1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2014 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* The main code for delivering a message. */
14 /* Data block for keeping track of subprocesses for parallel remote
17 typedef struct pardata {
18 address_item *addrlist; /* chain of addresses */
19 address_item *addr; /* next address data expected for */
20 pid_t pid; /* subprocess pid */
21 int fd; /* pipe fd for getting result from subprocess */
22 int transport_count; /* returned transport count value */
23 BOOL done; /* no more data needed */
24 uschar *msg; /* error message */
25 uschar *return_path; /* return_path for these addresses */
28 /* Values for the process_recipients variable */
30 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
31 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
34 /* Mutually recursive functions for marking addresses done. */
36 static void child_done(address_item *, uschar *);
37 static void address_done(address_item *, uschar *);
39 /* Table for turning base-62 numbers into binary */
41 static uschar tab62[] =
42 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
43 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
44 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
45 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
46 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
47 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
51 /*************************************************
52 * Local static variables *
53 *************************************************/
55 /* addr_duplicate is global because it needs to be seen from the Envelope-To
58 static address_item *addr_defer = NULL;
59 static address_item *addr_failed = NULL;
60 static address_item *addr_fallback = NULL;
61 static address_item *addr_local = NULL;
62 static address_item *addr_new = NULL;
63 static address_item *addr_remote = NULL;
64 static address_item *addr_route = NULL;
65 static address_item *addr_succeed = NULL;
66 #ifdef EXPERIMENTAL_DSN
67 static address_item *addr_dsntmp = NULL;
68 static address_item *addr_senddsn = NULL;
71 static FILE *message_log = NULL;
72 static BOOL update_spool;
73 static BOOL remove_journal;
74 static int parcount = 0;
75 static pardata *parlist = NULL;
76 static int return_count;
77 static uschar *frozen_info = US"";
78 static uschar *used_return_path = NULL;
80 static uschar spoolname[PATH_MAX];
84 /*************************************************
85 * Make a new address item *
86 *************************************************/
88 /* This function gets the store and initializes with default values. The
89 transport_return value defaults to DEFER, so that any unexpected failure to
90 deliver does not wipe out the message. The default unique string is set to a
91 copy of the address, so that its domain can be lowercased.
94 address the RFC822 address string
95 copy force a copy of the address
97 Returns: a pointer to an initialized address_item
101 deliver_make_addr(uschar *address, BOOL copy)
103 address_item *addr = store_get(sizeof(address_item));
104 *addr = address_defaults;
105 if (copy) address = string_copy(address);
106 addr->address = address;
107 addr->unique = string_copy(address);
114 /*************************************************
115 * Set expansion values for an address *
116 *************************************************/
118 /* Certain expansion variables are valid only when handling an address or
119 address list. This function sets them up or clears the values, according to its
123 addr the address in question, or NULL to clear values
128 deliver_set_expansions(address_item *addr)
132 uschar ***p = address_expansions;
133 while (*p != NULL) **p++ = NULL;
137 /* Exactly what gets set depends on whether there is one or more addresses, and
138 what they contain. These first ones are always set, taking their values from
139 the first address. */
141 if (addr->host_list == NULL)
143 deliver_host = deliver_host_address = US"";
144 deliver_host_port = 0;
148 deliver_host = addr->host_list->name;
149 deliver_host_address = addr->host_list->address;
150 deliver_host_port = addr->host_list->port;
153 deliver_recipients = addr;
154 deliver_address_data = addr->p.address_data;
155 deliver_domain_data = addr->p.domain_data;
156 deliver_localpart_data = addr->p.localpart_data;
158 /* These may be unset for multiple addresses */
160 deliver_domain = addr->domain;
161 self_hostname = addr->self_hostname;
163 #ifdef EXPERIMENTAL_BRIGHTMAIL
164 bmi_deliver = 1; /* deliver by default */
165 bmi_alt_location = NULL;
166 bmi_base64_verdict = NULL;
167 bmi_base64_tracker_verdict = NULL;
170 /* If there's only one address we can set everything. */
172 if (addr->next == NULL)
174 address_item *addr_orig;
176 deliver_localpart = addr->local_part;
177 deliver_localpart_prefix = addr->prefix;
178 deliver_localpart_suffix = addr->suffix;
180 for (addr_orig = addr; addr_orig->parent != NULL;
181 addr_orig = addr_orig->parent);
182 deliver_domain_orig = addr_orig->domain;
184 /* Re-instate any prefix and suffix in the original local part. In all
185 normal cases, the address will have a router associated with it, and we can
186 choose the caseful or caseless version accordingly. However, when a system
187 filter sets up a pipe, file, or autoreply delivery, no router is involved.
188 In this case, though, there won't be any prefix or suffix to worry about. */
190 deliver_localpart_orig = (addr_orig->router == NULL)? addr_orig->local_part :
191 addr_orig->router->caseful_local_part?
192 addr_orig->cc_local_part : addr_orig->lc_local_part;
194 /* If there's a parent, make its domain and local part available, and if
195 delivering to a pipe or file, or sending an autoreply, get the local
196 part from the parent. For pipes and files, put the pipe or file string
197 into address_pipe and address_file. */
199 if (addr->parent != NULL)
201 deliver_domain_parent = addr->parent->domain;
202 deliver_localpart_parent = (addr->parent->router == NULL)?
203 addr->parent->local_part :
204 addr->parent->router->caseful_local_part?
205 addr->parent->cc_local_part : addr->parent->lc_local_part;
207 /* File deliveries have their own flag because they need to be picked out
208 as special more often. */
210 if (testflag(addr, af_pfr))
212 if (testflag(addr, af_file)) address_file = addr->local_part;
213 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
214 deliver_localpart = addr->parent->local_part;
215 deliver_localpart_prefix = addr->parent->prefix;
216 deliver_localpart_suffix = addr->parent->suffix;
220 #ifdef EXPERIMENTAL_BRIGHTMAIL
221 /* Set expansion variables related to Brightmail AntiSpam */
222 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
223 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
224 /* get message delivery status (0 - don't deliver | 1 - deliver) */
225 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
226 /* if message is to be delivered, get eventual alternate location */
227 if (bmi_deliver == 1) {
228 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
234 /* For multiple addresses, don't set local part, and leave the domain and
235 self_hostname set only if it is the same for all of them. It is possible to
236 have multiple pipe and file addresses, but only when all addresses have routed
237 to the same pipe or file. */
242 if (testflag(addr, af_pfr))
244 if (testflag(addr, af_file)) address_file = addr->local_part;
245 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
247 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
249 if (deliver_domain != NULL &&
250 Ustrcmp(deliver_domain, addr2->domain) != 0)
251 deliver_domain = NULL;
252 if (self_hostname != NULL && (addr2->self_hostname == NULL ||
253 Ustrcmp(self_hostname, addr2->self_hostname) != 0))
254 self_hostname = NULL;
255 if (deliver_domain == NULL && self_hostname == NULL) break;
263 /*************************************************
264 * Open a msglog file *
265 *************************************************/
267 /* This function is used both for normal message logs, and for files in the
268 msglog directory that are used to catch output from pipes. Try to create the
269 directory if it does not exist. From release 4.21, normal message logs should
270 be created when the message is received.
273 filename the file name
274 mode the mode required
275 error used for saying what failed
277 Returns: a file descriptor, or -1 (with errno set)
281 open_msglog_file(uschar *filename, int mode, uschar **error)
283 int fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
285 if (fd < 0 && errno == ENOENT)
288 sprintf(CS temp, "msglog/%s", message_subdir);
289 if (message_subdir[0] == 0) temp[6] = 0;
290 (void)directory_make(spool_directory, temp, MSGLOG_DIRECTORY_MODE, TRUE);
291 fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
294 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
295 function is called as root). Double check the mode, because the group setting
296 doesn't always get set automatically. */
300 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
301 if (fchown(fd, exim_uid, exim_gid) < 0)
306 if (fchmod(fd, mode) < 0)
312 else *error = US"create";
320 /*************************************************
321 * Write to msglog if required *
322 *************************************************/
324 /* Write to the message log, if configured. This function may also be called
328 format a string format
334 deliver_msglog(const char *format, ...)
337 if (!message_logs) return;
338 va_start(ap, format);
339 vfprintf(message_log, format, ap);
347 /*************************************************
348 * Replicate status for batch *
349 *************************************************/
351 /* When a transport handles a batch of addresses, it may treat them
352 individually, or it may just put the status in the first one, and return FALSE,
353 requesting that the status be copied to all the others externally. This is the
354 replication function. As well as the status, it copies the transport pointer,
355 which may have changed if appendfile passed the addresses on to a different
358 Argument: pointer to the first address in a chain
363 replicate_status(address_item *addr)
366 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
368 addr2->transport = addr->transport;
369 addr2->transport_return = addr->transport_return;
370 addr2->basic_errno = addr->basic_errno;
371 addr2->more_errno = addr->more_errno;
372 addr2->special_action = addr->special_action;
373 addr2->message = addr->message;
374 addr2->user_message = addr->user_message;
380 /*************************************************
381 * Compare lists of hosts *
382 *************************************************/
384 /* This function is given two pointers to chains of host items, and it yields
385 TRUE if the lists refer to the same hosts in the same order, except that
387 (1) Multiple hosts with the same non-negative MX values are permitted to appear
388 in different orders. Round-robinning nameservers can cause this to happen.
390 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
391 permitted to appear in different orders. This is caused by randomizing
394 This enables Exim to use a single SMTP transaction for sending to two entirely
395 different domains that happen to end up pointing at the same hosts.
398 one points to the first host list
399 two points to the second host list
401 Returns: TRUE if the lists refer to the same host set
405 same_hosts(host_item *one, host_item *two)
407 while (one != NULL && two != NULL)
409 if (Ustrcmp(one->name, two->name) != 0)
412 host_item *end_one = one;
413 host_item *end_two = two;
415 /* Batch up only if there was no MX and the list was not randomized */
417 if (mx == MX_NONE) return FALSE;
419 /* Find the ends of the shortest sequence of identical MX values */
421 while (end_one->next != NULL && end_one->next->mx == mx &&
422 end_two->next != NULL && end_two->next->mx == mx)
424 end_one = end_one->next;
425 end_two = end_two->next;
428 /* If there aren't any duplicates, there's no match. */
430 if (end_one == one) return FALSE;
432 /* For each host in the 'one' sequence, check that it appears in the 'two'
433 sequence, returning FALSE if not. */
438 for (hi = two; hi != end_two->next; hi = hi->next)
439 if (Ustrcmp(one->name, hi->name) == 0) break;
440 if (hi == end_two->next) return FALSE;
441 if (one == end_one) break;
445 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
446 Ensure both are pointing at the last host, and carry on as for equality. */
457 /* True if both are NULL */
464 /*************************************************
465 * Compare header lines *
466 *************************************************/
468 /* This function is given two pointers to chains of header items, and it yields
469 TRUE if they are the same header texts in the same order.
472 one points to the first header list
473 two points to the second header list
475 Returns: TRUE if the lists refer to the same header set
479 same_headers(header_line *one, header_line *two)
483 if (one == two) return TRUE; /* Includes the case where both NULL */
484 if (one == NULL || two == NULL) return FALSE;
485 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
493 /*************************************************
494 * Compare string settings *
495 *************************************************/
497 /* This function is given two pointers to strings, and it returns
498 TRUE if they are the same pointer, or if the two strings are the same.
501 one points to the first string
502 two points to the second string
504 Returns: TRUE or FALSE
508 same_strings(uschar *one, uschar *two)
510 if (one == two) return TRUE; /* Includes the case where both NULL */
511 if (one == NULL || two == NULL) return FALSE;
512 return (Ustrcmp(one, two) == 0);
517 /*************************************************
518 * Compare uid/gid for addresses *
519 *************************************************/
521 /* This function is given a transport and two addresses. It yields TRUE if the
522 uid/gid/initgroups settings for the two addresses are going to be the same when
527 addr1 the first address
528 addr2 the second address
530 Returns: TRUE or FALSE
534 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
536 if (!tp->uid_set && tp->expand_uid == NULL && !tp->deliver_as_creator)
538 if (testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set) ||
539 (testflag(addr1, af_uid_set) &&
540 (addr1->uid != addr2->uid ||
541 testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups))))
545 if (!tp->gid_set && tp->expand_gid == NULL)
547 if (testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set) ||
548 (testflag(addr1, af_gid_set) && addr1->gid != addr2->gid))
558 /*************************************************
559 * Record that an address is complete *
560 *************************************************/
562 /* This function records that an address is complete. This is straightforward
563 for most addresses, where the unique address is just the full address with the
564 domain lower cased. For homonyms (addresses that are the same as one of their
565 ancestors) their are complications. Their unique addresses have \x\ prepended
566 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
569 Exim used to record the unique addresses of homonyms as "complete". This,
570 however, fails when the pattern of redirection varies over time (e.g. if taking
571 unseen copies at only some times of day) because the prepended numbers may vary
572 from one delivery run to the next. This problem is solved by never recording
573 prepended unique addresses as complete. Instead, when a homonymic address has
574 actually been delivered via a transport, we record its basic unique address
575 followed by the name of the transport. This is checked in subsequent delivery
576 runs whenever an address is routed to a transport.
578 If the completed address is a top-level one (has no parent, which means it
579 cannot be homonymic) we also add the original address to the non-recipients
580 tree, so that it gets recorded in the spool file and therefore appears as
581 "done" in any spool listings. The original address may differ from the unique
582 address in the case of the domain.
584 Finally, this function scans the list of duplicates, marks as done any that
585 match this address, and calls child_done() for their ancestors.
588 addr address item that has been completed
589 now current time as a string
595 address_done(address_item *addr, uschar *now)
599 update_spool = TRUE; /* Ensure spool gets updated */
601 /* Top-level address */
603 if (addr->parent == NULL)
605 tree_add_nonrecipient(addr->unique);
606 tree_add_nonrecipient(addr->address);
609 /* Homonymous child address */
611 else if (testflag(addr, af_homonym))
613 if (addr->transport != NULL)
615 tree_add_nonrecipient(
616 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
620 /* Non-homonymous child address */
622 else tree_add_nonrecipient(addr->unique);
624 /* Check the list of duplicate addresses and ensure they are now marked
627 for (dup = addr_duplicate; dup != NULL; dup = dup->next)
629 if (Ustrcmp(addr->unique, dup->unique) == 0)
631 tree_add_nonrecipient(dup->unique);
632 child_done(dup, now);
640 /*************************************************
641 * Decrease counts in parents and mark done *
642 *************************************************/
644 /* This function is called when an address is complete. If there is a parent
645 address, its count of children is decremented. If there are still other
646 children outstanding, the function exits. Otherwise, if the count has become
647 zero, address_done() is called to mark the parent and its duplicates complete.
648 Then loop for any earlier ancestors.
651 addr points to the completed address item
652 now the current time as a string, for writing to the message log
658 child_done(address_item *addr, uschar *now)
661 while (addr->parent != NULL)
664 if ((addr->child_count -= 1) > 0) return; /* Incomplete parent */
665 address_done(addr, now);
667 /* Log the completion of all descendents only when there is no ancestor with
668 the same original address. */
670 for (aa = addr->parent; aa != NULL; aa = aa->parent)
671 if (Ustrcmp(aa->address, addr->address) == 0) break;
672 if (aa != NULL) continue;
674 deliver_msglog("%s %s: children all complete\n", now, addr->address);
675 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
683 d_hostlog(uschar * s, int * sizep, int * ptrp, address_item * addr)
685 s = string_append(s, sizep, ptrp, 5, US" H=", addr->host_used->name,
686 US" [", addr->host_used->address, US"]");
687 if ((log_extra_selector & LX_outgoing_port) != 0)
688 s = string_append(s, sizep, ptrp, 2, US":", string_sprintf("%d",
689 addr->host_used->port));
695 d_tlslog(uschar * s, int * sizep, int * ptrp, address_item * addr)
697 if ((log_extra_selector & LX_tls_cipher) != 0 && addr->cipher != NULL)
698 s = string_append(s, sizep, ptrp, 2, US" X=", addr->cipher);
699 if ((log_extra_selector & LX_tls_certificate_verified) != 0 &&
700 addr->cipher != NULL)
701 s = string_append(s, sizep, ptrp, 2, US" CV=",
702 testflag(addr, af_cert_verified)? "yes":"no");
703 if ((log_extra_selector & LX_tls_peerdn) != 0 && addr->peerdn != NULL)
704 s = string_append(s, sizep, ptrp, 3, US" DN=\"",
705 string_printing(addr->peerdn), US"\"");
711 #ifdef EXPERIMENTAL_TPDA
713 tpda_raise_event(uschar * action, uschar * event, uschar * ev_data)
719 debug_printf("TPDA(%s): tpda_event_action=|%s| tpda_delivery_IP=%s\n",
721 action, deliver_host_address);
726 if (!(s = expand_string(action)) && *expand_string_message)
727 log_write(0, LOG_MAIN|LOG_PANIC,
728 "failed to expand tpda_event_action %s in %s: %s\n",
729 event, transport_name, expand_string_message);
731 tpda_event = tpda_data = NULL;
733 /* If the expansion returns anything but an empty string, flag for
734 the caller to modify his normal processing
739 debug_printf("TPDA(%s): event_action returned \"%s\"\n", s);
747 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
748 this is a nonstandard call; no two-character delivery flag is written
749 but sender-host and sender are prefixed and "msg" is inserted in the log line.
752 flags passed to log_write()
755 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
758 int size = 256; /* Used for a temporary, */
759 int ptr = 0; /* expanding buffer, for */
760 uschar *s; /* building log lines; */
761 void *reset_point; /* released afterwards. */
764 /* Log the delivery on the main log. We use an extensible string to build up
765 the log line, and reset the store afterwards. Remote deliveries should always
766 have a pointer to the host item that succeeded; local deliveries can have a
767 pointer to a single host item in their host list, for use by the transport. */
769 #ifdef EXPERIMENTAL_TPDA
770 /* presume no successful remote delivery */
771 lookup_dnssec_authenticated = NULL;
774 s = reset_point = store_get(size);
776 log_address = string_log_address(addr, (log_write_selector & L_all_parents) != 0, TRUE);
778 s = string_append(s, &size, &ptr, 3, host_and_ident(TRUE), US" ", log_address);
782 s = string_append(s, &size, &ptr, 2, US"> ", log_address);
785 if ((log_extra_selector & LX_sender_on_delivery) != 0 || msg)
786 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
788 #ifdef EXPERIMENTAL_SRS
789 if(addr->p.srs_sender)
790 s = string_append(s, &size, &ptr, 3, US" SRS=<", addr->p.srs_sender, US">");
793 /* You might think that the return path must always be set for a successful
794 delivery; indeed, I did for some time, until this statement crashed. The case
795 when it is not set is for a delivery to /dev/null which is optimised by not
798 if (used_return_path != NULL &&
799 (log_extra_selector & LX_return_path_on_delivery) != 0)
800 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
803 s = string_append(s, &size, &ptr, 2, US" ", msg);
805 /* For a delivery from a system filter, there may not be a router */
806 if (addr->router != NULL)
807 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
809 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
811 if ((log_extra_selector & LX_delivery_size) != 0)
812 s = string_append(s, &size, &ptr, 2, US" S=",
813 string_sprintf("%d", transport_count));
817 if (addr->transport->info->local)
820 s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name);
821 if (addr->shadow_message != NULL)
822 s = string_cat(s, &size, &ptr, addr->shadow_message,
823 Ustrlen(addr->shadow_message));
826 /* Remote delivery */
832 s = d_hostlog(s, &size, &ptr, addr);
833 if (continue_sequence > 1)
834 s = string_cat(s, &size, &ptr, US"*", 1);
836 #ifdef EXPERIMENTAL_TPDA
837 deliver_host_address = addr->host_used->address;
838 deliver_host_port = addr->host_used->port;
840 /* DNS lookup status */
841 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
842 : addr->host_used->dnssec==DS_NO ? US"no"
848 s = d_tlslog(s, &size, &ptr, addr);
851 if (addr->authenticator)
853 s = string_append(s, &size, &ptr, 2, US" A=", addr->authenticator);
856 s = string_append(s, &size, &ptr, 2, US":", addr->auth_id);
857 if (log_extra_selector & LX_smtp_mailauth && addr->auth_sndr)
858 s = string_append(s, &size, &ptr, 2, US":", addr->auth_sndr);
863 if (addr->flags & af_prdr_used)
864 s = string_append(s, &size, &ptr, 1, US" PRDR");
868 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
870 if (log_extra_selector & LX_smtp_confirmation &&
872 (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0))
875 uschar *p = big_buffer;
876 uschar *ss = addr->message;
878 for (i = 0; i < 256 && ss[i] != 0; i++) /* limit logged amount */
880 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
885 s = string_append(s, &size, &ptr, 2, US" C=", big_buffer);
888 /* Time on queue and actual time taken to deliver */
890 if ((log_extra_selector & LX_queue_time) != 0)
891 s = string_append(s, &size, &ptr, 2, US" QT=",
892 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
894 if ((log_extra_selector & LX_deliver_time) != 0)
895 s = string_append(s, &size, &ptr, 2, US" DT=",
896 readconf_printtime(addr->more_errno));
898 /* string_cat() always leaves room for the terminator. Release the
899 store we used to build the line after writing it. */
902 log_write(0, flags, "%s", s);
904 #ifdef EXPERIMENTAL_TPDA
906 uschar * save_domain = deliver_domain;
907 uschar * save_local = deliver_localpart;
909 router_name = addr->router ? addr->router->name : NULL;
910 transport_name = addr->transport ? addr->transport->name : NULL;
911 deliver_domain = addr->domain;
912 deliver_localpart = addr->local_part;
914 (void) tpda_raise_event(addr->transport->tpda_event_action, US"msg:delivery",
915 addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
916 ? addr->message : NULL);
918 deliver_localpart = save_local;
919 deliver_domain = save_domain;
920 router_name = transport_name = NULL;
923 store_reset(reset_point);
929 /*************************************************
930 * Actions at the end of handling an address *
931 *************************************************/
933 /* This is a function for processing a single address when all that can be done
934 with it has been done.
937 addr points to the address block
938 result the result of the delivery attempt
939 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
940 driver_type indicates which type of driver (transport, or router) was last
941 to process the address
942 logchar '=' or '-' for use when logging deliveries with => or ->
948 post_process_one(address_item *addr, int result, int logflags, int driver_type,
951 uschar *now = tod_stamp(tod_log);
952 uschar *driver_kind = NULL;
953 uschar *driver_name = NULL;
956 int size = 256; /* Used for a temporary, */
957 int ptr = 0; /* expanding buffer, for */
958 uschar *s; /* building log lines; */
959 void *reset_point; /* released afterwards. */
962 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
964 /* Set up driver kind and name for logging. Disable logging if the router or
965 transport has disabled it. */
967 if (driver_type == DTYPE_TRANSPORT)
969 if (addr->transport != NULL)
971 driver_name = addr->transport->name;
972 driver_kind = US" transport";
973 disable_logging = addr->transport->disable_logging;
975 else driver_kind = US"transporting";
977 else if (driver_type == DTYPE_ROUTER)
979 if (addr->router != NULL)
981 driver_name = addr->router->name;
982 driver_kind = US" router";
983 disable_logging = addr->router->disable_logging;
985 else driver_kind = US"routing";
988 /* If there's an error message set, ensure that it contains only printing
989 characters - it should, but occasionally things slip in and this at least
990 stops the log format from getting wrecked. We also scan the message for an LDAP
991 expansion item that has a password setting, and flatten the password. This is a
992 fudge, but I don't know a cleaner way of doing this. (If the item is badly
993 malformed, it won't ever have gone near LDAP.) */
995 if (addr->message != NULL)
997 addr->message = string_printing(addr->message);
998 if (((Ustrstr(addr->message, "failed to expand") != NULL) || (Ustrstr(addr->message, "expansion of ") != NULL)) &&
999 (Ustrstr(addr->message, "mysql") != NULL ||
1000 Ustrstr(addr->message, "pgsql") != NULL ||
1001 #ifdef EXPERIMENTAL_REDIS
1002 Ustrstr(addr->message, "redis") != NULL ||
1004 Ustrstr(addr->message, "sqlite") != NULL ||
1005 Ustrstr(addr->message, "ldap:") != NULL ||
1006 Ustrstr(addr->message, "ldapdn:") != NULL ||
1007 Ustrstr(addr->message, "ldapm:") != NULL))
1009 addr->message = string_sprintf("Temporary internal error");
1013 /* If we used a transport that has one of the "return_output" options set, and
1014 if it did in fact generate some output, then for return_output we treat the
1015 message as failed if it was not already set that way, so that the output gets
1016 returned to the sender, provided there is a sender to send it to. For
1017 return_fail_output, do this only if the delivery failed. Otherwise we just
1018 unlink the file, and remove the name so that if the delivery failed, we don't
1019 try to send back an empty or unwanted file. The log_output options operate only
1020 on a non-empty file.
1022 In any case, we close the message file, because we cannot afford to leave a
1023 file-descriptor for one address while processing (maybe very many) others. */
1025 if (addr->return_file >= 0 && addr->return_filename != NULL)
1027 BOOL return_output = FALSE;
1028 struct stat statbuf;
1029 (void)EXIMfsync(addr->return_file);
1031 /* If there is no output, do nothing. */
1033 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1035 transport_instance *tb = addr->transport;
1037 /* Handle logging options */
1039 if (tb->log_output || (result == FAIL && tb->log_fail_output) ||
1040 (result == DEFER && tb->log_defer_output))
1043 FILE *f = Ufopen(addr->return_filename, "rb");
1045 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1046 "from %s transport: %s", addr->return_filename, tb->name,
1050 s = US Ufgets(big_buffer, big_buffer_size, f);
1053 uschar *p = big_buffer + Ustrlen(big_buffer);
1054 while (p > big_buffer && isspace(p[-1])) p--;
1056 s = string_printing(big_buffer);
1057 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1058 addr->address, tb->name, s);
1064 /* Handle returning options, but only if there is an address to return
1067 if (sender_address[0] != 0 || addr->p.errors_address != NULL)
1069 if (tb->return_output)
1071 addr->transport_return = result = FAIL;
1072 if (addr->basic_errno == 0 && addr->message == NULL)
1073 addr->message = US"return message generated";
1074 return_output = TRUE;
1077 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1081 /* Get rid of the file unless it might be returned, but close it in
1086 Uunlink(addr->return_filename);
1087 addr->return_filename = NULL;
1088 addr->return_file = -1;
1091 (void)close(addr->return_file);
1094 /* The success case happens only after delivery by a transport. */
1098 addr->next = addr_succeed;
1099 addr_succeed = addr;
1101 /* Call address_done() to ensure that we don't deliver to this address again,
1102 and write appropriate things to the message log. If it is a child address, we
1103 call child_done() to scan the ancestors and mark them complete if this is the
1104 last child to complete. */
1106 address_done(addr, now);
1107 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1109 if (addr->parent == NULL)
1110 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1111 driver_name, driver_kind);
1114 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1115 addr->parent->address, driver_name, driver_kind);
1116 child_done(addr, now);
1119 /* Certificates for logging (via TPDA) */
1121 tls_out.ourcert = addr->ourcert;
1122 addr->ourcert = NULL;
1123 tls_out.peercert = addr->peercert;
1124 addr->peercert = NULL;
1126 tls_out.cipher = addr->cipher;
1127 tls_out.peerdn = addr->peerdn;
1128 tls_out.ocsp = addr->ocsp;
1131 delivery_log(LOG_MAIN, addr, logchar, NULL);
1134 if (tls_out.ourcert)
1136 tls_free_cert(tls_out.ourcert);
1137 tls_out.ourcert = NULL;
1139 if (tls_out.peercert)
1141 tls_free_cert(tls_out.peercert);
1142 tls_out.peercert = NULL;
1144 tls_out.cipher = NULL;
1145 tls_out.peerdn = NULL;
1146 tls_out.ocsp = OCSP_NOT_REQ;
1151 /* Soft failure, or local delivery process failed; freezing may be
1154 else if (result == DEFER || result == PANIC)
1156 if (result == PANIC) logflags |= LOG_PANIC;
1158 /* This puts them on the chain in reverse order. Do not change this, because
1159 the code for handling retries assumes that the one with the retry
1160 information is last. */
1162 addr->next = addr_defer;
1165 /* The only currently implemented special action is to freeze the
1166 message. Logging of this is done later, just before the -H file is
1169 if (addr->special_action == SPECIAL_FREEZE)
1171 deliver_freeze = TRUE;
1172 deliver_frozen_at = time(NULL);
1173 update_spool = TRUE;
1176 /* If doing a 2-stage queue run, we skip writing to either the message
1177 log or the main log for SMTP defers. */
1179 if (!queue_2stage || addr->basic_errno != 0)
1183 /* For errors of the type "retry time not reached" (also remotes skipped
1184 on queue run), logging is controlled by L_retry_defer. Note that this kind
1185 of error number is negative, and all the retry ones are less than any
1188 unsigned int use_log_selector = (addr->basic_errno <= ERRNO_RETRY_BASE)?
1191 /* Build up the line that is used for both the message log and the main
1194 s = reset_point = store_get(size);
1196 /* Create the address string for logging. Must not do this earlier, because
1197 an OK result may be changed to FAIL when a pipe returns text. */
1199 log_address = string_log_address(addr,
1200 (log_write_selector & L_all_parents) != 0, result == OK);
1202 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1204 /* Either driver_name contains something and driver_kind contains
1205 " router" or " transport" (note the leading space), or driver_name is
1206 a null string and driver_kind contains "routing" without the leading
1207 space, if all routing has been deferred. When a domain has been held,
1208 so nothing has been done at all, both variables contain null strings. */
1210 if (driver_name == NULL)
1212 if (driver_kind != NULL)
1213 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1217 if (driver_kind[1] == 't' && addr->router != NULL)
1218 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1220 ss[1] = toupper(driver_kind[1]);
1221 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1224 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1225 s = string_cat(s, &size, &ptr, ss, Ustrlen(ss));
1227 if (addr->basic_errno > 0)
1228 s = string_append(s, &size, &ptr, 2, US": ",
1229 US strerror(addr->basic_errno));
1231 if (addr->message != NULL)
1232 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1236 /* Log the deferment in the message log, but don't clutter it
1237 up with retry-time defers after the first delivery attempt. */
1239 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1240 deliver_msglog("%s %s\n", now, s);
1242 /* Write the main log and reset the store */
1244 log_write(use_log_selector, logflags, "== %s", s);
1245 store_reset(reset_point);
1250 /* Hard failure. If there is an address to which an error message can be sent,
1251 put this address on the failed list. If not, put it on the deferred list and
1252 freeze the mail message for human attention. The latter action can also be
1253 explicitly requested by a router or transport. */
1257 /* If this is a delivery error, or a message for which no replies are
1258 wanted, and the message's age is greater than ignore_bounce_errors_after,
1259 force the af_ignore_error flag. This will cause the address to be discarded
1260 later (with a log entry). */
1262 if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
1263 setflag(addr, af_ignore_error);
1265 /* Freeze the message if requested, or if this is a bounce message (or other
1266 message with null sender) and this address does not have its own errors
1267 address. However, don't freeze if errors are being ignored. The actual code
1268 to ignore occurs later, instead of sending a message. Logging of freezing
1269 occurs later, just before writing the -H file. */
1271 if (!testflag(addr, af_ignore_error) &&
1272 (addr->special_action == SPECIAL_FREEZE ||
1273 (sender_address[0] == 0 && addr->p.errors_address == NULL)
1276 frozen_info = (addr->special_action == SPECIAL_FREEZE)? US"" :
1277 (sender_local && !local_error_message)?
1278 US" (message created with -f <>)" : US" (delivery error message)";
1279 deliver_freeze = TRUE;
1280 deliver_frozen_at = time(NULL);
1281 update_spool = TRUE;
1283 /* The address is put on the defer rather than the failed queue, because
1284 the message is being retained. */
1286 addr->next = addr_defer;
1290 /* Don't put the address on the nonrecipients tree yet; wait until an
1291 error message has been successfully sent. */
1295 addr->next = addr_failed;
1299 /* Build up the log line for the message and main logs */
1301 s = reset_point = store_get(size);
1303 /* Create the address string for logging. Must not do this earlier, because
1304 an OK result may be changed to FAIL when a pipe returns text. */
1306 log_address = string_log_address(addr,
1307 (log_write_selector & L_all_parents) != 0, result == OK);
1309 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1311 if ((log_extra_selector & LX_sender_on_delivery) != 0)
1312 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1314 /* Return path may not be set if no delivery actually happened */
1316 if (used_return_path != NULL &&
1317 (log_extra_selector & LX_return_path_on_delivery) != 0)
1318 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1320 if (addr->router != NULL)
1321 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1322 if (addr->transport != NULL)
1323 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1325 if (addr->host_used != NULL)
1326 s = d_hostlog(s, &size, &ptr, addr);
1329 s = d_tlslog(s, &size, &ptr, addr);
1332 if (addr->basic_errno > 0)
1333 s = string_append(s, &size, &ptr, 2, US": ",
1334 US strerror(addr->basic_errno));
1336 if (addr->message != NULL)
1337 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1341 /* Do the logging. For the message log, "routing failed" for those cases,
1342 just to make it clearer. */
1344 if (driver_name == NULL)
1345 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1347 deliver_msglog("%s %s\n", now, s);
1349 log_write(0, LOG_MAIN, "** %s", s);
1350 store_reset(reset_point);
1353 /* Ensure logging is turned on again in all cases */
1355 disable_logging = FALSE;
1361 /*************************************************
1362 * Address-independent error *
1363 *************************************************/
1365 /* This function is called when there's an error that is not dependent on a
1366 particular address, such as an expansion string failure. It puts the error into
1367 all the addresses in a batch, logs the incident on the main and panic logs, and
1368 clears the expansions. It is mostly called from local_deliver(), but can be
1369 called for a remote delivery via findugid().
1372 logit TRUE if (MAIN+PANIC) logging required
1373 addr the first of the chain of addresses
1375 format format string for error message, or NULL if already set in addr
1376 ... arguments for the format
1382 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1384 address_item *addr2;
1385 addr->basic_errno = code;
1391 va_start(ap, format);
1392 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1393 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1394 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1396 addr->message = string_copy(buffer);
1399 for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next)
1401 addr2->basic_errno = code;
1402 addr2->message = addr->message;
1405 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1406 deliver_set_expansions(NULL);
1412 /*************************************************
1413 * Check a "never users" list *
1414 *************************************************/
1416 /* This function is called to check whether a uid is on one of the two "never
1420 uid the uid to be checked
1421 nusers the list to be scanned; the first item in the list is the count
1423 Returns: TRUE if the uid is on the list
1427 check_never_users(uid_t uid, uid_t *nusers)
1430 if (nusers == NULL) return FALSE;
1431 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1437 /*************************************************
1438 * Find uid and gid for a transport *
1439 *************************************************/
1441 /* This function is called for both local and remote deliveries, to find the
1442 uid/gid under which to run the delivery. The values are taken preferentially
1443 from the transport (either explicit or deliver_as_creator), then from the
1444 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1445 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1446 panic error is logged, and the function fails (which normally leads to delivery
1450 addr the address (possibly a chain)
1452 uidp pointer to uid field
1453 gidp pointer to gid field
1454 igfp pointer to the use_initgroups field
1456 Returns: FALSE if failed - error has been set in address(es)
1460 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1463 uschar *nuname = NULL;
1464 BOOL gid_set = FALSE;
1466 /* Default initgroups flag comes from the transport */
1468 *igfp = tp->initgroups;
1470 /* First see if there's a gid on the transport, either fixed or expandable.
1471 The expanding function always logs failure itself. */
1478 else if (tp->expand_gid != NULL)
1480 if (route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1481 &(addr->message))) gid_set = TRUE;
1484 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1489 /* If the transport did not set a group, see if the router did. */
1491 if (!gid_set && testflag(addr, af_gid_set))
1497 /* Pick up a uid from the transport if one is set. */
1499 if (tp->uid_set) *uidp = tp->uid;
1501 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1502 it does not provide a passwd value from which a gid can be taken. */
1504 else if (tp->expand_uid != NULL)
1507 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1508 uidp, &(addr->message)))
1510 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1513 if (!gid_set && pw != NULL)
1520 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1522 else if (tp->deliver_as_creator)
1524 *uidp = originator_uid;
1527 *gidp = originator_gid;
1532 /* Otherwise see if the address specifies the uid and if so, take it and its
1535 else if (testflag(addr, af_uid_set))
1538 *igfp = testflag(addr, af_initgroups);
1541 /* Nothing has specified the uid - default to the Exim user, and group if the
1554 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1555 defaulting to the Exim uid. In other words, if the configuration has specified
1556 a uid, it must also provide a gid. */
1560 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1561 "%s transport", tp->name);
1565 /* Check that the uid is not on the lists of banned uids that may not be used
1566 for delivery processes. */
1568 if (check_never_users(*uidp, never_users))
1569 nuname = US"never_users";
1570 else if (check_never_users(*uidp, fixed_never_users))
1571 nuname = US"fixed_never_users";
1575 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1576 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1588 /*************************************************
1589 * Check the size of a message for a transport *
1590 *************************************************/
1592 /* Checks that the message isn't too big for the selected transport.
1593 This is called only when it is known that the limit is set.
1597 addr the (first) address being delivered
1600 DEFER expansion failed or did not yield an integer
1601 FAIL message too big
1605 check_message_size(transport_instance *tp, address_item *addr)
1610 deliver_set_expansions(addr);
1611 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1612 deliver_set_expansions(NULL);
1614 if (expand_string_message != NULL)
1617 if (size_limit == -1)
1618 addr->message = string_sprintf("failed to expand message_size_limit "
1619 "in %s transport: %s", tp->name, expand_string_message);
1621 addr->message = string_sprintf("invalid message_size_limit "
1622 "in %s transport: %s", tp->name, expand_string_message);
1624 else if (size_limit > 0 && message_size > size_limit)
1628 string_sprintf("message is too big (transport limit = %d)",
1637 /*************************************************
1638 * Transport-time check for a previous delivery *
1639 *************************************************/
1641 /* Check that this base address hasn't previously been delivered to its routed
1642 transport. If it has been delivered, mark it done. The check is necessary at
1643 delivery time in order to handle homonymic addresses correctly in cases where
1644 the pattern of redirection changes between delivery attempts (so the unique
1645 fields change). Non-homonymic previous delivery is detected earlier, at routing
1646 time (which saves unnecessary routing).
1649 addr the address item
1650 testing TRUE if testing wanted only, without side effects
1652 Returns: TRUE if previously delivered by the transport
1656 previously_transported(address_item *addr, BOOL testing)
1658 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
1659 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
1661 if (tree_search(tree_nonrecipients, big_buffer) != 0)
1663 DEBUG(D_deliver|D_route|D_transport)
1664 debug_printf("%s was previously delivered (%s transport): discarded\n",
1665 addr->address, addr->transport->name);
1666 if (!testing) child_done(addr, tod_stamp(tod_log));
1675 /******************************************************
1676 * Check for a given header in a header string *
1677 ******************************************************/
1679 /* This function is used when generating quota warnings. The configuration may
1680 specify any header lines it likes in quota_warn_message. If certain of them are
1681 missing, defaults are inserted, so we need to be able to test for the presence
1685 hdr the required header name
1686 hstring the header string
1688 Returns: TRUE the header is in the string
1689 FALSE the header is not in the string
1693 contains_header(uschar *hdr, uschar *hstring)
1695 int len = Ustrlen(hdr);
1696 uschar *p = hstring;
1699 if (strncmpic(p, hdr, len) == 0)
1702 while (*p == ' ' || *p == '\t') p++;
1703 if (*p == ':') return TRUE;
1705 while (*p != 0 && *p != '\n') p++;
1706 if (*p == '\n') p++;
1714 /*************************************************
1715 * Perform a local delivery *
1716 *************************************************/
1718 /* Each local delivery is performed in a separate process which sets its
1719 uid and gid as specified. This is a safer way than simply changing and
1720 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
1721 used safely. From release 4, Exim no longer makes any use of it. Besides, not
1722 all systems have seteuid().
1724 If the uid/gid are specified in the transport_instance, they are used; the
1725 transport initialization must ensure that either both or neither are set.
1726 Otherwise, the values associated with the address are used. If neither are set,
1727 it is a configuration error.
1729 The transport or the address may specify a home directory (transport over-
1730 rides), and if they do, this is set as $home. If neither have set a working
1731 directory, this value is used for that as well. Otherwise $home is left unset
1732 and the cwd is set to "/" - a directory that should be accessible to all users.
1734 Using a separate process makes it more complicated to get error information
1735 back. We use a pipe to pass the return code and also an error code and error
1736 text string back to the parent process.
1739 addr points to an address block for this delivery; for "normal" local
1740 deliveries this is the only address to be delivered, but for
1741 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
1742 a number of addresses can be handled simultaneously, and in this
1743 case addr will point to a chain of addresses with the same
1746 shadowing TRUE if running a shadow transport; this causes output from pipes
1753 deliver_local(address_item *addr, BOOL shadowing)
1755 BOOL use_initgroups;
1758 int status, len, rc;
1761 uschar *working_directory;
1762 address_item *addr2;
1763 transport_instance *tp = addr->transport;
1765 /* Set up the return path from the errors or sender address. If the transport
1766 has its own return path setting, expand it and replace the existing value. */
1768 if(addr->p.errors_address != NULL)
1769 return_path = addr->p.errors_address;
1770 #ifdef EXPERIMENTAL_SRS
1771 else if(addr->p.srs_sender != NULL)
1772 return_path = addr->p.srs_sender;
1775 return_path = sender_address;
1777 if (tp->return_path != NULL)
1779 uschar *new_return_path = expand_string(tp->return_path);
1780 if (new_return_path == NULL)
1782 if (!expand_string_forcedfail)
1784 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
1785 US"Failed to expand return path \"%s\" in %s transport: %s",
1786 tp->return_path, tp->name, expand_string_message);
1790 else return_path = new_return_path;
1793 /* For local deliveries, one at a time, the value used for logging can just be
1794 set directly, once and for all. */
1796 used_return_path = return_path;
1798 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
1799 gets put into the address(es), and the expansions are unset, so we can just
1802 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
1804 /* See if either the transport or the address specifies a home directory. A
1805 home directory set in the address may already be expanded; a flag is set to
1806 indicate that. In other cases we must expand it. */
1808 if ((deliver_home = tp->home_dir) != NULL || /* Set in transport, or */
1809 ((deliver_home = addr->home_dir) != NULL && /* Set in address and */
1810 !testflag(addr, af_home_expanded))) /* not expanded */
1812 uschar *rawhome = deliver_home;
1813 deliver_home = NULL; /* in case it contains $home */
1814 deliver_home = expand_string(rawhome);
1815 if (deliver_home == NULL)
1817 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
1818 "to expand for %s transport: %s", rawhome, tp->name,
1819 expand_string_message);
1822 if (*deliver_home != '/')
1824 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
1825 "is not absolute for %s transport", deliver_home, tp->name);
1830 /* See if either the transport or the address specifies a current directory,
1831 and if so, expand it. If nothing is set, use the home directory, unless it is
1832 also unset in which case use "/", which is assumed to be a directory to which
1833 all users have access. It is necessary to be in a visible directory for some
1834 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
1835 2.5) require this. */
1837 working_directory = (tp->current_dir != NULL)?
1838 tp->current_dir : addr->current_dir;
1840 if (working_directory != NULL)
1842 uschar *raw = working_directory;
1843 working_directory = expand_string(raw);
1844 if (working_directory == NULL)
1846 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
1847 "failed to expand for %s transport: %s", raw, tp->name,
1848 expand_string_message);
1851 if (*working_directory != '/')
1853 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
1854 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
1858 else working_directory = (deliver_home == NULL)? US"/" : deliver_home;
1860 /* If one of the return_output flags is set on the transport, create and open a
1861 file in the message log directory for the transport to write its output onto.
1862 This is mainly used by pipe transports. The file needs to be unique to the
1863 address. This feature is not available for shadow transports. */
1865 if (!shadowing && (tp->return_output || tp->return_fail_output ||
1866 tp->log_output || tp->log_fail_output))
1869 addr->return_filename =
1870 string_sprintf("%s/msglog/%s/%s-%d-%d", spool_directory, message_subdir,
1871 message_id, getpid(), return_count++);
1872 addr->return_file = open_msglog_file(addr->return_filename, 0400, &error);
1873 if (addr->return_file < 0)
1875 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
1876 "to return message: %s", error, tp->name, strerror(errno));
1881 /* Create the pipe for inter-process communication. */
1885 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
1890 /* Now fork the process to do the real work in the subprocess, but first
1891 ensure that all cached resources are freed so that the subprocess starts with
1892 a clean slate and doesn't interfere with the parent process. */
1896 if ((pid = fork()) == 0)
1898 BOOL replicate = TRUE;
1900 /* Prevent core dumps, as we don't want them in users' home directories.
1901 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
1902 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
1903 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
1904 complain if the error is "not supported".
1906 There are two scenarios where changing the max limit has an effect. In one,
1907 the user is using a .forward and invoking a command of their choice via pipe;
1908 for these, we do need the max limit to be 0 unless the admin chooses to
1909 permit an increased limit. In the other, the command is invoked directly by
1910 the transport and is under administrator control, thus being able to raise
1911 the limit aids in debugging. So there's no general always-right answer.
1913 Thus we inhibit core-dumps completely but let individual transports, while
1914 still root, re-raise the limits back up to aid debugging. We make the
1915 default be no core-dumps -- few enough people can use core dumps in
1916 diagnosis that it's reasonable to make them something that has to be explicitly requested.
1923 if (setrlimit(RLIMIT_CORE, &rl) < 0)
1925 # ifdef SETRLIMIT_NOT_SUPPORTED
1926 if (errno != ENOSYS && errno != ENOTSUP)
1928 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
1933 /* Reset the random number generator, so different processes don't all
1934 have the same sequence. */
1938 /* If the transport has a setup entry, call this first, while still
1939 privileged. (Appendfile uses this to expand quota, for example, while
1940 able to read private files.) */
1942 if (addr->transport->setup != NULL)
1944 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
1948 addr->transport_return = DEFER;
1952 addr->transport_return = PANIC;
1957 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
1958 when the process becomes unprivileged, it won't be able to write to the
1959 process log. SIGHUP is ignored throughout exim, except when it is being
1962 signal(SIGINT, SIG_IGN);
1963 signal(SIGTERM, SIG_IGN);
1964 signal(SIGUSR1, SIG_IGN);
1966 /* Close the unwanted half of the pipe, and set close-on-exec for the other
1967 half - for transports that exec things (e.g. pipe). Then set the required
1970 (void)close(pfd[pipe_read]);
1971 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
1973 exim_setugid(uid, gid, use_initgroups,
1974 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
1975 addr->address, addr->transport->name));
1979 address_item *batched;
1980 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
1981 for (batched = addr->next; batched != NULL; batched = batched->next)
1982 debug_printf("additional batched address: %s\n", batched->address);
1985 /* Set an appropriate working directory. */
1987 if (Uchdir(working_directory) < 0)
1989 addr->transport_return = DEFER;
1990 addr->basic_errno = errno;
1991 addr->message = string_sprintf("failed to chdir to %s", working_directory);
1994 /* If successful, call the transport */
1999 set_process_info("delivering %s to %s using %s", message_id,
2000 addr->local_part, addr->transport->name);
2002 /* Setting this global in the subprocess means we need never clear it */
2003 transport_name = addr->transport->name;
2005 /* If a transport filter has been specified, set up its argument list.
2006 Any errors will get put into the address, and FALSE yielded. */
2008 if (addr->transport->filter_command != NULL)
2010 ok = transport_set_up_command(&transport_filter_argv,
2011 addr->transport->filter_command,
2012 TRUE, PANIC, addr, US"transport filter", NULL);
2013 transport_filter_timeout = addr->transport->filter_timeout;
2015 else transport_filter_argv = NULL;
2019 debug_print_string(addr->transport->debug_string);
2020 replicate = !(addr->transport->info->code)(addr->transport, addr);
2024 /* Pass the results back down the pipe. If necessary, first replicate the
2025 status in the top address to the others in the batch. The label is the
2026 subject of a goto when a call to the transport's setup function fails. We
2027 pass the pointer to the transport back in case it got changed as a result of
2028 file_format in appendfile. */
2032 if (replicate) replicate_status(addr);
2033 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2036 int local_part_length = Ustrlen(addr2->local_part);
2040 if( (ret = write(pfd[pipe_write], (void *)&(addr2->transport_return), sizeof(int))) != sizeof(int)
2041 || (ret = write(pfd[pipe_write], (void *)&transport_count, sizeof(transport_count))) != sizeof(transport_count)
2042 || (ret = write(pfd[pipe_write], (void *)&(addr2->flags), sizeof(addr2->flags))) != sizeof(addr2->flags)
2043 || (ret = write(pfd[pipe_write], (void *)&(addr2->basic_errno), sizeof(int))) != sizeof(int)
2044 || (ret = write(pfd[pipe_write], (void *)&(addr2->more_errno), sizeof(int))) != sizeof(int)
2045 || (ret = write(pfd[pipe_write], (void *)&(addr2->special_action), sizeof(int))) != sizeof(int)
2046 || (ret = write(pfd[pipe_write], (void *)&(addr2->transport),
2047 sizeof(transport_instance *))) != sizeof(transport_instance *)
2049 /* For a file delivery, pass back the local part, in case the original
2050 was only part of the final delivery path. This gives more complete
2053 || (testflag(addr2, af_file)
2054 && ( (ret = write(pfd[pipe_write], (void *)&local_part_length, sizeof(int))) != sizeof(int)
2055 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2059 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2060 ret == -1 ? strerror(errno) : "short write");
2062 /* Now any messages */
2064 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2066 int message_length = (s == NULL)? 0 : Ustrlen(s) + 1;
2067 if( (ret = write(pfd[pipe_write], (void *)&message_length, sizeof(int))) != sizeof(int)
2068 || (message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length)
2070 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2071 ret == -1 ? strerror(errno) : "short write");
2075 /* OK, this process is now done. Free any cached resources that it opened,
2076 and close the pipe we were writing down before exiting. */
2078 (void)close(pfd[pipe_write]);
2083 /* Back in the main process: panic if the fork did not succeed. This seems
2084 better than returning an error - if forking is failing it is probably best
2085 not to try other deliveries for this message. */
2088 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2091 /* Read the pipe to get the delivery status codes and error messages. Our copy
2092 of the writing end must be closed first, as otherwise read() won't return zero
2093 on an empty pipe. We check that a status exists for each address before
2094 overwriting the address structure. If data is missing, the default DEFER status
2095 will remain. Afterwards, close the reading end. */
2097 (void)close(pfd[pipe_write]);
2099 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2101 len = read(pfd[pipe_read], (void *)&status, sizeof(int));
2107 addr2->transport_return = status;
2108 len = read(pfd[pipe_read], (void *)&transport_count,
2109 sizeof(transport_count));
2110 len = read(pfd[pipe_read], (void *)&(addr2->flags), sizeof(addr2->flags));
2111 len = read(pfd[pipe_read], (void *)&(addr2->basic_errno), sizeof(int));
2112 len = read(pfd[pipe_read], (void *)&(addr2->more_errno), sizeof(int));
2113 len = read(pfd[pipe_read], (void *)&(addr2->special_action), sizeof(int));
2114 len = read(pfd[pipe_read], (void *)&(addr2->transport),
2115 sizeof(transport_instance *));
2117 if (testflag(addr2, af_file))
2119 int local_part_length;
2120 len = read(pfd[pipe_read], (void *)&local_part_length, sizeof(int));
2121 len = read(pfd[pipe_read], (void *)big_buffer, local_part_length);
2122 big_buffer[local_part_length] = 0;
2123 addr2->local_part = string_copy(big_buffer);
2126 for (i = 0, sptr = &(addr2->message); i < 2;
2127 i++, sptr = &(addr2->user_message))
2130 len = read(pfd[pipe_read], (void *)&message_length, sizeof(int));
2131 if (message_length > 0)
2133 len = read(pfd[pipe_read], (void *)big_buffer, message_length);
2134 if (len > 0) *sptr = string_copy(big_buffer);
2141 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2142 "from delivery subprocess", addr2->unique);
2147 (void)close(pfd[pipe_read]);
2149 /* Unless shadowing, write all successful addresses immediately to the journal
2150 file, to ensure they are recorded asap. For homonymic addresses, use the base
2151 address plus the transport name. Failure to write the journal is panic-worthy,
2152 but don't stop, as it may prove possible subsequently to update the spool file
2153 in order to record the delivery. */
2157 for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2159 if (addr2->transport_return != OK) continue;
2161 if (testflag(addr2, af_homonym))
2162 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2164 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2166 /* In the test harness, wait just a bit to let the subprocess finish off
2167 any debug output etc first. */
2169 if (running_in_test_harness) millisleep(300);
2171 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2172 len = Ustrlen(big_buffer);
2173 if (write(journal_fd, big_buffer, len) != len)
2174 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2175 big_buffer, strerror(errno));
2178 /* Ensure the journal file is pushed out to disk. */
2180 if (EXIMfsync(journal_fd) < 0)
2181 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2185 /* Wait for the process to finish. If it terminates with a non-zero code,
2186 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2187 status values of all the addresses as they are. Take care to handle the case
2188 when the subprocess doesn't seem to exist. This has been seen on one system
2189 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2190 happens, wait() doesn't recognize the termination of child processes. Exim now
2191 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2193 while ((rc = wait(&status)) != pid)
2195 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2197 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2198 addr->transport->driver_name);
2204 if ((status & 0xffff) != 0)
2206 int msb = (status >> 8) & 255;
2207 int lsb = status & 255;
2208 int code = (msb == 0)? (lsb & 0x7f) : msb;
2209 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2210 addr->special_action = SPECIAL_FREEZE;
2211 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2212 "status 0x%04x: %s %d",
2213 addr->transport->driver_name,
2215 (msb == 0)? "terminated by signal" : "exit code",
2219 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2221 if (addr->special_action == SPECIAL_WARN &&
2222 addr->transport->warn_message != NULL)
2225 uschar *warn_message;
2227 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2229 warn_message = expand_string(addr->transport->warn_message);
2230 if (warn_message == NULL)
2231 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2232 "message for %s transport): %s", addr->transport->warn_message,
2233 addr->transport->name, expand_string_message);
2236 pid_t pid = child_open_exim(&fd);
2239 FILE *f = fdopen(fd, "wb");
2240 if (errors_reply_to != NULL &&
2241 !contains_header(US"Reply-To", warn_message))
2242 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2243 fprintf(f, "Auto-Submitted: auto-replied\n");
2244 if (!contains_header(US"From", warn_message)) moan_write_from(f);
2245 fprintf(f, "%s", CS warn_message);
2247 /* Close and wait for child process to complete, without a timeout. */
2250 (void)child_close(pid, 0);
2254 addr->special_action = SPECIAL_NONE;
2260 /*************************************************
2261 * Do local deliveries *
2262 *************************************************/
2264 /* This function processes the list of addresses in addr_local. True local
2265 deliveries are always done one address at a time. However, local deliveries can
2266 be batched up in some cases. Typically this is when writing batched SMTP output
2267 files for use by some external transport mechanism, or when running local
2268 deliveries over LMTP.
2275 do_local_deliveries(void)
2278 open_db *dbm_file = NULL;
2279 time_t now = time(NULL);
2281 /* Loop until we have exhausted the supply of local deliveries */
2283 while (addr_local != NULL)
2285 time_t delivery_start;
2287 address_item *addr2, *addr3, *nextaddr;
2288 int logflags = LOG_MAIN;
2289 int logchar = dont_deliver? '*' : '=';
2290 transport_instance *tp;
2292 /* Pick the first undelivered address off the chain */
2294 address_item *addr = addr_local;
2295 addr_local = addr->next;
2298 DEBUG(D_deliver|D_transport)
2299 debug_printf("--------> %s <--------\n", addr->address);
2301 /* An internal disaster if there is no transport. Should not occur! */
2303 if ((tp = addr->transport) == NULL)
2305 logflags |= LOG_PANIC;
2306 disable_logging = FALSE; /* Jic */
2308 (addr->router != NULL)?
2309 string_sprintf("No transport set by %s router", addr->router->name)
2311 string_sprintf("No transport set by system filter");
2312 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2316 /* Check that this base address hasn't previously been delivered to this
2317 transport. The check is necessary at this point to handle homonymic addresses
2318 correctly in cases where the pattern of redirection changes between delivery
2319 attempts. Non-homonymic previous delivery is detected earlier, at routing
2322 if (previously_transported(addr, FALSE)) continue;
2324 /* There are weird cases where logging is disabled */
2326 disable_logging = tp->disable_logging;
2328 /* Check for batched addresses and possible amalgamation. Skip all the work
2329 if either batch_max <= 1 or there aren't any other addresses for local
2332 if (tp->batch_max > 1 && addr_local != NULL)
2334 int batch_count = 1;
2335 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2336 BOOL uses_lp = (testflag(addr, af_pfr) &&
2337 (testflag(addr, af_file) || addr->local_part[0] == '|')) ||
2338 readconf_depends((driver_instance *)tp, US"local_part");
2339 uschar *batch_id = NULL;
2340 address_item **anchor = &addr_local;
2341 address_item *last = addr;
2344 /* Expand the batch_id string for comparison with other addresses.
2345 Expansion failure suppresses batching. */
2347 if (tp->batch_id != NULL)
2349 deliver_set_expansions(addr);
2350 batch_id = expand_string(tp->batch_id);
2351 deliver_set_expansions(NULL);
2352 if (batch_id == NULL)
2354 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2355 "in %s transport (%s): %s", tp->name, addr->address,
2356 expand_string_message);
2357 batch_count = tp->batch_max;
2361 /* Until we reach the batch_max limit, pick off addresses which have the
2362 same characteristics. These are:
2365 not previously delivered (see comment about 50 lines above)
2366 same local part if the transport's configuration contains $local_part
2367 or if this is a file or pipe delivery from a redirection
2368 same domain if the transport's configuration contains $domain
2370 same additional headers
2371 same headers to be removed
2372 same uid/gid for running the transport
2373 same first host if a host list is set
2376 while ((next = *anchor) != NULL && batch_count < tp->batch_max)
2379 tp == next->transport &&
2380 !previously_transported(next, TRUE) &&
2381 (addr->flags & (af_pfr|af_file)) == (next->flags & (af_pfr|af_file)) &&
2382 (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0) &&
2383 (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0) &&
2384 same_strings(next->p.errors_address, addr->p.errors_address) &&
2385 same_headers(next->p.extra_headers, addr->p.extra_headers) &&
2386 same_strings(next->p.remove_headers, addr->p.remove_headers) &&
2387 same_ugid(tp, addr, next) &&
2388 ((addr->host_list == NULL && next->host_list == NULL) ||
2389 (addr->host_list != NULL && next->host_list != NULL &&
2390 Ustrcmp(addr->host_list->name, next->host_list->name) == 0));
2392 /* If the transport has a batch_id setting, batch_id will be non-NULL
2393 from the expansion outside the loop. Expand for this address and compare.
2394 Expansion failure makes this address ineligible for batching. */
2396 if (ok && batch_id != NULL)
2399 address_item *save_nextnext = next->next;
2400 next->next = NULL; /* Expansion for a single address */
2401 deliver_set_expansions(next);
2402 next->next = save_nextnext;
2403 bid = expand_string(tp->batch_id);
2404 deliver_set_expansions(NULL);
2407 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2408 "in %s transport (%s): %s", tp->name, next->address,
2409 expand_string_message);
2412 else ok = (Ustrcmp(batch_id, bid) == 0);
2415 /* Take address into batch if OK. */
2419 *anchor = next->next; /* Include the address */
2425 else anchor = &(next->next); /* Skip the address */
2429 /* We now have one or more addresses that can be delivered in a batch. Check
2430 whether the transport is prepared to accept a message of this size. If not,
2431 fail them all forthwith. If the expansion fails, or does not yield an
2432 integer, defer delivery. */
2434 if (tp->message_size_limit != NULL)
2436 int rc = check_message_size(tp, addr);
2439 replicate_status(addr);
2440 while (addr != NULL)
2443 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2446 continue; /* With next batch of addresses */
2450 /* If we are not running the queue, or if forcing, all deliveries will be
2451 attempted. Otherwise, we must respect the retry times for each address. Even
2452 when not doing this, we need to set up the retry key string, and determine
2453 whether a retry record exists, because after a successful delivery, a delete
2454 retry item must be set up. Keep the retry database open only for the duration
2455 of these checks, rather than for all local deliveries, because some local
2456 deliveries (e.g. to pipes) can take a substantial time. */
2458 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
2459 if (dbm_file == NULL)
2461 DEBUG(D_deliver|D_retry|D_hints_lookup)
2462 debug_printf("no retry data available\n");
2467 while (addr2 != NULL)
2469 BOOL ok = TRUE; /* to deliver this address */
2472 /* Set up the retry key to include the domain or not, and change its
2473 leading character from "R" to "T". Must make a copy before doing this,
2474 because the old key may be pointed to from a "delete" retry item after
2477 retry_key = string_copy(
2478 (tp->retry_use_local_part)? addr2->address_retry_key :
2479 addr2->domain_retry_key);
2482 /* Inspect the retry data. If there is no hints file, delivery happens. */
2484 if (dbm_file != NULL)
2486 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2488 /* If there is no retry record, delivery happens. If there is,
2489 remember it exists so it can be deleted after a successful delivery. */
2491 if (retry_record != NULL)
2493 setflag(addr2, af_lt_retry_exists);
2495 /* A retry record exists for this address. If queue running and not
2496 forcing, inspect its contents. If the record is too old, or if its
2497 retry time has come, or if it has passed its cutoff time, delivery
2502 debug_printf("retry record exists: age=%s ",
2503 readconf_printtime(now - retry_record->time_stamp));
2504 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2505 debug_printf(" time to retry = %s expired = %d\n",
2506 readconf_printtime(retry_record->next_try - now),
2507 retry_record->expired);
2510 if (queue_running && !deliver_force)
2512 ok = (now - retry_record->time_stamp > retry_data_expire) ||
2513 (now >= retry_record->next_try) ||
2514 retry_record->expired;
2516 /* If we haven't reached the retry time, there is one more check
2517 to do, which is for the ultimate address timeout. */
2520 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2524 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2527 /* This address is to be delivered. Leave it on the chain. */
2532 addr2 = addr2->next;
2535 /* This address is to be deferred. Take it out of the chain, and
2536 post-process it as complete. Must take it out of the chain first,
2537 because post processing puts it on another chain. */
2541 address_item *this = addr2;
2542 this->message = US"Retry time not yet reached";
2543 this->basic_errno = ERRNO_LRETRY;
2544 if (addr3 == NULL) addr2 = addr = addr2->next;
2545 else addr2 = addr3->next = addr2->next;
2546 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2550 if (dbm_file != NULL) dbfn_close(dbm_file);
2552 /* If there are no addresses left on the chain, they all deferred. Loop
2553 for the next set of addresses. */
2555 if (addr == NULL) continue;
2557 /* So, finally, we do have some addresses that can be passed to the
2558 transport. Before doing so, set up variables that are relevant to a
2561 deliver_set_expansions(addr);
2562 delivery_start = time(NULL);
2563 deliver_local(addr, FALSE);
2564 deliver_time = (int)(time(NULL) - delivery_start);
2566 /* If a shadow transport (which must perforce be another local transport), is
2567 defined, and its condition is met, we must pass the message to the shadow
2568 too, but only those addresses that succeeded. We do this by making a new
2569 chain of addresses - also to keep the original chain uncontaminated. We must
2570 use a chain rather than doing it one by one, because the shadow transport may
2573 NOTE: if the condition fails because of a lookup defer, there is nothing we
2576 if (tp->shadow != NULL &&
2577 (tp->shadow_condition == NULL ||
2578 expand_check_condition(tp->shadow_condition, tp->name, US"transport")))
2580 transport_instance *stp;
2581 address_item *shadow_addr = NULL;
2582 address_item **last = &shadow_addr;
2584 for (stp = transports; stp != NULL; stp = stp->next)
2585 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
2588 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
2591 /* Pick off the addresses that have succeeded, and make clones. Put into
2592 the shadow_message field a pointer to the shadow_message field of the real
2595 else for (addr2 = addr; addr2 != NULL; addr2 = addr2->next)
2597 if (addr2->transport_return != OK) continue;
2598 addr3 = store_get(sizeof(address_item));
2601 addr3->shadow_message = (uschar *)(&(addr2->shadow_message));
2602 addr3->transport = stp;
2603 addr3->transport_return = DEFER;
2604 addr3->return_filename = NULL;
2605 addr3->return_file = -1;
2607 last = &(addr3->next);
2610 /* If we found any addresses to shadow, run the delivery, and stick any
2611 message back into the shadow_message field in the original. */
2613 if (shadow_addr != NULL)
2615 int save_count = transport_count;
2617 DEBUG(D_deliver|D_transport)
2618 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2619 deliver_local(shadow_addr, TRUE);
2621 for(; shadow_addr != NULL; shadow_addr = shadow_addr->next)
2623 int sresult = shadow_addr->transport_return;
2624 *((uschar **)(shadow_addr->shadow_message)) = (sresult == OK)?
2625 string_sprintf(" ST=%s", stp->name) :
2626 string_sprintf(" ST=%s (%s%s%s)", stp->name,
2627 (shadow_addr->basic_errno <= 0)?
2628 US"" : US strerror(shadow_addr->basic_errno),
2629 (shadow_addr->basic_errno <= 0 || shadow_addr->message == NULL)?
2631 (shadow_addr->message != NULL)? shadow_addr->message :
2632 (shadow_addr->basic_errno <= 0)? US"unknown error" : US"");
2634 DEBUG(D_deliver|D_transport)
2635 debug_printf("%s shadow transport returned %s for %s\n",
2637 (sresult == OK)? "OK" :
2638 (sresult == DEFER)? "DEFER" :
2639 (sresult == FAIL)? "FAIL" :
2640 (sresult == PANIC)? "PANIC" : "?",
2641 shadow_addr->address);
2644 DEBUG(D_deliver|D_transport)
2645 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2647 transport_count = save_count; /* Restore original transport count */
2651 /* Cancel the expansions that were set up for the delivery. */
2653 deliver_set_expansions(NULL);
2655 /* Now we can process the results of the real transport. We must take each
2656 address off the chain first, because post_process_one() puts it on another
2659 for (addr2 = addr; addr2 != NULL; addr2 = nextaddr)
2661 int result = addr2->transport_return;
2662 nextaddr = addr2->next;
2664 DEBUG(D_deliver|D_transport)
2665 debug_printf("%s transport returned %s for %s\n",
2667 (result == OK)? "OK" :
2668 (result == DEFER)? "DEFER" :
2669 (result == FAIL)? "FAIL" :
2670 (result == PANIC)? "PANIC" : "?",
2673 /* If there is a retry_record, or if delivery is deferred, build a retry
2674 item for setting a new retry time or deleting the old retry record from
2675 the database. These items are handled all together after all addresses
2676 have been handled (so the database is open just for a short time for
2679 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
2681 int flags = (result == DEFER)? 0 : rf_delete;
2682 uschar *retry_key = string_copy((tp->retry_use_local_part)?
2683 addr2->address_retry_key : addr2->domain_retry_key);
2685 retry_add_item(addr2, retry_key, flags);
2688 /* Done with this address */
2690 if (result == OK) addr2->more_errno = deliver_time;
2691 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
2693 /* If a pipe delivery generated text to be sent back, the result may be
2694 changed to FAIL, and we must copy this for subsequent addresses in the
2697 if (addr2->transport_return != result)
2699 for (addr3 = nextaddr; addr3 != NULL; addr3 = addr3->next)
2701 addr3->transport_return = addr2->transport_return;
2702 addr3->basic_errno = addr2->basic_errno;
2703 addr3->message = addr2->message;
2705 result = addr2->transport_return;
2708 /* Whether or not the result was changed to FAIL, we need to copy the
2709 return_file value from the first address into all the addresses of the
2710 batch, so they are all listed in the error message. */
2712 addr2->return_file = addr->return_file;
2714 /* Change log character for recording successful deliveries. */
2716 if (result == OK) logchar = '-';
2718 } /* Loop back for next batch of addresses */
2724 /*************************************************
2725 * Sort remote deliveries *
2726 *************************************************/
2728 /* This function is called if remote_sort_domains is set. It arranges that the
2729 chain of addresses for remote deliveries is ordered according to the strings
2730 specified. Try to make this shuffling reasonably efficient by handling
2731 sequences of addresses rather than just single ones.
2738 sort_remote_deliveries(void)
2741 address_item **aptr = &addr_remote;
2742 uschar *listptr = remote_sort_domains;
2746 while (*aptr != NULL &&
2747 (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
2750 address_item *moved = NULL;
2751 address_item **bptr = &moved;
2753 while (*aptr != NULL)
2755 address_item **next;
2756 deliver_domain = (*aptr)->domain; /* set $domain */
2757 if (match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1,
2758 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
2760 aptr = &((*aptr)->next);
2764 next = &((*aptr)->next);
2765 while (*next != NULL &&
2766 (deliver_domain = (*next)->domain, /* Set $domain */
2767 match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1,
2768 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK)
2769 next = &((*next)->next);
2771 /* If the batch of non-matchers is at the end, add on any that were
2772 extracted further up the chain, and end this iteration. Otherwise,
2773 extract them from the chain and hang on the moved chain. */
2785 aptr = &((*aptr)->next);
2788 /* If the loop ended because the final address matched, *aptr will
2789 be NULL. Add on to the end any extracted non-matching addresses. If
2790 *aptr is not NULL, the loop ended via "break" when *next is null, that
2791 is, there was a string of non-matching addresses at the end. In this
2792 case the extracted addresses have already been added on the end. */
2794 if (*aptr == NULL) *aptr = moved;
2800 debug_printf("remote addresses after sorting:\n");
2801 for (addr = addr_remote; addr != NULL; addr = addr->next)
2802 debug_printf(" %s\n", addr->address);
2808 /*************************************************
2809 * Read from pipe for remote delivery subprocess *
2810 *************************************************/
2812 /* This function is called when the subprocess is complete, but can also be
2813 called before it is complete, in order to empty a pipe that is full (to prevent
2814 deadlock). It must therefore keep track of its progress in the parlist data
2817 We read the pipe to get the delivery status codes and a possible error message
2818 for each address, optionally preceded by unusability data for the hosts and
2819 also by optional retry data.
2821 Read in large chunks into the big buffer and then scan through, interpreting
2822 the data therein. In most cases, only a single read will be necessary. No
2823 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
2824 that we read the next chunk when there is less than 2500 bytes left in the
2825 non-final chunk, we can assume each item is complete in the buffer before
2826 handling it. Each item is written using a single write(), which is atomic for
2827 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
2828 often bigger) so even if we are reading while the subprocess is still going, we
2829 should never have only a partial item in the buffer.
2832 poffset the offset of the parlist item
2833 eop TRUE if the process has completed
2835 Returns: TRUE if the terminating 'Z' item has been read,
2836 or there has been a disaster (i.e. no more data needed);
2841 par_read_pipe(int poffset, BOOL eop)
2844 pardata *p = parlist + poffset;
2845 address_item *addrlist = p->addrlist;
2846 address_item *addr = p->addr;
2849 uschar *endptr = big_buffer;
2850 uschar *ptr = endptr;
2851 uschar *msg = p->msg;
2852 BOOL done = p->done;
2853 BOOL unfinished = TRUE;
2855 /* Loop through all items, reading from the pipe when necessary. The pipe
2856 is set up to be non-blocking, but there are two different Unix mechanisms in
2857 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
2858 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
2859 which returns 0 for both end of file and no more data. We distinguish the
2860 two cases by taking 0 as end of file only when we know the process has
2863 Each separate item is written to the pipe in a single write(), and as they are
2864 all short items, the writes will all be atomic and we should never find
2865 ourselves in the position of having read an incomplete item. "Short" in this
2866 case can mean up to about 1K in the case when there is a long error message
2867 associated with an address. */
2869 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
2870 (int)p->pid, eop? "ended" : "not ended");
2874 retry_item *r, **rp;
2875 int remaining = endptr - ptr;
2877 /* Read (first time) or top up the chars in the buffer if necessary.
2878 There will be only one read if we get all the available data (i.e. don't
2879 fill the buffer completely). */
2881 if (remaining < 2500 && unfinished)
2884 int available = big_buffer_size - remaining;
2886 if (remaining > 0) memmove(big_buffer, ptr, remaining);
2889 endptr = big_buffer + remaining;
2890 len = read(fd, endptr, available);
2892 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
2894 /* If the result is EAGAIN and the process is not complete, just
2895 stop reading any more and process what we have already. */
2899 if (!eop && errno == EAGAIN) len = 0; else
2901 msg = string_sprintf("failed to read pipe from transport process "
2902 "%d for transport %s: %s", pid, addr->transport->driver_name,
2908 /* If the length is zero (eof or no-more-data), just process what we
2909 already have. Note that if the process is still running and we have
2910 read all the data in the pipe (but less that "available") then we
2911 won't read any more, as "unfinished" will get set FALSE. */
2914 unfinished = len == available;
2917 /* If we are at the end of the available data, exit the loop. */
2919 if (ptr >= endptr) break;
2921 /* Handle each possible type of item, assuming the complete item is
2922 available in store. */
2926 /* Host items exist only if any hosts were marked unusable. Match
2927 up by checking the IP address. */
2930 for (h = addrlist->host_list; h != NULL; h = h->next)
2932 if (h->address == NULL || Ustrcmp(h->address, ptr+2) != 0) continue;
2940 /* Retry items are sent in a preceding R item for each address. This is
2941 kept separate to keep each message short enough to guarantee it won't
2942 be split in the pipe. Hopefully, in the majority of cases, there won't in
2943 fact be any retry items at all.
2945 The complete set of retry items might include an item to delete a
2946 routing retry if there was a previous routing delay. However, routing
2947 retries are also used when a remote transport identifies an address error.
2948 In that case, there may also be an "add" item for the same key. Arrange
2949 that a "delete" item is dropped in favour of an "add" item. */
2952 if (addr == NULL) goto ADDR_MISMATCH;
2954 DEBUG(D_deliver|D_retry)
2955 debug_printf("reading retry information for %s from subprocess\n",
2958 /* Cut out any "delete" items on the list. */
2960 for (rp = &(addr->retries); (r = *rp) != NULL; rp = &(r->next))
2962 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
2964 if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */
2965 *rp = r->next; /* Excise a delete item */
2966 DEBUG(D_deliver|D_retry)
2967 debug_printf(" existing delete item dropped\n");
2971 /* We want to add a delete item only if there is no non-delete item;
2972 however we still have to step ptr through the data. */
2974 if (r == NULL || (*ptr & rf_delete) == 0)
2976 r = store_get(sizeof(retry_item));
2977 r->next = addr->retries;
2980 r->key = string_copy(ptr);
2982 memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno));
2983 ptr += sizeof(r->basic_errno);
2984 memcpy(&(r->more_errno), ptr, sizeof(r->more_errno));
2985 ptr += sizeof(r->more_errno);
2986 r->message = (*ptr)? string_copy(ptr) : NULL;
2987 DEBUG(D_deliver|D_retry)
2988 debug_printf(" added %s item\n",
2989 ((r->flags & rf_delete) == 0)? "retry" : "delete");
2994 DEBUG(D_deliver|D_retry)
2995 debug_printf(" delete item not added: non-delete item exists\n");
2998 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3004 /* Put the amount of data written into the parlist block */
3007 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3008 ptr += sizeof(transport_count);
3011 /* Address items are in the order of items on the address chain. We
3012 remember the current address value in case this function is called
3013 several times to empty the pipe in stages. Information about delivery
3014 over TLS is sent in a preceding X item for each address. We don't put
3015 it in with the other info, in order to keep each message short enough to
3016 guarantee it won't be split in the pipe. */
3020 if (addr == NULL) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3024 addr->cipher = NULL;
3025 addr->peerdn = NULL;
3028 addr->cipher = string_copy(ptr);
3031 addr->peerdn = string_copy(ptr);
3035 addr->peercert = NULL;
3037 (void) tls_import_cert(ptr, &addr->peercert);
3041 addr->ourcert = NULL;
3043 (void) tls_import_cert(ptr, &addr->ourcert);
3046 # ifndef DISABLE_OCSP
3048 addr->ocsp = OCSP_NOT_REQ;
3050 addr->ocsp = *ptr - '0';
3056 #endif /*SUPPORT_TLS*/
3058 case 'C': /* client authenticator information */
3062 addr->authenticator = (*ptr)? string_copy(ptr) : NULL;
3065 addr->auth_id = (*ptr)? string_copy(ptr) : NULL;
3068 addr->auth_sndr = (*ptr)? string_copy(ptr) : NULL;
3074 #ifndef DISABLE_PRDR
3076 addr->flags |= af_prdr_used;
3080 #ifdef EXPERIMENTAL_DSN
3082 if (addr == NULL) break;
3083 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3084 ptr += sizeof(addr->dsn_aware);
3085 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3093 msg = string_sprintf("address count mismatch for data read from pipe "
3094 "for transport process %d for transport %s", pid,
3095 addrlist->transport->driver_name);
3100 addr->transport_return = *ptr++;
3101 addr->special_action = *ptr++;
3102 memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno));
3103 ptr += sizeof(addr->basic_errno);
3104 memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno));
3105 ptr += sizeof(addr->more_errno);
3106 memcpy(&(addr->flags), ptr, sizeof(addr->flags));
3107 ptr += sizeof(addr->flags);
3108 addr->message = (*ptr)? string_copy(ptr) : NULL;
3110 addr->user_message = (*ptr)? string_copy(ptr) : NULL;
3113 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3117 h = store_get(sizeof(host_item));
3118 h->name = string_copy(ptr);
3120 h->address = string_copy(ptr);
3122 memcpy(&(h->port), ptr, sizeof(h->port));
3123 ptr += sizeof(h->port);
3124 h->dnssec = *ptr == '2' ? DS_YES
3125 : *ptr == '1' ? DS_NO
3128 addr->host_used = h;
3132 /* Finished with this address */
3137 /* Z marks the logical end of the data. It is followed by '0' if
3138 continue_transport was NULL at the end of transporting, otherwise '1'.
3139 We need to know when it becomes NULL during a delivery down a passed SMTP
3140 channel so that we don't try to pass anything more down it. Of course, for
3141 most normal messages it will remain NULL all the time. */
3146 continue_transport = NULL;
3147 continue_hostname = NULL;
3150 DEBUG(D_deliver) debug_printf("Z%c item read\n", *ptr);
3153 /* Anything else is a disaster. */
3156 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3157 "process %d for transport %s", ptr[-1], pid,
3158 addr->transport->driver_name);
3164 /* The done flag is inspected externally, to determine whether or not to
3165 call the function again when the process finishes. */
3169 /* If the process hadn't finished, and we haven't seen the end of the data
3170 or suffered a disaster, update the rest of the state, and return FALSE to
3171 indicate "not finished". */
3180 /* Close our end of the pipe, to prevent deadlock if the far end is still
3181 pushing stuff into it. */
3186 /* If we have finished without error, but haven't had data for every address,
3187 something is wrong. */
3189 if (msg == NULL && addr != NULL)
3190 msg = string_sprintf("insufficient address data read from pipe "
3191 "for transport process %d for transport %s", pid,
3192 addr->transport->driver_name);
3194 /* If an error message is set, something has gone wrong in getting back
3195 the delivery data. Put the message into each address and freeze it. */
3199 for (addr = addrlist; addr != NULL; addr = addr->next)
3201 addr->transport_return = DEFER;
3202 addr->special_action = SPECIAL_FREEZE;
3203 addr->message = msg;
3207 /* Return TRUE to indicate we have got all we need from this process, even
3208 if it hasn't actually finished yet. */
3215 /*************************************************
3216 * Post-process a set of remote addresses *
3217 *************************************************/
3219 /* Do what has to be done immediately after a remote delivery for each set of
3220 addresses, then re-write the spool if necessary. Note that post_process_one
3221 puts the address on an appropriate queue; hence we must fish off the next
3222 one first. This function is also called if there is a problem with setting
3223 up a subprocess to do a remote delivery in parallel. In this case, the final
3224 argument contains a message, and the action must be forced to DEFER.
3227 addr pointer to chain of address items
3228 logflags flags for logging
3229 msg NULL for normal cases; -> error message for unexpected problems
3230 fallback TRUE if processing fallback hosts
3236 remote_post_process(address_item *addr, int logflags, uschar *msg,
3241 /* If any host addresses were found to be unusable, add them to the unusable
3242 tree so that subsequent deliveries don't try them. */
3244 for (h = addr->host_list; h != NULL; h = h->next)
3246 if (h->address == NULL) continue;
3247 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3250 /* Now handle each address on the chain. The transport has placed '=' or '-'
3251 into the special_action field for each successful delivery. */
3253 while (addr != NULL)
3255 address_item *next = addr->next;
3257 /* If msg == NULL (normal processing) and the result is DEFER and we are
3258 processing the main hosts and there are fallback hosts available, put the
3259 address on the list for fallback delivery. */
3261 if (addr->transport_return == DEFER &&
3262 addr->fallback_hosts != NULL &&
3266 addr->host_list = addr->fallback_hosts;
3267 addr->next = addr_fallback;
3268 addr_fallback = addr;
3269 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3272 /* If msg is set (=> unexpected problem), set it in the address before
3273 doing the ordinary post processing. */
3279 addr->message = msg;
3280 addr->transport_return = DEFER;
3282 (void)post_process_one(addr, addr->transport_return, logflags,
3283 DTYPE_TRANSPORT, addr->special_action);
3291 /* If we have just delivered down a passed SMTP channel, and that was
3292 the last address, the channel will have been closed down. Now that
3293 we have logged that delivery, set continue_sequence to 1 so that
3294 any subsequent deliveries don't get "*" incorrectly logged. */
3296 if (continue_transport == NULL) continue_sequence = 1;
3301 /*************************************************
3302 * Wait for one remote delivery subprocess *
3303 *************************************************/
3305 /* This function is called while doing remote deliveries when either the
3306 maximum number of processes exist and we need one to complete so that another
3307 can be created, or when waiting for the last ones to complete. It must wait for
3308 the completion of one subprocess, empty the control block slot, and return a
3309 pointer to the address chain.
3312 Returns: pointer to the chain of addresses handled by the process;
3313 NULL if no subprocess found - this is an unexpected error
3316 static address_item *
3319 int poffset, status;
3320 address_item *addr, *addrlist;
3323 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3324 "to finish", message_id);
3326 /* Loop until either a subprocess completes, or there are no subprocesses in
3327 existence - in which case give an error return. We cannot proceed just by
3328 waiting for a completion, because a subprocess may have filled up its pipe, and
3329 be waiting for it to be emptied. Therefore, if no processes have finished, we
3330 wait for one of the pipes to acquire some data by calling select(), with a
3331 timeout just in case.
3333 The simple approach is just to iterate after reading data from a ready pipe.
3334 This leads to non-ideal behaviour when the subprocess has written its final Z
3335 item, closed the pipe, and is in the process of exiting (the common case). A
3336 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3337 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3340 To avoid this, if all the data that is needed has been read from a subprocess
3341 after select(), an explicit wait() for it is done. We know that all it is doing
3342 is writing to the pipe and then exiting, so the wait should not be long.
3344 The non-blocking waitpid() is to some extent just insurance; if we could
3345 reliably detect end-of-file on the pipe, we could always know when to do a
3346 blocking wait() for a completed process. However, because some systems use
3347 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3348 use code that functions without the need to recognize EOF.
3350 There's a double loop here just in case we end up with a process that is not in
3351 the list of remote delivery processes. Something has obviously gone wrong if
3352 this is the case. (For example, a process that is incorrectly left over from
3353 routing or local deliveries might be found.) The damage can be minimized by
3354 looping back and looking for another process. If there aren't any, the error
3355 return will happen. */
3357 for (;;) /* Normally we do not repeat this loop */
3359 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3362 fd_set select_pipes;
3363 int maxpipe, readycount;
3365 /* A return value of -1 can mean several things. If errno != ECHILD, it
3366 either means invalid options (which we discount), or that this process was
3367 interrupted by a signal. Just loop to try the waitpid() again.
3369 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3370 in existence. This should never happen, and is an unexpected error.
3371 However, there is a nasty complication when running under Linux. If "strace
3372 -f" is being used under Linux to trace this process and its children,
3373 subprocesses are "stolen" from their parents and become the children of the
3374 tracing process. A general wait such as the one we've just obeyed returns
3375 as if there are no children while subprocesses are running. Once a
3376 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3377 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3380 This does not happen using "truss" on Solaris, nor (I think) with other
3381 tracing facilities on other OS. It seems to be specific to Linux.
3383 What we do to get round this is to use kill() to see if any of our
3384 subprocesses are still in existence. If kill() gives an OK return, we know
3385 it must be for one of our processes - it can't be for a re-use of the pid,
3386 because if our process had finished, waitpid() would have found it. If any
3387 of our subprocesses are in existence, we proceed to use select() as if
3388 waitpid() had returned zero. I think this is safe. */
3392 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3395 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3396 "for process existence\n");
3398 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3400 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3402 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3403 "stolen by strace\n", (int)pid);
3404 break; /* With poffset set */
3408 if (poffset >= remote_max_parallel)
3410 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3411 return NULL; /* This is the error return */
3415 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3416 been handled above. A return value of zero means that there is at least one
3417 subprocess, but there are no completed subprocesses. See if any pipes are
3418 ready with any data for reading. */
3420 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3423 FD_ZERO(&select_pipes);
3424 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3426 if (parlist[poffset].pid != 0)
3428 int fd = parlist[poffset].fd;
3429 FD_SET(fd, &select_pipes);
3430 if (fd > maxpipe) maxpipe = fd;
3434 /* Stick in a 60-second timeout, just in case. */
3439 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3442 /* Scan through the pipes and read any that are ready; use the count
3443 returned by select() to stop when there are no more. Select() can return
3444 with no processes (e.g. if interrupted). This shouldn't matter.
3446 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3447 read, or there was a disaster. In either case, we are finished with this
3448 process. Do an explicit wait() for the process and break the main loop if
3451 It turns out that we have to deal with the case of an interrupted system
3452 call, which can happen on some operating systems if the signal handling is
3453 set up to do that by default. */
3456 readycount > 0 && poffset < remote_max_parallel;
3459 if ((pid = parlist[poffset].pid) != 0 &&
3460 FD_ISSET(parlist[poffset].fd, &select_pipes))
3463 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3465 for (;;) /* Loop for signals */
3467 pid_t endedpid = waitpid(pid, &status, 0);
3468 if (endedpid == pid) goto PROCESS_DONE;
3469 if (endedpid != (pid_t)(-1) || errno != EINTR)
3470 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3471 "%d (errno = %d) from waitpid() for process %d",
3472 (int)endedpid, errno, (int)pid);
3478 /* Now go back and look for a completed subprocess again. */
3481 /* A completed process was detected by the non-blocking waitpid(). Find the
3482 data block that corresponds to this subprocess. */
3484 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3485 if (pid == parlist[poffset].pid) break;
3487 /* Found the data block; this is a known remote delivery process. We don't
3488 need to repeat the outer loop. This should be what normally happens. */
3490 if (poffset < remote_max_parallel) break;
3492 /* This situation is an error, but it's probably better to carry on looking
3493 for another process than to give up (as we used to do). */
3495 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
3496 "transport process list", pid);
3497 } /* End of the "for" loop */
3499 /* Come here when all the data was completely read after a select(), and
3500 the process in pid has been wait()ed for. */
3507 debug_printf("remote delivery process %d ended\n", (int)pid);
3509 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
3513 set_process_info("delivering %s", message_id);
3515 /* Get the chain of processed addresses */
3517 addrlist = parlist[poffset].addrlist;
3519 /* If the process did not finish cleanly, record an error and freeze (except
3520 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3521 in case the delivery did actually happen. */
3523 if ((status & 0xffff) != 0)
3526 int msb = (status >> 8) & 255;
3527 int lsb = status & 255;
3528 int code = (msb == 0)? (lsb & 0x7f) : msb;
3530 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
3532 addrlist->transport->driver_name,
3534 (msb == 0)? "terminated by signal" : "exit code",
3537 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
3538 addrlist->special_action = SPECIAL_FREEZE;
3540 for (addr = addrlist; addr != NULL; addr = addr->next)
3542 addr->transport_return = DEFER;
3543 addr->message = msg;
3546 remove_journal = FALSE;
3549 /* Else complete reading the pipe to get the result of the delivery, if all
3550 the data has not yet been obtained. */
3552 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
3554 /* Put the data count and return path into globals, mark the data slot unused,
3555 decrement the count of subprocesses, and return the address chain. */
3557 transport_count = parlist[poffset].transport_count;
3558 used_return_path = parlist[poffset].return_path;
3559 parlist[poffset].pid = 0;
3566 /*************************************************
3567 * Wait for subprocesses and post-process *
3568 *************************************************/
3570 /* This function waits for subprocesses until the number that are still running
3571 is below a given threshold. For each complete subprocess, the addresses are
3572 post-processed. If we can't find a running process, there is some shambles.
3573 Better not bomb out, as that might lead to multiple copies of the message. Just
3574 log and proceed as if all done.
3577 max maximum number of subprocesses to leave running
3578 fallback TRUE if processing fallback hosts
3584 par_reduce(int max, BOOL fallback)
3586 while (parcount > max)
3588 address_item *doneaddr = par_wait();
3589 if (doneaddr == NULL)
3591 log_write(0, LOG_MAIN|LOG_PANIC,
3592 "remote delivery process count got out of step");
3595 else remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
3603 rmt_dlv_checked_write(int fd, void * buf, int size)
3605 int ret = write(fd, buf, size);
3607 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed writing transport result to pipe: %s\n",
3608 ret == -1 ? strerror(errno) : "short write");
3611 /*************************************************
3612 * Do remote deliveries *
3613 *************************************************/
3615 /* This function is called to process the addresses in addr_remote. We must
3616 pick off the queue all addresses that have the same transport, remote
3617 destination, and errors address, and hand them to the transport in one go,
3618 subject to some configured limitations. If this is a run to continue delivering
3619 to an existing delivery channel, skip all but those addresses that can go to
3620 that channel. The skipped addresses just get deferred.
3622 If mua_wrapper is set, all addresses must be able to be sent in a single
3623 transaction. If not, this function yields FALSE.
3625 In Exim 4, remote deliveries are always done in separate processes, even
3626 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
3627 is so that the base process can retain privilege. This makes the
3628 implementation of fallback transports feasible (though not initially done.)
3630 We create up to the configured number of subprocesses, each of which passes
3631 back the delivery state via a pipe. (However, when sending down an existing
3632 connection, remote_max_parallel is forced to 1.)
3635 fallback TRUE if processing fallback hosts
3637 Returns: TRUE normally
3638 FALSE if mua_wrapper is set and the addresses cannot all be sent
3643 do_remote_deliveries(BOOL fallback)
3649 parcount = 0; /* Number of executing subprocesses */
3651 /* When sending down an existing channel, only do one delivery at a time.
3652 We use a local variable (parmax) to hold the maximum number of processes;
3653 this gets reduced from remote_max_parallel if we can't create enough pipes. */
3655 if (continue_transport != NULL) remote_max_parallel = 1;
3656 parmax = remote_max_parallel;
3658 /* If the data for keeping a list of processes hasn't yet been
3661 if (parlist == NULL)
3663 parlist = store_get(remote_max_parallel * sizeof(pardata));
3664 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3665 parlist[poffset].pid = 0;
3668 /* Now loop for each remote delivery */
3670 for (delivery_count = 0; addr_remote != NULL; delivery_count++)
3676 int address_count = 1;
3677 int address_count_max;
3679 BOOL use_initgroups;
3680 BOOL pipe_done = FALSE;
3681 transport_instance *tp;
3682 address_item **anchor = &addr_remote;
3683 address_item *addr = addr_remote;
3684 address_item *last = addr;
3687 /* Pull the first address right off the list. */
3689 addr_remote = addr->next;
3692 DEBUG(D_deliver|D_transport)
3693 debug_printf("--------> %s <--------\n", addr->address);
3695 /* If no transport has been set, there has been a big screw-up somewhere. */
3697 if ((tp = addr->transport) == NULL)
3699 disable_logging = FALSE; /* Jic */
3700 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3701 US"No transport set by router", fallback);
3705 /* Check that this base address hasn't previously been delivered to this
3706 transport. The check is necessary at this point to handle homonymic addresses
3707 correctly in cases where the pattern of redirection changes between delivery
3708 attempts. Non-homonymic previous delivery is detected earlier, at routing
3711 if (previously_transported(addr, FALSE)) continue;
3713 /* Force failure if the message is too big. */
3715 if (tp->message_size_limit != NULL)
3717 int rc = check_message_size(tp, addr);
3720 addr->transport_return = rc;
3721 remote_post_process(addr, LOG_MAIN, NULL, fallback);
3726 /* Get the flag which specifies whether the transport can handle different
3727 domains that nevertheless resolve to the same set of hosts. */
3729 multi_domain = tp->multi_domain;
3731 /* Get the maximum it can handle in one envelope, with zero meaning
3732 unlimited, which is forced for the MUA wrapper case. */
3734 address_count_max = tp->max_addresses;
3735 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
3738 /************************************************************************/
3739 /***** This is slightly experimental code, but should be safe. *****/
3741 /* The address_count_max value is the maximum number of addresses that the
3742 transport can send in one envelope. However, the transport must be capable of
3743 dealing with any number of addresses. If the number it gets exceeds its
3744 envelope limitation, it must send multiple copies of the message. This can be
3745 done over a single connection for SMTP, so uses less resources than making
3746 multiple connections. On the other hand, if remote_max_parallel is greater
3747 than one, it is perhaps a good idea to use parallel processing to move the
3748 message faster, even if that results in multiple simultaneous connections to
3751 How can we come to some compromise between these two ideals? What we do is to
3752 limit the number of addresses passed to a single instance of a transport to
3753 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
3754 number of addresses routed to remote transports divided by
3755 remote_max_parallel. For example, if the message has 100 remote recipients,
3756 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
3757 once. But if rcpt_max is 100, we could send up to 100.
3759 Of course, not all the remotely addresses in a message are going to go to the
3760 same set of hosts (except in smarthost configurations), so this is just a
3761 heuristic way of dividing up the work.
3763 Furthermore (1), because this may not be wanted in some cases, and also to
3764 cope with really pathological cases, there is also a limit to the number of
3765 messages that are sent over one connection. This is the same limit that is
3766 used when sending several different messages over the same connection.
3767 Continue_sequence is set when in this situation, to the number sent so
3768 far, including this message.
3770 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
3771 is probably because they are using VERP, in which case they want to pass only
3772 one address at a time to the transport, in order to be able to use
3773 $local_part and $domain in constructing a new return path. We could test for
3774 the use of these variables, but as it is so likely they will be used when the
3775 maximum is 1, we don't bother. Just leave the value alone. */
3777 if (address_count_max != 1 &&
3778 address_count_max < remote_delivery_count/remote_max_parallel)
3780 int new_max = remote_delivery_count/remote_max_parallel;
3781 int message_max = tp->connection_max_messages;
3782 if (connection_max_messages >= 0) message_max = connection_max_messages;
3783 message_max -= continue_sequence - 1;
3784 if (message_max > 0 && new_max > address_count_max * message_max)
3785 new_max = address_count_max * message_max;
3786 address_count_max = new_max;
3789 /************************************************************************/
3792 /* Pick off all addresses which have the same transport, errors address,
3793 destination, and extra headers. In some cases they point to the same host
3794 list, but we also need to check for identical host lists generated from
3795 entirely different domains. The host list pointers can be NULL in the case
3796 where the hosts are defined in the transport. There is also a configured
3797 maximum limit of addresses that can be handled at once (see comments above
3798 for how it is computed). */
3800 while ((next = *anchor) != NULL && address_count < address_count_max)
3802 if ((multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
3804 tp == next->transport
3806 same_hosts(next->host_list, addr->host_list)
3808 same_strings(next->p.errors_address, addr->p.errors_address)
3810 same_headers(next->p.extra_headers, addr->p.extra_headers)
3812 same_ugid(tp, next, addr)
3814 (next->p.remove_headers == addr->p.remove_headers ||
3815 (next->p.remove_headers != NULL &&
3816 addr->p.remove_headers != NULL &&
3817 Ustrcmp(next->p.remove_headers, addr->p.remove_headers) == 0)))
3819 *anchor = next->next;
3821 next->first = addr; /* remember top one (for retry processing) */
3826 else anchor = &(next->next);
3829 /* If we are acting as an MUA wrapper, all addresses must go in a single
3830 transaction. If not, put them back on the chain and yield FALSE. */
3832 if (mua_wrapper && addr_remote != NULL)
3834 last->next = addr_remote;
3839 /* Set up the expansion variables for this set of addresses */
3841 deliver_set_expansions(addr);
3843 /* Ensure any transport-set auth info is fresh */
3844 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
3846 /* Compute the return path, expanding a new one if required. The old one
3847 must be set first, as it might be referred to in the expansion. */
3849 if(addr->p.errors_address != NULL)
3850 return_path = addr->p.errors_address;
3851 #ifdef EXPERIMENTAL_SRS
3852 else if(addr->p.srs_sender != NULL)
3853 return_path = addr->p.srs_sender;
3856 return_path = sender_address;
3858 if (tp->return_path != NULL)
3860 uschar *new_return_path = expand_string(tp->return_path);
3861 if (new_return_path == NULL)
3863 if (!expand_string_forcedfail)
3865 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
3866 string_sprintf("Failed to expand return path \"%s\": %s",
3867 tp->return_path, expand_string_message), fallback);
3871 else return_path = new_return_path;
3874 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
3875 logs and sets up error messages, so we just post-process and continue with
3876 the next address. */
3878 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
3880 remote_post_process(addr, LOG_MAIN|LOG_PANIC, NULL, fallback);
3884 /* If this transport has a setup function, call it now so that it gets
3885 run in this process and not in any subprocess. That way, the results of
3886 any setup that are retained by the transport can be reusable. One of the
3887 things the setup does is to set the fallback host lists in the addresses.
3888 That is why it is called at this point, before the continue delivery
3889 processing, because that might use the fallback hosts. */
3891 if (tp->setup != NULL)
3892 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
3894 /* If this is a run to continue delivery down an already-established
3895 channel, check that this set of addresses matches the transport and
3896 the channel. If it does not, defer the addresses. If a host list exists,
3897 we must check that the continue host is on the list. Otherwise, the
3898 host is set in the transport. */
3900 continue_more = FALSE; /* In case got set for the last lot */
3901 if (continue_transport != NULL)
3903 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
3904 if (ok && addr->host_list != NULL)
3908 for (h = addr->host_list; h != NULL; h = h->next)
3910 if (Ustrcmp(h->name, continue_hostname) == 0)
3911 { ok = TRUE; break; }
3915 /* Addresses not suitable; defer or queue for fallback hosts (which
3916 might be the continue host) and skip to next address. */
3920 DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n");
3923 if (addr->fallback_hosts != NULL && !fallback)
3927 next->host_list = next->fallback_hosts;
3928 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
3929 if (next->next == NULL) break;
3932 next->next = addr_fallback;
3933 addr_fallback = addr;
3938 while (next->next != NULL) next = next->next;
3939 next->next = addr_defer;
3946 /* Set a flag indicating whether there are further addresses that list
3947 the continued host. This tells the transport to leave the channel open,
3948 but not to pass it to another delivery process. */
3950 for (next = addr_remote; next != NULL; next = next->next)
3953 for (h = next->host_list; h != NULL; h = h->next)
3955 if (Ustrcmp(h->name, continue_hostname) == 0)
3956 { continue_more = TRUE; break; }
3961 /* The transports set up the process info themselves as they may connect
3962 to more than one remote machine. They also have to set up the filter
3963 arguments, if required, so that the host name and address are available
3966 transport_filter_argv = NULL;
3968 /* Create the pipe for inter-process communication. If pipe creation
3969 fails, it is probably because the value of remote_max_parallel is so
3970 large that too many file descriptors for pipes have been created. Arrange
3971 to wait for a process to finish, and then try again. If we still can't
3972 create a pipe when all processes have finished, break the retry loop. */
3976 if (pipe(pfd) == 0) pipe_done = TRUE;
3977 else if (parcount > 0) parmax = parcount;
3980 /* We need to make the reading end of the pipe non-blocking. There are
3981 two different options for this. Exim is cunningly (I hope!) coded so
3982 that it can use either of them, though it prefers O_NONBLOCK, which
3983 distinguishes between EOF and no-more-data. */
3986 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
3988 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
3991 /* If the maximum number of subprocesses already exist, wait for a process
3992 to finish. If we ran out of file descriptors, parmax will have been reduced
3993 from its initial value of remote_max_parallel. */
3995 par_reduce(parmax - 1, fallback);
3998 /* If we failed to create a pipe and there were no processes to wait
3999 for, we have to give up on this one. Do this outside the above loop
4000 so that we can continue the main loop. */
4004 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4005 string_sprintf("unable to create pipe: %s", strerror(errno)), fallback);
4009 /* Find a free slot in the pardata list. Must do this after the possible
4010 waiting for processes to finish, because a terminating process will free
4013 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4014 if (parlist[poffset].pid == 0) break;
4016 /* If there isn't one, there has been a horrible disaster. */
4018 if (poffset >= remote_max_parallel)
4020 (void)close(pfd[pipe_write]);
4021 (void)close(pfd[pipe_read]);
4022 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4023 US"Unexpectedly no free subprocess slot", fallback);
4027 /* Now fork a subprocess to do the remote delivery, but before doing so,
4028 ensure that any cached resourses are released so as not to interfere with
4029 what happens in the subprocess. */
4033 if ((pid = fork()) == 0)
4035 int fd = pfd[pipe_write];
4038 /* Setting this global in the subprocess means we need never clear it */
4039 transport_name = tp->name;
4041 /* There are weird circumstances in which logging is disabled */
4042 disable_logging = tp->disable_logging;
4044 /* Show pids on debug output if parallelism possible */
4046 if (parmax > 1 && (parcount > 0 || addr_remote != NULL))
4048 DEBUG(D_any|D_v) debug_selector |= D_pid;
4049 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
4052 /* Reset the random number generator, so different processes don't all
4053 have the same sequence. In the test harness we want different, but
4054 predictable settings for each delivery process, so do something explicit
4055 here rather they rely on the fixed reset in the random number function. */
4057 random_seed = running_in_test_harness? 42 + 2*delivery_count : 0;
4059 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4060 a new process that may be forked to do another delivery down the same
4063 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4065 /* Close open file descriptors for the pipes of other processes
4066 that are running in parallel. */
4068 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4069 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4071 /* This process has inherited a copy of the file descriptor
4072 for the data file, but its file pointer is shared with all the
4073 other processes running in parallel. Therefore, we have to re-open
4074 the file in order to get a new file descriptor with its own
4075 file pointer. We don't need to lock it, as the lock is held by
4076 the parent process. There doesn't seem to be any way of doing
4077 a dup-with-new-file-pointer. */
4079 (void)close(deliver_datafile);
4080 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir,
4082 deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0);
4084 if (deliver_datafile < 0)
4085 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4086 "parallel delivery: %s", spoolname, strerror(errno));
4088 /* Set the close-on-exec flag */
4090 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4093 /* Set the uid/gid of this process; bombs out on failure. */
4095 exim_setugid(uid, gid, use_initgroups,
4096 string_sprintf("remote delivery to %s with transport=%s",
4097 addr->address, tp->name));
4099 /* Close the unwanted half of this process' pipe, set the process state,
4100 and run the transport. Afterwards, transport_count will contain the number
4101 of bytes written. */
4103 (void)close(pfd[pipe_read]);
4104 set_process_info("delivering %s using %s", message_id, tp->name);
4105 debug_print_string(tp->debug_string);
4106 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4108 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4109 message_id, tp->name, addr->address, (addr->next == NULL)? "" : ", ...");
4111 /* Ensure any cached resources that we used are now released */
4115 /* Pass the result back down the pipe. This is a lot more information
4116 than is needed for a local delivery. We have to send back the error
4117 status for each address, the usability status for each host that is
4118 flagged as unusable, and all the retry items. When TLS is in use, we
4119 send also the cipher and peerdn information. Each type of information
4120 is flagged by an identifying byte, and is then in a fixed format (with
4121 strings terminated by zeros), and there is a final terminator at the
4122 end. The host information and retry information is all attached to
4123 the first address, so that gets sent at the start. */
4125 /* Host unusability information: for most success cases this will
4128 for (h = addr->host_list; h != NULL; h = h->next)
4130 if (h->address == NULL || h->status < hstatus_unusable) continue;
4131 sprintf(CS big_buffer, "H%c%c%s", h->status, h->why, h->address);
4132 rmt_dlv_checked_write(fd, big_buffer, Ustrlen(big_buffer+3) + 4);
4135 /* The number of bytes written. This is the same for each address. Even
4136 if we sent several copies of the message down the same connection, the
4137 size of each one is the same, and it's that value we have got because
4138 transport_count gets reset before calling transport_write_message(). */
4140 big_buffer[0] = 'S';
4141 memcpy(big_buffer+1, &transport_count, sizeof(transport_count));
4142 rmt_dlv_checked_write(fd, big_buffer, sizeof(transport_count) + 1);
4144 /* Information about what happened to each address. Four item types are
4145 used: an optional 'X' item first, for TLS information, then an optional "C"
4146 item for any client-auth info followed by 'R' items for any retry settings,
4147 and finally an 'A' item for the remaining data. */
4149 for(; addr != NULL; addr = addr->next)
4154 /* The certificate verification status goes into the flags */
4155 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4157 /* Use an X item only if there's something to send */
4162 sprintf(CS ptr, "X1%.128s", addr->cipher);
4168 sprintf(CS ptr, "%.512s", addr->peerdn);
4172 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4177 *ptr++ = 'X'; *ptr++ = '2';
4178 if (!tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4182 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4187 *ptr++ = 'X'; *ptr++ = '3';
4188 if (!tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4192 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4194 # ifndef DISABLE_OCSP
4195 if (addr->ocsp > OCSP_NOT_REQ)
4198 sprintf(CS ptr, "X4%c", addr->ocsp + '0');
4200 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4203 #endif /*SUPPORT_TLS*/
4205 if (client_authenticator)
4208 sprintf(CS big_buffer, "C1%.64s", client_authenticator);
4210 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4212 if (client_authenticated_id)
4215 sprintf(CS big_buffer, "C2%.64s", client_authenticated_id);
4217 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4219 if (client_authenticated_sender)
4222 sprintf(CS big_buffer, "C3%.64s", client_authenticated_sender);
4224 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4227 #ifndef DISABLE_PRDR
4228 if (addr->flags & af_prdr_used)
4229 rmt_dlv_checked_write(fd, "P", 1);
4232 #ifdef EXPERIMENTAL_DSN
4233 big_buffer[0] = 'D';
4234 memcpy(big_buffer+1, &addr->dsn_aware, sizeof(addr->dsn_aware));
4235 rmt_dlv_checked_write(fd, big_buffer, sizeof(addr->dsn_aware) + 1);
4236 DEBUG(D_deliver) debug_printf("DSN write: addr->dsn_aware = %d\n", addr->dsn_aware);
4239 /* Retry information: for most success cases this will be null. */
4241 for (r = addr->retries; r != NULL; r = r->next)
4244 sprintf(CS big_buffer, "R%c%.500s", r->flags, r->key);
4245 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4246 memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno));
4247 ptr += sizeof(r->basic_errno);
4248 memcpy(ptr, &(r->more_errno), sizeof(r->more_errno));
4249 ptr += sizeof(r->more_errno);
4250 if (r->message == NULL) *ptr++ = 0; else
4252 sprintf(CS ptr, "%.512s", r->message);
4255 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4258 /* The rest of the information goes in an 'A' item. */
4260 ptr = big_buffer + 3;
4261 sprintf(CS big_buffer, "A%c%c", addr->transport_return,
4262 addr->special_action);
4263 memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno));
4264 ptr += sizeof(addr->basic_errno);
4265 memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno));
4266 ptr += sizeof(addr->more_errno);
4267 memcpy(ptr, &(addr->flags), sizeof(addr->flags));
4268 ptr += sizeof(addr->flags);
4270 if (addr->message == NULL) *ptr++ = 0; else
4272 sprintf(CS ptr, "%.1024s", addr->message);
4276 if (addr->user_message == NULL) *ptr++ = 0; else
4278 sprintf(CS ptr, "%.1024s", addr->user_message);
4282 if (addr->host_used == NULL) *ptr++ = 0; else
4284 sprintf(CS ptr, "%.256s", addr->host_used->name);
4286 sprintf(CS ptr, "%.64s", addr->host_used->address);
4288 memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port));
4289 ptr += sizeof(addr->host_used->port);
4291 /* DNS lookup status */
4292 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4293 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4296 rmt_dlv_checked_write(fd, big_buffer, ptr - big_buffer);
4299 /* Add termination flag, close the pipe, and that's it. The character
4300 after 'Z' indicates whether continue_transport is now NULL or not.
4301 A change from non-NULL to NULL indicates a problem with a continuing
4304 big_buffer[0] = 'Z';
4305 big_buffer[1] = (continue_transport == NULL)? '0' : '1';
4306 rmt_dlv_checked_write(fd, big_buffer, 2);
4311 /* Back in the mainline: close the unwanted half of the pipe. */
4313 (void)close(pfd[pipe_write]);
4315 /* Fork failed; defer with error message */
4319 (void)close(pfd[pipe_read]);
4320 remote_post_process(addr, LOG_MAIN|LOG_PANIC,
4321 string_sprintf("fork failed for remote delivery to %s: %s",
4322 addr->domain, strerror(errno)), fallback);
4326 /* Fork succeeded; increment the count, and remember relevant data for
4327 when the process finishes. */
4330 parlist[poffset].addrlist = parlist[poffset].addr = addr;
4331 parlist[poffset].pid = pid;
4332 parlist[poffset].fd = pfd[pipe_read];
4333 parlist[poffset].done = FALSE;
4334 parlist[poffset].msg = NULL;
4335 parlist[poffset].return_path = return_path;
4337 /* If the process we've just started is sending a message down an existing
4338 channel, wait for it now. This ensures that only one such process runs at
4339 once, whatever the value of remote_max parallel. Otherwise, we might try to
4340 send two or more messages simultaneously down the same channel. This could
4341 happen if there are different domains that include the same host in otherwise
4342 different host lists.
4344 Also, if the transport closes down the channel, this information gets back
4345 (continue_transport gets set to NULL) before we consider any other addresses
4348 if (continue_transport != NULL) par_reduce(0, fallback);
4350 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4351 newly created process get going before we create another process. This should
4352 ensure repeatability in the tests. We only need to wait a tad. */
4354 else if (running_in_test_harness) millisleep(500);
4357 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4358 are still running and post-process their addresses. */
4360 par_reduce(0, fallback);
4367 /*************************************************
4368 * Split an address into local part and domain *
4369 *************************************************/
4371 /* This function initializes an address for routing by splitting it up into a
4372 local part and a domain. The local part is set up twice - once in its original
4373 casing, and once in lower case, and it is dequoted. We also do the "percent
4374 hack" for configured domains. This may lead to a DEFER result if a lookup
4375 defers. When a percent-hacking takes place, we insert a copy of the original
4376 address as a new parent of this address, as if we have had a redirection.
4379 addr points to an addr_item block containing the address
4382 DEFER - could not determine if domain is %-hackable
4386 deliver_split_address(address_item *addr)
4388 uschar *address = addr->address;
4389 uschar *domain = Ustrrchr(address, '@');
4391 int len = domain - address;
4393 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
4395 /* The implication in the RFCs (though I can't say I've seen it spelled out
4396 explicitly) is that quoting should be removed from local parts at the point
4397 where they are locally interpreted. [The new draft "821" is more explicit on
4398 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4399 removing quoting backslashes and any unquoted doublequotes. */
4401 t = addr->cc_local_part = store_get(len+1);
4404 register int c = *address++;
4405 if (c == '\"') continue;
4415 /* We do the percent hack only for those domains that are listed in
4416 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4418 if (percent_hack_domains != NULL)
4421 uschar *new_address = NULL;
4422 uschar *local_part = addr->cc_local_part;
4424 deliver_domain = addr->domain; /* set $domain */
4426 while ((rc = match_isinlist(deliver_domain, &percent_hack_domains, 0,
4427 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
4429 (t = Ustrrchr(local_part, '%')) != NULL)
4431 new_address = string_copy(local_part);
4432 new_address[t - local_part] = '@';
4433 deliver_domain = string_copylc(t+1);
4434 local_part = string_copyn(local_part, t - local_part);
4437 if (rc == DEFER) return DEFER; /* lookup deferred */
4439 /* If hackery happened, set up new parent and alter the current address. */
4441 if (new_address != NULL)
4443 address_item *new_parent = store_get(sizeof(address_item));
4444 *new_parent = *addr;
4445 addr->parent = new_parent;
4446 addr->address = new_address;
4447 addr->unique = string_copy(new_address);
4448 addr->domain = deliver_domain;
4449 addr->cc_local_part = local_part;
4450 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
4455 /* Create the lowercased version of the final local part, and make that the
4456 default one to be used. */
4458 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
4465 /*************************************************
4466 * Get next error message text *
4467 *************************************************/
4469 /* If f is not NULL, read the next "paragraph", from a customized error message
4470 text file, terminated by a line containing ****, and expand it.
4473 f NULL or a file to read from
4474 which string indicating which string (for errors)
4476 Returns: NULL or an expanded string
4480 next_emf(FILE *f, uschar *which)
4484 uschar *para, *yield;
4487 if (f == NULL) return NULL;
4489 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4490 Ustrcmp(buffer, "****\n") == 0) return NULL;
4492 para = store_get(size);
4495 para = string_cat(para, &size, &ptr, buffer, Ustrlen(buffer));
4496 if (Ufgets(buffer, sizeof(buffer), f) == NULL ||
4497 Ustrcmp(buffer, "****\n") == 0) break;
4501 yield = expand_string(para);
4502 if (yield != NULL) return yield;
4504 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
4505 "bounce_message_file or warn_message_file (%s): %s", which,
4506 expand_string_message);
4513 /*************************************************
4514 * Close down a passed transport channel *
4515 *************************************************/
4517 /* This function is called when a passed transport channel cannot be used.
4518 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
4519 so that the function call can be the argument of a "return" statement.
4522 Returns: DELIVER_NOT_ATTEMPTED
4526 continue_closedown(void)
4528 if (continue_transport != NULL)
4530 transport_instance *t;
4531 for (t = transports; t != NULL; t = t->next)
4533 if (Ustrcmp(t->name, continue_transport) == 0)
4535 if (t->info->closedown != NULL) (t->info->closedown)(t);
4540 return DELIVER_NOT_ATTEMPTED;
4546 /*************************************************
4547 * Print address information *
4548 *************************************************/
4550 /* This function is called to output an address, or information about an
4551 address, for bounce or defer messages. If the hide_child flag is set, all we
4552 output is the original ancestor address.
4555 addr points to the address
4556 f the FILE to print to
4557 si an initial string
4558 sc a continuation string for before "generated"
4561 Returns: TRUE if the address is not hidden
4565 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
4569 uschar *printed = US"";
4570 address_item *ancestor = addr;
4571 while (ancestor->parent != NULL) ancestor = ancestor->parent;
4573 fprintf(f, "%s", CS si);
4575 if (addr->parent != NULL && testflag(addr, af_hide_child))
4577 printed = US"an undisclosed address";
4580 else if (!testflag(addr, af_pfr) || addr->parent == NULL)
4581 printed = addr->address;
4585 uschar *s = addr->address;
4588 if (addr->address[0] == '>') { ss = US"mail"; s++; }
4589 else if (addr->address[0] == '|') ss = US"pipe";
4592 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
4593 printed = addr->parent->address;
4596 fprintf(f, "%s", CS string_printing(printed));
4598 if (ancestor != addr)
4600 uschar *original = (ancestor->onetime_parent == NULL)?
4601 ancestor->address : ancestor->onetime_parent;
4602 if (strcmpic(original, printed) != 0)
4603 fprintf(f, "%s(%sgenerated from %s)", sc,
4604 (ancestor != addr->parent)? "ultimately " : "",
4605 string_printing(original));
4608 fprintf(f, "%s", CS se);
4616 /*************************************************
4617 * Print error for an address *
4618 *************************************************/
4620 /* This function is called to print the error information out of an address for
4621 a bounce or a warning message. It tries to format the message reasonably by
4622 introducing newlines. All lines are indented by 4; the initial printing
4623 position must be set before calling.
4625 This function used always to print the error. Nowadays we want to restrict it
4626 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
4627 and filter "fail". We no longer pass other information willy-nilly in bounce
4628 and warning messages. Text in user_message is always output; text in message
4629 only if the af_pass_message flag is set.
4633 f the FILE to print on
4640 print_address_error(address_item *addr, FILE *f, uschar *t)
4642 int count = Ustrlen(t);
4643 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
4647 if (addr->user_message != NULL) s = addr->user_message; else return;
4650 fprintf(f, "\n %s", t);
4654 if (*s == '\\' && s[1] == 'n')
4664 if (*s++ == ':' && isspace(*s) && count > 45)
4666 fprintf(f, "\n "); /* sic (because space follows) */
4678 /*************************************************
4679 * Check list of addresses for duplication *
4680 *************************************************/
4682 /* This function was introduced when the test for duplicate addresses that are
4683 not pipes, files, or autoreplies was moved from the middle of routing to when
4684 routing was complete. That was to fix obscure cases when the routing history
4685 affects the subsequent routing of identical addresses. This function is called
4686 after routing, to check that the final routed addresses are not duplicates.
4688 If we detect a duplicate, we remember what it is a duplicate of. Note that
4689 pipe, file, and autoreply de-duplication is handled during routing, so we must
4690 leave such "addresses" alone here, as otherwise they will incorrectly be
4693 Argument: address of list anchor
4698 do_duplicate_check(address_item **anchor)
4701 while ((addr = *anchor) != NULL)
4704 if (testflag(addr, af_pfr))
4706 anchor = &(addr->next);
4708 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
4710 DEBUG(D_deliver|D_route)
4711 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
4712 *anchor = addr->next;
4713 addr->dupof = tnode->data.ptr;
4714 addr->next = addr_duplicate;
4715 addr_duplicate = addr;
4719 tree_add_duplicate(addr->unique, addr);
4720 anchor = &(addr->next);
4728 /*************************************************
4729 * Deliver one message *
4730 *************************************************/
4732 /* This is the function which is called when a message is to be delivered. It
4733 is passed the id of the message. It is possible that the message no longer
4734 exists, if some other process has delivered it, and it is also possible that
4735 the message is being worked on by another process, in which case the data file
4738 If no delivery is attempted for any of the above reasons, the function returns
4739 DELIVER_NOT_ATTEMPTED.
4741 If the give_up flag is set true, do not attempt any deliveries, but instead
4742 fail all outstanding addresses and return the message to the sender (or
4745 A delivery operation has a process all to itself; we never deliver more than
4746 one message in the same process. Therefore we needn't worry too much about
4750 id the id of the message to be delivered
4751 forced TRUE if delivery was forced by an administrator; this overrides
4752 retry delays and causes a delivery to be tried regardless
4753 give_up TRUE if an administrator has requested that delivery attempts
4756 Returns: When the global variable mua_wrapper is FALSE:
4757 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
4758 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
4759 When the global variable mua_wrapper is TRUE:
4760 DELIVER_MUA_SUCCEEDED if delivery succeeded
4761 DELIVER_MUA_FAILED if delivery failed
4762 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
4766 deliver_message(uschar *id, BOOL forced, BOOL give_up)
4769 int final_yield = DELIVER_ATTEMPTED_NORMAL;
4770 time_t now = time(NULL);
4771 address_item *addr_last = NULL;
4772 uschar *filter_message = NULL;
4774 int process_recipients = RECIP_ACCEPT;
4777 extern int acl_where;
4779 uschar *info = (queue_run_pid == (pid_t)0)?
4780 string_sprintf("delivering %s", id) :
4781 string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
4783 /* If the D_process_info bit is on, set_process_info() will output debugging
4784 information. If not, we want to show this initial information if D_deliver or
4785 D_queue_run is set or in verbose mode. */
4787 set_process_info("%s", info);
4789 if ((debug_selector & D_process_info) == 0 &&
4790 (debug_selector & (D_deliver|D_queue_run|D_v)) != 0)
4791 debug_printf("%s\n", info);
4793 /* Ensure that we catch any subprocesses that are created. Although Exim
4794 sets SIG_DFL as its initial default, some routes through the code end up
4795 here with it set to SIG_IGN - cases where a non-synchronous delivery process
4796 has been forked, but no re-exec has been done. We use sigaction rather than
4797 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
4798 sure it is turned off. (There was a problem on AIX with this.) */
4802 struct sigaction act;
4803 act.sa_handler = SIG_DFL;
4804 sigemptyset(&(act.sa_mask));
4806 sigaction(SIGCHLD, &act, NULL);
4809 signal(SIGCHLD, SIG_DFL);
4812 /* Make the forcing flag available for routers and transports, set up the
4813 global message id field, and initialize the count for returned files and the
4814 message size. This use of strcpy() is OK because the length id is checked when
4815 it is obtained from a command line (the -M or -q options), and otherwise it is
4816 known to be a valid message id. */
4818 Ustrcpy(message_id, id);
4819 deliver_force = forced;
4823 /* Initialize some flags */
4825 update_spool = FALSE;
4826 remove_journal = TRUE;
4828 /* Set a known context for any ACLs we call via expansions */
4829 acl_where = ACL_WHERE_DELIVERY;
4831 /* Reset the random number generator, so that if several delivery processes are
4832 started from a queue runner that has already used random numbers (for sorting),
4833 they don't all get the same sequence. */
4837 /* Open and lock the message's data file. Exim locks on this one because the
4838 header file may get replaced as it is re-written during the delivery process.
4839 Any failures cause messages to be written to the log, except for missing files
4840 while queue running - another process probably completed delivery. As part of
4841 opening the data file, message_subdir gets set. */
4843 if (!spool_open_datafile(id))
4844 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4846 /* The value of message_size at this point has been set to the data length,
4847 plus one for the blank line that notionally precedes the data. */
4849 /* Now read the contents of the header file, which will set up the headers in
4850 store, and also the list of recipients and the tree of non-recipients and
4851 assorted flags. It updates message_size. If there is a reading or format error,
4852 give up; if the message has been around for sufficiently long, remove it. */
4854 sprintf(CS spoolname, "%s-H", id);
4855 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
4857 if (errno == ERRNO_SPOOLFORMAT)
4859 struct stat statbuf;
4860 sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
4862 if (Ustat(big_buffer, &statbuf) == 0)
4863 log_write(0, LOG_MAIN, "Format error in spool file %s: "
4864 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
4865 else log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
4868 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
4871 /* If we managed to read the envelope data, received_time contains the
4872 time the message was received. Otherwise, we can calculate it from the
4875 if (rc != spool_read_hdrerror)
4878 for (i = 0; i < 6; i++)
4879 received_time = received_time * BASE_62 + tab62[id[i] - '0'];
4882 /* If we've had this malformed message too long, sling it. */
4884 if (now - received_time > keep_malformed)
4886 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
4888 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
4890 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
4892 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
4894 log_write(0, LOG_MAIN, "Message removed because older than %s",
4895 readconf_printtime(keep_malformed));
4898 (void)close(deliver_datafile);
4899 deliver_datafile = -1;
4900 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4903 /* The spool header file has been read. Look to see if there is an existing
4904 journal file for this message. If there is, it means that a previous delivery
4905 attempt crashed (program or host) before it could update the spool header file.
4906 Read the list of delivered addresses from the journal and add them to the
4907 nonrecipients tree. Then update the spool file. We can leave the journal in
4908 existence, as it will get further successful deliveries added to it in this
4909 run, and it will be deleted if this function gets to its end successfully.
4910 Otherwise it might be needed again. */
4912 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
4913 jread = Ufopen(spoolname, "rb");
4916 while (Ufgets(big_buffer, big_buffer_size, jread) != NULL)
4918 int n = Ustrlen(big_buffer);
4919 big_buffer[n-1] = 0;
4920 tree_add_nonrecipient(big_buffer);
4921 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
4922 "journal file\n", big_buffer);
4924 (void)fclose(jread);
4925 /* Panic-dies on error */
4926 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
4928 else if (errno != ENOENT)
4930 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
4931 "%s", strerror(errno));
4932 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4935 /* A null recipients list indicates some kind of disaster. */
4937 if (recipients_list == NULL)
4939 (void)close(deliver_datafile);
4940 deliver_datafile = -1;
4941 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", spoolname);
4942 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4946 /* Handle a message that is frozen. There are a number of different things that
4947 can happen, but in the default situation, unless forced, no delivery is
4952 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
4953 /* Moving to another directory removes the message from Exim's view. Other
4954 tools must be used to deal with it. Logging of this action happens in
4955 spool_move_message() and its subfunctions. */
4957 if (move_frozen_messages &&
4958 spool_move_message(id, message_subdir, US"", US"F"))
4959 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4962 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
4963 maximum time to keep messages that are frozen. Thaw if we reach it, with a
4964 flag causing all recipients to be failed. The time is the age of the
4965 message, not the time since freezing. */
4967 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
4969 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
4970 process_recipients = RECIP_FAIL_TIMEOUT;
4973 /* For bounce messages (and others with no sender), thaw if the error message
4974 ignore timer is exceeded. The message will be discarded if this delivery
4977 else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
4979 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
4982 /* If this is a bounce message, or there's no auto thaw, or we haven't
4983 reached the auto thaw time yet, and this delivery is not forced by an admin
4984 user, do not attempt delivery of this message. Note that forced is set for
4985 continuing messages down the same channel, in order to skip load checking and
4986 ignore hold domains, but we don't want unfreezing in that case. */
4990 if ((sender_address[0] == 0 ||
4992 now <= deliver_frozen_at + auto_thaw
4995 (!forced || !deliver_force_thaw || !admin_user ||
4996 continue_hostname != NULL
4999 (void)close(deliver_datafile);
5000 deliver_datafile = -1;
5001 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
5002 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5005 /* If delivery was forced (by an admin user), assume a manual thaw.
5006 Otherwise it's an auto thaw. */
5010 deliver_manual_thaw = TRUE;
5011 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
5013 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
5016 /* We get here if any of the rules for unfreezing have triggered. */
5018 deliver_freeze = FALSE;
5019 update_spool = TRUE;
5023 /* Open the message log file if we are using them. This records details of
5024 deliveries, deferments, and failures for the benefit of the mail administrator.
5025 The log is not used by exim itself to track the progress of a message; that is
5026 done by rewriting the header spool file. */
5033 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
5034 fd = open_msglog_file(spoolname, SPOOL_MODE, &error);
5038 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
5039 spoolname, strerror(errno));
5040 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5043 /* Make a C stream out of it. */
5045 message_log = fdopen(fd, "a");
5046 if (message_log == NULL)
5048 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
5049 spoolname, strerror(errno));
5050 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5055 /* If asked to give up on a message, log who did it, and set the action for all
5060 struct passwd *pw = getpwuid(real_uid);
5061 log_write(0, LOG_MAIN, "cancelled by %s", (pw != NULL)?
5062 US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5063 process_recipients = RECIP_FAIL;
5066 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5068 else if (received_count > received_headers_max)
5069 process_recipients = RECIP_FAIL_LOOP;
5071 /* Otherwise, if a system-wide, address-independent message filter is
5072 specified, run it now, except in the case when we are failing all recipients as
5073 a result of timeout_frozen_after. If the system filter yields "delivered", then
5074 ignore the true recipients of the message. Failure of the filter file is
5075 logged, and the delivery attempt fails. */
5077 else if (system_filter != NULL && process_recipients != RECIP_FAIL_TIMEOUT)
5082 redirect_block redirect;
5084 if (system_filter_uid_set)
5086 ugid.uid = system_filter_uid;
5087 ugid.gid = system_filter_gid;
5088 ugid.uid_set = ugid.gid_set = TRUE;
5092 ugid.uid_set = ugid.gid_set = FALSE;
5095 return_path = sender_address;
5096 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5097 system_filtering = TRUE;
5099 /* Any error in the filter file causes a delivery to be abandoned. */
5101 redirect.string = system_filter;
5102 redirect.isfile = TRUE;
5103 redirect.check_owner = redirect.check_group = FALSE;
5104 redirect.owners = NULL;
5105 redirect.owngroups = NULL;
5107 redirect.modemask = 0;
5109 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5112 &redirect, /* Where the data is */
5113 RDO_DEFER | /* Turn on all the enabling options */
5114 RDO_FAIL | /* Leave off all the disabling options */
5119 NULL, /* No :include: restriction (not used in filter) */
5120 NULL, /* No sieve vacation directory (not sieve!) */
5121 NULL, /* No sieve enotify mailto owner (not sieve!) */
5122 NULL, /* No sieve user address (not sieve!) */
5123 NULL, /* No sieve subaddress (not sieve!) */
5124 &ugid, /* uid/gid data */
5125 &addr_new, /* Where to hang generated addresses */
5126 &filter_message, /* Where to put error message */
5127 NULL, /* Don't skip syntax errors */
5128 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5129 US"system filter"); /* For error messages */
5131 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5133 if (rc == FF_ERROR || rc == FF_NONEXIST)
5135 (void)close(deliver_datafile);
5136 deliver_datafile = -1;
5137 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5138 string_printing(filter_message));
5139 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5142 /* Reset things. If the filter message is an empty string, which can happen
5143 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5145 system_filtering = FALSE;
5146 enable_dollar_recipients = FALSE;
5147 if (filter_message != NULL && filter_message[0] == 0) filter_message = NULL;
5149 /* Save the values of the system filter variables so that user filters
5152 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5154 /* The filter can request that delivery of the original addresses be
5159 process_recipients = RECIP_DEFER;
5160 deliver_msglog("Delivery deferred by system filter\n");
5161 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5164 /* The filter can request that a message be frozen, but this does not
5165 take place if the message has been manually thawed. In that case, we must
5166 unset "delivered", which is forced by the "freeze" command to make -bF
5169 else if (rc == FF_FREEZE && !deliver_manual_thaw)
5171 deliver_freeze = TRUE;
5172 deliver_frozen_at = time(NULL);
5173 process_recipients = RECIP_DEFER;
5174 frozen_info = string_sprintf(" by the system filter%s%s",
5175 (filter_message == NULL)? US"" : US": ",
5176 (filter_message == NULL)? US"" : filter_message);
5179 /* The filter can request that a message be failed. The error message may be
5180 quite long - it is sent back to the sender in the bounce - but we don't want
5181 to fill up the log with repetitions of it. If it starts with << then the text
5182 between << and >> is written to the log, with the rest left for the bounce
5185 else if (rc == FF_FAIL)
5187 uschar *colon = US"";
5188 uschar *logmsg = US"";
5191 process_recipients = RECIP_FAIL_FILTER;
5193 if (filter_message != NULL)
5197 if (filter_message[0] == '<' && filter_message[1] == '<' &&
5198 (logend = Ustrstr(filter_message, ">>")) != NULL)
5200 logmsg = filter_message + 2;
5201 loglen = logend - logmsg;
5202 filter_message = logend + 2;
5203 if (filter_message[0] == 0) filter_message = NULL;
5207 logmsg = filter_message;
5208 loglen = Ustrlen(filter_message);
5212 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
5216 /* Delivery can be restricted only to those recipients (if any) that the
5217 filter specified. */
5219 else if (rc == FF_DELIVERED)
5221 process_recipients = RECIP_IGNORE;
5222 if (addr_new == NULL)
5223 log_write(0, LOG_MAIN, "=> discarded (system filter)");
5225 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
5228 /* If any new addresses were created by the filter, fake up a "parent"
5229 for them. This is necessary for pipes, etc., which are expected to have
5230 parents, and it also gives some sensible logging for others. Allow
5231 pipes, files, and autoreplies, and run them as the filter uid if set,
5232 otherwise as the current uid. */
5234 if (addr_new != NULL)
5236 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
5237 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
5239 /* The text "system-filter" is tested in transport_set_up_command() and in
5240 set_up_shell_command() in the pipe transport, to enable them to permit
5241 $recipients, so don't change it here without also changing it there. */
5243 address_item *p = addr_new;
5244 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
5246 parent->domain = string_copylc(qualify_domain_recipient);
5247 parent->local_part = US"system-filter";
5249 /* As part of this loop, we arrange for addr_last to end up pointing
5250 at the final address. This is used if we go on to add addresses for the
5251 original recipients. */
5255 if (parent->child_count == SHRT_MAX)
5256 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
5257 "than %d delivery addresses", SHRT_MAX);
5258 parent->child_count++;
5261 if (testflag(p, af_pfr))
5267 setflag(p, af_uid_set |
5273 /* Find the name of the system filter's appropriate pfr transport */
5275 if (p->address[0] == '|')
5278 tpname = system_filter_pipe_transport;
5279 address_pipe = p->address;
5281 else if (p->address[0] == '>')
5284 tpname = system_filter_reply_transport;
5288 if (p->address[Ustrlen(p->address)-1] == '/')
5290 type = US"directory";
5291 tpname = system_filter_directory_transport;
5296 tpname = system_filter_file_transport;
5298 address_file = p->address;
5301 /* Now find the actual transport, first expanding the name. We have
5302 set address_file or address_pipe above. */
5306 uschar *tmp = expand_string(tpname);
5307 address_file = address_pipe = NULL;
5309 p->message = string_sprintf("failed to expand \"%s\" as a "
5310 "system filter transport name", tpname);
5315 p->message = string_sprintf("system_filter_%s_transport is unset",
5321 transport_instance *tp;
5322 for (tp = transports; tp != NULL; tp = tp->next)
5324 if (Ustrcmp(tp->name, tpname) == 0)
5331 p->message = string_sprintf("failed to find \"%s\" transport "
5332 "for system filter delivery", tpname);
5335 /* If we couldn't set up a transport, defer the delivery, putting the
5336 error on the panic log as well as the main log. */
5338 if (p->transport == NULL)
5340 address_item *badp = p;
5342 if (addr_last == NULL) addr_new = p; else addr_last->next = p;
5343 badp->local_part = badp->address; /* Needed for log line */
5344 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
5347 } /* End of pfr handling */
5349 /* Either a non-pfr delivery, or we found a transport */
5351 DEBUG(D_deliver|D_filter)
5352 debug_printf("system filter added %s\n", p->address);
5356 } /* Loop through all addr_new addresses */
5361 /* Scan the recipients list, and for every one that is not in the non-
5362 recipients tree, add an addr item to the chain of new addresses. If the pno
5363 value is non-negative, we must set the onetime parent from it. This which
5364 points to the relevant entry in the recipients list.
5366 This processing can be altered by the setting of the process_recipients
5367 variable, which is changed if recipients are to be ignored, failed, or
5368 deferred. This can happen as a result of system filter activity, or if the -Mg
5369 option is used to fail all of them.
5371 Duplicate addresses are handled later by a different tree structure; we can't
5372 just extend the non-recipients tree, because that will be re-written to the
5373 spool if the message is deferred, and in any case there are casing
5374 complications for local addresses. */
5376 if (process_recipients != RECIP_IGNORE)
5378 for (i = 0; i < recipients_count; i++)
5380 if (tree_search(tree_nonrecipients, recipients_list[i].address) == NULL)
5382 recipient_item *r = recipients_list + i;
5383 address_item *new = deliver_make_addr(r->address, FALSE);
5384 new->p.errors_address = r->errors_to;
5387 new->onetime_parent = recipients_list[r->pno].address;
5389 #ifdef EXPERIMENTAL_DSN
5390 /* If DSN support is enabled, set the dsn flags and the original receipt
5391 to be passed on to other DSN enabled MTAs */
5392 new->dsn_flags = r->dsn_flags & rf_dsnflags;
5393 new->dsn_orcpt = r->orcpt;
5394 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: %d\n", new->dsn_orcpt, new->dsn_flags);
5397 switch (process_recipients)
5399 /* RECIP_DEFER is set when a system filter freezes a message. */
5402 new->next = addr_defer;
5407 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
5410 case RECIP_FAIL_FILTER:
5412 (filter_message == NULL)? US"delivery cancelled" : filter_message;
5413 setflag(new, af_pass_message);
5414 goto RECIP_QUEUE_FAILED; /* below */
5417 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
5418 than the value in timeout_frozen_after. Treat non-bounce messages
5419 similarly to -Mg; for bounce messages we just want to discard, so
5420 don't put the address on the failed list. The timeout has already
5423 case RECIP_FAIL_TIMEOUT:
5424 new->message = US"delivery cancelled; message timed out";
5425 goto RECIP_QUEUE_FAILED; /* below */
5428 /* RECIP_FAIL is set when -Mg has been used. */
5431 new->message = US"delivery cancelled by administrator";
5434 /* Common code for the failure cases above. If this is not a bounce
5435 message, put the address on the failed list so that it is used to
5436 create a bounce. Otherwise do nothing - this just discards the address.
5437 The incident has already been logged. */
5440 if (sender_address[0] != 0)
5442 new->next = addr_failed;
5448 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
5449 in the message. Process each address as a routing failure; if this
5450 is a bounce message, it will get frozen. */
5452 case RECIP_FAIL_LOOP:
5453 new->message = US"Too many \"Received\" headers - suspected mail loop";
5454 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5458 /* Value should be RECIP_ACCEPT; take this as the safe default. */
5461 if (addr_new == NULL) addr_new = new; else addr_last->next = new;
5471 address_item *p = addr_new;
5472 debug_printf("Delivery address list:\n");
5475 debug_printf(" %s %s\n", p->address, (p->onetime_parent == NULL)? US"" :
5481 /* Set up the buffers used for copying over the file when delivering. */
5483 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
5484 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
5488 /* Until there are no more new addresses, handle each one as follows:
5490 . If this is a generated address (indicated by the presence of a parent
5491 pointer) then check to see whether it is a pipe, file, or autoreply, and
5492 if so, handle it directly here. The router that produced the address will
5493 have set the allow flags into the address, and also set the uid/gid required.
5494 Having the routers generate new addresses and then checking them here at
5495 the outer level is tidier than making each router do the checking, and
5496 means that routers don't need access to the failed address queue.
5498 . Break up the address into local part and domain, and make lowercased
5499 versions of these strings. We also make unquoted versions of the local part.
5501 . Handle the percent hack for those domains for which it is valid.
5503 . For child addresses, determine if any of the parents have the same address.
5504 If so, generate a different string for previous delivery checking. Without
5505 this code, if the address spqr generates spqr via a forward or alias file,
5506 delivery of the generated spqr stops further attempts at the top level spqr,
5507 which is not what is wanted - it may have generated other addresses.
5509 . Check on the retry database to see if routing was previously deferred, but
5510 only if in a queue run. Addresses that are to be routed are put on the
5511 addr_route chain. Addresses that are to be deferred are put on the
5512 addr_defer chain. We do all the checking first, so as not to keep the
5513 retry database open any longer than necessary.
5515 . Now we run the addresses through the routers. A router may put the address
5516 on either the addr_local or the addr_remote chain for local or remote
5517 delivery, respectively, or put it on the addr_failed chain if it is
5518 undeliveable, or it may generate child addresses and put them on the
5519 addr_new chain, or it may defer an address. All the chain anchors are
5520 passed as arguments so that the routers can be called for verification
5523 . If new addresses have been generated by the routers, da capo.
5526 header_rewritten = FALSE; /* No headers rewritten yet */
5527 while (addr_new != NULL) /* Loop until all addresses dealt with */
5529 address_item *addr, *parent;
5530 dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE);
5532 /* Failure to open the retry database is treated the same as if it does
5533 not exist. In both cases, dbm_file is NULL. */
5535 if (dbm_file == NULL)
5537 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
5538 debug_printf("no retry data available\n");
5541 /* Scan the current batch of new addresses, to handle pipes, files and
5542 autoreplies, and determine which others are ready for routing. */
5544 while (addr_new != NULL)
5549 dbdata_retry *domain_retry_record;
5550 dbdata_retry *address_retry_record;
5553 addr_new = addr->next;
5555 DEBUG(D_deliver|D_retry|D_route)
5557 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5558 debug_printf("Considering: %s\n", addr->address);
5561 /* Handle generated address that is a pipe or a file or an autoreply. */
5563 if (testflag(addr, af_pfr))
5565 /* If an autoreply in a filter could not generate a syntactically valid
5566 address, give up forthwith. Set af_ignore_error so that we don't try to
5567 generate a bounce. */
5569 if (testflag(addr, af_bad_reply))
5571 addr->basic_errno = ERRNO_BADADDRESS2;
5572 addr->local_part = addr->address;
5574 US"filter autoreply generated syntactically invalid recipient";
5575 setflag(addr, af_ignore_error);
5576 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5577 continue; /* with the next new address */
5580 /* If two different users specify delivery to the same pipe or file or
5581 autoreply, there should be two different deliveries, so build a unique
5582 string that incorporates the original address, and use this for
5583 duplicate testing and recording delivery, and also for retrying. */
5586 string_sprintf("%s:%s", addr->address, addr->parent->unique +
5587 (testflag(addr->parent, af_homonym)? 3:0));
5589 addr->address_retry_key = addr->domain_retry_key =
5590 string_sprintf("T:%s", addr->unique);
5592 /* If a filter file specifies two deliveries to the same pipe or file,
5593 we want to de-duplicate, but this is probably not wanted for two mail
5594 commands to the same address, where probably both should be delivered.
5595 So, we have to invent a different unique string in that case. Just
5596 keep piling '>' characters on the front. */
5598 if (addr->address[0] == '>')
5600 while (tree_search(tree_duplicates, addr->unique) != NULL)
5601 addr->unique = string_sprintf(">%s", addr->unique);
5604 else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL)
5606 DEBUG(D_deliver|D_route)
5607 debug_printf("%s is a duplicate address: discarded\n", addr->address);
5608 addr->dupof = tnode->data.ptr;
5609 addr->next = addr_duplicate;
5610 addr_duplicate = addr;
5614 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5616 /* Check for previous delivery */
5618 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5620 DEBUG(D_deliver|D_route)
5621 debug_printf("%s was previously delivered: discarded\n", addr->address);
5622 child_done(addr, tod_stamp(tod_log));
5626 /* Save for checking future duplicates */
5628 tree_add_duplicate(addr->unique, addr);
5630 /* Set local part and domain */
5632 addr->local_part = addr->address;
5633 addr->domain = addr->parent->domain;
5635 /* Ensure that the delivery is permitted. */
5637 if (testflag(addr, af_file))
5639 if (!testflag(addr, af_allow_file))
5641 addr->basic_errno = ERRNO_FORBIDFILE;
5642 addr->message = US"delivery to file forbidden";
5643 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5644 continue; /* with the next new address */
5647 else if (addr->address[0] == '|')
5649 if (!testflag(addr, af_allow_pipe))
5651 addr->basic_errno = ERRNO_FORBIDPIPE;
5652 addr->message = US"delivery to pipe forbidden";
5653 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5654 continue; /* with the next new address */
5657 else if (!testflag(addr, af_allow_reply))
5659 addr->basic_errno = ERRNO_FORBIDREPLY;
5660 addr->message = US"autoreply forbidden";
5661 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5662 continue; /* with the next new address */
5665 /* If the errno field is already set to BADTRANSPORT, it indicates
5666 failure to expand a transport string, or find the associated transport,
5667 or an unset transport when one is required. Leave this test till now so
5668 that the forbid errors are given in preference. */
5670 if (addr->basic_errno == ERRNO_BADTRANSPORT)
5672 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5676 /* Treat /dev/null as a special case and abandon the delivery. This
5677 avoids having to specify a uid on the transport just for this case.
5678 Arrange for the transport name to be logged as "**bypassed**". */
5680 if (Ustrcmp(addr->address, "/dev/null") == 0)
5682 uschar *save = addr->transport->name;
5683 addr->transport->name = US"**bypassed**";
5684 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
5685 addr->transport->name = save;
5686 continue; /* with the next new address */
5689 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
5692 DEBUG(D_deliver|D_route)
5693 debug_printf("queued for %s transport\n", addr->transport->name);
5694 addr->next = addr_local;
5696 continue; /* with the next new address */
5699 /* Handle normal addresses. First, split up into local part and domain,
5700 handling the %-hack if necessary. There is the possibility of a defer from
5701 a lookup in percent_hack_domains. */
5703 if ((rc = deliver_split_address(addr)) == DEFER)
5705 addr->message = US"cannot check percent_hack_domains";
5706 addr->basic_errno = ERRNO_LISTDEFER;
5707 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
5711 /* Check to see if the domain is held. If so, proceed only if the
5712 delivery was forced by hand. */
5714 deliver_domain = addr->domain; /* set $domain */
5715 if (!forced && hold_domains != NULL &&
5716 (rc = match_isinlist(addr->domain, &hold_domains, 0,
5717 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
5722 addr->message = US"hold_domains lookup deferred";
5723 addr->basic_errno = ERRNO_LISTDEFER;
5727 addr->message = US"domain is held";
5728 addr->basic_errno = ERRNO_HELD;
5730 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
5734 /* Now we can check for duplicates and previously delivered addresses. In
5735 order to do this, we have to generate a "unique" value for each address,
5736 because there may be identical actual addresses in a line of descendents.
5737 The "unique" field is initialized to the same value as the "address" field,
5738 but gets changed here to cope with identically-named descendents. */
5740 for (parent = addr->parent; parent != NULL; parent = parent->parent)
5741 if (strcmpic(addr->address, parent->address) == 0) break;
5743 /* If there's an ancestor with the same name, set the homonym flag. This
5744 influences how deliveries are recorded. Then add a prefix on the front of
5745 the unique address. We use \n\ where n starts at 0 and increases each time.
5746 It is unlikely to pass 9, but if it does, it may look odd but will still
5747 work. This means that siblings or cousins with the same names are treated
5748 as duplicates, which is what we want. */
5752 setflag(addr, af_homonym);
5753 if (parent->unique[0] != '\\')
5754 addr->unique = string_sprintf("\\0\\%s", addr->address);
5756 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
5760 /* Ensure that the domain in the unique field is lower cased, because
5761 domains are always handled caselessly. */
5763 p = Ustrrchr(addr->unique, '@');
5764 while (*p != 0) { *p = tolower(*p); p++; }
5766 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
5768 if (tree_search(tree_nonrecipients, addr->unique) != NULL)
5770 DEBUG(D_deliver|D_route)
5771 debug_printf("%s was previously delivered: discarded\n", addr->unique);
5772 child_done(addr, tod_stamp(tod_log));
5776 /* Get the routing retry status, saving the two retry keys (with and
5777 without the local part) for subsequent use. If there is no retry record for
5778 the standard address routing retry key, we look for the same key with the
5779 sender attached, because this form is used by the smtp transport after a
5780 4xx response to RCPT when address_retry_include_sender is true. */
5782 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
5783 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
5786 if (dbm_file == NULL)
5787 domain_retry_record = address_retry_record = NULL;
5790 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
5791 if (domain_retry_record != NULL &&
5792 now - domain_retry_record->time_stamp > retry_data_expire)
5793 domain_retry_record = NULL; /* Ignore if too old */
5795 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
5796 if (address_retry_record != NULL &&
5797 now - address_retry_record->time_stamp > retry_data_expire)
5798 address_retry_record = NULL; /* Ignore if too old */
5800 if (address_retry_record == NULL)
5802 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
5804 address_retry_record = dbfn_read(dbm_file, altkey);
5805 if (address_retry_record != NULL &&
5806 now - address_retry_record->time_stamp > retry_data_expire)
5807 address_retry_record = NULL; /* Ignore if too old */
5811 DEBUG(D_deliver|D_retry)
5813 if (domain_retry_record == NULL)
5814 debug_printf("no domain retry record\n");
5815 if (address_retry_record == NULL)
5816 debug_printf("no address retry record\n");
5819 /* If we are sending a message down an existing SMTP connection, we must
5820 assume that the message which created the connection managed to route
5821 an address to that connection. We do not want to run the risk of taking
5822 a long time over routing here, because if we do, the server at the other
5823 end of the connection may time it out. This is especially true for messages
5824 with lots of addresses. For this kind of delivery, queue_running is not
5825 set, so we would normally route all addresses. We take a pragmatic approach
5826 and defer routing any addresses that have any kind of domain retry record.
5827 That is, we don't even look at their retry times. It doesn't matter if this
5828 doesn't work occasionally. This is all just an optimization, after all.
5830 The reason for not doing the same for address retries is that they normally
5831 arise from 4xx responses, not DNS timeouts. */
5833 if (continue_hostname != NULL && domain_retry_record != NULL)
5835 addr->message = US"reusing SMTP connection skips previous routing defer";
5836 addr->basic_errno = ERRNO_RRETRY;
5837 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5840 /* If we are in a queue run, defer routing unless there is no retry data or
5841 we've passed the next retry time, or this message is forced. In other
5842 words, ignore retry data when not in a queue run.
5844 However, if the domain retry time has expired, always allow the routing
5845 attempt. If it fails again, the address will be failed. This ensures that
5846 each address is routed at least once, even after long-term routing
5849 If there is an address retry, check that too; just wait for the next
5850 retry time. This helps with the case when the temporary error on the
5851 address was really message-specific rather than address specific, since
5852 it allows other messages through.
5854 We also wait for the next retry time if this is a message sent down an
5855 existing SMTP connection (even though that will be forced). Otherwise there
5856 will be far too many attempts for an address that gets a 4xx error. In
5857 fact, after such an error, we should not get here because, the host should
5858 not be remembered as one this message needs. However, there was a bug that
5859 used to cause this to happen, so it is best to be on the safe side.
5861 Even if we haven't reached the retry time in the hints, there is one more
5862 check to do, which is for the ultimate address timeout. We only do this
5863 check if there is an address retry record and there is not a domain retry
5864 record; this implies that previous attempts to handle the address had the
5865 retry_use_local_parts option turned on. We use this as an approximation
5866 for the destination being like a local delivery, for example delivery over
5867 LMTP to an IMAP message store. In this situation users are liable to bump
5868 into their quota and thereby have intermittently successful deliveries,
5869 which keep the retry record fresh, which can lead to us perpetually
5870 deferring messages. */
5872 else if (((queue_running && !deliver_force) || continue_hostname != NULL)
5874 ((domain_retry_record != NULL &&
5875 now < domain_retry_record->next_try &&
5876 !domain_retry_record->expired)
5878 (address_retry_record != NULL &&
5879 now < address_retry_record->next_try))
5881 (domain_retry_record != NULL ||
5882 address_retry_record == NULL ||
5883 !retry_ultimate_address_timeout(addr->address_retry_key,
5884 addr->domain, address_retry_record, now)))
5886 addr->message = US"retry time not reached";
5887 addr->basic_errno = ERRNO_RRETRY;
5888 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5891 /* The domain is OK for routing. Remember if retry data exists so it
5892 can be cleaned up after a successful delivery. */
5896 if (domain_retry_record != NULL || address_retry_record != NULL)
5897 setflag(addr, af_dr_retry_exists);
5898 addr->next = addr_route;
5900 DEBUG(D_deliver|D_route)
5901 debug_printf("%s: queued for routing\n", addr->address);
5905 /* The database is closed while routing is actually happening. Requests to
5906 update it are put on a chain and all processed together at the end. */
5908 if (dbm_file != NULL) dbfn_close(dbm_file);
5910 /* If queue_domains is set, we don't even want to try routing addresses in
5911 those domains. During queue runs, queue_domains is forced to be unset.
5912 Optimize by skipping this pass through the addresses if nothing is set. */
5914 if (!deliver_force && queue_domains != NULL)
5916 address_item *okaddr = NULL;
5917 while (addr_route != NULL)
5919 address_item *addr = addr_route;
5920 addr_route = addr->next;
5922 deliver_domain = addr->domain; /* set $domain */
5923 if ((rc = match_isinlist(addr->domain, &queue_domains, 0,
5924 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
5929 addr->basic_errno = ERRNO_LISTDEFER;
5930 addr->message = US"queue_domains lookup deferred";
5931 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5935 addr->next = okaddr;
5941 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
5942 addr->message = US"domain is in queue_domains";
5943 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
5947 addr_route = okaddr;
5950 /* Now route those addresses that are not deferred. */
5952 while (addr_route != NULL)
5955 address_item *addr = addr_route;
5956 uschar *old_domain = addr->domain;
5957 uschar *old_unique = addr->unique;
5958 addr_route = addr->next;
5961 /* Just in case some router parameter refers to it. */
5963 return_path = (addr->p.errors_address != NULL)?
5964 addr->p.errors_address : sender_address;
5966 /* If a router defers an address, add a retry item. Whether or not to
5967 use the local part in the key is a property of the router. */
5969 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
5970 &addr_succeed, v_none)) == DEFER)
5971 retry_add_item(addr, (addr->router->retry_use_local_part)?
5972 string_sprintf("R:%s@%s", addr->local_part, addr->domain) :
5973 string_sprintf("R:%s", addr->domain), 0);
5975 /* Otherwise, if there is an existing retry record in the database, add
5976 retry items to delete both forms. We must also allow for the possibility
5977 of a routing retry that includes the sender address. Since the domain might
5978 have been rewritten (expanded to fully qualified) as a result of routing,
5979 ensure that the rewritten form is also deleted. */
5981 else if (testflag(addr, af_dr_retry_exists))
5983 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
5985 retry_add_item(addr, altkey, rf_delete);
5986 retry_add_item(addr, addr->address_retry_key, rf_delete);
5987 retry_add_item(addr, addr->domain_retry_key, rf_delete);
5988 if (Ustrcmp(addr->domain, old_domain) != 0)
5989 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
5992 /* DISCARD is given for :blackhole: and "seen finish". The event has been
5993 logged, but we need to ensure the address (and maybe parents) is marked
5998 address_done(addr, tod_stamp(tod_log));
5999 continue; /* route next address */
6002 /* The address is finished with (failed or deferred). */
6006 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
6007 continue; /* route next address */
6010 /* The address has been routed. If the router changed the domain, it will
6011 also have changed the unique address. We have to test whether this address
6012 has already been delivered, because it's the unique address that finally
6015 if (addr->unique != old_unique &&
6016 tree_search(tree_nonrecipients, addr->unique) != 0)
6018 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
6019 "discarded\n", addr->address);
6020 if (addr_remote == addr) addr_remote = addr->next;
6021 else if (addr_local == addr) addr_local = addr->next;
6024 /* If the router has same_domain_copy_routing set, we are permitted to copy
6025 the routing for any other addresses with the same domain. This is an
6026 optimisation to save repeated DNS lookups for "standard" remote domain
6027 routing. The option is settable only on routers that generate host lists.
6028 We play it very safe, and do the optimization only if the address is routed
6029 to a remote transport, there are no header changes, and the domain was not
6030 modified by the router. */
6032 if (addr_remote == addr &&
6033 addr->router->same_domain_copy_routing &&
6034 addr->p.extra_headers == NULL &&
6035 addr->p.remove_headers == NULL &&
6036 old_domain == addr->domain)
6038 address_item **chain = &addr_route;
6039 while (*chain != NULL)
6041 address_item *addr2 = *chain;
6042 if (Ustrcmp(addr2->domain, addr->domain) != 0)
6044 chain = &(addr2->next);
6048 /* Found a suitable address; take it off the routing list and add it to
6049 the remote delivery list. */
6051 *chain = addr2->next;
6052 addr2->next = addr_remote;
6053 addr_remote = addr2;
6055 /* Copy the routing data */
6057 addr2->domain = addr->domain;
6058 addr2->router = addr->router;
6059 addr2->transport = addr->transport;
6060 addr2->host_list = addr->host_list;
6061 addr2->fallback_hosts = addr->fallback_hosts;
6062 addr2->p.errors_address = addr->p.errors_address;
6063 copyflag(addr2, addr, af_hide_child | af_local_host_removed);
6065 DEBUG(D_deliver|D_route)
6067 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6069 "Routing for %s copied from %s\n",
6070 addr2->address, addr2->address, addr->address);
6074 } /* Continue with routing the next address. */
6075 } /* Loop to process any child addresses that the routers created, and
6076 any rerouted addresses that got put back on the new chain. */
6079 /* Debugging: show the results of the routing */
6081 DEBUG(D_deliver|D_retry|D_route)
6083 address_item *p = addr_local;
6084 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6085 debug_printf("After routing:\n Local deliveries:\n");
6088 debug_printf(" %s\n", p->address);
6093 debug_printf(" Remote deliveries:\n");
6096 debug_printf(" %s\n", p->address);
6101 debug_printf(" Failed addresses:\n");
6104 debug_printf(" %s\n", p->address);
6109 debug_printf(" Deferred addresses:\n");
6112 debug_printf(" %s\n", p->address);
6117 /* Free any resources that were cached during routing. */
6122 /* These two variables are set only during routing, after check_local_user.
6123 Ensure they are not set in transports. */
6125 local_user_gid = (gid_t)(-1);
6126 local_user_uid = (uid_t)(-1);
6128 /* Check for any duplicate addresses. This check is delayed until after
6129 routing, because the flexibility of the routing configuration means that
6130 identical addresses with different parentage may end up being redirected to
6131 different addresses. Checking for duplicates too early (as we previously used
6132 to) makes this kind of thing not work. */
6134 do_duplicate_check(&addr_local);
6135 do_duplicate_check(&addr_remote);
6137 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
6138 remote transport. The check that they all end up in one transaction happens in
6139 the do_remote_deliveries() function. */
6141 if (mua_wrapper && (addr_local != NULL || addr_failed != NULL ||
6142 addr_defer != NULL))
6145 uschar *which, *colon, *msg;
6147 if (addr_local != NULL)
6152 else if (addr_defer != NULL)
6155 which = US"deferred";
6163 while (addr->parent != NULL) addr = addr->parent;
6165 if (addr->message != NULL)
6168 msg = addr->message;
6170 else colon = msg = US"";
6172 /* We don't need to log here for a forced failure as it will already
6173 have been logged. Defer will also have been logged, but as a defer, so we do
6174 need to do the failure logging. */
6176 if (addr != addr_failed)
6177 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
6178 addr->address, which);
6180 /* Always write an error to the caller */
6182 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
6185 final_yield = DELIVER_MUA_FAILED;
6186 addr_failed = addr_defer = NULL; /* So that we remove the message */
6187 goto DELIVERY_TIDYUP;
6191 /* If this is a run to continue deliveries to an external channel that is
6192 already set up, defer any local deliveries. */
6194 if (continue_transport != NULL)
6196 if (addr_defer == NULL) addr_defer = addr_local; else
6198 address_item *addr = addr_defer;
6199 while (addr->next != NULL) addr = addr->next;
6200 addr->next = addr_local;
6206 /* Because address rewriting can happen in the routers, we should not really do
6207 ANY deliveries until all addresses have been routed, so that all recipients of
6208 the message get the same headers. However, this is in practice not always
6209 possible, since sometimes remote addresses give DNS timeouts for days on end.
6210 The pragmatic approach is to deliver what we can now, saving any rewritten
6211 headers so that at least the next lot of recipients benefit from the rewriting
6212 that has already been done.
6214 If any headers have been rewritten during routing, update the spool file to
6215 remember them for all subsequent deliveries. This can be delayed till later if
6216 there is only address to be delivered - if it succeeds the spool write need not
6219 if (header_rewritten &&
6220 ((addr_local != NULL &&
6221 (addr_local->next != NULL || addr_remote != NULL)) ||
6222 (addr_remote != NULL && addr_remote->next != NULL)))
6224 /* Panic-dies on error */
6225 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6226 header_rewritten = FALSE;
6230 /* If there are any deliveries to be done, open the journal file. This is used
6231 to record successful deliveries as soon as possible after each delivery is
6232 known to be complete. A file opened with O_APPEND is used so that several
6233 processes can run simultaneously.
6235 The journal is just insurance against crashes. When the spool file is
6236 ultimately updated at the end of processing, the journal is deleted. If a
6237 journal is found to exist at the start of delivery, the addresses listed
6238 therein are added to the non-recipients. */
6240 if (addr_local != NULL || addr_remote != NULL)
6242 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
6243 journal_fd = Uopen(spoolname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE);
6247 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
6248 spoolname, strerror(errno));
6249 return DELIVER_NOT_ATTEMPTED;
6252 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
6253 that the mode is correct - the group setting doesn't always seem to get
6254 set automatically. */
6256 if( fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
6257 || fchown(journal_fd, exim_uid, exim_gid)
6258 || fchmod(journal_fd, SPOOL_MODE)
6261 int ret = Uunlink(spoolname);
6262 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
6263 spoolname, strerror(errno));
6264 if(ret && errno != ENOENT)
6265 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6266 spoolname, strerror(errno));
6267 return DELIVER_NOT_ATTEMPTED;
6273 /* Now we can get down to the business of actually doing deliveries. Local
6274 deliveries are done first, then remote ones. If ever the problems of how to
6275 handle fallback transports are figured out, this section can be put into a loop
6276 for handling fallbacks, though the uid switching will have to be revised. */
6278 /* Precompile a regex that is used to recognize a parameter in response
6279 to an LHLO command, if is isn't already compiled. This may be used on both
6280 local and remote LMTP deliveries. */
6282 if (regex_IGNOREQUOTA == NULL) regex_IGNOREQUOTA =
6283 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
6285 /* Handle local deliveries */
6287 if (addr_local != NULL)
6289 DEBUG(D_deliver|D_transport)
6290 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
6291 do_local_deliveries();
6292 disable_logging = FALSE;
6295 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
6296 so just queue them all. */
6298 if (queue_run_local)
6300 while (addr_remote != NULL)
6302 address_item *addr = addr_remote;
6303 addr_remote = addr->next;
6305 addr->basic_errno = ERRNO_LOCAL_ONLY;
6306 addr->message = US"remote deliveries suppressed";
6307 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
6311 /* Handle remote deliveries */
6313 if (addr_remote != NULL)
6315 DEBUG(D_deliver|D_transport)
6316 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
6318 /* Precompile some regex that are used to recognize parameters in response
6319 to an EHLO command, if they aren't already compiled. */
6321 if (regex_PIPELINING == NULL) regex_PIPELINING =
6322 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
6324 if (regex_SIZE == NULL) regex_SIZE =
6325 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
6327 if (regex_AUTH == NULL) regex_AUTH =
6328 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
6332 if (regex_STARTTLS == NULL) regex_STARTTLS =
6333 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
6336 #ifndef DISABLE_PRDR
6337 if (regex_PRDR == NULL) regex_PRDR =
6338 regex_must_compile(US"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE, TRUE);
6341 #ifdef EXPERIMENTAL_DSN
6342 /* Set the regex to check for DSN support on remote MTA */
6343 if (regex_DSN == NULL) regex_DSN =
6344 regex_must_compile(US"\\n250[\\s\\-]DSN(\\s|\\n|$)", FALSE, TRUE);
6347 /* Now sort the addresses if required, and do the deliveries. The yield of
6348 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
6349 cannot be delivered in one transaction. */
6351 if (remote_sort_domains != NULL) sort_remote_deliveries();
6352 if (!do_remote_deliveries(FALSE))
6354 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
6355 "be delivered in one transaction");
6356 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
6358 final_yield = DELIVER_MUA_FAILED;
6359 addr_failed = addr_defer = NULL; /* So that we remove the message */
6360 goto DELIVERY_TIDYUP;
6363 /* See if any of the addresses that failed got put on the queue for delivery
6364 to their fallback hosts. We do it this way because often the same fallback
6365 host is used for many domains, so all can be sent in a single transaction
6366 (if appropriately configured). */
6368 if (addr_fallback != NULL && !mua_wrapper)
6370 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
6371 addr_remote = addr_fallback;
6372 addr_fallback = NULL;
6373 if (remote_sort_domains != NULL) sort_remote_deliveries();
6374 do_remote_deliveries(TRUE);
6376 disable_logging = FALSE;
6380 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6381 phase, to minimize cases of half-done things. */
6384 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6386 /* Root privilege is no longer needed */
6388 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
6390 set_process_info("tidying up after delivering %s", message_id);
6391 signal(SIGTERM, SIG_IGN);
6393 /* When we are acting as an MUA wrapper, the smtp transport will either have
6394 succeeded for all addresses, or failed them all in normal cases. However, there
6395 are some setup situations (e.g. when a named port does not exist) that cause an
6396 immediate exit with deferral of all addresses. Convert those into failures. We
6397 do not ever want to retry, nor do we want to send a bounce message. */
6401 if (addr_defer != NULL)
6403 address_item *addr, *nextaddr;
6404 for (addr = addr_defer; addr != NULL; addr = nextaddr)
6406 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
6407 "delivery", addr->address);
6408 nextaddr = addr->next;
6409 addr->next = addr_failed;
6415 /* Now all should either have succeeded or failed. */
6417 if (addr_failed == NULL) final_yield = DELIVER_MUA_SUCCEEDED; else
6419 uschar *s = (addr_failed->user_message != NULL)?
6420 addr_failed->user_message : addr_failed->message;
6422 fprintf(stderr, "Delivery failed: ");
6423 if (addr_failed->basic_errno > 0)
6425 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
6426 if (s != NULL) fprintf(stderr, ": ");
6430 if (addr_failed->basic_errno <= 0) fprintf(stderr, "unknown error");
6432 else fprintf(stderr, "%s", CS s);
6433 fprintf(stderr, "\n");
6435 final_yield = DELIVER_MUA_FAILED;
6440 /* In a normal configuration, we now update the retry database. This is done in
6441 one fell swoop at the end in order not to keep opening and closing (and
6442 locking) the database. The code for handling retries is hived off into a
6443 separate module for convenience. We pass it the addresses of the various
6444 chains, because deferred addresses can get moved onto the failed chain if the
6445 retry cutoff time has expired for all alternative destinations. Bypass the
6446 updating of the database if the -N flag is set, which is a debugging thing that
6447 prevents actual delivery. */
6449 else if (!dont_deliver) retry_update(&addr_defer, &addr_failed, &addr_succeed);
6451 #ifdef EXPERIMENTAL_DSN
6452 /* Send DSN for successful messages */
6453 addr_dsntmp = addr_succeed;
6454 addr_senddsn = NULL;
6456 while(addr_dsntmp != NULL)
6459 debug_printf("DSN: processing router : %s\n", addr_dsntmp->router->name);
6462 debug_printf("DSN: processing successful delivery address: %s\n", addr_dsntmp->address);
6464 /* af_ignore_error not honored here. it's not an error */
6466 DEBUG(D_deliver) debug_printf("DSN: Sender_address: %s\n", sender_address);
6467 DEBUG(D_deliver) debug_printf("DSN: orcpt: %s flags: %d\n", addr_dsntmp->dsn_orcpt, addr_dsntmp->dsn_flags);
6468 DEBUG(D_deliver) debug_printf("DSN: envid: %s ret: %d\n", dsn_envid, dsn_ret);
6469 DEBUG(D_deliver) debug_printf("DSN: Final recipient: %s\n", addr_dsntmp->address);
6470 DEBUG(D_deliver) debug_printf("DSN: Remote SMTP server supports DSN: %d\n", addr_dsntmp->dsn_aware);
6472 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
6473 and a report was requested */
6474 if (((addr_dsntmp->dsn_aware != dsn_support_yes) ||
6475 ((addr_dsntmp->dsn_flags & rf_dsnlasthop) != 0))
6477 (((addr_dsntmp->dsn_flags & rf_dsnflags) != 0) &&
6478 ((addr_dsntmp->dsn_flags & rf_notify_success) != 0)))
6480 /* copy and relink address_item and send report with all of them at once later */
6481 address_item *addr_next;
6482 addr_next = addr_senddsn;
6483 addr_senddsn = store_get(sizeof(address_item));
6484 memcpy(addr_senddsn, addr_dsntmp, sizeof(address_item));
6485 addr_senddsn->next = addr_next;
6489 DEBUG(D_deliver) debug_printf("DSN: *** NOT SENDING DSN SUCCESS Message ***\n");
6492 addr_dsntmp = addr_dsntmp->next;
6495 if (addr_senddsn != NULL)
6500 /* create exim process to send message */
6501 pid = child_open_exim(&fd);
6503 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
6505 if (pid < 0) /* Creation of child failed */
6507 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6508 "create child process to send failure message: %s", getpid(),
6509 getppid(), strerror(errno));
6511 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
6514 else /* Creation of child succeeded */
6516 FILE *f = fdopen(fd, "wb");
6517 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
6518 int topt = topt_add_return_path | topt_no_body;
6519 uschar boundaryStr[64];
6521 DEBUG(D_deliver) debug_printf("sending error message to: %s\n", sender_address);
6523 /* build unique id for MIME boundary */
6524 snprintf(boundaryStr, sizeof(boundaryStr)-1, TIME_T_FMT "-eximdsn-%d",
6525 time(NULL), rand());
6526 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", boundaryStr);
6528 if (errors_reply_to)
6529 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6531 fprintf(f, "Auto-Submitted: auto-generated\n"
6532 "From: Mail Delivery System <Mailer-Daemon@%s>\n"
6534 "Subject: Delivery Status Notification\n"
6535 "Content-Type: multipart/report; report-type=delivery-status; boundary=%s\n"
6536 "MIME-Version: 1.0\n\n"
6539 "Content-type: text/plain; charset=us-ascii\n\n"
6541 "This message was created automatically by mail delivery software.\n"
6542 " ----- The following addresses had successful delivery notifications -----\n",
6543 qualify_domain_sender, sender_address, boundaryStr, boundaryStr);
6545 addr_dsntmp = addr_senddsn;
6548 fprintf(f, "<%s> (relayed %s)\n\n",
6549 addr_dsntmp->address,
6550 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1
6551 ? "via non DSN router"
6552 : addr_dsntmp->dsn_aware == dsn_support_no
6553 ? "to non-DSN-aware mailer"
6554 : "via non \"Remote SMTP\" router"
6556 addr_dsntmp = addr_dsntmp->next;
6559 "Content-type: message/delivery-status\n\n"
6560 "Reporting-MTA: dns; %s\n",
6561 boundaryStr, smtp_active_hostname);
6563 if (dsn_envid != NULL) {
6564 /* must be decoded from xtext: see RFC 3461:6.3a */
6566 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
6567 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
6569 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
6573 for (addr_dsntmp = addr_senddsn;
6575 addr_dsntmp = addr_dsntmp->next)
6577 if (addr_dsntmp->dsn_orcpt)
6578 fprintf(f,"Original-Recipient: %s\n", addr_dsntmp->dsn_orcpt);
6580 fprintf(f, "Action: delivered\n"
6581 "Final-Recipient: rfc822;%s\n"
6583 addr_dsntmp->address);
6585 if (addr_dsntmp->host_used && addr_dsntmp->host_used->name)
6586 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n",
6587 addr_dsntmp->host_used->name);
6589 fprintf(f,"Diagnostic-Code: X-Exim; relayed via non %s router\n",
6590 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1 ? "DSN" : "SMTP");
6594 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", boundaryStr);
6597 transport_filter_argv = NULL; /* Just in case */
6598 return_path = sender_address; /* In case not previously set */
6600 /* Write the original email out */
6601 transport_write_message(NULL, fileno(f), topt, 0, NULL, NULL, NULL, NULL, NULL, 0);
6605 fprintf(f,"--%s--\n", boundaryStr);
6609 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
6612 #endif /*EXPERIMENTAL_DSN*/
6614 /* If any addresses failed, we must send a message to somebody, unless
6615 af_ignore_error is set, in which case no action is taken. It is possible for
6616 several messages to get sent if there are addresses with different
6619 while (addr_failed != NULL)
6623 uschar *logtod = tod_stamp(tod_log);
6625 address_item *handled_addr = NULL;
6626 address_item **paddr;
6627 address_item *msgchain = NULL;
6628 address_item **pmsgchain = &msgchain;
6630 /* There are weird cases when logging is disabled in the transport. However,
6631 there may not be a transport (address failed by a router). */
6633 disable_logging = FALSE;
6634 if (addr_failed->transport != NULL)
6635 disable_logging = addr_failed->transport->disable_logging;
6638 debug_printf("processing failed address %s\n", addr_failed->address);
6640 /* There are only two ways an address in a bounce message can get here:
6642 (1) When delivery was initially deferred, but has now timed out (in the call
6643 to retry_update() above). We can detect this by testing for
6644 af_retry_timedout. If the address does not have its own errors address,
6645 we arrange to ignore the error.
6647 (2) If delivery failures for bounce messages are being ignored. We can detect
6648 this by testing for af_ignore_error. This will also be set if a bounce
6649 message has been autothawed and the ignore_bounce_errors_after time has
6650 passed. It might also be set if a router was explicitly configured to
6651 ignore errors (errors_to = "").
6653 If neither of these cases obtains, something has gone wrong. Log the
6654 incident, but then ignore the error. */
6656 if (sender_address[0] == 0 && addr_failed->p.errors_address == NULL)
6658 if (!testflag(addr_failed, af_retry_timedout) &&
6659 !testflag(addr_failed, af_ignore_error))
6661 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
6662 "failure is neither frozen nor ignored (it's been ignored)");
6664 setflag(addr_failed, af_ignore_error);
6667 /* If the first address on the list has af_ignore_error set, just remove
6668 it from the list, throw away any saved message file, log it, and
6669 mark the recipient done. */
6671 if (testflag(addr_failed, af_ignore_error)
6672 #ifdef EXPERIMENTAL_DSN
6673 || (((addr_failed->dsn_flags & rf_dsnflags) != 0)
6674 && ((addr_failed->dsn_flags & rf_notify_failure) != rf_notify_failure))
6679 addr_failed = addr->next;
6680 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
6682 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
6684 (addr->parent == NULL)? US"" : US" <",
6685 (addr->parent == NULL)? US"" : addr->parent->address,
6686 (addr->parent == NULL)? US"" : US">");
6688 address_done(addr, logtod);
6689 child_done(addr, logtod);
6690 /* Panic-dies on error */
6691 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6694 /* Otherwise, handle the sending of a message. Find the error address for
6695 the first address, then send a message that includes all failed addresses
6696 that have the same error address. Note the bounce_recipient is a global so
6697 that it can be accesssed by $bounce_recipient while creating a customized
6702 bounce_recipient = (addr_failed->p.errors_address == NULL)?
6703 sender_address : addr_failed->p.errors_address;
6705 /* Make a subprocess to send a message */
6707 pid = child_open_exim(&fd);
6709 /* Creation of child failed */
6712 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6713 "create child process to send failure message: %s", getpid(),
6714 getppid(), strerror(errno));
6716 /* Creation of child succeeded */
6723 uschar *bcc, *emf_text;
6724 FILE *f = fdopen(fd, "wb");
6726 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
6727 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
6728 DELIVER_IN_BUFFER_SIZE;
6729 #ifdef EXPERIMENTAL_DSN
6730 uschar boundaryStr[64];
6731 uschar *dsnlimitmsg;
6732 uschar *dsnnotifyhdr;
6737 debug_printf("sending error message to: %s\n", bounce_recipient);
6739 /* Scan the addresses for all that have the same errors address, removing
6740 them from the addr_failed chain, and putting them on msgchain. */
6742 paddr = &addr_failed;
6743 for (addr = addr_failed; addr != NULL; addr = *paddr)
6745 if (Ustrcmp(bounce_recipient, (addr->p.errors_address == NULL)?
6746 sender_address : addr->p.errors_address) != 0)
6748 paddr = &(addr->next); /* Not the same; skip */
6750 else /* The same - dechain */
6752 *paddr = addr->next;
6755 pmsgchain = &(addr->next);
6759 /* Include X-Failed-Recipients: for automatic interpretation, but do
6760 not let any one header line get too long. We do this by starting a
6761 new header every 50 recipients. Omit any addresses for which the
6762 "hide_child" flag is set. */
6764 for (addr = msgchain; addr != NULL; addr = addr->next)
6766 if (testflag(addr, af_hide_child)) continue;
6773 (rcount++ == 0)? "X-Failed-Recipients: " : ",\n ",
6774 (testflag(addr, af_pfr) && addr->parent != NULL)?
6775 string_printing(addr->parent->address) :
6776 string_printing(addr->address));
6778 if (rcount > 0) fprintf(f, "\n");
6780 /* Output the standard headers */
6782 if (errors_reply_to != NULL)
6783 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6784 fprintf(f, "Auto-Submitted: auto-replied\n");
6786 fprintf(f, "To: %s\n", bounce_recipient);
6788 #ifdef EXPERIMENTAL_DSN
6789 /* generate boundary string and output MIME-Headers */
6790 snprintf(boundaryStr, sizeof(boundaryStr)-1, TIME_T_FMT "-eximdsn-%d",
6791 time(NULL), rand());
6793 fprintf(f, "Content-Type: multipart/report;"
6794 " report-type=delivery-status; boundary=%s\n"
6795 "MIME-Version: 1.0\n",
6799 /* Open a template file if one is provided. Log failure to open, but
6800 carry on - default texts will be used. */
6802 if (bounce_message_file)
6803 if (!(emf = Ufopen(bounce_message_file, "rb")))
6804 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
6805 "message texts: %s", bounce_message_file, strerror(errno));
6807 /* Quietly copy to configured additional addresses if required. */
6809 if ((bcc = moan_check_errorcopy(bounce_recipient)))
6810 fprintf(f, "Bcc: %s\n", bcc);
6812 /* The texts for the message can be read from a template file; if there
6813 isn't one, or if it is too short, built-in texts are used. The first
6814 emf text is a Subject: and any other headers. */
6816 if ((emf_text = next_emf(emf, US"header")))
6817 fprintf(f, "%s\n", emf_text);
6819 fprintf(f, "Subject: Mail delivery failed%s\n\n",
6820 to_sender? ": returning message to sender" : "");
6822 #ifdef EXPERIMENTAL_DSN
6823 /* output human readable part as text/plain section */
6825 "Content-type: text/plain; charset=us-ascii\n\n",
6829 if ((emf_text = next_emf(emf, US"intro")))
6830 fprintf(f, "%s", CS emf_text);
6834 /* This message has been reworded several times. It seems to be confusing to
6835 somebody, however it is worded. I have retreated to the original, simple
6837 "This message was created automatically by mail delivery software.\n");
6839 if (bounce_message_text)
6840 fprintf(f, "%s", CS bounce_message_text);
6843 "\nA message that you sent could not be delivered to one or more of its\n"
6844 "recipients. This is a permanent error. The following address(es) failed:\n");
6847 "\nA message sent by\n\n <%s>\n\n"
6848 "could not be delivered to one or more of its recipients. The following\n"
6849 "address(es) failed:\n", sender_address);
6853 /* Process the addresses, leaving them on the msgchain if they have a
6854 file name for a return message. (There has already been a check in
6855 post_process_one() for the existence of data in the message file.) A TRUE
6856 return from print_address_information() means that the address is not
6860 for (addr = msgchain; addr != NULL; addr = *paddr)
6862 if (print_address_information(addr, f, US" ", US"\n ", US""))
6863 print_address_error(addr, f, US"");
6865 /* End the final line for the address */
6869 /* Leave on msgchain if there's a return file. */
6871 if (addr->return_file >= 0)
6873 paddr = &(addr->next);
6877 /* Else save so that we can tick off the recipient when the
6882 *paddr = addr->next;
6883 addr->next = handled_addr;
6884 handled_addr = addr;
6890 /* Get the next text, whether we need it or not, so as to be
6891 positioned for the one after. */
6893 emf_text = next_emf(emf, US"generated text");
6895 /* If there were any file messages passed by the local transports,
6896 include them in the message. Then put the address on the handled chain.
6897 In the case of a batch of addresses that were all sent to the same
6898 transport, the return_file field in all of them will contain the same
6899 fd, and the return_filename field in the *last* one will be set (to the
6900 name of the file). */
6904 address_item *nextaddr;
6907 fprintf(f, "%s", CS emf_text);
6910 "The following text was generated during the delivery "
6911 "attempt%s:\n", (filecount > 1)? "s" : "");
6913 for (addr = msgchain; addr != NULL; addr = nextaddr)
6916 address_item *topaddr = addr;
6918 /* List all the addresses that relate to this file */
6921 while(addr) /* Insurance */
6923 print_address_information(addr, f, US"------ ", US"\n ",
6925 if (addr->return_filename) break;
6930 /* Now copy the file */
6932 fm = Ufopen(addr->return_filename, "rb");
6935 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
6939 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
6942 Uunlink(addr->return_filename);
6944 /* Can now add to handled chain, first fishing off the next
6945 address on the msgchain. */
6947 nextaddr = addr->next;
6948 addr->next = handled_addr;
6949 handled_addr = topaddr;
6954 #ifdef EXPERIMENTAL_DSN
6955 /* output machine readable part */
6957 "Content-type: message/delivery-status\n\n"
6958 "Reporting-MTA: dns; %s\n",
6959 boundaryStr, smtp_active_hostname);
6963 /* must be decoded from xtext: see RFC 3461:6.3a */
6965 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
6966 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
6968 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
6972 for (addr = handled_addr; addr; addr = addr->next)
6974 fprintf(f, "Action: failed\n"
6975 "Final-Recipient: rfc822;%s\n"
6978 if (addr->host_used && addr->host_used->name)
6979 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; %d\n",
6980 addr->host_used->name, addr->basic_errno);
6984 /* Now copy the message, trying to give an intelligible comment if
6985 it is too long for it all to be copied. The limit isn't strictly
6986 applied because of the buffering. There is, however, an option
6987 to suppress copying altogether. */
6989 emf_text = next_emf(emf, US"copy");
6991 #ifndef EXPERIMENTAL_DSN
6992 if (bounce_return_message)
6994 int topt = topt_add_return_path;
6995 if (!bounce_return_body) topt |= topt_no_body;
6998 fprintf(f, "%s", CS emf_text);
7001 if (bounce_return_body) fprintf(f,
7002 "------ This is a copy of the message, including all the headers. ------\n");
7004 "------ This is a copy of the message's headers. ------\n");
7007 /* While reading the "truncated" message, set return_size_limit to
7008 the actual max testing value, rounded. We need to read the message
7009 whether we are going to use it or not. */
7012 int temp = bounce_return_size_limit;
7013 bounce_return_size_limit = (max/1000)*1000;
7014 emf_text = next_emf(emf, US"truncated");
7015 bounce_return_size_limit = temp;
7018 if (bounce_return_body && bounce_return_size_limit > 0)
7020 struct stat statbuf;
7021 if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max)
7023 fprintf(f, "%s", CS emf_text);
7026 "------ The body of the message is " OFF_T_FMT " characters long; only the first\n"
7027 "------ %d or so are included here.\n", statbuf.st_size, max);
7033 transport_filter_argv = NULL; /* Just in case */
7034 return_path = sender_address; /* In case not previously set */
7035 transport_write_message(NULL, fileno(f), topt,
7036 bounce_return_size_limit, NULL, NULL, NULL, NULL, NULL, 0);
7039 /* Write final text and close the template file if one is open */
7043 if ((emf_text = next_emf(emf, US"final")))
7044 fprintf(f, "%s", CS emf_text);
7049 we ignore the intro text from template and add
7050 the text for bounce_return_size_limit at the end.
7052 bounce_return_message is ignored
7053 in case RET= is defined we honor these values
7054 otherwise bounce_return_body is honored.
7056 bounce_return_size_limit is always honored.
7059 fprintf(f, "\n--%s\n", boundaryStr);
7061 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7062 dsnnotifyhdr = NULL;
7063 topt = topt_add_return_path;
7065 /* RET=HDRS? top priority */
7066 if (dsn_ret == dsn_ret_hdrs)
7067 topt |= topt_no_body;
7069 /* no full body return at all? */
7070 if (!bounce_return_body)
7072 topt |= topt_no_body;
7073 /* add header if we overrule RET=FULL */
7074 if (dsn_ret == dsn_ret_full)
7075 dsnnotifyhdr = dsnlimitmsg;
7077 /* size limited ... return headers only if limit reached */
7078 else if (bounce_return_size_limit > 0)
7080 struct stat statbuf;
7081 if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max)
7083 topt |= topt_no_body;
7084 dsnnotifyhdr = dsnlimitmsg;
7088 if (topt & topt_no_body)
7089 fprintf(f,"Content-type: text/rfc822-headers\n\n");
7091 fprintf(f,"Content-type: message/rfc822\n\n");
7094 transport_filter_argv = NULL; /* Just in case */
7095 return_path = sender_address; /* In case not previously set */
7096 transport_write_message(NULL, fileno(f), topt,
7097 0, dsnnotifyhdr, NULL, NULL, NULL, NULL, 0);
7100 /* we never add the final text. close the file */
7104 fprintf(f, "\n--%s--\n", boundaryStr);
7105 #endif /*EXPERIMENTAL_DSN*/
7107 /* Close the file, which should send an EOF to the child process
7108 that is receiving the message. Wait for it to finish. */
7111 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7113 /* In the test harness, let the child do it's thing first. */
7115 if (running_in_test_harness) millisleep(500);
7117 /* If the process failed, there was some disaster in setting up the
7118 error message. Unless the message is very old, ensure that addr_defer
7119 is non-null, which will have the effect of leaving the message on the
7120 spool. The failed addresses will get tried again next time. However, we
7121 don't really want this to happen too often, so freeze the message unless
7122 there are some genuine deferred addresses to try. To do this we have
7123 to call spool_write_header() here, because with no genuine deferred
7124 addresses the normal code below doesn't get run. */
7129 if (now - received_time < retry_maximum_timeout && addr_defer == NULL)
7131 addr_defer = (address_item *)(+1);
7132 deliver_freeze = TRUE;
7133 deliver_frozen_at = time(NULL);
7134 /* Panic-dies on error */
7135 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7138 deliver_msglog("Process failed (%d) when writing error message "
7139 "to %s%s", rc, bounce_recipient, s);
7140 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
7141 "to %s%s", rc, bounce_recipient, s);
7144 /* The message succeeded. Ensure that the recipients that failed are
7145 now marked finished with on the spool and their parents updated. */
7149 for (addr = handled_addr; addr != NULL; addr = addr->next)
7151 address_done(addr, logtod);
7152 child_done(addr, logtod);
7154 /* Panic-dies on error */
7155 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7161 disable_logging = FALSE; /* In case left set */
7163 /* Come here from the mua_wrapper case if routing goes wrong */
7167 /* If there are now no deferred addresses, we are done. Preserve the
7168 message log if so configured, and we are using them. Otherwise, sling it.
7169 Then delete the message itself. */
7171 if (addr_defer == NULL)
7175 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir,
7177 if (preserve_message_logs)
7180 sprintf(CS big_buffer, "%s/msglog.OLD/%s", spool_directory, id);
7181 if ((rc = Urename(spoolname, big_buffer)) < 0)
7183 (void)directory_make(spool_directory, US"msglog.OLD",
7184 MSGLOG_DIRECTORY_MODE, TRUE);
7185 rc = Urename(spoolname, big_buffer);
7188 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
7189 "msglog.OLD directory", spoolname);
7193 if (Uunlink(spoolname) < 0)
7194 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7195 spoolname, strerror(errno));
7199 /* Remove the two message files. */
7201 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
7202 if (Uunlink(spoolname) < 0)
7203 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7204 spoolname, strerror(errno));
7205 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
7206 if (Uunlink(spoolname) < 0)
7207 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7208 spoolname, strerror(errno));
7210 /* Log the end of this message, with queue time if requested. */
7212 if ((log_extra_selector & LX_queue_time_overall) != 0)
7213 log_write(0, LOG_MAIN, "Completed QT=%s",
7214 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
7216 log_write(0, LOG_MAIN, "Completed");
7218 /* Unset deliver_freeze so that we won't try to move the spool files further down */
7219 deliver_freeze = FALSE;
7222 /* If there are deferred addresses, we are keeping this message because it is
7223 not yet completed. Lose any temporary files that were catching output from
7224 pipes for any of the deferred addresses, handle one-time aliases, and see if
7225 the message has been on the queue for so long that it is time to send a warning
7226 message to the sender, unless it is a mailer-daemon. If all deferred addresses
7227 have the same domain, we can set deliver_domain for the expansion of
7228 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
7229 the parent's domain.
7231 If all the deferred addresses have an error number that indicates "retry time
7232 not reached", skip sending the warning message, because it won't contain the
7233 reason for the delay. It will get sent at the next real delivery attempt.
7234 However, if at least one address has tried, we'd better include all of them in
7237 If we can't make a process to send the message, don't worry.
7239 For mailing list expansions we want to send the warning message to the
7240 mailing list manager. We can't do a perfect job here, as some addresses may
7241 have different errors addresses, but if we take the errors address from
7242 each deferred address it will probably be right in most cases.
7244 If addr_defer == +1, it means there was a problem sending an error message
7245 for failed addresses, and there were no "real" deferred addresses. The value
7246 was set just to keep the message on the spool, so there is nothing to do here.
7249 else if (addr_defer != (address_item *)(+1))
7252 uschar *recipients = US"";
7253 BOOL delivery_attempted = FALSE;
7255 deliver_domain = testflag(addr_defer, af_pfr)?
7256 addr_defer->parent->domain : addr_defer->domain;
7258 for (addr = addr_defer; addr != NULL; addr = addr->next)
7260 address_item *otaddr;
7262 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
7264 if (deliver_domain != NULL)
7266 uschar *d = (testflag(addr, af_pfr))? addr->parent->domain : addr->domain;
7268 /* The domain may be unset for an address that has never been routed
7269 because the system filter froze the message. */
7271 if (d == NULL || Ustrcmp(d, deliver_domain) != 0) deliver_domain = NULL;
7274 if (addr->return_filename != NULL) Uunlink(addr->return_filename);
7276 /* Handle the case of one-time aliases. If any address in the ancestry
7277 of this one is flagged, ensure it is in the recipients list, suitably
7278 flagged, and that its parent is marked delivered. */
7280 for (otaddr = addr; otaddr != NULL; otaddr = otaddr->parent)
7281 if (otaddr->onetime_parent != NULL) break;
7286 int t = recipients_count;
7288 for (i = 0; i < recipients_count; i++)
7290 uschar *r = recipients_list[i].address;
7291 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
7292 if (Ustrcmp(otaddr->address, r) == 0) break;
7295 /* Didn't find the address already in the list, and did find the
7296 ultimate parent's address in the list. After adding the recipient,
7297 update the errors address in the recipients list. */
7299 if (i >= recipients_count && t < recipients_count)
7301 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
7302 otaddr->address, otaddr->parent->address);
7303 receive_add_recipient(otaddr->address, t);
7304 recipients_list[recipients_count-1].errors_to = otaddr->p.errors_address;
7305 tree_add_nonrecipient(otaddr->parent->address);
7306 update_spool = TRUE;
7310 /* Except for error messages, ensure that either the errors address for
7311 this deferred address or, if there is none, the sender address, is on the
7312 list of recipients for a warning message. */
7314 if (sender_address[0] != 0)
7316 if (addr->p.errors_address == NULL)
7318 if (Ustrstr(recipients, sender_address) == NULL)
7319 recipients = string_sprintf("%s%s%s", recipients,
7320 (recipients[0] == 0)? "" : ",", sender_address);
7324 if (Ustrstr(recipients, addr->p.errors_address) == NULL)
7325 recipients = string_sprintf("%s%s%s", recipients,
7326 (recipients[0] == 0)? "" : ",", addr->p.errors_address);
7331 /* Send a warning message if the conditions are right. If the condition check
7332 fails because of a lookup defer, there is nothing we can do. The warning
7333 is not sent. Another attempt will be made at the next delivery attempt (if
7336 if (!queue_2stage && delivery_attempted &&
7337 #ifdef EXPERIMENTAL_DSN
7338 (((addr_defer->dsn_flags & rf_dsnflags) == 0) ||
7339 (addr_defer->dsn_flags & rf_notify_delay) == rf_notify_delay) &&
7341 delay_warning[1] > 0 && sender_address[0] != 0 &&
7342 (delay_warning_condition == NULL ||
7343 expand_check_condition(delay_warning_condition,
7344 US"delay_warning", US"option")))
7348 int queue_time = time(NULL) - received_time;
7350 /* When running in the test harness, there's an option that allows us to
7351 fudge this time so as to get repeatability of the tests. Take the first
7352 time off the list. In queue runs, the list pointer gets updated in the
7355 if (running_in_test_harness && fudged_queue_times[0] != 0)
7357 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
7360 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
7361 fudged_queue_times);
7366 /* See how many warnings we should have sent by now */
7368 for (count = 0; count < delay_warning[1]; count++)
7369 if (queue_time < delay_warning[count+2]) break;
7371 show_time = delay_warning[count+1];
7373 if (count >= delay_warning[1])
7376 int last_gap = show_time;
7377 if (count > 1) last_gap -= delay_warning[count];
7378 extra = (queue_time - delay_warning[count+1])/last_gap;
7379 show_time += last_gap * extra;
7385 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
7386 debug_printf("warning counts: required %d done %d\n", count,
7390 /* We have computed the number of warnings there should have been by now.
7391 If there haven't been enough, send one, and up the count to what it should
7394 if (warning_count < count)
7398 pid_t pid = child_open_exim(&fd);
7404 FILE *f = fdopen(fd, "wb");
7405 #ifdef EXPERIMENTAL_DSN
7406 uschar boundaryStr[64];
7409 if (warn_message_file)
7411 wmf = Ufopen(warn_message_file, "rb");
7413 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
7414 "message texts: %s", warn_message_file, strerror(errno));
7417 warnmsg_recipients = recipients;
7418 warnmsg_delay = (queue_time < 120*60)?
7419 string_sprintf("%d minutes", show_time/60):
7420 string_sprintf("%d hours", show_time/3600);
7422 if (errors_reply_to)
7423 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7424 fprintf(f, "Auto-Submitted: auto-replied\n");
7426 fprintf(f, "To: %s\n", recipients);
7428 #ifdef EXPERIMENTAL_DSN
7429 /* generated boundary string and output MIME-Headers */
7430 snprintf(boundaryStr, sizeof(boundaryStr)-1,
7431 TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7433 fprintf(f, "Content-Type: multipart/report;"
7434 " report-type=delivery-status; boundary=%s\n"
7435 "MIME-Version: 1.0\n",
7439 if ((wmf_text = next_emf(wmf, US"header")))
7440 fprintf(f, "%s\n", wmf_text);
7442 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
7443 message_id, warnmsg_delay);
7445 #ifdef EXPERIMENTAL_DSN
7446 /* output human readable part as text/plain section */
7448 "Content-type: text/plain; charset=us-ascii\n\n",
7452 if ((wmf_text = next_emf(wmf, US"intro")))
7453 fprintf(f, "%s", CS wmf_text);
7457 "This message was created automatically by mail delivery software.\n");
7459 if (Ustrcmp(recipients, sender_address) == 0)
7461 "A message that you sent has not yet been delivered to one or more of its\n"
7462 "recipients after more than ");
7466 "A message sent by\n\n <%s>\n\n"
7467 "has not yet been delivered to one or more of its recipients after more than \n",
7470 fprintf(f, "%s on the queue on %s.\n\n"
7471 "The message identifier is: %s\n",
7472 warnmsg_delay, primary_hostname, message_id);
7474 for (h = header_list; h != NULL; h = h->next)
7475 if (strncmpic(h->text, US"Subject:", 8) == 0)
7476 fprintf(f, "The subject of the message is: %s", h->text + 9);
7477 else if (strncmpic(h->text, US"Date:", 5) == 0)
7478 fprintf(f, "The date of the message is: %s", h->text + 6);
7481 fprintf(f, "The address%s to which the message has not yet been "
7483 !addr_defer->next ? "" : "es",
7484 !addr_defer->next ? "is": "are");
7487 /* List the addresses, with error information if allowed */
7489 #ifdef EXPERIMENTAL_DSN
7490 /* store addr_defer for machine readable part */
7491 address_item *addr_dsndefer = addr_defer;
7496 address_item *addr = addr_defer;
7497 addr_defer = addr->next;
7498 if (print_address_information(addr, f, US" ", US"\n ", US""))
7499 print_address_error(addr, f, US"Delay reason: ");
7508 if ((wmf_text = next_emf(wmf, US"final")))
7509 fprintf(f, "%s", CS wmf_text);
7515 "No action is required on your part. Delivery attempts will continue for\n"
7516 "some time, and this warning may be repeated at intervals if the message\n"
7517 "remains undelivered. Eventually the mail delivery software will give up,\n"
7518 "and when that happens, the message will be returned to you.\n");
7521 #ifdef EXPERIMENTAL_DSN
7522 /* output machine readable part */
7523 fprintf(f, "\n--%s\n"
7524 "Content-type: message/delivery-status\n\n"
7525 "Reporting-MTA: dns; %s\n",
7527 smtp_active_hostname);
7532 /* must be decoded from xtext: see RFC 3461:6.3a */
7534 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7535 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
7537 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
7541 while (addr_dsndefer)
7543 if (addr_dsndefer->dsn_orcpt)
7544 fprintf(f,"Original-Recipient: %s\n", addr_dsndefer->dsn_orcpt);
7546 fprintf(f,"Action: delayed\n");
7547 fprintf(f,"Final-Recipient: rfc822;%s\n", addr_dsndefer->address);
7548 fprintf(f,"Status: 4.0.0\n");
7549 if (addr_dsndefer->host_used && addr_dsndefer->host_used->name)
7550 fprintf(f,"Remote-MTA: dns; %s\nDiagnostic-Code: smtp; %d\n",
7551 addr_dsndefer->host_used->name, addr_dsndefer->basic_errno);
7552 addr_dsndefer = addr_dsndefer->next;
7555 fprintf(f, "\n--%s\n"
7556 "Content-type: text/rfc822-headers\n\n",
7560 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7561 int topt = topt_add_return_path | topt_no_body;
7562 transport_filter_argv = NULL; /* Just in case */
7563 return_path = sender_address; /* In case not previously set */
7564 /* Write the original email out */
7565 transport_write_message(NULL, fileno(f), topt, 0, NULL, NULL, NULL, NULL, NULL, 0);
7568 fprintf(f,"\n--%s--\n", boundaryStr);
7571 #endif /*EXPERIMENTAL_DSN*/
7573 /* Close and wait for child process to complete, without a timeout.
7574 If there's an error, don't update the count. */
7577 if (child_close(pid, 0) == 0)
7579 warning_count = count;
7580 update_spool = TRUE; /* Ensure spool rewritten */
7586 /* Clear deliver_domain */
7588 deliver_domain = NULL;
7590 /* If this was a first delivery attempt, unset the first time flag, and
7591 ensure that the spool gets updated. */
7593 if (deliver_firsttime)
7595 deliver_firsttime = FALSE;
7596 update_spool = TRUE;
7599 /* If delivery was frozen and freeze_tell is set, generate an appropriate
7600 message, unless the message is a local error message (to avoid loops). Then
7601 log the freezing. If the text in "frozen_info" came from a system filter,
7602 it has been escaped into printing characters so as not to mess up log lines.
7603 For the "tell" message, we turn \n back into newline. Also, insert a newline
7604 near the start instead of the ": " string. */
7608 if (freeze_tell != NULL && freeze_tell[0] != 0 && !local_error_message)
7610 uschar *s = string_copy(frozen_info);
7611 uschar *ss = Ustrstr(s, " by the system filter: ");
7622 if (*ss == '\\' && ss[1] == 'n')
7629 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
7630 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
7634 /* Log freezing just before we update the -H file, to minimize the chance
7635 of a race problem. */
7637 deliver_msglog("*** Frozen%s\n", frozen_info);
7638 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
7641 /* If there have been any updates to the non-recipients list, or other things
7642 that get written to the spool, we must now update the spool header file so
7643 that it has the right information for the next delivery attempt. If there
7644 was more than one address being delivered, the header_change update is done
7645 earlier, in case one succeeds and then something crashes. */
7648 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
7649 update_spool, header_rewritten);
7651 if (update_spool || header_rewritten)
7652 /* Panic-dies on error */
7653 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7656 /* Finished with the message log. If the message is complete, it will have
7657 been unlinked or renamed above. */
7659 if (message_logs) (void)fclose(message_log);
7661 /* Now we can close and remove the journal file. Its only purpose is to record
7662 successfully completed deliveries asap so that this information doesn't get
7663 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
7664 not serious, as trying it again is not harmful. The journal might not be open
7665 if all addresses were deferred at routing or directing. Nevertheless, we must
7666 remove it if it exists (may have been lying around from a crash during the
7667 previous delivery attempt). We don't remove the journal if a delivery
7668 subprocess failed to pass back delivery information; this is controlled by
7669 the remove_journal flag. When the journal is left, we also don't move the
7670 message off the main spool if frozen and the option is set. It should get moved
7671 at the next attempt, after the journal has been inspected. */
7673 if (journal_fd >= 0) (void)close(journal_fd);
7677 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
7678 if (Uunlink(spoolname) < 0 && errno != ENOENT)
7679 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", spoolname,
7682 /* Move the message off the spool if reqested */
7684 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
7685 if (deliver_freeze && move_frozen_messages)
7686 (void)spool_move_message(id, message_subdir, US"", US"F");
7690 /* Closing the data file frees the lock; if the file has been unlinked it
7691 will go away. Otherwise the message becomes available for another process
7694 (void)close(deliver_datafile);
7695 deliver_datafile = -1;
7696 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
7698 /* It is unlikely that there will be any cached resources, since they are
7699 released after routing, and in the delivery subprocesses. However, it's
7700 possible for an expansion for something afterwards (for example,
7701 expand_check_condition) to do a lookup. We must therefore be sure everything is
7705 acl_where = ACL_WHERE_UNKNOWN;
7711 /* End of deliver.c */