. */
6473 emf_text = next_emf(emf, US"header");
6474 if (emf_text != NULL) fprintf(f, "%s\n", emf_text); else
6476 fprintf(f, "Subject: Mail delivery failed%s\n\n",
6477 to_sender? ": returning message to sender" : "");
6480 emf_text = next_emf(emf, US"intro");
6481 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6484 /* This message has been reworded several times. It seems to be confusing to
6485 somebody, however it is worded. I have retreated to the original, simple
6487 "This message was created automatically by mail delivery software.\n");
6488 if (bounce_message_text != NULL) fprintf(f, "%s", CS bounce_message_text);
6492 "\nA message that you sent could not be delivered to one or more of its\n"
6493 "recipients. This is a permanent error. The following address(es) failed:\n");
6498 "\nA message sent by\n\n <%s>\n\n"
6499 "could not be delivered to one or more of its recipients. The following\n"
6500 "address(es) failed:\n", sender_address);
6505 /* Process the addresses, leaving them on the msgchain if they have a
6506 file name for a return message. (There has already been a check in
6507 post_process_one() for the existence of data in the message file.) A TRUE
6508 return from print_address_information() means that the address is not
6512 for (addr = msgchain; addr != NULL; addr = *paddr)
6514 if (print_address_information(addr, f, US" ", US"\n ", US""))
6515 print_address_error(addr, f, US"");
6517 /* End the final line for the address */
6521 /* Leave on msgchain if there's a return file. */
6523 if (addr->return_file >= 0)
6525 paddr = &(addr->next);
6529 /* Else save so that we can tick off the recipient when the
6534 *paddr = addr->next;
6535 addr->next = handled_addr;
6536 handled_addr = addr;
6542 /* Get the next text, whether we need it or not, so as to be
6543 positioned for the one after. */
6545 emf_text = next_emf(emf, US"generated text");
6547 /* If there were any file messages passed by the local transports,
6548 include them in the message. Then put the address on the handled chain.
6549 In the case of a batch of addresses that were all sent to the same
6550 transport, the return_file field in all of them will contain the same
6551 fd, and the return_filename field in the *last* one will be set (to the
6552 name of the file). */
6554 if (msgchain != NULL)
6556 address_item *nextaddr;
6558 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6560 "The following text was generated during the delivery "
6561 "attempt%s:\n", (filecount > 1)? "s" : "");
6563 for (addr = msgchain; addr != NULL; addr = nextaddr)
6566 address_item *topaddr = addr;
6568 /* List all the addresses that relate to this file */
6571 while(addr != NULL) /* Insurance */
6573 print_address_information(addr, f, US"------ ", US"\n ",
6575 if (addr->return_filename != NULL) break;
6580 /* Now copy the file */
6582 fm = Ufopen(addr->return_filename, "rb");
6585 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
6589 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
6592 Uunlink(addr->return_filename);
6594 /* Can now add to handled chain, first fishing off the next
6595 address on the msgchain. */
6597 nextaddr = addr->next;
6598 addr->next = handled_addr;
6599 handled_addr = topaddr;
6604 /* Now copy the message, trying to give an intelligible comment if
6605 it is too long for it all to be copied. The limit isn't strictly
6606 applied because of the buffering. There is, however, an option
6607 to suppress copying altogether. */
6609 emf_text = next_emf(emf, US"copy");
6611 if (bounce_return_message)
6613 int topt = topt_add_return_path;
6614 if (!bounce_return_body) topt |= topt_no_body;
6616 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6618 if (bounce_return_body) fprintf(f,
6619 "------ This is a copy of the message, including all the headers. ------\n");
6621 "------ This is a copy of the message's headers. ------\n");
6624 /* While reading the "truncated" message, set return_size_limit to
6625 the actual max testing value, rounded. We need to read the message
6626 whether we are going to use it or not. */
6629 int temp = bounce_return_size_limit;
6630 bounce_return_size_limit = (max/1000)*1000;
6631 emf_text = next_emf(emf, US"truncated");
6632 bounce_return_size_limit = temp;
6635 if (bounce_return_body && bounce_return_size_limit > 0)
6637 struct stat statbuf;
6638 if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max)
6640 if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else
6643 "------ The body of the message is " OFF_T_FMT " characters long; only the first\n"
6644 "------ %d or so are included here.\n", statbuf.st_size, max);
6651 transport_filter_argv = NULL; /* Just in case */
6652 return_path = sender_address; /* In case not previously set */
6653 transport_write_message(NULL, fileno(f), topt,
6654 bounce_return_size_limit, NULL, NULL, NULL, NULL, NULL, 0);
6657 /* Write final text and close the template file if one is open */
6661 emf_text = next_emf(emf, US"final");
6662 if (emf_text != NULL) fprintf(f, "%s", CS emf_text);
6666 /* Close the file, which should send an EOF to the child process
6667 that is receiving the message. Wait for it to finish. */
6670 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
6672 /* In the test harness, let the child do it's thing first. */
6674 if (running_in_test_harness) millisleep(500);
6676 /* If the process failed, there was some disaster in setting up the
6677 error message. Unless the message is very old, ensure that addr_defer
6678 is non-null, which will have the effect of leaving the message on the
6679 spool. The failed addresses will get tried again next time. However, we
6680 don't really want this to happen too often, so freeze the message unless
6681 there are some genuine deferred addresses to try. To do this we have
6682 to call spool_write_header() here, because with no genuine deferred
6683 addresses the normal code below doesn't get run. */
6688 if (now - received_time < retry_maximum_timeout && addr_defer == NULL)
6690 addr_defer = (address_item *)(+1);
6691 deliver_freeze = TRUE;
6692 deliver_frozen_at = time(NULL);
6693 /* Panic-dies on error */
6694 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6697 deliver_msglog("Process failed (%d) when writing error message "
6698 "to %s%s", rc, bounce_recipient, s);
6699 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
6700 "to %s%s", rc, bounce_recipient, s);
6703 /* The message succeeded. Ensure that the recipients that failed are
6704 now marked finished with on the spool and their parents updated. */
6708 for (addr = handled_addr; addr != NULL; addr = addr->next)
6710 address_done(addr, logtod);
6711 child_done(addr, logtod);
6713 /* Panic-dies on error */
6714 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6720 disable_logging = FALSE; /* In case left set */
6722 /* Come here from the mua_wrapper case if routing goes wrong */
6726 /* If there are now no deferred addresses, we are done. Preserve the
6727 message log if so configured, and we are using them. Otherwise, sling it.
6728 Then delete the message itself. */
6730 if (addr_defer == NULL)
6734 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir,
6736 if (preserve_message_logs)
6739 sprintf(CS big_buffer, "%s/msglog.OLD/%s", spool_directory, id);
6740 if ((rc = Urename(spoolname, big_buffer)) < 0)
6742 (void)directory_make(spool_directory, US"msglog.OLD",
6743 MSGLOG_DIRECTORY_MODE, TRUE);
6744 rc = Urename(spoolname, big_buffer);
6747 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
6748 "msglog.OLD directory", spoolname);
6752 if (Uunlink(spoolname) < 0)
6753 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6754 spoolname, strerror(errno));
6758 /* Remove the two message files. */
6760 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
6761 if (Uunlink(spoolname) < 0)
6762 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6763 spoolname, strerror(errno));
6764 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
6765 if (Uunlink(spoolname) < 0)
6766 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6767 spoolname, strerror(errno));
6769 /* Log the end of this message, with queue time if requested. */
6771 if ((log_extra_selector & LX_queue_time_overall) != 0)
6772 log_write(0, LOG_MAIN, "Completed QT=%s",
6773 readconf_printtime(time(NULL) - received_time));
6775 log_write(0, LOG_MAIN, "Completed");
6777 /* Unset deliver_freeze so that we won't try to move the spool files further down */
6778 deliver_freeze = FALSE;
6781 /* If there are deferred addresses, we are keeping this message because it is
6782 not yet completed. Lose any temporary files that were catching output from
6783 pipes for any of the deferred addresses, handle one-time aliases, and see if
6784 the message has been on the queue for so long that it is time to send a warning
6785 message to the sender, unless it is a mailer-daemon. If all deferred addresses
6786 have the same domain, we can set deliver_domain for the expansion of
6787 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
6788 the parent's domain.
6790 If all the deferred addresses have an error number that indicates "retry time
6791 not reached", skip sending the warning message, because it won't contain the
6792 reason for the delay. It will get sent at the next real delivery attempt.
6793 However, if at least one address has tried, we'd better include all of them in
6796 If we can't make a process to send the message, don't worry.
6798 For mailing list expansions we want to send the warning message to the
6799 mailing list manager. We can't do a perfect job here, as some addresses may
6800 have different errors addresses, but if we take the errors address from
6801 each deferred address it will probably be right in most cases.
6803 If addr_defer == +1, it means there was a problem sending an error message
6804 for failed addresses, and there were no "real" deferred addresses. The value
6805 was set just to keep the message on the spool, so there is nothing to do here.
6808 else if (addr_defer != (address_item *)(+1))
6811 uschar *recipients = US"";
6812 BOOL delivery_attempted = FALSE;
6814 deliver_domain = testflag(addr_defer, af_pfr)?
6815 addr_defer->parent->domain : addr_defer->domain;
6817 for (addr = addr_defer; addr != NULL; addr = addr->next)
6819 address_item *otaddr;
6821 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
6823 if (deliver_domain != NULL)
6825 uschar *d = (testflag(addr, af_pfr))? addr->parent->domain : addr->domain;
6827 /* The domain may be unset for an address that has never been routed
6828 because the system filter froze the message. */
6830 if (d == NULL || Ustrcmp(d, deliver_domain) != 0) deliver_domain = NULL;
6833 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
6835 /* Handle the case of one-time aliases. If any address in the ancestry
6836 of this one is flagged, ensure it is in the recipients list, suitably
6837 flagged, and that its parent is marked delivered. */
6839 for (otaddr = addr; otaddr != NULL; otaddr = otaddr->parent)
6840 if (otaddr->onetime_parent != NULL) break;
6845 int t = recipients_count;
6847 for (i = 0; i < recipients_count; i++)
6849 uschar *r = recipients_list[i].address;
6850 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
6851 if (Ustrcmp(otaddr->address, r) == 0) break;
6854 /* Didn't find the address already in the list, and did find the
6855 ultimate parent's address in the list. After adding the recipient,
6856 update the errors address in the recipients list. */
6858 if (i >= recipients_count && t < recipients_count)
6860 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
6861 otaddr->address, otaddr->parent->address);
6862 receive_add_recipient(otaddr->address, t);
6863 recipients_list[recipients_count-1].errors_to = otaddr->p.errors_address;
6864 tree_add_nonrecipient(otaddr->parent->address);
6865 update_spool = TRUE;
6869 /* Except for error messages, ensure that either the errors address for
6870 this deferred address or, if there is none, the sender address, is on the
6871 list of recipients for a warning message. */
6873 if (sender_address[0] != 0)
6875 if (addr->p.errors_address == NULL)
6877 if (Ustrstr(recipients, sender_address) == NULL)
6878 recipients = string_sprintf("%s%s%s", recipients,
6879 (recipients[0] == 0)? "" : ",", sender_address);
6883 if (Ustrstr(recipients, addr->p.errors_address) == NULL)
6884 recipients = string_sprintf("%s%s%s", recipients,
6885 (recipients[0] == 0)? "" : ",", addr->p.errors_address);
6890 /* Send a warning message if the conditions are right. If the condition check
6891 fails because of a lookup defer, there is nothing we can do. The warning
6892 is not sent. Another attempt will be made at the next delivery attempt (if
6895 if (!queue_2stage && delivery_attempted &&
6896 delay_warning[1] > 0 && sender_address[0] != 0 &&
6897 (delay_warning_condition == NULL ||
6898 expand_check_condition(delay_warning_condition,
6899 US"delay_warning", US"option")))
6903 int queue_time = time(NULL) - received_time;
6905 /* When running in the test harness, there's an option that allows us to
6906 fudge this time so as to get repeatability of the tests. Take the first
6907 time off the list. In queue runs, the list pointer gets updated in the
6910 if (running_in_test_harness && fudged_queue_times[0] != 0)
6912 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
6915 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
6916 fudged_queue_times);
6921 /* See how many warnings we should have sent by now */
6923 for (count = 0; count < delay_warning[1]; count++)
6924 if (queue_time < delay_warning[count+2]) break;
6926 show_time = delay_warning[count+1];
6928 if (count >= delay_warning[1])
6931 int last_gap = show_time;
6932 if (count > 1) last_gap -= delay_warning[count];
6933 extra = (queue_time - delay_warning[count+1])/last_gap;
6934 show_time += last_gap * extra;
6940 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
6941 debug_printf("warning counts: required %d done %d\n", count,
6945 /* We have computed the number of warnings there should have been by now.
6946 If there haven't been enough, send one, and up the count to what it should
6949 if (warning_count < count)
6953 pid_t pid = child_open_exim(&fd);
6959 FILE *f = fdopen(fd, "wb");
6961 if (warn_message_file != NULL)
6963 wmf = Ufopen(warn_message_file, "rb");
6965 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
6966 "message texts: %s", warn_message_file, strerror(errno));
6969 warnmsg_recipients = recipients;
6970 warnmsg_delay = (queue_time < 120*60)?
6971 string_sprintf("%d minutes", show_time/60):
6972 string_sprintf("%d hours", show_time/3600);
6974 if (errors_reply_to != NULL)
6975 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6976 fprintf(f, "Auto-Submitted: auto-replied\n");
6978 fprintf(f, "To: %s\n", recipients);
6980 wmf_text = next_emf(wmf, US"header");
6981 if (wmf_text != NULL)
6982 fprintf(f, "%s\n", wmf_text);
6984 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
6985 message_id, warnmsg_delay);
6987 wmf_text = next_emf(wmf, US"intro");
6988 if (wmf_text != NULL) fprintf(f, "%s", CS wmf_text); else
6991 "This message was created automatically by mail delivery software.\n");
6993 if (Ustrcmp(recipients, sender_address) == 0)
6995 "A message that you sent has not yet been delivered to one or more of its\n"
6996 "recipients after more than ");
6999 "A message sent by\n\n <%s>\n\n"
7000 "has not yet been delivered to one or more of its recipients after more than \n",
7003 fprintf(f, "%s on the queue on %s.\n\n", warnmsg_delay,
7005 fprintf(f, "The message identifier is: %s\n", message_id);
7007 for (h = header_list; h != NULL; h = h->next)
7009 if (strncmpic(h->text, US"Subject:", 8) == 0)
7010 fprintf(f, "The subject of the message is: %s", h->text + 9);
7011 else if (strncmpic(h->text, US"Date:", 5) == 0)
7012 fprintf(f, "The date of the message is: %s", h->text + 6);
7016 fprintf(f, "The address%s to which the message has not yet been "
7018 (addr_defer->next == NULL)? "" : "es",
7019 (addr_defer->next == NULL)? "is": "are");
7022 /* List the addresses, with error information if allowed */
7025 while (addr_defer != NULL)
7027 address_item *addr = addr_defer;
7028 addr_defer = addr->next;
7029 if (print_address_information(addr, f, US" ", US"\n ", US""))
7030 print_address_error(addr, f, US"Delay reason: ");
7039 wmf_text = next_emf(wmf, US"final");
7040 if (wmf_text != NULL) fprintf(f, "%s", CS wmf_text);
7046 "No action is required on your part. Delivery attempts will continue for\n"
7047 "some time, and this warning may be repeated at intervals if the message\n"
7048 "remains undelivered. Eventually the mail delivery software will give up,\n"
7049 "and when that happens, the message will be returned to you.\n");
7052 /* Close and wait for child process to complete, without a timeout.
7053 If there's an error, don't update the count. */
7056 if (child_close(pid, 0) == 0)
7058 warning_count = count;
7059 update_spool = TRUE; /* Ensure spool rewritten */
7065 /* Clear deliver_domain */
7067 deliver_domain = NULL;
7069 /* If this was a first delivery attempt, unset the first time flag, and
7070 ensure that the spool gets updated. */
7072 if (deliver_firsttime)
7074 deliver_firsttime = FALSE;
7075 update_spool = TRUE;
7078 /* If delivery was frozen and freeze_tell is set, generate an appropriate
7079 message, unless the message is a local error message (to avoid loops). Then
7080 log the freezing. If the text in "frozen_info" came from a system filter,
7081 it has been escaped into printing characters so as not to mess up log lines.
7082 For the "tell" message, we turn \n back into newline. Also, insert a newline
7083 near the start instead of the ": " string. */
7087 if (freeze_tell != NULL && freeze_tell[0] != 0 && !local_error_message)
7089 uschar *s = string_copy(frozen_info);
7090 uschar *ss = Ustrstr(s, " by the system filter: ");
7101 if (*ss == '\\' && ss[1] == 'n')
7108 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
7109 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
7113 /* Log freezing just before we update the -H file, to minimize the chance
7114 of a race problem. */
7116 deliver_msglog("*** Frozen%s\n", frozen_info);
7117 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
7120 /* If there have been any updates to the non-recipients list, or other things
7121 that get written to the spool, we must now update the spool header file so
7122 that it has the right information for the next delivery attempt. If there
7123 was more than one address being delivered, the header_change update is done
7124 earlier, in case one succeeds and then something crashes. */
7127 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
7128 update_spool, header_rewritten);
7130 if (update_spool || header_rewritten)
7131 /* Panic-dies on error */
7132 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7135 /* Finished with the message log. If the message is complete, it will have
7136 been unlinked or renamed above. */
7138 if (message_logs) (void)fclose(message_log);
7140 /* Now we can close and remove the journal file. Its only purpose is to record
7141 successfully completed deliveries asap so that this information doesn't get
7142 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
7143 not serious, as trying it again is not harmful. The journal might not be open
7144 if all addresses were deferred at routing or directing. Nevertheless, we must
7145 remove it if it exists (may have been lying around from a crash during the
7146 previous delivery attempt). We don't remove the journal if a delivery
7147 subprocess failed to pass back delivery information; this is controlled by
7148 the remove_journal flag. When the journal is left, we also don't move the
7149 message off the main spool if frozen and the option is set. It should get moved
7150 at the next attempt, after the journal has been inspected. */
7152 if (journal_fd >= 0) (void)close(journal_fd);
7156 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
7157 if (Uunlink(spoolname) < 0 && errno != ENOENT)
7158 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", spoolname,
7161 /* Move the message off the spool if reqested */
7163 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
7164 if (deliver_freeze && move_frozen_messages)
7165 (void)spool_move_message(id, message_subdir, US"", US"F");
7169 /* Closing the data file frees the lock; if the file has been unlinked it
7170 will go away. Otherwise the message becomes available for another process
7173 (void)close(deliver_datafile);
7174 deliver_datafile = -1;
7175 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
7177 /* It is unlikely that there will be any cached resources, since they are
7178 released after routing, and in the delivery subprocesses. However, it's
7179 possible for an expansion for something afterwards (for example,
7180 expand_check_condition) to do a lookup. We must therefore be sure everything is
7184 acl_where = ACL_WHERE_UNKNOWN;
7190 /* End of deliver.c */