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
)
704 #ifdef EXPERIMENTAL_DANE
705 testflag(addr
, af_dane_verified
)
711 if ((log_extra_selector
& LX_tls_peerdn
) != 0 && addr
->peerdn
!= NULL
)
712 s
= string_append(s
, sizep
, ptrp
, 3, US
" DN=\"",
713 string_printing(addr
->peerdn
), US
"\"");
721 #ifdef EXPERIMENTAL_TPDA
723 tpda_raise_event(uschar
* action
, uschar
* event
, uschar
* ev_data
)
729 debug_printf("TPDA(%s): tpda_event_action=|%s| tpda_delivery_IP=%s\n",
731 action
, deliver_host_address
);
736 if (!(s
= expand_string(action
)) && *expand_string_message
)
737 log_write(0, LOG_MAIN
|LOG_PANIC
,
738 "failed to expand tpda_event_action %s in %s: %s\n",
739 event
, transport_name
, expand_string_message
);
741 tpda_event
= tpda_data
= NULL
;
743 /* If the expansion returns anything but an empty string, flag for
744 the caller to modify his normal processing
749 debug_printf("TPDA(%s): event_action returned \"%s\"\n", event
, s
);
757 tpda_msg_event(uschar
* event
, address_item
* addr
)
759 uschar
* save_domain
= deliver_domain
;
760 uschar
* save_local
= deliver_localpart
;
761 uschar
* save_host
= deliver_host
;
763 if (!addr
->transport
)
766 router_name
= addr
->router
? addr
->router
->name
: NULL
;
767 transport_name
= addr
->transport
->name
;
768 deliver_domain
= addr
->domain
;
769 deliver_localpart
= addr
->local_part
;
770 deliver_host
= addr
->host_used
? addr
->host_used
->name
: NULL
;
772 (void) tpda_raise_event(addr
->transport
->tpda_event_action
, event
,
773 addr
->host_used
|| Ustrcmp(addr
->transport
->driver_name
, "lmtp") == 0
774 ? addr
->message
: NULL
);
776 deliver_host
= save_host
;
777 deliver_localpart
= save_local
;
778 deliver_domain
= save_domain
;
779 router_name
= transport_name
= NULL
;
781 #endif /*EXPERIMENTAL_TPDA*/
785 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
786 this is a nonstandard call; no two-character delivery flag is written
787 but sender-host and sender are prefixed and "msg" is inserted in the log line.
790 flags passed to log_write()
793 delivery_log(int flags
, address_item
* addr
, int logchar
, uschar
* msg
)
796 int size
= 256; /* Used for a temporary, */
797 int ptr
= 0; /* expanding buffer, for */
798 uschar
*s
; /* building log lines; */
799 void *reset_point
; /* released afterwards. */
801 /* Log the delivery on the main log. We use an extensible string to build up
802 the log line, and reset the store afterwards. Remote deliveries should always
803 have a pointer to the host item that succeeded; local deliveries can have a
804 pointer to a single host item in their host list, for use by the transport. */
806 #ifdef EXPERIMENTAL_TPDA
807 /* presume no successful remote delivery */
808 lookup_dnssec_authenticated
= NULL
;
811 s
= reset_point
= store_get(size
);
813 log_address
= string_log_address(addr
, (log_write_selector
& L_all_parents
) != 0, TRUE
);
815 s
= string_append(s
, &size
, &ptr
, 3, host_and_ident(TRUE
), US
" ", log_address
);
819 s
= string_append(s
, &size
, &ptr
, 2, US
"> ", log_address
);
822 if ((log_extra_selector
& LX_sender_on_delivery
) != 0 || msg
)
823 s
= string_append(s
, &size
, &ptr
, 3, US
" F=<", sender_address
, US
">");
825 #ifdef EXPERIMENTAL_SRS
826 if(addr
->p
.srs_sender
)
827 s
= string_append(s
, &size
, &ptr
, 3, US
" SRS=<", addr
->p
.srs_sender
, US
">");
830 /* You might think that the return path must always be set for a successful
831 delivery; indeed, I did for some time, until this statement crashed. The case
832 when it is not set is for a delivery to /dev/null which is optimised by not
835 if (used_return_path
!= NULL
&&
836 (log_extra_selector
& LX_return_path_on_delivery
) != 0)
837 s
= string_append(s
, &size
, &ptr
, 3, US
" P=<", used_return_path
, US
">");
840 s
= string_append(s
, &size
, &ptr
, 2, US
" ", msg
);
842 /* For a delivery from a system filter, there may not be a router */
843 if (addr
->router
!= NULL
)
844 s
= string_append(s
, &size
, &ptr
, 2, US
" R=", addr
->router
->name
);
846 s
= string_append(s
, &size
, &ptr
, 2, US
" T=", addr
->transport
->name
);
848 if ((log_extra_selector
& LX_delivery_size
) != 0)
849 s
= string_append(s
, &size
, &ptr
, 2, US
" S=",
850 string_sprintf("%d", transport_count
));
854 if (addr
->transport
->info
->local
)
857 s
= string_append(s
, &size
, &ptr
, 2, US
" H=", addr
->host_list
->name
);
858 if (addr
->shadow_message
!= NULL
)
859 s
= string_cat(s
, &size
, &ptr
, addr
->shadow_message
,
860 Ustrlen(addr
->shadow_message
));
863 /* Remote delivery */
869 s
= d_hostlog(s
, &size
, &ptr
, addr
);
870 if (continue_sequence
> 1)
871 s
= string_cat(s
, &size
, &ptr
, US
"*", 1);
873 #ifdef EXPERIMENTAL_TPDA
874 deliver_host_address
= addr
->host_used
->address
;
875 deliver_host_port
= addr
->host_used
->port
;
877 /* DNS lookup status */
878 lookup_dnssec_authenticated
= addr
->host_used
->dnssec
==DS_YES
? US
"yes"
879 : addr
->host_used
->dnssec
==DS_NO
? US
"no"
885 s
= d_tlslog(s
, &size
, &ptr
, addr
);
888 if (addr
->authenticator
)
890 s
= string_append(s
, &size
, &ptr
, 2, US
" A=", addr
->authenticator
);
893 s
= string_append(s
, &size
, &ptr
, 2, US
":", addr
->auth_id
);
894 if (log_extra_selector
& LX_smtp_mailauth
&& addr
->auth_sndr
)
895 s
= string_append(s
, &size
, &ptr
, 2, US
":", addr
->auth_sndr
);
900 if (addr
->flags
& af_prdr_used
)
901 s
= string_append(s
, &size
, &ptr
, 1, US
" PRDR");
905 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
907 if (log_extra_selector
& LX_smtp_confirmation
&&
909 (addr
->host_used
|| Ustrcmp(addr
->transport
->driver_name
, "lmtp") == 0))
912 uschar
*p
= big_buffer
;
913 uschar
*ss
= addr
->message
;
915 for (i
= 0; i
< 256 && ss
[i
] != 0; i
++) /* limit logged amount */
917 if (ss
[i
] == '\"' || ss
[i
] == '\\') *p
++ = '\\'; /* quote \ and " */
922 s
= string_append(s
, &size
, &ptr
, 2, US
" C=", big_buffer
);
925 /* Time on queue and actual time taken to deliver */
927 if ((log_extra_selector
& LX_queue_time
) != 0)
928 s
= string_append(s
, &size
, &ptr
, 2, US
" QT=",
929 readconf_printtime( (int) ((long)time(NULL
) - (long)received_time
)) );
931 if ((log_extra_selector
& LX_deliver_time
) != 0)
932 s
= string_append(s
, &size
, &ptr
, 2, US
" DT=",
933 readconf_printtime(addr
->more_errno
));
935 /* string_cat() always leaves room for the terminator. Release the
936 store we used to build the line after writing it. */
939 log_write(0, flags
, "%s", s
);
941 #ifdef EXPERIMENTAL_TPDA
942 if (!msg
) tpda_msg_event(US
"msg:delivery", addr
);
945 store_reset(reset_point
);
951 /*************************************************
952 * Actions at the end of handling an address *
953 *************************************************/
955 /* This is a function for processing a single address when all that can be done
956 with it has been done.
959 addr points to the address block
960 result the result of the delivery attempt
961 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
962 driver_type indicates which type of driver (transport, or router) was last
963 to process the address
964 logchar '=' or '-' for use when logging deliveries with => or ->
970 post_process_one(address_item
*addr
, int result
, int logflags
, int driver_type
,
973 uschar
*now
= tod_stamp(tod_log
);
974 uschar
*driver_kind
= NULL
;
975 uschar
*driver_name
= NULL
;
978 int size
= 256; /* Used for a temporary, */
979 int ptr
= 0; /* expanding buffer, for */
980 uschar
*s
; /* building log lines; */
981 void *reset_point
; /* released afterwards. */
983 DEBUG(D_deliver
) debug_printf("post-process %s (%d)\n", addr
->address
, result
);
985 /* Set up driver kind and name for logging. Disable logging if the router or
986 transport has disabled it. */
988 if (driver_type
== DTYPE_TRANSPORT
)
990 if (addr
->transport
!= NULL
)
992 driver_name
= addr
->transport
->name
;
993 driver_kind
= US
" transport";
994 disable_logging
= addr
->transport
->disable_logging
;
996 else driver_kind
= US
"transporting";
998 else if (driver_type
== DTYPE_ROUTER
)
1000 if (addr
->router
!= NULL
)
1002 driver_name
= addr
->router
->name
;
1003 driver_kind
= US
" router";
1004 disable_logging
= addr
->router
->disable_logging
;
1006 else driver_kind
= US
"routing";
1009 /* If there's an error message set, ensure that it contains only printing
1010 characters - it should, but occasionally things slip in and this at least
1011 stops the log format from getting wrecked. We also scan the message for an LDAP
1012 expansion item that has a password setting, and flatten the password. This is a
1013 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1014 malformed, it won't ever have gone near LDAP.) */
1016 if (addr
->message
!= NULL
)
1018 addr
->message
= string_printing(addr
->message
);
1019 if (((Ustrstr(addr
->message
, "failed to expand") != NULL
) || (Ustrstr(addr
->message
, "expansion of ") != NULL
)) &&
1020 (Ustrstr(addr
->message
, "mysql") != NULL
||
1021 Ustrstr(addr
->message
, "pgsql") != NULL
||
1022 #ifdef EXPERIMENTAL_REDIS
1023 Ustrstr(addr
->message
, "redis") != NULL
||
1025 Ustrstr(addr
->message
, "sqlite") != NULL
||
1026 Ustrstr(addr
->message
, "ldap:") != NULL
||
1027 Ustrstr(addr
->message
, "ldapdn:") != NULL
||
1028 Ustrstr(addr
->message
, "ldapm:") != NULL
))
1030 addr
->message
= string_sprintf("Temporary internal error");
1034 /* If we used a transport that has one of the "return_output" options set, and
1035 if it did in fact generate some output, then for return_output we treat the
1036 message as failed if it was not already set that way, so that the output gets
1037 returned to the sender, provided there is a sender to send it to. For
1038 return_fail_output, do this only if the delivery failed. Otherwise we just
1039 unlink the file, and remove the name so that if the delivery failed, we don't
1040 try to send back an empty or unwanted file. The log_output options operate only
1041 on a non-empty file.
1043 In any case, we close the message file, because we cannot afford to leave a
1044 file-descriptor for one address while processing (maybe very many) others. */
1046 if (addr
->return_file
>= 0 && addr
->return_filename
!= NULL
)
1048 BOOL return_output
= FALSE
;
1049 struct stat statbuf
;
1050 (void)EXIMfsync(addr
->return_file
);
1052 /* If there is no output, do nothing. */
1054 if (fstat(addr
->return_file
, &statbuf
) == 0 && statbuf
.st_size
> 0)
1056 transport_instance
*tb
= addr
->transport
;
1058 /* Handle logging options */
1060 if (tb
->log_output
|| (result
== FAIL
&& tb
->log_fail_output
) ||
1061 (result
== DEFER
&& tb
->log_defer_output
))
1064 FILE *f
= Ufopen(addr
->return_filename
, "rb");
1066 log_write(0, LOG_MAIN
|LOG_PANIC
, "failed to open %s to log output "
1067 "from %s transport: %s", addr
->return_filename
, tb
->name
,
1071 s
= US
Ufgets(big_buffer
, big_buffer_size
, f
);
1074 uschar
*p
= big_buffer
+ Ustrlen(big_buffer
);
1075 while (p
> big_buffer
&& isspace(p
[-1])) p
--;
1077 s
= string_printing(big_buffer
);
1078 log_write(0, LOG_MAIN
, "<%s>: %s transport output: %s",
1079 addr
->address
, tb
->name
, s
);
1085 /* Handle returning options, but only if there is an address to return
1088 if (sender_address
[0] != 0 || addr
->p
.errors_address
!= NULL
)
1090 if (tb
->return_output
)
1092 addr
->transport_return
= result
= FAIL
;
1093 if (addr
->basic_errno
== 0 && addr
->message
== NULL
)
1094 addr
->message
= US
"return message generated";
1095 return_output
= TRUE
;
1098 if (tb
->return_fail_output
&& result
== FAIL
) return_output
= TRUE
;
1102 /* Get rid of the file unless it might be returned, but close it in
1107 Uunlink(addr
->return_filename
);
1108 addr
->return_filename
= NULL
;
1109 addr
->return_file
= -1;
1112 (void)close(addr
->return_file
);
1115 /* The success case happens only after delivery by a transport. */
1119 addr
->next
= addr_succeed
;
1120 addr_succeed
= addr
;
1122 /* Call address_done() to ensure that we don't deliver to this address again,
1123 and write appropriate things to the message log. If it is a child address, we
1124 call child_done() to scan the ancestors and mark them complete if this is the
1125 last child to complete. */
1127 address_done(addr
, now
);
1128 DEBUG(D_deliver
) debug_printf("%s delivered\n", addr
->address
);
1130 if (addr
->parent
== NULL
)
1131 deliver_msglog("%s %s: %s%s succeeded\n", now
, addr
->address
,
1132 driver_name
, driver_kind
);
1135 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now
, addr
->address
,
1136 addr
->parent
->address
, driver_name
, driver_kind
);
1137 child_done(addr
, now
);
1140 /* Certificates for logging (via TPDA) */
1142 tls_out
.ourcert
= addr
->ourcert
;
1143 addr
->ourcert
= NULL
;
1144 tls_out
.peercert
= addr
->peercert
;
1145 addr
->peercert
= NULL
;
1147 tls_out
.cipher
= addr
->cipher
;
1148 tls_out
.peerdn
= addr
->peerdn
;
1149 tls_out
.ocsp
= addr
->ocsp
;
1150 # ifdef EXPERIMENTAL_DANE
1151 tls_out
.dane_verified
= testflag(addr
, af_dane_verified
);
1155 delivery_log(LOG_MAIN
, addr
, logchar
, NULL
);
1158 if (tls_out
.ourcert
)
1160 tls_free_cert(tls_out
.ourcert
);
1161 tls_out
.ourcert
= NULL
;
1163 if (tls_out
.peercert
)
1165 tls_free_cert(tls_out
.peercert
);
1166 tls_out
.peercert
= NULL
;
1168 tls_out
.cipher
= NULL
;
1169 tls_out
.peerdn
= NULL
;
1170 tls_out
.ocsp
= OCSP_NOT_REQ
;
1171 # ifdef EXPERIMENTAL_DANE
1172 tls_out
.dane_verified
= FALSE
;
1178 /* Soft failure, or local delivery process failed; freezing may be
1181 else if (result
== DEFER
|| result
== PANIC
)
1183 if (result
== PANIC
) logflags
|= LOG_PANIC
;
1185 /* This puts them on the chain in reverse order. Do not change this, because
1186 the code for handling retries assumes that the one with the retry
1187 information is last. */
1189 addr
->next
= addr_defer
;
1192 /* The only currently implemented special action is to freeze the
1193 message. Logging of this is done later, just before the -H file is
1196 if (addr
->special_action
== SPECIAL_FREEZE
)
1198 deliver_freeze
= TRUE
;
1199 deliver_frozen_at
= time(NULL
);
1200 update_spool
= TRUE
;
1203 /* If doing a 2-stage queue run, we skip writing to either the message
1204 log or the main log for SMTP defers. */
1206 if (!queue_2stage
|| addr
->basic_errno
!= 0)
1210 /* For errors of the type "retry time not reached" (also remotes skipped
1211 on queue run), logging is controlled by L_retry_defer. Note that this kind
1212 of error number is negative, and all the retry ones are less than any
1215 unsigned int use_log_selector
= (addr
->basic_errno
<= ERRNO_RETRY_BASE
)?
1218 /* Build up the line that is used for both the message log and the main
1221 s
= reset_point
= store_get(size
);
1223 /* Create the address string for logging. Must not do this earlier, because
1224 an OK result may be changed to FAIL when a pipe returns text. */
1226 log_address
= string_log_address(addr
,
1227 (log_write_selector
& L_all_parents
) != 0, result
== OK
);
1229 s
= string_cat(s
, &size
, &ptr
, log_address
, Ustrlen(log_address
));
1231 /* Either driver_name contains something and driver_kind contains
1232 " router" or " transport" (note the leading space), or driver_name is
1233 a null string and driver_kind contains "routing" without the leading
1234 space, if all routing has been deferred. When a domain has been held,
1235 so nothing has been done at all, both variables contain null strings. */
1237 if (driver_name
== NULL
)
1239 if (driver_kind
!= NULL
)
1240 s
= string_append(s
, &size
, &ptr
, 2, US
" ", driver_kind
);
1244 if (driver_kind
[1] == 't' && addr
->router
!= NULL
)
1245 s
= string_append(s
, &size
, &ptr
, 2, US
" R=", addr
->router
->name
);
1247 ss
[1] = toupper(driver_kind
[1]);
1248 s
= string_append(s
, &size
, &ptr
, 2, ss
, driver_name
);
1251 sprintf(CS ss
, " defer (%d)", addr
->basic_errno
);
1252 s
= string_cat(s
, &size
, &ptr
, ss
, Ustrlen(ss
));
1254 if (addr
->basic_errno
> 0)
1255 s
= string_append(s
, &size
, &ptr
, 2, US
": ",
1256 US
strerror(addr
->basic_errno
));
1258 if (addr
->host_used
)
1259 s
= string_append(s
, &size
, &ptr
, 5,
1260 US
" H=", addr
->host_used
->name
,
1261 US
" [", addr
->host_used
->address
, US
"]");
1263 if (addr
->message
!= NULL
)
1264 s
= string_append(s
, &size
, &ptr
, 2, US
": ", addr
->message
);
1268 /* Log the deferment in the message log, but don't clutter it
1269 up with retry-time defers after the first delivery attempt. */
1271 if (deliver_firsttime
|| addr
->basic_errno
> ERRNO_RETRY_BASE
)
1272 deliver_msglog("%s %s\n", now
, s
);
1274 /* Write the main log and reset the store */
1276 log_write(use_log_selector
, logflags
, "== %s", s
);
1277 store_reset(reset_point
);
1282 /* Hard failure. If there is an address to which an error message can be sent,
1283 put this address on the failed list. If not, put it on the deferred list and
1284 freeze the mail message for human attention. The latter action can also be
1285 explicitly requested by a router or transport. */
1289 /* If this is a delivery error, or a message for which no replies are
1290 wanted, and the message's age is greater than ignore_bounce_errors_after,
1291 force the af_ignore_error flag. This will cause the address to be discarded
1292 later (with a log entry). */
1294 if (sender_address
[0] == 0 && message_age
>= ignore_bounce_errors_after
)
1295 setflag(addr
, af_ignore_error
);
1297 /* Freeze the message if requested, or if this is a bounce message (or other
1298 message with null sender) and this address does not have its own errors
1299 address. However, don't freeze if errors are being ignored. The actual code
1300 to ignore occurs later, instead of sending a message. Logging of freezing
1301 occurs later, just before writing the -H file. */
1303 if (!testflag(addr
, af_ignore_error
) &&
1304 (addr
->special_action
== SPECIAL_FREEZE
||
1305 (sender_address
[0] == 0 && addr
->p
.errors_address
== NULL
)
1308 frozen_info
= (addr
->special_action
== SPECIAL_FREEZE
)? US
"" :
1309 (sender_local
&& !local_error_message
)?
1310 US
" (message created with -f <>)" : US
" (delivery error message)";
1311 deliver_freeze
= TRUE
;
1312 deliver_frozen_at
= time(NULL
);
1313 update_spool
= TRUE
;
1315 /* The address is put on the defer rather than the failed queue, because
1316 the message is being retained. */
1318 addr
->next
= addr_defer
;
1322 /* Don't put the address on the nonrecipients tree yet; wait until an
1323 error message has been successfully sent. */
1327 addr
->next
= addr_failed
;
1331 /* Build up the log line for the message and main logs */
1333 s
= reset_point
= store_get(size
);
1335 /* Create the address string for logging. Must not do this earlier, because
1336 an OK result may be changed to FAIL when a pipe returns text. */
1338 log_address
= string_log_address(addr
,
1339 (log_write_selector
& L_all_parents
) != 0, result
== OK
);
1341 s
= string_cat(s
, &size
, &ptr
, log_address
, Ustrlen(log_address
));
1343 if ((log_extra_selector
& LX_sender_on_delivery
) != 0)
1344 s
= string_append(s
, &size
, &ptr
, 3, US
" F=<", sender_address
, US
">");
1346 /* Return path may not be set if no delivery actually happened */
1348 if (used_return_path
!= NULL
&&
1349 (log_extra_selector
& LX_return_path_on_delivery
) != 0)
1350 s
= string_append(s
, &size
, &ptr
, 3, US
" P=<", used_return_path
, US
">");
1352 if (addr
->router
!= NULL
)
1353 s
= string_append(s
, &size
, &ptr
, 2, US
" R=", addr
->router
->name
);
1354 if (addr
->transport
!= NULL
)
1355 s
= string_append(s
, &size
, &ptr
, 2, US
" T=", addr
->transport
->name
);
1357 if (addr
->host_used
!= NULL
)
1358 s
= d_hostlog(s
, &size
, &ptr
, addr
);
1361 s
= d_tlslog(s
, &size
, &ptr
, addr
);
1364 if (addr
->basic_errno
> 0)
1365 s
= string_append(s
, &size
, &ptr
, 2, US
": ",
1366 US
strerror(addr
->basic_errno
));
1368 if (addr
->message
!= NULL
)
1369 s
= string_append(s
, &size
, &ptr
, 2, US
": ", addr
->message
);
1373 /* Do the logging. For the message log, "routing failed" for those cases,
1374 just to make it clearer. */
1376 if (driver_name
== NULL
)
1377 deliver_msglog("%s %s failed for %s\n", now
, driver_kind
, s
);
1379 deliver_msglog("%s %s\n", now
, s
);
1381 log_write(0, LOG_MAIN
, "** %s", s
);
1383 #ifdef EXPERIMENTAL_TPDA
1384 tpda_msg_event(US
"msg:fail:delivery", addr
);
1387 store_reset(reset_point
);
1390 /* Ensure logging is turned on again in all cases */
1392 disable_logging
= FALSE
;
1398 /*************************************************
1399 * Address-independent error *
1400 *************************************************/
1402 /* This function is called when there's an error that is not dependent on a
1403 particular address, such as an expansion string failure. It puts the error into
1404 all the addresses in a batch, logs the incident on the main and panic logs, and
1405 clears the expansions. It is mostly called from local_deliver(), but can be
1406 called for a remote delivery via findugid().
1409 logit TRUE if (MAIN+PANIC) logging required
1410 addr the first of the chain of addresses
1412 format format string for error message, or NULL if already set in addr
1413 ... arguments for the format
1419 common_error(BOOL logit
, address_item
*addr
, int code
, uschar
*format
, ...)
1421 address_item
*addr2
;
1422 addr
->basic_errno
= code
;
1428 va_start(ap
, format
);
1429 if (!string_vformat(buffer
, sizeof(buffer
), CS format
, ap
))
1430 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
1431 "common_error expansion was longer than " SIZE_T_FMT
, sizeof(buffer
));
1433 addr
->message
= string_copy(buffer
);
1436 for (addr2
= addr
->next
; addr2
!= NULL
; addr2
= addr2
->next
)
1438 addr2
->basic_errno
= code
;
1439 addr2
->message
= addr
->message
;
1442 if (logit
) log_write(0, LOG_MAIN
|LOG_PANIC
, "%s", addr
->message
);
1443 deliver_set_expansions(NULL
);
1449 /*************************************************
1450 * Check a "never users" list *
1451 *************************************************/
1453 /* This function is called to check whether a uid is on one of the two "never
1457 uid the uid to be checked
1458 nusers the list to be scanned; the first item in the list is the count
1460 Returns: TRUE if the uid is on the list
1464 check_never_users(uid_t uid
, uid_t
*nusers
)
1467 if (nusers
== NULL
) return FALSE
;
1468 for (i
= 1; i
<= (int)(nusers
[0]); i
++) if (nusers
[i
] == uid
) return TRUE
;
1474 /*************************************************
1475 * Find uid and gid for a transport *
1476 *************************************************/
1478 /* This function is called for both local and remote deliveries, to find the
1479 uid/gid under which to run the delivery. The values are taken preferentially
1480 from the transport (either explicit or deliver_as_creator), then from the
1481 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1482 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1483 panic error is logged, and the function fails (which normally leads to delivery
1487 addr the address (possibly a chain)
1489 uidp pointer to uid field
1490 gidp pointer to gid field
1491 igfp pointer to the use_initgroups field
1493 Returns: FALSE if failed - error has been set in address(es)
1497 findugid(address_item
*addr
, transport_instance
*tp
, uid_t
*uidp
, gid_t
*gidp
,
1500 uschar
*nuname
= NULL
;
1501 BOOL gid_set
= FALSE
;
1503 /* Default initgroups flag comes from the transport */
1505 *igfp
= tp
->initgroups
;
1507 /* First see if there's a gid on the transport, either fixed or expandable.
1508 The expanding function always logs failure itself. */
1515 else if (tp
->expand_gid
!= NULL
)
1517 if (route_find_expanded_group(tp
->expand_gid
, tp
->name
, US
"transport", gidp
,
1518 &(addr
->message
))) gid_set
= TRUE
;
1521 common_error(FALSE
, addr
, ERRNO_GIDFAIL
, NULL
);
1526 /* If the transport did not set a group, see if the router did. */
1528 if (!gid_set
&& testflag(addr
, af_gid_set
))
1534 /* Pick up a uid from the transport if one is set. */
1536 if (tp
->uid_set
) *uidp
= tp
->uid
;
1538 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1539 it does not provide a passwd value from which a gid can be taken. */
1541 else if (tp
->expand_uid
!= NULL
)
1544 if (!route_find_expanded_user(tp
->expand_uid
, tp
->name
, US
"transport", &pw
,
1545 uidp
, &(addr
->message
)))
1547 common_error(FALSE
, addr
, ERRNO_UIDFAIL
, NULL
);
1550 if (!gid_set
&& pw
!= NULL
)
1557 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1559 else if (tp
->deliver_as_creator
)
1561 *uidp
= originator_uid
;
1564 *gidp
= originator_gid
;
1569 /* Otherwise see if the address specifies the uid and if so, take it and its
1572 else if (testflag(addr
, af_uid_set
))
1575 *igfp
= testflag(addr
, af_initgroups
);
1578 /* Nothing has specified the uid - default to the Exim user, and group if the
1591 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1592 defaulting to the Exim uid. In other words, if the configuration has specified
1593 a uid, it must also provide a gid. */
1597 common_error(TRUE
, addr
, ERRNO_GIDFAIL
, US
"User set without group for "
1598 "%s transport", tp
->name
);
1602 /* Check that the uid is not on the lists of banned uids that may not be used
1603 for delivery processes. */
1605 if (check_never_users(*uidp
, never_users
))
1606 nuname
= US
"never_users";
1607 else if (check_never_users(*uidp
, fixed_never_users
))
1608 nuname
= US
"fixed_never_users";
1612 common_error(TRUE
, addr
, ERRNO_UIDFAIL
, US
"User %ld set for %s transport "
1613 "is on the %s list", (long int)(*uidp
), tp
->name
, nuname
);
1625 /*************************************************
1626 * Check the size of a message for a transport *
1627 *************************************************/
1629 /* Checks that the message isn't too big for the selected transport.
1630 This is called only when it is known that the limit is set.
1634 addr the (first) address being delivered
1637 DEFER expansion failed or did not yield an integer
1638 FAIL message too big
1642 check_message_size(transport_instance
*tp
, address_item
*addr
)
1647 deliver_set_expansions(addr
);
1648 size_limit
= expand_string_integer(tp
->message_size_limit
, TRUE
);
1649 deliver_set_expansions(NULL
);
1651 if (expand_string_message
!= NULL
)
1654 if (size_limit
== -1)
1655 addr
->message
= string_sprintf("failed to expand message_size_limit "
1656 "in %s transport: %s", tp
->name
, expand_string_message
);
1658 addr
->message
= string_sprintf("invalid message_size_limit "
1659 "in %s transport: %s", tp
->name
, expand_string_message
);
1661 else if (size_limit
> 0 && message_size
> size_limit
)
1665 string_sprintf("message is too big (transport limit = %d)",
1674 /*************************************************
1675 * Transport-time check for a previous delivery *
1676 *************************************************/
1678 /* Check that this base address hasn't previously been delivered to its routed
1679 transport. If it has been delivered, mark it done. The check is necessary at
1680 delivery time in order to handle homonymic addresses correctly in cases where
1681 the pattern of redirection changes between delivery attempts (so the unique
1682 fields change). Non-homonymic previous delivery is detected earlier, at routing
1683 time (which saves unnecessary routing).
1686 addr the address item
1687 testing TRUE if testing wanted only, without side effects
1689 Returns: TRUE if previously delivered by the transport
1693 previously_transported(address_item
*addr
, BOOL testing
)
1695 (void)string_format(big_buffer
, big_buffer_size
, "%s/%s",
1696 addr
->unique
+ (testflag(addr
, af_homonym
)? 3:0), addr
->transport
->name
);
1698 if (tree_search(tree_nonrecipients
, big_buffer
) != 0)
1700 DEBUG(D_deliver
|D_route
|D_transport
)
1701 debug_printf("%s was previously delivered (%s transport): discarded\n",
1702 addr
->address
, addr
->transport
->name
);
1703 if (!testing
) child_done(addr
, tod_stamp(tod_log
));
1712 /******************************************************
1713 * Check for a given header in a header string *
1714 ******************************************************/
1716 /* This function is used when generating quota warnings. The configuration may
1717 specify any header lines it likes in quota_warn_message. If certain of them are
1718 missing, defaults are inserted, so we need to be able to test for the presence
1722 hdr the required header name
1723 hstring the header string
1725 Returns: TRUE the header is in the string
1726 FALSE the header is not in the string
1730 contains_header(uschar
*hdr
, uschar
*hstring
)
1732 int len
= Ustrlen(hdr
);
1733 uschar
*p
= hstring
;
1736 if (strncmpic(p
, hdr
, len
) == 0)
1739 while (*p
== ' ' || *p
== '\t') p
++;
1740 if (*p
== ':') return TRUE
;
1742 while (*p
!= 0 && *p
!= '\n') p
++;
1743 if (*p
== '\n') p
++;
1751 /*************************************************
1752 * Perform a local delivery *
1753 *************************************************/
1755 /* Each local delivery is performed in a separate process which sets its
1756 uid and gid as specified. This is a safer way than simply changing and
1757 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
1758 used safely. From release 4, Exim no longer makes any use of it. Besides, not
1759 all systems have seteuid().
1761 If the uid/gid are specified in the transport_instance, they are used; the
1762 transport initialization must ensure that either both or neither are set.
1763 Otherwise, the values associated with the address are used. If neither are set,
1764 it is a configuration error.
1766 The transport or the address may specify a home directory (transport over-
1767 rides), and if they do, this is set as $home. If neither have set a working
1768 directory, this value is used for that as well. Otherwise $home is left unset
1769 and the cwd is set to "/" - a directory that should be accessible to all users.
1771 Using a separate process makes it more complicated to get error information
1772 back. We use a pipe to pass the return code and also an error code and error
1773 text string back to the parent process.
1776 addr points to an address block for this delivery; for "normal" local
1777 deliveries this is the only address to be delivered, but for
1778 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
1779 a number of addresses can be handled simultaneously, and in this
1780 case addr will point to a chain of addresses with the same
1783 shadowing TRUE if running a shadow transport; this causes output from pipes
1790 deliver_local(address_item
*addr
, BOOL shadowing
)
1792 BOOL use_initgroups
;
1795 int status
, len
, rc
;
1798 uschar
*working_directory
;
1799 address_item
*addr2
;
1800 transport_instance
*tp
= addr
->transport
;
1802 /* Set up the return path from the errors or sender address. If the transport
1803 has its own return path setting, expand it and replace the existing value. */
1805 if(addr
->p
.errors_address
!= NULL
)
1806 return_path
= addr
->p
.errors_address
;
1807 #ifdef EXPERIMENTAL_SRS
1808 else if(addr
->p
.srs_sender
!= NULL
)
1809 return_path
= addr
->p
.srs_sender
;
1812 return_path
= sender_address
;
1814 if (tp
->return_path
!= NULL
)
1816 uschar
*new_return_path
= expand_string(tp
->return_path
);
1817 if (new_return_path
== NULL
)
1819 if (!expand_string_forcedfail
)
1821 common_error(TRUE
, addr
, ERRNO_EXPANDFAIL
,
1822 US
"Failed to expand return path \"%s\" in %s transport: %s",
1823 tp
->return_path
, tp
->name
, expand_string_message
);
1827 else return_path
= new_return_path
;
1830 /* For local deliveries, one at a time, the value used for logging can just be
1831 set directly, once and for all. */
1833 used_return_path
= return_path
;
1835 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
1836 gets put into the address(es), and the expansions are unset, so we can just
1839 if (!findugid(addr
, tp
, &uid
, &gid
, &use_initgroups
)) return;
1841 /* See if either the transport or the address specifies a home directory. A
1842 home directory set in the address may already be expanded; a flag is set to
1843 indicate that. In other cases we must expand it. */
1845 if ((deliver_home
= tp
->home_dir
) != NULL
|| /* Set in transport, or */
1846 ((deliver_home
= addr
->home_dir
) != NULL
&& /* Set in address and */
1847 !testflag(addr
, af_home_expanded
))) /* not expanded */
1849 uschar
*rawhome
= deliver_home
;
1850 deliver_home
= NULL
; /* in case it contains $home */
1851 deliver_home
= expand_string(rawhome
);
1852 if (deliver_home
== NULL
)
1854 common_error(TRUE
, addr
, ERRNO_EXPANDFAIL
, US
"home directory \"%s\" failed "
1855 "to expand for %s transport: %s", rawhome
, tp
->name
,
1856 expand_string_message
);
1859 if (*deliver_home
!= '/')
1861 common_error(TRUE
, addr
, ERRNO_NOTABSOLUTE
, US
"home directory path \"%s\" "
1862 "is not absolute for %s transport", deliver_home
, tp
->name
);
1867 /* See if either the transport or the address specifies a current directory,
1868 and if so, expand it. If nothing is set, use the home directory, unless it is
1869 also unset in which case use "/", which is assumed to be a directory to which
1870 all users have access. It is necessary to be in a visible directory for some
1871 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
1872 2.5) require this. */
1874 working_directory
= (tp
->current_dir
!= NULL
)?
1875 tp
->current_dir
: addr
->current_dir
;
1877 if (working_directory
!= NULL
)
1879 uschar
*raw
= working_directory
;
1880 working_directory
= expand_string(raw
);
1881 if (working_directory
== NULL
)
1883 common_error(TRUE
, addr
, ERRNO_EXPANDFAIL
, US
"current directory \"%s\" "
1884 "failed to expand for %s transport: %s", raw
, tp
->name
,
1885 expand_string_message
);
1888 if (*working_directory
!= '/')
1890 common_error(TRUE
, addr
, ERRNO_NOTABSOLUTE
, US
"current directory path "
1891 "\"%s\" is not absolute for %s transport", working_directory
, tp
->name
);
1895 else working_directory
= (deliver_home
== NULL
)? US
"/" : deliver_home
;
1897 /* If one of the return_output flags is set on the transport, create and open a
1898 file in the message log directory for the transport to write its output onto.
1899 This is mainly used by pipe transports. The file needs to be unique to the
1900 address. This feature is not available for shadow transports. */
1902 if (!shadowing
&& (tp
->return_output
|| tp
->return_fail_output
||
1903 tp
->log_output
|| tp
->log_fail_output
))
1906 addr
->return_filename
=
1907 string_sprintf("%s/msglog/%s/%s-%d-%d", spool_directory
, message_subdir
,
1908 message_id
, getpid(), return_count
++);
1909 addr
->return_file
= open_msglog_file(addr
->return_filename
, 0400, &error
);
1910 if (addr
->return_file
< 0)
1912 common_error(TRUE
, addr
, errno
, US
"Unable to %s file for %s transport "
1913 "to return message: %s", error
, tp
->name
, strerror(errno
));
1918 /* Create the pipe for inter-process communication. */
1922 common_error(TRUE
, addr
, ERRNO_PIPEFAIL
, US
"Creation of pipe failed: %s",
1927 /* Now fork the process to do the real work in the subprocess, but first
1928 ensure that all cached resources are freed so that the subprocess starts with
1929 a clean slate and doesn't interfere with the parent process. */
1933 if ((pid
= fork()) == 0)
1935 BOOL replicate
= TRUE
;
1937 /* Prevent core dumps, as we don't want them in users' home directories.
1938 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
1939 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
1940 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
1941 complain if the error is "not supported".
1943 There are two scenarios where changing the max limit has an effect. In one,
1944 the user is using a .forward and invoking a command of their choice via pipe;
1945 for these, we do need the max limit to be 0 unless the admin chooses to
1946 permit an increased limit. In the other, the command is invoked directly by
1947 the transport and is under administrator control, thus being able to raise
1948 the limit aids in debugging. So there's no general always-right answer.
1950 Thus we inhibit core-dumps completely but let individual transports, while
1951 still root, re-raise the limits back up to aid debugging. We make the
1952 default be no core-dumps -- few enough people can use core dumps in
1953 diagnosis that it's reasonable to make them something that has to be explicitly requested.
1960 if (setrlimit(RLIMIT_CORE
, &rl
) < 0)
1962 # ifdef SETRLIMIT_NOT_SUPPORTED
1963 if (errno
!= ENOSYS
&& errno
!= ENOTSUP
)
1965 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_CORE) failed: %s",
1970 /* Reset the random number generator, so different processes don't all
1971 have the same sequence. */
1975 /* If the transport has a setup entry, call this first, while still
1976 privileged. (Appendfile uses this to expand quota, for example, while
1977 able to read private files.) */
1979 if (addr
->transport
->setup
!= NULL
)
1981 switch((addr
->transport
->setup
)(addr
->transport
, addr
, NULL
, uid
, gid
,
1985 addr
->transport_return
= DEFER
;
1989 addr
->transport_return
= PANIC
;
1994 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
1995 when the process becomes unprivileged, it won't be able to write to the
1996 process log. SIGHUP is ignored throughout exim, except when it is being
1999 signal(SIGINT
, SIG_IGN
);
2000 signal(SIGTERM
, SIG_IGN
);
2001 signal(SIGUSR1
, SIG_IGN
);
2003 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2004 half - for transports that exec things (e.g. pipe). Then set the required
2007 (void)close(pfd
[pipe_read
]);
2008 (void)fcntl(pfd
[pipe_write
], F_SETFD
, fcntl(pfd
[pipe_write
], F_GETFD
) |
2010 exim_setugid(uid
, gid
, use_initgroups
,
2011 string_sprintf("local delivery to %s <%s> transport=%s", addr
->local_part
,
2012 addr
->address
, addr
->transport
->name
));
2016 address_item
*batched
;
2017 debug_printf(" home=%s current=%s\n", deliver_home
, working_directory
);
2018 for (batched
= addr
->next
; batched
!= NULL
; batched
= batched
->next
)
2019 debug_printf("additional batched address: %s\n", batched
->address
);
2022 /* Set an appropriate working directory. */
2024 if (Uchdir(working_directory
) < 0)
2026 addr
->transport_return
= DEFER
;
2027 addr
->basic_errno
= errno
;
2028 addr
->message
= string_sprintf("failed to chdir to %s", working_directory
);
2031 /* If successful, call the transport */
2036 set_process_info("delivering %s to %s using %s", message_id
,
2037 addr
->local_part
, addr
->transport
->name
);
2039 /* Setting this global in the subprocess means we need never clear it */
2040 transport_name
= addr
->transport
->name
;
2042 /* If a transport filter has been specified, set up its argument list.
2043 Any errors will get put into the address, and FALSE yielded. */
2045 if (addr
->transport
->filter_command
!= NULL
)
2047 ok
= transport_set_up_command(&transport_filter_argv
,
2048 addr
->transport
->filter_command
,
2049 TRUE
, PANIC
, addr
, US
"transport filter", NULL
);
2050 transport_filter_timeout
= addr
->transport
->filter_timeout
;
2052 else transport_filter_argv
= NULL
;
2056 debug_print_string(addr
->transport
->debug_string
);
2057 replicate
= !(addr
->transport
->info
->code
)(addr
->transport
, addr
);
2061 /* Pass the results back down the pipe. If necessary, first replicate the
2062 status in the top address to the others in the batch. The label is the
2063 subject of a goto when a call to the transport's setup function fails. We
2064 pass the pointer to the transport back in case it got changed as a result of
2065 file_format in appendfile. */
2069 if (replicate
) replicate_status(addr
);
2070 for (addr2
= addr
; addr2
!= NULL
; addr2
= addr2
->next
)
2073 int local_part_length
= Ustrlen(addr2
->local_part
);
2077 if( (ret
= write(pfd
[pipe_write
], (void *)&(addr2
->transport_return
), sizeof(int))) != sizeof(int)
2078 || (ret
= write(pfd
[pipe_write
], (void *)&transport_count
, sizeof(transport_count
))) != sizeof(transport_count
)
2079 || (ret
= write(pfd
[pipe_write
], (void *)&(addr2
->flags
), sizeof(addr2
->flags
))) != sizeof(addr2
->flags
)
2080 || (ret
= write(pfd
[pipe_write
], (void *)&(addr2
->basic_errno
), sizeof(int))) != sizeof(int)
2081 || (ret
= write(pfd
[pipe_write
], (void *)&(addr2
->more_errno
), sizeof(int))) != sizeof(int)
2082 || (ret
= write(pfd
[pipe_write
], (void *)&(addr2
->special_action
), sizeof(int))) != sizeof(int)
2083 || (ret
= write(pfd
[pipe_write
], (void *)&(addr2
->transport
),
2084 sizeof(transport_instance
*))) != sizeof(transport_instance
*)
2086 /* For a file delivery, pass back the local part, in case the original
2087 was only part of the final delivery path. This gives more complete
2090 || (testflag(addr2
, af_file
)
2091 && ( (ret
= write(pfd
[pipe_write
], (void *)&local_part_length
, sizeof(int))) != sizeof(int)
2092 || (ret
= write(pfd
[pipe_write
], addr2
->local_part
, local_part_length
)) != local_part_length
2096 log_write(0, LOG_MAIN
|LOG_PANIC
, "Failed writing transport results to pipe: %s\n",
2097 ret
== -1 ? strerror(errno
) : "short write");
2099 /* Now any messages */
2101 for (i
= 0, s
= addr2
->message
; i
< 2; i
++, s
= addr2
->user_message
)
2103 int message_length
= (s
== NULL
)? 0 : Ustrlen(s
) + 1;
2104 if( (ret
= write(pfd
[pipe_write
], (void *)&message_length
, sizeof(int))) != sizeof(int)
2105 || (message_length
> 0 && (ret
= write(pfd
[pipe_write
], s
, message_length
)) != message_length
)
2107 log_write(0, LOG_MAIN
|LOG_PANIC
, "Failed writing transport results to pipe: %s\n",
2108 ret
== -1 ? strerror(errno
) : "short write");
2112 /* OK, this process is now done. Free any cached resources that it opened,
2113 and close the pipe we were writing down before exiting. */
2115 (void)close(pfd
[pipe_write
]);
2120 /* Back in the main process: panic if the fork did not succeed. This seems
2121 better than returning an error - if forking is failing it is probably best
2122 not to try other deliveries for this message. */
2125 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Fork failed for local delivery to %s",
2128 /* Read the pipe to get the delivery status codes and error messages. Our copy
2129 of the writing end must be closed first, as otherwise read() won't return zero
2130 on an empty pipe. We check that a status exists for each address before
2131 overwriting the address structure. If data is missing, the default DEFER status
2132 will remain. Afterwards, close the reading end. */
2134 (void)close(pfd
[pipe_write
]);
2136 for (addr2
= addr
; addr2
!= NULL
; addr2
= addr2
->next
)
2138 len
= read(pfd
[pipe_read
], (void *)&status
, sizeof(int));
2144 addr2
->transport_return
= status
;
2145 len
= read(pfd
[pipe_read
], (void *)&transport_count
,
2146 sizeof(transport_count
));
2147 len
= read(pfd
[pipe_read
], (void *)&(addr2
->flags
), sizeof(addr2
->flags
));
2148 len
= read(pfd
[pipe_read
], (void *)&(addr2
->basic_errno
), sizeof(int));
2149 len
= read(pfd
[pipe_read
], (void *)&(addr2
->more_errno
), sizeof(int));
2150 len
= read(pfd
[pipe_read
], (void *)&(addr2
->special_action
), sizeof(int));
2151 len
= read(pfd
[pipe_read
], (void *)&(addr2
->transport
),
2152 sizeof(transport_instance
*));
2154 if (testflag(addr2
, af_file
))
2156 int local_part_length
;
2157 len
= read(pfd
[pipe_read
], (void *)&local_part_length
, sizeof(int));
2158 len
= read(pfd
[pipe_read
], (void *)big_buffer
, local_part_length
);
2159 big_buffer
[local_part_length
] = 0;
2160 addr2
->local_part
= string_copy(big_buffer
);
2163 for (i
= 0, sptr
= &(addr2
->message
); i
< 2;
2164 i
++, sptr
= &(addr2
->user_message
))
2167 len
= read(pfd
[pipe_read
], (void *)&message_length
, sizeof(int));
2168 if (message_length
> 0)
2170 len
= read(pfd
[pipe_read
], (void *)big_buffer
, message_length
);
2171 if (len
> 0) *sptr
= string_copy(big_buffer
);
2178 log_write(0, LOG_MAIN
|LOG_PANIC
, "failed to read delivery status for %s "
2179 "from delivery subprocess", addr2
->unique
);
2184 (void)close(pfd
[pipe_read
]);
2186 /* Unless shadowing, write all successful addresses immediately to the journal
2187 file, to ensure they are recorded asap. For homonymic addresses, use the base
2188 address plus the transport name. Failure to write the journal is panic-worthy,
2189 but don't stop, as it may prove possible subsequently to update the spool file
2190 in order to record the delivery. */
2194 for (addr2
= addr
; addr2
!= NULL
; addr2
= addr2
->next
)
2196 if (addr2
->transport_return
!= OK
) continue;
2198 if (testflag(addr2
, af_homonym
))
2199 sprintf(CS big_buffer
, "%.500s/%s\n", addr2
->unique
+ 3, tp
->name
);
2201 sprintf(CS big_buffer
, "%.500s\n", addr2
->unique
);
2203 /* In the test harness, wait just a bit to let the subprocess finish off
2204 any debug output etc first. */
2206 if (running_in_test_harness
) millisleep(300);
2208 DEBUG(D_deliver
) debug_printf("journalling %s", big_buffer
);
2209 len
= Ustrlen(big_buffer
);
2210 if (write(journal_fd
, big_buffer
, len
) != len
)
2211 log_write(0, LOG_MAIN
|LOG_PANIC
, "failed to update journal for %s: %s",
2212 big_buffer
, strerror(errno
));
2215 /* Ensure the journal file is pushed out to disk. */
2217 if (EXIMfsync(journal_fd
) < 0)
2218 log_write(0, LOG_MAIN
|LOG_PANIC
, "failed to fsync journal: %s",
2222 /* Wait for the process to finish. If it terminates with a non-zero code,
2223 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2224 status values of all the addresses as they are. Take care to handle the case
2225 when the subprocess doesn't seem to exist. This has been seen on one system
2226 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2227 happens, wait() doesn't recognize the termination of child processes. Exim now
2228 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2230 while ((rc
= wait(&status
)) != pid
)
2232 if (rc
< 0 && errno
== ECHILD
) /* Process has vanished */
2234 log_write(0, LOG_MAIN
, "%s transport process vanished unexpectedly",
2235 addr
->transport
->driver_name
);
2241 if ((status
& 0xffff) != 0)
2243 int msb
= (status
>> 8) & 255;
2244 int lsb
= status
& 255;
2245 int code
= (msb
== 0)? (lsb
& 0x7f) : msb
;
2246 if (msb
!= 0 || (code
!= SIGTERM
&& code
!= SIGKILL
&& code
!= SIGQUIT
))
2247 addr
->special_action
= SPECIAL_FREEZE
;
2248 log_write(0, LOG_MAIN
|LOG_PANIC
, "%s transport process returned non-zero "
2249 "status 0x%04x: %s %d",
2250 addr
->transport
->driver_name
,
2252 (msb
== 0)? "terminated by signal" : "exit code",
2256 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2258 if (addr
->special_action
== SPECIAL_WARN
&&
2259 addr
->transport
->warn_message
!= NULL
)
2262 uschar
*warn_message
;
2264 DEBUG(D_deliver
) debug_printf("Warning message requested by transport\n");
2266 warn_message
= expand_string(addr
->transport
->warn_message
);
2267 if (warn_message
== NULL
)
2268 log_write(0, LOG_MAIN
|LOG_PANIC
, "Failed to expand \"%s\" (warning "
2269 "message for %s transport): %s", addr
->transport
->warn_message
,
2270 addr
->transport
->name
, expand_string_message
);
2273 pid_t pid
= child_open_exim(&fd
);
2276 FILE *f
= fdopen(fd
, "wb");
2277 if (errors_reply_to
!= NULL
&&
2278 !contains_header(US
"Reply-To", warn_message
))
2279 fprintf(f
, "Reply-To: %s\n", errors_reply_to
);
2280 fprintf(f
, "Auto-Submitted: auto-replied\n");
2281 if (!contains_header(US
"From", warn_message
)) moan_write_from(f
);
2282 fprintf(f
, "%s", CS warn_message
);
2284 /* Close and wait for child process to complete, without a timeout. */
2287 (void)child_close(pid
, 0);
2291 addr
->special_action
= SPECIAL_NONE
;
2297 /*************************************************
2298 * Do local deliveries *
2299 *************************************************/
2301 /* This function processes the list of addresses in addr_local. True local
2302 deliveries are always done one address at a time. However, local deliveries can
2303 be batched up in some cases. Typically this is when writing batched SMTP output
2304 files for use by some external transport mechanism, or when running local
2305 deliveries over LMTP.
2312 do_local_deliveries(void)
2315 open_db
*dbm_file
= NULL
;
2316 time_t now
= time(NULL
);
2318 /* Loop until we have exhausted the supply of local deliveries */
2320 while (addr_local
!= NULL
)
2322 time_t delivery_start
;
2324 address_item
*addr2
, *addr3
, *nextaddr
;
2325 int logflags
= LOG_MAIN
;
2326 int logchar
= dont_deliver
? '*' : '=';
2327 transport_instance
*tp
;
2329 /* Pick the first undelivered address off the chain */
2331 address_item
*addr
= addr_local
;
2332 addr_local
= addr
->next
;
2335 DEBUG(D_deliver
|D_transport
)
2336 debug_printf("--------> %s <--------\n", addr
->address
);
2338 /* An internal disaster if there is no transport. Should not occur! */
2340 if ((tp
= addr
->transport
) == NULL
)
2342 logflags
|= LOG_PANIC
;
2343 disable_logging
= FALSE
; /* Jic */
2345 (addr
->router
!= NULL
)?
2346 string_sprintf("No transport set by %s router", addr
->router
->name
)
2348 string_sprintf("No transport set by system filter");
2349 post_process_one(addr
, DEFER
, logflags
, DTYPE_TRANSPORT
, 0);
2353 /* Check that this base address hasn't previously been delivered to this
2354 transport. The check is necessary at this point to handle homonymic addresses
2355 correctly in cases where the pattern of redirection changes between delivery
2356 attempts. Non-homonymic previous delivery is detected earlier, at routing
2359 if (previously_transported(addr
, FALSE
)) continue;
2361 /* There are weird cases where logging is disabled */
2363 disable_logging
= tp
->disable_logging
;
2365 /* Check for batched addresses and possible amalgamation. Skip all the work
2366 if either batch_max <= 1 or there aren't any other addresses for local
2369 if (tp
->batch_max
> 1 && addr_local
!= NULL
)
2371 int batch_count
= 1;
2372 BOOL uses_dom
= readconf_depends((driver_instance
*)tp
, US
"domain");
2373 BOOL uses_lp
= (testflag(addr
, af_pfr
) &&
2374 (testflag(addr
, af_file
) || addr
->local_part
[0] == '|')) ||
2375 readconf_depends((driver_instance
*)tp
, US
"local_part");
2376 uschar
*batch_id
= NULL
;
2377 address_item
**anchor
= &addr_local
;
2378 address_item
*last
= addr
;
2381 /* Expand the batch_id string for comparison with other addresses.
2382 Expansion failure suppresses batching. */
2384 if (tp
->batch_id
!= NULL
)
2386 deliver_set_expansions(addr
);
2387 batch_id
= expand_string(tp
->batch_id
);
2388 deliver_set_expansions(NULL
);
2389 if (batch_id
== NULL
)
2391 log_write(0, LOG_MAIN
|LOG_PANIC
, "Failed to expand batch_id option "
2392 "in %s transport (%s): %s", tp
->name
, addr
->address
,
2393 expand_string_message
);
2394 batch_count
= tp
->batch_max
;
2398 /* Until we reach the batch_max limit, pick off addresses which have the
2399 same characteristics. These are:
2402 not previously delivered (see comment about 50 lines above)
2403 same local part if the transport's configuration contains $local_part
2404 or if this is a file or pipe delivery from a redirection
2405 same domain if the transport's configuration contains $domain
2407 same additional headers
2408 same headers to be removed
2409 same uid/gid for running the transport
2410 same first host if a host list is set
2413 while ((next
= *anchor
) != NULL
&& batch_count
< tp
->batch_max
)
2416 tp
== next
->transport
&&
2417 !previously_transported(next
, TRUE
) &&
2418 (addr
->flags
& (af_pfr
|af_file
)) == (next
->flags
& (af_pfr
|af_file
)) &&
2419 (!uses_lp
|| Ustrcmp(next
->local_part
, addr
->local_part
) == 0) &&
2420 (!uses_dom
|| Ustrcmp(next
->domain
, addr
->domain
) == 0) &&
2421 same_strings(next
->p
.errors_address
, addr
->p
.errors_address
) &&
2422 same_headers(next
->p
.extra_headers
, addr
->p
.extra_headers
) &&
2423 same_strings(next
->p
.remove_headers
, addr
->p
.remove_headers
) &&
2424 same_ugid(tp
, addr
, next
) &&
2425 ((addr
->host_list
== NULL
&& next
->host_list
== NULL
) ||
2426 (addr
->host_list
!= NULL
&& next
->host_list
!= NULL
&&
2427 Ustrcmp(addr
->host_list
->name
, next
->host_list
->name
) == 0));
2429 /* If the transport has a batch_id setting, batch_id will be non-NULL
2430 from the expansion outside the loop. Expand for this address and compare.
2431 Expansion failure makes this address ineligible for batching. */
2433 if (ok
&& batch_id
!= NULL
)
2436 address_item
*save_nextnext
= next
->next
;
2437 next
->next
= NULL
; /* Expansion for a single address */
2438 deliver_set_expansions(next
);
2439 next
->next
= save_nextnext
;
2440 bid
= expand_string(tp
->batch_id
);
2441 deliver_set_expansions(NULL
);
2444 log_write(0, LOG_MAIN
|LOG_PANIC
, "Failed to expand batch_id option "
2445 "in %s transport (%s): %s", tp
->name
, next
->address
,
2446 expand_string_message
);
2449 else ok
= (Ustrcmp(batch_id
, bid
) == 0);
2452 /* Take address into batch if OK. */
2456 *anchor
= next
->next
; /* Include the address */
2462 else anchor
= &(next
->next
); /* Skip the address */
2466 /* We now have one or more addresses that can be delivered in a batch. Check
2467 whether the transport is prepared to accept a message of this size. If not,
2468 fail them all forthwith. If the expansion fails, or does not yield an
2469 integer, defer delivery. */
2471 if (tp
->message_size_limit
!= NULL
)
2473 int rc
= check_message_size(tp
, addr
);
2476 replicate_status(addr
);
2477 while (addr
!= NULL
)
2480 post_process_one(addr
, rc
, logflags
, DTYPE_TRANSPORT
, 0);
2483 continue; /* With next batch of addresses */
2487 /* If we are not running the queue, or if forcing, all deliveries will be
2488 attempted. Otherwise, we must respect the retry times for each address. Even
2489 when not doing this, we need to set up the retry key string, and determine
2490 whether a retry record exists, because after a successful delivery, a delete
2491 retry item must be set up. Keep the retry database open only for the duration
2492 of these checks, rather than for all local deliveries, because some local
2493 deliveries (e.g. to pipes) can take a substantial time. */
2495 dbm_file
= dbfn_open(US
"retry", O_RDONLY
, &dbblock
, FALSE
);
2496 if (dbm_file
== NULL
)
2498 DEBUG(D_deliver
|D_retry
|D_hints_lookup
)
2499 debug_printf("no retry data available\n");
2504 while (addr2
!= NULL
)
2506 BOOL ok
= TRUE
; /* to deliver this address */
2509 /* Set up the retry key to include the domain or not, and change its
2510 leading character from "R" to "T". Must make a copy before doing this,
2511 because the old key may be pointed to from a "delete" retry item after
2514 retry_key
= string_copy(
2515 (tp
->retry_use_local_part
)? addr2
->address_retry_key
:
2516 addr2
->domain_retry_key
);
2519 /* Inspect the retry data. If there is no hints file, delivery happens. */
2521 if (dbm_file
!= NULL
)
2523 dbdata_retry
*retry_record
= dbfn_read(dbm_file
, retry_key
);
2525 /* If there is no retry record, delivery happens. If there is,
2526 remember it exists so it can be deleted after a successful delivery. */
2528 if (retry_record
!= NULL
)
2530 setflag(addr2
, af_lt_retry_exists
);
2532 /* A retry record exists for this address. If queue running and not
2533 forcing, inspect its contents. If the record is too old, or if its
2534 retry time has come, or if it has passed its cutoff time, delivery
2539 debug_printf("retry record exists: age=%s ",
2540 readconf_printtime(now
- retry_record
->time_stamp
));
2541 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire
));
2542 debug_printf(" time to retry = %s expired = %d\n",
2543 readconf_printtime(retry_record
->next_try
- now
),
2544 retry_record
->expired
);
2547 if (queue_running
&& !deliver_force
)
2549 ok
= (now
- retry_record
->time_stamp
> retry_data_expire
) ||
2550 (now
>= retry_record
->next_try
) ||
2551 retry_record
->expired
;
2553 /* If we haven't reached the retry time, there is one more check
2554 to do, which is for the ultimate address timeout. */
2557 ok
= retry_ultimate_address_timeout(retry_key
, addr2
->domain
,
2561 else DEBUG(D_retry
) debug_printf("no retry record exists\n");
2564 /* This address is to be delivered. Leave it on the chain. */
2569 addr2
= addr2
->next
;
2572 /* This address is to be deferred. Take it out of the chain, and
2573 post-process it as complete. Must take it out of the chain first,
2574 because post processing puts it on another chain. */
2578 address_item
*this = addr2
;
2579 this->message
= US
"Retry time not yet reached";
2580 this->basic_errno
= ERRNO_LRETRY
;
2581 if (addr3
== NULL
) addr2
= addr
= addr2
->next
;
2582 else addr2
= addr3
->next
= addr2
->next
;
2583 post_process_one(this, DEFER
, logflags
, DTYPE_TRANSPORT
, 0);
2587 if (dbm_file
!= NULL
) dbfn_close(dbm_file
);
2589 /* If there are no addresses left on the chain, they all deferred. Loop
2590 for the next set of addresses. */
2592 if (addr
== NULL
) continue;
2594 /* So, finally, we do have some addresses that can be passed to the
2595 transport. Before doing so, set up variables that are relevant to a
2598 deliver_set_expansions(addr
);
2599 delivery_start
= time(NULL
);
2600 deliver_local(addr
, FALSE
);
2601 deliver_time
= (int)(time(NULL
) - delivery_start
);
2603 /* If a shadow transport (which must perforce be another local transport), is
2604 defined, and its condition is met, we must pass the message to the shadow
2605 too, but only those addresses that succeeded. We do this by making a new
2606 chain of addresses - also to keep the original chain uncontaminated. We must
2607 use a chain rather than doing it one by one, because the shadow transport may
2610 NOTE: if the condition fails because of a lookup defer, there is nothing we
2613 if (tp
->shadow
!= NULL
&&
2614 (tp
->shadow_condition
== NULL
||
2615 expand_check_condition(tp
->shadow_condition
, tp
->name
, US
"transport")))
2617 transport_instance
*stp
;
2618 address_item
*shadow_addr
= NULL
;
2619 address_item
**last
= &shadow_addr
;
2621 for (stp
= transports
; stp
!= NULL
; stp
= stp
->next
)
2622 if (Ustrcmp(stp
->name
, tp
->shadow
) == 0) break;
2625 log_write(0, LOG_MAIN
|LOG_PANIC
, "shadow transport \"%s\" not found ",
2628 /* Pick off the addresses that have succeeded, and make clones. Put into
2629 the shadow_message field a pointer to the shadow_message field of the real
2632 else for (addr2
= addr
; addr2
!= NULL
; addr2
= addr2
->next
)
2634 if (addr2
->transport_return
!= OK
) continue;
2635 addr3
= store_get(sizeof(address_item
));
2638 addr3
->shadow_message
= (uschar
*)(&(addr2
->shadow_message
));
2639 addr3
->transport
= stp
;
2640 addr3
->transport_return
= DEFER
;
2641 addr3
->return_filename
= NULL
;
2642 addr3
->return_file
= -1;
2644 last
= &(addr3
->next
);
2647 /* If we found any addresses to shadow, run the delivery, and stick any
2648 message back into the shadow_message field in the original. */
2650 if (shadow_addr
!= NULL
)
2652 int save_count
= transport_count
;
2654 DEBUG(D_deliver
|D_transport
)
2655 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2656 deliver_local(shadow_addr
, TRUE
);
2658 for(; shadow_addr
!= NULL
; shadow_addr
= shadow_addr
->next
)
2660 int sresult
= shadow_addr
->transport_return
;
2661 *((uschar
**)(shadow_addr
->shadow_message
)) = (sresult
== OK
)?
2662 string_sprintf(" ST=%s", stp
->name
) :
2663 string_sprintf(" ST=%s (%s%s%s)", stp
->name
,
2664 (shadow_addr
->basic_errno
<= 0)?
2665 US
"" : US
strerror(shadow_addr
->basic_errno
),
2666 (shadow_addr
->basic_errno
<= 0 || shadow_addr
->message
== NULL
)?
2668 (shadow_addr
->message
!= NULL
)? shadow_addr
->message
:
2669 (shadow_addr
->basic_errno
<= 0)? US
"unknown error" : US
"");
2671 DEBUG(D_deliver
|D_transport
)
2672 debug_printf("%s shadow transport returned %s for %s\n",
2674 (sresult
== OK
)? "OK" :
2675 (sresult
== DEFER
)? "DEFER" :
2676 (sresult
== FAIL
)? "FAIL" :
2677 (sresult
== PANIC
)? "PANIC" : "?",
2678 shadow_addr
->address
);
2681 DEBUG(D_deliver
|D_transport
)
2682 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2684 transport_count
= save_count
; /* Restore original transport count */
2688 /* Cancel the expansions that were set up for the delivery. */
2690 deliver_set_expansions(NULL
);
2692 /* Now we can process the results of the real transport. We must take each
2693 address off the chain first, because post_process_one() puts it on another
2696 for (addr2
= addr
; addr2
!= NULL
; addr2
= nextaddr
)
2698 int result
= addr2
->transport_return
;
2699 nextaddr
= addr2
->next
;
2701 DEBUG(D_deliver
|D_transport
)
2702 debug_printf("%s transport returned %s for %s\n",
2704 (result
== OK
)? "OK" :
2705 (result
== DEFER
)? "DEFER" :
2706 (result
== FAIL
)? "FAIL" :
2707 (result
== PANIC
)? "PANIC" : "?",
2710 /* If there is a retry_record, or if delivery is deferred, build a retry
2711 item for setting a new retry time or deleting the old retry record from
2712 the database. These items are handled all together after all addresses
2713 have been handled (so the database is open just for a short time for
2716 if (result
== DEFER
|| testflag(addr2
, af_lt_retry_exists
))
2718 int flags
= (result
== DEFER
)? 0 : rf_delete
;
2719 uschar
*retry_key
= string_copy((tp
->retry_use_local_part
)?
2720 addr2
->address_retry_key
: addr2
->domain_retry_key
);
2722 retry_add_item(addr2
, retry_key
, flags
);
2725 /* Done with this address */
2727 if (result
== OK
) addr2
->more_errno
= deliver_time
;
2728 post_process_one(addr2
, result
, logflags
, DTYPE_TRANSPORT
, logchar
);
2730 /* If a pipe delivery generated text to be sent back, the result may be
2731 changed to FAIL, and we must copy this for subsequent addresses in the
2734 if (addr2
->transport_return
!= result
)
2736 for (addr3
= nextaddr
; addr3
!= NULL
; addr3
= addr3
->next
)
2738 addr3
->transport_return
= addr2
->transport_return
;
2739 addr3
->basic_errno
= addr2
->basic_errno
;
2740 addr3
->message
= addr2
->message
;
2742 result
= addr2
->transport_return
;
2745 /* Whether or not the result was changed to FAIL, we need to copy the
2746 return_file value from the first address into all the addresses of the
2747 batch, so they are all listed in the error message. */
2749 addr2
->return_file
= addr
->return_file
;
2751 /* Change log character for recording successful deliveries. */
2753 if (result
== OK
) logchar
= '-';
2755 } /* Loop back for next batch of addresses */
2761 /*************************************************
2762 * Sort remote deliveries *
2763 *************************************************/
2765 /* This function is called if remote_sort_domains is set. It arranges that the
2766 chain of addresses for remote deliveries is ordered according to the strings
2767 specified. Try to make this shuffling reasonably efficient by handling
2768 sequences of addresses rather than just single ones.
2775 sort_remote_deliveries(void)
2778 address_item
**aptr
= &addr_remote
;
2779 uschar
*listptr
= remote_sort_domains
;
2783 while (*aptr
!= NULL
&&
2784 (pattern
= string_nextinlist(&listptr
, &sep
, patbuf
, sizeof(patbuf
)))
2787 address_item
*moved
= NULL
;
2788 address_item
**bptr
= &moved
;
2790 while (*aptr
!= NULL
)
2792 address_item
**next
;
2793 deliver_domain
= (*aptr
)->domain
; /* set $domain */
2794 if (match_isinlist(deliver_domain
, &pattern
, UCHAR_MAX
+1,
2795 &domainlist_anchor
, NULL
, MCL_DOMAIN
, TRUE
, NULL
) == OK
)
2797 aptr
= &((*aptr
)->next
);
2801 next
= &((*aptr
)->next
);
2802 while (*next
!= NULL
&&
2803 (deliver_domain
= (*next
)->domain
, /* Set $domain */
2804 match_isinlist(deliver_domain
, &pattern
, UCHAR_MAX
+1,
2805 &domainlist_anchor
, NULL
, MCL_DOMAIN
, TRUE
, NULL
)) != OK
)
2806 next
= &((*next
)->next
);
2808 /* If the batch of non-matchers is at the end, add on any that were
2809 extracted further up the chain, and end this iteration. Otherwise,
2810 extract them from the chain and hang on the moved chain. */
2822 aptr
= &((*aptr
)->next
);
2825 /* If the loop ended because the final address matched, *aptr will
2826 be NULL. Add on to the end any extracted non-matching addresses. If
2827 *aptr is not NULL, the loop ended via "break" when *next is null, that
2828 is, there was a string of non-matching addresses at the end. In this
2829 case the extracted addresses have already been added on the end. */
2831 if (*aptr
== NULL
) *aptr
= moved
;
2837 debug_printf("remote addresses after sorting:\n");
2838 for (addr
= addr_remote
; addr
!= NULL
; addr
= addr
->next
)
2839 debug_printf(" %s\n", addr
->address
);
2845 /*************************************************
2846 * Read from pipe for remote delivery subprocess *
2847 *************************************************/
2849 /* This function is called when the subprocess is complete, but can also be
2850 called before it is complete, in order to empty a pipe that is full (to prevent
2851 deadlock). It must therefore keep track of its progress in the parlist data
2854 We read the pipe to get the delivery status codes and a possible error message
2855 for each address, optionally preceded by unusability data for the hosts and
2856 also by optional retry data.
2858 Read in large chunks into the big buffer and then scan through, interpreting
2859 the data therein. In most cases, only a single read will be necessary. No
2860 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
2861 that we read the next chunk when there is less than 2500 bytes left in the
2862 non-final chunk, we can assume each item is complete in the buffer before
2863 handling it. Each item is written using a single write(), which is atomic for
2864 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
2865 often bigger) so even if we are reading while the subprocess is still going, we
2866 should never have only a partial item in the buffer.
2869 poffset the offset of the parlist item
2870 eop TRUE if the process has completed
2872 Returns: TRUE if the terminating 'Z' item has been read,
2873 or there has been a disaster (i.e. no more data needed);
2878 par_read_pipe(int poffset
, BOOL eop
)
2881 pardata
*p
= parlist
+ poffset
;
2882 address_item
*addrlist
= p
->addrlist
;
2883 address_item
*addr
= p
->addr
;
2886 uschar
*endptr
= big_buffer
;
2887 uschar
*ptr
= endptr
;
2888 uschar
*msg
= p
->msg
;
2889 BOOL done
= p
->done
;
2890 BOOL unfinished
= TRUE
;
2891 /* minimum size to read is header size including id, subid and length */
2892 int required
= PIPE_HEADER_SIZE
;
2894 /* Loop through all items, reading from the pipe when necessary. The pipe
2895 is set up to be non-blocking, but there are two different Unix mechanisms in
2896 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
2897 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
2898 which returns 0 for both end of file and no more data. We distinguish the
2899 two cases by taking 0 as end of file only when we know the process has
2902 Each separate item is written to the pipe in a single write(), and as they are
2903 all short items, the writes will all be atomic and we should never find
2904 ourselves in the position of having read an incomplete item. "Short" in this
2905 case can mean up to about 1K in the case when there is a long error message
2906 associated with an address. */
2908 DEBUG(D_deliver
) debug_printf("reading pipe for subprocess %d (%s)\n",
2909 (int)p
->pid
, eop
? "ended" : "not ended");
2913 retry_item
*r
, **rp
;
2914 int remaining
= endptr
- ptr
;
2915 uschar header
[PIPE_HEADER_SIZE
+ 1];
2919 /* Read (first time) or top up the chars in the buffer if necessary.
2920 There will be only one read if we get all the available data (i.e. don't
2921 fill the buffer completely). */
2923 if (remaining
< required
&& unfinished
)
2926 int available
= big_buffer_size
- remaining
;
2928 if (remaining
> 0) memmove(big_buffer
, ptr
, remaining
);
2931 endptr
= big_buffer
+ remaining
;
2932 len
= read(fd
, endptr
, available
);
2934 DEBUG(D_deliver
) debug_printf("read() yielded %d\n", len
);
2936 /* If the result is EAGAIN and the process is not complete, just
2937 stop reading any more and process what we have already. */
2941 if (!eop
&& errno
== EAGAIN
) len
= 0; else
2943 msg
= string_sprintf("failed to read pipe from transport process "
2944 "%d for transport %s: %s", pid
, addr
->transport
->driver_name
,
2950 /* If the length is zero (eof or no-more-data), just process what we
2951 already have. Note that if the process is still running and we have
2952 read all the data in the pipe (but less that "available") then we
2953 won't read any more, as "unfinished" will get set FALSE. */
2957 unfinished
= len
== available
;
2960 /* If we are at the end of the available data, exit the loop. */
2961 if (ptr
>= endptr
) break;
2963 /* copy and read header */
2964 memcpy(header
, ptr
, PIPE_HEADER_SIZE
);
2965 header
[PIPE_HEADER_SIZE
] = '\0';
2968 required
= Ustrtol(header
+ 2, &endc
, 10) + PIPE_HEADER_SIZE
; /* header + data */
2971 msg
= string_sprintf("failed to read pipe from transport process "
2972 "%d for transport %s: error reading size from header", pid
, addr
->transport
->driver_name
);
2978 debug_printf("header read id:%c,subid:%c,size:%s,required:%d,remaining:%d,unfinished:%d\n",
2979 id
, subid
, header
+2, required
, remaining
, unfinished
);
2981 /* is there room for the dataset we want to read ? */
2982 if (required
> big_buffer_size
- PIPE_HEADER_SIZE
)
2984 msg
= string_sprintf("failed to read pipe from transport process "
2985 "%d for transport %s: big_buffer too small! required size=%d buffer size=%d", pid
, addr
->transport
->driver_name
,
2986 required
, big_buffer_size
- PIPE_HEADER_SIZE
);
2991 /* we wrote all datasets with atomic write() calls
2992 remaining < required only happens if big_buffer was too small
2993 to get all available data from pipe. unfinished has to be true
2995 if (remaining
< required
)
2999 msg
= string_sprintf("failed to read pipe from transport process "
3000 "%d for transport %s: required size=%d > remaining size=%d and unfinished=false",
3001 pid
, addr
->transport
->driver_name
, required
, remaining
);
3006 /* step behind the header */
3007 ptr
+= PIPE_HEADER_SIZE
;
3009 /* Handle each possible type of item, assuming the complete item is
3010 available in store. */
3014 /* Host items exist only if any hosts were marked unusable. Match
3015 up by checking the IP address. */
3018 for (h
= addrlist
->host_list
; h
!= NULL
; h
= h
->next
)
3020 if (h
->address
== NULL
|| Ustrcmp(h
->address
, ptr
+2) != 0) continue;
3028 /* Retry items are sent in a preceding R item for each address. This is
3029 kept separate to keep each message short enough to guarantee it won't
3030 be split in the pipe. Hopefully, in the majority of cases, there won't in
3031 fact be any retry items at all.
3033 The complete set of retry items might include an item to delete a
3034 routing retry if there was a previous routing delay. However, routing
3035 retries are also used when a remote transport identifies an address error.
3036 In that case, there may also be an "add" item for the same key. Arrange
3037 that a "delete" item is dropped in favour of an "add" item. */
3040 if (addr
== NULL
) goto ADDR_MISMATCH
;
3042 DEBUG(D_deliver
|D_retry
)
3043 debug_printf("reading retry information for %s from subprocess\n",
3046 /* Cut out any "delete" items on the list. */
3048 for (rp
= &(addr
->retries
); (r
= *rp
) != NULL
; rp
= &(r
->next
))
3050 if (Ustrcmp(r
->key
, ptr
+1) == 0) /* Found item with same key */
3052 if ((r
->flags
& rf_delete
) == 0) break; /* It was not "delete" */
3053 *rp
= r
->next
; /* Excise a delete item */
3054 DEBUG(D_deliver
|D_retry
)
3055 debug_printf(" existing delete item dropped\n");
3059 /* We want to add a delete item only if there is no non-delete item;
3060 however we still have to step ptr through the data. */
3062 if (r
== NULL
|| (*ptr
& rf_delete
) == 0)
3064 r
= store_get(sizeof(retry_item
));
3065 r
->next
= addr
->retries
;
3068 r
->key
= string_copy(ptr
);
3070 memcpy(&(r
->basic_errno
), ptr
, sizeof(r
->basic_errno
));
3071 ptr
+= sizeof(r
->basic_errno
);
3072 memcpy(&(r
->more_errno
), ptr
, sizeof(r
->more_errno
));
3073 ptr
+= sizeof(r
->more_errno
);
3074 r
->message
= (*ptr
)? string_copy(ptr
) : NULL
;
3075 DEBUG(D_deliver
|D_retry
)
3076 debug_printf(" added %s item\n",
3077 ((r
->flags
& rf_delete
) == 0)? "retry" : "delete");
3082 DEBUG(D_deliver
|D_retry
)
3083 debug_printf(" delete item not added: non-delete item exists\n");
3086 ptr
+= sizeof(r
->basic_errno
) + sizeof(r
->more_errno
);
3092 /* Put the amount of data written into the parlist block */
3095 memcpy(&(p
->transport_count
), ptr
, sizeof(transport_count
));
3096 ptr
+= sizeof(transport_count
);
3099 /* Address items are in the order of items on the address chain. We
3100 remember the current address value in case this function is called
3101 several times to empty the pipe in stages. Information about delivery
3102 over TLS is sent in a preceding X item for each address. We don't put
3103 it in with the other info, in order to keep each message short enough to
3104 guarantee it won't be split in the pipe. */
3108 if (addr
== NULL
) goto ADDR_MISMATCH
; /* Below, in 'A' handler */
3112 addr
->cipher
= NULL
;
3113 addr
->peerdn
= NULL
;
3116 addr
->cipher
= string_copy(ptr
);
3119 addr
->peerdn
= string_copy(ptr
);
3123 addr
->peercert
= NULL
;
3125 (void) tls_import_cert(ptr
, &addr
->peercert
);
3129 addr
->ourcert
= NULL
;
3131 (void) tls_import_cert(ptr
, &addr
->ourcert
);
3134 # ifndef DISABLE_OCSP
3136 addr
->ocsp
= OCSP_NOT_REQ
;
3138 addr
->ocsp
= *ptr
- '0';
3144 #endif /*SUPPORT_TLS*/
3146 case 'C': /* client authenticator information */
3150 addr
->authenticator
= (*ptr
)? string_copy(ptr
) : NULL
;
3153 addr
->auth_id
= (*ptr
)? string_copy(ptr
) : NULL
;
3156 addr
->auth_sndr
= (*ptr
)? string_copy(ptr
) : NULL
;
3162 #ifndef DISABLE_PRDR
3164 addr
->flags
|= af_prdr_used
;
3168 #ifdef EXPERIMENTAL_DSN
3170 if (addr
== NULL
) goto ADDR_MISMATCH
;
3171 memcpy(&(addr
->dsn_aware
), ptr
, sizeof(addr
->dsn_aware
));
3172 ptr
+= sizeof(addr
->dsn_aware
);
3173 DEBUG(D_deliver
) debug_printf("DSN read: addr->dsn_aware = %d\n", addr
->dsn_aware
);
3181 msg
= string_sprintf("address count mismatch for data read from pipe "
3182 "for transport process %d for transport %s", pid
,
3183 addrlist
->transport
->driver_name
);
3188 addr
->transport_return
= *ptr
++;
3189 addr
->special_action
= *ptr
++;
3190 memcpy(&(addr
->basic_errno
), ptr
, sizeof(addr
->basic_errno
));
3191 ptr
+= sizeof(addr
->basic_errno
);
3192 memcpy(&(addr
->more_errno
), ptr
, sizeof(addr
->more_errno
));
3193 ptr
+= sizeof(addr
->more_errno
);
3194 memcpy(&(addr
->flags
), ptr
, sizeof(addr
->flags
));
3195 ptr
+= sizeof(addr
->flags
);
3196 addr
->message
= (*ptr
)? string_copy(ptr
) : NULL
;
3198 addr
->user_message
= (*ptr
)? string_copy(ptr
) : NULL
;
3201 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3205 h
= store_get(sizeof(host_item
));
3206 h
->name
= string_copy(ptr
);
3208 h
->address
= string_copy(ptr
);
3210 memcpy(&(h
->port
), ptr
, sizeof(h
->port
));
3211 ptr
+= sizeof(h
->port
);
3212 h
->dnssec
= *ptr
== '2' ? DS_YES
3213 : *ptr
== '1' ? DS_NO
3216 addr
->host_used
= h
;
3220 /* Finished with this address */
3225 /* Z marks the logical end of the data. It is followed by '0' if
3226 continue_transport was NULL at the end of transporting, otherwise '1'.
3227 We need to know when it becomes NULL during a delivery down a passed SMTP
3228 channel so that we don't try to pass anything more down it. Of course, for
3229 most normal messages it will remain NULL all the time. */
3234 continue_transport
= NULL
;
3235 continue_hostname
= NULL
;
3238 DEBUG(D_deliver
) debug_printf("Z0%c item read\n", *ptr
);
3241 /* Anything else is a disaster. */
3244 msg
= string_sprintf("malformed data (%d) read from pipe for transport "
3245 "process %d for transport %s", ptr
[-1], pid
,
3246 addr
->transport
->driver_name
);
3252 /* The done flag is inspected externally, to determine whether or not to
3253 call the function again when the process finishes. */
3257 /* If the process hadn't finished, and we haven't seen the end of the data
3258 or suffered a disaster, update the rest of the state, and return FALSE to
3259 indicate "not finished". */
3268 /* Close our end of the pipe, to prevent deadlock if the far end is still
3269 pushing stuff into it. */
3274 /* If we have finished without error, but haven't had data for every address,
3275 something is wrong. */
3277 if (msg
== NULL
&& addr
!= NULL
)
3278 msg
= string_sprintf("insufficient address data read from pipe "
3279 "for transport process %d for transport %s", pid
,
3280 addr
->transport
->driver_name
);
3282 /* If an error message is set, something has gone wrong in getting back
3283 the delivery data. Put the message into each address and freeze it. */
3287 for (addr
= addrlist
; addr
!= NULL
; addr
= addr
->next
)
3289 addr
->transport_return
= DEFER
;
3290 addr
->special_action
= SPECIAL_FREEZE
;
3291 addr
->message
= msg
;
3295 /* Return TRUE to indicate we have got all we need from this process, even
3296 if it hasn't actually finished yet. */
3303 /*************************************************
3304 * Post-process a set of remote addresses *
3305 *************************************************/
3307 /* Do what has to be done immediately after a remote delivery for each set of
3308 addresses, then re-write the spool if necessary. Note that post_process_one
3309 puts the address on an appropriate queue; hence we must fish off the next
3310 one first. This function is also called if there is a problem with setting
3311 up a subprocess to do a remote delivery in parallel. In this case, the final
3312 argument contains a message, and the action must be forced to DEFER.
3315 addr pointer to chain of address items
3316 logflags flags for logging
3317 msg NULL for normal cases; -> error message for unexpected problems
3318 fallback TRUE if processing fallback hosts
3324 remote_post_process(address_item
*addr
, int logflags
, uschar
*msg
,
3329 /* If any host addresses were found to be unusable, add them to the unusable
3330 tree so that subsequent deliveries don't try them. */
3332 for (h
= addr
->host_list
; h
!= NULL
; h
= h
->next
)
3334 if (h
->address
== NULL
) continue;
3335 if (h
->status
>= hstatus_unusable
) tree_add_unusable(h
);
3338 /* Now handle each address on the chain. The transport has placed '=' or '-'
3339 into the special_action field for each successful delivery. */
3341 while (addr
!= NULL
)
3343 address_item
*next
= addr
->next
;
3345 /* If msg == NULL (normal processing) and the result is DEFER and we are
3346 processing the main hosts and there are fallback hosts available, put the
3347 address on the list for fallback delivery. */
3349 if (addr
->transport_return
== DEFER
&&
3350 addr
->fallback_hosts
!= NULL
&&
3354 addr
->host_list
= addr
->fallback_hosts
;
3355 addr
->next
= addr_fallback
;
3356 addr_fallback
= addr
;
3357 DEBUG(D_deliver
) debug_printf("%s queued for fallback host(s)\n", addr
->address
);
3360 /* If msg is set (=> unexpected problem), set it in the address before
3361 doing the ordinary post processing. */
3367 addr
->message
= msg
;
3368 addr
->transport_return
= DEFER
;
3370 (void)post_process_one(addr
, addr
->transport_return
, logflags
,
3371 DTYPE_TRANSPORT
, addr
->special_action
);
3379 /* If we have just delivered down a passed SMTP channel, and that was
3380 the last address, the channel will have been closed down. Now that
3381 we have logged that delivery, set continue_sequence to 1 so that
3382 any subsequent deliveries don't get "*" incorrectly logged. */
3384 if (continue_transport
== NULL
) continue_sequence
= 1;
3389 /*************************************************
3390 * Wait for one remote delivery subprocess *
3391 *************************************************/
3393 /* This function is called while doing remote deliveries when either the
3394 maximum number of processes exist and we need one to complete so that another
3395 can be created, or when waiting for the last ones to complete. It must wait for
3396 the completion of one subprocess, empty the control block slot, and return a
3397 pointer to the address chain.
3400 Returns: pointer to the chain of addresses handled by the process;
3401 NULL if no subprocess found - this is an unexpected error
3404 static address_item
*
3407 int poffset
, status
;
3408 address_item
*addr
, *addrlist
;
3411 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3412 "to finish", message_id
);
3414 /* Loop until either a subprocess completes, or there are no subprocesses in
3415 existence - in which case give an error return. We cannot proceed just by
3416 waiting for a completion, because a subprocess may have filled up its pipe, and
3417 be waiting for it to be emptied. Therefore, if no processes have finished, we
3418 wait for one of the pipes to acquire some data by calling select(), with a
3419 timeout just in case.
3421 The simple approach is just to iterate after reading data from a ready pipe.
3422 This leads to non-ideal behaviour when the subprocess has written its final Z
3423 item, closed the pipe, and is in the process of exiting (the common case). A
3424 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3425 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3428 To avoid this, if all the data that is needed has been read from a subprocess
3429 after select(), an explicit wait() for it is done. We know that all it is doing
3430 is writing to the pipe and then exiting, so the wait should not be long.
3432 The non-blocking waitpid() is to some extent just insurance; if we could
3433 reliably detect end-of-file on the pipe, we could always know when to do a
3434 blocking wait() for a completed process. However, because some systems use
3435 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3436 use code that functions without the need to recognize EOF.
3438 There's a double loop here just in case we end up with a process that is not in
3439 the list of remote delivery processes. Something has obviously gone wrong if
3440 this is the case. (For example, a process that is incorrectly left over from
3441 routing or local deliveries might be found.) The damage can be minimized by
3442 looping back and looking for another process. If there aren't any, the error
3443 return will happen. */
3445 for (;;) /* Normally we do not repeat this loop */
3447 while ((pid
= waitpid(-1, &status
, WNOHANG
)) <= 0)
3450 fd_set select_pipes
;
3451 int maxpipe
, readycount
;
3453 /* A return value of -1 can mean several things. If errno != ECHILD, it
3454 either means invalid options (which we discount), or that this process was
3455 interrupted by a signal. Just loop to try the waitpid() again.
3457 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3458 in existence. This should never happen, and is an unexpected error.
3459 However, there is a nasty complication when running under Linux. If "strace
3460 -f" is being used under Linux to trace this process and its children,
3461 subprocesses are "stolen" from their parents and become the children of the
3462 tracing process. A general wait such as the one we've just obeyed returns
3463 as if there are no children while subprocesses are running. Once a
3464 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3465 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3468 This does not happen using "truss" on Solaris, nor (I think) with other
3469 tracing facilities on other OS. It seems to be specific to Linux.
3471 What we do to get round this is to use kill() to see if any of our
3472 subprocesses are still in existence. If kill() gives an OK return, we know
3473 it must be for one of our processes - it can't be for a re-use of the pid,
3474 because if our process had finished, waitpid() would have found it. If any
3475 of our subprocesses are in existence, we proceed to use select() as if
3476 waitpid() had returned zero. I think this is safe. */
3480 if (errno
!= ECHILD
) continue; /* Repeats the waitpid() */
3483 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3484 "for process existence\n");
3486 for (poffset
= 0; poffset
< remote_max_parallel
; poffset
++)
3488 if ((pid
= parlist
[poffset
].pid
) != 0 && kill(pid
, 0) == 0)
3490 DEBUG(D_deliver
) debug_printf("process %d still exists: assume "
3491 "stolen by strace\n", (int)pid
);
3492 break; /* With poffset set */
3496 if (poffset
>= remote_max_parallel
)
3498 DEBUG(D_deliver
) debug_printf("*** no delivery children found\n");
3499 return NULL
; /* This is the error return */
3503 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3504 been handled above. A return value of zero means that there is at least one
3505 subprocess, but there are no completed subprocesses. See if any pipes are
3506 ready with any data for reading. */
3508 DEBUG(D_deliver
) debug_printf("selecting on subprocess pipes\n");
3511 FD_ZERO(&select_pipes
);
3512 for (poffset
= 0; poffset
< remote_max_parallel
; poffset
++)
3514 if (parlist
[poffset
].pid
!= 0)
3516 int fd
= parlist
[poffset
].fd
;
3517 FD_SET(fd
, &select_pipes
);
3518 if (fd
> maxpipe
) maxpipe
= fd
;
3522 /* Stick in a 60-second timeout, just in case. */
3527 readycount
= select(maxpipe
+ 1, (SELECT_ARG2_TYPE
*)&select_pipes
,
3530 /* Scan through the pipes and read any that are ready; use the count
3531 returned by select() to stop when there are no more. Select() can return
3532 with no processes (e.g. if interrupted). This shouldn't matter.
3534 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3535 read, or there was a disaster. In either case, we are finished with this
3536 process. Do an explicit wait() for the process and break the main loop if
3539 It turns out that we have to deal with the case of an interrupted system
3540 call, which can happen on some operating systems if the signal handling is
3541 set up to do that by default. */
3544 readycount
> 0 && poffset
< remote_max_parallel
;
3547 if ((pid
= parlist
[poffset
].pid
) != 0 &&
3548 FD_ISSET(parlist
[poffset
].fd
, &select_pipes
))
3551 if (par_read_pipe(poffset
, FALSE
)) /* Finished with this pipe */
3553 for (;;) /* Loop for signals */
3555 pid_t endedpid
= waitpid(pid
, &status
, 0);
3556 if (endedpid
== pid
) goto PROCESS_DONE
;
3557 if (endedpid
!= (pid_t
)(-1) || errno
!= EINTR
)
3558 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Unexpected error return "
3559 "%d (errno = %d) from waitpid() for process %d",
3560 (int)endedpid
, errno
, (int)pid
);
3566 /* Now go back and look for a completed subprocess again. */
3569 /* A completed process was detected by the non-blocking waitpid(). Find the
3570 data block that corresponds to this subprocess. */
3572 for (poffset
= 0; poffset
< remote_max_parallel
; poffset
++)
3573 if (pid
== parlist
[poffset
].pid
) break;
3575 /* Found the data block; this is a known remote delivery process. We don't
3576 need to repeat the outer loop. This should be what normally happens. */
3578 if (poffset
< remote_max_parallel
) break;
3580 /* This situation is an error, but it's probably better to carry on looking
3581 for another process than to give up (as we used to do). */
3583 log_write(0, LOG_MAIN
|LOG_PANIC
, "Process %d finished: not found in remote "
3584 "transport process list", pid
);
3585 } /* End of the "for" loop */
3587 /* Come here when all the data was completely read after a select(), and
3588 the process in pid has been wait()ed for. */
3595 debug_printf("remote delivery process %d ended\n", (int)pid
);
3597 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid
,
3601 set_process_info("delivering %s", message_id
);
3603 /* Get the chain of processed addresses */
3605 addrlist
= parlist
[poffset
].addrlist
;
3607 /* If the process did not finish cleanly, record an error and freeze (except
3608 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3609 in case the delivery did actually happen. */
3611 if ((status
& 0xffff) != 0)
3614 int msb
= (status
>> 8) & 255;
3615 int lsb
= status
& 255;
3616 int code
= (msb
== 0)? (lsb
& 0x7f) : msb
;
3618 msg
= string_sprintf("%s transport process returned non-zero status 0x%04x: "
3620 addrlist
->transport
->driver_name
,
3622 (msb
== 0)? "terminated by signal" : "exit code",
3625 if (msb
!= 0 || (code
!= SIGTERM
&& code
!= SIGKILL
&& code
!= SIGQUIT
))
3626 addrlist
->special_action
= SPECIAL_FREEZE
;
3628 for (addr
= addrlist
; addr
!= NULL
; addr
= addr
->next
)
3630 addr
->transport_return
= DEFER
;
3631 addr
->message
= msg
;
3634 remove_journal
= FALSE
;
3637 /* Else complete reading the pipe to get the result of the delivery, if all
3638 the data has not yet been obtained. */
3640 else if (!parlist
[poffset
].done
) (void)par_read_pipe(poffset
, TRUE
);
3642 /* Put the data count and return path into globals, mark the data slot unused,
3643 decrement the count of subprocesses, and return the address chain. */
3645 transport_count
= parlist
[poffset
].transport_count
;
3646 used_return_path
= parlist
[poffset
].return_path
;
3647 parlist
[poffset
].pid
= 0;
3654 /*************************************************
3655 * Wait for subprocesses and post-process *
3656 *************************************************/
3658 /* This function waits for subprocesses until the number that are still running
3659 is below a given threshold. For each complete subprocess, the addresses are
3660 post-processed. If we can't find a running process, there is some shambles.
3661 Better not bomb out, as that might lead to multiple copies of the message. Just
3662 log and proceed as if all done.
3665 max maximum number of subprocesses to leave running
3666 fallback TRUE if processing fallback hosts
3672 par_reduce(int max
, BOOL fallback
)
3674 while (parcount
> max
)
3676 address_item
*doneaddr
= par_wait();
3677 if (doneaddr
== NULL
)
3679 log_write(0, LOG_MAIN
|LOG_PANIC
,
3680 "remote delivery process count got out of step");
3683 else remote_post_process(doneaddr
, LOG_MAIN
, NULL
, fallback
);
3691 rmt_dlv_checked_write(int fd
, char id
, char subid
, void * buf
, int size
)
3693 uschar writebuffer
[PIPE_HEADER_SIZE
+ BIG_BUFFER_SIZE
];
3696 /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */
3697 /* complain to log if someone tries with buffer sizes we can't handle*/
3701 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3702 "Failed writing transport result to pipe: can't handle buffers > 99999 bytes. truncating!\n");
3706 /* to keep the write() atomic we build header in writebuffer and copy buf behind */
3707 /* two write() calls would increase the complexity of reading from pipe */
3709 /* convert size to human readable string prepended by id and subid */
3710 header_length
= snprintf(CS writebuffer
, PIPE_HEADER_SIZE
+1, "%c%c%05d", id
, subid
, size
);
3711 if (header_length
!= PIPE_HEADER_SIZE
)
3713 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "header snprintf failed\n");
3714 writebuffer
[0] = '\0';
3717 DEBUG(D_deliver
) debug_printf("header write id:%c,subid:%c,size:%d,final:%s\n",
3718 id
, subid
, size
, writebuffer
);
3720 if (buf
&& size
> 0)
3721 memcpy(writebuffer
+ PIPE_HEADER_SIZE
, buf
, size
);
3723 size
+= PIPE_HEADER_SIZE
;
3724 int ret
= write(fd
, writebuffer
, size
);
3726 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Failed writing transport result to pipe: %s\n",
3727 ret
== -1 ? strerror(errno
) : "short write");
3730 /*************************************************
3731 * Do remote deliveries *
3732 *************************************************/
3734 /* This function is called to process the addresses in addr_remote. We must
3735 pick off the queue all addresses that have the same transport, remote
3736 destination, and errors address, and hand them to the transport in one go,
3737 subject to some configured limitations. If this is a run to continue delivering
3738 to an existing delivery channel, skip all but those addresses that can go to
3739 that channel. The skipped addresses just get deferred.
3741 If mua_wrapper is set, all addresses must be able to be sent in a single
3742 transaction. If not, this function yields FALSE.
3744 In Exim 4, remote deliveries are always done in separate processes, even
3745 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
3746 is so that the base process can retain privilege. This makes the
3747 implementation of fallback transports feasible (though not initially done.)
3749 We create up to the configured number of subprocesses, each of which passes
3750 back the delivery state via a pipe. (However, when sending down an existing
3751 connection, remote_max_parallel is forced to 1.)
3754 fallback TRUE if processing fallback hosts
3756 Returns: TRUE normally
3757 FALSE if mua_wrapper is set and the addresses cannot all be sent
3762 do_remote_deliveries(BOOL fallback
)
3768 parcount
= 0; /* Number of executing subprocesses */
3770 /* When sending down an existing channel, only do one delivery at a time.
3771 We use a local variable (parmax) to hold the maximum number of processes;
3772 this gets reduced from remote_max_parallel if we can't create enough pipes. */
3774 if (continue_transport
!= NULL
) remote_max_parallel
= 1;
3775 parmax
= remote_max_parallel
;
3777 /* If the data for keeping a list of processes hasn't yet been
3780 if (parlist
== NULL
)
3782 parlist
= store_get(remote_max_parallel
* sizeof(pardata
));
3783 for (poffset
= 0; poffset
< remote_max_parallel
; poffset
++)
3784 parlist
[poffset
].pid
= 0;
3787 /* Now loop for each remote delivery */
3789 for (delivery_count
= 0; addr_remote
!= NULL
; delivery_count
++)
3795 int address_count
= 1;
3796 int address_count_max
;
3798 BOOL use_initgroups
;
3799 BOOL pipe_done
= FALSE
;
3800 transport_instance
*tp
;
3801 address_item
**anchor
= &addr_remote
;
3802 address_item
*addr
= addr_remote
;
3803 address_item
*last
= addr
;
3806 /* Pull the first address right off the list. */
3808 addr_remote
= addr
->next
;
3811 DEBUG(D_deliver
|D_transport
)
3812 debug_printf("--------> %s <--------\n", addr
->address
);
3814 /* If no transport has been set, there has been a big screw-up somewhere. */
3816 if ((tp
= addr
->transport
) == NULL
)
3818 disable_logging
= FALSE
; /* Jic */
3819 remote_post_process(addr
, LOG_MAIN
|LOG_PANIC
,
3820 US
"No transport set by router", fallback
);
3824 /* Check that this base address hasn't previously been delivered to this
3825 transport. The check is necessary at this point to handle homonymic addresses
3826 correctly in cases where the pattern of redirection changes between delivery
3827 attempts. Non-homonymic previous delivery is detected earlier, at routing
3830 if (previously_transported(addr
, FALSE
)) continue;
3832 /* Force failure if the message is too big. */
3834 if (tp
->message_size_limit
!= NULL
)
3836 int rc
= check_message_size(tp
, addr
);
3839 addr
->transport_return
= rc
;
3840 remote_post_process(addr
, LOG_MAIN
, NULL
, fallback
);
3845 /* Get the flag which specifies whether the transport can handle different
3846 domains that nevertheless resolve to the same set of hosts. */
3848 multi_domain
= tp
->multi_domain
;
3850 /* Get the maximum it can handle in one envelope, with zero meaning
3851 unlimited, which is forced for the MUA wrapper case. */
3853 address_count_max
= tp
->max_addresses
;
3854 if (address_count_max
== 0 || mua_wrapper
) address_count_max
= 999999;
3857 /************************************************************************/
3858 /***** This is slightly experimental code, but should be safe. *****/
3860 /* The address_count_max value is the maximum number of addresses that the
3861 transport can send in one envelope. However, the transport must be capable of
3862 dealing with any number of addresses. If the number it gets exceeds its
3863 envelope limitation, it must send multiple copies of the message. This can be
3864 done over a single connection for SMTP, so uses less resources than making
3865 multiple connections. On the other hand, if remote_max_parallel is greater
3866 than one, it is perhaps a good idea to use parallel processing to move the
3867 message faster, even if that results in multiple simultaneous connections to
3870 How can we come to some compromise between these two ideals? What we do is to
3871 limit the number of addresses passed to a single instance of a transport to
3872 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
3873 number of addresses routed to remote transports divided by
3874 remote_max_parallel. For example, if the message has 100 remote recipients,
3875 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
3876 once. But if rcpt_max is 100, we could send up to 100.
3878 Of course, not all the remotely addresses in a message are going to go to the
3879 same set of hosts (except in smarthost configurations), so this is just a
3880 heuristic way of dividing up the work.
3882 Furthermore (1), because this may not be wanted in some cases, and also to
3883 cope with really pathological cases, there is also a limit to the number of
3884 messages that are sent over one connection. This is the same limit that is
3885 used when sending several different messages over the same connection.
3886 Continue_sequence is set when in this situation, to the number sent so
3887 far, including this message.
3889 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
3890 is probably because they are using VERP, in which case they want to pass only
3891 one address at a time to the transport, in order to be able to use
3892 $local_part and $domain in constructing a new return path. We could test for
3893 the use of these variables, but as it is so likely they will be used when the
3894 maximum is 1, we don't bother. Just leave the value alone. */
3896 if (address_count_max
!= 1 &&
3897 address_count_max
< remote_delivery_count
/remote_max_parallel
)
3899 int new_max
= remote_delivery_count
/remote_max_parallel
;
3900 int message_max
= tp
->connection_max_messages
;
3901 if (connection_max_messages
>= 0) message_max
= connection_max_messages
;
3902 message_max
-= continue_sequence
- 1;
3903 if (message_max
> 0 && new_max
> address_count_max
* message_max
)
3904 new_max
= address_count_max
* message_max
;
3905 address_count_max
= new_max
;
3908 /************************************************************************/
3911 /* Pick off all addresses which have the same transport, errors address,
3912 destination, and extra headers. In some cases they point to the same host
3913 list, but we also need to check for identical host lists generated from
3914 entirely different domains. The host list pointers can be NULL in the case
3915 where the hosts are defined in the transport. There is also a configured
3916 maximum limit of addresses that can be handled at once (see comments above
3917 for how it is computed). */
3919 while ((next
= *anchor
) != NULL
&& address_count
< address_count_max
)
3921 if ((multi_domain
|| Ustrcmp(next
->domain
, addr
->domain
) == 0)
3923 tp
== next
->transport
3925 same_hosts(next
->host_list
, addr
->host_list
)
3927 same_strings(next
->p
.errors_address
, addr
->p
.errors_address
)
3929 same_headers(next
->p
.extra_headers
, addr
->p
.extra_headers
)
3931 same_ugid(tp
, next
, addr
)
3933 (next
->p
.remove_headers
== addr
->p
.remove_headers
||
3934 (next
->p
.remove_headers
!= NULL
&&
3935 addr
->p
.remove_headers
!= NULL
&&
3936 Ustrcmp(next
->p
.remove_headers
, addr
->p
.remove_headers
) == 0)))
3938 *anchor
= next
->next
;
3940 next
->first
= addr
; /* remember top one (for retry processing) */
3945 else anchor
= &(next
->next
);
3948 /* If we are acting as an MUA wrapper, all addresses must go in a single
3949 transaction. If not, put them back on the chain and yield FALSE. */
3951 if (mua_wrapper
&& addr_remote
!= NULL
)
3953 last
->next
= addr_remote
;
3958 /* Set up the expansion variables for this set of addresses */
3960 deliver_set_expansions(addr
);
3962 /* Ensure any transport-set auth info is fresh */
3963 addr
->authenticator
= addr
->auth_id
= addr
->auth_sndr
= NULL
;
3965 /* Compute the return path, expanding a new one if required. The old one
3966 must be set first, as it might be referred to in the expansion. */
3968 if(addr
->p
.errors_address
!= NULL
)
3969 return_path
= addr
->p
.errors_address
;
3970 #ifdef EXPERIMENTAL_SRS
3971 else if(addr
->p
.srs_sender
!= NULL
)
3972 return_path
= addr
->p
.srs_sender
;
3975 return_path
= sender_address
;
3977 if (tp
->return_path
!= NULL
)
3979 uschar
*new_return_path
= expand_string(tp
->return_path
);
3980 if (new_return_path
== NULL
)
3982 if (!expand_string_forcedfail
)
3984 remote_post_process(addr
, LOG_MAIN
|LOG_PANIC
,
3985 string_sprintf("Failed to expand return path \"%s\": %s",
3986 tp
->return_path
, expand_string_message
), fallback
);
3990 else return_path
= new_return_path
;
3993 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
3994 logs and sets up error messages, so we just post-process and continue with
3995 the next address. */
3997 if (!findugid(addr
, tp
, &uid
, &gid
, &use_initgroups
))
3999 remote_post_process(addr
, LOG_MAIN
|LOG_PANIC
, NULL
, fallback
);
4003 /* If this transport has a setup function, call it now so that it gets
4004 run in this process and not in any subprocess. That way, the results of
4005 any setup that are retained by the transport can be reusable. One of the
4006 things the setup does is to set the fallback host lists in the addresses.
4007 That is why it is called at this point, before the continue delivery
4008 processing, because that might use the fallback hosts. */
4010 if (tp
->setup
!= NULL
)
4011 (void)((tp
->setup
)(addr
->transport
, addr
, NULL
, uid
, gid
, NULL
));
4013 /* If this is a run to continue delivery down an already-established
4014 channel, check that this set of addresses matches the transport and
4015 the channel. If it does not, defer the addresses. If a host list exists,
4016 we must check that the continue host is on the list. Otherwise, the
4017 host is set in the transport. */
4019 continue_more
= FALSE
; /* In case got set for the last lot */
4020 if (continue_transport
!= NULL
)
4022 BOOL ok
= Ustrcmp(continue_transport
, tp
->name
) == 0;
4023 if (ok
&& addr
->host_list
!= NULL
)
4027 for (h
= addr
->host_list
; h
!= NULL
; h
= h
->next
)
4029 if (Ustrcmp(h
->name
, continue_hostname
) == 0)
4030 { ok
= TRUE
; break; }
4034 /* Addresses not suitable; defer or queue for fallback hosts (which
4035 might be the continue host) and skip to next address. */
4039 DEBUG(D_deliver
) debug_printf("not suitable for continue_transport\n");
4042 if (addr
->fallback_hosts
!= NULL
&& !fallback
)
4046 next
->host_list
= next
->fallback_hosts
;
4047 DEBUG(D_deliver
) debug_printf("%s queued for fallback host(s)\n", next
->address
);
4048 if (next
->next
== NULL
) break;
4051 next
->next
= addr_fallback
;
4052 addr_fallback
= addr
;
4057 while (next
->next
!= NULL
) next
= next
->next
;
4058 next
->next
= addr_defer
;
4065 /* Set a flag indicating whether there are further addresses that list
4066 the continued host. This tells the transport to leave the channel open,
4067 but not to pass it to another delivery process. */
4069 for (next
= addr_remote
; next
!= NULL
; next
= next
->next
)
4072 for (h
= next
->host_list
; h
!= NULL
; h
= h
->next
)
4074 if (Ustrcmp(h
->name
, continue_hostname
) == 0)
4075 { continue_more
= TRUE
; break; }
4080 /* The transports set up the process info themselves as they may connect
4081 to more than one remote machine. They also have to set up the filter
4082 arguments, if required, so that the host name and address are available
4085 transport_filter_argv
= NULL
;
4087 /* Create the pipe for inter-process communication. If pipe creation
4088 fails, it is probably because the value of remote_max_parallel is so
4089 large that too many file descriptors for pipes have been created. Arrange
4090 to wait for a process to finish, and then try again. If we still can't
4091 create a pipe when all processes have finished, break the retry loop. */
4095 if (pipe(pfd
) == 0) pipe_done
= TRUE
;
4096 else if (parcount
> 0) parmax
= parcount
;
4099 /* We need to make the reading end of the pipe non-blocking. There are
4100 two different options for this. Exim is cunningly (I hope!) coded so
4101 that it can use either of them, though it prefers O_NONBLOCK, which
4102 distinguishes between EOF and no-more-data. */
4105 (void)fcntl(pfd
[pipe_read
], F_SETFL
, O_NONBLOCK
);
4107 (void)fcntl(pfd
[pipe_read
], F_SETFL
, O_NDELAY
);
4110 /* If the maximum number of subprocesses already exist, wait for a process
4111 to finish. If we ran out of file descriptors, parmax will have been reduced
4112 from its initial value of remote_max_parallel. */
4114 par_reduce(parmax
- 1, fallback
);
4117 /* If we failed to create a pipe and there were no processes to wait
4118 for, we have to give up on this one. Do this outside the above loop
4119 so that we can continue the main loop. */
4123 remote_post_process(addr
, LOG_MAIN
|LOG_PANIC
,
4124 string_sprintf("unable to create pipe: %s", strerror(errno
)), fallback
);
4128 /* Find a free slot in the pardata list. Must do this after the possible
4129 waiting for processes to finish, because a terminating process will free
4132 for (poffset
= 0; poffset
< remote_max_parallel
; poffset
++)
4133 if (parlist
[poffset
].pid
== 0) break;
4135 /* If there isn't one, there has been a horrible disaster. */
4137 if (poffset
>= remote_max_parallel
)
4139 (void)close(pfd
[pipe_write
]);
4140 (void)close(pfd
[pipe_read
]);
4141 remote_post_process(addr
, LOG_MAIN
|LOG_PANIC
,
4142 US
"Unexpectedly no free subprocess slot", fallback
);
4146 /* Now fork a subprocess to do the remote delivery, but before doing so,
4147 ensure that any cached resourses are released so as not to interfere with
4148 what happens in the subprocess. */
4152 if ((pid
= fork()) == 0)
4154 int fd
= pfd
[pipe_write
];
4157 /* Setting this global in the subprocess means we need never clear it */
4158 transport_name
= tp
->name
;
4160 /* There are weird circumstances in which logging is disabled */
4161 disable_logging
= tp
->disable_logging
;
4163 /* Show pids on debug output if parallelism possible */
4165 if (parmax
> 1 && (parcount
> 0 || addr_remote
!= NULL
))
4167 DEBUG(D_any
|D_v
) debug_selector
|= D_pid
;
4168 DEBUG(D_deliver
) debug_printf("Remote delivery process started\n");
4171 /* Reset the random number generator, so different processes don't all
4172 have the same sequence. In the test harness we want different, but
4173 predictable settings for each delivery process, so do something explicit
4174 here rather they rely on the fixed reset in the random number function. */
4176 random_seed
= running_in_test_harness
? 42 + 2*delivery_count
: 0;
4178 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4179 a new process that may be forked to do another delivery down the same
4182 (void)fcntl(fd
, F_SETFD
, fcntl(fd
, F_GETFD
) | FD_CLOEXEC
);
4184 /* Close open file descriptors for the pipes of other processes
4185 that are running in parallel. */
4187 for (poffset
= 0; poffset
< remote_max_parallel
; poffset
++)
4188 if (parlist
[poffset
].pid
!= 0) (void)close(parlist
[poffset
].fd
);
4190 /* This process has inherited a copy of the file descriptor
4191 for the data file, but its file pointer is shared with all the
4192 other processes running in parallel. Therefore, we have to re-open
4193 the file in order to get a new file descriptor with its own
4194 file pointer. We don't need to lock it, as the lock is held by
4195 the parent process. There doesn't seem to be any way of doing
4196 a dup-with-new-file-pointer. */
4198 (void)close(deliver_datafile
);
4199 sprintf(CS spoolname
, "%s/input/%s/%s-D", spool_directory
, message_subdir
,
4201 deliver_datafile
= Uopen(spoolname
, O_RDWR
| O_APPEND
, 0);
4203 if (deliver_datafile
< 0)
4204 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Failed to reopen %s for remote "
4205 "parallel delivery: %s", spoolname
, strerror(errno
));
4207 /* Set the close-on-exec flag */
4209 (void)fcntl(deliver_datafile
, F_SETFD
, fcntl(deliver_datafile
, F_GETFD
) |
4212 /* Set the uid/gid of this process; bombs out on failure. */
4214 exim_setugid(uid
, gid
, use_initgroups
,
4215 string_sprintf("remote delivery to %s with transport=%s",
4216 addr
->address
, tp
->name
));
4218 /* Close the unwanted half of this process' pipe, set the process state,
4219 and run the transport. Afterwards, transport_count will contain the number
4220 of bytes written. */
4222 (void)close(pfd
[pipe_read
]);
4223 set_process_info("delivering %s using %s", message_id
, tp
->name
);
4224 debug_print_string(tp
->debug_string
);
4225 if (!(tp
->info
->code
)(addr
->transport
, addr
)) replicate_status(addr
);
4227 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4228 message_id
, tp
->name
, addr
->address
, (addr
->next
== NULL
)? "" : ", ...");
4230 /* Ensure any cached resources that we used are now released */
4234 /* Pass the result back down the pipe. This is a lot more information
4235 than is needed for a local delivery. We have to send back the error
4236 status for each address, the usability status for each host that is
4237 flagged as unusable, and all the retry items. When TLS is in use, we
4238 send also the cipher and peerdn information. Each type of information
4239 is flagged by an identifying byte, and is then in a fixed format (with
4240 strings terminated by zeros), and there is a final terminator at the
4241 end. The host information and retry information is all attached to
4242 the first address, so that gets sent at the start. */
4244 /* Host unusability information: for most success cases this will
4247 for (h
= addr
->host_list
; h
!= NULL
; h
= h
->next
)
4249 if (h
->address
== NULL
|| h
->status
< hstatus_unusable
) continue;
4250 sprintf(CS big_buffer
, "%c%c%s", h
->status
, h
->why
, h
->address
);
4251 rmt_dlv_checked_write(fd
, 'H', '0', big_buffer
, Ustrlen(big_buffer
+2) + 3);
4254 /* The number of bytes written. This is the same for each address. Even
4255 if we sent several copies of the message down the same connection, the
4256 size of each one is the same, and it's that value we have got because
4257 transport_count gets reset before calling transport_write_message(). */
4259 memcpy(big_buffer
, &transport_count
, sizeof(transport_count
));
4260 rmt_dlv_checked_write(fd
, 'S', '0', big_buffer
, sizeof(transport_count
));
4262 /* Information about what happened to each address. Four item types are
4263 used: an optional 'X' item first, for TLS information, then an optional "C"
4264 item for any client-auth info followed by 'R' items for any retry settings,
4265 and finally an 'A' item for the remaining data. */
4267 for(; addr
!= NULL
; addr
= addr
->next
)
4272 /* The certificate verification status goes into the flags */
4273 if (tls_out
.certificate_verified
) setflag(addr
, af_cert_verified
);
4274 #ifdef EXPERIMENTAL_DANE
4275 if (tls_out
.dane_verified
) setflag(addr
, af_dane_verified
);
4278 /* Use an X item only if there's something to send */
4283 sprintf(CS ptr
, "%.128s", addr
->cipher
);
4289 sprintf(CS ptr
, "%.512s", addr
->peerdn
);
4293 rmt_dlv_checked_write(fd
, 'X', '1', big_buffer
, ptr
- big_buffer
);
4298 if (!tls_export_cert(ptr
, big_buffer_size
-2, addr
->peercert
))
4302 rmt_dlv_checked_write(fd
, 'X', '2', big_buffer
, ptr
- big_buffer
);
4307 if (!tls_export_cert(ptr
, big_buffer_size
-2, addr
->ourcert
))
4311 rmt_dlv_checked_write(fd
, 'X', '3', big_buffer
, ptr
- big_buffer
);
4313 # ifndef DISABLE_OCSP
4314 if (addr
->ocsp
> OCSP_NOT_REQ
)
4317 sprintf(CS ptr
, "%c", addr
->ocsp
+ '0');
4319 rmt_dlv_checked_write(fd
, 'X', '4', big_buffer
, ptr
- big_buffer
);
4322 #endif /*SUPPORT_TLS*/
4324 if (client_authenticator
)
4327 sprintf(CS big_buffer
, "%.64s", client_authenticator
);
4329 rmt_dlv_checked_write(fd
, 'C', '1', big_buffer
, ptr
- big_buffer
);
4331 if (client_authenticated_id
)
4334 sprintf(CS big_buffer
, "%.64s", client_authenticated_id
);
4336 rmt_dlv_checked_write(fd
, 'C', '2', big_buffer
, ptr
- big_buffer
);
4338 if (client_authenticated_sender
)
4341 sprintf(CS big_buffer
, "%.64s", client_authenticated_sender
);
4343 rmt_dlv_checked_write(fd
, 'C', '3', big_buffer
, ptr
- big_buffer
);
4346 #ifndef DISABLE_PRDR
4347 if (addr
->flags
& af_prdr_used
)
4348 rmt_dlv_checked_write(fd
, 'P', '0', NULL
, 0);
4351 #ifdef EXPERIMENTAL_DSN
4352 memcpy(big_buffer
, &addr
->dsn_aware
, sizeof(addr
->dsn_aware
));
4353 rmt_dlv_checked_write(fd
, 'D', '0', big_buffer
, sizeof(addr
->dsn_aware
));
4354 DEBUG(D_deliver
) debug_printf("DSN write: addr->dsn_aware = %d\n", addr
->dsn_aware
);
4357 /* Retry information: for most success cases this will be null. */
4359 for (r
= addr
->retries
; r
!= NULL
; r
= r
->next
)
4362 sprintf(CS big_buffer
, "%c%.500s", r
->flags
, r
->key
);
4363 ptr
= big_buffer
+ Ustrlen(big_buffer
+2) + 3;
4364 memcpy(ptr
, &(r
->basic_errno
), sizeof(r
->basic_errno
));
4365 ptr
+= sizeof(r
->basic_errno
);
4366 memcpy(ptr
, &(r
->more_errno
), sizeof(r
->more_errno
));
4367 ptr
+= sizeof(r
->more_errno
);
4368 if (r
->message
== NULL
) *ptr
++ = 0; else
4370 sprintf(CS ptr
, "%.512s", r
->message
);
4373 rmt_dlv_checked_write(fd
, 'R', '0', big_buffer
, ptr
- big_buffer
);
4376 /* The rest of the information goes in an 'A' item. */
4378 ptr
= big_buffer
+ 2;
4379 sprintf(CS big_buffer
, "%c%c", addr
->transport_return
,
4380 addr
->special_action
);
4381 memcpy(ptr
, &(addr
->basic_errno
), sizeof(addr
->basic_errno
));
4382 ptr
+= sizeof(addr
->basic_errno
);
4383 memcpy(ptr
, &(addr
->more_errno
), sizeof(addr
->more_errno
));
4384 ptr
+= sizeof(addr
->more_errno
);
4385 memcpy(ptr
, &(addr
->flags
), sizeof(addr
->flags
));
4386 ptr
+= sizeof(addr
->flags
);
4388 if (addr
->message
== NULL
) *ptr
++ = 0; else
4390 sprintf(CS ptr
, "%.1024s", addr
->message
);
4394 if (addr
->user_message
== NULL
) *ptr
++ = 0; else
4396 sprintf(CS ptr
, "%.1024s", addr
->user_message
);
4400 if (addr
->host_used
== NULL
) *ptr
++ = 0; else
4402 sprintf(CS ptr
, "%.256s", addr
->host_used
->name
);
4404 sprintf(CS ptr
, "%.64s", addr
->host_used
->address
);
4406 memcpy(ptr
, &(addr
->host_used
->port
), sizeof(addr
->host_used
->port
));
4407 ptr
+= sizeof(addr
->host_used
->port
);
4409 /* DNS lookup status */
4410 *ptr
++ = addr
->host_used
->dnssec
==DS_YES
? '2'
4411 : addr
->host_used
->dnssec
==DS_NO
? '1' : '0';
4414 rmt_dlv_checked_write(fd
, 'A', '0', big_buffer
, ptr
- big_buffer
);
4417 /* Add termination flag, close the pipe, and that's it. The character
4418 after 'Z' indicates whether continue_transport is now NULL or not.
4419 A change from non-NULL to NULL indicates a problem with a continuing
4422 big_buffer
[0] = (continue_transport
== NULL
)? '0' : '1';
4423 rmt_dlv_checked_write(fd
, 'Z', '0', big_buffer
, 1);
4428 /* Back in the mainline: close the unwanted half of the pipe. */
4430 (void)close(pfd
[pipe_write
]);
4432 /* Fork failed; defer with error message */
4436 (void)close(pfd
[pipe_read
]);
4437 remote_post_process(addr
, LOG_MAIN
|LOG_PANIC
,
4438 string_sprintf("fork failed for remote delivery to %s: %s",
4439 addr
->domain
, strerror(errno
)), fallback
);
4443 /* Fork succeeded; increment the count, and remember relevant data for
4444 when the process finishes. */
4447 parlist
[poffset
].addrlist
= parlist
[poffset
].addr
= addr
;
4448 parlist
[poffset
].pid
= pid
;
4449 parlist
[poffset
].fd
= pfd
[pipe_read
];
4450 parlist
[poffset
].done
= FALSE
;
4451 parlist
[poffset
].msg
= NULL
;
4452 parlist
[poffset
].return_path
= return_path
;
4454 /* If the process we've just started is sending a message down an existing
4455 channel, wait for it now. This ensures that only one such process runs at
4456 once, whatever the value of remote_max parallel. Otherwise, we might try to
4457 send two or more messages simultaneously down the same channel. This could
4458 happen if there are different domains that include the same host in otherwise
4459 different host lists.
4461 Also, if the transport closes down the channel, this information gets back
4462 (continue_transport gets set to NULL) before we consider any other addresses
4465 if (continue_transport
!= NULL
) par_reduce(0, fallback
);
4467 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4468 newly created process get going before we create another process. This should
4469 ensure repeatability in the tests. We only need to wait a tad. */
4471 else if (running_in_test_harness
) millisleep(500);
4474 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4475 are still running and post-process their addresses. */
4477 par_reduce(0, fallback
);
4484 /*************************************************
4485 * Split an address into local part and domain *
4486 *************************************************/
4488 /* This function initializes an address for routing by splitting it up into a
4489 local part and a domain. The local part is set up twice - once in its original
4490 casing, and once in lower case, and it is dequoted. We also do the "percent
4491 hack" for configured domains. This may lead to a DEFER result if a lookup
4492 defers. When a percent-hacking takes place, we insert a copy of the original
4493 address as a new parent of this address, as if we have had a redirection.
4496 addr points to an addr_item block containing the address
4499 DEFER - could not determine if domain is %-hackable
4503 deliver_split_address(address_item
*addr
)
4505 uschar
*address
= addr
->address
;
4506 uschar
*domain
= Ustrrchr(address
, '@');
4508 int len
= domain
- address
;
4510 addr
->domain
= string_copylc(domain
+1); /* Domains are always caseless */
4512 /* The implication in the RFCs (though I can't say I've seen it spelled out
4513 explicitly) is that quoting should be removed from local parts at the point
4514 where they are locally interpreted. [The new draft "821" is more explicit on
4515 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4516 removing quoting backslashes and any unquoted doublequotes. */
4518 t
= addr
->cc_local_part
= store_get(len
+1);
4521 register int c
= *address
++;
4522 if (c
== '\"') continue;
4532 /* We do the percent hack only for those domains that are listed in
4533 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4535 if (percent_hack_domains
!= NULL
)
4538 uschar
*new_address
= NULL
;
4539 uschar
*local_part
= addr
->cc_local_part
;
4541 deliver_domain
= addr
->domain
; /* set $domain */
4543 while ((rc
= match_isinlist(deliver_domain
, &percent_hack_domains
, 0,
4544 &domainlist_anchor
, addr
->domain_cache
, MCL_DOMAIN
, TRUE
, NULL
))
4546 (t
= Ustrrchr(local_part
, '%')) != NULL
)
4548 new_address
= string_copy(local_part
);
4549 new_address
[t
- local_part
] = '@';
4550 deliver_domain
= string_copylc(t
+1);
4551 local_part
= string_copyn(local_part
, t
- local_part
);
4554 if (rc
== DEFER
) return DEFER
; /* lookup deferred */
4556 /* If hackery happened, set up new parent and alter the current address. */
4558 if (new_address
!= NULL
)
4560 address_item
*new_parent
= store_get(sizeof(address_item
));
4561 *new_parent
= *addr
;
4562 addr
->parent
= new_parent
;
4563 addr
->address
= new_address
;
4564 addr
->unique
= string_copy(new_address
);
4565 addr
->domain
= deliver_domain
;
4566 addr
->cc_local_part
= local_part
;
4567 DEBUG(D_deliver
) debug_printf("%%-hack changed address to: %s\n",
4572 /* Create the lowercased version of the final local part, and make that the
4573 default one to be used. */
4575 addr
->local_part
= addr
->lc_local_part
= string_copylc(addr
->cc_local_part
);
4582 /*************************************************
4583 * Get next error message text *
4584 *************************************************/
4586 /* If f is not NULL, read the next "paragraph", from a customized error message
4587 text file, terminated by a line containing ****, and expand it.
4590 f NULL or a file to read from
4591 which string indicating which string (for errors)
4593 Returns: NULL or an expanded string
4597 next_emf(FILE *f
, uschar
*which
)
4601 uschar
*para
, *yield
;
4604 if (f
== NULL
) return NULL
;
4606 if (Ufgets(buffer
, sizeof(buffer
), f
) == NULL
||
4607 Ustrcmp(buffer
, "****\n") == 0) return NULL
;
4609 para
= store_get(size
);
4612 para
= string_cat(para
, &size
, &ptr
, buffer
, Ustrlen(buffer
));
4613 if (Ufgets(buffer
, sizeof(buffer
), f
) == NULL
||
4614 Ustrcmp(buffer
, "****\n") == 0) break;
4618 yield
= expand_string(para
);
4619 if (yield
!= NULL
) return yield
;
4621 log_write(0, LOG_MAIN
|LOG_PANIC
, "Failed to expand string from "
4622 "bounce_message_file or warn_message_file (%s): %s", which
,
4623 expand_string_message
);
4630 /*************************************************
4631 * Close down a passed transport channel *
4632 *************************************************/
4634 /* This function is called when a passed transport channel cannot be used.
4635 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
4636 so that the function call can be the argument of a "return" statement.
4639 Returns: DELIVER_NOT_ATTEMPTED
4643 continue_closedown(void)
4645 if (continue_transport
!= NULL
)
4647 transport_instance
*t
;
4648 for (t
= transports
; t
!= NULL
; t
= t
->next
)
4650 if (Ustrcmp(t
->name
, continue_transport
) == 0)
4652 if (t
->info
->closedown
!= NULL
) (t
->info
->closedown
)(t
);
4657 return DELIVER_NOT_ATTEMPTED
;
4663 /*************************************************
4664 * Print address information *
4665 *************************************************/
4667 /* This function is called to output an address, or information about an
4668 address, for bounce or defer messages. If the hide_child flag is set, all we
4669 output is the original ancestor address.
4672 addr points to the address
4673 f the FILE to print to
4674 si an initial string
4675 sc a continuation string for before "generated"
4678 Returns: TRUE if the address is not hidden
4682 print_address_information(address_item
*addr
, FILE *f
, uschar
*si
, uschar
*sc
,
4686 uschar
*printed
= US
"";
4687 address_item
*ancestor
= addr
;
4688 while (ancestor
->parent
!= NULL
) ancestor
= ancestor
->parent
;
4690 fprintf(f
, "%s", CS si
);
4692 if (addr
->parent
!= NULL
&& testflag(addr
, af_hide_child
))
4694 printed
= US
"an undisclosed address";
4697 else if (!testflag(addr
, af_pfr
) || addr
->parent
== NULL
)
4698 printed
= addr
->address
;
4702 uschar
*s
= addr
->address
;
4705 if (addr
->address
[0] == '>') { ss
= US
"mail"; s
++; }
4706 else if (addr
->address
[0] == '|') ss
= US
"pipe";
4709 fprintf(f
, "%s to %s%sgenerated by ", ss
, s
, sc
);
4710 printed
= addr
->parent
->address
;
4713 fprintf(f
, "%s", CS
string_printing(printed
));
4715 if (ancestor
!= addr
)
4717 uschar
*original
= (ancestor
->onetime_parent
== NULL
)?
4718 ancestor
->address
: ancestor
->onetime_parent
;
4719 if (strcmpic(original
, printed
) != 0)
4720 fprintf(f
, "%s(%sgenerated from %s)", sc
,
4721 (ancestor
!= addr
->parent
)? "ultimately " : "",
4722 string_printing(original
));
4725 if (addr
->host_used
)
4726 fprintf(f
, "\n host %s [%s]",
4727 addr
->host_used
->name
, addr
->host_used
->address
);
4729 fprintf(f
, "%s", CS se
);
4737 /*************************************************
4738 * Print error for an address *
4739 *************************************************/
4741 /* This function is called to print the error information out of an address for
4742 a bounce or a warning message. It tries to format the message reasonably by
4743 introducing newlines. All lines are indented by 4; the initial printing
4744 position must be set before calling.
4746 This function used always to print the error. Nowadays we want to restrict it
4747 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
4748 and filter "fail". We no longer pass other information willy-nilly in bounce
4749 and warning messages. Text in user_message is always output; text in message
4750 only if the af_pass_message flag is set.
4754 f the FILE to print on
4761 print_address_error(address_item
*addr
, FILE *f
, uschar
*t
)
4763 int count
= Ustrlen(t
);
4764 uschar
*s
= testflag(addr
, af_pass_message
)? addr
->message
: NULL
;
4768 if (addr
->user_message
!= NULL
) s
= addr
->user_message
; else return;
4771 fprintf(f
, "\n %s", t
);
4775 if (*s
== '\\' && s
[1] == 'n')
4785 if (*s
++ == ':' && isspace(*s
) && count
> 45)
4787 fprintf(f
, "\n "); /* sic (because space follows) */
4799 /*************************************************
4800 * Check list of addresses for duplication *
4801 *************************************************/
4803 /* This function was introduced when the test for duplicate addresses that are
4804 not pipes, files, or autoreplies was moved from the middle of routing to when
4805 routing was complete. That was to fix obscure cases when the routing history
4806 affects the subsequent routing of identical addresses. This function is called
4807 after routing, to check that the final routed addresses are not duplicates.
4809 If we detect a duplicate, we remember what it is a duplicate of. Note that
4810 pipe, file, and autoreply de-duplication is handled during routing, so we must
4811 leave such "addresses" alone here, as otherwise they will incorrectly be
4814 Argument: address of list anchor
4819 do_duplicate_check(address_item
**anchor
)
4822 while ((addr
= *anchor
) != NULL
)
4825 if (testflag(addr
, af_pfr
))
4827 anchor
= &(addr
->next
);
4829 else if ((tnode
= tree_search(tree_duplicates
, addr
->unique
)) != NULL
)
4831 DEBUG(D_deliver
|D_route
)
4832 debug_printf("%s is a duplicate address: discarded\n", addr
->unique
);
4833 *anchor
= addr
->next
;
4834 addr
->dupof
= tnode
->data
.ptr
;
4835 addr
->next
= addr_duplicate
;
4836 addr_duplicate
= addr
;
4840 tree_add_duplicate(addr
->unique
, addr
);
4841 anchor
= &(addr
->next
);
4849 /*************************************************
4850 * Deliver one message *
4851 *************************************************/
4853 /* This is the function which is called when a message is to be delivered. It
4854 is passed the id of the message. It is possible that the message no longer
4855 exists, if some other process has delivered it, and it is also possible that
4856 the message is being worked on by another process, in which case the data file
4859 If no delivery is attempted for any of the above reasons, the function returns
4860 DELIVER_NOT_ATTEMPTED.
4862 If the give_up flag is set true, do not attempt any deliveries, but instead
4863 fail all outstanding addresses and return the message to the sender (or
4866 A delivery operation has a process all to itself; we never deliver more than
4867 one message in the same process. Therefore we needn't worry too much about
4871 id the id of the message to be delivered
4872 forced TRUE if delivery was forced by an administrator; this overrides
4873 retry delays and causes a delivery to be tried regardless
4874 give_up TRUE if an administrator has requested that delivery attempts
4877 Returns: When the global variable mua_wrapper is FALSE:
4878 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
4879 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
4880 When the global variable mua_wrapper is TRUE:
4881 DELIVER_MUA_SUCCEEDED if delivery succeeded
4882 DELIVER_MUA_FAILED if delivery failed
4883 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
4887 deliver_message(uschar
*id
, BOOL forced
, BOOL give_up
)
4890 int final_yield
= DELIVER_ATTEMPTED_NORMAL
;
4891 time_t now
= time(NULL
);
4892 address_item
*addr_last
= NULL
;
4893 uschar
*filter_message
= NULL
;
4895 int process_recipients
= RECIP_ACCEPT
;
4898 extern int acl_where
;
4900 uschar
*info
= (queue_run_pid
== (pid_t
)0)?
4901 string_sprintf("delivering %s", id
) :
4902 string_sprintf("delivering %s (queue run pid %d)", id
, queue_run_pid
);
4904 /* If the D_process_info bit is on, set_process_info() will output debugging
4905 information. If not, we want to show this initial information if D_deliver or
4906 D_queue_run is set or in verbose mode. */
4908 set_process_info("%s", info
);
4910 if ((debug_selector
& D_process_info
) == 0 &&
4911 (debug_selector
& (D_deliver
|D_queue_run
|D_v
)) != 0)
4912 debug_printf("%s\n", info
);
4914 /* Ensure that we catch any subprocesses that are created. Although Exim
4915 sets SIG_DFL as its initial default, some routes through the code end up
4916 here with it set to SIG_IGN - cases where a non-synchronous delivery process
4917 has been forked, but no re-exec has been done. We use sigaction rather than
4918 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
4919 sure it is turned off. (There was a problem on AIX with this.) */
4923 struct sigaction act
;
4924 act
.sa_handler
= SIG_DFL
;
4925 sigemptyset(&(act
.sa_mask
));
4927 sigaction(SIGCHLD
, &act
, NULL
);
4930 signal(SIGCHLD
, SIG_DFL
);
4933 /* Make the forcing flag available for routers and transports, set up the
4934 global message id field, and initialize the count for returned files and the
4935 message size. This use of strcpy() is OK because the length id is checked when
4936 it is obtained from a command line (the -M or -q options), and otherwise it is
4937 known to be a valid message id. */
4939 Ustrcpy(message_id
, id
);
4940 deliver_force
= forced
;
4944 /* Initialize some flags */
4946 update_spool
= FALSE
;
4947 remove_journal
= TRUE
;
4949 /* Set a known context for any ACLs we call via expansions */
4950 acl_where
= ACL_WHERE_DELIVERY
;
4952 /* Reset the random number generator, so that if several delivery processes are
4953 started from a queue runner that has already used random numbers (for sorting),
4954 they don't all get the same sequence. */
4958 /* Open and lock the message's data file. Exim locks on this one because the
4959 header file may get replaced as it is re-written during the delivery process.
4960 Any failures cause messages to be written to the log, except for missing files
4961 while queue running - another process probably completed delivery. As part of
4962 opening the data file, message_subdir gets set. */
4964 if (!spool_open_datafile(id
))
4965 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
4967 /* The value of message_size at this point has been set to the data length,
4968 plus one for the blank line that notionally precedes the data. */
4970 /* Now read the contents of the header file, which will set up the headers in
4971 store, and also the list of recipients and the tree of non-recipients and
4972 assorted flags. It updates message_size. If there is a reading or format error,
4973 give up; if the message has been around for sufficiently long, remove it. */
4975 sprintf(CS spoolname
, "%s-H", id
);
4976 if ((rc
= spool_read_header(spoolname
, TRUE
, TRUE
)) != spool_read_OK
)
4978 if (errno
== ERRNO_SPOOLFORMAT
)
4980 struct stat statbuf
;
4981 sprintf(CS big_buffer
, "%s/input/%s/%s", spool_directory
, message_subdir
,
4983 if (Ustat(big_buffer
, &statbuf
) == 0)
4984 log_write(0, LOG_MAIN
, "Format error in spool file %s: "
4985 "size=" OFF_T_FMT
, spoolname
, statbuf
.st_size
);
4986 else log_write(0, LOG_MAIN
, "Format error in spool file %s", spoolname
);
4989 log_write(0, LOG_MAIN
, "Error reading spool file %s: %s", spoolname
,
4992 /* If we managed to read the envelope data, received_time contains the
4993 time the message was received. Otherwise, we can calculate it from the
4996 if (rc
!= spool_read_hdrerror
)
4999 for (i
= 0; i
< 6; i
++)
5000 received_time
= received_time
* BASE_62
+ tab62
[id
[i
] - '0'];
5003 /* If we've had this malformed message too long, sling it. */
5005 if (now
- received_time
> keep_malformed
)
5007 sprintf(CS spoolname
, "%s/msglog/%s/%s", spool_directory
, message_subdir
, id
);
5009 sprintf(CS spoolname
, "%s/input/%s/%s-D", spool_directory
, message_subdir
, id
);
5011 sprintf(CS spoolname
, "%s/input/%s/%s-H", spool_directory
, message_subdir
, id
);
5013 sprintf(CS spoolname
, "%s/input/%s/%s-J", spool_directory
, message_subdir
, id
);
5015 log_write(0, LOG_MAIN
, "Message removed because older than %s",
5016 readconf_printtime(keep_malformed
));
5019 (void)close(deliver_datafile
);
5020 deliver_datafile
= -1;
5021 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5024 /* The spool header file has been read. Look to see if there is an existing
5025 journal file for this message. If there is, it means that a previous delivery
5026 attempt crashed (program or host) before it could update the spool header file.
5027 Read the list of delivered addresses from the journal and add them to the
5028 nonrecipients tree. Then update the spool file. We can leave the journal in
5029 existence, as it will get further successful deliveries added to it in this
5030 run, and it will be deleted if this function gets to its end successfully.
5031 Otherwise it might be needed again. */
5033 sprintf(CS spoolname
, "%s/input/%s/%s-J", spool_directory
, message_subdir
, id
);
5034 jread
= Ufopen(spoolname
, "rb");
5037 while (Ufgets(big_buffer
, big_buffer_size
, jread
) != NULL
)
5039 int n
= Ustrlen(big_buffer
);
5040 big_buffer
[n
-1] = 0;
5041 tree_add_nonrecipient(big_buffer
);
5042 DEBUG(D_deliver
) debug_printf("Previously delivered address %s taken from "
5043 "journal file\n", big_buffer
);
5045 (void)fclose(jread
);
5046 /* Panic-dies on error */
5047 (void)spool_write_header(message_id
, SW_DELIVERING
, NULL
);
5049 else if (errno
!= ENOENT
)
5051 log_write(0, LOG_MAIN
|LOG_PANIC
, "attempt to open journal for reading gave: "
5052 "%s", strerror(errno
));
5053 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5056 /* A null recipients list indicates some kind of disaster. */
5058 if (recipients_list
== NULL
)
5060 (void)close(deliver_datafile
);
5061 deliver_datafile
= -1;
5062 log_write(0, LOG_MAIN
, "Spool error: no recipients for %s", spoolname
);
5063 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5067 /* Handle a message that is frozen. There are a number of different things that
5068 can happen, but in the default situation, unless forced, no delivery is
5073 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
5074 /* Moving to another directory removes the message from Exim's view. Other
5075 tools must be used to deal with it. Logging of this action happens in
5076 spool_move_message() and its subfunctions. */
5078 if (move_frozen_messages
&&
5079 spool_move_message(id
, message_subdir
, US
"", US
"F"))
5080 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5083 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
5084 maximum time to keep messages that are frozen. Thaw if we reach it, with a
5085 flag causing all recipients to be failed. The time is the age of the
5086 message, not the time since freezing. */
5088 if (timeout_frozen_after
> 0 && message_age
>= timeout_frozen_after
)
5090 log_write(0, LOG_MAIN
, "cancelled by timeout_frozen_after");
5091 process_recipients
= RECIP_FAIL_TIMEOUT
;
5094 /* For bounce messages (and others with no sender), thaw if the error message
5095 ignore timer is exceeded. The message will be discarded if this delivery
5098 else if (sender_address
[0] == 0 && message_age
>= ignore_bounce_errors_after
)
5100 log_write(0, LOG_MAIN
, "Unfrozen by errmsg timer");
5103 /* If this is a bounce message, or there's no auto thaw, or we haven't
5104 reached the auto thaw time yet, and this delivery is not forced by an admin
5105 user, do not attempt delivery of this message. Note that forced is set for
5106 continuing messages down the same channel, in order to skip load checking and
5107 ignore hold domains, but we don't want unfreezing in that case. */
5111 if ((sender_address
[0] == 0 ||
5113 now
<= deliver_frozen_at
+ auto_thaw
5116 (!forced
|| !deliver_force_thaw
|| !admin_user
||
5117 continue_hostname
!= NULL
5120 (void)close(deliver_datafile
);
5121 deliver_datafile
= -1;
5122 log_write(L_skip_delivery
, LOG_MAIN
, "Message is frozen");
5123 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5126 /* If delivery was forced (by an admin user), assume a manual thaw.
5127 Otherwise it's an auto thaw. */
5131 deliver_manual_thaw
= TRUE
;
5132 log_write(0, LOG_MAIN
, "Unfrozen by forced delivery");
5134 else log_write(0, LOG_MAIN
, "Unfrozen by auto-thaw");
5137 /* We get here if any of the rules for unfreezing have triggered. */
5139 deliver_freeze
= FALSE
;
5140 update_spool
= TRUE
;
5144 /* Open the message log file if we are using them. This records details of
5145 deliveries, deferments, and failures for the benefit of the mail administrator.
5146 The log is not used by exim itself to track the progress of a message; that is
5147 done by rewriting the header spool file. */
5154 sprintf(CS spoolname
, "%s/msglog/%s/%s", spool_directory
, message_subdir
, id
);
5155 fd
= open_msglog_file(spoolname
, SPOOL_MODE
, &error
);
5159 log_write(0, LOG_MAIN
|LOG_PANIC
, "Couldn't %s message log %s: %s", error
,
5160 spoolname
, strerror(errno
));
5161 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5164 /* Make a C stream out of it. */
5166 message_log
= fdopen(fd
, "a");
5167 if (message_log
== NULL
)
5169 log_write(0, LOG_MAIN
|LOG_PANIC
, "Couldn't fdopen message log %s: %s",
5170 spoolname
, strerror(errno
));
5171 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5176 /* If asked to give up on a message, log who did it, and set the action for all
5181 struct passwd
*pw
= getpwuid(real_uid
);
5182 log_write(0, LOG_MAIN
, "cancelled by %s", (pw
!= NULL
)?
5183 US pw
->pw_name
: string_sprintf("uid %ld", (long int)real_uid
));
5184 process_recipients
= RECIP_FAIL
;
5187 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5189 else if (received_count
> received_headers_max
)
5190 process_recipients
= RECIP_FAIL_LOOP
;
5192 /* Otherwise, if a system-wide, address-independent message filter is
5193 specified, run it now, except in the case when we are failing all recipients as
5194 a result of timeout_frozen_after. If the system filter yields "delivered", then
5195 ignore the true recipients of the message. Failure of the filter file is
5196 logged, and the delivery attempt fails. */
5198 else if (system_filter
!= NULL
&& process_recipients
!= RECIP_FAIL_TIMEOUT
)
5203 redirect_block redirect
;
5205 if (system_filter_uid_set
)
5207 ugid
.uid
= system_filter_uid
;
5208 ugid
.gid
= system_filter_gid
;
5209 ugid
.uid_set
= ugid
.gid_set
= TRUE
;
5213 ugid
.uid_set
= ugid
.gid_set
= FALSE
;
5216 return_path
= sender_address
;
5217 enable_dollar_recipients
= TRUE
; /* Permit $recipients in system filter */
5218 system_filtering
= TRUE
;
5220 /* Any error in the filter file causes a delivery to be abandoned. */
5222 redirect
.string
= system_filter
;
5223 redirect
.isfile
= TRUE
;
5224 redirect
.check_owner
= redirect
.check_group
= FALSE
;
5225 redirect
.owners
= NULL
;
5226 redirect
.owngroups
= NULL
;
5228 redirect
.modemask
= 0;
5230 DEBUG(D_deliver
|D_filter
) debug_printf("running system filter\n");
5233 &redirect
, /* Where the data is */
5234 RDO_DEFER
| /* Turn on all the enabling options */
5235 RDO_FAIL
| /* Leave off all the disabling options */
5240 NULL
, /* No :include: restriction (not used in filter) */
5241 NULL
, /* No sieve vacation directory (not sieve!) */
5242 NULL
, /* No sieve enotify mailto owner (not sieve!) */
5243 NULL
, /* No sieve user address (not sieve!) */
5244 NULL
, /* No sieve subaddress (not sieve!) */
5245 &ugid
, /* uid/gid data */
5246 &addr_new
, /* Where to hang generated addresses */
5247 &filter_message
, /* Where to put error message */
5248 NULL
, /* Don't skip syntax errors */
5249 &filtertype
, /* Will always be set to FILTER_EXIM for this call */
5250 US
"system filter"); /* For error messages */
5252 DEBUG(D_deliver
|D_filter
) debug_printf("system filter returned %d\n", rc
);
5254 if (rc
== FF_ERROR
|| rc
== FF_NONEXIST
)
5256 (void)close(deliver_datafile
);
5257 deliver_datafile
= -1;
5258 log_write(0, LOG_MAIN
|LOG_PANIC
, "Error in system filter: %s",
5259 string_printing(filter_message
));
5260 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5263 /* Reset things. If the filter message is an empty string, which can happen
5264 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5266 system_filtering
= FALSE
;
5267 enable_dollar_recipients
= FALSE
;
5268 if (filter_message
!= NULL
&& filter_message
[0] == 0) filter_message
= NULL
;
5270 /* Save the values of the system filter variables so that user filters
5273 memcpy(filter_sn
, filter_n
, sizeof(filter_sn
));
5275 /* The filter can request that delivery of the original addresses be
5280 process_recipients
= RECIP_DEFER
;
5281 deliver_msglog("Delivery deferred by system filter\n");
5282 log_write(0, LOG_MAIN
, "Delivery deferred by system filter");
5285 /* The filter can request that a message be frozen, but this does not
5286 take place if the message has been manually thawed. In that case, we must
5287 unset "delivered", which is forced by the "freeze" command to make -bF
5290 else if (rc
== FF_FREEZE
&& !deliver_manual_thaw
)
5292 deliver_freeze
= TRUE
;
5293 deliver_frozen_at
= time(NULL
);
5294 process_recipients
= RECIP_DEFER
;
5295 frozen_info
= string_sprintf(" by the system filter%s%s",
5296 (filter_message
== NULL
)? US
"" : US
": ",
5297 (filter_message
== NULL
)? US
"" : filter_message
);
5300 /* The filter can request that a message be failed. The error message may be
5301 quite long - it is sent back to the sender in the bounce - but we don't want
5302 to fill up the log with repetitions of it. If it starts with << then the text
5303 between << and >> is written to the log, with the rest left for the bounce
5306 else if (rc
== FF_FAIL
)
5308 uschar
*colon
= US
"";
5309 uschar
*logmsg
= US
"";
5312 process_recipients
= RECIP_FAIL_FILTER
;
5314 if (filter_message
!= NULL
)
5318 if (filter_message
[0] == '<' && filter_message
[1] == '<' &&
5319 (logend
= Ustrstr(filter_message
, ">>")) != NULL
)
5321 logmsg
= filter_message
+ 2;
5322 loglen
= logend
- logmsg
;
5323 filter_message
= logend
+ 2;
5324 if (filter_message
[0] == 0) filter_message
= NULL
;
5328 logmsg
= filter_message
;
5329 loglen
= Ustrlen(filter_message
);
5333 log_write(0, LOG_MAIN
, "cancelled by system filter%s%.*s", colon
, loglen
,
5337 /* Delivery can be restricted only to those recipients (if any) that the
5338 filter specified. */
5340 else if (rc
== FF_DELIVERED
)
5342 process_recipients
= RECIP_IGNORE
;
5343 if (addr_new
== NULL
)
5344 log_write(0, LOG_MAIN
, "=> discarded (system filter)");
5346 log_write(0, LOG_MAIN
, "original recipients ignored (system filter)");
5349 /* If any new addresses were created by the filter, fake up a "parent"
5350 for them. This is necessary for pipes, etc., which are expected to have
5351 parents, and it also gives some sensible logging for others. Allow
5352 pipes, files, and autoreplies, and run them as the filter uid if set,
5353 otherwise as the current uid. */
5355 if (addr_new
!= NULL
)
5357 int uid
= (system_filter_uid_set
)? system_filter_uid
: geteuid();
5358 int gid
= (system_filter_gid_set
)? system_filter_gid
: getegid();
5360 /* The text "system-filter" is tested in transport_set_up_command() and in
5361 set_up_shell_command() in the pipe transport, to enable them to permit
5362 $recipients, so don't change it here without also changing it there. */
5364 address_item
*p
= addr_new
;
5365 address_item
*parent
= deliver_make_addr(US
"system-filter", FALSE
);
5367 parent
->domain
= string_copylc(qualify_domain_recipient
);
5368 parent
->local_part
= US
"system-filter";
5370 /* As part of this loop, we arrange for addr_last to end up pointing
5371 at the final address. This is used if we go on to add addresses for the
5372 original recipients. */
5376 if (parent
->child_count
== SHRT_MAX
)
5377 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "system filter generated more "
5378 "than %d delivery addresses", SHRT_MAX
);
5379 parent
->child_count
++;
5382 if (testflag(p
, af_pfr
))
5388 setflag(p
, af_uid_set
|
5394 /* Find the name of the system filter's appropriate pfr transport */
5396 if (p
->address
[0] == '|')
5399 tpname
= system_filter_pipe_transport
;
5400 address_pipe
= p
->address
;
5402 else if (p
->address
[0] == '>')
5405 tpname
= system_filter_reply_transport
;
5409 if (p
->address
[Ustrlen(p
->address
)-1] == '/')
5411 type
= US
"directory";
5412 tpname
= system_filter_directory_transport
;
5417 tpname
= system_filter_file_transport
;
5419 address_file
= p
->address
;
5422 /* Now find the actual transport, first expanding the name. We have
5423 set address_file or address_pipe above. */
5427 uschar
*tmp
= expand_string(tpname
);
5428 address_file
= address_pipe
= NULL
;
5430 p
->message
= string_sprintf("failed to expand \"%s\" as a "
5431 "system filter transport name", tpname
);
5436 p
->message
= string_sprintf("system_filter_%s_transport is unset",
5442 transport_instance
*tp
;
5443 for (tp
= transports
; tp
!= NULL
; tp
= tp
->next
)
5445 if (Ustrcmp(tp
->name
, tpname
) == 0)
5452 p
->message
= string_sprintf("failed to find \"%s\" transport "
5453 "for system filter delivery", tpname
);
5456 /* If we couldn't set up a transport, defer the delivery, putting the
5457 error on the panic log as well as the main log. */
5459 if (p
->transport
== NULL
)
5461 address_item
*badp
= p
;
5463 if (addr_last
== NULL
) addr_new
= p
; else addr_last
->next
= p
;
5464 badp
->local_part
= badp
->address
; /* Needed for log line */
5465 post_process_one(badp
, DEFER
, LOG_MAIN
|LOG_PANIC
, DTYPE_ROUTER
, 0);
5468 } /* End of pfr handling */
5470 /* Either a non-pfr delivery, or we found a transport */
5472 DEBUG(D_deliver
|D_filter
)
5473 debug_printf("system filter added %s\n", p
->address
);
5477 } /* Loop through all addr_new addresses */
5482 /* Scan the recipients list, and for every one that is not in the non-
5483 recipients tree, add an addr item to the chain of new addresses. If the pno
5484 value is non-negative, we must set the onetime parent from it. This which
5485 points to the relevant entry in the recipients list.
5487 This processing can be altered by the setting of the process_recipients
5488 variable, which is changed if recipients are to be ignored, failed, or
5489 deferred. This can happen as a result of system filter activity, or if the -Mg
5490 option is used to fail all of them.
5492 Duplicate addresses are handled later by a different tree structure; we can't
5493 just extend the non-recipients tree, because that will be re-written to the
5494 spool if the message is deferred, and in any case there are casing
5495 complications for local addresses. */
5497 if (process_recipients
!= RECIP_IGNORE
)
5499 for (i
= 0; i
< recipients_count
; i
++)
5501 if (tree_search(tree_nonrecipients
, recipients_list
[i
].address
) == NULL
)
5503 recipient_item
*r
= recipients_list
+ i
;
5504 address_item
*new = deliver_make_addr(r
->address
, FALSE
);
5505 new->p
.errors_address
= r
->errors_to
;
5508 new->onetime_parent
= recipients_list
[r
->pno
].address
;
5510 #ifdef EXPERIMENTAL_DSN
5511 /* If DSN support is enabled, set the dsn flags and the original receipt
5512 to be passed on to other DSN enabled MTAs */
5513 new->dsn_flags
= r
->dsn_flags
& rf_dsnflags
;
5514 new->dsn_orcpt
= r
->orcpt
;
5515 DEBUG(D_deliver
) debug_printf("DSN: set orcpt: %s flags: %d\n", new->dsn_orcpt
, new->dsn_flags
);
5518 switch (process_recipients
)
5520 /* RECIP_DEFER is set when a system filter freezes a message. */
5523 new->next
= addr_defer
;
5528 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
5531 case RECIP_FAIL_FILTER
:
5533 (filter_message
== NULL
)? US
"delivery cancelled" : filter_message
;
5534 setflag(new, af_pass_message
);
5535 goto RECIP_QUEUE_FAILED
; /* below */
5538 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
5539 than the value in timeout_frozen_after. Treat non-bounce messages
5540 similarly to -Mg; for bounce messages we just want to discard, so
5541 don't put the address on the failed list. The timeout has already
5544 case RECIP_FAIL_TIMEOUT
:
5545 new->message
= US
"delivery cancelled; message timed out";
5546 goto RECIP_QUEUE_FAILED
; /* below */
5549 /* RECIP_FAIL is set when -Mg has been used. */
5552 new->message
= US
"delivery cancelled by administrator";
5555 /* Common code for the failure cases above. If this is not a bounce
5556 message, put the address on the failed list so that it is used to
5557 create a bounce. Otherwise do nothing - this just discards the address.
5558 The incident has already been logged. */
5561 if (sender_address
[0] != 0)
5563 new->next
= addr_failed
;
5569 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
5570 in the message. Process each address as a routing failure; if this
5571 is a bounce message, it will get frozen. */
5573 case RECIP_FAIL_LOOP
:
5574 new->message
= US
"Too many \"Received\" headers - suspected mail loop";
5575 post_process_one(new, FAIL
, LOG_MAIN
, DTYPE_ROUTER
, 0);
5579 /* Value should be RECIP_ACCEPT; take this as the safe default. */
5582 if (addr_new
== NULL
) addr_new
= new; else addr_last
->next
= new;
5587 #ifdef EXPERIMENTAL_TPDA
5588 if (process_recipients
!= RECIP_ACCEPT
)
5590 uschar
* save_local
= deliver_localpart
;
5591 uschar
* save_domain
= deliver_domain
;
5593 deliver_localpart
= expand_string(
5594 string_sprintf("${local_part:%s}", new->address
));
5595 deliver_domain
= expand_string(
5596 string_sprintf("${domain:%s}", new->address
));
5598 (void) tpda_raise_event(delivery_event_action
,
5599 US
"msg:fail:internal", new->message
);
5601 deliver_localpart
= save_local
;
5602 deliver_domain
= save_domain
;
5611 address_item
*p
= addr_new
;
5612 debug_printf("Delivery address list:\n");
5615 debug_printf(" %s %s\n", p
->address
, (p
->onetime_parent
== NULL
)? US
"" :
5621 /* Set up the buffers used for copying over the file when delivering. */
5623 deliver_in_buffer
= store_malloc(DELIVER_IN_BUFFER_SIZE
);
5624 deliver_out_buffer
= store_malloc(DELIVER_OUT_BUFFER_SIZE
);
5628 /* Until there are no more new addresses, handle each one as follows:
5630 . If this is a generated address (indicated by the presence of a parent
5631 pointer) then check to see whether it is a pipe, file, or autoreply, and
5632 if so, handle it directly here. The router that produced the address will
5633 have set the allow flags into the address, and also set the uid/gid required.
5634 Having the routers generate new addresses and then checking them here at
5635 the outer level is tidier than making each router do the checking, and
5636 means that routers don't need access to the failed address queue.
5638 . Break up the address into local part and domain, and make lowercased
5639 versions of these strings. We also make unquoted versions of the local part.
5641 . Handle the percent hack for those domains for which it is valid.
5643 . For child addresses, determine if any of the parents have the same address.
5644 If so, generate a different string for previous delivery checking. Without
5645 this code, if the address spqr generates spqr via a forward or alias file,
5646 delivery of the generated spqr stops further attempts at the top level spqr,
5647 which is not what is wanted - it may have generated other addresses.
5649 . Check on the retry database to see if routing was previously deferred, but
5650 only if in a queue run. Addresses that are to be routed are put on the
5651 addr_route chain. Addresses that are to be deferred are put on the
5652 addr_defer chain. We do all the checking first, so as not to keep the
5653 retry database open any longer than necessary.
5655 . Now we run the addresses through the routers. A router may put the address
5656 on either the addr_local or the addr_remote chain for local or remote
5657 delivery, respectively, or put it on the addr_failed chain if it is
5658 undeliveable, or it may generate child addresses and put them on the
5659 addr_new chain, or it may defer an address. All the chain anchors are
5660 passed as arguments so that the routers can be called for verification
5663 . If new addresses have been generated by the routers, da capo.
5666 header_rewritten
= FALSE
; /* No headers rewritten yet */
5667 while (addr_new
!= NULL
) /* Loop until all addresses dealt with */
5669 address_item
*addr
, *parent
;
5670 dbm_file
= dbfn_open(US
"retry", O_RDONLY
, &dbblock
, FALSE
);
5672 /* Failure to open the retry database is treated the same as if it does
5673 not exist. In both cases, dbm_file is NULL. */
5675 if (dbm_file
== NULL
)
5677 DEBUG(D_deliver
|D_retry
|D_route
|D_hints_lookup
)
5678 debug_printf("no retry data available\n");
5681 /* Scan the current batch of new addresses, to handle pipes, files and
5682 autoreplies, and determine which others are ready for routing. */
5684 while (addr_new
!= NULL
)
5689 dbdata_retry
*domain_retry_record
;
5690 dbdata_retry
*address_retry_record
;
5693 addr_new
= addr
->next
;
5695 DEBUG(D_deliver
|D_retry
|D_route
)
5697 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5698 debug_printf("Considering: %s\n", addr
->address
);
5701 /* Handle generated address that is a pipe or a file or an autoreply. */
5703 if (testflag(addr
, af_pfr
))
5705 /* If an autoreply in a filter could not generate a syntactically valid
5706 address, give up forthwith. Set af_ignore_error so that we don't try to
5707 generate a bounce. */
5709 if (testflag(addr
, af_bad_reply
))
5711 addr
->basic_errno
= ERRNO_BADADDRESS2
;
5712 addr
->local_part
= addr
->address
;
5714 US
"filter autoreply generated syntactically invalid recipient";
5715 setflag(addr
, af_ignore_error
);
5716 (void)post_process_one(addr
, FAIL
, LOG_MAIN
, DTYPE_ROUTER
, 0);
5717 continue; /* with the next new address */
5720 /* If two different users specify delivery to the same pipe or file or
5721 autoreply, there should be two different deliveries, so build a unique
5722 string that incorporates the original address, and use this for
5723 duplicate testing and recording delivery, and also for retrying. */
5726 string_sprintf("%s:%s", addr
->address
, addr
->parent
->unique
+
5727 (testflag(addr
->parent
, af_homonym
)? 3:0));
5729 addr
->address_retry_key
= addr
->domain_retry_key
=
5730 string_sprintf("T:%s", addr
->unique
);
5732 /* If a filter file specifies two deliveries to the same pipe or file,
5733 we want to de-duplicate, but this is probably not wanted for two mail
5734 commands to the same address, where probably both should be delivered.
5735 So, we have to invent a different unique string in that case. Just
5736 keep piling '>' characters on the front. */
5738 if (addr
->address
[0] == '>')
5740 while (tree_search(tree_duplicates
, addr
->unique
) != NULL
)
5741 addr
->unique
= string_sprintf(">%s", addr
->unique
);
5744 else if ((tnode
= tree_search(tree_duplicates
, addr
->unique
)) != NULL
)
5746 DEBUG(D_deliver
|D_route
)
5747 debug_printf("%s is a duplicate address: discarded\n", addr
->address
);
5748 addr
->dupof
= tnode
->data
.ptr
;
5749 addr
->next
= addr_duplicate
;
5750 addr_duplicate
= addr
;
5754 DEBUG(D_deliver
|D_route
) debug_printf("unique = %s\n", addr
->unique
);
5756 /* Check for previous delivery */
5758 if (tree_search(tree_nonrecipients
, addr
->unique
) != NULL
)
5760 DEBUG(D_deliver
|D_route
)
5761 debug_printf("%s was previously delivered: discarded\n", addr
->address
);
5762 child_done(addr
, tod_stamp(tod_log
));
5766 /* Save for checking future duplicates */
5768 tree_add_duplicate(addr
->unique
, addr
);
5770 /* Set local part and domain */
5772 addr
->local_part
= addr
->address
;
5773 addr
->domain
= addr
->parent
->domain
;
5775 /* Ensure that the delivery is permitted. */
5777 if (testflag(addr
, af_file
))
5779 if (!testflag(addr
, af_allow_file
))
5781 addr
->basic_errno
= ERRNO_FORBIDFILE
;
5782 addr
->message
= US
"delivery to file forbidden";
5783 (void)post_process_one(addr
, FAIL
, LOG_MAIN
, DTYPE_ROUTER
, 0);
5784 continue; /* with the next new address */
5787 else if (addr
->address
[0] == '|')
5789 if (!testflag(addr
, af_allow_pipe
))
5791 addr
->basic_errno
= ERRNO_FORBIDPIPE
;
5792 addr
->message
= US
"delivery to pipe forbidden";
5793 (void)post_process_one(addr
, FAIL
, LOG_MAIN
, DTYPE_ROUTER
, 0);
5794 continue; /* with the next new address */
5797 else if (!testflag(addr
, af_allow_reply
))
5799 addr
->basic_errno
= ERRNO_FORBIDREPLY
;
5800 addr
->message
= US
"autoreply forbidden";
5801 (void)post_process_one(addr
, FAIL
, LOG_MAIN
, DTYPE_ROUTER
, 0);
5802 continue; /* with the next new address */
5805 /* If the errno field is already set to BADTRANSPORT, it indicates
5806 failure to expand a transport string, or find the associated transport,
5807 or an unset transport when one is required. Leave this test till now so
5808 that the forbid errors are given in preference. */
5810 if (addr
->basic_errno
== ERRNO_BADTRANSPORT
)
5812 (void)post_process_one(addr
, DEFER
, LOG_MAIN
, DTYPE_ROUTER
, 0);
5816 /* Treat /dev/null as a special case and abandon the delivery. This
5817 avoids having to specify a uid on the transport just for this case.
5818 Arrange for the transport name to be logged as "**bypassed**". */
5820 if (Ustrcmp(addr
->address
, "/dev/null") == 0)
5822 uschar
*save
= addr
->transport
->name
;
5823 addr
->transport
->name
= US
"**bypassed**";
5824 (void)post_process_one(addr
, OK
, LOG_MAIN
, DTYPE_TRANSPORT
, '=');
5825 addr
->transport
->name
= save
;
5826 continue; /* with the next new address */
5829 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
5832 DEBUG(D_deliver
|D_route
)
5833 debug_printf("queued for %s transport\n", addr
->transport
->name
);
5834 addr
->next
= addr_local
;
5836 continue; /* with the next new address */
5839 /* Handle normal addresses. First, split up into local part and domain,
5840 handling the %-hack if necessary. There is the possibility of a defer from
5841 a lookup in percent_hack_domains. */
5843 if ((rc
= deliver_split_address(addr
)) == DEFER
)
5845 addr
->message
= US
"cannot check percent_hack_domains";
5846 addr
->basic_errno
= ERRNO_LISTDEFER
;
5847 (void)post_process_one(addr
, DEFER
, LOG_MAIN
, DTYPE_NONE
, 0);
5851 /* Check to see if the domain is held. If so, proceed only if the
5852 delivery was forced by hand. */
5854 deliver_domain
= addr
->domain
; /* set $domain */
5855 if (!forced
&& hold_domains
!= NULL
&&
5856 (rc
= match_isinlist(addr
->domain
, &hold_domains
, 0,
5857 &domainlist_anchor
, addr
->domain_cache
, MCL_DOMAIN
, TRUE
,
5862 addr
->message
= US
"hold_domains lookup deferred";
5863 addr
->basic_errno
= ERRNO_LISTDEFER
;
5867 addr
->message
= US
"domain is held";
5868 addr
->basic_errno
= ERRNO_HELD
;
5870 (void)post_process_one(addr
, DEFER
, LOG_MAIN
, DTYPE_NONE
, 0);
5874 /* Now we can check for duplicates and previously delivered addresses. In
5875 order to do this, we have to generate a "unique" value for each address,
5876 because there may be identical actual addresses in a line of descendents.
5877 The "unique" field is initialized to the same value as the "address" field,
5878 but gets changed here to cope with identically-named descendents. */
5880 for (parent
= addr
->parent
; parent
!= NULL
; parent
= parent
->parent
)
5881 if (strcmpic(addr
->address
, parent
->address
) == 0) break;
5883 /* If there's an ancestor with the same name, set the homonym flag. This
5884 influences how deliveries are recorded. Then add a prefix on the front of
5885 the unique address. We use \n\ where n starts at 0 and increases each time.
5886 It is unlikely to pass 9, but if it does, it may look odd but will still
5887 work. This means that siblings or cousins with the same names are treated
5888 as duplicates, which is what we want. */
5892 setflag(addr
, af_homonym
);
5893 if (parent
->unique
[0] != '\\')
5894 addr
->unique
= string_sprintf("\\0\\%s", addr
->address
);
5896 addr
->unique
= string_sprintf("\\%c\\%s", parent
->unique
[1] + 1,
5900 /* Ensure that the domain in the unique field is lower cased, because
5901 domains are always handled caselessly. */
5903 p
= Ustrrchr(addr
->unique
, '@');
5904 while (*p
!= 0) { *p
= tolower(*p
); p
++; }
5906 DEBUG(D_deliver
|D_route
) debug_printf("unique = %s\n", addr
->unique
);
5908 if (tree_search(tree_nonrecipients
, addr
->unique
) != NULL
)
5910 DEBUG(D_deliver
|D_route
)
5911 debug_printf("%s was previously delivered: discarded\n", addr
->unique
);
5912 child_done(addr
, tod_stamp(tod_log
));
5916 /* Get the routing retry status, saving the two retry keys (with and
5917 without the local part) for subsequent use. If there is no retry record for
5918 the standard address routing retry key, we look for the same key with the
5919 sender attached, because this form is used by the smtp transport after a
5920 4xx response to RCPT when address_retry_include_sender is true. */
5922 addr
->domain_retry_key
= string_sprintf("R:%s", addr
->domain
);
5923 addr
->address_retry_key
= string_sprintf("R:%s@%s", addr
->local_part
,
5926 if (dbm_file
== NULL
)
5927 domain_retry_record
= address_retry_record
= NULL
;
5930 domain_retry_record
= dbfn_read(dbm_file
, addr
->domain_retry_key
);
5931 if (domain_retry_record
!= NULL
&&
5932 now
- domain_retry_record
->time_stamp
> retry_data_expire
)
5933 domain_retry_record
= NULL
; /* Ignore if too old */
5935 address_retry_record
= dbfn_read(dbm_file
, addr
->address_retry_key
);
5936 if (address_retry_record
!= NULL
&&
5937 now
- address_retry_record
->time_stamp
> retry_data_expire
)
5938 address_retry_record
= NULL
; /* Ignore if too old */
5940 if (address_retry_record
== NULL
)
5942 uschar
*altkey
= string_sprintf("%s:<%s>", addr
->address_retry_key
,
5944 address_retry_record
= dbfn_read(dbm_file
, altkey
);
5945 if (address_retry_record
!= NULL
&&
5946 now
- address_retry_record
->time_stamp
> retry_data_expire
)
5947 address_retry_record
= NULL
; /* Ignore if too old */
5951 DEBUG(D_deliver
|D_retry
)
5953 if (domain_retry_record
== NULL
)
5954 debug_printf("no domain retry record\n");
5955 if (address_retry_record
== NULL
)
5956 debug_printf("no address retry record\n");
5959 /* If we are sending a message down an existing SMTP connection, we must
5960 assume that the message which created the connection managed to route
5961 an address to that connection. We do not want to run the risk of taking
5962 a long time over routing here, because if we do, the server at the other
5963 end of the connection may time it out. This is especially true for messages
5964 with lots of addresses. For this kind of delivery, queue_running is not
5965 set, so we would normally route all addresses. We take a pragmatic approach
5966 and defer routing any addresses that have any kind of domain retry record.
5967 That is, we don't even look at their retry times. It doesn't matter if this
5968 doesn't work occasionally. This is all just an optimization, after all.
5970 The reason for not doing the same for address retries is that they normally
5971 arise from 4xx responses, not DNS timeouts. */
5973 if (continue_hostname
!= NULL
&& domain_retry_record
!= NULL
)
5975 addr
->message
= US
"reusing SMTP connection skips previous routing defer";
5976 addr
->basic_errno
= ERRNO_RRETRY
;
5977 (void)post_process_one(addr
, DEFER
, LOG_MAIN
, DTYPE_ROUTER
, 0);
5980 /* If we are in a queue run, defer routing unless there is no retry data or
5981 we've passed the next retry time, or this message is forced. In other
5982 words, ignore retry data when not in a queue run.
5984 However, if the domain retry time has expired, always allow the routing
5985 attempt. If it fails again, the address will be failed. This ensures that
5986 each address is routed at least once, even after long-term routing
5989 If there is an address retry, check that too; just wait for the next
5990 retry time. This helps with the case when the temporary error on the
5991 address was really message-specific rather than address specific, since
5992 it allows other messages through.
5994 We also wait for the next retry time if this is a message sent down an
5995 existing SMTP connection (even though that will be forced). Otherwise there
5996 will be far too many attempts for an address that gets a 4xx error. In
5997 fact, after such an error, we should not get here because, the host should
5998 not be remembered as one this message needs. However, there was a bug that
5999 used to cause this to happen, so it is best to be on the safe side.
6001 Even if we haven't reached the retry time in the hints, there is one more
6002 check to do, which is for the ultimate address timeout. We only do this
6003 check if there is an address retry record and there is not a domain retry
6004 record; this implies that previous attempts to handle the address had the
6005 retry_use_local_parts option turned on. We use this as an approximation
6006 for the destination being like a local delivery, for example delivery over
6007 LMTP to an IMAP message store. In this situation users are liable to bump
6008 into their quota and thereby have intermittently successful deliveries,
6009 which keep the retry record fresh, which can lead to us perpetually
6010 deferring messages. */
6012 else if (((queue_running
&& !deliver_force
) || continue_hostname
!= NULL
)
6014 ((domain_retry_record
!= NULL
&&
6015 now
< domain_retry_record
->next_try
&&
6016 !domain_retry_record
->expired
)
6018 (address_retry_record
!= NULL
&&
6019 now
< address_retry_record
->next_try
))
6021 (domain_retry_record
!= NULL
||
6022 address_retry_record
== NULL
||
6023 !retry_ultimate_address_timeout(addr
->address_retry_key
,
6024 addr
->domain
, address_retry_record
, now
)))
6026 addr
->message
= US
"retry time not reached";
6027 addr
->basic_errno
= ERRNO_RRETRY
;
6028 (void)post_process_one(addr
, DEFER
, LOG_MAIN
, DTYPE_ROUTER
, 0);
6031 /* The domain is OK for routing. Remember if retry data exists so it
6032 can be cleaned up after a successful delivery. */
6036 if (domain_retry_record
!= NULL
|| address_retry_record
!= NULL
)
6037 setflag(addr
, af_dr_retry_exists
);
6038 addr
->next
= addr_route
;
6040 DEBUG(D_deliver
|D_route
)
6041 debug_printf("%s: queued for routing\n", addr
->address
);
6045 /* The database is closed while routing is actually happening. Requests to
6046 update it are put on a chain and all processed together at the end. */
6048 if (dbm_file
!= NULL
) dbfn_close(dbm_file
);
6050 /* If queue_domains is set, we don't even want to try routing addresses in
6051 those domains. During queue runs, queue_domains is forced to be unset.
6052 Optimize by skipping this pass through the addresses if nothing is set. */
6054 if (!deliver_force
&& queue_domains
!= NULL
)
6056 address_item
*okaddr
= NULL
;
6057 while (addr_route
!= NULL
)
6059 address_item
*addr
= addr_route
;
6060 addr_route
= addr
->next
;
6062 deliver_domain
= addr
->domain
; /* set $domain */
6063 if ((rc
= match_isinlist(addr
->domain
, &queue_domains
, 0,
6064 &domainlist_anchor
, addr
->domain_cache
, MCL_DOMAIN
, TRUE
, NULL
))
6069 addr
->basic_errno
= ERRNO_LISTDEFER
;
6070 addr
->message
= US
"queue_domains lookup deferred";
6071 (void)post_process_one(addr
, DEFER
, LOG_MAIN
, DTYPE_ROUTER
, 0);
6075 addr
->next
= okaddr
;
6081 addr
->basic_errno
= ERRNO_QUEUE_DOMAIN
;
6082 addr
->message
= US
"domain is in queue_domains";
6083 (void)post_process_one(addr
, DEFER
, LOG_MAIN
, DTYPE_ROUTER
, 0);
6087 addr_route
= okaddr
;
6090 /* Now route those addresses that are not deferred. */
6092 while (addr_route
!= NULL
)
6095 address_item
*addr
= addr_route
;
6096 uschar
*old_domain
= addr
->domain
;
6097 uschar
*old_unique
= addr
->unique
;
6098 addr_route
= addr
->next
;
6101 /* Just in case some router parameter refers to it. */
6103 return_path
= (addr
->p
.errors_address
!= NULL
)?
6104 addr
->p
.errors_address
: sender_address
;
6106 /* If a router defers an address, add a retry item. Whether or not to
6107 use the local part in the key is a property of the router. */
6109 if ((rc
= route_address(addr
, &addr_local
, &addr_remote
, &addr_new
,
6110 &addr_succeed
, v_none
)) == DEFER
)
6111 retry_add_item(addr
, (addr
->router
->retry_use_local_part
)?
6112 string_sprintf("R:%s@%s", addr
->local_part
, addr
->domain
) :
6113 string_sprintf("R:%s", addr
->domain
), 0);
6115 /* Otherwise, if there is an existing retry record in the database, add
6116 retry items to delete both forms. We must also allow for the possibility
6117 of a routing retry that includes the sender address. Since the domain might
6118 have been rewritten (expanded to fully qualified) as a result of routing,
6119 ensure that the rewritten form is also deleted. */
6121 else if (testflag(addr
, af_dr_retry_exists
))
6123 uschar
*altkey
= string_sprintf("%s:<%s>", addr
->address_retry_key
,
6125 retry_add_item(addr
, altkey
, rf_delete
);
6126 retry_add_item(addr
, addr
->address_retry_key
, rf_delete
);
6127 retry_add_item(addr
, addr
->domain_retry_key
, rf_delete
);
6128 if (Ustrcmp(addr
->domain
, old_domain
) != 0)
6129 retry_add_item(addr
, string_sprintf("R:%s", old_domain
), rf_delete
);
6132 /* DISCARD is given for :blackhole: and "seen finish". The event has been
6133 logged, but we need to ensure the address (and maybe parents) is marked
6138 address_done(addr
, tod_stamp(tod_log
));
6139 continue; /* route next address */
6142 /* The address is finished with (failed or deferred). */
6146 (void)post_process_one(addr
, rc
, LOG_MAIN
, DTYPE_ROUTER
, 0);
6147 continue; /* route next address */
6150 /* The address has been routed. If the router changed the domain, it will
6151 also have changed the unique address. We have to test whether this address
6152 has already been delivered, because it's the unique address that finally
6155 if (addr
->unique
!= old_unique
&&
6156 tree_search(tree_nonrecipients
, addr
->unique
) != 0)
6158 DEBUG(D_deliver
|D_route
) debug_printf("%s was previously delivered: "
6159 "discarded\n", addr
->address
);
6160 if (addr_remote
== addr
) addr_remote
= addr
->next
;
6161 else if (addr_local
== addr
) addr_local
= addr
->next
;
6164 /* If the router has same_domain_copy_routing set, we are permitted to copy
6165 the routing for any other addresses with the same domain. This is an
6166 optimisation to save repeated DNS lookups for "standard" remote domain
6167 routing. The option is settable only on routers that generate host lists.
6168 We play it very safe, and do the optimization only if the address is routed
6169 to a remote transport, there are no header changes, and the domain was not
6170 modified by the router. */
6172 if (addr_remote
== addr
&&
6173 addr
->router
->same_domain_copy_routing
&&
6174 addr
->p
.extra_headers
== NULL
&&
6175 addr
->p
.remove_headers
== NULL
&&
6176 old_domain
== addr
->domain
)
6178 address_item
**chain
= &addr_route
;
6179 while (*chain
!= NULL
)
6181 address_item
*addr2
= *chain
;
6182 if (Ustrcmp(addr2
->domain
, addr
->domain
) != 0)
6184 chain
= &(addr2
->next
);
6188 /* Found a suitable address; take it off the routing list and add it to
6189 the remote delivery list. */
6191 *chain
= addr2
->next
;
6192 addr2
->next
= addr_remote
;
6193 addr_remote
= addr2
;
6195 /* Copy the routing data */
6197 addr2
->domain
= addr
->domain
;
6198 addr2
->router
= addr
->router
;
6199 addr2
->transport
= addr
->transport
;
6200 addr2
->host_list
= addr
->host_list
;
6201 addr2
->fallback_hosts
= addr
->fallback_hosts
;
6202 addr2
->p
.errors_address
= addr
->p
.errors_address
;
6203 copyflag(addr2
, addr
, af_hide_child
| af_local_host_removed
);
6205 DEBUG(D_deliver
|D_route
)
6207 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6209 "Routing for %s copied from %s\n",
6210 addr2
->address
, addr2
->address
, addr
->address
);
6214 } /* Continue with routing the next address. */
6215 } /* Loop to process any child addresses that the routers created, and
6216 any rerouted addresses that got put back on the new chain. */
6219 /* Debugging: show the results of the routing */
6221 DEBUG(D_deliver
|D_retry
|D_route
)
6223 address_item
*p
= addr_local
;
6224 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6225 debug_printf("After routing:\n Local deliveries:\n");
6228 debug_printf(" %s\n", p
->address
);
6233 debug_printf(" Remote deliveries:\n");
6236 debug_printf(" %s\n", p
->address
);
6241 debug_printf(" Failed addresses:\n");
6244 debug_printf(" %s\n", p
->address
);
6249 debug_printf(" Deferred addresses:\n");
6252 debug_printf(" %s\n", p
->address
);
6257 /* Free any resources that were cached during routing. */
6262 /* These two variables are set only during routing, after check_local_user.
6263 Ensure they are not set in transports. */
6265 local_user_gid
= (gid_t
)(-1);
6266 local_user_uid
= (uid_t
)(-1);
6268 /* Check for any duplicate addresses. This check is delayed until after
6269 routing, because the flexibility of the routing configuration means that
6270 identical addresses with different parentage may end up being redirected to
6271 different addresses. Checking for duplicates too early (as we previously used
6272 to) makes this kind of thing not work. */
6274 do_duplicate_check(&addr_local
);
6275 do_duplicate_check(&addr_remote
);
6277 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
6278 remote transport. The check that they all end up in one transaction happens in
6279 the do_remote_deliveries() function. */
6281 if (mua_wrapper
&& (addr_local
!= NULL
|| addr_failed
!= NULL
||
6282 addr_defer
!= NULL
))
6285 uschar
*which
, *colon
, *msg
;
6287 if (addr_local
!= NULL
)
6292 else if (addr_defer
!= NULL
)
6295 which
= US
"deferred";
6303 while (addr
->parent
!= NULL
) addr
= addr
->parent
;
6305 if (addr
->message
!= NULL
)
6308 msg
= addr
->message
;
6310 else colon
= msg
= US
"";
6312 /* We don't need to log here for a forced failure as it will already
6313 have been logged. Defer will also have been logged, but as a defer, so we do
6314 need to do the failure logging. */
6316 if (addr
!= addr_failed
)
6317 log_write(0, LOG_MAIN
, "** %s routing yielded a %s delivery",
6318 addr
->address
, which
);
6320 /* Always write an error to the caller */
6322 fprintf(stderr
, "routing %s yielded a %s delivery%s%s\n", addr
->address
,
6325 final_yield
= DELIVER_MUA_FAILED
;
6326 addr_failed
= addr_defer
= NULL
; /* So that we remove the message */
6327 goto DELIVERY_TIDYUP
;
6331 /* If this is a run to continue deliveries to an external channel that is
6332 already set up, defer any local deliveries. */
6334 if (continue_transport
!= NULL
)
6336 if (addr_defer
== NULL
) addr_defer
= addr_local
; else
6338 address_item
*addr
= addr_defer
;
6339 while (addr
->next
!= NULL
) addr
= addr
->next
;
6340 addr
->next
= addr_local
;
6346 /* Because address rewriting can happen in the routers, we should not really do
6347 ANY deliveries until all addresses have been routed, so that all recipients of
6348 the message get the same headers. However, this is in practice not always
6349 possible, since sometimes remote addresses give DNS timeouts for days on end.
6350 The pragmatic approach is to deliver what we can now, saving any rewritten
6351 headers so that at least the next lot of recipients benefit from the rewriting
6352 that has already been done.
6354 If any headers have been rewritten during routing, update the spool file to
6355 remember them for all subsequent deliveries. This can be delayed till later if
6356 there is only address to be delivered - if it succeeds the spool write need not
6359 if (header_rewritten
&&
6360 ((addr_local
!= NULL
&&
6361 (addr_local
->next
!= NULL
|| addr_remote
!= NULL
)) ||
6362 (addr_remote
!= NULL
&& addr_remote
->next
!= NULL
)))
6364 /* Panic-dies on error */
6365 (void)spool_write_header(message_id
, SW_DELIVERING
, NULL
);
6366 header_rewritten
= FALSE
;
6370 /* If there are any deliveries to be done, open the journal file. This is used
6371 to record successful deliveries as soon as possible after each delivery is
6372 known to be complete. A file opened with O_APPEND is used so that several
6373 processes can run simultaneously.
6375 The journal is just insurance against crashes. When the spool file is
6376 ultimately updated at the end of processing, the journal is deleted. If a
6377 journal is found to exist at the start of delivery, the addresses listed
6378 therein are added to the non-recipients. */
6380 if (addr_local
!= NULL
|| addr_remote
!= NULL
)
6382 sprintf(CS spoolname
, "%s/input/%s/%s-J", spool_directory
, message_subdir
, id
);
6383 journal_fd
= Uopen(spoolname
, O_WRONLY
|O_APPEND
|O_CREAT
, SPOOL_MODE
);
6387 log_write(0, LOG_MAIN
|LOG_PANIC
, "Couldn't open journal file %s: %s",
6388 spoolname
, strerror(errno
));
6389 return DELIVER_NOT_ATTEMPTED
;
6392 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
6393 that the mode is correct - the group setting doesn't always seem to get
6394 set automatically. */
6396 if( fcntl(journal_fd
, F_SETFD
, fcntl(journal_fd
, F_GETFD
) | FD_CLOEXEC
)
6397 || fchown(journal_fd
, exim_uid
, exim_gid
)
6398 || fchmod(journal_fd
, SPOOL_MODE
)
6401 int ret
= Uunlink(spoolname
);
6402 log_write(0, LOG_MAIN
|LOG_PANIC
, "Couldn't set perms on journal file %s: %s",
6403 spoolname
, strerror(errno
));
6404 if(ret
&& errno
!= ENOENT
)
6405 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to unlink %s: %s",
6406 spoolname
, strerror(errno
));
6407 return DELIVER_NOT_ATTEMPTED
;
6413 /* Now we can get down to the business of actually doing deliveries. Local
6414 deliveries are done first, then remote ones. If ever the problems of how to
6415 handle fallback transports are figured out, this section can be put into a loop
6416 for handling fallbacks, though the uid switching will have to be revised. */
6418 /* Precompile a regex that is used to recognize a parameter in response
6419 to an LHLO command, if is isn't already compiled. This may be used on both
6420 local and remote LMTP deliveries. */
6422 if (regex_IGNOREQUOTA
== NULL
) regex_IGNOREQUOTA
=
6423 regex_must_compile(US
"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE
, TRUE
);
6425 /* Handle local deliveries */
6427 if (addr_local
!= NULL
)
6429 DEBUG(D_deliver
|D_transport
)
6430 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
6431 do_local_deliveries();
6432 disable_logging
= FALSE
;
6435 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
6436 so just queue them all. */
6438 if (queue_run_local
)
6440 while (addr_remote
!= NULL
)
6442 address_item
*addr
= addr_remote
;
6443 addr_remote
= addr
->next
;
6445 addr
->basic_errno
= ERRNO_LOCAL_ONLY
;
6446 addr
->message
= US
"remote deliveries suppressed";
6447 (void)post_process_one(addr
, DEFER
, LOG_MAIN
, DTYPE_TRANSPORT
, 0);
6451 /* Handle remote deliveries */
6453 if (addr_remote
!= NULL
)
6455 DEBUG(D_deliver
|D_transport
)
6456 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
6458 /* Precompile some regex that are used to recognize parameters in response
6459 to an EHLO command, if they aren't already compiled. */
6461 if (regex_PIPELINING
== NULL
) regex_PIPELINING
=
6462 regex_must_compile(US
"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE
, TRUE
);
6464 if (regex_SIZE
== NULL
) regex_SIZE
=
6465 regex_must_compile(US
"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE
, TRUE
);
6467 if (regex_AUTH
== NULL
) regex_AUTH
=
6468 regex_must_compile(US
"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
6472 if (regex_STARTTLS
== NULL
) regex_STARTTLS
=
6473 regex_must_compile(US
"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE
, TRUE
);
6476 #ifndef DISABLE_PRDR
6477 if (regex_PRDR
== NULL
) regex_PRDR
=
6478 regex_must_compile(US
"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE
, TRUE
);
6481 #ifdef EXPERIMENTAL_DSN
6482 /* Set the regex to check for DSN support on remote MTA */
6483 if (regex_DSN
== NULL
) regex_DSN
=
6484 regex_must_compile(US
"\\n250[\\s\\-]DSN(\\s|\\n|$)", FALSE
, TRUE
);
6487 /* Now sort the addresses if required, and do the deliveries. The yield of
6488 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
6489 cannot be delivered in one transaction. */
6491 if (remote_sort_domains
!= NULL
) sort_remote_deliveries();
6492 if (!do_remote_deliveries(FALSE
))
6494 log_write(0, LOG_MAIN
, "** mua_wrapper is set but recipients cannot all "
6495 "be delivered in one transaction");
6496 fprintf(stderr
, "delivery to smarthost failed (configuration problem)\n");
6498 final_yield
= DELIVER_MUA_FAILED
;
6499 addr_failed
= addr_defer
= NULL
; /* So that we remove the message */
6500 goto DELIVERY_TIDYUP
;
6503 /* See if any of the addresses that failed got put on the queue for delivery
6504 to their fallback hosts. We do it this way because often the same fallback
6505 host is used for many domains, so all can be sent in a single transaction
6506 (if appropriately configured). */
6508 if (addr_fallback
!= NULL
&& !mua_wrapper
)
6510 DEBUG(D_deliver
) debug_printf("Delivering to fallback hosts\n");
6511 addr_remote
= addr_fallback
;
6512 addr_fallback
= NULL
;
6513 if (remote_sort_domains
!= NULL
) sort_remote_deliveries();
6514 do_remote_deliveries(TRUE
);
6516 disable_logging
= FALSE
;
6520 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6521 phase, to minimize cases of half-done things. */
6524 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6526 /* Root privilege is no longer needed */
6528 exim_setugid(exim_uid
, exim_gid
, FALSE
, US
"post-delivery tidying");
6530 set_process_info("tidying up after delivering %s", message_id
);
6531 signal(SIGTERM
, SIG_IGN
);
6533 /* When we are acting as an MUA wrapper, the smtp transport will either have
6534 succeeded for all addresses, or failed them all in normal cases. However, there
6535 are some setup situations (e.g. when a named port does not exist) that cause an
6536 immediate exit with deferral of all addresses. Convert those into failures. We
6537 do not ever want to retry, nor do we want to send a bounce message. */
6541 if (addr_defer
!= NULL
)
6543 address_item
*addr
, *nextaddr
;
6544 for (addr
= addr_defer
; addr
!= NULL
; addr
= nextaddr
)
6546 log_write(0, LOG_MAIN
, "** %s mua_wrapper forced failure for deferred "
6547 "delivery", addr
->address
);
6548 nextaddr
= addr
->next
;
6549 addr
->next
= addr_failed
;
6555 /* Now all should either have succeeded or failed. */
6557 if (addr_failed
== NULL
) final_yield
= DELIVER_MUA_SUCCEEDED
; else
6559 uschar
*s
= (addr_failed
->user_message
!= NULL
)?
6560 addr_failed
->user_message
: addr_failed
->message
;
6563 fprintf(stderr
, "Delivery failed: ");
6564 if (addr_failed
->basic_errno
> 0)
6566 fprintf(stderr
, "%s", strerror(addr_failed
->basic_errno
));
6567 if (s
!= NULL
) fprintf(stderr
, ": ");
6569 if ((host
= addr_failed
->host_used
))
6570 fprintf(stderr
, "H=%s [%s]: ", host
->name
, host
->address
);
6573 if (addr_failed
->basic_errno
<= 0) fprintf(stderr
, "unknown error");
6575 else fprintf(stderr
, "%s", CS s
);
6576 fprintf(stderr
, "\n");
6578 final_yield
= DELIVER_MUA_FAILED
;
6583 /* In a normal configuration, we now update the retry database. This is done in
6584 one fell swoop at the end in order not to keep opening and closing (and
6585 locking) the database. The code for handling retries is hived off into a
6586 separate module for convenience. We pass it the addresses of the various
6587 chains, because deferred addresses can get moved onto the failed chain if the
6588 retry cutoff time has expired for all alternative destinations. Bypass the
6589 updating of the database if the -N flag is set, which is a debugging thing that
6590 prevents actual delivery. */
6592 else if (!dont_deliver
) retry_update(&addr_defer
, &addr_failed
, &addr_succeed
);
6594 #ifdef EXPERIMENTAL_DSN
6595 /* Send DSN for successful messages */
6596 addr_dsntmp
= addr_succeed
;
6597 addr_senddsn
= NULL
;
6599 while(addr_dsntmp
!= NULL
)
6602 debug_printf("DSN: processing router : %s\n", addr_dsntmp
->router
->name
);
6605 debug_printf("DSN: processing successful delivery address: %s\n", addr_dsntmp
->address
);
6607 /* af_ignore_error not honored here. it's not an error */
6609 DEBUG(D_deliver
) debug_printf("DSN: Sender_address: %s\n", sender_address
);
6610 DEBUG(D_deliver
) debug_printf("DSN: orcpt: %s flags: %d\n", addr_dsntmp
->dsn_orcpt
, addr_dsntmp
->dsn_flags
);
6611 DEBUG(D_deliver
) debug_printf("DSN: envid: %s ret: %d\n", dsn_envid
, dsn_ret
);
6612 DEBUG(D_deliver
) debug_printf("DSN: Final recipient: %s\n", addr_dsntmp
->address
);
6613 DEBUG(D_deliver
) debug_printf("DSN: Remote SMTP server supports DSN: %d\n", addr_dsntmp
->dsn_aware
);
6615 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
6616 and a report was requested */
6617 if (((addr_dsntmp
->dsn_aware
!= dsn_support_yes
) ||
6618 ((addr_dsntmp
->dsn_flags
& rf_dsnlasthop
) != 0))
6620 (((addr_dsntmp
->dsn_flags
& rf_dsnflags
) != 0) &&
6621 ((addr_dsntmp
->dsn_flags
& rf_notify_success
) != 0)))
6623 /* copy and relink address_item and send report with all of them at once later */
6624 address_item
*addr_next
;
6625 addr_next
= addr_senddsn
;
6626 addr_senddsn
= store_get(sizeof(address_item
));
6627 memcpy(addr_senddsn
, addr_dsntmp
, sizeof(address_item
));
6628 addr_senddsn
->next
= addr_next
;
6632 DEBUG(D_deliver
) debug_printf("DSN: *** NOT SENDING DSN SUCCESS Message ***\n");
6635 addr_dsntmp
= addr_dsntmp
->next
;
6638 if (addr_senddsn
!= NULL
)
6643 /* create exim process to send message */
6644 pid
= child_open_exim(&fd
);
6646 DEBUG(D_deliver
) debug_printf("DSN: child_open_exim returns: %d\n", pid
);
6648 if (pid
< 0) /* Creation of child failed */
6650 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Process %d (parent %d) failed to "
6651 "create child process to send failure message: %s", getpid(),
6652 getppid(), strerror(errno
));
6654 DEBUG(D_deliver
) debug_printf("DSN: child_open_exim failed\n");
6657 else /* Creation of child succeeded */
6659 FILE *f
= fdopen(fd
, "wb");
6660 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
6661 int topt
= topt_add_return_path
| topt_no_body
;
6662 uschar boundaryStr
[64];
6664 DEBUG(D_deliver
) debug_printf("sending error message to: %s\n", sender_address
);
6666 /* build unique id for MIME boundary */
6667 snprintf(boundaryStr
, sizeof(boundaryStr
)-1, TIME_T_FMT
"-eximdsn-%d",
6668 time(NULL
), rand());
6669 DEBUG(D_deliver
) debug_printf("DSN: MIME boundary: %s\n", boundaryStr
);
6671 if (errors_reply_to
)
6672 fprintf(f
, "Reply-To: %s\n", errors_reply_to
);
6674 fprintf(f
, "Auto-Submitted: auto-generated\n"
6675 "From: Mail Delivery System <Mailer-Daemon@%s>\n"
6677 "Subject: Delivery Status Notification\n"
6678 "Content-Type: multipart/report; report-type=delivery-status; boundary=%s\n"
6679 "MIME-Version: 1.0\n\n"
6682 "Content-type: text/plain; charset=us-ascii\n\n"
6684 "This message was created automatically by mail delivery software.\n"
6685 " ----- The following addresses had successful delivery notifications -----\n",
6686 qualify_domain_sender
, sender_address
, boundaryStr
, boundaryStr
);
6688 addr_dsntmp
= addr_senddsn
;
6691 fprintf(f
, "<%s> (relayed %s)\n\n",
6692 addr_dsntmp
->address
,
6693 (addr_dsntmp
->dsn_flags
& rf_dsnlasthop
) == 1
6694 ? "via non DSN router"
6695 : addr_dsntmp
->dsn_aware
== dsn_support_no
6696 ? "to non-DSN-aware mailer"
6697 : "via non \"Remote SMTP\" router"
6699 addr_dsntmp
= addr_dsntmp
->next
;
6702 "Content-type: message/delivery-status\n\n"
6703 "Reporting-MTA: dns; %s\n",
6704 boundaryStr
, smtp_active_hostname
);
6706 if (dsn_envid
!= NULL
) {
6707 /* must be decoded from xtext: see RFC 3461:6.3a */
6709 if (auth_xtextdecode(dsn_envid
, &xdec_envid
) > 0)
6710 fprintf(f
, "Original-Envelope-ID: %s\n", dsn_envid
);
6712 fprintf(f
, "X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
6716 for (addr_dsntmp
= addr_senddsn
;
6718 addr_dsntmp
= addr_dsntmp
->next
)
6720 if (addr_dsntmp
->dsn_orcpt
)
6721 fprintf(f
,"Original-Recipient: %s\n", addr_dsntmp
->dsn_orcpt
);
6723 fprintf(f
, "Action: delivered\n"
6724 "Final-Recipient: rfc822;%s\n"
6726 addr_dsntmp
->address
);
6728 if (addr_dsntmp
->host_used
&& addr_dsntmp
->host_used
->name
)
6729 fprintf(f
, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n",
6730 addr_dsntmp
->host_used
->name
);
6732 fprintf(f
,"Diagnostic-Code: X-Exim; relayed via non %s router\n",
6733 (addr_dsntmp
->dsn_flags
& rf_dsnlasthop
) == 1 ? "DSN" : "SMTP");
6737 fprintf(f
, "--%s\nContent-type: text/rfc822-headers\n\n", boundaryStr
);
6740 transport_filter_argv
= NULL
; /* Just in case */
6741 return_path
= sender_address
; /* In case not previously set */
6743 /* Write the original email out */
6744 transport_write_message(NULL
, fileno(f
), topt
, 0, NULL
, NULL
, NULL
, NULL
, NULL
, 0);
6748 fprintf(f
,"--%s--\n", boundaryStr
);
6752 rc
= child_close(pid
, 0); /* Waits for child to close, no timeout */
6755 #endif /*EXPERIMENTAL_DSN*/
6757 /* If any addresses failed, we must send a message to somebody, unless
6758 af_ignore_error is set, in which case no action is taken. It is possible for
6759 several messages to get sent if there are addresses with different
6762 while (addr_failed
!= NULL
)
6766 uschar
*logtod
= tod_stamp(tod_log
);
6768 address_item
*handled_addr
= NULL
;
6769 address_item
**paddr
;
6770 address_item
*msgchain
= NULL
;
6771 address_item
**pmsgchain
= &msgchain
;
6773 /* There are weird cases when logging is disabled in the transport. However,
6774 there may not be a transport (address failed by a router). */
6776 disable_logging
= FALSE
;
6777 if (addr_failed
->transport
!= NULL
)
6778 disable_logging
= addr_failed
->transport
->disable_logging
;
6781 debug_printf("processing failed address %s\n", addr_failed
->address
);
6783 /* There are only two ways an address in a bounce message can get here:
6785 (1) When delivery was initially deferred, but has now timed out (in the call
6786 to retry_update() above). We can detect this by testing for
6787 af_retry_timedout. If the address does not have its own errors address,
6788 we arrange to ignore the error.
6790 (2) If delivery failures for bounce messages are being ignored. We can detect
6791 this by testing for af_ignore_error. This will also be set if a bounce
6792 message has been autothawed and the ignore_bounce_errors_after time has
6793 passed. It might also be set if a router was explicitly configured to
6794 ignore errors (errors_to = "").
6796 If neither of these cases obtains, something has gone wrong. Log the
6797 incident, but then ignore the error. */
6799 if (sender_address
[0] == 0 && addr_failed
->p
.errors_address
== NULL
)
6801 if (!testflag(addr_failed
, af_retry_timedout
) &&
6802 !testflag(addr_failed
, af_ignore_error
))
6804 log_write(0, LOG_MAIN
|LOG_PANIC
, "internal error: bounce message "
6805 "failure is neither frozen nor ignored (it's been ignored)");
6807 setflag(addr_failed
, af_ignore_error
);
6810 /* If the first address on the list has af_ignore_error set, just remove
6811 it from the list, throw away any saved message file, log it, and
6812 mark the recipient done. */
6814 if (testflag(addr_failed
, af_ignore_error
)
6815 #ifdef EXPERIMENTAL_DSN
6816 || (((addr_failed
->dsn_flags
& rf_dsnflags
) != 0)
6817 && ((addr_failed
->dsn_flags
& rf_notify_failure
) != rf_notify_failure
))
6822 addr_failed
= addr
->next
;
6823 if (addr
->return_filename
!= NULL
) Uunlink(addr
->return_filename
);
6825 log_write(0, LOG_MAIN
, "%s%s%s%s: error ignored",
6827 (addr
->parent
== NULL
)? US
"" : US
" <",
6828 (addr
->parent
== NULL
)? US
"" : addr
->parent
->address
,
6829 (addr
->parent
== NULL
)? US
"" : US
">");
6831 address_done(addr
, logtod
);
6832 child_done(addr
, logtod
);
6833 /* Panic-dies on error */
6834 (void)spool_write_header(message_id
, SW_DELIVERING
, NULL
);
6837 /* Otherwise, handle the sending of a message. Find the error address for
6838 the first address, then send a message that includes all failed addresses
6839 that have the same error address. Note the bounce_recipient is a global so
6840 that it can be accesssed by $bounce_recipient while creating a customized
6845 bounce_recipient
= (addr_failed
->p
.errors_address
== NULL
)?
6846 sender_address
: addr_failed
->p
.errors_address
;
6848 /* Make a subprocess to send a message */
6850 pid
= child_open_exim(&fd
);
6852 /* Creation of child failed */
6855 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Process %d (parent %d) failed to "
6856 "create child process to send failure message: %s", getpid(),
6857 getppid(), strerror(errno
));
6859 /* Creation of child succeeded */
6866 uschar
*bcc
, *emf_text
;
6867 FILE *f
= fdopen(fd
, "wb");
6869 BOOL to_sender
= strcmpic(sender_address
, bounce_recipient
) == 0;
6870 int max
= (bounce_return_size_limit
/DELIVER_IN_BUFFER_SIZE
+ 1) *
6871 DELIVER_IN_BUFFER_SIZE
;
6872 #ifdef EXPERIMENTAL_DSN
6873 uschar boundaryStr
[64];
6874 uschar
*dsnlimitmsg
;
6875 uschar
*dsnnotifyhdr
;
6880 debug_printf("sending error message to: %s\n", bounce_recipient
);
6882 /* Scan the addresses for all that have the same errors address, removing
6883 them from the addr_failed chain, and putting them on msgchain. */
6885 paddr
= &addr_failed
;
6886 for (addr
= addr_failed
; addr
!= NULL
; addr
= *paddr
)
6888 if (Ustrcmp(bounce_recipient
, (addr
->p
.errors_address
== NULL
)?
6889 sender_address
: addr
->p
.errors_address
) != 0)
6891 paddr
= &(addr
->next
); /* Not the same; skip */
6893 else /* The same - dechain */
6895 *paddr
= addr
->next
;
6898 pmsgchain
= &(addr
->next
);
6902 /* Include X-Failed-Recipients: for automatic interpretation, but do
6903 not let any one header line get too long. We do this by starting a
6904 new header every 50 recipients. Omit any addresses for which the
6905 "hide_child" flag is set. */
6907 for (addr
= msgchain
; addr
!= NULL
; addr
= addr
->next
)
6909 if (testflag(addr
, af_hide_child
)) continue;
6916 (rcount
++ == 0)? "X-Failed-Recipients: " : ",\n ",
6917 (testflag(addr
, af_pfr
) && addr
->parent
!= NULL
)?
6918 string_printing(addr
->parent
->address
) :
6919 string_printing(addr
->address
));
6921 if (rcount
> 0) fprintf(f
, "\n");
6923 /* Output the standard headers */
6925 if (errors_reply_to
!= NULL
)
6926 fprintf(f
, "Reply-To: %s\n", errors_reply_to
);
6927 fprintf(f
, "Auto-Submitted: auto-replied\n");
6929 fprintf(f
, "To: %s\n", bounce_recipient
);
6931 #ifdef EXPERIMENTAL_DSN
6932 /* generate boundary string and output MIME-Headers */
6933 snprintf(boundaryStr
, sizeof(boundaryStr
)-1, TIME_T_FMT
"-eximdsn-%d",
6934 time(NULL
), rand());
6936 fprintf(f
, "Content-Type: multipart/report;"
6937 " report-type=delivery-status; boundary=%s\n"
6938 "MIME-Version: 1.0\n",
6942 /* Open a template file if one is provided. Log failure to open, but
6943 carry on - default texts will be used. */
6945 if (bounce_message_file
)
6946 if (!(emf
= Ufopen(bounce_message_file
, "rb")))
6947 log_write(0, LOG_MAIN
|LOG_PANIC
, "Failed to open %s for error "
6948 "message texts: %s", bounce_message_file
, strerror(errno
));
6950 /* Quietly copy to configured additional addresses if required. */
6952 if ((bcc
= moan_check_errorcopy(bounce_recipient
)))
6953 fprintf(f
, "Bcc: %s\n", bcc
);
6955 /* The texts for the message can be read from a template file; if there
6956 isn't one, or if it is too short, built-in texts are used. The first
6957 emf text is a Subject: and any other headers. */
6959 if ((emf_text
= next_emf(emf
, US
"header")))
6960 fprintf(f
, "%s\n", emf_text
);
6962 fprintf(f
, "Subject: Mail delivery failed%s\n\n",
6963 to_sender
? ": returning message to sender" : "");
6965 #ifdef EXPERIMENTAL_DSN
6966 /* output human readable part as text/plain section */
6968 "Content-type: text/plain; charset=us-ascii\n\n",
6972 if ((emf_text
= next_emf(emf
, US
"intro")))
6973 fprintf(f
, "%s", CS emf_text
);
6977 /* This message has been reworded several times. It seems to be confusing to
6978 somebody, however it is worded. I have retreated to the original, simple
6980 "This message was created automatically by mail delivery software.\n");
6982 if (bounce_message_text
)
6983 fprintf(f
, "%s", CS bounce_message_text
);
6986 "\nA message that you sent could not be delivered to one or more of its\n"
6987 "recipients. This is a permanent error. The following address(es) failed:\n");
6990 "\nA message sent by\n\n <%s>\n\n"
6991 "could not be delivered to one or more of its recipients. The following\n"
6992 "address(es) failed:\n", sender_address
);
6996 /* Process the addresses, leaving them on the msgchain if they have a
6997 file name for a return message. (There has already been a check in
6998 post_process_one() for the existence of data in the message file.) A TRUE
6999 return from print_address_information() means that the address is not
7003 for (addr
= msgchain
; addr
!= NULL
; addr
= *paddr
)
7005 if (print_address_information(addr
, f
, US
" ", US
"\n ", US
""))
7006 print_address_error(addr
, f
, US
"");
7008 /* End the final line for the address */
7012 /* Leave on msgchain if there's a return file. */
7014 if (addr
->return_file
>= 0)
7016 paddr
= &(addr
->next
);
7020 /* Else save so that we can tick off the recipient when the
7025 *paddr
= addr
->next
;
7026 addr
->next
= handled_addr
;
7027 handled_addr
= addr
;
7033 /* Get the next text, whether we need it or not, so as to be
7034 positioned for the one after. */
7036 emf_text
= next_emf(emf
, US
"generated text");
7038 /* If there were any file messages passed by the local transports,
7039 include them in the message. Then put the address on the handled chain.
7040 In the case of a batch of addresses that were all sent to the same
7041 transport, the return_file field in all of them will contain the same
7042 fd, and the return_filename field in the *last* one will be set (to the
7043 name of the file). */
7047 address_item
*nextaddr
;
7050 fprintf(f
, "%s", CS emf_text
);
7053 "The following text was generated during the delivery "
7054 "attempt%s:\n", (filecount
> 1)? "s" : "");
7056 for (addr
= msgchain
; addr
!= NULL
; addr
= nextaddr
)
7059 address_item
*topaddr
= addr
;
7061 /* List all the addresses that relate to this file */
7064 while(addr
) /* Insurance */
7066 print_address_information(addr
, f
, US
"------ ", US
"\n ",
7068 if (addr
->return_filename
) break;
7073 /* Now copy the file */
7075 fm
= Ufopen(addr
->return_filename
, "rb");
7078 fprintf(f
, " +++ Exim error... failed to open text file: %s\n",
7082 while ((ch
= fgetc(fm
)) != EOF
) fputc(ch
, f
);
7085 Uunlink(addr
->return_filename
);
7087 /* Can now add to handled chain, first fishing off the next
7088 address on the msgchain. */
7090 nextaddr
= addr
->next
;
7091 addr
->next
= handled_addr
;
7092 handled_addr
= topaddr
;
7097 #ifdef EXPERIMENTAL_DSN
7098 /* output machine readable part */
7100 "Content-type: message/delivery-status\n\n"
7101 "Reporting-MTA: dns; %s\n",
7102 boundaryStr
, smtp_active_hostname
);
7106 /* must be decoded from xtext: see RFC 3461:6.3a */
7108 if (auth_xtextdecode(dsn_envid
, &xdec_envid
) > 0)
7109 fprintf(f
, "Original-Envelope-ID: %s\n", dsn_envid
);
7111 fprintf(f
, "X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
7115 for (addr
= handled_addr
; addr
; addr
= addr
->next
)
7117 fprintf(f
, "Action: failed\n"
7118 "Final-Recipient: rfc822;%s\n"
7121 if (addr
->host_used
&& addr
->host_used
->name
)
7122 fprintf(f
, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; %d\n",
7123 addr
->host_used
->name
, addr
->basic_errno
);
7127 /* Now copy the message, trying to give an intelligible comment if
7128 it is too long for it all to be copied. The limit isn't strictly
7129 applied because of the buffering. There is, however, an option
7130 to suppress copying altogether. */
7132 emf_text
= next_emf(emf
, US
"copy");
7134 #ifndef EXPERIMENTAL_DSN
7135 if (bounce_return_message
)
7137 int topt
= topt_add_return_path
;
7138 if (!bounce_return_body
) topt
|= topt_no_body
;
7141 fprintf(f
, "%s", CS emf_text
);
7144 if (bounce_return_body
) fprintf(f
,
7145 "------ This is a copy of the message, including all the headers. ------\n");
7147 "------ This is a copy of the message's headers. ------\n");
7150 /* While reading the "truncated" message, set return_size_limit to
7151 the actual max testing value, rounded. We need to read the message
7152 whether we are going to use it or not. */
7155 int temp
= bounce_return_size_limit
;
7156 bounce_return_size_limit
= (max
/1000)*1000;
7157 emf_text
= next_emf(emf
, US
"truncated");
7158 bounce_return_size_limit
= temp
;
7161 if (bounce_return_body
&& bounce_return_size_limit
> 0)
7163 struct stat statbuf
;
7164 if (fstat(deliver_datafile
, &statbuf
) == 0 && statbuf
.st_size
> max
)
7167 fprintf(f
, "%s", CS emf_text
);
7170 "------ The body of the message is " OFF_T_FMT
" characters long; only the first\n"
7171 "------ %d or so are included here.\n", statbuf
.st_size
, max
);
7178 transport_filter_argv
= NULL
; /* Just in case */
7179 return_path
= sender_address
; /* In case not previously set */
7180 transport_write_message(NULL
, fileno(f
), topt
,
7181 bounce_return_size_limit
, NULL
, NULL
, NULL
, NULL
, NULL
, 0);
7184 /* Write final text and close the template file if one is open */
7188 if ((emf_text
= next_emf(emf
, US
"final")))
7189 fprintf(f
, "%s", CS emf_text
);
7194 we ignore the intro text from template and add
7195 the text for bounce_return_size_limit at the end.
7197 bounce_return_message is ignored
7198 in case RET= is defined we honor these values
7199 otherwise bounce_return_body is honored.
7201 bounce_return_size_limit is always honored.
7204 fprintf(f
, "\n--%s\n", boundaryStr
);
7206 dsnlimitmsg
= US
"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7207 dsnnotifyhdr
= NULL
;
7208 topt
= topt_add_return_path
;
7210 /* RET=HDRS? top priority */
7211 if (dsn_ret
== dsn_ret_hdrs
)
7212 topt
|= topt_no_body
;
7214 /* no full body return at all? */
7215 if (!bounce_return_body
)
7217 topt
|= topt_no_body
;
7218 /* add header if we overrule RET=FULL */
7219 if (dsn_ret
== dsn_ret_full
)
7220 dsnnotifyhdr
= dsnlimitmsg
;
7222 /* size limited ... return headers only if limit reached */
7223 else if (bounce_return_size_limit
> 0)
7225 struct stat statbuf
;
7226 if (fstat(deliver_datafile
, &statbuf
) == 0 && statbuf
.st_size
> max
)
7228 topt
|= topt_no_body
;
7229 dsnnotifyhdr
= dsnlimitmsg
;
7233 if (topt
& topt_no_body
)
7234 fprintf(f
,"Content-type: text/rfc822-headers\n\n");
7236 fprintf(f
,"Content-type: message/rfc822\n\n");
7239 transport_filter_argv
= NULL
; /* Just in case */
7240 return_path
= sender_address
; /* In case not previously set */
7241 transport_write_message(NULL
, fileno(f
), topt
,
7242 0, dsnnotifyhdr
, NULL
, NULL
, NULL
, NULL
, 0);
7245 /* we never add the final text. close the file */
7249 fprintf(f
, "\n--%s--\n", boundaryStr
);
7250 #endif /*EXPERIMENTAL_DSN*/
7252 /* Close the file, which should send an EOF to the child process
7253 that is receiving the message. Wait for it to finish. */
7256 rc
= child_close(pid
, 0); /* Waits for child to close, no timeout */
7258 /* In the test harness, let the child do it's thing first. */
7260 if (running_in_test_harness
) millisleep(500);
7262 /* If the process failed, there was some disaster in setting up the
7263 error message. Unless the message is very old, ensure that addr_defer
7264 is non-null, which will have the effect of leaving the message on the
7265 spool. The failed addresses will get tried again next time. However, we
7266 don't really want this to happen too often, so freeze the message unless
7267 there are some genuine deferred addresses to try. To do this we have
7268 to call spool_write_header() here, because with no genuine deferred
7269 addresses the normal code below doesn't get run. */
7274 if (now
- received_time
< retry_maximum_timeout
&& addr_defer
== NULL
)
7276 addr_defer
= (address_item
*)(+1);
7277 deliver_freeze
= TRUE
;
7278 deliver_frozen_at
= time(NULL
);
7279 /* Panic-dies on error */
7280 (void)spool_write_header(message_id
, SW_DELIVERING
, NULL
);
7283 deliver_msglog("Process failed (%d) when writing error message "
7284 "to %s%s", rc
, bounce_recipient
, s
);
7285 log_write(0, LOG_MAIN
, "Process failed (%d) when writing error message "
7286 "to %s%s", rc
, bounce_recipient
, s
);
7289 /* The message succeeded. Ensure that the recipients that failed are
7290 now marked finished with on the spool and their parents updated. */
7294 for (addr
= handled_addr
; addr
!= NULL
; addr
= addr
->next
)
7296 address_done(addr
, logtod
);
7297 child_done(addr
, logtod
);
7299 /* Panic-dies on error */
7300 (void)spool_write_header(message_id
, SW_DELIVERING
, NULL
);
7306 disable_logging
= FALSE
; /* In case left set */
7308 /* Come here from the mua_wrapper case if routing goes wrong */
7312 /* If there are now no deferred addresses, we are done. Preserve the
7313 message log if so configured, and we are using them. Otherwise, sling it.
7314 Then delete the message itself. */
7316 if (addr_defer
== NULL
)
7320 sprintf(CS spoolname
, "%s/msglog/%s/%s", spool_directory
, message_subdir
,
7322 if (preserve_message_logs
)
7325 sprintf(CS big_buffer
, "%s/msglog.OLD/%s", spool_directory
, id
);
7326 if ((rc
= Urename(spoolname
, big_buffer
)) < 0)
7328 (void)directory_make(spool_directory
, US
"msglog.OLD",
7329 MSGLOG_DIRECTORY_MODE
, TRUE
);
7330 rc
= Urename(spoolname
, big_buffer
);
7333 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to move %s to the "
7334 "msglog.OLD directory", spoolname
);
7338 if (Uunlink(spoolname
) < 0)
7339 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to unlink %s: %s",
7340 spoolname
, strerror(errno
));
7344 /* Remove the two message files. */
7346 sprintf(CS spoolname
, "%s/input/%s/%s-D", spool_directory
, message_subdir
, id
);
7347 if (Uunlink(spoolname
) < 0)
7348 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to unlink %s: %s",
7349 spoolname
, strerror(errno
));
7350 sprintf(CS spoolname
, "%s/input/%s/%s-H", spool_directory
, message_subdir
, id
);
7351 if (Uunlink(spoolname
) < 0)
7352 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to unlink %s: %s",
7353 spoolname
, strerror(errno
));
7355 /* Log the end of this message, with queue time if requested. */
7357 if ((log_extra_selector
& LX_queue_time_overall
) != 0)
7358 log_write(0, LOG_MAIN
, "Completed QT=%s",
7359 readconf_printtime( (int) ((long)time(NULL
) - (long)received_time
)) );
7361 log_write(0, LOG_MAIN
, "Completed");
7363 /* Unset deliver_freeze so that we won't try to move the spool files further down */
7364 deliver_freeze
= FALSE
;
7366 #ifdef EXPERIMENTAL_TPDA
7367 (void) tpda_raise_event(delivery_event_action
, US
"msg:complete", NULL
);
7371 /* If there are deferred addresses, we are keeping this message because it is
7372 not yet completed. Lose any temporary files that were catching output from
7373 pipes for any of the deferred addresses, handle one-time aliases, and see if
7374 the message has been on the queue for so long that it is time to send a warning
7375 message to the sender, unless it is a mailer-daemon. If all deferred addresses
7376 have the same domain, we can set deliver_domain for the expansion of
7377 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
7378 the parent's domain.
7380 If all the deferred addresses have an error number that indicates "retry time
7381 not reached", skip sending the warning message, because it won't contain the
7382 reason for the delay. It will get sent at the next real delivery attempt.
7383 However, if at least one address has tried, we'd better include all of them in
7386 If we can't make a process to send the message, don't worry.
7388 For mailing list expansions we want to send the warning message to the
7389 mailing list manager. We can't do a perfect job here, as some addresses may
7390 have different errors addresses, but if we take the errors address from
7391 each deferred address it will probably be right in most cases.
7393 If addr_defer == +1, it means there was a problem sending an error message
7394 for failed addresses, and there were no "real" deferred addresses. The value
7395 was set just to keep the message on the spool, so there is nothing to do here.
7398 else if (addr_defer
!= (address_item
*)(+1))
7401 uschar
*recipients
= US
"";
7402 BOOL delivery_attempted
= FALSE
;
7404 deliver_domain
= testflag(addr_defer
, af_pfr
)?
7405 addr_defer
->parent
->domain
: addr_defer
->domain
;
7407 for (addr
= addr_defer
; addr
!= NULL
; addr
= addr
->next
)
7409 address_item
*otaddr
;
7411 if (addr
->basic_errno
> ERRNO_RETRY_BASE
) delivery_attempted
= TRUE
;
7413 if (deliver_domain
!= NULL
)
7415 uschar
*d
= (testflag(addr
, af_pfr
))? addr
->parent
->domain
: addr
->domain
;
7417 /* The domain may be unset for an address that has never been routed
7418 because the system filter froze the message. */
7420 if (d
== NULL
|| Ustrcmp(d
, deliver_domain
) != 0) deliver_domain
= NULL
;
7423 if (addr
->return_filename
!= NULL
) Uunlink(addr
->return_filename
);
7425 /* Handle the case of one-time aliases. If any address in the ancestry
7426 of this one is flagged, ensure it is in the recipients list, suitably
7427 flagged, and that its parent is marked delivered. */
7429 for (otaddr
= addr
; otaddr
!= NULL
; otaddr
= otaddr
->parent
)
7430 if (otaddr
->onetime_parent
!= NULL
) break;
7435 int t
= recipients_count
;
7437 for (i
= 0; i
< recipients_count
; i
++)
7439 uschar
*r
= recipients_list
[i
].address
;
7440 if (Ustrcmp(otaddr
->onetime_parent
, r
) == 0) t
= i
;
7441 if (Ustrcmp(otaddr
->address
, r
) == 0) break;
7444 /* Didn't find the address already in the list, and did find the
7445 ultimate parent's address in the list. After adding the recipient,
7446 update the errors address in the recipients list. */
7448 if (i
>= recipients_count
&& t
< recipients_count
)
7450 DEBUG(D_deliver
) debug_printf("one_time: adding %s in place of %s\n",
7451 otaddr
->address
, otaddr
->parent
->address
);
7452 receive_add_recipient(otaddr
->address
, t
);
7453 recipients_list
[recipients_count
-1].errors_to
= otaddr
->p
.errors_address
;
7454 tree_add_nonrecipient(otaddr
->parent
->address
);
7455 update_spool
= TRUE
;
7459 /* Except for error messages, ensure that either the errors address for
7460 this deferred address or, if there is none, the sender address, is on the
7461 list of recipients for a warning message. */
7463 if (sender_address
[0] != 0)
7465 if (addr
->p
.errors_address
== NULL
)
7467 if (Ustrstr(recipients
, sender_address
) == NULL
)
7468 recipients
= string_sprintf("%s%s%s", recipients
,
7469 (recipients
[0] == 0)? "" : ",", sender_address
);
7473 if (Ustrstr(recipients
, addr
->p
.errors_address
) == NULL
)
7474 recipients
= string_sprintf("%s%s%s", recipients
,
7475 (recipients
[0] == 0)? "" : ",", addr
->p
.errors_address
);
7480 /* Send a warning message if the conditions are right. If the condition check
7481 fails because of a lookup defer, there is nothing we can do. The warning
7482 is not sent. Another attempt will be made at the next delivery attempt (if
7485 if (!queue_2stage
&& delivery_attempted
&&
7486 #ifdef EXPERIMENTAL_DSN
7487 (((addr_defer
->dsn_flags
& rf_dsnflags
) == 0) ||
7488 (addr_defer
->dsn_flags
& rf_notify_delay
) == rf_notify_delay
) &&
7490 delay_warning
[1] > 0 && sender_address
[0] != 0 &&
7491 (delay_warning_condition
== NULL
||
7492 expand_check_condition(delay_warning_condition
,
7493 US
"delay_warning", US
"option")))
7497 int queue_time
= time(NULL
) - received_time
;
7499 /* When running in the test harness, there's an option that allows us to
7500 fudge this time so as to get repeatability of the tests. Take the first
7501 time off the list. In queue runs, the list pointer gets updated in the
7504 if (running_in_test_harness
&& fudged_queue_times
[0] != 0)
7506 int qt
= readconf_readtime(fudged_queue_times
, '/', FALSE
);
7509 DEBUG(D_deliver
) debug_printf("fudged queue_times = %s\n",
7510 fudged_queue_times
);
7515 /* See how many warnings we should have sent by now */
7517 for (count
= 0; count
< delay_warning
[1]; count
++)
7518 if (queue_time
< delay_warning
[count
+2]) break;
7520 show_time
= delay_warning
[count
+1];
7522 if (count
>= delay_warning
[1])
7525 int last_gap
= show_time
;
7526 if (count
> 1) last_gap
-= delay_warning
[count
];
7527 extra
= (queue_time
- delay_warning
[count
+1])/last_gap
;
7528 show_time
+= last_gap
* extra
;
7534 debug_printf("time on queue = %s\n", readconf_printtime(queue_time
));
7535 debug_printf("warning counts: required %d done %d\n", count
,
7539 /* We have computed the number of warnings there should have been by now.
7540 If there haven't been enough, send one, and up the count to what it should
7543 if (warning_count
< count
)
7547 pid_t pid
= child_open_exim(&fd
);
7553 FILE *f
= fdopen(fd
, "wb");
7554 #ifdef EXPERIMENTAL_DSN
7555 uschar boundaryStr
[64];
7558 if (warn_message_file
)
7560 wmf
= Ufopen(warn_message_file
, "rb");
7562 log_write(0, LOG_MAIN
|LOG_PANIC
, "Failed to open %s for warning "
7563 "message texts: %s", warn_message_file
, strerror(errno
));
7566 warnmsg_recipients
= recipients
;
7567 warnmsg_delay
= (queue_time
< 120*60)?
7568 string_sprintf("%d minutes", show_time
/60):
7569 string_sprintf("%d hours", show_time
/3600);
7571 if (errors_reply_to
)
7572 fprintf(f
, "Reply-To: %s\n", errors_reply_to
);
7573 fprintf(f
, "Auto-Submitted: auto-replied\n");
7575 fprintf(f
, "To: %s\n", recipients
);
7577 #ifdef EXPERIMENTAL_DSN
7578 /* generated boundary string and output MIME-Headers */
7579 snprintf(boundaryStr
, sizeof(boundaryStr
)-1,
7580 TIME_T_FMT
"-eximdsn-%d", time(NULL
), rand());
7582 fprintf(f
, "Content-Type: multipart/report;"
7583 " report-type=delivery-status; boundary=%s\n"
7584 "MIME-Version: 1.0\n",
7588 if ((wmf_text
= next_emf(wmf
, US
"header")))
7589 fprintf(f
, "%s\n", wmf_text
);
7591 fprintf(f
, "Subject: Warning: message %s delayed %s\n\n",
7592 message_id
, warnmsg_delay
);
7594 #ifdef EXPERIMENTAL_DSN
7595 /* output human readable part as text/plain section */
7597 "Content-type: text/plain; charset=us-ascii\n\n",
7601 if ((wmf_text
= next_emf(wmf
, US
"intro")))
7602 fprintf(f
, "%s", CS wmf_text
);
7606 "This message was created automatically by mail delivery software.\n");
7608 if (Ustrcmp(recipients
, sender_address
) == 0)
7610 "A message that you sent has not yet been delivered to one or more of its\n"
7611 "recipients after more than ");
7615 "A message sent by\n\n <%s>\n\n"
7616 "has not yet been delivered to one or more of its recipients after more than \n",
7619 fprintf(f
, "%s on the queue on %s.\n\n"
7620 "The message identifier is: %s\n",
7621 warnmsg_delay
, primary_hostname
, message_id
);
7623 for (h
= header_list
; h
!= NULL
; h
= h
->next
)
7624 if (strncmpic(h
->text
, US
"Subject:", 8) == 0)
7625 fprintf(f
, "The subject of the message is: %s", h
->text
+ 9);
7626 else if (strncmpic(h
->text
, US
"Date:", 5) == 0)
7627 fprintf(f
, "The date of the message is: %s", h
->text
+ 6);
7630 fprintf(f
, "The address%s to which the message has not yet been "
7632 !addr_defer
->next
? "" : "es",
7633 !addr_defer
->next
? "is": "are");
7636 /* List the addresses, with error information if allowed */
7638 #ifdef EXPERIMENTAL_DSN
7639 /* store addr_defer for machine readable part */
7640 address_item
*addr_dsndefer
= addr_defer
;
7645 address_item
*addr
= addr_defer
;
7646 addr_defer
= addr
->next
;
7647 if (print_address_information(addr
, f
, US
" ", US
"\n ", US
""))
7648 print_address_error(addr
, f
, US
"Delay reason: ");
7657 if ((wmf_text
= next_emf(wmf
, US
"final")))
7658 fprintf(f
, "%s", CS wmf_text
);
7664 "No action is required on your part. Delivery attempts will continue for\n"
7665 "some time, and this warning may be repeated at intervals if the message\n"
7666 "remains undelivered. Eventually the mail delivery software will give up,\n"
7667 "and when that happens, the message will be returned to you.\n");
7670 #ifdef EXPERIMENTAL_DSN
7671 /* output machine readable part */
7672 fprintf(f
, "\n--%s\n"
7673 "Content-type: message/delivery-status\n\n"
7674 "Reporting-MTA: dns; %s\n",
7676 smtp_active_hostname
);
7681 /* must be decoded from xtext: see RFC 3461:6.3a */
7683 if (auth_xtextdecode(dsn_envid
, &xdec_envid
) > 0)
7684 fprintf(f
,"Original-Envelope-ID: %s\n", dsn_envid
);
7686 fprintf(f
,"X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
7690 while (addr_dsndefer
)
7692 if (addr_dsndefer
->dsn_orcpt
)
7693 fprintf(f
,"Original-Recipient: %s\n", addr_dsndefer
->dsn_orcpt
);
7695 fprintf(f
,"Action: delayed\n");
7696 fprintf(f
,"Final-Recipient: rfc822;%s\n", addr_dsndefer
->address
);
7697 fprintf(f
,"Status: 4.0.0\n");
7698 if (addr_dsndefer
->host_used
&& addr_dsndefer
->host_used
->name
)
7699 fprintf(f
,"Remote-MTA: dns; %s\nDiagnostic-Code: smtp; %d\n",
7700 addr_dsndefer
->host_used
->name
, addr_dsndefer
->basic_errno
);
7701 addr_dsndefer
= addr_dsndefer
->next
;
7704 fprintf(f
, "\n--%s\n"
7705 "Content-type: text/rfc822-headers\n\n",
7709 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7710 int topt
= topt_add_return_path
| topt_no_body
;
7711 transport_filter_argv
= NULL
; /* Just in case */
7712 return_path
= sender_address
; /* In case not previously set */
7713 /* Write the original email out */
7714 transport_write_message(NULL
, fileno(f
), topt
, 0, NULL
, NULL
, NULL
, NULL
, NULL
, 0);
7717 fprintf(f
,"\n--%s--\n", boundaryStr
);
7720 #endif /*EXPERIMENTAL_DSN*/
7722 /* Close and wait for child process to complete, without a timeout.
7723 If there's an error, don't update the count. */
7726 if (child_close(pid
, 0) == 0)
7728 warning_count
= count
;
7729 update_spool
= TRUE
; /* Ensure spool rewritten */
7735 /* Clear deliver_domain */
7737 deliver_domain
= NULL
;
7739 /* If this was a first delivery attempt, unset the first time flag, and
7740 ensure that the spool gets updated. */
7742 if (deliver_firsttime
)
7744 deliver_firsttime
= FALSE
;
7745 update_spool
= TRUE
;
7748 /* If delivery was frozen and freeze_tell is set, generate an appropriate
7749 message, unless the message is a local error message (to avoid loops). Then
7750 log the freezing. If the text in "frozen_info" came from a system filter,
7751 it has been escaped into printing characters so as not to mess up log lines.
7752 For the "tell" message, we turn \n back into newline. Also, insert a newline
7753 near the start instead of the ": " string. */
7757 if (freeze_tell
!= NULL
&& freeze_tell
[0] != 0 && !local_error_message
)
7759 uschar
*s
= string_copy(frozen_info
);
7760 uschar
*ss
= Ustrstr(s
, " by the system filter: ");
7771 if (*ss
== '\\' && ss
[1] == 'n')
7778 moan_tell_someone(freeze_tell
, addr_defer
, US
"Message frozen",
7779 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id
,
7783 /* Log freezing just before we update the -H file, to minimize the chance
7784 of a race problem. */
7786 deliver_msglog("*** Frozen%s\n", frozen_info
);
7787 log_write(0, LOG_MAIN
, "Frozen%s", frozen_info
);
7790 /* If there have been any updates to the non-recipients list, or other things
7791 that get written to the spool, we must now update the spool header file so
7792 that it has the right information for the next delivery attempt. If there
7793 was more than one address being delivered, the header_change update is done
7794 earlier, in case one succeeds and then something crashes. */
7797 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
7798 update_spool
, header_rewritten
);
7800 if (update_spool
|| header_rewritten
)
7801 /* Panic-dies on error */
7802 (void)spool_write_header(message_id
, SW_DELIVERING
, NULL
);
7805 /* Finished with the message log. If the message is complete, it will have
7806 been unlinked or renamed above. */
7808 if (message_logs
) (void)fclose(message_log
);
7810 /* Now we can close and remove the journal file. Its only purpose is to record
7811 successfully completed deliveries asap so that this information doesn't get
7812 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
7813 not serious, as trying it again is not harmful. The journal might not be open
7814 if all addresses were deferred at routing or directing. Nevertheless, we must
7815 remove it if it exists (may have been lying around from a crash during the
7816 previous delivery attempt). We don't remove the journal if a delivery
7817 subprocess failed to pass back delivery information; this is controlled by
7818 the remove_journal flag. When the journal is left, we also don't move the
7819 message off the main spool if frozen and the option is set. It should get moved
7820 at the next attempt, after the journal has been inspected. */
7822 if (journal_fd
>= 0) (void)close(journal_fd
);
7826 sprintf(CS spoolname
, "%s/input/%s/%s-J", spool_directory
, message_subdir
, id
);
7827 if (Uunlink(spoolname
) < 0 && errno
!= ENOENT
)
7828 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to unlink %s: %s", spoolname
,
7831 /* Move the message off the spool if reqested */
7833 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
7834 if (deliver_freeze
&& move_frozen_messages
)
7835 (void)spool_move_message(id
, message_subdir
, US
"", US
"F");
7839 /* Closing the data file frees the lock; if the file has been unlinked it
7840 will go away. Otherwise the message becomes available for another process
7843 (void)close(deliver_datafile
);
7844 deliver_datafile
= -1;
7845 DEBUG(D_deliver
) debug_printf("end delivery of %s\n", id
);
7847 /* It is unlikely that there will be any cached resources, since they are
7848 released after routing, and in the delivery subprocesses. However, it's
7849 possible for an expansion for something afterwards (for example,
7850 expand_check_condition) to do a lookup. We must therefore be sure everything is
7854 acl_where
= ACL_WHERE_UNKNOWN
;
7860 /* End of deliver.c */