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059ec3d9 PH |
1 | /* $Cambridge: exim/src/src/deliver.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */ |
2 | ||
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
7 | /* Copyright (c) University of Cambridge 1995 - 2004 */ | |
8 | /* See the file NOTICE for conditions of use and distribution. */ | |
9 | ||
10 | /* The main code for delivering a message. */ | |
11 | ||
12 | ||
13 | #include "exim.h" | |
14 | ||
15 | ||
16 | /* Data block for keeping track of subprocesses for parallel remote | |
17 | delivery. */ | |
18 | ||
19 | typedef struct pardata { | |
20 | address_item *addrlist; /* chain of addresses */ | |
21 | address_item *addr; /* next address data expected for */ | |
22 | pid_t pid; /* subprocess pid */ | |
23 | int fd; /* pipe fd for getting result from subprocess */ | |
24 | int transport_count; /* returned transport count value */ | |
25 | BOOL done; /* no more data needed */ | |
26 | uschar *msg; /* error message */ | |
27 | uschar *return_path; /* return_path for these addresses */ | |
28 | } pardata; | |
29 | ||
30 | /* Values for the process_recipients variable */ | |
31 | ||
32 | enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER, | |
33 | RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT, | |
34 | RECIP_FAIL_LOOP}; | |
35 | ||
36 | /* Mutually recursive functions for marking addresses done. */ | |
37 | ||
38 | static void child_done(address_item *, uschar *); | |
39 | static void address_done(address_item *, uschar *); | |
40 | ||
41 | /* Table for turning base-62 numbers into binary */ | |
42 | ||
43 | static uschar tab62[] = | |
44 | {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */ | |
45 | 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */ | |
46 | 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */ | |
47 | 33,34,35, 0, 0, 0, 0, 0, /* X-Z */ | |
48 | 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */ | |
49 | 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */ | |
50 | 59,60,61}; /* x-z */ | |
51 | ||
52 | ||
53 | /************************************************* | |
54 | * Local static variables * | |
55 | *************************************************/ | |
56 | ||
57 | /* addr_duplicate is global because it needs to be seen from the Envelope-To | |
58 | writing code. */ | |
59 | ||
60 | static address_item *addr_defer = NULL; | |
61 | static address_item *addr_failed = NULL; | |
62 | static address_item *addr_fallback = NULL; | |
63 | static address_item *addr_local = NULL; | |
64 | static address_item *addr_new = NULL; | |
65 | static address_item *addr_remote = NULL; | |
66 | static address_item *addr_route = NULL; | |
67 | static address_item *addr_succeed = NULL; | |
68 | ||
69 | static FILE *message_log = NULL; | |
70 | static BOOL update_spool; | |
71 | static BOOL remove_journal; | |
72 | static int parcount = 0; | |
73 | static pardata *parlist = NULL; | |
74 | static int return_count; | |
75 | static uschar *frozen_info = US""; | |
76 | static uschar *used_return_path = NULL; | |
77 | ||
78 | static uschar spoolname[PATH_MAX]; | |
79 | ||
80 | ||
81 | ||
82 | /************************************************* | |
83 | * Make a new address item * | |
84 | *************************************************/ | |
85 | ||
86 | /* This function gets the store and initializes with default values. The | |
87 | transport_return value defaults to DEFER, so that any unexpected failure to | |
88 | deliver does not wipe out the message. The default unique string is set to a | |
89 | copy of the address, so that its domain can be lowercased. | |
90 | ||
91 | Argument: | |
92 | address the RFC822 address string | |
93 | copy force a copy of the address | |
94 | ||
95 | Returns: a pointer to an initialized address_item | |
96 | */ | |
97 | ||
98 | address_item * | |
99 | deliver_make_addr(uschar *address, BOOL copy) | |
100 | { | |
101 | address_item *addr = store_get(sizeof(address_item)); | |
102 | *addr = address_defaults; | |
103 | if (copy) address = string_copy(address); | |
104 | addr->address = address; | |
105 | addr->unique = string_copy(address); | |
106 | return addr; | |
107 | } | |
108 | ||
109 | ||
110 | ||
111 | ||
112 | /************************************************* | |
113 | * Set expansion values for an address * | |
114 | *************************************************/ | |
115 | ||
116 | /* Certain expansion variables are valid only when handling an address or | |
117 | address list. This function sets them up or clears the values, according to its | |
118 | argument. | |
119 | ||
120 | Arguments: | |
121 | addr the address in question, or NULL to clear values | |
122 | Returns: nothing | |
123 | */ | |
124 | ||
125 | void | |
126 | deliver_set_expansions(address_item *addr) | |
127 | { | |
128 | if (addr == NULL) | |
129 | { | |
130 | uschar ***p = address_expansions; | |
131 | while (*p != NULL) **p++ = NULL; | |
132 | return; | |
133 | } | |
134 | ||
135 | /* Exactly what gets set depends on whether there is one or more addresses, and | |
136 | what they contain. These first ones are always set, taking their values from | |
137 | the first address. */ | |
138 | ||
139 | if (addr->host_list == NULL) | |
140 | { | |
141 | deliver_host = deliver_host_address = US""; | |
142 | } | |
143 | else | |
144 | { | |
145 | deliver_host = addr->host_list->name; | |
146 | deliver_host_address = addr->host_list->address; | |
147 | } | |
148 | ||
149 | deliver_recipients = addr; | |
150 | deliver_address_data = addr->p.address_data; | |
151 | deliver_domain_data = addr->p.domain_data; | |
152 | deliver_localpart_data = addr->p.localpart_data; | |
153 | ||
154 | /* These may be unset for multiple addresses */ | |
155 | ||
156 | deliver_domain = addr->domain; | |
157 | self_hostname = addr->self_hostname; | |
158 | ||
159 | /* If there's only one address we can set everything. */ | |
160 | ||
161 | if (addr->next == NULL) | |
162 | { | |
163 | address_item *addr_orig; | |
164 | ||
165 | deliver_localpart = addr->local_part; | |
166 | deliver_localpart_prefix = addr->prefix; | |
167 | deliver_localpart_suffix = addr->suffix; | |
168 | ||
169 | for (addr_orig = addr; addr_orig->parent != NULL; | |
170 | addr_orig = addr_orig->parent); | |
171 | deliver_domain_orig = addr_orig->domain; | |
172 | ||
173 | /* Re-instate any prefix and suffix in the original local part. In all | |
174 | normal cases, the address will have a router associated with it, and we can | |
175 | choose the caseful or caseless version accordingly. However, when a system | |
176 | filter sets up a pipe, file, or autoreply delivery, no router is involved. | |
177 | In this case, though, there won't be any prefix or suffix to worry about. */ | |
178 | ||
179 | deliver_localpart_orig = (addr_orig->router == NULL)? addr_orig->local_part : | |
180 | addr_orig->router->caseful_local_part? | |
181 | addr_orig->cc_local_part : addr_orig->lc_local_part; | |
182 | ||
183 | /* If there's a parent, make its domain and local part available, and if | |
184 | delivering to a pipe or file, or sending an autoreply, get the local | |
185 | part from the parent. For pipes and files, put the pipe or file string | |
186 | into address_pipe and address_file. */ | |
187 | ||
188 | if (addr->parent != NULL) | |
189 | { | |
190 | deliver_domain_parent = addr->parent->domain; | |
191 | deliver_localpart_parent = (addr->parent->router == NULL)? | |
192 | addr->parent->local_part : | |
193 | addr->parent->router->caseful_local_part? | |
194 | addr->parent->cc_local_part : addr->parent->lc_local_part; | |
195 | ||
196 | /* File deliveries have their own flag because they need to be picked out | |
197 | as special more often. */ | |
198 | ||
199 | if (testflag(addr, af_pfr)) | |
200 | { | |
201 | if (testflag(addr, af_file)) address_file = addr->local_part; | |
202 | else if (deliver_localpart[0] == '|') address_pipe = addr->local_part; | |
203 | deliver_localpart = addr->parent->local_part; | |
204 | deliver_localpart_prefix = addr->parent->prefix; | |
205 | deliver_localpart_suffix = addr->parent->suffix; | |
206 | } | |
207 | } | |
208 | } | |
209 | ||
210 | /* For multiple addresses, don't set local part, and leave the domain and | |
211 | self_hostname set only if it is the same for all of them. */ | |
212 | ||
213 | else | |
214 | { | |
215 | address_item *addr2; | |
216 | for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next) | |
217 | { | |
218 | if (deliver_domain != NULL && | |
219 | Ustrcmp(deliver_domain, addr2->domain) != 0) | |
220 | deliver_domain = NULL; | |
221 | if (self_hostname != NULL && (addr2->self_hostname == NULL || | |
222 | Ustrcmp(self_hostname, addr2->self_hostname) != 0)) | |
223 | self_hostname = NULL; | |
224 | if (deliver_domain == NULL && self_hostname == NULL) break; | |
225 | } | |
226 | } | |
227 | } | |
228 | ||
229 | ||
230 | ||
231 | ||
232 | /************************************************* | |
233 | * Open a msglog file * | |
234 | *************************************************/ | |
235 | ||
236 | /* This function is used both for normal message logs, and for files in the | |
237 | msglog directory that are used to catch output from pipes. Try to create the | |
238 | directory if it does not exist. From release 4.21, normal message logs should | |
239 | be created when the message is received. | |
240 | ||
241 | Argument: | |
242 | filename the file name | |
243 | mode the mode required | |
244 | error used for saying what failed | |
245 | ||
246 | Returns: a file descriptor, or -1 (with errno set) | |
247 | */ | |
248 | ||
249 | static int | |
250 | open_msglog_file(uschar *filename, int mode, uschar **error) | |
251 | { | |
252 | int fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode); | |
253 | ||
254 | if (fd < 0 && errno == ENOENT) | |
255 | { | |
256 | uschar temp[16]; | |
257 | sprintf(CS temp, "msglog/%s", message_subdir); | |
258 | if (message_subdir[0] == 0) temp[6] = 0; | |
259 | (void)directory_make(spool_directory, temp, MSGLOG_DIRECTORY_MODE, TRUE); | |
260 | fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode); | |
261 | } | |
262 | ||
263 | /* Set the close-on-exec flag and change the owner to the exim uid/gid (this | |
264 | function is called as root). Double check the mode, because the group setting | |
265 | doesn't always get set automatically. */ | |
266 | ||
267 | if (fd >= 0) | |
268 | { | |
269 | fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); | |
270 | if (fchown(fd, exim_uid, exim_gid) < 0) | |
271 | { | |
272 | *error = US"chown"; | |
273 | return -1; | |
274 | } | |
275 | if (fchmod(fd, mode) < 0) | |
276 | { | |
277 | *error = US"chmod"; | |
278 | return -1; | |
279 | } | |
280 | } | |
281 | else *error = US"create"; | |
282 | ||
283 | return fd; | |
284 | } | |
285 | ||
286 | ||
287 | ||
288 | ||
289 | /************************************************* | |
290 | * Write to msglog if required * | |
291 | *************************************************/ | |
292 | ||
293 | /* Write to the message log, if configured. This function may also be called | |
294 | from transports. | |
295 | ||
296 | Arguments: | |
297 | format a string format | |
298 | ||
299 | Returns: nothing | |
300 | */ | |
301 | ||
302 | void | |
303 | deliver_msglog(const char *format, ...) | |
304 | { | |
305 | va_list ap; | |
306 | if (!message_logs) return; | |
307 | va_start(ap, format); | |
308 | vfprintf(message_log, format, ap); | |
309 | fflush(message_log); | |
310 | va_end(ap); | |
311 | } | |
312 | ||
313 | ||
314 | ||
315 | ||
316 | /************************************************* | |
317 | * Replicate status for batch * | |
318 | *************************************************/ | |
319 | ||
320 | /* When a transport handles a batch of addresses, it may treat them | |
321 | individually, or it may just put the status in the first one, and return FALSE, | |
322 | requesting that the status be copied to all the others externally. This is the | |
323 | replication function. As well as the status, it copies the transport pointer, | |
324 | which may have changed if appendfile passed the addresses on to a different | |
325 | transport. | |
326 | ||
327 | Argument: pointer to the first address in a chain | |
328 | Returns: nothing | |
329 | */ | |
330 | ||
331 | static void | |
332 | replicate_status(address_item *addr) | |
333 | { | |
334 | address_item *addr2; | |
335 | for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next) | |
336 | { | |
337 | addr2->transport = addr->transport; | |
338 | addr2->transport_return = addr->transport_return; | |
339 | addr2->basic_errno = addr->basic_errno; | |
340 | addr2->more_errno = addr->more_errno; | |
341 | addr2->special_action = addr->special_action; | |
342 | addr2->message = addr->message; | |
343 | addr2->user_message = addr->user_message; | |
344 | } | |
345 | } | |
346 | ||
347 | ||
348 | ||
349 | /************************************************* | |
350 | * Compare lists of hosts * | |
351 | *************************************************/ | |
352 | ||
353 | /* This function is given two pointers to chains of host items, and it yields | |
354 | TRUE if the lists refer to the same hosts in the same order, except that | |
355 | ||
356 | (1) Multiple hosts with the same non-negative MX values are permitted to appear | |
357 | in different orders. Round-robinning nameservers can cause this to happen. | |
358 | ||
359 | (2) Multiple hosts with the same negative MX values less than MX_NONE are also | |
360 | permitted to appear in different orders. This is caused by randomizing | |
361 | hosts lists. | |
362 | ||
363 | This enables Exim to use a single SMTP transaction for sending to two entirely | |
364 | different domains that happen to end up pointing at the same hosts. | |
365 | ||
366 | Arguments: | |
367 | one points to the first host list | |
368 | two points to the second host list | |
369 | ||
370 | Returns: TRUE if the lists refer to the same host set | |
371 | */ | |
372 | ||
373 | static BOOL | |
374 | same_hosts(host_item *one, host_item *two) | |
375 | { | |
376 | while (one != NULL && two != NULL) | |
377 | { | |
378 | if (Ustrcmp(one->name, two->name) != 0) | |
379 | { | |
380 | int mx = one->mx; | |
381 | host_item *end_one = one; | |
382 | host_item *end_two = two; | |
383 | ||
384 | /* Batch up only if there was no MX and the list was not randomized */ | |
385 | ||
386 | if (mx == MX_NONE) return FALSE; | |
387 | ||
388 | /* Find the ends of the shortest sequence of identical MX values */ | |
389 | ||
390 | while (end_one->next != NULL && end_one->next->mx == mx && | |
391 | end_two->next != NULL && end_two->next->mx == mx) | |
392 | { | |
393 | end_one = end_one->next; | |
394 | end_two = end_two->next; | |
395 | } | |
396 | ||
397 | /* If there aren't any duplicates, there's no match. */ | |
398 | ||
399 | if (end_one == one) return FALSE; | |
400 | ||
401 | /* For each host in the 'one' sequence, check that it appears in the 'two' | |
402 | sequence, returning FALSE if not. */ | |
403 | ||
404 | for (;;) | |
405 | { | |
406 | host_item *hi; | |
407 | for (hi = two; hi != end_two->next; hi = hi->next) | |
408 | if (Ustrcmp(one->name, hi->name) == 0) break; | |
409 | if (hi == end_two->next) return FALSE; | |
410 | if (one == end_one) break; | |
411 | one = one->next; | |
412 | } | |
413 | ||
414 | /* All the hosts in the 'one' sequence were found in the 'two' sequence. | |
415 | Ensure both are pointing at the last host, and carry on as for equality. */ | |
416 | ||
417 | two = end_two; | |
418 | } | |
419 | ||
420 | /* Hosts matched */ | |
421 | ||
422 | one = one->next; | |
423 | two = two->next; | |
424 | } | |
425 | ||
426 | /* True if both are NULL */ | |
427 | ||
428 | return (one == two); | |
429 | } | |
430 | ||
431 | ||
432 | ||
433 | /************************************************* | |
434 | * Compare header lines * | |
435 | *************************************************/ | |
436 | ||
437 | /* This function is given two pointers to chains of header items, and it yields | |
438 | TRUE if they are the same header texts in the same order. | |
439 | ||
440 | Arguments: | |
441 | one points to the first header list | |
442 | two points to the second header list | |
443 | ||
444 | Returns: TRUE if the lists refer to the same header set | |
445 | */ | |
446 | ||
447 | static BOOL | |
448 | same_headers(header_line *one, header_line *two) | |
449 | { | |
450 | for (;;) | |
451 | { | |
452 | if (one == two) return TRUE; /* Includes the case where both NULL */ | |
453 | if (one == NULL || two == NULL) return FALSE; | |
454 | if (Ustrcmp(one->text, two->text) != 0) return FALSE; | |
455 | one = one->next; | |
456 | two = two->next; | |
457 | } | |
458 | } | |
459 | ||
460 | ||
461 | ||
462 | /************************************************* | |
463 | * Compare string settings * | |
464 | *************************************************/ | |
465 | ||
466 | /* This function is given two pointers to strings, and it returns | |
467 | TRUE if they are the same pointer, or if the two strings are the same. | |
468 | ||
469 | Arguments: | |
470 | one points to the first string | |
471 | two points to the second string | |
472 | ||
473 | Returns: TRUE or FALSE | |
474 | */ | |
475 | ||
476 | static BOOL | |
477 | same_strings(uschar *one, uschar *two) | |
478 | { | |
479 | if (one == two) return TRUE; /* Includes the case where both NULL */ | |
480 | if (one == NULL || two == NULL) return FALSE; | |
481 | return (Ustrcmp(one, two) == 0); | |
482 | } | |
483 | ||
484 | ||
485 | ||
486 | /************************************************* | |
487 | * Compare uid/gid for addresses * | |
488 | *************************************************/ | |
489 | ||
490 | /* This function is given a transport and two addresses. It yields TRUE if the | |
491 | uid/gid/initgroups settings for the two addresses are going to be the same when | |
492 | they are delivered. | |
493 | ||
494 | Arguments: | |
495 | tp the transort | |
496 | addr1 the first address | |
497 | addr2 the second address | |
498 | ||
499 | Returns: TRUE or FALSE | |
500 | */ | |
501 | ||
502 | static BOOL | |
503 | same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2) | |
504 | { | |
505 | if (!tp->uid_set && tp->expand_uid == NULL && !tp->deliver_as_creator) | |
506 | { | |
507 | if (testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set) || | |
508 | (testflag(addr1, af_uid_set) && | |
509 | (addr1->uid != addr2->uid || | |
510 | testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)))) | |
511 | return FALSE; | |
512 | } | |
513 | ||
514 | if (!tp->gid_set && tp->expand_gid == NULL) | |
515 | { | |
516 | if (testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set) || | |
517 | (testflag(addr1, af_gid_set) && addr1->gid != addr2->gid)) | |
518 | return FALSE; | |
519 | } | |
520 | ||
521 | return TRUE; | |
522 | } | |
523 | ||
524 | ||
525 | ||
526 | ||
527 | /************************************************* | |
528 | * Record that an address is complete * | |
529 | *************************************************/ | |
530 | ||
531 | /* This function records that an address is complete. This is straightforward | |
532 | for most addresses, where the unique address is just the full address with the | |
533 | domain lower cased. For homonyms (addresses that are the same as one of their | |
534 | ancestors) their are complications. Their unique addresses have \x\ prepended | |
535 | (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and | |
536 | cousins. | |
537 | ||
538 | Exim used to record the unique addresses of homonyms as "complete". This, | |
539 | however, fails when the pattern of redirection varies over time (e.g. if taking | |
540 | unseen copies at only some times of day) because the prepended numbers may vary | |
541 | from one delivery run to the next. This problem is solved by never recording | |
542 | prepended unique addresses as complete. Instead, when a homonymic address has | |
543 | actually been delivered via a transport, we record its basic unique address | |
544 | followed by the name of the transport. This is checked in subsequent delivery | |
545 | runs whenever an address is routed to a transport. | |
546 | ||
547 | If the completed address is a top-level one (has no parent, which means it | |
548 | cannot be homonymic) we also add the original address to the non-recipients | |
549 | tree, so that it gets recorded in the spool file and therefore appears as | |
550 | "done" in any spool listings. The original address may differ from the unique | |
551 | address in the case of the domain. | |
552 | ||
553 | Finally, this function scans the list of duplicates, marks as done any that | |
554 | match this address, and calls child_done() for their ancestors. | |
555 | ||
556 | Arguments: | |
557 | addr address item that has been completed | |
558 | now current time as a string | |
559 | ||
560 | Returns: nothing | |
561 | */ | |
562 | ||
563 | static void | |
564 | address_done(address_item *addr, uschar *now) | |
565 | { | |
566 | address_item *dup; | |
567 | ||
568 | update_spool = TRUE; /* Ensure spool gets updated */ | |
569 | ||
570 | /* Top-level address */ | |
571 | ||
572 | if (addr->parent == NULL) | |
573 | { | |
574 | tree_add_nonrecipient(addr->unique); | |
575 | tree_add_nonrecipient(addr->address); | |
576 | } | |
577 | ||
578 | /* Homonymous child address */ | |
579 | ||
580 | else if (testflag(addr, af_homonym)) | |
581 | { | |
582 | if (addr->transport != NULL) | |
583 | { | |
584 | tree_add_nonrecipient( | |
585 | string_sprintf("%s/%s", addr->unique + 3, addr->transport->name)); | |
586 | } | |
587 | } | |
588 | ||
589 | /* Non-homonymous child address */ | |
590 | ||
591 | else tree_add_nonrecipient(addr->unique); | |
592 | ||
593 | /* Check the list of duplicate addresses and ensure they are now marked | |
594 | done as well. */ | |
595 | ||
596 | for (dup = addr_duplicate; dup != NULL; dup = dup->next) | |
597 | { | |
598 | if (Ustrcmp(addr->unique, dup->unique) == 0) | |
599 | { | |
600 | tree_add_nonrecipient(dup->address); | |
601 | child_done(dup, now); | |
602 | } | |
603 | } | |
604 | } | |
605 | ||
606 | ||
607 | ||
608 | ||
609 | /************************************************* | |
610 | * Decrease counts in parents and mark done * | |
611 | *************************************************/ | |
612 | ||
613 | /* This function is called when an address is complete. If there is a parent | |
614 | address, its count of children is decremented. If there are still other | |
615 | children outstanding, the function exits. Otherwise, if the count has become | |
616 | zero, address_done() is called to mark the parent and its duplicates complete. | |
617 | Then loop for any earlier ancestors. | |
618 | ||
619 | Arguments: | |
620 | addr points to the completed address item | |
621 | now the current time as a string, for writing to the message log | |
622 | ||
623 | Returns: nothing | |
624 | */ | |
625 | ||
626 | static void | |
627 | child_done(address_item *addr, uschar *now) | |
628 | { | |
629 | address_item *aa; | |
630 | while (addr->parent != NULL) | |
631 | { | |
632 | addr = addr->parent; | |
633 | if ((addr->child_count -= 1) > 0) return; /* Incomplete parent */ | |
634 | address_done(addr, now); | |
635 | ||
636 | /* Log the completion of all descendents only when there is no ancestor with | |
637 | the same original address. */ | |
638 | ||
639 | for (aa = addr->parent; aa != NULL; aa = aa->parent) | |
640 | if (Ustrcmp(aa->address, addr->address) == 0) break; | |
641 | if (aa != NULL) continue; | |
642 | ||
643 | deliver_msglog("%s %s: children all complete\n", now, addr->address); | |
644 | DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address); | |
645 | } | |
646 | } | |
647 | ||
648 | ||
649 | ||
650 | ||
651 | /************************************************* | |
652 | * Actions at the end of handling an address * | |
653 | *************************************************/ | |
654 | ||
655 | /* This is a function for processing a single address when all that can be done | |
656 | with it has been done. | |
657 | ||
658 | Arguments: | |
659 | addr points to the address block | |
660 | result the result of the delivery attempt | |
661 | logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC) | |
662 | driver_type indicates which type of driver (transport, or router) was last | |
663 | to process the address | |
664 | logchar '=' or '-' for use when logging deliveries with => or -> | |
665 | ||
666 | Returns: nothing | |
667 | */ | |
668 | ||
669 | static void | |
670 | post_process_one(address_item *addr, int result, int logflags, int driver_type, | |
671 | int logchar) | |
672 | { | |
673 | uschar *now = tod_stamp(tod_log); | |
674 | uschar *driver_kind = NULL; | |
675 | uschar *driver_name = NULL; | |
676 | uschar *log_address; | |
677 | ||
678 | int size = 256; /* Used for a temporary, */ | |
679 | int ptr = 0; /* expanding buffer, for */ | |
680 | uschar *s; /* building log lines; */ | |
681 | void *reset_point; /* released afterwards. */ | |
682 | ||
683 | ||
684 | DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result); | |
685 | ||
686 | /* Set up driver kind and name for logging. Disable logging if the router or | |
687 | transport has disabled it. */ | |
688 | ||
689 | if (driver_type == DTYPE_TRANSPORT) | |
690 | { | |
691 | if (addr->transport != NULL) | |
692 | { | |
693 | driver_name = addr->transport->name; | |
694 | driver_kind = US" transport"; | |
695 | disable_logging = addr->transport->disable_logging; | |
696 | } | |
697 | else driver_kind = US"transporting"; | |
698 | } | |
699 | else if (driver_type == DTYPE_ROUTER) | |
700 | { | |
701 | if (addr->router != NULL) | |
702 | { | |
703 | driver_name = addr->router->name; | |
704 | driver_kind = US" router"; | |
705 | disable_logging = addr->router->disable_logging; | |
706 | } | |
707 | else driver_kind = US"routing"; | |
708 | } | |
709 | ||
710 | /* If there's an error message set, ensure that it contains only printing | |
711 | characters - it should, but occasionally things slip in and this at least | |
712 | stops the log format from getting wrecked. */ | |
713 | ||
714 | if (addr->message != NULL) addr->message = string_printing(addr->message); | |
715 | ||
716 | /* If we used a transport that has one of the "return_output" options set, and | |
717 | if it did in fact generate some output, then for return_output we treat the | |
718 | message as failed if it was not already set that way, so that the output gets | |
719 | returned to the sender, provided there is a sender to send it to. For | |
720 | return_fail_output, do this only if the delivery failed. Otherwise we just | |
721 | unlink the file, and remove the name so that if the delivery failed, we don't | |
722 | try to send back an empty or unwanted file. The log_output options operate only | |
723 | on a non-empty file. | |
724 | ||
725 | In any case, we close the message file, because we cannot afford to leave a | |
726 | file-descriptor for one address while processing (maybe very many) others. */ | |
727 | ||
728 | if (addr->return_file >= 0 && addr->return_filename != NULL) | |
729 | { | |
730 | BOOL return_output = FALSE; | |
731 | struct stat statbuf; | |
732 | fsync(addr->return_file); | |
733 | ||
734 | /* If there is no output, do nothing. */ | |
735 | ||
736 | if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0) | |
737 | { | |
738 | transport_instance *tb = addr->transport; | |
739 | ||
740 | /* Handle logging options */ | |
741 | ||
742 | if (tb->log_output || (result == FAIL && tb->log_fail_output) || | |
743 | (result == DEFER && tb->log_defer_output)) | |
744 | { | |
745 | uschar *s; | |
746 | FILE *f = Ufopen(addr->return_filename, "rb"); | |
747 | if (f == NULL) | |
748 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output " | |
749 | "from %s transport: %s", addr->return_filename, tb->name, | |
750 | strerror(errno)); | |
751 | else | |
752 | { | |
753 | s = US Ufgets(big_buffer, big_buffer_size, f); | |
754 | if (s != NULL) | |
755 | { | |
756 | uschar *p = big_buffer + Ustrlen(big_buffer); | |
757 | while (p > big_buffer && isspace(p[-1])) p--; | |
758 | *p = 0; | |
759 | s = string_printing(big_buffer); | |
760 | log_write(0, LOG_MAIN, "<%s>: %s transport output: %s", | |
761 | addr->address, tb->name, s); | |
762 | } | |
763 | fclose(f); | |
764 | } | |
765 | } | |
766 | ||
767 | /* Handle returning options, but only if there is an address to return | |
768 | the text to. */ | |
769 | ||
770 | if (sender_address[0] != 0 || addr->p.errors_address != NULL) | |
771 | { | |
772 | if (tb->return_output) | |
773 | { | |
774 | addr->transport_return = result = FAIL; | |
775 | if (addr->basic_errno == 0 && addr->message == NULL) | |
776 | addr->message = US"return message generated"; | |
777 | return_output = TRUE; | |
778 | } | |
779 | else | |
780 | if (tb->return_fail_output && result == FAIL) return_output = TRUE; | |
781 | } | |
782 | } | |
783 | ||
784 | /* Get rid of the file unless it might be returned, but close it in | |
785 | all cases. */ | |
786 | ||
787 | if (!return_output) | |
788 | { | |
789 | Uunlink(addr->return_filename); | |
790 | addr->return_filename = NULL; | |
791 | addr->return_file = -1; | |
792 | } | |
793 | ||
794 | close(addr->return_file); | |
795 | } | |
796 | ||
797 | /* Create the address string for logging. Must not do this earlier, because | |
798 | an OK result may be changed to FAIL when a pipe returns text. */ | |
799 | ||
800 | log_address = string_log_address(addr, | |
801 | (log_write_selector & L_all_parents) != 0, result == OK); | |
802 | ||
803 | /* The sucess case happens only after delivery by a transport. */ | |
804 | ||
805 | if (result == OK) | |
806 | { | |
807 | addr->next = addr_succeed; | |
808 | addr_succeed = addr; | |
809 | ||
810 | /* Call address_done() to ensure that we don't deliver to this address again, | |
811 | and write appropriate things to the message log. If it is a child address, we | |
812 | call child_done() to scan the ancestors and mark them complete if this is the | |
813 | last child to complete. */ | |
814 | ||
815 | address_done(addr, now); | |
816 | DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address); | |
817 | ||
818 | if (addr->parent == NULL) | |
819 | { | |
820 | deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address, | |
821 | driver_name, driver_kind); | |
822 | } | |
823 | else | |
824 | { | |
825 | deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address, | |
826 | addr->parent->address, driver_name, driver_kind); | |
827 | child_done(addr, now); | |
828 | } | |
829 | ||
830 | /* Log the delivery on the main log. We use an extensible string to build up | |
831 | the log line, and reset the store afterwards. Remote deliveries should always | |
832 | have a pointer to the host item that succeeded; local deliveries can have a | |
833 | pointer to a single host item in their host list, for use by the transport. */ | |
834 | ||
835 | s = reset_point = store_get(size); | |
836 | s[ptr++] = logchar; | |
837 | ||
838 | s = string_append(s, &size, &ptr, 2, US"> ", log_address); | |
839 | ||
840 | if ((log_extra_selector & LX_sender_on_delivery) != 0) | |
841 | s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">"); | |
842 | ||
843 | /* You might think that the return path must always be set for a successful | |
844 | delivery; indeed, I did for some time, until this statement crashed. The case | |
845 | when it is not set is for a delivery to /dev/null which is optimised by not | |
846 | being run at all. */ | |
847 | ||
848 | if (used_return_path != NULL && | |
849 | (log_extra_selector & LX_return_path_on_delivery) != 0) | |
850 | s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">"); | |
851 | ||
852 | /* For a delivery from a system filter, there may not be a router */ | |
853 | ||
854 | if (addr->router != NULL) | |
855 | s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name); | |
856 | ||
857 | s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name); | |
858 | ||
859 | if ((log_extra_selector & LX_delivery_size) != 0) | |
860 | s = string_append(s, &size, &ptr, 2, US" S=", | |
861 | string_sprintf("%d", transport_count)); | |
862 | ||
863 | /* Local delivery */ | |
864 | ||
865 | if (addr->transport->info->local) | |
866 | { | |
867 | if (addr->host_list != NULL) | |
868 | s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name); | |
869 | if (addr->shadow_message != NULL) | |
870 | s = string_cat(s, &size, &ptr, addr->shadow_message, | |
871 | Ustrlen(addr->shadow_message)); | |
872 | } | |
873 | ||
874 | /* Remote delivery */ | |
875 | ||
876 | else | |
877 | { | |
878 | if (addr->host_used != NULL) | |
879 | { | |
880 | s = string_append(s, &size, &ptr, 5, US" H=", addr->host_used->name, | |
881 | US" [", addr->host_used->address, US"]"); | |
882 | if ((log_extra_selector & LX_outgoing_port) != 0) | |
883 | s = string_append(s, &size, &ptr, 2, US":", string_sprintf("%d", | |
884 | addr->host_used->port)); | |
885 | if (continue_sequence > 1) | |
886 | s = string_cat(s, &size, &ptr, US"*", 1); | |
887 | } | |
888 | ||
889 | #ifdef SUPPORT_TLS | |
890 | if ((log_extra_selector & LX_tls_cipher) != 0 && addr->cipher != NULL) | |
891 | s = string_append(s, &size, &ptr, 2, US" X=", addr->cipher); | |
892 | if ((log_extra_selector & LX_tls_certificate_verified) != 0 && | |
893 | addr->cipher != NULL) | |
894 | s = string_append(s, &size, &ptr, 2, US" CV=", | |
895 | testflag(addr, af_cert_verified)? "yes":"no"); | |
896 | if ((log_extra_selector & LX_tls_peerdn) != 0 && addr->peerdn != NULL) | |
897 | s = string_append(s, &size, &ptr, 3, US" DN=\"", addr->peerdn, US"\""); | |
898 | #endif | |
899 | ||
900 | if ((log_extra_selector & LX_smtp_confirmation) != 0 && | |
901 | addr->message != NULL) | |
902 | { | |
903 | int i; | |
904 | uschar *p = big_buffer; | |
905 | uschar *ss = addr->message; | |
906 | *p++ = '\"'; | |
907 | for (i = 0; i < 100 && ss[i] != 0; i++) | |
908 | { | |
909 | if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; | |
910 | *p++ = ss[i]; | |
911 | } | |
912 | *p++ = '\"'; | |
913 | *p = 0; | |
914 | s = string_append(s, &size, &ptr, 2, US" C=", big_buffer); | |
915 | } | |
916 | } | |
917 | ||
918 | /* Time on queue and actual time taken to deliver */ | |
919 | ||
920 | if ((log_extra_selector & LX_queue_time) != 0) | |
921 | { | |
922 | s = string_append(s, &size, &ptr, 2, US" QT=", | |
923 | readconf_printtime(time(NULL) - received_time)); | |
924 | } | |
925 | ||
926 | if ((log_extra_selector & LX_deliver_time) != 0) | |
927 | { | |
928 | s = string_append(s, &size, &ptr, 2, US" DT=", | |
929 | readconf_printtime(addr->more_errno)); | |
930 | } | |
931 | ||
932 | /* string_cat() always leaves room for the terminator. Release the | |
933 | store we used to build the line after writing it. */ | |
934 | ||
935 | s[ptr] = 0; | |
936 | log_write(0, LOG_MAIN, "%s", s); | |
937 | store_reset(reset_point); | |
938 | } | |
939 | ||
940 | ||
941 | /* Soft failure, or local delivery process failed; freezing may be | |
942 | requested. */ | |
943 | ||
944 | else if (result == DEFER || result == PANIC) | |
945 | { | |
946 | if (result == PANIC) logflags |= LOG_PANIC; | |
947 | ||
948 | /* This puts them on the chain in reverse order. Do not change this, because | |
949 | the code for handling retries assumes that the one with the retry | |
950 | information is last. */ | |
951 | ||
952 | addr->next = addr_defer; | |
953 | addr_defer = addr; | |
954 | ||
955 | /* The only currently implemented special action is to freeze the | |
956 | message. Logging of this is done later, just before the -H file is | |
957 | updated. */ | |
958 | ||
959 | if (addr->special_action == SPECIAL_FREEZE) | |
960 | { | |
961 | deliver_freeze = TRUE; | |
962 | deliver_frozen_at = time(NULL); | |
963 | update_spool = TRUE; | |
964 | } | |
965 | ||
966 | /* If doing a 2-stage queue run, we skip writing to either the message | |
967 | log or the main log for SMTP defers. */ | |
968 | ||
969 | if (!queue_2stage || addr->basic_errno != 0) | |
970 | { | |
971 | uschar ss[32]; | |
972 | ||
973 | /* For errors of the type "retry time not reached" (also remotes skipped | |
974 | on queue run), logging is controlled by L_retry_defer. Note that this kind | |
975 | of error number is negative, and all the retry ones are less than any | |
976 | others. */ | |
977 | ||
978 | unsigned int use_log_selector = (addr->basic_errno <= ERRNO_RETRY_BASE)? | |
979 | L_retry_defer : 0; | |
980 | ||
981 | /* Build up the line that is used for both the message log and the main | |
982 | log. */ | |
983 | ||
984 | s = reset_point = store_get(size); | |
985 | s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address)); | |
986 | ||
987 | /* Either driver_name contains something and driver_kind contains | |
988 | " router" or " transport" (note the leading space), or driver_name is | |
989 | a null string and driver_kind contains "routing" without the leading | |
990 | space, if all routing has been deferred. When a domain has been held, | |
991 | so nothing has been done at all, both variables contain null strings. */ | |
992 | ||
993 | if (driver_name == NULL) | |
994 | { | |
995 | if (driver_kind != NULL) | |
996 | s = string_append(s, &size, &ptr, 2, US" ", driver_kind); | |
997 | } | |
998 | else | |
999 | { | |
1000 | if (driver_kind[1] == 't' && addr->router != NULL) | |
1001 | s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name); | |
1002 | Ustrcpy(ss, " ?="); | |
1003 | ss[1] = toupper(driver_kind[1]); | |
1004 | s = string_append(s, &size, &ptr, 2, ss, driver_name); | |
1005 | } | |
1006 | ||
1007 | sprintf(CS ss, " defer (%d)", addr->basic_errno); | |
1008 | s = string_cat(s, &size, &ptr, ss, Ustrlen(ss)); | |
1009 | ||
1010 | if (addr->basic_errno > 0) | |
1011 | s = string_append(s, &size, &ptr, 2, US": ", | |
1012 | US strerror(addr->basic_errno)); | |
1013 | ||
1014 | if (addr->message != NULL) | |
1015 | s = string_append(s, &size, &ptr, 2, US": ", addr->message); | |
1016 | ||
1017 | s[ptr] = 0; | |
1018 | ||
1019 | /* Log the deferment in the message log, but don't clutter it | |
1020 | up with retry-time defers after the first delivery attempt. */ | |
1021 | ||
1022 | if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE) | |
1023 | deliver_msglog("%s %s\n", now, s); | |
1024 | ||
1025 | /* Write the main log and reset the store */ | |
1026 | ||
1027 | log_write(use_log_selector, logflags, "== %s", s); | |
1028 | store_reset(reset_point); | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | ||
1033 | /* Hard failure. If there is an address to which an error message can be sent, | |
1034 | put this address on the failed list. If not, put it on the deferred list and | |
1035 | freeze the mail message for human attention. The latter action can also be | |
1036 | explicitly requested by a router or transport. */ | |
1037 | ||
1038 | else | |
1039 | { | |
1040 | /* If this is a delivery error, or a message for which no replies are | |
1041 | wanted, and the message's age is greater than ignore_bounce_errors_after, | |
1042 | force the af_ignore_error flag. This will cause the address to be discarded | |
1043 | later (with a log entry). */ | |
1044 | ||
1045 | if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after) | |
1046 | setflag(addr, af_ignore_error); | |
1047 | ||
1048 | /* Freeze the message if requested, or if this is a bounce message (or other | |
1049 | message with null sender). However, don't freeze if errors are being ignored. | |
1050 | The actual code to ignore occurs later, instead of sending a message. Logging | |
1051 | of freezing occurs later, just before writing the -H file. */ | |
1052 | ||
1053 | if (!testflag(addr, af_ignore_error) && | |
1054 | (addr->special_action == SPECIAL_FREEZE || sender_address[0] == 0)) | |
1055 | { | |
1056 | frozen_info = (addr->special_action == SPECIAL_FREEZE)? US"" : | |
1057 | (sender_local && !local_error_message)? | |
1058 | US" (message created with -f <>)" : US" (delivery error message)"; | |
1059 | deliver_freeze = TRUE; | |
1060 | deliver_frozen_at = time(NULL); | |
1061 | update_spool = TRUE; | |
1062 | ||
1063 | /* The address is put on the defer rather than the failed queue, because | |
1064 | the message is being retained. */ | |
1065 | ||
1066 | addr->next = addr_defer; | |
1067 | addr_defer = addr; | |
1068 | } | |
1069 | ||
1070 | /* Don't put the address on the nonrecipients tree yet; wait until an | |
1071 | error message has been successfully sent. */ | |
1072 | ||
1073 | else | |
1074 | { | |
1075 | addr->next = addr_failed; | |
1076 | addr_failed = addr; | |
1077 | } | |
1078 | ||
1079 | /* Build up the log line for the message and main logs */ | |
1080 | ||
1081 | s = reset_point = store_get(size); | |
1082 | s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address)); | |
1083 | ||
1084 | if ((log_extra_selector & LX_sender_on_delivery) != 0) | |
1085 | s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">"); | |
1086 | ||
1087 | /* Return path may not be set if no delivery actually happened */ | |
1088 | ||
1089 | if (used_return_path != NULL && | |
1090 | (log_extra_selector & LX_return_path_on_delivery) != 0) | |
1091 | { | |
1092 | s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">"); | |
1093 | } | |
1094 | ||
1095 | if (addr->router != NULL) | |
1096 | s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name); | |
1097 | if (addr->transport != NULL) | |
1098 | s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name); | |
1099 | ||
1100 | if (addr->host_used != NULL) | |
1101 | s = string_append(s, &size, &ptr, 5, US" H=", addr->host_used->name, | |
1102 | US" [", addr->host_used->address, US"]"); | |
1103 | ||
1104 | if (addr->basic_errno > 0) | |
1105 | s = string_append(s, &size, &ptr, 2, US": ", | |
1106 | US strerror(addr->basic_errno)); | |
1107 | ||
1108 | if (addr->message != NULL) | |
1109 | s = string_append(s, &size, &ptr, 2, US": ", addr->message); | |
1110 | ||
1111 | s[ptr] = 0; | |
1112 | ||
1113 | /* Do the logging. For the message log, "routing failed" for those cases, | |
1114 | just to make it clearer. */ | |
1115 | ||
1116 | if (driver_name == NULL) | |
1117 | deliver_msglog("%s %s failed for %s\n", now, driver_kind, s); | |
1118 | else | |
1119 | deliver_msglog("%s %s\n", now, s); | |
1120 | ||
1121 | log_write(0, LOG_MAIN, "** %s", s); | |
1122 | store_reset(reset_point); | |
1123 | } | |
1124 | ||
1125 | /* Ensure logging is turned on again in all cases */ | |
1126 | ||
1127 | disable_logging = FALSE; | |
1128 | } | |
1129 | ||
1130 | ||
1131 | ||
1132 | ||
1133 | /************************************************* | |
1134 | * Address-independent error * | |
1135 | *************************************************/ | |
1136 | ||
1137 | /* This function is called when there's an error that is not dependent on a | |
1138 | particular address, such as an expansion string failure. It puts the error into | |
1139 | all the addresses in a batch, logs the incident on the main and panic logs, and | |
1140 | clears the expansions. It is mostly called from local_deliver(), but can be | |
1141 | called for a remote delivery via findugid(). | |
1142 | ||
1143 | Arguments: | |
1144 | logit TRUE if (MAIN+PANIC) logging required | |
1145 | addr the first of the chain of addresses | |
1146 | code the error code | |
1147 | format format string for error message, or NULL if already set in addr | |
1148 | ... arguments for the format | |
1149 | ||
1150 | Returns: nothing | |
1151 | */ | |
1152 | ||
1153 | static void | |
1154 | common_error(BOOL logit, address_item *addr, int code, uschar *format, ...) | |
1155 | { | |
1156 | address_item *addr2; | |
1157 | addr->basic_errno = code; | |
1158 | ||
1159 | if (format != NULL) | |
1160 | { | |
1161 | va_list ap; | |
1162 | uschar buffer[512]; | |
1163 | va_start(ap, format); | |
1164 | if (!string_vformat(buffer, sizeof(buffer), CS format, ap)) | |
1165 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, | |
1166 | "common_error expansion was longer than %d", sizeof(buffer)); | |
1167 | va_end(ap); | |
1168 | addr->message = string_copy(buffer); | |
1169 | } | |
1170 | ||
1171 | for (addr2 = addr->next; addr2 != NULL; addr2 = addr2->next) | |
1172 | { | |
1173 | addr2->basic_errno = code; | |
1174 | addr2->message = addr->message; | |
1175 | } | |
1176 | ||
1177 | if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message); | |
1178 | deliver_set_expansions(NULL); | |
1179 | } | |
1180 | ||
1181 | ||
1182 | ||
1183 | ||
1184 | /************************************************* | |
1185 | * Check a "never users" list * | |
1186 | *************************************************/ | |
1187 | ||
1188 | /* This function is called to check whether a uid is on one of the two "never | |
1189 | users" lists. | |
1190 | ||
1191 | Arguments: | |
1192 | uid the uid to be checked | |
1193 | nusers the list to be scanned; the first item in the list is the count | |
1194 | ||
1195 | Returns: TRUE if the uid is on the list | |
1196 | */ | |
1197 | ||
1198 | static BOOL | |
1199 | check_never_users(uid_t uid, uid_t *nusers) | |
1200 | { | |
1201 | int i; | |
1202 | if (nusers == NULL) return FALSE; | |
1203 | for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE; | |
1204 | return FALSE; | |
1205 | } | |
1206 | ||
1207 | ||
1208 | ||
1209 | /************************************************* | |
1210 | * Find uid and gid for a transport * | |
1211 | *************************************************/ | |
1212 | ||
1213 | /* This function is called for both local and remote deliveries, to find the | |
1214 | uid/gid under which to run the delivery. The values are taken preferentially | |
1215 | from the transport (either explicit or deliver_as_creator), then from the | |
1216 | address (i.e. the router), and if nothing is set, the exim uid/gid are used. If | |
1217 | the resulting uid is on the "never_users" or the "fixed_never_users" list, a | |
1218 | panic error is logged, and the function fails (which normally leads to delivery | |
1219 | deferral). | |
1220 | ||
1221 | Arguments: | |
1222 | addr the address (possibly a chain) | |
1223 | tp the transport | |
1224 | uidp pointer to uid field | |
1225 | gidp pointer to gid field | |
1226 | igfp pointer to the use_initgroups field | |
1227 | ||
1228 | Returns: FALSE if failed - error has been set in address(es) | |
1229 | */ | |
1230 | ||
1231 | static BOOL | |
1232 | findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp, | |
1233 | BOOL *igfp) | |
1234 | { | |
1235 | uschar *nuname = NULL; | |
1236 | BOOL gid_set = FALSE; | |
1237 | ||
1238 | /* Default initgroups flag comes from the transport */ | |
1239 | ||
1240 | *igfp = tp->initgroups; | |
1241 | ||
1242 | /* First see if there's a gid on the transport, either fixed or expandable. | |
1243 | The expanding function always logs failure itself. */ | |
1244 | ||
1245 | if (tp->gid_set) | |
1246 | { | |
1247 | *gidp = tp->gid; | |
1248 | gid_set = TRUE; | |
1249 | } | |
1250 | else if (tp->expand_gid != NULL) | |
1251 | { | |
1252 | if (route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp, | |
1253 | &(addr->message))) gid_set = TRUE; | |
1254 | else | |
1255 | { | |
1256 | common_error(FALSE, addr, ERRNO_GIDFAIL, NULL); | |
1257 | return FALSE; | |
1258 | } | |
1259 | } | |
1260 | ||
1261 | /* Pick up a uid from the transport if one is set. */ | |
1262 | ||
1263 | if (tp->uid_set) *uidp = tp->uid; | |
1264 | ||
1265 | /* Otherwise, try for an expandable uid field. If it ends up as a numeric id, | |
1266 | it does not provide a passwd value from which a gid can be taken. */ | |
1267 | ||
1268 | else if (tp->expand_uid != NULL) | |
1269 | { | |
1270 | struct passwd *pw; | |
1271 | if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw, | |
1272 | uidp, &(addr->message))) | |
1273 | { | |
1274 | common_error(FALSE, addr, ERRNO_UIDFAIL, NULL); | |
1275 | return FALSE; | |
1276 | } | |
1277 | if (!gid_set && pw != NULL) | |
1278 | { | |
1279 | *gidp = pw->pw_gid; | |
1280 | gid_set = TRUE; | |
1281 | } | |
1282 | } | |
1283 | ||
1284 | /* If the transport doesn't set the uid, test the deliver_as_creator flag. */ | |
1285 | ||
1286 | else if (tp->deliver_as_creator) | |
1287 | { | |
1288 | *uidp = originator_uid; | |
1289 | if (!gid_set) | |
1290 | { | |
1291 | *gidp = originator_gid; | |
1292 | gid_set = TRUE; | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | /* Otherwise see if the address specifies the uid and if so, take its | |
1297 | initgroups flag. The gid from the address is taken only if the transport hasn't | |
1298 | set it. In other words, a gid on the transport overrides the gid on the | |
1299 | address. */ | |
1300 | ||
1301 | else if (testflag(addr, af_uid_set)) | |
1302 | { | |
1303 | *uidp = addr->uid; | |
1304 | *igfp = testflag(addr, af_initgroups); | |
1305 | if (!gid_set) | |
1306 | { | |
1307 | *gidp = addr->gid; | |
1308 | gid_set = TRUE; | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | /* Nothing has specified the uid - default to the Exim user, and group if the | |
1313 | gid is not set. */ | |
1314 | ||
1315 | else | |
1316 | { | |
1317 | *uidp = exim_uid; | |
1318 | if (!gid_set) | |
1319 | { | |
1320 | *gidp = exim_gid; | |
1321 | gid_set = TRUE; | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | /* If no gid is set, it is a disaster. */ | |
1326 | ||
1327 | if (!gid_set) | |
1328 | { | |
1329 | common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for " | |
1330 | "%s transport", tp->name); | |
1331 | return FALSE; | |
1332 | } | |
1333 | ||
1334 | /* Check that the uid is not on the lists of banned uids that may not be used | |
1335 | for delivery processes. */ | |
1336 | ||
1337 | if (check_never_users(*uidp, never_users)) | |
1338 | nuname = US"never_users"; | |
1339 | else if (check_never_users(*uidp, fixed_never_users)) | |
1340 | nuname = US"fixed_never_users"; | |
1341 | ||
1342 | if (nuname != NULL) | |
1343 | { | |
1344 | common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport " | |
1345 | "is on the %s list", (long int)(*uidp), tp->name, nuname); | |
1346 | return FALSE; | |
1347 | } | |
1348 | ||
1349 | /* All is well */ | |
1350 | ||
1351 | return TRUE; | |
1352 | } | |
1353 | ||
1354 | ||
1355 | ||
1356 | ||
1357 | /************************************************* | |
1358 | * Check the size of a message for a transport * | |
1359 | *************************************************/ | |
1360 | ||
1361 | /* Checks that the message isn't too big for the selected transport. | |
1362 | This is called only when it is known that the limit is set. | |
1363 | ||
1364 | Arguments: | |
1365 | tp the transport | |
1366 | addr the (first) address being delivered | |
1367 | ||
1368 | Returns: OK | |
1369 | DEFER expansion failed or did not yield an integer | |
1370 | FAIL message too big | |
1371 | */ | |
1372 | ||
1373 | int | |
1374 | check_message_size(transport_instance *tp, address_item *addr) | |
1375 | { | |
1376 | int rc = OK; | |
1377 | int size_limit; | |
1378 | ||
1379 | deliver_set_expansions(addr); | |
1380 | size_limit = expand_string_integer(tp->message_size_limit); | |
1381 | deliver_set_expansions(NULL); | |
1382 | ||
1383 | if (size_limit < 0) | |
1384 | { | |
1385 | rc = DEFER; | |
1386 | if (size_limit == -1) | |
1387 | addr->message = string_sprintf("failed to expand message_size_limit " | |
1388 | "in %s transport: %s", tp->name, expand_string_message); | |
1389 | else | |
1390 | addr->message = string_sprintf("invalid message_size_limit " | |
1391 | "in %s transport: %s", tp->name, expand_string_message); | |
1392 | } | |
1393 | else if (size_limit > 0 && message_size > size_limit) | |
1394 | { | |
1395 | rc = FAIL; | |
1396 | addr->message = | |
1397 | string_sprintf("message is too big (transport limit = %d)", | |
1398 | size_limit); | |
1399 | } | |
1400 | ||
1401 | return rc; | |
1402 | } | |
1403 | ||
1404 | ||
1405 | ||
1406 | /************************************************* | |
1407 | * Transport-time check for a previous delivery * | |
1408 | *************************************************/ | |
1409 | ||
1410 | /* Check that this base address hasn't previously been delivered to its routed | |
1411 | transport. The check is necessary at delivery time in order to handle homonymic | |
1412 | addresses correctly in cases where the pattern of redirection changes between | |
1413 | delivery attempts (so the unique fields change). Non-homonymic previous | |
1414 | delivery is detected earlier, at routing time (which saves unnecessary | |
1415 | routing). | |
1416 | ||
1417 | Argument: the address item | |
1418 | Returns: TRUE if previously delivered by the transport | |
1419 | */ | |
1420 | ||
1421 | static BOOL | |
1422 | previously_transported(address_item *addr) | |
1423 | { | |
1424 | (void)string_format(big_buffer, big_buffer_size, "%s/%s", | |
1425 | addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name); | |
1426 | ||
1427 | if (tree_search(tree_nonrecipients, big_buffer) != 0) | |
1428 | { | |
1429 | DEBUG(D_deliver|D_route|D_transport) | |
1430 | debug_printf("%s was previously delivered (%s transport): discarded\n", | |
1431 | addr->address, addr->transport->name); | |
1432 | child_done(addr, tod_stamp(tod_log)); | |
1433 | return TRUE; | |
1434 | } | |
1435 | ||
1436 | return FALSE; | |
1437 | } | |
1438 | ||
1439 | ||
1440 | ||
1441 | ||
1442 | /************************************************* | |
1443 | * Perform a local delivery * | |
1444 | *************************************************/ | |
1445 | ||
1446 | /* Each local delivery is performed in a separate process which sets its | |
1447 | uid and gid as specified. This is a safer way than simply changing and | |
1448 | restoring using seteuid(); there is a body of opinion that seteuid() cannot be | |
1449 | used safely. From release 4, Exim no longer makes any use of it. Besides, not | |
1450 | all systems have seteuid(). | |
1451 | ||
1452 | If the uid/gid are specified in the transport_instance, they are used; the | |
1453 | transport initialization must ensure that either both or neither are set. | |
1454 | Otherwise, the values associated with the address are used. If neither are set, | |
1455 | it is a configuration error. | |
1456 | ||
1457 | The transport or the address may specify a home directory (transport over- | |
1458 | rides), and if they do, this is set as $home. If neither have set a working | |
1459 | directory, this value is used for that as well. Otherwise $home is left unset | |
1460 | and the cwd is set to "/" - a directory that should be accessible to all users. | |
1461 | ||
1462 | Using a separate process makes it more complicated to get error information | |
1463 | back. We use a pipe to pass the return code and also an error code and error | |
1464 | text string back to the parent process. | |
1465 | ||
1466 | Arguments: | |
1467 | addr points to an address block for this delivery; for "normal" local | |
1468 | deliveries this is the only address to be delivered, but for | |
1469 | pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe) | |
1470 | a number of addresses can be handled simultaneously, and in this | |
1471 | case addr will point to a chain of addresses with the same | |
1472 | characteristics. | |
1473 | ||
1474 | shadowing TRUE if running a shadow transport; this causes output from pipes | |
1475 | to be ignored. | |
1476 | ||
1477 | Returns: nothing | |
1478 | */ | |
1479 | ||
1480 | static void | |
1481 | deliver_local(address_item *addr, BOOL shadowing) | |
1482 | { | |
1483 | BOOL use_initgroups; | |
1484 | uid_t uid; | |
1485 | gid_t gid; | |
1486 | int status, len, rc; | |
1487 | int pfd[2]; | |
1488 | pid_t pid; | |
1489 | uschar *working_directory; | |
1490 | address_item *addr2; | |
1491 | transport_instance *tp = addr->transport; | |
1492 | ||
1493 | /* Set up the return path from the errors or sender address. If the transport | |
1494 | has its own return path setting, expand it and replace the existing value. */ | |
1495 | ||
1496 | return_path = (addr->p.errors_address != NULL)? | |
1497 | addr->p.errors_address : sender_address; | |
1498 | ||
1499 | if (tp->return_path != NULL) | |
1500 | { | |
1501 | uschar *new_return_path = expand_string(tp->return_path); | |
1502 | if (new_return_path == NULL) | |
1503 | { | |
1504 | if (!expand_string_forcedfail) | |
1505 | { | |
1506 | common_error(TRUE, addr, ERRNO_EXPANDFAIL, | |
1507 | US"Failed to expand return path \"%s\" in %s transport: %s", | |
1508 | tp->return_path, tp->name, expand_string_message); | |
1509 | return; | |
1510 | } | |
1511 | } | |
1512 | else return_path = new_return_path; | |
1513 | } | |
1514 | ||
1515 | /* For local deliveries, one at a time, the value used for logging can just be | |
1516 | set directly, once and for all. */ | |
1517 | ||
1518 | used_return_path = return_path; | |
1519 | ||
1520 | /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message | |
1521 | gets put into the address(es), and the expansions are unset, so we can just | |
1522 | return. */ | |
1523 | ||
1524 | if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return; | |
1525 | ||
1526 | /* See if either the transport or the address specifies a home and/or a current | |
1527 | working directory. Expand it if necessary. If nothing is set, use "/", for the | |
1528 | working directory, which is assumed to be a directory to which all users have | |
1529 | access. It is necessary to be in a visible directory for some operating systems | |
1530 | when running pipes, as some commands (e.g. "rm" under Solaris 2.5) require | |
1531 | this. */ | |
1532 | ||
1533 | deliver_home = (tp->home_dir != NULL)? tp->home_dir : | |
1534 | (addr->home_dir != NULL)? addr->home_dir : NULL; | |
1535 | ||
1536 | if (deliver_home != NULL && !testflag(addr, af_home_expanded)) | |
1537 | { | |
1538 | uschar *rawhome = deliver_home; | |
1539 | deliver_home = NULL; /* in case it contains $home */ | |
1540 | deliver_home = expand_string(rawhome); | |
1541 | if (deliver_home == NULL) | |
1542 | { | |
1543 | common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed " | |
1544 | "to expand for %s transport: %s", rawhome, tp->name, | |
1545 | expand_string_message); | |
1546 | return; | |
1547 | } | |
1548 | if (*deliver_home != '/') | |
1549 | { | |
1550 | common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" " | |
1551 | "is not absolute for %s transport", deliver_home, tp->name); | |
1552 | return; | |
1553 | } | |
1554 | } | |
1555 | ||
1556 | working_directory = (tp->current_dir != NULL)? tp->current_dir : | |
1557 | (addr->current_dir != NULL)? addr->current_dir : NULL; | |
1558 | ||
1559 | if (working_directory != NULL) | |
1560 | { | |
1561 | uschar *raw = working_directory; | |
1562 | working_directory = expand_string(raw); | |
1563 | if (working_directory == NULL) | |
1564 | { | |
1565 | common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" " | |
1566 | "failed to expand for %s transport: %s", raw, tp->name, | |
1567 | expand_string_message); | |
1568 | return; | |
1569 | } | |
1570 | if (*working_directory != '/') | |
1571 | { | |
1572 | common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path " | |
1573 | "\"%s\" is not absolute for %s transport", working_directory, tp->name); | |
1574 | return; | |
1575 | } | |
1576 | } | |
1577 | else working_directory = (deliver_home == NULL)? US"/" : deliver_home; | |
1578 | ||
1579 | /* If one of the return_output flags is set on the transport, create and open a | |
1580 | file in the message log directory for the transport to write its output onto. | |
1581 | This is mainly used by pipe transports. The file needs to be unique to the | |
1582 | address. This feature is not available for shadow transports. */ | |
1583 | ||
1584 | if (!shadowing && (tp->return_output || tp->return_fail_output || | |
1585 | tp->log_output || tp->log_fail_output)) | |
1586 | { | |
1587 | uschar *error; | |
1588 | addr->return_filename = | |
1589 | string_sprintf("%s/msglog/%s/%s-%d-%d", spool_directory, message_subdir, | |
1590 | message_id, getpid(), return_count++); | |
1591 | addr->return_file = open_msglog_file(addr->return_filename, 0400, &error); | |
1592 | if (addr->return_file < 0) | |
1593 | { | |
1594 | common_error(TRUE, addr, errno, US"Unable to %s file for %s transport " | |
1595 | "to return message: %s", error, tp->name, strerror(errno)); | |
1596 | return; | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | /* Create the pipe for inter-process communication. */ | |
1601 | ||
1602 | if (pipe(pfd) != 0) | |
1603 | { | |
1604 | common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s", | |
1605 | strerror(errno)); | |
1606 | return; | |
1607 | } | |
1608 | ||
1609 | /* Now fork the process to do the real work in the subprocess, but first | |
1610 | ensure that all cached resources are freed so that the subprocess starts with | |
1611 | a clean slate and doesn't interfere with the parent process. */ | |
1612 | ||
1613 | search_tidyup(); | |
1614 | ||
1615 | if ((pid = fork()) == 0) | |
1616 | { | |
1617 | BOOL replicate = TRUE; | |
1618 | ||
1619 | /* Prevent core dumps, as we don't want them in users' home directories. | |
1620 | HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that | |
1621 | system. Some experimental/developing systems (e.g. GNU/Hurd) may define | |
1622 | RLIMIT_CORE but not support it in setrlimit(). For such systems, do not | |
1623 | complain if the error is "not supported". */ | |
1624 | ||
1625 | #ifdef RLIMIT_CORE | |
1626 | struct rlimit rl; | |
1627 | rl.rlim_cur = 0; | |
1628 | rl.rlim_max = 0; | |
1629 | if (setrlimit(RLIMIT_CORE, &rl) < 0) | |
1630 | { | |
1631 | #ifdef SETRLIMIT_NOT_SUPPORTED | |
1632 | if (errno != ENOSYS && errno != ENOTSUP) | |
1633 | #endif | |
1634 | log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s", | |
1635 | strerror(errno)); | |
1636 | } | |
1637 | #endif | |
1638 | ||
1639 | /* Reset the random number generator, so different processes don't all | |
1640 | have the same sequence. */ | |
1641 | ||
1642 | random_seed = 0; | |
1643 | ||
1644 | /* If the transport has a setup entry, call this first, while still | |
1645 | privileged. (Appendfile uses this to expand quota, for example, while | |
1646 | able to read private files.) */ | |
1647 | ||
1648 | if (addr->transport->setup != NULL) | |
1649 | { | |
1650 | switch((addr->transport->setup)(addr->transport, addr, NULL, | |
1651 | &(addr->message))) | |
1652 | { | |
1653 | case DEFER: | |
1654 | addr->transport_return = DEFER; | |
1655 | goto PASS_BACK; | |
1656 | ||
1657 | case FAIL: | |
1658 | addr->transport_return = PANIC; | |
1659 | goto PASS_BACK; | |
1660 | } | |
1661 | } | |
1662 | ||
1663 | /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as | |
1664 | when the process becomes unprivileged, it won't be able to write to the | |
1665 | process log. SIGHUP is ignored throughout exim, except when it is being | |
1666 | run as a daemon. */ | |
1667 | ||
1668 | signal(SIGINT, SIG_IGN); | |
1669 | signal(SIGTERM, SIG_IGN); | |
1670 | signal(SIGUSR1, SIG_IGN); | |
1671 | ||
1672 | /* Close the unwanted half of the pipe, and set close-on-exec for the other | |
1673 | half - for transports that exec things (e.g. pipe). Then set the required | |
1674 | gid/uid. */ | |
1675 | ||
1676 | close(pfd[pipe_read]); | |
1677 | fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) | | |
1678 | FD_CLOEXEC); | |
1679 | exim_setugid(uid, gid, use_initgroups, | |
1680 | string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part, | |
1681 | addr->address, addr->transport->name)); | |
1682 | ||
1683 | DEBUG(D_deliver) | |
1684 | { | |
1685 | address_item *batched; | |
1686 | debug_printf(" home=%s current=%s\n", deliver_home, working_directory); | |
1687 | for (batched = addr->next; batched != NULL; batched = batched->next) | |
1688 | debug_printf("additional batched address: %s\n", batched->address); | |
1689 | } | |
1690 | ||
1691 | /* Set an appropriate working directory. */ | |
1692 | ||
1693 | if (Uchdir(working_directory) < 0) | |
1694 | { | |
1695 | addr->transport_return = DEFER; | |
1696 | addr->basic_errno = errno; | |
1697 | addr->message = string_sprintf("failed to chdir to %s", working_directory); | |
1698 | } | |
1699 | ||
1700 | /* If successful, call the transport */ | |
1701 | ||
1702 | else | |
1703 | { | |
1704 | BOOL ok = TRUE; | |
1705 | set_process_info("delivering %s to %s using %s", message_id, | |
1706 | addr->local_part, addr->transport->name); | |
1707 | ||
1708 | /* If a transport filter has been specified, set up its argument list. | |
1709 | Any errors will get put into the address, and FALSE yielded. */ | |
1710 | ||
1711 | if (addr->transport->filter_command != NULL) | |
1712 | { | |
1713 | ok = transport_set_up_command(&transport_filter_argv, | |
1714 | addr->transport->filter_command, | |
1715 | TRUE, PANIC, addr, US"transport filter", NULL); | |
1716 | transport_filter_timeout = addr->transport->filter_timeout; | |
1717 | } | |
1718 | else transport_filter_argv = NULL; | |
1719 | ||
1720 | if (ok) | |
1721 | { | |
1722 | debug_print_string(addr->transport->debug_string); | |
1723 | replicate = !(addr->transport->info->code)(addr->transport, addr); | |
1724 | } | |
1725 | } | |
1726 | ||
1727 | /* Pass the results back down the pipe. If necessary, first replicate the | |
1728 | status in the top address to the others in the batch. The label is the | |
1729 | subject of a goto when a call to the transport's setup function fails. We | |
1730 | pass the pointer to the transport back in case it got changed as a result of | |
1731 | file_format in appendfile. */ | |
1732 | ||
1733 | PASS_BACK: | |
1734 | ||
1735 | if (replicate) replicate_status(addr); | |
1736 | for (addr2 = addr; addr2 != NULL; addr2 = addr2->next) | |
1737 | { | |
1738 | int i; | |
1739 | int local_part_length = Ustrlen(addr2->local_part); | |
1740 | uschar *s; | |
1741 | ||
1742 | write(pfd[pipe_write], (void *)&(addr2->transport_return), sizeof(int)); | |
1743 | write(pfd[pipe_write], (void *)&transport_count, sizeof(transport_count)); | |
1744 | write(pfd[pipe_write], (void *)&(addr2->flags), sizeof(addr2->flags)); | |
1745 | write(pfd[pipe_write], (void *)&(addr2->basic_errno), sizeof(int)); | |
1746 | write(pfd[pipe_write], (void *)&(addr2->more_errno), sizeof(int)); | |
1747 | write(pfd[pipe_write], (void *)&(addr2->special_action), sizeof(int)); | |
1748 | write(pfd[pipe_write], (void *)&(addr2->transport), | |
1749 | sizeof(transport_instance *)); | |
1750 | ||
1751 | /* For a file delivery, pass back the local part, in case the original | |
1752 | was only part of the final delivery path. This gives more complete | |
1753 | logging. */ | |
1754 | ||
1755 | if (testflag(addr2, af_file)) | |
1756 | { | |
1757 | write(pfd[pipe_write], (void *)&local_part_length, sizeof(int)); | |
1758 | write(pfd[pipe_write], addr2->local_part, local_part_length); | |
1759 | } | |
1760 | ||
1761 | /* Now any messages */ | |
1762 | ||
1763 | for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message) | |
1764 | { | |
1765 | int message_length = (s == NULL)? 0 : Ustrlen(s) + 1; | |
1766 | write(pfd[pipe_write], (void *)&message_length, sizeof(int)); | |
1767 | if (message_length > 0) write(pfd[pipe_write], s, message_length); | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | /* OK, this process is now done. Free any cached resources that it opened, | |
1772 | and close the pipe we were writing down before exiting. */ | |
1773 | ||
1774 | close(pfd[pipe_write]); | |
1775 | search_tidyup(); | |
1776 | exit(EXIT_SUCCESS); | |
1777 | } | |
1778 | ||
1779 | /* Back in the main process: panic if the fork did not succeed. This seems | |
1780 | better than returning an error - if forking is failing it is probably best | |
1781 | not to try other deliveries for this message. */ | |
1782 | ||
1783 | if (pid < 0) | |
1784 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s", | |
1785 | addr->address); | |
1786 | ||
1787 | /* Read the pipe to get the delivery status codes and error messages. Our copy | |
1788 | of the writing end must be closed first, as otherwise read() won't return zero | |
1789 | on an empty pipe. We check that a status exists for each address before | |
1790 | overwriting the address structure. If data is missing, the default DEFER status | |
1791 | will remain. Afterwards, close the reading end. */ | |
1792 | ||
1793 | close(pfd[pipe_write]); | |
1794 | ||
1795 | for (addr2 = addr; addr2 != NULL; addr2 = addr2->next) | |
1796 | { | |
1797 | len = read(pfd[pipe_read], (void *)&status, sizeof(int)); | |
1798 | if (len > 0) | |
1799 | { | |
1800 | int i; | |
1801 | uschar **sptr; | |
1802 | ||
1803 | addr2->transport_return = status; | |
1804 | len = read(pfd[pipe_read], (void *)&transport_count, | |
1805 | sizeof(transport_count)); | |
1806 | len = read(pfd[pipe_read], (void *)&(addr2->flags), sizeof(addr2->flags)); | |
1807 | len = read(pfd[pipe_read], (void *)&(addr2->basic_errno), sizeof(int)); | |
1808 | len = read(pfd[pipe_read], (void *)&(addr2->more_errno), sizeof(int)); | |
1809 | len = read(pfd[pipe_read], (void *)&(addr2->special_action), sizeof(int)); | |
1810 | len = read(pfd[pipe_read], (void *)&(addr2->transport), | |
1811 | sizeof(transport_instance *)); | |
1812 | ||
1813 | if (testflag(addr2, af_file)) | |
1814 | { | |
1815 | int local_part_length; | |
1816 | len = read(pfd[pipe_read], (void *)&local_part_length, sizeof(int)); | |
1817 | len = read(pfd[pipe_read], (void *)big_buffer, local_part_length); | |
1818 | big_buffer[local_part_length] = 0; | |
1819 | addr2->local_part = string_copy(big_buffer); | |
1820 | } | |
1821 | ||
1822 | for (i = 0, sptr = &(addr2->message); i < 2; | |
1823 | i++, sptr = &(addr2->user_message)) | |
1824 | { | |
1825 | int message_length; | |
1826 | len = read(pfd[pipe_read], (void *)&message_length, sizeof(int)); | |
1827 | if (message_length > 0) | |
1828 | { | |
1829 | len = read(pfd[pipe_read], (void *)big_buffer, message_length); | |
1830 | if (len > 0) *sptr = string_copy(big_buffer); | |
1831 | } | |
1832 | } | |
1833 | } | |
1834 | ||
1835 | else | |
1836 | { | |
1837 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s " | |
1838 | "from delivery subprocess", addr2->unique); | |
1839 | break; | |
1840 | } | |
1841 | } | |
1842 | ||
1843 | close(pfd[pipe_read]); | |
1844 | ||
1845 | /* Unless shadowing, write all successful addresses immediately to the journal | |
1846 | file, to ensure they are recorded asap. For homonymic addresses, use the base | |
1847 | address plus the transport name. Failure to write the journal is panic-worthy, | |
1848 | but don't stop, as it may prove possible subsequently to update the spool file | |
1849 | in order to record the delivery. */ | |
1850 | ||
1851 | if (!shadowing) | |
1852 | { | |
1853 | for (addr2 = addr; addr2 != NULL; addr2 = addr2->next) | |
1854 | { | |
1855 | if (addr2->transport_return != OK) continue; | |
1856 | ||
1857 | if (testflag(addr2, af_homonym)) | |
1858 | sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name); | |
1859 | else | |
1860 | sprintf(CS big_buffer, "%.500s\n", addr2->unique); | |
1861 | ||
1862 | /* In the test harness, wait just a bit to let the subprocess finish off | |
1863 | any debug output etc first. */ | |
1864 | ||
1865 | if (running_in_test_harness) millisleep(300); | |
1866 | ||
1867 | DEBUG(D_deliver) debug_printf("journalling %s", big_buffer); | |
1868 | len = Ustrlen(big_buffer); | |
1869 | if (write(journal_fd, big_buffer, len) != len) | |
1870 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s", | |
1871 | big_buffer, strerror(errno)); | |
1872 | } | |
1873 | ||
1874 | /* Ensure the journal file is pushed out to disk. */ | |
1875 | ||
1876 | if (fsync(journal_fd) < 0) | |
1877 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s", | |
1878 | strerror(errno)); | |
1879 | } | |
1880 | ||
1881 | /* Wait for the process to finish. If it terminates with a non-zero code, | |
1882 | freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the | |
1883 | status values of all the addresses as they are. Take care to handle the case | |
1884 | when the subprocess doesn't seem to exist. This has been seen on one system | |
1885 | when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that | |
1886 | happens, wait() doesn't recognize the termination of child processes. Exim now | |
1887 | resets SIGCHLD to SIG_DFL, but this code should still be robust. */ | |
1888 | ||
1889 | while ((rc = wait(&status)) != pid) | |
1890 | { | |
1891 | if (rc < 0 && errno == ECHILD) /* Process has vanished */ | |
1892 | { | |
1893 | log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly", | |
1894 | addr->transport->driver_name); | |
1895 | status = 0; | |
1896 | break; | |
1897 | } | |
1898 | } | |
1899 | ||
1900 | if ((status & 0xffff) != 0) | |
1901 | { | |
1902 | int msb = (status >> 8) & 255; | |
1903 | int lsb = status & 255; | |
1904 | int code = (msb == 0)? (lsb & 0x7f) : msb; | |
1905 | if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT)) | |
1906 | addr->special_action = SPECIAL_FREEZE; | |
1907 | log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero " | |
1908 | "status 0x%04x: %s %d", | |
1909 | addr->transport->driver_name, | |
1910 | status, | |
1911 | (msb == 0)? "terminated by signal" : "exit code", | |
1912 | code); | |
1913 | } | |
1914 | ||
1915 | /* If SPECIAL_WARN is set in the top address, send a warning message. */ | |
1916 | ||
1917 | if (addr->special_action == SPECIAL_WARN && | |
1918 | addr->transport->warn_message != NULL) | |
1919 | { | |
1920 | int fd; | |
1921 | uschar *warn_message; | |
1922 | ||
1923 | DEBUG(D_deliver) debug_printf("Warning message requested by transport\n"); | |
1924 | ||
1925 | warn_message = expand_string(addr->transport->warn_message); | |
1926 | if (warn_message == NULL) | |
1927 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning " | |
1928 | "message for %s transport): %s", addr->transport->warn_message, | |
1929 | addr->transport->name, expand_string_message); | |
1930 | else | |
1931 | { | |
1932 | pid_t pid = child_open_exim(&fd); | |
1933 | if (pid > 0) | |
1934 | { | |
1935 | FILE *f = fdopen(fd, "wb"); | |
1936 | ||
1937 | if (errors_reply_to != NULL) | |
1938 | fprintf(f, "Reply-To: %s\n", errors_reply_to); | |
1939 | fprintf(f, "Auto-Submitted: auto-generated\n"); | |
1940 | fprintf(f, "From: Mail Delivery System <Mailer-Daemon@%s>\n", | |
1941 | qualify_domain_sender); | |
1942 | fprintf(f, "%s", CS warn_message); | |
1943 | ||
1944 | /* Close and wait for child process to complete, without a timeout. */ | |
1945 | ||
1946 | fclose(f); | |
1947 | (void)child_close(pid, 0); | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | addr->special_action = SPECIAL_NONE; | |
1952 | } | |
1953 | } | |
1954 | ||
1955 | ||
1956 | ||
1957 | /************************************************* | |
1958 | * Do local deliveries * | |
1959 | *************************************************/ | |
1960 | ||
1961 | /* This function processes the list of addresses in addr_local. True local | |
1962 | deliveries are always done one address at a time. However, local deliveries can | |
1963 | be batched up in some cases. Typically this is when writing batched SMTP output | |
1964 | files for use by some external transport mechanism, or when running local | |
1965 | deliveries over LMTP. | |
1966 | ||
1967 | Arguments: None | |
1968 | Returns: Nothing | |
1969 | */ | |
1970 | ||
1971 | static void | |
1972 | do_local_deliveries(void) | |
1973 | { | |
1974 | open_db dbblock; | |
1975 | open_db *dbm_file = NULL; | |
1976 | time_t now = time(NULL); | |
1977 | ||
1978 | /* Loop until we have exhausted the supply of local deliveries */ | |
1979 | ||
1980 | while (addr_local != NULL) | |
1981 | { | |
1982 | time_t delivery_start; | |
1983 | int deliver_time; | |
1984 | address_item *addr2, *addr3, *nextaddr; | |
1985 | int logflags = LOG_MAIN; | |
1986 | int logchar = dont_deliver? '*' : '='; | |
1987 | transport_instance *tp; | |
1988 | ||
1989 | /* Pick the first undelivered address off the chain */ | |
1990 | ||
1991 | address_item *addr = addr_local; | |
1992 | addr_local = addr->next; | |
1993 | addr->next = NULL; | |
1994 | ||
1995 | DEBUG(D_deliver|D_transport) | |
1996 | debug_printf("--------> %s <--------\n", addr->address); | |
1997 | ||
1998 | /* An internal disaster if there is no transport. Should not occur! */ | |
1999 | ||
2000 | if ((tp = addr->transport) == NULL) | |
2001 | { | |
2002 | logflags |= LOG_PANIC; | |
2003 | disable_logging = FALSE; /* Jic */ | |
2004 | addr->message = | |
2005 | (addr->router != NULL)? | |
2006 | string_sprintf("No transport set by %s router", addr->router->name) | |
2007 | : | |
2008 | string_sprintf("No transport set by system filter"); | |
2009 | post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0); | |
2010 | continue; | |
2011 | } | |
2012 | ||
2013 | /* Check that this base address hasn't previously been delivered to this | |
2014 | transport. The check is necessary at this point to handle homonymic addresses | |
2015 | correctly in cases where the pattern of redirection changes between delivery | |
2016 | attempts. Non-homonymic previous delivery is detected earlier, at routing | |
2017 | time. */ | |
2018 | ||
2019 | if (previously_transported(addr)) continue; | |
2020 | ||
2021 | /* There are weird cases where logging is disabled */ | |
2022 | ||
2023 | disable_logging = tp->disable_logging; | |
2024 | ||
2025 | /* Check for batched addresses and possible amalgamation. File deliveries can | |
2026 | never be batched. Skip all the work if either batch_max <= 1 or there aren't | |
2027 | any other addresses for local delivery. */ | |
2028 | ||
2029 | if (!testflag(addr, af_file) && tp->batch_max > 1 && addr_local != NULL) | |
2030 | { | |
2031 | int batch_count = 1; | |
2032 | BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain"); | |
2033 | BOOL uses_lp = readconf_depends((driver_instance *)tp, US"local_part"); | |
2034 | uschar *batch_id = NULL; | |
2035 | address_item **anchor = &addr_local; | |
2036 | address_item *last = addr; | |
2037 | address_item *next; | |
2038 | ||
2039 | /* Expand the batch_id string for comparison with other addresses. | |
2040 | Expansion failure suppresses batching. */ | |
2041 | ||
2042 | if (tp->batch_id != NULL) | |
2043 | { | |
2044 | deliver_set_expansions(addr); | |
2045 | batch_id = expand_string(tp->batch_id); | |
2046 | deliver_set_expansions(NULL); | |
2047 | if (batch_id == NULL) | |
2048 | { | |
2049 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option " | |
2050 | "in %s transport (%s): %s", tp->name, addr->address, | |
2051 | expand_string_message); | |
2052 | batch_count = tp->batch_max; | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | /* Until we reach the batch_max limit, pick off addresses which have the | |
2057 | same characteristics. These are: | |
2058 | ||
2059 | same transport | |
2060 | same local part if the transport's configuration contains $local_part | |
2061 | same domain if the transport's configuration contains $domain | |
2062 | same errors address | |
2063 | same additional headers | |
2064 | same headers to be removed | |
2065 | same uid/gid for running the transport | |
2066 | same first host if a host list is set | |
2067 | */ | |
2068 | ||
2069 | while ((next = *anchor) != NULL && batch_count < tp->batch_max) | |
2070 | { | |
2071 | BOOL ok = | |
2072 | tp == next->transport && | |
2073 | (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0) && | |
2074 | (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0) && | |
2075 | same_strings(next->p.errors_address, addr->p.errors_address) && | |
2076 | same_headers(next->p.extra_headers, addr->p.extra_headers) && | |
2077 | same_strings(next->p.remove_headers, addr->p.remove_headers) && | |
2078 | same_ugid(tp, addr, next) && | |
2079 | ((addr->host_list == NULL && next->host_list == NULL) || | |
2080 | (addr->host_list != NULL && next->host_list != NULL && | |
2081 | Ustrcmp(addr->host_list->name, next->host_list->name) == 0)); | |
2082 | ||
2083 | /* If the transport has a batch_id setting, batch_id will be non-NULL | |
2084 | from the expansion outside the loop. Expand for this address and compare. | |
2085 | Expansion failure makes this address ineligible for batching. */ | |
2086 | ||
2087 | if (ok && batch_id != NULL) | |
2088 | { | |
2089 | uschar *bid; | |
2090 | address_item *save_nextnext = next->next; | |
2091 | next->next = NULL; /* Expansion for a single address */ | |
2092 | deliver_set_expansions(next); | |
2093 | next->next = save_nextnext; | |
2094 | bid = expand_string(tp->batch_id); | |
2095 | deliver_set_expansions(NULL); | |
2096 | if (bid == NULL) | |
2097 | { | |
2098 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option " | |
2099 | "in %s transport (%s): %s", tp->name, next->address, | |
2100 | expand_string_message); | |
2101 | ok = FALSE; | |
2102 | } | |
2103 | else ok = (Ustrcmp(batch_id, bid) == 0); | |
2104 | } | |
2105 | ||
2106 | /* Take address into batch if OK. */ | |
2107 | ||
2108 | if (ok) | |
2109 | { | |
2110 | *anchor = next->next; /* Include the address */ | |
2111 | next->next = NULL; | |
2112 | last->next = next; | |
2113 | last = next; | |
2114 | batch_count++; | |
2115 | } | |
2116 | else anchor = &(next->next); /* Skip the address */ | |
2117 | } | |
2118 | } | |
2119 | ||
2120 | /* We now have one or more addresses that can be delivered in a batch. Check | |
2121 | whether the transport is prepared to accept a message of this size. If not, | |
2122 | fail them all forthwith. If the expansion fails, or does not yield an | |
2123 | integer, defer delivery. */ | |
2124 | ||
2125 | if (tp->message_size_limit != NULL) | |
2126 | { | |
2127 | int rc = check_message_size(tp, addr); | |
2128 | if (rc != OK) | |
2129 | { | |
2130 | replicate_status(addr); | |
2131 | while (addr != NULL) | |
2132 | { | |
2133 | addr2 = addr->next; | |
2134 | post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0); | |
2135 | addr = addr2; | |
2136 | } | |
2137 | continue; /* With next batch of addresses */ | |
2138 | } | |
2139 | } | |
2140 | ||
2141 | /* If we are not running the queue, or if forcing, all deliveries will be | |
2142 | attempted. Otherwise, we must respect the retry times for each address. Even | |
2143 | when not doing this, we need to set up the retry key string, and determine | |
2144 | whether a retry record exists, because after a successful delivery, a delete | |
2145 | retry item must be set up. Keep the retry database open only for the duration | |
2146 | of these checks, rather than for all local deliveries, because some local | |
2147 | deliveries (e.g. to pipes) can take a substantial time. */ | |
2148 | ||
2149 | dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE); | |
2150 | if (dbm_file == NULL) | |
2151 | { | |
2152 | DEBUG(D_deliver|D_retry|D_hints_lookup) | |
2153 | debug_printf("no retry data available\n"); | |
2154 | } | |
2155 | ||
2156 | addr2 = addr; | |
2157 | addr3 = NULL; | |
2158 | while (addr2 != NULL) | |
2159 | { | |
2160 | BOOL ok = TRUE; /* to deliver this address */ | |
2161 | uschar *retry_key; | |
2162 | ||
2163 | /* Set up the retry key to include the domain or not, and change its | |
2164 | leading character from "R" to "T". Must make a copy before doing this, | |
2165 | because the old key may be pointed to from a "delete" retry item after | |
2166 | a routing delay. */ | |
2167 | ||
2168 | retry_key = string_copy( | |
2169 | (tp->retry_use_local_part)? addr2->address_retry_key : | |
2170 | addr2->domain_retry_key); | |
2171 | *retry_key = 'T'; | |
2172 | ||
2173 | /* Inspect the retry data. If there is no hints file, delivery happens. */ | |
2174 | ||
2175 | if (dbm_file != NULL) | |
2176 | { | |
2177 | dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key); | |
2178 | ||
2179 | /* If there is no retry record, delivery happens. If there is, | |
2180 | remember it exists so it can be deleted after a successful delivery. */ | |
2181 | ||
2182 | if (retry_record != NULL) | |
2183 | { | |
2184 | setflag(addr2, af_lt_retry_exists); | |
2185 | ||
2186 | /* A retry record exists for this address. If queue running and not | |
2187 | forcing, inspect its contents. If the record is too old, or if its | |
2188 | retry time has come, or if it has passed its cutoff time, delivery | |
2189 | will go ahead. */ | |
2190 | ||
2191 | DEBUG(D_retry) | |
2192 | { | |
2193 | debug_printf("retry record exists: age=%d (max=%d)\n", | |
2194 | (int)(now - retry_record->time_stamp), retry_data_expire); | |
2195 | debug_printf(" time to retry = %d expired = %d\n", | |
2196 | (int)(now - retry_record->next_try), retry_record->expired); | |
2197 | } | |
2198 | ||
2199 | if (queue_running && !deliver_force) | |
2200 | { | |
2201 | ok = (now - retry_record->time_stamp > retry_data_expire) || | |
2202 | (now >= retry_record->next_try) || | |
2203 | retry_record->expired; | |
2204 | ||
2205 | /* If we haven't reached the retry time, there is one more check | |
2206 | to do, which is for the ultimate address timeout. */ | |
2207 | ||
2208 | if (!ok) | |
2209 | { | |
2210 | retry_config *retry = | |
2211 | retry_find_config(retry_key+2, addr2->domain, | |
2212 | retry_record->basic_errno, | |
2213 | retry_record->more_errno); | |
2214 | ||
2215 | DEBUG(D_deliver|D_retry) | |
2216 | debug_printf("retry time not reached for %s: " | |
2217 | "checking ultimate address timeout\n", addr2->address); | |
2218 | ||
2219 | if (retry != NULL && retry->rules != NULL) | |
2220 | { | |
2221 | retry_rule *last_rule; | |
2222 | for (last_rule = retry->rules; | |
2223 | last_rule->next != NULL; | |
2224 | last_rule = last_rule->next); | |
2225 | if (now - received_time > last_rule->timeout) ok = TRUE; | |
2226 | } | |
2227 | else ok = TRUE; /* No rule => timed out */ | |
2228 | ||
2229 | DEBUG(D_deliver|D_retry) | |
2230 | { | |
2231 | if (ok) debug_printf("on queue longer than maximum retry for " | |
2232 | "address - allowing delivery\n"); | |
2233 | } | |
2234 | } | |
2235 | } | |
2236 | } | |
2237 | else DEBUG(D_retry) debug_printf("no retry record exists\n"); | |
2238 | } | |
2239 | ||
2240 | /* This address is to be delivered. Leave it on the chain. */ | |
2241 | ||
2242 | if (ok) | |
2243 | { | |
2244 | addr3 = addr2; | |
2245 | addr2 = addr2->next; | |
2246 | } | |
2247 | ||
2248 | /* This address is to be deferred. Take it out of the chain, and | |
2249 | post-process it as complete. Must take it out of the chain first, | |
2250 | because post processing puts it on another chain. */ | |
2251 | ||
2252 | else | |
2253 | { | |
2254 | address_item *this = addr2; | |
2255 | this->message = US"Retry time not yet reached"; | |
2256 | this->basic_errno = ERRNO_LRETRY; | |
2257 | if (addr3 == NULL) addr2 = addr = addr2->next; | |
2258 | else addr2 = addr3->next = addr2->next; | |
2259 | post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0); | |
2260 | } | |
2261 | } | |
2262 | ||
2263 | if (dbm_file != NULL) dbfn_close(dbm_file); | |
2264 | ||
2265 | /* If there are no addresses left on the chain, they all deferred. Loop | |
2266 | for the next set of addresses. */ | |
2267 | ||
2268 | if (addr == NULL) continue; | |
2269 | ||
2270 | /* So, finally, we do have some addresses that can be passed to the | |
2271 | transport. Before doing so, set up variables that are relevant to a | |
2272 | single delivery. */ | |
2273 | ||
2274 | deliver_set_expansions(addr); | |
2275 | delivery_start = time(NULL); | |
2276 | deliver_local(addr, FALSE); | |
2277 | deliver_time = (int)(time(NULL) - delivery_start); | |
2278 | ||
2279 | /* If a shadow transport (which must perforce be another local transport), is | |
2280 | defined, and its condition is met, we must pass the message to the shadow | |
2281 | too, but only those addresses that succeeded. We do this by making a new | |
2282 | chain of addresses - also to keep the original chain uncontaminated. We must | |
2283 | use a chain rather than doing it one by one, because the shadow transport may | |
2284 | batch. | |
2285 | ||
2286 | NOTE: if the condition fails because of a lookup defer, there is nothing we | |
2287 | can do! */ | |
2288 | ||
2289 | if (tp->shadow != NULL && | |
2290 | (tp->shadow_condition == NULL || | |
2291 | expand_check_condition(tp->shadow_condition, tp->name, US"transport"))) | |
2292 | { | |
2293 | transport_instance *stp; | |
2294 | address_item *shadow_addr = NULL; | |
2295 | address_item **last = &shadow_addr; | |
2296 | ||
2297 | for (stp = transports; stp != NULL; stp = stp->next) | |
2298 | if (Ustrcmp(stp->name, tp->shadow) == 0) break; | |
2299 | ||
2300 | if (stp == NULL) | |
2301 | log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ", | |
2302 | tp->shadow); | |
2303 | ||
2304 | /* Pick off the addresses that have succeeded, and make clones. Put into | |
2305 | the shadow_message field a pointer to the shadow_message field of the real | |
2306 | address. */ | |
2307 | ||
2308 | else for (addr2 = addr; addr2 != NULL; addr2 = addr2->next) | |
2309 | { | |
2310 | if (addr2->transport_return != OK) continue; | |
2311 | addr3 = store_get(sizeof(address_item)); | |
2312 | *addr3 = *addr2; | |
2313 | addr3->next = NULL; | |
2314 | addr3->shadow_message = (uschar *)(&(addr2->shadow_message)); | |
2315 | addr3->transport = stp; | |
2316 | addr3->transport_return = DEFER; | |
2317 | addr3->return_filename = NULL; | |
2318 | addr3->return_file = -1; | |
2319 | *last = addr3; | |
2320 | last = &(addr3->next); | |
2321 | } | |
2322 | ||
2323 | /* If we found any addresses to shadow, run the delivery, and stick any | |
2324 | message back into the shadow_message field in the original. */ | |
2325 | ||
2326 | if (shadow_addr != NULL) | |
2327 | { | |
2328 | int save_count = transport_count; | |
2329 | ||
2330 | DEBUG(D_deliver|D_transport) | |
2331 | debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n"); | |
2332 | deliver_local(shadow_addr, TRUE); | |
2333 | ||
2334 | for(; shadow_addr != NULL; shadow_addr = shadow_addr->next) | |
2335 | { | |
2336 | int sresult = shadow_addr->transport_return; | |
2337 | *((uschar **)(shadow_addr->shadow_message)) = (sresult == OK)? | |
2338 | string_sprintf(" ST=%s", stp->name) : | |
2339 | string_sprintf(" ST=%s (%s%s%s)", stp->name, | |
2340 | (shadow_addr->basic_errno <= 0)? | |
2341 | US"" : US strerror(shadow_addr->basic_errno), | |
2342 | (shadow_addr->basic_errno <= 0 || shadow_addr->message == NULL)? | |
2343 | US"" : US": ", | |
2344 | (shadow_addr->message != NULL)? shadow_addr->message : | |
2345 | (shadow_addr->basic_errno <= 0)? US"unknown error" : US""); | |
2346 | ||
2347 | DEBUG(D_deliver|D_transport) | |
2348 | debug_printf("%s shadow transport returned %s for %s\n", | |
2349 | stp->name, | |
2350 | (sresult == OK)? "OK" : | |
2351 | (sresult == DEFER)? "DEFER" : | |
2352 | (sresult == FAIL)? "FAIL" : | |
2353 | (sresult == PANIC)? "PANIC" : "?", | |
2354 | shadow_addr->address); | |
2355 | } | |
2356 | ||
2357 | DEBUG(D_deliver|D_transport) | |
2358 | debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n"); | |
2359 | ||
2360 | transport_count = save_count; /* Restore original transport count */ | |
2361 | } | |
2362 | } | |
2363 | ||
2364 | /* Cancel the expansions that were set up for the delivery. */ | |
2365 | ||
2366 | deliver_set_expansions(NULL); | |
2367 | ||
2368 | /* Now we can process the results of the real transport. We must take each | |
2369 | address off the chain first, because post_process_one() puts it on another | |
2370 | chain. */ | |
2371 | ||
2372 | for (addr2 = addr; addr2 != NULL; addr2 = nextaddr) | |
2373 | { | |
2374 | int result = addr2->transport_return; | |
2375 | nextaddr = addr2->next; | |
2376 | ||
2377 | DEBUG(D_deliver|D_transport) | |
2378 | debug_printf("%s transport returned %s for %s\n", | |
2379 | tp->name, | |
2380 | (result == OK)? "OK" : | |
2381 | (result == DEFER)? "DEFER" : | |
2382 | (result == FAIL)? "FAIL" : | |
2383 | (result == PANIC)? "PANIC" : "?", | |
2384 | addr2->address); | |
2385 | ||
2386 | /* If there is a retry_record, or if delivery is deferred, build a retry | |
2387 | item for setting a new retry time or deleting the old retry record from | |
2388 | the database. These items are handled all together after all addresses | |
2389 | have been handled (so the database is open just for a short time for | |
2390 | updating). */ | |
2391 | ||
2392 | if (result == DEFER || testflag(addr2, af_lt_retry_exists)) | |
2393 | { | |
2394 | int flags = (result == DEFER)? 0 : rf_delete; | |
2395 | uschar *retry_key = string_copy((tp->retry_use_local_part)? | |
2396 | addr2->address_retry_key : addr2->domain_retry_key); | |
2397 | *retry_key = 'T'; | |
2398 | retry_add_item(addr2, retry_key, flags); | |
2399 | } | |
2400 | ||
2401 | /* Done with this address */ | |
2402 | ||
2403 | if (result == OK) addr2->more_errno = deliver_time; | |
2404 | post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar); | |
2405 | ||
2406 | /* If a pipe delivery generated text to be sent back, the result may be | |
2407 | changed to FAIL, and we must copy this for subsequent addresses in the | |
2408 | batch. */ | |
2409 | ||
2410 | if (addr2->transport_return != result) | |
2411 | { | |
2412 | for (addr3 = nextaddr; addr3 != NULL; addr3 = addr3->next) | |
2413 | { | |
2414 | addr3->transport_return = addr2->transport_return; | |
2415 | addr3->basic_errno = addr2->basic_errno; | |
2416 | addr3->message = addr2->message; | |
2417 | } | |
2418 | result = addr2->transport_return; | |
2419 | } | |
2420 | ||
2421 | /* Whether or not the result was changed to FAIL, we need to copy the | |
2422 | return_file value from the first address into all the addresses of the | |
2423 | batch, so they are all listed in the error message. */ | |
2424 | ||
2425 | addr2->return_file = addr->return_file; | |
2426 | ||
2427 | /* Change log character for recording successful deliveries. */ | |
2428 | ||
2429 | if (result == OK) logchar = '-'; | |
2430 | } | |
2431 | } /* Loop back for next batch of addresses */ | |
2432 | } | |
2433 | ||
2434 | ||
2435 | ||
2436 | ||
2437 | /************************************************* | |
2438 | * Sort remote deliveries * | |
2439 | *************************************************/ | |
2440 | ||
2441 | /* This function is called if remote_sort_domains is set. It arranges that the | |
2442 | chain of addresses for remote deliveries is ordered according to the strings | |
2443 | specified. Try to make this shuffling reasonably efficient by handling | |
2444 | sequences of addresses rather than just single ones. | |
2445 | ||
2446 | Arguments: None | |
2447 | Returns: Nothing | |
2448 | */ | |
2449 | ||
2450 | static void | |
2451 | sort_remote_deliveries(void) | |
2452 | { | |
2453 | int sep = 0; | |
2454 | address_item **aptr = &addr_remote; | |
2455 | uschar *listptr = remote_sort_domains; | |
2456 | uschar *pattern; | |
2457 | uschar patbuf[256]; | |
2458 | ||
2459 | while (*aptr != NULL && | |
2460 | (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf))) | |
2461 | != NULL) | |
2462 | { | |
2463 | address_item *moved = NULL; | |
2464 | address_item **bptr = &moved; | |
2465 | ||
2466 | while (*aptr != NULL) | |
2467 | { | |
2468 | address_item **next; | |
2469 | deliver_domain = (*aptr)->domain; /* set $domain */ | |
2470 | if (match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1, | |
2471 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK) | |
2472 | { | |
2473 | aptr = &((*aptr)->next); | |
2474 | continue; | |
2475 | } | |
2476 | ||
2477 | next = &((*aptr)->next); | |
2478 | while (*next != NULL && | |
2479 | (deliver_domain = (*next)->domain, /* Set $domain */ | |
2480 | match_isinlist(deliver_domain, &pattern, UCHAR_MAX+1, | |
2481 | &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK) | |
2482 | next = &((*next)->next); | |
2483 | ||
2484 | /* If the batch of non-matchers is at the end, add on any that were | |
2485 | extracted further up the chain, and end this iteration. Otherwise, | |
2486 | extract them from the chain and hang on the moved chain. */ | |
2487 | ||
2488 | if (*next == NULL) | |
2489 | { | |
2490 | *next = moved; | |
2491 | break; | |
2492 | } | |
2493 | ||
2494 | *bptr = *aptr; | |
2495 | *aptr = *next; | |
2496 | *next = NULL; | |
2497 | bptr = next; | |
2498 | aptr = &((*aptr)->next); | |
2499 | } | |
2500 | ||
2501 | /* If the loop ended because the final address matched, *aptr will | |
2502 | be NULL. Add on to the end any extracted non-matching addresses. If | |
2503 | *aptr is not NULL, the loop ended via "break" when *next is null, that | |
2504 | is, there was a string of non-matching addresses at the end. In this | |
2505 | case the extracted addresses have already been added on the end. */ | |
2506 | ||
2507 | if (*aptr == NULL) *aptr = moved; | |
2508 | } | |
2509 | ||
2510 | DEBUG(D_deliver) | |
2511 | { | |
2512 | address_item *addr; | |
2513 | debug_printf("remote addresses after sorting:\n"); | |
2514 | for (addr = addr_remote; addr != NULL; addr = addr->next) | |
2515 | debug_printf(" %s\n", addr->address); | |
2516 | } | |
2517 | } | |
2518 | ||
2519 | ||
2520 | ||
2521 | /************************************************* | |
2522 | * Read from pipe for remote delivery subprocess * | |
2523 | *************************************************/ | |
2524 | ||
2525 | /* This function is called when the subprocess is complete, but can also be | |
2526 | called before it is complete, in order to empty a pipe that is full (to prevent | |
2527 | deadlock). It must therefore keep track of its progress in the parlist data | |
2528 | block. | |
2529 | ||
2530 | We read the pipe to get the delivery status codes and a possible error message | |
2531 | for each address, optionally preceded by unusability data for the hosts and | |
2532 | also by optional retry data. | |
2533 | ||
2534 | Read in large chunks into the big buffer and then scan through, interpreting | |
2535 | the data therein. In most cases, only a single read will be necessary. No | |
2536 | individual item will ever be anywhere near 500 bytes in length, so by ensuring | |
2537 | that we read the next chunk when there is less than 500 bytes left in the | |
2538 | non-final chunk, we can assume each item is complete in store before handling | |
2539 | it. Actually, each item is written using a single write(), which is atomic for | |
2540 | small items (less than PIPE_BUF, which seems to be at least 512 in any Unix) so | |
2541 | even if we are reading while the subprocess is still going, we should never | |
2542 | have only a partial item in the buffer. | |
2543 | ||
2544 | Argument: | |
2545 | poffset the offset of the parlist item | |
2546 | eop TRUE if the process has completed | |
2547 | ||
2548 | Returns: TRUE if the terminating 'Z' item has been read, | |
2549 | or there has been a disaster (i.e. no more data needed); | |
2550 | FALSE otherwise | |
2551 | */ | |
2552 | ||
2553 | static BOOL | |
2554 | par_read_pipe(int poffset, BOOL eop) | |
2555 | { | |
2556 | host_item *h; | |
2557 | pardata *p = parlist + poffset; | |
2558 | address_item *addrlist = p->addrlist; | |
2559 | address_item *addr = p->addr; | |
2560 | pid_t pid = p->pid; | |
2561 | int fd = p->fd; | |
2562 | uschar *endptr = big_buffer; | |
2563 | uschar *ptr = endptr; | |
2564 | uschar *msg = p->msg; | |
2565 | BOOL done = p->done; | |
2566 | BOOL unfinished = TRUE; | |
2567 | ||
2568 | /* Loop through all items, reading from the pipe when necessary. The pipe | |
2569 | is set up to be non-blocking, but there are two different Unix mechanisms in | |
2570 | use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file, | |
2571 | and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY, | |
2572 | which returns 0 for both end of file and no more data. We distinguish the | |
2573 | two cases by taking 0 as end of file only when we know the process has | |
2574 | completed. | |
2575 | ||
2576 | Each separate item is written to the pipe in a single write(), and as they are | |
2577 | all short items, the writes will all be atomic and we should never find | |
2578 | ourselves in the position of having read an incomplete item. */ | |
2579 | ||
2580 | DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n", | |
2581 | (int)p->pid, eop? "ended" : "not ended"); | |
2582 | ||
2583 | while (!done) | |
2584 | { | |
2585 | retry_item *r, **rp; | |
2586 | int remaining = endptr - ptr; | |
2587 | ||
2588 | /* Read (first time) or top up the chars in the buffer if necessary. | |
2589 | There will be only one read if we get all the available data (i.e. don't | |
2590 | fill the buffer completely). */ | |
2591 | ||
2592 | if (remaining < 500 && unfinished) | |
2593 | { | |
2594 | int len; | |
2595 | int available = big_buffer_size - remaining; | |
2596 | ||
2597 | if (remaining > 0) memmove(big_buffer, ptr, remaining); | |
2598 | ||
2599 | ptr = big_buffer; | |
2600 | endptr = big_buffer + remaining; | |
2601 | len = read(fd, endptr, available); | |
2602 | ||
2603 | DEBUG(D_deliver) debug_printf("read() yielded %d\n", len); | |
2604 | ||
2605 | /* If the result is EAGAIN and the process is not complete, just | |
2606 | stop reading any more and process what we have already. */ | |
2607 | ||
2608 | if (len < 0) | |
2609 | { | |
2610 | if (!eop && errno == EAGAIN) len = 0; else | |
2611 | { | |
2612 | msg = string_sprintf("failed to read pipe from transport process " | |
2613 | "%d for transport %s: %s", pid, addr->transport->driver_name, | |
2614 | strerror(errno)); | |
2615 | break; | |
2616 | } | |
2617 | } | |
2618 | ||
2619 | /* If the length is zero (eof or no-more-data), just process what we | |
2620 | already have. Note that if the process is still running and we have | |
2621 | read all the data in the pipe (but less that "available") then we | |
2622 | won't read any more, as "unfinished" will get set FALSE. */ | |
2623 | ||
2624 | endptr += len; | |
2625 | unfinished = len == available; | |
2626 | } | |
2627 | ||
2628 | /* If we are at the end of the available data, exit the loop. */ | |
2629 | ||
2630 | if (ptr >= endptr) break; | |
2631 | ||
2632 | /* Handle each possible type of item, assuming the complete item is | |
2633 | available in store. */ | |
2634 | ||
2635 | switch (*ptr++) | |
2636 | { | |
2637 | /* Host items exist only if any hosts were marked unusable. Match | |
2638 | up by checking the IP address. */ | |
2639 | ||
2640 | case 'H': | |
2641 | for (h = addrlist->host_list; h != NULL; h = h->next) | |
2642 | { | |
2643 | if (h->address == NULL || Ustrcmp(h->address, ptr+2) != 0) continue; | |
2644 | h->status = ptr[0]; | |
2645 | h->why = ptr[1]; | |
2646 | } | |
2647 | ptr += 2; | |
2648 | while (*ptr++); | |
2649 | break; | |
2650 | ||
2651 | /* Retry items are sent in a preceding R item for each address. This is | |
2652 | kept separate to keep each message short enough to guarantee it won't | |
2653 | be split in the pipe. Hopefully, in the majority of cases, there won't in | |
2654 | fact be any retry items at all. | |
2655 | ||
2656 | The complete set of retry items might include an item to delete a | |
2657 | routing retry if there was a previous routing delay. However, routing | |
2658 | retries are also used when a remote transport identifies an address error. | |
2659 | In that case, there may also be an "add" item for the same key. Arrange | |
2660 | that a "delete" item is dropped in favour of an "add" item. */ | |
2661 | ||
2662 | case 'R': | |
2663 | if (addr == NULL) goto ADDR_MISMATCH; | |
2664 | ||
2665 | DEBUG(D_deliver|D_retry) | |
2666 | debug_printf("reading retry information for %s from subprocess\n", | |
2667 | ptr+1); | |
2668 | ||
2669 | /* Cut out any "delete" items on the list. */ | |
2670 | ||
2671 | for (rp = &(addr->retries); (r = *rp) != NULL; rp = &(r->next)) | |
2672 | { | |
2673 | if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */ | |
2674 | { | |
2675 | if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */ | |
2676 | *rp = r->next; /* Excise a delete item */ | |
2677 | DEBUG(D_deliver|D_retry) | |
2678 | debug_printf(" existing delete item dropped\n"); | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | /* We want to add a delete item only if there is no non-delete item; | |
2683 | however we still have to step ptr through the data. */ | |
2684 | ||
2685 | if (r == NULL || (*ptr & rf_delete) == 0) | |
2686 | { | |
2687 | r = store_get(sizeof(retry_item)); | |
2688 | r->next = addr->retries; | |
2689 | addr->retries = r; | |
2690 | r->flags = *ptr++; | |
2691 | r->key = string_copy(ptr); | |
2692 | while (*ptr++); | |
2693 | memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno)); | |
2694 | ptr += sizeof(r->basic_errno); | |
2695 | memcpy(&(r->more_errno), ptr, sizeof(r->more_errno)); | |
2696 | ptr += sizeof(r->more_errno); | |
2697 | r->message = (*ptr)? string_copy(ptr) : NULL; | |
2698 | DEBUG(D_deliver|D_retry) | |
2699 | debug_printf(" added %s item\n", | |
2700 | ((r->flags & rf_delete) == 0)? "retry" : "delete"); | |
2701 | } | |
2702 | ||
2703 | else | |
2704 | { | |
2705 | DEBUG(D_deliver|D_retry) | |
2706 | debug_printf(" delete item not added: non-delete item exists\n"); | |
2707 | ptr++; | |
2708 | while(*ptr++); | |
2709 | ptr += sizeof(r->basic_errno) + sizeof(r->more_errno); | |
2710 | } | |
2711 | ||
2712 | while(*ptr++); | |
2713 | break; | |
2714 | ||
2715 | /* Put the amount of data written into the parlist block */ | |
2716 | ||
2717 | case 'S': | |
2718 | memcpy(&(p->transport_count), ptr, sizeof(transport_count)); | |
2719 | ptr += sizeof(transport_count); | |
2720 | break; | |
2721 | ||
2722 | /* Address items are in the order of items on the address chain. We | |
2723 | remember the current address value in case this function is called | |
2724 | several times to empty the pipe in stages. Information about delivery | |
2725 | over TLS is sent in a preceding X item for each address. We don't put | |
2726 | it in with the other info, in order to keep each message short enough to | |
2727 | guarantee it won't be split in the pipe. */ | |
2728 | ||
2729 | #ifdef SUPPORT_TLS | |
2730 | case 'X': | |
2731 | if (addr == NULL) goto ADDR_MISMATCH; /* Below, in 'A' handler */ | |
2732 | addr->cipher = (*ptr)? string_copy(ptr) : NULL; | |
2733 | while (*ptr++); | |
2734 | addr->peerdn = (*ptr)? string_copy(ptr) : NULL; | |
2735 | while (*ptr++); | |
2736 | break; | |
2737 | #endif | |
2738 | ||
2739 | case 'A': | |
2740 | if (addr == NULL) | |
2741 | { | |
2742 | ADDR_MISMATCH: | |
2743 | msg = string_sprintf("address count mismatch for data read from pipe " | |
2744 | "for transport process %d for transport %s", pid, | |
2745 | addrlist->transport->driver_name); | |
2746 | done = TRUE; | |
2747 | break; | |
2748 | } | |
2749 | ||
2750 | addr->transport_return = *ptr++; | |
2751 | addr->special_action = *ptr++; | |
2752 | memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno)); | |
2753 | ptr += sizeof(addr->basic_errno); | |
2754 | memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno)); | |
2755 | ptr += sizeof(addr->more_errno); | |
2756 | memcpy(&(addr->flags), ptr, sizeof(addr->flags)); | |
2757 | ptr += sizeof(addr->flags); | |
2758 | addr->message = (*ptr)? string_copy(ptr) : NULL; | |
2759 | while(*ptr++); | |
2760 | addr->user_message = (*ptr)? string_copy(ptr) : NULL; | |
2761 | while(*ptr++); | |
2762 | ||
2763 | /* Always two strings for host information, followed by the port number */ | |
2764 | ||
2765 | if (*ptr != 0) | |
2766 | { | |
2767 | h = store_get(sizeof(host_item)); | |
2768 | h->name = string_copy(ptr); | |
2769 | while (*ptr++); | |
2770 | h->address = string_copy(ptr); | |
2771 | while(*ptr++); | |
2772 | memcpy(&(h->port), ptr, sizeof(h->port)); | |
2773 | ptr += sizeof(h->port); | |
2774 | addr->host_used = h; | |
2775 | } | |
2776 | else ptr++; | |
2777 | ||
2778 | /* Finished with this address */ | |
2779 | ||
2780 | addr = addr->next; | |
2781 | break; | |
2782 | ||
2783 | /* Z marks the logical end of the data. It is followed by '0' if | |
2784 | continue_transport was NULL at the end of transporting, otherwise '1'. | |
2785 | We need to know when it becomes NULL during a delivery down a passed SMTP | |
2786 | channel so that we don't try to pass anything more down it. Of course, for | |
2787 | most normal messages it will remain NULL all the time. */ | |
2788 | ||
2789 | case 'Z': | |
2790 | if (*ptr == '0') | |
2791 | { | |
2792 | continue_transport = NULL; | |
2793 | continue_hostname = NULL; | |
2794 | } | |
2795 | done = TRUE; | |
2796 | DEBUG(D_deliver) debug_printf("Z%c item read\n", *ptr); | |
2797 | break; | |
2798 | ||
2799 | /* Anything else is a disaster. */ | |
2800 | ||
2801 | default: | |
2802 | msg = string_sprintf("malformed data (%d) read from pipe for transport " | |
2803 | "process %d for transport %s", ptr[-1], pid, | |
2804 | addr->transport->driver_name); | |
2805 | done = TRUE; | |
2806 | break; | |
2807 | } | |
2808 | } | |
2809 | ||
2810 | /* The done flag is inspected externally, to determine whether or not to | |
2811 | call the function again when the process finishes. */ | |
2812 | ||
2813 | p->done = done; | |
2814 | ||
2815 | /* If the process hadn't finished, and we haven't seen the end of the data | |
2816 | or suffered a disaster, update the rest of the state, and return FALSE to | |
2817 | indicate "not finished". */ | |
2818 | ||
2819 | if (!eop && !done) | |
2820 | { | |
2821 | p->addr = addr; | |
2822 | p->msg = msg; | |
2823 | return FALSE; | |
2824 | } | |
2825 | ||
2826 | /* Close our end of the pipe, to prevent deadlock if the far end is still | |
2827 | pushing stuff into it. */ | |
2828 | ||
2829 | close(fd); | |
2830 | p->fd = -1; | |
2831 | ||
2832 | /* If we have finished without error, but haven't had data for every address, | |
2833 | something is wrong. */ | |
2834 | ||
2835 | if (msg == NULL && addr != NULL) | |
2836 | msg = string_sprintf("insufficient address data read from pipe " | |
2837 | "for transport process %d for transport %s", pid, | |
2838 | addr->transport->driver_name); | |
2839 | ||
2840 | /* If an error message is set, something has gone wrong in getting back | |
2841 | the delivery data. Put the message into each address and freeze it. */ | |
2842 | ||
2843 | if (msg != NULL) | |
2844 | { | |
2845 | for (addr = addrlist; addr != NULL; addr = addr->next) | |
2846 | { | |
2847 | addr->transport_return = DEFER; | |
2848 | addr->special_action = SPECIAL_FREEZE; | |
2849 | addr->message = msg; | |
2850 | } | |
2851 | } | |
2852 | ||
2853 | /* Return TRUE to indicate we have got all we need from this process, even | |
2854 | if it hasn't actually finished yet. */ | |
2855 | ||
2856 | return TRUE; | |
2857 | } | |
2858 | ||
2859 | ||
2860 | ||
2861 | /************************************************* | |
2862 | * Post-process a set of remote addresses * | |
2863 | *************************************************/ | |
2864 | ||
2865 | /* Do what has to be done immediately after a remote delivery for each set of | |
2866 | addresses, then re-write the spool if necessary. Note that post_process_one | |
2867 | puts the address on an appropriate queue; hence we must fish off the next | |
2868 | one first. This function is also called if there is a problem with setting | |
2869 | up a subprocess to do a remote delivery in parallel. In this case, the final | |
2870 | argument contains a message, and the action must be forced to DEFER. | |
2871 | ||
2872 | Argument: | |
2873 | addr pointer to chain of address items | |
2874 | logflags flags for logging | |
2875 | msg NULL for normal cases; -> error message for unexpected problems | |
2876 | fallback TRUE if processing fallback hosts | |
2877 | ||
2878 | Returns: nothing | |
2879 | */ | |
2880 | ||
2881 | static void | |
2882 | remote_post_process(address_item *addr, int logflags, uschar *msg, | |
2883 | BOOL fallback) | |
2884 | { | |
2885 | host_item *h; | |
2886 | ||
2887 | /* If any host addresses were found to be unusable, add them to the unusable | |
2888 | tree so that subsequent deliveries don't try them. */ | |
2889 | ||
2890 | for (h = addr->host_list; h != NULL; h = h->next) | |
2891 | { | |
2892 | if (h->address == NULL) continue; | |
2893 | if (h->status >= hstatus_unusable) tree_add_unusable(h); | |
2894 | } | |
2895 | ||
2896 | /* Now handle each address on the chain. The transport has placed '=' or '-' | |
2897 | into the special_action field for each successful delivery. */ | |
2898 | ||
2899 | while (addr != NULL) | |
2900 | { | |
2901 | address_item *next = addr->next; | |
2902 | ||
2903 | /* If msg == NULL (normal processing) and the result is DEFER and we are | |
2904 | processing the main hosts and there are fallback hosts available, put the | |
2905 | address on the list for fallback delivery. */ | |
2906 | ||
2907 | if (addr->transport_return == DEFER && | |
2908 | addr->fallback_hosts != NULL && | |
2909 | !fallback && | |
2910 | msg == NULL) | |
2911 | { | |
2912 | addr->host_list = addr->fallback_hosts; | |
2913 | addr->next = addr_fallback; | |
2914 | addr_fallback = addr; | |
2915 | DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address); | |
2916 | } | |
2917 | ||
2918 | /* If msg is set (=> unexpected problem), set it in the address before | |
2919 | doing the ordinary post processing. */ | |
2920 | ||
2921 | else | |
2922 | { | |
2923 | if (msg != NULL) | |
2924 | { | |
2925 | addr->message = msg; | |
2926 | addr->transport_return = DEFER; | |
2927 | } | |
2928 | (void)post_process_one(addr, addr->transport_return, logflags, | |
2929 | DTYPE_TRANSPORT, addr->special_action); | |
2930 | } | |
2931 | ||
2932 | /* Next address */ | |
2933 | ||
2934 | addr = next; | |
2935 | } | |
2936 | ||
2937 | /* If we have just delivered down a passed SMTP channel, and that was | |
2938 | the last address, the channel will have been closed down. Now that | |
2939 | we have logged that delivery, set continue_sequence to 1 so that | |
2940 | any subsequent deliveries don't get "*" incorrectly logged. */ | |
2941 | ||
2942 | if (continue_transport == NULL) continue_sequence = 1; | |
2943 | } | |
2944 | ||
2945 | ||
2946 | ||
2947 | /************************************************* | |
2948 | * Wait for one remote delivery subprocess * | |
2949 | *************************************************/ | |
2950 | ||
2951 | /* This function is called while doing remote deliveries when either the | |
2952 | maximum number of processes exist and we need one to complete so that another | |
2953 | can be created, or when waiting for the last ones to complete. It must wait for | |
2954 | the completion of one subprocess, empty the control block slot, and return a | |
2955 | pointer to the address chain. | |
2956 | ||
2957 | Arguments: none | |
2958 | Returns: pointer to the chain of addresses handled by the process; | |
2959 | NULL if no subprocess found - this is an unexpected error | |
2960 | */ | |
2961 | ||
2962 | static address_item * | |
2963 | par_wait(void) | |
2964 | { | |
2965 | int poffset, status; | |
2966 | address_item *addr, *addrlist; | |
2967 | pid_t pid; | |
2968 | ||
2969 | set_process_info("delivering %s: waiting for a remote delivery subprocess " | |
2970 | "to finish", message_id); | |
2971 | ||
2972 | /* Loop until either a subprocess completes, or there are no subprocesses in | |
2973 | existence - in which case give an error return. We cannot proceed just by | |
2974 | waiting for a completion, because a subprocess may have filled up its pipe, and | |
2975 | be waiting for it to be emptied. Therefore, if no processes have finished, we | |
2976 | wait for one of the pipes to acquire some data by calling select(), with a | |
2977 | timeout just in case. | |
2978 | ||
2979 | The simple approach is just to iterate after reading data from a ready pipe. | |
2980 | This leads to non-ideal behaviour when the subprocess has written its final Z | |
2981 | item, closed the pipe, and is in the process of exiting (the common case). A | |
2982 | call to waitpid() yields nothing completed, but select() shows the pipe ready - | |
2983 | reading it yields EOF, so you end up with busy-waiting until the subprocess has | |
2984 | actually finished. | |
2985 | ||
2986 | To avoid this, if all the data that is needed has been read from a subprocess | |
2987 | after select(), an explicit wait() for it is done. We know that all it is doing | |
2988 | is writing to the pipe and then exiting, so the wait should not be long. | |
2989 | ||
2990 | The non-blocking waitpid() is to some extent just insurance; if we could | |
2991 | reliably detect end-of-file on the pipe, we could always know when to do a | |
2992 | blocking wait() for a completed process. However, because some systems use | |
2993 | NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to | |
2994 | use code that functions without the need to recognize EOF. | |
2995 | ||
2996 | There's a double loop here just in case we end up with a process that is not in | |
2997 | the list of remote delivery processes. Something has obviously gone wrong if | |
2998 | this is the case. (For example, a process that is incorrectly left over from | |
2999 | routing or local deliveries might be found.) The damage can be minimized by | |
3000 | looping back and looking for another process. If there aren't any, the error | |
3001 | return will happen. */ | |
3002 | ||
3003 | for (;;) /* Normally we do not repeat this loop */ | |
3004 | { | |
3005 | while ((pid = waitpid(-1, &status, WNOHANG)) <= 0) | |
3006 | { | |
3007 | struct timeval tv; | |
3008 | fd_set select_pipes; | |
3009 | int maxpipe, readycount; | |
3010 | ||
3011 | /* A return value of -1 can mean several things. If errno != ECHILD, it | |
3012 | either means invalid options (which we discount), or that this process was | |
3013 | interrupted by a signal. Just loop to try the waitpid() again. | |
3014 | ||
3015 | If errno == ECHILD, waitpid() is telling us that there are no subprocesses | |
3016 | in existence. This should never happen, and is an unexpected error. | |
3017 | However, there is a nasty complication when running under Linux. If "strace | |
3018 | -f" is being used under Linux to trace this process and its children, | |
3019 | subprocesses are "stolen" from their parents and become the children of the | |
3020 | tracing process. A general wait such as the one we've just obeyed returns | |
3021 | as if there are no children while subprocesses are running. Once a | |
3022 | subprocess completes, it is restored to the parent, and waitpid(-1) finds | |
3023 | it. Thanks to Joachim Wieland for finding all this out and suggesting a | |
3024 | palliative. | |
3025 | ||
3026 | This does not happen using "truss" on Solaris, nor (I think) with other | |
3027 | tracing facilities on other OS. It seems to be specific to Linux. | |
3028 | ||
3029 | What we do to get round this is to use kill() to see if any of our | |
3030 | subprocesses are still in existence. If kill() gives an OK return, we know | |
3031 | it must be for one of our processes - it can't be for a re-use of the pid, | |
3032 | because if our process had finished, waitpid() would have found it. If any | |
3033 | of our subprocesses are in existence, we proceed to use select() as if | |
3034 | waitpid() had returned zero. I think this is safe. */ | |
3035 | ||
3036 | if (pid < 0) | |
3037 | { | |
3038 | if (errno != ECHILD) continue; /* Repeats the waitpid() */ | |
3039 | ||
3040 | DEBUG(D_deliver) | |
3041 | debug_printf("waitpid() returned -1/ECHILD: checking explicitly " | |
3042 | "for process existence\n"); | |
3043 | ||
3044 | for (poffset = 0; poffset < remote_max_parallel; poffset++) | |
3045 | { | |
3046 | if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0) | |
3047 | { | |
3048 | DEBUG(D_deliver) debug_printf("process %d still exists: assume " | |
3049 | "stolen by strace\n", (int)pid); | |
3050 | break; /* With poffset set */ | |
3051 | } | |
3052 | } | |
3053 | ||
3054 | if (poffset >= remote_max_parallel) | |
3055 | { | |
3056 | DEBUG(D_deliver) debug_printf("*** no delivery children found\n"); | |
3057 | return NULL; /* This is the error return */ | |
3058 | } | |
3059 | } | |
3060 | ||
3061 | /* A pid value greater than 0 breaks the "while" loop. A negative value has | |
3062 | been handled above. A return value of zero means that there is at least one | |
3063 | subprocess, but there are no completed subprocesses. See if any pipes are | |
3064 | ready with any data for reading. */ | |
3065 | ||
3066 | DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n"); | |
3067 | ||
3068 | maxpipe = 0; | |
3069 | FD_ZERO(&select_pipes); | |
3070 | for (poffset = 0; poffset < remote_max_parallel; poffset++) | |
3071 | { | |
3072 | if (parlist[poffset].pid != 0) | |
3073 | { | |
3074 | int fd = parlist[poffset].fd; | |
3075 | FD_SET(fd, &select_pipes); | |
3076 | if (fd > maxpipe) maxpipe = fd; | |
3077 | } | |
3078 | } | |
3079 | ||
3080 | /* Stick in a 60-second timeout, just in case. */ | |
3081 | ||
3082 | tv.tv_sec = 60; | |
3083 | tv.tv_usec = 0; | |
3084 | ||
3085 | readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes, | |
3086 | NULL, NULL, &tv); | |
3087 | ||
3088 | /* Scan through the pipes and read any that are ready; use the count | |
3089 | returned by select() to stop when there are no more. Select() can return | |
3090 | with no processes (e.g. if interrupted). This shouldn't matter. | |
3091 | ||
3092 | If par_read_pipe() returns TRUE, it means that either the terminating Z was | |
3093 | read, or there was a disaster. In either case, we are finished with this | |
3094 | process. Do an explicit wait() for the process and break the main loop if | |
3095 | it succeeds. | |
3096 | ||
3097 | It turns out that we have to deal with the case of an interrupted system | |
3098 | call, which can happen on some operating systems if the signal handling is | |
3099 | set up to do that by default. */ | |
3100 | ||
3101 | for (poffset = 0; | |
3102 | readycount > 0 && poffset < remote_max_parallel; | |
3103 | poffset++) | |
3104 | { | |
3105 | if ((pid = parlist[poffset].pid) != 0 && | |
3106 | FD_ISSET(parlist[poffset].fd, &select_pipes)) | |
3107 | { | |
3108 | readycount--; | |
3109 | if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */ | |
3110 | { | |
3111 | for (;;) /* Loop for signals */ | |
3112 | { | |
3113 | pid_t endedpid = waitpid(pid, &status, 0); | |
3114 | if (endedpid == pid) goto PROCESS_DONE; | |
3115 | if (endedpid != (pid_t)(-1) || errno != EINTR) | |
3116 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return " | |
3117 | "%d (errno = %d) from waitpid() for process %d", | |
3118 | (int)endedpid, errno, (int)pid); | |
3119 | } | |
3120 | } | |
3121 | } | |
3122 | } | |
3123 | ||
3124 | /* Now go back and look for a completed subprocess again. */ | |
3125 | } | |
3126 | ||
3127 | /* A completed process was detected by the non-blocking waitpid(). Find the | |
3128 | data block that corresponds to this subprocess. */ | |
3129 | ||
3130 | for (poffset = 0; poffset < remote_max_parallel; poffset++) | |
3131 | if (pid == parlist[poffset].pid) break; | |
3132 | ||
3133 | /* Found the data block; this is a known remote delivery process. We don't | |
3134 | need to repeat the outer loop. This should be what normally happens. */ | |
3135 | ||
3136 | if (poffset < remote_max_parallel) break; | |
3137 | ||
3138 | /* This situation is an error, but it's probably better to carry on looking | |
3139 | for another process than to give up (as we used to do). */ | |
3140 | ||
3141 | log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote " | |
3142 | "transport process list", pid); | |
3143 | } /* End of the "for" loop */ | |
3144 | ||
3145 | /* Come here when all the data was completely read after a select(), and | |
3146 | the process in pid has been wait()ed for. */ | |
3147 | ||
3148 | PROCESS_DONE: | |
3149 | ||
3150 | DEBUG(D_deliver) | |
3151 | { | |
3152 | if (status == 0) | |
3153 | debug_printf("remote delivery process %d ended\n", (int)pid); | |
3154 | else | |
3155 | debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid, | |
3156 | status); | |
3157 | } | |
3158 | ||
3159 | set_process_info("delivering %s", message_id); | |
3160 | ||
3161 | /* Get the chain of processed addresses */ | |
3162 | ||
3163 | addrlist = parlist[poffset].addrlist; | |
3164 | ||
3165 | /* If the process did not finish cleanly, record an error and freeze (except | |
3166 | for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed, | |
3167 | in case the delivery did actually happen. */ | |
3168 | ||
3169 | if ((status & 0xffff) != 0) | |
3170 | { | |
3171 | uschar *msg; | |
3172 | int msb = (status >> 8) & 255; | |
3173 | int lsb = status & 255; | |
3174 | int code = (msb == 0)? (lsb & 0x7f) : msb; | |
3175 | ||
3176 | msg = string_sprintf("%s transport process returned non-zero status 0x%04x: " | |
3177 | "%s %d", | |
3178 | addrlist->transport->driver_name, | |
3179 | status, | |
3180 | (msb == 0)? "terminated by signal" : "exit code", | |
3181 | code); | |
3182 | ||
3183 | if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT)) | |
3184 | addrlist->special_action = SPECIAL_FREEZE; | |
3185 | ||
3186 | for (addr = addrlist; addr != NULL; addr = addr->next) | |
3187 | { | |
3188 | addr->transport_return = DEFER; | |
3189 | addr->message = msg; | |
3190 | } | |
3191 | ||
3192 | remove_journal = FALSE; | |
3193 | } | |
3194 | ||
3195 | /* Else complete reading the pipe to get the result of the delivery, if all | |
3196 | the data has not yet been obtained. */ | |
3197 | ||
3198 | else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE); | |
3199 | ||
3200 | /* Put the data count and return path into globals, mark the data slot unused, | |
3201 | decrement the count of subprocesses, and return the address chain. */ | |
3202 | ||
3203 | transport_count = parlist[poffset].transport_count; | |
3204 | used_return_path = parlist[poffset].return_path; | |
3205 | parlist[poffset].pid = 0; | |
3206 | parcount--; | |
3207 | return addrlist; | |
3208 | } | |
3209 | ||
3210 | ||
3211 | ||
3212 | /************************************************* | |
3213 | * Wait for subprocesses and post-process * | |
3214 | *************************************************/ | |
3215 | ||
3216 | /* This function waits for subprocesses until the number that are still running | |
3217 | is below a given threshold. For each complete subprocess, the addresses are | |
3218 | post-processed. If we can't find a running process, there is some shambles. | |
3219 | Better not bomb out, as that might lead to multiple copies of the message. Just | |
3220 | log and proceed as if all done. | |
3221 | ||
3222 | Arguments: | |
3223 | max maximum number of subprocesses to leave running | |
3224 | fallback TRUE if processing fallback hosts | |
3225 | ||
3226 | Returns: nothing | |
3227 | */ | |
3228 | ||
3229 | static void | |
3230 | par_reduce(int max, BOOL fallback) | |
3231 | { | |
3232 | while (parcount > max) | |
3233 | { | |
3234 | address_item *doneaddr = par_wait(); | |
3235 | if (doneaddr == NULL) | |
3236 | { | |
3237 | log_write(0, LOG_MAIN|LOG_PANIC, | |
3238 | "remote delivery process count got out of step"); | |
3239 | parcount = 0; | |
3240 | } | |
3241 | else remote_post_process(doneaddr, LOG_MAIN, NULL, fallback); | |
3242 | } | |
3243 | } | |
3244 | ||
3245 | ||
3246 | ||
3247 | ||
3248 | /************************************************* | |
3249 | * Do remote deliveries * | |
3250 | *************************************************/ | |
3251 | ||
3252 | /* This function is called to process the addresses in addr_remote. We must | |
3253 | pick off the queue all addresses that have the same transport, remote | |
3254 | destination, and errors address, and hand them to the transport in one go, | |
3255 | subject to some configured limitations. If this is a run to continue delivering | |
3256 | to an existing delivery channel, skip all but those addresses that can go to | |
3257 | that channel. The skipped addresses just get deferred. | |
3258 | ||
3259 | If mua_wrapper is set, all addresses must be able to be sent in a single | |
3260 | transaction. If not, this function yields FALSE. | |
3261 | ||
3262 | In Exim 4, remote deliveries are always done in separate processes, even | |
3263 | if remote_max_parallel = 1 or if there's only one delivery to do. The reason | |
3264 | is so that the base process can retain privilege. This makes the | |
3265 | implementation of fallback transports feasible (though not initially done.) | |
3266 | ||
3267 | We create up to the configured number of subprocesses, each of which passes | |
3268 | back the delivery state via a pipe. (However, when sending down an existing | |
3269 | connection, remote_max_parallel is forced to 1.) | |
3270 | ||
3271 | Arguments: | |
3272 | fallback TRUE if processing fallback hosts | |
3273 | ||
3274 | Returns: TRUE normally | |
3275 | FALSE if mua_wrapper is set and the addresses cannot all be sent | |
3276 | in one transaction | |
3277 | */ | |
3278 | ||
3279 | static BOOL | |
3280 | do_remote_deliveries(BOOL fallback) | |
3281 | { | |
3282 | int parmax; | |
3283 | int delivery_count; | |
3284 | int poffset; | |
3285 | ||
3286 | parcount = 0; /* Number of executing subprocesses */ | |
3287 | ||
3288 | /* When sending down an existing channel, only do one delivery at a time. | |
3289 | We use a local variable (parmax) to hold the maximum number of processes; | |
3290 | this gets reduced from remote_max_parallel if we can't create enough pipes. */ | |
3291 | ||
3292 | if (continue_transport != NULL) remote_max_parallel = 1; | |
3293 | parmax = remote_max_parallel; | |
3294 | ||
3295 | /* If the data for keeping a list of processes hasn't yet been | |
3296 | set up, do so. */ | |
3297 | ||
3298 | if (parlist == NULL) | |
3299 | { | |
3300 | parlist = store_get(remote_max_parallel * sizeof(pardata)); | |
3301 | for (poffset = 0; poffset < remote_max_parallel; poffset++) | |
3302 | parlist[poffset].pid = 0; | |
3303 | } | |
3304 | ||
3305 | /* Now loop for each remote delivery */ | |
3306 | ||
3307 | for (delivery_count = 0; addr_remote != NULL; delivery_count++) | |
3308 | { | |
3309 | pid_t pid; | |
3310 | uid_t uid; | |
3311 | gid_t gid; | |
3312 | int pfd[2]; | |
3313 | int address_count = 1; | |
3314 | int address_count_max; | |
3315 | BOOL multi_domain; | |
3316 | BOOL use_initgroups; | |
3317 | BOOL pipe_done = FALSE; | |
3318 | transport_instance *tp; | |
3319 | address_item **anchor = &addr_remote; | |
3320 | address_item *addr = addr_remote; | |
3321 | address_item *last = addr; | |
3322 | address_item *next; | |
3323 | ||
3324 | /* Pull the first address right off the list. */ | |
3325 | ||
3326 | addr_remote = addr->next; | |
3327 | addr->next = NULL; | |
3328 | ||
3329 | DEBUG(D_deliver|D_transport) | |
3330 | debug_printf("--------> %s <--------\n", addr->address); | |
3331 | ||
3332 | /* If no transport has been set, there has been a big screw-up somewhere. */ | |
3333 | ||
3334 | if ((tp = addr->transport) == NULL) | |
3335 | { | |
3336 | disable_logging = FALSE; /* Jic */ | |
3337 | remote_post_process(addr, LOG_MAIN|LOG_PANIC, | |
3338 | US"No transport set by router", fallback); | |
3339 | continue; | |
3340 | } | |
3341 | ||
3342 | /* Check that this base address hasn't previously been delivered to this | |
3343 | transport. The check is necessary at this point to handle homonymic addresses | |
3344 | correctly in cases where the pattern of redirection changes between delivery | |
3345 | attempts. Non-homonymic previous delivery is detected earlier, at routing | |
3346 | time. */ | |
3347 | ||
3348 | if (previously_transported(addr)) continue; | |
3349 | ||
3350 | /* Force failure if the message is too big. */ | |
3351 | ||
3352 | if (tp->message_size_limit != NULL) | |
3353 | { | |
3354 | int rc = check_message_size(tp, addr); | |
3355 | if (rc != OK) | |
3356 | { | |
3357 | addr->transport_return = rc; | |
3358 | remote_post_process(addr, LOG_MAIN, NULL, fallback); | |
3359 | continue; | |
3360 | } | |
3361 | } | |
3362 | ||
3363 | /* Get the flag which specifies whether the transport can handle different | |
3364 | domains that nevertheless resolve to the same set of hosts. */ | |
3365 | ||
3366 | multi_domain = tp->multi_domain; | |
3367 | ||
3368 | /* Get the maximum it can handle in one envelope, with zero meaning | |
3369 | unlimited, which is forced for the MUA wrapper case. */ | |
3370 | ||
3371 | address_count_max = tp->max_addresses; | |
3372 | if (address_count_max == 0 || mua_wrapper) address_count_max = 999999; | |
3373 | ||
3374 | ||
3375 | /************************************************************************/ | |
3376 | /***** This is slightly experimental code, but should be safe. *****/ | |
3377 | ||
3378 | /* The address_count_max value is the maximum number of addresses that the | |
3379 | transport can send in one envelope. However, the transport must be capable of | |
3380 | dealing with any number of addresses. If the number it gets exceeds its | |
3381 | envelope limitation, it must send multiple copies of the message. This can be | |
3382 | done over a single connection for SMTP, so uses less resources than making | |
3383 | multiple connections. On the other hand, if remote_max_parallel is greater | |
3384 | than one, it is perhaps a good idea to use parallel processing to move the | |
3385 | message faster, even if that results in multiple simultaneous connections to | |
3386 | the same host. | |
3387 | ||
3388 | How can we come to some compromise between these two ideals? What we do is to | |
3389 | limit the number of addresses passed to a single instance of a transport to | |
3390 | the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total | |
3391 | number of addresses routed to remote transports divided by | |
3392 | remote_max_parallel. For example, if the message has 100 remote recipients, | |
3393 | remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at | |
3394 | once. But if rcpt_max is 100, we could send up to 100. | |
3395 | ||
3396 | Of course, not all the remotely addresses in a message are going to go to the | |
3397 | same set of hosts (except in smarthost configurations), so this is just a | |
3398 | heuristic way of dividing up the work. | |
3399 | ||
3400 | Furthermore (1), because this may not be wanted in some cases, and also to | |
3401 | cope with really pathological cases, there is also a limit to the number of | |
3402 | messages that are sent over one connection. This is the same limit that is | |
3403 | used when sending several different messages over the same connection. | |
3404 | Continue_sequence is set when in this situation, to the number sent so | |
3405 | far, including this message. | |
3406 | ||
3407 | Furthermore (2), when somebody explicitly sets the maximum value to 1, it | |
3408 | is probably because they are using VERP, in which case they want to pass only | |
3409 | one address at a time to the transport, in order to be able to use | |
3410 | $local_part and $domain in constructing a new return path. We could test for | |
3411 | the use of these variables, but as it is so likely they will be used when the | |
3412 | maximum is 1, we don't bother. Just leave the value alone. */ | |
3413 | ||
3414 | if (address_count_max != 1 && | |
3415 | address_count_max < remote_delivery_count/remote_max_parallel) | |
3416 | { | |
3417 | int new_max = remote_delivery_count/remote_max_parallel; | |
3418 | int message_max = tp->connection_max_messages; | |
3419 | if (connection_max_messages >= 0) message_max = connection_max_messages; | |
3420 | message_max -= continue_sequence - 1; | |
3421 | if (message_max > 0 && new_max > address_count_max * message_max) | |
3422 | new_max = address_count_max * message_max; | |
3423 | address_count_max = new_max; | |
3424 | } | |
3425 | ||
3426 | /************************************************************************/ | |
3427 | ||
3428 | ||
3429 | /* Pick off all addresses which have the same transport, errors address, | |
3430 | destination, and extra headers. In some cases they point to the same host | |
3431 | list, but we also need to check for identical host lists generated from | |
3432 | entirely different domains. The host list pointers can be NULL in the case | |
3433 | where the hosts are defined in the transport. There is also a configured | |
3434 | maximum limit of addresses that can be handled at once (see comments above | |
3435 | for how it is computed). */ | |
3436 | ||
3437 | while ((next = *anchor) != NULL && address_count < address_count_max) | |
3438 | { | |
3439 | if ((multi_domain || Ustrcmp(next->domain, addr->domain) == 0) | |
3440 | && | |
3441 | tp == next->transport | |
3442 | && | |
3443 | same_hosts(next->host_list, addr->host_list) | |
3444 | && | |
3445 | same_strings(next->p.errors_address, addr->p.errors_address) | |
3446 | && | |
3447 | same_headers(next->p.extra_headers, addr->p.extra_headers) | |
3448 | && | |
3449 | same_ugid(tp, next, addr) | |
3450 | && | |
3451 | (next->p.remove_headers == addr->p.remove_headers || | |
3452 | (next->p.remove_headers != NULL && | |
3453 | addr->p.remove_headers != NULL && | |
3454 | Ustrcmp(next->p.remove_headers, addr->p.remove_headers) == 0))) | |
3455 | { | |
3456 | *anchor = next->next; | |
3457 | next->next = NULL; | |
3458 | next->first = addr; /* remember top one (for retry processing) */ | |
3459 | last->next = next; | |
3460 | last = next; | |
3461 | address_count++; | |
3462 | } | |
3463 | else anchor = &(next->next); | |
3464 | } | |
3465 | ||
3466 | /* If we are acting as an MUA wrapper, all addresses must go in a single | |
3467 | transaction. If not, put them back on the chain and yield FALSE. */ | |
3468 | ||
3469 | if (mua_wrapper && addr_remote != NULL) | |
3470 | { | |
3471 | last->next = addr_remote; | |
3472 | addr_remote = addr; | |
3473 | return FALSE; | |
3474 | } | |
3475 | ||
3476 | /* Set up the expansion variables for this set of addresses */ | |
3477 | ||
3478 | deliver_set_expansions(addr); | |
3479 | ||
3480 | /* Compute the return path, expanding a new one if required. The old one | |
3481 | must be set first, as it might be referred to in the expansion. */ | |
3482 | ||
3483 | return_path = (addr->p.errors_address != NULL)? | |
3484 | addr->p.errors_address : sender_address; | |
3485 | ||
3486 | if (tp->return_path != NULL) | |
3487 | { | |
3488 | uschar *new_return_path = expand_string(tp->return_path); | |
3489 | if (new_return_path == NULL) | |
3490 | { | |
3491 | if (!expand_string_forcedfail) | |
3492 | { | |
3493 | remote_post_process(addr, LOG_MAIN|LOG_PANIC, | |
3494 | string_sprintf("Failed to expand return path \"%s\": %s", | |
3495 | tp->return_path, expand_string_message), fallback); | |
3496 | continue; | |
3497 | } | |
3498 | } | |
3499 | else return_path = new_return_path; | |
3500 | } | |
3501 | ||
3502 | /* If this transport has a setup function, call it now so that it gets | |
3503 | run in this process and not in any subprocess. That way, the results of | |
3504 | any setup that are retained by the transport can be reusable. */ | |
3505 | ||
3506 | if (tp->setup != NULL) | |
3507 | (void)((tp->setup)(addr->transport, addr, NULL, NULL)); | |
3508 | ||
3509 | /* If this is a run to continue delivery down an already-established | |
3510 | channel, check that this set of addresses matches the transport and | |
3511 | the channel. If it does not, defer the addresses. If a host list exists, | |
3512 | we must check that the continue host is on the list. Otherwise, the | |
3513 | host is set in the transport. */ | |
3514 | ||
3515 | continue_more = FALSE; /* In case got set for the last lot */ | |
3516 | if (continue_transport != NULL) | |
3517 | { | |
3518 | BOOL ok = Ustrcmp(continue_transport, tp->name) == 0; | |
3519 | if (ok && addr->host_list != NULL) | |
3520 | { | |
3521 | host_item *h; | |
3522 | ok = FALSE; | |
3523 | for (h = addr->host_list; h != NULL; h = h->next) | |
3524 | { | |
3525 | if (Ustrcmp(h->name, continue_hostname) == 0) | |
3526 | { ok = TRUE; break; } | |
3527 | } | |
3528 | } | |
3529 | ||
3530 | /* Addresses not suitable; defer or queue for fallback hosts (which | |
3531 | might be the continue host) and skip to next address. */ | |
3532 | ||
3533 | if (!ok) | |
3534 | { | |
3535 | DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n"); | |
3536 | next = addr; | |
3537 | ||
3538 | if (addr->fallback_hosts != NULL && !fallback) | |
3539 | { | |
3540 | for (;;) | |
3541 | { | |
3542 | next->host_list = next->fallback_hosts; | |
3543 | DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address); | |
3544 | if (next->next == NULL) break; | |
3545 | next = next->next; | |
3546 | } | |
3547 | next->next = addr_fallback; | |
3548 | addr_fallback = addr; | |
3549 | } | |
3550 | ||
3551 | else | |
3552 | { | |
3553 | while (next->next != NULL) next = next->next; | |
3554 | next->next = addr_defer; | |
3555 | addr_defer = addr; | |
3556 | } | |
3557 | ||
3558 | continue; | |
3559 | } | |
3560 | ||
3561 | /* Set a flag indicating whether there are further addresses that list | |
3562 | the continued host. This tells the transport to leave the channel open, | |
3563 | but not to pass it to another delivery process. */ | |
3564 | ||
3565 | for (next = addr_remote; next != NULL; next = next->next) | |
3566 | { | |
3567 | host_item *h; | |
3568 | for (h = next->host_list; h != NULL; h = h->next) | |
3569 | { | |
3570 | if (Ustrcmp(h->name, continue_hostname) == 0) | |
3571 | { continue_more = TRUE; break; } | |
3572 | } | |
3573 | } | |
3574 | } | |
3575 | ||
3576 | /* The transports set up the process info themselves as they may connect | |
3577 | to more than one remote machine. They also have to set up the filter | |
3578 | arguments, if required, so that the host name and address are available | |
3579 | for expansion. */ | |
3580 | ||
3581 | transport_filter_argv = NULL; | |
3582 | ||
3583 | /* Find the uid, gid, and use_initgroups setting for this transport. Failure | |
3584 | logs and sets up error messages, so we just post-process and continue with | |
3585 | the next address. */ | |
3586 | ||
3587 | if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) | |
3588 | { | |
3589 | remote_post_process(addr, LOG_MAIN|LOG_PANIC, NULL, fallback); | |
3590 | continue; | |
3591 | } | |
3592 | ||
3593 | /* Create the pipe for inter-process communication. If pipe creation | |
3594 | fails, it is probably because the value of remote_max_parallel is so | |
3595 | large that too many file descriptors for pipes have been created. Arrange | |
3596 | to wait for a process to finish, and then try again. If we still can't | |
3597 | create a pipe when all processes have finished, break the retry loop. */ | |
3598 | ||
3599 | while (!pipe_done) | |
3600 | { | |
3601 | if (pipe(pfd) == 0) pipe_done = TRUE; | |
3602 | else if (parcount > 0) parmax = parcount; | |
3603 | else break; | |
3604 | ||
3605 | /* We need to make the reading end of the pipe non-blocking. There are | |
3606 | two different options for this. Exim is cunningly (I hope!) coded so | |
3607 | that it can use either of them, though it prefers O_NONBLOCK, which | |
3608 | distinguishes between EOF and no-more-data. */ | |
3609 | ||
3610 | #ifdef O_NONBLOCK | |
3611 | fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK); | |
3612 | #else | |
3613 | fcntl(pfd[pipe_read], F_SETFL, O_NDELAY); | |
3614 | #endif | |
3615 | ||
3616 | /* If the maximum number of subprocesses already exist, wait for a process | |
3617 | to finish. If we ran out of file descriptors, parmax will have been reduced | |
3618 | from its initial value of remote_max_parallel. */ | |
3619 | ||
3620 | par_reduce(parmax - 1, fallback); | |
3621 | } | |
3622 | ||
3623 | /* If we failed to create a pipe and there were no processes to wait | |
3624 | for, we have to give up on this one. Do this outside the above loop | |
3625 | so that we can continue the main loop. */ | |
3626 | ||
3627 | if (!pipe_done) | |
3628 | { | |
3629 | remote_post_process(addr, LOG_MAIN|LOG_PANIC, | |
3630 | string_sprintf("unable to create pipe: %s", strerror(errno)), fallback); | |
3631 | continue; | |
3632 | } | |
3633 | ||
3634 | /* Find a free slot in the pardata list. Must do this after the possible | |
3635 | waiting for processes to finish, because a terminating process will free | |
3636 | up a slot. */ | |
3637 | ||
3638 | for (poffset = 0; poffset < remote_max_parallel; poffset++) | |
3639 | if (parlist[poffset].pid == 0) break; | |
3640 | ||
3641 | /* If there isn't one, there has been a horrible disaster. */ | |
3642 | ||
3643 | if (poffset >= remote_max_parallel) | |
3644 | { | |
3645 | close(pfd[pipe_write]); | |
3646 | close(pfd[pipe_read]); | |
3647 | remote_post_process(addr, LOG_MAIN|LOG_PANIC, | |
3648 | US"Unexpectedly no free subprocess slot", fallback); | |
3649 | continue; | |
3650 | } | |
3651 | ||
3652 | /* Now fork a subprocess to do the remote delivery, but before doing so, | |
3653 | ensure that any cached resourses are released so as not to interfere with | |
3654 | what happens in the subprocess. */ | |
3655 | ||
3656 | search_tidyup(); | |
3657 | ||
3658 | if ((pid = fork()) == 0) | |
3659 | { | |
3660 | int fd = pfd[pipe_write]; | |
3661 | host_item *h; | |
3662 | ||
3663 | /* There are weird circumstances in which logging is disabled */ | |
3664 | ||
3665 | disable_logging = tp->disable_logging; | |
3666 | ||
3667 | /* Show pids on debug output if parallelism possible */ | |
3668 | ||
3669 | if (parmax > 1 && (parcount > 0 || addr_remote != NULL)) | |
3670 | { | |
3671 | DEBUG(D_any|D_v) debug_selector |= D_pid; | |
3672 | DEBUG(D_deliver) debug_printf("Remote delivery process started\n"); | |
3673 | } | |
3674 | ||
3675 | /* Reset the random number generator, so different processes don't all | |
3676 | have the same sequence. In the test harness we want different, but | |
3677 | predictable settings for each delivery process, so do something explicit | |
3678 | here rather they rely on the fixed reset in the random number function. */ | |
3679 | ||
3680 | random_seed = running_in_test_harness? 42 + 2*delivery_count : 0; | |
3681 | ||
3682 | /* Set close-on-exec on the pipe so that it doesn't get passed on to | |
3683 | a new process that may be forked to do another delivery down the same | |
3684 | SMTP connection. */ | |
3685 | ||
3686 | fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); | |
3687 | ||
3688 | /* Close open file descriptors for the pipes of other processes | |
3689 | that are running in parallel. */ | |
3690 | ||
3691 | for (poffset = 0; poffset < remote_max_parallel; poffset++) | |
3692 | if (parlist[poffset].pid != 0) close(parlist[poffset].fd); | |
3693 | ||
3694 | /* This process has inherited a copy of the file descriptor | |
3695 | for the data file, but its file pointer is shared with all the | |
3696 | other processes running in parallel. Therefore, we have to re-open | |
3697 | the file in order to get a new file descriptor with its own | |
3698 | file pointer. We don't need to lock it, as the lock is held by | |
3699 | the parent process. There doesn't seem to be any way of doing | |
3700 | a dup-with-new-file-pointer. */ | |
3701 | ||
3702 | close(deliver_datafile); | |
3703 | sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, | |
3704 | message_id); | |
3705 | deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0); | |
3706 | ||
3707 | if (deliver_datafile < 0) | |
3708 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote " | |
3709 | "parallel delivery: %s", spoolname, strerror(errno)); | |
3710 | ||
3711 | /* Set the close-on-exec flag */ | |
3712 | ||
3713 | fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) | | |
3714 | FD_CLOEXEC); | |
3715 | ||
3716 | /* Set the uid/gid of this process; bombs out on failure. */ | |
3717 | ||
3718 | exim_setugid(uid, gid, use_initgroups, | |
3719 | string_sprintf("remote delivery to %s with transport=%s", | |
3720 | addr->address, tp->name)); | |
3721 | ||
3722 | /* Close the unwanted half of this process' pipe, set the process state, | |
3723 | and run the transport. Afterwards, transport_count will contain the number | |
3724 | of bytes written. */ | |
3725 | ||
3726 | close(pfd[pipe_read]); | |
3727 | set_process_info("delivering %s using %s", message_id, tp->name); | |
3728 | debug_print_string(tp->debug_string); | |
3729 | if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr); | |
3730 | ||
3731 | set_process_info("delivering %s (just run %s for %s%s in subprocess)", | |
3732 | message_id, tp->name, addr->address, (addr->next == NULL)? "" : ", ..."); | |
3733 | ||
3734 | /* Ensure any cached resources that we used are now released */ | |
3735 | ||
3736 | search_tidyup(); | |
3737 | ||
3738 | /* Pass the result back down the pipe. This is a lot more information | |
3739 | than is needed for a local delivery. We have to send back the error | |
3740 | status for each address, the usability status for each host that is | |
3741 | flagged as unusable, and all the retry items. When TLS is in use, we | |
3742 | send also the cipher and peerdn information. Each type of information | |
3743 | is flagged by an identifying byte, and is then in a fixed format (with | |
3744 | strings terminated by zeros), and there is a final terminator at the | |
3745 | end. The host information and retry information is all attached to | |
3746 | the first address, so that gets sent at the start. */ | |
3747 | ||
3748 | /* Host unusability information: for most success cases this will | |
3749 | be null. */ | |
3750 | ||
3751 | for (h = addr->host_list; h != NULL; h = h->next) | |
3752 | { | |
3753 | if (h->address == NULL || h->status < hstatus_unusable) continue; | |
3754 | sprintf(CS big_buffer, "H%c%c%s", h->status, h->why, h->address); | |
3755 | write(fd, big_buffer, Ustrlen(big_buffer+3) + 4); | |
3756 | } | |
3757 | ||
3758 | /* The number of bytes written. This is the same for each address. Even | |
3759 | if we sent several copies of the message down the same connection, the | |
3760 | size of each one is the same, and it's that value we have got because | |
3761 | transport_count gets reset before calling transport_write_message(). */ | |
3762 | ||
3763 | big_buffer[0] = 'S'; | |
3764 | memcpy(big_buffer+1, &transport_count, sizeof(transport_count)); | |
3765 | write(fd, big_buffer, sizeof(transport_count) + 1); | |
3766 | ||
3767 | /* Information about what happened to each address. Three item types are | |
3768 | used: an optional 'X' item first, for TLS information, followed by 'R' | |
3769 | items for any retry settings, and finally an 'A' item for the remaining | |
3770 | data. */ | |
3771 | ||
3772 | for(; addr != NULL; addr = addr->next) | |
3773 | { | |
3774 | uschar *ptr; | |
3775 | retry_item *r; | |
3776 | ||
3777 | /* The certificate verification status goes into the flags */ | |
3778 | ||
3779 | if (tls_certificate_verified) setflag(addr, af_cert_verified); | |
3780 | ||
3781 | /* Use an X item only if there's something to send */ | |
3782 | ||
3783 | #ifdef SUPPORT_TLS | |
3784 | if (addr->cipher != NULL) | |
3785 | { | |
3786 | ptr = big_buffer; | |
3787 | *ptr++ = 'X'; | |
3788 | sprintf(CS ptr, "%.128s", addr->cipher); | |
3789 | while(*ptr++); | |
3790 | if (addr->peerdn == NULL) *ptr++ = 0; else | |
3791 | { | |
3792 | sprintf(CS ptr, "%.512s", addr->peerdn); | |
3793 | while(*ptr++); | |
3794 | } | |
3795 | write(fd, big_buffer, ptr - big_buffer); | |
3796 | } | |
3797 | #endif | |
3798 | ||
3799 | /* Retry information: for most success cases this will be null. */ | |
3800 | ||
3801 | for (r = addr->retries; r != NULL; r = r->next) | |
3802 | { | |
3803 | uschar *ptr; | |
3804 | sprintf(CS big_buffer, "R%c%.500s", r->flags, r->key); | |
3805 | ptr = big_buffer + Ustrlen(big_buffer+2) + 3; | |
3806 | memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno)); | |
3807 | ptr += sizeof(r->basic_errno); | |
3808 | memcpy(ptr, &(r->more_errno), sizeof(r->more_errno)); | |
3809 | ptr += sizeof(r->more_errno); | |
3810 | if (r->message == NULL) *ptr++ = 0; else | |
3811 | { | |
3812 | sprintf(CS ptr, "%.512s", r->message); | |
3813 | while(*ptr++); | |
3814 | } | |
3815 | write(fd, big_buffer, ptr - big_buffer); | |
3816 | } | |
3817 | ||
3818 | /* The rest of the information goes in an 'A' item. */ | |
3819 | ||
3820 | ptr = big_buffer + 3; | |
3821 | sprintf(CS big_buffer, "A%c%c", addr->transport_return, | |
3822 | addr->special_action); | |
3823 | memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno)); | |
3824 | ptr += sizeof(addr->basic_errno); | |
3825 | memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno)); | |
3826 | ptr += sizeof(addr->more_errno); | |
3827 | memcpy(ptr, &(addr->flags), sizeof(addr->flags)); | |
3828 | ptr += sizeof(addr->flags); | |
3829 | ||
3830 | if (addr->message == NULL) *ptr++ = 0; else | |
3831 | { | |
3832 | sprintf(CS ptr, "%.1024s", addr->message); | |
3833 | while(*ptr++); | |
3834 | } | |
3835 | ||
3836 | if (addr->user_message == NULL) *ptr++ = 0; else | |
3837 | { | |
3838 | sprintf(CS ptr, "%.1024s", addr->user_message); | |
3839 | while(*ptr++); | |
3840 | } | |
3841 | ||
3842 | if (addr->host_used == NULL) *ptr++ = 0; else | |
3843 | { | |
3844 | sprintf(CS ptr, "%.256s", addr->host_used->name); | |
3845 | while(*ptr++); | |
3846 | sprintf(CS ptr, "%.64s", addr->host_used->address); | |
3847 | while(*ptr++); | |
3848 | memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port)); | |
3849 | ptr += sizeof(addr->host_used->port); | |
3850 | } | |
3851 | write(fd, big_buffer, ptr - big_buffer); | |
3852 | } | |
3853 | ||
3854 | /* Add termination flag, close the pipe, and that's it. The character | |
3855 | after 'Z' indicates whether continue_transport is now NULL or not. | |
3856 | A change from non-NULL to NULL indicates a problem with a continuing | |
3857 | connection. */ | |
3858 | ||
3859 | big_buffer[0] = 'Z'; | |
3860 | big_buffer[1] = (continue_transport == NULL)? '0' : '1'; | |
3861 | write(fd, big_buffer, 2); | |
3862 | close(fd); | |
3863 | exit(EXIT_SUCCESS); | |
3864 | } | |
3865 | ||
3866 | /* Back in the mainline: close the unwanted half of the pipe. */ | |
3867 | ||
3868 | close(pfd[pipe_write]); | |
3869 | ||
3870 | /* Fork failed; defer with error message */ | |
3871 | ||
3872 | if (pid < 0) | |
3873 | { | |
3874 | close(pfd[pipe_read]); | |
3875 | remote_post_process(addr, LOG_MAIN|LOG_PANIC, | |
3876 | string_sprintf("fork failed for remote delivery to %s: %s", | |
3877 | addr->domain, strerror(errno)), fallback); | |
3878 | continue; | |
3879 | } | |
3880 | ||
3881 | /* Fork succeeded; increment the count, and remember relevant data for | |
3882 | when the process finishes. */ | |
3883 | ||
3884 | parcount++; | |
3885 | parlist[poffset].addrlist = parlist[poffset].addr = addr; | |
3886 | parlist[poffset].pid = pid; | |
3887 | parlist[poffset].fd = pfd[pipe_read]; | |
3888 | parlist[poffset].done = FALSE; | |
3889 | parlist[poffset].msg = NULL; | |
3890 | parlist[poffset].return_path = return_path; | |
3891 | ||
3892 | /* If the process we've just started is sending a message down an existing | |
3893 | channel, wait for it now. This ensures that only one such process runs at | |
3894 | once, whatever the value of remote_max parallel. Otherwise, we might try to | |
3895 | send two or more messages simultaneously down the same channel. This could | |
3896 | happen if there are different domains that include the same host in otherwise | |
3897 | different host lists. | |
3898 | ||
3899 | Also, if the transport closes down the channel, this information gets back | |
3900 | (continue_transport gets set to NULL) before we consider any other addresses | |
3901 | in this message. */ | |
3902 | ||
3903 | if (continue_transport != NULL) par_reduce(0, fallback); | |
3904 | ||
3905 | /* Otherwise, if we are running in the test harness, wait a bit, to let the | |
3906 | newly created process get going before we create another process. This should | |
3907 | ensure repeatability in the tests. We only need to wait a tad. */ | |
3908 | ||
3909 | else if (running_in_test_harness) millisleep(500); | |
3910 | } | |
3911 | ||
3912 | /* Reached the end of the list of addresses. Wait for all the subprocesses that | |
3913 | are still running and post-process their addresses. */ | |
3914 | ||
3915 | par_reduce(0, fallback); | |
3916 | return TRUE; | |
3917 | } | |
3918 | ||
3919 | ||
3920 | ||
3921 | ||
3922 | /************************************************* | |
3923 | * Split an address into local part and domain * | |
3924 | *************************************************/ | |
3925 | ||
3926 | /* This function initializes an address for routing by splitting it up into a | |
3927 | local part and a domain. The local part is set up twice - once in its original | |
3928 | casing, and once in lower case, and it is dequoted. We also do the "percent | |
3929 | hack" for configured domains. This may lead to a DEFER result if a lookup | |
3930 | defers. When a percent-hacking takes place, we insert a copy of the original | |
3931 | address as a new parent of this address, as if we have had a redirection. | |
3932 | ||
3933 | Argument: | |
3934 | addr points to an addr_item block containing the address | |
3935 | ||
3936 | Returns: OK | |
3937 | DEFER - could not determine if domain is %-hackable | |
3938 | */ | |
3939 | ||
3940 | int | |
3941 | deliver_split_address(address_item *addr) | |
3942 | { | |
3943 | uschar *address = addr->address; | |
3944 | uschar *domain = Ustrrchr(address, '@'); | |
3945 | uschar *t; | |
3946 | int len = domain - address; | |
3947 | ||
3948 | addr->domain = string_copylc(domain+1); /* Domains are always caseless */ | |
3949 | ||
3950 | /* The implication in the RFCs (though I can't say I've seen it spelled out | |
3951 | explicitly) is that quoting should be removed from local parts at the point | |
3952 | where they are locally interpreted. [The new draft "821" is more explicit on | |
3953 | this, Jan 1999.] We know the syntax is valid, so this can be done by simply | |
3954 | removing quoting backslashes and any unquoted doublequotes. */ | |
3955 | ||
3956 | t = addr->cc_local_part = store_get(len+1); | |
3957 | while(len-- > 0) | |
3958 | { | |
3959 | register int c = *address++; | |
3960 | if (c == '\"') continue; | |
3961 | if (c == '\\') | |
3962 | { | |
3963 | *t++ = *address++; | |
3964 | len--; | |
3965 | } | |
3966 | else *t++ = c; | |
3967 | } | |
3968 | *t = 0; | |
3969 | ||
3970 | /* We do the percent hack only for those domains that are listed in | |
3971 | percent_hack_domains. A loop is required, to copy with multiple %-hacks. */ | |
3972 | ||
3973 | if (percent_hack_domains != NULL) | |
3974 | { | |
3975 | int rc; | |
3976 | uschar *new_address = NULL; | |
3977 | uschar *local_part = addr->cc_local_part; | |
3978 | ||
3979 | deliver_domain = addr->domain; /* set $domain */ | |
3980 | ||
3981 | while ((rc = match_isinlist(deliver_domain, &percent_hack_domains, 0, | |
3982 | &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL)) | |
3983 | == OK && | |
3984 | (t = Ustrrchr(local_part, '%')) != NULL) | |
3985 | { | |
3986 | new_address = string_copy(local_part); | |
3987 | new_address[t - local_part] = '@'; | |
3988 | deliver_domain = string_copylc(t+1); | |
3989 | local_part = string_copyn(local_part, t - local_part); | |
3990 | } | |
3991 | ||
3992 | if (rc == DEFER) return DEFER; /* lookup deferred */ | |
3993 | ||
3994 | /* If hackery happened, set up new parent and alter the current address. */ | |
3995 | ||
3996 | if (new_address != NULL) | |
3997 | { | |
3998 | address_item *new_parent = store_get(sizeof(address_item)); | |
3999 | *new_parent = *addr; | |
4000 | addr->parent = new_parent; | |
4001 | addr->address = new_address; | |
4002 | addr->unique = string_copy(new_address); | |
4003 | addr->domain = deliver_domain; | |
4004 | addr->cc_local_part = local_part; | |
4005 | DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n", | |
4006 | addr->address); | |
4007 | } | |
4008 | } | |
4009 | ||
4010 | /* Create the lowercased version of the final local part, and make that the | |
4011 | default one to be used. */ | |
4012 | ||
4013 | addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part); | |
4014 | return OK; | |
4015 | } | |
4016 | ||
4017 | ||
4018 | ||
4019 | ||
4020 | /************************************************* | |
4021 | * Get next error message text * | |
4022 | *************************************************/ | |
4023 | ||
4024 | /* If f is not NULL, read the next "paragraph", from a customized error message | |
4025 | text file, terminated by a line containing ****, and expand it. | |
4026 | ||
4027 | Arguments: | |
4028 | f NULL or a file to read from | |
4029 | which string indicating which string (for errors) | |
4030 | ||
4031 | Returns: NULL or an expanded string | |
4032 | */ | |
4033 | ||
4034 | static uschar * | |
4035 | next_emf(FILE *f, uschar *which) | |
4036 | { | |
4037 | int size = 256; | |
4038 | int ptr = 0; | |
4039 | uschar *para, *yield; | |
4040 | uschar buffer[256]; | |
4041 | ||
4042 | if (f == NULL) return NULL; | |
4043 | ||
4044 | if (Ufgets(buffer, sizeof(buffer), f) == NULL || | |
4045 | Ustrcmp(buffer, "****\n") == 0) return NULL; | |
4046 | ||
4047 | para = store_get(size); | |
4048 | for (;;) | |
4049 | { | |
4050 | para = string_cat(para, &size, &ptr, buffer, Ustrlen(buffer)); | |
4051 | if (Ufgets(buffer, sizeof(buffer), f) == NULL || | |
4052 | Ustrcmp(buffer, "****\n") == 0) break; | |
4053 | } | |
4054 | para[ptr] = 0; | |
4055 | ||
4056 | yield = expand_string(para); | |
4057 | if (yield != NULL) return yield; | |
4058 | ||
4059 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from " | |
4060 | "bounce_message_file or warn_message_file (%s): %s", which, | |
4061 | expand_string_message); | |
4062 | return NULL; | |
4063 | } | |
4064 | ||
4065 | ||
4066 | ||
4067 | ||
4068 | /************************************************* | |
4069 | * Close down a passed transport channel * | |
4070 | *************************************************/ | |
4071 | ||
4072 | /* This function is called when a passed transport channel cannot be used. | |
4073 | It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED | |
4074 | so that the function call can be the argument of a "return" statement. | |
4075 | ||
4076 | Arguments: None | |
4077 | Returns: DELIVER_NOT_ATTEMPTED | |
4078 | */ | |
4079 | ||
4080 | static int | |
4081 | continue_closedown(void) | |
4082 | { | |
4083 | if (continue_transport != NULL) | |
4084 | { | |
4085 | transport_instance *t; | |
4086 | for (t = transports; t != NULL; t = t->next) | |
4087 | { | |
4088 | if (Ustrcmp(t->name, continue_transport) == 0) | |
4089 | { | |
4090 | if (t->info->closedown != NULL) (t->info->closedown)(t); | |
4091 | break; | |
4092 | } | |
4093 | } | |
4094 | } | |
4095 | return DELIVER_NOT_ATTEMPTED; | |
4096 | } | |
4097 | ||
4098 | ||
4099 | ||
4100 | ||
4101 | /************************************************* | |
4102 | * Print address information * | |
4103 | *************************************************/ | |
4104 | ||
4105 | /* This function is called to output an address, or information about an | |
4106 | address, for bounce or defer messages. If the hide_child flag is set, all we | |
4107 | output is the original ancestor address. | |
4108 | ||
4109 | Arguments: | |
4110 | addr points to the address | |
4111 | f the FILE to print to | |
4112 | si an initial string | |
4113 | sc a continuation string for before "generated" | |
4114 | se an end string | |
4115 | ||
4116 | Returns: TRUE if the address is not hidden | |
4117 | */ | |
4118 | ||
4119 | static BOOL | |
4120 | print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc, | |
4121 | uschar *se) | |
4122 | { | |
4123 | BOOL yield = TRUE; | |
4124 | uschar *printed = US""; | |
4125 | address_item *ancestor = addr; | |
4126 | while (ancestor->parent != NULL) ancestor = ancestor->parent; | |
4127 | ||
4128 | fprintf(f, "%s", CS si); | |
4129 | ||
4130 | if (addr->parent != NULL && testflag(addr, af_hide_child)) | |
4131 | { | |
4132 | printed = US"an undisclosed address"; | |
4133 | yield = FALSE; | |
4134 | } | |
4135 | ||
4136 | else if (!testflag(addr, af_pfr) || addr->parent == NULL) | |
4137 | printed = addr->address; | |
4138 | ||
4139 | else | |
4140 | { | |
4141 | uschar *s = addr->address; | |
4142 | uschar *ss; | |
4143 | ||
4144 | if (addr->address[0] == '>') { ss = US"mail"; s++; } | |
4145 | else if (addr->address[0] == '|') ss = US"pipe"; | |
4146 | else ss = US"save"; | |
4147 | ||
4148 | fprintf(f, "%s to %s%sgenerated by ", ss, s, sc); | |
4149 | printed = addr->parent->address; | |
4150 | } | |
4151 | ||
4152 | fprintf(f, "%s", CS string_printing(printed)); | |
4153 | ||
4154 | if (ancestor != addr) | |
4155 | { | |
4156 | uschar *original = (ancestor->onetime_parent == NULL)? | |
4157 | ancestor->address : ancestor->onetime_parent; | |
4158 | if (strcmpic(original, printed) != 0) | |
4159 | fprintf(f, "%s(%sgenerated from %s)", sc, | |
4160 | (ancestor != addr->parent)? "ultimately " : "", | |
4161 | string_printing(original)); | |
4162 | } | |
4163 | ||
4164 | fprintf(f, "%s", CS se); | |
4165 | return yield; | |
4166 | } | |
4167 | ||
4168 | ||
4169 | ||
4170 | ||
4171 | ||
4172 | ||
4173 | /************************************************* | |
4174 | * Print error for an address * | |
4175 | *************************************************/ | |
4176 | ||
4177 | /* This function is called to print the error information out of an address for | |
4178 | a bounce or a warning message. It tries to format the message reasonably by | |
4179 | introducing newlines. All lines are indented by 4; the initial printing | |
4180 | position must be set before calling. | |
4181 | ||
4182 | Arguments: | |
4183 | addr points to the address | |
4184 | f the FILE to print on | |
4185 | ||
4186 | Returns: nothing | |
4187 | */ | |
4188 | ||
4189 | static void | |
4190 | print_address_error(address_item *addr, FILE *f) | |
4191 | { | |
4192 | uschar *s = (addr->user_message != NULL)? addr->user_message : addr->message; | |
4193 | if (addr->basic_errno > 0) | |
4194 | { | |
4195 | fprintf(f, "%s%s", strerror(addr->basic_errno), | |
4196 | (s == NULL)? "" : ":\n "); | |
4197 | } | |
4198 | if (s == NULL) | |
4199 | { | |
4200 | if (addr->basic_errno <= 0) fprintf(f, "unknown error"); | |
4201 | } | |
4202 | else | |
4203 | { | |
4204 | int count = 0; | |
4205 | while (*s != 0) | |
4206 | { | |
4207 | if (*s == '\\' && s[1] == 'n') | |
4208 | { | |
4209 | fprintf(f, "\n "); | |
4210 | s += 2; | |
4211 | count = 0; | |
4212 | } | |
4213 | else | |
4214 | { | |
4215 | fputc(*s, f); | |
4216 | count++; | |
4217 | if (*s++ == ':' && isspace(*s) && count > 45) | |
4218 | { | |
4219 | fprintf(f, "\n "); /* sic (because space follows) */ | |
4220 | count = 0; | |
4221 | } | |
4222 | } | |
4223 | } | |
4224 | } | |
4225 | } | |
4226 | ||
4227 | ||
4228 | ||
4229 | ||
4230 | /************************************************* | |
4231 | * Deliver one message * | |
4232 | *************************************************/ | |
4233 | ||
4234 | /* This is the function which is called when a message is to be delivered. It | |
4235 | is passed the id of the message. It is possible that the message no longer | |
4236 | exists, if some other process has delivered it, and it is also possible that | |
4237 | the message is being worked on by another process, in which case the data file | |
4238 | will be locked. | |
4239 | ||
4240 | If no delivery is attempted for any of the above reasons, the function returns | |
4241 | DELIVER_NOT_ATTEMPTED. | |
4242 | ||
4243 | If the give_up flag is set true, do not attempt any deliveries, but instead | |
4244 | fail all outstanding addresses and return the message to the sender (or | |
4245 | whoever). | |
4246 | ||
4247 | A delivery operation has a process all to itself; we never deliver more than | |
4248 | one message in the same process. Therefore we needn't worry too much about | |
4249 | store leakage. | |
4250 | ||
4251 | Arguments: | |
4252 | id the id of the message to be delivered | |
4253 | forced TRUE if delivery was forced by an administrator; this overrides | |
4254 | retry delays and causes a delivery to be tried regardless | |
4255 | give_up TRUE if an administrator has requested that delivery attempts | |
4256 | be abandoned | |
4257 | ||
4258 | Returns: When the global variable mua_wrapper is FALSE: | |
4259 | DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made | |
4260 | DELIVER_NOT_ATTEMPTED otherwise (see comment above) | |
4261 | When the global variable mua_wrapper is TRUE: | |
4262 | DELIVER_MUA_SUCCEEDED if delivery succeeded | |
4263 | DELIVER_MUA_FAILED if delivery failed | |
4264 | DELIVER_NOT_ATTEMPTED if not attempted (should not occur) | |
4265 | */ | |
4266 | ||
4267 | int | |
4268 | deliver_message(uschar *id, BOOL forced, BOOL give_up) | |
4269 | { | |
4270 | int i, rc; | |
4271 | int final_yield = DELIVER_ATTEMPTED_NORMAL; | |
4272 | time_t now = time(NULL); | |
4273 | address_item *addr_last = NULL; | |
4274 | uschar *filter_message = NULL; | |
4275 | FILE *jread; | |
4276 | int process_recipients = RECIP_ACCEPT; | |
4277 | open_db dbblock; | |
4278 | open_db *dbm_file; | |
4279 | ||
4280 | uschar *info = (queue_run_pid == (pid_t)0)? | |
4281 | string_sprintf("delivering %s", id) : | |
4282 | string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid); | |
4283 | ||
4284 | /* If the D_process_info bit is on, set_process_info() will output debugging | |
4285 | information. If not, we want to show this initial information if D_deliver or | |
4286 | D_queue_run is set or in verbose mode. */ | |
4287 | ||
4288 | set_process_info("%s", info); | |
4289 | ||
4290 | if ((debug_selector & D_process_info) == 0 && | |
4291 | (debug_selector & (D_deliver|D_queue_run|D_v)) != 0) | |
4292 | debug_printf("%s\n", info); | |
4293 | ||
4294 | /* Ensure that we catch any subprocesses that are created. Although Exim | |
4295 | sets SIG_DFL as its initial default, some routes through the code end up | |
4296 | here with it set to SIG_IGN - cases where a non-synchronous delivery process | |
4297 | has been forked, but no re-exec has been done. We use sigaction rather than | |
4298 | plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be | |
4299 | sure it is turned off. (There was a problem on AIX with this.) */ | |
4300 | ||
4301 | #ifdef SA_NOCLDWAIT | |
4302 | { | |
4303 | struct sigaction act; | |
4304 | act.sa_handler = SIG_DFL; | |
4305 | sigemptyset(&(act.sa_mask)); | |
4306 | act.sa_flags = 0; | |
4307 | sigaction(SIGCHLD, &act, NULL); | |
4308 | } | |
4309 | #else | |
4310 | signal(SIGCHLD, SIG_DFL); | |
4311 | #endif | |
4312 | ||
4313 | /* Make the forcing flag available for routers and transports, set up the | |
4314 | global message id field, and initialize the count for returned files and the | |
4315 | message size. This use of strcpy() is OK because the length id is checked when | |
4316 | it is obtained from a command line (the -M or -q options), and otherwise it is | |
4317 | known to be a valid message id. */ | |
4318 | ||
4319 | Ustrcpy(message_id, id); | |
4320 | deliver_force = forced; | |
4321 | return_count = 0; | |
4322 | message_size = 0; | |
4323 | ||
4324 | /* Initialize some flags */ | |
4325 | ||
4326 | update_spool = FALSE; | |
4327 | remove_journal = TRUE; | |
4328 | ||
4329 | /* Reset the random number generator, so that if several delivery processes are | |
4330 | started from a queue runner that has already used random numbers (for sorting), | |
4331 | they don't all get the same sequence. */ | |
4332 | ||
4333 | random_seed = 0; | |
4334 | ||
4335 | /* Open and lock the message's data file. Exim locks on this one because the | |
4336 | header file may get replaced as it is re-written during the delivery process. | |
4337 | Any failures cause messages to be written to the log, except for missing files | |
4338 | while queue running - another process probably completed delivery. As part of | |
4339 | opening the data file, message_subdir gets set. */ | |
4340 | ||
4341 | if (!spool_open_datafile(id)) | |
4342 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ | |
4343 | ||
4344 | /* The value of message_size at this point has been set to the data length, | |
4345 | plus one for the blank line that notionally precedes the data. */ | |
4346 | ||
4347 | /* Now read the contents of the header file, which will set up the headers in | |
4348 | store, and also the list of recipients and the tree of non-recipients and | |
4349 | assorted flags. It updates message_size. If there is a reading or format error, | |
4350 | give up; if the message has been around for sufficiently long, remove it. */ | |
4351 | ||
4352 | sprintf(CS spoolname, "%s-H", id); | |
4353 | if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK) | |
4354 | { | |
4355 | if (errno == ERRNO_SPOOLFORMAT) | |
4356 | { | |
4357 | struct stat statbuf; | |
4358 | sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir, | |
4359 | spoolname); | |
4360 | if (Ustat(big_buffer, &statbuf) == 0) | |
4361 | { | |
4362 | int size = statbuf.st_size; /* Because might be a long */ | |
4363 | log_write(0, LOG_MAIN, "Format error in spool file %s: size=%d", | |
4364 | spoolname, size); | |
4365 | } | |
4366 | else log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname); | |
4367 | } | |
4368 | else | |
4369 | log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname, | |
4370 | strerror(errno)); | |
4371 | ||
4372 | /* If we managed to read the envelope data, received_time contains the | |
4373 | time the message was received. Otherwise, we can calculate it from the | |
4374 | message id. */ | |
4375 | ||
4376 | if (rc != spool_read_hdrerror) | |
4377 | { | |
4378 | received_time = 0; | |
4379 | for (i = 0; i < 6; i++) | |
4380 | received_time = received_time * BASE_62 + tab62[id[i] - '0']; | |
4381 | } | |
4382 | ||
4383 | /* If we've had this malformed message too long, sling it. */ | |
4384 | ||
4385 | if (now - received_time > keep_malformed) | |
4386 | { | |
4387 | sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id); | |
4388 | Uunlink(spoolname); | |
4389 | sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id); | |
4390 | Uunlink(spoolname); | |
4391 | sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id); | |
4392 | Uunlink(spoolname); | |
4393 | sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id); | |
4394 | Uunlink(spoolname); | |
4395 | log_write(0, LOG_MAIN, "Message removed because older than %s", | |
4396 | readconf_printtime(keep_malformed)); | |
4397 | } | |
4398 | ||
4399 | close(deliver_datafile); | |
4400 | deliver_datafile = -1; | |
4401 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ | |
4402 | } | |
4403 | ||
4404 | /* The spool header file has been read. Look to see if there is an existing | |
4405 | journal file for this message. If there is, it means that a previous delivery | |
4406 | attempt crashed (program or host) before it could update the spool header file. | |
4407 | Read the list of delivered addresses from the journal and add them to the | |
4408 | nonrecipients tree. Then update the spool file. We can leave the journal in | |
4409 | existence, as it will get further successful deliveries added to it in this | |
4410 | run, and it will be deleted if this function gets to its end successfully. | |
4411 | Otherwise it might be needed again. */ | |
4412 | ||
4413 | sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id); | |
4414 | jread = Ufopen(spoolname, "rb"); | |
4415 | if (jread != NULL) | |
4416 | { | |
4417 | while (Ufgets(big_buffer, big_buffer_size, jread) != NULL) | |
4418 | { | |
4419 | int n = Ustrlen(big_buffer); | |
4420 | big_buffer[n-1] = 0; | |
4421 | tree_add_nonrecipient(big_buffer); | |
4422 | DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from " | |
4423 | "journal file\n", big_buffer); | |
4424 | } | |
4425 | fclose(jread); | |
4426 | /* Panic-dies on error */ | |
4427 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); | |
4428 | } | |
4429 | else if (errno != ENOENT) | |
4430 | { | |
4431 | log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: " | |
4432 | "%s", strerror(errno)); | |
4433 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ | |
4434 | } | |
4435 | ||
4436 | /* A null recipients list indicates some kind of disaster. */ | |
4437 | ||
4438 | if (recipients_list == NULL) | |
4439 | { | |
4440 | close(deliver_datafile); | |
4441 | deliver_datafile = -1; | |
4442 | log_write(0, LOG_MAIN, "Spool error: no recipients for %s", spoolname); | |
4443 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ | |
4444 | } | |
4445 | ||
4446 | ||
4447 | /* Handle a message that is frozen. There are a number of different things that | |
4448 | can happen, but in the default situation, unless forced, no delivery is | |
4449 | attempted. */ | |
4450 | ||
4451 | if (deliver_freeze) | |
4452 | { | |
4453 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES | |
4454 | /* Moving to another directory removes the message from Exim's view. Other | |
4455 | tools must be used to deal with it. Logging of this action happens in | |
4456 | spool_move_message() and its subfunctions. */ | |
4457 | ||
4458 | if (move_frozen_messages && | |
4459 | spool_move_message(id, message_subdir, US"", US"F")) | |
4460 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ | |
4461 | #endif | |
4462 | ||
4463 | /* For all frozen messages (bounces or not), timeout_frozen_after sets the | |
4464 | maximum time to keep messages that are frozen. Thaw if we reach it, with a | |
4465 | flag causing all recipients to be failed. The time is the age of the | |
4466 | message, not the time since freezing. */ | |
4467 | ||
4468 | if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after) | |
4469 | { | |
4470 | log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after"); | |
4471 | process_recipients = RECIP_FAIL_TIMEOUT; | |
4472 | } | |
4473 | ||
4474 | /* For bounce messages (and others with no sender), thaw if the error message | |
4475 | ignore timer is exceeded. The message will be discarded if this delivery | |
4476 | fails. */ | |
4477 | ||
4478 | else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after) | |
4479 | { | |
4480 | log_write(0, LOG_MAIN, "Unfrozen by errmsg timer"); | |
4481 | } | |
4482 | ||
4483 | /* If there's no auto thaw, or we haven't reached the auto thaw time yet, and | |
4484 | this delivery is not forced by an admin user, do not attempt delivery of this | |
4485 | message. Note that forced is set for continuing messages down the same | |
4486 | channel, in order to skip load checking and ignore hold domains, but we | |
4487 | don't want unfreezing in that case. */ | |
4488 | ||
4489 | else | |
4490 | { | |
4491 | if ((auto_thaw <= 0 || now <= deliver_frozen_at + auto_thaw) && | |
4492 | (!forced || !deliver_force_thaw || !admin_user || | |
4493 | continue_hostname != NULL)) | |
4494 | { | |
4495 | close(deliver_datafile); | |
4496 | deliver_datafile = -1; | |
4497 | log_write(L_skip_delivery, LOG_MAIN, "Message is frozen"); | |
4498 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ | |
4499 | } | |
4500 | ||
4501 | /* If delivery was forced (by an admin user), assume a manual thaw. | |
4502 | Otherwise it's an auto thaw. */ | |
4503 | ||
4504 | if (forced) | |
4505 | { | |
4506 | deliver_manual_thaw = TRUE; | |
4507 | log_write(0, LOG_MAIN, "Unfrozen by forced delivery"); | |
4508 | } | |
4509 | else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw"); | |
4510 | } | |
4511 | ||
4512 | /* We get here if any of the rules for unfreezing have triggered. */ | |
4513 | ||
4514 | deliver_freeze = FALSE; | |
4515 | update_spool = TRUE; | |
4516 | } | |
4517 | ||
4518 | ||
4519 | /* Open the message log file if we are using them. This records details of | |
4520 | deliveries, deferments, and failures for the benefit of the mail administrator. | |
4521 | The log is not used by exim itself to track the progress of a message; that is | |
4522 | done by rewriting the header spool file. */ | |
4523 | ||
4524 | if (message_logs) | |
4525 | { | |
4526 | uschar *error; | |
4527 | int fd; | |
4528 | ||
4529 | sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id); | |
4530 | fd = open_msglog_file(spoolname, SPOOL_MODE, &error); | |
4531 | ||
4532 | if (fd < 0) | |
4533 | { | |
4534 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error, | |
4535 | spoolname, strerror(errno)); | |
4536 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ | |
4537 | } | |
4538 | ||
4539 | /* Make a C stream out of it. */ | |
4540 | ||
4541 | message_log = fdopen(fd, "a"); | |
4542 | if (message_log == NULL) | |
4543 | { | |
4544 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s", | |
4545 | spoolname, strerror(errno)); | |
4546 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ | |
4547 | } | |
4548 | } | |
4549 | ||
4550 | ||
4551 | /* If asked to give up on a message, log who did it, and set the action for all | |
4552 | the addresses. */ | |
4553 | ||
4554 | if (give_up) | |
4555 | { | |
4556 | struct passwd *pw = getpwuid(real_uid); | |
4557 | log_write(0, LOG_MAIN, "cancelled by %s", (pw != NULL)? | |
4558 | US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid)); | |
4559 | process_recipients = RECIP_FAIL; | |
4560 | } | |
4561 | ||
4562 | /* Otherwise, if there are too many Received: headers, fail all recipients. */ | |
4563 | ||
4564 | else if (received_count > received_headers_max) | |
4565 | process_recipients = RECIP_FAIL_LOOP; | |
4566 | ||
4567 | /* Otherwise, if a system-wide, address-independent message filter is | |
4568 | specified, run it now, except in the case when we are failing all recipients as | |
4569 | a result of timeout_frozen_after. If the system filter yields "delivered", then | |
4570 | ignore the true recipients of the message. Failure of the filter file is | |
4571 | logged, and the delivery attempt fails. */ | |
4572 | ||
4573 | else if (system_filter != NULL && process_recipients != RECIP_FAIL_TIMEOUT) | |
4574 | { | |
4575 | int rc; | |
4576 | int filtertype; | |
4577 | ugid_block ugid; | |
4578 | redirect_block redirect; | |
4579 | ||
4580 | if (system_filter_uid_set) | |
4581 | { | |
4582 | ugid.uid = system_filter_uid; | |
4583 | ugid.gid = system_filter_gid; | |
4584 | ugid.uid_set = ugid.gid_set = TRUE; | |
4585 | } | |
4586 | else | |
4587 | { | |
4588 | ugid.uid_set = ugid.gid_set = FALSE; | |
4589 | } | |
4590 | ||
4591 | return_path = sender_address; | |
4592 | enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */ | |
4593 | system_filtering = TRUE; | |
4594 | ||
4595 | /* Any error in the filter file causes a delivery to be abandoned. */ | |
4596 | ||
4597 | redirect.string = system_filter; | |
4598 | redirect.isfile = TRUE; | |
4599 | redirect.check_owner = redirect.check_group = FALSE; | |
4600 | redirect.owners = NULL; | |
4601 | redirect.owngroups = NULL; | |
4602 | redirect.pw = NULL; | |
4603 | redirect.modemask = 0; | |
4604 | ||
4605 | DEBUG(D_deliver|D_filter) debug_printf("running system filter\n"); | |
4606 | ||
4607 | rc = rda_interpret( | |
4608 | &redirect, /* Where the data is */ | |
4609 | RDO_DEFER | /* Turn on all the enabling options */ | |
4610 | RDO_FAIL | /* Leave off all the disabling options */ | |
4611 | RDO_FILTER | | |
4612 | RDO_FREEZE | | |
4613 | RDO_REALLOG | | |
4614 | RDO_REWRITE, | |
4615 | NULL, /* No :include: restriction (not used in filter) */ | |
4616 | NULL, /* No sieve vacation directory (not sieve!) */ | |
4617 | &ugid, /* uid/gid data */ | |
4618 | &addr_new, /* Where to hang generated addresses */ | |
4619 | &filter_message, /* Where to put error message */ | |
4620 | NULL, /* Don't skip syntax errors */ | |
4621 | &filtertype, /* Will always be set to FILTER_EXIM for this call */ | |
4622 | US"system filter"); /* For error messages */ | |
4623 | ||
4624 | DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc); | |
4625 | ||
4626 | if (rc == FF_ERROR || rc == FF_NONEXIST) | |
4627 | { | |
4628 | close(deliver_datafile); | |
4629 | deliver_datafile = -1; | |
4630 | log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s", | |
4631 | string_printing(filter_message)); | |
4632 | return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */ | |
4633 | } | |
4634 | ||
4635 | /* Reset things. If the filter message is an empty string, which can happen | |
4636 | for a filter "fail" or "freeze" command with no text, reset it to NULL. */ | |
4637 | ||
4638 | system_filtering = FALSE; | |
4639 | enable_dollar_recipients = FALSE; | |
4640 | if (filter_message != NULL && filter_message[0] == 0) filter_message = NULL; | |
4641 | ||
4642 | /* Save the values of the system filter variables so that user filters | |
4643 | can use them. */ | |
4644 | ||
4645 | memcpy(filter_sn, filter_n, sizeof(filter_sn)); | |
4646 | ||
4647 | /* The filter can request that delivery of the original addresses be | |
4648 | deferred. */ | |
4649 | ||
4650 | if (rc == FF_DEFER) | |
4651 | { | |
4652 | process_recipients = RECIP_DEFER; | |
4653 | deliver_msglog("Delivery deferred by system filter\n"); | |
4654 | log_write(0, LOG_MAIN, "Delivery deferred by system filter"); | |
4655 | } | |
4656 | ||
4657 | /* The filter can request that a message be frozen, but this does not | |
4658 | take place if the message has been manually thawed. In that case, we must | |
4659 | unset "delivered", which is forced by the "freeze" command to make -bF | |
4660 | work properly. */ | |
4661 | ||
4662 | else if (rc == FF_FREEZE && !deliver_manual_thaw) | |
4663 | { | |
4664 | deliver_freeze = TRUE; | |
4665 | deliver_frozen_at = time(NULL); | |
4666 | process_recipients = RECIP_DEFER; | |
4667 | frozen_info = string_sprintf(" by the system filter%s%s", | |
4668 | (filter_message == NULL)? US"" : US": ", | |
4669 | (filter_message == NULL)? US"" : filter_message); | |
4670 | } | |
4671 | ||
4672 | /* The filter can request that a message be failed. The error message may be | |
4673 | quite long - it is sent back to the sender in the bounce - but we don't want | |
4674 | to fill up the log with repetitions of it. If it starts with << then the text | |
4675 | between << and >> is written to the log, with the rest left for the bounce | |
4676 | message. */ | |
4677 | ||
4678 | else if (rc == FF_FAIL) | |
4679 | { | |
4680 | uschar *colon = US""; | |
4681 | uschar *logmsg = US""; | |
4682 | int loglen = 0; | |
4683 | ||
4684 | process_recipients = RECIP_FAIL_FILTER; | |
4685 | ||
4686 | if (filter_message != NULL) | |
4687 | { | |
4688 | uschar *logend; | |
4689 | colon = US": "; | |
4690 | if (filter_message[0] == '<' && filter_message[1] == '<' && | |
4691 | (logend = Ustrstr(filter_message, ">>")) != NULL) | |
4692 | { | |
4693 | logmsg = filter_message + 2; | |
4694 | loglen = logend - logmsg; | |
4695 | filter_message = logend + 2; | |
4696 | if (filter_message[0] == 0) filter_message = NULL; | |
4697 | } | |
4698 | else | |
4699 | { | |
4700 | logmsg = filter_message; | |
4701 | loglen = Ustrlen(filter_message); | |
4702 | } | |
4703 | } | |
4704 | ||
4705 | log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen, | |
4706 | logmsg); | |
4707 | } | |
4708 | ||
4709 | /* Delivery can be restricted only to those recipients (if any) that the | |
4710 | filter specified. */ | |
4711 | ||
4712 | else if (rc == FF_DELIVERED) | |
4713 | { | |
4714 | process_recipients = RECIP_IGNORE; | |
4715 | if (addr_new == NULL) | |
4716 | log_write(0, LOG_MAIN, "=> discarded (system filter)"); | |
4717 | else | |
4718 | log_write(0, LOG_MAIN, "original recipients ignored (system filter)"); | |
4719 | } | |
4720 | ||
4721 | /* If any new addresses were created by the filter, fake up a "parent" | |
4722 | for them. This is necessary for pipes, etc., which are expected to have | |
4723 | parents, and it also gives some sensible logging for others. Allow | |
4724 | pipes, files, and autoreplies, and run them as the filter uid if set, | |
4725 | otherwise as the current uid. */ | |
4726 | ||
4727 | if (addr_new != NULL) | |
4728 | { | |
4729 | int uid = (system_filter_uid_set)? system_filter_uid : geteuid(); | |
4730 | int gid = (system_filter_gid_set)? system_filter_gid : getegid(); | |
4731 | ||
4732 | /* The text "system-filter" is tested in transport_set_up_command() and in | |
4733 | set_up_shell_command() in the pipe transport, to enable them to permit | |
4734 | $recipients, so don't change it here without also changing it there. */ | |
4735 | ||
4736 | address_item *p = addr_new; | |
4737 | address_item *parent = deliver_make_addr(US"system-filter", FALSE); | |
4738 | ||
4739 | parent->domain = string_copylc(qualify_domain_recipient); | |
4740 | parent->local_part = US"system-filter"; | |
4741 | ||
4742 | /* As part of this loop, we arrange for addr_last to end up pointing | |
4743 | at the final address. This is used if we go on to add addresses for the | |
4744 | original recipients. */ | |
4745 | ||
4746 | while (p != NULL) | |
4747 | { | |
4748 | parent->child_count++; | |
4749 | p->parent = parent; | |
4750 | ||
4751 | if (testflag(p, af_pfr)) | |
4752 | { | |
4753 | uschar *tpname; | |
4754 | uschar *type; | |
4755 | p->uid = uid; | |
4756 | p->gid = gid; | |
4757 | setflag(p, af_uid_set | | |
4758 | af_gid_set | | |
4759 | af_allow_file | | |
4760 | af_allow_pipe | | |
4761 | af_allow_reply); | |
4762 | ||
4763 | /* Find the name of the system filter's appropriate pfr transport */ | |
4764 | ||
4765 | if (p->address[0] == '|') | |
4766 | { | |
4767 | type = US"pipe"; | |
4768 | tpname = system_filter_pipe_transport; | |
4769 | address_pipe = p->address; | |
4770 | } | |
4771 | else if (p->address[0] == '>') | |
4772 | { | |
4773 | type = US"reply"; | |
4774 | tpname = system_filter_reply_transport; | |
4775 | } | |
4776 | else | |
4777 | { | |
4778 | if (p->address[Ustrlen(p->address)-1] == '/') | |
4779 | { | |
4780 | type = US"directory"; | |
4781 | tpname = system_filter_directory_transport; | |
4782 | } | |
4783 | else | |
4784 | { | |
4785 | type = US"file"; | |
4786 | tpname = system_filter_file_transport; | |
4787 | } | |
4788 | address_file = p->address; | |
4789 | } | |
4790 | ||
4791 | /* Now find the actual transport, first expanding the name. We have | |
4792 | set address_file or address_pipe above. */ | |
4793 | ||
4794 | if (tpname != NULL) | |
4795 | { | |
4796 | uschar *tmp = expand_string(tpname); | |
4797 | address_file = address_pipe = NULL; | |
4798 | if (tmp == NULL) | |
4799 | p->message = string_sprintf("failed to expand \"%s\" as a " | |
4800 | "system filter transport name", tpname); | |
4801 | tpname = tmp; | |
4802 | } | |
4803 | else | |
4804 | { | |
4805 | p->message = string_sprintf("system_filter_%s_transport is unset", | |
4806 | type); | |
4807 | } | |
4808 | ||
4809 | if (tpname != NULL) | |
4810 | { | |
4811 | transport_instance *tp; | |
4812 | for (tp = transports; tp != NULL; tp = tp->next) | |
4813 | { | |
4814 | if (Ustrcmp(tp->name, tpname) == 0) | |
4815 | { | |
4816 | p->transport = tp; | |
4817 | break; | |
4818 | } | |
4819 | } | |
4820 | if (tp == NULL) | |
4821 | p->message = string_sprintf("failed to find \"%s\" transport " | |
4822 | "for system filter delivery", tpname); | |
4823 | } | |
4824 | ||
4825 | /* If we couldn't set up a transport, defer the delivery, putting the | |
4826 | error on the panic log as well as the main log. */ | |
4827 | ||
4828 | if (p->transport == NULL) | |
4829 | { | |
4830 | address_item *badp = p; | |
4831 | p = p->next; | |
4832 | if (addr_last == NULL) addr_new = p; else addr_last->next = p; | |
4833 | badp->local_part = badp->address; /* Needed for log line */ | |
4834 | post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0); | |
4835 | continue; | |
4836 | } | |
4837 | } /* End of pfr handling */ | |
4838 | ||
4839 | /* Either a non-pfr delivery, or we found a transport */ | |
4840 | ||
4841 | DEBUG(D_deliver|D_filter) | |
4842 | debug_printf("system filter added %s\n", p->address); | |
4843 | ||
4844 | addr_last = p; | |
4845 | p = p->next; | |
4846 | } /* Loop through all addr_new addresses */ | |
4847 | } | |
4848 | } | |
4849 | ||
4850 | ||
4851 | /* Scan the recipients list, and for every one that is not in the non- | |
4852 | recipients tree, add an addr item to the chain of new addresses. If the pno | |
4853 | value is non-negative, we must set the onetime parent from it. This which | |
4854 | points to the relevant entry in the recipients list. | |
4855 | ||
4856 | This processing can be altered by the setting of the process_recipients | |
4857 | variable, which is changed if recipients are to be ignored, failed, or | |
4858 | deferred. This can happen as a result of system filter activity, or if the -Mg | |
4859 | option is used to fail all of them. | |
4860 | ||
4861 | Duplicate addresses are handled later by a different tree structure; we can't | |
4862 | just extend the non-recipients tree, because that will be re-written to the | |
4863 | spool if the message is deferred, and in any case there are casing | |
4864 | complications for local addresses. */ | |
4865 | ||
4866 | if (process_recipients != RECIP_IGNORE) | |
4867 | { | |
4868 | for (i = 0; i < recipients_count; i++) | |
4869 | { | |
4870 | if (tree_search(tree_nonrecipients, recipients_list[i].address) == NULL) | |
4871 | { | |
4872 | recipient_item *r = recipients_list + i; | |
4873 | address_item *new = deliver_make_addr(r->address, FALSE); | |
4874 | new->p.errors_address = r->errors_to; | |
4875 | ||
4876 | if (r->pno >= 0) | |
4877 | new->onetime_parent = recipients_list[r->pno].address; | |
4878 | ||
4879 | switch (process_recipients) | |
4880 | { | |
4881 | /* RECIP_DEFER is set when a system filter freezes a message. */ | |
4882 | ||
4883 | case RECIP_DEFER: | |
4884 | new->next = addr_defer; | |
4885 | addr_defer = new; | |
4886 | break; | |
4887 | ||
4888 | ||
4889 | /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail" | |
4890 | command. */ | |
4891 | ||
4892 | case RECIP_FAIL_FILTER: | |
4893 | new->message = | |
4894 | (filter_message == NULL)? US"delivery cancelled" : filter_message; | |
4895 | goto RECIP_QUEUE_FAILED; /* below */ | |
4896 | ||
4897 | ||
4898 | /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older | |
4899 | than the value in timeout_frozen_after. Treat non-bounce messages | |
4900 | similarly to -Mg; for bounce messages we just want to discard, so | |
4901 | don't put the address on the failed list. The timeout has already | |
4902 | been logged. */ | |
4903 | ||
4904 | case RECIP_FAIL_TIMEOUT: | |
4905 | new->message = US"delivery cancelled; message timed out"; | |
4906 | goto RECIP_QUEUE_FAILED; /* below */ | |
4907 | ||
4908 | ||
4909 | /* RECIP_FAIL is set when -Mg has been used. */ | |
4910 | ||
4911 | case RECIP_FAIL: | |
4912 | new->message = US"delivery cancelled by administrator"; | |
4913 | /* Fall through */ | |
4914 | ||
4915 | /* Common code for the failure cases above. If this is not a bounce | |
4916 | message, put the address on the failed list so that it is used to | |
4917 | create a bounce. Otherwise do nothing - this just discards the address. | |
4918 | The incident has already been logged. */ | |
4919 | ||
4920 | RECIP_QUEUE_FAILED: | |
4921 | if (sender_address[0] != 0) | |
4922 | { | |
4923 | new->next = addr_failed; | |
4924 | addr_failed = new; | |
4925 | } | |
4926 | break; | |
4927 | ||
4928 | ||
4929 | /* RECIP_FAIL_LOOP is set when there are too many Received: headers | |
4930 | in the message. Process each address as a routing failure; if this | |
4931 | is a bounce message, it will get frozen. */ | |
4932 | ||
4933 | case RECIP_FAIL_LOOP: | |
4934 | new->message = US"Too many \"Received\" headers - suspected mail loop"; | |
4935 | post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0); | |
4936 | break; | |
4937 | ||
4938 | ||
4939 | /* Value should be RECIP_ACCEPT; take this as the safe default. */ | |
4940 | ||
4941 | default: | |
4942 | if (addr_new == NULL) addr_new = new; else addr_last->next = new; | |
4943 | addr_last = new; | |
4944 | break; | |
4945 | } | |
4946 | } | |
4947 | } | |
4948 | } | |
4949 | ||
4950 | DEBUG(D_deliver) | |
4951 | { | |
4952 | address_item *p = addr_new; | |
4953 | debug_printf("Delivery address list:\n"); | |
4954 | while (p != NULL) | |
4955 | { | |
4956 | debug_printf(" %s %s\n", p->address, (p->onetime_parent == NULL)? US"" : | |
4957 | p->onetime_parent); | |
4958 | p = p->next; | |
4959 | } | |
4960 | } | |
4961 | ||
4962 | /* Set up the buffers used for copying over the file when delivering. */ | |
4963 | ||
4964 | deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE); | |
4965 | deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE); | |
4966 | ||
4967 | ||
4968 | ||
4969 | /* Until there are no more new addresses, handle each one as follows: | |
4970 | ||
4971 | . If this is a generated address (indicated by the presence of a parent | |
4972 | pointer) then check to see whether it is a pipe, file, or autoreply, and | |
4973 | if so, handle it directly here. The router that produced the address will | |
4974 | have set the allow flags into the address, and also set the uid/gid required. | |
4975 | Having the routers generate new addresses and then checking them here at | |
4976 | the outer level is tidier than making each router do the checking, and | |
4977 | means that routers don't need access to the failed address queue. | |
4978 | ||
4979 | . Break up the address into local part and domain, and make lowercased | |
4980 | versions of these strings. We also make unquoted versions of the local part. | |
4981 | ||
4982 | . Handle the percent hack for those domains for which it is valid. | |
4983 | ||
4984 | . For child addresses, determine if any of the parents have the same address. | |
4985 | If so, generate a different string for previous delivery checking. Without | |
4986 | this code, if the address spqr generates spqr via a forward or alias file, | |
4987 | delivery of the generated spqr stops further attempts at the top level spqr, | |
4988 | which is not what is wanted - it may have generated other addresses. | |
4989 | ||
4990 | . Check on the retry database to see if routing was previously deferred, but | |
4991 | only if in a queue run. Addresses that are to be routed are put on the | |
4992 | addr_route chain. Addresses that are to be deferred are put on the | |
4993 | addr_defer chain. We do all the checking first, so as not to keep the | |
4994 | retry database open any longer than necessary. | |
4995 | ||
4996 | . Now we run the addresses through the routers. A router may put the address | |
4997 | on either the addr_local or the addr_remote chain for local or remote | |
4998 | delivery, respectively, or put it on the addr_failed chain if it is | |
4999 | undeliveable, or it may generate child addresses and put them on the | |
5000 | addr_new chain, or it may defer an address. All the chain anchors are | |
5001 | passed as arguments so that the routers can be called for verification | |
5002 | purposes as well. | |
5003 | ||
5004 | . If new addresses have been generated by the routers, da capo. | |
5005 | */ | |
5006 | ||
5007 | header_rewritten = FALSE; /* No headers rewritten yet */ | |
5008 | while (addr_new != NULL) /* Loop until all addresses dealt with */ | |
5009 | { | |
5010 | address_item *addr, *parent; | |
5011 | dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE); | |
5012 | ||
5013 | /* Failure to open the retry database is treated the same as if it does | |
5014 | not exist. In both cases, dbm_file is NULL. */ | |
5015 | ||
5016 | if (dbm_file == NULL) | |
5017 | { | |
5018 | DEBUG(D_deliver|D_retry|D_route|D_hints_lookup) | |
5019 | debug_printf("no retry data available\n"); | |
5020 | } | |
5021 | ||
5022 | /* Scan the current batch of new addresses, to handle pipes, files and | |
5023 | autoreplies, and determine which others are ready for routing. */ | |
5024 | ||
5025 | while (addr_new != NULL) | |
5026 | { | |
5027 | int rc; | |
5028 | uschar *p; | |
5029 | tree_node *tnode; | |
5030 | dbdata_retry *domain_retry_record; | |
5031 | dbdata_retry *address_retry_record; | |
5032 | ||
5033 | addr = addr_new; | |
5034 | addr_new = addr->next; | |
5035 | ||
5036 | DEBUG(D_deliver|D_retry|D_route) | |
5037 | { | |
5038 | debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); | |
5039 | debug_printf("Considering: %s\n", addr->address); | |
5040 | } | |
5041 | ||
5042 | /* Handle generated address that is a pipe or a file or an autoreply. */ | |
5043 | ||
5044 | if (testflag(addr, af_pfr)) | |
5045 | { | |
5046 | int offset = testflag(addr->parent, af_homonym)? 3:0; | |
5047 | ||
5048 | /* If two different users specify delivery to the same pipe or file or | |
5049 | autoreply, there should be two different deliveries, so build a unique | |
5050 | string that incorporates the original address, and use this for | |
5051 | duplicate testing and recording delivery, and also for retrying. */ | |
5052 | ||
5053 | addr->unique = | |
5054 | string_sprintf("%s:%s", addr->address, addr->parent->unique + offset); | |
5055 | ||
5056 | addr->address_retry_key = addr->domain_retry_key = | |
5057 | string_sprintf("T:%s", addr->unique); | |
5058 | ||
5059 | /* If a filter file specifies two deliveries to the same pipe or file, | |
5060 | we want to de-duplicate, but this is probably not wanted for two mail | |
5061 | commands to the same address, where probably both should be delivered. | |
5062 | So, we have to invent a different unique string in that case. Just | |
5063 | keep piling '>' characters on the front. */ | |
5064 | ||
5065 | if (addr->address[0] == '>') | |
5066 | { | |
5067 | while (tree_search(tree_duplicates, addr->unique) != NULL) | |
5068 | addr->unique = string_sprintf(">%s", addr->unique); | |
5069 | } | |
5070 | ||
5071 | else if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL) | |
5072 | { | |
5073 | DEBUG(D_deliver|D_route) | |
5074 | debug_printf("%s is a duplicate address: discarded\n", addr->address); | |
5075 | addr->dupof = tnode->data.ptr; | |
5076 | addr->next = addr_duplicate; | |
5077 | addr_duplicate = addr; | |
5078 | continue; | |
5079 | } | |
5080 | ||
5081 | DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique); | |
5082 | ||
5083 | /* Check for previous delivery */ | |
5084 | ||
5085 | if (tree_search(tree_nonrecipients, addr->unique) != NULL) | |
5086 | { | |
5087 | DEBUG(D_deliver|D_route) | |
5088 | debug_printf("%s was previously delivered: discarded\n", addr->address); | |
5089 | child_done(addr, tod_stamp(tod_log)); | |
5090 | continue; | |
5091 | } | |
5092 | ||
5093 | /* Save for checking future duplicates */ | |
5094 | ||
5095 | tree_add_duplicate(addr->unique, addr); | |
5096 | ||
5097 | /* Set local part and domain */ | |
5098 | ||
5099 | addr->local_part = addr->address; | |
5100 | addr->domain = addr->parent->domain; | |
5101 | ||
5102 | /* Ensure that the delivery is permitted. */ | |
5103 | ||
5104 | if (testflag(addr, af_file)) | |
5105 | { | |
5106 | if (!testflag(addr, af_allow_file)) | |
5107 | { | |
5108 | addr->basic_errno = ERRNO_FORBIDFILE; | |
5109 | addr->message = US"delivery to file forbidden"; | |
5110 | (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0); | |
5111 | continue; /* with the next new address */ | |
5112 | } | |
5113 | } | |
5114 | else if (addr->address[0] == '|') | |
5115 | { | |
5116 | if (!testflag(addr, af_allow_pipe)) | |
5117 | { | |
5118 | addr->basic_errno = ERRNO_FORBIDPIPE; | |
5119 | addr->message = US"delivery to pipe forbidden"; | |
5120 | (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0); | |
5121 | continue; /* with the next new address */ | |
5122 | } | |
5123 | } | |
5124 | else if (!testflag(addr, af_allow_reply)) | |
5125 | { | |
5126 | addr->basic_errno = ERRNO_FORBIDREPLY; | |
5127 | addr->message = US"autoreply forbidden"; | |
5128 | (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0); | |
5129 | continue; /* with the next new address */ | |
5130 | } | |
5131 | ||
5132 | /* If the errno field is already set to BADTRANSPORT, it indicates | |
5133 | failure to expand a transport string, or find the associated transport, | |
5134 | or an unset transport when one is required. Leave this test till now so | |
5135 | that the forbid errors are given in preference. */ | |
5136 | ||
5137 | if (addr->basic_errno == ERRNO_BADTRANSPORT) | |
5138 | { | |
5139 | (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0); | |
5140 | continue; | |
5141 | } | |
5142 | ||
5143 | /* Treat /dev/null as a special case and abandon the delivery. This | |
5144 | avoids having to specify a uid on the transport just for this case. | |
5145 | Arrange for the transport name to be logged as "**bypassed**". */ | |
5146 | ||
5147 | if (Ustrcmp(addr->address, "/dev/null") == 0) | |
5148 | { | |
5149 | uschar *save = addr->transport->name; | |
5150 | addr->transport->name = US"**bypassed**"; | |
5151 | (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '='); | |
5152 | addr->transport->name = save; | |
5153 | continue; /* with the next new address */ | |
5154 | } | |
5155 | ||
5156 | /* Pipe, file, or autoreply delivery is to go ahead as a normal local | |
5157 | delivery. */ | |
5158 | ||
5159 | DEBUG(D_deliver|D_route) | |
5160 | debug_printf("queued for %s transport\n", addr->transport->name); | |
5161 | addr->next = addr_local; | |
5162 | addr_local = addr; | |
5163 | continue; /* with the next new address */ | |
5164 | } | |
5165 | ||
5166 | /* Handle normal addresses. First, split up into local part and domain, | |
5167 | handling the %-hack if necessary. There is the possibility of a defer from | |
5168 | a lookup in percent_hack_domains. */ | |
5169 | ||
5170 | if ((rc = deliver_split_address(addr)) == DEFER) | |
5171 | { | |
5172 | addr->message = US"cannot check percent_hack_domains"; | |
5173 | addr->basic_errno = ERRNO_LISTDEFER; | |
5174 | (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0); | |
5175 | continue; | |
5176 | } | |
5177 | ||
5178 | /* Check to see if the domain is held. If so, proceed only if the | |
5179 | delivery was forced by hand. */ | |
5180 | ||
5181 | deliver_domain = addr->domain; /* set $domain */ | |
5182 | if (!forced && hold_domains != NULL && | |
5183 | (rc = match_isinlist(addr->domain, &hold_domains, 0, | |
5184 | &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, | |
5185 | NULL)) != FAIL) | |
5186 | { | |
5187 | if (rc == DEFER) | |
5188 | { | |
5189 | addr->message = US"hold_domains lookup deferred"; | |
5190 | addr->basic_errno = ERRNO_LISTDEFER; | |
5191 | } | |
5192 | else | |
5193 | { | |
5194 | addr->message = US"domain is held"; | |
5195 | addr->basic_errno = ERRNO_HELD; | |
5196 | } | |
5197 | (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0); | |
5198 | continue; | |
5199 | } | |
5200 | ||
5201 | /* Now we can check for duplicates and previously delivered addresses. In | |
5202 | order to do this, we have to generate a "unique" value for each address, | |
5203 | because there may be identical actual addresses in a line of descendents. | |
5204 | The "unique" field is initialized to the same value as the "address" field, | |
5205 | but gets changed here to cope with identically-named descendents. */ | |
5206 | ||
5207 | for (parent = addr->parent; parent != NULL; parent = parent->parent) | |
5208 | if (strcmpic(addr->address, parent->address) == 0) break; | |
5209 | ||
5210 | /* If there's an ancestor with the same name, set the homonym flag. This | |
5211 | influences how deliveries are recorded. Then add a prefix on the front of | |
5212 | the unique address. We use \n\ where n starts at 0 and increases each time. | |
5213 | It is unlikely to pass 9, but if it does, it may look odd but will still | |
5214 | work. This means that siblings or cousins with the same names are treated | |
5215 | as duplicates, which is what we want. */ | |
5216 | ||
5217 | if (parent != NULL) | |
5218 | { | |
5219 | setflag(addr, af_homonym); | |
5220 | if (parent->unique[0] != '\\') | |
5221 | addr->unique = string_sprintf("\\0\\%s", addr->address); | |
5222 | else | |
5223 | addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1, | |
5224 | addr->address); | |
5225 | } | |
5226 | ||
5227 | /* Ensure that the domain in the unique field is lower cased, because | |
5228 | domains are always handled caselessly. */ | |
5229 | ||
5230 | p = Ustrrchr(addr->unique, '@'); | |
5231 | while (*p != 0) { *p = tolower(*p); p++; } | |
5232 | ||
5233 | DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique); | |
5234 | ||
5235 | if (tree_search(tree_nonrecipients, addr->unique) != NULL) | |
5236 | { | |
5237 | DEBUG(D_deliver|D_route) | |
5238 | debug_printf("%s was previously delivered: discarded\n", addr->unique); | |
5239 | child_done(addr, tod_stamp(tod_log)); | |
5240 | continue; | |
5241 | } | |
5242 | ||
5243 | /* If it's a duplicate, remember what it's a duplicate of */ | |
5244 | ||
5245 | if ((tnode = tree_search(tree_duplicates, addr->unique)) != NULL) | |
5246 | { | |
5247 | DEBUG(D_deliver|D_route) | |
5248 | debug_printf("%s is a duplicate address: discarded\n", addr->unique); | |
5249 | addr->dupof = tnode->data.ptr; | |
5250 | addr->next = addr_duplicate; | |
5251 | addr_duplicate = addr; | |
5252 | continue; | |
5253 | } | |
5254 | ||
5255 | /* Record this address, so subsequent duplicates get picked up. */ | |
5256 | ||
5257 | tree_add_duplicate(addr->unique, addr); | |
5258 | ||
5259 | /* Get the routing retry status, saving the two retry keys (with and | |
5260 | without the local part) for subsequent use. Ignore retry records that | |
5261 | are too old. */ | |
5262 | ||
5263 | addr->domain_retry_key = string_sprintf("R:%s", addr->domain); | |
5264 | addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part, | |
5265 | addr->domain); | |
5266 | ||
5267 | if (dbm_file == NULL) | |
5268 | domain_retry_record = address_retry_record = NULL; | |
5269 | else | |
5270 | { | |
5271 | domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key); | |
5272 | if (domain_retry_record != NULL && | |
5273 | now - domain_retry_record->time_stamp > retry_data_expire) | |
5274 | domain_retry_record = NULL; | |
5275 | ||
5276 | address_retry_record = dbfn_read(dbm_file, addr->address_retry_key); | |
5277 | if (address_retry_record != NULL && | |
5278 | now - address_retry_record->time_stamp > retry_data_expire) | |
5279 | address_retry_record = NULL; | |
5280 | } | |
5281 | ||
5282 | DEBUG(D_deliver|D_retry) | |
5283 | { | |
5284 | if (domain_retry_record == NULL) | |
5285 | debug_printf("no domain retry record\n"); | |
5286 | if (address_retry_record == NULL) | |
5287 | debug_printf("no address retry record\n"); | |
5288 | } | |
5289 | ||
5290 | /* If we are sending a message down an existing SMTP connection, we must | |
5291 | assume that the message which created the connection managed to route | |
5292 | an address to that connection. We do not want to run the risk of taking | |
5293 | a long time over routing here, because if we do, the server at the other | |
5294 | end of the connection may time it out. This is especially true for messages | |
5295 | with lots of addresses. For this kind of delivery, queue_running is not | |
5296 | set, so we would normally route all addresses. We take a pragmatic approach | |
5297 | and defer routing any addresses that have any kind of domain retry record. | |
5298 | That is, we don't even look at their retry times. It doesn't matter if this | |
5299 | doesn't work occasionally. This is all just an optimization, after all. | |
5300 | ||
5301 | The reason for not doing the same for address retries is that they normally | |
5302 | arise from 4xx responses, not DNS timeouts. */ | |
5303 | ||
5304 | if (continue_hostname != NULL && domain_retry_record != NULL) | |
5305 | { | |
5306 | addr->message = US"reusing SMTP connection skips previous routing defer"; | |
5307 | addr->basic_errno = ERRNO_RRETRY; | |
5308 | (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0); | |
5309 | } | |
5310 | ||
5311 | /* If queue_running, defer routing unless no retry data or we've | |
5312 | passed the next retry time, or this message is forced. However, | |
5313 | if the retry time has expired, allow the routing attempt. | |
5314 | If it fails again, the address will be failed. This ensures that | |
5315 | each address is routed at least once, even after long-term routing | |
5316 | failures. | |
5317 | ||
5318 | If there is an address retry, check that too; just wait for the next | |
5319 | retry time. This helps with the case when the temporary error on the | |
5320 | address was really message-specific rather than address specific, since | |
5321 | it allows other messages through. */ | |
5322 | ||
5323 | else if (!deliver_force && queue_running && | |
5324 | ((domain_retry_record != NULL && | |
5325 | now < domain_retry_record->next_try && | |
5326 | !domain_retry_record->expired) | |
5327 | || | |
5328 | (address_retry_record != NULL && | |
5329 | now < address_retry_record->next_try)) | |
5330 | ) | |
5331 | { | |
5332 | addr->message = US"retry time not reached"; | |
5333 | addr->basic_errno = ERRNO_RRETRY; | |
5334 | (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0); | |
5335 | } | |
5336 | ||
5337 | /* The domain is OK for routing. Remember if retry data exists so it | |
5338 | can be cleaned up after a successful delivery. */ | |
5339 | ||
5340 | else | |
5341 | { | |
5342 | if (domain_retry_record != NULL || address_retry_record != NULL) | |
5343 | setflag(addr, af_dr_retry_exists); | |
5344 | addr->next = addr_route; | |
5345 | addr_route = addr; | |
5346 | DEBUG(D_deliver|D_route) | |
5347 | debug_printf("%s: queued for routing\n", addr->address); | |
5348 | } | |
5349 | } | |
5350 | ||
5351 | /* The database is closed while routing is actually happening. Requests to | |
5352 | update it are put on a chain and all processed together at the end. */ | |
5353 | ||
5354 | if (dbm_file != NULL) dbfn_close(dbm_file); | |
5355 | ||
5356 | /* If queue_domains is set, we don't even want to try routing addresses in | |
5357 | those domains. During queue runs, queue_domains is forced to be unset. | |
5358 | Optimize by skipping this pass through the addresses if nothing is set. */ | |
5359 | ||
5360 | if (!deliver_force && queue_domains != NULL) | |
5361 | { | |
5362 | address_item *okaddr = NULL; | |
5363 | while (addr_route != NULL) | |
5364 | { | |
5365 | address_item *addr = addr_route; | |
5366 | addr_route = addr->next; | |
5367 | ||
5368 | deliver_domain = addr->domain; /* set $domain */ | |
5369 | if ((rc = match_isinlist(addr->domain, &queue_domains, 0, | |
5370 | &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL)) | |
5371 | != OK) | |
5372 | { | |
5373 | if (rc == DEFER) | |
5374 | { | |
5375 | addr->basic_errno = ERRNO_LISTDEFER; | |
5376 | addr->message = US"queue_domains lookup deferred"; | |
5377 | (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0); | |
5378 | } | |
5379 | else | |
5380 | { | |
5381 | addr->next = okaddr; | |
5382 | okaddr = addr; | |
5383 | } | |
5384 | } | |
5385 | else | |
5386 | { | |
5387 | addr->basic_errno = ERRNO_QUEUE_DOMAIN; | |
5388 | addr->message = US"domain is in queue_domains"; | |
5389 | (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0); | |
5390 | } | |
5391 | } | |
5392 | ||
5393 | addr_route = okaddr; | |
5394 | } | |
5395 | ||
5396 | /* Now route those addresses that are not deferred. */ | |
5397 | ||
5398 | while (addr_route != NULL) | |
5399 | { | |
5400 | int rc; | |
5401 | address_item *addr = addr_route; | |
5402 | uschar *old_domain = addr->domain; | |
5403 | uschar *old_unique = addr->unique; | |
5404 | addr_route = addr->next; | |
5405 | addr->next = NULL; | |
5406 | ||
5407 | /* Just in case some router parameter refers to it. */ | |
5408 | ||
5409 | return_path = (addr->p.errors_address != NULL)? | |
5410 | addr->p.errors_address : sender_address; | |
5411 | ||
5412 | /* If a router defers an address, add a retry item. Whether or not to | |
5413 | use the local part in the key is a property of the router. */ | |
5414 | ||
5415 | if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new, | |
5416 | &addr_succeed, v_none)) == DEFER) | |
5417 | retry_add_item(addr, (addr->router->retry_use_local_part)? | |
5418 | string_sprintf("R:%s@%s", addr->local_part, addr->domain) : | |
5419 | string_sprintf("R:%s", addr->domain), 0); | |
5420 | ||
5421 | /* Otherwise, if there is an existing retry record in the database, add | |
5422 | retry items to delete both forms. Since the domain might have been | |
5423 | rewritten (expanded to fully qualified) as a result of routing, ensure | |
5424 | that the rewritten form is also deleted. */ | |
5425 | ||
5426 | else if (testflag(addr, af_dr_retry_exists)) | |
5427 | { | |
5428 | retry_add_item(addr, addr->address_retry_key, rf_delete); | |
5429 | retry_add_item(addr, addr->domain_retry_key, rf_delete); | |
5430 | if (Ustrcmp(addr->domain, old_domain) != 0) | |
5431 | retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete); | |
5432 | } | |
5433 | ||
5434 | /* DISCARD is given for :blackhole: and "seen finish". The event has been | |
5435 | logged, but we need to ensure the address (and maybe parents) is marked | |
5436 | done. */ | |
5437 | ||
5438 | if (rc == DISCARD) | |
5439 | { | |
5440 | address_done(addr, tod_stamp(tod_log)); | |
5441 | continue; /* route next address */ | |
5442 | } | |
5443 | ||
5444 | /* The address is finished with (failed or deferred). */ | |
5445 | ||
5446 | if (rc != OK) | |
5447 | { | |
5448 | (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0); | |
5449 | continue; /* route next address */ | |
5450 | } | |
5451 | ||
5452 | /* The address has been routed. If the router changed the domain, it will | |
5453 | also have changed the unique address. We have to test whether this address | |
5454 | has already been delivered, because it's the unique address that finally | |
5455 | gets recorded. */ | |
5456 | ||
5457 | if (addr->unique != old_unique && | |
5458 | tree_search(tree_nonrecipients, addr->unique) != 0) | |
5459 | { | |
5460 | DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: " | |
5461 | "discarded\n", addr->address); | |
5462 | if (addr_remote == addr) addr_remote = addr->next; | |
5463 | else if (addr_local == addr) addr_local = addr->next; | |
5464 | } | |
5465 | ||
5466 | /* If the router has same_domain_copy_routing set, we are permitted to copy | |
5467 | the routing for any other addresses with the same domain. This is an | |
5468 | optimisation to save repeated DNS lookups for "standard" remote domain | |
5469 | routing. The option is settable only on routers that generate host lists. | |
5470 | We play it very safe, and do the optimization only if the address is routed | |
5471 | to a remote transport, there are no header changes, and the domain was not | |
5472 | modified by the router. */ | |
5473 | ||
5474 | if (addr_remote == addr && | |
5475 | addr->router->same_domain_copy_routing && | |
5476 | addr->p.extra_headers == NULL && | |
5477 | addr->p.remove_headers == NULL && | |
5478 | old_domain == addr->domain) | |
5479 | { | |
5480 | address_item **chain = &addr_route; | |
5481 | while (*chain != NULL) | |
5482 | { | |
5483 | address_item *addr2 = *chain; | |
5484 | if (Ustrcmp(addr2->domain, addr->domain) != 0) | |
5485 | { | |
5486 | chain = &(addr2->next); | |
5487 | continue; | |
5488 | } | |
5489 | ||
5490 | /* Found a suitable address; take it off the routing list and add it to | |
5491 | the remote delivery list. */ | |
5492 | ||
5493 | *chain = addr2->next; | |
5494 | addr2->next = addr_remote; | |
5495 | addr_remote = addr2; | |
5496 | ||
5497 | /* Copy the routing data */ | |
5498 | ||
5499 | addr2->domain = addr->domain; | |
5500 | addr2->router = addr->router; | |
5501 | addr2->transport = addr->transport; | |
5502 | addr2->host_list = addr->host_list; | |
5503 | addr2->fallback_hosts = addr->fallback_hosts; | |
5504 | addr2->p.errors_address = addr->p.errors_address; | |
5505 | copyflag(addr2, addr, af_hide_child | af_local_host_removed); | |
5506 | ||
5507 | DEBUG(D_deliver|D_route) | |
5508 | { | |
5509 | debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n" | |
5510 | "routing %s\n" | |
5511 | "Routing for %s copied from %s\n", | |
5512 | addr2->address, addr2->address, addr->address); | |
5513 | } | |
5514 | } | |
5515 | } | |
5516 | } /* Continue with routing the next address. */ | |
5517 | } /* Loop to process any child addresses that the routers created, and | |
5518 | any rerouted addresses that got put back on the new chain. */ | |
5519 | ||
5520 | ||
5521 | /* Debugging: show the results of the routing */ | |
5522 | ||
5523 | DEBUG(D_deliver|D_retry|D_route) | |
5524 | { | |
5525 | address_item *p = addr_local; | |
5526 | debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); | |
5527 | debug_printf("After routing:\n Local deliveries:\n"); | |
5528 | while (p != NULL) | |
5529 | { | |
5530 | debug_printf(" %s\n", p->address); | |
5531 | p = p->next; | |
5532 | } | |
5533 | ||
5534 | p = addr_remote; | |
5535 | debug_printf(" Remote deliveries:\n"); | |
5536 | while (p != NULL) | |
5537 | { | |
5538 | debug_printf(" %s\n", p->address); | |
5539 | p = p->next; | |
5540 | } | |
5541 | ||
5542 | p = addr_failed; | |
5543 | debug_printf(" Failed addresses:\n"); | |
5544 | while (p != NULL) | |
5545 | { | |
5546 | debug_printf(" %s\n", p->address); | |
5547 | p = p->next; | |
5548 | } | |
5549 | ||
5550 | p = addr_defer; | |
5551 | debug_printf(" Deferred addresses:\n"); | |
5552 | while (p != NULL) | |
5553 | { | |
5554 | debug_printf(" %s\n", p->address); | |
5555 | p = p->next; | |
5556 | } | |
5557 | } | |
5558 | ||
5559 | /* Free any resources that were cached during routing. */ | |
5560 | ||
5561 | search_tidyup(); | |
5562 | route_tidyup(); | |
5563 | ||
5564 | /* These two variables are set only during routing, after check_local_user. | |
5565 | Ensure they are not set in transports. */ | |
5566 | ||
5567 | local_user_gid = (gid_t)(-1); | |
5568 | local_user_uid = (uid_t)(-1); | |
5569 | ||
5570 | /* When acting as an MUA wrapper, we proceed only if all addresses route to a | |
5571 | remote transport. The check that they all end up in one transaction happens in | |
5572 | the do_remote_deliveries() function. */ | |
5573 | ||
5574 | if (mua_wrapper && (addr_local != NULL || addr_failed != NULL || | |
5575 | addr_defer != NULL)) | |
5576 | { | |
5577 | address_item *addr; | |
5578 | uschar *which, *colon, *msg; | |
5579 | ||
5580 | if (addr_local != NULL) | |
5581 | { | |
5582 | addr = addr_local; | |
5583 | which = US"local"; | |
5584 | } | |
5585 | else if (addr_defer != NULL) | |
5586 | { | |
5587 | addr = addr_defer; | |
5588 | which = US"deferred"; | |
5589 | } | |
5590 | else | |
5591 | { | |
5592 | addr = addr_failed; | |
5593 | which = US"failed"; | |
5594 | } | |
5595 | ||
5596 | while (addr->parent != NULL) addr = addr->parent; | |
5597 | ||
5598 | if (addr->message != NULL) | |
5599 | { | |
5600 | colon = US": "; | |
5601 | msg = addr->message; | |
5602 | } | |
5603 | else colon = msg = US""; | |
5604 | ||
5605 | /* We don't need to log here for a forced failure as it will already | |
5606 | have been logged. Defer will also have been logged, but as a defer, so we do | |
5607 | need to do the failure logging. */ | |
5608 | ||
5609 | if (addr != addr_failed) | |
5610 | log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery", | |
5611 | addr->address, which); | |
5612 | ||
5613 | /* Always write an error to the caller */ | |
5614 | ||
5615 | fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address, | |
5616 | which, colon, msg); | |
5617 | ||
5618 | final_yield = DELIVER_MUA_FAILED; | |
5619 | addr_failed = addr_defer = NULL; /* So that we remove the message */ | |
5620 | goto DELIVERY_TIDYUP; | |
5621 | } | |
5622 | ||
5623 | ||
5624 | /* If this is a run to continue deliveries to an external channel that is | |
5625 | already set up, defer any local deliveries. */ | |
5626 | ||
5627 | if (continue_transport != NULL) | |
5628 | { | |
5629 | if (addr_defer == NULL) addr_defer = addr_local; else | |
5630 | { | |
5631 | address_item *addr = addr_defer; | |
5632 | while (addr->next != NULL) addr = addr->next; | |
5633 | addr->next = addr_local; | |
5634 | } | |
5635 | addr_local = NULL; | |
5636 | } | |
5637 | ||
5638 | ||
5639 | /* Because address rewriting can happen in the routers, we should not really do | |
5640 | ANY deliveries until all addresses have been routed, so that all recipients of | |
5641 | the message get the same headers. However, this is in practice not always | |
5642 | possible, since sometimes remote addresses give DNS timeouts for days on end. | |
5643 | The pragmatic approach is to deliver what we can now, saving any rewritten | |
5644 | headers so that at least the next lot of recipients benefit from the rewriting | |
5645 | that has already been done. | |
5646 | ||
5647 | If any headers have been rewritten during routing, update the spool file to | |
5648 | remember them for all subsequent deliveries. This can be delayed till later if | |
5649 | there is only address to be delivered - if it succeeds the spool write need not | |
5650 | happen. */ | |
5651 | ||
5652 | if (header_rewritten && | |
5653 | ((addr_local != NULL && | |
5654 | (addr_local->next != NULL || addr_remote != NULL)) || | |
5655 | (addr_remote != NULL && addr_remote->next != NULL))) | |
5656 | { | |
5657 | /* Panic-dies on error */ | |
5658 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); | |
5659 | header_rewritten = FALSE; | |
5660 | } | |
5661 | ||
5662 | ||
5663 | /* If there are any deliveries to be done, open the journal file. This is used | |
5664 | to record successful deliveries as soon as possible after each delivery is | |
5665 | known to be complete. A file opened with O_APPEND is used so that several | |
5666 | processes can run simultaneously. | |
5667 | ||
5668 | The journal is just insurance against crashes. When the spool file is | |
5669 | ultimately updated at the end of processing, the journal is deleted. If a | |
5670 | journal is found to exist at the start of delivery, the addresses listed | |
5671 | therein are added to the non-recipients. */ | |
5672 | ||
5673 | if (addr_local != NULL || addr_remote != NULL) | |
5674 | { | |
5675 | sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id); | |
5676 | journal_fd = Uopen(spoolname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE); | |
5677 | ||
5678 | if (journal_fd < 0) | |
5679 | { | |
5680 | log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s", | |
5681 | spoolname, strerror(errno)); | |
5682 | return DELIVER_NOT_ATTEMPTED; | |
5683 | } | |
5684 | ||
5685 | /* Set the close-on-exec flag, make the file owned by Exim, and ensure | |
5686 | that the mode is correct - the group setting doesn't always seem to get | |
5687 | set automatically. */ | |
5688 | ||
5689 | fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC); | |
5690 | fchown(journal_fd, exim_uid, exim_gid); | |
5691 | fchmod(journal_fd, SPOOL_MODE); | |
5692 | } | |
5693 | ||
5694 | ||
5695 | /* Now we can get down to the business of actually doing deliveries. Local | |
5696 | deliveries are done first, then remote ones. If ever the problems of how to | |
5697 | handle fallback transports are figured out, this section can be put into a loop | |
5698 | for handling fallbacks, though the uid switching will have to be revised. */ | |
5699 | ||
5700 | if (addr_local != NULL) | |
5701 | { | |
5702 | DEBUG(D_deliver|D_transport) | |
5703 | debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n"); | |
5704 | do_local_deliveries(); | |
5705 | disable_logging = FALSE; | |
5706 | } | |
5707 | ||
5708 | /* If queue_run_local is set, we do not want to attempt any remote deliveries, | |
5709 | so just queue them all. */ | |
5710 | ||
5711 | if (queue_run_local) | |
5712 | { | |
5713 | while (addr_remote != NULL) | |
5714 | { | |
5715 | address_item *addr = addr_remote; | |
5716 | addr_remote = addr->next; | |
5717 | addr->next = NULL; | |
5718 | addr->basic_errno = ERRNO_LOCAL_ONLY; | |
5719 | addr->message = US"remote deliveries suppressed"; | |
5720 | (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0); | |
5721 | } | |
5722 | } | |
5723 | ||
5724 | /* Handle remote deliveries */ | |
5725 | ||
5726 | if (addr_remote != NULL) | |
5727 | { | |
5728 | DEBUG(D_deliver|D_transport) | |
5729 | debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n"); | |
5730 | ||
5731 | /* Precompile some regex that are used to recognize parameters in response | |
5732 | to an EHLO command, if they aren't already compiled. */ | |
5733 | ||
5734 | if (regex_PIPELINING == NULL) regex_PIPELINING = | |
5735 | regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE); | |
5736 | ||
5737 | if (regex_SIZE == NULL) regex_SIZE = | |
5738 | regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE); | |
5739 | ||
5740 | if (regex_AUTH == NULL) regex_AUTH = | |
5741 | regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)", | |
5742 | FALSE, TRUE); | |
5743 | ||
5744 | #ifdef SUPPORT_TLS | |
5745 | if (regex_STARTTLS == NULL) regex_STARTTLS = | |
5746 | regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE); | |
5747 | #endif | |
5748 | ||
5749 | /* Now sort the addresses if required, and do the deliveries. The yield of | |
5750 | do_remote_deliveries is FALSE when mua_wrapper is set and all addresses | |
5751 | cannot be delivered in one transaction. */ | |
5752 | ||
5753 | if (remote_sort_domains != NULL) sort_remote_deliveries(); | |
5754 | if (!do_remote_deliveries(FALSE)) | |
5755 | { | |
5756 | log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all " | |
5757 | "be delivered in one transaction"); | |
5758 | fprintf(stderr, "delivery to smarthost failed (configuration problem)\n"); | |
5759 | ||
5760 | final_yield = DELIVER_MUA_FAILED; | |
5761 | addr_failed = addr_defer = NULL; /* So that we remove the message */ | |
5762 | goto DELIVERY_TIDYUP; | |
5763 | } | |
5764 | ||
5765 | /* See if any of the addresses that failed got put on the queue for delivery | |
5766 | to their fallback hosts. We do it this way because often the same fallback | |
5767 | host is used for many domains, so all can be sent in a single transaction | |
5768 | (if appropriately configured). */ | |
5769 | ||
5770 | if (addr_fallback != NULL && !mua_wrapper) | |
5771 | { | |
5772 | DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n"); | |
5773 | addr_remote = addr_fallback; | |
5774 | addr_fallback = NULL; | |
5775 | if (remote_sort_domains != NULL) sort_remote_deliveries(); | |
5776 | do_remote_deliveries(TRUE); | |
5777 | } | |
5778 | disable_logging = FALSE; | |
5779 | } | |
5780 | ||
5781 | ||
5782 | /* All deliveries are now complete. Ignore SIGTERM during this tidying up | |
5783 | phase, to minimize cases of half-done things. */ | |
5784 | ||
5785 | DEBUG(D_deliver) | |
5786 | debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n"); | |
5787 | ||
5788 | /* Root privilege is no longer needed */ | |
5789 | ||
5790 | exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying"); | |
5791 | ||
5792 | set_process_info("tidying up after delivering %s", message_id); | |
5793 | signal(SIGTERM, SIG_IGN); | |
5794 | ||
5795 | /* When we are acting as an MUA wrapper, the smtp transport will either have | |
5796 | succeeded for all addresses, or failed them all. We do not ever want to retry, | |
5797 | nor do we want to send a bounce message. */ | |
5798 | ||
5799 | if (mua_wrapper) | |
5800 | { | |
5801 | if (addr_failed == NULL) final_yield = DELIVER_MUA_SUCCEEDED; else | |
5802 | { | |
5803 | uschar *s = (addr_failed->user_message != NULL)? | |
5804 | addr_failed->user_message : addr_failed->message; | |
5805 | ||
5806 | fprintf(stderr, "Delivery failed: "); | |
5807 | if (addr_failed->basic_errno > 0) | |
5808 | { | |
5809 | fprintf(stderr, "%s", strerror(addr_failed->basic_errno)); | |
5810 | if (s != NULL) fprintf(stderr, ": "); | |
5811 | } | |
5812 | if (s == NULL) | |
5813 | { | |
5814 | if (addr_failed->basic_errno <= 0) fprintf(stderr, "unknown error"); | |
5815 | } | |
5816 | else fprintf(stderr, "%s", CS s); | |
5817 | fprintf(stderr, "\n"); | |
5818 | ||
5819 | final_yield = DELIVER_MUA_FAILED; | |
5820 | addr_failed = NULL; | |
5821 | } | |
5822 | } | |
5823 | ||
5824 | /* In a normal configuration, we now update the retry database. This is done in | |
5825 | one fell swoop at the end in order not to keep opening and closing (and | |
5826 | locking) the database. The code for handling retries is hived off into a | |
5827 | separate module for convenience. We pass it the addresses of the various | |
5828 | chains, because deferred addresses can get moved onto the failed chain if the | |
5829 | retry cutoff time has expired for all alternative destinations. Bypass the | |
5830 | updating of the database if the -N flag is set, which is a debugging thing that | |
5831 | prevents actual delivery. */ | |
5832 | ||
5833 | else if (!dont_deliver) retry_update(&addr_defer, &addr_failed, &addr_succeed); | |
5834 | ||
5835 | /* If any addresses failed, we must send a message to somebody, unless | |
5836 | af_ignore_error is set, in which case no action is taken. It is possible for | |
5837 | several messages to get sent if there are addresses with different | |
5838 | requirements. */ | |
5839 | ||
5840 | while (addr_failed != NULL) | |
5841 | { | |
5842 | pid_t pid; | |
5843 | int fd; | |
5844 | uschar *logtod = tod_stamp(tod_log); | |
5845 | address_item *addr; | |
5846 | address_item *handled_addr = NULL; | |
5847 | address_item **paddr; | |
5848 | address_item *msgchain = NULL; | |
5849 | address_item **pmsgchain = &msgchain; | |
5850 | ||
5851 | /* There are weird cases when logging is disabled in the transport. However, | |
5852 | there may not be a transport (address failed by a router). */ | |
5853 | ||
5854 | disable_logging = FALSE; | |
5855 | if (addr_failed->transport != NULL) | |
5856 | disable_logging = addr_failed->transport->disable_logging; | |
5857 | ||
5858 | DEBUG(D_deliver) | |
5859 | debug_printf("processing failed address %s\n", addr_failed->address); | |
5860 | ||
5861 | /* There are only two ways an address in a bounce message can get here: | |
5862 | ||
5863 | (1) When delivery was initially deferred, but has now timed out (in the call | |
5864 | to retry_update() above). We can detect this by testing for | |
5865 | af_retry_timedout. If the address does not have its own errors address, | |
5866 | we arrange to ignore the error. | |
5867 | ||
5868 | (2) If delivery failures for bounce messages are being ignored. We can detect | |
5869 | this by testing for af_ignore_error. This will also be set if a bounce | |
5870 | message has been autothawed and the ignore_bounce_errors_after time has | |
5871 | passed. It might also be set if a router was explicitly configured to | |
5872 | ignore errors (errors_to = ""). | |
5873 | ||
5874 | If neither of these cases obtains, something has gone wrong. Log the | |
5875 | incident, but then ignore the error. */ | |
5876 | ||
5877 | if (sender_address[0] == 0 && addr_failed->p.errors_address == NULL) | |
5878 | { | |
5879 | if (!testflag(addr_failed, af_retry_timedout) && | |
5880 | !testflag(addr_failed, af_ignore_error)) | |
5881 | { | |
5882 | log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message " | |
5883 | "failure is neither frozen nor ignored (it's been ignored)"); | |
5884 | } | |
5885 | setflag(addr_failed, af_ignore_error); | |
5886 | } | |
5887 | ||
5888 | /* If the first address on the list has af_ignore_error set, just remove | |
5889 | it from the list, throw away any saved message file, log it, and | |
5890 | mark the recipient done. */ | |
5891 | ||
5892 | if (testflag(addr_failed, af_ignore_error)) | |
5893 | { | |
5894 | addr = addr_failed; | |
5895 | addr_failed = addr->next; | |
5896 | if (addr->return_filename != NULL) Uunlink(addr->return_filename); | |
5897 | ||
5898 | log_write(0, LOG_MAIN, "%s%s%s%s: error ignored", | |
5899 | addr->address, | |
5900 | (addr->parent == NULL)? US"" : US" <", | |
5901 | (addr->parent == NULL)? US"" : addr->parent->address, | |
5902 | (addr->parent == NULL)? US"" : US">"); | |
5903 | ||
5904 | address_done(addr, logtod); | |
5905 | child_done(addr, logtod); | |
5906 | /* Panic-dies on error */ | |
5907 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); | |
5908 | } | |
5909 | ||
5910 | /* Otherwise, handle the sending of a message. Find the error address for | |
5911 | the first address, then send a message that includes all failed addresses | |
5912 | that have the same error address. Note the bounce_recipient is a global so | |
5913 | that it can be accesssed by $bounce_recipient while creating a customized | |
5914 | error message. */ | |
5915 | ||
5916 | else | |
5917 | { | |
5918 | bounce_recipient = (addr_failed->p.errors_address == NULL)? | |
5919 | sender_address : addr_failed->p.errors_address; | |
5920 | ||
5921 | /* Make a subprocess to send a message */ | |
5922 | ||
5923 | pid = child_open_exim(&fd); | |
5924 | ||
5925 | /* Creation of child failed */ | |
5926 | ||
5927 | if (pid < 0) | |
5928 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to " | |
5929 | "create child process to send failure message: %s", getpid(), | |
5930 | getppid(), strerror(errno)); | |
5931 | ||
5932 | /* Creation of child succeeded */ | |
5933 | ||
5934 | else | |
5935 | { | |
5936 | int ch, rc; | |
5937 | int filecount = 0; | |
5938 | int rcount = 0; | |
5939 | uschar *bcc, *emf_text; | |
5940 | FILE *f = fdopen(fd, "wb"); | |
5941 | FILE *emf = NULL; | |
5942 | BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0; | |
5943 | int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) * | |
5944 | DELIVER_IN_BUFFER_SIZE; | |
5945 | ||
5946 | DEBUG(D_deliver) | |
5947 | debug_printf("sending error message to: %s\n", bounce_recipient); | |
5948 | ||
5949 | /* Scan the addresses for all that have the same errors address, removing | |
5950 | them from the addr_failed chain, and putting them on msgchain. */ | |
5951 | ||
5952 | paddr = &addr_failed; | |
5953 | for (addr = addr_failed; addr != NULL; addr = *paddr) | |
5954 | { | |
5955 | if (Ustrcmp(bounce_recipient, (addr->p.errors_address == NULL)? | |
5956 | sender_address : addr->p.errors_address) != 0) | |
5957 | { | |
5958 | paddr = &(addr->next); /* Not the same; skip */ | |
5959 | } | |
5960 | else /* The same - dechain */ | |
5961 | { | |
5962 | *paddr = addr->next; | |
5963 | *pmsgchain = addr; | |
5964 | addr->next = NULL; | |
5965 | pmsgchain = &(addr->next); | |
5966 | } | |
5967 | } | |
5968 | ||
5969 | /* Include X-Failed-Recipients: for automatic interpretation, but do | |
5970 | not let any one header line get too long. We do this by starting a | |
5971 | new header every 50 recipients. Omit any addresses for which the | |
5972 | "hide_child" flag is set. */ | |
5973 | ||
5974 | for (addr = msgchain; addr != NULL; addr = addr->next) | |
5975 | { | |
5976 | if (testflag(addr, af_hide_child)) continue; | |
5977 | if (rcount >= 50) | |
5978 | { | |
5979 | fprintf(f, "\n"); | |
5980 | rcount = 0; | |
5981 | } | |
5982 | fprintf(f, "%s%s", | |
5983 | (rcount++ == 0)? "X-Failed-Recipients: " : ",\n ", | |
5984 | (testflag(addr, af_pfr) && addr->parent != NULL)? | |
5985 | string_printing(addr->parent->address) : | |
5986 | string_printing(addr->address)); | |
5987 | } | |
5988 | if (rcount > 0) fprintf(f, "\n"); | |
5989 | ||
5990 | /* Output the standard headers */ | |
5991 | ||
5992 | if (errors_reply_to != NULL) | |
5993 | fprintf(f, "Reply-To: %s\n", errors_reply_to); | |
5994 | fprintf(f, "Auto-Submitted: auto-generated\n"); | |
5995 | fprintf(f, "From: Mail Delivery System <Mailer-Daemon@%s>\n", | |
5996 | qualify_domain_sender); | |
5997 | fprintf(f, "To: %s\n", bounce_recipient); | |
5998 | ||
5999 | /* Open a template file if one is provided. Log failure to open, but | |
6000 | carry on - default texts will be used. */ | |
6001 | ||
6002 | if (bounce_message_file != NULL) | |
6003 | { | |
6004 | emf = Ufopen(bounce_message_file, "rb"); | |
6005 | if (emf == NULL) | |
6006 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error " | |
6007 | "message texts: %s", bounce_message_file, strerror(errno)); | |
6008 | } | |
6009 | ||
6010 | /* Quietly copy to configured additional addresses if required. */ | |
6011 | ||
6012 | bcc = moan_check_errorcopy(bounce_recipient); | |
6013 | if (bcc != NULL) fprintf(f, "Bcc: %s\n", bcc); | |
6014 | ||
6015 | /* The texts for the message can be read from a template file; if there | |
6016 | isn't one, or if it is too short, built-in texts are used. The first | |
6017 | emf text is a Subject: and any other headers. */ | |
6018 | ||
6019 | emf_text = next_emf(emf, US"header"); | |
6020 | if (emf_text != NULL) fprintf(f, "%s\n", emf_text); else | |
6021 | { | |
6022 | fprintf(f, "Subject: Mail delivery failed%s\n\n", | |
6023 | to_sender? ": returning message to sender" : ""); | |
6024 | } | |
6025 | ||
6026 | emf_text = next_emf(emf, US"intro"); | |
6027 | if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else | |
6028 | { | |
6029 | fprintf(f, | |
6030 | /* This message has been reworded several times. It seems to be confusing to | |
6031 | somebody, however it is worded. I have retreated to the original, simple | |
6032 | wording. */ | |
6033 | "This message was created automatically by mail delivery software.\n"); | |
6034 | if (bounce_message_text != NULL) fprintf(f, "%s", CS bounce_message_text); | |
6035 | if (to_sender) | |
6036 | { | |
6037 | fprintf(f, | |
6038 | "\nA message that you sent could not be delivered to one or more of its\n" | |
6039 | "recipients. This is a permanent error. The following address(es) failed:\n"); | |
6040 | } | |
6041 | else | |
6042 | { | |
6043 | fprintf(f, | |
6044 | "\nA message sent by\n\n <%s>\n\n" | |
6045 | "could not be delivered to one or more of its recipients. The following\n" | |
6046 | "address(es) failed:\n", sender_address); | |
6047 | } | |
6048 | } | |
6049 | fprintf(f, "\n"); | |
6050 | ||
6051 | /* Process the addresses, leaving them on the msgchain if they have a | |
6052 | file name for a return message. (There has already been a check in | |
6053 | post_process_one() for the existence of data in the message file.) */ | |
6054 | ||
6055 | paddr = &msgchain; | |
6056 | for (addr = msgchain; addr != NULL; addr = *paddr) | |
6057 | { | |
6058 | if (print_address_information(addr, f, US" ", US"\n ", US"")) | |
6059 | { | |
6060 | /* A TRUE return from print_address_information() means that the | |
6061 | address is not hidden. If there is a return file, it has already | |
6062 | been checked to ensure it is not empty. Omit the bland "return | |
6063 | message generated" error, but otherwise include error information. */ | |
6064 | ||
6065 | if (addr->return_file < 0 || | |
6066 | addr->message == NULL || | |
6067 | Ustrcmp(addr->message, "return message generated") != 0) | |
6068 | { | |
6069 | fprintf(f, "\n "); | |
6070 | print_address_error(addr, f); | |
6071 | } | |
6072 | } | |
6073 | ||
6074 | /* End the final line for the address */ | |
6075 | ||
6076 | fputc('\n', f); | |
6077 | ||
6078 | /* Leave on msgchain if there's a return file. */ | |
6079 | ||
6080 | if (addr->return_file >= 0) | |
6081 | { | |
6082 | paddr = &(addr->next); | |
6083 | filecount++; | |
6084 | } | |
6085 | ||
6086 | /* Else save so that we can tick off the recipient when the | |
6087 | message is sent. */ | |
6088 | ||
6089 | else | |
6090 | { | |
6091 | *paddr = addr->next; | |
6092 | addr->next = handled_addr; | |
6093 | handled_addr = addr; | |
6094 | } | |
6095 | } | |
6096 | ||
6097 | fprintf(f, "\n"); | |
6098 | ||
6099 | /* Get the next text, whether we need it or not, so as to be | |
6100 | positioned for the one after. */ | |
6101 | ||
6102 | emf_text = next_emf(emf, US"generated text"); | |
6103 | ||
6104 | /* If there were any file messages passed by the local transports, | |
6105 | include them in the message. Then put the address on the handled chain. | |
6106 | In the case of a batch of addresses that were all sent to the same | |
6107 | transport, the return_file field in all of them will contain the same | |
6108 | fd, and the return_filename field in the *last* one will be set (to the | |
6109 | name of the file). */ | |
6110 | ||
6111 | if (msgchain != NULL) | |
6112 | { | |
6113 | address_item *nextaddr; | |
6114 | ||
6115 | if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else | |
6116 | fprintf(f, | |
6117 | "The following text was generated during the delivery " | |
6118 | "attempt%s:\n", (filecount > 1)? "s" : ""); | |
6119 | ||
6120 | for (addr = msgchain; addr != NULL; addr = nextaddr) | |
6121 | { | |
6122 | FILE *fm; | |
6123 | address_item *topaddr = addr; | |
6124 | ||
6125 | /* List all the addresses that relate to this file */ | |
6126 | ||
6127 | fprintf(f, "\n"); | |
6128 | while(addr != NULL) /* Insurance */ | |
6129 | { | |
6130 | print_address_information(addr, f, US"------ ", US"\n ", | |
6131 | US" ------\n"); | |
6132 | if (addr->return_filename != NULL) break; | |
6133 | addr = addr->next; | |
6134 | } | |
6135 | fprintf(f, "\n"); | |
6136 | ||
6137 | /* Now copy the file */ | |
6138 | ||
6139 | fm = Ufopen(addr->return_filename, "rb"); | |
6140 | ||
6141 | if (fm == NULL) | |
6142 | fprintf(f, " +++ Exim error... failed to open text file: %s\n", | |
6143 | strerror(errno)); | |
6144 | else | |
6145 | { | |
6146 | while ((ch = fgetc(fm)) != EOF) fputc(ch, f); | |
6147 | fclose(fm); | |
6148 | } | |
6149 | Uunlink(addr->return_filename); | |
6150 | ||
6151 | /* Can now add to handled chain, first fishing off the next | |
6152 | address on the msgchain. */ | |
6153 | ||
6154 | nextaddr = addr->next; | |
6155 | addr->next = handled_addr; | |
6156 | handled_addr = topaddr; | |
6157 | } | |
6158 | fprintf(f, "\n"); | |
6159 | } | |
6160 | ||
6161 | /* Now copy the message, trying to give an intelligible comment if | |
6162 | it is too long for it all to be copied. The limit isn't strictly | |
6163 | applied because of the buffering. There is, however, an option | |
6164 | to suppress copying altogether. */ | |
6165 | ||
6166 | emf_text = next_emf(emf, US"copy"); | |
6167 | ||
6168 | if (bounce_return_message) | |
6169 | { | |
6170 | int topt = topt_add_return_path; | |
6171 | if (!bounce_return_body) topt |= topt_no_body; | |
6172 | ||
6173 | if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else | |
6174 | { | |
6175 | if (bounce_return_body) fprintf(f, | |
6176 | "------ This is a copy of the message, including all the headers. ------\n"); | |
6177 | else fprintf(f, | |
6178 | "------ This is a copy of the message's headers. ------\n"); | |
6179 | } | |
6180 | ||
6181 | /* While reading the "truncated" message, set return_size_limit to | |
6182 | the actual max testing value, rounded. We need to read the message | |
6183 | whether we are going to use it or not. */ | |
6184 | ||
6185 | { | |
6186 | int temp = bounce_return_size_limit; | |
6187 | bounce_return_size_limit = (max/1000)*1000; | |
6188 | emf_text = next_emf(emf, US"truncated"); | |
6189 | bounce_return_size_limit = temp; | |
6190 | } | |
6191 | ||
6192 | if (bounce_return_body && bounce_return_size_limit > 0) | |
6193 | { | |
6194 | struct stat statbuf; | |
6195 | if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max) | |
6196 | { | |
6197 | if (emf_text != NULL) fprintf(f, "%s", CS emf_text); else | |
6198 | { | |
6199 | fprintf(f, | |
6200 | "------ The body of the message is %d characters long; only the first\n" | |
6201 | "------ %d or so are included here.\n", (int)statbuf.st_size, max); | |
6202 | } | |
6203 | } | |
6204 | } | |
6205 | ||
6206 | fprintf(f, "\n"); | |
6207 | fflush(f); | |
6208 | transport_filter_argv = NULL; /* Just in case */ | |
6209 | return_path = sender_address; /* In case not previously set */ | |
6210 | transport_write_message(NULL, fileno(f), topt, | |
6211 | bounce_return_size_limit, NULL, NULL, NULL, NULL, NULL, 0); | |
6212 | } | |
6213 | ||
6214 | /* Write final text and close the template file if one is open */ | |
6215 | ||
6216 | if (emf != NULL) | |
6217 | { | |
6218 | emf_text = next_emf(emf, US"final"); | |
6219 | if (emf_text != NULL) fprintf(f, "%s", CS emf_text); | |
6220 | fclose(emf); | |
6221 | } | |
6222 | ||
6223 | /* Close the file, which should send an EOF to the child process | |
6224 | that is receiving the message. Wait for it to finish. */ | |
6225 | ||
6226 | fclose(f); | |
6227 | rc = child_close(pid, 0); /* Waits for child to close, no timeout */ | |
6228 | ||
6229 | /* In the test harness, let the child do it's thing first. */ | |
6230 | ||
6231 | if (running_in_test_harness) millisleep(500); | |
6232 | ||
6233 | /* If the process failed, there was some disaster in setting up the | |
6234 | error message. Unless the message is very old, ensure that addr_defer | |
6235 | is non-null, which will have the effect of leaving the message on the | |
6236 | spool. The failed addresses will get tried again next time. However, we | |
6237 | don't really want this to happen too often, so freeze the message unless | |
6238 | there are some genuine deferred addresses to try. To do this we have | |
6239 | to call spool_write_header() here, because with no genuine deferred | |
6240 | addresses the normal code below doesn't get run. */ | |
6241 | ||
6242 | if (rc != 0) | |
6243 | { | |
6244 | uschar *s = US""; | |
6245 | if (now - received_time < retry_maximum_timeout && addr_defer == NULL) | |
6246 | { | |
6247 | addr_defer = (address_item *)(+1); | |
6248 | deliver_freeze = TRUE; | |
6249 | deliver_frozen_at = time(NULL); | |
6250 | /* Panic-dies on error */ | |
6251 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); | |
6252 | s = US" (frozen)"; | |
6253 | } | |
6254 | deliver_msglog("Process failed (%d) when writing error message " | |
6255 | "to %s%s", rc, bounce_recipient, s); | |
6256 | log_write(0, LOG_MAIN, "Process failed (%d) when writing error message " | |
6257 | "to %s%s", rc, bounce_recipient, s); | |
6258 | } | |
6259 | ||
6260 | /* The message succeeded. Ensure that the recipients that failed are | |
6261 | now marked finished with on the spool and their parents updated. */ | |
6262 | ||
6263 | else | |
6264 | { | |
6265 | for (addr = handled_addr; addr != NULL; addr = addr->next) | |
6266 | { | |
6267 | address_done(addr, logtod); | |
6268 | child_done(addr, logtod); | |
6269 | } | |
6270 | /* Panic-dies on error */ | |
6271 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); | |
6272 | } | |
6273 | } | |
6274 | } | |
6275 | } | |
6276 | ||
6277 | disable_logging = FALSE; /* In case left set */ | |
6278 | ||
6279 | /* Come here from the mua_wrapper case if routing goes wrong */ | |
6280 | ||
6281 | DELIVERY_TIDYUP: | |
6282 | ||
6283 | /* If there are now no deferred addresses, we are done. Preserve the | |
6284 | message log if so configured, and we are using them. Otherwise, sling it. | |
6285 | Then delete the message itself. */ | |
6286 | ||
6287 | if (addr_defer == NULL) | |
6288 | { | |
6289 | if (message_logs) | |
6290 | { | |
6291 | sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, | |
6292 | id); | |
6293 | if (preserve_message_logs) | |
6294 | { | |
6295 | int rc; | |
6296 | sprintf(CS big_buffer, "%s/msglog.OLD/%s", spool_directory, id); | |
6297 | if ((rc = Urename(spoolname, big_buffer)) < 0) | |
6298 | { | |
6299 | (void)directory_make(spool_directory, US"msglog.OLD", | |
6300 | MSGLOG_DIRECTORY_MODE, TRUE); | |
6301 | rc = Urename(spoolname, big_buffer); | |
6302 | } | |
6303 | if (rc < 0) | |
6304 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the " | |
6305 | "msglog.OLD directory", spoolname); | |
6306 | } | |
6307 | else | |
6308 | { | |
6309 | if (Uunlink(spoolname) < 0) | |
6310 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s", spoolname); | |
6311 | } | |
6312 | } | |
6313 | ||
6314 | /* Remove the two message files. */ | |
6315 | ||
6316 | sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id); | |
6317 | if (Uunlink(spoolname) < 0) | |
6318 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s", spoolname); | |
6319 | sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id); | |
6320 | if (Uunlink(spoolname) < 0) | |
6321 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s", spoolname); | |
6322 | log_write(0, LOG_MAIN, "Completed"); | |
6323 | } | |
6324 | ||
6325 | /* If there are deferred addresses, we are keeping this message because it is | |
6326 | not yet completed. Lose any temporary files that were catching output from | |
6327 | pipes for any of the deferred addresses, handle one-time aliases, and see if | |
6328 | the message has been on the queue for so long that it is time to send a warning | |
6329 | message to the sender, unless it is a mailer-daemon. If all deferred addresses | |
6330 | have the same domain, we can set deliver_domain for the expansion of | |
6331 | delay_warning_ condition - if any of them are pipes, files, or autoreplies, use | |
6332 | the parent's domain. | |
6333 | ||
6334 | If all the deferred addresses have an error number that indicates "retry time | |
6335 | not reached", skip sending the warning message, because it won't contain the | |
6336 | reason for the delay. It will get sent at the next real delivery attempt. | |
6337 | However, if at least one address has tried, we'd better include all of them in | |
6338 | the message. | |
6339 | ||
6340 | If we can't make a process to send the message, don't worry. | |
6341 | ||
6342 | For mailing list expansions we want to send the warning message to the | |
6343 | mailing list manager. We can't do a perfect job here, as some addresses may | |
6344 | have different errors addresses, but if we take the errors address from | |
6345 | each deferred address it will probably be right in most cases. | |
6346 | ||
6347 | If addr_defer == +1, it means there was a problem sending an error message | |
6348 | for failed addresses, and there were no "real" deferred addresses. The value | |
6349 | was set just to keep the message on the spool, so there is nothing to do here. | |
6350 | */ | |
6351 | ||
6352 | else if (addr_defer != (address_item *)(+1)) | |
6353 | { | |
6354 | address_item *addr; | |
6355 | uschar *recipients = US""; | |
6356 | BOOL delivery_attempted = FALSE; | |
6357 | ||
6358 | deliver_domain = testflag(addr_defer, af_pfr)? | |
6359 | addr_defer->parent->domain : addr_defer->domain; | |
6360 | ||
6361 | for (addr = addr_defer; addr != NULL; addr = addr->next) | |
6362 | { | |
6363 | address_item *otaddr; | |
6364 | ||
6365 | if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE; | |
6366 | ||
6367 | if (deliver_domain != NULL) | |
6368 | { | |
6369 | uschar *d = (testflag(addr, af_pfr))? addr->parent->domain : addr->domain; | |
6370 | ||
6371 | /* The domain may be unset for an address that has never been routed | |
6372 | because the system filter froze the message. */ | |
6373 | ||
6374 | if (d == NULL || Ustrcmp(d, deliver_domain) != 0) deliver_domain = NULL; | |
6375 | } | |
6376 | ||
6377 | if (addr->return_filename != NULL) Uunlink(addr->return_filename); | |
6378 | ||
6379 | /* Handle the case of one-time aliases. If any address in the ancestry | |
6380 | of this one is flagged, ensure it is in the recipients list, suitably | |
6381 | flagged, and that its parent is marked delivered. */ | |
6382 | ||
6383 | for (otaddr = addr; otaddr != NULL; otaddr = otaddr->parent) | |
6384 | if (otaddr->onetime_parent != NULL) break; | |
6385 | ||
6386 | if (otaddr != NULL) | |
6387 | { | |
6388 | int i; | |
6389 | int t = recipients_count; | |
6390 | ||
6391 | for (i = 0; i < recipients_count; i++) | |
6392 | { | |
6393 | uschar *r = recipients_list[i].address; | |
6394 | if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i; | |
6395 | if (Ustrcmp(otaddr->address, r) == 0) break; | |
6396 | } | |
6397 | ||
6398 | /* Didn't find the address already in the list, and did find the | |
6399 | ultimate parent's address in the list. After adding the recipient, | |
6400 | update the errors address in the recipients list. */ | |
6401 | ||
6402 | if (i >= recipients_count && t < recipients_count) | |
6403 | { | |
6404 | DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n", | |
6405 | otaddr->address, otaddr->parent->address); | |
6406 | receive_add_recipient(otaddr->address, t); | |
6407 | recipients_list[recipients_count-1].errors_to = otaddr->p.errors_address; | |
6408 | tree_add_nonrecipient(otaddr->parent->address); | |
6409 | update_spool = TRUE; | |
6410 | } | |
6411 | } | |
6412 | ||
6413 | /* Except for error messages, ensure that either the errors address for | |
6414 | this deferred address or, if there is none, the sender address, is on the | |
6415 | list of recipients for a warning message. */ | |
6416 | ||
6417 | if (sender_address[0] != 0) | |
6418 | { | |
6419 | if (addr->p.errors_address == NULL) | |
6420 | { | |
6421 | if (Ustrstr(recipients, sender_address) == NULL) | |
6422 | recipients = string_sprintf("%s%s%s", recipients, | |
6423 | (recipients[0] == 0)? "" : ",", sender_address); | |
6424 | } | |
6425 | else | |
6426 | { | |
6427 | if (Ustrstr(recipients, addr->p.errors_address) == NULL) | |
6428 | recipients = string_sprintf("%s%s%s", recipients, | |
6429 | (recipients[0] == 0)? "" : ",", addr->p.errors_address); | |
6430 | } | |
6431 | } | |
6432 | } | |
6433 | ||
6434 | /* Send a warning message if the conditions are right. If the condition check | |
6435 | fails because of a lookup defer, there is nothing we can do. The warning | |
6436 | is not sent. Another attempt will be made at the next delivery attempt (if | |
6437 | it also defers). */ | |
6438 | ||
6439 | if (!queue_2stage && delivery_attempted && | |
6440 | delay_warning[1] > 0 && sender_address[0] != 0 && | |
6441 | (delay_warning_condition == NULL || | |
6442 | expand_check_condition(delay_warning_condition, | |
6443 | US"delay_warning", US"option"))) | |
6444 | { | |
6445 | int count; | |
6446 | int show_time; | |
6447 | int queue_time = time(NULL) - received_time; | |
6448 | ||
6449 | /* When running in the test harness, there's an option that allows us to | |
6450 | fudge this time so as to get repeatability of the tests. Take the first | |
6451 | time off the list. In queue runs, the list pointer gets updated in the | |
6452 | calling process. */ | |
6453 | ||
6454 | if (running_in_test_harness && fudged_queue_times[0] != 0) | |
6455 | { | |
6456 | int qt = readconf_readtime(fudged_queue_times, '/', FALSE); | |
6457 | if (qt >= 0) | |
6458 | { | |
6459 | DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n", | |
6460 | fudged_queue_times); | |
6461 | queue_time = qt; | |
6462 | } | |
6463 | } | |
6464 | ||
6465 | /* See how many warnings we should have sent by now */ | |
6466 | ||
6467 | for (count = 0; count < delay_warning[1]; count++) | |
6468 | if (queue_time < delay_warning[count+2]) break; | |
6469 | ||
6470 | show_time = delay_warning[count+1]; | |
6471 | ||
6472 | if (count >= delay_warning[1]) | |
6473 | { | |
6474 | int extra; | |
6475 | int last_gap = show_time; | |
6476 | if (count > 1) last_gap -= delay_warning[count]; | |
6477 | extra = (queue_time - delay_warning[count+1])/last_gap; | |
6478 | show_time += last_gap * extra; | |
6479 | count += extra; | |
6480 | } | |
6481 | ||
6482 | DEBUG(D_deliver) | |
6483 | { | |
6484 | debug_printf("time on queue = %s\n", readconf_printtime(queue_time)); | |
6485 | debug_printf("warning counts: required %d done %d\n", count, | |
6486 | warning_count); | |
6487 | } | |
6488 | ||
6489 | /* We have computed the number of warnings there should have been by now. | |
6490 | If there haven't been enough, send one, and up the count to what it should | |
6491 | have been. */ | |
6492 | ||
6493 | if (warning_count < count) | |
6494 | { | |
6495 | header_line *h; | |
6496 | int fd; | |
6497 | pid_t pid = child_open_exim(&fd); | |
6498 | ||
6499 | if (pid > 0) | |
6500 | { | |
6501 | uschar *wmf_text; | |
6502 | FILE *wmf = NULL; | |
6503 | FILE *f = fdopen(fd, "wb"); | |
6504 | ||
6505 | if (warn_message_file != NULL) | |
6506 | { | |
6507 | wmf = Ufopen(warn_message_file, "rb"); | |
6508 | if (wmf == NULL) | |
6509 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning " | |
6510 | "message texts: %s", warn_message_file, strerror(errno)); | |
6511 | } | |
6512 | ||
6513 | warnmsg_recipients = recipients; | |
6514 | warnmsg_delay = (queue_time < 120*60)? | |
6515 | string_sprintf("%d minutes", show_time/60): | |
6516 | string_sprintf("%d hours", show_time/3600); | |
6517 | ||
6518 | if (errors_reply_to != NULL) | |
6519 | fprintf(f, "Reply-To: %s\n", errors_reply_to); | |
6520 | fprintf(f, "Auto-Submitted: auto-generated\n"); | |
6521 | fprintf(f, "From: Mail Delivery System <Mailer-Daemon@%s>\n", | |
6522 | qualify_domain_sender); | |
6523 | fprintf(f, "To: %s\n", recipients); | |
6524 | ||
6525 | wmf_text = next_emf(wmf, US"header"); | |
6526 | if (wmf_text != NULL) | |
6527 | fprintf(f, "%s\n", wmf_text); | |
6528 | else | |
6529 | fprintf(f, "Subject: Warning: message %s delayed %s\n\n", | |
6530 | message_id, warnmsg_delay); | |
6531 | ||
6532 | wmf_text = next_emf(wmf, US"intro"); | |
6533 | if (wmf_text != NULL) fprintf(f, "%s", CS wmf_text); else | |
6534 | { | |
6535 | fprintf(f, | |
6536 | "This message was created automatically by mail delivery software.\n"); | |
6537 | ||
6538 | if (Ustrcmp(recipients, sender_address) == 0) | |
6539 | fprintf(f, | |
6540 | "A message that you sent has not yet been delivered to one or more of its\n" | |
6541 | "recipients after more than "); | |
6542 | ||
6543 | else fprintf(f, | |
6544 | "A message sent by\n\n <%s>\n\n" | |
6545 | "has not yet been delivered to one or more of its recipients after more than \n", | |
6546 | sender_address); | |
6547 | ||
6548 | fprintf(f, "%s on the queue on %s.\n\n", warnmsg_delay, | |
6549 | primary_hostname); | |
6550 | fprintf(f, "The message identifier is: %s\n", message_id); | |
6551 | ||
6552 | for (h = header_list; h != NULL; h = h->next) | |
6553 | { | |
6554 | if (strncmpic(h->text, US"Subject:", 8) == 0) | |
6555 | fprintf(f, "The subject of the message is: %s", h->text + 9); | |
6556 | else if (strncmpic(h->text, US"Date:", 5) == 0) | |
6557 | fprintf(f, "The date of the message is: %s", h->text + 6); | |
6558 | } | |
6559 | fprintf(f, "\n"); | |
6560 | ||
6561 | fprintf(f, "The address%s to which the message has not yet been " | |
6562 | "delivered %s:\n", | |
6563 | (addr_defer->next == NULL)? "" : "es", | |
6564 | (addr_defer->next == NULL)? "is": "are"); | |
6565 | } | |
6566 | ||
6567 | /* List the addresses. For any that are hidden, don't give the delay | |
6568 | reason, because it might expose that which is hidden. Also, do not give | |
6569 | "retry time not reached" because that isn't helpful. */ | |
6570 | ||
6571 | fprintf(f, "\n"); | |
6572 | while (addr_defer != NULL) | |
6573 | { | |
6574 | address_item *addr = addr_defer; | |
6575 | addr_defer = addr->next; | |
6576 | if (print_address_information(addr, f, US" ", US"\n ", US"") && | |
6577 | addr->basic_errno > ERRNO_RETRY_BASE) | |
6578 | { | |
6579 | fprintf(f, "\n Delay reason: "); | |
6580 | print_address_error(addr, f); | |
6581 | } | |
6582 | fprintf(f, "\n"); | |
6583 | } | |
6584 | fprintf(f, "\n"); | |
6585 | ||
6586 | /* Final text */ | |
6587 | ||
6588 | if (wmf != NULL) | |
6589 | { | |
6590 | wmf_text = next_emf(wmf, US"final"); | |
6591 | if (wmf_text != NULL) fprintf(f, "%s", CS wmf_text); | |
6592 | fclose(wmf); | |
6593 | } | |
6594 | else | |
6595 | { | |
6596 | fprintf(f, | |
6597 | "No action is required on your part. Delivery attempts will continue for\n" | |
6598 | "some time, and this warning may be repeated at intervals if the message\n" | |
6599 | "remains undelivered. Eventually the mail delivery software will give up,\n" | |
6600 | "and when that happens, the message will be returned to you.\n"); | |
6601 | } | |
6602 | ||
6603 | /* Close and wait for child process to complete, without a timeout. | |
6604 | If there's an error, don't update the count. */ | |
6605 | ||
6606 | fclose(f); | |
6607 | if (child_close(pid, 0) == 0) | |
6608 | { | |
6609 | warning_count = count; | |
6610 | update_spool = TRUE; /* Ensure spool rewritten */ | |
6611 | } | |
6612 | } | |
6613 | } | |
6614 | } | |
6615 | ||
6616 | /* Clear deliver_domain */ | |
6617 | ||
6618 | deliver_domain = NULL; | |
6619 | ||
6620 | /* If this was a first delivery attempt, unset the first time flag, and | |
6621 | ensure that the spool gets updated. */ | |
6622 | ||
6623 | if (deliver_firsttime) | |
6624 | { | |
6625 | deliver_firsttime = FALSE; | |
6626 | update_spool = TRUE; | |
6627 | } | |
6628 | ||
6629 | /* If delivery was frozen and freeze_tell is set, generate an appropriate | |
6630 | message, unless the message is a local error message (to avoid loops). Then | |
6631 | log the freezing. If the text in "frozen_info" came from a system filter, | |
6632 | it has been escaped into printing characters so as not to mess up log lines. | |
6633 | For the "tell" message, we turn \n back into newline. Also, insert a newline | |
6634 | near the start instead of the ": " string. */ | |
6635 | ||
6636 | if (deliver_freeze) | |
6637 | { | |
6638 | if (freeze_tell != NULL && freeze_tell[0] != 0 && !local_error_message) | |
6639 | { | |
6640 | uschar *s = string_copy(frozen_info); | |
6641 | uschar *ss = Ustrstr(s, " by the system filter: "); | |
6642 | ||
6643 | if (ss != NULL) | |
6644 | { | |
6645 | ss[21] = '.'; | |
6646 | ss[22] = '\n'; | |
6647 | } | |
6648 | ||
6649 | ss = s; | |
6650 | while (*ss != 0) | |
6651 | { | |
6652 | if (*ss == '\\' && ss[1] == 'n') | |
6653 | { | |
6654 | *ss++ = ' '; | |
6655 | *ss++ = '\n'; | |
6656 | } | |
6657 | else ss++; | |
6658 | } | |
6659 | moan_tell_someone(freeze_tell, addr_defer, US"Message frozen", | |
6660 | "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id, | |
6661 | s, sender_address); | |
6662 | } | |
6663 | ||
6664 | /* Log freezing just before we update the -H file, to minimize the chance | |
6665 | of a race problem. */ | |
6666 | ||
6667 | deliver_msglog("*** Frozen%s\n", frozen_info); | |
6668 | log_write(0, LOG_MAIN, "Frozen%s", frozen_info); | |
6669 | } | |
6670 | ||
6671 | /* If there have been any updates to the non-recipients list, or other things | |
6672 | that get written to the spool, we must now update the spool header file so | |
6673 | that it has the right information for the next delivery attempt. If there | |
6674 | was more than one address being delivered, the header_change update is done | |
6675 | earlier, in case one succeeds and then something crashes. */ | |
6676 | ||
6677 | DEBUG(D_deliver) | |
6678 | debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n", | |
6679 | update_spool, header_rewritten); | |
6680 | ||
6681 | if (update_spool || header_rewritten) | |
6682 | /* Panic-dies on error */ | |
6683 | (void)spool_write_header(message_id, SW_DELIVERING, NULL); | |
6684 | } | |
6685 | ||
6686 | /* Finished with the message log. If the message is complete, it will have | |
6687 | been unlinked or renamed above. */ | |
6688 | ||
6689 | if (message_logs) fclose(message_log); | |
6690 | ||
6691 | /* Now we can close and remove the journal file. Its only purpose is to record | |
6692 | successfully completed deliveries asap so that this information doesn't get | |
6693 | lost if Exim (or the machine) crashes. Forgetting about a failed delivery is | |
6694 | not serious, as trying it again is not harmful. The journal might not be open | |
6695 | if all addresses were deferred at routing or directing. Nevertheless, we must | |
6696 | remove it if it exists (may have been lying around from a crash during the | |
6697 | previous delivery attempt). We don't remove the journal if a delivery | |
6698 | subprocess failed to pass back delivery information; this is controlled by | |
6699 | the remove_journal flag. When the journal is left, we also don't move the | |
6700 | message off the main spool if frozen and the option is set. It should get moved | |
6701 | at the next attempt, after the journal has been inspected. */ | |
6702 | ||
6703 | if (journal_fd >= 0) close(journal_fd); | |
6704 | ||
6705 | if (remove_journal) | |
6706 | { | |
6707 | sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id); | |
6708 | if (Uunlink(spoolname) < 0 && errno != ENOENT) | |
6709 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", spoolname, | |
6710 | strerror(errno)); | |
6711 | ||
6712 | /* Move the message off the spool if reqested */ | |
6713 | ||
6714 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES | |
6715 | if (deliver_freeze && move_frozen_messages) | |
6716 | (void)spool_move_message(id, message_subdir, US"", US"F"); | |
6717 | #endif | |
6718 | } | |
6719 | ||
6720 | /* Closing the data file frees the lock; if the file has been unlinked it | |
6721 | will go away. Otherwise the message becomes available for another process | |
6722 | to try delivery. */ | |
6723 | ||
6724 | close(deliver_datafile); | |
6725 | deliver_datafile = -1; | |
6726 | DEBUG(D_deliver) debug_printf("end delivery of %s\n", id); | |
6727 | ||
6728 | /* It is unlikely that there will be any cached resources, since they are | |
6729 | released after routing, and in the delivery subprocesses. However, it's | |
6730 | possible for an expansion for something afterwards (for example, | |
6731 | expand_check_condition) to do a lookup. We must therefore be sure everything is | |
6732 | released. */ | |
6733 | ||
6734 | search_tidyup(); | |
6735 | return final_yield; | |
6736 | } | |
6737 | ||
6738 | /* End of deliver.c */ |